Abstract: An object is to provide a display device having a function of emitting visible light and infrared light and an imaging function. Another object is to increase the definition without changing the density of imaging elements while the high resolution of an image displayed on a display device is kept. The display device has a layout in which a light-receiving region of an imaging element is provided between light-emitting regions of a plurality of light-emitting elements over one substrate. In the imaging function of the display device, as a means for increasing the definition of a captured image, the definition is increased without changing the density of imaging elements by capturing an image by time division.

Abstract: A display device having a function of sensing light is provided. The display device includes a first substrate, a second substrate, a light-receiving element, a light-emitting element, a resin layer, and a light shielding layer. The light-receiving element, the light-emitting element, the resin layer, and the light shielding layer are each positioned between the first substrate and the second substrate. The light-receiving element includes a first pixel electrode over the first substrate, an active layer over the first pixel electrode, and a common electrode over the active layer. The light-emitting element includes a second pixel electrode over the first substrate, a first light-emitting layer over the second pixel electrode, and the common electrode over the first light-emitting layer. The resin layer and the light shielding layer are each positioned between the common electrode and the second substrate. The resin layer includes a portion overlapping with the light-emitting element.

Abstract: A display device having a light detection function is provided. A highly convenient display device is provided. The display device includes a light-receiving element, a first light-emitting element, and a second light-emitting element in a display portion. The light-receiving element includes a first pixel electrode, an active layer, and a common electrode. The first light-emitting element includes a second pixel electrode, a first light-emitting layer, and the common electrode. The second light-emitting element includes a third pixel electrode, a second light-emitting layer, and the common electrode. The active layer includes an organic compound. The active layer is positioned between the first pixel electrode and the common electrode. The first light-emitting layer is positioned between the second pixel electrode and the common electrode. The second light-emitting layer is positioned between the third pixel electrode and the common electrode.

Abstract: A display device having a non-contact input function without contact is provided. A first light-emitting device that performs display, a second light-emitting device that emits light for detection, and a light-receiving device are included, and the light-receiving device has a function of detecting light that has been emitted by the second light-emitting device and reflected by an object. Near-infrared light, which has substantially no visibility, is used as the light emitted by the second light-emitting device. Therefore, the light emitted from a display portion even at high luminance does not affect visual recognition of the display. In addition, when the light is emitted at high luminance, an object that is positioned away from the display device can be detected with high sensitivity.

Abstract: A display device that has a function of emitting visible light and infrared light and a function of detecting light. The display device is a display device including a first light-emitting device, a second light-emitting device, and a light-receiving device, in a display portion. The first light-emitting device includes a first pixel electrode, a first optical adjustment layer, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a second optical adjustment layer, the first light-emitting layer, the second light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The active layer includes an organic compound. The first light-emitting device emits infrared light emitted by the first light-emitting layer. The second light-emitting device emits visible light emitted by the second light-emitting layer.

Abstract: A display device having a photosensing function is provided. A display device having a biometric authentication function typified by fingerprint authentication is provided. A display device having both a touch panel function and a biometric authentication function is provided. The display device includes a first substrate, a light guide plate, a first light-emitting element, a second light-emitting element, and a light-receiving element. The first substrate and the light guide plate are provided to face each other. The first light-emitting element and the light-receiving element are provided between the first substrate and the light guide plate. The first light-emitting element has a function of emitting first light through the light guide plate. The second light-emitting element has a function of emitting second light to a side surface of the light guide plate. The light-receiving element has a function of receiving the second light and converting the second light into an electric signal.

Abstract: A display device having a photosensing function is provided. A display device having a biometric authentication function typified by fingerprint authentication is provided. A display device having a touch panel function and a biometric authentication function is provided. The display device includes a first substrate, a light guide plate, a first light-emitting element, a second light-emitting element, and a light-receiving element. The first substrate and the light guide plate are provided to face each other. The first light-emitting element and the light-receiving element are provided between the first substrate and the light guide plate. The first light-emitting element has a function of emitting first light through the light guide plate. The second light-emitting element has a function of emitting second light to a side surface of the light guide plate.

Abstract: A display device having a biometric authentication function is provided. A highly convenient display device is provided. The display device includes a first substrate, a light guide plate, a plurality of first light-emitting elements, a second light-emitting element, and a plurality of light-receiving elements. The light guide plate includes a first portion having a first surface and a second portion having a second surface that connects with the first surface and has a different normal direction from the first surface. The first light-emitting elements and the light-receiving elements are provided between the first substrate and the light guide plate. The first light-emitting elements have a function of emitting first light through the light guide plate, and the second light-emitting element has a function of emitting second light to a side surface of the light guide plate. The light-receiving elements have a function of receiving the second light and converting the second light to an electric signal.

Abstract: A display apparatus having a function of emitting visible light and infrared light and a light detection function is provided. The display apparatus includes a first light-emitting device, a second light-emitting device, and a light-receiving device in a display portion. The first light-emitting device emits both visible light and infrared light and the second light-emitting device emits visible light. The light-receiving device has a function of absorbing at least part of visible light and infrared light. The first light-emitting device includes a first pixel electrode, a first light-emitting layer, a second light-emitting layer, and a common electrode. The second light-emitting device includes a second pixel electrode, a third light-emitting layer, and the common electrode. The light-receiving device includes a third pixel electrode, an active layer, and the common electrode. The first light-emitting layer includes a light-emitting material emitting infrared light.

Abstract: A display device having a photosensing function is provided. A highly convenient display device is provided. The display device includes a light-receiving element and a light-emitting element in a display portion. The light-receiving element includes a first pixel electrode, an active layer, and a common electrode. The light-emitting element includes a second pixel electrode, a light-emitting layer, and a common electrode. The active layer is positioned over the first pixel electrode. The active layer contains a first organic compound. The light-emitting layer is positioned over the second pixel electrode. The light-emitting layer contains 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 provided therebetween, and a portion overlapping with the second pixel electrode with the light-emitting layer provided therebetween.

Abstract: A display device having a function of sensing light is provided. A highly convenient display device is provided. The display device includes a first substrate, a second substrate, a light-receiving element, a transistor, and a light-emitting element in a display portion. The light-receiving element, the transistor, and the light-emitting element are each positioned between the first substrate and the second substrate. The light-receiving element is positioned closer to the first substrate than the transistor is. The light-emitting element is positioned closer to the second substrate than the transistor is. The light-receiving element includes a layer containing an organic compound. The transistor is electrically connected to the light-emitting element. The display device preferably further includes a lens and light transmitted through the lens preferably enters the light-receiving element.

Abstract: To provide a novel display panel that is highly convenient or reliable. To provide a novel input and output device that is highly convenient or reliable. To provide a novel data processing device that is highly convenient or reliable. To provide a method for manufacturing a novel display panel that is highly convenient or reliable. The display panel includes a pixel, a third conductive film electrically connected to the pixel, an insulating film including an opening portion overlapping with the third conductive film, and an electrode including a first region in contact with the third conductive film and a second region functioning as a contact point.

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.

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.

Abstract: A flexible display device is manufactured with high yield. A display device having high resistance to repeated bending is provided. The display device is manufactured by forming a separation layer over a support substrate; forming, over the separation layer, an inorganic insulating layer including a first portion and a second portion; forming a display element over the inorganic insulating layer to be overlapped with the first portion; forming a connection electrode over the inorganic insulating layer to be overlapped with the second portion; sealing the display element; separating the support substrate and the inorganic insulating layer using the separation layer; attaching a substrate to the inorganic insulating layer to be overlapped with the first portion; and etching the second portion using the substrate as a mask to expose the connection electrode.

Abstract: To provide a novel display panel that is highly convenient or reliable. To provide a novel input and output device that is highly convenient or reliable. To provide a novel data processing device that is highly convenient or reliable. To provide a method for manufacturing a novel display panel that is highly convenient or reliable. The display panel includes a pixel, a third conductive film electrically connected to the pixel, an insulating film including an opening portion overlapping with the third conductive film, and an electrode including a first region in contact with the third conductive film and a second region functioning as a contact point.

Abstract: To provide a novel display panel that is highly convenient or reliable. To provide a novel input and output device that is highly convenient or reliable. To provide a novel data processing device that is highly convenient or reliable. To provide a method for manufacturing a novel display panel that is highly convenient or reliable. The display panel includes a pixel, a third conductive film electrically connected to the pixel, an insulating film including an opening portion overlapping with the third conductive film, and an electrode including a first region in contact with the third conductive film and a second region functioning as a contact point.

Abstract: The present invention provides a polyvinyl alcohol-based ion-exchange membrane having practical dimensional stability and electrodialysis performance, and a method for producing the ion-exchange membrane. The present invention relates to an ion-exchange membrane which gives an infrared absorption spectrum that satisfies the relationship (A): 30?{Z?(X+Y)×30/2}/T??(A) wherein X is the absorbance at an absorption wavelength of 1690 cm?1, Y is the absorbance at an absorption wavelength of 1720 cm?1, Z is the integral value for the region lying between absorption wavelengths of 1690 cm?1 and 1720 cm1, and T (cm) is the thickness of the ion-exchange membrane.

Abstract: To provide a display device with high reliability. To provide a repeatedly bendable flexible display. A first substrate, a second substrate, a display element, a light-blocking layer, a first barrier layer, and an adhesive layer are included. The first substrate and the second substrate face each other. The display element, the light-blocking layer, the first barrier layer, and the adhesive layer are between the first substrate and the second substrate. The display element is between the first substrate and the adhesive layer. The light-blocking layer is between the second substrate and the adhesive layer. The first barrier layer includes a region between the light-blocking layer and the adhesive layer. The first barrier layer includes a material having a higher Young's modulus than the light-blocking layer or the adhesive layer.

Abstract: To provide a novel display panel that is highly convenient or reliable. To provide a novel input and output device that is highly convenient or reliable. To provide a novel data processing device that is highly convenient or reliable. To provide a method for manufacturing a novel display panel that is highly convenient or reliable. The display panel includes a pixel, a third conductive film electrically connected to the pixel, an insulating film including an opening portion overlapping with the third conductive film, and an electrode including a first region in contact with the third conductive film and a second region functioning as a contact point.