JPH032730A - Connection structure for liquid crystal display driving substrate - Google Patents

Abstract

PURPOSE:To prevent a contact defect between a panel terminal and a conductor pattern and peeling by coating the rear part of an LCD driving substrate with a moisture-proof resin and providing a slip film on the surface of this resin and providing shield cases to clip and LCD panel and the slip film. CONSTITUTION:An LCD panel terminal 7 and a conductor pattern 6 are put one over the other with an anisotropic conductive film 4 between them, and they are heated and pressed from the rear of an LCD driving substrate 2 to electrically connect the panel terminal 7 and the conductor pattern 6 by the anisotropic conductive film 4. The rear part of the LCD driving substrate 2 is coated with a moisture-proof resin 9', and a slip film 8 is provided on the surface of this resin 9', and shield cases 3 and 3' to clip a LCD panel and the slip film 8 are provided, thereby constituting a connection structure. Thus, the panel terminal and the conductor pattern are pressed with a uniform pressure (about 1kg/cm<2>) to prevent a contact defect between them and peeling.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a liquid crystal display (LCD) driving substrate and an L
This relates to a connection structure with a CD panel terminal.

[Conventional technology]

Conventionally, the connection between this type of LCD drive board and the terminals of the LCD panel is as shown in FIGS. 3(a) and 3(b). The conductor pattern 6 is provided as shown in FIG.
The conductor pattern 6 and the LCD panel terminal 7 are connected by heating and pressing from above the laminated LCD drive substrate 2 with an anisotropic conductive film 4 interposed between the conductor pattern 6 and the LCD panel terminal 7 to establish electrical continuity. was.

[Problem to be solved by the invention]

In the conventional LCD drive board connection structure described above, the LCD drive board 2 made of synthetic resin is heated and pressed onto the terminals of the LCD panel 1 made of glass, so that the coefficient of thermal expansion between the LCD panel 1 and the LCD drive board 2 is Due to the difference in temperature, contact failure or peeling of the terminals may occur when the ambient temperature changes (0° C. to +40° C.).

[Means to solve the problem]

The present invention provides a liquid crystal display drive in which an anisotropic conductive film is interposed between the terminals of the LCD panel and the conductor pattern of the LCD drive board, and the panel terminals and the conductor pattern are connected by heating and pressing from the back of the overlapping LCD drive board. The board connection structure is characterized by coating a moisture-proof resin on the back of the LCD drive board, providing a sliding film on the surface of the moisture-proofing resin, and comprising a shield case structured to sandwich the LCD panel and the sliding film.

In contrast to the conventional LCD drive board connection structure described above, in the present invention, the moisture-proof resin is rubber-like, and the sliding film absorbs the difference in thermal expansion coefficient between the rubber-like moisture-proof resin and the shield case, and the shield case creates a uniform pressure. (approximately 1 kg/aa) presses the panel terminal and conductor pattern.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1(a) is a plan view of a first embodiment of the present invention, and FIG. 1(b) is a sectional view taken along the line AA in FIG. 1(a).

An LCD panel terminal 7 is drawn out to the LCD panel l. On the other hand, a conductor pattern 6 is provided on the LCD drive board 2 so as to correspond to the LCD panel terminal 7. Then, the anisotropic conductive film 4 is interposed between the LCD panel terminal 7 and the conductor pattern 6, and the two are overlapped to form the LC.
The panel terminals 7 and the conductor pattern 6 are electrically connected by the anisotropic conductive film 4 by heating and pressing from the back of the D drive board 2. A moisture-proof resin 9 is attached to the back of the LCD drive board 2.
This connection structure is provided with a shield case 3°3' having a structure in which the LCD panel 1 and the sliding film 8 are sandwiched between the LCD panel 1 and the sliding film 8.

FIGS. 2(a) and 2(b) are a plan view and a sectional view of a second embodiment of the present invention. In this embodiment, shield case 3
This has the advantage of improving reliability by strengthening the structure and increasing the pressure with which panel terminals 7 and conductor patterns 6 are pressed to about 1.5 kg to 2 kg/-.

〔Effect of the invention〕

As explained above, the present invention provides a shield case 3 having a structure in which the LCD panel l and the sliding film 8 are sandwiched between each other.
, 3', uniform pressure (1 kg
/a+1), the panel terminal and the conductor pattern are pressed against each other, which has the effect of preventing poor contact or peeling between the two.

[Brief explanation of drawings]

FIGS. 1(a) and (b) are a plan view and a sectional view of a first embodiment of the present invention, and FIGS. 2(a) and (b) are a plan view and a sectional view of a second embodiment of the present invention. Figure 3 (a), (b
) are a plan view and a sectional view showing a connection structure of a conventional liquid crystal display driving board. 1...LCD panel, 2...LCD drive board, 3.3'...shield case, 4...
...Anisotropic conductive film, 5...LSI,
8... Conductor pattern, 7... LCD panel terminal, 8... Slip film, 9.9'.
... Moisture-proof resin. Agent Patent Attorney Uchihara Oto 4: Anisotropic I Hidden Thick Electric Slem 6: Blank A Refilm) 7 z lLCD/Viewer 1 and 2: LCD drive board s: tsr! fJj wet frost belly 6: 4I Jun-kei turn Z diagram (and l, n 1: LCD path sequence 1 and Z: LCD! EttJa 4: different chaos raw conductivity sum 3rd Cb) ￥LSI 6: A side pattern 7: LCD panel #j1 child diagram

Claims (1)

[Claims] An anisotropic conductive film is interposed between the terminals of the liquid crystal display panel and a conductor pattern provided on the liquid crystal display drive board so as to correspond to the panel terminals, and the anisotropic conductive film is superimposed and heated and pressed from the back of the liquid crystal display drive board. In the connection structure of a liquid crystal display drive board that connects a panel terminal and the conductive pattern, a moisture-proof resin is applied to the back of the liquid crystal display drive board, a sliding film is provided on the surface of the moisture-proof resin, and the liquid crystal display panel and the sliding A connection structure for a liquid crystal display drive board, characterized by comprising a shield case structured to sandwich a film.