JPH01316088A - Crt color video printer - Google Patents

Abstract

PURPOSE:To simultaneously expose three colors by arranging respective belt- shaped red, green, and blue filters on the display picture of a black and white CRT, forming red, green and blue areas, and enlarged-displaying the picture data on each line at a width being inversely proportional to the spectral sensitivity of a sensitive material. CONSTITUTION:In a CRT color video printer to print a color picture on the sensitive material with the use of a black and white CRT 10, belt-shaped red, green and blue filters 13, 14 and 15 are used, and continuously arranged on a filter plate 16 on the surface of the CRT 10. A display surface is divided into three of a red emitting area 17, a green emitting area 18, and a blue emitting area 19, the picture data for one line of the respective three color pictures of the color picture are read, and the picture data for one line at every color are enlarged in the width direction of the light emitting area at the width being inversely proportional to the spectral sensitiveness of the sensitive material at every light emitting area. The belt-shaped area is image-formed on the sensitive material, and three colors can be simultaneously line exposed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a CRT color video blink, and in particular,
The present invention relates to a CRT color video printer that performs simultaneous line exposure of three colors using a CRT.

[Conventional technology]

In order to record high quality color images, a black and white CRT,
A CRT color video printer using three color filters of red, green, and blue is known. In such an apparatus, color printing is generally performed by sequential exposure of three color planes. However, in the case of the three-color plane sequential exposure, since it is a surface exposure, exposure is performed frame by frame, and there is a problem in that it is difficult to expose a long image such as a continuous falling twilight.

In contrast, three flat CRTs emit red, green, and blue light.
Displays each color signal image using an optical system, converts these images into lines using an optical system, forms an image on a photosensitive material, and performs three-color simultaneous line exposure.
An RT color video link is also provided.

[Problem to be solved by the invention]

However, the above-mentioned Triniscope video printer uses a dedicated flat CRT;
Since as many as three are required, there are problems in that the device configuration becomes complicated and the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above two problems, and an object of the present invention is to provide a CRT color video printer that can perform three-color simultaneous line exposure using a portable CRT.

[Means to solve the problem]

In order to achieve the above object, the present invention uses band-shaped red, green, and blue filters, and converts these color filters into black and white color filters.
They are arranged on the display surface of the RT, and the display surface is divided into three areas: a red light emitting area, a green light emitting area, and a blue light emitting area, and one line of image data for each of the three color images is read out and processed accordingly. For each light-emitting area, one line of image data for each color is enlarged and displayed in the width direction of the light-emitting area to a width that is inversely proportional to the spectral sensitivity of the light-sensitive material, and these strip-shaped areas are displayed as a line on the light-sensitive material. This system forms an image in the form of a three-color image and performs simultaneous line exposure of three colors.

In addition, the CRT's phosphor screen is painted with red, green, and blue phosphors in strips to separate the CRT's display screen into a red light-emitting area.
It may be divided into three areas: a green light emitting area and a blue light emitting area.

In addition to adjusting according to the spectral sensitivity of the photosensitive material, when printing a photographic image such as a negative film, when adjusting to correct the color balance of the photographic image, it is necessary to increase or decrease the luminescence width within each luminescence area. It is preferable to do so. Further, it is preferable that each light emitting area is arranged in a row in a direction perpendicular to the scanning line of the CRT.

[Effect]

After the color and gradation of the input color image are corrected, one line of image data for each of the three color images of this color image is read out, and one line of each of these colors is read out for each corresponding light emitting area. The image data for 1 minute is enlarged and displayed in the width direction. As a result, a three-color image for one line of a video image is displayed on a single CRT screen, separated by color and enlarged into a band shape.

The CRT image is formed into a line on the photosensitive material by an optical system and exposed. This exposure is 3 for 1 line.
The color image is enlarged in the width direction to a width that is inversely proportional to the spectral sensitivity of the light-sensitive material, and the light is focused in a line, allowing for proper exposure for one line according to the spectral sensitivity of the light-sensitive material. This allows simultaneous three-color line exposure. Thereafter, in the same manner, the three color images are simultaneously exposed on the light-sensitive material one line at a time. Since the three colors are exposed simultaneously in this manner, the video image can be continuously exposed to the light-sensitive material.

〔Example〕

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

In FIG. 1 showing a CRT color video printer processor, a video image input device 1 is used for reproducing a color video signal recorded on a videotape or video floppy, for example, or a color television camera, or a device for improving resolution. A real-time color video signal captured by a combination of a black-and-white television camera and a three-color filter is input. Furthermore, this video image input device 1 separates the color video signal into red, green, and blue video signals, and converts these into digital signals by A/D conversion. This digitally converted video signal for one frame is subjected to image processing such as color correction, gradation correction, or positive/negative inversion in the image processing section 2, and the video signals of the three colors of the negative image are processed for each frame. The data is written to memories 3a to 3C.

When using inverted color paper instead of normal color paper as a photosensitive material for printing video images, positive/negative inversion is not performed and the input positive image video signal is stored in each frame memory 3a to 3C. write to.

The three-color video signals in each of the frame memories 3a to 3C are read out line by line in response to a read command from the controller 4, and written into the frame memory 5 for line emission. This writing is performed by expanding the width of one line of image data for each color into the light emitting area divided into three for each color so that the same information becomes available in the width direction, with a width inversely proportional to the spectral sensitivity of the photosensitive material. be exposed.

The video signal in the frame memory 5 passes through a switching circuit 6 and then is converted into an analog signal by a D/A converter 7. The CRT drive circuit 8 drives the CRTIO based on this video signal.

A scanning line number setting means 11 is connected to the switching circuit 6 . The scanning line number setting means 11 sets the number of scanning lines to be emitted within the light emitting area of each color based on the correction signal from the color balance correction key 12, and appropriately corrects the color balance of a negative film or the like.

As shown in Figure 2, on the screen of a black and white CRTIO, there is a direction perpendicular to the scanning line of the CRTIO (y direction in the figure).
With almost the same width, red filter 13 and blue filter 14
, a filter plate 16 on which green filters 15 are arranged in rows is arranged. Each filter 13 to 1 of this filter plate 16
5, the CRT display screen is divided into three areas: a red light emitting area 17, a green light emitting area 18, and a blue light emitting area 19.

The filter plate 16 is made by pasting or directly layering red, green, and blue filters 13 to 15 on a transparent glass plate or plastic sheet. Moreover, instead of such a filter plate 16, each of the filters 17 to 19 may be layered on the surface of a black and white CRTIO.

A photosensitive material such as color paper 20 is placed above the CRTIO facing its screen, and the image of the CRTIO is formed into a line on the color paper 20 by a lens 21 and a cylindrical lens 22. Note that the reference numeral 23 in the figure indicates a mask having a slit-shaped opening. The lens 21 is for changing the magnification of the CRTIO image in the scanning line direction (X direction in the figure), and the cylindrical lens 22 is for condensing the CRTIO image in a line shape in the scanning line direction. It is.

Note that the cylindrical lens 2 is used instead of the lens 21.
Another cylindrical lens arranged perpendicular to 2 may also be used.

The color paper 20 wound into a roll is pulled out line by line by a pair of pull-out rollers 24 after exposure of one line. The pull-out roller 24 is rotated by a pulse motor 25, which is controlled by the controller 4 via a driver 26. Note that the reference numeral 27 in the figure indicates a cutter that cuts the exposed color paper 20 frame by frame or by a predetermined number of frames. Also, 28 is
This figure shows a development processing section that develops the exposed photosensitive material.

Next, the operation of the CRT color video printer processor having the above configuration will be explained. 3 color frame memo I733-3C
, a three-color negative image video signal input by the video image input device 1 and image-processed by the image processing circuit 2 is stored. First, when a print key (not shown) is turned on, the controller 4 takes out one line of video signals of a three-color negative image from the frame memories 3a to 3C, and outputs this one line of red video signals. Red light emitting area 1
7 as image data on the scanning line, one line of green video signal as image data on the scanning line of green light emitting area 18, and one line of blue video signal as image data on the scanning line of blue light emitting area 19. , this video signal is written into the frame memory 5 for one line light emission. This writing is performed for each area, with the number of columns being inversely proportional to the spectral sensitivity of the color paper 20. The video signal in frame memory 5 is converted into an analog signal by D/A converter 7 and output to CRT drive circuit 8.

Note that for images that require color balance adjustment, a correction signal is input by the color balance correction key 12, and based on this, the scanning line number setting circuit 11 adjusts each light emitting area 17 to 19.
The number of scanning lines to be emitted is calculated according to the correction signal and outputted to the switching circuit 6. The switching circuit 6 is ON/OFF controlled by the scanning line number setting circuit 11, and passes only the video signals on the set number of scanning lines.

The CRT drive circuit 8 controls the light emission of the CRTIO based on the video signal from the D/A converter 7.

This light emission control is performed as shown in FIG. That is, since the number of light emitting scanning lines in the red light emitting area I7 of the screen is inversely proportional to the spectral sensitivity of the photosensitive material, and these predetermined number of scanning lines are displayed in the same one line image, 1
The red image corresponding to the line is displayed expanded in the width direction in a band shape. Similarly, a predetermined number of scanning lines in the green light-emitting area 18 are displayed on one line of the green image, and a predetermined number of scanning lines on the blue light-emitting area 19 are displayed on one line of the blue image. to be displayed. Therefore, on the CRTIO, a three-color image for one line of a video image is displayed spread out in a band shape with a light emission width inversely proportional to the spectral sensitivity of the photosensitive material. At this time, if the color balance is adjusted using the color balance correction key 12, the number of light emitted from each scanning line in each light emitting area 17 to 19 will be different from the standard number of light emitted, as shown in FIG. NR, NG, NB- from which the number of light emission for correction is subtracted
The amount of light emitted from each light emitting area is adjusted.

As shown in FIG. 1, the CRT display screen driven in this manner is focused by a lens 21 and a cylindrical lens 22 in a direction perpendicular to the scanning line of the CRTIO, and is formed into a line on the color paper 20. imaged, 3
Colors are simultaneously line exposed.

After line exposure has been performed for an appropriate number of frames, the controller 4 sends a drive signal to the driver 26, and the pull-out roller 2
4, the color paper 20 is transported by one line of exposure. At the same time, the next line of three-color images read from the frame memories 3a to 3C is written into the frame memory 5, and three-color simultaneous line exposure is performed for an appropriate number of frames as described above.

In this way, line exposure is performed sequentially, and when exposure of one frame or a predetermined portion is completed, the cutter 27 is operated to selectively cut off the exposed portion.

The separated short color paper is subjected to photographic processing in the development processing section 28 and then discharged onto a tray (FIG. 13, not shown).

In addition, when using color papers with different spectral sensitivities, the light emission width of each light emitting area 17 to 19 may be adjusted depending on the spectral sensitivity of the color paper, or the overall width within each light emitting area 17 to 19 may be adjusted. You may want to adjust the brightness.

In the above embodiment, each of the light emitting areas 17 to 19 was formed by arranging filter plates 16 divided into three colors on the screen of a black and white CRTIO, but the present invention is not limited to this. A second embodiment of the present invention shown in FIG.
It may be configured as in the embodiment. That is, on the face plate glass 30 of a CRT, red, green, and blue phosphors 31 to 33 are painted in strips of approximately the same width for each color to form a phosphor screen, and these strips of red, green, and blue The light emitting areas 34 to 36 may be arranged in rows using the phosphors 31 to 33. In this case, similarly to the first embodiment, the number of light emitting scanning lines NR, Nc, N of each light emitting area 34 to 36 is
Let s be a quantity inversely proportional to the spectral sensitivity of the photosensitive material. Note that, as the respective color phosphors 31 to 33, various well-known phosphors such as zinc sulfide-based phosphors, rare earth-activated phosphors, etc. are used in consideration of spectral radiation characteristics, afterglow characteristics, and the like.

Further, in the above embodiment, in addition to the video printer that performs line exposure in three colors simultaneously, the CRT color video printer processor is equipped with a development processing section that develops the exposed photosensitive material. Without limitation, a video printer may be used without the development processing section.

Further, in each of the above embodiments, each of the light emitting areas 17 to 19, 34 to 36, which are strip-shaped in a direction perpendicular to the scanning line of the CRT.
Although the light emitting areas are arranged in rows, the present invention is not limited to this, and each light emitting area may be arranged in rows in the scanning line direction.

In this case, image data for one line of the three-color image is enlarged and displayed in the direction in which each filter is arranged in correspondence with these light-emitting areas.

〔Effect of the invention〕

As explained above, according to the present invention, by arranging band-shaped red, green, and blue filters on the display screen of a monochrome CRT, or by replacing the fluorescent screen of the CRT with red, green, and blue phosphors. By coloring the strips in three colors, a red light emitting area, a green light emitting area, and a blue light emitting area are formed. Since the display is enlarged in the width direction of the light-emitting area to a width that is inversely proportional to , an appropriate exposure amount for one line can be obtained in accordance with the spectral sensitivity of the photosensitive material even with simultaneous exposure. Therefore, simultaneous exposure of three colors is possible, and video images can be printed continuously like a banner.

Furthermore, unlike the three-color sequential exposure, it is not necessary to sequentially insert filters into the printing optical path, and a filter switching device and the like can be omitted, resulting in a simpler configuration. Furthermore, a mechanical shutter can also be omitted, simplifying the configuration and enabling high-speed exposure. Furthermore, without using a special flat CRT, the configuration can be simplified by using a black and white CRT or a general CRT painted in three colors.
Colors can be exposed simultaneously.

=15- Also, CR with red, green, and blue phosphors without using a filter
By painting the T display surface in three colors, it is possible to emit the necessary red, green, and blue colors directly using these phosphors, compared to using a filter to obtain the necessary three-color light.
Electronic energy can be used effectively, allowing efficient exposure.

Further, by adjusting the color balance by changing the number of scanning lines emitted in each light emitting area, the configuration can be simplified and the color balance can be easily adjusted appropriately.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram illustrating a CRT color video printer processor embodying the present invention. FIG. 2 is an explanatory diagram showing an example of a filter plate and a CRT display screen in the same embodiment. FIG. 3 is a perspective view showing an example of different coloring of the fluorescent screen of a CRT in another embodiment. FIG. 4 is an explanatory diagram showing an example of the same CRT display screen. 1... Video image input device 2... Image processing circuits 3a to 3C... Frame memory 4... Controller 5... Frame memory 6... Switching circuit 7... D/A converter 8 ...CRT drive circuit 10...CRT 11...Scanning line number setting circuit 12...Color balance correction key 13.14.15...Color filter 16...Filter plate 17.34... Red light emitting area 18.35...Green light emitting area 19.36...Blue light emitting area 20...Color paper (photosensitive material) 21...Lens 22...Cylindrical lens 31...Red phosphor 32 ...green phosphor 33...blue phosphor.

Claims (4)

[Claims] (1) In a CRT color video printer that uses a monochrome CRT to print color images onto a photosensitive material, strip-shaped red, green, and blue filters are used, and these color filters are arranged in rows on the display surface of the monochrome CRT to display the image. Divide the surface into three areas: a red light emitting area, a green light emitting area, and a blue light emitting area, read out one line of image data for each of the three color images, and read out one line of each of these colors for each corresponding light emitting area. The image data for 1 minute is enlarged and displayed in the width direction of the light-emitting area to a width that is inversely proportional to the spectral sensitivity of the photosensitive material, and these strip-shaped areas are imaged in a line on the photosensitive material to perform three-color simultaneous line exposure. A CRT color video printer characterized in that it performs. (2) In a CRT color video printer that uses a CRT to print color images onto a photosensitive material, the phosphor screen of the CRT is painted in strips with red, green, and blue phosphors to create a red light-emitting area on the display surface of the CRT. , a green light emitting area, and a blue light emitting area, read out one line of image data for each of the three color images, and expose one line of image data for each color for each corresponding light emitting area. The light-emitting area is enlarged in the width direction to a width that is inversely proportional to the spectral sensitivity of the material, and these strip-shaped light-emitting areas are imaged in a line shape on the photosensitive material to perform three-color simultaneous line exposure. A CRT color video printer characterized by: (3) The CRT color video printer according to claim 1 or 2, wherein the color balance adjustment is performed by increasing or decreasing the light emission width within each light emission area. (4) A CRT color video printer according to any one of claims 1 to 3, wherein each of the light emitting areas is arranged in a row in a direction perpendicular to a scanning line of the CRT.