JPH11142978A - Image printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the print quality of a printed image by a liquid crystal display device. SOLUTION: A color liquid crystal display device 28 is supplied with image data from a personal computer 42, so that an image to be printed is displayed. The color liquid crystal display device 28 is finely vibrated by rotating a motor. When a black shutter 46 is opened and closed in accordance with exposure time in this state, light radiated by a light source 22 is radiated on photographic paper 48 through the color liquid crystal display device 28, an image formation lens 44 and the black shutter 46, so that the image displayed on the color liquid crystal display device 28 is formed on the photographic paper. Then, since the color liquid crystal display device 28 is finely vibrated, the image formed on the photographic paper is also finely vibrated, and a net-like fine line image by the partitioning part of the color liquid crystal display device 28 is blurred, so that the contrast level of a print in appearance is improved when printed photographic paper is developed and the print is prepared, so that saturation is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image printing apparatus, and more particularly to an image printing apparatus for printing an image displayed on a liquid crystal display on photographic paper.

[0002]

2. Description of the Related Art Conventionally, an image printing apparatus using a color liquid crystal display device for producing a color print such as a color print used for a post card has been known. In this image printing apparatus, a negative image or a positive image is displayed on a color liquid crystal display device, light is emitted from a light source, transmitted through the color liquid crystal display device, and the transmitted light is condensed on a photographic paper by a lens. The image displayed on the color liquid crystal display device is formed on a printing paper and printed.

In this color liquid crystal display device, as shown in FIG. 1, RGB three-color filters 12R, 12G, 1G are provided in a liquid crystal cell 10 for each pixel arranged in a matrix.
2B. In addition, partition portions 14 such as wirings are provided between the liquid crystal cells and between the filters.

For this reason, when an image displayed on the color liquid crystal display device is formed on photographic paper, the partition of the color liquid crystal display device is shaded, and a negative image is displayed on the color liquid crystal display device and printed. When making a positive print, the shadows are printed as white net-like thin lines,
There is a problem in that when printed, the density of the high-density portion of the image decreases, and the saturation decreases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an image printing apparatus in which saturation is not reduced even when an image is printed using a liquid crystal display device. I do.

[0006]

To achieve the above object, the present invention provides a liquid crystal display device for displaying an image, and an optical device for reducing an image displayed on the liquid crystal display device to form an image on a photosensitive material. And a vibrating means for microvibrating the image formed on the photosensitive material.

According to the present invention, an image is displayed on a liquid crystal display device such as a color liquid crystal display device or a monochrome liquid crystal display device, and the image displayed on the liquid crystal display device is reduced to a photosensitive material such as photographic paper by an optical system. Image. As a liquid crystal display device,
A transmissive liquid crystal display device can be used. Then, the image formed on the photosensitive material is minutely vibrated by the vibration means.

To microvibrate the image formed on the photosensitive material, at least one of the photosensitive material, the optical system, and the liquid crystal display device may be microvibrated. As described above, by finely vibrating the image formed on the photosensitive material, a net-like fine line image by the partitioning portion is blurred, and the apparent contrast level when printed is increased, thereby improving the saturation. it can.

In the present invention, since the image displayed on the liquid crystal display device is reduced and imaged on the photosensitive material, the image displayed on the liquid crystal display device is compared with the case where the image displayed on the liquid crystal display device is magnified or magnified. , Can print a high-resolution image. In addition, when the image formed on the photosensitive material is minutely vibrated by slightly vibrating the liquid crystal display device, the vibration amplitude of the formed image can be reduced even if the vibration amplitude of the liquid crystal display device is large to some extent. Therefore, it is effective to slightly vibrate the liquid crystal display device.

The amplitude when the liquid crystal display device is slightly vibrated is 1/2 to 1/1 / the size of the liquid crystal cell for displaying one pixel.
A suitable value is about 3, for example, about 30 to 50 μm, and a frequency is about 15 to 18 Hz, preferably about 16.7 Hz. With such a minute vibration, the image is not blurred because the optical system is out of focus.

The direction in which the liquid crystal display device is slightly vibrated may be one of a vertical direction, a horizontal direction along a partition portion extending in the vertical and horizontal directions of the liquid crystal display device, or a direction inclined with respect to the partition portion. The liquid crystal display device may be slightly vibrated so as to make a circular motion.

[0012]

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

As shown in FIGS. 2 and 3, a light source 22 composed of a lamp and a reflector is disposed in a housing 20 of the image printing apparatus according to the present embodiment. On the light irradiation side of the light source 22, an IR cut filter 24 and a dimming filter 26 composed of three filters of CMY are arranged in order.

A color liquid crystal display device 28 composed of a color liquid crystal display panel is arranged on the optical path on the upper surface of the housing 20. The color liquid crystal display device 28 is fixed to the upper surface of the housing 20 by elastic support columns 30 formed of rubber or the like at four corners.

A roller 34 is rotatably supported on the upper surface on the short side of the color liquid crystal display 30 via an L-shaped bracket 32.

A motor 38 is fixed to the upper surface of the housing 20 near the color liquid crystal display device 28 via an L-shaped bracket 36. A disk-shaped eccentric cam 40 is fixed to the output shaft of the motor 38 so as to always contact the roller 34. The eccentric cam 40 has a width of 30 to 50 μ with respect to the center.
It is fixed to the output shaft of the motor 38 at an eccentric position.

Since the eccentric cam 40 is fixed to the output shaft of the motor 38 and the color liquid crystal display device 28 is supported by the elastic support column 30, when the eccentric cam 40 is rotated by the motor, the color liquid crystal The display device 28 is minutely vibrated along the long side direction of the color liquid crystal display device with an amplitude corresponding to the amount of eccentricity of the eccentric cam 40, that is, an amplitude of 30 to 50 μm.

The color liquid crystal display device 28 is connected to a personal computer 42 that supplies digital image data to the color liquid crystal display device and displays an image. In the personal computer 42, prints such as digital image data obtained by reading a color negative film or a color positive film by a scanner in advance, digital image data obtained by combining the digital image data and character data, and digital image data generated by CG are formed. Digital image data is stored.

On the light transmitting side of the color liquid crystal display device 28,
Imaging lens 44, black shutter 46, and photographic paper 4
8 are arranged in order.

The light control filter 26 includes a driver 27
, A motor 38 and a black shutter 4
6 is also connected to the control device 50.

According to the present embodiment, the dimming filter 26
, The light emitted from the light source is adjusted, and the digital image data is supplied from the personal computer 42 to the color liquid crystal display to display an image to be printed.
Further, the color liquid crystal display device is minutely vibrated by rotating the motor 38. When the black shutter 46 is opened and closed according to the exposure time in this state, the light emitted from the light source 22 is applied to the photographic paper 48 via the color liquid crystal display device 28, the imaging lens 44, and the black shutter 46, and An image displayed on the liquid crystal display device is formed on photographic paper. At this time, since the color liquid crystal display device is minutely vibrated, the image formed on the printing paper is also minutely vibrated, and the net-like fine line image by the partitioning portion of the color liquid crystal display device is blurred. Thereby, when a print is created by developing the printed photographic paper, the contrast level of the print is apparently increased, and the saturation is improved.

In the above embodiment, the eccentric cam,
Although the example in which the color liquid crystal display device is minutely vibrated by the vibration device including the rollers and the elastic supporting columns has been described, the color liquid crystal display device may be minutely vibrated by using a piezoelectric element or the like. Further, in the above description, an example in which the color liquid crystal display device is slightly vibrated only in the long side direction has been described. You may make it microvibrate simultaneously or alternately.

[0023]

As described above, according to the present invention, since the image formed on the photosensitive material is minutely vibrated, the print quality can be improved by blurring the net-like fine line image formed by the partition of the liquid crystal display device. The effect of being able to improve is obtained.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a color liquid crystal display device.

FIG. 2 is a schematic diagram of an embodiment of the present invention.

FIG. 3 is a perspective view of the vibration device according to the embodiment of the present invention.

[Explanation of symbols]

 28 color liquid crystal display device 30 support column 34 roller 40 eccentric cam

Claims (1)

[Claims] A liquid crystal display device for displaying an image; an optical system for reducing an image displayed on the liquid crystal display device to form an image on a photosensitive material; and causing the image formed on the photosensitive material to vibrate minutely. An image printing apparatus including: a vibration unit.