JPH01287529A - Liquid crystal display element - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a liquid crystal display element, and particularly to a liquid crystal display element having a display surface curved upward or downward.

[Conventional technology]

Conventionally, a liquid crystal display element is configured as shown in FIG. 3, for example. That is, in FIG. 3, the liquid crystal display element 1 includes transparent electrodes 3.1 and 2.1, respectively, each having a predetermined pattern, on the opposing inner surfaces of glass substrates 2, 2'' arranged parallel to each other.
3", and further provided with alignment films 4, 4° formed from above each transparent electrode 3.3" so as to have a predetermined alignment direction on the opposing inner surfaces of each glass substrate 2, 2°,
A liquid crystal cell is constructed by injecting liquid crystal 5 into the space between the two glass substrates 2 and 2°, and applying a sealant 6 around the space to seal it. It is constructed by disposing a polarizing plate (not shown) having a predetermined polarization direction on the outer surface of a glass substrate 2.2'.

The liquid crystal display element 1 configured in this way has transparent electrodes 3.
When no voltage is applied between 3.
For example, they are twisted and aligned along the alignment direction of the alignment films 4, 4'. In this case, the polarized light entering the liquid crystal cell from the glass substrate Fi,2 is rotated along the alignment of the liquid crystal.

Here, when a voltage is applied between the transparent electrodes 3.3', the 50 molecules of liquid crystal become almost perpendicular to the glass substrate Fi2.2' in the area where the patterns of the transparent electrodes 3.3' are facing each other. , the polarized light entering the liquid crystal cell from the glass Mvi2 is not rotated and exits from the glass base [2°]. Thus, by applying or not applying a voltage between the transparent electrodes 3, 3', the pattern of the transparent electrodes 3, 3' is displayed as on or off.

[Problem that the invention seeks to solve]

However, in the liquid crystal display element 1, since the liquid crystal cell is composed of two glass substrates 2.2'',
It is difficult to form a curved display surface of the liquid crystal display element 1, and only a flat display is possible. For this reason, when attached to the operation panel of various devices, it is difficult to observe from the side, and in the case of a liquid crystal display element for large display, the display becomes even more difficult to see because surrounding objects are reflected in the display. There was a problem.

In view of the above points, an object of the present invention is to provide a liquid crystal display element having a curved display surface.

(Means and actions for solving problems) The above purpose is to
According to the present invention, a predetermined shape is formed on the inner surface of a substrate made of two thermoplastic transparent resin films that are curved and molded using a hot press so as to protrude upwardly or downwardly, and are arranged opposite to each other. This is achieved by a liquid crystal display element comprising: a transparent electrode having a pattern; an alignment film rubbed in a predetermined alignment direction; and liquid crystal sealed between the substrates. .

According to this invention, since a thermoplastic transparent resin film is used as the substrate, the substrate can be easily curved and molded to protrude upward or downward by hot pressing. Therefore, when attached to a panel surface such as an operation panel, the display surface of this liquid crystal display element will be attached to the panel surface in a curved state with the display surface protruding upward from the panel surface or recessed downward. The display surface of this liquid crystal display element can be easily recognized even when the surface is observed from an oblique direction, and even in the case of a liquid crystal display element that performs a large display, the display surface is convex or concave. Because of this, surrounding objects are not reflected on the display surface, and the display is very easy to see.

〔Example〕

Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 shows an embodiment of a liquid crystal display element according to the present invention. The structure of the liquid crystal display device 10 is basically the same as that of the conventional liquid crystal display element shown in FIG. Transparent electrodes 12, 12° each having a predetermined pattern are provided on the opposing inner surfaces of substrates 11 and 11' made of transparent resin films arranged parallel to each other, and further on the opposing inner surfaces of each substrate 11 and 11'. Each transparent electrode 12.12'
From above, an orientation M 13°13" formed to have a predetermined orientation direction (in the case shown, both left and right directions in the drawing)
A liquid crystal cell 16 is constructed by injecting liquid crystal 14 into the space between the two substrates 11 and 11' and sealing the space by applying a sealant 15 around the space.

Here, the liquid crystal cell 16 is first formed as shown in FIG. 2(A). ! II. On the opposing inner surfaces of the substrate 11.11' made of a flat transparent resin film, transparent electrodes 12° and 12° and oriented 11113 and 13' are formed, respectively.
(not shown in FIG. 2), the substrate 11.1
After applying the sealant 15 along the inner circumference of 1°, each substrate 11.
A gap control agent 17 is applied to keep the distance between the M substrates 11 and 11' constant.
is inserted between the press molds 18 of the hot press while being inserted between the substrates 11 and 11'' (see FIG. 2(A)).

Next, the sealant I5 is cured by heating and pressing with the press die 18, and the substrate 11.11 is cured.
' are joined to each other (see FIG. 2(B)), and are curved downward according to the shape of the press die 18 during hot pressing (see FIG. 2(C)).
It is molded into

The liquid crystal 14 is injected into the internal space of the liquid crystal cell 16 configured in this manner through the liquid crystal injection port left in a part of the sealant 15, and the injection port is sealed. Polarizing plates (not shown) are disposed above and below the liquid crystal cell 16, that is, on the outside of the substrates 11 and 11'. In this way, the liquid crystal display element 10 is completed.

The liquid crystal display element according to the present invention is constructed as described above, and the liquid crystal display element 1O operates in exactly the same manner as the conventional liquid crystal display element 1, and displays an on-display or off-display of a pattern of transparent electrodes of 12° and 12°. is carried out, and the substrate 11.1
1' is formed in a downwardly curved shape, so when this liquid crystal display element 10 is mounted on an operation panel, etc., the display is displayed on the downwardly concave display surface, making it easy to display even from an oblique direction. can be visually recognized.

In the embodiments described above, the substrates 11° and 11' are formed to be curved concavely downward, but they may be curved upwardly convexly; in this case, the panel When attached to a surface, the display can be easily viewed not only from an angle but also from the side.

〔Effect of the invention〕

As described above, according to the present invention, the substrate is made of two thermoplastic transparent resin films that are curved and molded using a hot press so as to protrude upwardly or downwardly, and that are arranged opposite to each other. Since a liquid crystal display element is constructed by providing a transparent electrode having a predetermined pattern on the inner surface of the substrate and an alignment film rubbed in a predetermined alignment direction, and sealing liquid crystal between the substrates, the substrate can be used as a substrate. Since a thermoplastic transparent resin film is used, the substrate can be easily molded into a curved shape so as to protrude upward or downward by heat pressing, and can be mounted on a panel surface such as an operation panel. In this case, the liquid crystal display element is attached to the panel surface with the display surface protruding upward or downward from the panel surface.

Therefore, even when the panel surface is observed obliquely or from the side, the display surface of the present liquid crystal display element can be easily recognized. Since the surface is convex, surrounding objects will not be reflected on the display surface, and the display will be very easy to see.

Thus, according to the present invention, by having a curved display surface, visibility from an oblique direction or from the side is improved, and even when a large display is performed, surrounding objects are not reflected in the image. An extremely excellent liquid crystal display element with easy-to-see display can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing one embodiment of a liquid crystal display element according to the present invention, and FIG. 2 is a schematic cross-sectional view showing the manufacturing process of the liquid crystal cell in the embodiment of FIG. FIG. 3 is a schematic cross-sectional view showing an example of a conventional liquid crystal display element. 10...Liquid crystal display element; 11, 11'...Glass substrate i 12.12'...Transparent electrode; 13,
13°...Alignment film; 14...Liquid crystal; 15...
Sealing agent; 16...Liquid crystal cell: 17...Gap control agent; 18...Heat press type. Patent applicant: Stanley Electric Co., Ltd. Representative: Patent attorney Hirayama - Muroma: Patent attorney Tamotsu Kaizu Figure 2 (A)

Claims (1)

[Claims] (1) A predetermined pattern is formed on the inner surface of a substrate made of two thermoplastic transparent resin films that are curved and molded using a hot press so as to protrude upward or downward, and are arranged opposite to each other. 1. A liquid crystal display element, comprising: a transparent electrode having a transparent electrode; an alignment film rubbed in a predetermined alignment direction; and a liquid crystal sealed between the substrates.