JPH0361945B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ID (Identification) card issuing machine.

Traditionally, ID cards have been created by writing images and other information on a sheet of photographic paper using silver halide photography, forming images on plastic cards using engraving methods, or creating images using electrophotography. It is also forming. However, although the silver halide photography method has high resolution, it has problems in terms of photosensitive material management and cost, and it takes a long processing time to form an image. The disadvantage is that it takes a long time (usually about 1.5 minutes). In addition, electrophotography
The drawback is that it is difficult to resolve more than 100 lines/inch and the reproducibility of halftones is poor, resulting in degraded image quality. Furthermore, when attempting to create ID cards using photosensitive materials other than those mentioned above, there is a drawback that the photosensitive materials have low sensitivity and cannot be used for low-light images such as images displayed on a CRT. be.

Then, the image on the CRT is passed through the optical system,
The first example of a conventional device for making hard copies using electrophotography is
As shown in Figures A and B, CRT electric circuit 1
The image displayed on CRT2 via mirror 3,
The light is applied to a photosensitive plate 7 via a lens system 4 and mirrors 5 and 6. However, the photosensitive plate 7
A back electrode 8 is disposed at a position opposite to the back electrode 8, between which a recording paper 10 from a recording paper roll 9 is conveyed by a drive roller 11 and electrophotographed. After the electrophotographic recording paper 10 is cut into a predetermined length by a cutter 12, it is developed with a developer 14 via a developing roller 13, and is outputted after passing through a drying section 15. ing. However, with such conventional devices, maps, comics,
In the case of line drawings such as documents, it is possible to obtain high-quality hard copies, but for images with halftones such as photographs and paintings, the gamma of electronic photography is large, so it is said that the reproducibility of hard copies is poor. There are drawbacks.

In view of the above, an object of the present invention is to provide an ID card issuing machine that does not have the above-mentioned drawbacks.

This invention will be explained below.

FIG. 2 shows an embodiment of the present invention as a whole. A person 22 is photographed as necessary image information using a TV camera 21, and a halftone image signal (100~ 120 lines/frame) and then passes through the CRT control circuit 24 and is displayed on the CRT 25. In addition, information such as names and numbers can also be accessed from Keyboard 2.
It is possible to input and display from 6 onwards. In this way, the image displayed on the CRT25 screen,
The image is reduced or enlarged (or the same size) through a lens 27 to produce an image equivalent to 20 to 40 lines/inch,
This image is projected onto a photosensitive plate 31 disposed in front of a transparent film 30 for intermediate recording to form an electrophotograph.
Note that this example is an example of electrophotography using the TESI method, and a back electrode 32 is provided on the opposite side of the photosensitive plate 31.

The transparent dielectric film 30 is connected endlessly and is conveyed in the direction of the arrow by the driving roller 33, and the charge pattern formed on the transparent dielectric film 30 is transferred to the developing roller 34. The image is visualized by a developer 35 through the . This visualized transparent dielectric film 30
The above electrophotographic image (halftone toner image) 36 is irradiated with a strong light source (for example, xenon, ultra-high pressure mercury lamp) 40, and the transmitted light is reduced and projected onto a photosensitive recording material 42 through a lens 41, and exposed for a short time. Note that the photosensitive recording material 42 is rewound from the roll 43,
The electrophotographic image 36 on the transparent dielectric film 30 is removed by a cleaning roller 37 so that the transparent dielectric film 30 can be reused. It's summery.

The image thus projected onto the photosensitive recording material 42 is developed with a developer 45, cut into a predetermined length by a cutter 46, and outputted as an ID card 50. Note that a diazo copying material or the like can be used as the photosensitive recording material 42, and if a heat-developable photofixing type diazo recording material having a sulfonate group is used, an ID card can be created by a dry process as shown in FIG. can. In this case, the xenon light source 40 irradiates the electrophotographic image 36 on the transparent dielectric film 30 visualized in the same manner as in FIG. The projected image is developed by an infrared heater 52 and then fixed by a xenon light source 51.
It is cut into a predetermined length with a cutter 46 and output as an ID card 50.

Next, the details of the above-mentioned meshing circuit 23 and CRT control circuit 24 are shown in FIG.
Video signal separation circuit 200 that separates the image signal VS from the camera into a video signal IS and a horizontal synchronization signal HS
and a horizontal synchronization separation circuit 201, an oscillator 202 that generates a concentration curve-shaped AC signal AS having a halftone screen, a phase adjustment circuit 203 that adjusts the phase of the AC signal AS in accordance with a horizontal synchronization signal HS, and a horizontal A horizontal synchronization counter 204 that counts the synchronization signal HS, and a clamp level control circuit 2 that controls the clamp level of the output of the phase adjustment circuit 203 based on the count value of the horizontal synchronization counter 24.
05, and a logarithmic conversion circuit 2 that logarithms the video signal IS.
06, the logarithmic video signal LI output from this logarithmic conversion circuit 206, and the clamp level control circuit 20.
a comparison circuit 207 that compares the reference signal CL outputted from the reference signal CL and outputs a binary signal BS depending on the level of the reference signal CL and the logarithmic video signal LI;
CRT by superimposing horizontal synchronization signal HS on binary signal BS
It has a synchronous superimposition circuit 208 that outputs to a display device. Note that in this embodiment, when the reference signal CL exceeds the level of the logarithmic video signal LI, the logic “1” is generated.
The binary signal BS is obtained as follows.

In such a configuration, the CRT display device
One halftone image is formed using the scanning lines of the book, and approximately 100
Suppose that it is set to display lines/screens. In this case, the clamp level control circuit 205
is set to the same level on the first and fifth scanning lines (Fig. 5A), and the same level on the second and fourth scanning lines (Fig. 5B). ,
The clamp level of the AC signal from the phase adjustment circuit 203 is controlled so that the third scanning line has the highest level (FIG. 5C). Therefore, the comparison circuit 207 uses the reference signal CL and the logarithmic conversion circuit 2.
06 and outputs a binary signal BS which becomes "1" when the reference signal CL exceeds the level of the logarithmic video signal LI. Therefore, in the case of the relationships shown in Figure 5 A to C, the binary signal
The BS will be as shown in Figure 6 A and B. Note that the AC signal AS from the oscillator 202 has a density curve shape of a halftone screen, and the phase of this is adjusted by the phase adjustment circuit 203. In this way, the binary signal BS obtained by the comparator circuit 207 is superimposed with the horizontal synchronizing signal HS in the synchronizing superimposing circuit 208, and this is displayed in halftone on the CRT display device. This display image is then hard-copied using an electronic photograph.

Here, a method of producing a card according to the present invention using various reduction projection methods and transfer methods of an electrophotographic image onto a photosensitive recording material will be explained.

In this invention, the resolution of low-resolution images such as CRT and electrophotography is increased by a method such as reduction projection of an intermediate image, and by projecting the intermediate image with a separate light source, it is possible to improve the resolution of low-resolution images such as CRT and electrophotography, which cannot be achieved by direct projection of CRT images. It also enables short-time exposure of low-sensitivity photosensitive materials. Furthermore, in the electrophotographic transfer method onto sensitive materials, not only photosensitive materials but also heat-sensitive materials can be visualized by heat ray irradiation without using a heat-sensitive element, improving the quality of low-quality images produced by heat-sensitive elements. Furthermore, in the case of photosensitive materials, by irradiating them with a separate light source, it is possible to perform short-time exposure recording even on low-sensitivity materials.

That is, as shown in Figure 7, characters, figures,
Information such as a person's image is input using input means such as a keyboard or a television camera, and is displayed as a soft image on the screen of the CRT display device 300. Then, by forming this display image on the semiconductor 302 through the lens 301, a latent image is formed at high speed, and this latent image is developed by toner development 3 by electrophotography.
03 and visualized. Note that the size of the latent image formed on the optical semiconductor 302 is larger than the final card image. If the optical semiconductor 302 is a transparent material such as polyvinyl carbazole or a two-layer structure of Se and polyvinyl carbazole (route), light is irradiated through the optical semiconductor 302,
The transmitted image of the developed image is reduced and projected onto a photosensitive card 305 using a lens 304 to form a latent image, which is then developed and fixed to create a fixed image card 305A. In this case, even if the photosensitive material of the card 305 has low sensitivity, it can be exposed for a short time by reduction projection using strong light, and even if the electrophotographic image has low resolution, the resolution can be substantially increased by reduction projection. Since the toner image on the optical semiconductor 302 is not fixed, the toner image can be removed after reduction projection and used repeatedly.

On the other hand, when the optical semiconductor 302 is an opaque body (path), the toner image 303 on the optical semiconductor 302 is once transferred to a transparent film 306, light is irradiated through the transparent film 306 in the same manner as described above, and the transmitted image is transferred to the lens. Photosensitive card 305 by 304
A latent image is formed by reduction projection onto the image, and is developed and fixed to create a fixed image card 305A.

In another example of the present invention, as shown in FIG.
Input via input means such as a TV camera, and CRT
It is displayed as a soft image on the screen of the display device 300. This display image is then displayed through the lens 30.
A latent image is formed at high speed by forming an image on the optical semiconductor 302 via the photodiode 1, and this latent image is visualized by toner development 303 using electrophotography. Thus, the toner image 303 on the optical semiconductor 302 is transferred onto a photosensitive card 307 or a heat-sensitive card 308.

In the case of a photosensitive card 307 (route), after light is irradiated from above the toner image 303A, the card 307
The upper toner 303B is removed, developed and fixed to create a card 307A with a fixed image attached. In addition,
In this case, the solid image on card 307A becomes a negative image.

On the other hand, in the case of the heat-sensitive card 308 (route),
Heat rays are irradiated from above the toner image 303C, the toner is thermally colored by its heat ray absorption ability, and the toner 303D on the card 308 is removed to create a card 308A with a fixed image attached. Note that the solid image on the card 308A in this case becomes a positive image.

As described above, according to the present invention, an image can be formed from a low-illuminance material such as a CRT screen even with a low-sensitivity photosensitive material, and it is displayed in the form of halftone dots on the CRT and converted into an electrophotographic image using large pixels. It is possible to avoid the effects of low resolution and deterioration of halftone reproducibility, which are disadvantages of electrophotography. Furthermore, since the electrophotographic image is reduced and projected, it has the advantage of being able to obtain a high-resolution image.

[Brief explanation of drawings]

1A and 1B are a plan view and a side view of a conventional hard copy device, FIG. 2 is an overall configuration diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing a partial modification thereof. FIG. 4 is a block diagram showing details of the meshing circuit and CRT control circuit according to the present invention.
FIGS. A to C and FIGS. 6A and 6B are diagrams for explaining the operation, and FIGS. 7 and 8 are diagrams each showing an example of the recording method on a card according to the present invention. 1...Electric circuit for CRT, 2...CRT, 3,
5, 6... Mirror, 4... Lens system, 7... Photosensitive plate, 8... Back electrode, 9... Recording paper roll, 10
... Recording paper, 11 ... Drive roller, 12 ... Katsura, 13 ... Developing roller, 14 ... Developer, 15
... Drying section, 21 ... TV camera, 22 ... Person, 23 ... Shading circuit, 24 ... CRT control circuit, 25 ... CRT, 26 ... Keyboard, 27
... Lens, 30 ... Transparent dielectric film, 31
... Photosensitive plate, 32 ... Back electrode, 33 ... Drive roller, 34 ... Developing roller, 35 ... Developer, 3
6... Electrophotographic image, 37... Cleaning roller, 40... Strong light source, 41... Lens, 42...
...Photosensitive recording material, 43...Roll, 44...Conveyance roller, 45...Developer, 46...Katsu, 50...
...ID card, 51...Xenon light source, 52...
Infrared heater, 200...video signal separation circuit,
201... Horizontal synchronization separation circuit, 202... Oscillator, 203... Phase adjustment circuit, 204... Horizontal synchronization counter, 205... Clamp level control circuit, 206... Logarithmic conversion circuit, 207... Comparison circuit, 208... ...Synchronous superimposition circuit, 300...CRT
Display device, 301, 304... Lens, 302...
...Optical semiconductor, 303...Toner development, 305,3
07,308...Photosensitive card, 306...Transparent film.

Claims (1)

[Claims] 1 Display the image information to be recorded on the card on a CRT display device via a TV camera and a meshing circuit,
This display image is displayed as a halftone dot image on a transparent film by electrophotography, and the halftone dot image on the transparent film is irradiated with strong light and the transmitted light image is printed on a low-sensitivity material to form an image. , or the above
In a device in which a CRT display image is transferred onto a low-sensitivity photosensitive or heat-sensitive material by electrophotography and an image is formed by irradiation with light or heat rays, the image signal from the TV camera is separated into a video signal and a horizontal synchronization signal. a video signal separation circuit and a horizontal synchronization separation circuit; an oscillator that generates an alternating current signal having a density curve of the halftone screen; and a phase adjustment circuit that adjusts the phase of the alternating current signal in accordance with the horizontal synchronization signal; a horizontal synchronization counter that counts the horizontal synchronization signal; a clamp level control circuit that controls the DC level of the output of the phase adjustment circuit according to the count value of the horizontal synchronization counter; and a logarithmic conversion circuit that logarithms the video signal. and comparing the logarithmic video signal output from the logarithmic conversion circuit with the reference signal output from the clamp level control circuit,
A comparison circuit that outputs a binary signal depending on the level of the reference signal and the logarithmic video signal, and a synchronous superimposition circuit that superimposes the horizontal synchronization signal on the binary signal and outputs it to a CRT display device. , Display the image information as a soft image on the CRT display device, record this soft image on a transparent optical semiconductor by electrophotography, develop it, or transfer the recorded image on the optical semiconductor to a transparent support. After that, this image is reduced and projected onto a photosensitive card to form a fixed image.