JPH023531Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a polarizing plate for multicolor display, more specifically, a polarizing plate for multicolor display consisting of a multicolor polarizing element and a transparent substrate holding it. The present invention relates to a polarizing plate for multicolor display in which a polarizing element has multicolor display sections with different polarization axes.

In general, a polarizing plate is made of a polymeric material such as polyvinyl alcohol or cellophane, which adsorbs iodine or dye, and stretches and aligns it in a certain direction to form a polarizing element, with fibers such as cellulose acetate on both or one side of the polarizing element. It is configured to adhere and hold a transparent substrate such as base resin, acrylic resin film, or glass to stably protect polarization.

By placing such polarizing plates on the top and bottom or on both sides of an electrode cell filled with liquid crystal so that their polarization axes are perpendicular to each other, a desired monochromatic pattern display such as a numerical display based on the difference in brightness and darkness can be produced depending on the presence or absence of an applied voltage. Although liquid crystal display devices that display such images are widely known, there have been complaints that the hue is a monochromatic pattern that tends to flow monotonously, lacks aesthetic appeal, and cannot display colorful and mobile patterns. Developed a polarizing plate for multicolor display and its manufacturing method, and published Utility Model Application Publication No. 15549/1983, Japanese Patent Application Publication No. 18685/1983, and Japanese Patent Application Publication No. 1983/1989.
-It has already been disclosed in Publication No. 11308, etc.

However, the polarizing plates for multicolor display that have been proposed so far have their polarization axes in the same direction over the entire surface, and even when used in combination with a polarizing plate attached to a liquid crystal cell, the display on a single display surface is There is a problem in that each display is limited to either a positive display or a negative display consisting of a specific hue.

The present invention has been developed in view of this problem, and it is an object of the present invention to provide a polarizing plate that can simultaneously display a positive display having two or more hues and a negative display on the same display surface.

The present invention will be explained below based on drawings showing embodiments. Figure 1 shows that one section of the transparent polarizing element 1 has a hue of A.
A colored polarizing film 2 formed with colored polarizing zones consisting of
and hues B, C and D in one section of the transparent polarizing element 3.
The polarizing axis of each colored polarizing film 2 and 4 is approximately
Both sides of a transparent substrate 5 are pasted in different orientations of 90 degrees, avoiding overlapping of colored parts as much as possible, and similar transparent substrates 6 and 7 are pasted on the outer surface of each colored polarizing film for protection. It is. Figure 2 shows colored polarizing films 2 and 4 in Figure 1.
and are directly attached to each other so that their polarization axes are in different directions of about 90 degrees, avoiding overlapping of the colored parts as much as possible, and then their outer surfaces are attached to transparent substrates 6 and 7, respectively, as in Fig. 1. It is protected.

FIG. 3 is almost the same as FIG. 2, but colored polarizing films 2 and 4 are laminated on one side of a transparent protective substrate 6.

In FIG. 4, colored polarizing films 2 and 4 are bonded to both sides of a transparent protective substrate 5.

The polarizing plates for multicolor display shown in Figures 1 and 2 are used for applications that require high durability, and the polarizing plates for multicolor display shown in Figures 3 and 4 are used for commonly used thin plates. Ru.

In the above configuration, the intersecting angle of the polarization axes of the two colored polarizing films 2 and 4 is not limited to 60°, but is dependent on the polarization angle of the colored polarizing film itself and the angle at which the polarizing plate is attached to the liquid crystal plate. It can be selected as appropriate by considering the following. Furthermore, when colored polarizing films are superimposed, there is no particular problem depending on the application even if some of the colored portions overlap each other. Furthermore, the hue divisions of the colored polarizing film can be formed in desired positions and shapes using known printing or transfer methods, so that the hue zones of the colored polarizing film can be formed in desired positions and shapes.
It is not limited to striped colored polarized bands such as B, C, and D, but can be printed in multiple colors in any pattern such as letters, figures, and patterns.

By using the multicolor polarizing plate of the present invention as described above in combination with a polarizing plate attached to the front or back surface of a liquid crystal cell, a section where the polarization axes of the polarizing plate are orthogonal or intersect and a section where the polarization axis is parallel are formed. It is possible to display a positive display in orthogonal or intersecting sections and a negative display in parallel sections, respectively, on the same display board. Currently, there are no known polarizing plates for multicolor displays that can simultaneously form both positive and negative displays on the same display board, and they are suitable for displaying various measuring instruments such as automobiles, electronic computers, and watches. When used on boards, it has a remarkable effect that is expected to be applied to new uses aiming at special display effects, such as using caution displays, warning displays, etc., counting or measurement displays, positive displays and negative displays.

[Brief explanation of the drawing]

1 to 4 are cross-sectional views showing an embodiment of a polarizing plate for multicolor display according to the present invention. 1, 3... Transparent polarizing element, 2, 4... Colored polarizing film, 5, 6, 7... Transparent substrate, A, B, C, D...
...Hue.

Claims (1)

[Claims for Utility Model Registration] (1) A polarizing plate for multicolor display consisting of a polarizing element having multicolor polarization hue divisions and a transparent substrate holding the polarizing element, wherein the polarizing element is one of the transparent polarizing elements. It is composed of two colored polarizing films in which monochromatic or multicolored colored polarizing regions are formed, and is bonded together so that the polarization axes of the two colored polarizing films are in different directions. Characteristic polarizing plate for multicolor display. (2) Utility model registration claim 1, in which the two colored polarizing films are bonded together with a transparent substrate in between.
A polarizing plate for multicolor display as described in . (3) The polarizing plate for multicolor display according to claim 1 or 2, wherein the two colored polarizing films are bonded together so that their polarization axes are oriented in different directions by about 90 degrees. (4) The polarizing plate for multicolor display according to claim 1, 2, or 3 of the utility model registration claim, in which the colored polarizing sections of the two colored polarizing films are bonded together without overlapping. .