JPH01316089A - Crt color video printer - Google Patents

Abstract

PURPOSE:To simultaneously expose three colors by forming red, green and blue light emitting areas on a CRT display surface, enlargeddisplaying the picture data for one line of each color in the width direction of the light emitting area, and making the total addition of the width of the respective light emitting areas inversely proportional to the spectral sensitivity of a sensitive material. CONSTITUTION:In as CRT 10 color video printer to print a color picture on the sensitive material with the use of a black and white CRT 10, plural belt- shaped red, green and blue filters 13, 14 and 15 are respectively used, and the color filters are alternately and continuously provided on the display surface of the CRT 10. Further, a red light emitting area, a green light emitting area and a blue light emitting area are formed, 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 are enlarged-displayed in the width direction at every light emitting area. Further, the belt-shaped areas are image-formed in a line shape on the sensitive material, and the 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 printer, 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.
RT color video printers are 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.

The present invention has been made to solve the above-mentioned 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 for Solving the Problems) In order to achieve the above object, the present invention uses a plurality of band-shaped red, green, and blue filters, and arranges these color filters in alternating rows on the display surface of a black and white CRT. Set up
A plurality of red light emitting areas, green light emitting areas, and blue light emitting areas are formed, one line of image data for each of the three color images of the color image is read out, and one line of each of these colors is read out for each corresponding light emitting area. Image data is enlarged and displayed in the width direction, and these band-shaped areas are imaged in a line shape on a photosensitive material to perform three-color simultaneous line exposure.

Furthermore, the CRT display screen can be divided into a plurality of red light emitting areas, green light emitting areas, and blue light emitting areas by alternately painting the fluorescent screen of the CRT with red, green, and blue phosphors in strips.

In addition, the total width of each light emitting area for each color is
It is preferable to set the width to be inversely proportional to the spectral sensitivity of the photosensitive material, or to make the sum of the emission widths for the same color in each light emitting area to be inversely proportional to the spectral sensitivity of the photosensitive material.

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.

[Effect]

=4- After the color and gradation of the human-generated color image are corrected, one line of image data for each of the three color images of this color image is read out, and the image data for each color is read out for each corresponding light emitting area. One line of image data is displayed enlarged in the width direction. As a result, a three-color image for one line of a video image is divided into a large number of sections on one CRTR 7 screen, and is enlarged and displayed in a band-like manner.

The CRT image is formed into a line on the photosensitive material by an optical system and exposed. This exposure is 3/1947
Since a color image is enlarged and displayed on a CRT according to the spectral sensitivity of the photosensitive material and focused in a line, simultaneous line exposure of three colors is possible from one CRT. In addition, since the three-color images for one line are arranged alternately, for example, red, green, blue, red, green, and blue, the image formed in a line on the photosensitive material is a single-color image with an extremely narrow width. The light is focused alternately, which reduces color shift and improves print quality. After one line of image is recorded, the photosensitive material is conveyed by -6 constant pitches, and the next one line of image is recorded. In this way, three color lines are exposed simultaneously,
Video images 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 the 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 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 of each color to each light emitting area, which will be described later, so that it becomes the same information in the width direction.

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 circuit 11 is connected to the switching circuit 6 . The scanning line number setting circuit 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).
A filter plate 16 is arranged in which a red filter 13, a green filter 14, and a blue filter 15 are arranged in this order, for example, four times. Each of these filters 13 to 15
Widths WR, Wc, WB in the direction perpendicular to the CRT scanning line of
are distributed so as to have an inverse ratio of the spectral sensitivity of the color paper 20. For example, when the spectral sensitivity of the color paper 20 is R:G:B=1:3:8, the width of each filter 13 to 15 is Wet: Wc: Wi.
-87, a ratio of 3:1. These many filters 13 to 15 form a large number of red light emitting areas 17, green light emitting areas 18, and blue light emitting areas 19 on the CRT display surface. 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.

Also, instead of such a filter plate 16, a black and white CRT
Each of the filters 17 to 19 may be layered on the surface of the IO. Note that each of the filters 13 to 15 was formed with a width that is the inverse ratio of the spectral sensitivity of the photosensitive material, but instead of this, each filter of the same width is used and the number of filters installed is the inverse ratio of the spectral sensitivity of the photosensitive material. It can also be placed as

A photosensitive material such as color paper 20 is placed above the CRTIO so as to face both sides thereof, and the image of the CRTIO is formed in a line shape 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 focuses the CRTIO image in a line shape in the scanning line direction. It is for.

−10= In addition, 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. The video image input device 1 inputs the data to the three color frame memories 3a to 3C, and the image processing circuit 2
A video signal of a three-color negative image that has been image-processed is stored. First, when a print key (not shown) is turned on, the controller 4 takes out one line of video signals of the three-color negative image from the frame memories 3a to 3C, and outputs this one line of red video signals to each one. Red light emitting area 17
The green video signal for one line is used as the image data on the scanning line of each green light emitting area 18, and the blue video signal for one line is used as the image data on the scanning line of each blue light emitting area 19. This video signal is written into the frame memory 5 for one line light emission.

Therefore, each light emitting area 17 is stored in this frame memory 5.
.about.19, video signals for one line of each color are written as one frame. 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, each scanning line of each red light emitting area 17 on the screen is set to the same number.
Since it is displayed as a line-shaped image, one line's worth of red image is displayed expanded in the width direction in a band-like manner. Similarly, each scanning line of each green light emitting area 18 is displayed on one line of the green image, and each scanning line of each blue light emitting area 19 is also displayed on one line of the blue image. do. Therefore, on the CRTIO, a three-color image corresponding to one line of a video image is displayed spread out in a band shape with a total emission width that is inversely proportional to the spectral sensitivity of the color paper 20. At this time, if the color balance is adjusted using the color balance correction key 12, the number of light emitting lights per scanning line in each light emitting area 17 to 19 is as follows.
As shown in FIG. 2, the amount of light emitted from each light emitting area is adjusted by subtracting the corrected number of light emitted from the standard number of light emitted.

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 CRT 1.0, and is projected onto a color paper 20 as a line. imaged in the shape of
Three color lines are exposed simultaneously.

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 sternum is completed, the cutter 27 is activated to selectively cut off the exposed portion.

The separated short pieces of color paper are photographically processed in a developing section for two days and then discharged onto a tray (not shown).

In addition, when using color papers with different spectral sensitivities, it is possible to use a filter plate with the width of each light-emitting area 17 to 19 changed depending on the spectral sensitivity of the color paper, or to change the width of each light-emitting area without changing the filter plate. Area 17-19
You can adjust the luminous width within each luminous area 17 to 1.
It is recommended to adjust the overall brightness within 9.

In the above embodiment, each of the light emitting areas 17 to 19 was formed by arranging the filter plate 16 on the screen of a monochrome CRTIO, but the present invention is not limited to this, and as shown in FIG. It may be configured as in the second embodiment of the present invention. That is, a red phosphor 31, a green phosphor 32, and a blue phosphor 33 are placed on the face plate 30 of the CRT.
For example, the phosphors are painted several times in this order to form a phosphor screen colored in a large number of strips, and each light-emitting area is arranged in a row using these strips of red, green, and blue phosphors 31 to 33. You may. In this case, as in the first embodiment, the total width of each light emitting area is determined by the color paper 20.
The width is inversely proportional to the spectral sensitivity of Alternatively, the number of light emitting scanning lines in each light emitting area can be set to the inverse ratio of the spectral sensitivity of the color paper 20, and the width of light emission can be changed according to the spectral sensitivity of the color paper 20.

In addition, each color phosphor 31 to 33 has spectral radiation characteristics,
Various well-known phosphors, such as zinc sulfide-based phosphors and rare earth-activated phosphors, are used in consideration of 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 the above embodiment, the strip-shaped light emitting areas 17 to 19 are arranged in a row in the direction perpendicular to the scanning line of the CRT.
The present invention is not limited to this, and the light emitting areas 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 -15= these light emitting areas.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of red light-emitting areas, green light-emitting areas, and blue light-emitting areas are formed on a CRT display surface, and for each of these light-emitting areas, one line of image of each corresponding color is generated. The data is enlarged in the width direction of the light-emitting area, and the sum of the widths of each light-emitting area or the sum of the light-emitting widths of the same color in each light-emitting area is set to a width that is inversely proportional to the spectral sensitivity of the photosensitive material. Even in exposure, an appropriate amount of exposure for one line can be obtained depending on the spectral sensitivity of the photosensitive material. 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, simultaneous three-color line exposure can be performed with a simple structure using a black-and-white CRT or a general CRT coated in three colors without using a special flat CRT.

Moreover, the light-emitting areas of each color are divided into multiple parts and arranged alternately, so the image formed in a line on the photosensitive material is a collection of monochromatic images with extremely narrow widths condensed alternately. As a result, color shift can be reduced and the finished quality of prints can be improved. In addition, by painting the CRT display screen in multiple bands with red, green, and blue phosphors without using a filter, the necessary red, green, and blue colors can be emitted directly by these phosphors. Compared to the method that uses filters to obtain the necessary three-color light, electronic energy can be used more effectively and more efficient exposure can be performed.

Further, by adjusting the color balance by changing the number of scanning lines emitted in each light emitting area, the color balance of a negative image or the like can be easily adjusted appropriately with a simple configuration.

[Brief explanation of the drawing]

-18= 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. ■...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 I2...Color balance correction key 13.14.15...Color filter 16...Filter plate 17...Red light emission Area 18...Green light emitting area 19...Blue light emitting area 20...Color paper (photosensitive material) 21...Lens 22...Cylindrical lens 31...Red phosphor 32...Green phosphor 33... Blue phosphor.

Claims (5)

[Claims] (1) In a CRT color video printer that uses a monochrome CRT to print color images onto a photosensitive material, multiple strip-shaped red, green, and blue filters are used, and these color filters are arranged in alternating rows on the display surface of the monochrome CRT. to form a plurality of red light-emitting areas, green light-emitting areas, and blue light-emitting areas, and one for each of the three color images of the color image.
The image data for each line is read out, and for each corresponding light-emitting area, one line of image data for each color is enlarged and displayed in the width direction, and these strip-shaped areas are imaged in a line shape on the photosensitive material. A CRT color video printer characterized in that it performs simultaneous line exposure of three colors. (2) In a CRT color video printer that uses a CRT to print color images onto a photosensitive material, the CRT's phosphor screen is painted with red, green, and blue phosphors alternately in strips to create a plurality of CRT display surfaces. red light emitting area,
Divide into a green emitting area and a blue emitting area, read out one line of image data for each of the three color images, and read out one line of image data for each color in the width direction for each corresponding emitting area. A CRT color video printer characterized in that the CRT color video printer enlarges and images these band-shaped light-emitting areas in a line on a photosensitive material to perform three-color simultaneous line exposure. (3) The CR according to claim 1 or 2, wherein the total width of the light emitting areas for each color is a width that is inversely proportional to the spectral sensitivity of the photosensitive material.
T color video printer. (4) The CR according to claim 1 or 2, wherein the sum of the emission widths of the same color in each of the emission areas is a width that is inversely proportional to the spectral sensitivity of the photosensitive material.
T color video printer. (5) A CRT color video printer according to any one of claims 1 to 4, wherein the color balance adjustment is performed by increasing or decreasing the light emission width within each light emission area.