JPH05232469A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To curtail the number of parts to be exchanged by separating the illumination lamp from a light guide plate and making the light guide plate and a circuit block in one body thereby exchanging the illumination lamp only at the time of the defect of the lamp. CONSTITUTION:A circuit block 4 is arranged on a light guide plate 7 and further an illumination lamp 9 together with a lamp holder 10 are mounted thereon. Thus, the light guide plate 7, the circuit block 4 and the illumination lamp 9 are integrated into one body. Connectors 8 are arranged in the groove part of the light guide plate 7, which is joined to the wiring pattern of a liquid crystal panel 1 while positioning the pattern. Thereby, the connectors 8 are elastically pressed to the wiring pattern of the liquid crystal panel 1 and to the wiring pattern 11 of the circuit block 4 to electrically connect the liquid crystal panel 1 and the circuit block 4. The wiring pattern 11 of the circuit block 4 is formed on the upper surface of a printed circuit board 6 and is electrically connected to electronic parts 5 with through-holes or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a liquid crystal display device.

[0002]

2. Description of the Related Art Liquid crystal display devices are used in a wide range of applications because of their features of low power consumption, small size and light weight.
Recently, in addition to the conventionally used TN (twisted nematic) type, the twist angle of liquid crystal molecules is 180 °.
With the development of the birefringence mode liquid crystal display device as described above,
Large-capacity, high-visibility displays for personal computers, word processors, etc. have become possible, and their applications are expanding.

Such a liquid crystal display device has, for example, the following configuration. That is, the liquid crystal panel and the driving circuit block are electrically connected by the conductive rubber connector, and the illumination plate in which the illumination lamp and the light guide plate are integrated is inserted between the liquid crystal panel and the circuit block. ..

[0004]

By the way, in this type of liquid crystal display device, since the illumination lamp and the light guide plate are integrated, they are always integrated even when they are replaced, and the cost of replacement parts is high. Since this part is attached at the end of the procedure for assembling the liquid crystal display device, the parts that have been assembled earlier may be affected by contact or the like during replacement. The present invention has been made in view of such conventional circumstances.

[0005]

According to the present invention, there is provided a liquid crystal panel, a circuit block for driving the liquid crystal panel, a connector for electrically connecting the liquid crystal panel and the circuit block, and an illumination section having an illumination lamp and a light guide plate. It is for a liquid crystal display device provided with, the illumination lamp and the light guide plate are separated,
The light guide plate and the circuit block are integrated.

[0006]

In the present invention, the illumination lamp and the light guide plate are separated,
By integrating the light guide plate and the circuit block, only the illumination lamp needs to be replaced when the illumination lamp is defective, reducing the value of the replacement parts.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the present invention. In FIG. 1, a liquid crystal panel 1 is configured by holding a liquid crystal between two substrates 2 and 3 made of, for example, glass. The circuit block 4 is composed of a printed wiring board 6 having an electronic component 5 such as an IC mounted on the lower surface of the drawing. Further, the light guide plate 7 as a holder is made of, for example, an acrylic material, has a shape capable of accommodating the circuit block 4 in the direction of the arrow by molding or processing, and further has a groove for mounting the connector 8 made of a conductive rubber connector, It has two opposite directions.

In this embodiment, the circuit block 4 is installed on the light guide plate 7, and the illumination lamp 9 is attached to the lamp holder 1.
Install with 0. In this way, the light guide plate 7, the circuit block 4, and the illumination lamp 9 are integrated, the connector 8 is installed in the groove portion of the light guide plate 7, and the connector 8 is positioned while being applied to the wiring pattern portion (not shown) of the liquid crystal panel 1. To combine. As a result, the connector 8 becomes the wiring pattern portion of the liquid crystal panel 1 and the wiring pattern portion 11 of the circuit block 4.
Is elastically pressed against the liquid crystal panel 1 and the circuit block 4
Are electrically connected. The wiring pattern portion 11 of the circuit block 4 is formed on the upper surface of the printed wiring board 6 in the drawing, and is electrically connected to the electronic component 5 via a through hole or the like. Then, the liquid crystal panel 1 and the light guide plate 7 integrated with the circuit block 4 are mechanically coupled by the bezel 12 to complete a desired liquid crystal display device.

In this embodiment, in order to replace the illumination lamp 9 mounted on the light guide plate 7, the light guide plate 7 and the illumination lamp 9 are replaced.
After removing the screw fixing the lamp holder 10 and removing the lamp holder 10, the illumination lamp 9 can be taken out, so that the number of replacement parts can be reduced. In addition, a connector 8 is attached to the light guide plate 7.
Since the groove portion is provided as the positioning means, the connector 8 can be easily and accurately attached and detached. Further, since the light guide plate 7 has a shape capable of accommodating the circuit block 4, the number of parts can be reduced and the assembling operation can be performed in a short time.

FIG. 2 is a perspective view showing another embodiment of the light guide plate 7 according to the present invention, in which the positioning groove of the connector is different from the light guide plate 7 of FIG. That is, in FIG. 2, connectors can be inserted in three directions, and when the wiring pattern portions of the electrodes in both the X direction and the Y direction in the liquid crystal panel are electrically connected to the drive printed wiring board. Can handle.

[0012]

According to the present invention, since the illumination lamp and the light guide plate are separated, and the light guide plate and the circuit block are integrated, the replacement of the illumination lamp is, for example, simply removing the fixing screw. The points can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing another embodiment of the light guide plate according to the present invention.

[Explanation of symbols]

 1 ... Liquid crystal panel 4 ... Circuit block 7 ... Light guide plate 8 ... Connector 9 ... Illumination lamp

Claims (1)

[Claims] 1. A liquid crystal display comprising a liquid crystal panel, a circuit block for driving the liquid crystal panel, a connector for electrically connecting the liquid crystal panel and the circuit block, and an illumination unit having an illumination lamp and a light guide plate. In the device, the liquid crystal display device is characterized in that the illumination lamp and the light guide plate are separated, and the light guide plate and the circuit block are integrated.