JP3525101B2 - Liquid crystal display element and liquid crystal display device - Google Patents

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 and a liquid crystal display device in which a driver IC is connected to the liquid crystal display device.

[0002]

2. Description of the Related Art In a conventional liquid crystal display device, a package 16 in which an IC chip is mounted on a TAB as shown in FIG. It was soldered to and was connected to the liquid crystal display element 1 by a rubber connector 14 or a thermocompression flexible connector (hereinafter referred to as heat seal). Alternatively, as shown in FIG. 4, the segment TAB tape 17 and the common TAB tape 18 were connected to the liquid crystal display element by the anisotropic conductive film 5. Here, the liquid crystal display element refers to a portion in which liquid crystal is sandwiched by a pair of electrodes, and the liquid crystal display device refers to the entire portion including a driver portion.

[0003]

The prior art described above necessarily requires a PCB as shown in FIG. 3, and a rubber connector or heat seal is required for connection with the liquid crystal display element. Alternatively, at least two types of TAB tapes are required as shown in FIG. Therefore, the structure becomes complicated, the number of parts increases, and the cost becomes high. 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]

A liquid crystal display device according to the present invention is a liquid crystal display device having a plurality of first electrodes and a plurality of second electrodes arranged to face each other, wherein the plurality of first electrodes and the plurality of first electrodes are provided. The second electrodes are respectively connected to a plurality of first terminals and a plurality of second terminals arranged side by side on one side of the liquid crystal display element, and the plurality of second electrodes are arranged along the one side direction. The plurality of first electrodes are arranged so as to intersect the plurality of second electrodes, and the plurality of second terminals are a third terminal and a fourth terminal.
A plurality of first terminals sandwiching the third terminal and the fourth terminal, and a second electrode connected to the third terminal is a second electrode connected to the fourth terminal. It is characterized by being sandwiched between.

[0005]

According to the present invention, since the second terminal is distributed to both sides of the first terminal, the display area can be located at the center position of the liquid crystal display element. Moreover, since the electrode connected to the third terminal is sandwiched between the electrodes connected to the fourth terminal,
The difference in wiring length between the electrode connected to the third terminal and the electrode connected to the fourth terminal adjacent to each other is reduced.

[0006]

[Embodiment 1] An embodiment of the present invention will be described with reference to FIG. For ease of explanation, the number of segment electrodes is 5, and the number of common electrodes is 3. 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. The common electrode 3 is arranged along the side to which the TAB tape 8 is connected, and the segment electrode 2 is the common electrode 3
It is arranged to intersect with.

Then, the segment output voltage is the driver I
It is transmitted from C7 to the pattern of the TAB tape 8 and is transmitted to the segment electrode 2 through the anisotropic conductive film 5. The common electrode 3 is shown by a solid line because it is on the front side in FIG. 1, and the segment electrode 2 is shown by a broken line because it is on the back side. 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. Then, it is transmitted to the opposing common electrode 3 by the vertical conducting agent 4. TAB tape 8
Is arranged in a plane (0 °) with the liquid crystal display device.
The flexibility which is the characteristic of the AB tape may be used to bend and arrange it by 90 ° or 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 a segment output and a common output, but in FIG. 2, the driver ICs 10 and 1 each have a single type of output.
A combination of 1 and 12 is used. Driver I
C10 has only segment output and driver IC1
1 and 12 have only common output. The liquid crystal display element 1 is mechanically and electrically connected by the anisotropic conductive film 5 to the TAB tape 8 on which the driver ICs 10, 11 and 12 are mounted.

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

[0010]

As described above, according to the present invention, (i) the plurality of second terminals include the third terminal and the fourth terminal, and the plurality of the first terminals are sandwiched between the third terminal and the fourth terminal. Tera, (i
i) Since the electrode connected to the third terminal is sandwiched between the electrodes connected to the fourth terminal, it is possible to set the display area at the center position of the liquid crystal display element, and as a result, the design is balanced. It is possible to realize a separated liquid crystal display element, and it is possible to realize wiring between the first electrode and the first terminal, between the second electrode and the third terminal, and between the second electrode and the fourth terminal. The wiring between can be shortened. Furthermore, an electrode connected to the third terminal adjacent to each other and a fourth electrode
The difference in the wiring length between the electrodes connected to the terminals is reduced, and there is no part of the screen where the brightness changes abruptly.
A liquid crystal display device with good display quality is realized.

[Brief description of 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 second embodiment in which a plurality of driver ICs are used in the liquid crystal display device of the present invention.

FIG. 3 is a 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 symbols]

1. Liquid crystal display device 2. Segment electrode 3. Common electrode 4. Vertical conduction agent 5. Anisotropic conductive film 6. Segment terminal 7. Driver IC (for both common and segment) 8. TAB tape 9. Input terminal 10. Segment driver IC 11. Common driver IC 12. Common driver IC 13. Holding frame 14. Rubber connector 15. PCB 16. Package (TAB mounting or lead frame +
Wire bonding) 17. TAB tape for segment 18. Common TAB tape 19. TAB input terminal for segment 20. TAB input terminal for common

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-4-107497 (JP, A) JP-A-3-209426 (JP, A) JP-A 64-48032 (JP, A) JP-A 2- 287434 (JP, A) JP-A-1-281430 (JP, A) JP-A-63-243915 (JP, A) Actual development 3-71382 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G02F 1/1345

Claims (2)

(57) [Claims] 1. A liquid crystal display device having a plurality of first electrodes and a plurality of second electrodes arranged facing each other, wherein the plurality of first electrodes and the plurality of second electrodes are on one side of the liquid crystal display device. Are connected to the plurality of first terminals and the plurality of second terminals arranged side by side, respectively, and the plurality of second electrodes are arranged along the one side direction,
Moreover, the plurality of first electrodes are arranged so as to intersect with the plurality of second electrodes, and the plurality of second terminals include a third terminal and a fourth terminal,
The plurality of first terminals are sandwiched between the third terminal and the fourth terminal, and the second electrode connected to the third terminal is
A liquid crystal display device characterized by being sandwiched between a second electrode connected to the fourth terminal. 2. A liquid crystal display device comprising the liquid crystal display element according to claim 1 and a driver IC connected to the liquid crystal display element.