JPH04355721A - Liquid crystal module - Google Patents

Abstract

PURPOSE:To obviate the generation of a conduction defect in the joint part of a liquid crystal panel and a driving circuit substrate even if external force is applied thereto at the time of transporting or handling during assembly by coating this part with metallic cases. CONSTITUTION:The output terminal part of the driving circuit substrate 3 mounted with a semiconductor chip 2 is joined to the input terminal part of a transparent substrate 12 on the lower side of the liquid crystal display panel 1. The liquid crystal display panel 1 and the driving circuit substrate 3, etc., are imposed atop a holder 6 in the state in which the lower transparent substrate 12 of the liquid crystal display panel 1 is held positioned by a projection 29 for positioning of the holder 6. In addition, the panel and substrate are housed together with the holder 6 into a pair of the metallic cases 4, 5 in the state of prohibiting the movement in horizontal and vertical directions. A pair of the cases 4, 5 are integrated as side plates 22 are press-fitted to the inner side of side plates 26 to reinforce the liquid crystal display panel 1, the driving circuit substrate 3 and the joint part thereof.

Description

[Detailed description of the invention]

0001

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

0002

[Prior Art] A liquid crystal module used in electronic equipment such as a liquid crystal projector includes a liquid crystal display panel in which liquid crystal is sealed between two transparent substrates made of glass or the like, and a liquid crystal display panel that drives the liquid crystal display panel. There is a drive circuit board on which a drive semiconductor chip is mounted, and the output terminal section of the drive circuit board is bonded to the input terminal section of the liquid crystal display panel via solder or an anisotropic conductive adhesive.

By the way, when such a conventional liquid crystal module is transported, for example, from a manufacturing factory to an assembly factory, and an electronic device such as a liquid crystal projector is assembled at the assembly factory, a plurality of liquid crystal module storage parts are attached to a transportation member having a plurality of liquid crystal module storage parts. The LCD modules are stored and transported, and the LCD modules are removed from the transportation materials and assembled at the assembly factory.

0004

[Problems to be Solved by the Invention] However, in the conventional liquid crystal module, the output terminal portion of the drive circuit board is simply joined to the input terminal portion of the liquid crystal display panel via solder or an anisotropic conductive adhesive. If an external force is applied during transportation or handling during assembly, there has been a problem in that poor conductivity may occur at the joint between the liquid crystal display panel and the drive circuit board. An object of the present invention is to provide a liquid crystal module that can prevent conduction defects from occurring at the joint between a liquid crystal display panel and a drive circuit board even if an external force is applied during transportation or handling during assembly. be.

[0005]

[Means for Solving the Problems] The present invention provides a liquid crystal display panel, a drive circuit board bonded to the liquid crystal display panel and mounted with a driving semiconductor chip for driving the liquid crystal display panel, and a drive circuit board for driving the liquid crystal display panel. The device includes a pair of metal cases that have an opening at a location corresponding to the display area and cover the liquid crystal display panel and the drive circuit board from the front and back.

[0006]

[Operation] According to the present invention, since the liquid crystal display panel and the drive circuit board are covered by a pair of metal cases from the front and back, the liquid crystal display panel and the driving circuit board are covered by the pair of metal cases.
The drive circuit board and its joints can be reinforced,
Therefore, even if an external force is applied during transportation or handling during assembly, it is possible to prevent conduction failure from occurring at the joint between the liquid crystal display panel and the drive circuit board.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show the main parts of a liquid crystal module according to an embodiment of the present invention. This liquid crystal module consists of a liquid crystal display panel 1, a plurality of drive circuit boards 3 on which drive semiconductor chips 2 for driving the liquid crystal display panel 1 are mounted, a pair of cases 4 and 5 made of metal such as stainless steel, and a synthetic A holder 6 made of resin or the like is provided.

Among these, the liquid crystal display panel 1 has transparent electrodes (not shown) arranged in a matrix on the opposing surfaces of upper and lower transparent substrates 11 and 12 made of glass or the like, and a liquid crystal (not shown) arranged between them. is sealed, both ends of the lower transparent substrate 12 are protruded to the outside of the upper transparent substrate 11, and input terminals (
(not shown).

The drive circuit board 3 is made of ceramic, glass,
It is made of synthetic resin or the like, and has a structure in which, although not shown, a wiring pattern and an output terminal made of a conductive material such as copper are provided on the lower surface. The semiconductor chip 2 is a drive circuit board 3
It is bonded to a predetermined location of the wiring pattern via solder bumps (not shown) or the like. The output terminal portion of the drive circuit board 3 is bonded to the input terminal portion of the transparent substrate 12 on the lower side of the liquid crystal display panel 1 via solder or an anisotropic conductive adhesive (not shown). In this state, the drive circuit board 3 and the transparent substrate 11 on the upper side of the liquid crystal display panel 1 are located on almost the same plane, and the semiconductor chip 2 and the transparent substrate 12 on the lower side of the liquid crystal display panel 1 are on almost the same plane. It is located in a flat plate shape.

The upper case 4 has a side plate 22 vertically disposed around a rectangular flat plate 21, and a liquid crystal display panel 1 on the flat plate 21.
An opening 23 is provided at a location corresponding to the display area, and a pressing portion 24 is formed by the flat plate 21 around the opening 23. The lower case 5 has a structure in which a side plate 26 is erected around a rectangular flat plate 25, and an opening 27 is provided in a portion of the flat plate 25 corresponding to the display area of the liquid crystal display panel 1. The holder 6 is provided with an annular or plurality of positioning protrusions 29 on the upper surface of the rectangular flat plate 28 at a location corresponding to the outer periphery of the transparent substrate 12 on the lower side of the liquid crystal display panel 1. It has a structure in which an opening 30 is provided at a location corresponding to the display area.

[0011] The liquid crystal display panel 1 and the plurality of drive circuit boards 3 etc., which are entirely flat, are in a state in which the transparent substrate 12 on the lower side of the liquid crystal display panel 1 is positioned by the positioning protrusion 29 of the holder 6. The holder 6 is placed on the upper surface of the holder 6, and the holder 6 is placed on a pair of cases 4 and 5.
By being stored in a state in which movement in the horizontal direction is prevented, it is stored in a state in which movement in the horizontal direction is prevented in the pair of cases 4 and 5. A pair of cases 4
, 5 are integrated by the side plate 22 of the upper case 4 being press-fitted inside the side plate 26 of the lower case 5. In this state, the pressing part 24 of the upper case 4
presses the periphery of the transparent substrate 11 on the upper side of the liquid crystal display panel 1, thereby preventing vertical movement of the liquid crystal display panel 1, the plurality of drive circuit boards 3, etc., which are generally flat. There is.

As described above, in this liquid crystal module, the liquid crystal display panel 1 and the plurality of drive circuit boards 3, etc., which are generally flat, are covered by a pair of metal cases 4 and 5 from above and below (front and back). So, a pair of metal cases 4 and 5
This makes it possible to reinforce the liquid crystal display panel 1, drive circuit board 3, and the joints thereof, so that even if external force is applied during transportation or handling during assembly, the joints between the liquid crystal display panel 1 and drive circuit board 3 will not be damaged. It is possible to prevent conduction defects from occurring. In addition, the liquid crystal display panel 1, a plurality of drive circuit boards 3, etc., which are flat as a whole, are held in a holder 6 having a positioning protrusion 29, and horizontal movement of the holder 6 is prevented, and the upper case 4 prevents the liquid crystal display panel 1 and the plurality of drive circuit boards 3, etc., which are entirely flat, from moving in the vertical direction. A plurality of drive circuit boards 3 and the like can be transported without wobbling, and can be assembled into electronic equipment such as a liquid crystal projector without wobbling. Furthermore, even when assembled into an electronic device such as a liquid crystal projector, openings 2 are formed in the pair of cases 4 and 5 and the holder 6 at locations corresponding to the display areas of the liquid crystal display panel 1.
3, 27, and 30, these openings 23
, 27, and 30, and no inconvenience occurs.

[0013]

As explained above, according to the present invention, since the liquid crystal display panel and the drive circuit board are covered by a pair of metal cases from the front and back, the liquid crystal display panel and the drive circuit board are covered by the pair of metal cases. To be able to reinforce a drive circuit board and its joints, so that conductivity failure does not occur at the joints between a liquid crystal display panel and a drive circuit board even if external force is applied during transportation or handling during assembly. Can be done.

[Brief explanation of drawings]

FIG. 1 is a plan view of a liquid crystal module in an embodiment of the present invention.

FIG. 2 is a sectional view taken along line A-A in FIG. 1;

[Explanation of symbols]

1. Liquid crystal display panel 2 Semiconductor chip 3 Drive circuit board 4, 5 Case 6 Holder 23, 27, 30 opening 29 Positioning protrusion

Claims (2)

[Claims] 1. A liquid crystal display panel, a drive circuit board bonded to the liquid crystal display panel and mounted with a driving semiconductor chip for driving the liquid crystal display panel, and a driving circuit board corresponding to a display area of the liquid crystal display panel. 1. A liquid crystal module comprising a pair of metal cases having openings at certain locations and covering the liquid crystal display panel and the drive circuit board from the front and back. 2. A holder according to claim 1, wherein the pair of cases has an opening at a location corresponding to a display area of the liquid crystal display panel, and a holder for holding at least the liquid crystal display panel. The liquid crystal module described.