Abstract: A developing device, comprising: a developer bearing member which bears a two-component developer including a toner and carrier; a magnet member disposed inside the developer bearing member, the magnet member making the developer bearing member bear the two-component developer on the developer bearing member by magnetic force; and a developer regulating member which regulates a layer thickness of the developer borne on the developer bearing member, the developer regulating member being made of magnetic material, the developer regulating member being fixed at both end portions in a longitudinal direction, wherein grooves are formed on a surface of the developer bearing member, and a developer conveying force of the grooves at a central portion of the developer bearing member in the longitudinal direction is larger than a developer conveying force of the grooves at an end portion of the developer bearing member in the longitudinal direction.

Abstract: According to a representative configuration of the developing device and the image forming apparatus of the present invention, the developing device includes: a developing sleeve which bears developer and conveys the developer to a developing region; a developing chamber which supplies the developer to the developing sleeve; an agitating chamber which forms a circulation path with the developing chamber and collects the developer from the developing sleeve; and a conveying unit (a first conveying screw and a second conveying screw) which circulates and conveys the developer in the circulation path. A spiral groove is formed on a surface of the developing sleeve so as to apply a conveying force to the developer in a rotation axis direction of the developing sleeve opposite to a developer conveying direction of the agitating chamber.

Abstract: A display signal processing device includes a reference gradation voltage generating circuit that generates ten reference gradation voltages, and a D/A converting circuit that converts a video signal to a pixel voltage by selectively using the ten reference gradation voltages obtained from the reference gradation voltage generating circuit. The reference gradation voltage generating circuit includes four variable voltage generating sections that generate output voltages, which are varied for gamma correction, and nine resistors that are connected to divide difference voltages obtained between output terminals of the four variable voltage generating sections into the ten reference gradation voltages.

Abstract: A temperature sensor detects information regarding humidity in an atmosphere of a developing container. A temperature sensor detects information regarding humidity in an atmosphere of a toner hopper. An inductance sensor detects information regarding a toner density within the developing container. A printer controller controls a replenishing operation of a replenishing screw member based on image information. The printer controller controls the replenishing operation of the replenishing screw member so that a toner density within the developing container is less than or equal to a predetermined value based on a detection result of the inductance sensor. The printer controller controls the predetermined value to be small when a difference between humidity detection results detected by each of the temperature sensors is large as compared to when the difference is small.

Abstract: A temperature sensor detects information regarding humidity in an atmosphere of a developing container. A temperature sensor detects information regarding humidity in an atmosphere of a toner hopper. An inductance sensor detects information regarding a toner density within the developing container. A printer controller controls a replenishing operation of a replenishing screw member based on image information. The printer controller controls the replenishing operation of the replenishing screw member so that a toner density within the developing container is less than or equal to a predetermined value based on a detection result of the inductance sensor. The printer controller controls the predetermined value to be small when a difference between humidity detection results detected by each of the temperature sensors is large as compared to when the difference is small.

Abstract: A developing device includes a developing container in which a developer is contained; a developer carrying member for carrying the developer and feeding the developer by rotation thereof to a developing zone in which the developer carrying member opposes an image bearing member on which a latent image is formed and develops the latent image with the developer; and an electrode, disposed opposed to the developer carrying member, to which a bias for forming an electric field for moving regular-charge toner in the developer container toward the developer carrying member is to be applied. The electrode is provided downstream of the developing zone with respect to a rotational direction of the developer carrying member and is provided vertically above the developer carrying member. At least a part of the electrode is located downstream of a rectilinear line connecting a rotation center and top point of the developer carrying member with respect to the rotational direction of the developer carrying member.

Abstract: An aspect of the invention provides a development device including a rotatable development sleeve which supplies developer to a photosensitive drum, the development sleeve being disposed such that a rotational axis of the development sleeve is orientated toward a vertical direction; a conveying screw which conveys the developer along a rotational axis direction of the development sleeve; and a developer supply guide which guides the developer conveyed by the developer conveying device to the development sleeve. The plural developer supply guides are disposed at predetermined intervals in the rotational axis direction of the development sleeve and between the development sleeve and the conveying screw.

Abstract: A developing device includes a developing container in which a developer is contained; a developer carrying member for carrying the developer and feeding the developer by rotation thereof to a developing zone in which the developer carrying member opposes an image bearing member on which a latent image is formed and develops the latent image with the developer; and an electrode, disposed opposed to the developer carrying member, to which a bias for forming an electric field for moving regular-charge toner in the developer container toward the developer carrying member is to be applied. The electrode is provided downstream of the developing zone with respect to a rotational direction of the developer carrying member and is provided vertically above the developer carrying member. At least a part of the electrode is located downstream of a rectilinear line connecting a rotation center and top point of the developer carrying member with respect to the rotational direction of the developer carrying member.

Abstract: An image forming apparatus includes an exposure device for exposing an electrically charged surface of an image bearing member to light to form an electrostatic image; a developing device capable of collecting a transfer residual developer remaining on the image bearing member; a transferring device for transferring a developer image from the image bearing member onto a transfer medium at a transfer position; and a controller for executing, during non-image formation, a developer collecting mode in which a developer of an opposite polarity is collected into the developing device by driving the image bearing member and by causing the developer carrying member to stop its rotation or rotate at a speed slower than a rotational speed thereof during image formation while generating a potential difference capable of transferring the developer of the opposite polarity from the image bearing member onto the developer carrying member.

Abstract: A liquid crystal display apparatus includes a plurality of source lines and gate lines, pixel switching elements, and a plurality of drive circuits, each provided for a group of a predetermined number of source lines, and converting i-bit data video signal into an analog gradation signal and supplying the analog gradation signal to each of the source lines, the liquid crystal display apparatus performing gradation display with an ith power of 2, based on i-bit data, wherein the drive circuits each include a first switching circuit which selects the video signal, a digital to analog conversion circuit DAC which converts the video signal into the gradation signal, a second switching circuit which supplies the gradation signal to each source line, and a control circuit which controls an order of supplying the gradation signal to each source line to be different every n horizontal period and every m vertical period.

Abstract: An aspect of the invention provides a development device including a rotatable development sleeve which supplies developer to a photosensitive drum, the development sleeve being disposed such that a rotational axis of the development sleeve is orientated toward a vertical direction; a conveying screw which conveys the developer along a rotational axis direction of the development sleeve; and a developer supply guide which guides the developer conveyed by the developer conveying device to the development sleeve. The plural developer supply guides are disposed at predetermined intervals in the rotational axis direction of the development sleeve and between the development sleeve and the conveying screw.

Abstract: An image forming apparatus includes an exposure device for exposing an electrically charged surface of an image bearing member to light to form an electrostatic image; a developing device capable of collecting a transfer residual developer remaining on the image bearing member; a transferring device for transferring a developer image from the image bearing member onto a transfer medium at a transfer position; and a controller for executing, during non-image formation, a developer collecting mode in which a developer of an opposite polarity is collected into the developing device by driving the image bearing member and by causing the developer carrying member to stop its rotation or rotate at a speed slower than a rotational speed thereof during image formation while generating a potential difference capable of transferring the developer of the opposite polarity from the image bearing member onto the developer carrying member.

Abstract: Operational amplifiers are connected to an electrical power source through switching elements. A power controller unit turns off switching elements connected to operational amplifiers not used. Thus, it is possible to prevent an unnecessary electric power being consumed.

Abstract: In order to prevent the reproducibility of a display image from degrading due to the characteristic of a liquid crystal, a liquid crystal display device includes: a liquid crystal panel; a gray scale value generation unit which generates, based on a first gray scale value, a second gray scale value with a gray scale number smaller than the gray scale number of the first gray scale value; and a brightness control unit which sequentially controls the brightness of a corresponding liquid crystal pixel based on the second gray scale value generated by the gray scale value generation unit in a case where the first gray scale value is within a predetermined range, and which controls the brightness of the corresponding liquid crystal pixel based on the first gray scale value in a case where the first gray scale value is out of the predetermined range.

Abstract: A planar display device includes: a first display panel having a plurality of first scan lines and a plurality of first signal lines; a second display panel having a plurality of second scan lines and a plurality of second signal lines; and a second selective connection circuit in which the plurality of second signal lines are categorized into a plurality of second signal line groups respectively representing different colors, with the plurality of second signal lines associated with the first signal lines in a first signal line group which are connected to a plurality of image signal supplying lines. In a case where a second display is performed by use of the second display panel, the second selective connection circuit connects all of the second signal lines to the corresponding first signal lines in the first signal line group.

Abstract: A display signal processing device includes a reference gradation voltage generating circuit that generates ten reference gradation voltages, and a D/A converting circuit that converts a video signal to a pixel voltage by selectively using the ten reference gradation voltages obtained from the reference gradation voltage generating circuit. The reference gradation voltage generating circuit includes four variable voltage generating sections that generate output voltages, which are varied for gamma correction, and nine resistors that are connected to divide difference voltages obtained between output terminals of the four variable voltage generating sections into the ten reference gradation voltages.

Abstract: A liquid crystal display includes a scan line driver (12) to drive scan lines and a power source (14) to supply voltage to the scan line driver. The scan line driver and power source are formed directly on an array substrate of the liquid crystal display. The liquid crystal display also includes a signal-line-driving IC (15) mounted on the array substrate. The IC incorporates a power source (DC voltage converter (1508) and voltage stabilizer (1509)) to supply voltage to a signal line driver (analog output circuit (1504) and the like). The power source in the IC is integrated according to a low-withstanding-voltage manufacturing process. With these configurations, the liquid crystal display is compact and is manufacturable at a low cost.

Abstract: There is provided a display method of a flat display unit arranged so as to prevent an abnormality of a screen which is otherwise caused by coupling by inhibiting homo-polar video signals from being sampled within a sample and hold circuit having two circuits. Positive and negative polar video signals are sampled always alternately in A and B circuits of the respective sample and hold circuits of a signal line driving section by keeping the polarity of a video signal voltage before non-displaying timing same with that of the non-displaying timing, by stopping to switch the two systems of the sample and hold circuits and to output a signal when the non-displaying timing.

Abstract: A tape carrier package (TCP) and method of fabricating a tape carrier package (TCP) are provided to reduce a width dimension in a slim tape carrier package (TCP) used in a flat-panel display apparatus, such as a liquid crystal display (LCD) apparatus. While some margin in width is necessary for absorbing the spreading of potting resin that seals a driver integrated circuit (IC), the spreading is limited within a narrow area by providing a configuration that is formed of an insulating film on a flexible insulating board. An insulating-film-omission region for not arranging an insulating film is installed within a band of the insulating film for covering a group of wirings on the insulated film board and is arranged to surround the mounting region of the driver integrated circuit (IC). The insulating-film-omission region serves for storing the sealing resin, while an inner edge of the band of the insulating film serves as a levee for preventing the sealing resin from wetting and spreading.