Abstract: Provided is an electrophotographic photoreceptor 1 including the outer periphery of a cylindrical substrate 20, at least a photosensitive layer 21. One or more processed lines 20a are provided on one or both of end portions in the axial direction outside an image forming region of the outer peripheral surface of the substrate 20 along the circumferential direction. Also provided is an image forming apparatus including the electrophotographic photoreceptor.

Abstract: To reduce the influence of a coupling pin that fixes a shaft to a photoreceptor drum on rotation of a photoreceptor drum. To provide photoreceptor device including: a photoreceptor drum having an insertion hole formed along a lengthwise direction; and a flange that is provided at a lengthwise end portion of the photoreceptor drum and has a through hole formed thereon at a position to overlap the insertion hole, wherein the flange has a first protruding portion and a second protruding portion that: are provided on an end surface at which the through hole is provided and around the through hole; and protrude from the end surface, the first protruding portion has a first opening at a position facing the through hole, and the second protruding portion is provided at a position opposite to the first opening across a center of the through hole on the end surface.

Abstract: To reduce the influence of a coupling pin that fixes a shaft to a photoreceptor drum on rotation of a photoreceptor drum. To provide photoreceptor device including: a photoreceptor drum having an insertion hole formed along a lengthwise direction; and a flange that is provided at a lengthwise end portion of the photoreceptor drum and has a through hole formed thereon at a position to overlap the insertion hole, wherein the flange has a first protruding portion and a second protruding portion that: are provided on an end surface at which the through hole is provided and around the through hole; and protrude from the end surface, the first protruding portion has a first opening at a position facing the through hole, and the second protruding portion is provided at a position opposite to the first opening across a center of the through hole on the end surface.

Abstract: Provided is an electrophotographic photoreceptor 1 including the outer periphery of a cylindrical substrate 20, at least a photosensitive layer 21. One or more processed lines 20a are provided on one or both of end portions in the axial direction outside an image forming region of the outer peripheral surface of the substrate 20 along the circumferential direction. Also provided is an image forming apparatus including the electrophotographic photoreceptor.

Abstract: An image decoding apparatus (100) capable of appropriately executing parallel decoding processing by a simple structure includes: a stream segmentation control unit (140) that designates a processing target area, and selects a portion of a segment stream based on a position of the processing target area; M stream segmentation units (130) that generate M×N segment streams by executing stream segmentation processing on designated M processing target areas in parallel; and N decoding engines (120) that decode respective portions of the N segment streams including the selected portion in parallel. In the case where a slice included in the processing target area is segmented into a plurality of slice portions and assigned to a plurality of segment streams, each stream segmentation unit (130) reconstructs, for each segment stream, a slice portion group made up of one or more slice portions assigned to the segment stream, as a new slice.

Abstract: An image decoding device for increasing decoding efficiency and reducing the number of memory accesses includes a division unit dividing a picture into first and second coded image data; and first and second decoding units decoding, in parallel, the first and second coded image data and storing decoding results into a frame storage unit. The first and second decoding units decode the first and second coded image data using second and first decoding result information, respectively, and store the resulting first and second decoding result information into an information storage unit. When decoding a target macroblock, each of the first and second decoding units performs image processing on the corresponding second or first decoding result information indicating part of the decoded macroblock included in the macroblock line adjacent to the macroblock line including the target macroblock, and the target macroblock.

Abstract: An electrophotographic photoreceptor is used by being detachably mounted onto an apparatus main body of an electrophotographic application apparatus while being incorporated in a process cartridge. The electrophotographic photoreceptor has a photosensitive drum formed by forming a photosensitive layer containing a photoconductive material on an outer circumferential surface of a cylindrical conductive substrate; and a flange that is fitted to an open end of the photosensitive drum and transmits a rotational driving force from the apparatus main body to the photosensitive drum. In the flange, on a surface thereof receiving the rotational driving force, a driven-side power transmission portion that is configured by a cylindrical body disposed concentrically with respect to a central shaft of the photosensitive drum, and engaging projections are provided.

Abstract: An electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate that includes an organic photoconductive material and charge transport materials including a styryl compound represented by structural formula (I) below and a triphenylamine compound represented by structural formula (II) below: wherein the charge transport materials have a mixing ratio of from 8.33 to 16.67 mass % of the styryl compound to from 91.67 to 83.33 mass % of the triphenylamine compound.

Abstract: An electrophotographic photoreceptor is removably installed and used in a device main unit of an electrophotography application device so as to form a process cartridge. The device main unit includes a driving-side power transmission portion. The photoreceptor includes a photosensitive drum including a cylindrical conductive base having a photosensitive layer containing a photoconductive material. A flange is fitted to the photosensitive drum. The flange includes a driven-side driving force transmission portion that has a cylindrical member and engaging protrusions. The flange transmits to the photosensitive drum a rotational driving force from the driving-side power transmission portion. A center of the cylindrical member is disposed on a central axis of the photosensitive drum. The protrusions are parallel to the central axis at positions on the outer periphery of the cylindrical member that trisect the cylindrical member.

Abstract: An image decoding device which increases decoding efficiency and can be easily implemented includes: a division unit dividing coded image data into first and second coded image data; a frame storage unit; first and second decoding units decoding, in parallel, the first and second coded image data; and an information storage unit. The first decoding unit decodes the first coded image data using second decoding result information stored in the information storage unit and stores, as first decoding result information, a part of information generated by the decoding into the information storage unit. The second decoding unit decodes the second coded image data using the first decoding result information stored in the information storage unit and stores, as the second decoding result information, a part of information generated by the decoding into the information storage unit.

Abstract: An electrophotographic photoreceptor is removably installed and used in a device main unit of an electrophotography application device so as to form a process cartridge. The device main unit includes a driving-side power transmission portion. The photoreceptor includes a photosensitive drum including a cylindrical conductive base having a photosensitive layer containing a photoconductive material. A flange is fitted to the photosensitive drum. The flange includes a driven-side driving force transmission portion that has a cylindrical member and engaging protrusions. The flange transmits to the photosensitive drum a rotational driving force from the driving-side power transmission portion. A center of the cylindrical member is disposed on a central axis of the photosensitive drum. The protrusions are parallel to the central axis at positions on the outer periphery of the cylindrical member that trisect the cylindrical member.

Abstract: An electrophotographic photoreceptor is used by being detachably mounted onto an apparatus main body of an electrophotographic application apparatus while being incorporated in a process cartridge. The electrophotographic photoreceptor has a photosensitive drum formed by forming a photosensitive layer containing a photoconductive material on an outer circumferential surface of a cylindrical conductive substrate; and a flange that is fitted to an open end of the photosensitive drum and transmits a rotational driving force from the apparatus main body to the photosensitive drum. In the flange, on a surface thereof receiving the rotational driving force, a driven-side power transmission portion that is configured by a cylindrical body disposed concentrically with respect to a central shaft of the photosensitive drum, and engaging projections are provided.

Abstract: An electrophotographic photoreceptor includes: a conductive substrate; and a photosensitive layer provided on the conductive substrate and containing an organic photoconductive material and charge transport materials including a styryl compound represented by structural formula (I) below and a triphenylamine compound represented by structural formula (II) below This photoreceptor resolves the problem of light induced fatigue that occurs when using a triphenylamine compound as a charge transport material to thereby provide a good electrophotographic photoreceptor with little light-induced fatigue while controlling costs.