Super slim LCD backlight device using uniforming chamber
First Claim
1. A backlight device for a LCD display, comprising:
- a plurality of LEDs; and
a uniforming member, said uniforming member comprising at least a light emitting plane and a light entering plane, said light emitting plane facing the back of said LCD display'"'"'s panel, said light emitting plane allowing a portion of lights passing through from inside said uniforming member;
wherein lights emitted from said LEDs are mixed and uniformed by undergoing a plurality of times of reflections inside said uniforming member, and then projected toward the back of said LCD display'"'"'s panel via said light emitting plane.
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Abstract
A backlight device for LCD displays is disclosed herein. The backlight device contains multiple LEDs as light source and a uniforming chamber positioned between the LEDs and the LCD panel. Lights emitted from the LEDs undergo multiple times of total reflection by the inner walls of the uniforming chamber to produce a highly uniform planar light, regardless of the length of their usage period, the differences of LEDs'"'"' hues and brightness, and whether some LEDs are failed. The backlight device does not require the diffusion plates and prism plates, which not only reduces cost but also avoids the luminous flux loss. Also, the backlight device could achieve the slimmest thickness without sacrificing cost, heat dissipation, and power consumption.
37 Citations
32 Claims
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1. A backlight device for a LCD display, comprising:
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a plurality of LEDs; and
a uniforming member, said uniforming member comprising at least a light emitting plane and a light entering plane, said light emitting plane facing the back of said LCD display'"'"'s panel, said light emitting plane allowing a portion of lights passing through from inside said uniforming member;
wherein lights emitted from said LEDs are mixed and uniformed by undergoing a plurality of times of reflections inside said uniforming member, and then projected toward the back of said LCD display'"'"'s panel via said light emitting plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification