Abstract: An electronic apparatus includes a plurality of contacts electrically connectable to an accessory and arranged in a first direction orthogonal to a direction in which the accessory is attached. The contacts include an attachment detection contact to detect an attachment of the accessory to the electronic apparatus, and a communication request contact for a communication request from the accessory to the electronic apparatus. The attachment detection and communication request contacts are disposed between a contact closest one end and a contact closest to another end in the first direction. The attachment detection contact is disposed between the communication request contact and the contact closest to the one end. In the first direction, a distance between the attachment detection contact and the communication request contact is shorter than that between the communication request contact and the contact closest to the other end.

Abstract: A thermal head according to the present disclosure includes: a substrate; a first electrode; a heat generating section; a second electrode; a resin layer; and a protective layer. The first electrode is located on the substrate. The heat generating section is located on the substrate. The second electrode is located on the substrate so as to be electrically connected to the heat generating section and the first electrode. The resin layer is located on the first electrode. The protective layer is located on the resin layer. Moreover, the resin layer includes a first portion inserted in the first electrode.

Abstract: A thermal head of the present disclosure includes a substrate; a heat generating section disposed on the substrate; an electrode which is disposed on the substrate and is connected to the heat generating section; a protective layer covering the heat generating section and the electrode, the protective layer having a surface provided with a depression portion; at least one particle of metal disposed inside the depression portion; and an oxide layer covering the at least one particle, the oxide layer being formed of oxides of the metal. A surface of the oxide layer is exposed to an outside and is located in a deeper position of the depression portion than the surface of the protective layer around the depression portion.

Abstract: A thermal head of the present disclosure includes a substrate; a heat generating section disposed on the substrate; an electrode which is disposed on the substrate and is connected to the heat generating section; a protective layer covering the heat generating section and the electrode, the protective layer having a surface provided with a depression portion; at least one particle of metal disposed inside the depression portion; and an oxide layer covering the at least one particle, the oxide layer being formed of oxides of the metal. A surface of the oxide layer is exposed to an outside and is located in a deeper position of the depression portion than the surface of the protective layer around the depression portion.

Abstract: A thermal head according to the present disclosure includes: a substrate; a first electrode; a heat generating section; a second electrode; a resin layer; and a protective layer. The first electrode is located on the substrate. The heat generating section is located on the substrate. The second electrode is located on the substrate so as to be electrically connected to the heat generating section and the first electrode. The resin layer is located on the first electrode. The protective layer is located on the resin layer. Moreover, the resin layer includes a first portion inserted in the first electrode.

Abstract: There is provided an electrophotographic photoreceptor in which a temperature adjusting member can be installed and rotation axes of a base and a shaft or a bearing of a flange can be adjusted with high accuracy. An electrophotographic photoreceptor according to an embodiment of the invention includes a cylindrical base; a joint portion located at an end portion of the cylindrical base, including a shaft; and a photosensitive layer located on an outer circumferential surface of the cylindrical base, wherein the joint portion includes a penetration hole penetrating along an axial direction of the cylindrical base, the penetration hole configured to allow insertion and extraction of a temperature adjusting member located along an inner circumferential surface of the cylindrical base.

Abstract: There is provided an electrophotographic photoreceptor in which a temperature adjusting member can be installed and rotation axes of a base and a shaft or a bearing of a flange can be adjusted with high accuracy. An electrophotographic photoreceptor according to an embodiment of the invention includes a cylindrical base; a joint portion located at an end portion of the cylindrical base, including a shaft; and a photosensitive layer located on an outer circumferential surface of the cylindrical base, wherein the joint portion includes a penetration hole penetrating along an axial direction of the cylindrical base, the penetration hole configured to allow insertion and extraction of a temperature adjusting member located along an inner circumferential surface of the cylindrical base.

Abstract: Disclosed is an electrophotographic photoreceptor which comprises a base material and a photoconductive layer. The photoconductive layer is formed on the base material, and comprises a non-single-crystal material mainly composed of silicon. In the photoconductive layer, with regard to a characteristic energy E (eV) which has the relationship with a light absorption coefficient ?(cm?1) represented by the following formula (1), the characteristic energy E1 (eV) for an exposure wavelength in larger than the characteristic energy E2 (eV) for a neutralization wavelength. [Formula (1) a=C exp(h?/E) C: a constant h?: a photon energy h: a rationalized Planck's ?: the number of frequency.

Abstract: An electrophotographic photosensitive body includes a substrate and a photosensitive layer. In the electrophotographic photosensitive body, a reflectance to an exposure light L1 is defined as a first reflectance, and a reflectance of an eliminating light is defined as a second reflectance. The first reflectance is positively correlated with a light intensity rate of the exposure light L1, and the second reflectance is positively correlated with the light intensity rate of the exposure light L1 in a first case, while is negatively correlated with the light intensity rate of the exposure light L1 in a second case. In the first case, an amount of change of the first reflectance to an amount of change of the light intensity rate of the exposure light L1 is less than 1. In the second case, an amount of change of the first reflectance to an amount of change of the light intensity rate of the exposure light L1 is more than 1.

Abstract: A negative charging electrophotographic photosensitive body has a base, a photoconductive layer made of an amorphous silicon compound and formed amorphous silicon compound and formed on the base, a charge injection blocking layer formed on the photoconductive layer, and a surface layer formed on the charge injection blocking layer. The charge injection blocking layer contains at least one element selected from a group of N, O, and C and a group-13 element. The optical absorption coefficient of the charge injection blocking layer is smaller than that of the photoconductive layer, and the difference between the refractive index of the photoconductive layer and that of the charge injection blocking layer is greater than 0 and less than 0.9.

Abstract: Disclosed is an electrophotographic photoreceptor which comprises a base material and a photoconductive layer. The photoconductive layer is formed on the base material, and comprises a non-single-crystal material mainly composed of silicon. In the photoconductive layer, with regard to a characteristic energy E (eV) which has the relationship with a light absorption coefficient ? (cm?1) represented by the following formula (1), the characteristic energy E1 (eV) for an exposure wavelength in larger than the characteristic energy E2 (eV) for a neutralization wavelength.

Abstract: [Problems] To provide an electrophotographic photosensitive body that reduces non-uniform image density and that can enhance a definition of an image, and an image forming apparatus provided with the same. [Means for Solving Problems] An electrophotographic photosensitive body includes a substrate (20) and a photosensitive layer (21). In the electrophotographic photosensitive body, when a reflectance to an exposure light L1 is defined as a first reflectance, and a reflectance of an eliminating light is defined as a second reflectance, the first reflectance is positively correlated with a light intensity rate of the exposure light L1, and the second reflectance is positively correlated with the light intensity rate of the exposure light L1 in a first case, while is negatively correlated with the light intensity rate of the exposure light L1 in a second case.

Abstract: The present invention relates to an electrophotographic photosensitive member including a substantially cylindrical body rotated by rotation power transmitted via an first end portion from in an image forming apparatus and a photosensitive layer including a latent image forming area formed on an outer circumference of the body. The present invention also relates to an image forming apparatus provided with the electrophotographic photosensitive member. In the photosensitive layer, when the body is charged with a constant charging ability in the axial direction, dark electric potential at the latent image forming area gradually becomes larger as proceeding in the axial direction of the body, from the first end portion to a second end portion opposite to the first end portion.

Abstract: According to an embodiment of the invention, a photoreceptor comprises a conductive substrate; a first semiconductor layer over the conductive substrate; a second semiconductor layer over the first semiconductor layer; and a third semiconductor layer over the second semiconductor layer. Each of the first and the third semiconductor layers comprises a p-type semiconductor. The second semiconductor layer has a hole density smaller than the first and the third semiconductor layers.

Abstract: The present invention relates to an electrophotographic photosensitive member and an image forming apparatus provided with the same. The electrophotographic photosensitive member includes a substantially cylindrical body and a photosensitive layer having a latent image forming area formed on the body. The photosensitive layer includes a first end in the axial direction of the latent image forming area and a second end located opposite to the first end in the axial direction. The first end is pressed harder than the second end. In the photosensitive layer, thickness or dynamic indentation hardness at the first end at one side of the latent image forming area is larger than thickness or dynamic indentation hardness at the second end located opposite to the first end in the axial direction of the latent image forming area.

Abstract: The present invention relates to an electrophotographic photosensitive member including a substantially cylindrical body rotated by rotation power transmitted via an first end portion from in an image forming apparatus and a photosensitive layer including a latent image forming area formed on an outer circumference of the body. The present invention also relates to an image forming apparatus provided with the electrophotographic photosensitive member. In the photosensitive layer, when the body is charged with a constant charging ability in the axial direction, dark electric potential at the latent image forming area gradually becomes larger as proceeding in the axial direction of the body, from the first end portion to a second end portion opposite to the first end portion.

Abstract: The present invention relates to an electrophotographic photosensitive member and an image forming apparatus provided with the same. The electrophotographic photosensitive member includes a substantially cylindrical body and a photosensitive layer having a latent image forming area formed on the body. In the photosensitive layer incorporated in the image forming apparatus, a first end in the axial direction of the latent image forming area is pressed harder than a second end at opposite side of located opposite to the first end in the axial direction. In the photosensitive layer, thickness or dynamic indentation hardness at the first end at one side of the latent image forming area is larger than thickness or dynamic indentation hardness at the second end at opposite side of located opposite to the first end in the axial direction of the latent image forming area.