JPS58121029A - Color printing device - Google Patents

Abstract

PURPOSE:To print a static picture at a low cost and with a high quality, by providing a band-like light energy radiating part on a single electronic gun type CRT screen surface, and combining an electric scanning means of an electronic beam and a mechanical scanning means of a color recording medium. CONSTITUTION:As for a CRT601, a fluorescent body having light emitting colors of red, green and blue is formed like a band, on the inside surface of an electronic gun 616 side of a face plate 602, and on the face plate, a display picture is moved and displayed. By an electric signal 612 for controlling a movement of a display picture, an electronic beam 617 crosses fluorescent bodies 603R, 603G and 603B in order, makes them emit light, and forms a picture. A color recording medium 607 held by a holder 621 is made to synchronize with said display picture, is moved by shifting it by each necessary picture element, and a visible image is obtained through a developing device 609.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an i-gun type CR
The present invention relates to an apparatus for obtaining high quality color prints without causing defects such as image distortion and unevenness.

Conventionally, this type of device has the following methods: (1) A method in which an image on a color CRT is photographed with a camera.

(2) As shown in Figure 1, a single black and white CRT 101
The still image displayed on this CRT 101 is colored red 102. Blue 103. A method in which filters such as green 104 are sequentially operated, and a recording medium 106 such as a color film is overlaid and exposed through an optical lens 105.

(3) As shown in FIG. 2, a red CRT 201 is equipped with a phosphor screen that emits red, blue, and green light, respectively. Blue CRT202. Using three line CRT203,
The images on these CRTs are transferred to the dyphromic board 204.20.
5. A method of exposing and combining light onto a color recording medium 209 through reflecting mirrors 206 and 207 and an optical lens 208.

(4) As shown in Figure 3, the fiber plate 30
1 and red 302. Blue 303. A CRT envelope 308 is equipped with a screen coated with three types of phosphors consisting of green 304, and a red electron beam 305. Using a recording tube containing an electron gun that generates an electron beam 306 for blue color and an electron beam 307 for green color, each phosphor (302 to 304) is scanned with each electron beam (305 to 307) to obtain a color image. A method in which a latent image is formed on the recording medium 309 and then developed into a visible image.

However, with the method described in (1) above, the electrical distortion on the CRT and the distortion of the camera optical system combine to make it impossible to obtain high-quality prints, and it takes time to produce a visible image. There are drawbacks.

The method described in (2) above is an optical method and requires a filter exchange mechanism and a lens mechanism, so it generally has the disadvantage that the device becomes larger and more expensive. On the other hand, the method using three CRTs in the previous section (3) is 1. Each CRT
If the image position and size cannot be adjusted accurately, there will be fundamental flaws such as color shift, and correcting this will require a complex and expensive electrical control circuit. Even if you do this, there is a drawback that it is not perfect1, and furthermore,
In the method (4) above, it is difficult to maintain parallelism and positional accuracy of each scanning line.

Therefore, the present invention has been proposed to overcome the problems of the color printing devices using the various conventional methods described above, and its purpose is to reduce the amount of still images transmitted by electric wire. To provide a color printing device capable of obtaining high quality color prints at low cost.

That is, in order to achieve the above object, the present invention uses a single electron gun type CRT, provides a band-shaped light energy emitting section on the screen surface of this CRT, and connects an electric scanning means for an electron beam and a color recording medium machine. It is characterized in that it is combined with a means of traveling.

Next, embodiments of a color printing apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.

FIGS. 4(a), (b), and (c) show an embodiment of a CRT 401 used in the apparatus of the present invention. That is, the C RT 401 used in the present invention has a flat configuration in which the slit-like window portion is formed of a rectangular face plate 402. This CRT 401 has a plurality of fluorescent surfaces 403 emitting different colors on the inner surface of a face plate 402 (on the electron gun side). For example, as shown in FIG. 4(C), the fluorescent surface 4.03 has red 403R, green 403G,
and blue 403B, each of these phosphors 403R and 403G.

403B is applied in a band shape so that the diameter is 5 times or more the scanning beam diameter.

FIG. 4(d) shows an alternative to the rectangular face plate 402 attached to the CRT 401.

As shown in (e), the inner surface of the face plate 402 (
A white phosphor 403 is coated on the electron gun side), and a red filter 403 is coated on the outer surface of the face plate 402 facing the white phosphor 403.
'R, green filter 403°G, and blue filter 4
03'B, and each of these filters 403"R, 4
03°G and 403'B are arranged in a band shape so that the diameter is 5 times or more the scanning beam diameter.

Next, we will explain the principle of the apparatus of the present invention which performs color printing using the CRT having the above structure.
).

FIG. 5(a) shows a static color image 501' of the Rusk scan type displayed on a color monitor display. A CRT rectangular face plate 502 having the above-described configuration is obtained by sampling a part of this still color image.
[See Figure 5(b)] 0 The displayed image on this FOT is displayed in three color bands of red, blue, and green.
Its brightness is modulated by an image signal of a color corresponding to each phosphor. Furthermore, a part of the color still image 5 is displayed in a fixed direction 504 like an electronic bulletin board on a fluorescent screen that emits red 503R, green 503G, and blue 503B, which are formed in band shapes on the face plate 5o2.
Display while moving at a constant speed. Therefore, as shown in FIG. 5(c), the image moving on the face plate 502 in this way is
The image is projected onto a color recording medium 507 that moves in synchronization with the movement of the image. On the other hand, the face plate 5
Red 503R, green 503G, blue 50 formed in a band shape on 02
As shown in FIG. 5(d), the electron beam 505 scans across the phosphor 503 having each luminescent color such as 3B, and when passing through the phosphor 503, the electron beam 505 crosses the phosphor 503 having each luminescent color. Select the color image signal corresponding to the selected signal 510
Brightness modulation is performed in °. That is, in FIG. 5(d), from time to to tl when the electron beam 505 scans the red light body 503R, the electron beam current is modulated by the red component image signal 514R, and the luminance of light emitted by the red light body 503R is adjusted. Modulate according to the input signal. Below, similarly, green 50
3G.

From time t1 to time t2 when the electron beam 505 scans each of the blue phosphors 503B. From t2 to t3, the green component (
514G) and the brightness of the electron beam current is modulated by the image signal of the blue component (514B). Note that the signal 51
0'' indicates the image signal selectively synthesized in synchronization 1-2 with the scanning position of the electron beam 505 as described above, and this signal 5
Brightness modulation in the CRT 501 is achieved by 10°.

Therefore, when the brightness-modulated electron beam 505 crosses the red light body 503R, only the red information of the input image signal is recorded as a latent image on the color recording medium 507. Similarly, the color recording medium 507 is exposed to green and blue in different colors, but by moving in synchronization with the image and overlapping recording, one completed color image can be obtained. [See Figure 5(c)].

FIG. 6 is a schematic diagram showing the overall configuration and functions of a color printing apparatus according to the present invention.

As mentioned above, the CRT 601 has red 603R on the inner surface on the electron gun 616 side of its Runny plate tro 02.

A band of phosphors with luminescent colors of green 603G and blue 603B
A display image is displayed moving on the face plate 602 like an electronic bulletin board.

The electrical signal 612 that controls the movement of the displayed image in this way is
It is applied to a deflection coil 615 via an amplifier 613. Therefore, by this signal 612, the electron beam 617 is sequentially directed to the phosphors 603R, 603 on the face plate 602.
G, 603B, it emits light while crossing it, forming an image that moves at a constant speed.

Further, the CRT 601 includes a preset display light body 603R, as previously explained with reference to FIG. 5(d).

A switching signal No. 7 619 that performs a switching operation at a time determined by the band width of 603G and 603B and the scanning speed of the moving display image is applied from the switching controller 622 to the color switching switch 20, and the red signal 614R, green signal 614G, and blue signal are sequentially transmitted. 614B and send this selected signal to the amplifier 618.
The signal is supplied to the CRT 601 via the CRT 601.

Therefore, in the CRT 601, the 'electron beam 617 is amplified by the amplifier 618, and each color component signal (61
4R, 614G, 614B).

On the other hand, a color recording medium 607 such as a color film or color photosensitive paper has an optical system 606 between it and the CRT 601.
It is installed in a dark box 610 via the.

In this case, the color recording medium 607 is
It is held in a holder 621 equipped with. Also, this holder 6
A developing device 609 is provided corresponding to 21.

The feed roller 608 branches a deflection signal 612 for controlling the movement of an image displayed on the face plate 602 of the CRT 601 and converts it into an electric signal 612.
By supplying the color recording medium 607 held in the holder 621 to the mechanism control circuit 611, the color recording medium 607 held in the holder 621 is shifted by necessary pixels in synchronization with the displayed image. As a result, the color recording medium 607 is
The image is then sent to the developing device 609 and developed to obtain a visible image. In this case, the holder 621 is designed to send out the color recording medium 607 through the optical system 606 at the same speed as the moving speed of the projected image of the display image of the CRT 601.

Through the above-described operation, the color recording medium 607 is exposed many times with images formed by the three types of phosphors, each of which is overlapped by a required number of pixels, thereby forming a color latent image. At this time, only the color components of the image are exposed with a shift, but the position of the image on the recording medium F does not shift. As described above, according to the present invention, by projecting the entire still image onto a color recording medium while changing the color components and shifting a part of the still image little by little, the amount of exposure of each color component to the color recording medium can be adjusted. is proportional to the incident signal component.

Therefore, by performing a development process suitable for this color recording medium, a color print of the entire still image can be obtained.

The developing device 609 used in the apparatus of the present invention requires changing the configuration according to the characteristics of the color recording medium.
A thermal developer is used for color recording media that can be visualized by heating, and a liquid processing developer is used for color recording media that can be visualized by chemical treatment.

Furthermore, for commercially available instant color photographic paper, a pressure rolling roller mechanism, etc., which is compatible with its developing mechanism, is used. ) In the embodiment described above, as shown in FIG.
In contrast to 02, the scanning direction of the electron beam was formed in a band-like manner.
Although the direction 710 is transverse to the seed phosphors 703R, 703G, 703B, it is also possible to scan in the direction 711 perpendicular thereto. In this case, the inside of each phosphor is scanned with a plurality of scanning lines to expose the color recording medium.The device of the present invention can also be applied to a vector scanning type color display as a driving method for a CRT. Can be applied. In this case as well, the direction of movement of the color recording medium is the direction across the band-shaped phosphor. Also,
Even when the electron beam is vector-driven, the display image on the face plate of the CRT is modulated in brightness by a color image signal corresponding to the phosphor at the scanning position of the electron beam, as in the embodiment described above. be. Other CRTs
Color prints can be easily obtained by carrying out the same methods as described above for moving the above image, moving the color recording medium, etc.

Furthermore, the optical system used in the apparatus of the present invention has the disadvantage that when a conventional lens is used, the optical distance thereof is generally large. Therefore, in order to shorten the optical path, it is effective to use a reflector, a mirror, etc., but in this case, the configuration becomes complicated, which is not preferable. In such a case, it is effective to use a microcylindrical lens 801 as shown in FIG. 8(a). In other words, the micro cylindrical lens 801 can have a positive image or an inverted image relatively close to the lens 801,
An array 81 includes a large number of lenses 801 of this type arranged regularly.
0 [see FIG. 8(b)] and use this as an optical system, it is advantageous for downsizing the optical system.

In the above embodiment, 1 is used as a means for emitting the emission spectrum of the phosphor from the face plate of the CRT.
, we have shown cases in which the phosphor itself or a filter is used, but in addition to taking into consideration the emission intensity characteristics, compatibility with the photosensitizer of the color recording medium, and improvement of image quality by eliminating flare, etc. , for example, FIGS. 9(a) and (b)
As shown in FIG.
01G.

901B and filters 902R, 902G, 902B
[See Figure 9(a)], the synergistic effect of the radiant energy characteristics of these phosphors and filters (901R and 902R, 901G and 902G, 901B and 902B)
) [see FIG. 9(b)].

As is clear from the embodiments described above, the apparatus of the present invention can expose a color still image onto a color recording medium by using one single electron gun type CRT, and can also expose a plurality of CRTs. Compared to the case where the beam width or electrical characteristics that determine brightness and resolution are negligible, the configuration is extremely simple, and there is almost no need to correct color misalignment caused by positional misalignment, resulting in high quality color. A color printing device capable of producing prints can be provided at a low cost. Therefore, the color printing apparatus of the present invention can be widely applied as a printing apparatus for color graphics and other terminal equipment.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams showing the principles of a conventional color printing device, and FIGS. 4(a) to 4(e) are explanatory diagrams of a CRT used in the color printing device according to the present invention, (a) is a partially cutaway perspective view, (b) is a front view showing one embodiment of the face plate, (C) is a side view of figure (b), and (d) is another embodiment of the face plate. 5(e) shows a side view of FIG. 5(d), and FIGS. 5(a) to 5(d) are diagrams explaining the principle of the color printing apparatus according to the present invention, and FIG. 5(a) shows a color stationary front view of the image,
(b) is an explanatory diagram of the operation of the CRT shown in Fig. 4, (C) is an explanatory diagram of the exposure state to a color recording medium, and (d) is an explanatory diagram of the operation of the electron beam of the CRT shown in Fig. 4. ,
FIG. 6 is a block diagram showing the basic configuration of the device of the present invention, and FIG.
The figure is an explanatory diagram of scanning of the electron beam on the face plate of the CRT used in the device of the present invention, FIG. 8(a),
(b) is an explanatory diagram of the optical system used in the device of the present invention, (a) is a side view of a micro cylindrical lens, (b) is an explanatory diagram of (a)
A perspective view of an optical system array constructed by combining the lenses shown in the figure is shown, and FIGS. 9(a) and 9(b) show still another embodiment of a CRT face plate used in the apparatus of the present invention. 0101, 201.202.203, (a) is a configuration diagram, and (b) is a radiation energy characteristic curve diagram.
...Single electron gun type CRT105, 208.506.6
06.801...Optical lens (optical system) 106, 20
9.309.507.607...Color recording medium 20
4, 205...Guifloric board 206, 207...
・Reflector 301...Fiber plate 308...CRT envelope 305, 306.307.505.617...Electron beam 401.501.601...CRT envelope, 502.602.702. ...Face plate 403...Fluorescent surface 501'...Still color image 504...Movement direction 604...Movement direction of color recording medium 608...Feed roller 609...Developer 610...・Dark box
611... Mechanism control circuit 612... Electric signal 613.618... Amplifier 615... Deflection coil 616... Electron gun 619... Switching signal 6
20...Color selection switch 621...Holder
622...Switching controller 710, 711...Electron beam scanning direction 810...Optical system array Patent applicant Japan Radio Co., Ltd. Figure 1 1n1 (//- Figure M4 (b) Figure M5 (d)

Claims (1)

[Claims] (1) In a device that photoelectrically converts the electric signal of a color still image into a visible image and prints it in color, a single electron gun type CRT has a screen on which a plurality of phosphors of different emission colors are coated in a band shape; an optical system for optically transmitting the image displayed on the single electron gun type CRT to a color recording medium; and a means for moving the color recording medium in synchronization with the image displayed on the single electron gun type CRT. , and a color recording medium developing means. (2. In the color printing apparatus according to claim 1, the phosphors emitting different colors on the screen of the single electron gun type CRT are painted in strips in the moving direction of the photoreceptor, and The width of each application has a distance of at least five times the diameter of the electron beam spot, and the electron beam scans the FOT screen in a planar manner, and the beam brightness corresponds to the phosphor through which the beam passes. A color printing device configured to selectively modulate an image signal and display a portion of a still image.