Display device and method for reducing moiré effects using the same

1. A display device, comprising:

a printed circuit board (PCB) having an array of light emitting members;

an anti-moiré member spaced away from the array of light emitting members at about a first distance (d); and

a frame member receiving the PCB so that the array of light emitting members are interposed between the anti-moiré member and the frame member,

wherein the anti-moiré member comprises a first layer disposed to face the PCB,

wherein the first layer comprises a first foil with a randomized pattern surface,

wherein the frame member further comprises a first bracket and a second bracket, and each of the first bracket and the second bracket provides a structural support for the PCB, and

wherein the first bracket is configured to perform a coarse adjustment of a distance between the light emitting members and the anti-moiré member, and the second bracket is configured to perform a fine adjustment of the distance between the light emitting members and the anti-moiré member.

2. The display device of claim 1 , wherein the first distance (d) equals L/(2*tan (α)), wherein a second distance (L) is a shortest distance between two adjacent light emitting members, and wherein α is a radiation angle of the light emitting member.

3. The display device of claim 2 , wherein the radiation angle α is in a range of 45 to 50 degrees.

4. The display device of claim 3 , wherein the first bracket is a vertical bracket and the second bracket is a horizontal bracket.

5. The display device of claim 1 , wherein the first bracket is configured to adjust a distance between the light emitting members and the anti-moiré member in a range of 0 to 10 mm.

6. The display device of claim 1 , wherein second bracket is configured to adjust a distance between the light emitting members and the anti-moiré member in a range of 0 to 10 mm.

7. The display device of claim 1 , wherein the PCB is configured to be movable toward an anti-moiré member by each of the first bracket and the second bracket, each of the first bracket and the second bracket respectively guides the PCB in a direction perpendicular to a plane formed by a surface of the anti-moiré member.

8. The display device of claim 1 , wherein the PCB is detachably attached to the frame member using a magnetic connector.

9. The display device of claim 8 , wherein the magnetic connector is configured to adjust a distance between the PCB and the anti-moiré member in a range of 0 to 5 mm.

10. The display device of claim 1 , wherein the first foil has the randomized pattern surface having a peak-valley height in a range of 0 to 2 μm.

11. The display device of claim 1 , wherein the first foil comprises a transparent pressure sensitive adhesive (PSA), and wherein the PSA is selected from the group consisting of an acrylic compound, a methacrylate compound, a rubber compound, a water based compound, a solvent based compound, a silicone compound, and a styrene compound.

12. The display device of claim 1 , wherein the anti-moiré member further comprises a second layer disposed on the first layer and having a second foil with a colored transparent film.

13. The display device of claim 12 , wherein the colored transparent film has a shading coefficient of about 0.65, a visible light reflected of about 5%, a visible light transmission of about 85%, an emissivity of about 0.87, and U value of about 1.09.

14. The display device of claim 13 , wherein the anti-moiré member further comprises a third layer disposed on the second layer and the third layer is made of an untreated transparent glass, and wherein the third layer has a thickness of about 6 mm.

15. The display device of claim 14 , wherein the anti-moiré member further comprises a fourth layer disposed on the third layer and the fourth layer has a third foil with a matte surface.

16. A method for reducing moiré effects in a light emitting diode (LED) in a display device of claim 1 , the method comprising:

placing a display device of claim 1 on a surface;

calculating the first distance (d) that equals L/(2*tan (α)), wherein L is a shortest distance between two adjacent light emitting members, and α is the radiation angle for each of the light emitting member in the array of light emitting members in the display device; and

adjusting a distance between the light emitting members and the anti-moiré member to about the first distance (d).

17. The method of claim 16 , wherein the adjustment step is carried out using at least one of the first bracket and the second bracket.

18. The method of claim 16 , wherein the anti-moiré member further comprises a second layer disposed on the first layer and having a second foil with a colored transparent film, a third layer disposed on the second layer and being made of an untreated glass, and a fourth layer disposed on the third layer having a third foil with a matte surface.

19. The method of claim 16 , wherein the radiation angle α is in a range of 45 to 50 degrees.

20. A display device comprising:

a printed circuit board (PCB) having a plurality of light emitting members;

a frame member comprising:

a first bracket, and

a second bracket, wherein each of the first bracket and the second bracket provides a structural support for the PCB; and

an anti-moiré member spaced away from the light emitting members at about a first distance (d), and the anti-moiré member comprising:

a first layer disposed to face the PCB and having a first foil with a randomized pattern surface,

a second layer disposed on the first layer and having a second foil with a colored transparent film,

a third layer disposed on the second layer and being made of an untreated glass, and

a fourth layer disposed on the third layer having a third foil with a matte surface,

wherein the first distance (d) is equals L/(2*tan (α)),

wherein a second distance (L) is a shortest distance between two adjacent light emitting members,

wherein each of the array of light emitting members has a radiation angle α,

wherein the first bracket is configured to perform a coarse adjustment of a distance between the light emitting members and the anti-moiré member, and the second bracket is configured to perform a fine adjustment of the distance between the light emitting members and the anti-moiré member, and

wherein the PCB is interposed between the anti-moiré member and the frame member.