JPS58153936A - Image processing method - Google Patents

Abstract

PURPOSE:To edit many originals efficiently, by exposing an image, which is formed on a phase transfer type liquid crystal panel with laser light by writing or erasion, to a sensitive material. CONSTITUTION:The liquid crystal panel is provided with a light absorbing layer 2 for enhancing the thermal effect of the laser light, a light-reflective metallic electrode 3, and transparent electrodes 4 and 4'. In respect to an orientation treatment, the vertical treatment is more desirable because of a high response speed. The picture signal taken out from two transparent originals by a scanner is converted to a dot picture signal which has a dot diameter in accordance with the intensity of light. The system where a laser address part is used as a light shielding layer without voltage application and the system where the laser address part is used as a light-transmitting layer while applying a voltage are combined to write or erase the image. Since the whole of the image can be erased by application of a high voltage, the repeated use is possible. The liquid crystal image is photographed on a lith film and is developed to obtain a film negative.

Description

DETAILED DESCRIPTION OF THE INVENTION This paper is an image processing method 4:ls, and more specifically, phase transition W! The image was created by erasing the image using a laser beam on the liquid crystal panel.
The image processing method 6 relates to a photosensitive material 1 such as a silver halide photographic film using an image t, which makes it possible to efficiently edit a large number of manuscripts by exposing it to light.

Conventionally, a method for editing a large number of manuscripts has been to paste positive or negative copies onto pasting paper or film.

Most of the work is done by hand, so it requires a great deal of time and effort. In recent years, methods such as scanners, computers, magnetic or optical disks, etc., as shown in Figure 1, have been developed to overcome the above disadvantages. A method using an ORT storage medium has been developed.This method converts the flat hook signal on wAIII into an electrical signal by, for example, separating the color or density of the document using a scanner. The P chapter is made visible on the CtRT through the image processing computer, and the shape, position, size, color, etc. of the image are confirmed using the computer, and III
L. By editing a large number of originals on the ORT, storing the edited video information on a recording medium such as a magnetic disk, and then reading the video information from the recording medium via a computer and outputting it to a scanner, etc. It exposes the sensitive material.

However, in the above method, the O used for the monitor
The resolution of one side of RT is not sufficient, for example, even with J-Tech 8mm 4th edition, one normal printed image (150-175 lines/1nch
), it is currently impossible to achieve the required volume of 2000 x 1500 x 1500 x 1500 x 1500 x
T is requested. For this reason, when editing using method C2 as described above, only a portion of the image can be monitored, and it takes a long time to record and read out video data from a storage medium such as a disk. It has its drawbacks.

The present invention solves the above-mentioned conventional drawbacks, and
ll] 1) The present invention involves writing or erasing on a phase change type liquid crystal panel using a laser beam to form one side, and then projecting light onto the phase change type liquid crystal panel to obtain reflected light or After the sound light L1L is applied to the sensitive material using transmitted light, post-processing is performed to remove the mold.

Hereinafter ε: The present invention will be explained in detail 1:s2.

First, in the present invention, an image is formed by writing or erasing on a phase change wave crystal panel using a single laser beam. .

The phase transition I11 acid crystal panel is made of two opposing glass plates 1 and 11iIε: as shown in Figure 2, liquid crystal is sealed through the electrodes, and one glass plate side 42 further absorbs light. To explain in more detail, one transparent glass plate 1 is provided with a light absorption layer 2, a metal electrode 3 is provided on the light absorption layer, and the other glass plate 11-2 is provided with a transparent electrode such as In2tJ3. 4 is provided by vapor deposition or the like, and the above two transparent glass plates are arranged so that the metal electrode on one transparent glass plate and the transparent electrode on the other transparent glass plate face each other (and the liquid crystal 5 is placed between them). It is enclosed and the surrounding area is sealed.

2nd figure) 4 = The phase change type liquid crystal panel as shown is coated or erased with a laser beam from one transparent glass plate 1 side, and the other transparent glass plate 1''
It is a reflective type that allows you to see the image fjl from the side.

A transmissive type liquid crystal panel as shown in FIG. A transparent electrode 4 on the light absorption side is provided, and the other glass plate C:
A transparent electrode 4 is provided, two transparent glass plates are arranged so that the transparent electrodes face each other, a liquid crystal 5 is sealed in the threshold, and the surrounding area is sealed. Writing or erasing is performed using a laser beam from one side, and images are viewed from the other transparent glass plate 1'.

In the above, the light absorption layer 2 of the liquid crystal panel absorbs light of the wavelength of the laser light used and generates heat, and is appropriately selected from carbon black, inorganic pigments, dyes, etc., and used.

The transparent glass plate used as the can substrate is preferably one that absorbs little laser light and exposure light, which will be described later, and ordinary soda glass, white plate glass, quartz glass, etc. are used.

Father, as the transparent electrolyte for the phase change type liquid crystal panel in the present invention, the thickness of 150 to 500 mm is 203 mm and 150 mm.
~500 A] 8nO,, jl [Mi 50 to 200 μm, and those provided by C2 such as evaporation, sputtering, and OVD can be used.

Further (2, 1 in Figure 2 (4): The metal electrode shown is provided for the purpose of light reflection, and the thickness of the metal electrode is 300 to 100 mm.
i metal thin knitting is usually used.

In addition, it is preferable to perform a known grating treatment on the surface of the transparent electrode in order to maintain the uniformity of the image. A horizontal alignment treatment using a thin mv of 141I, a vertical alignment treatment using a silane-based Cubpring with or without an aromatic Ilv, and a resin such as polysilochitin are carried out.Among the above, the vertical alignment treatment is preferable in terms of its quick response speed.

In addition, the above liquid crystal panel C: The liquid crystal to be used is preferably a liquid crystal with a laminar pitch of 5μ or less, and when using a liquid crystal with a helical pitch of more than 5P, sufficient contrast cannot be obtained in a normal liquid crystal panel with an electrode spacing of about 5 to 50P. The image on the liquid crystal panel described above is formed by the above-mentioned light scattering state and transparent state. 1; This is caused by the 5j structure and the orientation force electric field or thermal disturbance action. As liquid crystals that meet the above conditions, cholesteric liquid crystals or mixtures, smectic liquid crystals or mixtures of nematic liquid crystals and basic substances, smectic liquid crystals with spirals, etc. can be used. The above conditions for class II-
Specialty 1: @Not specified, but ams such as biphenyl, V-rough, azoxy, and pyridine threads are preferably used in practice. As the above-mentioned optically active substance, a mixture thereof (any substance that does not impair the liquid crystal layer can be used, but a cholesteric compound or a chiral nematic substance having an optically active group in a part of its molecular structure) may be used. It is preferably used because the stability of the mixed yarn is good and the effect of the grating treatment on the electrode surface is evenly distributed.

The operation of the liquid crystal panel as described above has two states: a scattering layer and a transparent state at low voltages, a focal conic scattering state at medium voltages, and a homeotropic transparent layer at high voltages. , the value &: of each voltage region is temperature dependent, and by controlling the thermal effect of radar light and the applied voltage, an image consisting of two regions □, a scattering layer and a transparent layer, can be displayed.

To describe the method of image processing using the above-mentioned liquid crystal panel, we will use a well-known scanner (scanning type Kashiko & device) to prepare an appropriate reflection manuscript and a transmission manuscript, as shown in the block diagram of C in Figure 3. The electrical signals obtained are then enlarged, reduced, modified, etc. using a computer.
By controlling the laser deflector and radar f adjuster using the output signal from the computer while synthesizing and laying act, the address position of the laser beam on the liquid crystal plate surface and the intensity or time of the radar beam can be controlled. The liquid crystal panel is irradiated.

Writing or erasing is performed by irradiating laser light onto the phase change crystal panel as described above. As the radar light, those emitted from gas lasers such as CO, YAG, MUR, H, N, etc., and semiconductor lasers such as Q&As can be used.

Laser light control is similar to the conventional method, in which the video information obtained by quickly scanning the manuscript is collected from a storage medium, and the output signal is used to control a deflector using an electro-optic effect, a galvanometer, etc.
Deflect it using a mirror type deflector or Mira, C,:1... one-rotation type simultaneous device, and perform the cocoon phase transition type liquid crystal panel≦:spreading. When writing by radar,
Laser output: Therefore, one button and two cannot be pressed, but 111
An address of about 14 m to 10 μm per i1JKi (1 dot) is sufficient, and the dot diameter is controlled by a radar application function or the number of pulses = 1. This can be done by changing the laser application time based on the signal. 5 as a dot image
Since it is possible to display elliptical display of 0 dots) / & 1, a small 40 to 50M panel is sufficient for displaying 2000 x 1500 dots in JI8M 4th edition, and the dot diameter can also be changed using the laser address signal. This can be done with a pulse width of . If this image is enlarged with a lens thread, it can be used sufficiently for offset and letterpress printing.

The image on the liquid crystal panel obtained as described above can be turned into a photographic board by using an appropriate method and any equipment such as a plate-making camera or lithographic film. .

According to the present invention as described above, it is possible to monitor a finer image than in OR1, and by photographing the obtained image original on the panel as it is on a lithographic film and developing it, it is possible to easily create a halftone positive or halftone negative. Compared to the conventional halftone scanner I2, the halftone plate can be obtained in a shorter time than the conventional halftone scanner, resulting in a significant improvement in process efficiency.

More specific examples of the present invention are listed below.

The image signal extracted by a scanner from the transmission pattern of the two sheets of Example 2 was converted into a halftone image signal having a dot diameter corresponding to the light intensity. The diameter was controlled by modulation during the pulse. For large diameters, the pulse was wide, and for small diameters, the pulse was narrow. The design was designed to match the growth rate of the liquid crystal dot and the number of Ti lines. . The size of the liquid hatchet glass used was 100x90mm, and the XTO glass of α7aai and the I'rO glass of α5JIJI were each surface treated with a silane-based vertical alignment agent and then placed facing each other at an interval of 11# epoxy. - The periphery was lined with oil, and liquid crystal was injected using a vacuum impregnation method to seal the periphery.

The liquid crystal used was 12 parts of a biphenyl liquid crystal (Chisso@GR-41) with positive 114E transferability (4 = biphenyl-based photogenic substance (Niemerk 0-15)), and a dye (preservative) as a near-infrared absorber. Planelon 1003 (manufactured by Tsuchiya Chemical Co., Ltd.) with L2 added thereto was used. A He-ho laser (2G-W) was used as the laser light source, a rotating mirror type polarizer was used, and the laser diameter was 11 μm on the liquid crystal layer.
I narrowed it down to. For penetration, penetration and erasing were carried out by combining a method in which the voltage was not applied and the 1st day address area was shielded from light, and a method in which the voltage was applied at IOV and the laser address %IA & light was transmitted.

Moreover, since the entire erase can be performed by applying a voltage of 20 V, repeated use is possible. The size of the obtained liquid parrot imitation was fiQasIx13Qax, and it was enlarged 4 times as much as possible on a squirrel-type film, and IIjA imaging was performed to obtain a film master. The original plate obtained had good dot field properties.

[Brief explanation of the drawing]

Figure s1 is a block diagram showing the conventional method, Figure 2 (4) and Figure s1 are schematic Ifrd diagrams of the liquid crystal panel used in the present invention C2.
[Figure i and S electrogram are block diagrams showing the method of the present invention. 1...Glass plate 2...Light absorption 3...Metal electrode 4... ......Transparent polarization 5...
······liquid crystal

Claims (1)

[Claims] Ray on phase change type liquid crystal panel! - writing or erasing using light to form an image, and then the phase transition f;
l! An image processing method in which a photosensitive material is exposed using reflected or transmitted light obtained by projecting light onto a liquid crystal panel, and then a post-processing process is performed.