Abstract: Provided is a highly reliable semiconductor device. The present invention relates to a shift register circuit including a plurality of stages of sequential circuits. An output signal of a sequential circuit is input to a sequential circuit in the subsequent stage. Before a sequential circuit outputs a signal and after the sequential circuit outputs the signal, the potential of a gate of a transistor included in the sequential circuit is changed in accordance with a clock signal so as to avoid voltage stress application between the gate and a source of the transistor for a long time. The shift register circuit can be applied to a scan line driver circuit of a display apparatus, for example.

Abstract: A semiconductor device having a light sensing function and including a high-resolution display portion is provided. The semiconductor device includes a plurality of pixels, and the pixels each include first and second light-receiving devices, first to fifth transistors, a capacitor, and a first wiring. One electrode of the first light-receiving device is electrically connected to the first wiring, and the other electrode is electrically connected to one of a source and a drain of the first transistor. One electrode of the second light-receiving device is electrically connected to the first wiring, and the other electrode is electrically connected to one of a source and a drain of the second transistor. The other of the source and the drain of the second transistor is electrically connected to the other of the source and the drain of the first transistor.

Abstract: Display data of pixels is updated at different timings. A scan line is connected to a first pixel and a second pixel, a first wiring is connected to the first pixel, and a second wiring is connected to the second pixel. In a first period, a signal for selecting the first pixel and the second pixel is supplied to the scan line. Setting data for setting a state where the display data of the first pixel is updated is supplied to the first wiring, and setting data for setting a state where the display data of the second pixel is updated is supplied to the second wiring. In a second period, a signal for selecting the first pixel and the second pixel is supplied to the scan line. Setting data for setting a state where the display data of the first pixel is not updated is supplied to the first wiring, and the setting data for setting the state where the display data of the second pixel is updated is supplied to the second wiring.

Abstract: A high-resolution display device with reduced display unevenness is provided. In the display device, a plurality of pixels are included over a substrate; each of the plurality of pixels includes a transistor and a light-emitting element; the light-emitting element includes a first electrode, an EL layer over the first electrode, and a second electrode over the EL layer; the first electrode is electrically connected to the transistor; in the plurality of pixels, the first electrodes in adjacent pixels are separated by an insulating layer; the second electrode includes a conductive material having light-transmitting property with respect to visible light; the second electrode of each of the plurality of pixels is shared; and light is emitted from the second electrode side. A wiring is included; in a plane view with respect to the substrate, the wiring is placed in a region where the EL layer is not placed; and the second electrode is placed over and in contact with the wiring.

Abstract: A semiconductor device including a biometric recognition function and a touch sensor or near touch sensor function is provided. The semiconductor device includes a light-emitting device and an imaging device. The imaging device includes a gate driver circuit and m rows of pixels (m is an integer more than or equal to 2). The gate driver circuit includes a plurality of first register circuits and second register circuits whose number is less than that of the first register circuits. The first register circuits are connected with each other in series and the second register circuits are connected with each other in series. The gate driver circuit has a function of operating in the first mode and the second mode. In the first mode, the first register circuits are in the on state and the second register circuits are in the off state, and in the second mode, the second register circuits are in the on state and the first register circuits are in the off state.

Abstract: A semiconductor device capable of performing authentication in a short time can be provided. The semiconductor device includes a light-emitting unit and an imaging unit. The imaging unit includes a row driver circuit, and the row driver circuit includes first to m latch circuits (m is an integer greater than or equal to 2) and first to m register circuits. A first start pulse signal is input to a first latch circuit and second start pulse signals are input to first to m latch circuits. Scan signals output from the first to (m?1)-th register circuits are input to the second to m-th latch circuits, respectively. The first latch circuit has a function of outputting one of the first start pulse signal and the second start pulse signal to the first register circuit on the basis of data held, and the second to m-th latch circuits have a function of outputting one of the scan signal and the second start pulse signal to the second to m-th register circuits on the basis of data held.

Abstract: One embodiment of the present invention relates to a common semiconductor apparatus for driving two different circuits. The semiconductor apparatus is capable of switching a plurality of signal potentials and sequentially outputting the plurality of signal potentials to the outside. The semiconductor apparatus can make one of two different circuits arranged in a matrix operate in all the rows and can make the other circuit operate in all the rows or only in a specific row. For example, in the case where the semiconductor apparatus is applied to a row driver that drives pixels of a display device in which sensor elements are incorporated, the operation of display elements in pixels in all the rows and the operation of sensor elements in pixels in all the rows or in the specific row can be switched.

Abstract: A display apparatus including a pixel circuit that generates a PWM signal is provided. In the display apparatus, a pixel has a function of generating a PWM signal. The PWM signal can be generated by an operation of comparing gate-source voltage or on-state resistance of each of two transistors provided in the pixel. Light emission of a light-emitting device such as a micro LED or an organic EL element is controlled with a duty ratio using the generated PWM signal. The PWM signal is generated in a circuit formed of a small number of transistors, which is effective in increasing the definition and the area of the display apparatus.

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.

Abstract: A highly functional semiconductor device is provided. The semiconductor device includes a first transistor and a second transistor. The first transistor includes a first semiconductor layer, a first gate electrode, a first electrode, and a second electrode. The second transistor includes a second semiconductor layer, a second gate electrode, a third electrode, and a fourth electrode. The first gate electrode and the second gate electrode are connected to each other, and the second electrode and the third electrode are connected to each other. A first insulating layer, a second insulating layer, and a second semiconductor layer are stacked over the first semiconductor layer. The first insulating layer is less likely to diffuse hydrogen than the second insulating layer. The second insulating layer contains oxide, the first semiconductor layer contains polycrystalline silicon, and the second semiconductor layer contains a metal oxide.

Abstract: A semiconductor device including a biometric recognition function and a touch sensor or near touch sensor function is provided. The semiconductor device includes a light-emitting device and an imaging device. The imaging device includes a gate driver circuit and m rows of pixels (m is an integer more than or equal to 2). The gate driver circuit includes a plurality of first register circuits and second register circuits whose number is less than that of the first register circuits. The first register circuits are connected with each other in series and the second register circuits are connected with each other in series. The gate driver circuit has a function of operating in the first mode and the second mode. In the first mode, the first register circuits are in the on state and the second register circuits are in the off state, and in the second mode, the second register circuits are in the on state and the first register circuits are in the off state.

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.

Abstract: A display apparatus having a noncontact input function is provided. The display apparatus has a first function of detecting, with a light-receiving device, light irradiated from a light source outside a display portion and blocked by a pointing object to recognize the position pointed by the pointing object, and a second function of detecting, with the light-receiving device, light irradiated from a light source inside or outside the display portion and reflected by the pointing object to recognize the position pointed by the pointing object. The display apparatus can operate by switching the first function and the second function in accordance with the intensity of the light irradiated from the light source outside the display portion.

Abstract: Display data of pixels is updated at different timings. A scan line is connected to a first pixel and a second pixel, a first wiring is connected to the first pixel, and a second wiring is connected to the second pixel. In a first period, a signal for selecting the first pixel and the second pixel is supplied to the scan line. Setting data for setting a state where the display data of the first pixel is updated is supplied to the first wiring, and setting data for setting a state where the display data of the second pixel is updated is supplied to the second wiring. In a second period, a signal for selecting the first pixel and the second pixel is supplied to the scan line. Setting data for setting a state where the display data of the first pixel is not updated is supplied to the first wiring, and the setting data for setting the state where the display data of the second pixel is updated is supplied to the second wiring.

Abstract: A magnetic coupling device includes a driving magnet array having multiple annular sector-shaped, circumferentially arranged first permanent magnets, and a driven magnet array having multiple circular sector-shaped, circumferentially arranged second permanent magnets with pole surfaces facing pole surfaces of the first permanent magnets. The driven magnet array is rotated by the driving magnet array being rotated. A repulsion zone where a repulsive force acts is designed to have an area that is 5% to 15% of that of an attraction zone where an attractive force acts between a specific first permanent magnet and a specific second permanent magnet, with a radial first centerline of the specific first permanent magnet overlapping a radial second centerline of the specific second permanent magnet so that opposite poles face each other, including between first and second permanent magnets respectively adjacent the specific first and second permanent magnets with overlapping the centerlines.

Abstract: A display apparatus capable of performing authentication in a short time is provided. The display apparatus includes a first display portion where first pixels are arranged in a matrix, a second display portion where second pixels are arranged in a matrix, first and second row driver circuits, and a control circuit. Each of the first and the second pixels includes a light-receiving element. The first and the second pixels each have a function of acquiring imaging data by using the light-receiving element. The first and the second row driver circuits each have a function of selecting the first and the second pixels which read out the imaging data. The control circuit has a function of sequentially driving the first and the second row driver circuits in a first mode, and has a function of driving one of the first and the second row driver circuits on the basis of the imaging data in the second mode.

Abstract: A semiconductor device including a biometric recognition function and a touch sensor or near touch sensor function is provided. The semiconductor device includes a light-emitting device and an imaging device. The imaging device includes a gate driver circuit and m rows of pixels (m is an integer more than or equal to 2). The gate driver circuit includes a plurality of first register circuits and second register circuits whose number is less than that of the first register circuits. The first register circuits are connected with each other in series and the second register circuits are connected with each other in series. The gate driver circuit has a function of operating in the first mode and the second mode. In the first mode, the first register circuits are in the on state and the second register circuits are in the off state, and in the second mode, the second register circuits are in the on state and the first register circuits are in the off state.

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.

Abstract: A magnetic coupling device includes a driving magnet array having multiple annular sector-shaped, circumferentially arranged first permanent magnets, and a driven magnet array having multiple circular sector-shaped, circumferentially arranged second permanent magnets with pole surfaces facing pole surfaces of the first permanent magnets. The driven magnet array is rotated by the driving magnet array being rotated. A repulsion zone where a repulsive force acts is designed to have an area that is 5% to 15% of that of an attraction zone where an attractive force acts between a specific first permanent magnet and a specific second permanent magnet, with a radial first centerline of the specific first permanent magnet overlapping a radial second centerline of the specific second permanent magnet so that opposite poles face each other, including between first and second permanent magnets respectively adjacent the specific first and second permanent magnets with overlapping the centerlines.

Abstract: A novel information processing device that is highly convenient or reliable is provided. The information processing device includes a sensor portion, a communication portion, a display portion, and an arithmetic device; the sensor portion has a function of obtaining position information, and the communication portion has a function of obtaining map information and legal speed limit information. The arithmetic device identifies first legal speed limit information from the map information on the basis of the position information, the arithmetic device generates first image information including the first legal speed limit information, and the display portion has a function of displaying the first image information.