JP2003121769A - Flat type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat type display device which is inexpensive and has small power consumption and can obtain a large-screen image of high definition. SOLUTION: The display device 10 has a plurality of directional light sources 12, two substrates which are a common electrode substrate 13 and an opposite substrate 16, micromirrors 18, and transparent electrodes 20. Light beams from the light sources 12 are guided to the part between the two substrates in parallel and have their directions changed by about 90 deg. by the micromirrors 18 which are electrostatically controlled with a voltage applied to the part between the common electrode substrate 14 and transparent electrodes 20 to change its posture, so that they are transmitted through the opposite substrate 16. The voltage is applied by a driving circuit connected to the light sources 12 and transparent electrodes 20 to display an image by simple matrix driving.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device.

[0002]

2. Description of the Related Art Flat panel display devices include cathode ray tube (CRT) displays, liquid crystal displays, light emitting diode displays and the like.

In a cathode ray tube display, a phosphor coated on a portion corresponding to a screen of the cathode ray tube receives an electron beam emitted from an electron gun arranged at the rear side and emits light to be visually recognized as a light emitting point. The traveling direction of the electron beam is changed by the polarized magnetic field generated by the polarizing coil,
As a result, the light emitting point is sequentially moved in the horizontal and vertical directions to obtain a plane image.

The CRT display has advantages such as high brightness and high definition images.

The liquid crystal display utilizes the characteristic that the liquid crystal arranged between two transparent electrodes changes its arrangement depending on the voltage state, and controls the transmission of light from the backlight provided on the back surface, thereby The light on the screen provided on the screen is visually recognized. In this case, a planar image can be obtained by separately applying voltages to the electrodes arranged in a matrix and driving the matrix.

The liquid crystal display has an advantage that an image having a completely flat structure can be obtained with low power consumption.

A light emitting diode display utilizes the characteristic that light emission occurs when a current is applied to a pn junction of a compound semiconductor in a forward direction. Referring to FIG. 1 schematically showing a light emitting diode display, a plurality of light emitting diodes 1 are arranged in a matrix. Then, the light emission of each light emitting diode 1 is individually controlled by the control circuit 2 arranged below the light emitting diode 1 and connected to each light emitting diode 1 in a matrix, and matrix driving is performed.
Obtain a plane image. In this case, it is possible to fabricate a large-sized screen having a side of several meters by configuring the plurality of light emitting diodes 1 in the module 3 and connecting and arranging the plurality of modules 3.

Light emitting diode displays have the advantage of operating at low voltage and relatively low power consumption.

[0009]

However, each of these flat panel display devices has the following drawbacks.

The cathode ray tube display has a large weight (mass) and a large volume of the device, has a limit in increasing the screen size, and consumes a large amount of power.

In order to obtain a large screen, a liquid crystal display requires the use of expensive liquid crystal, and the control circuit becomes complicated. Therefore, it is difficult to put a large screen of several tens of inches or more into practical use. .

Since the light emitting diode display cannot structurally arrange fine pixels, it cannot display a high-definition image. Further, since many light emitting diodes are used, there is a limit to the demand for further reduction of power consumption.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a flat-panel display device having a novel structure which is inexpensive and consumes less power.

Another object of the present invention is to provide a flat display device capable of obtaining a high-definition and large-screen image.

[0015]

A flat panel display device according to the present invention has a plurality of light sources arranged in a row and emitting light in a one-dimensional direction, and a row of the plurality of light sources is in contact with one side at a predetermined distance. Common electrode substrate and a counter substrate arranged opposite to each other, a plurality of micromirrors arranged in a matrix between the two substrates, and the common electrode substrate of the counter substrate While having a plurality of strip-shaped transparent electrodes arranged in parallel to the rows of the plurality of light sources on the surface facing to the plurality of micromirrors, each light from the plurality of light sources is
The parallel light is radiated between the two substrates, and the radiated light is
The micro mirror, which is electrostatically controlled by the voltage applied between the common electrode substrate and the transparent electrode to change its posture, changes the traveling direction by approximately 90 °, and the counter substrate is moved through the transparent electrode. It is characterized in that it is configured to be transparent and is configured to display an image by simple matrix drive by applying a voltage by a drive circuit connected to each of the plurality of light sources and the plurality of transparent electrodes.

Here, the predetermined distance at which the two substrates are separated is not particularly limited as long as the micromirrors change their postures to achieve the desired effect, and an appropriate value is set in consideration of various conditions. can do. In addition, the control of the attitude of the micro mirror is realized by adjusting the applied voltage based on the relationship between the attitude of the micro mirror and the applied voltage, which is obtained in advance. In addition, for example, in simple matrix driving, a plurality of light sources function as signals, and a plurality of columns of transparent electrodes function as scanning.

According to the above configuration of the present invention, since the light sources arranged in a line are used without using a large number of light sources arranged in a matrix, it is possible to obtain an inexpensive flat display device with low power consumption. Further, it is possible to obtain a flat-panel display device having a larger screen than a liquid crystal display and a higher definition image than a light emitting diode display.

Further, the flat-panel display device according to the present invention is arranged in a row, and has a plurality of light sources that emit light in a one-dimensional direction, and one row is in contact with the rows of the plurality of light sources, and they face each other with a predetermined distance therebetween. Disposed between the two light sources, and two substrates each including a strip-shaped electrode substrate having a plurality of strip electrodes arranged in a direction orthogonal to the row of the plurality of light sources and a counter substrate, and the two substrates. Liquid crystals and strip-shaped transparent electrodes arranged in parallel on the surface of the counter substrate facing the strip-shaped electrode substrate are arranged in parallel with the rows of the plurality of light sources. Two
The parallel light is radiated between the substrates, and the radiated light is controlled by the liquid crystal whose electric field is controlled by the voltage applied between the strip electrode substrate and the transparent electrode to change the orientation.
A simple matrix in which the direction of travel is changed by 0 ° and the counter substrate is transmitted through the transparent electrode, and a voltage is applied by a driving circuit connected to each of the plurality of electrodes and the plurality of transparent electrodes. It is characterized in that it is configured to display an image by driving.

According to the above-mentioned structure of the present invention, the same effect as that of the above-mentioned invention can be obtained. In particular, a flat-panel display device having a large screen with a simple structure using a liquid crystal which is cheaper than a liquid crystal display is used. Obtainable.

Further, the flat-panel display device according to the present invention is arranged in a row and has a plurality of light sources that emit light in a one-dimensional direction, and the rows of the plurality of light sources have one side in contact with each other and face each other with a predetermined distance. Arranged in a matrix, and two substrates composed of a matrix-shaped electrode substrate having a plurality of electrodes arranged in a matrix and a counter substrate, and a plurality of electrodes arranged corresponding to the plurality of electrodes between the two substrates. And a transparent common electrode disposed on the surface of the counter substrate facing the matrix electrode substrate so as to face the plurality of micro mirrors. , The light is radiated in parallel between the two substrates, and the radiated light is electrostatically controlled by a voltage applied between the matrix electrode substrate and the transparent common electrode to change its posture. The direction of travel is changed by about 90 ° by a micro mirror, and the pair of electrodes is passed through the transparent electrode. If the display circuit is configured to pass through the substrate and a voltage is applied by a drive circuit connected to each of the plurality of electrodes to display an image by active matrix driving, a better response speed can be obtained. This is preferable because a larger display capacity can be realized.

Further, the flat-panel display device according to the present invention is arranged in a row and has a plurality of light sources that emit light in a one-dimensional direction, and one row is in contact with the rows of the plurality of light sources and is opposed to each other with a predetermined distance therebetween. Two substrates, each of which is composed of a matrix-shaped electrode substrate having a plurality of electrodes arranged in a matrix and a counter substrate, a liquid crystal disposed between the two substrates, and a counter substrate of the counter substrate. The matrix-shaped electrode substrate has a transparent common electrode disposed on the surface facing the liquid crystal and facing the liquid crystal, and the respective lights from the plurality of light sources are irradiated in parallel between the two substrates. , The transparent common electrode is changed in its advancing direction by about 90 ° by the liquid crystal whose orientation is changed by electric field control by a voltage applied between the matrix electrode substrate and the transparent common electrode. Configured to pass through the counter substrate via
When a voltage is applied by a drive circuit connected to each of the plurality of electrodes to display an image by active matrix drive, a better response speed can be obtained and a larger display capacity can be realized. Therefore, it is preferable.

Further, in the flat panel display device according to the present invention, it is preferable that the light source is a visible light emitting diode or a visible laser because an existing product having good directivity characteristics can be easily obtained and used. is there.

In the flat panel display device according to the present invention, the light source is an ultraviolet light emitting diode or an ultraviolet laser, and a phosphor is provided on the surface of the transparent electrode or the transparent common electrode opposite to the counter substrate. When arranged, the display color can be easily adjusted using the existing phosphor excited by ultraviolet rays, which is preferable.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment (hereinafter, referred to as an example of this embodiment) of a flat panel display device (hereinafter referred to as a display device) according to the present invention will be described below with reference to the drawings. Explained.

First, a display device according to the first example of the present embodiment will be described with reference to FIGS. 3 and 4.

Display device 1 according to the first example of the present embodiment
0 is a light source 12, a common electrode substrate 14, and a counter substrate 16
The micro mirror 18, the transparent electrode 20, the light source control circuit device (driving circuit) 22, and the transparent electrode driving circuit device (driving circuit) 24.

The light source 12 is a light emitting diode 12a which emits visible light. As the light emitting diode 12a, for example, a commercially available light emitting diode provided so that the light emitting direction has directivity by a built-in lens, that is, provided so as to emit light in a one-dimensional direction is used. Further, instead of this, a laser that emits visible laser light having an inherent directivity may be used. In addition to these, other light sources whose emission direction is regulated so as to have directivity may be used. For example, 32 light emitting diodes 12a are arranged in a line on one side of the common electrode substrate 14 and the opposite substrate 16 which are arranged to face each other. Then, these 32 light emitting diodes 12a are configured to project respective lights in parallel to the space between the common electrode substrate 14 and the counter substrate 16 and illuminate each row of the micro mirrors 18 described later. .

In the common electrode substrate 14, a common electrode 14b made of a solid electrode made of, for example, aluminum is formed corresponding to the entire display surface on a substrate base 14a made of, for example, a glass material.

The counter substrate 16 is formed of, for example, a glass material, and is arranged in parallel with the common electrode substrate 14 with a distance L of about 3 mm from the common electrode substrate 14 by an appropriate spacer not shown. At this time, the space also formed between the counter substrate 16 and the common electrode substrate 14 is made airtight by the spacer also serving as a housing, or by a housing provided as a separate body, and further an inert gas or the like is sealed therein. This prevents moisture from entering the space.
As a result, the action of static electricity described later is effectively realized.

The micro mirror 18 is, for example, a flaky aluminum material. One side of the micromirror 18 is fixed to the common electrode 14b of the common electrode substrate 14, and the one side can be used as a fixed end to change its posture up and down in FIG. Such a minute mirror 18 has 32 × 3 on the common electrode substrate 14 with its fixed side facing the light source 12 side.
Two are arranged in a matrix. One micro mirror 18 corresponds to one pixel.

Here, a method for providing the minute mirror 18 on the common electrode substrate 14 will be described with reference to FIG.

The common electrode substrate 14 is prepared and the resist is patterned. At this time, first, after forming a resist pattern composed of a plurality of resist portions 21 arranged in a matrix at a pitch of 0.3 mm (FIG. 5A), a part of the resist portions 21 is removed in a wide width. To form a stepped resist pattern (FIG. 5B).

Then, aluminum 23a and 23b are vacuum-deposited on the common electrode substrate 14 on which the resist pattern is formed. At this time, the step coverage is lowered by increasing the step of the resist portion 21, and the vertical wall portion of the step has a portion where the resist is exposed without being covered with aluminum. FIG. 5C schematically shows this state.

Thereafter, by removing the resist portion 21 using a stripping solution such as acetone, the upper aluminum 23b portion is lifted off, and the lower aluminum 23a portion has one side of the common electrode substrate 1.
It is formed on a minute film-shaped minute mirror 18 fixed to the No. 4 film. (FIG.5 (d)).

The transparent electrode 20 is a strip (striped) electrode made of an ITO film, and is formed on the back surface of the counter substrate 16 (see FIG. 3).
32 pieces, for example, 0.3 mm pitch are arranged in parallel with the rows of the light emitting diodes 12a on the inner and lower surfaces so as to face the minute mirrors 18 (in FIGS. 3 and 4, the number is reduced for simplification). display.).

The light source control circuit device 22 is connected to the light emitting diode 12a and individually applies a voltage to the 32 light emitting diodes 12a to cause the light emitting diode 12a to emit light. The applied voltage can be analog-modulated in accordance with the input signal or digitally modulated in accordance with the number of pulses or the pulse width, whereby the emission intensity of the light-emitting diode 12a can be adjusted. it can.

The transparent electrode drive circuit device 24 includes the transparent electrode 2
It is connected to 0 and individually applies a voltage to the 34 transparent electrodes 20. At the time of driving, that is, at the time of scanning described later, for example, a positive voltage V1 of 12 V is applied, and at other times, a negative voltage V2 of several V is applied. Further, for example, a negative voltage V3 of about several V is applied as a bias voltage to the common electrode 14b of the common electrode substrate 14 to hold the transparent electrode 20 in a positive polarity with respect to the common electrode 14b.

As a result, when a drive voltage having a positive polarity is applied to the transparent electrode 20, electrostatic attraction acts on the micromirrors 18 located below and under the transparent electrode 20, and arrow A
As shown in FIG. 4, one side of the micromirror 18 that is in close contact with the common electrode substrate 14 and is not fixed to the common electrode substrate 14 is raised up to an angle of 45 ° with respect to the common electrode substrate 14 and raised, for example, by an arrow. As shown by B, it takes an inclined surface posture. Then, when the light of the light emitting diode 12a irradiated in parallel to the common electrode substrate 14 is incident on the micromirror 18 having the inclined surface shape, the light (reflected light) whose traveling direction is changed by 90 ° is directly above. 3 is transmitted through the transparent electrode 20, further transmitted through the counter substrate 16, and emitted from the front surface (upper surface) of the counter substrate 16 right above in FIG. At this time, an intermediate color tone can be expressed by adjusting the voltage applied to the light emitting diode 12a.

When the transparent electrode 20 is scanned to drive the transparent electrode 20 on the right side in FIG. 3, for example, the transparent electrode 20 is released from driving, that is, a voltage of negative polarity is applied to the transparent electrode 20. Then, the micromirror 18 falls down and returns to the original posture in the state of being in contact with the common electrode substrate 14. Then, even when the light of the light emitting diode 12a irradiated in parallel to the common electrode substrate 14 is incident on the micro mirror 18 having the tilted posture, the traveling direction is changed by 90 ° and the light is transmitted through the transparent electrode immediately above. No light (reflected light) is generated, and no light is emitted from the front surface of the counter substrate right above in FIG. At this time, for example, the adjacent micromirror 18 on the right is the previous micromirror 18
The same operation is performed to receive light from the light emitting diode 12a and generate light (reflected light) that passes through the transparent electrode immediately above. That is, the light emitting point of the counter substrate 16 moves (scans) to the right.

In the flat panel display device 10 according to the first example of the present embodiment configured as described above, a scanning voltage is applied to 32 transparent electrodes 20, while 32 light emitting diodes 12a are applied. By applying a signal voltage, so to speak, an image of 32 × 32 pixels is displayed by simple matrix driving. In this case, the flat panel display device 10 can support moving image display because the micro mirrors 18 can respond at high speed.

The flat-panel display device 10 according to the first example of the present embodiment uses light sources arranged in a line without using a large number of light sources arranged in a matrix, and thus is inexpensive and consumes less power. It is possible to obtain a flat display device, and
It is possible to obtain a flat-panel display device having a larger screen than that of a liquid crystal display, and a flat-panel display device of higher definition images than that of a light-emitting diode display.

By the way, regarding the light emitting diode used as the light source in the present invention, the conventional light emitting diode display in which the light emitting diode is directly used as the pixel display element is as follows.
As described above, there is a problem that high-definition image display cannot be performed, but there are also the following problems. That is, since a large number of light emitting diodes are required, the device is expensive. In addition, since a large number of light emitting diodes are used, there are variations in brightness among the individual light emitting diodes, and the display quality of the image deteriorates. Further, the device becomes more expensive due to the complicated structure in which a large number of light emitting diodes are connected. In this case, a difference in electric resistance may occur depending on the connection, which may cause brightness variations. In addition, since a large number of light emitting diodes are used for a large number of wirings in this manner, it takes time and money for repair. In addition, it is necessary to install a large number of cooling fans in order to suppress heat generated from a large number of light emitting diodes. The flat panel display device 10 according to the first example of the present embodiment.
Can be said to be superior in terms of the disadvantages of these light emitting diode displays.

Regarding the laser used as the light source in the present invention, conventionally, as shown in FIG. 2, the laser light from the laser light source 4 is projected on the screen 5, and the laser light is scanned at this time to display an image. There is a kind of projection display. However, since it is difficult to control the laser beam in the projection type display using the laser light source 4, a matrix type display method has not been developed so far. Therefore, the display device that displays on the screen 5 a so-called one-stroke simple image due to the locus of the scanned laser is limited. In this respect as well, it can be said that the flat panel display device 10 according to the first example of the present embodiment is superior.

Next, a display device according to the second example of the present embodiment will be described with reference to FIG.

Display device 2 according to the second example of the present embodiment
6, the basic configuration of the device is substantially the same as the display device 10 according to the first example of the present embodiment. For this reason, the same components are designated by the same reference numerals as those of the display device 10, some of them are not shown, and duplicate explanations are omitted.

Display device 2 according to the second example of the present embodiment
6 is a GaN-based ultraviolet light emitting laser 28a having a plurality of light sources 28.
And the counter substrate 16 of the plurality of transparent electrodes 20
The surface on the opposite side, that is, the lower surface of the transparent electrode 20 in FIG.
Y that emits yellow-green light emission _ThreeAl₅O₁₂: Ce-based firefly
It is different from the display device 10 in that the light body 32 is provided.
It

In the display device 26, when the ultraviolet laser light from the ultraviolet light emitting laser 28a is applied to the fluorescent substance 32, the fluorescent substance 32 emits yellowish green light, and the visible light is emitted from the counter substrate 16 to display. A display similar to the device 10 is obtained.

Display device 2 according to the second example of the present embodiment
6 can obtain the same effects as those of the display device 10 according to the first example of the present embodiment. Further, the display color can be easily adjusted by using the existing phosphor excited by ultraviolet rays.

In the display device 26, an ultraviolet light emitting diode may be used instead of the ultraviolet light emitting laser 28a.

Next, a display device according to a third example of the present embodiment will be described with reference to FIGS. 7 and 8.

Display device 3 according to the third example of the present embodiment
4 is the same light source 12 as the display device 10 or 26, the counter substrate 1
6, the transparent electrode 20 and the light source control circuit device 22 are provided, and the strip-shaped electrode substrate 36 and the two liquid crystal drive circuit devices 38 and 40 are provided. Further, a liquid crystal 42 is provided instead of the micro mirrors 18 of the display devices 10 and 26.

The description of the light source 12, the counter substrate 16 and the light source control circuit device 22 which are the same as those of the display device 10 will be omitted.

The strip electrode substrate 36 is used for the display device 10, 26.
Of the substrate base 36.
A strip-shaped electrode 36b made of aluminum is provided on the surface of a in a direction orthogonal to the row of the light sources 12, in other words, in a direction orthogonal to the plurality of strip-shaped transparent electrodes 20.
Like 0, a plurality of them are arranged at a pitch of 0.3 mm. The intersection of the strip electrode 36b and the transparent electrode 20 shown by the arrow C in FIG. 8 corresponds to one pixel.

The liquid crystal drive circuit device 38 includes a strip electrode 36.
For example, a pulsed AC voltage is applied to each of the plurality of electrodes 36b individually. In addition, the liquid crystal drive circuit device 40 is connected to the transparent electrodes 20 and individually, for example, in a pulse shape 30 with respect to the plurality of transparent electrodes 20.
An alternating voltage of about V is applied. The voltage application conditions can be the same as those for a normal liquid crystal display device.

The liquid crystal 42 is a polymer dispersion type liquid crystal (PDL).
C) is used to fill the sealed space between the strip electrode substrate 36 and the counter substrate 16.

When a voltage is applied between the transparent electrode 20 and the electrode 36b, for example, as shown by an arrow D, the electrode 36b is
The liquid crystal 42 above is in an aligned state. And
Even if the light of the light emitting diode 12a irradiated parallel to the strip electrode substrate 36 is incident on the aligned liquid crystal 42, the light of the light emitting diode 12a cannot change its traveling direction. It is not radiated from the front surface (upper surface) of 16 directly upward in FIG. 7. On the other hand, the transparent electrode 20
When the application of the voltage between the electrode 36b and the electrode 36b is released, for example, as shown by an arrow E, the liquid crystal 4 above the electrode 36b is released.
No. 2 has a disordered orientation. Then, when the light of the light emitting diode 12a irradiated in parallel to the strip electrode substrate 36 enters the aligned liquid crystal 42, the light emitting diode 1
The light 2a is scattered and radiated upward from the front surface (upper surface) of the counter substrate 16 in FIG. At this time, the light is slightly distributed with the peak immediately above it.

The display device 34 constructed as described above is
Image display can be performed by using the transparent electrode 20 as a scanning electrode and the one electrode 36b as a signal electrode for simple matrix driving. The image has a sufficient contrast for practical use. At this time, since the response speed of the liquid crystal 42 is as slow as several ms or more, the obtained image is close to a still image.

Display device 3 according to the third example of the present embodiment
4 uses light sources arranged in a line without using a large number of light sources arranged in a matrix, so that a flat display device with low power consumption can be obtained at a low cost, and is cheaper than a liquid crystal display. It is possible to obtain a large-screen flat-panel display device using such a liquid crystal, and it is possible to obtain a high-definition flat-panel display device as compared with a light-emitting diode display.

Next, a display device according to the fourth example of the present embodiment will be described with reference to FIG.

Display device 4 according to the fourth example of the present embodiment
As shown in FIG. 9, the device No. 4 has substantially the same basic configuration as the display device 34 according to the third example of the present embodiment. For this reason, the same components are designated by the same reference numerals as those of the display device 34, some of them are not shown, and duplicated explanations are omitted.

The display device 44 is formed by forming a matrix electrode substrate 46 in place of the strip electrode substrate 36 of the display device 34 and a solid electrode corresponding to the entire display surface in place of the strip transparent electrode 20. The display device 34 is different in that the transparent common electrode 48 is provided.

In the matrix electrode substrate 46, a plurality of active elements such as transistors or elements 46b such as switching elements are arranged in a matrix on a substrate base 46a made of, for example, a glass material. One element 46b corresponds to one pixel.

The display device 44 can display an image by performing active matrix driving using the transparent common electrode 48 as a scanning electrode and the element 46b as a signal electrode.

Display device 4 according to a fourth example of the present embodiment
In No. 4, the same effect as that of the display device 34 according to the third example of the present embodiment can be obtained, in particular, the response speed of the liquid crystal can be improved, and a larger display capacity can be realized. be able to.

In the first to fourth examples of the present embodiment described above, colorization of an image can be realized by using a combination of light emitting diodes, which are light sources, which emit light of different colors.

The first to the first embodiments of the present embodiment described above
The specific member of each component shown in each of the fourth examples and the substitute member thereof can be mutually used for each component of other examples as long as they do not impair the action and effect.

[0067]

According to the flat panel display device of the present invention,
It has a plurality of light sources that emit light in a one-dimensional direction, two substrates composed of a common electrode substrate and a counter substrate, a plurality of micromirrors, and strip-shaped transparent electrodes, and each light from the plurality of light sources is A simple matrix is constructed in which the parallel light is radiated between two substrates, and the radiated light is changed in its traveling direction by a micromirror that is electrostatically controlled and its posture is changed to pass through a counter substrate. Since it is configured to display an image by driving, it is possible to obtain a flat-panel display device that is inexpensive and consumes less power, and has a larger screen than a liquid crystal display and higher than a light emitting diode display. It is possible to obtain a flat-panel display device of a fine image.

Further, according to the flat panel display device of the present invention, a plurality of light sources, two substrates composed of the strip-shaped electrode substrate and the counter substrate, and a liquid crystal disposed between the two substrates,
Since it has a strip-shaped transparent electrode and is configured so that the irradiated light can change its traveling direction by the liquid crystal whose orientation is changed and is transmitted through the counter substrate, it is particularly cheaper than a liquid crystal display. A large-screen flat-panel display device can be obtained with a simple structure using liquid crystal.

Further, in the flat panel display device according to the present invention, when the active matrix drive system is adopted, a better response speed can be obtained and a larger display capacity can be realized.

Further, in the flat panel display device according to the present invention, it is preferable that the light source is a visible light emitting diode or a visible laser because an existing product having a good directivity characteristic can be easily obtained and used. .

Further, in the flat panel display device according to the present invention, the light source is an ultraviolet light emitting diode or an ultraviolet laser, and a phosphor is disposed on the surface of the transparent electrode or the transparent common electrode opposite to the counter substrate. In this case, the display color can be easily adjusted by using the existing phosphor excited by ultraviolet rays, which is preferable.

[Brief description of drawings]

FIG. 1 is a view schematically showing a conventional light emitting diode display.

FIG. 2 is a diagram schematically showing a conventional laser display.

FIG. 3 is a schematic configuration diagram of a flat-panel display device according to a first example of the present embodiment as seen from a side surface.

FIG. 4 is a schematic plan view of a flat panel display device according to a first example of the present embodiment.

FIG. 5 is a view for explaining a method of forming a micro mirror of the flat panel display device according to the first example of the present embodiment,
(A) and (b) show a state in which a resist pattern is formed, (c) shows a state in which aluminum is vacuum-deposited,
FIG. 3D is a diagram showing a state in which the resist pattern is removed and a micromirror is formed on the common electrode substrate.

FIG. 6 is a schematic configuration diagram of a flat-panel display device according to a second example of the present embodiment as viewed from the side.

FIG. 7 is a schematic configuration diagram of a flat-panel display device according to a third example of the present embodiment as seen from a side surface.

FIG. 8 is a schematic plan view of a flat panel display device according to a third example of the present embodiment.

FIG. 9 is a schematic configuration diagram of a flat-panel display device according to a fourth example of the present embodiment as seen from a side surface.

[Explanation of symbols]

10, 26, 34, 44 display device 12, 28 light source 12a light emitting diode 14 Common electrode substrate 14a, 36a, 46a Substrate base 14b Common electrode 16 Counter substrate 18 Micro mirror 20 Transparent electrode 21 resist 22 Light source control circuit device 23a, 23b Aluminum 24 Transparent electrode drive circuit device 28a Ultraviolet light emitting laser 32 phosphor 36 strip electrode substrate 36b electrode 38, 40 Liquid crystal drive circuit device 42 LCD 46 matrix electrode substrate 46b element 48 Transparent common electrode

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01L 33/00 H01L 33/00 LF term (reference) 2H041 AA12 AB13 AC06 AZ01 AZ05 2H089 HA04 RA04 TA02 TA18 2H091 FA45Y FA45Z FA46Y FA46Z GA03 HA06 JA02 LA11 LA30 5C080 AA10 AA18 CC06 DD07 DD26 DD27 JJ06 5F041 AA11 EE25 FF06 FF11

Claims (6)

[Claims] 1. A plurality of light sources which are arranged in a row and emit light in a one-dimensional direction, and a common electrode substrate and a counter substrate which face one side of the rows of the plurality of light sources and are opposed to each other with a predetermined distance therebetween. And a plurality of micromirrors arranged in a matrix between the two substrates, and a surface of the counter substrate facing the common electrode substrate and facing the micromirrors. , A plurality of strip-shaped transparent electrodes arranged in parallel to the rows of the plurality of light sources, and the respective lights from the plurality of light sources are irradiated in parallel between the two substrates and are irradiated. Light is changed in its traveling direction by about 90 ° by the micromirrors that are electrostatically controlled by the voltage applied between the common electrode substrate and the transparent electrode to change its posture, and the light is transmitted through the transparent electrode. The plurality of light sources and the plurality of light sources are configured to be transmitted through the counter substrate. Flat-panel display is characterized in connection with the driving circuit be configured to display an image by a simple matrix driving by applying a voltage by the respective transparent electrodes. 2. A row of a plurality of light sources arranged in a row and arranged to face a plurality of light sources that emit light in a one-dimensional direction with one side in contact with the row of the plurality of light sources and a predetermined distance apart. Two substrates consisting of a strip-shaped electrode substrate having a plurality of strip-shaped electrodes arranged in a direction orthogonal to the substrate and a counter substrate, a liquid crystal disposed between the two substrates, and the strip electrodes of the counter substrate. A plurality of strip-shaped transparent electrodes arranged in parallel with a row of the plurality of light sources are provided on a surface facing the substrate, and the respective lights from the plurality of light sources are irradiated in parallel between the two substrates. The radiated light is transmitted through the transparent electrode after being changed in its traveling direction by about 90 ° by the liquid crystal whose orientation is changed by electric field control by the voltage applied between the strip electrode substrate and the transparent electrode. The plurality of electrodes and the plurality of electrodes. Flat-panel display is characterized in connection with the driving circuit be configured to display an image by a simple matrix driving by applying a voltage by the respective transparent electrodes. 3. A plurality of light sources arranged in a row and emitting light in a one-dimensional direction, and arranged in a matrix with one side in contact with the row of the plurality of light sources and facing each other with a predetermined distance therebetween. Two substrates consisting of a matrix-shaped electrode substrate having a plurality of electrodes and a counter substrate, a plurality of micromirrors arranged between the two substrates corresponding to the plurality of electrodes, and a substrate of the counter substrate. A transparent common electrode is provided on the surface facing the matrix electrode substrate so as to face the plurality of minute mirrors, and the respective lights from the plurality of light sources are parallel to each other between the two substrates. And the irradiated light is electrostatically controlled by a voltage applied between the matrix electrode substrate and the transparent common electrode to change its posture to about 9 μm.
It is configured to change the direction of travel by 0 ° so as to pass through the counter substrate through the transparent electrode, and a voltage is applied by a driving circuit connected to each of the plurality of electrodes to display an image by active matrix driving. A flat-panel display device having the above structure. 4. A plurality of light sources arranged in one row and emitting light in a one-dimensional direction, and arranged in a matrix with one side in contact with the row of the plurality of light sources and facing each other with a predetermined distance therebetween. Two substrates consisting of a matrix-shaped electrode substrate having a plurality of electrodes and a counter substrate, and a liquid crystal disposed between the two substrates,
A transparent common electrode disposed so as to face the liquid crystal on a surface of the counter substrate facing the matrix electrode substrate, and light from each of the plurality of light sources is provided between the two substrates. The light is irradiated in parallel with the liquid crystal whose orientation is changed by the electric field controlled by the voltage applied between the matrix electrode substrate and the transparent common electrode to change the traveling direction by about 90 °. Is configured to pass through the counter substrate through the transparent common electrode, and a voltage is applied by a driving circuit connected to each of the plurality of electrodes to display an image by active matrix driving. A flat-panel display device characterized by the above. 5. The flat panel display device according to claim 1, wherein the light source is a visible light emitting diode or a visible laser. 6. The light source is an ultraviolet light emitting diode or an ultraviolet laser, and a phosphor is disposed on a surface of the transparent electrode or the transparent common electrode opposite to the counter substrate. The flat panel display device according to claim 1.