JPH03242682A - Package structure of display panel - Google Patents

Abstract

PURPOSE:To reduce the installation space by providing a display panel mount part and a back light storage part to a holder fitted to an equipment case, and adhering a back light to the back light storage part. CONSTITUTION:A liquid crystal panel 1, the back light 2, the holder 3, a carrier tape 4, and a flexible connector 5 are formed in a module. When this module is incorporated in the equipment case, the module is fitted to the equipment case with screws inserted into screw insertion holes 36 of the holder 3. Then connection terminal 54 of a flexible connector 5 is soldered to or inserted into the circuit board connection terminal of a control circuit part stored in the equipment case to connect the liquid crystal display panel 1 electrically to a circuit board through the carrier tape 4 and flexible connector 5. Consequently, the installation space is reducible.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention applies to electronic equipment equipped with a display panel. [Technical Background] Conventionally, in electronic equipment equipped with one display panel, the connection between the display panel and the circuit board The overlapping state is held in a holder with an interconnector interposed between them, and the holder is attached to the equipment case with screws, and the display panel is electrically connected to the circuit board. The interconnector used at this time is a zebra-type one in which conductive rubber and insulating rubber are arranged alternately to form a square rod shape, and it is interposed between the connection terminal of the display panel and the connection terminal of the circuit board. .

However, in the mounting structure of such a display panel,
The square rod-shaped interconnector interposed between the display panel and the circuit board is thicker, and furthermore, the assembly of the interconnector cannot be done visually, making the work difficult.

In addition, even if such a structure is adopted, it may be possible to assemble EL (electroluminescent) panels, LED (light emitting diode) panels, etc./Herculite between the display panel and the holder. There is.

However, if such a structure is adopted, the mounting structure of the display panel becomes even thicker and the installation space becomes larger, which is disadvantageous. Moreover, regarding backlight assembly, for example, in the case of an EL panel, the lifespan is 150 years.
Since the lifespan is only 0 to 2000 hours, the lifespan is shorter than that of the display panel, and when replacing the backlight, which has a short lifespan, a problem arises in that the display panel fixed to the holder by adhesive must be destroyed.

Therefore, recently, the display panel is fixed to the holder by W-bonding, and one end of the carrier tape equipped with the drive circuit IC chip for driving the display panel is directly bonded to the display panel, thereby reducing the overall thickness. Improvements in assembly and assembly workability are being considered. In addition to such a structure, consideration has also been given to assembling a backlight made of an EL panel, an L E n panel, or the like between the display panel and the holder.

[Problems to be Solved by the Invention] By the way, in the conventional display panel mounting structure in which a rectangular bar-shaped interconnector is interposed between the display panel and the circuit board, the interconnector becomes thick, and the display panel and the holder are In a structure in which a backlight is assembled between the two, the thickness becomes even thicker, which is inconvenient. Moreover, the work of assembling the interconnector is not easy, and furthermore, the assembling of the backlight is not easy because it involves the trouble of replacing the backlight.

This invention was made against this background, and its purpose is to reduce the thickness of the mounting structure of the display panel and improve the assembly workability, and to improve the assembly of the backlight and diffuser plate. The purpose of this method is to make the display panel uniform in brightness and to fix it without having to replace the backlight.

[Means for Solving the Problems J] In order to solve the above-mentioned problems, the present invention provides a holder attached to an equipment case with a display panel mounting part and a Herraclite storage part, and a diffusion plate is mounted on the bottom surface of the display panel mounting part. The periphery of the lower surface of the display panel laminated on the display panel is adhered, Herculite is adhered to at least one side of the draw light housing, and one end of the carrier tape provided with the IC chip for the drive circuit of the display panel is attached. It is designed to be connected to the connection terminal of the display panel.

[Function] According to the present invention, the display panel and the circuit board are electrically connected through the thin carrier tape, so that the installation space can be reduced, and one end of the carrier tape can be displayed. It is only necessary to connect it to the connection terminal of the panel, which simplifies the assembly work.Furthermore, a diffusion plate is laminated on the bottom surface of the display panel and glued to the display panel mounting part of the holder.
By arranging and gluing a backlight to the Herculite housing, the entire display on the display panel can be uniformly brightened.

[Example] Hereinafter, the present invention will be described in detail with reference to Examples.

FIGS. 1 and 2 show essential parts of a display panel mounting structure in an embodiment of the present invention.

In this display panel mounting structure, the liquid crystal display panel l,
The backlight 2, halter 3, carrier tape 4, and flexible connector 5 have a modular structure. Among these, the liquid crystal display panel l is housed with the liquid crystal 13 sealed between two glass substrates 11 and 12 by a sealing member 14, and connecting terminals 15 are provided on the lower surface of the exposed end of the upper glass substrate 11. The structure is equipped with

The diffusion plate 1O is a flat plate that diffuses and transmits light, has approximately the same shape as the lower glass substrate 12 of the liquid crystal display panel 1, and is laminated and integrated with the lower surface of the lower glass substrate 12 using an adhesive 24. It is something that

The puncture light 2 consists of a long and narrow LED panel made up of a wiring board with LEDs (light emitting diodes), and is equipped with two wires 21 and 22.

The holder 3 is made of synthetic resin, and is provided as a recess or a display panel mount 4i section 32 on the top surface of a rectangular flat holder body 31 for housing the liquid crystal display panel 1, and further extends downward from the display panel mounting section 32. A punk light storage section 33 for four people is provided. And /Heraklite storage af! 33 has a sloped bottom surface 1. <Ivy Light 2
Place the side where it will be glued the deepest, /<Ivy Light 2
A wiring notch 39 for drawing out the wires 21 and 22 is provided at the edge near the deepest side. A reflective layer made of a reflective plate or white paint is provided on the inclined surface of the puncture light storage section 33. This is how it happens/
The shoulder surface of the head light storage section 33 forms the display panel mounting section 32. On the other hand, the Holter main body 31 is provided with a carrier tape accommodating portion 34 which is removed from the edge of the display panel tower J1 portion 32 on the lower surface, and the upper portion is used as a connection accommodating portion of the carrier tape with the connection terminal 15 of the display panel. The lower part is a carrier tape storage portion bent toward the holder main body 31fi surface.

I
A C chip storage section 35 is provided. The holder body 31 also has a mounting protrusion 3 having a screw insertion hole 36 at 41 m.
7 is provided, and a leg portion 38 is provided at the bottom of this mounting protrusion 37.

The carrier tape 4 includes a tape body 41 made of a resin film. A reed pattern made of metal foil is formed on the lower surface of the tape body 41, and a finger reed 43 is provided to protrude from an opening 42 formed in the center. Further, a connection terminal 44 is provided at one end of the tape body 41.
A connecting terminal 46 is provided to bridge the opening 45 formed at both ends of the other end. this house.

The finger lead 43 has an I disposed above the opening 42.
The bump electrodes 48 of the CC song 7 are joined by thermocompression bonding. This joint portion is edged by a sealing member 49 made of resin.

Note that the tape body 41 has a flat plate shape before being assembled, but during assembly, which will be explained later, the tape body 41 is sometimes provided with leads 40 at two locations so that it can be easily bent along a predetermined side surface of the holster 3.
All but one slit 402 are provided.

The flexible connector 5 is composed of a base film 51 made of a resin film, a lead pattern (not shown) made of metal foil formed on the upper surface of this base film 51, and an insulating layer 52 covering this lead pattern. ing. Then, the insulation M52 is removed from the locations corresponding to the connection terminals 46 of the carrier tape 4 and the locations where the two lead wires 21 and 22 of the Notestarite 2 are connected, thereby exposing the connection terminals 53 and 531. ing. Furthermore, a connection terminal 54 is exposed at one end of the flexible connector 5 and is connected to a control circuit section housed in an equipment case (not shown).

Although the connection terminal 53 is solder-plated (not shown), if the connection terminal 46 of the carrier tape 4 is solder-plated, it will be gold-plated.

Next, a case will be described in which one or more parts are modularized.

In this case, first, a diffusion plate 1O is bonded to the outer surface of the lower glass substrate 12 of the liquid crystal display panel 1 with an adhesive 24.Next, the flat tape body 4 of the carrier tape 4 is
The connecting terminal 44 at one end of the liquid crystal display panel 1 is bonded to the connecting terminal 15 of the liquid crystal display panel 1 via a conductive adhesive 6. The conductive adhesive 6 is an anisotropic conductive adhesive that is made by mixing conductive particles into an insulating adhesive, and exhibits conductivity in the thickness direction but insulating properties in the plane direction in the bonded state. be. The insulating adhesive is preferably a hot-melt type made of a thermoplastic resin, but is not limited to this, and is made of a thermosetting resin that is melted and then cured during thermocompression bonding as described below. In addition, the fine particles for conduction include metal particles such as Au, Ag, Cu, Ni, and AI;
or carbon particles, or conductive fine particles with a conductive film formed on the surface of insulating particles such as inorganic or organic particles, etc.
In addition to this, the outer peripheral surface of the conductive fine particles described above is covered with an electrically isolating resin layer, and during thermocompression bonding, the resin layer in the thickness direction is destroyed and the conductive surface is exposed, and the resin layer in the surface direction is The fine particles for conduction may be those that remain as they are without being destroyed.
It's about the same size. In the case of using such a conductive adhesive 6, when it is pressurized and heated, the connection terminal 44 of the tape body 41 is electrically connected to the connection terminal 15 of the liquid crystal display panel l when viewed. Note that this conduction Mi
It goes without saying that the bonding can also be achieved by simple soldering, etc., without using the adhesive 6.

Next, there is also a long and narrow LED panel Nortustarite 2 installed on the deepest side of the backlight storage section 33 of the holder 3.
is placed and attached to the inner wall surface of the holder 3 with adhesive 23, and the two lead wires 21 and 22 of the pack line 12 are drawn out from the wiring notch 11139 of the holder body 31.

Next, the carrier tape 4 bonded to the liquid crystal display panel l
While storing the connection terminals 44 of the tape body 41 in the carrier tape housing 34 on the upper part of the holder 3, insert the bottom circumferential surface of the liquid crystal display panel l on which the diffuser plate lO is stacked into the shoulder part of the backlight housing 33. It is attached to the display panel tower section a 32, which is a surface and the edge on which the display panel l is mounted, via a double-sided adhesive tape 61. Furthermore, carrier tape 4
While the tape body 41 is aligned along the predetermined side surface of the holder 3 that has been cut out to form the carrier tape storage section 34, the tape body 41 is inserted into the two slits 402.
The tape is folded and stored in the lower carrier tape storage section 34 on the back side of the holder 3. In this state, overlap the two wooden leads w7A21.22 of the backlight 2 with the top surface of the base film 51 of the flexible connector 5 on the bottom surface of the flat tape body 41 of the carrier tape 4 of the flexible connector 5, and connect the tape body 41. The terminal 46 is joined to the solder-plated connection terminal 53 of the base film 51. Thereafter, the IC chip 47 is adhered and stored in the IC chip storage portion 35 of the holder 3 using double-sided adhesive tape 62, and the upper surface of the base film 51 of the flexible connector 5 is fixed at a predetermined location on the holder body of the holder 3. 31 through a double-sided adhesive tape 63. In addition, the tape body 4
1 may also be adhered to the carrier tape storage section 34 at the bottom via a double-sided adhesive tape.

Thus, the liquid crystal display panel l, the backlight 2, the holder 3, the carrier tape 4, and the flexible connector 5 are modularized, but when this modularized product is assembled into an equipment case (not shown), The holder 3 is attached to the device case using a screw (not shown) inserted into the screw insertion hole 36 of the holder 3. Then, by soldering or inserting the connection terminal 54 of the flexible connector 5 into the circuit board connection terminal of the control circuit section housed in the equipment case, the liquid crystal display panel l is connected.
It will be electrically connected to the circuit board via the carrier tape 4 and the flexible connector 5.

In the above embodiment, the backlight 2 is arranged only on one side of the backlight storage section 33, but the backlight 2 may be arranged on both opposing sides of the heratalite storage section 33. It is possible, and in that case, it is desirable that the bottom surface of the backlight housing section 33 has a #4 slope that is shallower in the center and deeper toward both sides.

Furthermore, by using an LED panel for the backlight, the lifespan of the LED panel is over 50,000 hours, which is approximately the same as the lifespan of a liquid crystal display panel, so a mounting structure that does not require replacement of the backlight should be used. I can do it.

[Effects of the Invention] As explained above, according to the present invention, the display panel and the circuit board are electrically connected via the thin carrier tape, so the installation space for these can be reduced. Moreover, since it is only necessary to join one end of the carrier tape to the connection terminal of the display panel, the assembly work becomes easy. Furthermore, a diffusion plate is laminated on one display panel, and a backlight that does not need to be replaced is adhesively fixed to the backlight housing, so that the display surface of the display panel can be uniformly brightened. Furthermore, since there is no need to replace the backlight, there is no need to worry about replacing the backlight or destroying the display panel.

3...Holder, 4...Carrier tape, 5...Flexible connector, 6...
・Conductivity adhesive, 10...Diffusion plate, 15.44
... Connection terminal, 32 ... Display panel mounting section, 33 ... Backlight storage section, 47 ...
...IC chip.

Claims (1)

[Claims] A holder attached to an equipment case is provided with a display panel mounting part and a backlight storage part recessed downward from the display panel mounting part, and the bottom surface of the display panel with a diffusion plate laminated on the bottom surface is provided in the display panel mounting part. At the same time as bonding the surrounding area, a backlight is bonded to at least one side of the backlight storage section, and further, one end of the carrier tape provided with the IC chip for the drive circuit of the display panel is bonded to the connection terminal of the display panel. A display panel mounting structure characterized by: