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US 2006/0221636 A1Published application
Surface illuminator and liquid crystal display having the same
AssigneeSharp Kabushiki Kaisha
InventorsNoriyuki Ohashi, Tetsuya Hamada
Life of this patent
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Abstract
The invention provides a surface illuminator capable of achieving high display quality by employing an array of discrete light sources constituted by a plurality of LEDs and a liquid crystal display having the same. The surface illuminator includes an LED module which is a plurality of LEDs alternately and discretely provided along a light entrance surface and a color irregularity correcting resistor which is connected in parallel with a predetermined LED at an end of the LED module and which provides a bypass for a current supplied to the LED.
Claims29
A surface illuminator comprising:
- a light exit region which spreads in the form of a plane and from which light exits;
- a light guide region for guiding light to the light exit region;
- a light entrance surface through which light enters the light guide region;
- a reflective surface extending from an end of the light entrance surface and reflecting light in the light guide region;
- an LED module including a plurality of LEDs alternately and discretely provided along the light entrance surface;
- and a color irregularity correcting resistor connected in parallel with predetermined one or more of the LEDs.
3 more elements
A surface illuminator comprising:
- a light exit region which spreads in the form of a plane and from which light exits;
- a light guide region for guiding light to the light exit region;
- a light entrance surface through which light enters the light guide region;
- a reflective surface extending from an end of the light entrance surface and reflecting light in the light guide region;
- and
- an LED module including a plurality of LEDs alternately and discretely provided along the light entrance surface, at least one of the LEDs at an end of the module on the side of the reflective surface being separately driven;
3 more elements
A surface illuminator comprising:
- a light exit region which spreads in the form of a plane and from which light exits;
- a light guide region for guiding light to the light exit region;
- a light entrance surface through which light enters the light guide region;
- a reflective surface extending from an end of the light entrance surface and reflecting light in the light guide region;
- and
- an LED module including a plurality of LEDs alternately and discretely provided along the light entrance surface, at least one white LED being provided at an end of the module on the side of the reflective surface.
3 more elements
A surface illuminator comprising:
- a light exit region which spreads in the form of a plane and from which light exits;
- a light guide region for guiding light to the light exit region;
- a light entrance surface through which light enters the light guide region;
- a reflective surface extending from an end of the light entrance surface and reflecting light in the light guide region;
- and
- an LED module including LEDs in three colors, i.e., yellow, cyan, and magenta provided at an end thereof on the side of the reflective surface and red, green, and blue LEDs alternately and discretely provided along the light entrance surface starting at the fourth place from the end.
3 more elements
A surface illuminator comprising:
- a light exit region which spreads in the form of a plane and from which light exits;
- a light guide region for guiding light to the light exit region;
- a light entrance surface through which light enters the light guide region;
- a reflective surface extending from an end of the light entrance surface and reflecting light in the light guide region;
- and
- an LED module including LEDs in two colors among three colors, i.e., yellow, cyan, and magenta provided at an end thereof on the side of the reflective surface, one red or blue LED provided in the third place from the end, and red, green, and blue LEDs alternately and discretely provided along the light entrance surface starting at the fourth place from the end.
3 more elements
A surface illuminator comprising:
- a light exit region which spreads in the form of a plane and from which light exits;
- a light guide region for guiding light to the light exit region;
- a light entrance surface through which light enters the light guide region;
- a reflective surface extending from an end of the light entrance surface and reflecting light in the light guide region;
- an LED module including a plurality of LEDs alternately and discretely provided along the light entrance surface;
- and a color irregularity correcting LED provided at each of four corners of the light exit region.
3 more elements
Dependencies are inferred from the claim text.