JPH05188390A - Wiring structure of display device - Google Patents

Abstract

PURPOSE:To save substrate parts which are to be separately prepd. for signal and power source wirings and to be matched and connected by supplying required signals respectively and commonly via wirings to an IC substrate for drive to be matched and connected to one side of a display panel part. CONSTITUTION:A leading out part 20 for electrodes formed of ITO and wirings 27 formed with thick film printing of Ni, etc., as patterns for input and output of data between anode driver ICs 22 and patterns of input power source lines, etc., are formed at the anode glass end of the display panel part 25. The anode driver ICs 22 are connected with transfer bumps to TAB film parts 21 and an epoxy resin is applied as a sealant thereon from above. The terminals for input and output to and from the adjacent driver ICs and the terminals 24 for the input power source lines, etc., and the terminals 26 for high-voltage side output for lighting the display part are arrayed on one side of the TAB film parts 21 in compliance with the pitches of the terminals constituted at the anode end of the panel part 15. Gold plating is applied on the pressure contact parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal and power wiring structure in a display device.

[0002]

2. Description of the Related Art FIG. 3 shows a connection portion between a panel portion and a display drive circuit in an example of a conventional display device, and a partially enlarged view thereof is shown in FIG.

First, in FIG. 3, the display device generally includes a display panel section 16 and a driver chip 12 as a TAB.
It is composed of a TAB film portion 11 formed by mounting with a bump or the like by a method and a printed wiring board portion 13 for input / output of a driver chip 12.

The display panel portion 16 is formed with a matrix-patterned electrode lead-out portion 10, which is located at a portion 17 of the patterned conductor on the TAB film portion 11 on the output side of the driver IC. They are aligned and connected with an anisotropic conductive film or the like.

Further, as shown in FIG. 4, the TAB film portion 1
The input side portion 15 of the driver IC of the conductor pattern on 1 and the pattern on the printed wiring board portion 13 are aligned and connected by soldering or the like.

In FIG. 4, it is assumed that each input data is sent in the direction of the arrow. The conductor patterns 15a to 15c on the TAB film portion 11 are connected to the logic side of the driver IC 12a. In this example, the pattern 15a is a display data input line, the pattern 15b is a common line such as a power supply line, and the pattern 15c is a driver IC.
12a is an output line for sending the display data shifted by the shift register inside 12a to the next driver IC 12b.

In this way, the display data or operation data is output from the driver IC 12 to the high voltage side according to the input data.

[0008]

However, in the case of the pattern wiring as described above, the method of inputting / outputting the logic between the TAB film portions 11 is through the printed wiring board portion 13, which increases the member cost and the processing cost. Also T
There was a problem in the space for accommodating the AB film portion 11 and the printed wiring board portion 13 on the back side of the display panel portion 16.

The present invention increases the member cost and the processing cost when the printed wiring board portion 13 described above is produced and processed,
Another object of the present invention is to provide an excellent display device which eliminates the problem of the storage space and which does not require the printed wiring board portion 13 at a low cost, saves space, and is lightweight.

[0010]

According to the present invention, a wiring for exchanging logic data between respective driver ICs in a display device and a wiring such as a power supply line common to the driver ICs are formed in a display panel section.

[0011]

1 is a plan view showing an embodiment of a wiring formed according to the present invention, and FIG. 2 is an enlarged view of a part thereof.

This embodiment shows a case where the present invention is applied to an anode drive circuit portion of a plasma display device.

As shown in detail in FIG. 2, the display panel section 25
Wiring 27 formed by thick film printing of Ni or the like as a pattern for inputting / outputting data between the electrode lead-out portion 20 made of ITO and the anode driver IC 22 and a pattern of an input power supply line, etc. at the end of the anode glass And are formed.

Further, an anode driver IC 22 for a plasma display panel is connected to the TAB film portion 21 by a transfer bump, and an epoxy resin is applied as a sealing material on the anode driver IC 22.

On one side of the TAB film portion 21, there are provided a terminal 24 for input / output with an adjacent driver IC, a terminal 24 such as an input power source line, and a terminal 26 for high voltage side output for lighting the display portion. The parts are arranged in accordance with the terminal pitch formed at the anode end of the part 25, and the crimping part is plated with gold.

The display panel portion 25 and the TAB film portion 21 are thermocompression-bonded by the thermosetting epoxy-based anisotropic conductive film 23, and a UV-curing acrylic resin is applied thereon for sealing and fixing the pressure-bonding portion. In this way, the device of this embodiment is manufactured.

Next, the driving of this device will be described.
In FIG. 2, the data is shifted from left to right in the figure, but the flow of the display data is 24 on the TAB 21a.
The data input from the line a is shifted in the shift register in the driver IC 22a by the clock,
Finally, it is output from the IC 22a, passes through the pattern 24c on the TAB 21a, enters the TAB 21b on the right side through the pattern 27 on the display panel portion, and is sequentially shifted by the same operation as described above. Further, a common signal such as an input power source and a clock of the driver IC is input from 24b on the TAB 21a, is input to the driver IC 22a, and is transmitted through the pattern 27 on the display panel section to all the I on the right.
Input to C22 at the same time. In this embodiment, since there are a plurality of common signals, a double-sided pattern TAB is used in order to prevent a short circuit between the signals.

In this way, each driver IC2
Each data input to 2 is output to the high voltage side terminal 26 together with the latch signal and displayed.

[0019]

As described above in detail, according to the present invention, a pattern formed on the display panel side can be applied to a common signal and a signal between driver chips without using a dedicated separate substrate. Since it is used, it is possible to reduce the material cost of the common substrate and the processing cost for aligning the TAB film and the common substrate and soldering. In addition, the storage space for such a separate substrate is not required, and the size and weight of the conventional product can be reduced.

[Brief description of drawings]

FIG. 1 is a partial plan view showing an embodiment of the present invention.

FIG. 2 is a partial enlarged view of a partial plan view showing an embodiment of the present invention.

FIG. 3 is a partial plan view showing a conventional technique.

FIG. 4 is a partially enlarged view of a partial plan view showing a conventional technique.

[Explanation of symbols]

 20 Anode Electrode Extraction Part 21 TAB Film Part 22 Anode Driver IC 24a Common Signal Wiring 24b Display Data Wiring 25 Display Panel Part 26 Output Terminal 27 Wiring

Claims (1)

[Claims] 1. A display panel section and a driver IC respectively
In a display device including a plurality of boards on which the ICs are mounted, the boards being aligned and mounted on one side of the display panel unit, supply of signals and power source common to the IC and the I
A wiring structure of a display device, wherein data is input and output between Cs via a wiring provided in a portion corresponding to between the adjacent substrates on one side of the display panel section.