公开(公告)号：US20220344443A1

公开(公告)日：2022-10-27

申请号：US17642425

申请日：2020-09-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Susumu KAWASHIMA ,  Daisuke KUBOTA ,  Taisuke KAMADA ,  Ryo HATSUMI

IPC: H01L27/32 ,  H01L51/00 ,  H01L51/50

Abstract: The resolution of a display apparatus having a light detection function is increased. A display apparatus includes a plurality of transistors and a light-emitting and light-receiving device in a subpixel. The light-emitting and light-receiving device has a function of emitting light of a first color and a function of receiving light of a second color. One of a source and a drain of a first transistor is electrically connected to a first wiring, and the other thereof is electrically connected to a gate of a second transistor. One electrode of the light-emitting and light-receiving device is electrically connected to one of a source and a drain of the second transistor, one of a source and a drain of a third transistor, and one of a source and a drain of a fifth transistor. One of a source and a drain of a fourth transistor is electrically connected to a second wiring, and the other thereof is electrically connected to the other of the source and the drain of the third transistor.

公开(公告)号：US20220294981A1

公开(公告)日：2022-09-15

申请号：US17639683

申请日：2020-09-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Daisuke KUBOTA ,  Ryo HATSUMI ,  Taisuke KAMADA

IPC: H04N5/232 ,  H04N5/225 ,  G06T5/00 ,  G06T5/50 ,  H01L27/28

Abstract: A thin lightweight imaging device is provided. A highly convenient imaging device is provided. The imaging unit includes an imaging unit, a memory, and an arithmetic circuit. The imaging unit includes a light-receiving device, a first light-emitting device, and a second light-emitting device. The first light-emitting device has a function of emitting light in a wavelength range that is different from a wavelength range of light emitted by the second light-emitting device. The imaging unit has a function of making the first light-emitting device emit light and acquiring first image data. The imaging unit has a function of making the second light-emitting device emit light and acquiring second image data. The memory has a function of retaining the first reference data and the second reference data. The arithmetic circuit has a function of correcting the first image data with the use of the first reference data retained in the memory and calculating first correction image data. The arithmetic circuit has a function of correcting the second image data with the use of the second reference data retained in the memory and calculating second correction image data. The arithmetic circuit has a function of combining the first correction image data and the second correction image data to generate synthesized image data. The light-receiving device includes a first pixel electrode, and the first light-emitting device includes a second pixel electrode on the same plane as the first pixel electrode.

公开(公告)号：US20220285461A1

公开(公告)日：2022-09-08

申请号：US17632340

申请日：2020-07-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Ryo Hatsumi ,  Taisuke KAMADA ,  Kazunori WATANABE ,  Daisuke KUBOTA

IPC: H01L27/32 ,  G06F21/32

Abstract: A display device having both a function of a touch sensor and a function of fingerprint recognition is provided. The display device includes a first display region and a second display region. The first display region and the second display region are provided in contact with each other. The first display region includes a plurality of first light-emitting elements and a plurality of first photodetectors. The second display region includes a plurality of second light-emitting elements and a plurality of second photodetectors. The first photodetector has a function of receiving first light emitted from the first light-emitting element. The second photodetector has a function of receiving second light emitted from the second light-emitting element. The first light-emitting elements and the first photodetectors are arranged in a matrix in the first display region. The second light-emitting elements and the second photodetectors are arranged in a matrix in the second display region. The second photodetectors are arranged in a higher density than the first photodetectors.

公开(公告)号：US20220246694A1

公开(公告)日：2022-08-04

申请号：US17623798

申请日：2020-06-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazunori WATANABE ,  Koji KUSUNOKI ,  Susumu KAWASHIMA ,  Taisuke KAMADA ,  Ryo HATSUMI ,  Daisuke KUBOTA

IPC: H01L27/32 ,  H01L51/52 ,  H01L51/44

Abstract: A display apparatus having a photosensing function is provided. The display apparatus includes a first pixel circuit and a second pixel circuit. The first pixel circuit includes a light-receiving device, a first transistor, and a second transistor. The second pixel circuit includes a light-emitting device. The light-receiving device includes a first pixel electrode, an active layer, and a common electrode. The light-emitting device includes a second pixel electrode, a light-emitting layer, and the common electrode. The active layer is positioned over the first pixel electrode and includes a first organic compound. The light-emitting layer is positioned over the second pixel electrode and includes a second organic compound different from the first organic compound. The common electrode includes a portion overlapping with the first pixel electrode with the active layer therebetween and a portion overlapping with the second pixel electrode with the light-emitting layer therebetween. The first transistor includes low-temperature polysilicon as a semiconductor layer and the second transistor includes a metal oxide as a semiconductor layer.

公开(公告)号：US20210096678A1

公开(公告)日：2021-04-01

申请号：US17026446

申请日：2020-09-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Daisuke KUBOTA ,  Ryo HATSUMI ,  Taisuke KAMADA ,  Koji KUSUNOKI ,  Kazunori WATANABE ,  Susumu KAWASHIMA ,  Kensuke YOSHIZUMI

IPC: G06F3/041 ,  G06K9/00 ,  G06F3/042

Abstract: A display device featuring a touch detection and a fingerprint imaging functions is provided. A display device includes a light-emitting element and a light-receiving element. The light-emitting element includes a first pixel electrode, a light-emitting layer, and a common electrode, and the light-receiving element includes a second pixel electrode, an active layer, and the common electrode. The first pixel electrode and the second pixel electrode are provided on the same plane. The common electrode overlaps with the first pixel electrode with the light-emitting layer therebetween, and overlaps with the second pixel electrode with the active layer therebetween. A first conductive layer, a second conductive layer, and an insulating layer are provided above the common electrode. The insulating layer is provided above the first conductive layer, and the second conductive layer is provided above the insulating layer. The light-receiving element has a function of receiving light emitted from the light-emitting element.

公开(公告)号：US20210005669A1

公开(公告)日：2021-01-07

申请号：US16914530

申请日：2020-06-29

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Taisuke KAMADA ,  Ryo HATSUMI ,  Daisuke KUBOTA ,  Naoaki HASHIMOTO ,  Tsunenori SUZUKI ,  Harue OSAKA ,  Satoshi SEO

IPC: H01L27/28 ,  H01L27/30 ,  H01L27/32 ,  H01L51/50 ,  H01L51/52

Abstract: An object is to provide a highly reliable display unit having a function of sensing light. The display unit includes a light-receiving device and a light-emitting device. The light-receiving device includes an active layer between a pair of electrodes. The light-emitting device includes a hole-injection layer, a light-emitting layer, and an electron-transport layer between a pair of electrodes. The light-receiving device and the light-emitting device share one of the electrodes, and may further share another common layer between the pair of electrodes. The hole-injection layer is in contact with an anode and contains a first compound and a second compound. The electron-transport property of the electron-transport layer is low; hence, the light-emitting layer is less likely to have excess electrons. Here, the first compound is the material having a property of accepting electrons from the second compound.