Display device with reflective sheet having color converting light patterns

Patent metadata

Field	Value
Publication number	US-12147120-B2
Application number	US-202218280117-A
Country	US
Kind code	B2
Filing date	Feb 16, 2022
Priority date	May 24, 2021
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A display device of the present disclosure includes: a display panel; a frame which is positioned in a rearward direction of the display panel, and to which the display panel is coupled; a substrate which is positioned between the display panel and the frame, and fixed to the frame; a plurality of light sources mounted on the substrate to form a row and a column; a reflective sheet which is positioned on the substrate, and has a plurality of holes through which each of the plurality of light sources passes; and a light pattern which is formed on the reflective sheet, and converts a color of a light provided by the plurality of light sources, wherein the reflective sheet includes: a first hole positioned adjacent to an edge of the reflective sheet; a second hole which is positioned adjacent to the first hole and positioned farther than the first hole from the edge of the reflective sheet; a first area positioned around the first hole; and a second area positioned around the second hole, wherein the light pattern includes: a first light pattern positioned in the first area; and a second light pattern positioned in the second area, wherein an area of the first light pattern is larger than an area of the second light pattern.

First claim

The invention claimed is:

1. A display device comprising:
a display panel;
a frame coupled at a rear of the display panel;
a substrate coupled to the frame and positioned between the display panel and the frame;
a plurality of light sources mounted on the substrate;
a reflective sheet at a front of the substrate and comprising a plurality of holes corresponding to the plurality of light sources; and
a plurality of light patterns formed on the reflective sheet and configured to convert a color of light provided by the plurality of light sources,
wherein:
the reflective sheet comprises a first area positioned adjacent to an edge of the reflective sheet and a second area positioned further inward from the first area;
a first hole of the plurality of holes positioned in the first area; and
a second hole of the plurality of holes positioned in the second area,
the plurality of light patterns comprises a first light pattern positioned in the first area and a second light pattern positioned in the second area,
the first light pattern comprises a first plurality of dots and a curved line disposed along a circumference of the first hole,
the second light pattern comprises a second plurality of dots disposed along a circumference of the second hole, and
the curved line is positioned between the first hole and the edge of the reflective sheet and the first plurality of dots are positioned opposite to the curved line with respect to the first hole.

2. The display device of claim 1 , further comprising an optical sheet which is positioned between the plurality of light sources and the display panel, and comprises a green-based phosphor and a red-based phosphor.

3. The display device of claim 1 , wherein the first area comprises a first portion and a second portion,
wherein the first portion of the first area is disposed along a first edge of the reflective sheet and the second portion of the first area is disposed along an adjacent second edge of the reflective sheet to form a corner of the reflective sheet between the first edge and the second edge,
wherein the first hole is one of a plurality of first portion holes positioned in the first portion, and
wherein the second portion comprises a plurality of second portion holes.

4. The display device of claim 3 , wherein the first light pattern further comprises a second portion curved line disposed along a circumference of a second portion hole of the plurality of second portion holes.

5. The display device of claim 4 , wherein a length of the second portion curved line is longer than a length of the curved line disposed along a circumference of the first hole.

6. The display device of claim 4 , wherein the second portion curved line is disposed along more than half of the circumference of the second portion hole.

7. The display device of claim 6 , wherein an open circumferential portion between ends of the second portion curved line faces toward the second edge of the reflective sheet.

8. The display device of claim 7 , wherein open circumferential portions of second portion curved lines corresponding to each of the plurality of second portion holes in the second portion face a same direction toward the second edge of the reflective sheet.

9. The display device of claim 3 , wherein the reflective sheet further comprises:
a third area positioned further inward from the second area and comprising a third light pattern of the plurality of light patterns corresponding to holes in the third area; and
a fourth area positioned further inward from the third area and comprising a fourth light pattern of the plurality of light patterns corresponding to holes in the fourth area,
wherein the third light pattern and the fourth light pattern are different.

10. The display device of claim 9 , wherein the third light pattern and the fourth light pattern are each comprised of dots disposed around circumferences of the holes in the third area and fourth area, respectively.

11. The display device of claim 10 , wherein a number of dots disposed around a hole in the fourth area is less than a number of dots disposed around a hole in the third area.

Assignees

• Lg Electronics Inc

Inventors

• Park Jihee
• Yoon Jihye
• LEE Kilhoon
• Jeong Kiryong
• Kim Keonwoo
• Jung Nayeon

Classifications

• G02F1/133609

  including means for improving the color mixing, e.g. white · CPC title

• G02F1/133611 Primary

  including means for improving the brightness uniformity · CPC title

• G02F1/133606 Primary

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133608

  including particular frames or supporting means · CPC title

• G02F1/133605 Primary

  including specially adapted reflectors · CPC title