JPH0228499Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrode extraction structure for a liquid crystal display device, more specifically, an electrode extraction structure that eliminates the lack of illumination light in a liquid crystal display device such as a vehicle that requires a relatively large number of electrodes. .

Display devices using liquid crystal plates (hereinafter referred to as LCD) are used as display devices for vehicles. LCD is a display device that utilizes the property that a liquid crystal is sandwiched between glass cells and transparent electrodes are printed on both sides of the cell to form a display pattern, and that the transparency changes when an electric field is applied to the liquid crystal. Since liquid crystals do not have the ability to emit light, they do this by reflecting sunlight during the day, but at night they must be illuminated in some way.

For this purpose, as shown in FIGS. 1 and 2, an acrylic light guide plate 2 is inserted between the liquid crystal cell 1 and the substrate 3, and four light receiving holes 2a provided laterally are inserted.
Light is incident from The structure for taking out the terminals from the transparent electrodes of the liquid crystal cell 1 is as shown in FIG.
A structure in which the zebra connector 4 is connected to the liquid crystal cell 1 and the substrate 2 by contacting each other (Fig. 2a), pin 5
A structure in which a flexible printed circuit board (FPC) 6 is soldered to a substrate 2 and pressed against the liquid crystal cell 1 (FIG. 2b), and a structure in which a flexible printed circuit board (FPC) 6 is soldered to the substrate 2 and pressed against the liquid crystal cell 1 (FIG. 2b) There is a structure (FIG. 2 c) and a structure bonded to the liquid crystal cell 1 (FIG. 2 d). The structure shown in FIG. 1 is a structure connected by a zebra connector 4.

Like an LCD for a vehicle, there are many electrodes and the terminals are taken out from the long side of the crystal cell 1, so the illumination to the light guide plate 2 must be input from the short side and guided in the longitudinal direction. . For this reason, problems such as uneven illumination and insufficient brightness occurred.

An object of the present invention is to provide an electrode extraction structure for a liquid crystal display device that allows electrode extraction and illumination light incidence from the lateral direction.

In order to achieve the above object, the electrode extraction structure of a liquid crystal display device according to the present invention includes a light guide plate inserted between a liquid crystal cell and a substrate, and a light source for illumination illuminates the light guide plate from the lateral direction. In the electrode extraction structure for connecting the liquid crystal cell and the substrate, an illumination light source provided on the longitudinal side of the light guide plate, an extension portion of the light guide plate extending toward the illumination light source side, and a flexible insulator. a first flexible connector in which conductive metal wires are disposed in the material at minute intervals, one end is connected to the liquid crystal cell, and the extending portion and the liquid crystal cell are press-welded and supported; a second flexible connector having one end connected to the other end of the first flexible connector and the other end connected to the substrate so as to cover the illumination light source; The second flexible connector is configured to take out the electrode of the liquid crystal cell from the same direction as the illumination light source.

According to the above structure, the object of the present invention can be completely achieved.

Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

FIG. 3 is a sectional view showing a first embodiment of the electrode extraction structure for a liquid crystal display device according to the present invention, and FIG. 4 is a perspective view showing an electrode extraction connector used in the first embodiment. .

A light guide plate 2 is placed on the substrate 3, and a liquid crystal cell 1 is provided with a spacer 9 interposed therebetween.
An illumination light source 8 is provided on the right end side of the light guide plate 2. As the illumination light source 8, for example, a fluorescent lamp, a light bulb, or the like is used. One end of the connector 7 for taking out the electrode is connected to the outside of the illumination light source 8 of the board 3 by soldering, and the other end reaches the right end of the light guide plate 2 so as to cover the illumination light source 8. . For example, a flexible printed circuit board or a flexible jumper wire is used as the connector for taking out the electrode. On the back side of the connector 7, a reflective plate is formed by pasting an aluminum box or a white film to improve lighting efficiency. The liquid crystal cell 1 and the connector 7 are connected by a zebra connector 4. For this connection, the light guide plate 2 is provided with an extension part 2b that extends to the right than the conventional one, and the electrode extraction connector 7 is connected by pressure contact between the extension part 2b of the light guide plate 2 and the zebra connector 4. It has been done. The zebra connector 4 is made of thin conductive metal wires arranged in rows at minute intervals in rubber.

FIG. 5 is a diagram showing a second embodiment of the electrode extraction structure for a liquid crystal display device according to the present invention, and FIG. 6 is a perspective view showing an electrode extraction connector used in the second embodiment.

In the second embodiment, a zebra connector 4 is sandwiched between the liquid crystal cell 1 and the extending portion 2b of the light guide plate 2. The zebra connector 4 and the electrode extraction connector 7 are connected as shown in FIG. 6a by inserting the protruding terminal 7a of the electrode extraction connector 7 in the direction of the arrow, and connecting as shown in FIG. 6b. In this way, durability is high and connection becomes easy.

As explained in detail above, according to the present invention,
Since the illumination light can be incident and the electrodes can be taken out in the same direction, even in liquid crystal display devices for vehicles that have a large number of electrodes, the electrodes can be taken out on the long side and the illumination light can be taken out in the same direction, eliminating uneven illumination. Problems such as insufficient brightness are no longer present.

Furthermore, illumination from the long side widens the incident area, and the reflected light from the reflector also enters.
Efficient lighting has become possible.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the electrode lead-out structure of a conventional liquid crystal display device, FIG. 3 is a sectional view showing a first embodiment of the electrode lead-out structure of the liquid crystal display device according to the present invention, and FIG. The figure is a perspective view showing the connector for taking out the electrode used in the first embodiment;
The figure is a sectional view showing a second embodiment of the electrode extraction structure of a liquid crystal display device according to the present invention, and FIG.
FIG. 3 is a perspective view showing an electrode extraction connector used in the embodiment. 1...Liquid crystal cell, 2...Light guide plate, 3...Substrate,
4... Zebra connector, 5... Pin, 6...
FPC, 7... Connector for electrode extraction, 8...
Light source for illumination, 9...Spacer.

Claims (1)

[Claims for Utility Model Registration] (1) A light guide plate is inserted between a liquid crystal cell and a substrate, and the liquid crystal cell and the substrate of a liquid crystal display device are connected to each other in a liquid crystal display device that is illuminated from the side of the light guide plate by an illumination light source. In the electrode extraction structure, an illumination light source provided on the longitudinal side of the light guide plate, an extension portion of the light guide plate extending toward the illumination light source side, and a conductive metal in a flexible insulating material. a first flexible connector in which wires are arranged at minute intervals, one end is connected to the liquid crystal cell, and the extending portion and the liquid crystal cell are pressed and supported; a second flexible connector having one end connected to the other end of the connector and the other end connected to the substrate so as to cover the illumination light source, and the first and second flexible connectors An electrode extraction structure for a liquid crystal display device, characterized in that the electrode of the liquid crystal cell is configured to be extracted from the same direction as the illumination light source. (2) The first flexible connector and the second flexible connector are connected by connecting the second flexible connector to the first flexible connector and the extending portion of the light guide plate. The electrode extraction structure of the liquid crystal display device according to claim 1, which is sandwiched and connected. (3) The first flexible connector and the second flexible connector are connected by inserting a protruding terminal of the second flexible connector from the outside of the first flexible connector. An electrode lead-out structure for a liquid crystal display device according to claim 1 of the above-mentioned utility model registration. (4) The inside of the second flexible connector is configured to form a reflective surface to reflect the light from the illumination light source to increase the amount of light directed to the light guide plate. Electrode extraction structure of the liquid crystal display device according to item 1.