Abstract: A backlight device (12) includes a light guide plate (14), and LEDs (17), and wiring portions (18c). The light guide plate (14) has a substantially circular outer shape and has fan-shaped areas (SA) defined by segment lines (SL) extending through a center (C) thereof. All the segment lines (SL) meet at the center (C). The LEDs (17) are arranged such that middle positions between LEDs (17) each located at an end in the circumferential direction in the respective sets of the LEDs (17) provided for the fan-shaped areas (SA) adjacent to each other in the circumferential direction coincides with the segment lines (SL). The wiring portions (18c) are equal or larger in number than the LEDs (17) included in each of the sets of LEDs (17) provided for the fan-shaped areas (SA) and are configured to supply electric power to the respective LEDs (17).

Abstract: A lighting device includes an annular light source including light sources arranged in a circular pattern, a light guide plate having a round shape in a plan view, and a case holding the annular light source and the light guide plate. The light guide plate is disposed inside the annular light source. The light guide plate includes light entering portions, circumferentially aligned portions, and a light emitting portion. The light entering portions are opposed to the light sources. Each circumferentially aligned portion is between the adjacent light entering portions. A dimension of the circumferentially aligned portion in the radial direction is larger than a dimension of the light entering portion in the radial direction. The circumferentially aligned portions are aligned with the light sources in the circumferential direction and configured to contact the light sources when the light guide plate is rotated in the circumferential direction.

Abstract: A backlight unit includes a light emission reflecting portion, first reflecting protrusions, and second reflecting protrusions. The light emission reflecting portion includes unit reflecting portions that include main reflecting surfaces and light reentering surfaces arranged opposite to the main reflecting surfaces, respectively. The first reflecting protrusions include extended main reflecting surfaces that continue to the main reflecting surfaces, respectively, and first auxiliary reflecting surfaces that reflect rays of light traveling toward an opposite plate surface and direct the rays of light toward the main reflecting surfaces and the extended main reflecting surfaces.

Abstract: A post-processing apparatus includes: a moving mechanism configured to move a punching apparatus in a width direction orthogonal to a transportation direction of a sheet; and a sensor configured to optically detect a mark formed on the sheet and indicating a position to be punched. The mark is configured such that an interval in the transportation direction between a plurality of feature portions extending in the width direction is configured to be changed depending on the width direction. The moving mechanism is configured to determine a position of the punching apparatus in the width direction based on a difference between respective timings of detection of the plurality of feature portions.

Abstract: Provided is an electrophotographic photoreceptor obtained by laminating a photosensitive layer and a surface protective layer in this order on a conductive support, wherein the surface protective layer contains conductive fine particles and crosslinkable organic fine particles, and either the conductive fine particles or the crosslinkable organic fine particles have been subjected to surface modification with a fluoroalkyl (meth)acrylate/(meth)acrylic acid copolymer.

Abstract: A lighting device includes an annular light source including light sources arranged in a circular pattern, a light guide plate having a round shape in a plan view, and a case holding the annular light source and the light guide plate. The light guide plate is disposed inside the annular light source. The light guide plate includes light entering portions, circumferentially aligned portions, and a light emitting portion. The light entering portions are opposed to the light sources. Each circumferentially aligned portion is between the adjacent light entering portions. A dimension of the circumferentially aligned portion in the radial direction is larger than a dimension of the light entering portion in the radial direction. The circumferentially aligned portions are aligned with the light sources in the circumferential direction and configured to contact the light sources when the light guide plate is rotated in the circumferential direction.

Abstract: Provided is a technique for controlling the hue of an image when the image is displayed on a display panel so that the image should not be displayed with a hue different from the actual hue. The display device includes a display panel that includes an active matrix substrate 11a and a counter substrate 11b, and a reflection unit 12. The active matrix substrate 11a includes gate lines and source lines 24, and includes a plurality of pixel areas that are defined by the gate lines and the source lines 24. The counter substrate 11b includes color filters 31R, 31G, 31B of R, G, B at positions corresponding to the pixel areas. The reflection unit 12 transmits light from the light source 14, and reflects light from the active matrix substrate 11a. The pixel areas of R, G, B have reflection areas that reflect light from the reflection unit 12 so that the respective amounts of light outgoing from the above-described pixel areas are approximately uniform.

Abstract: An image reading apparatus includes: a movable body configured to illuminate a document with light; and an apparatus body configured to wirelessly transmit power to the movable body, wherein the movable body includes receiver coils, and a feed circuit in which the receiver coils uses receiving power to supply power to a load, the apparatus body includes transmitter coils placed along a track of the receiver coils, the transmitter coils and the receiver coils are placed such that power supply efficiency of any receiver coil with the transmitter coil placed along the track of the receiver coil fluctuates, and power supply efficiency related to one receiver coil increases at a position where power supply efficiency related to the other receiver coil drops, and the feed circuit supplies power sequentially using the receiving power of the receiver coil whose power supply efficiency is increased to highest among the receiver coils.

Abstract: A backlight device includes: optical members with a substantially circular profile, including a light guide plate, optical sheets, and a reflective sheet; a chassis (lamination member) disposed to overlap the light guide plate, the optical sheets, and the reflective sheet (optical members); and positioning structures. The positioning structures are provided on the light guide plate, the optical sheets, and the reflective sheet (optical members) and on the chassis (lamination member). The positioning structures have contact faces that come into contact with each other in the circumferential direction of the light guide plate, the optical sheets, and the reflective sheet (optical members), so as to position the light guide plate, the optical sheets, and the reflective sheet (optical member) relative to the chassis (lamination member) in the circumferential direction.

Abstract: An image forming apparatus includes an acquiring unit configured to acquire atmosphere pressure in the installation place of the image forming apparatus, photoconductors, light sources configured to radiate laser light, and a polygon mirror configured to be rotatable. The polygon mirror exposes the photoconductors by reflecting the laser light toward the photoconductors while rotating. The image forming apparatus further includes a control device configured to control rotation of the polygon mirror. The control device outputs an enable signal for allowing the image forming apparatus to perform printing, if rotation of the polygon mirror is stabilized after start of the rotation, and advances the timing of outputting the enable signal as the atmosphere pressure increases.

Abstract: An image forming apparatus includes a photoreceptor, a charging unit, an exposing unit, a developing unit, a transfer unit, a lubricant supply unit, a cleaning unit and a lubricant removal unit. The lubricant supply unit supplies a lubricant to a surface of the photoreceptor and is disposed at a point which is an upstream side of the cleaning unit and a downstream side of the developing unit in a rotation direction of the photoreceptor. The lubricant removal unit removes the lubricant from the surface of the photoreceptor and is disposed at a point which is the downstream side of the cleaning unit and the upstream side of the developing unit in the rotation direction of the photoreceptor.

Abstract: A backlight unit includes LEDs, a light guide plate, a prism sheet, exiting light reflecting portions, prisms, concave lenticular lenses, and flat portions. The concave lenticular lenses are configured such that an occupancy rate of concave cylindrical lenses with respect to the second direction is higher in an area closer to a light entering surface with respect to the first direction and the occupancy rate is lower in an area farther from the light entering surface. The flat portions are formed adjacent to the concave cylindrical lenses with respect to the second direction such that an occupancy rate of flat portions with respect to the second direction is lower in an area closer to a light entering surface with respect to the first direction and the occupancy rate of the flat portions with respect to the second direction is higher in an area farther from the light entering surface.

Abstract: The invention provides a surveying instrument comprising a frame unit rotatable in a horizontal direction, a telescope unit as mounted rotatably in a vertical direction on the frame unit, a driving unit for rotating and driving the frame unit and the telescope unit, a horizontal angle measuring unit for detecting a horizontal angle of the frame unit, a vertical angle measuring unit for detecting a vertical angle of the telescope unit and a control device, wherein the telescope unit has a telescope for sighting an object to be measured and a wide angle camera having a wider field angle than the telescope and for acquiring an image in a sighting direction, wherein the wide angle camera is set so that a sighting position of the sun is on a photodetection element and the sighting position of the sun is at a known position deviated from a field of view of the telescope, wherein the control device detects an image of the sun and a center of the image of the sun from an image acquired by the wide angle camera and co

Abstract: A backlight unite 12 includes LEDs 17, an optical member 16, a positioning portion 23, and a rotation restricting portion 24. The optical member 16 includes at least a curved end surface 16C having a curved shape in a plan view included in a periphery of the optical member 16. The positioning portion 26 includes a positioning hole 25 that opens through a thickness direction of the optical member 16 and a positioning protrusion 26 that is inserted in the positioning hole 25 and is in contact with an inner wall of the positioning hole 25. The rotation restricting portion 24 includes an optical member recess 27 that is a portion of the periphery of the optical member 16 recessed along a circumferential direction and a contact portion 28 that is in contact with the optical member recess 27.

Abstract: A backlight unit includes a lightguide, a light source that emits light to the lightguide, and a barrier layer positioned over the lightguide in a light emitting direction relative to the lightguide. The barrier layer defines a bezel area of the backlight unit, and an active area of the backlight unit from which light is emitted from the lightguide is an area adjacent to a boundary of the bezel area. A prism structure is positioned in the bezel area, wherein stray light emitted from the light source uncoupled to the lightguide is at least partially coupled into the lightguide by the prism structure or directed to a greater degree along the lightguide. The prism structure may be configured as a plurality of lenticular triangular prisms, and may be mounted to a mounting frame, back reflector, or flat panel connector of the backlight unit.

Abstract: A backlight unit includes LEDs, a light guide plate, a prism sheet, exiting light reflecting portions, prisms, concave lenticular lens lenses, and flat portions. The concave lenticular lenses are configured such that an occupancy rate of concave cylindrical lenses with respect to the second direction is higher in an area closer to a light entering surface with respect to the first direction and the occupancy rate is lower in an area farther from the light entering surface. The flat portions are formed adjacent to the concave cylindrical lenses with respect to the second direction such that an occupancy rate of flat portions with respect to the second direction is lower in an area closer to a light entering surface with respect to the first direction and the occupancy rate of the flat portions with respect to the second direction is higher in an area farther from the light entering surface.

Abstract: An image forming apparatus includes an acquiring unit configured to acquire atmosphere pressure in the installation place of the image forming apparatus, photoconductors, light sources configured to radiate laser light, and a polygon mirror configured to be rotatable. The polygon mirror exposes the photoconductors by reflecting the laser light toward the photoconductors while rotating. The image forming apparatus further includes a control device configured to control rotation of the polygon mirror. The control device outputs an enable signal for allowing the image forming apparatus to perform printing, if rotation of the polygon mirror is stabilized after start of the rotation, and advances the timing of outputting the enable signal as the atmosphere pressure increases.

Abstract: A backlight device 12 includes a light guide plate 14, LEDs 17, and wiring portions 18c. The light guide plate 14 has a substantially circular outer shape and has fan-shaped areas SA defined by segment lines SL extending through a center C thereof. All the segment lines SL meet at the center C. The LEDs 17 include sets of LEDs 17 provided for the fan-shaped areas SA. The LEDs 17 are arranged such that middle positions between LEDs 17 each located at an end in the circumferential direction in the respective sets of the LEDs 17 provided for the fan-shaped areas SA adjacent to each other in the circumferential direction coincides with the segment lines SL. The wiring portions 18c are equal or larger in number than the LEDs 17 included in each of the sets of LEDs 17 provided for the fan-shaped areas SA and are configured to supply electric power to the respective LEDs 17 provided for the fan-shaped areas SA.

Abstract: A lighting device includes a light guide plate 14 having a light exit surface 14A.

Abstract: An image reading apparatus includes: a movable body configured to illuminate a document with light; and an apparatus body configured to wirelessly transmit power to the movable body, wherein the movable body includes receiver coils, and a feed circuit in which the receiver coils uses receiving power to supply power to a load, the apparatus body includes transmitter coils placed along a track of the receiver coils, the transmitter coils and the receiver coils are placed such that power supply efficiency of any receiver coil with the transmitter coil placed along the track of the receiver coil fluctuates, and power supply efficiency related to one receiver coil increases at a position where power supply efficiency related to the other receiver coil drops, and the feed circuit supplies power sequentially using the receiving power of the receiver coil whose power supply efficiency is increased to highest among the receiver coils.