US 11,841,575 B2
Liquid crystal display device
Akira Hirai, Kameyama (JP); Yuichi Kawahira, Kameyama (JP); and Akira Sakai, Kameyama (JP)
Assigned to Sharp Display Technology Corporation, Kameyama (JP)
Filed by Sharp Display Technology Corporation, Kameyama (JP)
Filed on Apr. 13, 2023, as Appl. No. 18/134,517.
Claims priority of application No. 2022-067744 (JP), filed on Apr. 15, 2022.
Prior Publication US 2023/0333427 A1, Oct. 19, 2023
Int. Cl. G02F 1/1335 (2006.01); G02F 1/1368 (2006.01); G02F 1/1343 (2006.01)
CPC G02F 1/133531 (2021.01) [G02F 1/1368 (2013.01); G02F 1/1343 (2013.01); G02F 1/133512 (2013.01); G02F 1/133514 (2013.01); G02F 1/133528 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A liquid crystal display device comprising:
a first polarizing plate;
a first substrate including a thin-film transistor;
a liquid crystal layer containing liquid crystal molecules;
a second substate;
a second polarizing plate; and
a backlight,
wherein
the first polarizing plate, the first substate, the liquid crystal layer, the second substrate, the second polarizing plate, and the backlight are arranged in this order,
the first substrate has a display area and a frame area placed on an outer edge of the display area,
the liquid crystal display device has an ink layer between the frame area of the first substrate and the first polarizing plate,
the liquid crystal display device has an internal reflectance ratio y of 0.2 to 0.3,
the internal reflectance ratio y is expressed by Formula (1-1) as follows:
y=Y2/Y1  (1-1),
where Y2 denotes an internal reflectance (%) of the frame area as expressed by a Y value of XYZ color coordinates and Y1 denotes an internal reflectance (%) of the display area as expressed by a Y value of XYZ color coordinates,
Y2 and Y1 are calculated by Formulas (1-2) and (1-3), respectively, as follows:
Y2=YA2−YB  (1-2)
Y1=YA1−YB  (1-3),
where YA2 denotes a reflectance (%) of the frame area, YA1 denotes a reflectance (%) of the display area, and YB denotes a surface reflectance (%) of the first polarizing plate.