Device, system and method for electronic true color display

• US 20040100589A1
• Filed: 12/09/2002
• Published: 05/27/2004
• Est. Priority Date: 06/07/2000
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Genoa Color Technologies Limited (Samsung Electronics Co. Ltd.)
• Inventors: Ben-Chorin, Moshe, Ben-David, Ilan
• Granted Patent: US 7,113,152 B2
• Time in Patent Office: Days
• US Class Current: 348/743
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 9/3114 by using a sequential colour filter producing one colour at a time

Abstract

A device, system and a method for displaying image data of a plurality of colors, the device comprising a light source (50) for producing light having at least four primary colors, a controller (56, 58) for determining a combination of at least four primary colors according to the image data (72) for production by the light source and a viewing screen (60) for displaying the image data the combination from the controller. The present invention is not limited to combinations of colors which are produced from only three primary colors, such as red, green and blue.

Claims

1. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light source for producing light having at least four primary colors;

(b) a controller for determining a combination of at least one of said at least four primary colors according to the image data for production by said light source, such that said controller is separate from said light source; and

(c) a viewing screen for displaying the image data according to said combination from said controller.

2. The device of claim 1, wherein said light source features a plurality of monochromatic sources, each monochromatic source producing light of one of said at least four primary colors.

3. The device of claim 2, wherein said viewing screen features a plurality of groups of pixels, each group of pixels including at least four pixels, each pixel corresponding to a primary color.

4. The device of claim 2, wherein said monochromatic light source is a laser.

5. The device of claim 1, further comprising:

(d) a projector for projecting light of said at least four primary colors onto said viewing screen according to said combination.

6. The device of claim 5, wherein said light source comprises:

(i) a polychromatic source; and

(ii) at least four color filters, each color filter corresponding to a primary color for filtering polychromatic light from said polychromatic source to produce light of said at least four primary colors.

7. The device of claim 6, wherein said projector further comprises a spatial light modulator for determining a path of light of each primary color.

8. The device of claim 7, wherein said projector spatially alters a path of light of each primary color for projection onto said viewing screen.

9. The device of claim 7, wherein said projector determines projection of light of each primary color according to a temporal sequence.

10. The device of claim 9, wherein said light source further comprises:

(ii) a color wheel for holding said color filters; and

(iv) a motor for rotating said color wheel.

11. The device of claim 10, where said spatial light modulator is selected from the group consisting of a binary modulation type and a continuous modulation type.

12. The device of claim 11, wherein said spatial light modulator is selected from the group consisting of DMD, FLC, quantum well modulator and electro-optical modulator.

13. The device of claim 11, wherein said spatial light modulator is selected from the group consisting of LCD, electrooptical modulator and magneto-optical modulator.

14. The device of claim 6, where said spatial light modulator is selected from the group consisting of a binary modulation type and a continuous modulation type.

15. The device of claim 14, wherein said spatial light modulator is selected from the group consisting of DMD, FLC, quantum well modulator and electro-optical modulator.

16. The device of claim 14, wherein said spatial light modulator is selected from the group consisting of LCD, electro-optical modulator and magneto-optical modulator.

17. The device of claim 6, wherein said light source further comprises a continuously variable neutral density filter for controlling brightness of said light of said at least four primary colors.

18. The device of claim 1, wherein said light source produces light of six primary colors.

19. The device of claim 1, wherein said light source additionally produces white light for controlling brightness of said light of said at least four primary colors.

20. The device of claim 1, wherein said combination from said controller is digital image data.

21. The device of claim 1, wherein said combination from said controller is an analog image signal.

27. The device of claim 1, wherein the controller translates a first color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of the n primaries, and wherein the controller performs the steps of:

mapping a point P on the chromaticity diagram, the point P representing a color P;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point P and two points chosen from points C1 through Cn;

mapping the first color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point P and the points X and Y chosen from points C1 through Cn; and

using the points X and Y and a third point to create an additive linear combination.

28. The device of claim 1, wherein the primary colors are created by a method comprising:

creating a set of sample colors; and

determining a set of primary colors accurately simulating the set of sample colors.

29. The device of claim 1, wherein the light source comprises:

a first primary having a set of wavelengths falling within the range of approximately 450 nanometers and below;

a second primary having a set of wavelengths falling within the range of approximately 600 nanometers and above; and

a third primary having a set of wavelengths centered around a center wavelength of approximately 500 to 55011 and having a width of wavelengths not exceeding approximately 100 nm.

30. The device of claim 1, wherein said light producing means features a plurality of monochromatic sources, each monochromatic source producing light of one of said at least four primary colors.

31. The device of claim 1, fierier comprising:

(d) a projector means for projecting light of said at least four primary colors onto said viewing screen according to said combination.

32. The device of claim 5, wherein said light producing means comprises:

(i) a polychromatic source; and

(ii) at least four color filters, each color filter corresponding to a primary color for filtering polychromatic light from said polychromatic source to produce light of said at least four primary colors.

33. The device of claim 7, wherein said projector means determines projection of light of each primary color according to a temporal sequence.

34. The device of claim 1, wherein said light producing means produces light of six primary colors.

22. A system for displaying image data of a plurality of colors, the system comprising:

(a) a light source for producing light having at least four primary colors;

(b) a converter for converting the image data to a combination of at least one of said at least four primary colors to form a map;

(c) a controller for controlling a production of said combination from said light source, wherein said controller is separate from said light source; and

(d) a viewing screen for displaying the image data from said combination from said light source as controlled by said controller.

23. In a device for displaying image data of a plurality of colors, the device comprising a light source for producing light having at least four primary colors and a viewing screen for displaying the image, the light being projected onto the viewing screen, a method for creating the image for displaying, the method comprising:

(a) producing light by the light source of at least four primary colors;

(b) determining a path for light of each primary color according to the image data; and

(c) projecting said light of each primary color according to said path onto the viewing screen to form the image.

24. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light source for producing light having at least four primary colors, said light source comprising;

(i) apolyochromatic source;

(ii) at least four color filters, each color filter corresponding to a primary color for filtering polychromatic light from said polychromatic source to produce light of said at least four primary colors;

(iii) a continuously variable neutral density filter;

(iv) a color wheel for holding said color filters and said continuously variable neutral density filter, and

(v) a motor for rotating said color wheel;

(b) a controller for determining a combination of at least one of said at least four primary colors according to the image data for production by said light source, such that said controller is separate from said light source;

(c) a viewing screen for displaying the image data according to said combination from said controller; and

(d) a projector for projecting light of said at least four primary colors onto said viewing screen according to said combination, further comprising a spatial light modulator for determining a path of light of each primary color, for determining projection of light of each primary color according to a temporal sequence.

25. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light producing means for producing light having at least four primary colors, said light producing means comprising;

(i) a polychromatic source;

(ii) at least four color filters, each color filter corresponding to a primary color for filtering polychromatic light from said polychromatic source to produce light of said at least four primary colors;

(iii) a continuously variable neutral density filter;

(iv) a color wheel for holding said color filters and said continuously variable neutral density filter; and

(v) a motor for rotating said color wheel;

(b) a controller means for determining a combination of at least one of said at least four primary colors according to the image data for production by said light source;

(c) a viewing screen for displaying the image data according to said combination from said controller; and

(d) a projector means for projecting light of said at least four primary colors onto said viewing screen according to said combination, further comprising a spatial light modulator means for determining a path of light of each primary color, for determining projection of light of each primary color according to a temporal sequence.

26. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light source for producing light having at least four primary colors, wherein at least three of the primary colors include substantially all wavelengths in the visible spectrum;

(b) a controller for determining a combination of at least one of said at least four primary colors according to the image data for production by said light source, such that said controller is separate from said light source; and

(c) a viewing screen for displaying the image data according to said combination from said controller.

35. A system for displaying image data of a plurality of colors, the system comprising:

(a) a light producing means for producing light having at least four primary colors;

(b) a converter means for converting the image data to a combination of at least one of said at least four primary colors to form a map;

(c) a controller means for controlling a production of said combination from said light source; and

(d) a viewing screen for displaying the image data from said combination from said light source as controlled by said controller.

36. A method for translating a three value color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, where the two dimensions represent a first value and a second value of the three value color space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of the n primaries, the method comprising:

mapping a point P on the chromaticity diagram, the point P representing a color P and being within the space bordered by the points C1 through Cn;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point P and two adjacent points chosen from points C1 through Cn;

mapping the three value color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point P and the points X and Y chosen from points C1 through Cn;

using the three colors forming the triangle T to create an additive linear combination; and

solving the additive linear combination for the constant ap, representing the contribution of the color P to the n primary color space signal, the constant ax, representing the contribution of the color corresponding to point X to the n primary color space signal, and the constant ay, representing the contribution of the color corresponding to point Y to the n primary color space signal.

37. The method of claim 36, wherein the point P corresponds to a substantially white color.

38. The method of claim of 36, wherein a set of points Q chosen from points C1 through Cn do not form the triangle T, comprising determining the contribution of the colors represented by the points Q to the color space signal based on the contribution of the colors represented by the points Q to the color P.

39. The method of claim of 36, wherein the color P-is formed from a combination of the n primaries.

40. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light source for producing light having at least four primary colors;

(b) a controller performing at least the steps of claim B1; and

(c) a viewing screen for displaying the image data according to said combination from said controller.

41. A method for translating a first color space signal to an n primary color space signal using a chromaticity diagram which is expressed in a two dimensional space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of the n primaries, the chromaticity diagram including a point P representing a color P, the method comprising:

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point P and two adjacent points Cx and Cy being chosen from points C1 through Cn;

mapping the first color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point P and the points X and Y; and

determing the constants ap, ax, and ay, ap representing the contribution of the color P to the n primary color space signal, ax representing the contribution of the color corresponding to point X to the n primary color space signal, and ay representing the contribution of the color corresponding to point Y to the n primary color space signal.

42. The method of claim 41, wherein the point P corresponds to a substantially white color.

43. The method of claim of 41, wherein a set of points Q chosen from points C1 through Cn do not form the triangle T, comprising determining the contribution of the colors represented by the points Q to the color space signal based on the contribution of the colors represented by the points Q to the color P.

44. A method for translating a three value color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, where the two dimensions represent a first value and a second value of the three value color space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of the n primaries, the method comprising:

mapping a point Pa on the chromaticity diagram, the point Pa representing a color Pa and being within the space bordered by the points C1 through Cn;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point Pa and a pair of adjacent points Cx and Cy, the points Cx and Cy being chosen from points C1 through Cn;

for each adjacent pair of points Cx and Cy chosen from points Cl through Cn, mapping a corresponding point Px corresponding to a color Px, the color Px being formed from the subset of the n primaries not including the primaries corresponding to Cx and Cy;

mapping the three value color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point Pa and the points X and Y;

determining a triangle S substantially overlapping triangle T, triangle S being formed by the corresponding point Px corresponding to the points X and Y and by the points X and Y;

using the three colors forming the triangle S to create an additive linear combination; and

solving the additive linear combination for the constant ap, representing the contribution of the color represented by the corresponding point Px to the n primary color space signal, the constant ax, representing the contribution of the color corresponding to point X to the n primary color space signal, and the constant ay, representing the contribution of the color corresponding to point Y to the n primary color space signal.

45. The method of claim 44, wherein the point Pa corresponds to a substantially white color.

46. The method of claim of 44, wherein a set of points Q chosen from points C1 through Cn do not form the triangle S, comprising determining the contribution of the colors represented by the points Q to the color space signal based on the contribution of the colors represented by the points Q to the color P.

47. The method of claim of 44, wherein the color Pa is formed from a combination of the n primaries.

48. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light source for producing light having at least four primary colors;

(b) a controller performing at least the steps of claim 44;

and

(c) a viewing screen for displaying the image data according to said combination from said controller.

49. A method for translating a first color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, where the two dimensions represent a first value and a second value of the first color space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of the n primaries, the method comprising:

mapping a point Pa on the chromaticity diagram, the point Pa representing a color Pa and being within the space bordered by the points C1 through Cn;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point Pa and a pair of adjacent points Cx and Cy, the points Cx and Cy being chosen from points C1 through Cn;

for each pair of adjacent points Cx and Cy chosen from points C1 through Cn, mapping a corresponding point Px corresponding to a color Px, the color Px being formed from the subset of the n primaries not including the primaries corresponding to Cx and Cy;

mapping the first color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point Pa and the points X and Y;

determining a triangle S substantially overlapping triangle T, triangle S being formed by the corresponding point Px corresponding to the points X and Y and by the points X and Y;

using the three colors forming the triangle S to create an additive linear combination; and

determining the constants ap, ax, and ay, ap representing the contribution of the color represented by the corresponding point Px to the n primary color space signal, ax representing the contribution of the color corresponding to point X to the n primary color space signal, and ay representing the contribution of the color corresponding to point Y to the n-primary color space signal.

50. The method of claim 49, wherein the point Pa corresponds to a substantially white color.

51. The method of claim of 49, wherein a set of points Q chosen from points C1 through Cn do not form the triangle S, comprising determining the contribution of the colors represented by the points Q to the color space signal based on the contribution of the colors represented by the points Q to the color P.

52. The method of claim of 49, wherein the color Pa is formed from a combination of the n primaries.

53. A color display comprising:

(a) a light source;

(b) a controller converting a three value color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of n primaries, the controller performing at least the steps of;

mapping a point Pa on the chromaticity diagram, the point Pa representing a color Pa and being within the space bordered by the points Cl through Cn;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point Pa and a pair of adjacent points Cx and Cy, the points Cx and Cy being chosen from points C1 through Cn;

for each adjacent pair of points Cx and Cy chosen from points C1 through Cn, mapping a corresponding point Px corresponding to a color Px, the color Pi being formed from the subset of the n primaries not including the primaries corresponding to Cx and Cy;

mapping the three value color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point Pa and the points X and Y;

determining a triangle S substantially overlapping triangle T, triangle S being formed by the corresponding point Px corresponding to the points X and Y and by the points X and Y;

using the three colors forming the triangle S to create an additive linear combination; and

solving the additive linear combination for the constants ap, ax, and ay; and

(c) a viewing screen for displaying the image.

54. The color display of claim 53, where n is at least 4.

55. A method for translating a first color space signal to an n primary color space signal using a chromaticity diagram which is expressed in a two dimensional space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of the n primaries, the chromaticity diagram including a point P representing a substantially white color P, the method comprising:

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point P and two adjacent points Cx and Cy being chosen from points C1 through Cn;

mapping the first color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point P and the points X and Y, wherein a set of points Q chosen from points C1 through Cn do not form the triangle T;

determining the constants ap, ax, and ay, ap representing the contribution of the color P to the n primary color space signal, ax representing the contribution of the color corresponding to point X to the n primary color space signal, and ay representing the contribution of the color corresponding to point Y to the n primary color space signal; and

determining the contribution of the colors represented by the points Q to the color space signal based on the contribution of the colors represented by the points Q to the color P.

56. A method for translating a first color space signal to an n primary color space signal, using a chromaticity diagram which is expression a two dimensional space, where the two dimensions represent a first value and a second value of the first color space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of the n primaries, the method comprising:

mapping a point Pa on the chromaticity diagram, the point Pa representing a substantially white color Pa and being within the space bordered by the points C1 through Cn;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point Pa and a pair of adjacent points Cx and Cy, the points Cx and Cy being chosen from points C1 through Cn;

for each pair of adjacent points Cx and Cy chosen from points Cl through Cn, mapping a corresponding point Px corresponding to a color Px, the color Px being formed from the subset of the n primaries not including the primaries corresponding to Cx and Cy;

mapping the first color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point Pa and the points X and Y;

determining a triangle S substantially overlapping triangle T, triangle S being formed by the corresponding point Px corresponding to the points X and Y and by the points X and Y, wherein a set of points Q chosen from points C1 through Cn do not form the triangle S;

using the three colors forming the triangle S to create an additive linear combination;

determining the constants ap, ax, and ay, ap representing the contribution of the color represented by the corresponding point Px to the n primary color space signal, ax representing the contribution of the color corresponding to point X to the n primary color space signal, and ay representing the contribution of the color corresponding to point Y to the n-primary color space signal; and

determining the contribution of the colors represented by the points Q to the color space signal based on the contribution of the colors represented by the points Q to the color P.

57. A color display comprising:

(a) a light producing means;

(b) a controller means converting a first color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of n primaries, the controller performing at least the steps of;

mapping a point Pa on the chromaticity diagram, the point Pa representing a color Pa and being within the space bordered by the points C1 through Cn;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point Pa and a pair of adjacent points Cx and Cy, the points Cx and Cy being chosen from points C1 through Cn;

for each adjacent pair of points Cx and Cy chosen from points C1 through Cn, mapping a corresponding point Px corresponding to a color Px, the color Px being formed from the subset of the n primaries not including the primaries corresponding to Cx and Cy;

mapping the three value color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point Pa and the points X and Y;

determining a triangle S substantially overlapping triangle T, triangle S being formed by the corresponding point Px corresponding to the points X and Y and by the points X and Y;

using the three colors forming the triangle S to create an additive linear combination; and

solving the additive linear combination for the constants ap, ax, and ay; and

(iii) a viewing screen means for displaying the image.

58. A color display comprising:

(a) a light producing means;

(b) a controller means converting a first color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of n primaries, the controller performing at least the steps of;

mapping a point Pa on the chromaticity diagram, the point Pa representing a color Pa;

mapping n triangular areas on the chromaticity diagram, each triangular area having as its corner points the point Pa and a pair of points taken from Cx and Cy;

for each adjacent pair of points Cx and Cy chosen from points C1 through Cn, mapping a corresponding point Px corresponding to a color Px, the color Px being formed from the subset of the n primaries not including the primaries corresponding to Cx and Cy;

mapping the three value color space signal on the chromaticity diagram as a point D;

determining in which triangle T the point D is located, the triangle T being formed by the point Pa and the points X and Y;

determining a triangle S substantially overlapping triangle T, triangle S being formed by the corresponding point Px corresponding to the points X and Y and by the points X and Y;

using the three colors forming the triangle S to create an additive linear combination; and

solving the additive linear combination for the constant ap, representing the contribution of the color represented by the corresponding point Px to the n primary color space signal, the constant ax, representing the contribution of the color corresponding to point X to the n primary color space signal, and the constant ay, representing the contribution of the color corresponding to point Y to the n primary color space signal; and

(iii) a viewing screen means for displaying the image.

59. A color display comprising:

(a) a light producing means;

(b) a controller means converting a first color space signal to an n primary color space signal, using a chromaticity diagram which is expressed in a two dimensional space, the chromaticity diagram including n points C1 through Cn, each corresponding to one of n primaries, the controller performing at least the steps of;

mapping a point Pa on the chromaticity diagram, the point Pa representing a color Pa;

mapping n triangular areas on the chromaticity diagram each triangular area having as its corner points the point Pa and a pair of points taken from Cx and Cy;

mapping the three value color space signal on the chromaticity diagram as a point D;

defining a triangle S, triangle S being formed by a center point P and by the points X and Y;

using the three colors forming the triangle S to create an additive linear combination; and

solving the additive linear combination for the constant ax, representing the contribution of the color corresponding to point X to the n primary color space signal, and the constant ay, representing the contribution of the color corresponding to point Y to the n primary color space signal; and

(c) a viewing screen means for displaying the image.

60. A method for defining a set of primary colors comprising:

creating a set of sample colors;

for each sample color, sampling a set of wavelengths to create a vector, forming a matrix from the vectors; and

decomposing the matrix to obtain at least a set basis vectors.

61. The method of claim 60 comprising reducing the set of basis vectors to the subset of the basis vectors which are most relevant to the reconstruction of the sample colors.

62. The method of claim 60 comprising rotating the basis vectors.

63. The method of claim 60 comprising rotating the basis vectors to create a set of basis vectors which are non-orthogonal and which contain only non-negative components.

64. The method of claim 60 comprising the step of defining a set of filters, each filter corresponding to a basis vector.

65. A device for displaying image data of a plurality of colors, the device comprising a light source for producing primary colors determined using the method of claim 60.

66. The device of claim 65 comprising:

(a) a controller for determining a combination of at least one of four primary colors according to input image data for production by said light source; and

(b) a viewing screen for displaying the image data according to said combination from said controller.

67. A method for defining a set of primary colors comprising:

creating a set of sample colors;

creating a set of sample spectra representing the sample colors; and

determining, from the set of sample spectra, a set of primary colors simulating the set of sample colors.

68. The method of claim 67, comprising:

for each sample color, creating a speck vector;

forming a matrix from the vectors; and

decomposing the matrix.

69. The method of claim 67 comprising the step of defing a set of filters, each filter corresponding to a basis vector.

70. A device for displaying image data of a plurality of colors, the device comprising a light source for producing primary colors determined using the method of claim 69.

72. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light producing means for producing primary colors determined using the method of claim 67;

(b) a controller means for determining a combination of at least one of four primary colors according to input image data for production by said light source; and

(c) a viewing screen means for displaying the image data according to said combination from said controller means.

71. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light producing means for producing primary colors determined at least by the steps of creating a set of sample colors and determining a set of primary colors simulating the set of sample colors;

(b) a controller means for determining a combination of at least one of four primary colors according to input image data for production by said light source; and

(c) a viewing screen means for displaying the image data according to said combination from said controller means.

73. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light for producing primary colors determined at least by the steps of creating a set of sample colors and determining a set of primary colors simulating the set of sample colors;

(b) a controller for determining a combination of at least one of four primary colors according to input image data for production by said light source; and

(c) a viewing screen for displaying the image data according to said combination from said controller means.

74. A method for defining a set of primary colors comprising:

creating a set of sample colors;

determining a set of primary colors simulating the set of sample colors; and

defining a set of filters, each filter corresponding to a basis vector.

75. A method for defining a set of primary colors comprising:

creating a set of sample colors; and

based on a set of spectral samples representing the set of sample colors, determining a set of spectra simulating the set of sample colors.

76. A device for displaying image data of a plurality of colors, the device comprising:

(a) a light producing means for producing primary colors determined using the method of claim 75;

(b) a controller means for determining a combination of at least one of four primary colors according to input image data for production by said light source; and

(c) a viewing screen means for displaying the image data according to said combination from said controller means.

77. A device for displaying image data of a plurality of colors, the device comprising a light source for producing primary colors determined using the method of claim 75.

78. A method for defining a set of primary colors comprising:

creating a set of sample colors;

for each sample color, sampling a set of wavelengths to create a vector;