公开(公告)号：US20250053044A1

公开(公告)日：2025-02-13

申请号：US18760063

申请日：2024-07-01

Applicant: Sharp Display Technology Corporation

Inventor： Kouichi WATANABE ,  Shinichi TERASHITA

IPC: G02F1/1335 ,  G02F1/1333 ,  G02F1/13363 ,  G02F1/1343 ,  G02F1/139

Abstract: A transflective liquid crystal display device provided with a plurality of pixels, and includes: a first polarizer, a first phase difference layer, a first substrate, a liquid crystal layer, a second substrate, a second phase difference layer, and a second polarizer. The first substrate includes a reflective layer. The first phase difference layer includes a first λ/2 plate and a first λ/4 plate. The second phase difference layer includes a second λ/2 plate and a second λ/4 plate. At least one of the first phase difference layer and the second phase difference layer further includes a positive C plate. The liquid crystal layer takes a twist alignment when no voltage is applied. Each of the plurality of pixels includes a reflective region in which light is reflected by the reflective layer to perform display and a transmissive region in which light is transmitted to perform display.

公开(公告)号：US20250048558A1

公开(公告)日：2025-02-06

申请号：US18696256

申请日：2021-12-01

Applicant: Sharp Display Technology Corporation

Inventor： Takushi MIHOTANI ,  Tadashi NISHIOKA

IPC: H05K1/18 ,  H10K59/12 ,  H10K77/10 ,  H10K102/00

Abstract: An organic EL display device includes: an IC chip mounted through a first conductive material; and an FPC mounted through a second conductive material. The IC chip and the FPC are arranged side by side. Between the IC chip and the FPC, a partition wall member is provided to separate the first conductive material and the second conductive material from each other.

公开(公告)号：US20250028205A1

公开(公告)日：2025-01-23

申请号：US18747437

申请日：2024-06-18

Applicant: Sharp Display Technology Corporation

Inventor： Shinichi Terashita ,  Kouichi Watanabe ,  Takehisa Yoshida ,  Fumikazu Shimoshikiryoh

IPC: G02F1/13363 ,  G02F1/1333 ,  G02F1/1337 ,  G02F1/1343 ,  G02F1/139

Abstract: A liquid crystal display device includes a first substrate, a liquid crystal layer, a second substrate, a retardation layer, and a polarizer in this order from a back face side, and includes a plurality of pixels arrayed in a matrix shape, in which the first substrate includes a reflective layer that reflects light, a first electrode and a second electrode that are capable of generating a transverse electrical field in the liquid crystal layer, and a first horizontal alignment film that is in contact with the liquid crystal layer, the second substrate includes a second horizontal alignment film in contact with the liquid crystal layer, the retardation layer includes a Δ/4 plate and a Δ/2 plate, the liquid crystal layer includes a positive-type liquid crystal material or a negative-type liquid crystal material, and has a twist alignment when no voltage is applied, and an angle formed by a polarization axis of the polarizer and an alignment direction of liquid crystal molecules defined by the first horizontal alignment film is within a predetermined range.

公开(公告)号：US12205553B2

公开(公告)日：2025-01-21

申请号：US18534339

申请日：2023-12-08

Applicant: Sharp Display Technology Corporation

Inventor： Nariya Kanbara

IPC: G09G3/36 ,  G02F1/13357 ,  G09G3/34

Abstract: A backlight device includes: a plurality of LED elements arranged in a plurality of regions including a first region and a second region; a plurality of LED drive circuits configured to generate LED drive signals configured to drive the LED elements; a control circuit configured to outputs a vertical synchronization signal and current setting data configured to set luminance of the LED elements; and a time constant circuit that delays the vertical synchronization signal by a predetermined time. The LED drive circuits includes a first LED drive circuit associated with the LED elements in the first region. The time constant circuit includes a first time constant circuit connected to the first LED drive circuit. The first LED drive circuit is configured to receive the current setting data output from the control circuit and receive the first vertical synchronization signal delayed by the first time constant circuit.

公开(公告)号：US12204197B2

公开(公告)日：2025-01-21

申请号：US18595844

申请日：2024-03-05

Applicant: Sharp Display Technology Corporation

Inventor： Yuichi Kawahira ,  Masahiro Hasegawa ,  Ryosuke Saigusa ,  Jianeng Xu ,  Akira Sakai

IPC: G02F1/1335 ,  G02F1/1333

Abstract: A color filter includes a frame portion in which the reflectance of light incident from the transparent substrate side is less than the reflectance of light incident from the overcoat layer side and an opening portion in which the reflectance of light incident from the transparent substrate side is greater than the reflectance of light incident from the overcoat layer side. The color filter satisfies nbc×dbc

公开(公告)号：US12198648B2

公开(公告)日：2025-01-14

申请号：US18229211

申请日：2023-08-02

Applicant: Sharp Display Technology Corporation

Inventor： Akihiro Masuda

IPC: G09G3/36 ,  G09G3/20

Abstract: A switching control circuit is included in a boost direct current to direct current (DC-DC) converter generating an analog power supply voltage to be supplied to a source driver. The switching control circuit supplies a switching pulse to a control terminal of a switching element varying an inductor current such that an operation mode transitions to a current continuation mode during a first predetermined period that is at least a portion of a time duration that continues from a moment when the operation mode transitions from the current continuation mode to a current discontinuation mode in response to transitioning from an efficient video period to a vertical blanking period to a moment when the vertical blanking period transitions to the effective video period.

公开(公告)号：US20250014495A1

公开(公告)日：2025-01-09

申请号：US18705477

申请日：2021-12-29

Applicant: Sharp Display Technology Corporation

Inventor： Masamitsu KOBAYASHI ,  Takafumi MIURA

IPC: G09G3/20

Abstract: A display device is configured to divide one frame into a first-half sub-frame and a second-half sub-frame and display an image in each of the first-half sub-frame and the second-half sub-frame. The display device includes a pixel-of-interest specifying unit, a first peripheral pixel specifying unit, a first difference coefficient determination unit, a first coefficient determination unit, a first pixel value determination unit, a second peripheral pixel specifying unit, a second difference coefficient determination unit, a second coefficient determination unit, and a second pixel value determination unit. As a first coefficient and a second coefficient equal to each other are larger, a difference between an output pixel value corresponding to an input pixel value in a first conversion data and an output pixel value corresponding to the identical input pixel value in a second conversion data is larger.

公开(公告)号：US12190828B2

公开(公告)日：2025-01-07

申请号：US18566949

申请日：2021-07-05

Applicant: Sharp Display Technology Corporation

Inventor： Kaoru Yamamoto

IPC: G09G3/3275 ,  G09G3/3266

Abstract: To realize frame narrowing of a display device that uses a display element driven by a current. A second scanning signal line drive circuit configured to drive second scanning signal lines each connected to a control terminal of a writing control transistor is constituted by a shift register composed of unit circuits equal in number to half a number of the second scanning signal lines. Each of the unit circuits included in the shift register collectively drives two of the second scanning signal lines adjacent to each other. In a period during which a power supply control transistor and a light emission control transistor are maintained in an off state and the writing control transistor is maintained in an on state in first and second pixel circuits connected to the two second scanning signal lines adjacent to each other, a threshold voltage compensation transistor and an initialization transistor in the first pixel circuit and a threshold voltage compensation transistor and an initialization transistor in the second pixel circuit are sequentially set to an on state for a predetermined period each.

公开(公告)号：US20240427452A1

公开(公告)日：2024-12-26

申请号：US18671907

申请日：2024-05-22

Applicant: Sharp Display Technology Corporation

Inventor： Kazutoshi Kida

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch panel includes a first touch detection electrode including a first main portion and a first sub-portion, a second touch detection electrode including a second main portion and a second sub-portion, a first connecting line that connects the first main portion and the first sub-portion, and a second connecting line that connects the second main portion and the second sub-portion. The first sub-portion is disposed away from the first main portion. The second sub-portion is disposed away from the second main portion. The first and second sub-portions are disposed between the first and second main portions. The first and second connecting lines are formed in a layer that is a different layer from a layer in which the first and second touch detection electrodes are formed.

公开(公告)号：US20240427202A1

公开(公告)日：2024-12-26

申请号：US18633421

申请日：2024-04-11

Applicant: Sharp Display Technology Corporation

Inventor： Shinzoh MURAKAMI

IPC: G02F1/1345 ,  G02F1/1362 ,  H01L27/12

Abstract: A driving substrate of a display panel includes A driving substrate of a display panel, the driving substrate a pixel element, a plurality of terminals, formed by at least one metal layer and placed outside a pixel region in which the pixel element is placed, that are connected separately to each of a plurality of output signal bumps of a driving circuit, and a plurality of output signal wires extending separately from each of the plurality of terminals to the pixel region. The plurality of output signal wires are placed between adjacent two of the plurality of terminals in planar view. The plurality of output signal wires placed between the adjacent two terminals include two or more output signal wires formed by two or more layers. The two or more output signal wires are disposed to at least partially overlap each other in planar view.