DISPLAY APPARATUS

• US 20200133062A1
• Filed: 10/22/2019
• Published: 04/30/2020
• Est. Priority Date: 10/24/2018
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Hyung Jin, JEON, Wook Jae, LEE, Young Chol, LEE, Ju Hyun, LEE, Tae Young, CHAE, Seung Hun, CHOI, Jun Sung
• Granted Patent: US 10,942,391 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133524 Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 2201/08 light absorbing layer
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

There is provided a display apparatus with an improved viewing angle. The display apparatus includes a display panel configured to receive light from a light source module, wherein the display panel includes: a liquid crystal panel; a first polarizing plate positioned on a rear side of the liquid crystal panel and a second polarizing plate positioned on a front side of the liquid crystal panel; and an optical layer positioned on a front surface of the second polarizing plate, wherein the optical layer includes: a resin layer having a first refractive index, and including an accommodating groove in which a light adjusting portion is disposed, the resin layer further including a light refractive pattern protruding toward a rear direction of the display panel; and an adhesive layer having a second refractive index different from the first refractive index, and bonding the resin layer with the second polarizing plate.

Claims

1. A display apparatus including a display panel configured to receive light from a light source module, wherein the display panel comprises:

a liquid crystal panel;

a first polarizing plate positioned on a rear side of the liquid crystal panel and a second polarizing plate positioned on a front side of the liquid crystal panel; and

an optical layer positioned on a front surface of the second polarizing plate,

wherein the optical layer comprises;

a resin layer having a first refractive index, the resin layer including an accommodating groove in which a light adjusting portion is disposed, the resin layer further including a light refractive pattern protruding toward a rear direction of the display panel; and

an adhesive layer having a second refractive index different from the first refractive index, and bonding the resin layer with the second polarizing plate.

2. The display apparatus according to claim 1, wherein the resin layer is a single layer.

3. The display apparatus according to claim 1, wherein the light adjusting portion comprises a light refracting portion having a third refractive index and configured to refract a part of light inclined with respect to a reference line extending in a normal direction of the light refractive pattern of light entering the light refractive pattern,

wherein the light refracting portion is disposed in at least one area of the accommodating groove.

4. The display apparatus according to claim 3, wherein the first refractive index of the resin layer is different by 0.1 or more from the second refractive index of the adhesive layer and the third refractive index of the light refracting portion.

5. The display apparatus according to claim 3, wherein the light adjusting portion further comprises a light absorbing portion configured to absorb the other part of the light inclined with respect to the reference line extending in the normal direction of the light refractive pattern of the light entering the light refractive pattern, and

the light refracting portion and the light absorbing portion are disposed in the accommodating groove, wherein the light refracting portion is positioned on a front side of the light absorbing portion.

6. The display apparatus according to claim 5, wherein the light absorbing portion includes at least one of a black resin, a carbon black, a mixture of metal particles, graphite powder, gravure ink, black spray, or black enamel.

7. The display apparatus according to claim 1, wherein the resin layer comprises a first optical surface opposite the adhesive layer and in which the accommodating groove and the light refractive pattern are provided.

8. The display apparatus according to claim 7, wherein the accommodating groove and the light refractive pattern are arranged alternately along a left-right direction of the display panel.

9. The display apparatus according to claim 1, wherein the accommodating groove includes a first accommodating groove and a second accommodating groove neighboring the first accommodating groove, and

the light refractive pattern positioned between the first accommodating groove and the second accommodating groove includes a first vertex located at an edge of the first accommodating groove being in contact with the adhesive layer, a second vertex located at an edge of the second accommodating groove being in contact with the adhesive layer, and a third vertex located between the first vertex and the second vertex and located behind the first vertex and the second vertex.

10. The display apparatus according to claim 9, wherein the light refractive pattern includes a cross section having a shape of a triangle.

11. The display apparatus according to claim 9, wherein a line passing one of the first vertex and the second vertex and the third vertex forms an angle of 10 degrees to 40 degrees with respect to an angle reference line passing one of the first vertex and the second vertex and extending in a left-right direction of the display panel.

12. The display apparatus according to claim 7, wherein the resin layer further includes a second optical surface facing a front direction of the display panel and being an opposite surface of the first optical surface, and

the display panel further includes a protective film positioned on the second optical surface of the resin layer.

13. A display apparatus including a display panel configured to receive light from a light source module, wherein the display panel comprises:

a liquid crystal panel;

a first polarizing plate positioned on a rear side of the liquid crystal panel and a second polarizing plate positioned on a front side of the liquid crystal panel; and

an optical layer positioned on a front surface of the second polarizing plate,

wherein the optical layer comprises a resin layer having a first refractive index, the resin layer including an accommodating groove in which a light adjusting portion is disposed, and

the light adjusting portion comprises a light refracting portion having a second refractive index different from the first refractive index and configured to refract a part of light entering the optical layer, the light refracting portion being disposed in at least one area of the accommodating groove.

14. The display apparatus according to claim 13, wherein a difference between the first refractive index of the resin layer and the second refractive index of the light refracting portion is 0.1 or more.

15. The display apparatus according to claim 13, wherein the light adjusting portion further comprises a light absorbing portion configured to absorb the other part of the light entering the optical layer, and

the light refracting portion and the light absorbing portion are disposed in the accommodating groove, wherein the light refracting portion is positioned on a front side of the light absorbing portion.

16. The display apparatus according to claim 15, wherein the light absorbing portion includes at least one of a black resin, a carbon black, a mixture of metal particles, graphite powder, gravure ink, black spray, or black enamel.

17. The display apparatus according to claim 13, wherein the optical layer further comprises an adhesive layer having a third refractive index different from the first refractive index and bonding the resin layer with the second polarizing plate.

18. The display apparatus according to claim 17, wherein the resin layer further comprises a light refractive pattern protruding toward a rear direction of the display panel and in contact with the adhesive layer.

19. The display apparatus according to claim 18, wherein the light refractive pattern includes a cross section having a shape of a triangle.

20. A display apparatus including a display panel configured to receive light from a light source module, wherein the display panel comprises:

a liquid crystal panel;

a first polarizing plate positioned on a rear side of the liquid crystal panel and a second polarizing plate positioned on a front side of the liquid crystal panel; and

an optical layer positioned on a front surface of the second polarizing plate,

wherein the optical layer comprises;

a resin layer comprising a single layer having a first refractive index, and including a plurality of accommodating grooves each accommodating groove having a light adjusting portion and a light refractive pattern positioned between the plurality of accommodating grooves neighboring each other and protruding toward a rear direction of the display panel,

wherein the light adjusting portion comprises;

a light refracting portion having a second refractive index and configured to refract a part of light entering the optical layer; and

a light absorbing portion configured to absorb the other part of the light entering the optical layer and disposed in each of the plurality of accommodating grooves together with the light refracting portion.