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公开(公告)号：US20230350256A1
公开(公告)日：2023-11-02
申请号：US18202557
申请日：2023-05-26
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kouhei TOYOTAKA , Kazunori WATANABE , Susumu KAWASHIMA , Kei TAKAHASHI , Koji KUSUNOKI , Masataka NAKADA , Ami SATO
IPC: G02F1/1368 , G02F1/1362
CPC classification number: G02F1/1368 , G02F1/136227
Abstract: A liquid crystal display device with a high aperture ratio is provided. The display device includes a transistor, a first insulating layer, a second insulating layer, a third insulating layer, a first conductive layer, a pixel electrode, a common electrode, and a liquid crystal layer in a pixel. The first insulating layer is positioned over a channel formation region of the transistor. The first conductive layer is positioned over the first insulating layer. The second insulating layer is positioned over the transistor, the first insulating layer, and the first conductive layer. The pixel electrode is positioned over the second insulating layer, the third insulating layer is positioned over the pixel electrode, the common electrode is positioned over the third insulating layer, and the liquid crystal layer is positioned over the common electrode. The common electrode includes a region overlapping with the first conductive layer with the pixel electrode positioned therebetween. The pixel includes a first connection portion where the pixel electrode is electrically connected to the transistor and a second connection portion where the first conductive layer is electrically connected to the common electrode. The first conductive layer, the pixel electrode, and the common electrode each have a function of transmitting visible light.
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公开(公告)号：US20230326396A1
公开(公告)日：2023-10-12
申请号：US18018051
申请日：2021-07-30
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Susumu KAWASHIMA , Koji KUSUNOKI , Kazunori WATANABE , Satoshi YOSHIMOTO
IPC: G09G3/32 , H10K59/131
CPC classification number: G09G3/32 , H10K59/131 , G09G2300/0819 , G09G2300/0842 , G09G2310/02 , G09G2310/08 , G09G2330/021
Abstract: A display apparatus having a wide range of threshold voltage compensation function is provided. In the display apparatus, a p-channel transistor is used as a driving transistor of the light-emitting device. Discharging is performed through a source-drain path while constant voltage is supplied to a gate so that Vth is extracted between the gate and the source. In addition, when a drain potential is set to the sum of forward voltage and a cathode potential of the light-emitting device or a potential sufficiently lower than the sum, it is possible to continue the discharging even when Vth is positive voltage. That is, compensation can be performed even in the case where Vth variation occurs from positive voltage to negative voltage.
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公开(公告)号：US20230317733A1
公开(公告)日：2023-10-05
申请号：US18205587
申请日：2023-06-05
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Susumu KAWASHIMA , Naoto KUSUMOTO
IPC: H01L27/12 , G02F1/1362
CPC classification number: H01L27/1225 , G02F1/13624 , H01L27/124 , H01L27/1255
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.
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公开(公告)号：US20230298504A1
公开(公告)日：2023-09-21
申请号：US18201823
申请日：2023-05-25
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Susumu KAWASHIMA , Koji KUSUNOKI , Kei TAKAHASHI , Shunpei YAMAZAKI
IPC: G09G3/20 , H01L27/12 , H01L29/786 , G09G3/3233
CPC classification number: G09G3/2007 , G09G3/20 , H01L27/1225 , H01L27/1255 , H01L29/7869 , G09G3/2074 , G09G3/3233 , G09G2300/0852 , H01L27/124 , G09G2300/0417 , G09G2300/0861 , G09G2340/0428 , G09G2320/0295 , H01L29/78648 , H01L27/1207 , H04N23/50
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.
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公开(公告)号：US20230255060A1
公开(公告)日：2023-08-10
申请号：US18012079
申请日：2021-06-28
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Susumu KAWASHIMA , Koji KUSUNOKI , Kazunori WATANABE , Satoshi YOSHIMOTO
IPC: H10K59/121 , H10K59/65
CPC classification number: H10K59/1213 , H10K59/65 , H10K59/40
Abstract: A display apparatus suitable for wide-grayscale display is provided. The display apparatus includes, in a pixel, two driving transistors and a light-emitting device that are connected in series. One of the transistors is a p-channel transistor and the other of the transistors is an n-channel transistor, and switching therebetween is performed for driving. Such a configuration can inhibit the change in a gate-source voltage in display with a high grayscale level. In addition, the use of a transistor containing a metal oxide in a channel formation region as the n-channel transistor enables an increase in display characteristics in display with a low grayscale level.
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Patent Agency Ranking
公开(公告)号：US20230125324A1
公开(公告)日：2023-04-27
申请号：US17773168
申请日：2020-11-20
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Manabu SATO , Susumu KAWASHIMA , Koji KUSUNOKI , Hidenori MORI , Hironori MATSUMOTO , Daisuke KUROSAKI , Masami JINTYOU , Masataka NAKADA
IPC: H01L27/12 , H01L29/786
Abstract: A semiconductor device with high reliability is provided. The semiconductor device includes a first transistor, a second transistor, a capacitor, and first to fourth wirings. The first transistor includes a first gate and a second gate, and one of a source and a drain of the first transistor is connected to the first wiring and the second gate, and the other of the source and the drain is connected to one of a source and a drain of the second transistor and one electrode of the capacitor. A gate of the second transistor is connected to the other electrode of the capacitor, and the other of the source and the drain of the second transistor is electrically connected to the second wiring. The first wiring is supplied with a first potential, and the second wiring is supplied with a second potential and a third potential alternately. The third wiring is connected to the first gate and supplied with a first signal. The fourth wiring is connected to the gate of the second transistor and supplied with a second signal obtained by inverting the first signal.
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公开(公告)号：US20220406269A1
公开(公告)日：2022-12-22
申请号：US17893337
申请日：2022-08-23
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Susumu KAWASHIMA , Naoto KUSUMOTO
IPC: G09G3/36 , G09G3/3225 , G09G3/3275 , H01L27/12
Abstract: A display device capable of improving image quality is provided. The display device is provided with an adder circuit in and outside a display region, and the adder circuit has a function of adding a plurality of data supplied from a source driver together. Components of the adder circuit are divided and partly arranged in the display region. Thus, limitation on the size of the component included in the adder circuit can be eased, and data addition can be performed efficiently. In addition, by providing 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.
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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
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.
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公开(公告)号：US20220292871A1
公开(公告)日：2022-09-15
申请号：US17639632
申请日：2020-09-02
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Susumu KAWASHIMA , Kazunori WATANABE , Koji KUSUNOKI , Satoshi YOSHIMOTO
Abstract: To provide an imaging device having a function of biometric authentication and a function of a touch sensor or a near touch sensor. The imaging device includes pixels, current mirror circuits, and CDS circuits. The pixels, the current mirror circuits, and the CDS circuits are electrically connected to read lines. The current mirror circuit includes a first and a second transistor. One of a source and a drain of the first transistor is electrically connected to the read line, and a power supply potential is supplied to the other of a source and a drain of the second transistor. The imaging device outputs imaging data written to the pixel, as a first signal, to the read line in a first period, and then, resets the imaging data and outputs a second signal from the pixel to the read line in a second period. In the first period, a first potential is supplied to terminals, and in the second period, a second potential is supplied to terminals. A difference between the second potential and the power supply potential is greater than a difference between the first potential and the power supply potential.
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公开(公告)号：US20220254860A1
公开(公告)日：2022-08-11
申请号：US17730583
申请日：2022-04-27
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazunori WATANABE , Susumu KAWASHIMA , Koji KUSUNOKI
IPC: H01L27/32 , G09G3/3233 , G09G3/3275 , G09G3/20
Abstract: A display device that can easily achieve higher definition is provided The display device includes a pixel, a first wiring, and a second wiring. The pixel includes first to fourth transistors, a first capacitor, and a light-emitting element. One of a source and a drain of the first transistor is connected to the first wiring, and the other of the source and the drain of the first transistor is connected to a gate of the second transistor and to the first capacitor. The light-emitting element is connected to one of a source and a drain of the second transistor. The first wiring is supplied with a first data potential. The second wiring is supplied with a second data potential and a reset potential in different periods. The third transistor supplies the second data potential to the first capacitor. The fourth transistor supplies the reset potential to the light-emitting element.
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