公开(公告)号：US11953788B2

公开(公告)日：2024-04-09

申请号：US18132845

申请日：2023-04-10

Applicant: Sharp Display Technology Corporation

Inventor： Hiroyuki Hakoi

IPC: G02F1/1337 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1343

CPC classification number: G02F1/133753 ,  G02F1/133541 ,  G02F1/133638 ,  G02F1/133788 ,  G02F1/134336 ,  G02F1/13439

Abstract: A liquid crystal display device includes a first substrate, a second substrate located closer to an observer than the first substrate, and a liquid crystal layer provided between the first substrate and the second substrate, and performs display in a twisted vertical alignment mode. Each pixel includes a reflective region where display is performed in a reflection mode. The first substrate includes a reflective electrode including a portion located in the reflective region, and a first vertical alignment film. The second substrate includes a second vertical alignment film. The liquid crystal layer includes a liquid crystal material having negative dielectric anisotropy, and a chiral agent. The reflective electrode includes silver or a silver alloy. The reflective region includes a plurality of liquid crystal domains in which reference alignment azimuths of liquid crystal molecules are different from each other.

公开(公告)号：US11644715B2

公开(公告)日：2023-05-09

申请号：US17859075

申请日：2022-07-07

Applicant: Sharp Display Technology Corporation

Inventor： Takashi Satoh ,  Takahiro Sasaki ,  Hiroyuki Hakoi ,  Ming Ni

IPC: G02F1/1335 ,  G02F1/1333 ,  G02F1/1337 ,  G02F1/1362

CPC classification number: G02F1/133555 ,  G02F1/133345 ,  G02F1/133769 ,  G02F1/136227 ,  G02F2201/123

Abstract: A liquid crystal display device includes a first substrate; a second substrate; and a vertical alignment-type liquid crystal layer. The first substrate includes a backplane circuit, a first interlayer insulating layer covering the backplane circuit, a first reflective electrode provided on the first interlayer insulating layer and including a first region located in each of pixels and a second region located between any two adjacent pixels, a second interlayer insulating layer covering the first reflective electrode, and a pixel electrode provided on the second interlayer insulating layer in each pixel. The pixel electrode is electrically connected with the backplane circuit in first and second contact holes formed in the first and second interlayer insulating layers. The first substrate further includes a second reflective electrode provided on the second interlayer insulating layer so as to overlap the first contact hole as seen in a direction normal to a display surface.

公开(公告)号：US11966125B2

公开(公告)日：2024-04-23

申请号：US18140542

申请日：2023-04-27

Applicant: Sharp Display Technology Corporation

Inventor： Hiroyuki Hakoi ,  Takashi Satoh

IPC: G02F1/1343 ,  G02F1/1335

CPC classification number: G02F1/134336 ,  G02F1/133514 ,  G02F1/133553 ,  G02F1/13439

Abstract: A liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. Each pixel includes a reflection region and a transmission region. The first substrate includes a reflecting layer, a first insulating layer, and a pixel electrode. The thickness of the liquid crystal layer in the transmission region is greater than the thickness of the liquid crystal layer in the reflection region, and the liquid crystal layer has a twist angle of substantially 0 degree. A surface of the first substrate that faces the liquid crystal layer includes an upper step portion, a lower step portion, and an inclined portion. The length L1 of a portion of the inclined portion included in the reflection region and the length L2 of a portion of the lower step portion included in the reflection region satisfy the relationship L1+L2≤1.81·L1.

公开(公告)号：US12117697B2

公开(公告)日：2024-10-15

申请号：US18384131

申请日：2023-10-26

Applicant: Sharp Display Technology Corporation

Inventor： Mariko Honda ,  Nobuhiro Waka ,  Hiroyuki Hakoi ,  Takahiro Sasaki ,  Takashi Satoh ,  Akira Sakai ,  Seiji Maeda

IPC: G02F1/1343 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/1337

CPC classification number: G02F1/134345 ,  G02F1/133345 ,  G02F1/133514 ,  G02F1/133553 ,  G02F1/133742 ,  G02F2201/52

Abstract: A liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. Each pixel includes a reflective region and a transmissive region. The first substrate includes a reflective layer, an interlayer insulating layer provided to cover the reflective layer, and a pixel electrode provided on the interlayer insulating layer in each pixel. The interlayer insulating layer has a recess portion which is defined by a bottom surface and an inclined side surface and at least a part of which is located in the transmissive region. A depth of the recess portion of the interlayer insulating layer is 0.5 μm or more, and an inclination angle of the inclined side surface of the recess portion is 25° or less.