公开(公告)号：US20230046927A1

公开(公告)日：2023-02-16

申请号：US17975920

申请日：2022-10-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Kei TAKAHASHI ,  Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kazunori WATANABE

IPC: G09G3/32

Abstract: The power consumption of a display device is reduced. The power consumption of a driver circuit in a display device is reduced. A pixel included in the display device includes a display element. The pixel is configured to have a function of retaining a first voltage corresponding to a first input pulse signal and a function of driving the display element with a third voltage obtained by addition of a second voltage corresponding to a second input pulse signal to the first voltage.

公开(公告)号：US20230005424A1

公开(公告)日：2023-01-05

申请号：US17781409

申请日：2020-12-10

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kazunori WATANABE

IPC: G09G3/3233 ,  H01L27/28

Abstract: A display apparatus capable of image capturing with high sensitivity is provided. The display apparatus is configured to include first to third switches, a first transistor, a second transistor, and a light-emitting/receiving element. The first switch is electrically connected to a gate of the first transistor. The second switch is positioned between one of a source and a drain of the first transistor and one electrode of the light-emitting/receiving element. The third switch is positioned between the one electrode of the light-emitting/receiving element and a gate of the second transistor. The other of the source and the drain of the first transistor is supplied with a first potential. The other electrode of the light-emitting/receiving element is supplied with a second potential. The light-emitting/receiving element has a function of emitting light of a first color and a function of receiving light of a second color.

公开(公告)号：US20220319461A1

公开(公告)日：2022-10-06

申请号：US17844931

申请日：2022-06-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Naoto KUSUMOTO

IPC: G09G3/36 ,  G02F1/1368

Abstract: A display apparatus with low-power consumption is provided. The display apparatus includes an inverter circuit and a pixel having a function of adding data, and the inverter circuit has a function of inverting data supplied from a source driver. The inverter circuit has a function of inverting data supplied from a source driver. The pixel has a function of adding data supplied from the source driver and the inverter circuit. Accordingly, the pixel can generate a voltage several times higher than the output voltage of the source driver and can supply the voltage to a display device. With such a structure, the output voltage of the source driver can be lowered, so that a display apparatus with low power consumption can be achieved.

公开(公告)号：US20220299831A1

公开(公告)日：2022-09-22

申请号：US17837711

申请日：2022-06-10

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kouhei TOYOTAKA ,  Kazunori WATANABE

IPC: G02F1/1362 ,  G02F1/1368 ,  G02F1/137 ,  G09G3/36 ,  G09G3/20 ,  G02F1/133

Abstract: A display apparatus in which a high voltage can be supplied to a display device is provided. The display apparatus includes a data generation circuit, a source driver circuit, and a pixel. The source driver circuit is electrically connected to the pixel through first and second wirings functioning as signal lines. The pixel includes a display device that is a liquid crystal device, a potential of one electrode of the display device can be a potential of the first wiring, and a potential of the other electrode of the display device can be a potential of the second wiring. The image data generation circuit has a function of generating digital image data including first and second data. In the case where image data corresponding to the digital image data is supplied to the pixel, one of the first and second wirings is made to have a potential corresponding to first data, and the other of the first and second wirings is made to have a potential corresponding to the first data. The potential of the first wiring and the potential of the second wiring are interchanged so that frame inversion driving or the like can be performed.

公开(公告)号：US20210366381A1

公开(公告)日：2021-11-25

申请号：US17393429

申请日：2021-08-04

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Kouhei TOYOTAKA ,  Kei TAKAHASHI ,  Kentaro HAYASHI ,  Shunpei YAMAZAKI

IPC: G09G3/3225 ,  H01L27/32 ,  H01L29/786

Abstract: A display device that can display a high-luminance image is provided. The display device includes a display element and a memory circuit which is electrically connected to a first wiring and a second wiring. First, a reference potential is supplied to the first wiring. Next, a first image signal is supplied to the memory circuit through the second wiring. Then, the second image signal is added to the first image signal by supplying the second image signal to the memory circuit through the first wiring. After that, an image obtained by superimposing an image corresponding to the first image signal and an image corresponding to the second image signal on each other is displayed with the display element.

公开(公告)号：US20210341777A1

公开(公告)日：2021-11-04

申请号：US17363552

申请日：2021-06-30

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Koji KUSUNOKI ,  Kazunori WATANABE ,  Susumu KAWASHIMA

IPC: G02F1/1368 ,  G02F1/1362 ,  H01L27/32

Abstract: A display device capable of performing image processing is provided.
Each pixel is provided with a memory circuit, and desired correction data is held in the memory circuit. The correction data is calculated in an external device and written into each pixel. The correction data is added to image data owing to capacitive coupling, and the resulting data is supplied to a display element. Thus, a corrected image can be displayed with the display element. The correction enables image upconversion or can compensate for an image quality reduction due to characteristics variations of transistors included in pixels.

公开(公告)号：US20210174734A1

公开(公告)日：2021-06-10

申请号：US16768720

申请日：2018-12-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Susumu KAWASHIMA ,  Kouhei TOYOTAKA ,  Shunpei YAMAZAKI

IPC: G09G3/32 ,  H01L25/075 ,  H01L33/32 ,  H01L27/105 ,  H01L27/12 ,  H01L29/786

Abstract: A novel display is provided. A display having a small change in chromaticity of a micro light-emitting diode in proportion to current density is provided. A display capable of reducing power consumption in the driver circuit when displaying a still image is provided. The display includes a plurality of pixels each including a display element and a microcontroller. The microcontroller includes a first transistor, a triangular wave generator circuit, a comparator, a switch, and a constant current circuit. The first transistor has a function of retaining a potential corresponding to data written to the pixel by being switched off. The triangular wave generator circuit has a function of generating a triangular wave signal. The comparator has a function of generating an output signal corresponding to the potential and the triangular wave signal. The switch has a function of controlling whether or not to make a current flowing in the constant current circuit flow to the display element in accordance with the output signal.

公开(公告)号：US20210173249A1

公开(公告)日：2021-06-10

申请号：US16771360

申请日：2018-12-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Kei TAKAHASHI ,  Shunpei YAMAZAKI

IPC: G02F1/1345 ,  G02F1/133 ,  G02F1/1368

Abstract: A liquid crystal display device including a pixel containing a first memory circuit, a second memory circuit, and a liquid crystal element is provided. The first memory circuit includes a first capacitor. One electrode of the first capacitor is electrically connected to one electrode of the liquid crystal element. The second memory circuit includes a second capacitor. One electrode of the second capacitor is electrically connected to the one electrode of the liquid crystal element. The first memory circuit has a function of storing a charge corresponding to a first signal. The second memory circuit has a function of storing a charge corresponding to a second signal. A voltage is applied to the liquid crystal element by supplying a third signal to the other electrode of the first capacitor and supplying a fourth signal to the other electrode of the second capacitor, whereby an image is displayed.

公开(公告)号：US20200258921A1

公开(公告)日：2020-08-13

申请号：US16760495

申请日：2018-10-29

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Susumu KAWASHIMA ,  Koji KUSUNOKI ,  Kazunori WATANABE

IPC: H01L27/12 ,  G09G3/36 ,  H03M1/68

Abstract: To provide a display device having a small circuit area and low power consumption. The display device includes a semiconductor device and a D/A converter circuit, and the semiconductor device includes first to third transistors and first and second capacitors. A first terminal of the first transistor is electrically connected to a first terminal of the first capacitor. A first terminal of the second transistor is electrically connected to a gate of the third transistor, a second terminal of the first capacitor, and a first terminal of the second capacitor. A first terminal of the third transistor is electrically connected to a second terminal of the second capacitor. An output terminal of the D/A converter circuit is electrically connected to a second terminal of the first transistor and a second terminal of the second transistor. Supply of a potential to the first terminal of the first capacitor changes(finely adjusts) the potential of the gate of the third transistor to be more precise than a potential that can be output from the D/A converter circuit.

公开(公告)号：US20160179259A1

公开(公告)日：2016-06-23

申请号：US14949961

申请日：2015-11-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kazunori WATANABE ,  Kensuke YOSHIZUMI

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0412 ,  G06F3/044 ,  G06F2203/04103 ,  G06F2203/04112

Abstract: An input device or an input/output device with higher sensing accuracy is provided. An input device or an input/output device with higher detection sensitivity is provided. A display device or an input/output device with high visibility is provided. A plurality of conductive layers arranged in a matrix has an outline including a linear portion parallel to a direction along an outline of a display region of a display portion and linear portions of adjacent two conductive layers face each other. Furthermore, in the plurality of conductive layers arranged in a matrix, a plurality of conductive layers arranged in a line in an oblique direction to the outline of the display portion are electrically connected to each other. Alternatively, a plurality of conductive layers arranged in a zigzag line along the outline of the display portion are electrically connected to each other.

Abstract translation: 提供了具有更高感测精度的输入设备或输入/输出设备。 提供具有较高检测灵敏度的输入装置或输入/输出装置。 提供具有高能见度的显示装置或输入/输出装置。 布置在矩阵中的多个导电层具有包括平行于显示部分的显示区域的轮廓的方向的直线部分和相邻的两个导电层的线性部分彼此面对的轮廓。 此外，在以矩阵形式排列的多个导电层中，与显示部的轮廓相对于倾斜方向排成一行的多个导电层电连接。 或者，沿着显示部的轮廓以Z字形线布置的多个导电层彼此电连接。