Backlight unit and display device
AssigneeLG Display Co., Ltd.
InventorsMyungJoon PARK, Kyuhwan LEE
Life of this patent
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Abstract
A backlight unit for a display device includes a light path control pattern disposed over a light source and including portions having different types of reflective characteristic and a reflective layer disposed on a substrate where the light source is mounted and including portions having different types of reflective characteristic, a light guide distance of a light emitted from the light source can be increased and a light uniformity can be maintained, so that as a light can be supplied to each area evenly while increasing a distance between the light sources and reducing the number of the light sources, an image quality of the backlight unit can be enhanced.
Claims19
A display device, comprising:
- a display panel;
- and
- a backlight unit supplying light to the display panel,
- wherein the backlight unit comprises,
- a plurality of light sources disposed on a substrate;
- a plurality of first light path control patterns located over the plurality of light sources, corresponding to each of the plurality of light sources, and among reflected light by the first light path control pattern, a ratio of specularly reflected light is smaller than a ratio of diffusely reflected light;
- a plurality of second light path control patterns located around each of the plurality of first light path control patterns, and among reflected light by the second light path control pattern, a ratio of specularly reflected light is greater than a ratio of diffusely reflected light;
- a first reflective layer disposed on at least a part of an area other than an area where the plurality of light sources are disposed on the substrate;
- and
- a second reflective layer disposed on a partial area on the first reflective layer.
The display device of clam 1, wherein a portion of the second light path control pattern overlaps with a portion of the first reflective layer.
A backlight unit, comprising:
- a plurality of light sources;
- and
- a plurality of light path control patterns located over the plurality of light sources, and corresponding to each of the plurality of light sources,
- wherein each of the plurality of light path control patterns comprises,
- a first part disposed on an area including an area overlapping the light source, and among a reflected light by the first part, a ratio of specularly reflected light is smaller than a ratio of diffusely reflected light;
- and
- a second part disposed around the first part, and among reflected light by the second part, a ratio of specularly reflected light is greater than a ratio of diffusely reflected light.
A backlight unit, comprising:
- a plurality of light sources disposed on a substrate;
- a plurality of light path control patterns located over the plurality of light sources, and corresponding to each of the plurality of light sources;
- a first reflective layer disposed on at least a part of an area other than an area where the plurality of light sources are disposed on the substrate, and comprising a plurality of first holes corresponding to each of the plurality of light sources;
- and
- a second reflective layer disposed on a partial area on the first reflective layer, comprising a plurality of second holes corresponding to each of the plurality of light sources, and a size of each of the plurality of second holes is greater than a size of each of the plurality of first holes.
Dependencies are inferred from the claim text.