JPH087423Y2 - Display panel mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a mounting structure of a display panel in an electronic device having a display panel.

[Background of Technology] -Conventional Technology-In an electronic device including a display panel, it is necessary to mount the display panel on a device case and electrically connect the display panel to a circuit board.

Conventionally, a display panel and a circuit board are held in a holder in a state of being overlapped with an interconnector interposed therebetween, and the holder is attached to a device case with a screw. The interconnector used at this time is a zebra type in which conductive rubber and insulating rubber are alternately arranged to form a square bar, and is interposed between the display panel connection terminal and the circuit board connection terminal. The panel and the circuit board are electrically connected. However, in the conventional mounting structure of such a display panel, since the square rod-shaped interconnector is interposed between the display panel and the circuit board, the interconnector becomes thicker by the amount corresponding to the interconnector, and the installation space for these becomes large. There was a problem that it would end up. Further, when the interconnector is interposed between the connection terminal of the display panel and the connection terminal of the circuit board, the interconnector cannot be visually observed, which causes a problem that the assembling work is difficult.

-Problems to be solved by the invention-Recently, an IC chip for a drive circuit for driving a display panel is attached to a carrier tape, and one end of this carrier tape is directly bonded to the display panel to reduce the overall thickness. And improving workability are being considered.

However, when adopting such a structure, the carrier tape joined to the display panel becomes an obstacle during the assembling work, is caught by some member, and is damaged,
There is a problem that the connection part with the IC chip peels off.

The present invention has been made in view of such a background, and an object thereof is to provide a mounting structure of a display panel capable of reducing the thickness and improving workability and ensuring reliability at the time of assembly. To do.

[Means for Solving the Problems] In order to solve the above problems, the present invention holds a display panel on a surface of a holder attached to a device case such that almost one surface of the display panel is supported. Then, one end of the tape on which the IC chip for the drive circuit for driving the display panel is attached is joined to the connection terminal of the display panel, and further, on the back surface of the holder, the tape storage portion where the tape is stored and the tape IC An IC chip storage unit for storing chips is provided.

[Operation] According to the present invention, the display panel and the circuit board are electrically connected to each other through a thin tape as compared with the conventional rectangular rod-shaped interconnector, and the tape is placed in the tape storage portion of the holder. Since the IC chip will be stored in the IC chip storage part as well as being stored, the display panel, the holder and the tape can be flattened and thinned. As a result, the installation space for these can be reduced, and it is only necessary to join one end of the tape to the connection terminal of the display panel, which facilitates the assembly work, and also the tape storage part and IC chip storage part on the back surface of the holder. Because it was provided,
To completely eliminate the problems that the tape gets in the way during assembly work, gets caught by some member and is damaged, or the connection part with the IC chip is peeled off, and the reliability during assembly is also improved. You can

[Embodiment] Hereinafter, the present invention will be described in detail with reference to an embodiment.

1 and 2 show the main part of the mounting structure of the display panel in one embodiment of the present invention.

In this display panel mounting structure, the liquid crystal display panel 1,
The holder 2, the carrier tape 3, and the flexible connector 4 are modularized. Of these, the liquid crystal display panel 1 has a liquid crystal display between two glass substrates 11 and 12.
13 has a structure in which it is housed in a state of being sealed by a sealing member 14, and a connection terminal 15 is provided on the lower surface of the end portion of the upper glass substrate 11.

The holder 2 is made of synthetic resin, and is mounted on the upper surface (front surface) of a rectangular flat plate-shaped holder body 21 with a liquid crystal display panel mounting portion.
22 is provided, a mounting piece 24 having a screw insertion hole 23 is provided above the four corners of the holder main body 21, and a leg portion 25 is provided below the four corners of the holder main body 21. The tape storage section 26 is provided on the lower surface (back surface) of the IC chip, and the IC chip storage section 27 is provided at a predetermined position of the tape storage section 26.

The carrier tape 3 includes a tape body 31 made of a resin film. A lead pattern made of a metal foil is formed on the lower surface of the tape body 31, so that the finger leads 33 are formed in the opening 32 formed in the central portion of the tape body 31.
Is provided so as to project, a connection terminal 34 is provided at one end of the tape body 31, and a connection terminal 36 is provided to bridge openings 35 formed at both ends of the other end of the tape body 31. Of these, the bump electrode 38 of the IC chip 37 arranged above the opening 32 is joined to the finger lead 33 by thermocompression bonding. This joint is a sealing member made of resin
It is sealed by 39.

The tape body 31 has a flat plate shape before being assembled, but can be easily bent at two predetermined places at the time of assembling described later. Therefore, the tape body
Linear openings 41 and 42 (see FIG. 1) are formed at predetermined two places of 31 from the end to the end.
In the parts 41 and 42, only the leads 43 and 44 which are bridged are connected.

In the flexible connector 4, the lead pattern made of a metal foil is formed on the upper surface of the base film 51 made of a resin film, and the insulating layer 52 is formed except for a part thereof. A connection terminal 53 is provided at the corresponding location, and a connection terminal is provided at one end.
54 is provided. The connection terminal 54 is connected to the control circuit unit housed in the equipment case. Also,
The connection terminals 53 are plated with solder (not shown). However, when the connection terminal 36 of the carrier tape 3 is plated with solder, the connection terminal 53 is plated with gold. The portions of these connection terminals 53 and 54 are exposed to the outside without being covered with the insulating layer 52.

Next, a case where the above components are modularized will be described.

In this case, first, the connection terminal 34 at one end of the flat tape body 31 of the carrier tape 3 is bonded to the connection terminal 15 of the liquid crystal display panel 1 via the anisotropic adhesive film 61.
The anisotropic adhesive film 61 is made by mixing conductive particles into the adhesive almost uniformly, and when heated under pressure, the connection terminals 34 of the tape body 31 are connected to the connection terminals of the liquid crystal display panel 1.
It will be glued in the state of being electrically connected to 15. Instead of using this anisotropic adhesive film 61, they may be joined by solder or the like.

Next, the upper surface of the base film 51 of the flexible connector 4 is overlaid on the lower surface of the flat tape body 31 of the carrier tape 3, and the connection terminal 36 of the tape body 31 and the connection terminal 53 of the base film 51 are connected to the connection terminal 53. Bonded through the applied solder plating. As a result, the liquid crystal display panel 1,
The carrier tape 3 and the flexible connector 4 are integrated, but the carrier tape 3 and the flexible connector 4 are integrated.
The liquid crystal display panel 1 and the carrier tape 3 may be joined after joining the and.

Next, almost the entire lower surface of the lower glass substrate 12 of the liquid crystal display panel 1 is adhered to the liquid crystal display panel mounting portion 22 of the holder 2 via the double-sided adhesive tape 62, whereby the lower glass substrate 12 is adhered.
Substantially the entire lower surface of 12 is supported by the holder 2. Next, while aligning the tape body 31 of the carrier tape 3 with a predetermined side surface of the holder 2, the two openings 41 of the tape body 31,
The leads 43, 44 in the portion 42 are bent at the upper edge and the lower edge of a predetermined side surface of the holder 2. Next, the tape main body 31 located on the lower surface side of the holder 2 is attached to the tape storage portion of the holder 2.
While being housed in 26, the IC chip 37 is housed by being adhered to the IC chip housing portion 27 of the holder 2 with the double-sided adhesive tape 63, and a predetermined portion on the upper surface of the base film 51 of the flexible connector 4 is held in the holder body of the holder 2. Double-sided adhesive tape on the underside of 21
Glue through 64. The tape body 31 may also be attached to the tape storage portion 26 via a double-sided adhesive tape.

Thus, the liquid crystal display panel 1, the holder 2, the carrier tape 3 and the flexible connector 4 are modularized. When the modularized product is assembled in an equipment case (not shown), the screw insertion hole of the holder 2 is inserted. When a screw (not shown) inserted through 23 is screwed into a screw hole provided in the equipment case, this modularized product is attached to the equipment case. Then, when the connection terminal 54 of the flexible connector 4 is soldered or inserted into the connection terminal of the circuit board (not shown) itself or the connection terminal for the circuit board which is separate from the circuit board, the liquid crystal display panel 1 becomes a carrier tape. 3 and the flexible connector 4 are electrically connected to the circuit board.

As described above, in this display panel mounting structure, the liquid crystal display panel 1 and the circuit board are electrically connected via the thin carrier tape 3 and the flexible connector 4 as compared with the conventional square rod-shaped interconnector. The tape body 31 of the carrier tape 3 is housed in the tape housing portion 26 of the holder 2, the IC chip 37 is housed in the IC chip housing portion 27, and the flexible connector 4 is arranged along the lower surface of the holder body of the holder 2. It is possible to flatten these parts to make them thinner, and consequently to reduce the installation space for these parts. If the tape body 31 of the carrier tape 3 serves as the connection terminal 54 of the flexible connector 4, the flexible connector 4 becomes unnecessary and the installation space can be further reduced.

Further, the connection terminal 34 of the carrier tape 3 and the connection terminal 15 of the liquid crystal display panel 1 are joined, the connection terminal 36 of the carrier tape 3 and the connection terminal 53 of the flexible connector 4 are joined,
Also, the connection between the connection terminal 54 of the flexible connector 4 and the connection terminal on the side of the circuit board can be performed all while visually observing, so that the assembling work is easy.

Further, since the holder 2 does not hold the circuit board,
The structure of the holder 2 can be selected regardless of the structure of the circuit board. Therefore, as long as the structure of the liquid crystal display panel 1 is the same even if the structure of the circuit board is different, the holder 2
It is not necessary to change the structure of No. 2 and the attachment mode of the holder 2 to the equipment case is not changed. Therefore, when the design of the equipment case is changed, there is no restriction on the design time.

Further, for the drive circuit for fixing the liquid crystal display panel 1 to the holder 2 by adhesion and driving the liquid crystal display panel 1.
Since the carrier tape 3 provided with the IC chip 37 is directly bonded to the liquid crystal display panel 1, the part including the liquid crystal display panel 1, the holder 2, the carrier tape 3 and the flexible connector 4 is modularized, and is used for various device cases. It can have sex.

[Effect of the Invention] As described above, according to the present invention, the display panel and the circuit board are electrically connected via the thin tape as compared with the conventional rectangular rod-shaped interconnector. While the tape is stored in the tape storage part of the holder
Since the IC chip is stored in the IC chip storage part, the display panel, the holder, and the tape can be flattened and thinned, which in turn can reduce the installation space for the tape and the tape. You only need to join one end to the connection terminal of the display panel, the assembly work becomes easy, and since the tape storage part and the IC chip storage part are provided on the back side of the holder, the tape becomes an obstacle during the assembly work, It is possible to completely solve the problem of being caught by some member and being damaged, or the connecting portion with the IC chip being peeled off, and the reliability at the time of assembly can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of a display panel mounting structure according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the display panel mounting structure. 1 ... Liquid crystal display panel, 2 ... Holder, 3 ... Carrier tape, 4 ... Flexible connector, 22 ... Liquid crystal display panel mounting section, 26 ... Tape storage section, 27 ... IC chip storage section, 31 ... … Tape body, 37 …… IC chip.

Claims (1)

[Scope of utility model registration request] 1. An IC chip for a drive circuit for holding a display panel on a surface of a holder attached to a device case so that almost one surface of the display panel is supported, and driving the display panel. In a mounting structure of a display panel in which one end of a tape to which is attached is joined to a connection terminal of the display panel, a tape storage portion in which the tape is stored, and an IC chip provided on the tape, on the back surface of the holder A mounting structure for a display panel, which is characterized in that an IC chip storage portion for storing the IC chip is provided.