JPS5822750B2 - lcd matrix panel - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid crystal matrix panel, and particularly to a liquid crystal matrix panel.
The present invention relates to a liquid crystal matrix panel formed with an electrode pattern suitable for use in image display devices.

An example of a conventional liquid crystal matrix panel is shown in FIG.

A gap of 10 to 20 .mu.m is provided between the two electrode plates 1 and 2 and liquid crystal is sealed therein to form a liquid crystal layer 3, and the periphery thereof is sealed with a sealant 4.

At this time, glass plates are mainly used as the substrates of the electrode plates 1 and 2, and striped row electrodes 5 and column electrodes 6 are formed inside them.

A transparent conductive film is used for the electrodes 5 and 6.

When driving such a liquid crystal matrix panel to display characters and images, a line sequential scanning method is generally used.

On the other hand, dynamic scattering liquid crystals and field effect liquid crystals, etc.
It is known that the brightness of a display surface depends on the effective voltage, which is the effective value of the voltage applied to the liquid crystal layer.

In a liquid crystal matrix panel with such characteristics, when increasing the size of the matrix panel and displaying many characters and images, the number of row electrodes increases by 1, that is, the number of scanning lines increases, and the operation becomes difficult. It is said that the margin becomes smaller, resulting in disadvantages such as a decrease in contrast or an increase in display quality.

By adopting a multi-matrix structure, the present invention provides a liquid crystal matrix that enables display of more characters and images without excessively increasing the number of row electrodes or scanning lines.
There are panels to provide.

The present invention is characterized in that the row electrodes of the other electrode group are formed using a transparent conductive film, the one electrode group uses a thin metal film for the column electrodes, and the pixel electrodes made of transparent electrodes are formed using the metal film. In addition, one row electrode corresponds to a plurality of rows of pixel electrodes, resulting in a multi-matrix structure.

With this configuration, the number of rows of pixel electrodes can be increased without excessively increasing the number of scanning lines, making it possible to display more characters and images.

FIG. 2 shows an embodiment of the invention comprising a dual matrix structure.

Row electrodes 9 are formed on one of the two electrode plates 1' and 2', and this is used as a transparent electrode.6 Column electrodes 10 and 11 are provided on the other electrode plate 1', and these are made of metal. Use as an electrode.

Pixel electrodes 12 and 13 are connected to the column electrodes 10 and 11, and are used as transparent electrodes.

One row electrode 9 is opposed to pixel electrodes 12 and 13 connected to column electrodes 10 and 11.

That is, two rows of pixel electrodes face each other.

Therefore, if one row electrode includes pixel electrodes for two rows, and the row electrode is a scanning line of a line sequential scanning method, two rows of pixels will be included on one scanning line.

Therefore, it is possible to drive with a number of scanning lines that is half the number of pixel rows.

At this time, the row electrode 9 and the pixel electrodes 12 and 13 are transparent electrodes, and light is transmitted from the back surface to the front surface of the matrix panel.

That is, the shape becomes a transmissive panel as it is, and by providing a reflector or a diffuser on the back surface, it becomes a reflective panel.

Further, when the column electrodes and pixel electrodes are enlarged and the portion facing one row electrode is shown, the result is as shown in FIG.

Since it is necessary to use narrow width lines for the column electrodes 10 and 11, it is necessary to use a metal film with as small a sheet resistance as possible.

For example, gold, silver, aluminum, copper, nickel, etc.

At this time, the pixel electrodes 12 and 13 have a structure in which they are alternately connected to the column electrodes 10 and 11, respectively.

The liquid crystal matrix panel having the structure shown in FIG. 3 and its driving circuit are represented as an equivalent circuit as shown in FIG. 4.

Row electrodes 9 are isometrically designated row electrodes 9-1 and 9-2;
They are simultaneously driven by the row electrode drive circuit 24.

From this figure, it is clear that it has a double matrix structure.

That is, the row electrode 9-1 and the column electrode 10 constitute a first matrix, and the row electrode 9-2 and the column electrode 11 constitute a second matrix.

Pixel 12 belongs to the first matrix and pixel 13 belongs to the second matrix.

That is, pixels in odd rows belong to the first matrix, and pixels in even rows belong to the second matrix I-IJ.

Therefore, the row electrode drive circuit 24 simultaneously scans the first matrix and the second matrix I-IJ and drives them in a line sequential scanning manner.

At this time, the column electrode drive circuit 25 simultaneously applies signals to the pixels in the -th and second rows, for example, the pixels 12 and 13, through the column electrodes 10.11.

As a result, the number of scanning lines is 1/2 of the number of pixel rows, and the first
The same number of pixels as the conventional liquid crystal matrix panel shown in the figure
When driving the IJ, the number of scanning lines can be halved.

- That is, more characters and images can be displayed with the same number of scanning lines.

Therefore, when trying to display more characters/pixels, the number of scanning lines increases, the operating margin decreases, and the disadvantages such as decreased contrast or display unevenness are prevented, and the scale of the liquid crystal matrix panel is reduced. Can be made larger.

Further, according to this embodiment, as shown in FIG. 3, the pixel electrode 1
Column electrode 10.11 connected to pixel electrode 1
Provided on both sides of 2 and 13.

When the column electrodes 10 and 11 are arranged side by side on one side of the pixel electrodes 12 and 13, the column electrodes 10 and 11 intersect for connection with the pixel electrodes, and it is necessary to provide an insulating film or the like at the intersection for insulation. There is.

According to this embodiment, the column electrodes 10.11 are the pixel electrodes 12,
Since the column electrodes 10 and 13 are provided on both sides of the electrode 13, the column electrodes 10 and 11 do not cross each other, and there is no need to provide an insulating film or the like, which facilitates manufacturing.

Furthermore, since the row electrodes 9 facing the two rows of pixel electrodes are integrated, there is no need to form fine patterns, and the manufacture of the row electrodes becomes easier.

Furthermore, since the row electrodes 9 are integrated, the number of row electrodes is halved compared to the conventional example, and the number of connection points for the row electrodes with external circuits etc. is halved, making wiring connections easier.

Furthermore, the pixel electrodes 12.13 and the integrated row electrodes 9
Since the pixel is formed in the part facing the base 1', 2'
Even if the positioning accuracy is low, the pixel size will not change and the image will not deteriorate.

Since such a double matrix structure can be expanded to a multiple matrix structure, the scale of the liquid crystal matrix panel can be increased.

FIG. 5 shows a set of column electrodes 26, 27, 28° 29 and pixel electrodes 30, 31, 32, 33 facing one row electrode in a quadruple matrix structure.

That is, one row electrode includes four rows of pixel electrodes, and the number of scanning lines is 1/4 of the number of pixel rows.

Also in FIG. 5, the column electrodes 26 and 27 are provided on both sides so as to sandwich the pixel electrodes 30.31 and the column electrodes 28.29 and 32.33, respectively. , has been.

In order to insulate the column electrodes 26 and 27 and the column electrodes 2': 8 and 29, it is necessary to provide insulating parts 3s and 3sj.
．． The number of insulating parts is smaller than when provided on one side of 32, 33, the probability of occurrence of defects such as pinholes is reduced, and manufacturing becomes easier.

As described above, according to the present invention, a plurality of rows (m rows) of pixel electrodes face one row electrode due to the multiple matrix structure, and the row electrode can be used as a scanning line to drive in a line sequential scanning method. Therefore, the number of scanning lines is 1 of the number of pixel rows.
/m.

Therefore, the size of the matrix can be increased without reducing the operating margin, resulting in a decrease in contrast, or display unevenness, making it possible to display more characters and images using a liquid crystal matrix panel. In addition, the number of connection points with external circuits and the like at the row electrodes is reduced, making wiring connections easier and making it easier to form the row electrodes.

・Brief explanation of the drawings Figure 1 is a sectional view and plan view showing the structure of a conventional liquid crystal matrix panel, and Figure 2 is a plan view showing the structure of an embodiment of the liquid crystal matrix panel of the present invention. , Figure 3 is the second
FIG. 4 is a schematic diagram illustrating one driving method of the liquid crystal matrix panel of FIG. 2, and FIG. 5 is a diagram showing another embodiment of the present invention.

Explanation of symbols, 1', 2'... Electrode plate, 9.
... Row electrode, 10.11 ... Column electrode, 1
2,13...Pixel electrode.

Claims (1)

[Claims] 1. One electrode group and the other electrode group are provided on opposing surfaces of a pair of substrates so as to face each other, and a liquid crystal is held between the substrates,
In the case where the pixels formed by the opposing portions of the one electrode group and the other electrode group and the liquid crystal located between them form a matrix as a whole, the one electrode group is arranged in a matrix. It has a pixel electrode and m column electrodes (m≧2) provided for each column of the pixel electrode, and the other electrode group is an integrated electrode that faces and straddles the pixel electrodes in m adjacent rows. 1. A liquid crystal matrix panel characterized in that m rows of pixel electrodes facing one row electrode are respectively connected to m different column electrodes for each column. 2. A liquid crystal matrix panel according to claim 1, wherein m column electrodes connected to one column of pixel electrodes are provided on both sides of the pixel electrode. 3 In claim 1 or 2, it is stated that one of a pair of substrates is provided with only one electrode group, and the other substrate is provided with only the other electrode group. Characteristic liquid crystal matrix panel.