JPH0273226A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To prevent a liquid crystal display body from being brought to erroneous display by static electricity without using an expensive protective panel by juxtaposing additionally a conductive body whose one end is grounded on a deflecting plate. CONSTITUTION:A conductive body 20 is provided on the surface of a first deflecting plate 13a, its lower part is connected to a terminal 24, and also, a protective panel in front of the deflecting plate 13a is eliminated. In such a liquid crystal display device, when static electricity is generated toward a liquid crystal display body, its static electricity flows to a chassis through a sheet 20 and the terminal 24, and flows out to the outside therefrom. Accordingly, it does not occur that the liquid crystal display body generates an erroneous display due to static electricity, or static electricity flows to a microcomputer provided on a substrate from the liquid crystal display body and the microcomputer is broken down.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device used for displaying, for example, in-vehicle audio.

[Prior Art] FIG. 4 is a side cross-sectional view showing an example of a conventional liquid crystal display device used for in-vehicle audio, and FIG. 5 is an exploded perspective view of the main parts thereof. 4 is a liquid crystal display mounted in front of the board 2, and 5 is a copper plate that surrounds the periphery of the liquid crystal display 4 and is connected to the chassis 1. A shield plate 6 is fitted in front of the shield plate 5, and 7 is an acrylic protective panel fitted onto the panel 6 to protect the liquid crystal display 4. ] is a side sectional view of the liquid crystal display body 4, 10 is a liquid crystal section, lla,
llb are first and second transparent panels attached to both sides of the liquid crystal section lO, respectively. 4 poles, 1.2a and 12b are the first and second transparent glasses attached to the first and second transparent electrodes 11a and llb, respectively; 13a and L3b are the first
and deflection plates attached to the second transparent glasses 12a and 12b, respectively. Reference numeral 14 is a terminal provided under the first transparent glass 12a and connected to the first transparent electrode 11a.

In the liquid crystal display 4 configured as described above, the first
When the gap between the transparent electrode 11a and the second transparent electrode tib is off, the molecular arrangement of the liquid crystal section 10 is twisted by 90 degrees, so that the incident deflection plane that has passed through the second deflection plate 13a is 90 degrees. On the other hand, when a voltage is applied to the liquid crystal section 10, the molecules of the liquid crystal section 10 are untwisted and rearranged in the direction of the electric field, and the input surface rotates. Therefore, the liquid crystal display 4 can be switched between a dark state and a bright state depending on the presence or absence of a voltage to the liquid crystal section IO. Figures etc. are displayed.

Further, when operating the panel 6, static electricity may be generated toward the liquid crystal display 4, but the static electricity flows along the surface of the safety panel 7 to the shield plate 5, and from there flows to the chassis 1. flows out through the

[Problems to be Solved by the Invention] In the liquid crystal display device configured as described above, a protective panel 7 made of acrylic is used to protect the liquid crystal display body 4.
However, this method has the problem that it is expensive and the overall manufacturing cost is high.

The present invention has been made in order to solve these problems, and the object thereof is to eliminate the expensive CIL panel and provide a liquid crystal display device (t') with anti-static measures.

[Means for Solving the Problems] A liquid crystal display device according to the present invention has a conductor, one end of which is grounded, attached to a deflection plate. The incident static electricity flows out from the conductor without reaching the liquid crystal section.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing a liquid crystal display device used in an in-vehicle audio device as an embodiment of the present invention, and FIG. 2 is a side sectional view of the liquid crystal display body, and FIGS. Identical or equivalent parts are designated by the same reference numerals, and their explanations will be omitted.

In the figure, 20 is a conductive sheet as a conductor provided on the surface of the first deflection plate 13a, the lower part of which is connected to the terminal 24, and which was conventionally located in front of the first deflection plate 13a. The protective panel 7 has been removed. 21 is a copper foil provided on the back surface of the board 2 and is connected to the chassis 1.

In such a liquid crystal display device, when static electricity is generated toward the liquid crystal display body 23, the static electricity is removed by the conductive sheet 2.
0, flows into the chassis 1 through the terminal 24 and the copper foil 21, and from there flows out to the outside, so that the liquid crystal display 2 is damaged by static electricity.
3 will not cause erroneous display, and static electricity will not flow from the liquid crystal display 23 to the microcomputer (not shown) on the substrate 2, causing the microcomputer to be destroyed.

FIG. 3 is a side sectional view of a liquid crystal display 23 showing another embodiment of the present invention, in which a conductive sheet 2Z is provided on the back surface of the first threshold plate 13a. Further, in the above embodiments, the case where the conductive sheets 20 and 22 were used as the conductor was explained, but conductive glass may be used instead.

[Effects of the Invention] As explained above, the liquid crystal display device of the present invention does not require the use of an expensive acrylic protective panel by attaching a conductor whose one end is grounded to the 1g facing plate. For example, it is possible to prevent a liquid crystal display from displaying incorrect information due to static electricity, or to prevent a microcomputer on a substrate from being destroyed due to static electricity, thereby reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing one embodiment of the invention, FIG. 2 is a side sectional view of the liquid crystal display shown in FIG. 1, and FIG. 3 is a side sectional view of the liquid crystal display showing another embodiment of the invention. 4 is a side sectional view showing an example of a conventional liquid crystal display device, FIG. 5 is an exploded fI view of the main part of FIG. 4, and FIG. 6 is a side sectional view of the liquid crystal display shown in FIG. 4. It is. In the figure, 10 is a liquid crystal section, llu and llb are first and second transparent electrodes, 13a and 13b are first and second deflection plates, 20 and 22 are conductive sheets, and 23 is a liquid crystal display. In addition, in each figure, the same reference numerals refer to the same or corresponding parts. Relationship with the case involving the person who filed the patent application Address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Moriya Shiki, Representative of Mitsubishi Electric Corporation

Claims (1)

[Claims] 1. A liquid crystal display device comprising a liquid crystal display body formed by stacking a liquid crystal part, an electrode, and a deflection plate, characterized in that a conductor whose one end is grounded is attached to the deflection plate.