摘要:
An apparatus for developing electrostatic latent images with a two-component developer consisting of carrier and toner, comprising (a) a developer container, (b) a magnetic roll provided in the container, comprising a permanent magnet and a non-magnetic sleeve, (c) a hopper mounted on the container for replenishing toner to the container, (d) a roller provided in the container near its wall on the opposite side to the magnetic roll for mixing the developer with the toner replenished from the hopper and stirring them, (e) a device having a detection surface for detecting the concentration of toner in the developer. The detection device is mounted on the wall of the container such that the detection surface is located near the mixing roller to ensure the developer to flow smoothly and stably between the mixing roller and the detection surface.
摘要:
A process for depositing magnetic toner material on electrostatic latent images formed on an image bearing surfaces includes the steps of conveying toner to the developing zone via a magnet roll having a shell and coaxial permanent magnet member rotating in the same directions. In the region of the developing zone, the toner is subjected to both an A.C. magnetic field and an applied A.C. electrical field so as to render the toner electroconductive. The A.C. electrical field has a peak voltage greater than the dark voltage of the latent image, but less than 3,200 volts, and a frequency greater than v/0.3 where v is the advancing speed of the image bearing surfaces in relation to the magnet roll.
摘要:
A magnet-brush development process in which the amount of developer powder supplied to a development zone is self-controllable by the rotation of a magnet roll. A permanent magnet member and the shell rotate at different speeds in the same direction in such a manner that developer powder, as a whole, is conveyed on the shell in the direction opposite to the rotation of the magnet roll from a doctor spacing of a developer vessel to an image-bearing material. By controlling the doctor spacing to be larger than the gap between the image-bearing material and the magnet roll, an accumulation of the developer powder occurs on the shell between the doctor spacing and the development zone and is kept to be substantially constant. At the accemulation, an understream of powder moves in the direction of roll-movement towards the powder supply.
摘要:
A method of electrophotography in which an electrostatic latent image is formed on the surface of a material layer and a non-magnetic cylinder is provided to confront the surface of said material layer. A permanent magnet roll made up of a plurality of symmetrically arranged magnetic poles extends axially in said cylinder. A magnetic brush is formed by attracting a semiconducting or insulating magnetic toner onto the cylinder with the aid of a magnetic attraction force of the permanent magnet roll. The cylinder and permanent magnet roll are moved relative to each other to permit the magnetic brush to slide along the surface of the material layer thereby to allow the magnetic toner to adhere at predetermined position on the surface of said material layer, and a toner image is transferred onto a transferring member and is then subjected to fixing. The cylinder and the permanent magnet roll are rotated in the same direction so that the magnetic toner is moved in the same direction as that of said material layer at a speed less than 100 mm/sec irrespective of the speed of movement of the surface of said material layer at a development section.
摘要:
A device for removing residual toner from the surface of a photoreceptor after the transfer of a toner image from the photoreceptor surface to another surface comprises a fur brush for lightly sweeping residual toner particles on the surface of the photoreceptor to align the particles substantially in streaks along the sweeping direction and a magnetic roll for picking up the aligned toner particles by the magnetic attraction force of the magnetic roll. The fur brush is positioned adjacent to, and in a slight contact with, the surface of the photoreceptor. The magnetic roll is disposed adjacent to the surface of the photoreceptor and at the trailing side of the fur brush along the path of relative movement with the photoreceptor.
摘要:
A shift register is provided. In each of successively cascaded shift register units, for a first switch, control and output terminals are coupled to a first node and an output node respectively, and an input terminal receives a first clock signal. For a second switch, input and output terminals are coupled to the control terminal of the second switch and the first node respectively. For a third switch, a control terminal is coupled to the first node, and an input terminal receives the first clock signal. A first capacitor is coupled between an output terminal of the third switch and the first node. For a fourth switch, an input terminal is coupled to the first node, and an output terminal is coupled to a low voltage terminal. For a current shift register, a control terminal of the second switch receives an output signal generated by previous shift register unit.
摘要:
A display device where a memory circuit is installed into each pixel without generating flicker, including a plurality of pixels arranged in a matrix, wherein each pixel has a light-transmissive element controlling the amount of transmissive light in response to a voltage difference between a first electrode and a second electrode, a memory circuit storing the voltage level of the first electrode, and a controller. In the case where the first electrode has a positive voltage level with respect to the second electrode at a refreshing timing, the controller makes the memory circuit store the voltage level of the first electrode, applies a first predetermined voltage to the second electrode to increase the voltage level of the first electrode by the first predetermined voltage, and discharges the first electrode so that the first electrode has a negative voltage level with respect to the second electrode.
摘要:
A drive circuit is disclosed. The drive circuit includes a first p-typed thin film transistor (PTFT), a second PTFT, a first n-typed thin film transistor (NTFT), a second NTFT and a capacitor. The drain of the first PTFT is coupled to a first electrical line, and the gate thereof is coupled to a first clock line. The drain of the second PTFT is coupled to a second clock line, and the source thereof is coupled to an output. The source of the first NTFT is coupled to a second electrical line, and the gate thereof is couple to an output of a preceding drive circuit. The source of the second NTFT is couple to a third electrical line, the gate thereof is coupled to a third clock line, and the drain thereof is coupled to the output. The capacitor has one end coupled to the second electrical line, while the other end is coupled to the source of the first PTFT, the drain of the first NTFT and the gate of the second PTFT.
摘要:
A demultiplexer includes an input terminal for providing an input signal, a plurality of output terminals for outputting the input signal, and a switching circuit coupled among the input terminal and the plurality of output terminals, and outputting the input signal selectively from the plurality of output terminals according to a plurality of control signals provided to a plurality of control terminals. For miniaturizing the demultiplexer, the switching circuit includes one or more switch elements connected between the input terminal and each of the output terminals in series, wherein at least two of the switch elements coupled to different output terminals are simultaneously switched in response to one control signal from the plurality of control terminals.
摘要:
A display device whose pixels being embedded with a memory is disclosed. These pixels each includes: a capacitor; a switching unit between the display unit and the capacitor, being turning on during the sampling period; and a voltage detecting circuit for detecting the voltage between the capacitor and the switching unit. Besides, the display unit also includes: a first capacitor voltage source connected to a terminal of the capacitor which is not connected to the voltage detecting circuit, and applying a predetermined voltage within the variation range of the voltage state of the display unit on the capacitor in the sampling period; and/or a second capacitor voltage source, being connected to a terminal of the display unit which is not connected to the switching unit, and applying a predetermined voltage within the variation range of the voltage state of the display unit on the display unit in the sampling period.