JPS61281202A - Stationary image display device - Google Patents

Abstract

PURPOSE:To form a device having high weatherability and good color reproducibility by applying an inorg. material to optical filters for various light color and providing a medium contrast control means. CONSTITUTION:Display cells or display stripe cells disposed with the optical fibers consisting of the inorg. material are monochromatic in the respective cells. At least one among red R, green G, yellow Y, cyan C and magenta M or the combination of at least one among the same and white W is used for this single color. A black grid having about several % - 20% width with respect to the cell pitch is attached thereto. The opening rate of the cells is controlled to control transmittance. The control is so executed that the opening rate is successively increased spirally from the center.

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a display device for displaying fixed images, which has increased weather resistance and a longer lifespan compared to conventional devices, and is intended to further expand the color reproduction range. That is.

(Prior Art) Conventionally, many types of photographs and printed matter have been used to display fixed images. These materials that can reproduce halftones and colors use organic materials and have poor weather resistance such as heat resistance, humidity resistance, and radiation resistance (ultraviolet rays). In addition, most of them had a narrow color reproduction range due to color reproduction based on subtractive color mixing.

(Problems to be Solved by the Invention) As mentioned in the prior art section, conventional fixed image display devices have used organic materials for optical filters for colored light, etc., so they have poor heat resistance, humidity resistance, etc. They had poor weather resistance, short lifespan, and poor color reproducibility.

(Means for Solving the Problems) The purpose of the present invention is to apply inorganic materials, which will be described in detail later, to optical filters for each color light, which have conventionally been made of organic materials, and to this end, various improvements have been made to the overall structure. The present invention aims to provide a fixed image display device with high weather resistance and good color reproducibility.

That is, in the fixed image display device of the present invention, each display cell or display stripe cell in which an inorganic material optical filter is disposed has a single color within each cell, and the single color is red (R), green (G).
), blue (B), yellow (Y), cyan (C), magenta (M
) or with at least one of white (
The present invention is characterized in that it uses a combination of the following two methods and includes a halftone control means.

(Example) FIG. 1 is a diagram showing the basic configuration of a fixed image display device of the present invention.

First, the fixed image display device will be explained.

(1) Basic configuration of a fixed image display device The matrix of optical filters for colored light is arranged as shown in Figure 1.
The idea is to control the transmittance (or reflectance) of the microfilter to produce intermediate tones. Here, R, G in the figure,
B are optical filters for red, green, and blue light, respectively.

When the image source is a video signal from a television or the like, that signal is stored in the frame memory. Read out the stored signals at an appropriate speed, create a printing master plate,
Make it more screen. At that time, the signal is sampled according to the color arrangement shown in FIG. 1(a), and the displacement is made to produce shading on the screen. The shading (displacement) is, for example,
It is controlled by the area of the black glass paste as shown in FIG. 1(b). When viewing this fixed image with transmitted light, increase the color density of the filter, and when viewing with a reflective type, decrease the density.
Place a highly reflective diffusing surface on top of the filter.

This diffusing surface may be attached to glass. In addition, on a glass substrate directly or with a diffusion surface attached, as shown in Fig. 1 (b),
) may be printed and fired, and the two sheets may be combined with a filter to display an image. If you replace only the black glass image, you can also see the color image accordingly.

The manufacturing method of the optical filter for colored light is based on the invention of an earlier application already filed by the applicants, JP-A-59-36280, JP-A-59-125016, JP-A-59-125017, and JP-A-59-125017.
No. 9-125018 and the like.

(2) First Embodiment of the Invention In Figure 1, there is no cell that passes 100% of the light, so the border between the cells is not clear, but 100% of the light passes through this cell. Even when the cell pitch is small, a black lattice with a width of several percent to 20% of the cell pitch is provided.

Furthermore, in order to control the transmittance, the aperture ratio of the cell is controlled, and this is increased spirally from the center.

The manufacturing method used in the experiment will be explained in detail below. FIG. 2 shows the entire processing apparatus for producing the film master shown in FIG. 1(b).

The original picture is color film. The original image OF is read by the image input device IP and converted into R, G, B digital signals,
This is stored on the magnetic disk MD. This signal is sampled through a spatial frequency filter by the image processing device IPU,
Performs gradation, color tone correction, etc.

The size of one cell used in the experiment was 1 mm square, and the black grid width was 1 mm.
00 μm. The aperture ratio inside the cell is controlled at 50 μm.
The experiment was carried out by changing the number n of dots at the corners. Since an aperture ratio of 100% is 0.9 mm square, there are a maximum of 324 dots. Therefore, the relationship between the aperture ratio α and the number n of aperture dots is as follows. Since the aperture ratio α is determined according to the signal level as described above, n is determined by this.

The next step was to arrange the dots, but considering the dripping of the black glass paste during printing, we decided to open the dots by n in a spiral shape from the center of the cell, as shown in Figure 3 (a). I took it. The cell color arrangement was as shown in Figure 4. If this is done, the G component becomes strong, so white balance was achieved by making the 100% aperture ratio of the G cell equal to 70% of R and B.

The signal processed in this way is entered into a storage device and from there exposed onto a black and white filter in an image output device IO. A printing screen is created from the film PF thus produced. Using this screen, black glass paste is printed on glass or a filter and fired.

In the example shown in FIG. 3(a), the opening is made starting from the center of the cell, but there are several other opening methods that can be considered. There is a method of taking a plurality of m starting points in a cell. The number of m is about 20 at most. FIG. 3(b) shows an example where m=4.

There is also a method that combines a gray (neutral density) filter and aperture area control. Although it is very difficult to produce all gradations using a gray filter, it is not difficult to combine this with aperture area control. An example is shown in FIG. The gray filter uses only 50% transmission for the left-hand diagonal shaded area. You can either attach that filter to each cell or not. On top of that, add a black mask for area control and a cross hatched area. In the range of 0 to 50%, in principle, a gray filter is attached and 50 to 100% is not displayed, but in the vicinity of 50%, it may be better to place emphasis on image continuity and do not use a gray filter. With this method, the gradation range of the black mask is halved, so the accuracy becomes more relaxed and a thinner cell pitch can be created.

(3) Second Embodiment In the examples shown in FIGS. 3 and 5, only one piece of information, that is, the aperture ratio, is displayed in one cell.

In the example of FIG. 5, the interfering dots should be slightly smaller, but no new signal information has been added. The embodiment shown here is a method in which several sample points are taken within one cell and the aperture ratio thereof is controlled. Let m be the number of sample points in one cell. The case where m=4 will be explained with reference to FIG. 6 as an example.

Apply an appropriate spatial frequency filter to the input signal (',
Sample I) at four points. If the image is flat in that part, the sample values at the four points will match, so the aperture ratios at the four points will be approximately equal, as shown in FIG. When the border is placed on that cell, (b).

Change the aperture ratio of the four points as shown in (c) and (d). Since it is limited by the color filter, the resolution does not increase much, but it does have some effect.

This method is effective when the cell color, which will be described later, is not fixed.

In the embodiments to be described later, the shape is not limited to a rectangle depending on the case.

1st. The shape of the cell in the second embodiment is not limited to a rectangle. Any triangle, hexagon, or anything that can fill the horizontal plane is fine. Further, the aperture ratio may be controlled accordingly.

Furthermore, as a method of controlling the amount of light, a method of controlling the aperture ratio of the cell is shown here. This is because, as a result of experiments, it was optimal at this stage. In principle, there is also a method of directly changing the density, such as with a gray filter.

(4) Third Embodiment In the previous examples, the filter was in the form of a cell, but this shape is similar to that in other display devices such as CRTs (Trinitron and in-line gun CRTs) as shown in Fig. 7. It may be striped as shown.

In this case, the corresponding video signal does not need to be band limited because the spatial frequency extends infinitely in the longitudinal direction of the stripes. The brightness control in this case is shown in Figure 8 (a) and (b).
, Do as in (e). (a) shows the opening taken from one side, (b) shows it taken symmetrically from both sides, (c
) is sampled and made like pulse width modulation.

In addition, various modifications are possible.

(5) Fourth Embodiment Since the cell arrangement shown in FIG. 1 has the same number of R, G, and B cells, it is difficult to maintain white balance with respect to a normal light source, such as a C light source, as well as a normal white light source. is good. However, when considering the cell density as constant, the image resolution is not necessarily the best. Therefore, as shown in FIG. 7, a method in which the number of G's is doubled relative to R and B is used in various display devices.

When the arrangement of FIG. 9 is applied to the basic configuration of the device of the present invention,
Since the total area of the G cells is large, white balance cannot be maintained. Therefore, it is necessary to lower the maximum transmission area of the G cell or to insert a 7-zenta filter in front of the light source, which causes a decrease in the amount of light. Especially in the case of a reflective type, it is necessary to increase the reflectance as much as possible, so I would like to improve it somehow.

FIG. 10(a) is an example of the improvement measure. That is, G
The area of the cell is reduced and the area is transferred to RlB, so that two G cells are equal to one R or B cell.

In the same figure (b), the G cell is made into a square, and the − side a is i.
=0.816.

FIG. 11 shows another example, which is the one shown in FIG. 10(b) tilted by 45 degrees. There is an advantage that the spatial frequency bands of R and B can be widened in the vertical and horizontal directions.

In FIG. 12, the number of cells in R and G is the same, and the number of cells in B is halved, resulting in finer details when expressing human skin. Various modifications of the figures in Figures 10 to 12 are possible, but
Since it can be easily inferred, it will be omitted. Further, since a slight deviation in area does not substantially affect white balance etc., it may be slightly shifted from the center value. It is also necessary to consider the characteristics of the light source and filter when designing.

(6) Fifth Embodiment As a result of experiments, it was found that the reflectance of the reflective type shown in FIG. 1 does not increase much when currently available materials are used, and the screen becomes dark. There is a separate method for brightening the image, such as the fourth embodiment (FIGS. 10 to 12), but it is still insufficient.

In the end, fixing the cell color was a major factor. Therefore, removing this is the basis of this embodiment, but
Furthermore, the color placement and signal processing methods are as follows: ■ The hue should be close to the original signal; ■ The brightness and saturation should be as close to the original signal as possible.

■ Make the interference dots visible and improve the resolution.

The image was constructed with this in mind. Next, examples will be specifically shown.

The cell colors are R, G, B, and white (-), considering the reflective type.
Assume that black (K) is used for brightness control. As principles of color reproduction, it is sufficient to describe primary colors (R, G, B), intermediate colors between primary colors and achromatic colors (white, gray, and black), and methods of expressing intermediate colors between primary colors. In the following explanation, R is taken as the primary color, and yellow (between R and G) is taken as the intermediate color.

FIG. 13 shows the main methods of display colors and cell color arrangement according to this embodiment.

(a) Red (R): This sets all cells to R. dark R
Of course, this is controlled by a black mask (K) (Figure (a)).

(b) Bright red with low saturation: This is mixed with R and W. For intermediate brightness, R and W are placed diagonally to each other.

(Figure (b)).

(c) Yellow: R and G are arranged diagonally to each other.

(Figure (C)).

(d) Yellow with low saturation: (d) Arrange W on the diagonal as shown in the figure, and fill in the rest with R and G. (b) If the saturation is a little high as shown in the figure, the ratio of the number of R, G, and W cells can be set to about 3:3:2. This intermediate processing is performed using a black mask. In principle, any color saturation can be reproduced by changing the ratio of the number of cells, but for this reason, if the repeating pattern of the cell arrangement becomes large, it becomes an interfering pattern and deteriorates the image quality. The exact balance between color reproduction and image quality deterioration is
Although visual evaluation is required, the maximum dimension of the repeating pattern is 1
It is necessary to limit the number to 6 or less.

(E) Orange: Since it is more red than yellow, it is necessary to increase the ratio of red. (f) Make the number of R cells thicker (as shown in the figure), or (g) limit the G with a black mask as shown in the figure.To increase brightness, avoid limiting with a black mask. However, it is necessary to make sure that the repeating pattern does not become too large.For oranges with low saturation, use W and G as shown in (h).
Place diagonally.

(to) Gray: This is all W and limited by a black mask ((i)).

The above method is incorporated into a computer program for image processing. The computer determines the color arrangement of the filters for the entire screen, determines the aperture ratio of the black mask, and creates a total of five film originals using the output device. A screen is made from this original plate, a filter is printed and fired, and a black mask is further printed and fired to complete the display device. When handling white, if you print a solid white color first, you will not need to print a white pattern.

It is clear that the reflectance of the image thus created is 3 times that of the case of FIG. 1 for R and W, and 1.5 times as much for yellow as well.

(7) Sixth embodiment In the above example, R, G, B, and W are treated as filter colors.
K mainly controlled the brightness. This is abbreviated as RGBW-.

(a) RGB-one method This is a method in which R, G, and B are treated as filter colors, and W and K are superimposed on the filter and printed and fired. The arrangement of colors etc. are the same as in the previous example, but (1) W in the cell can be changed as shown in FIG.

(b) In addition to RGBW- and RGBW-, intermediate colors, yellow Y, cyan C, and magenta M are added. The aim is to increase brightness in intermediate colors and improve color reproduction without interfering dots. Printing plates have an increasing number of disadvantages. Regarding the color arrangement, etc., it is sufficient to consider these colors as primary colors and apply FIG. 13.

(c) RGBYCM-What is the law? This is a method that combines the above (b) and (a).

(d) RGB-type method Although there is no particular advantage over RGBW-type method, the process becomes somewhat simpler.

(e) RGBY - Only Y, which has a relatively high normal brightness, is added to the RGB primary colors, and is suitable for an actual subject.

The configuration of the device according to the present invention has been explained above with reference to various embodiments mainly focusing on the color arrangement and shape of cells, the area control of black glass paste, etc., but below, the coloring materials of various filters,
The method of attaching the filter material and the manufacturing method other than screen printing will be described, including the contents of the previous application mentioned above.

(8) Coloring Material As mentioned in the basic structure of the invention, there are two types of this device: a transmission type and a reflection type. A reflective type can be constructed by attaching a black mask to the back of a transmission type filter and then printing and baking white reflective glass, but there are also glass pastes specifically for reflective types.

The main pastes for R, G, 83 colors, intermediate colors, white, and black will be described in order. Of course, materials other than those listed below can also be used.

(8,1) Red (8,1,1) Red using cadmium-based red pigment (for reflective type) Low melting glass powder 70-99% by weight (preferably 80-99% by weight)
5% by weight) and 1 to 30% by weight (preferably 5 to 20% by weight) of a Cd5-CdSe red pigment.

Example: 1200 ml of glass raw material prepared to have the following composition.
After melting at ℃, crush by water cooling.

PbO5i04 BZO3ZnONazOCdOAI
ZO36412115341 (% by weight) This was further ground in a ball mill until the average particle size was 5 μm. 88% by weight of this glass powder and CdS-Cd
A powder mixture consisting of 12% by weight of Se-based red pigment is made into a paste with screen oil (52% by weight of diethylene glycol monobutyl acetate, 4% by weight of terpineol, 7% by weight of ethyl cellulose, and 1% by weight of butyl methacrylate). This paste was screen printed in a predetermined pattern using a 200 mesh stainless steel screen, and the peak temperature was 560°C to 580°C.
Fired in a firing furnace C.

(8,1,2) A low melting glass powder composition containing 0.05 to 2% by weight of gold colloid and 0.1 to 2% by weight of antiion.

(8,13) Red by copper stain (for transmission type) 25% by weight of copper sulfate (pentahydrate), 35% by weight of sodium sulfate
, 20% by weight of zinc sulfate, and 20% by weight of alumina (each powder has been ground to an average particle size of 5 μm or less).

(8,2) Green (8,2,1) Green by chromium oxide green pigment (reflective type) Low melting glass powder 60-98% by weight (preferably 70-98% by weight)
5% by weight), 1 to 25% by weight (preferably 3 to 20% by weight) of a chromium oxide green pigment, and 1 to 15% by weight (preferably 2 to 10%) of a cadmium or antimony yellow pigment.
% by weight).

PbO5iOz BZO:I Al2O3NazO
Low melting glass powder (average particle size 5 μm or less) consisting of Zn0562.8 6 2' 6 2 84% by weight
, chromium oxide green pigment (CrzOi・CoO・A1.
A powder mixture consisting of 12% by weight of a CdS-based yellow pigment and 4% by weight of a CdS-based yellow pigment is made into a base strike with screen oil.

(8,2,2) Green with cobalt oxide/nickel oxide green pigment (reflective type) Low melting glass powder 60-98% by weight (preferably 70-98% by weight)
5% by weight), cobalt oxide/nickel oxide green pigment 1
A composition comprising ~25% by weight (preferably 3-20% by weight) and 1-15% by weight (preferably 2-10% by weight) of a cadmium-based or antimony-based yellow pigment.

Example Low melting glass 82% by weight, green pigment (CaO・NiO・T
A powder mixture consisting of 14% by weight of an antimony-based yellow pigment and 4% by weight of an antimony-based yellow pigment was made into a paste using screen oil.

(8, 2, 3) Green glass paste containing chromic acid (transmission type) A glass material having the following composition is melted, solidified, crushed, and kneaded with screen oil to form a paste.

Silica powder 10.0 parts Lead Red 64.4 parts
Acid 30.2 parts Zinc
Flower 3.0 parts Hydroxide a) Reminium 3.0 parts Potassium carbonate
3.3 parts Potassium dichromate 2.0-6.0 parts Cobalt oxide
0.2 to 3.0 parts (8, 2, 4) Prior application 1984-1
Glass described in No. 25017 (transmission type) CrzOs 0.5 to 0.5 as a colored glass component of the glass powder that becomes transparent by burning onto the applied substrate glass at 700° C. or lower
Using 6% by weight of Co, 00.5-6% by weight of Co, and 00-6% by weight of Cu, a filter is obtained by attaching glass powder containing these to the glass surface of the applied substrate and firing at 450-650°C.

The substrate glass does not have to be flat.

As another example, a blue pigment consisting of CoO and Al2O3 having a spinel structure, 1 to 40% by weight, and a transparent glass powder containing 60 to 99% by weight of a glass powder containing KzCrzOwo, 5 to 6% by weight as a coloring component. Process the item in the same manner as described above.

As yet another example, CoO and Cr, O, and A1□
03 and 80 to 99% by weight of a glass powder containing 0 to 6% by weight of CuO as a coloring component of transparent glass powder is treated in the same manner as described above.

Here, the transparent glass powder material is glass that burns onto the filter application substrate glass at temperatures below 700°C, preferably 6
Any desired glass can be used as long as it is baked at 00° C. or lower and is transparent. For example, the following PbO-5
There is a loz-JO3-ZnO system.

Silica powder 10.0% by weight Red lead 64゜4% by weight Boron
Acid 30゜2% by weight Zinc Flower
3.0% by weight Aluminum hydroxide 3.0% by weight Potassium carbonate 3.3% by weight In addition, PbO-5iO, -8203 series, Pb0-R
ZO3-ZnzO system, BizOi-SiO2-B203
There are lead-free glasses that do not contain PbO or Bi2O3. Moreover, these above-mentioned glasses, RzO (R=Li, Na,
K), BaO, CaO, MgO+NaF+Ti0z,
Zr0z+81203. Glass containing at least one of P2O3 and the like can also be used.

(8,3) Blue (8,3,1) Blue using cobalt oxide blue pigment (reflection type) (transmission type) Low melting glass powder 75 to 98% by weight (preferably 80 to 9%)
5% by weight) and 2-25% by weight of cobalt oxide blue pigment (
(preferably 5 to 20% by weight).

Sue ship-■ PbOSing B2O3^1403 ZnONa
Low melting glass powder (average particle size 5 μm or less) consisting of 20 8
2% by weight and cobalt oxide blue pigment (CoO-A1203
System) A powder mixture consisting of 18% by weight is made into a paste using screen oil.

(8, 3, 2) The one described in the previous application No. 125018/1983 (transmission type) or a blue pigment consisting of Coo and AhOi with a similar structure and having a spinel structure and 10 to 50% by weight and baked on a substrate at 700°C or less. 50-90% by weight of a powder containing 0,000-15% by weight as a colored glass component and an inorganic mixture powder are deposited on the applied substrate glass and heated at 450-650°C.
Obtain a filter by firing it. The transparent glass powder is as described above.

(8,4) Yellow (8,4,1) Yellow by using cadmium yellow pigment (reflective type) Low melting glass powder 70-99% by weight (preferably 80-99% by weight)
5% by weight) and 1 to 30% by weight (preferably 5 to 20% by weight) of a CdS yellow pigment.

Large ship PbO5i (lz tj203 ^1.0.Z
nOCdONa, 05328 8 1'4 3
Low melting glass powder consisting of 3 (average particle size 5 μm or less)
A powder mixture consisting of 90% by weight and 10% by weight of CdS-based yellow pigment is kneaded with screen oil to form a paste. This paste is printed on a substrate in a predetermined pattern using a 200-mesh stainless steel screen,
Fire at 560-580°C.

(8,4,2) Yellow by using antimony-based yellow pigment (reflective type) Low melting glass powder 70-99% by weight (preferably 80-99% by weight)
5% by weight) and an antimony-based yellow pigment (e.g. Pb30a
・5bz03 ・TiO2 type or Cr2O3・5
b203・TiO□ system) 1 to 30% by weight (preferably 5
~20% by weight).

A powder mixture consisting of 85% by weight of low melting glass powder (average particle size 5 μm or less) consisting of PbO5iOzRzO2AlzOzNa20 and 15% by weight of an antimony yellow pigment is kneaded with screen oil to form a paste. Spread this paste onto the board in a predetermined pattern for 20 minutes.
Printed on a 0 mesh stainless steel screen, 56
Bake at 0-580°C.

(8,4゜3) The above (8,4,1) and (8,4,2)
(reflection type) (8, 4, 4) 0.5 to 8 weight of chromate (e.g. potassium dichromate, zinc chromate, lead chromate, strontium chromate, etc.) as a transmission type low melting glass component. Composition containing %.

PbO5iOz B, 03 ZnONa, 0
A glass raw material prepared as 81203fhcrz01 is melted at 1100°C and then crushed by water cooling. It is further pulverized until the average particle size becomes 5 μm or less. This glass powder is kneaded with screen oil to form a paste. Print the paste in a predetermined pattern using a 250-mesh stainless steel screen, and
Bake at ℃.

(8,5) Magenta, magenta with gold colloid (reflection type/transmission type) First, use a glass material with the following weight part composition of 1000 to 125
After melting at a temperature of 0°C, it is solidified and pulverized.

Silica powder 10 parts Lead Red 66.5 parts
Acid 30.2 parts Zinc Flower 4 parts Aluminum hydroxide 3 parts Potassium carbonate 3.3 parts To 100 parts of glass powder having the above composition, add 0.2 to 2 parts of antimony oxide and 0.2 to 2 parts of stannous oxide. In addition, a solution of 0.20 parts of gold dissolved in 99.8 parts of aqua regia was added.
．． After sprinkling 2 to 100 parts on the mixture and drying it, it is melted again and rapidly cooled in water. The glass material subjected to such treatment is heated at a temperature of 600 to 620°C for 2 hours to develop a red color, and the average particle size is 10 μm using a ball mill.
Grind until the following. The glass powder thus obtained is kneaded with screen oil consisting of the following composition to form a paste.

Diethylene glycol motuputyl acetate 8
5 parts terpineol 10 parts ethyl cellulose 4 parts acrylic resin 1 part The weight ratio of the above-mentioned glass powder and screen oil is preferably 2.5 to 5 parts to 1 part.

(8,6) Cyan Currently, no ideal cyan material has been found, but the blue one shown in (2) without any coloring components is relatively close to cyan.

(8,7) Black low melting glass powder 60-96% by weight and black pigment (CoO-
Crz03 HFezO= system or CrzO3CuO
40% by weight (preferably 8% to 30% by weight) of MnO
It may be added up to % by weight.

(8,8) White as described in earlier application No. 144112/1989 (8,8,1)
Example 1 of meat material Glass composition in weight%, PbO: 63. SiO□:1
A glass consisting of 51BzO:+:17+ZnO:5 is melted at 1000'C and ground in a ball mill until the average particle size is 3-5 μm. The obtained glass powder 60 (wt%), rutile titanium oxide 12, alumina powder 28,
All that is required is to attach and sinter a mixed powder consisting of
In the case of printing, it is kneaded with an organic vehicle consisting of butyl calpitol 90, ethyl cellulose 8, and polyvinyl acetate polybutyral copolymer 2 to form a paste, and then printed on a soda lime glass substrate using a 325 mesh stainless steel screen. .

(8, 8, 2) Meat material Example 2 The glass composition was the same as in Example 1, and a mixed powder was obtained with 80% glass powder and 20% rutile titanium oxide.

Example 1 is suitable for thick application, and Example 2 is suitable for back surface.

As an attachment method other than printing, there is a (photo)adhesion method and the like.

(8,8,3) Example 3 of white material Glass composition in weight%, Pb077, SiO□2゜Bz
Oi 10. Zn07. Naz03. AIto:+
Glass consisting of 1 is melted at 1000℃, and the average particle size is
Grind in a ball mill until ~5 μm. The obtained mixed powder consisting of 30% by weight of glass powder and 70% by weight of zinc sulfide is kneaded with the same organic vehicle as in Example 1 to form a paste, and printed on a soda lime glass substrate using a 325 mesh screen. .

"Sako 117 Lambda Koji" ■ Nigarasu composition is in weight%, Bi 20374 + BzOi
9.

Zn0 8. Sing 6. AlzOi 2
．． Glass consisting of Na02 is melted at 1000℃,
Grind with a ball mill until the average particle size is 3 to 5 μm.

A mixed powder consisting of 82% by weight of the obtained glass powder, 8% by weight of anatase titanium oxide, and 10% by weight of zinc oxide,
was kneaded with the same organic vehicle as in Example 1 to form a paste, and printed on a soda lime glass substrate using a 325 mesh screen.

(9) Method of attaching filter material When using screen printing, the colored glass powder material is made into a paste using the following screen oil or the like.

Example of screen oil (diethylene glycol motuputyl acetate)
85 parts by weight Terpineol 10 parts by weight Ethyl cellulose 4 parts by weight Acrylic resin 1 part by weight The weight ratio of the above-mentioned glass powder and screen oil is preferably 2.5 to b. □ Screen printing depends on the precision of the pattern.
It will be performed on a 400 mesh screen. Also, black grids etc. may be printed at the same time and fired at the same time.

Photoetching is carried out as follows. The various transparent glass pastes described above are uniformly applied onto the applied glass substrate and dried at a temperature of about 150°C, or
After half-baking at a temperature of about 0°C, a positive or negative photoresist for normal oxide film removal is applied, a photomask is applied to the areas to be removed by etching or areas to be left, and exposed, and after development processing. Etch unnecessary parts with a hydrofluoric acid solution and wash away.

It is also possible to mix a photosensitive photoresist with the powder of the glass material constituting the transparent glass paste described above, apply it to the base glass, dry it, and then perform etching with a resist developer.

As materials for the photosensitive photoresist used in the above-mentioned etching method, in addition to polyvinyl alcohol and ammonium dichromate, which are used in the production of conventional color cathode ray tubes, various photoresists commonly used in the production of semiconductor devices are used. be able to.

When applied and exposed to light, some agents become selectively tacky depending on the pattern, as is already used when applying phosphors.

By applying the filter glass powder thereon, a pattern can be formed. Thereafter, a filter is obtained by fixing according to the method, removing impurities, and firing.

(10) Manufacturing method other than screen printing The fixed image display device according to the present invention is in high demand for non-mass production. Even in small-scale production, if everything is done by screen printing or photo-etching, making masks and screens becomes expensive. The method shown here is a method in which a pattern is drawn directly on a glass plate.

At present, the conventional method using ink draws sufficiently fine lines using a commercially available profilter. By applying this, it is possible to draw a highly viscous paste from a dispenser over time. All patterns are placed in the memory of the control calculator and drawn accordingly.

The black mask pattern is drawn according to the color arrangement of the image, even if the color arrangement of the filter is not fixed.

The black mask portion may be deposited by vapor deposition, especially if it is added in the final step. Various metals can be used as the material.

For example, a Ni-Cr alloy may be used. When projecting strong light from the back, it is better to reflect the light from different materials to avoid unnecessary temperature rise.

Another method is to deposit a metal on the entire surface of the glass, which can reduce the transmittance of light in the same way as a black mask. A laser output device that can output enough light intensity to melt the vapor-deposited metal, has an aperture mechanism that can change the beam width as required, and has a control function that allows the laser irradiation position to be changed according to the pattern. Prepare the equipment.

Next, narrow down the beam width of the laser to a beam with the required resolution, scan the glass plate sequentially, and increase the light intensity to only the necessary cell pattern openings. After scanning the entire surface,
A method of creating a final pattern image (FIG. 15(a)) is used.

There is also a method of creating a pattern image by changing the aperture diameter according to the required opening area of the cell pattern and creating one filter cell pattern for each irradiation (see Fig. 15).
b) Take).

Interference film filters can also be used for this type of thing if they are selectively deposited in the final step. Color purity will increase if used in conjunction with a glass filter.

The manufacturing method and its cross section are shown in FIG.

The product is manufactured by repeating printing, drying, and baking, starting from the side closest to the glass substrate. Although the configuration of some of these can be reversed, it is necessary to choose materials so that the firing temperature will be lower in the latter case. Various manufacturing methods and their cross sections shown in FIG. 16 are drawings that can be applied to the entirety of the present invention.

(11) Light source Finally, various types of light sources are used for the fixed image display device of the present invention, and these are listed below.
Sunlight, incandescent bulbs, various discharge lamps, three primary color fluorescent lamps, CR
T (cathode ray tube) raster, three light sources of three primary colors mixed with a diffuser plate, etc.

(Effects of the Invention) As mentioned in the section (Means for Solving Problems), the fixed image display device of the present invention applies inorganic materials to the optical filters for each color light, which have traditionally been made of organic materials, and further Since various improvements have been made to the overall structure, a device with high weather resistance and good color reproducibility is provided.

In particular, in this invention, where the area control means for each cell opening is used as the halftone control means, color mixing does not occur even if some misalignment occurs due to the printing of the fixed image display device to which it is applied, and the openings start from the center of the cell. Color mixing is particularly likely to occur in areas with low brightness in objects, but the advantage is that the cell pitch can be made smaller or the image area can be made larger.

The above-mentioned advantages also occur when a gray filter is used in combination with aperture area control.

Further, in an apparatus that adopts the method of achieving white balance as shown in the fourth embodiment, it is possible to maintain its own balance without reducing the resolution of the fixed image display apparatus.

Furthermore, as shown in the fifth embodiment, by adding color with a color light filter, the transmission or reflectance of a fixed image display device that reproduces colors can be increased by 1.5 to 3 times, thereby eliminating color distortion and dot interference. It can be held relatively small. Also Y, C,
Even with an intermediate color of M, the amount of light can be tripled.

The device of the present invention can be applied not only to flat glass but also to non-flat objects. Because it is heat resistant, it can also be used for things like rotating lanterns.

Tableware and other items can also be used if they are treated to prevent lead from leaching.

When projecting onto a super large screen using film, the heat from the light source is applied to the film, causing it to become deformed and discolored. Instead, with this device, this drawback is eliminated.

[Brief explanation of the drawing]

Figure 1 shows a color layout diagram (a) and a pattern of black glass paste (b) for explaining the basic configuration of the device of the present invention, and Figure 2 shows the signal sampling, gradation, and gradation related to the device of the present invention. A block diagram of the entire system of the processing device that performs color correction, aperture ratio processing, etc. is shown, and FIGS. 3(a) and 3(b) show an example of controlling the amount of light by changing the aperture ratio and numerical aperture, respectively. The figure shows another example of cell color arrangement, Figure 5 shows an example of light amount control that combines a gray filter and aperture ratio control, and Figure 6 shows four sample points in one cell of the embodiment of the tube 2 of the present invention. Fig. 7 shows the control of the aperture ratio when the cylinder 3 of the present invention is used.
FIG. 8 shows a brightness control method for the same color filter, FIG. 9 shows an example of the arrangement of the same colors as in FIG.
The figure shows an example of the color arrangement of the embodiment of the cylinder 4 of the present invention, Fig. 13 shows the relationship between display colors and color arrangement example of the embodiment of the cylinder 5 of the invention, and Fig. 14 shows the example of the cylinder 6 of the invention. Figure 15 shows how to arrange W (white) and K (black) in the cell of the present invention, and Figure 15 shows a method using a laser beam in a pattern production method other than the screen printing of the present invention, (a) shows an open pattern, ( b) shows the aperture control of the laser beam, Fig. 16 shows various manufacturing methods of the device of the present invention and its cross section,
(a) and (b) are transmission type 1), (21,
(c). (d) and (e) are reflective types (1) and (21), respectively.
, (3) is shown. R...Red G...Green B...Blue OF...Color original IP...Image input device MD...Magnetic disk, TPU...Image processing device IO...Image output device pp ...Film original plate Figure 1 (a) (b) R; Red e Day: tp Figure 2 Figure 3 (a) f Engineering -1l Par 324 324 324 324 (b) p en=2 4 f
7 323 Figure 4 Figure 5 Figure 6 (a) (b) (C) (d) Figure 7 (a> (b) (C) (d) (6) Figure 8 (C) ■lI] ■ To +lcn 10 Figure 13 (a) (b) (C) (d) (e) (f) (g) (h) (i) Figure 14 RWK Saturation 0 IF? Gray Figure 15

Claims (1)

[Claims] 1. Each display cell or display stripe cell in which inorganic material optical filters are arranged has a single color, and the single color is red (R), green (G), blue (B), It is characterized by using at least one of yellow (Y), cyan (C), and magenta (M) or a combination of the at least one and white (W), and further comprising a halftone control means. Fixed image display device. 2. The fixed image display device according to claim 1, wherein the halftone control means includes area control means for each cell opening. 3. A fixed image display device according to claim 1, wherein the halftone control means includes a grayscale control means for each cell. 4. The fixed image display device according to any one of claims 1 to 3, wherein the color arrangement of the colored light of the inorganic material optical filter disposed in each of the display cells or display striped cells is fixed. A fixed image display device characterized by: 5. In the fixed image display device according to any one of claims 1 to 4, R, G, and B are used as monochrome colors in each cell.
When one of three colors is used and the total number of cells of each color constituting the display device is n_R, n_G, and n_B, n_G≧n_R>n
_B, a fixed image display device characterized in that the visual resolution of the display device is increased, and the aperture area of each color cell is made approximately inversely proportional to the total number of each color cell, thereby achieving white balance of the display device. 6. In the fixed image display device according to any one of claims 1 to 3, the monochrome color includes the R, G, B, Y
, C, M, and W in combination, and the color arrangement of the colored light of the optical filter is made non-fixed.