Abstract: An image display device according to the present disclosure includes a first self-light-emitting display element that emits light for an image of red light, a second self-light-emitting display element that emits light for an image of blue light, a third self-light-emitting display element that emits light for an image of green light, and a prism having a dichroic mirror that synthesizes images of three colors, in which the first self-light-emitting display element, the second self-light-emitting display element, and the third self-light-emitting display element have a first cathode, a second cathode, and a third cathode, respectively, and when a film thickness of the first cathode is referred to as TR, a film thickness of the second cathode is referred to as TB, and a film thickness of the third cathode is referred to as TG, a relationship TR<TG is satisfied.

Abstract: A technique restrains degradation of a light emitting element. A biological information acquisition device acquires light receiving result by causing a light receiving unit to receive light emitted by a light emitting unit serving as a measurement-purpose light emitting unit, and acquires biological information by using the light receiving result. The light is emitted from the light emitting unit so as to acquire the light receiving result for one time, while a plurality of light emitting patterns are switched between a light emitting element which emits the light and a light emitting element which does not emit the light in a plurality of the light emitting elements.

Abstract: To provide a light-emitting element which emits light in a near-infrared range and has high efficiency and long life, and a light-emitting device, an authentication device, and an electronic apparatus, each of which includes this light-emitting element.

Abstract: A technique for realizing energy saving. According to a biological information acquisition device, light emitting power per unit area of one light emitting element emitting light when first biological information is acquired is weaker than light emitting power per unit area of one light emitting element emitting light when second biological information is acquired.

Abstract: To provide a light-emitting element which emits light in a near-infrared region and has high efficiency and long life, and a light-emitting device, an authentication device, and an electronic apparatus, each of which includes this light-emitting element. A light-emitting device 100 of the invention includes a light-emitting element 1A including an anode 3, a cathode 8, and a light-emitting layer 5 which is provided between the anode 3 and the cathode 8 and emits light in a near-infrared region by applying a current between the anode 3 and the cathode 8, wherein the device emits visible light with a luminance of 5 cd/m2 or more when a current is applied between the anode 3 and the cathode 8 at a current density of 300 A/cm2 or less.

Abstract: A light-emitting element according to the invention includes an anode, a cathode, a light-emitting layer which is provided between the anode and the cathode, contains a light-emitting material and a first tetracene-based compound having a tetracene skeleton functioning as a host material that holds the light-emitting material, and emits light in a wavelength region of 600 nm or more by applying a current between the anode and the cathode, and an electron transport layer which is provided between the light-emitting layer and the cathode, and includes a first electron transport layer located on the cathode side and a second electron transport layer located on the light-emitting layer side and containing a second tetracene-based compound having a tetracene skeleton.

Abstract: A light-emitting element according to the invention includes an anode, a cathode, and a light-emitting layer which is provided between the anode and the cathode, contains a light-emitting material and a host material that holds the light-emitting material, and emits light having a peak wavelength in a near-infrared region by applying a current between the anode and the cathode, wherein the content of the light-emitting material in the light-emitting layer is 30 wt % or more and 70 wt % or less. Further, it is preferred that the light-emitting layer emits light having the peak wavelength of 700 nm or more and 960 nm or less.

Abstract: A light-emitting element includes an anode, a cathode, a light-emitting layer which is provided between the anode and the cathode and emits light in a wavelength range of 700 nm or more by conducting electricity between the anode and the cathode, and an electron transport layer which is provided between the light-emitting layer and the cathode, and includes a first electron transport layer located on the cathode side and a second electron transport layer located on the light-emitting layer side, wherein organic materials contained in the light-emitting layer, a hole injection layer, the first electron transport layer, and the second electron transport layer have a glass transition temperature Tg of 135° C. or higher or do not have a glass transition temperature.

Abstract: Provided are a light emitting element with a high efficiency and a long life that emits light in a near-infrared region, and a light emitting device, authentication device and electronic device that include the light emitting element. A light emitting element (1) according to one aspect of the invention includes an anode (3), a cathode (8), and a light emitting layer (5) that is provided between the anode (3) and the cathode (8) and that emits light by conducting current between the anode (3) and the cathode (8). The light emitting layer (5) includes a pyrromethene-based boron complex as a light emitting material and a tetracene-based material as a host material for retaining the light emitting material.

Abstract: A biological information acquisition device selects a light emitting unit located above a blood vessel as a measurement light emitting unit, and selects a light receiving unit spaced apart from the measurement light emitting unit by a predetermined distance and located above the blood vessel as a measurement light receiving unit and causes the measurement light receiving unit to acquire a first light receiving result. The device selects a light emitting unit which is not located above the blood vessel as a reference light emitting unit, and selects a light receiving unit spaced apart from the reference light emitting unit by the predetermined distance and not located above the blood vessel as a reference light receiving unit and causes the reference light receiving unit to acquire a second light receiving result.

Abstract: To provide a light-emitting element which emits light in a near-infrared region and has high efficiency and long life, and a light-emitting device, an authentication device, and an electronic apparatus, each of which includes this light-emitting element. A light-emitting device 100 of the invention includes a light-emitting element 1A including an anode 3, a cathode 8, and a light-emitting layer 5 which is provided between the anode 3 and the cathode 8 and emits light in a near-infrared region by applying a current between the anode 3 and the cathode 8, wherein the device emits visible light with a luminance of 5 cd/m2 or more when a current is applied between the anode 3 and the cathode 8 at a current density of 300 A/cm2 or less.

Abstract: A light-emitting element includes an anode, a cathode, and a light emission layer. The light emission layer is arranged between the anode and the cathode and configured to emit light by energization between the anode and the cathode. The light emission layer includes a compound represented by a general formula NIR-D as a light emission material and a compound represented by a formula IRH-1 as a host material of the light emission material. The general formula NIR-D is in which each R independently indicates group comprising a phenyl group, a thiophenyl group, a furyl group, or at least one species of derivatives thereof. The formula IRH-1 is in which n indicates a natural number 1 to 12, and each R independently indicates a hydrogen atom, an alkyl group, an optionally substituted aryl group, or an arylamino group.

Abstract: To provide a light-emitting element which emits light in a near-infrared range and has high efficiency and long life, and a light-emitting device, an authentication device, and an electronic apparatus, each of which includes this light-emitting element.

Abstract: A light-emitting element includes an anode, a cathode, a light-emitting layer which is provided between the anode and the cathode and emits light in a wavelength range of 700 nm or more by conducting electricity between the anode and the cathode, and an electron transport layer which is provided between the light-emitting layer and the cathode, and includes a first electron transport layer located on the cathode side and a second electron transport layer located on the light-emitting layer side, wherein organic materials contained in the light-emitting layer, a hole injection layer, the first electron transport layer, and the second electron transport layer have a glass transition temperature Tg of 135° C. or higher or do not have a glass transition temperature.

Abstract: A light-emitting element includes an anode, a cathode, and a light emission layer. The light emission layer is arranged between the anode and the cathode and configured to emit light by energization between the anode and the cathode. The light emission layer includes a compound represented by a general formula NIR-D as a light emission material and a compound represented by a formula IRH-1 as a host material of the light emission material. The general formula NIR-D is in which each R independently indicates group comprising a phenyl group, a thiophenyl group, a furyl group, or at least one species of derivatives thereof. The formula IRH-1 is in which n indicates a natural number 1 to 12, and each R independently indicates a hydrogen atom, an alkyl group, an optionally substituted aryl group, or an arylamino group.

Abstract: Provided are a light emitting element with a high efficiency and a long life that emits light in a near-infrared region, and a light emitting device, authentication device and electronic device that include the light emitting element. A light emitting element (1) according to one aspect of the invention includes an anode (3), a cathode (8), and a light emitting layer (5) that is provided between the anode (3) and the cathode (8) and that emits light by conducting current between the anode (3) and the cathode (8). The light emitting layer (5) includes a pyrromethene-based boron complex as a light emitting material and a tetracene-based material as a host material for retaining the light emitting material.