JPH11281965A - Optical address device and liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which has a low cost and a high yield to be suitable for the enlargement of the size and the improvement of definition. SOLUTION: This optical address device has plural plasma light emission channels, and a plasma light emission channel 21 has gas which can be ionized in the space surrounded with a first substrate 19, a second substrate 24, and a rib partition 20, and surfaces facing each other of first and second substrates 19 and 24 are provided with first and second electrodes 22 and 23. The first electrode 22 is a transparent electrode formed on all the surface of the plasma light emission channel 21, and light emitted from the plasma light emission channel 21 is transmitted through the first substrate 19 and the first electrode 22 and is emitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical address device used for a display device using an electro-optical material and a display device using the same. In particular, the present invention relates to an optical address device suitably used for a liquid crystal display device and a liquid crystal display device using the same.

[0002]

2. Description of the Related Art Liquid crystal display devices are classified into an electric addressing method, a thermal addressing method, and an optical addressing method according to their driving methods. Among them, the passive matrix (PM) method and the active matrix (AM) method of the electric addressing method which are currently most frequently used as the direct-view display device are currently used.

In recent years, there has been an increasing need for larger and higher definition display devices. However, the liquid crystal display device of the conventional type cannot sufficiently meet these needs, and a commercially available product has a diagonal of 20 inches and a diagonal of 3 even in the prototype stage.
At present, about 0 inches is the limit. In particular, the PM method has a problem that the contrast is reduced due to crosstalk as the number of pixels increases. Further, the AM method has a problem that it is difficult to form a large number of switching elements (especially thin film transistors: TFTs) without defects.

On the other hand, as an AM type liquid crystal display device which does not use a semiconductor switching element such as a TFT, a 19
In 1990, T. Buzak of Tektronix of the United States developed a plasma-addressed liquid crystal display device (PALC) (for example, Japanese Patent Application Laid-Open No. 1-217396). FIG. 1 schematically shows a cross-sectional structure of PALC.

[0005] The PALC 100 has a configuration in which a liquid crystal cell and a plasma cell are stacked. The liquid crystal layer 3 is sandwiched between the substrate 1 and the dielectric separator 4, and the liquid crystal layer 3 is driven by a potential difference between the signal electrode (column electrode) 2 and the dielectric separator 4. The plasma cell has a plurality of plasma discharge channels 5 in which a gap between a substrate 9 and a dielectric separator 4 is divided by a plurality of rib partition walls 6. An ionizable gas is sealed in the plasma discharge channel 5, and a plasma is generated by applying a discharge pulse voltage between the cathode 7 and the anode 8. The plurality of plasma discharge channels 5 extend in a direction orthogonal to the signal electrodes (column electrodes) 2, and the cathode 7 and the anode 8 function as scanning electrodes (row electrodes) 10, and are scanned line-sequentially.

[0006]

The liquid crystal display device using the above-described PALC system can be relatively easily enlarged in size as compared with a liquid crystal display device using a TFT. However, the dielectric separator 4 used for PALC is a thin plate made of glass, which is expensive and difficult to handle as the display device becomes larger, and the probability of breakage during the fabrication of the display device increases.

Further, when the PALC is driven, the plasma-side surface of the thin glass acts as a pseudo electrode. The thickness of the glass is about 50 to 100 μm, which is a thickness of a general nematic liquid crystal layer. It has a thickness of 10 times or more compared to a certain 3 to 6 microns. For this reason, when driving the PALC, it is necessary to apply a voltage ten times or more the voltage for effectively driving the liquid crystal layer. This causes problems such as an increase in the load on the drive circuit, an increase in power consumption, and accompanying heat generation.

Furthermore, since the above-mentioned thin glass is weak in strength, it is very difficult to form an electrode on the thin glass. Therefore, the electrode for plasma discharge is shown in FIG.
Is formed parallel to the plane of the substrate.
This is a cause of lowering the aperture ratio of the display device and is not preferable because it lowers display quality.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a low cost suitable for enlargement and high definition.
It is an object of the present invention to provide a high-yield optical address device and a liquid crystal display device using the same.

[0010]

An optical addressing device according to the present invention has a plurality of plasma emission channels, wherein the plasma emission channels include a first substrate and a second substrate facing the first substrate.
A substrate, a rib partition formed between the first substrate and the second substrate, an ionizable gas in a space surrounded by the first substrate, the second substrate, and the rib partition; The opposing surfaces of the first substrate and the second substrate are
An electrode and a second electrode, wherein the first electrode is a transparent electrode formed on the entire surface of the plasma emission channel, and light generated from the plasma emission channel transmits through the first substrate and the first electrode. Then, the above-mentioned object is achieved.

[0011] The first electrode may be a single electrode common to the plurality of plasma emission channels.

[0012] The first electrode may be a striped electrode formed for each of the plurality of plasma emission channels.

[0013] The semiconductor device may further include a metal electrode connected to the first electrode.

It is preferable that at least a part of the metal electrode is formed at a position overlapping the rib partition when viewed from a direction perpendicular to the first substrate.

An optical addressing device according to the present invention has a plurality of plasma emission channels, the plasma emission channels comprising a first substrate, a second substrate facing the first substrate, and a first substrate and a second substrate. A rib partition formed between the first and second substrates, the first substrate, the second substrate, and a space surrounded by the rib partition having an ionizable gas in the first substrate and the second substrate; Each has a first electrode and a second electrode, wherein the first electrode and the second electrode are stripe-shaped electrodes parallel to each other, and at least a part of the first electrode is The rib is formed at a position overlapping with the rib partition wall when viewed from a direction perpendicular to the first substrate, thereby achieving the above object.

The liquid crystal display device according to the present invention comprises a third substrate, a fourth substrate, a liquid crystal layer sandwiched between the third substrate and the fourth substrate, and a liquid crystal layer side of the third substrate. And a plurality of pixel electrodes arranged in a matrix provided on the liquid crystal layer side of the fourth substrate, and electrically connected to the plurality of pixel electrodes via a photoconductive layer. A plurality of stripe-shaped signal electrodes parallel to each other, and the above-mentioned optical address device provided outside the fourth substrate and irradiating at least a part of the photoconductive layer with light. Changing the electrical conductivity of the photoconductive layer by switching light from the substrate and switching the electrical connection between the pixel electrode and the signal electrode, thereby optically addressing the liquid crystal layer. Objective is achieved.

The optical address device further has a metal electrode connected to the first electrode, and the third substrate or the fourth substrate further has a black matrix, and at least a part of the metal electrode is When viewed from a direction perpendicular to the first substrate, the first substrate may be formed at a position overlapping with the black matrix and / or outside a display area.

The operation will be described below.

One of the discharge electrodes of the plasma emission channel of the optical addressing device according to the present invention comprises a transparent electrode,
It is formed on the entire surface of the plasma emission channel. Therefore, a decrease in the aperture ratio due to the discharge electrode is suppressed. In addition, another optical addressing device of the present invention uses a pair of stripe-shaped discharge electrodes, but at least a part of the stripe-shaped electrodes is formed at a position overlapping the rib partition or the black mask or outside the display region. A decrease in the aperture ratio due to the discharge electrode is small.

The liquid crystal display of the present invention has a signal electrode electrically connected to a pixel electrode (or a striped electrode) via a photoconductive layer, and a plurality of light sources for irradiating the photoconductive layer with light. doing. By selectively irradiating the photoconductive layer with light, it is possible to select a pixel electrode (for example, a line is line-sequentially) connected to the signal electrode. Therefore, the voltage applied between the counter electrode (for example, the column electrode) and the pixel electrode can be line-sequentially scanned by switching the light source. That is, the liquid crystal layer can be optically addressed. The arrangement of the electrodes for applying a voltage to the liquid crystal layer, the photoconductive layer, and the light source can be variously selected.

The liquid crystal display device according to the present invention uses a conventional PA
An optical addressing device having a configuration similar to that of an LC plasma cell is used. However, since addressing is performed using light, there is no need to use a very thin glass sheet unlike PALC. That is, as long as the light intensity and the sensitivity of the photoconductive layer are sufficient, there is no limitation on the thickness of the substrate provided between the plasma light emitting portion and the photoconductive layer, and the handling in the manufacturing process is taken into consideration. It can be designed appropriately.

[0022]

Embodiments of the present invention will be described below.

(Embodiment 1) The liquid crystal display device 200 according to the present embodiment is schematically shown in FIG. Liquid crystal display device 200
Has an optical addressing device 200a, a substrate 11 having a counter electrode 12, and a liquid crystal layer 13 sandwiched therebetween. The counter electrode 12 is formed over substantially the entire display region using a transparent conductive material such as ITO (indium tin oxide). If necessary, color filters may be formed.

The optical addressing device 200a has a plurality of striped plasma emission channels 21 in which a gap between the substrate 19 and the substrate 24 is divided by a plurality of rib partitions 20. An ionizable gas is sealed in the plasma emission channel 21, and a plasma is generated by applying an AC voltage between the first electrode 22 and the second electrode 23. The first electrode 22 includes a plurality of plasma emission channels 2.
It may be formed as a single electrode common to one or a striped electrode for each plasma emission channel 21. To increase the aperture ratio, the first electrode 22
Is preferably formed at least on the entire surface of the plasma emission channel 21.

A signal electrode 14, a photoconductive layer 15, and a pixel electrode 16 are formed on the surface of the substrate 19 on the liquid crystal layer 13 side (the side opposite to the plasma emission channel 21) from the liquid crystal layer 13 side. . The pixel electrodes 16 are a plurality of dot-shaped electrodes arranged in a matrix. The signal electrode 14 is a plurality of striped electrodes parallel to each other, and extends in a direction orthogonal to the direction in which the plasma emission channel 21 extends. The signal electrode 14 and the pixel electrode 16 are
Connected through. The photoconductive layer 15 may be formed as a single single photoconductive film common to the plurality of signal electrodes 14 and the plurality of pixel electrodes 16,
For every four, a stripe-shaped photoconductive film may be formed. Of course, a dot-shaped photoconductive film can be formed for each pixel electrode 16.

The edge of the pixel electrode 16 (the rib partition 20)
Is formed under the insulating layer 17. Metal wiring 18 / insulating layer 17
The / pixel electrode 16 functions as a storage capacitor (auxiliary capacitor). In this example, the metal wiring 18 is formed as a stripe-shaped electrode extending in a direction orthogonal to the signal electrode 14 (a direction parallel to the plasma emission channel 21), but is not limited thereto.

In order to enhance the luminous efficiency of the optical addressing device 200a, the type and gas pressure of the gas sealed in the plasma light-emitting channel 21 and the structure (size of space) of the plasma light-emitting channel may be optimized. For example, when emitting ultraviolet light, for example, helium, xenon, or a mixed gas thereof can be used. Furthermore, near-ultraviolet light can be emitted by mixing mercury with these mixed gases. When emitting visible light, a mixed gas of neon and xenon may be used, or an appropriate phosphor may be applied to the inner wall of the plasma emission channel 21 to convert ultraviolet light into visible light. .
The use of ultraviolet light as addressing light has the advantage that a transmission type liquid crystal display device can be formed.

In the liquid crystal display device according to the present invention, if the intensity of light from the light source for optical addressing and the sensitivity of the photoconductive layer are sufficient, the substrate 19 provided between the liquid crystal cell and the optical addressing device 200a is provided. There is no limitation on the material and thickness of the material, and it can be appropriately set in consideration of the yield of the manufacturing process. When ultraviolet rays are used, for example, a quartz substrate or a fused silica substrate can be used. When a large-screen display device is configured, the substrate 19 may be configured by a plurality of substrates.

The material of the photoconductive layer 15 may be a material whose electric conductivity is sufficiently changed with respect to the addressing light, from a known material in consideration of the wavelength and intensity of the addressing light and the configuration of the device. Just choose. For ultraviolet light, for example,
Titanium oxide can be used. For visible light, amorphous silicon can be used.

A so-called plasma display device (PDP) is known as a display device using plasma emission. P
DP is a self-luminous display device that converts ultraviolet light emitted by plasma into visible light with a phosphor and uses the visible light for display. In contrast, in the liquid crystal display device according to the present invention, light obtained by plasma emission is used for addressing pixels. Light used for display is light from a backlight in the case of a transmissive type, and is ambient light in the case of a reflective type, as in a conventional liquid crystal display device. Therefore, the intensity of plasma emission only needs to be able to sufficiently change the electrical conductivity of the photoconductive layer, and relatively weak light can be used. For example, in the case of using ultraviolet light by plasma emission, it is not necessary to use the bright line, and optimization may be performed in consideration of the sensitivity of the photoconductive layer and the transmittance characteristics of the substrate.

The principle of operation of the optical address device 200a and the liquid crystal display device 200 according to this embodiment will be described with reference to FIG. The storage capacity is omitted for simplicity.

By applying an AC voltage between the electrode 22 and the electrode 23 in the selected plasma emission channel 21, the gas in the plasma emission channel 21 is ionized and plasma is generated. Plasma generates light of various wavelengths depending on the type and pressure of the gas (FIG. 3).
(A)).

This light passes through the substrate 19 and the pixel electrode 16 and irradiates the photoconductive layer 15. The photoconductive layer 15 irradiated with light increases its electrical conductivity and becomes a conductor, so that the pixel electrode 16 and the signal electrode 14 are electrically connected. When a driving voltage is applied between the counter electrode 12 and the signal electrode 14 when the photoconductive layer 15 is in a conductive state, a voltage is applied to the liquid crystal layer 13 between the pixel electrode 16 and the counter electrode 12, and a voltage corresponding to the pixel is applied. The liquid crystal layer 13a in the region to be driven is driven (see FIG. 3).
(B)).

Next, when the voltage between the electrodes 22 and 23 is turned off and the plasma emission is stopped, the electric conductivity of the photoconductive layer 15 decreases and the photoconductive layer 15 becomes an insulator, and the pixel electrode 16 and the signal electrode 1
4 is electrically insulated. Pixel electrode 16, photoconductive layer 1
5, the counter electrode 12, and the liquid crystal layer 13 between them function as a capacitor, so that a charge corresponding to the previously applied driving voltage is held on the pixel electrode 16, and the driving state of the liquid crystal layer 13a is held. (This is a so-called sample hold) (FIG. 3C). By forming the storage capacitor, the charge retention characteristics can be further improved.

A state in which plasma emission is stopped (extinction state)
In this case, even if a driving voltage is applied between the counter electrode 12 and the signal electrode 14, the pixel electrode 16 and the signal electrode 14 are electrically separated from each other.
Is not driven. Next frame (or field)
Then, a new driving voltage is applied to the pixel electrode 16 during a period in which the plasma emission channel 25a is selected (period of plasma emission). In the extinction state, the liquid crystal layer driven when a voltage is applied between the counter electrode 12 and the signal electrode 14 is limited to the liquid crystal layer on the signal electrode 14. Therefore, this portion is covered with a black matrix or the like. There is no problem of display quality degradation.

The optical address device 200a and the liquid crystal display device 200 according to this embodiment can be formed, for example, by the following method. The manufacturing method will be described with reference to FIGS.

As shown in FIGS. 4A (a) and (b),
An ITO (opposite electrode) having a thickness of about 50 nm is formed on a glass substrate 11 having a thickness of about 1.1 mm by a sputtering method, and an opposing electrode 12 is formed. If necessary, an alignment film and a color filter may be formed.

As shown in FIGS. 4A to 4D, for example, for a glass substrate 24 having a thickness of about 1.1 mm, for example,
Nickel is deposited to a thickness of about 1 μm by a sputtering method, and a striped electrode 23 is formed by etching.
(A) and (b)). On this, a glass paste is applied and fired so as to have a thickness of about 20 μm to form an insulating layer 26, and a magnesium oxide layer 27 of about 200 nm is formed on the insulating layer 26 (FIG. 4B (c)). . On the surface of the obtained substrate, a rib partition 20 of about 300 μm is formed by screen printing using, for example, a glass paste (FIG. 4B (d)).

As shown in FIGS. 4A to 4F, first, a transparent conductive film 22 having a thickness of about 15 nm is formed on the entire surface of a substrate 19 having a thickness of about 0.7 mm by sputtering. Next, apply a glass paste to a thickness of 20 μm.
After baking, an insulating layer 28 is formed, and then a magnesium oxide layer 29 having a thickness of about 200 nm is formed.
(A)). When using ultraviolet light as address light,
It is preferable to use a material that transmits ultraviolet light (for example, quartz or fused silica) as the material of the substrate 19. In addition, the transparent electrode 22 / the insulating layer 28 are provided at positions corresponding to the signal electrode 14 portion (described below). / Magnesium oxide 29
Is preferably provided (FIG. 4D).

Further, about 0.1
Aluminum having a thickness of μm is vapor-deposited and etched in a stripe shape to form aluminum wiring 18 (FIG. 4C (b)). By anodic oxidation of the obtained aluminum wiring 18, an oxide film 17 is formed on the surface thereof (FIG. 4C (c)). A transparent conductive film having a thickness of about 15 nm is formed thereon by sputtering, and is etched in a dot shape to form the pixel electrode 16 (FIG. 4D). Here, the structure of the aluminum wiring 18 / oxide film 17 / pixel electrode 16 functions as a storage capacitor.

Further, about 0.
A 1 μm titanium oxide film is formed as the photoconductive layer 15 (FIG. 4C (e)). The stripe-shaped signal electrode 14 is formed thereon using, for example, aluminum. The stripe directions of the signal electrode 14 and the aluminum wiring 18 are orthogonal to each other. If necessary, an alignment film may be formed.

Next, the substrates 19 and 24 are bonded together so that the stripe directions of the signal electrodes 14 and the electrodes 23 are orthogonal to each other, and the electrodes 22 and 23 are opposed to each other. After the inside is depressurized, for example, a mixed gas of helium and xenon is sealed to form the plasma emission channel 21.

Finally, the substrate 11 and the substrate 19 are, for example, 5 μm so that the opposing electrode 12 and the signal electrode 14 face each other.
The liquid crystal display device 200 is obtained by laminating via a m-spacer and injecting a nematic liquid crystal material into the space to form a liquid crystal layer 13. The liquid crystal layer 13 can be formed using a liquid crystal material used in a conventional active matrix type liquid crystal display device. For example, a liquid crystal material such as a nematic liquid crystal or a cholesteric liquid crystal can be used.

The electrodes 22 and 23 of the liquid crystal display device 200
By applying an AC voltage of about 150 V during the period, a mixed gas of helium and xenon is turned into plasma, and ultraviolet light can be generated. The liquid crystal layer 13 on the pixel electrode 16 can be driven by applying a drive voltage between the counter electrode 12 and the signal electrode 14 in a state where the ultraviolet light is emitted.

The charge retention time can be changed by changing the width of the aluminum wiring 18 under the pixel electrode 16, the thickness of the oxide film 17, the type (sputtering silicon nitride on the oxide film 17, etc.), and the like. Needless to say, this is possible.

The structure and material of the plasma emission channel are not limited to the above examples, and may be appropriately set in consideration of the gas type, gas pressure, and discharge voltage (DC or AC or voltage value) according to the emission wavelength. The insulating layer and the magnesium oxide layer can be omitted.

(Embodiment 2) When the size of the optical addressing device and the liquid crystal display device of Embodiment 1 is increased, a transparent conductive material such as ITO has a relatively low electric conductivity. In some cases, such as delay of the data, distortion of the voltage waveform, and decrease in amplitude. In this embodiment, a metal electrode electrically connected to the transparent electrode is formed in order to avoid the above problem.

In the apparatus of the present embodiment, the first embodiment
Between the substrate 19 and the electrode 22 of the liquid crystal display device 200 of
For example, a metal electrode is formed using aluminum. The metal material used is not limited to aluminum and may be any material having a lower electrical resistance than ITO.

A preferred arrangement of the metal electrodes will be described with reference to FIG. FIG. 5 shows the display area of the liquid crystal display device 200.
It is assumed that this is an area represented by reference numeral 50 in FIG. Before or after forming the transparent electrode 22 on the substrate 19, FIG.
A metal electrode 51 and a metal electrode 52 shown in FIG. The metal electrode 51 is preferably formed outside the display area 50, and the metal electrode 52 is preferably formed at a position in the display area 50 corresponding to the rib partition 20 (see FIG. 2). When a black matrix is formed on the opposite substrate (the substrate 11 in FIG. 2), it is preferable that the metal electrode 52 be formed so as to overlap the black matrix when viewed from the substrate surface.

Embodiment 3 In this embodiment, a striped electrode made of a metal material is formed as a discharge electrode. Other configurations are the same as those of the first embodiment, and thus detailed description is omitted.

This embodiment will be described with reference to FIG. A color filter layer 63 (for example, including R: 63a and G: 63b) and a black matrix 64 are formed on a substrate 61 (corresponding to the substrate 11 of the first embodiment). The substrate 69 (corresponding to the substrate 19 of the first embodiment) includes, for example,
The electrode 72 made of nickel wiring (the electrode 22 of the first embodiment)
) Is formed. This electrode 72 is connected to the parallel portion 7
2a and a convex portion 72b, and the parallel portion 72a is a rib partition wall 80.
And the convex portion 72b is formed by the black matrix 64 and the substrate 61.
Are formed at positions overlapping with each other when viewed from a direction perpendicular to. On the substrate 74 (corresponding to the substrate 24 of the first embodiment), for example, an electrode 73 made of nickel wiring is provided.
(Corresponding to the electrode 23 of the first embodiment). The electrode 73 has a parallel portion 73a and a convex portion 73b. The parallel portion 73a is formed at a position overlapping with the rib partition wall 80, and the convex portion 73b is formed at a position overlapping with the black matrix 64 when viewed from a direction perpendicular to the substrate 61. Have been. In this embodiment,
Glass paste and magnesium oxide layer are omitted. In this manner, by at least partially overlapping the plasma discharge electrode 72 and the electrode 73 with the black matrix 64 and the rib partition wall 80, it is possible to suppress a decrease in aperture ratio due to the plasma discharge electrode. In addition, it is not necessary to arrange the projections of these electrodes under all the black matrices, and they may be modified according to the configuration of the device. For example, three primary color filters of red, green, and blue may be set as one set and arranged only on both sides thereof. The optical addressing device of the present embodiment can generate plasma emission by applying, for example, a DC (pulse) voltage of 200 V between the electrode 72 and the electrode 73.

[0052]

As described above, according to the present invention, a new optical address device and a new liquid crystal display device using the same are provided. The liquid crystal display device according to the present invention is
Since an active element such as a TFT is not required, it can be manufactured at a high yield at a relatively low cost. Furthermore, since addressing is carried out by light, the extremely thin (about 50 μm) dielectric separator required in the conventional PALC is not required, and it can be manufactured relatively inexpensively at a higher yield than the conventional PALC. A liquid crystal display device that can be driven at a lower voltage than PALC can be provided.

One of the discharge electrodes of the plasma emission channel of the optical addressing device according to the present invention comprises a transparent electrode,
It is formed on the entire surface of the plasma emission channel. Therefore, a decrease in the aperture ratio due to the discharge electrode is suppressed. Further, another optical addressing device of the present invention uses a pair of stripe-shaped discharge electrodes, but at least a part of the stripe-shaped electrodes is formed at a position overlapping with the rib partition or the black matrix or outside the display region. A decrease in the aperture ratio due to the discharge electrode is small.

When a backlight is provided in the transmissive display device of the present invention, an ultraviolet absorbing layer (for example, a film made of a polymer) may be added as needed between the backlight and the display device. Further, in the liquid crystal display device according to the present invention, the structure of the liquid crystal layer is not limited (for example, a host-guest type liquid crystal, a cholesteric liquid crystal, a polymer dispersed type liquid crystal, etc.), and widely known liquid crystal layers can be used.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a cross-sectional structure of a conventional PALC.

FIG. 2 is a schematic sectional view showing an example of a liquid crystal display device according to the present invention.

FIG. 3 is a schematic cross-sectional view illustrating the operation principle of the liquid crystal display device according to the present invention.

FIG. 4A is a schematic view illustrating an example of a method for manufacturing a liquid crystal display device according to the present invention.

FIG. 4B is a schematic view illustrating an example of a method for manufacturing a liquid crystal display device according to the present invention.

FIG. 4C is a schematic view showing an example of a method for manufacturing a liquid crystal display device according to the present invention.

FIG. 4D is a cross-sectional view schematically showing a configuration example of an intermediate substrate used in the liquid crystal display device according to the present invention.

FIG. 5 is a schematic diagram showing an example of an arrangement of metal wirings of the optical address device according to the present invention.

FIG. 6 is a schematic diagram showing an example of arrangement of metal wirings of the liquid crystal display device according to the present invention.

DESCRIPTION OF SYMBOLS 1 Glass substrate 2 Signal (column) electrode 3 Liquid crystal layer 4 Dielectric separator 5 Plasma discharge part 6 Rib partition 7 Cathode 8 Anode 9 Glass substrate 10 Scanning (row) electrode 11 First substrate 12 Counter electrode 13 Liquid crystal layer Reference Signs List 14 signal electrode (column electrode) 15 photoconductive layer 16 pixel electrode (dot-like) 17 insulating layer 18 metal wiring 19 substrate 20 rib partition 21 plasma emission channel 22 first electrode (discharge electrode) 23 second electrode (discharge electrode) ) 24 substrates

Claims (8)

[Claims] 1. A plasma emission channel having a plurality of plasma emission channels, wherein the plasma emission channel is formed between a first substrate, a second substrate facing the first substrate, and the first substrate and the second substrate. And a space surrounded by the rib partition, the first substrate, the second substrate, and the rib partition having an ionizable gas, and the opposing surfaces of the first substrate and the second substrate are respectively ,
A first electrode and a second electrode, wherein the first electrode is a transparent electrode formed on the entire surface of the plasma emission channel, and the light generated from the plasma emission channel emits light from the first substrate and the first electrode. An optical addressing device that is transmitted through and emitted. 2. The optical addressing device according to claim 1, wherein the first electrode is a single electrode common to the plurality of plasma emission channels. 3. The optical addressing device according to claim 1, wherein the first electrode is a stripe-shaped electrode formed for each of the plurality of plasma emission channels. 4. The optical addressing device according to claim 1, further comprising a metal electrode connected to said first electrode. 5. The optical addressing device according to claim 4, wherein at least a part of the metal electrode is formed at a position overlapping the rib partition when viewed from a direction perpendicular to the first substrate. 6. A plasma emission channel having a plurality of plasma emission channels, wherein the plasma emission channel is formed between a first substrate, a second substrate facing the first substrate, and the first substrate and the second substrate. And a space surrounded by the rib partition, the first substrate, the second substrate, and the rib partition having an ionizable gas, and the opposing surfaces of the first substrate and the second substrate are respectively ,
A first electrode and a second electrode, wherein the first electrode and the second electrode are stripe-shaped electrodes parallel to each other, and at least a part of the first electrode is in a direction perpendicular to the first substrate. An optical addressing device formed at a position overlapping the rib partition wall when viewed from above. 7. A third substrate, a fourth substrate, a liquid crystal layer sandwiched between the third substrate and the fourth substrate, and an electrode layer provided on the liquid crystal layer side of the third substrate. A plurality of pixel electrodes arranged in a matrix provided on the liquid crystal layer side of the fourth substrate; and a plurality of parallel stripes electrically connected to the plurality of pixel electrodes via a photoconductive layer. A plurality of signal electrodes, and the light addressing device according to any one of claims 1 to 6, which is provided outside the fourth substrate and irradiates at least a part of the photoconductive layer with light. Changing the electrical conductivity of the photoconductive layer by switching light from the photo-addressing device, and switching the electrical connection between the pixel electrode and the signal electrode, thereby causing the liquid crystal layer to emit light. Liquid crystal display device to address. 8. The optical address device further includes a metal electrode connected to the first electrode, the third substrate or the fourth substrate further includes a black matrix, and at least one of the metal electrodes The liquid crystal display device according to claim 7, wherein the portion is formed at a position overlapping with the black matrix and / or outside a display area when viewed from a direction perpendicular to the first substrate.