JP2002196310A - Plasma address liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a crosstalk phenomenon without lowering the brightness of the display of a picture by lowering the opening ratio of a display cell. SOLUTION: In this liquid crystal display device, a picture signal is impressed on signal electrodes by column inversion drive inverting the picture signal for every adjacent plural lines of signal electrodes Y0 to Ym and the width of a black matrix shielding the light between signal electrodes on which the picture signal whose polarity is inverted is to be impressed is made to be wider than that of the black matrix formed between other signal electrodes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma addressed liquid crystal display having a flat panel structure in which a display cell and a plasma cell are arranged to face each other.

[0002]

2. Description of the Related Art A plasma addressed liquid crystal display device has a flat panel structure having a display cell and a plasma cell arranged on both sides of an intermediate sheet so as to face each other. A plasma addressed liquid crystal display having such a structure is disclosed, for example, in Japanese Patent Application Laid-Open No. Hei 4-265931.

FIG. 5 is a sectional view showing the configuration of the plasma addressed liquid crystal display device 1. As shown in FIG.

[0004] This plasma addressed liquid crystal display device 1
It has an intermediate sheet 2 formed of a thin sheet glass or the like called a microsheet, and a plasma cell 3 and a display cell 4 are provided with the intermediate sheet 2 interposed therebetween.

The plasma cell 3 provided below the intermediate sheet 2 has a glass substrate 5 at a predetermined distance from the intermediate sheet 2. Between the glass substrate 5 of the plasma cell 3 and the intermediate sheet 2, a plurality of mutually parallel partition walls 8 are provided at regular intervals. And the glass substrate 5 are divided into stripe-shaped discharge channels 9 along the row direction. Inside each discharge channel 9 partitioned by each partition wall 8, a pair of discharge electrodes 10 functioning as an anode A and a cathode K in the case of a DC drive type.
Are provided respectively. A dischargeable gas is sealed in the space inside each discharge channel 9, and a plasma discharge is generated by applying a voltage to the pair of discharge electrodes 10.

The display cell 4 has a glass substrate 7 arranged at a predetermined interval from the intermediate sheet 2.
On the surface of the glass substrate 7 facing the intermediate sheet 2, for example, color filters 13 for representing RGB primary colors are provided, and RGB filters are provided between the color filters 13.
A black matrix (not shown in FIG. 5) for shielding the gap between the three primary colors is formed. This black matrix shields the gap between each color and
It has a function of suppressing the crosstalk phenomenon peculiar to the plasma addressed liquid crystal display device. On the color filters 13 provided on the glass substrate 7, a plurality of signal electrodes Y are respectively formed along the column direction so as to be orthogonal to the discharge channels 9. Therefore, each color filter 13 is also formed along the column direction like each signal electrode Y, and a black matrix is formed between each color filter 13. Then, each signal electrode Y is connected to a discharge channel 9 formed in the plasma cell 3.
Are intersected with each other, the pixels 12 are arranged in a matrix. Then, the space between the glass substrate 7 and the intermediate sheet 2 is sealed by the sealant 6, and the liquid crystal 11 is sealed in the sealed portion.

A backlight 14 as a light source is attached to the glass substrate 5 of the plasma cell 3, and light emitted from the backlight 14 passes through the plasma cell 3 and the display cell 4 to display images. The light is emitted from the cell 4.

In the plasma addressed liquid crystal display device 1, a plasma discharge is generated in a line-sequential manner for each discharge channel 9 along the row direction, and the discharge channels 9 are switched and scanned. Display driving is performed by applying an image signal to each signal electrode Y extending along the column direction of the display cells 4 in synchronization with the sequential switching scan.

When a plasma discharge is generated in the discharge channel 9, the inside of the discharge channel 9 is filled with charged particles, and the potential of the discharge channel 9 becomes substantially uniform, so that one row of pixels is selected. That is, one discharge channel 9 has 1
It corresponds to one scanning line and functions as a sampling switch. When the sampling switch is turned on, an image signal (signal voltage) is applied to each signal electrode Y of the display cell 4.
Is applied, the display cell 4 is sampled by the anode potential of the discharge channel 9 and each pixel 12
Is turned on or off.

When the plasma sampling switch is turned off, the sampling of the display cell 4 is completed, and the image signal of the signal electrode Y is written to each pixel 12. The display cell 4 performs image display by modulating incident light from the backlight 14 according to an image signal written to each pixel 12.

FIG. 6 is an explanatory diagram schematically showing two of a plurality of pixels 12 arranged in a matrix. FIG. 6 shows only two signal electrodes Y1 and Y2 and one anode A1 for easy understanding.

The pair of pixels 12 has a structure in which the signal electrodes Y1 and Y2 of the display cell 4, the liquid crystal 11, the intermediate sheet 2, and the discharge channel 9 of the plasma cell 3 are sequentially stacked.

The discharge channel 9 is used during plasma discharge.
It is maintained substantially at the anode potential. When an image signal is applied to each of the signal electrodes Y1 and Y2 while the discharge channel 9 is maintained at the anode potential, the liquid crystal 1
1 and the intermediate sheet 2 are charged.

On the other hand, when the plasma discharge in the discharge channel 9 ends, the anode potential disappears, and the discharge channel 9 returns to the insulating state.
The injected charge is maintained in the floating potential and is held in each pixel 12, so that a so-called sampling and holding operation is performed.

Therefore, the discharge channel 9 functions as an individual sampling switch element provided in each pixel 12, and is schematically shown in FIG. 6 using a switch symbol S1.

On the other hand, the liquid crystal 11 and the intermediate sheet 2 held between the signal electrodes Y1 and Y2 and the discharge channel 9
Functions as a sampling capacitor. Sampling switch S1 by line sequential scanning of discharge channel 9
Is turned on, the image signal applied to each of the signal electrodes Y1 and Y2 is written to the sampling capacitor, and each pixel 12 is turned on or off according to the level of the signal voltage. Further, even after the sampling switch S1 is turned off, the signal voltage is held in the sampling capacitor, whereby the active matrix operation of the liquid crystal display device is performed.

In this case, the effective voltage applied to the liquid crystal 11 of each pixel 12 is determined by the capacitance division between the liquid crystal 11 and the intermediate sheet 2. Therefore, as the thickness of the intermediate sheet 2 decreases, the capacity of the intermediate sheet 2 decreases,
Since the effective voltage applied to the liquid crystal 11 increases, if the intermediate sheet 2 can be formed as thin as possible, the voltage level of the image signal to each of the signal electrodes Y1 and Y2 can be lowered accordingly.

[0018]

A display cell used in a plasma addressed liquid crystal display device generally contains a liquid crystal as an electro-optical material. For this liquid crystal,
When a DC voltage is constantly applied, the quality characteristics of the liquid crystal deteriorate, so that the display cell is usually driven by an AC voltage.

The display cell 4 in which the liquid crystal 11 is sealed is basically driven by frame inversion as shown in FIG. That is, in a certain frame period, as shown in FIG. 7A, a positive polarity image signal is written over all the pixels 12 of the display panel, and in the next frame, FIG.
As shown in (B), a negative image signal is written over all the pixels 12 of the display panel. As described above, according to the frame inversion driving method, the polarity of the image signal applied to each signal electrode Y is inverted every frame period.

However, in such a simple frame inversion drive, complete AC drive is not performed due to a slight level shift of an image signal, asymmetry of a signal circuit, and the like, and a positive image signal is generated. A difference occurs in the luminance of the entire screen between the frame to be written and the frame to which the negative image signal is written. For this reason, the modulation of the luminance occurs in each frame period, and may be recognized by the observer as flicker (screen flicker).

In order to avoid flicker synchronized with the frame period, a so-called line inversion drive is employed.

FIG. 8 is a schematic diagram for explaining this line inversion driving.

According to the line inversion driving, in a certain frame, as shown in FIG. 8A, a positive image signal is written in an odd line and a negative image signal is written in an even line. In the display cell 4, in order to realize the line inversion driving, it is necessary to invert the polarity of the image signal applied to each signal electrode Y at a high speed every horizontal period (1H).

In the next frame, as shown in FIG. 8B, a negative image signal is written in the odd lines and a positive image signal is written in the even lines. Thus, the line inversion drive and the frame inversion drive can be executed together.

According to this driving method, the flicker appears because the polarity of each pixel 12 is inverted every frame period, but the luminance change of each pixel 12 is an even number for the entire screen of the display panel. The line and the odd line are reversed, and no flicker is recognized in a normal observation state.

However, in the plasma addressed liquid crystal display device 1 in which the row of the pixel 12 is selected by the plasma discharge of the plasma cell 3, one discharge channel 9 corresponds to one scanning line (one line). The corresponding pixel 12 row is selected by exciting the plasma discharge for each line. As described above, the discharge channel 9 functions as a sampling switch. When the plasma discharge is completed, an image signal is written to the pixel 12, and at the same time as the plasma discharge ends, the discharge channel 9 becomes insulated and the switch is completely turned off. Ideally, it would be in a blocked state. However, in practice, the charged particles generated by the plasma discharge contain a considerable amount of metastable particles, so that it takes some time before the metastable particles disappear. For this reason, it takes a long time until the charged particles disappear (decay), and when the horizontal period (1H) assigned to the line is exceeded, the sampling switch is not completely shut off, and the next line is not connected. The image signal of the inverted polarity to be written is sampled. That is, if the decay is long,
The image signal to be written to the next line is overwritten on the image signal to be written.

Therefore, in the plasma addressed liquid crystal display device 1, when the line inversion drive is performed,
Since the polarity inversion is performed for each line, an image signal having the opposite polarity may be overwritten to cause a large write loss.

In order to compensate for such a write loss, it is originally necessary to apply a voltage higher than the signal voltage to be written to the signal electrode Y. Further, if there is a variation in the extinction time of the charged particles between the lines, local display unevenness appears as a whole screen, and the image quality is degraded.

The problem is that an image signal of opposite polarity is applied to the discharge channel 9 for every one or a plurality of adjacent signal electrodes Y, and for the image signal applied to each signal electrode Y every frame period. The problem can be solved by using a driving method in which the polarity is inverted. In this drive system, the column
In order to invert the polarity of the image signal for each of the signal electrodes arranged in a row, this driving method is hereinafter referred to as column inversion driving.

In the column inversion drive, unlike the normal line inversion drive, the polarity of the image signal is not inverted every horizontal cycle of the discharge channel 9, so that even if the elimination time of the charged particles is long, the image of the opposite polarity is displayed. There is no danger of overwriting the signal, and a large write loss unlike the related art does not occur. Generally, the image signals adjacent to each other have almost the same signal voltage level due to the continuity of the image, and if the polarity is the same, a large write loss does not occur. It is possible to make it hard to receive. In addition, in the column inversion drive, since the polarity of the image signal is inverted for each column, when the entire image is viewed, the unevenness in brightness due to the difference in polarity is averaged, and the variation in brightness is suppressed. Therefore,
When the column inversion drive and the frame inversion drive are combined, flicker hardly occurs. Therefore, by performing the column inversion drive and the frame inversion drive together, the display cell 4 using the liquid crystal 11 as the electro-optical material can be completely AC-driven while suppressing flicker.

However, in the column inversion driving, a very large potential difference is generated between the signal electrodes Y whose polarity is inverted, so that a so-called crosstalk phenomenon peculiar to the plasma addressed liquid crystal display device is remarkably observed. For this reason, when performing the column inversion drive, the width of the black matrix between the pixels 12 provided in the color filter 13 is increased to prevent the crosstalk phenomenon. However, if the width of the black matrix between the pixels 12 is increased, the aperture ratio of the display cell 4 is reduced, which causes a reduction in the brightness of the image display.

The present invention has been made in order to solve the above-mentioned problem. When the column inversion drive and the frame inversion drive are performed together, the aperture ratio of a display cell is reduced to thereby reduce the display of an image. Without reducing brightness
An object of the present invention is to provide a plasma addressed liquid crystal display device capable of preventing a crosstalk phenomenon.

[0033]

In order to solve the above problems, a plasma addressed liquid crystal display device according to the present invention comprises a display cell having a plurality of signal electrodes each extending in a column direction, and a display cell each having a plurality of signal electrodes extending in a row direction. A plasma cell having a plurality of discharge electrodes is joined to each other, a discharge pulse is sequentially applied to each discharge electrode of the plasma cell to generate a plasma discharge, and a polarity is set for each of a plurality of adjacent signal electrodes. In the plasma addressed liquid crystal display device for applying the inverted image signal, the width of the black matrix that shields between the signal electrodes to which the inverted image signal is applied is formed in another portion between the signal electrodes. It is wider than the width of the black matrix, thereby achieving the above object.

It is preferable that the image signal having the inverted polarity is applied to each of three adjacent signal electrodes.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plasma addressed liquid crystal display according to the present invention will be described with reference to the drawings.

The plasma addressed liquid crystal display of the present embodiment has substantially the same configuration as the conventional plasma addressed liquid crystal display 1 described with reference to FIG. 5, and as shown in FIG. It has a flat panel structure in which a plasma cell 3 to be generated and a display cell 4 in which a liquid crystal 11 as a display medium is sealed are opposed to each other with an intermediate sheet 2 interposed therebetween.

Each plasma cell 3 has a plurality of discharge channels 9 each extending along the row direction. Inside each discharge channel 9, a pair of discharge electrodes 10 serving as a cathode K and an anode A are provided, respectively. Each of the display cells 4 is provided with a plurality of signal electrodes Y, each of which extends along the column direction. Each discharge channel 9 of the plasma cell 3 and the display cell 4
And each of the signal electrodes Y intersect each other in an orthogonal state,
The pixels 12 are formed in a matrix by the intersections.

The structure of the color filter 13 provided on the glass substrate 7 in the display cell 4 is different from the plasma addressed liquid crystal display device of the present invention. FIG. 1 is a schematic cross-sectional view illustrating the configuration of the color filter 13 provided in the display cell 4.

The display cell 4 of this plasma addressed liquid crystal display device has a color filter 13 provided on a glass substrate 7 as shown in FIG.
3, signal electrodes Y are provided along the column direction. For example, the signal electrodes Y are provided with a predetermined interval T1 ′ so as to be close to each other by three, and an interval T2 ′ larger than the interval T1 ′ is provided for each of the three signal electrodes that are close to each other. Have been. Also, color filter 1
3 are also arranged at intervals T1 or T2 similarly to the signal electrode Y, and a black matrix 34 is provided between adjacent color filters 13. Therefore, each of the black matrices 34 has a slightly larger width in consideration of a manufacturing alignment margin, and each of the black matrices 34 is disposed between three signal electrodes Y adjacent to each other.
One black matrix 34 has a width of T1 (80 μm), and one black matrix 34 arranged between every three adjacent signal wirings has a width of T2 (1
60 μm).

FIG. 2 is a schematic diagram for explaining the overall configuration and operation of the plasma addressed liquid crystal display of the first embodiment.

In each discharge channel 9 of the plasma cell 3, each cathode K0 to Kn and each anode A0 to An are provided. Each of the cathodes K0 to Kn is connected to the scanning circuit 31, and each of the anodes A0 to An
Is grounded. Also, each signal electrode Y of the display cell 4
0 to Ym are connected to the signal circuit 32. further,
The scanning circuit 31 and the signal circuit 32 are connected to a control circuit 33, and are controlled by the control circuit 33, respectively.

The scanning circuit 31 sequentially applies a discharge pulse to each of the cathodes K0 to Kn to excite a plasma discharge in the discharge channel 9 and sequentially selects the pixels 12 for each row (for each line). The signal circuit 32 applies an image signal to each of the signal electrodes Y0 to Ym, and writes the image signal to the pixels 12 of the row sequentially selected by the discharge channel 9. Control circuit 3
3 controls the scanning circuit 31 and the signal circuit 32 synchronously.

In the plasma addressed liquid crystal display device of the present embodiment, an image signal of opposite polarity is applied to each of the signal electrodes Y0 to Ym arranged along the column direction for every three electrodes. Column inversion drive is performed. At this time, the scanning circuit 31 rewrites the screen for each frame by repeating the sequential selection of the pixel rows every fixed frame period. In this case, the signal circuit 32 performs a so-called frame inversion drive by inverting the polarity of the image signal applied to each of the signal electrodes Y0 to Ym in each frame cycle.

The operation of performing the column inversion drive and the frame inversion drive together will be specifically described with reference to FIG.

As shown in FIG. 3, when viewed from above the plasma cell 3 and the display cell 4, each pixel 1 arranged in a matrix
2 is formed. Then, in a certain frame, as shown in FIG.
An image signal of the same polarity is applied to the signal electrodes Y, and the following 3
Image signals of the opposite polarity are applied to the signal electrodes of the book which are close to each other. That is, the first row, the second row, and the third row
Positive image signals are respectively written in the pixels 12 in the column, and in the pixels 12 in the fourth, fifth, and sixth columns,
A negative image signal is written. In addition, 7
Positive image signals are written to the pixels 12 in the eighth, ninth, and ninth columns, respectively.
A negative-polarity image signal is written to each of the pixels 12 in the second column.

In the next frame, as shown in FIG. 3B, an image signal with inverted polarity is written in each pixel column. That is, the image signal written to each pixel 12 is inverted for each frame, and so-called frame inversion driving is performed.

As described above, the black matrix 3 formed between the signal electrodes to which the image signals of different polarities are applied.
4 is formed wider than the black matrix 34 formed between the other signal electrodes, so that the pixel 12 on which the positive image signal is written and the pixel 12 on which the negative image signal is written Even if there is a difference in luminance between them, they are averaged when viewed as a whole screen, and are inconspicuous. Therefore, even when the frame inversion drive is performed, the flicker is hardly observed, and the display cell 4 can be driven by AC.

In the plasma addressed liquid crystal display device of the present embodiment, the column inversion drive is performed in which image signals of opposite polarities are applied to each of the three signal electrodes Y. As long as spatial averaging can be performed over this range, a configuration in which inversion driving is performed for every two signal electrodes Y or four or more signal electrodes Y may be used instead of this configuration.

However, when displaying a color image, the three primary color filters 13 of RGB are made to correspond to the three signal electrodes Y, respectively, and the inversion drive is performed for each of three signal electrodes Y corresponding to the three primary color filters of RGB. If the width of the black matrix 34 between the signal electrodes Y to be inverted is increased, the inequality of the width of the black matrix 34 can be made most inconspicuous, and the display quality is improved.

In general, in a plasma addressed liquid crystal display device, most of the image signal voltage applied to the signal electrode is consumed by the intermediate sheet, and the image signal voltage applied to the liquid crystal layer is reduced by 10 minutes of the original voltage. It has been found to drop to near 1. For this reason, the image signal voltage applied to the signal electrode is about 60 V to 80 V at the maximum.
Therefore, the maximum potential difference between adjacent signal electrodes is a signal to which a positive image signal is applied between signal electrodes where the polarity of the image signal is inverted, when the image signal voltage applied to each signal electrode is 60 to 80V. +60 to +8 for electrodes
Since 0 V is applied and -60 to -80 V is applied to the signal electrode to which the negative image signal is applied,
A very large potential difference of 120 to 160 V is generated between both signal electrodes. For this reason, a large crosstalk phenomenon occurs between the signal electrodes whose polarities are inverted, and it is necessary to increase the width of the black matrix to prevent the crosstalk phenomenon.

Therefore, in the column inversion drive in which the polarity is inverted for each signal electrode, it is necessary to increase the width of all the black matrices, and the aperture ratio of the display cells decreases.

On the other hand, an image signal is applied to the signal electrodes by column inversion driving for inverting the polarity of a plurality of lines, and the width of the black matrix between the signal electrodes for which the polarity is inverted is made larger than the width of the black matrix in other portions. By increasing the width, the disadvantage that the aperture ratio of the display cell decreases can be eliminated.

FIG. 4A is a waveform chart for explaining the operation of the plasma addressed liquid crystal display device of the present embodiment.

The signal waveform C shown in FIG. 4A shows an image signal applied to three signal electrodes (line 1, line 2, and line 3) when each of the signal electrodes Y0 to Ym is driven by column inversion. And the polarity of the applied image signal is not switched within one frame.

Therefore, the signal waveform C has the positive polarity data D 1, D 2 over line 1, line 2, and line 3.
2, D3 is applied. As described above, in column inversion driving, image data having the same polarity is always written in the same frame.

On the other hand, the signal waveform L shown in FIG. 4B shows three signal electrodes (line 1, line 2, and line 3) adjacent to each other when the signal electrodes Y0 to Ym are driven by line inversion. The line 1 is supplied with image data D1 of positive polarity, the line 2 is supplied with image data D2 of negative polarity, and the line 3 is supplied with image data D3 of positive polarity. I have.

As described above, the signal waveform C shown in FIG.
The polarity inversion of the signal waveform L shown in FIG. Since the polarity of the signal waveform C shown in FIG. 4A is lower than that of the signal waveform L shown in FIG. 4B, the power consumption of the signal circuit can be reduced accordingly.

A voltage waveform 1 shown in FIG. 4C represents a discharge voltage supplied from the scanning circuit 31 to the cathode K of the line 1 to which the signal voltage has been applied. As shown in FIG. 4C, a negative voltage of several hundred V is applied to the cathode K of the line 1.
By applying a pulse P1 of the order, a plasma discharge is excited. This plasma discharge causes line 1
The charged particles generated by the plasma discharge in the discharge channel 9 of the pixel 12 corresponding to
Is selected, and the image data D1 is written to the pixel 12.

Since the charged particles generated by the plasma discharge in the discharge channel 9 remain even after the voltage pulse P1 is released, the plasma switch is not completely shut off. A curve indicated by W1 in FIG. 4C represents a process of extinguishing charged particles generated by plasma discharge in the discharge channel 9. This curve W1 represents a case where the decay is long, and the time remaining until the remaining charged particles completely disappear, exceeding the time allotted to the line 1 and the line 2
The time allotted to. In this case, FIG.
In the line inversion drive shown in (b), after the positive polarity image data D1 is written in the line 1, the negative polarity image data D2 is overwritten in the line 2. This allows
A large write loss will occur.

On the other hand, in the column inversion drive shown in FIG. 4A, after the positive image data D1 is written in the line 1, the positive image data D2 is also overwritten in the line 2. In this case, in consideration of the continuity of the screen, the image data D1 and the image data D2 often have substantially the same voltage level, and are temporarily indicated by a curve W1 representing a process of disappearing charged particles. Thus, even if the decay is long, the effect of the overwriting hardly occurs. Also,
Overwriting image data of the same polarity and of the same level has no substantial effect.

Next, as shown in FIG. 4D, a voltage waveform 2 is applied to the cathode K2 of the line 2. That is,
A pulse P2 of about minus several hundred volts is applied to the cathode K2, and a plasma discharge occurs in the discharge channel 9 of the line 2. The resulting decay of the charged particles is represented by curve W2. There is variation in the decay of the disappearance of the charged particles between the lines, and FIG. 4D shows a case where the curve W2 is shorter than the curve W1. That is, in the line 2, the plasma discharge of the discharge channel 9 is completed within the allocated horizontal cycle, and the normal image signal D2 can be written in both the line inversion drive and the column inversion drive.

As described above, if there is a variation in the decay of the disappearance of the charged particles between the lines, the presence or absence of the overwriting indicates
Display unevenness will occur. It can be seen that in the line inversion drive, the display unevenness is conspicuous, whereas in the column inversion drive, there is almost no influence.

As described above, according to the plasma addressed liquid crystal display of the present embodiment, since the image signal voltage is applied to the signal electrodes Y0 to Ym by the column inversion drive, the discharge channel 9 is charged by the plasma discharge. Even if the decay to the disappearance of the particles was long,
Voltage loss of an image signal written to each pixel 12 can be suppressed. In particular, when displaying a uniform image over the entire screen, suppression of the voltage loss of the image signal is effective. Further, even if the decay until the disappearance of the charged particles due to the plasma discharge in the discharge channel 9 is not uniform among the signal electrodes, display unevenness can be avoided. Furthermore, in the column inversion drive, the polarity inversion speed of the image signals of the signal electrodes Y0 to Ym can be reduced as compared with the case of the normal line inversion drive, so that the power consumption can be reduced.

In the column inversion drive having the above advantages, the crosstalk phenomenon is remarkable because the potential difference between the signal electrodes to which the image signals having different polarities are applied becomes large. In the address liquid crystal display device, since the width of the black matrix formed between the signal electrodes where the image signals are inverted is made larger than that of the other portions of the black matrix, the crosstalk phenomenon can be prevented. Further, since the width of the black matrix is not increased for the black matrix between all the signal electrodes, a decrease in the aperture ratio of the display cell due to the increase in the width of the black matrix can be suppressed, and a bright image can be displayed on the display panel. Can be provided.

[0065]

As described above, according to the present invention,
The crosstalk phenomenon occurs because the width of the black matrix that blocks light between the multiple signal electrodes to which the image signal with inverted polarity is applied is wider than the width of the black matrix formed between the other signal electrodes. Can be prevented. Further, since the width of the black matrix is not increased for the black matrix between all the signal electrodes, it is possible to suppress a decrease in the aperture ratio of the display cell due to the increase in the width of the black matrix. A bright image display can be provided on the panel.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a display cell unit of a plasma liquid crystal display device according to the present invention.

FIG. 2 is a schematic diagram showing the configuration and operation of a plasma addressed liquid crystal display device according to the present invention.

FIG. 3 is a schematic diagram illustrating column inversion driving of the plasma addressed liquid crystal display device of the present invention.

FIG. 4 is a waveform chart for explaining the operation of the plasma addressed liquid crystal display device of the present invention.

FIG. 5 is a sectional view showing a configuration of a conventional plasma addressed liquid crystal display device.

FIG. 6 is a schematic diagram for explaining an operation of a conventional plasma addressed liquid crystal display device.

FIG. 7 is a schematic diagram for explaining frame inversion driving.

FIG. 8 is a schematic diagram for explaining line inversion driving.

[Explanation of symbols]

 Reference Signs List 2 intermediate sheet 3 plasma cell 4 display cell 5 glass substrate 6 sealing material 7 glass substrate 8 partition 9 liquid crystal 10 discharge electrode A anode K cathode 11 liquid crystal 12 pixel 13 color filter 14 backlight 31 scanning circuit 32 signal circuit 33 control circuit 34 black Matrix Y0-Ym Signal electrode K0-Kn Cathode A0-An Anode

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme court ゛ (Reference) G09G 3/20 611 G09G 3/20 611D 5C094 621 621B 624 624B 3/36 3/36 (72) Inventor Hayashi Shoken 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo F-term (reference) in Sony Corporation 2H089 HA36 QA11 QA16 RA18 TA07 TA13 2H091 FA35Z FC01 GA11 LA11 LA16 LA30 2H093 NA20 NA80 NC22 NC23 ND15 5C006 AA22 AC26 AC28 AF42 AF43 AF44 BB18 BC03 BC12 FA23 FA34 FA36 FA47 5C080 AA10 BB05 CC03 DD10 DD26 FF11 JJ02 JJ04 JJ06 5C094 AA09 AA10 BA43 CA19 CA24 DA13 EA04 EA07 EB02 ED03 ED15

Claims (2)

[Claims] 1. A display cell having a plurality of signal electrodes along a column direction and a plasma cell each having a plurality of discharge electrodes along a row direction are joined to each other, and each of the plasma cells is A plasma addressed liquid crystal display device in which a discharge pulse is sequentially applied to a discharge electrode to generate a plasma discharge and to apply an image signal whose polarity is inverted for each of a plurality of adjacent signal electrodes, wherein the image signal having the inverted polarity is provided. A width of a black matrix that blocks light between signal electrodes to which the black matrix is applied is wider than a width of a black matrix formed in another portion between the signal electrodes. 2. The plasma addressed liquid crystal display device according to claim 1, wherein the image signal having the inverted polarity is applied to each of three adjacent signal electrodes.