Abstract: A novel display apparatus is provided. The display apparatus includes a first layer including a plurality of pixel circuits, a second layer provided over the first layer, a plurality of optical lenses provided over the second layer, a display region, and a plurality of light-receiving regions. The display region includes a first pixel circuit provided in the first layer and a light-emitting device provided in the second layer. The light-receiving region includes a second pixel circuit provided in the first layer and a light-receiving device provided in the second layer. The plurality of light-receiving regions are provided around the display region. The optical lens is provided at a position overlapping with the light-receiving region.

Abstract: A document retrieval system that retrieves documents, with concepts of the documents taken into account, is provided. The document retrieval system (100) includes an input unit (101), a first processing unit (102), a storage unit (105), a second processing unit (103), and an output unit (104). The input unit (101) has a function of inputting a first document (20), the first processing unit (102) has a function of creating a first graph structure (21) from the first document (20), the storage unit (105) has a function of storing a second graph structure (11), the second processing unit (103) has a function of calculating a similarity between the first graph structure (21) and the second graph structure (11), the output unit (104) has a function of supplying information, the first processing unit (102) has a function of dividing the first document (20) into a plurality of tokens, a node and an edge of the first graph structure (21) have a label, and the label includes the plurality of tokens.

Abstract: A novel semiconductor device is provided. A structure body extending in a first direction, a first conductor extending in a second direction, and a second conductor extending in the second direction are provided. In a first intersection portion where the structure body and the first conductor intersect with each other, a first insulator, a first semiconductor, a second insulator, a second semiconductor, a third insulator, a fourth insulator, and a fifth insulator are provided concentrically around a third conductor. In a second intersection portion where the structure body and the second conductor intersect with each other, the first insulator, the first semiconductor, the second insulator, a fourth conductor, the second semiconductor, and the third insulator are provided concentrically around the third conductor.

Abstract: Environmental information is managed by a neural network. An image detection module includes a first neural network, a first communication module, a first position sensor, a first processor, and a passive element. The first neural network includes an imaging device. The imaging device has a function of obtaining an image, and the first position sensor has a function of detecting positional information on where the image is obtained. When the first neural network determines whether the image has learned features, the first processor can transmit the positional information on where the image is obtained. The first processor receives a detection result through the first communication module, and the first processor can operate the passive element in accordance with the detection result.

Abstract: A data processing system, a data processing device, and a data processing method are provided. The data processing system includes a wearable device including a display means and an imaging means and a database that is connected to the wearable device through a network. The database includes at least one of pieces of information on a cooking recipe, a cooking method, and a material. The wearable device detects a first material by the imaging means. The wearable device collects information on the first material from the database. When the first material exists in a specific region in an imaging range of the imaging means, the information on the first material is displayed on the display means. When the first material does not exist in the specific region, the information on the first material is not displayed on the display means.

Abstract: A downsized electronic device with an eye tracking function is provided. The electronic device with an eye tracking function includes a display device, an infrared light source, and an optical system. The display device includes a display element and a light-receiving element; the infrared light source has a function of emitting infrared light; the light-receiving element has a function of detecting the infrared light reflected by an eyeball; and the optical system includes a first optical element positioned on an optical path through which an image from the display element enters the eyeball and a second optical element positioned on an optical path through which the reflected infrared light enters the light-receiving element. The light-receiving element is integrated with the display device and thus, the electronic device can have a reduced size.

Abstract: It is an object to provide a highly reliable thin film transistor with stable electric characteristics, which includes an oxide semiconductor film. The channel length of the thin film transistor including the oxide semiconductor film is in the range of 1.5 ?m to 100 ?m inclusive, preferably 3 ?m to 10 ?m inclusive; when the amount of change in threshold voltage is less than or equal to 3 V, preferably less than or equal to 1.5 V in an operation temperature range of room temperature to 180° C. inclusive or ?25° C. to 150° C. inclusive, a semiconductor device with stable electric characteristics can be manufactured. In particular, in a display device which is an embodiment of the semiconductor device, display unevenness due to variation in threshold voltage can be reduced.

Abstract: To reduce oxygen vacancies in an oxide semiconductor film and the vicinity of the oxide semiconductor film and to improve electric characteristics of a transistor including the oxide semiconductor film. A semiconductor device includes a gate electrode whose Gibbs free energy for oxidation is higher than that of a gate insulating film. In a region where the gate electrode is in contact with the gate insulating film, oxygen moves from the gate electrode to the gate insulating film, which is caused because the gate electrode has higher Gibbs free energy for oxidation than the gate insulating film. The oxygen passes through the gate insulating film and is supplied to the oxide semiconductor film in contact with the gate insulating film, whereby oxygen vacancies in the oxide semiconductor film and the vicinity of the oxide semiconductor film can be reduced.

Abstract: A semiconductor device with a high driving speed is provided. The semiconductor device includes first to fourth cells, a converter circuit, and first to fourth wirings. The first and second cells make a first current and a second current each corresponding to the product of first data and second data flow in the first wiring and the second wiring, respectively. The third and fourth cells make base currents in the same amount flow in the first and second wirings. The converter circuit outputs, from an output terminal thereof, a voltage corresponding to the differential current between the sum of the first current and the base current flowing in the first wiring and the sum of the second current and the base current flowing in the second wiring.

Abstract: An imaging device with a novel structure is provided. The imaging device includes an imaging region provided with a plurality of pixels. The plurality of pixels included in the imaging region include a first pixel and a second pixel. The imaging device has a function of selecting a first region or a second region. The first region includes the same number of pixels as the second region. The first region includes at least the first and second pixels. The second region includes at least the second pixel. The pixels included in the first region or the second region have a function of outputting imaging signals obtained by the pixels. The imaging device generates first image data by concurrently reading the imaging signals output from the pixels included in the first region and performing arithmetic operation on the signals.

Abstract: To provide a novel electronic device. The electronic device includes a housing and a display device. The display device includes a first layer, a second layer, and a third layer. The first layer, the second layer, and the third layer are provided in different layers. The first layer includes a driver circuit and an arithmetic circuit. The second layer includes pixel circuits and a cell array. The third layer includes light-receiving devices and light-emitting devices. The pixel circuits each have a function of controlling light emission of the light-emitting device. The driver circuit has a function of controlling the pixel circuits. The arithmetic circuit has a function of performing arithmetic processing on the basis of first data corresponding to currents output from the light-receiving devices and second data corresponding to a potential held in the cell array.

Abstract: A highly reliable memory device is provided. On a side surface of a first conductor extending in a first direction, a first insulator, a first semiconductor, a second insulator, a second semiconductor, and a third insulator are provided in this order when seen from the first conductor side. A first region overlapping with a second conductor with the first insulator, the first semiconductor, the second insulator, the second semiconductor, and the third insulator therebetween, and a second region overlapping with a third conductor with the first insulator, the first semiconductor, the second insulator, the second semiconductor, and the third insulator therebetween are provided in the first conductor. In the second region, a fourth conductor is provided between the first insulator and the first semiconductor.

Abstract: Environmental information is managed by a neural network. An image detection module includes a first neural network, a first communication module, a first position sensor, a first processor, and a passive element. The first neural network includes an imaging device. The imaging device has a function of obtaining an image, and the first position sensor has a function of detecting positional information on where the image is obtained. When the first neural network determines whether the image has learned features, the first processor can transmit the positional information on where the image is obtained. The first processor receives a detection result through the first communication module, and the first processor can operate the passive element in accordance with the detection result.

Abstract: An authentication system for an electronic device with a high security level is provided. The authentication system includes a data retention means that accumulates first data related to a state of the electronic device being used by a first user registered in advance and generates a first data group, a first authentication means that authenticates a second user operating the electronic device as the first user and releases a locked state, a data acquisition means that acquires second data related to a state of the electronic device being used by the second user in a state where the locked state is released, and a second authentication means that authenticates the second user as the first user on the basis of the first data group and the second data and sets the electronic device to the locked state when the second user is not authenticated. The data retention means has a function of deleting the oldest first data of the plurality of pieces of the first data included in the first data group.

Abstract: A search system and a search method are provided. The search system includes a means to input first circuit diagram information to a terminal, a database in which second circuit diagram information is registered, a means to convert the input first circuit diagram information into a first graph, an arithmetic means to calculate similarity between the first graph and a second graph based on the second circuit diagram information, and a means to display the similarity on the terminal.

Abstract: A semiconductor device in which a circuit and a power storage element are efficiently placed is provided. The semiconductor device includes a first transistor, a second transistor, and an electric double-layer capacitor. The first transistor, the second transistor, and the electric double-layer capacitor are provided over one substrate. A band gap of a semiconductor constituting a channel region of the second transistor is wider than a band gap of a semiconductor constituting a channel region of the first transistor. The electric double-layer capacitor includes a solid electrolyte.

Abstract: A semiconductor device in which a circuit and a battery are efficiently stored is provided. In the semiconductor device, a first transistor, a second transistor, and a secondary battery are provided over one substrate. A channel region of the second transistor includes an oxide semiconductor. The secondary battery includes a solid electrolyte, and can be fabricated by a semiconductor manufacturing process. The substrate may be a semiconductor substrate or a flexible substrate. The secondary battery has a function of being wirelessly charged.

Abstract: A semiconductor device in which a circuit and a battery are efficiently stored is provided. In the semiconductor device, a first transistor, a second transistor, and a secondary battery are provided over one substrate. A channel region of the second transistor includes an oxide semiconductor. The secondary battery includes a solid electrolyte, and can be fabricated by a semiconductor manufacturing process. The substrate may be a semiconductor substrate or a flexible substrate. The secondary battery has a function of being wirelessly charged.

Abstract: An inspection device capable of sensing an abnormality included in an image with high accuracy is provided. The inspection device includes an electron microscope, an image processing device, and a calculator. The electron microscope has a function of generating a signal corresponding to a surface shape of a sample over a stage. The image processing device has a function of generating a first image corresponding to the signal. The calculator includes a circuit in which a neural network is formed, and has a function of obtaining a second image on the basis of the first image using the neural network. The calculator has a function of obtaining a third image by performing smoothing processing on the first image and a function of obtaining a fourth image by performing smoothing processing on the second image. The calculator has a function of obtaining a fifth image by obtaining a difference between the third image and the fourth image.

Abstract: A semiconductor device in which a circuit and a power storage element are efficiently placed is provided. The semiconductor device includes a first transistor, a second transistor, and an electric double-layer capacitor. The first transistor, the second transistor, and the electric double-layer capacitor are provided over one substrate. A band gap of a semiconductor constituting a channel region of the second transistor is wider than a band gap of a semiconductor constituting a channel region of the first transistor. The electric double-layer capacitor includes a solid electrolyte.