Backlight unit and liquid crystal display device including the same
AssigneeLG Display Co., Ltd.
InventorsSe-Hyun Park, Min-Jae Kang, Ji-Su Yoon, Kyu-Hwan Lee
Life of this patent
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Abstract
The present disclosure is directed to a liquid crystal display device including a display panel including a red pixel, a green pixel, and a blue pixel; and a backlight unit which emits light to the display panel. The backlight unit includes a light source which outputs a first color light; a color conversion layer which is configured to convert the first color light into a second color light; an optical sheet which diffuses or condenses the second color light; and an air gap formed between the color conversion layer and the optical sheet.
Claims17
A liquid crystal display device, comprising:
- a display panel including a red pixel, a green pixel, and a blue pixel;
- and
- a backlight unit configured to emit light to the display panel, the backlight unit including:
- a light source configured to output a first color light;
- a color conversion layer configured to convert the first color light into a second color light;
- an optical sheet configured to diffuse the second color light;
- and
- an air gap between the color conversion layer and the optical sheet,
- wherein the optical sheet includes:
- a first light condensing portion including a first support layer and a first lens layer located above the first support layer;
- a second light condensing portion including a second support layer and a second lens layer located above the second support layer;
- and
- a diffusion portion located below the first light condensing portion, the diffusion portion including a third support layer and a diffusion layer located above the third support layer,
- wherein the first and second lens layers include first and second light condensing patterns, the first and second light condensing patterns have trapezoidal column shapes having widths which become narrower as a distance from the first and second support layers increases, and the first and second light condensing patterns have trapezoidal cross sections and top surfaces, and
- wherein reflection patterns are positioned on the top surfaces.
A backlight unit, comprising:
- a light source configured to output a first color light;
- a color conversion layer configured to convert the first color light into a second color light, the first color light including blue light, and the second color light including green light;
- an optical sheet configured to diffuse the second color light;
- and
- an air gap between the color conversion layer and the optical sheet,
- wherein the optical sheet includes:
- a first light condensing portion including a first support layer and a first lens layer located above the first support layer;
- a second light condensing portion including a second support layer and a second lens layer located above the second support layer;
- and
- a diffusion portion located below the first light condensing portion, the diffusion portion including a third support layer and a diffusion layer located above the third support layer,
- wherein the first and second lens layers include first and second light condensing patterns, the first and second light condensing patterns have trapezoidal column shapes having widths which become narrower as a distance from the first and second support layers increases, and the first and second light condensing patterns have trapezoidal cross sections and top surfaces, and
- wherein reflection patterns are positioned on the top surfaces.
Dependencies are inferred from the claim text.