Liquid crystal display device, backlight used for same display device, method for driving same backlight and method for manufacturing same backlight

• US 20060209000A1
• Filed: 11/14/2005
• Published: 09/21/2006
• Est. Priority Date: 10/23/2001
• Status: Active Grant

• Current Assignee: Vista Peak Ventures LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: NEC Corporation
• Inventors: Sumiyoshi, Ken, Matsushima, Jin, Yoshioka, Toshihiro, Hayama, Hiroshi
• Granted Patent: US 7,598,939 B2
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 1/133622 Colour sequential illumination
• CPC Class Codes: G09G 2300/02 Composition of display devices
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2310/024 Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A Liquid Crystal Display (LCD), a backlight used for the LCD and a method for producing the LCD and the backlight are provided which are capable of inhibiting an increase in component counts and in assembling processes and of reducing them, thereby achieving low costs. A display image is obtained by arranging a backlight section being able to perform scanning as a single unit in a manner that it positionally matches a liquid crystal displaying section. The backlight section is provided with a plurality of scanning electrodes and light emitting layers each providing a different luminescent color, and being spatially separated from each other on a principal face of the backlight and scanning is performed on a plurality of light emitting layers providing a different luminescent color.

Claims

14. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display section,

wherein said backlight section comprises a backlight face, a plurality of scanning electrodes, a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face; and

a tone changing circuit to change light emitting time of each of said luminescent colors in a scanning direction in said backlight and thus to change a color tone in a region being scanned.

15. The liquid crystal display device according to claim 14, further comprising a controller to have a scanning phase in said backlight section lag behind a scanning phase in said liquid crystal displaying section.

18. The liquid crystal display device according to claim 14, further comprising a luminance changing circuit to change light emitting time in a region where light is being fed in a scanning direction in said backlight thus to change maximum luminance of light in said region being scanned.

19. The liquid crystal display device according to claim 14, being provided with a light diffusing layer between said liquid crystal display section and said backlight section to diffuse light fed from said backlight section in a plane direction inside said light diffusing layer.

20. The liquid crystal display device according to claim 14, wherein light fed from said backlight section is generated by discharge in a gas.

21. The liquid crystal display device according to claim 14, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

22. The liquid crystal display device according to claim 14, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

23. The liquid crystal display device according to claim 14, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

24. The liquid crystal display device according to claim 14, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

25. The liquid crystal display device according to claim 14, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

26. The liquid crystal-display device according to claim 14, wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

27. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display section wherein a width of screen scanning in said backlight section is larger than a width of screen scanning in said liquid crystal display section.

28. The liquid crystal display device according to claim 27, wherein said width of screen scanning in said backlight section is an integral multiple of said width of screen scanning in said liquid crystal display section.

29. The liquid crystal display device according to claim 27, further comprising a controller to have a scanning phase in said backlight section lag behind a scanning phase in said liquid crystal displaying section.

30. The liquid crystal display device according to claim 27, wherein, in said liquid crystal display section, illuminating light for displaying is applied from said backlight section to a pixel existing in a vicinity of a selected scanning line and illuminating light for displaying is not applied from said backlight section to a pixel in a non-selected scanning line.

31. The liquid crystal display device according to claim 30, wherein said liquid crystal display section is driven in a simple matrix manner.

32. The liquid crystal display device according to claim 27, further comprising a luminance changing circuit to change light emitting time in a region where light is being fed in a scanning direction in said backlight thus to change maximum luminance of light in said region being scanned.

33. The liquid crystal display device according to claim 27, being provided with a light diffusing layer between said liquid crystal display section and said backlight section to diffuse light fed from said backlight section in a plane direction inside said light diffusing layer.

34. The liquid crystal display device according to claim 27, wherein light fed from said backlight section is generated by discharge in a gas.

35. The liquid crystal display device according to claim 27, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

36. The liquid crystal display device according to claim 27, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

37. The liquid crystal display device according to claim 27, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

38. The liquid crystal display device according to claim 27, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

39. The liquid crystal display device according to claim 27, wherein said backlight section comprises a backlight face, a plurality of light emitting layers each having a luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said luminescent colors is independently is scanned, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

40. The liquid crystal display device according to claim 27, wherein said backlight section comprises a backlight face, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said light emitting layer groups is scanned as a scanning unit, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

41. The liquid crystal display device according to claim 27, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

42. The liquid crystal display device according to claim 27, wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

43. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display section wherein said backlight section has a plurality of scanning electrodes; and

a phase-delay circuit to have a scanning phase in said backlight section lag behind a scanning phase in said liquid crystal display section wherein light fed from said backlight section is fed after a response by said liquid crystal display section.

44. The liquid crystal display device according to claim 43, wherein, in said liquid crystal display section, illuminating light for displaying is applied from said backlight section to a pixel existing in a vicinity of a selected scanning line and illuminating light for displaying is not applied from said backlight section to a pixel in a non-selected scanning line.

45. The liquid crystal display device according to claim 44, wherein said liquid crystal display section is driven in a simple matrix manner.

46. The liquid crystal display device according to claim 43, further comprising a luminance changing circuit to change light emitting time in a region where light is being fed in a scanning direction in said backlight thus to change maximum luminance of light in said region being scanned.

47. The liquid crystal display device according to claim 43, being provided with a light diffusing layer between said liquid crystal display section and said backlight section to diffuse light fed from said backlight section in a plane direction inside said light diffusing layer.

48. The liquid crystal display device according to claim 43, wherein light fed from said backlight section is generated by discharge in a gas.

49. The liquid crystal display device according to claim 43, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

50. The liquid crystal display device according to claim 43, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

51. The liquid crystal display-device according to claim 43, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

52. The liquid crystal display device according to claim 43, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

53. The liquid crystal display device according to claim 43, wherein said backlight section comprises a backlight face, a plurality of light emitting layers each having a luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said luminescent colors is independently is scanned, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

54. The liquid crystal display device according to claim 43, wherein said backlight section comprises a backlight face, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said light emitting layer groups is scanned as a scanning unit, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

55. The liquid crystal display device according to claim 43, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

56. The liquid crystal display device according to claim 43, wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

57. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display device; and

a prism layer made up of a single layer or a plurality of layers used to change light fed from said backlight section into light having directivity, being mounted between said liquid crystal display section and said backlight section.

58. The liquid crystal display device according to claim 57, further comprising said backlight section, said prism layer, a light diffusing layer used to diffuse light fed through said prism layer from said backlight section in a plane direction inside said light diffusing layer and said liquid crystal display section, which are stacked in layers in this order.

59. The liquid crystal display device according to claim 57, wherein light fed from said backlight section is generated by discharge in a gas.

60. The liquid crystal display device according to claim 57, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

61. The liquid crystal display device according to claim 57, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

62. The liquid crystal display device according to claim 57, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

63. The liquid crystal display device according to claim 57, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

64. The liquid crystal display device according to claim 57, wherein said backlight section comprises a backlight face, a plurality of light emitting layers each having a luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said luminescent colors is independently is scanned, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

65. The liquid crystal display device according to claim 57, wherein said backlight section comprises a backlight face, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said light emitting layer groups is scanned as a scanning unit, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

66. The liquid crystal display device according to claim 57, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

67. The liquid crystal display device according to claim 57, wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

68. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display section; and

an anti-EMI (Electro-Magnetic interference) filter layer being mounted between said liquid crystal display section and said backlight section.

69. The liquid crystal display device according to claim 68, wherein said anti-EMI filter layer is mounted internally in said liquid crystal displaying section.

70. The liquid crystal display device according to claim 68, wherein light fed from said backlight section is generated by discharge in a gas.

71. The liquid crystal display device according to claim 68, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

72. The liquid crystal display device according to claim 68, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

73. The liquid crystal display device according to claim 68, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

74. The liquid crystal display device according to claim 68, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

75. The liquid crystal display device according to claim 68, wherein said backlight section comprises a backlight face, a plurality of light emitting layers each having a luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said luminescent colors is independently is scanned, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

76. The liquid crystal display device according to claim 68, wherein said backlight section comprises a backlight face, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said light emitting layer groups is scanned as a scanning unit, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

77. The liquid crystal display device according to claim 68, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

78. The liquid crystal display device according to claim 68, wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

79. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display section; and

wherein said backlight section, an anti-EMI (Electro-Magnetic Interference) filter layer, a light diffusing layer used to diffuse light fed through said anti-EMI filter layer from said backlight in a plane direction inside said light diffusing layer, and said liquid crystal display section are arranged in this order.

80. The liquid crystal display device according to claim 79, wherein light fed from said backlight section is generated by discharge in a gas.

81. The liquid crystal display device according to claim 79, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

82. The liquid crystal display device according to claim 79, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

83. The liquid crystal display device according to claim 79, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

84. The liquid crystal display device according to claim 79, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

85. The liquid crystal display device according to claim 79, wherein said backlight section comprises a backlight face, a plurality of light emitting layers each having a luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said luminescent colors is independently is scanned, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

86. The liquid crystal display device according to claim 79, wherein said backlight section comprises a backlight face, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said light emitting layer groups is scanned as a scanning unit, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

87. The liquid crystal display device according to claim 79, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

88. The liquid crystal display device according to claim 79, wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

89. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display section; and

either of an infrared ray absorbing layer to absorb infrared rays or an infrared ray reflecting filter layer to reflect infrared rays, being mounted between said liquid crystal display section and said backlight section.

90. The liquid crystal display device according to claim 89, wherein light fed from said backlight section is generated by discharge in a gas.

91. The liquid crystal display device according to claim 89, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

92. The liquid crystal display device according to claim 89, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

93. The liquid crystal display device according to claim 89, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

94. The liquid crystal display device according to claim 89, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

95. The liquid crystal display device according to claim 89, wherein said backlight section comprises a backlight face, a plurality of light emitting layers each having a luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said luminescent colors is independently is scanned, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

96. The liquid crystal display device according to claim 89, wherein said backlight section comprises a backlight face, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said light emitting layer groups is scanned as a scanning unit, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

97. The liquid crystal display device according to claim 89, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

98. The liquid crystal display device according to claim 89t wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

99. A liquid crystal display device having four sides comprising:

a liquid crystal display section provided with a plurality of scanning lines and a plurality of signal lines;

a backlight section used to feed illuminating light to said liquid crystal display section and being provided with a plurality of scanning electrodes;

wherein a side at which there is placed a terminal portion of each of said plurality of scanning lines and said plurality of said signal lines in said liquid crystal display section are different from a side at which there placed a terminal portion of said plurality of said scanning electrodes in said backlight section.

1. A liquid crystal display device comprising:

a liquid crystal display section;

a backlight section used to feed illuminating light to said liquid crystal display section,

wherein said backlight section comprises a backlight face, a scanning electrode portion of which is made up of a plurality of scanning electrode groups each having a plurality of scanning electrodes, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face; and

a scanning drive circuit to scan every the emitting layer group, as a scanning unit.

2. The liquid crystal display device according to claim 1, further comprising a controller to have a scanning phase in said backlight section lag behind a scanning phase in said liquid crystal displaying section.

3. The liquid crystal display device according to claim 1, wherein, in said liquid crystal display section, illuminating light for displaying is applied from said backlight section to a pixel existing in a vicinity of a selected scanning line and illuminating light for displaying is not applied from said backlight section to a pixel in a non-selected scanning line.

4. The liquid crystal display device according to claim 3, wherein said liquid crystal display section is driven in a simple matrix manner.

5. The liquid crystal display device according to claim 1, further comprising a luminance changing circuit to change light emitting time in a region where light is being fed in a scanning direction in said backlight thus to change maximum luminance of light in said region being scanned.

6. The liquid crystal display device according to claim 1, being provided with a light diffusing layer between said liquid crystal display section and said backlight section to diffuse light fed from said backlight section in a plane direction inside said light diffusing layer.

7. The liquid crystal display device according to claim 1, wherein light fed from said backlight section is generated by discharge in a gas.

8. The liquid crystal display device according to claim 1, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

9. The liquid crystal display device according to claim 1, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

10. The liquid crystal display device according to claim 1, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

11. The liquid crystal display device according to claim 1, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

12. The liquid crystal display device according to claim 1, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

13. The liquid crystal display device according to claim 1r wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

16. The liquid crystal display device according to claim 4, wherein, in said liquid crystal display section, illuminating light for displaying is applied from said backlight section to a pixel existing in a vicinity of a selected scanning line and illuminating light for displaying is not applied from said backlight section to a pixel in a non-selected scanning line.

17. The liquid crystal display device according to claim 16, wherein said liquid crystal display section is driven in a simple matrix manner.

100. The liquid crystal display device according to claim 99, wherein light fed from said backlight section is generated by discharge in a gas.

101. The liquid crystal display device according to claim 99, wherein a gas is filled in said backlight section in a hermetic manner and wherein light fed from said backlight section is fluorescent light emitted from a fluorescent material excited by excitation light generated by discharge in said gas.

102. The liquid crystal display device according to claim 99, wherein a fluorescent layer is mounted on a front face of said liquid crystal display section and wherein light fed from said backlight section, after having passed through said liquid crystal display section, enters into said fluorescent layer.

107. The liquid crystal display device according to claim 99, wherein said backlight section is maintained under vacuum and has a scanning electrode used to scan an electron source and an electron fed from said electron source is guided into a fluorescent layer and wherein light fed from said backlight section is produced by accelerating electrons under said vacuum and injecting the accelerated electrons into said fluorescent layer.

104. The liquid crystal display device according to claim 99, wherein said backlight section is provided with an electroluminescent device and light fed from said backlight section is electroluminescent light.

105. The liquid crystal display device according to claim 99, wherein said backlight section comprises a backlight face, a plurality of light emitting layers each having a luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said luminescent colors is independently is scanned, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

106. The liquid crystal display device according to claim 99, wherein said backlight section comprises a backlight face, a plurality of light emitting layer groups, each of which is made up of a plurality of light emitting layers each having a different luminescent color, and being spatially separated from each other on said backlight face, and in scanning of said backlight section, each of said light emitting layer groups is scanned as a scanning unit, and wherein timing of scanning on a screen of said liquid crystal display section is synchronized with timing of scanning on a screen of said backlight section.

108. The liquid crystal display device according to claim 99, wherein a screen scanning period in said liquid crystal display section is equal to a screen scanning period in said backlight section and wherein screen scanning in said liquid crystal display section is performed once during a period when screen scanning in said backlight section is performed two or more times.

107-1. The liquid crystal display device according to claim 99, wherein scanning on a screen of said liquid crystal display section and of said backlight section is performed in a same period.

109. A plane-type backlight comprising:

a first substrate and a second substrate being mounted apart from each other wherein gas is fed into space existing between said first substrate and said second substrate and a portion surrounding said space is sealed in a hermetic manner;

a common electrode being mounted on said first substrate;

a plurality of scanning electrodes being mounted on said second substrate; and

wherein a voltage is applied between said common electrode and each of said scanning electrodes to cause discharging to occur in said space between said first substrate and said second substrate and wherein light is emitted by exciting a fluorescent material being arranged between said first substrate and said second substrate; and

wherein said common electrode is made up of electrodes formed so as to be at a same potential on an entire light emitting face; and

a selecting circuit used to sequentially select one scanning electrode out of said plurality of scanning electrodes.

110. The plane-type backlight according to claim 109, wherein said common electrode and said plurality of said scanning electrode are respectively made up of a plurality of belt-shaped electrodes being extended in a same direction and each of said belt-shaped electrodes corresponds to each luminescent color having one of RGB (red, green, and blue) colors.

111. The plane-type backlight according to claim 109, wherein said common electrode and said plurality of said scanning electrode are made up of belt-shaped electrodes intersecting at right angles to each other and each of said belt-shaped electrodes corresponds to each luminescent color having one color out of said RGB colors.

112. The plane-type backlight according to claim 109, wherein at least one of said common electrode and said plurality of said scanning electrode is made up of a plurality of belt-shaped electrodes and a control electrode used to inhibit expansion of light emission is mounted between two said belt-shaped electrodes adjacent to each other.

113. A plane-type backlight comprising:

a first substrate and a second substrate being mounted apart from each other wherein gas is fed into space existing between said first substrate and a second substrate and a portion surrounding said space is sealed in a hermetic manner;

a common electrode being mounted on said first substrate;

a plurality of scanning electrodes being mounted on said second substrate; and

wherein a voltage is applied between said common electrode and each of said scanning electrodes to cause discharging to occur in said space existing between said first substrate and said second substrate and wherein light is emitted by exciting a fluorescent material being arranged between said first substrate and said second substrates and wherein said common electrodes and said plurality of scanning electrodes are made up of a plurality of belt-shaped electrodes being extended in a same direction; and

a selecting circuit used to sequentially select one scanning electrode out of said plurality of scanning electrodes.

114. The plane-type backlight according to claim 113, wherein said common electrode and the corresponding scanning electrode both being made up of said belt-shaped electrodes are configured to deviate positionally from each other by a half period.

115. The plane-type backlight according to claim 113, wherein at least one of said common electrode and said plurality of said scanning electrode is made up of a plurality of belt-shaped electrodes and a control electrode used to inhibit expansion of light emission is mounted between two said belt-shaped electrodes adjacent to each other.

116. A plane-type backlight comprising:

a first substrate and a second substrate being mounted apart from each other wherein gas is fed into space existing between said first substrate and said second substrate and a portion surrounding said space is sealed in a hermetic manner;

a common electrode being mounted on said first substrate;

a plurality of scanning electrodes being mounted on said second substrate;

wherein a voltage is applied between said common electrode and each of said scanning electrode to cause discharging to occur in said space existing between said first substrate and said second substrate and wherein light is emitted by exciting a fluorescent material being arranged between said first substrate and said second substrate; and

a protrusion being protruded toward a side of a discharging space existing between electrodes facing each other on at least one of said common electrode and said plurality of said scanning electrode.

117. The plane-type backlight according to claim 116, wherein said protrusion is placed on a dielectric layer used to electrically insulate said discharging space from said electrode.

118. The plane-type backlight according to claim 116, wherein said protrusion is placed on an electrode being exposed in said discharging space.

119. The plane-type backlight according to claim 116, wherein at least one of said common electrode and said plurality of said scanning electrode is made up of a plurality of belt-shaped electrodes and a control electrode used to inhibit expansion of light emission is mounted between two said belt-shaped electrodes adjacent to each other.

120. A plane-type backlight comprising:

a first substrate and a second substrate being mounted apart from each other wherein gas is fed into space existing between said first substrate and said second substrate and a portion surrounding said space is sealed in a hermetic manner;

a common electrode and a plurality of scanning electrodes being mounted on said first substrate;

wherein a voltage is applied between said common electrode and each of said scanning electrode to cause discharging to occur in said space existing between said first substrate and said second substrate and wherein light is emitted by exciting a fluorescent material being arranged between said first substrate and said second substrate and

a selecting circuit used to sequentially select one scanning electrodes out of said plurality of scanning electrodes.

121. The plane-type backlight according to claim 120, wherein, on said first substrate, said common electrode and said plurality of said scanning electrodes are formed in a same face and said belt-shaped scanning electrode is arranged between common electrodes a plane of which is of a comb-teeth shape.

122. The plane-type backlight according to claim 120, wherein said common electrode and said plurality of said scanning electrode are stacked in layer with an insulating film interposed between said common electrode and said plurality of said scanning electrode on a side of said first substrate and wherein an opening is provided on said electrode mounted on a first layer out of said electrodes being stacked in two layers.

123. A discharging-type backlight for a liquid crystal display device comprising:

an auxiliary discharging region existing adjacent to an outside of a light emitting region for displaying in a light emitting region for discharging in which scanning lines being adjacent to each other to initiate light emitting for scanning do not emit light, which causes discharging to occur immediately before initiation of at least light emitting for scanning.

124. The discharging-type backlight according to claim 123, wherein said auxiliary discharging region keeps discharging continuously during light emission for scanning and discharging.

125. The discharging-type backlight according to claim 123, wherein an area of an auxiliary discharging electrode used to have discharging occur in said auxiliary discharging region is smaller than that of an electrode used to emit light for scanning and discharging.

126. The discharging-type backlight according to claim 123, wherein a thickness of a dielectric layer covering said auxiliary discharging electrode is greater than that of a dielectric layer covering an electrode used to emit light for scanning and discharging.

127. The discharging-type backlight according to claim 123, wherein a portion surrounding said auxiliary discharging region is a region of a fluorescent material layer.

128. The discharging-type backlight according to claim 123, wherein a partition wall is placed outside of a light emitting region for discharging in which scanning is initiated and invasion of light for discharging in a region in which discharging is kept continuously into a light emitting region for scanning is reduced.

129. The discharging-type backlight according to claim 123, wherein a region in which light emission for scanning is initiated is placed outside of a displaying region.

130. The discharging-type backlight according to claim 123, wherein an electrode for discharging to initiate light emission for scanning is placed outside of said displaying region.

131. A method for driving a plane discharging-type backlight which comprises a first glass substrate and a second glass substrate, a first electrode formed on said first glass substrate, a second electrode formed on said second glass substrate, at least one of which is covered with a dielectric layer, wherein gas is fed into space formed between said first glass substrate and second glass substrate and a portion surrounding said space is sealed in a hermetic manner and wherein a voltage is applied between said first and said second electrode to have discharging occur in a space between said first and said second glass substrate and light is emitted by exciting a fluorescent material being placed between said first glass and said second glass substrate, said method comprising:

a step of constructing at least one of said first and second electrodes to have discharging occur of a plurality of belt-shaped electrodes; and

a step of applying a DC (direct current) voltage to one belt-shaped electrode out of said plurality Of belt-shaped electrodes during light emission for scanning and discharging in a region in which said belt-shaped electrode emits light for discharging and of applying a sine waveform voltage or a rectangular waveform voltage to an other electrode opposed to said belt-shaped electrode.

132. The method for driving the plane discharging-type backlight according to claim 131, wherein scanning is performed on light emitting region for discharging by scanning a DC voltage to be applied to said belt-shaped electrode.

133. The method for driving the plane discharging-type backlight according to claim 131, wherein intensity of light emitted for scanning and discharging is varied by changing a DC voltage value to be applied to said belt-shaped electrode.

134. The method for driving the plane discharging-type backlight according to claim 131, wherein a width of a region of light emission for scanning is varied by changing a number of belt-shaped electrodes to which said DC voltage is applied.

135. The method for driving the plane discharging-type backlight according to claim 131, wherein luminance of light fed from the backlight is varied by changing a frequency of an AC (alternating current) voltage to be applied to said another electrode.

136. A liquid crystal display device comprising:

a liquid crystal display section; and

a backlight comprising;

a first substrate and a second substrate being mounted apart from each other wherein gas is fed into space existing between said first substrate and said second substrate and a portion surrounding said space is sealed in a hermetic manner;

a common electrode being mounted on said first substrate; and

a plurality of scanning electrodes being mounted on said second substrate;

wherein a voltage is applied between said common electrode and each of said scanning electrodes to cause discharging to occur in said space between said first substrate and said second substrate and wherein light is emitted by exciting a fluorescent material being arranged between said first substrate and said second substrate; and

wherein said common electrode is made up of electrodes formed so as to be at a same potential on an entire light emitting face; and

a selecting circuit used to sequentially select one scanning electrode out of said plurality of scanning electrodes;

wherein scanning on said backlight and scanning on said liquid crystal display section are performed in a same period.

137. A liquid crystal display device comprising:

a liquid crystal display section; and

a backlight comprising;

a first substrate and a second substrate being mounted apart from each other wherein gas is fed into space existing between said first substrate and a second substrate and a portion surrounding said space is sealed in a hermetic manner;

a common electrode being mounted on said first substrate;

a plurality of scanning electrodes being mounted on said second substrate; and

wherein a voltage is applied between said common electrode and each of said scanning electrodes to cause discharging to occur in said space existing between said first substrate and said second substrate and wherein light is emitted by exciting a fluorescent material being arranged between said first substrate and said second substrates and wherein said common electrodes and said plurality of scanning electrodes are made up of a plurality of belt-shaped electrodes being extended in a same direction; and

a selecting circuit used to sequentially select one scanning electrode out of said plurality of scanning electrodes

wherein scanning on said backlight and scanning on said liquid crystal display section are performed in a same period.

138. A liquid crystal display device comprising:

a liquid crystal display section; and

a backlight comprising;

a first substrate and a second substrate being mounted apart from each other wherein gas is fed into space existing between said first substrate and said second substrate and a portion surrounding said space is sealed in a hermetic manner;

a common electrode being mounted on said first substrate;

a plurality of scanning electrodes being mounted on said second substrate;

wherein a voltage is applied between said common electrode and each of said scanning electrode to cause discharging to occur in said space existing between said first substrate and said second substrate and wherein light is emitted by exciting a fluorescent material being arranged between said first substrate and said second substrate; and

a protrusion being protruded toward a side of a discharging space existing between electrodes facing each other on at least one of said common electrode and said plurality of said scanning electrode.

wherein scanning on said backlight and scanning on said liquid crystal display section are performed in a same period.

139. A method for manufacturing a backlight comprising:

a step of forming a scanning electrode, a common electrode, and a fluorescent layer on either of two substrates;

a step of forming a seal layer having a plurality of partitions on either of said two substrates; and

a step of collectively forming a plurality of backlight units by bonding said two substrates together and cutting the bonded two substrates for every sealing partition and by filling gas in a hermetic manner into each sealing partition.

140. A method for manufacturing a backlight comprising:

a step of forming a scanning electrode, a common electrode, and a fluorescent layer on either of two substrates;

a step of forming a seal layer having a plurality of partitions on either of said two substrates; and

a step of collectively forming a plurality of backlight units by bonding said two substrates together and filling gas in a hermetic manner and then cutting the bonded two substrates filled with gas for every sealing partition.