JP3064504B2 - LCD module - Google Patents

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]

2. Description of the Related Art A liquid crystal module used in an electronic device such as a liquid crystal projector has a liquid crystal display panel in which liquid crystal is sealed between two transparent substrates made of glass or the like, and the liquid crystal display panel is driven. And a drive circuit board on which a drive semiconductor chip is mounted, and an output terminal of the drive circuit board is joined to an input terminal 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 from, for example, a manufacturing plant to an assembling plant, and an electronic device such as a liquid crystal projector is assembled at the assembling plant, a plurality of transporting members having a plurality of liquid crystal module storage sections are required. The liquid crystal module is stored and transported, and the liquid crystal module is taken out of the transport member at an assembly factory and assembled.

[0004]

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. When an external force is applied during transportation or during handling during assembly, there has been a problem that conduction failure 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 capable of preventing a conduction failure from occurring at a joint portion between a liquid crystal display panel and a drive circuit board even when an external force is applied during transportation or handling during assembly. is there.

[0005]

SUMMARY OF THE INVENTION The present invention provides a liquid crystal display panel comprising a pair of transparent substrates and a liquid crystal sandwiched between the pair of transparent substrates, and a liquid crystal display panel joined to the liquid crystal display panel to drive the liquid crystal display panel. A driving circuit board on which the driving semiconductor chip is mounted, and an opening portion at a location corresponding to a display area of the liquid crystal display panel, and provided on the lower surface of the lower transparent substrate of the liquid crystal display panel; A flat plate-shaped holder having an abutting portion with respect to an outer peripheral portion, and an opening at a position corresponding to a display area of the liquid crystal display panel,
The liquid crystal display panel, the drive circuit board, and the holder are covered from the front and back, and the holder is stored in a state where the holder is prevented from moving in the horizontal direction. A pair of metal cases provided with a pressing portion for pressing the substrate; and a means for preventing horizontal movement of the liquid crystal display panel in the pair of cases by the holder, and the pressing of the pair of cases. A vertical movement preventing means is provided.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a pair of transparent
A liquid crystal display panel comprising a substrate and liquid crystal sandwiched between the pair of transparent substrates; 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 liquid crystal display panel. Has an opening at a position corresponding to the display area, covers the liquid crystal display panel and the drive circuit board from the front and back, and is transparent at the upper side of the liquid crystal display panel.
A pair of metal cases having a pressing portion for pressing the substrate ;
The liquid crystal display panel is provided in a pair of cases.
The liquid crystal having an opening at a location corresponding to the
Has a fitting part to the outer periphery of the lower transparent substrate of the display panel
A flat-shaped holder,
Of the liquid crystal display panel in the pair of cases.
It is provided with means for preventing movement in the horizontal direction .

[0007]

1 and 2 show the main parts of a liquid crystal module according to an embodiment of the present invention. The liquid crystal module includes a liquid crystal display panel 1, a plurality of drive circuit boards 3 on which a driving semiconductor chip 2 for driving the liquid crystal display panel 1 is mounted, a pair of cases 4 and 5 made of metal such as stainless steel, and a composite. A holder 6 made of resin or the like is provided.

The liquid crystal display panel 1 has transparent electrodes (not shown) arranged in a matrix on opposing surfaces of upper and lower transparent substrates 11 and 12 made of glass or the like, and a liquid crystal (not shown) therebetween. Are sealed, and both ends of the lower transparent substrate 12 are projected outside the upper transparent substrate 11, and input terminals (not shown) are provided on upper surfaces of both ends of the projected lower transparent substrate 12. Structure.

The drive circuit board 3 is made of ceramic, glass,
Although not shown, it has a structure in which 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
Are bonded to predetermined portions of the wiring pattern via solder bumps and the like (not shown). The output terminal section of the drive circuit board 3 is joined to the input terminal section of the transparent substrate 12 below the liquid crystal display panel 1 via solder (not shown) or an anisotropic conductive adhesive. 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 substantially 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 substantially on the same plane. It has a flat shape as a whole.

The upper case 4 has a side plate 22 suspended from a rectangular flat plate 21.
An opening 23 is provided at a position corresponding to the display area of FIG. 1, and a pressing portion 24 is formed by a 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 a plurality of positioning projections 29 at positions corresponding to the outer peripheral portion of the transparent substrate 12 below the liquid crystal display panel 1 on the upper surface of the rectangular flat plate 28. The opening 30 is provided at a location corresponding to the display area of FIG.

The liquid crystal display panel 1 and the plurality of drive circuit boards 3, which are generally flat, have a state in which the transparent substrate 12 below the liquid crystal display panel 1 is positioned by the positioning projections 29 of the holder 6. The holder 6 is placed on the upper surface of the holder 6 and the holder 6 is
Are housed in a state where movement in the horizontal direction is prevented, so that they are housed in the pair of cases 4 and 5 while being prevented from moving in the horizontal direction. The pair of cases 4 and 5 is such that the side plate 22 of the upper case 4 is
Are integrated by being press-fitted inside the side plate 26. In this state, the pressing portion 2 of the upper case 4
4 presses the periphery of the transparent substrate 11 on the upper side of the liquid crystal display panel 1, so that the liquid crystal display panel 1 and the plurality of drive circuit boards 3, which are generally flat, are prevented from moving in the vertical direction. ing.

As described above, in this liquid crystal module, the liquid crystal display panel 1 and the plurality of drive circuit boards 3 and the like which are generally flat are covered by the pair of metal cases 4 and 5 from above and below (front and back). Therefore, a pair of metal cases 4, 5
The liquid crystal display panel 1, the drive circuit board 3, and the joint thereof can be reinforced by this, so that even when an external force is applied during transportation or during handling during assembly, the joint between the liquid crystal display panel 1 and the drive circuit board 3 can be strengthened. It is possible to prevent conduction failure from occurring. In addition, the liquid crystal display panel 1 and the plurality of drive circuit boards 3 and the like, which are generally flat, are held by the holder 6 having the positioning projections 29, thereby preventing the holder 6 from moving in the horizontal direction and the upper case. Since the pressing portions 24 of 4 prevent movement of the liquid crystal display panel 1 and the plurality of drive circuit boards 3 and the like which are entirely flat in the vertical direction, the liquid crystal display panel 1 and the liquid crystal display panel 1 which are entirely flat The plurality of drive circuit boards 3 and the like can be transported without rattling, and can be assembled to an electronic device such as a liquid crystal projector without rattling. Further, even when assembled to an electronic device such as a liquid crystal projector, the openings 2 are provided at positions corresponding to the display areas of the liquid crystal display panel 1 of the pair of cases 4, 5 and the holder 6.
3, 27, 30 are provided, so that these openings 2
Light for display passes through 3, 27 and 30, and no inconvenience occurs.

[0013]

As described above, according to the present invention, the liquid crystal display panel, the drive circuit board, and the holder are covered by the pair of metal cases from the front and back, so that the liquid crystal display is formed by the pair of metal cases. The panel, the drive circuit board, and the joint thereof can be reinforced, so that even when an external force is applied during transportation or handling during assembly, the connection failure between the liquid crystal display panel and the drive circuit board does not occur. can do. Further, a flat plate-like holder having an abutting portion with respect to the outer peripheral portion of the lower transparent substrate of the liquid crystal display panel is provided in the case, and the holder is stored in a state in which the holder is prevented from moving in the horizontal direction, whereby the case is stored. By preventing the liquid crystal display panel from moving in the horizontal direction within the case, the case is provided with a pressing portion for pressing the upper transparent substrate of the liquid crystal display panel at a position facing the holder, so that The movement of the liquid crystal display panel in the vertical direction is prevented, so that the liquid crystal display panel can be prevented from rattling in the case during transportation and assembly to the electronic device.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

[Explanation of symbols]

 DESCRIPTION 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)

(57) [Claims] 1. A liquid crystal display panel comprising a pair of transparent substrates and a liquid crystal sandwiched between the pair of transparent substrates, and a driving semiconductor chip joined to the liquid crystal display panel for driving the liquid crystal display panel. Drive circuit board, and an opening at a location corresponding to the display area of the liquid crystal display panel.
And a lower transparent substrate lower surface of the liquid crystal display panel
And a contact portion with respect to an outer peripheral portion of the lower transparent substrate.
A flat holder having an opening at a position corresponding to a display area of the liquid crystal display panel , the liquid crystal display panel , the drive circuit board, and
There the said holder from the front and back, in the horizontal direction of the holder
Together housed in a state of being prevented from moving, versus the holder
And a pair of metal cases provided with a pressing portion for pressing the upper transparent substrate of the liquid crystal display panel at a position facing the liquid crystal display panel, and a horizontal direction of the liquid crystal display panel in the pair of cases by the holder. Movement inhibiting means , and said pair of
Hand for preventing vertical movement by the pressing portion in the case
Stage liquid crystal module, comprising the. 2. The method according to claim 1 , wherein the abutting portion provided on the holder comprises a positioning projection, and the positioning projection is provided at at least a plurality of locations corresponding to an outer peripheral portion of the lower transparent substrate. The liquid crystal module according to claim 1, wherein: