JPS60198958A - Display device - Google Patents

Abstract

PURPOSE:To display a desired picture in a short time by moving a picture medium from a picture forming device to a display device and selecting a stored picture in a storage device to extract the displayed picture to the picture forming device in order to change the picture according to a command of a command device. CONSTITUTION:When a display start command is inputted from a keyboard, a motor is driven and a belt 109 being a photosensitive body is turned in the direction of arrow. Then laser beam scanning exposure of designated picture information is started at the inner face side of the belt 109 between rollers 107 and 108 and the exposure scanning for two pictures' share is performed. Toner of a developer 116 acts on the outer face of the belt at the same time with the exposure and a toner picture corresponding to the exposed image is formed sequentially. The picture is moved to a peeping window hole 102 attended with the turning of the belt, stops within the designated window hole range temporarily so as to be observed. Then the next display picture is moved to the window hole range by the next driving of the motor and the next pattern is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device K that forms and displays an image on an image carrier such as a photoreceptor belt or an insulating drum, and in particular,
A terminal device or reader device, or a copying machine, etc. that reproduces and displays image information converted into an electrical signal read and outputted from a carpet reading device, etc., or image information accumulated and stored on a magnetic tape, etc., as a visually recognizable image. The present invention relates to an image display device suitable as an image monitor device in office automation equipment and other image-related equipment.

2. Description of the Related Art Conventionally, CRT (cathode ray tube) display devices and liquid crystal display devices have been put into practical use as display devices that visually display image information converted into electrical signals.

Among these, the CftT display device is the most commonly used and highly reliable device, but it is suitable for displaying fine-sized characters such as those used in newspapers and magazines, especially fine characters with a large number of strokes such as kanji. Displaying the image in its original size is not possible due to resolution issues. Although the images are enlarged to make them easier to decipher, the number of characters that can be displayed on the screen decreases in inverse proportion to the enlargement rate, which causes the problem that the amount of information per screen decreases. If displayed continuously for a long time, the screen will burn in and the display performance will decrease. Furthermore, if the screen flickers, your eyes will get tired.

Next, liquid crystal display devices are display devices that have recently been put into practical use, but like CRT display devices, they do not have sufficient resolution, and large screen ones are difficult to produce and expensive. There is a problem.

Therefore, the present applicant previously proposed an image display device using electrophotography as a third image display device that does not have the above-mentioned drawbacks (Japanese Patent Application No. 56-197410-1974).
No. 13). This display device reproduces and displays image information as a toner image, has excellent resolution, makes the image easy to see, can be manufactured with a large screen at a relatively low cost, and is a highly reliable device. Image display devices using electrophotography are
For example, by scanning an endless belt-shaped electrophotographic photoreceptor with a light beam modulated by an image signal, an electrostatic latent image is sensed on the photoreceptor, and this latent image is applied with toner. A toner image is formed by development, and the toner image forming area on the photoconductor is moved to a display section where the toner image can be visually viewed on the display section.After the display is finished, the photoconductor is moved to clean the toner image. The photoreceptor can be used repeatedly by cleaning and erasing the image.

However, image display devices using electrophotography have the disadvantage that the display speed is slow because the photoreceptor serving as the display surface moves between the image forming section and the display section.

In addition, when the image of the original is read by the reading unit and converted into an electrical signal, and this signal is sent to an image display device using electrophotography to display the image, the currently displayed image and the previously displayed image or If the images to be displayed next are related, there is a problem in that it takes a very long time to view these images alternately. For this reason, when searching and reading images of a large number of manuscripts, there is a problem in that the cumulative time required is even longer and work efficiency is lower.

An object of the present invention is to solve the above-mentioned problems and to provide a costume story that can alternately display and read related images in a short time and shorten the search time. .

The present invention will be explained below using the drawings.

, FIG. 1 is an external view of an image processing system to which the present invention is applied. 1 is a control unit (hereinafter referred to as a work station) which includes a microcomputer for system control, an internal memory composed of RAM, ROM, etc., and a small external memory composed of a floppy disk, a hard disk, etc. Reference numeral 2 denotes an input unit of the digital copying machine, which is a document reader that converts document information of a document placed on a document table into an electrical signal using an image pickup device such as a CCI.

Reference numeral 3 denotes an output unit of the digital copying machine, which is a high-speed printer such as a laser beam printer that records an image on a recording material based on information converted into an electrical signal.

Reference numeral 4 represents an image file that can be used to record a storage medium such as an original disk or a magneto-optical disk, and in which a large amount of image information can be written and read. The microfilm file 5#'i is equipped with a microfilm search section and a microfilm reader section which converts the searched image information on the microfilm into an electrical signal using an image pickup device. Reference numeral 6 denotes a display section that displays image information photoelectrically read by an image sensor of a digital copying machine and a microfilm file, or image information read out from an image file. By irradiating the photoconductive layer with laser light modulated according to the input image signal through the substrate, an electrostatic latent image is created on the photoconductive layer according to the brightness of the image light. This is a high-resolution display device that forms a display image by developing the formed latent image with conductive and magnetic toner (developer) held on a toner carrier. 7 is a cathode tube display device (hereinafter referred to as a CRT) that displays image information photoelectrically read by an image sensor (reader) of a digital duplex and microfilm file, image information read from an image file, system control information, etc. ).

Cables 11-16 electrically connect each input/output device. Further, reference numeral 20 denotes a keyboard provided in the control unit 1, and by operating this keyboard 20, commands for operating the system, etc. are issued. Reference numeral 21 denotes an operation panel for issuing operation commands for the digital copying machine, and includes setting keys for the number of copies, copy magnification, etc., a copy key 22 for instructing the start of copying, a numerical display, and the like.

FIG. 2 is a block diagram showing the circuit configuration of the image processing system shown in FIG. Each block corresponding to that in FIG. 1 is given the same number as in FIG.

First, each block in the control section l will be explained. 20#'ig
i The keyboard 20 shown in the figure is used by the operator to input operating commands for the system. 32 is a communication interface that enables information to be exchanged with other similar systems or terminals using a communication line such as a local area network. A floppy disk 33 stores a system control program, a database for storing images of image files, and the like.

This is a CRT interface for exchanging information with the 34UCRT7. CRT7 display II! The lI image is information stored in RAM (random access memory) 47.

35 is an interface for exchanging information with the image file 4; 36 is an interface for exchanging information with the display device 6.

37 is an interface for exchanging information with the microfilm file 5. Furthermore, 38 is an interface for exchanging information with the document reader 2 and printer 3 that constitute the digital copying machine 46.

39 is a microcomputer (for example, Motorola 6
8000) is a central processing unit (hereinafter referred to as CPU). 40 is ROM (memory for exclusive use of!Fit!)
A system control program is written in advance, and the CPU 39 performs control operations according to the program written in the ROM 40. 41URAM,
It is used as the working memory of the CPU 39.

42゜43.44 is composed of 64K DRAM, etc., and the image signal transmitted between each output section (original printer 2, image 1 aperture file 4 or microfilm file 5)
, taken image signal) is a page memory that stores the captured image signal.
This example is structured so that 3 pages of 1iii group are recorded. Reference numeral 48 denotes a 16-bit bus through which signals are transferred from each block within the control unit l.

Reference numerals 11 to 16 are cables for electrically connecting each input/output device as in 6 above, through which control signals and image signals are transmitted. Note that the arrows on the cables indicate the flow of images. Also, the flow of control signals is bidirectional in the cable.

Since the image signals of the document reader 2, printer 3, microfilm file 5, and display device 6 are serial number 41, the input/output interface 38 has a serial to parallel (16 bit) conversion register for importing image number 16. However, parallel (16 bit) for image signal output
→A serial conversion register is provided. Further, the microfilm interface 37 is provided with a serial-to-halal (16-bit) conversion register, and the display device interface 36 is provided with a parallel (16-bit)->serial conversion register.

Next, to explain the flow of the image signal, the display device 6 displays an image for one page selected from among the images for three pages stored in the RAMs 42 to 44. The selection of images to be stored in the page memories 42, 43, 44 is determined by the keyboard 20.

FIG. 3 shows an example of the microfilm file 5, which is housed in a microfilm Fu cartridge 60 and includes a capstan roller 61 and a pinch roller 62.
The film is fed out from the cartridge 60 by a film guide member and guide rollers 63 and 64 (not shown), and is sent to a take-up reel 65 and wound onto the take-up reel 65.

Microfilm F has a frame f in which many patent publications are recorded on pages, and a frame mark ml recorded on the bottom side of each frame.
and an issue mark m2 recorded on the top side of the frame in which information on the first page of each patent publication is recorded. The microfilm F is illuminated by a lamp 66 at a predetermined position,
The information of the illuminated frame is imaged by the lens X 67 on a line image sensor 68 such as a CCD (charge coupled device), and the image sensor 68 reads the information of the frame on which images for one page have been recorded. 70 is a comma mark m1
A frame detector 71 detects the subject mark m2, and a subject mark detector 71 detects the subject mark m2.

The frame mark rnl % mark m2 has a different density from the surrounding area, the lamp 66 and each detector 70. As the mark recording portion of the f microfilm passes through during '71, the light incident on the frame mark detector 70 and the subject mark detector 71 is interrupted by the mark, and a mark signal is output from each detector. By counting the subject mark signal output when the subject mark detector 71 detects a subject mark using a counter, information on a desired subject can be searched, and the frame mark detector 7
Information on each frame can be retrieved by counting the frame mark signal outputted when 0 detects a frame mark in a counting section. Details of the search device can be found in Japanese Patent Application Laid-Open No. 56-544.
Since this is known from Japanese Patent No. 28, the explanation will be omitted. A large amount of image information is recorded on the microfilm, and desired information can be selected using the search function provided in the control section 1.

The image sensor 68 moves relative to the microfilm when the desired information is retrieved and placed at a predetermined position (illumination position), and the image sensor performs horizontal scanning.
Sub-scanning is performed by relative movement, which causes l page (
One frame of image is converted into an electrical signal and read. This image signal (video signal) is stored in any of the page memories 42, 43, and 44 via the microfilm interface 37. For example, the first page of a plurality of pages of original images is stored in the page memory 42, the second page in the page memory 43, and the third page in the page memory 44.

Next, one of the images stored in the page memories 42 to 44 is output to the display device 6 and displayed. The image of the second page is now displayed on the display.
After viewing this display image, use the keyboard 20 to select the third page or the first page 1. When an instruction is given to display the second image, image information, and second information, after the image on the M2 page is erased, the image on the third page or the first page is displayed. , When the image, input, and output sequence is performed as above,
The pages before and after the displayed image are displayed alternately on the display device. Note that when an instruction is given to display the image of the third page, the image of the fourth page of the document is read and stored in the page memory where the image of the first page of this image signal body was stored. be remembered.

FIG. 4 shows details of the display device fjL6.
01 is a vertical device exterior cylinder, 102 is a display image viewing port formed with a large opening on the front plate surface of the exterior cylinder, and 103 is an operation panel with the lower part of the front plate protruding forward and disposed on the upper surface thereof;
104 is a display window glass placed in the window hole 102, 105,1
06. 107 and 108 are arranged in parallel with each other with two axes in the upper and lower parts of the outer device toi in the left and right direction of the outer cylinder, and are individually rotatably supported by bearings.
The endless belt-shaped photoreceptor suspension support roller 109 is an endless belt-shaped photoreceptor suspended and supported by the four rows 2105 to 108.

Note that the photoreceptor does not have to be endless.

This endless belt-shaped photoreceptor 109 (hereinafter simply referred to as a belt) has a base layer made of a transparent sheet 69 such as a polyester sheet, and a metal is deposited very thinly on the outer surface of the sheet to substantially maintain transparency. imparts conductivity while remaining
A flexible book cover with a photosensitive material layer (photoconductive layer) such as CdS formed on the metal vapor-deposited side, and the four rollers mentioned above with the photosensitive material layer outside) S times 1. Supported.

, among the four rollers 105 to 108, the row 2105 is used as a driving roller, and the roller 105 is rotationally driven by a motor M (not shown). Other 3 rows) 106~1
At least one of 0g, e.g. t tri roller 106
act as a belt tension roller and give tension to the suspended belt 109. Therefore, the drive roller 105
When the suspension belt 109 is rotated counterclockwise in FIG. 4 by the motor M, the suspension belt 109 rotates counterclockwise without waving, sagging, or slipping. Along with this rotation, roller 1
Between 05 and 108, the outer surface of the bell 109 on the tension side moves through the display screen viewing hole 102 from the bottom to the top.

Reference numeral 110 denotes a laser beam scanning type image exposure device fixedly arranged in the inner space of the hanging belt 109, which includes a semiconductor laser oscillator 111, a polygon mirror scanner 112, an fθ lens (imaging lens) 113, a reflecting mirror 114, and a transparent plate. 115 and ze. The transparent plate 115f'i is a horizontally long transparent flat plate made of glass or plastic, which is placed in pressure contact with the inner surface of the tensioned belt portion between the belt suspension support rollers 107 and 108 with an appropriate force.

In this image exposure device 110, page memories 42, 43
．． An intermittent laser beam L corresponding to the electric pixel signal supplied from 44 is oscillated from the semiconductor laser oscillator iii at the front of the drawing toward the rotating polygon mirror scanner 112 at the back of the drawing. The laser beam L incident on the scanner 112 is swung in the belt width direction and passes through an fθ lens 113 and a reflection mirror 114. Rollers 107 and 1 in the path of transparent plate 115
The laser beam enters the inside of the belt 109 between 08 and is scanned in the belt width direction. As a result, single image exposure is performed using the laser beam from inside the belt, with this laser beam scanning as a main scanning and the rotational movement of the belt 109 as a cross scanning.

116 is a toner developer disposed on the outer surface side of the belt portion between rollers 107 and 108, and has a width equal to or equal to the belt width;
It has a slightly wider development range. In addition, transparent plate 11
5 is disposed with the lower surface of the lower common tangent of the rollers 107 and 108 slightly protruding downward, so as to be in suppressed contact with the inner surface of the bell 109.

The developing device 116 is provided with a sleeve 135 having a magnet 134 inside, and a magnet 134Vi developing motor (
(not shown) rotates in the direction of the arrow. sleeve 1
A DC developing bias voltage is applied between 35 and the conductive layer of belt 109 .

Here, image formation, display, and image erasing operations of the display device will be described.

First, after operating the keyboard 20 to set the necessary conditions such as checking and reading the image information, and specifying the image display position, when a key is input to start displaying, the motor M is driven and the photoreceptor is Belt lO9 rotates at a predetermined speed in the direction of the arrow.

Then designation 1 [IIIIIIll! The laser beam traveling exposure of the TG signal is carried out between the rollers 107 and 108 (bell) 10
9, exposure scanning for two images is performed. At the same time as this exposure, the toner in the developing device 116 acts on the outer surface of the belt, so that toner images corresponding to the exposed images are sequentially formed on the outer surface of the belt 109. When the toner image formed on the outer surface of the belt rotates from bottom to top from the bottom to the top of the display image viewing window 102 as the belt rotates, and moves to the designated window range position, the belt 109 is rotated. will be stopped. As a result, an image is displayed in the window hole 102, and the image is visually recognized through the display window glass 104. Next, when the shimotor M is driven by the belt re-rotation operation command, the bell 109 moves again in the direction of the arrow, the next display image moves to the window hole range position, and the next screen is displayed. After the image is displayed, the toner image on the outer surface of the belt reaches the toner developing device 116 as the belt rotates, where it is cleaned and removed by a developing brush, and immediately after this cleaning, it is newly exposed and developed. By receiving the toner image, a new toner image is formed. As mentioned above, the developing device also serves as a cleaning means. In this way, image information is reproduced and displayed as a toner image, and the image is exposed using a very thin laser aperture.
It is possible to display high-resolution images that allow fine characters and other images to be easily and clearly displayed, and because it uses a toner application method at the same time as exposure, it is extremely simple and does not require corona charging means or special cleaning means. With this configuration, it is possible to construct a highly reliable display device that can be manufactured at a relatively low cost even with a large screen, and is less likely to malfunction or deteriorate in photoreceptor.

FIG. 5 shows an example of the configuration of the control section of the device shown in FIG.
Reference numeral 9 denotes the CPU shown in FIG. 2, which recognizes operations specified by the operator based on various input signals from the keyboard 20, such as an instruction for an image to be searched, an instruction to start a display operation, etc., and performs a predetermined operation. control and manage. The indigo keyboard 20 has a switch S for setting to display a new image.
Switch S to set to display the last displayed image
There is. Switch S is a switch that changes the image formed on the belt, forms a new image on the belt, and instructs the selected page memory to store the new image to be displayed next. Further, the switch S2 is a switch for instructing to change the image formed on the belt to form the image previously displayed on the belt.

171 is a control circuit for the motor M for rotating the roller 105 that drives the belt 109; 74 is a developer drive circuit that drives the developing motor of the developer 116 and applies a DC developing bias voltage of +200V to +300V to the developer; 175
176 is a circuit that drives the scanner 112, and 176 is a circuit that drives the laser oscillator 111. Also 177 is pe, a,
-) A clock sensor, such as a photo encoder mounted directly on the shaft of the drive row 2105;
A pulse P is generated each time the drive roller 105 rotates by one angle, that is, each time the bell 109 moves a certain distance. The CPU 39 counts the pulses, measures the amount of movement of the belt, and controls movement and stopping of the belt.

The scanner drive circuit 175 drives the scanner 112 which scans the laser beam from the oscillator Ill in the main scanning direction. A laser drive circuit 176 controls the laser oscillator 111 and turns the laser beam on and off according to the image signal.

FIG. 6 shows the flow of the operating procedure when the one day display command is lost. First, the two 1s to be displayed in step 200
Input the address (search code) of the IIII image on the keyboard 20 to instruct the inspection of the microfilm file 5,
Next, switch S1 on the keyboard 2° is operated to instruct display of the th group (step 201). Onnyoshi microfilm file 5 of switch SI is gaEIIL,
When the search operation starts (step 202), the microphone tff
7 (Search the desired Ml image in Lum file 5,
The searched first painter is read by the image sensor v68 and this first painter is stored in the page memory 42 (step "203").
A desired second painter is searched, the searched second painter is read by the image sensor 68, and this second painter is stored in the page memory 43 (step 204) o After the first image is stored , the image signal stored in the page memory 42 is sent to the exposure device 10 (step 205), and the motor M is driven, the roller 105 rotates in the direction of arrow a, the bell + 109 moves, and the developing Tanabata is driven and magnet 1
34 is rotated, and a developing bias voltage is applied to the developing device 116 on the page (step 206). When the belt 109 rotates, counting of pulses P is started (step 207), and the belt 109 is exposed and scanned by a laser beam (step 208). As the laser beam scans belt 109, it is modulated by the image signal of the first image stored in memory 42.

When the recording of one image's worth of image signals to the belt 109 is completed (step 209), the developing motor stops when the rear end of the exposure area of the belt 109 passes the developing position, and the developing bias power source is turned off. (Step 210). Sot
When the count value of the pulses P reaches a predetermined value (step 211), the motor M stops and the belt 109 stops (step 212). At this time, the first image formed on the belt 109 is placed in the display window hole 102, and the operator
You can view the images.

Here, for example, if the first image is an image of the first page of the manuscript, and the second image is an image of the second page, the image of the first page is stored in the memory 42, and the image of the second page is picture 1
The image will be stored in the memory 43.0 If you have finished viewing the images on the first page and want to display the images on the second page next, in step 215, a new image will be displayed next to the image on the next page. The image is W, the image of the third page (the third
The user enters the address of the image (image) on the keyboard 20 to instruct a search for the microfilm FI/I 15, and operates the switch S on the keyboard 20 to instruct the start of display (step 216). When the switch SI is turned on, the microfilm file 5 is driven and the search operation starts (Step 217), the desired third page image in the microfilm file 5 is searched, and the searched image is transferred to the image scanner 68. The image U of the third page is read and stored in the memory 44 (step 218).

The image signal stored in the memory 43 at the time of searching and reading the image of the third page is sent to the exposure device i.

(step 205), and thereafter steps 206 to 2
After 12 years. That is, the motor M is driven and the image of the second page stored in the memory 43 is written onto the belt 109 by a laser beam. When the image of the second page formed on the belt lO9 is displayed on the display unit 2, the belt stops.

The previously displayed image on the first page is removed by cleaning with a developing brush when it reaches the developing unit 116 as the belt moves in the direction of the arrow. Immediately after this cleaning, the image is exposed again. A new toner image is formed by undergoing development.

After that, if you want to read the image of the first page displayed last time again, operate switch SR. (Step 20)
5) After steps 206 to 212, the image of the first page is formed on the belt and displayed on the display section again.

After the second viewing of the display image 1 of the first page, the switch S is turned on again in step 220, and the memory 4
The image signal of the second page displayed last time stored in 3 is sent to the exposure device 10, and the image of the second page is displayed on the display unit again. Therefore, when the switch S2 is operated, the previously displayed image can be redisplayed, and by repeatedly operating the switch S, two related images can be alternately displayed in a short period of time.

Next, when the image of the second page is displayed on the display section [6, if you want to display the next new image, that is, the image of the third page, in step 215, the next new image is displayed. Input the address of the image, that is, the image of the fourth page, into the keyboard 20 to instruct a search for the microfilm file 5, and then operate the switch S on the keyboard 20 in step 216.
The search operation starts and the microfilm file is found in the fourth
The image of the page is searched, the image sensor 68 reads the searched image, and the image of this fourth page is stored in the memory 42 (step 218). Therefore, the contents of memory 42 are changed. Searching and reading images on page 4 9
At the same time, the third item stored in the memory 44 to be displayed next is displayed.
The image signal of the page is sent to the exposure device IO (step 2
05), thereafter, the image of the third page is displayed on the display section through steps 206 to 212. After reading the displayed image on the third page, steps 215 to 212 are repeated, and the memories 42 to 44 contain the previously displayed image and the currently displayed iI! 111M! Then, a new image to be displayed next will be stored. Therefore, switch S,
By selectively operating , S, it is possible to selectively display either the previous displayed image, the currently displayed image, or a new image to be displayed next, and also to display multiple related images mutually. You can read it while comparing it to . Memory 42~
44 does not necessarily need to store images of pages, but can store arbitrary images to be displayed in order. When displaying the next new image, if there is no next new image to be displayed, step 215 is omitted and switch S is operated in step 216. In this case step 217.21!3 is omitted and the microfilm file is not driven.

In the embodiment described above, images retrieved from the microfilm file 5 are sequentially displayed, but images retrieved from the image file 1 4 can be displayed in the same manner as described above.

Further, in the embodiment, the belt 109 is moved in a fixed direction, but the belt 109 may be moved back and forth by rotating the motor M in the forward and reverse directions.

FIG. 7 shows another embodiment of the present invention, in which a charger 301. Exposure device 302. A cleaning device 304 such as a fur brush is arranged at a cleaning device 303.

FIG. 4 shows an image display device to which the present invention can be applied.

The present invention is not limited to the one shown in FIG. 7, but can be applied to any device that records or erases images by moving a belt-shaped image carrier.

As described above, according to the present invention, there is provided a carrier moving means for moving an image carrier from an image forming means to a display section, an instruction means for instructing to change an image displayed on the display section;
(including cases in which images stored in the storage means are selectively changed or not changed based on instructions from the instruction means) and means for outputting images selected from the storage means to the image forming means. Among them, a desired image can be displayed in a short time, and the time required to sequentially display a large number of images can be shortened.

[Brief explanation of the drawing]

FIG. 1 is an external view of an image processing system to which the present invention is applied;
Figure 2 is a block diagram showing the circuit configuration of the image processing system, and the third diagram is a diagram showing the configuration of the microfilm file.
FIG. 4 is a diagram showing the configuration of the display device, FIG. 5 is a control block diagram of the display device shown in FIG. O which is a schematic diagram showing an example. 1... Control unit 3... Printer 4, Image file 5, Microfilm file 6... Display device.

Claims (1)

[Claims] A reading means reads one image and converts it into an electrical signal, a storage means stores image signals of a plurality of pages outputted from the reading means, and one image stored in the storage means is converted into an image 11j!
An image forming means for forming an image on a carrier, a display section through which the image on the image carrier can be viewed, a carrier moving means for moving the artist carrier from the image forming means to the display section, and an image displayed on the display section. A display comprising an instruction means for instructing to change the image, and a means for changing the image stored in the storage means to a selected one based on the instruction from the instruction means and outputting the selected image from the storage means to the image forming means. Device i1゜