BACKLIGHT ASSEMBLY FOR A DISPLAY DEVICE
First Claim
Patent Images
1. A backlight assembly for a display device comprising:
- a light source;
a light filter to filter light from the light source;
a light guide to receive light from the light filter, the light guide to provide background light for a display device.
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Abstract
An apparatus for an improved backlight display is described. The invention includes a dimmable light source which directs light through a filter before the light from a light source is distributed by a light guide.
22 Citations
19 Claims
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1. A backlight assembly for a display device comprising:
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a light source;
a light filter to filter light from the light source;
a light guide to receive light from the light filter, the light guide to provide background light for a display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A light source to provide light to a backlight assembly comprising:
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a transparent enclosure to confine a fluorescent gas;
a first central electrode and a second central electrode within the transparent enclosure, the first and second central electrode to provide an electric potential to excite the fluorescent gas at high light output levels; and
a first dimming electrode positioned outside the transparent enclosure, the difference in the electric potential between the first dimming electrode and the first central electrode to excite the fluorescent gas at low light output levels. - View Dependent Claims (10, 11, 12, 13)
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14. A display device comprising:
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a light source;
a light filter to receive light from the light source and output filtered light;
a light guide to distribute the filtered light across a backplane of the display device; and
an electronically controllable medium to generate images, the electronically controllable medium illuminated by light from the light guide. - View Dependent Claims (15, 16)
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17. A display device comprising:
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a first source of light coupled to a day light guide to provide a high level of background lighting for the display device;
a second source of light coupled to a filter, the filter transferring light to a night light guide to provide a low level of background lighting for the display device; and
a display screen to receive light from the day light guide when a switch is in a first position, the display screen to receive light from the night light guide when the switch is in a second position. - View Dependent Claims (18, 19)
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Specification