Patent ID: 11966125
Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A liquid crystal display device comprising:
a first substrate;
a second substrate facing the first substrate;
a liquid crystal layer provided between the first substrate and the second substrate; and
a plurality of pixels arrayed in a matrix,
wherein each of the plurality of pixels includes a reflection region in which a display is carried out in a reflection mode and a transmission region in which a display is carried out in a transmission mode,
the first substrate includes a reflecting layer including a portion located in the reflection region of each pixel, a first insulating layer provided so as to cover the reflecting layer, and a pixel electrode provided on top of the first insulating layer and disposed in each pixel,
a thickness of the liquid crystal layer in the transmission region is greater than a thickness of the liquid crystal layer in the reflection region,
the liquid crystal layer has a twist angle of substantially 0 degree,
a surface of the first substrate that faces the liquid crystal layer has a step including an upper step portion located in at least the reflection region, a lower step portion located in at least the transmission region, and an inclined portion connecting the upper step portion with the lower step portion, and
when viewed from a direction normal to a display surface, a length (L1) of a portion of the inclined portion included in the reflection region and a length (L2) of a portion of the lower step portion included in the reflection region satisfy a relationship L1+L2≤1.81·L1.