JP3811583B2 - Structure of liquid crystal display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a driving IC chip is mounted on a liquid crystal display element formed by laminating liquid crystal between two flat substrates, and one end of a flexible flat cable for connection to the outside is fixed. It relates to the structure of a liquid crystal display device of the type.
[0002]
[Prior art]
Recently, as shown in FIG. 6 and FIG. 7, a liquid crystal display device used for a mobile phone or the like is a liquid crystal in which two flat substrates 2 and 3 made of a transparent material such as glass are encapsulated with liquid crystal sandwiched therebetween. When the display element 1 is configured, a protruding terminal portion 4 from one end surface 3a of the other flat substrate 3 is integrally provided on one flat substrate 2 of the two flat substrates 2 and 3, and this protruding terminal portion is provided. The driving IC chip 5 is mounted on the surface 4, and one end 6 a of the flexible flat cable 6 for connection to the outside is fixed.
[0003]
In order to reduce the size and weight of this type of liquid crystal display device, the width dimension W of the protruding terminal portion 4, that is, the protruding dimension from the one end surface 3a of the other flat substrate 3 is made as small as possible. It shall to such.
[0004]
In this case, in order to reduce the width dimension W of the protruding terminal portion 4, it is conceivable to decrease the width dimension S of the driving IC chip 5 mounted on the surface of the protruding terminal portion 4.
[0005]
[Problems to be solved by the invention]
However, since the driving IC chip 5 requires a surface area for forming a predetermined number of circuit elements, the driving IC chip 5 has a surface area for reducing the width W at the protruding terminal portion 4. When the width dimension S of the chip 5 is reduced, the length dimension L of the driving IC chip 5 must be increased. In other words, the driving IC chip 5 must be elongated. In the manufacturing process and in the mounting process to the protruding terminal portion 4, it frequently breaks, resulting in a high defect generation rate and an increase in cost.
[0006]
An object of the present invention is to provide a structure of a liquid crystal display device that solves this problem.
[0007]
[Means for Solving the Problems]
In order to achieve this technical problem, the present invention
“A liquid crystal display element in which two flat substrates are sealed with liquid crystal sandwiched between them, and one flat substrate out of the two flat substrates so as to protrude from one end surface of the other flat substrate. In a liquid crystal display device comprising an extended terminal portion, a driving IC chip mounted on the surface of the extended terminal portion, and a flexible flat cable having one end connected to the extended terminal portion,
The driving IC chip is configured into two driving IC chips having the same size, shape, and terminal electrode arrangement, and the two driving IC chips are changed in direction by 180 degrees with respect to each other. They are arranged in a line along one end face of the flat substrate. "
It was configured as follows.
[0008]
[Operation and effect of the invention]
Thus, by making the driving IC chip into two driving IC chips , the length dimension can be shortened while the width dimension of both the driving IC chips is reduced. By arranging the two driving IC chips in a line along one end surface of the other planar substrate, it is possible to avoid an increase in the width of the protruding terminal portion.
[0009]
Therefore, according to the present invention, there is an effect that the liquid crystal display device can be reduced in size and weight in a state where the occurrence of breakage in the driving IC chip can be reliably reduced.
[0010]
In addition, as the two driving IC chips, two driving IC chips having the same size, shape, and terminal electrode arrangement are used, and the two driving IC chips are changed in direction by 180 degrees. Although each driving IC chip can be manufactured as a single component by mounting, a plurality of common transparent electrodes and segment transparent electrodes in a liquid crystal display element, as will be described in detail later, and various wiring patterns from the driver IC chip, because it can be to the left and right symmetric shape of the sequences for the two driving IC chip, by forming these common transparent electrode and the segment transparent electrodes and various wiring patterns This can be done easily and the increase in cost can be avoided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0012]
In this figure, reference numeral 11 denotes a liquid crystal display element in which a front side flat substrate 12 made of a transparent material such as glass and a rear side plain substrate 13 are sealed with liquid crystal sealed between them. A large number of common or segment transparent electrodes 15 extending in the horizontal direction or the vertical direction are provided on the front side flat substrate 12 in the display element 11, and a large number of vertical or horizontal directions are provided on the rear side flat substrate 13. Each segment or common transparent electrode 16 is formed.
[0013]
The rear side flat substrate 13 is integrally provided with a protruding terminal portion 14 that is appropriately protruded from the one end surface 12a of the front side flat substrate 12 by a dimension W. The two driving IC chips 17 and 18 are mounted in a line along the one end surface 12 a of the front-side planar substrate 12.
[0014]
The protruding terminal portion 14 is formed with various wiring patterns 19 extending from the driving IC chips 17 and 18 on the surface 14a thereof, and one end portion 20a of the flexible flat cable 20 is connected to the flexible flat cable. Each electric wire 20 is fixed so as to be electrically connected to each of the various wiring patterns 19.
[0015]
In addition to making both the driving IC chips 17 and 18 have the same shape with the same width dimension S, length dimension L and height dimension, the multiple IC chips 17 and 18 are arranged from one end to the length L1. A plurality of terminal electrodes 17a, 18a connected to each of the half transparent electrodes 15 of the common or segment transparent electrodes 15 are arranged on the portion of the length L2 among the multiple segments or common transparent electrodes 16. A plurality of terminal electrodes 17b, 18b connected to each of the half transparent electrodes 16, and a terminal connected to each of the half wiring patterns 19 among the various wiring patterns 19 in the remaining length L3. The arrangement of the terminal electrodes is made the same for the two driving IC chips 17 and 18 such that the electrodes 17c and 18c are formed.
[0016]
When the two driving IC chips 17 and 18 having the same size, shape, and terminal electrode arrangement are mounted in a line on the surface 14a of the protruding terminal portion 14 in this way, a common or segment transparent electrode is mounted. The terminal electrodes 17a and 18a with respect to 15 are located outside, the terminal electrodes 17b and 18b with respect to the segment or common transparent electrode 16 are located in the center, and the terminal electrodes 17c and 18c with respect to various wiring patterns 19 are located inside. In addition, the direction is changed by 180 degrees and mounted.
[0017]
Further, each of the drive IC chips 17 and 18, using an anisotropic conductive film 21, 22 Kneaded conductive particles in the synthetic resin, the protruding with respect to the terminal portion 14, the respective terminal electrodes 17a, Each of 18a, 17b, 18b, 17c, and 18c is electrically connected to the common or segment transparent electrode 15, the segment or common transparent electrode 16, and various wiring patterns 19, and is fixed at the same time.
[0018]
As described above, since the two driving IC chips 17 and 18 are configured, the length dimension L can be shortened while the width dimension S of each driving IC chip 17 and 18 is reduced. Therefore, it is possible to reliably reduce the occurrence of breakage during the manufacturing process and during the mounting process to the protruding terminal portion 14 as compared with the case of forming a single driving IC chip. Since the driving IC chips 17 and 18 are arranged in a line along the one end surface 12a of the front side flat substrate 12, it is possible to avoid an increase in the width dimension W of the protruding terminal portion 14. is there.
[0019]
Furthermore, as shown in the figure, one end 20a of the flexible flat cable 20 is fixed to the end surface 14b of the protruding terminal portion 14 so that one end of the flexible flat cable is overlapped on the surface of the protruding terminal portion 14. Therefore, the width W of the protruding terminal portion 14 can be further reduced compared to the case where the liquid crystal display device is fixed, thereby reducing the size and weight of the liquid crystal display device.
[0020]
By the way, when the two driving IC chips 17 and 18 are mounted on the protruding terminal portion 14 without changing the direction by 180 degrees, half of the multiple common or segment transparent electrodes 15, Not only must a large number of segments or half of the common transparent electrode 16 intersect each other just before being connected to one of the driving IC chips 17 and 18, but also half of the various wiring patterns 19 should be routed long. Therefore, it is difficult to form a large number of common transparent electrodes and segment transparent electrodes and various wiring patterns from the driving IC chip on the liquid crystal display element 11.
[0021]
On the other hand, as described above, both the driving IC chips 17 and 18 have the same size and shape and the same arrangement of the terminal electrodes, and are mounted by changing the direction 180 degrees relative to each other. Thus, each of the driving IC chips 17 and 18 can be manufactured as a single component, but a large number of common or segment transparent electrodes 15 and segment or common transparent electrodes 16 in the liquid crystal display element, and various types Since the wiring pattern 19 can be arranged in a right-and-left object form with respect to the two driving IC chips 17 and 18, it is possible to avoid crossing and drawing around for a long time. Alternatively, the common transparent electrode 16 and various wiring patterns 19 can be easily formed.
[0022]
However, when configured in this way, a terminal for arbitrating the common signal is required so that the half of the multiple common transparent electrodes and the remaining half of the common transparent electrode do not turn ON at the same time. .
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is an enlarged sectional view taken along the line II-II in FIG.
FIG. 3 is a diagram showing a common transparent electrode, a segment transparent electrode, and various wiring patterns in the embodiment of the present invention.
FIG. 4 is an exploded perspective view showing a part of one driving IC chip in the embodiment of the present invention.
FIG. 5 is an exploded perspective view showing a portion of the other driving IC chip in the embodiment of the present invention.
FIG. 6 is a perspective view showing a conventional example.
7 is an enlarged sectional view taken along the line VII-VII in FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Liquid crystal display element 12, 13 Planar substrate 14 Overhang | projection terminal part 14a Surface 14b of an overhang terminal part End surface of an overhang terminal part 15 Common or segment transparent electrode 16 Segment or common transparent electrode 17,18 Driving IC
17a, 18a Terminal electrode for common or segment transparent electrode 17b, 18b Terminal electrode for segment or common transparent electrode 17c, 18c Terminal electrode for various wiring patterns 19 Various wiring patterns 20 Flexible flat cable

Claims (2)

A liquid crystal display element in which two flat substrates are sealed with liquid crystal sealed between them, and a protrusion integrally provided on one of the two flat substrates so as to protrude from one end surface of the other flat substrate In a liquid crystal display device comprising a terminal portion, a driving IC chip mounted on the surface of the protruding terminal portion, and a flexible flat cable having one end connected to the protruding terminal portion,
The driving IC chip is configured into two driving IC chips having the same size, shape, and terminal electrode arrangement, and the two driving IC chips are changed in direction by 180 degrees with respect to each other. A structure of a liquid crystal display device, which is arranged in a line along one end face of a flat substrate. In the description of the claim 1, the two driving IC chip, the protruding on the surface of the terminal portion, a liquid crystal display, characterized in that fixed in the anisotropic conductive film kneaded conductive particles in the synthetic resin The structure of the device.

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