Spotlight for shooting films and videos

• US 20090046453A1
• Filed: 05/11/2006
• Published: 02/19/2009
• Est. Priority Date: 05/11/2005
• Status: Active Grant

• Current Assignee: Arnold & Richter Cine Technik GmbH & Co., Betriebs KG (Stahl Beteiligungs- GmbH)
• Original Assignee: Arnold & Richter Cine Technik GmbH & Co., Betriebs KG (Stahl Beteiligungs- GmbH)
• Inventors: Kramer, Regine
• Granted Patent: US 7,744,242 B2
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21W 2131/406 for theatres, stages or film studios
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/22 using optical feedback
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A spotlight for shooting films and videos is provided. The spotlight comprising light-emitting diodes (LEDs) arranged on a light-emitting surface, of which color LEDs emit different LED colors (R, G, A, B, Ye) and provide luminous flux portions for a color mixture. At least one LED comprises a luminescent LED. The spotlight further comprising a device for setting the luminous flux portion emitted by the LEDs, which device drives the LEDs at least in groups. At least one color LED emits the LED color “blue” or “cyan”, and the luminescent LED comprises a yellow-green, daylight-white, neutral-white or warm-white luminescent LED, which covers at least a portion of the color LEDs with the exception of the color LED emitting the LED color “blue” or “cyan”.

Claims

1-50. -50. (canceled)

51. A spotlight for use in shooting films and videos, said spotlight comprising:

light-emitting diodes (LEDs) arranged on a light-emitting surface, wherein said LEDs emit different LED colors comprising the colors red, green, amber, blue and yellow and provide luminous flux portions for a color mixture, and wherein at least one LED comprises a luminescent LED; and

a device for setting the luminous flux portion emitted by the LEDs, which device drives the LEDs at least in groups, wherein at least one color LED emits the LED color blue or cyan, and wherein the luminescent LED comprises a yellow-green, daylight-white, neutral-white or warm-white luminescent LED, which covers at least a portion of the color LEDs with the exception of the color LED emitting the LED color blue or cyan.

52. The spotlight of claim 51, wherein the individual color LEDs are arranged on a substrate with chip-on-board technology.

53. The spotlight of claim 52, wherein the individual color LEDs are embedded in microreflectors.

54. The spotlight of claim 51, wherein the LEDs are combined to form an LED module and the light-emitting surface of the spotlight comprises an LED board with an LED module or an array of LED modules.

55. The spotlight of claim 54, wherein the spotlight has a plurality of LEDs boards.

56. The spotlight of claim 54, wherein the LED modules have a predetermined number of color LEDs and luminescent LEDs, at least one color LED being provided for each LED color.

57. The spotlight of claim 51, wherein a luminescent material layer of the luminescent LED covers chips of the LEDs emitting a color red, green, orange, yellow-orange or yellow wavelength range which adjoin a chip of the luminescent LED, and in that one or a plurality of color LEDs emitting a blue or cyan-colored wavelength range are arranged around or alongside the luminescent material layer.

58. The spotlight of claim 51, wherein the LED modules have in each case at least five different LEDs, of which

one LED is embodied as a yellow-green or white luminescent LED,

one LED is embodied as a monochrome cyan-colored or blue color LED,

one LED is embodied as a monochrome green color LED and

two LEDs are embodied as different monochrome color LEDs with a red, orange, yellow-orange or yellow LED color (R, A, Ye).

59. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome blue color LED having a peak wavelength of 430 nm-480 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 nm,

a monochrome amber-colored color LED having a peak wavelength of 610 nm-640 nm, and

a monochrome red color LED having a peak wavelength of 630 nm-660 nm.

60. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome cyan-colored color LED having a peak wavelength of 480 nm-515 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 nm,

a monochrome yellow color LED having a peak wavelength of 580 nm-610 nm, and

a monochrome amber-colored color LED having a peak wavelength of 610 nm-640 nm.

61. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome cyan-colored color LED having a peak wavelength of 480 nm-515 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 nm,

a monochrome yellow color LED having a peak wavelength of 580 nm-610 nm,

a monochrome amber-colored color LED having a peak wavelength of 610 nm-640 nm, and

a monochrome blue color LED having a peak wavelength of 430 nm-480 nm.

62. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome cyan-colored color LED having a peak wavelength of 480 nm-515 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 nm,

a monochrome yellow color LED having a peak wavelength of 580 nm-610 nm, and

a monochrome red color LED having a peak wavelength of 630 nm-660 nm.

63. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome cyan-colored color LED having a peak wavelength of 480 nm-515 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 mm,

a monochrome yellow color LED having a peak wavelength of 580 nm-610 nm,

a monochrome red color LED having a peak wavelength of 630 nm-660 nm, and

a monochrome blue color LED having a peak wavelength of 430 nm-480 nm.

64. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome cyan-colored color LED having a peak wavelength of 480 nm-515 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 nm,

a monochrome amber-colored color LED having a peak wavelength of 610 nm-640 nm, and

a monochrome red color LED having a peak wavelength of 630 nm-660 nm.

65. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome cyan-colored color LED having a peak wavelength of 480 nm-515 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 nm,

a monochrome amber-colored color LED having a peak wavelength of 610 nm-640 nm,

a monochrome red color LED having a peak wavelength of 630 nm-660 nm, and

a monochrome blue color LED having a peak wavelength of 430 nm-480 nm.

66. The spotlight of claims 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome blue color LED having a peak wavelength of 430 nm-480 nm,

a monochrome green color LED having a peak wavelength of 505 nm-535 nm,

a monochrome yellow color LED having a peak wavelength of 580 nm-610 nm, and

a monochrome red color LED having a peak wavelength of 630 nm-660 nm.

67. The spotlight of claim 51, wherein the LED modules have

a yellow-green or white luminescent LED,

a monochrome blue color LED having a peak wavelength of 430 nm-480 nm,

a monochrome red color LED having a peak wavelength of 630 nm-660 mm.

68. The spotlight of claim 51, wherein the spotlight is designed to simulate a light source and/or light color selected by a user.

69. The spotlight of claim 54, wherein at least one measuring device is arranged between the LED board and a front side of the spotlight.

70. The spotlight of claim 69, wherein the measuring device detects the radiation intensity of the LEDs and is embodied as a calorimeter, RGB sensor, V(λ

) sensor or light sensor.

71. The spotlight of claim 70, wherein the measuring device is formed by at least five light sensors having different spectral sensitivities.

72. The spotlight of claim 70, wherein the measuring device detects the radiation intensity of the LEDs continuously or at predetermined time intervals.

73. The spotlight of claim 69, wherein the measuring device is regulated to a constant temperature.

74. The spotlight of claim 69, wherein a representative portion of each LED color is coupled into the light-sensitive surface of the measuring device.

75. The spotlight of claim 69, wherein a diffusing screen fitted in front of an array of LED modules collects light and couples part of the light into the measuring device via an opening in a peripheral reflective coating.

76. The spotlight of claim 69, wherein at least one LED module is a monitor LED module and is arranged at a thermally representative location of the array of LED modules and is used for illuminating the measuring device and part of a radiation emitted by the monitor LED module is coupled into the measuring device.

77. The spotlight of claim 76, wherein the light emitted by the monitor LED module irradiates onto a diffuser lamina and is reflected or guided onto the measuring device by the diffuser lamina.

78. The spotlight of claim 77, wherein the light is guided onto the measuring device by the diffuser lamina via an optical waveguide.

79. The spotlight of claim 77, wherein the diffuser lamina is arranged at the underside of a transparent screen arranged above the light-emitting surface of the spotlight.

80. The spotlight of claim 77, wherein the diffuser lamina is arranged in a capsule, which is placed onto one side of the light-emitting surface of the spotlight and which surrounds the monitor LED module and the measuring receiver.

81. The spotlight of claim 80, wherein the capsule is light-tight.

82. The spotlight of claim 80, wherein the monitor LED module, the measuring receiver and the capsule are arranged on the underside of the light-emitting surface of the spotlight.

83. The spotlight of claim 77, wherein the diffuser lamina has a reflective coating on a side remote from the measuring receiver.

84. The spotlight of claim 76, wherein the measuring device is situated at that end of a capsule which is remote from the monitor LED module, said capsule being arranged above the monitor LED module on a top side or underside of the light-emitting surface of the spotlight.

85. The spotlight of claim 51, wherein the LEDs are side-emitting LEDs.

86. The spotlight of claim 85, wherein the LEDs produce a constant luminance distribution can be produced on a surface illuminated by the LEDs.

87. The spotlight of claim 85, wherein a light guiding plate on the light-emitting surface of the spotlight, and the light emitted by the side-emitting LEDs is mixed by the light guiding plate.

88. The spotlight of claim 87, wherein the light guiding plate comprises a peripheral reflective coating.

89. The spotlight of claim 88, wherein an opening is situated in the peripheral reflective coating, wherein the measuring device is arranged in said opening.

90. The spotlight of claim 69, wherein the measurement of a radiation intensity of the individual LED colors is initiated manually.

91. The spotlight of claim 69, wherein an optical and/or acoustic signal device indicates the deviation of a present setting from a predetermined desired value.

92. The spotlight of claim 69 further comprising a user interface, wherein the desired color temperature and/or the desired color locus of the spotlight is set via the user interface.

93. The spotlight of claim 69 further comprising a user interface, wherein a color correction which emulates attached color correction filters, and/or a light color which emulates color filters, is selected via the user interface for simulation by the spotlight.

94. The spotlight of claim 51, wherein the spotlight is designed to adapt a color temperature depending on the brightness of the spotlight in a dimming mode.

101. The spotlight of claim 57 wherein said LEDs further emit the colors orange and yellow-orange and wherein said luminescent layer also covers chips of the LEDs emitting the colors orange and yellow-orange.

95. A method for setting the color characteristics emitted by a spotlight for shooting films and videos with light-emitting diodes (LEDs) arranged on a light-emitting surface, of which color LEDs emit different LED colors and provide luminous flux portions for a color mixture, and at least one LED comprises a luminescent LED, wherein the spotlight comprises a device for setting the luminous flux portion emitted by the LEDs, which device drives the LEDs at least in groups, wherein at least one color LED emits an LED color blue or cyan, and in that the luminescent LED comprises a yellow-green, daylight-white, neutral-white or warm-white luminescent LED, which covers at least a portion of the color LEDs with the exception of the color LED emitting the LED color blue or cyan, wherein

after the spotlight has been switched on, radiation components of the LED colors red, green, amber, blue and yellow (R, G, A, B, Ye) are measured,

during operation, present RGB or intensity values of the LED colors R, G, A, B, Ye are measured continuously or at predetermined intervals, and

the radiation intensity of the LED colors R, G, A, B, Ye is readjusted taking account of the present RGB or intensity values determined for each LED color R, G, A, B, Ye.

96. The method of claim 95, wherein a present color locus is calculated from the present RGB or intensity values of the total radiation of the LED colors R, G, A, B, Ye and, in the event of deviations from a target color locus, the present RGB or intensity values of the individual LED colors are measured, whereupon the radiation intensity of the LED colors R, G, A, B, Ye is readjusted taking account of the present RGB or intensity values determined for each LED color R, G, A, B, Ye.

97. The method claim 95, wherein the radiation components of the LED colors R, G, A, B, Ye are determined by successively activating the individual LED colors R, G, A, B, Ye one shortly after another and measuring the RGB or intensity values of the individual LED colors R, G, A, B, Ye.

98. The method of claim 95, wherein the radiation components of the LED colors R, G, A, B, Ye are determined by successively activating two or at most three LED colors (R, G, A, B, Ye), measuring the RGB or intensity values and calculating the intensities of the individual LED colors R, G, A, B, Ye.

99. The method of claim 95, wherein the radiation components of the LED colors R, G, A, B, Ye are determined by measuring the total radiation of all the LED colors. R, G, A, B, Ye successively switching off individual LED colors R, G, A, B, Ye, measuring the RGB or intensity values of the remaining LED colors R, G, A, B, Ye and subtracting the two values thus measured in order to determine the RGB or intensity values of the LED color R, G, A, B, Ye respectively switched off.

100. The method of claim 95, wherein the radiation components of the LED colors R, G, A, B, Ye are determined by measuring the total radiation of all the LED colors R, G, A, B, Ye by means of light sensors having different spectral sensitivities, wherein the number of light sensors correspond to the number of LED colors used.