JP2002287161A - Tab tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost liquid crystal display device by simplifying the structure. SOLUTION: In a TAB(tape automated bonding) tape mounting a driver IC, the pattern for segment output and the pattern for common output are lead from the driver IC and the ends of the segment output pattern and the common output pattern are arranged in a line along one side line of the TAB tape. The ends of the segment output pattern and the common output pattern are arranged in such a manner that one of them interposes the other along one side line of the TAB tape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device serving as a display section of a pager, a handy terminal or the like.

[0002]

2. Description of the Related Art In a conventional liquid crystal display device, as shown in FIG. 3, a package 16 in which an IC chip is mounted by TAB or a package 16 in which an IC chip is wire-bonded to a normal lead frame is printed wiring board 15 (hereinafter abbreviated as PCB). To the liquid crystal display element 1 by a rubber connector 14, a thermo-compression flexible connector (hereinafter referred to as a heat seal), or the like. Alternatively, as shown in FIG. 4, the segment TAB tape 17 and the common TAB tape 18 are connected to the liquid crystal display element by the anisotropic conductive film 5. Here, the liquid crystal display element indicates a portion where liquid crystal is sandwiched between a pair of electrodes, and the liquid crystal display device indicates the whole including a driver portion.

[0003]

The above prior art necessarily requires a PCB as shown in FIG. 3, and a connection with a liquid crystal display element requires a rubber connector or a heat seal. Or, as shown in FIG. 4, at least two types of TAB tapes were required. Therefore, the structure becomes complicated, the number of parts increases, and the cost increases. Therefore, the present invention solves such a problem, and an object of the present invention is to provide a low-cost liquid crystal display device with a simplified structure.

[0004]

According to the liquid crystal display device of the present invention, one driver IC is tape-automated bonding (hereinafter abbreviated as TAB), and both a segment output and a common output are connected to a row of connection terminals on one side of a TAB tape. And are connected to a liquid crystal display element at a time.

[0005]

The segment output and the common output of the driver IC mounted on the TAB tape are arranged in a row of connection terminals on one side of the TAB tape, and connected to the liquid crystal display element by an anisotropic conductive film or the like. The connection to the electrode facing the connected electrode is performed by a vertical conducting agent or the like.

[0006]

[Embodiment 1] An embodiment of the present invention will be described with reference to FIG. The number of segment electrodes is 5 for ease of explanation.
And the number of common electrodes is three. Needless to say, the number and shape of these electrodes can be arbitrarily selected according to the product. The liquid crystal display element 1 is mechanically and electrically connected to the TAB tape 8 on which the driver IC 7 is mounted and the anisotropic conductive film 5.

Then, the segment output voltage becomes equal to the driver I
C7 is transmitted to the pattern of the TAB tape 8 and transmitted to the segment electrode 2 via the anisotropic conductive film 5. The common electrode 3 is shown by a solid line because it is located in the front in FIG. 1, and the segment electrode 2 is shown by a broken line because it is on the back. On the other hand, the common output voltage is transmitted from the driver IC 7 to the pattern of the TAB tape 8, and is once transmitted to the segment terminal 6 via the anisotropic conductive film 5. Subsequently, it is transmitted to the opposing common electrode 3 by the vertical conductive agent 4. TAB tape 8
Are arranged in a plane (0 °) with the liquid crystal display device.
Taking advantage of the flexibility characteristic of the AB tape, the tape may be bent at 90 ° or may be bent at 180 °.

Embodiment 2 Another embodiment of the present invention will be described with reference to FIG. In the first embodiment, the driver IC 7 has both segment and common outputs, but in FIG. 2, the driver ICs 10 and 1 each have a single type of output.
1 and 12 are used in combination. Driver I
C10 has only segment output, driver IC1
1 and 12 have only a common output. The liquid crystal display element 1 is mechanically and electrically connected to the TAB tape 8 on which the driver ICs 10, 11, and 12 are mounted and the anisotropic conductive film 5.

In addition to the embodiments described herein, various combinations can be applied to individual products.

[0010]

As described above, the liquid crystal display element has a TA.
Since the liquid crystal display device is configured by connecting the B tapes collectively, a PCB is unnecessary. Even in the case where a plurality of conventional TAB tapes are used, the number of TAB tapes can be reduced by half, and the number of parts can be reduced. Therefore, the cost of parts and the number of steps can be reduced, and an inexpensive liquid crystal display can be realized. It also has the advantage of being small, lightweight and thin.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment in which one driver IC is used in a liquid crystal display device of the present invention.

FIG. 2 is a plan view of a liquid crystal display device according to a second embodiment of the present invention in which a plurality of driver ICs are used.

FIG. 3 is a cross-sectional view of a liquid crystal display device using a conventional rubber connector.

FIG. 4 is a plan view of a liquid crystal display device using two types of conventional TAB tapes.

[Explanation of Codes] Liquid crystal display device 2. Segment electrode 3. Common electrode 4. Top and bottom conduction agent Anisotropic conductive film 6. Segment terminal 7. 7. Driver IC for both common and segment TAB tape 9. Input terminal 10. Segment driver IC 11. Common driver IC 12. Common driver IC 13. Presser frame 14. Rubber connector 15. PCB 16. Package (TAB mounting or lead frame +
Wire bonding) 17. TAB tape for segment 18. TAB tape for common 19. TAB input terminal for segment 20. TAB input terminal for common

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[Procedure amendment]

[Submission Date] February 28, 2002 (2002.2.2)
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

[Title of the Invention] TAB tape

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

[0001] The present invention relates to a TAB tape.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003]

The above prior art necessarily requires a PCB as shown in FIG. 3, and a connection with a liquid crystal display element requires a rubber connector or a heat seal. Or, as shown in FIG. 4, at least two types of TAB tapes were required. Therefore, the structure becomes complicated, the number of parts increases, and the cost increases. Therefore, the present invention solves such a problem, and an object of the present invention is to provide a low-cost TAB tape with a simplified structure.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

The TAB tape of the present invention is a TAB tape on which a driver IC is mounted.
A pattern for segment output from the driver IC,
An end of the segment output pattern and the common output pattern is arranged along one side of the TAB tape, and one of the ends sandwiches the other. TAB tape characterized by the above-mentioned. In the TAB tape, a first driver IC for extracting a pattern for segment output
And a second driver IC from which a common output pattern is drawn out. The end of the segment output pattern and the end of the common output pattern are arranged along one side of the TAB tape. Are arranged so as to sandwich the other. In addition, the above T
In the AB tape, a plurality of the second driver ICs
Is mounted. Also, in the TAB tape, the first output pattern from which the first output pattern is drawn out.
And a plurality of second driver ICs from which a second output pattern is drawn,
The first driver IC is disposed so as to be sandwiched between the plurality of second driver ICs, and an end of the first output pattern and an end of the second output pattern are:
A first output pattern is arranged along one side of the TAB tape so as to be sandwiched between the second output patterns.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

As described above, since the liquid crystal display device is constructed by connecting the TAB tape of the present invention to the liquid crystal display element at a time, a PCB is not required. Conventional multiple T
Even when an AB tape is used, the number of TAB tapes can be reduced by half, and the number of parts can be reduced. Accordingly, the cost of parts and the number of steps can be reduced, and an inexpensive liquid crystal display device can be realized. It also has the advantage of being small, lightweight and thin.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment in which one driver IC is mounted on a TAB tape of the present invention.

FIG. 2 is a plan view of a second embodiment in which a plurality of driver ICs are mounted on the TAB tape of the present invention.

FIG. 3 is a sectional view of an example using a conventional rubber connector.

FIG. 4 is a plan view of an example using two types of conventional TAB tapes.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H092 GA33 GA41 GA48 GA49 GA51 MA32 MA35 MA37 NA13 NA15 NA17 NA27 NA28 NA29 PA06 5C094 AA15 AA44 BA43 DB03 EC01 HA10 5F044 NN13 NN19 5G435 AA17 AA18 BB12 EE37 EE40 EE42 LL

Claims (2)

[Claims] 1. A single driver IC is subjected to tape automated bonding (hereinafter abbreviated as TAB), and both a segment output and a common output are drawn out and arranged in a row of connection terminals on one side of a TAB tape, and are collectively connected to a liquid crystal display element. A liquid crystal display device characterized in that: 2. A liquid crystal display device according to claim 1, wherein a plurality of driver ICs are mounted by TAB.