JPS58207058A - Recording device - Google Patents

Abstract

PURPOSE:To easily maintain and manage the titled device with a simple constitution, by forming an electrostatic latent image on the surface of a dielectric drum by giving optical signals responding to picture signals to an optical switch array installed near the dielectric drum by means of an optical switch driving means. CONSTITUTION:A bias voltage VB is applied across the space between the transparent conductive film 21 of an optical switch array 2 installed near a dielectric drum 1 and a conductive basic body 10. An optical signal from an LED at a specified location of an LED array 4 is irradiated upon a corresponding location in the direction of length of a photoconductive layer 22 of the optical switch array 2 through an SELFOC lens 3. Then the resistance at the location, upon which the optical signal is irradited, is reduced and becomes equivalent to the resistance when the optical switch is driven, and a discharge is produced between the location and the dielectric drum 1. By the discharge, an electrostatic latent image is formed and the image is developed and transferred. Since the electrostatic latent image can be formed by utilizing the optical signal in this way, the constitution can be made simpler and the device can be maintained and managed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording device using an optical switch array. More specifically, the present invention relates to a recording device that is capable of recording images, etc. on plain paper by combining an optical switch array operated by optical signals, a dielectric, and a drum.

Conventionally, in devices that use light to record images on plain paper, a photosensitive drum is generally used, on which an electrostatic latent image is formed and a recorded image is obtained through a developing process and a fixing process. I have to. Conventional devices using such photosensitive drums require several band splitters,
Further, the photosensitive drum has various problems such as large mechanical wear and tear.

The present invention aims to realize a recording device that is simple in construction and easy to maintain and manage by using a dielectric drum that has excellent transfer and cleaning properties and is also mechanically strong.

The device according to the present invention includes an optical switch array configured by providing a photoconductive layer on a glass substrate with a transparent conductive film interposed therebetween, and disposing the optical switch array in close proximity to a dielectric drum.

An optical signal corresponding to an image signal is given to this optical switch array to drive the optical switch, and a discharge is generated between the switch and the Bt drum to form a latent image. .

FIG. 1 is a structural perspective view showing an example of a device according to the present invention;
FIG. 2 is a side view of the main parts, and FIG. 3 is a cross-sectional view of the overall structure of the device. In these figures, reference numeral 1 denotes a dielectric drum that rotates at a constant speed in the direction of the arrow, and is constructed by providing a dielectric layer 11 on the surface of a conductive substrate 10. Reference numeral 2 denotes an optical switch array, which is located close to the dielectric drum 1 in the width direction of the drum 1 (
(direction perpendicular to the direction of rotation). This optical switch array 2 is constructed by providing a photoconductive layer 22 on a glass substrate 20 with a transparent conductive film 21 interposed therebetween. 10, a bias voltage of 1 voltage VB is applied. 3 is a SELFOC lens array; 4 is an Ll array formed by arranging a plurality of light emitting elements (for example, LFtD) in the width direction of the drum 1; light from this IJD array passes through the SELFOC lens 3; The light is arranged so that the glass substrate 20 of the optical switch array 2 is irradiated with the light. Reference numeral 5 denotes a drive circuit for the LED array 4, which drives the LL4D located at a specific position among the plurality of LEDs in response to the image signal DI to cause it to emit light.

Via the lens 3, an image is irradiated onto a specific position in the longitudinal direction of the optical switch array 2 corresponding to the LED emitting light. In the optical switch array 2, the photovoltaic layer 2
When a light image is formed and irradiated onto the dielectric drum 2, the resistance of only that part decreases, which is equivalent to driving an optical switch, and a discharge occurs between that part and the dielectric drum 1. Therefore, on the surface of the dielectric layer 11 of the dielectric drum 1, there are positions where the light image is formed and irradiated, that is, positions corresponding to the nine positions of specific LEDs that emit light in accordance with the image signal Di in the LED array 4. is charged with electric charge, and an electrostatic latent image is formed.

In FIG. 3, the electrostatic latent image formed on the dielectric drum 1 as described above is developed by the developing device 6, and the electrostatic latent image is developed on the paper 70.
The image is then transferred by the transfer device 7. The paper 70 is fed in the direction indicated by the arrow, and after being removed by a static eliminator 81 to make it easier to separate the paper from the dielectric drum, the paper 70 is transferred to the fixing device 7.
It is fixed at 1. Dielectric drum 1 after the transfer process is completed
is removed by a static eliminator 82, and also by a cleaning device 9.
The remaining toner will be removed. After that, the static eliminator 83
Static electricity is removed again at , and the surface potential on the dielectric drum is returned to its initial state. In addition to the static eliminator, these devices may be other devices such as a static eliminator brush. Next, the above-mentioned discharge process is started, and an electrostatic latent image is formed again.

FIG. 4 is a structural perspective view showing another example of the device according to the present invention. In this embodiment, a laser beam from a laser light source 41 is horizontally scanned over the optical switch array 2 by an optical scanning device 42 such as a polygon mirror.

The laser light source 41 is modulated on and off according to the image signal DI by a drive signal from the drive circuit 5, and an electrostatic a image corresponding to -scanning is formed by one scan of the laser beam light. Ru. Note that 43 is a photodetector installed near one end of the optical switch array 2, and the signals from this are used to control the timing of rotation of the dielectric drum 1 and the timing of optical scanning. There is.

In the above embodiment, the optical switch array 2 is driven by the optical signal from the Ll array and the light from the laser light source, which is applied via the optical scanning means, but the light source may be a halogen lamp or the like. A fluorescent lamp may be used, and sheet-like light from the lamp may be used to drive an optical switch array through an optical shutter array such as PLZT.

As explained above, according to the apparatus according to the present invention, an electrostatic latent image can be formed on a dielectric drum using an optical signal, and the apparatus is simple in configuration and easy to maintain and manage. The device can be realized.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the device according to the present invention;
FIG. 2 is a side view of the main parts, FIG. 3 is a sectional view of the overall structure of the device, and FIG. 4 is a perspective view of the structure of another example of the present invention. 1...Installation, drum, 2...Light switch array, 5
...Selfoc lens array, 4...Ll array, 5...drive circuit.

Claims (4)

[Claims] (1) Transparent conductive PIA on dielectric drum and glass substrate
an optical switch array configured by providing a photoconductive layer through the dielectric drum and installed close to the surface of the dielectric drum; an optical switch driving means for supplying an optical signal corresponding to an image signal to the optical switch array; Electric discharge is caused between the drum and the optical switch array to form an electrostatic latent image corresponding to the image signal on the surface of the dielectric drum, and this electrostatic latent image is subjected to a development process and a transfer process to form a recorded image. A recording device designed to record on paper. (2) The recording apparatus according to claim 1, which uses an LED array as the optical switch driving means. (3) The recording apparatus according to claim 1, which uses an optical gate array capable of irradiating a sheet of light as an optical switch driving means. (4) A record according to claim 1, in which the optical switch driving means is composed of a light source and an optical scanning device in which the optical color light beam scans the optical switch array. Device.