JPS61251883A - Display device - Google Patents

Abstract

PURPOSE:To convert easily only the desired display contents to hard copy by converting temporarily display information to an electrostatic image, and serving this electrostatic image for a display, in a visual state. CONSTITUTION:From an input part 10, for instance, a keyboard, a signal for requesting a hard copy of an image is supplied to a transfer driving circuit 11. The driving circuit 11 presses a transfer roller 12 against a belt 2, and an image which is formed by a toner on the belt 2 is transferred to a form 13 through the transfer roller 12. This form 13 is developed permanently by a developing device 14 of heating welding or pressure fixation, etc., and thereafter, cutting can be executed by a cutter 15. In such a way, although the same high speed as that of a CRT display cannot be obtained, in case executing process of information while a man converses with a computer the result of the processing can be displayed at a sufficiently practical speed.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a display device #.

[Technical background of the invention and its problems]

2. Description of the Related Art Conventionally, in man-machine systems in which a human performs information processing while communicating with a computer, a CRT display or printer has been used to display the processing results. Although a CRT display can display processing results at a sufficiently high speed, when used in a conversational format, it requires a relatively long time for humans to think and respond (for example, the time required for key operations). Therefore, such a high-speed display device is not necessarily necessary, and is also expensive and uneconomical. On the other hand, printers can record processing results on paper and use it as a hard copy, but if the processing results are completely changed, a large amount of paper will become unnecessary, which is extremely undesirable from the viewpoint of resource conservation and running costs. .

[Purpose of the invention]

The present invention has been made based on the above viewpoint, and its object is to provide a novel electrostatic display device.

Another object of the present invention is to provide a low-cost electrostatic display device that can easily make hard copies of only desired display contents.

[Rt requirements for invention]

The present invention is characterized in that display information is once converted into an electrostatic image, and this static image is displayed in a visualized state.

〔Effect of the invention〕

According to the present invention, compared to a display using a CRT or the like, a display screen with a higher definition can be obtained with a simpler structure, and there is no flicker, making it preferable as a display device for office automation. Furthermore, there is no need to make unnecessary hard copies, so long-term use has great benefits.

[Embodiments of the invention]

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention. roller 1
supports belt 2. When the roller 1 is driven by a roller drive circuit (not shown), the belt 2 is conveyed in the direction of arrow A. The belt 2 is constructed of plastic or other material on which an electrostatic image can be formed. Furthermore, an electrostatic recording head (3%) toner developing device 4, a toner peeling device 5, and an electrostatic image erasing device 6 are provided opposite to the electrostatic recording head 2. When display information is supplied to the electrostatic recording head 3, an electrostatic charge image corresponding to the display information is recorded on the belt 2 in synchronization with the timing of the roller drive circuit. The electrostatic charge image on the belt 2 is guided to a toner developing device 4 and developed. By depositing toner 42 by developer roller 41%.

The electrostatic charge image on the belt 2 becomes a visible image. therefore.

This image can be easily recognized by observing the belt 2 from the direction of arrow B through the window 9 of the housing 8. If the display information is continuously supplied, the corresponding images can also be continuously observed. The belt 2 is further guided to a toner stripping device 5.

The toner adhering to the belt 2 is wiped off by a rotating cleaning brush 51, and at this time, the toner adhering to the brush is removed by a toner removing rod 52. If the toner peeled off from the belt 2 in this manner is sent to the toner developing device 4 by the toner guide 7, it can be used again as a developing toner.

Next, the belt 2 from which the toner has been removed by the cleaning brush 51 is guided to the electrostatic image erasing device 6. The electrostatic charge image erasing device is composed of a charging device such as a corona charger, and erases the electrostatic charge image charged on the belt 2 in preparation for the formation of a new electrostatic charge image by the electrostatic recording head 3.

As described above, according to the present invention, a display image is formed on an endless belt. Further, by setting the conveyance speed of the belt to an appropriate value, display images can be continuously obtained. In order to increase the contrast, the belt may be made of transparent plastic, for example, and a light reflecting plate may be provided behind it. Further, according to the apparatus of the present invention, it is possible to easily obtain a hard copy of a displayed image. As shown in FIG. 1, an input unit 10, for example, a keyboard, supplies a signal requesting a hard copy of an image to a transfer drive circuit 11. The drive circuit 11 presses the transfer roller 12 against the belt 2. Therefore, the image formed by the toner on the belt 2 is transferred to the paper 13 via the transfer roller 12. After this paper 13 is permanently developed by a developing device 14 such as heat fusing or pressure fixing, it can be cut out by a cutter 15.

As described in detail above, according to the present invention.

Although it is not as fast as a CRT display,
To obtain a low-cost display device that can display processing results at a speed that is sufficiently practical when a person processes information while talking with a computer, and does not require expensive electronic circuits.

Furthermore, it is possible to easily make a hard copy of a display image, which has not been possible with conventional display devices. Since this hard copy allows the operator to select and obtain only what is needed, paper is not wasted unlike conventional printers. Furthermore, since the toner used for development can be reused, there is no need to replenish toner, making it economical.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention. l... Roller 2... Belt 3... Sil'#1
Recording head 4... Toner developing device 5... Toner peeling device 6... Electrostatic charge image erasing device 8... Housing agent Patent attorney Nori Chika Nori Yumoe Takehana Kikuo 10 Procedural amendment letter (Method) % formula % 1. Indication of the case Japanese Patent Application No. 1982-202914 2. Device for displaying the name of the invention 3. Person making the amendment Relationship with the case Patent applicant (307) Toshiba Corporation 4. Agent address 〒105 1-1 Shibaura-chome, Minato-ku, Tokyo

Claims (2)

[Claims] (1) In a display device for displaying information handled by an information processing device, a belt-shaped record carrier having an electrostatic recording layer on the surface, at least a part of this record carrier being formed into a planar shape,
a conveyance means for conveying this record carrier in a fixed direction; an electrostatic image forming means for forming an electrostatic image on the electrostatic recording layer of the record carrier conveyed by this conveyance means; and this electrostatic image forming means. a developing means for converting an electrostatic image into a visible image; a removing means for removing the visible image formed by the developing means; and a developing means located between the removing means and the developing means; A display device comprising: an observation section provided to observe the visible image at a position where a record carrier carrying the visible image formed by the means is formed in a planar shape. (2) A display device according to claim 1, characterized in that means for transferring a visible image onto recording paper is provided between the observation section and the removal means, and this means is selectively used.