JPH07140435A - Color image recording device - Google Patents

Abstract

PURPOSE:To obtain a bright color recording image within a short period of recording time and with a simple constitution by exposing the emitted light colors of at least two adjacent pixels overlappingly on a photosensitive body. CONSTITUTION:When a light is emitted from a backlight light source 2, the display screen of a color liquid crystal display panel 1 is projected toward a photosensitive body 5 and reach a light diffusing plate 6. The pixel parts of the three original colors of this emitted light is diffused and projected on the photosensitive body 5 by the light diffusing plate 6. That is, emitted lights of adjacent pixels are exposed overlappingly on the photosensitive body 5. Thus, an image exposed on the photosensitive body 5 is made bright by overlapping of the three original colors of a light at a specified rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color image recording device.

[0002]

2. Description of the Related Art Conventionally, as a device for obtaining a hard copy from a video signal, for example, Japanese Patent Laid-Open No. 1-1201640 has been proposed.
Japanese Patent Laid-Open No. 4-238058 and Japanese Patent Laid-Open No. 238058.

More specifically, red, blue, and
The filters of the three colors of green are arranged by switching in order, and the image signal of the color corresponding to the color of the selected filter is output to the display screen, and this projected image is photosensitively recorded through the lens. The process of exposing on the medium, red,
A color image was formed by performing three color lights of green and blue on the same photosensitive recording medium.

[0004]

However, since the above-mentioned ones have to be exposed three times to form one image, and also have time to switch the color filter during this time, one image is formed. I was spending a lot of time on it.

Further, since the mechanically movable portion for switching the filter and the filter are used, there is a problem that the structure becomes large.

Further, for example, when printing a moving image,
In order to divide the video signal corresponding to the moving image to be printed into red, blue, and green, a memory for temporarily storing must be provided, which has a disadvantage that the circuit configuration becomes complicated.

In order to solve these problems, if an attempt is made to expose the display of the display screen for color display by additive color mixture of red, blue and green dot matrix pixels as it is onto the photoconductor, only a dark image is obtained. There was a problem.

Hereinafter, this point will be described in detail. For example, in a color liquid crystal panel in which pixels are arranged in a dot matrix, by displaying adjacent pixels in red, blue, and green at the same level, the entire part of this pixel looks white due to the resolution of human eyes. Is well known. Then, on the display screen, this white brightness can be adjusted by controlling the light emission amount of the pixel itself. That is, the brightness of the color could be controlled by controlling the light amount of the backlight.

However, when the pixel itself does not emit light, for example, in the case of a recording material in which pixels emitting red, blue and green are directly recorded on a color film, the brightness of the color can be adjusted by the backlight or the like as described above. Disappear. For example, taking white as an example, each pixel on the recording material has only a predetermined wavelength component of the wavelengths that make up white, so the red, blue, and green pixels make The brightness is lower than that of the white paper on which the image is recorded, that is, the area where the entire surface has red, blue, and green wavelength components from the beginning, and in principle, the brightness is 1/3 or less of the white of the background. That is, you can only get a dark gray image.

An object of the present invention is to obtain a bright color recorded image with a short recording time and a simple structure.

[0011]

DISCLOSURE OF THE INVENTION The present invention relates to a color image display device for performing color display by additive color mixing by causing pixels corresponding to the three primary colors of light to be colored close to each other on the screen, and a color image display device of the color image display device. By providing optical means for image-forming and exposing the display screen on the photoconductor and optical control means for exposing the photoconductor on the gap between at least two adjacent pixels by superimposing the emission colors of the respective pixels, It has achieved the above objectives.

The optical control means is preferably a light diffusing plate provided on the front surface of the photoconductor.

Further, the optical control means is a diffraction grating provided between the color image display device and the photoconductor,
A virtual image of the pixel may be formed in a gap between the pixels formed on the photoconductor.

A color image display device for displaying pixels on the screen according to the three primary colors of light in close proximity to each other for color display by additive color mixing, and a display screen of this color image display device are connected on a photoconductor. The above object is achieved by providing an optical means for imagewise exposure and an optical control means for exposing at least the light emission color of each adjacent pixel on the photoconductor.

It is desirable that the optical control means is a light diffusing plate provided on the front surface of the photoconductor.

Further, the optical control means is preferably the optical means for forming the display image on the photoconductor in a defocused state.

Each pixel corresponding to the three primary colors of light is arranged in a dot matrix in a desired order, and a display screen in which a light-shielding portion is formed between the pixels is provided. Color liquid crystal display panel for performing color display by the additive color mixture, a backlight light source for irradiating light from one surface side of the display screen of the color liquid crystal display panel, and the display screen by irradiating light from the backlight light source. By providing an optical means for image-forming and exposing on the photoconductor and a virtual image forming means for forming a virtual image of the pixel at a position on the photoconductor corresponding to the light-shielding portion, the above object is achieved. There is.

It is desirable that the virtual image forming means is a diffraction grating provided between the color image display device and the photoconductor.

Further, there is provided a display screen in which pixels corresponding to the three primary colors of light are arranged in a dot matrix in a desired order, and a light-shielding portion is formed between the respective pixels. Color liquid crystal display panel for performing color display by the additive color mixture, a backlight light source for irradiating light from one surface side of the display screen of the color liquid crystal display panel, and the display screen by irradiating light from the backlight light source. Is provided between the color liquid crystal display panel and the photoconductor, and an optical means for forming and exposing the image on the photoconductor is formed, and a virtual image of the pixel is formed on the photoconductor at a position corresponding to the light shielding portion. By providing a diffraction grating and an optical control unit that exposes on the photosensitive member by superimposing the emission color of each image formed of at least the adjacent pixels and each of the virtual images,
It has achieved the above objectives.

The optical control means may be the optical means for forming the display image on the photoconductor in a defocused state.

Further, it is desirable that the optical control means is a light diffusing plate provided on the front surface of the photoconductor.

Further, each of the pixels corresponding to the three primary colors of light is arranged in a dot matrix in a desired order, and a display screen in which a light-shielding portion is formed between the pixels is provided. Color liquid crystal display panel for performing color display by additive color mixture, a backlight light source for irradiating light from one side of the display screen of the color liquid crystal display panel, and a diffraction provided between the color liquid crystal panel and the photoconductor. By providing a grating and optical means for image-forming and exposing the display screen transmitted through the diffraction grating on the photoreceptor,
It has achieved the above objectives.

Further, it is desirable that the optical means forms an image of the display screen on the photoconductor in a defocused state.

Further, a light diffusion plate may be provided on the front surface of the photoreceptor.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on an embodiment shown in the drawings.

In FIG. 1, reference numeral 1 denotes a color liquid crystal display panel which constitutes a color image display device. For example, a TFT liquid crystal panel or a ferroelectric liquid crystal panel is used, and each pixel corresponding to the three primary colors of light is formed in a dot matrix form. Further, it has a display screen in which a black matrix is formed as a light-shielding portion between pixels in a desired order, and color display is performed by additive mixing of the three primary colors of this light. FIG. 2 shows the display unit 1a of the color image display device 1. As shown in the drawing, the red (R) pixel 1b and the blue (B) pixel 1 are shown.
c, green (G) pixel 1d and black matrix 1
e is formed in a dot matrix shape. In this example, red, blue, and green color filters are provided for each pixel. Depending on the colors of these filters, red, blue, and
It emits green light. Returning to FIG. 1, a backlight light source 2 illuminates the display screen of the color liquid crystal display panel 1. Reference numeral 3 denotes a lens that constitutes an optical means, and image-wise exposes the display screen of the color liquid crystal display panel 1 projected onto the photoconductor 5 supported by the support base 4 by irradiation of light from the backlight light source 2. In this example, an instant film is used as the photoconductor 5. Reference numeral 6 is a light diffusing plate which constitutes an optical control means. For example, a light diffusing plate formed by spin-coating transparent lacquer on the surface of frosted glass is used.
It is located close to. The distance between the light diffusion plate 6 and the photoconductor 5 is preferably about the distance between the centers of the pixels on the image formation screen formed by the lens 3. Specifically, for example, the size of the display screen of the color liquid crystal display panel 1 is 11 mm in height and 14 mm in width, and the size of each pixel is 40 μm in height.
m is 20 μm and the distance between each pixel is 20 μm.
Using a focal length of 30 mm, the size of the photoconductor 5 is 73 m in the vertical direction.
When the width is 95 mm, the distance between the light diffusion plate 6 and the photoconductor 5 is preferably about 0.1 to 0.2 mm.

Next, the operation will be described.

When a desired color display is being performed on the display screen of the color liquid crystal display panel 1, a light emission signal is input to the backlight source 2 by operating a recording start switch (not shown) or the like. When the light source 2 emits light,
The display screen of the color liquid crystal display panel 1 is projected.

The projection screen is projected by the lens 3 onto the photosensitive member 5.
Direction, and reaches the light diffusion plate 6. In this case, it is assumed that the lens 3 is focused on the photoconductor 5.

The light diffusing plate 6 diffuses the pixel portions of the three primary colors of the colored light, as shown in FIG. 3, and projects them on the photoconductor 5. That is, the light emission colors of the adjacent pixels are overlapped and exposed on the photoconductor 5. Therefore, the light is exposed to the image portion corresponding to the black matrix 1e on the photoconductor 5, and the image exposed on the photoconductor 5 is
It becomes brighter when the three primary colors of light overlap at a predetermined ratio. In FIG. 3, the alternate long and short dash line 3b is the diffused light of the red (R) pixel 1b, the dashed line 3c is the diffused light of the blue (B) pixel 1c, and the alternate long and two short dashes line 3d is the diffused light of the green (G) pixel 1d. 2 are the same as those in FIG.

According to this example, the diffused light of one pixel is
Since each pixel adjacent to the periphery is included, the image recorded on the photoconductor 5 is not extremely blurred, and a high quality and bright recorded image faithful to the original image can be obtained.

In the above example, as the color image display device 1,
For example, when a color liquid crystal display panel with a diagonal of 0.7 inches or 0.55 inches is used, the black matrix occupies a large area on the display screen, which causes a problem that the screen becomes dark. It was
Next, an example of solving this inconvenience will be described with reference to FIG.

In the figure, reference numeral 7 denotes a diffraction grating which constitutes an optical control means and is arranged between the color liquid crystal display panel 1 and the photoconductor 5. In this example, the diffraction grating 7 is installed near the color liquid crystal display panel 1 to reduce the size of the diffraction grating 7 to reduce the cost, but the installation position is not limited to this. . The same numbers as in FIG. 1 are the same.

Next, the operation will be described.

Similar to the above example, the display image of the color liquid crystal display panel 1 is projected by the light emission of the backlight light source 2.

This projection image is transmitted through the diffraction grating 7 so that the pixels 1b through 1b in the projection image are transmitted as shown in FIG.
In the black matrix portion 1e between 1d, the light information of the adjacent pixels, that is, the emission color of the pixel is a virtual image (r, g,
Appears as b). In other words, with respect to one pixel, the virtual image appears in the surrounding black matrix portion.

The display image having this virtual image is projected in the direction of the photoconductor 5 by the lens 3 and reaches the light diffusion plate 6.

The light diffusing plate 6 diffuses the pixel portion and virtual image portion of the three primary colors of the colored light and projects it on the photoconductor 5. That is, the adjacent luminescent colors are overlapped and exposed on the photoconductor 5. This diffusion is preferably about the same as in FIG.

In this case, since the image in which the virtual image is generated in the black matrix portion by the diffraction grating 7 is diffused by the light diffusing plate 6 and image-formed on the photoconductor 5, the projection image is darkened by the black matrix. Since it is possible to solve the problem, it can be made brighter than when only the diffraction grating 7 is used, and the ratio of diffusing the luminescent color of pixels and the like can be made smaller than that in the above example. Can be reduced, so a bright and clear image can be obtained.

Next, an example will be described with reference to FIG. 6 in which image formation exposure is performed on the photoconductor 5 in the defocused state by the lens 3 instead of the light diffusion plate in the example of FIG. In the figure, the same reference numerals as those in FIGS. 1 and 2 are the same.

In this case, the lens 3 is arranged at a position where an image is formed on the photoconductor 5 in a defocused state within the range where the resolution of the projected image does not decrease.

Therefore, by setting the defocused state in the range where the resolution of the projected image does not decrease, the real image and the virtual image of each pixel are diffused and enlarged and overlap each other. Since this is exposed on the photoconductor 5, a bright recorded image can be obtained. Further, since the light diffusing plate 6 is not used, there is an effect that the configuration can be simplified as compared with the above.

As an example of setting the lens 3 in the defocused state within the range in which the resolution of the projected image does not decrease, for example, the size of the display screen of the color liquid crystal display panel 1 is 11 pixels vertically.
mm width 14 mm, each pixel size is 40 μm length 20 width
The lens 3 has a magnification of 6.6 times and a focal length of 30 mm. The size of the photoconductor 5 is 73 mm in height and 95 mm in width.
In the case of mm, it can be achieved by moving the lens 3 in the direction of the color liquid crystal display panel 1 or the direction of the photoconductor 5 by about 1 to 2 mm from the position where the projection image is formed by focusing on the photoconductor 5. The moving distance of the lens 3 can be appropriately changed depending on the lens used, the size of the display screen of the color liquid crystal display panel, and the like.

In each of the above examples, the display image is exposed on the photoconductor 5 by emitting light from the backlight light source 2 when desired. However, the shutter is provided between the color image display section 1 and the photoconductor 5. May be provided, and the photoconductor 5 may be exposed by opening the shutter only for a desired exposure time when the image to be recorded is displayed by constantly illuminating the backlight light source 2.

In this example, an instant film is used as the photoconductor 5, but for example, a 35 m film used for a camera.
It may be a negative film of m, and can be appropriately changed.

Further, the lens 3 may be simply used in the defocused state without using the diffraction grating and the light diffusion plate. That is, the diffraction grating 7 may be removed from the configuration of FIG.

In this case, as shown in FIG. 7, the structure can be simplified without using the light diffusing plate 6, so that the structure can be simplified, and each pixel is diffused and enlarged and projected on the photoconductor 5. The light is exposed between the pixels, and the
It becomes brighter by overlapping the primary colors at a predetermined ratio.

In each of the above examples, the magnifying optical system is used.
The optical system is not limited to this. For example, the display screen of the color image display unit 1 and the photoconductor 5 have the same size, and a contact optical system (for example, flat plate microlens manufactured by Nippon Sheet Glass Co., Ltd. or Ricoh Optical Co., Ltd. ) Microlens array etc.) may be used. When the display screen of the color image display unit 1 is larger than that of the photoconductor 5, the reduction optical system (lens)
You can reduce the size with and use it.

In each of the above examples, a color liquid crystal display panel was used as the color image display device, but a flat C
RT, a plasma display, etc. may be used. In this case, since the CRT or the like always emits light, it is desirable to provide a shutter between the display screen of the CRT and the photoconductor and select the screen to be recorded by opening / closing the shutter.

As image signals, camcorders, VCRs, televisions, laser disks, NES, microscopes, microscope cameras, electronic still cameras, industrial endoscopes, surveillance cameras, various measuring instrument monitors,
An image signal output from an endoscope, an ultrasonic diagnostic machine, a dental intraoral camera, a personal computer or the like can be used.

[0051]

According to the present invention, a memory, which has been conventionally required, is not required, and a moving part such as a color filter and a filter switching mechanism is not required, so that the structure is simple and a color image can be obtained by one exposure. Therefore, it is possible to obtain a bright color image in a shorter time than the conventional one.

Further, at least a gap between two adjacent pixels is exposed on the photoconductor by superimposing the luminescent colors of the respective pixels, thereby exposing the luminescent color superposed between the pixels projected on the photoconductor. Therefore, a bright color image can be obtained.

Further, by providing an optical control means for superposing the luminescent colors of at least adjacent pixels and exposing them on the photoconductor, the three primary colors of the luminescent colors overlap each other at a predetermined ratio, thereby obtaining a desired color. The image recorded on the photoconductor 5 can be bright as if the display screen was directly viewed, and high-quality images faithful to the original screen can be obtained. A recorded image is obtained.

By providing the optical means for forming the image of the display screen of the color image display device on the photoconductor in the defocused state, the optical means also serves as the above-mentioned optical control means, and the structure can be simplified. .

When a color liquid crystal display panel having a display screen in which a light-shielding portion is formed between each pixel is used,
By providing the virtual image forming means for forming the virtual image of the pixel at the position corresponding to the light shielding part on the photoconductor, the light also exists in the part corresponding to the light shielding part, so that the recorded image on the photoconductor becomes bright. it can.

Further, since the luminescent color of the image in which light is present also on the portion corresponding to the light-shielding portion is overlapped and exposed on the photosensitive member, brighter recording can be performed.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is a detailed view of a main part of FIG.

FIG. 3 is an explanatory view showing an exposure image on the photoconductor of FIG. 1.

FIG. 4 is an explanatory view showing another embodiment of the present invention.

5 is an explanatory view showing an image transmitted through the diffraction grating of FIG.

FIG. 6 is an explanatory view showing still another embodiment of the present invention.

FIG. 7 is an explanatory view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Color Image Display Device, Color Liquid Crystal Display Panel 2 Backlight Light Source 3 Optical Means 5 Photoconductor 6 Optical Control Means, Light Diffusing Plate 7 Optical Control Means, Diffraction Grating

Claims (14)

[Claims] 1. A color image display device for displaying pixels on the screen in accordance with the three primary colors of light in close proximity to each other for color display by additive color mixing, and a display screen of the color image display device on a photoconductor. A color image recording apparatus comprising: an optical means for imagewise exposure; and an optical control means for exposing at least a gap between two adjacent pixels on the photoconductor by superimposing the emission colors of the respective pixels. 2. The color image recording apparatus according to claim 1, wherein the optical control means is a light diffusing plate provided on the front surface of the photoconductor. 3. The optical control means according to claim 1, wherein the optical control means is a diffraction grating provided between the color image display device and the photoconductor, and is provided in a gap between pixels formed on the photoconductor. A color image recording apparatus, which forms a virtual image of a pixel. 4. A color image display device for displaying pixels on the screen according to the three primary colors of light in close proximity to each other for color display by additive color mixing, and a display screen of the color image display device on a photoconductor. A color image recording apparatus comprising: an optical unit for imagewise exposure; and an optical control unit for superimposing at least light emission colors of adjacent pixels on the photosensitive member to expose the photosensitive member. 5. The color image recording apparatus according to claim 4, wherein the optical control means is a light diffusing plate provided on the front surface of the photoconductor. 6. The color image recording apparatus according to claim 4, wherein the optical control unit is the optical unit that forms the display image on the photoconductor in a defocused state. 7. A display screen in which pixels corresponding to the three primary colors of light are arranged in a dot matrix in a desired order, and a light-shielding portion is formed between the respective pixels. A color liquid crystal display panel that performs color display by the additive color mixture, a backlight light source that irradiates light from one surface side of the display screen of the color liquid crystal display panel, and a light source that illuminates the display screen. And a virtual image forming unit for forming a virtual image of the pixel at a position corresponding to the light-shielding portion on the photosensitive member. . 8. The color image recording device according to claim 7, wherein the virtual image forming means is a diffraction grating provided between the color image display device and the photoconductor. 9. A display screen in which pixels corresponding to the three primary colors of light are arranged in a dot matrix in a desired order, and a light-shielding portion is formed between the pixels, the three primary colors of light being provided. A color liquid crystal display panel that performs color display by the additive color mixture, a backlight light source that irradiates light from one surface side of the display screen of the color liquid crystal display panel, and a light source that illuminates the display screen. Is provided between the color liquid crystal display panel and the photoconductor for forming an image on the photoconductor by exposing the virtual image of the pixel at a position corresponding to the light shielding portion on the photoconductor. A color image recording apparatus comprising: a diffraction grating; and an optical control unit that exposes on the photosensitive member by superimposing at least adjacent pixels and the respective emission colors of the respective virtual images. . 10. The color image recording apparatus according to claim 9, wherein the optical control unit is the optical unit that forms the display image on the photoconductor in a defocused state. 11. The color image recording apparatus according to claim 9, wherein the optical control means is a light diffusion plate provided on the front surface of the photoconductor. 12. A display screen, in which pixels corresponding to the three primary colors of light are arranged in a dot matrix in a desired order, and a light-shielding portion is formed between the pixels.
A color liquid crystal display panel that performs color display by additive color mixing of primary colors, a backlight light source that irradiates light from one surface side of the display screen of the color liquid crystal display panel, and a color liquid crystal display panel provided between the color liquid crystal panel and the photoconductor. A color image recording apparatus comprising: a diffraction grating; and an optical means for image-forming and exposing the display screen transmitted through the diffraction grating on the photoconductor. 13. The color recording apparatus according to claim 12, wherein the optical means forms an image of the display screen on the photoconductor in a defocused state. 14. A color image recording apparatus according to claim 12, wherein a light diffusing plate is provided on the front surface of the photoconductor.