公开(公告)号：US20220068181A1

公开(公告)日：2022-03-03

申请号：US17423237

申请日：2020-01-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazunori WATANABE ,  Susumu KAWASHIMA ,  Masataka SHIOKAWA ,  Daisuke KUBOTA ,  Jiro IMADA ,  Katsuki YANAGAWA ,  Koji KUSUNOKI

IPC: G09G3/20

Abstract: A functional panel is provided. The functional panel includes a first driver circuit, a second driver circuit, and a region. The first driver circuit supplies a first selection signal, the second driver circuit supplies a second selection signal and a third selection signal, and the region includes a pixel. The pixel includes a first pixel circuit, a light-emitting element, a second pixel circuit, and a photoelectric conversion element. The first pixel circuit is supplied with the first selection signal, the first pixel circuit obtains an image signal on the basis of the first selection signal, the light-emitting element is electrically connected to the first pixel circuit, and the light-emitting element emits light on the basis of the image signal. The second pixel circuit is supplied with the second selection signal and the third selection signal in a period during which the first selection signal is not supplied, the second pixel circuit obtains an imaging signal on the basis of the second selection signal and supplies the imaging signal on the basis of the third selection signal, and the photoelectric conversion element is electrically connected to the second pixel circuit and generates the imaging signal.

公开(公告)号：US20210366422A1

公开(公告)日：2021-11-25

申请号：US17256819

申请日：2019-06-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Susumu KAWASHIMA ,  Naoto KUSUMOTO

IPC: G09G3/36 ,  H01L27/12

Abstract: A display apparatus capable of improving image quality is provided. In the display apparatus, an adder circuit is provided inside and outside a display region, and the adder circuit has a function of adding a plurality of pieces of data supplied from a source driver. Some components of the adder circuit are separately arranged in a pixel region. Thus, limitation on the size of a component included in the adder circuit can be eased, and data addition can be performed efficiently. In addition, by providing the other components included in the adder circuit outside the display region, the number of wirings in the display region can be reduced and the aperture ratio of the pixel can be increased.

公开(公告)号：US20210193029A1

公开(公告)日：2021-06-24

申请号：US17271221

申请日：2019-09-03

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：US20210090513A1

公开(公告)日：2021-03-25

申请号：US16955306

申请日：2018-12-10

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Koji KUSUNOKI ,  Susumu KAWASHIMA ,  Shigeru ONOYA ,  Takahiro FUKUTOME ,  Shunpei YAMAZAKI

IPC: G09G3/36 ,  G09G3/3233 ,  G09G3/3275

Abstract: A semiconductor device includes a display device and a source driver. Each of a plurality of pixels included in the display device is supplied with a first data potential and a second data potential included in a range of a first potential or higher to a second potential or lower. The first data potential makes the pixel display an image with a first gray level. The pixel performs calculation with the first data potential and the second data potential to generate a third data potential. The third data makes the pixel display an image with a second gray level. A reference potential of the first data potential is an intermediate potential between the first potential and the second potential, and the gray level width that can be displayed by the second data potential is larger than the gray level width that can be displayed by the first data potential.

公开(公告)号：US20200372868A1

公开(公告)日：2020-11-26

申请号：US16770998

申请日：2018-12-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: G09G3/36 ,  G02F1/1368 ,  G02F1/1362 ,  H01L27/12 ,  H01L29/24 ,  H01L29/786

Abstract: An object of the present invention is to provide a display device with high display quality. The display device of the present invention includes a pixel and a source driver circuit. The pixel includes first and second transistors (21, 22), a capacitor (25), and a display element (26). The source driver circuit is electrically connected to first and second wirings (31, 32). The first wiring (31) is electrically connected to one electrode of the capacitor 25 and one electrode of the display element (26) through the first transistor (21). The second wiring (32) is electrically connected to the other electrode of the capacitor (25) and the other electrode of the display element (26) through the second transistor (22).

公开(公告)号：US20200327835A1

公开(公告)日：2020-10-15

申请号：US16756343

申请日：2018-10-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: G09G3/20 ,  H01L27/105 ,  H01L27/12 ,  H01L29/786 ,  H04N5/225

Abstract: To provide a display device capable of displaying a plurality of images by superimposition using a plurality of memory circuits provided in a pixel. A plurality of memory circuits are provided in a pixel, and signals corresponding to images for superimposition are retained in each of the plurality of memory circuits. In the pixel, the signals corresponding to the images for superimposition are added to each of the plurality of memory circuits. The signals are added to the signals retained in the memory circuits by capacitive coupling. A display element can display an image corresponding to a signal in which a signal written to a pixel through a wiring is added to the signals retained in the plurality of memory circuits. Reduction in the amount of arithmetic processing for displaying images by superimposition can be achieved.

公开(公告)号：US20200320930A1

公开(公告)日：2020-10-08

申请号：US16765496

申请日：2018-12-04

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kouhei TOYOTAKA ,  Kei TAKAHASHI ,  Susumu KAWASHIMA ,  Shunpei YAMAZAKI

IPC: G09G3/3233 ,  H01L27/32

Abstract: A semiconductor device that reduces variations in the characteristics of driving transistors and corrects image data is provided. The semiconductor device includes an image data retention portion, a correction data retention portion, a driver circuit portion, a display element, and a threshold voltage correction circuit portion. The image data retention portion has a function of retaining first image data, and the correction data retention portion has a function of retaining correction data, and a function of generating second image data corresponding to the first image data and the correction data when the first image data is retained in the image data retention portion. The driver circuit portion has a function of generating a current corresponding to the second image data and feeding the current to the display element, and the threshold voltage correction circuit portion has a function of correcting a threshold voltage of a driving transistor in the driver circuit portion. With the above structure, the semiconductor device can correct the image data, correct the threshold voltage of the driving transistor, and perform display based on the second image data.

公开(公告)号：US20200312238A1

公开(公告)日：2020-10-01

申请号：US16772912

申请日：2018-12-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: G09G3/3225 ,  H01L27/12 ,  G09G3/36

Abstract: A display device capable of improving image quality is provided.A first pixel circuit and a second pixel circuit are included; a memory node is provided in each pixel circuit and a first signal can be retained in the memory node. The first signal is added to a second signal by capacitive coupling, and then can be supplied to a display element. Thus, the display device can display a corrected image. Furthermore, the first pixel circuit and the second pixel circuit share a signal line, whereby the aperture ratio of a pixel can be increased.

公开(公告)号：US20200302889A1

公开(公告)日：2020-09-24

申请号：US16771052

申请日：2018-12-04

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: G09G3/36 ,  G09G5/393 ,  G09G3/3225 ,  G09G3/3275

Abstract: A display device with a low power consumption a small circuit area is provided. The display device includes an image signal line, an image data storage portion, a correction data storage portion, and a display element; the correction data storage portion is electrically connected to the image signal line, the image signal line is electrically connected to the image data storage portion, and the image data storage portion is electrically connected to the display element. The image signal line stores a first image data with parasitic capacitance, and the image data storage portion stores the first image data. The correction data storage portion stores a correction data, and then generates a second image data having more gradation levels using the correction data in the correction data storage portion after storing the first image data in the image data storage portion.

公开(公告)号：US20200279874A1

公开(公告)日：2020-09-03

申请号：US16755645

申请日：2018-10-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Susumu KAWASHIMA ,  Naoto KUSUMOTO

IPC: H01L27/12 ,  G02F1/1362

Abstract: A display device capable of performing proper display without image signal conversion is provided. In the case of high-resolution display, individual data is supplied to each pixel through a first signal line and a first transistor included in each pixel. In the case of low-resolution display, the same data is supplied to a plurality of pixels through a second signal line and a second transistor electrically connected to the plurality of pixels. When the number of image signals to be displayed is more than one and the image signals support different resolutions, display can be performed without up conversion or down conversion by switching an image signal supply path as described above.