US 12,282,178 B2
Optical film and display device
Chao-Hung Weng, Hsin-Chu (TW); Hung-Tse Lin, Hsin-Chu (TW); Kuan-Wen Liu, Hsin-Chu (TW); Hao-Jan Kuo, Hsin-Chu (TW); and Ming-Dah Liu, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Jun. 3, 2024, as Appl. No. 18/731,401.
Claims priority of application No. 202310679542.5 (CN), filed on Jun. 9, 2023.
Prior Publication US 2024/0411063 A1, Dec. 12, 2024
Int. Cl. F21V 8/00 (2006.01); G02B 5/02 (2006.01)
CPC G02B 5/0278 (2013.01) [G02B 6/0051 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical film, comprising:
a grid layer, having a first surface, a second surface, a plurality of light-shading portions, and a plurality of light-transmitting portions, wherein the first surface is opposite and parallel to the second surface, the plurality of light-shading portions and the plurality of light-transmitting portions are located between the first surface and the second surface, and the plurality of light-shading portions and the plurality of light-transmitting portions are alternately arranged along the first surface;
each of the plurality of light-shading portions has a third surface, a fourth surface, a fifth surface, a sixth surface, and a seventh surface, the third surface are coplanar with the first surface, the fourth surface and the fifth surface are respectively connected to opposite sides of the third surface, an angle degree of a first included angle between the fourth surface and the third surface is A1, and an angle degree of a second included angle between the fifth surface and the third surface is A2;
the sixth surface is connected to the fourth surface and the second surface, the seventh surface is connected to the fifth surface and the second surface, an angle degree of a third included angle between the sixth surface and the second surface is A3, and an angle degree of a fourth included angle between the seventh surface and the second surface is A4;
wherein 85°<A1≤90°, 85°<A2≤90°, 0°<A3<85°, 0°<A4<85°, A2≠A4, and A1≠A3;
wherein each of the plurality of light-shading portions further has a first corner and a second corner,
the fourth surface has a first edge and a second edge opposite to each other, the first edge is adjacent to the third surface, the second edge is adjacent to the sixth surface, and the first corner is located between the fourth surface and the sixth surface;
the fifth surface has a third edge and a fourth edge opposite to each other, the third edge is adjacent to the third surface, the fourth edge is adjacent to the seventh surface, and the second corner is located between the fifth surface and the seventh surface;
in a first direction from the first surface to the second surface, the first corner and the second corner are away from the first surface and close to the second surface.