公开(公告)号：US20190317346A1

公开(公告)日：2019-10-17

申请号：US15951297

申请日：2018-04-12

Applicant: Sharp Kabushiki Kaisha

Inventor： David James Montgomery ,  Hywel Hopkin ,  Jiyun Yu

IPC: G02F1/1347 ,  G02F1/1343

Abstract: A passive matrix display has corrugated electrode edges to reduce zone visibility within a display system. A passive matrix display includes a first substrate and a second substrate; a liquid crystal layer positioned between the first and second substrates; a patterned electrode layer formed on the first substrate comprising a plurality of individual electrodes, wherein adjacent individual electrodes are separated by an electrode gap; and a second electrode layer formed on the second substrate. At least a portion of opposing edges of adjacent individual electrodes at the electrode gap include corrugations. The elements of the corrugations may be any suitable shapes and/or sizes as may be suitable for any particular application. The corrugations may be uniformly shaped or varying, symmetric or asymmetric about a horizontal axis, and/or may have a regular or irregular pattern. Another aspect is a display system including the enhanced passive matrix display that reduces zone visibility.

公开(公告)号：US10802343B2

公开(公告)日：2020-10-13

申请号：US15918093

申请日：2018-03-12

Applicant: Sharp Kabushiki Kaisha

Inventor： Nathan James Smith ,  Andrew Acreman ,  Hywel Hopkin ,  Kiyoshi Minoura ,  Koji Murata ,  Yuichi Kawahira ,  Akira Sakai ,  Jiyun Yu

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1339 ,  G02F1/1333

Abstract: A liquid crystal device (LCD) is configured for minimizing unwanted internal ambient light reflections. The LCD includes a plurality of layers, the layers comprising from a viewing side: a first linear polariser; an external retarder that is made of a cyclic olefin polymer (COP) material or a cyclic olefin copolymer (COC) material; a colour filter substrate; a colour filter layer; an internal reactive mesogen (RM) retarder alignment layer; an internal reactive mesogen (RM) retarder; a liquid crystal (LC) layer; and a second linear polarizer. The external retarder and the internal RM retarder are configured such that the optical properties (for example light polarization control function) of the external retarder and the internal retarder are matched to negate each other for light passing through the external retarder and the internal RM retarder. The LCD simultaneously maintains high image quality in both high and low ambient lighting conditions.

公开(公告)号：US10782545B2

公开(公告)日：2020-09-22

申请号：US15981022

申请日：2018-05-16

Applicant: Sharp Kabushiki Kaisha

Inventor： Nathan James Smith ,  Andrew Acreman ,  Hywel Hopkin ,  Takehiro Murao ,  Jiyun Yu

IPC: G02F1/1347 ,  G02F1/13 ,  G02F1/13363 ,  G02F1/1335 ,  G09G3/36 ,  G02F1/1343 ,  G02F1/13357

Abstract: A switchable view angle control device for a privacy view display system includes an electrically switchable view angle control LCD that is operable in a first state and a second state; a front polarizer located on a viewing side of the switchable view angle control LCD; and a polarized light source located on a non-viewing side of the switchable view angle control LCD that emits polarized light. When the switchable view angle control LCD in the first state, the view angle control device operates in a narrow angle view mode in which off-axis polarized light from the polarized light source is changed by the switchable view angle control LCD so that the off-axis light is absorbed by the front polarizer, and on-axis light passes through the switchable view angle control LCD and the front polarizer. When the switchable view angle control LCD is in the second state, the view angle control device operates in a wide angle view mode in which the polarized light from the polarized light source is scattered by the switchable view angle control LCD and passes through the front polarizer.

公开(公告)号：US20190353943A1

公开(公告)日：2019-11-21

申请号：US15981022

申请日：2018-05-16

Applicant: Sharp Kabushiki Kaisha

Inventor： Nathan James Smith ,  Andrew Acreman ,  Hywel Hopkin ,  Takehiro Murao ,  Jiyun Yu

IPC: G02F1/13 ,  G02F1/13363 ,  G02F1/1335 ,  G09G3/36 ,  G02F1/1343

Abstract: A switchable view angle control device for a privacy view display system includes an electrically switchable view angle control LCD that is operable in a first state and a second state; a front polarizer located on a viewing side of the switchable view angle control LCD; and a polarized light source located on a non-viewing side of the switchable view angle control LCD that emits polarized light. When the switchable view angle control LCD in the first state, the view angle control device operates in a narrow angle view mode in which off-axis polarized light from the polarized light source is changed by the switchable view angle control LCD so that the off-axis light is absorbed by the front polarizer, and on-axis light passes through the switchable view angle control LCD and the front polarizer. When the switchable view angle control LCD is in the second state, the view angle control device operates in a wide angle view mode in which the polarized light from the polarized light source is scattered by the switchable view angle control LCD and passes through the front polarizer.

公开(公告)号：US20190278120A1

公开(公告)日：2019-09-12

申请号：US15918093

申请日：2018-03-12

Applicant: Sharp Kabushiki Kaisha

Inventor： Nathan James Smith ,  Andrew Acreman ,  Hywel Hopkin ,  Kiyoshi Minoura ,  Koji Murata ,  Yuichi Kawahira ,  Akira Sakai ,  Jiyun Yu

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1339

Abstract: A liquid crystal device (LCD) is configured for minimizing unwanted internal ambient light reflections. The LCD includes a plurality of layers, the layers comprising from a viewing side: a first linear polariser; an external retarder that is made of a cyclic olefin polymer (COP) material or a cyclic olefin copolymer (COC) material; a colour filter substrate; a colour filter layer; an internal reactive mesogen (RM) retarder alignment layer; an internal reactive mesogen (RM) retarder; a liquid crystal (LC) layer; and a second linear polarizer. The external retarder and the internal RM retarder are configured such that the optical properties (for example light polarization control function) of the external retarder and the internal retarder are matched to negate each other for light passing through the external retarder and the internal RM retarder. The LCD simultaneously maintains high image quality in both high and low ambient lighting conditions.

公开(公告)号：US10451936B1

公开(公告)日：2019-10-22

申请号：US15951297

申请日：2018-04-12

Applicant: Sharp Kabushiki Kaisha

Inventor： David James Montgomery ,  Hywel Hopkin ,  Jiyun Yu

IPC: G02F1/1347 ,  G02F1/1343 ,  F21V8/00

Abstract: A passive matrix display has corrugated electrode edges to reduce zone visibility within a display system. A passive matrix display includes a first substrate and a second substrate; a liquid crystal layer positioned between the first and second substrates; a patterned electrode layer formed on the first substrate comprising a plurality of individual electrodes, wherein adjacent individual electrodes are separated by an electrode gap; and a second electrode layer formed on the second substrate. At least a portion of opposing edges of adjacent individual electrodes at the electrode gap include corrugations. The elements of the corrugations may be any suitable shapes and/or sizes as may be suitable for any particular application. The corrugations may be uniformly shaped or varying, symmetric or asymmetric about a horizontal axis, and/or may have a regular or irregular pattern. Another aspect is a display system including the enhanced passive matrix display that reduces zone visibility.

公开(公告)号：US20190278139A1

公开(公告)日：2019-09-12

申请号：US15918104

申请日：2018-03-12

Applicant: Sharp Kabushiki Kaisha

Inventor： Nathan James Smith ,  Andrew Acreman ,  Akira Sakai ,  Kiyoshi Minoura ,  Koji Murata ,  Yuichi Kawahira ,  Jiyun Yu

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1337 ,  G02F1/1368 ,  G02F1/1341 ,  G02F1/1339 ,  C09K19/56

Abstract: A method of fabricating a liquid crystal device (LCD) minimizes changes to optical properties of an internal RM retarder. In exemplary embodiments, the fabricating method comprises depositing a plurality of layers in an optical stack, the plurality of layers including from a viewing side: a first linear polariser; an external retarder; a colour filter substrate; a colour filter layer; an internal reactive mesogen (RM) retarder alignment layer; an internal reactive mesogen (RM) retarder; a liquid crystal (LC) layer; a thin film transistor (TFT) substrate; and a second linear polarizer. Any layer that is deposited after the internal RM retarder on a non-viewing side relative to the color filter substrate, and in direct contact with the internal RM retarder, has a solvent concentration at deposition of less than 15% of a solvent that can alter optical properties of the internal RM retarder (e.g., less than 15% NMP).