LED backlight system for LCD displays
First Claim
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1. A backlight assembly for a LCD display comprising:
- one or more first white LEDs having a first color temperature and producing a first light output;
one or more second white LEDs having a second color temperature other than the first color temperature and producing a second light output;
a backlight substrate coupled to the one or more first white LEDs and the one or more second white LEDs; and
wherein the first light output and the second light output optically mix to produce a combined backlight output having a desired luminance and chrominance.
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Abstract
A LCD display comprises a backlight assembly that includes a backlight substrate, one or more first white LEDs coupled to the backlight substrate and configured to produce a first light output, and one or more second white LEDs coupled to the backlight substrate and configured to produce a second light output. A light integration unit is coupled to the backlight assembly and configured to produce a combined output from the first light output and the second light output, the combined output having a desired luminance and chrominance. A LCD assembly is coupled to the light integration unit.
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Citations
20 Claims
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1. A backlight assembly for a LCD display comprising:
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one or more first white LEDs having a first color temperature and producing a first light output;
one or more second white LEDs having a second color temperature other than the first color temperature and producing a second light output;
a backlight substrate coupled to the one or more first white LEDs and the one or more second white LEDs; and
wherein the first light output and the second light output optically mix to produce a combined backlight output having a desired luminance and chrominance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A LCD display comprising:
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a backlight assembly comprising;
a plurality of first white LEDs coupled to a backlight substrate and configured to produce a first light output comprising a first color temperature; and
a plurality of second white LEDs coupled to the backlight substrate and configured to produce a second light output comprising a second color temperature;
a light integration unit coupled to the backlight assembly and configured to produce a combined output from the first light output and the second light output; and
a LCD assembly coupled to the light integration unit. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for illuminating a LCD display comprising:
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generating a first output from a first white LED, the first output having a color temperature;
generating a second output from a second white LED, the second output having a color temperature that is different than the color temperature of the first output;
optically mixing the first output and the second output in a backlight cavity to produce a combined output having a desired chrominance and luminance; and
directing the combined output through an LCD assembly. - View Dependent Claims (20)
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Specification