Display with ambient-adaptive backlight color
First Claim
1. An electronic device, comprising:
- a display having a backlight and a pixel array, wherein the backlight includes;
a light guide layer having first and second opposing surfaces;
light sources that emit light into the light guide layer; and
a reflector that covers the second surface of the light guide layer and that reflects the light towards the first surface; and
a color ambient light sensor that measures a color of ambient light, wherein the ambient light originates from outside of the electronic device; and
control circuitry that adjusts a color temperature of light from the light sources based on the color of ambient light to shift a white point of the display between a warm white and a cool white.
1 Assignment
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Accused Products
Abstract
An electronic device may be provided with a display having a backlight with light sources of different colors. The electronic device may include a color ambient light sensor that measures the color of ambient light and control circuitry that adjusts the color of light emitted from the backlight based on the color of ambient light. The light sources may include at least first and second light-emitting diodes that emit light having different color temperatures. The control circuitry may adjust the intensity of light emitted from the first light-emitting diode relative to the intensity of light emitted from the second light-emitting diode to produce a backlight color that more closely matches the color of ambient light. The first and second light-emitting diodes may include an ultraviolet light-emitting diode die and a blue light-emitting diode die that are mounted in a common semiconductor package.
15 Citations
20 Claims
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1. An electronic device, comprising:
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a display having a backlight and a pixel array, wherein the backlight includes; a light guide layer having first and second opposing surfaces; light sources that emit light into the light guide layer; and a reflector that covers the second surface of the light guide layer and that reflects the light towards the first surface; and a color ambient light sensor that measures a color of ambient light, wherein the ambient light originates from outside of the electronic device; and control circuitry that adjusts a color temperature of light from the light sources based on the color of ambient light to shift a white point of the display between a warm white and a cool white. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic device, comprising:
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a display having a backlight and having a pixel array that receives light from the backlight, wherein the backlight comprises light sources that generate the light and wherein the light generated by the light sources is the only light received by the pixel array from the backlight, wherein the light sources include first and second light sources, and wherein the first light source produces light having a first color temperature and the second light source produces light having a second color temperature that is higher than the first color temperature; a color ambient light sensor that measures a color of ambient light, wherein the ambient light originates from outside of the electronic device; and control circuitry that adjusts a color temperature of the light from the light sources based on the color of ambient light by adjusting the intensity of light produced by the first light source relative to the intensity of light produced by the second light source to shift a color cast of the display between a warm color cast and a cool color cast. - View Dependent Claims (12, 13, 14, 15)
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16. An electronic device, comprising:
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a display having a backlight and having a pixel array that receives light from the backlight, wherein the backlight includes a light guide layer, first and second light sources that emit the light into the light guide layer, and a reflective material covering a lower surface of the light guide layer, and wherein the first light source comprises an ultraviolet light-emitting diode die and the second light source comprises a blue light-emitting diode die; a color ambient light sensor that measures a color of ambient light, wherein the ambient light originates from outside of the electronic device; and control circuitry that adjusts a color temperature of the light from the backlight based on the color of ambient light by adjusting the intensity of light emitted from the first light source relative to the intensity of light emitted from the second light source to shift a white point of the display between a warm white and a cool white. - View Dependent Claims (17, 18, 19, 20)
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Specification