JPH0350493Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a color liquid crystal display device comprising a transparent color filter incorporated in a liquid crystal layer.

<Prior Art> Conventionally, various types of color liquid crystal display devices have been proposed that incorporate translucent three primary color filters in a liquid crystal layer and perform full color display by applying the principles of a color television. FIG. 1 shows a schematic configuration of a conventional color liquid crystal display device of this type. In the same figure, A is a TN (twisted nematic) type, and B is a TN (twisted nematic) type.
are of the GH (guest host) type and are shown separated from each other. 1 and 1' are upper and lower glass substrates facing each other, 2 and 2' are transparent conductive films arranged in a matrix structure, 3 is a light-transmitting color filter layer attached in a band shape on the transparent conductive film 2, 4, 4' is an insulating layer for liquid crystal molecule alignment, 5 is a liquid crystal, 6 is a dye,
7 and 7' are polarizing plates. The polarizing plates 7, 7' are TN
If it is a type liquid crystal, two pieces are placed on the top and bottom, and if it is a GH type liquid crystal, one piece is placed on the upper side. liquid crystal molecules
Both the TN type and GH type have a 90 degree twisted orientation between the upper and lower glass substrates 1 and 1', and the polarizing plates 7 and 7'
The polarization directions of the liquid crystal molecule alignment insulating layers 4 and 4' are respectively
The direction is set to be approximately perpendicular to the long axis direction of the liquid crystal molecules that are in contact with the liquid crystal molecules. The above color filter layer 3
The configuration is as shown in FIG. In the same figure, R,
B and G are red, blue, and green color filter layers deposited on the transparent conductive film 2, respectively, and the color filter layers R, B, and G are arranged in a band shape.
8 in FIG. 2 indicates one pixel, and this one pixel 8 is a unit for displaying each color of the color filter layers R, B, and G and a mixed color thereof.

<Purpose> The present invention is based on the configuration of the conventional color liquid crystal display device described above, and further develops it to obtain a new color liquid crystal display device, which is particularly suitable for displaying analog information such as bar graph displays. The object of the present invention is to provide a new and useful color liquid crystal display device that can perform the following functions.

<Example> Hereinafter, an example of the color liquid crystal display device according to the present invention will be described in detail with reference to the drawings.

FIG. 3 is a structural explanatory diagram showing the shapes of electrodes and color filter layers of an embodiment of a color liquid crystal display device according to the present invention. Components other than those shown in FIG. 1 may be the same as those shown in FIG. In the figure, 9 and 10 are comb-shaped upper electrodes (first and second comb-shaped electrodes) made of a transparent conductive film, and 11 is a lower electrode made of a transparent conductive film. Lower electrode 1
1 faces the upper electrodes 9 and 10 with a gap in which the liquid crystal is inserted, and is laid in a striped pattern in a direction perpendicular to the comb tooth direction of the upper electrodes 9 and 10.
Reference numerals 12 and 13 denote translucent color filters of different colors attached to the comb-shaped upper electrodes 9 and 10, respectively. The electrodes in the figure constitute pixels among the electrodes of the entire display device, and in reality, a large number of electrodes identical to the electrodes in the figure are arranged in a direction perpendicular to the teeth of the comb-shaped upper electrodes 9 and 10. ing.
In this electrode structure, a driving voltage is applied independently to one upper electrode 9 and the other upper electrode 10, and the potential difference between the upper electrodes 9, 10 and the lower electrode 11 to which the driving voltage is applied is applied. A color display pattern can be obtained by optical shutter operation using the electric field effect of the liquid crystal. That is, four strip electrodes 9a, 9b, 9 corresponding to the teeth of the comb-shaped upper electrode 9
A pixel of a predetermined color (for example, red) is obtained by energizing the electrodes c and 9d, and four strip electrodes 10a, 10b, 1 corresponding to the teeth of the comb-shaped upper electrode 10 are
Pixels of other colors (for example, blue) are obtained by energizing 0c and 10d, and the four strip electrodes 9a, 9b, 9c, 9d, and 1 of the comb-shaped upper electrodes 9 and 10 are
The above 2 is achieved by energizing 0a, 10b, 10c, and 10d.
Get a pixel of a mixed color (for example purple). According to the above configuration, since the upper electrode 9 and the upper electrode 10 are engaged with each other, the pixel position hardly changes even when the three colors are switched. Therefore, when configuring various patterns in the entire display, the continuity of each pixel in each display pattern is good, and a clear display can be obtained. Furthermore, in the case of displaying a mixed color, since a plurality of strip electrodes of different colors are alternately arranged in the same pixel, the mixed color becomes very clear.

FIG. 4 is a structural explanatory diagram showing the shapes of electrodes and color filter layers of another embodiment of the color liquid crystal display device according to the present invention. The configuration other than the configuration shown in FIG. 1 may be the same as that in FIG. 1. In the figure, 14 and 15 are comb-shaped upper electrodes made of a transparent conductive film;
Reference numeral 6 denotes a meandering upper electrode made of a transparent conductive film, 17 a lower electrode made of a transparent conductive film, 18, 19, and 20 the comb-shaped upper electrodes 14, 15 and the meandering part. Upper electrode 16 of the shape
Transparent filters of different colors are attached on top. The electrodes in the figure constitute pixels in the entire electrode, and in reality, a large number of electrodes having the same structure as in the figure are arranged in a direction perpendicular to the teeth of the comb-shaped upper electrodes 14 and 15. In this electrode structure,
By using the transparent filters 18, 19, 20 of different colors attached to the comb-shaped upper electrodes 14, 15 and the serpentine-shaped upper electrode 16, it is possible to obtain each color and a combination thereof. This allows more types of colors to be displayed than in the case of Fig. 3.

<Effects> According to the present invention, particularly good color display can be obtained in analog display, and the first comb-shaped electrode and the second comb-shaped electrode, which have color filters of different colors, mesh with each other. Since pixel electrodes having a matching structure are arranged and multicolor display is performed in units of pixel electrodes, excellent effects are obtained in terms of continuity of display patterns and clarity of mixed colors.

[Brief explanation of the drawing]

FIG. 1 is a structural explanatory diagram of a conventional color liquid crystal display device, FIG. 2 is a structural explanatory diagram showing the electrode structure of a conventional color liquid crystal display device, and FIG. 3 is an example of a color liquid crystal display device according to the present invention. FIG. 4 is an explanatory diagram showing the configuration of the electrodes and color filter layer of another embodiment of the color liquid crystal display device according to the present invention. In the figure, 1, 1': glass substrate, 2, 2': transparent conductive film, 3: color filter layer, 4: 4': insulating layer for liquid crystal molecule alignment, 5: liquid crystal, 6: dye, 7,
7': Polarizing plate, 8:1 pixel, 9, 10, 14, 1
5: Upper electrode, 11, 17: Lower electrode, 12, 1
3, 18, 19, 20: Transparent filter, 1
6: Upper electrode.

Claims (1)

[Scope of utility model registration request] a pixel electrode array constituted by first and second comb-shaped electrodes that mesh with each other;
a striped counter electrode overlapping the comb-shaped electrode and laid in a direction substantially perpendicular to the comb-shaped electrode;
a first color filter formed in the comb-teeth area of the first comb-teeth electrode; and a first color filter having a different hue from the first color filter and formed in the comb-teeth area of the second comb-teeth electrode. a second color filter; a power supply means for independently applying a voltage to the first comb-shaped electrode and the second comb-shaped electrode to select a display color; and a second color filter; A field effect type, which is interposed in a gap between a tooth-shaped electrode and the counter electrode, and is driven by a voltage between one or both of the comb-shaped electrodes and the counter electrode to generate a display pattern in units of the pixel electrodes. A color liquid crystal display device comprising: a liquid crystal;