JPS58100818A - Display element - Google Patents

Abstract

PURPOSE:To obtain a display device having high resolution and reliability by adding a means for preventing generation of noise by cooling liquid to a display device which generates microfoam in a liquid layer and utilizes the irregular reflection of light by the foam. CONSTITUTION:In order to prevent the generation of noises when the temp. of liquid rises too high in the liquid layer 32[a liquid layer 2 which is foamed 4 by the heat from the heating part of an absorbing layer 1 which evloves heat by absorbing irradiation rays (IR beams 5)]of a display element 31 provided with said layer 1, said layer 2 and a transparent protecting layer (glass plate, etc.) 3, the liquid in, for example, the element 31, is evaporated in an evaporating chamber 33 by using an evacuating means 35, and is circulated in a circulating path 36 provided with a liquefying chamber 34 and is cooled by providing a suitable heat radiating means or a cooling means 37 of Peltier effect. Thus the observation of sharp pictures is made possible by projecting the light 45a from an observing light source 44 reflected 45b from the element 31 to the foam image generated by an IR beam generator 38.

Description

[Detailed description of the invention] The present invention relates to a novel image display method and display device.

Currently, cathode ray tubes (so-called CRTs) are widely used as terminal displays in various office equipment and measuring instruments, or as displays in televisions and video camera monitors. However, there are still complaints about this CRT, that it does not reach the same level as hard copies using silver halide or electrophotography in terms of image quality, resolution, and display capacity. In addition, attempts have been made to put into practical use a so-called liquid crystal panel that displays Door Tomato 92 pages using C% liquid crystal as an alternative to CRT.
C is also not completely satisfactory in terms of drive performance, reliability, and productivity.

Therefore, an object of the present invention is to solve the problems that could not be solved by the conventional techniques in this technical field.

That is, an object of the present invention is to provide a method for displaying high-resolution, high-quality images, and a novel display device that is excellent in drive performance, productivity, and reliability, and has high-density pixels.

Hereinafter, the present invention will be specifically explained in detail according to illustrated examples.

One of the principles of image formation in the present invention will be outlined with reference to FIGS. 1 to 8.

In the figure, 1 is a radiation absorption layer, 2 is a liquid thin layer, and 3 is a transparent protection plate.
A display element shown in the schematic cross-sectional view) is constructed. At this time, the radiation absorption layer 1 is a colored (preferably black) film that efficiently absorbs radiation, especially infrared rays, and is obtained by forming a film of various inorganic or organic materials that are difficult to melt. It will be done. If the absorbing layer 1 itself lacks a supporting function, it is desirable to add a radiation-transparent supporting plate made of glass or plastic (not shown).

The liquid constituting the thin liquid layer 2 can be roughly classified optically into 1) a translucent liquid, 2) a colored liquid, and 2) a cloudy liquid. The basic composition of this liquid is water or various organic solvents used alone or in combination.

Specific examples of the organic solvent include methyl alcohol, ethyl alcohol, n-7'lopyl alcohol, isoflobil alcohol, n-butyl alcohol, 5
Alkyl alcohols having 1 to 4 carbon atoms such as ec-butyl alcohol, tert-F/L/alcohol, and isophthyl alcohol; amides such as dimethylformamide and dimethylacetamide; amines such as triethanolamine and jetanolamine Ketones or keto alcohols such as acetone and diacetone alcohol; Ethers such as tetrahydrofuran and dioxane; polyalkylene glycols such as polyethylene glycol and polypropylene glycol; ethylene glycol, propylene glycol, phtylene glycol, hexylene glycol 1
alkylene glycols containing 2 to 6 carbon atoms such as diethylene glycol; glycerin; lower polyhydric alcohols such as ethylene glycol methyl ether, diethylene glycol methyl or ethyl ether, and triethylene glycol monomethyl (or ethyl) ether; Examples include alkyl ethers.

In addition, the above-mentioned colored liquid refers to various dyes,
It refers to a colored liquid (including black) obtained by dissolving or dispersing pigments, and a cloudy liquid is a cloudy liquid in which light-diffusing fine particles (...it does not matter whether they are solids or not) are present in the diagonally upward liquid. A white or light-colored liquid obtained by dispersing The thickness of the liquid thin layer 2 explained above is generally such that the amount of transmitted light is approximately half or less of the amount of incident light.
1 μm to 10°0 μfn) is desirable. Furthermore, at this time,
It is not necessary that the amount of transmitted light be reduced over all wavelengths in the visible range. In other words, it may be a reduction in part of wavelength light in the visible range. Further, this decrease in the amount of transmitted light may be caused by either absorption or scattering of light.

By the way, it is necessary to avoid liquid having the same color as the absorbing layer 1. This is because the contrast between the image area and the non-image area may not be maintained, as will become clear from the image forming principle described later.

As the transparent protection plate 3, a light-transmitting (colorless to light-colored) glass, plastic, or resin with as much pressure resistance as possible is used. However, this protective plate 3 may not be used when the display element is arranged horizontally. If the display element of FIG. , the corresponding points on the absorption layer 1 generate heat.

When a portion of the absorbent layer 1 generates heat in this way, the liquid in contact with it is heated by thermal conduction, the temperature of the liquid increases, and eventually it boils, forming vapor bubbles 4 in the thin liquid layer 2. still,
When irradiating the display element with the radiation 5, the radiation 5 can be irradiated in a pattern corresponding to a predetermined image;
Although a laser light source is used to simultaneously irradiate a large number of beams in the form of a dot using the radiation 5, it is also possible to scan the absorption layer 1 with an I beam or an I line beam. However, since it is actually extremely difficult to form vapor bubbles 4 with uniform optical properties over a wide area, the latter method, that is, the method of forming vapor bubbles 4 in a dot shape, is preferable. This can be said to be an advantageous method from a practical point of view.

Further, the direction in which the radiation a5 is irradiated is not limited to the illustrated example. That is, when the transparent protection plate 3 and the liquid thin layer 2 transmit radiation, it is also possible to irradiate the radiation from the left side of the drawing.

In the present invention, the form of the vapor bubbles 4 formed in the thin liquid layer 2 by the application of a heat pulse in an upward direction is that they are generated from the surface of the absorbent layer 1 and then separated from there. It is effective to have a flat shape that grows and increases without any problem and creates a liquid void in the thin liquid layer 2 that reaches the protective plate 3.

In the present invention, when vapor bubbles 4 are formed in the liquid thin layer 2,
In the first embodiment (when using a translucent liquid), the observation eye 6
Display pixels can be identified based on the difference in the amount of light that reaches them.

Light reflection on the surface of bubbles in translucent liquids is originally slight, but if the bubbles are minute, diffraction and the effects of bubble curvature appear, causing a light scattering effect due to the bubbles. becomes large. On the other hand, in a region without bubbles, most of the observation light 7 reaches the observation eye 6 after being reflected or absorbed by some elements of the display element, resulting in the above-mentioned difference in light amount. Incidentally, at this time, the ideal shape of the bubble is hemispherical (it does not matter whether the bubble touches the protective plate or not).
As for its size, it is preferable that the diameter is approximately 4 o 11 m.

In the second mode (when colored liquid is used), the area where the bubbles are formed is colored by the absorption layer 1, and the other areas are colored by the liquid. Display pixels can be identified.

In the third mode (when a cloudy liquid is used), display pixels are identified by the appearance of colored parts (...where bubbles are formed) on a white or light-colored background.

In the above embodiment, the time required for the bubbles 4 to disappear is usually 30 m sec, and it is desirable that the time be as long as possible in order to utilize the afterimage effect.

In addition, although the method for forming the vapor bubbles 4 that become display pixels by radiation heating has been described above, in the present invention, the first method is described.
The absorption layer 1 in the figure is replaced with a heat transfer layer made of a metal (not shown), etc.
It is also possible to modify this so that a heating element (not shown) is brought close to or in contact with this to heat the liquid by conduction. however,
In this case, unless specific measures are taken to regulate the direction of heat transfer, there is a disadvantage that display pixels cannot be clearly defined due to heat diffusion.

As shown in FIG. 7 or 8, the display element configuration for carrying out the first aspect described above is such that the interface of the absorbing layer 1 or the interface of the protective plate 3 in contact with the thin liquid layer 2 is It is preferable to use the diffusion surface DP because it can enhance the discrimination effect between front and display pixels. Further, at this time, the closer the refractive indexes of the material of the protection plate 3 and the liquid are, the more distinguishable the display pixels will be.

In the present invention, in order to further enhance the discrimination effect of display pixels, a white or light color layer is provided between the radiation absorption layer 1 and the liquid thin layer 2.
A light-reflecting or light-diffusing optical film 8 can also be separately interposed. (Fig. 2) Such optical film 8 must be formed of a high melting point metal material or metal compound material that does not melt itself during heat conduction. Also, in the present invention, As shown in FIG. 1, even if the vapor bubbles 4 generated in the liquid thin layer 2 do not reach from the absorbent layer 1 to the protective plate 3 (FIG. 3), for example, the difference in brightness or chroma When a difference or a hue difference appears, a certain effect of identifying display pixels can be obtained. Furthermore, if this is actively utilized, it becomes possible to display halftones.

In the present invention, when the vapor bubbles 4 are generated in the thin liquid layer 2, there is a sudden increase in pressure, so if the thin liquid layer 2 is constructed in a closed system, there is a risk of damage to the display element. strong. Therefore, it is desirable to connect each of the thin liquid layers 2 to an air chamber or an achievator (not shown) to alleviate the increase in pressure in the thin layer 2. Alternatively, as shown in FIG. 4, a pressure absorbing film 9 may be interposed within the display element to absorb the pressure generated in the thin layer 2.

Of course, it is even more effective to use the two methods described above together. The pressure absorbing membrane 9 is made of a translucent elastic material or a highly viscoelastic material, and may also be made of a so-called sponge that contains air bubbles or has ventilation holes.

Further, as a modification of the present invention, the thin liquid layer 2 may be connected to a heating chamber (not shown) and the liquid may be circulated and heated in advance to a temperature close to its boiling point. At this time,
Since the amount of heating and heating time required to form the vapor bubbles 4 can be reduced, it is possible to greatly speed up the formation of the vapor bubbles 4, that is, the display pixels.

For the same purpose, a heating element layer 10 is provided between the radiation absorbing layer 1 and the liquid thin layer 20 (FIG. 5) or between the radiation absorbing layer 1 and the optical film 8 (FIG. 6) of the display element. The thin liquid layer 2 may be uniformly preheated and the temperature raised to near the boiling point of the liquid.

At this time, if the absorption layer 1 or the optical film 8 is a conductor, an insulating layer (not shown) is provided between them and the heating element layer IO.
It is desirable to provide

In the present invention, the heating element layer 10 (FIGS. 5 and 6) is not necessarily limited to a planar surface or a heating element that covers the entire display surface. In other words, this is a linear heating element or grid heating element (both not shown) that corresponds to the scanning line of the radiation beam.
It doesn't matter if it is.

At this time, if the radiation irradiation and the heating by the heating element are synchronized, further energy saving effects can be obtained.

Materials for such heating elements include HfB□ and 8i3N4.
Examples include metal compounds typified by, etc., and alloys such as nichrome.

Furthermore, in the present invention, a display element configuration in which a corrosive component comes into direct contact with the liquid thin layer 2 should be avoided, since this will shorten the life of the element. In other words, in a configuration in which the corrosive component is in contact with the thin liquid layer 2,
Chemical corrosion, electrochemical corrosion, and mechanical corrosion due to cavitation occur, which often results in damage to the device.

Therefore, in such cases, it is desirable to form a corrosion-resistant protective film (not shown) at the interface between the thin liquid layer 2 and the corrosive component. Soshi-C1 The material of this protective film is:
Examples include metal oxides (SIQ, , TlO2, etc.) that are dielectrics, heat-resistant plastics, and gold. In the present invention, of course, the optical film 8 may also serve as this protective film depending on its function.

Next, as an application example, the principle of forming a color image will be explained with reference to FIG.

FIG. 9 is a schematic cross-sectional view of a color display element, and except for the color mosaic filter 11 and the reflective layer 12, the other components are the same as those described in FIGS. 1 to 8. elements can be used.

The specific structure of the color mosaic filter 11 and its manufacturing technology have already been disclosed in Japanese Patent Publication No. 52-13094.
Since it is as explained in detail in Japanese Patent Application Publication No. 52-36019, the detailed explanation will be omitted here.

In the illustrated example, when vapor bubbles 4 are formed in the thin liquid layer 2 in contact with a portion (Y) of the yellow filter, the color is yellow due to the reflected light passing through this filter. Also, when vapor bubbles (not shown) are formed in the thin liquid layer 2 in contact with part (C) of the cyan filter, a cyan coloration is observed due to the reflected light passing through this filter.Similar to O, When vapor bubbles 4 are formed in contact with a portion (M) of the magenta filter, a magenta coloration is observed due to the reflected light passing through this filter.

In this way, on the actual screen, the observer 6 sees pseudo-colors based on the additive coloring method. For example, when vapor bubbles are formed at the same time in adjacent Y, O, and M, the observer 6 will see a white color. Although it is also possible to directly form a -C non-transparent coloring layer (not shown) with a colored organic pigment or inorganic pigment, in either case, the layer must have good thermal conductivity, heat resistance and It is desirable to use a material with excellent impact resistance. Similarly, as in the latter aspect,
When coloring occurs due to surface reflection of the pigment layer, the reflective layer 12
is not necessary.

Such a reflective layer 12 is obtained by a metal thin film processed into a mirror surface.

Here, a schematic structural example of another display element according to the present invention will be shown using FIG. 10.

In the figure, numeral 3 indicates a transparent protection plate, and numeral 2 indicates a thin liquid layer, which are elements having the same functions as those explained in FIG. 1. Reference numeral 13 denotes a thermally conductive insulating layer, and a plurality of heating resistance wires 14 and 15 are two-dimensionally arranged on both sides of the insulating layer so as to intersect with each other, sandwiching the insulating layer between them. Reference numeral 16 denotes a support for the heat generating resistance wires 14 and 15 and the insulating layer 13. This element is designed so that vapor bubbles 4 are formed in the thin liquid layer 2 in the area where they intersect only when the predetermined heating resistance wires 14 and 15 are selected and generate heat. It is.

Next, an example of matrix driving of such display elements will be explained in more detail using FIG.

In the figure, reference numeral 17 indicates a display element, which can be considered to have the same detailed configuration as explained in FIG. 10. Now, in the drawing inside this display element 17, the heating resistance line X in the left and right direction
I! , Xm, Xn, Xo, and Xp (these are called row lines), when heating current pulses are sequentially applied, the liquid thin layers (not shown) corresponding to these resistance lines are sequentially heated linearly. However, at this time, since the degree of heating is set to be below the boiling point of the liquid, no vapor bubbles are generated in the thin liquid layer. On the other hand, in synchronization with the application of heating current pulses, the heating resistance wires Y are arranged vertically in the drawing.
A predetermined video signal is applied to the resistance line Yc, Yd, and Ye (these are called column lines).

The thin liquid layers corresponding to Yd and Yc are linearly heated, but in this case as well, it is necessary to keep the degree of heating below the boiling point of the liquid, so this alone will not cause vapor bubbles to form in the corresponding thin liquid layers. Don't let it happen. However, at the intersection of the row line and the column line where the heating current pulse and the video signal pulse are synchronized, the heating current pulse and the video signal pulse are mutually heated by the heat generated by both lines. If conditions are set so that the corresponding liquid thin layer foams only when heated in a compatible manner, vapor bubbles 18 are formed at the selected row/column intersection.

In the above example, even if the driving method is changed as follows, images can be formed in exactly the same way. That is, even if the device is modified so that a video signal is applied to the row lines and a heating current pulse is applied to the column lines, the effect is exactly the same.

On the other hand, the display element illustrated in FIG. 10 also enables matrix driving. In the case of the matrix drive method, it goes without saying that a radiation absorption layer is not required as an element component, but instead, a heat sink may be provided separately to enhance the heat dissipation effect of the resistance wire. is desirable. This heat sink is provided with a support 16 (the one shown in FIG. 10 can be used instead).
rL, if both signals are applied at the same time due to the time lag in heat conduction, the conductive heat will not reach the liquid thin layer 2 at the same time, which may inhibit foaming. Therefore,
In order to enhance the harmonic heating effect, it may be preferable to delay the applied pulse to the signal line closer to the liquid thin layer 2 than the signal pulse to the other signal lines. Note that it is not necessary that all of both signal lines be formed of heating resistors.

Rather, in order to save energy, only the intersections of row lines and column lines are constructed with heating resistors, and the rest are A.
I! It can be said that it is preferable to construct it with a good conductor such as
However, there is a drawback that the manufacturing process is complicated.

Further, another example of a heating element constituting a display element suitable for matrix driving as shown in FIG. 11 will be explained with reference to FIG. 12.

FIG. 12 is an external perspective view schematically depicting a partial area of the heating element. In the figure, numeral 21 indicates a heating resistor layer, which is made of a known heating resistor (for example, nichrome alloy, Hf
B2. It is obtained by forming a planar film of Si, N, etc.). Although not shown, this resistance layer 21 naturally extends downward in the drawing. Also, 22-1.22-2.22-3
．． 22-4.

are column conductors, 23-1, 23-2.23-
3°23-4, 23-5 are all row conducting wires. All of these conductive wires can be made of good conductors such as gold, copper, and aluminum. In the illustrated heating element, for example, when the column conductor 22-2 and the row conductor 23-3 are selected and a voltage is applied to them, one part of the resistance layer 21 corresponding to the intersection 24 of the two is selected. The part is energized and generates heat.

In this manner, by arbitrarily selecting and energizing the row conducting wires and column conducting wires, it is possible to generate heat at any (row/column) intersection.

Therefore, in a display element as shown in FIG. 10 incorporating the heating element shown in the drawing, it is possible to display a don't matrix image using the same matrix driving method as in the example shown in FIG.

By the way, in the heating element shown in FIG. 12, it is also possible to provide the heating resistor layer 21 divided only at the intersection of the row conducting wire and the column conducting wire (the conducting wires are insulated from each other in other areas). With such a configuration (not shown), it is possible to substantially prevent the occurrence of losstalk, which is an inconvenience in forming an image faithful to the signal. Further, by arranging a heating resistor having diode characteristics at the intersection of the row conductor and the column conductor, it is possible to completely prevent crosstalk.

It should be noted that color display can also be performed in the matrix-driven display method using the heating elements described above by adopting the same configuration as the example shown in FIG. 9. Further, although not shown in the drawings, if the entire display element is configured to be translucent, a so-called transmissive display element can be obtained. However, whether the display element is transmissive or reflective is simply a difference in viewing direction.
The imaging principle itself based on the present invention is not different.

Here, another application example of the present invention will be explained using FIGS. 13 and 14. FIG. 13 is a schematic configuration diagram of the display device, and FIG. 14 is a schematic external perspective view illustrating its optical system.

In the figure, when the display element 31 is continuously driven for a long time, the temperature of the thin liquid layer 32 inside the element 31 gradually rises due to heat accumulation (because the liquid is a thin layer). Steam bubbles may suddenly form inside. If the amount of heat storage increases in this way, it will cause noise, which is not desirable. Therefore, in this illustrated example, in order to prevent heat accumulation in the thin liquid layer 32, the thin layer 3
The liquid in 2 is the display element 31, the vaporization chamber 33, and the liquefaction chamber 340.
It seemed to circulate between the two.

The role of the vaporization chamber 33 is to remove such excess heat as vaporization heat, and to absorb or relieve the pressure caused by the generation of vapor bubbles due to the signal. Furthermore, a pressure reducing means 35 is added to the vaporization chamber 33 in order to maintain it in a predetermined reduced pressure state. If the inside of the liquid thin layer 32 is kept in a low pressure state by the pressure reducing means 35, vapor bubbles are formed at a much lower temperature, so that driving energy can be reduced. Furthermore, since the evaporation rate of the liquid increases, the rate of heat dissipation is also accelerated, which is another effect of the pressure reduction means. The vaporized vapor is then liquefied in the liquefaction chamber 34 by releasing heat outside the system, and is again injected into the liquid thin layer 32 within the display element 31 through the circulation path 36. Therefore, while maintaining the reduced pressure state by the pressure reducing means 35, the thin liquid layer 32 is transferred to the circulation path 3.
6 to the vaporization chamber 33, from the vaporization chamber 33 to the liquefaction chamber 34, and then from the liquefaction chamber 34 back to the liquid thin layer 32. and secondly, it is effective in removing noise caused by pressure.

Furthermore, by providing the display element 31 with a cooling means 37 consisting of a heat dissipation means or a Bertier effect element, the diagonal effect can be enhanced.

In order to apply a thermal signal to the display element 31,
For example, an optical system 38 shown in FIG. 14 is used. In the figure, a laser beam 41 output from a laser oscillator 40 passes through a thin film waveguide deflector 42 and then is reflected by a galvano mirror 43 while scanning the surface of a display element 31 at high speed. The laser oscillator 40 includes an image signal circuit (
(not shown), specific image formation becomes possible. Furthermore, in reality, the display element 31 is intermittently irradiated with a laser beam having a spot diameter of approximately several tens of micrometers.

And the actual image forming mechanism in the display element 31! Since the ism has been explained in detail earlier, its explanation will be omitted here.

In this way, while forming an image on the C1 display element 31 or after completing the image forming, the observation light 4 is emitted from the illumination light source 44.
5a toward the display element 31 and irradiates it.

The reflected light 45b is transmitted to magnifying projection lens systems 46a, 46.
b, and an enlarged screen is projected onto a screen (not shown). (FIG. 13) By the way, the liquid circulation system described in FIG. 13 does not require the intervention of a forced liquid circulation device such as a pump. In other words, a liquid circulation system can be constructed by natural convection of the liquid. Even when adopting the liquid circulation system as described above, at least vapor bubbles (display pixels) are formed in the liquid thin layer. During this period, flowing liquid should be avoided as it may disturb the image.

That is, the timing and speed of circulating the liquid should be synchronized with the so-called one-frame loading period; it is desirable. promotes heat dissipation. It is desirable to provide fins for this purpose.The size of the vapor bubbles assumed in the present invention described above is approximately 10 μm to 1 μm in diameter, especially focusing on resolution.
It is about 00 μm. However, it is of course possible to implement the method outside the above range as long as resolution is not an issue.

Also, the time from when a heat pulse is applied to a liquid until a vapor bubble is formed is called the rise time.The rise time is about 10μ3eC.Conversely, when this vapor bubble disappears or disappears, the rise time is about 10μ3eC. The time during which the signal is applied is called the fall time, and the fall time is as fast as 30 μsec. The rise time and fall time are influenced by the liquid temperature in the thin liquid layer, liquid pressure, pulse application time, heat radiation conditions, etc., and are also easily affected by the viscosity and surface tension of the liquid. cannot be argued. However, from the standpoint of afterimage effects, etc., a very high speed of fall time is not required.

The desired fall time can be easily set by adjusting the composition of the liquid. Generally, the liquid used in the present invention is made from various solvents, dyes, pigments, etc. Dyes include direct dyes, acid dyes, organic solvent dyes, etc., and the melting point is 1.

Alcohol-based, glycol-based, ketone-based, ester-based,
There are hydrocarbons, etc. 1. Particularly suitable are mixtures of ethyl alcohol, methyl alcohol, isopropyl alcohol, ethylene glycol, etel cell solve, and the like. Low boiling point melting temperature 11 is the first in terms of power consumption because bubbles are generated at low temperatures.

In order to keep the bubbles as long as possible, and in particular, to keep the display pixels, it is desirable that the temperature force be resistant to cooling and that the viscosity is suitably high. In addition, especially when it is desired to variably adjust the duration of the bubbles, it is effective to use the above-mentioned pressure reducing means. In other words, the lower the liquid pressure, the lower the temperature at which vapor bubbles are formed. Therefore, the lower the pressure within the liquid layer is made by the variable pressure reducing means, the longer the display will last. The method of reducing the pressure of the liquid is particularly effective when displaying still images or slow-motion videos.

As explained in detail above, the main effects of the present invention are: 1. Since it is possible to arrange each minute vapor bubble in a high density arrangement as a unit of display pixel, a high resolution image can be displayed. .

2. Still images or moving images including slow motion can be easily displayed by adjusting the duration of vapor bubbles as display pixels in the liquid layer.

3. By employing a liquid circulation system in the display element, a noise-free and high-quality screen can be presented.

4° Multi-color display and full-color display can be easily implemented.

5. Since the structure of the display element is relatively simple, its productivity is excellent, and the element has high durability and reliability.

6. Can be adapted to a wide range of drive systems.

There are many things that can be mentioned.

[Brief explanation of drawings]

1 to 10 are schematic cross-sectional views illustrating an example of the configuration of a display element used in the present invention, and FIG. FIG. 12 is a perspective view of the external appearance for explaining one configuration example of the heating element;
The figure is a schematic configuration diagram of a display device as an example of application of the present invention.
FIG. 14 is an external perspective view of an example of the imaging signal input system. In the figure, 1 is a radiation absorption layer, 2 and 32 are liquid thin layers, and 3
is a protection plate, 4 and 18 are steam bubbles, 5 is radiation, 7 and 45
a is an observation light, 8 is an optical film, 9 is a pressure absorption film, 10 is a heating element layer, 11 is a color mosaic filter, 12 is a reflective layer, 13 is an insulating layer, 14, 15°XI, Xm,
Xn, Xo, Xp, Yc, Yd,
Ye is a heating resistance wire, 16 is a support, 17.31 is a display element, 21 is a heating resistance layer, 22-1.22-2.22-3
．． 22-4.23-1.23-2.23-3.23-4
．． 23-5 is a conductor, 33 is a vaporization chamber, 34 is a liquefaction chamber, 35
36 is a pressure reduction means, 36 is a liquid circulation path, 37 is a heat dissipation and cooling means, 38 is an optical system, and 41 is a laser beam. Procedural amendment (voluntary) February 12, 1980 Haruki Shimada, Commissioner of the Japan Patent Office], U> Indication 1 ■ Japanese Patent Application No. 200767 2, Title Indication Element 3 of the Invention, to be amended Relationship with asexuality Patent applicant address 3-3G-2 Shimomaruko, Ota-ku, Tokyo Name (100
)Representative of Canon Co., Ltd. Ryu Kaku 3 Part 4, Agent address: 3-30-25 Shimomaruko, Ota-ku, Tokyo 148, ``Detailed Description of the Invention'' column of the specification to be amended; Drawing (Figure 9). 6. Contents of the amendment l) The portions specified in the table below on pages 14 to 15 of the specification are corrected as follows. 2) Correct Figure 9 as shown in the attached sheet (in red). Import

Claims (1)

[Claims] A display element basically comprising a liquid layer and a heat generating element for generating bubbles in the liquid layer, and further comprising a cooling means.