US 12,105,373 B2
Display module and display device
Liting Fang, Xiamen (CN); Peiqin Deng, Xiamen (CN); Ling Wu, Xiamen (CN); and Boping Shen, Xiamen (CN)
Assigned to Xiamen Tianma Micro-Electronics Co., Ltd., Xiamen (CN)
Filed by Xiamen Tianma Micro-Electronics Co., Ltd., Xiamen (CN)
Filed on Dec. 29, 2022, as Appl. No. 18/091,084.
Claims priority of application No. 202211358284.2 (CN), filed on Nov. 1, 2022.
Prior Publication US 2024/0142818 A1, May 2, 2024
Int. Cl. G02F 1/1335 (2006.01); G02F 1/13363 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/133531 (2021.01) [G02F 1/133512 (2013.01); G02F 1/133514 (2013.01); G02F 1/13363 (2013.01); G02F 1/134336 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A display module, comprising:
a backlight module; a light control cell; a display liquid crystal cell; a first polarizer; a second polarizer; and a composite optical film, wherein:
along a first direction, the light control cell is disposed between the backlight module and the display liquid crystal cell and on a light-exiting surface of the backlight module, the first direction being a thickness direction of the display module;
the first polarizer is disposed on a side of the display liquid crystal cell facing away from the light control cell;
the second polarizer is disposed between the display liquid crystal cell and the light control cell;
the composite optical film is disposed between the display liquid crystal cell and the backlight module;
a transmission axis of the first polarizer is perpendicular to a transmission axis of the second polarizer; and
the composite optical film is configured to transmit P-polarized light and reflect S-polarized light, wherein:
the composite optical film further comprises:
a diffusion layer;
a protective layer without diffusion function and reflecting function, wherein along the first direction, a first optical layer and a second optical layer are alternately disposed along the first direction between the protective layer and the diffusion layer, and the protective layer is located between the diffusion layer and the backlight module, and wherein the backlight module reflects the S-polarized light reflected by the composite optical film; and
a first composite optical film and a second composite optical film,
wherein the first composite optical film is located between the light control cell and the backlight module; the second composite optical film is located between the display liquid crystal cell and the light control cell; a transmission axis of the first composite optical film is parallel to the transmission axis of the first polarizer; a transmission axis of the second composite optical film is parallel to the transmission axis of the second polarizer; a total number of the first optical layers and the second optical layers included in the first composite optical film is N1; a total number of the first optical layers and the second optical layers included in the second composite optical film is N2; and N1>N2.