JPS60260921A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To make observation of a colored display pattern having a uniform pattern width from any directions possible, by setting and arranging the stripe direction of each stripe filter formed on segment electrodes in one direction. CONSTITUTION:A set of segment electrodes 3 to be formed on an upper substrate 1 is formed by dividing it into segment electrodes 3a having a larger pattern width and those 3b having a smaller pattern width and blue and green stripe filters 5b and 5g are formed on the electrodes 3a, and then, red stripe filters 5r are formed on the smaller electrodes 3b. Thus each color filter 5b, 5g, and 5r is repeatedly formed in the same longitudinal direction extending over all the segments a-f. On a lower substrate 2 common electrodes 4a having a smaller pattern width are formed correspondingly to the blue filter 5b and those 4b having a wider pattern width are formed as opposed to the green and red filters 5g and 5r. By appropriately combining these electrodes 3a, 3b, 4a, and 4b and impressing a prescribed voltage, a display having a uniform pattern width is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a color display liquid crystal display device in which a color filter is formed on an electrode surface.

[Background of the invention]

Conventionally, in a liquid crystal display device equipped with a color filter, color filters are disposed on the front and rear surfaces of a liquid crystal display element, as disclosed in, for example, USP No. 3,840,695.
A method has been proposed in which a color display pattern of only one color is obtained for each location.

However, in such liquid crystal display devices, no technology has been recognized for displaying the same pattern in various different colors.

FIG. 1 is a cross-sectional configuration diagram of essential parts showing an example of a color liquid crystal display device (unpublished) that displays the same pattern in a plurality of different colors. In the figure, segment electrodes 3 and common electrodes 4 made of transparent conductive films are formed on opposing surfaces of upper and lower substrates 1 and 2 made of transparent glass plates, respectively, and on these segment electrodes 3 Stripe filters 5b, 59, and 5r of three colors of blue, green, and red are repeatedly arranged in order, and above n et al.
The lower substrates 1.2 are separated from each other by a predetermined distance and their peripheral parts are sealed with a sealing material 6 containing a spacer to form an envelope.
mat ic) Liquid crystal display element 8 is sealed by enclosing liquid crystal T.
is configured. Moreover, the outer surface of this liquid crystal display element 8,
That is, upper and lower polarizing plates 9 and 10 are disposed on the outer surfaces of the upper and lower substrates 1 and 2 so that their polarization axes are parallel to each other, thereby configuring a color liquid crystal display device.

For example, in the case of blue display, the color display liquid crystal display device configured as described above can be used by applying a predetermined voltage between the segment electrode on which the blue stripe filter 5b is superimposed and the common electrode! I) By changing the optical properties of the TN liquid crystal T, that is, by transmitting the light incident on the liquid crystal portion corresponding to the blue stripe filter 5b, it can be recognized as a blue display pattern from the upper substrate 1 side. .

Furthermore, a green display pattern and a red display pattern can be displayed in the same manner. Furthermore, white display can be achieved by simultaneously applying a predetermined voltage between the segment electrodes and common electrodes corresponding to the blue stripe filter 5b, the green stripe filter 5t, and the red stripe filter 5r. In this way, many colors can be displayed by combining each color.

FIG. 2 is a plan view of essential parts of the color liquid crystal display device shown in FIG. 1, and the same reference numerals in FIG. 1 indicate the same parts. In the same figure, the segment electrode 3 is formed in the shape of a dovetail 8, and the segments a, f, and d are each striped filter sb J 5.
r + 5r laterally, and segments b, e, e,
f is each stripe filter 5 b + 5 f + 5
As shown in the enlarged plan view of FIG. 3, the cylindrical portions r are repeatedly formed and arranged in the longitudinal direction. For this reason, when observing the pattern display at a certain angle θ from a direction diagonally below the color display liquid crystal display device as shown in FIG.
When the letter-shaped segment 3 is displayed in red, for example, the segments b, c, where the stripe filter 5r is located in the vertical direction are
For e and f, the width W of the red stripe filter 5r does not change, but for the segments a, f, and d arranged in the horizontal direction, the width W of the red stripe filter 5r depends on the angle θ between the viewing direction and the surface of the upper substrate 1, and WglfI
Therefore, compared to the former, the red display of the red stripe filter 5r of the criminal is not light, and the force 2 - the color shading occurs in the vertical and horizontal directions of the display pattern.1. □There was a problem.

[Purpose of the invention]

Therefore, the present invention has been made in view of the above-mentioned problems, and its purpose is to make it possible to observe a display pattern that has a uniform pattern width no matter which direction the display surface is viewed from. The objective is to provide a liquid crystal display device that can.

[Summary of the invention]

In order to achieve such an object, the present invention arranges the stripe filters formed on the segment electrodes with the stripe direction set in one direction.

[Embodiments of the invention]

Next, embodiments of the present invention will be described in detail using the drawings.

FIG. 5 is an enlarged plan view of a main part of a segment electrode for explaining one embodiment of a color liquid crystal display device according to the present invention. In the figure, stripe filters 5b of each color are placed on the segment electrode 3 over all of the segments a, b, c, d, @, f. M' and 5r are formed repeatedly in the same longitudinal direction. Moreover, stripe filters 5b, 51i', 5 of each of these colors
As shown in the enlarged cross-sectional view of main parts in FIG. A blue stripe filter 5b and a green stripe filter 5 are formed on the first segment electrode aIL.
A red stripe filter 5r is formed on the second segment electrode 3b, and a first common electrode with a small pattern width C is formed on the lower substrate 2 facing the blue stripe filter 5b. 4a, and a green stripe filter y and a red stripe filter 5r.
A second common electrode 4b having a large pattern width is formed on the lower substrate 2 facing the first segment electrode 3a and the second common electrode 4b.
segment electrode 3b and first common electrode 4a.

A desired color display pattern can be selected by applying a predetermined voltage in appropriate combinations with the second common electrode 4b.

According to such a configuration, each color stripe filter 5
b+5? By unifying the stripe direction of + 5 r to be vertically arranged in each segment a, b, c, , e, f, f, a uniform pattern with no difference in shading can be obtained no matter which direction it is observed. A color display pattern with width is obtained.

In the embodiment described above, the stripe filters 5b of each color are formed on the segment electrodes.

! Although a case has been described in which the stripe directions of M' and 5r are unified in the vertical direction, the present invention is not limited to this. Of course, the same effect can be obtained even if the directions are unified in the horizontal direction or in the diagonal direction.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to obtain a color display pattern having a uniform pattern width with no difference in shading even when observed from any direction, so that a color display liquid crystal display device with high quality and reliability can be obtained. This provides an extremely excellent effect of providing the following.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams for explaining an example of a color display liquid crystal display device that has been proposed in recent years (unpublished), and Figure 5
The figure is an enlarged plan view of a main part showing a segment electrode for explaining one embodiment of a liquid crystal display device according to the present invention, and FIG. 6 is an enlarged sectional view of the main part. 1...upper board, 2...lower board, 3...segment tE&, 3a...first segment)! very,
3b...Second segment electrode, 4.Fist...Common N pole, 4a...@first common electrode, 4b-...
Common electrode of 抛2, 5b・Φ・・Blue stripe filter, 51 ・・・・Green stripe filter, 5r・
-・φ red stripe filter, 6...φ sealing material,
7.1...TN liquid crystal, 8...Liquid crystal display element, 9...
・・Top polarizing plate, 10・・・Lower polarizing plate. Figure 1 Figure 5

Claims (1)

[Scope of Claims] Light-transmitting upper and lower substrates arranged to face each other, and segment electrodes formed on the opposing surfaces of the two substrates. At least a common electrode, a plurality of color stripe filters formed on at least one of the two electrodes, and a liquid crystal sealed between the side substrates, and the stripe direction of the plurality of color stripe filters is oriented in one direction. A liquid crystal display device characterized by being set to .