KR100288366B1 - LCD - Google Patents

Abstract

The present invention can easily design and manufacture for equalizing the resistance values of all the coupling patterns even if the pattern widths of the plurality of coupling patterns are not calculated one by one, and the spacing between adjacent coupling patterns is locally narrow. The present invention provides a wiring pattern of a liquid crystal display device in which a layout of high reliability that is not supported can be selected without difficulty.

In the present invention, the group of the coupling pattern (5) is drawn from the group of the first coupling pattern (5a) and the lead pattern (4) group having a common pattern width (Wa), which is drawn at an angle from the transparent electrode (2) group and extends in parallel with each other. The first first pattern having the first coupling pattern 5a and the second coupling pattern 5b having a predetermined angle θ and having a common pattern width Wb, and having a maximum pattern length. Amax / Bmax = Wa / Wb was set when the length of the coupling pattern 5a was Amax and the length of the second coupling pattern 5b having the maximum pattern length was Bmax.

Description

LCD

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to an improvement in a coupling pattern group connecting a display pattern portion made of a transparent electrode group and a terminal portion made of a lead pattern group.

The cell substrate of the liquid crystal display device is formed with a plurality of transparent electrodes positioned in the display area as wiring patterns and extending in parallel to each other, or a plurality of lead patterns extending parallel to each other by surrounding the cell substrate edges from each transparent electrode. Generally, the pattern pitch side of the lead pattern group which consists of a terminal part is narrow compared with the pattern pitch of a transparent electrode group.

3 is an explanatory diagram showing a conventional example of such a wiring pattern. The wiring pattern shown in the same drawing includes a display pattern portion 1 consisting of a plurality of transparent electrodes 2 extending in parallel with each other, and a plurality of lead patterns extending in parallel with a pattern pitch narrower than the group of transparent electrodes 2. It is mainly composed of a terminal portion 3 consisting of (4), and a combination pattern 5 group connecting the transparent electrode 2 group and the lead pattern 4 group, respectively, and the length of each coupling pattern 5 By changing the inclination little by little, the group of transparent electrode 2 and lead pattern 4 in which pattern pitch differs is connected.

However, in the liquid crystal display device, it is necessary to set such that the electrical resistance between each transparent electrode 2 and each lead pattern 4 is not unbalanced for each coupling pattern 5 in order to avoid unevenness of brightness or color. Therefore, in the related art, in order to make all the resistance values of each coupling pattern 5 equal, the coupling pattern 5 having a longer pattern length is designed to have a wider pattern width. The task of calculating the pattern widths one by one and assigning them to the design drawings is not easy for the designer, but is also a complicated designation for the workers in the pattern production site.

In the conventional wiring pattern shown in Fig. 3, the pattern pitch at the terminal portion 3 side of the coupling pattern 5 group on the upper side of the same drawing having a large inclination angle with respect to the lead pattern 4 is higher than the lead pattern 4; It is narrower than the narrow pattern pitch of the group, and the group of these coupling patterns (5) is longer than the group of the coupling patterns (5) at the lower side of the same plane with a small inclination angle, so that the pattern width is wider, and thus the coupling patterns (5) having a large inclination angle between There is a disadvantage that the adjacent interval that can be secured is extremely narrow, which is likely to cause a short circuit accident.

The present invention is a coupling pattern group for connecting the transparent electrode group and the lead pattern group in the wiring pattern provided on the cell substrate and extends in parallel to each other and the same as the first coupling pattern group having a common pattern width. The second group of combination patterns having a common pattern width is continued at a predetermined angle. By adopting such a configuration, it is possible to easily design and manufacture to equalize the resistance values of all the coupling patterns even if the pattern widths of the plurality of coupling patterns are not calculated one by one, and the spacing between adjacent coupling patterns is localized. It made it possible to choose a layout of high reliability that does not narrowly.

1 is an explanatory diagram showing a wiring pattern of a liquid crystal display device according to an embodiment;

2 is a schematic plan view of the wiring pattern shown in FIG. 1;

3 is an explanatory diagram showing a wiring pattern of a liquid crystal display element according to a conventional example.

* Description of the symbols for the main parts of the drawings *

1 display pattern portion 2 transparent electrode

3: terminal part 4: lead pattern

5: coupling pattern 5a: first coupling pattern

5b: second coupling pattern 5c: bend

An, Bn: Pattern length Wa, Wb: Pattern width

In the liquid crystal display device of the present invention, a display pattern portion comprising a plurality of transparent electrodes extending in parallel to each other, a terminal portion consisting of a plurality of lead patterns extending in parallel with a narrower pattern pitch than the transparent electrode group, and the transparent electrode group And a coupling pattern group that connects the lead pattern group to each other, wherein the coupling pattern group is a first coupling pattern group having a common pattern width extending from the transparent electrode group at an angle and extending in parallel to each other, and the lead pattern group. Straight from the first coupling pattern group to form a predetermined angle to the second coupling pattern group having a common pattern width, and the pattern length is the maximum length of the first coupling pattern Amax, the pattern Amax / Bmax = Wa / Wb is set when the width is Wa, the length of the second coupling pattern having the maximum pattern length is Bmax, and the pattern width is Wb. It was.

Currently, the second combination pattern is successively formed on N total number of first combination patterns, and the combination pattern group is formed, and the nth number is counted from the first combination pattern having the largest pattern length (where n = 1, 2, 3,... N). When the length of the first coupling pattern of -1, N is An, the length of the second coupling pattern subsequent to this is Bn, and the area resistance is ρ, the nth first and second coupling patterns are continuously formed. The resistance value of one coupling pattern is ρ (An / Wa) + ρ (Bn / Wb). Since the first coupling pattern group and the second coupling pattern group, which are both parallel pattern groups, are continuous at a predetermined angle, and the ratio of the lengths of the corresponding sides of the triangles that are similar to each other is constant, An / Amax = 1. A relation of-(Bn / Bmax) is obtained. Therefore, if Amax / Bmax = Wa / Wb is set as described above, the resistance value of one coupling pattern formed by successive nth first and second coupling patterns does not depend on n, ρ (Amax / Wa). N coupling patterns are all set to the same resistance value. Therefore, the pattern width Wa common to the first combination pattern group and the pattern width Wb common to the second combination pattern group are calculated without the complicated work of calculating the pattern width of the N combination patterns one by one. It is possible to easily perform the setting operation indispensable for avoiding display mismatch, by simply making the resistance values of each coupling pattern the same.

In addition, the coupling pattern group is a pattern shape in which the bent portions of the first coupling pattern and the second coupling pattern at a predetermined angle are arranged along a straight line rather than perpendicular to the lead pattern group. Since the pitch of the second coupling pattern group is wider than that of the second coupling pattern group, the first coupling pattern group extending obliquely toward the transparent electrode group from the second coupling pattern group having the same pitch as the lead pattern group does not have to be formed with a very narrow pattern pitch. .

(Example)

1 is an explanatory diagram showing a wiring pattern of a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a schematic plan view of the wiring pattern, which is used in the description of the prior art. The same code | symbol is attached | subjected to the part corresponding to 3.

The wiring patterns shown in FIGS. 1 and 2 include a display pattern portion 1 comprising a plurality of transparent electrodes 2 extending in parallel with each other, and a plurality of patterns extending in parallel with a narrower pattern pitch than the group of transparent electrodes 2. It consists mainly of the terminal part 3 which consists of the lead pattern 4, and the coupling pattern 5 group which connects the transparent electrode 2 group and the lead pattern 4 group, respectively, and this coupling pattern 5 group Is drawn straightly from the group of the first coupling pattern 5a and the lead pattern 4 having a common pattern width Wa extending from the transparent electrode 2 group and extending in parallel to each other. The second coupling pattern 5b is formed of a group of second coupling patterns 5b which are continuous at a predetermined angle θ and have a common pattern width Wb. The first and second coupling patterns 5a and 5b have the maximum length of the first coupling pattern 5a as Amax and the maximum length of the second coupling pattern 5b as Bmax as the max. At this time, since the values of the pattern widths Wa and Wb are set so as to satisfy the relation that Amax / Bmax = Wa / Wb, the first coupling pattern 5a and the second coupling pattern 5b continuous to the pattern width Wa and Wb are formed. The resistance value of one coupling pattern 5 has the same value in all of the plurality of coupling patterns 5.

In other words, the second combination pattern 5b is successively connected to the first combination pattern 5a having the total number of N, and the combination pattern 5 group is formed and counted from the first combination pattern 5a having the maximum pattern length. An is the length of the first coupling pattern 5a of the second (where n = 1, 2, 3,..., N-1, N), and Bn is the length of the second coupling pattern 5b subsequent to this. When the resistance is ρ, the resistance value of one coupling pattern 5 formed by successive nth first and second coupling patterns 5a and 5b is ρ (An / Wa) + ρ (Bn / Wb). do. In addition, the group of the first and second coupling patterns 5a and the group of the second and second coupling patterns 5b, all of which are parallel pattern groups, are continuous at a predetermined angle θ, and the corresponding triangles ΔPQR and ΔTQU, which are similar to each other in FIG. Since the ratios of the lengths of the sides are constant and the ratios of the corresponding sides of the triangles ΔQRS and ΔURV which are similar to each other are also constant, the following relation holds between the lengths of the sides of these triangles.

TU / PR = UQ / RQ = 1- (RU / RQ) = 1- (UV / QS)

Since AN / Amax = 1- (Bn / Bmax) is obtained from the above equation, An / Wa = (Amax / Wa)-(AmaxBn / BmaxWa), and Amax / Bmax in this equation is If Wa / Wb is substituted according to the setting conditions, (An / Wa) + (Bn / Wb) = Amax / Wa. As is apparent from Fig. 1, An when n = 1, that is, Al is Amax, and Bn when n = N, that is, BN is Bmax.

Therefore, the resistance value of one coupling pattern 5 formed by successive nth first and second coupling patterns 5a and 5b is ρ (An / Wa) + ρ (Bn / Wb) = ρ (Amax / Wa). Or p (Bmax / Wb), which is a value regardless of n. In other words, all N coupling patterns 5 are set to the same resistance value.

As described above, in the present embodiment, the first coupling pattern 5a group and the second coupling pattern 5b group are continuous at a desired angle θ according to the space between the transparent electrode 2 group and the lead pattern 4 group. If the layout is selected, the pattern width Wa and the second combination which are common to the group of the first coupling patterns 5a are not required, even if the layout is not a complicated task of calculating the pattern width of the hundreds of N coupling patterns 5 one by one. Only by calculating the common pattern width Wb of the group of the patterns 5b, the setting operation which is indispensable for avoiding the display mismatch that the resistance values of the respective coupling patterns 5 are all the same can be easily performed. The burden on the operator of the ruler and the pattern production site is greatly reduced compared to the conventional one.

In the present embodiment, the coupling pattern 5 group includes a bending portion 5c in which the first coupling pattern 5a and the second coupling pattern 5b are formed at an angle θ with respect to the lead pattern 4 group. It is a pattern shape arranged along a straight line, not vertical, and the interval between adjacent bent portions 5c is wider than the pattern pitch of the second coupling pattern 5b group, so that the pitch of the same pitch as the lead pattern 4 group is made. The first coupling pattern 5a group extending obliquely from the two coupling pattern 5b group toward the transparent electrode 2 group does not need to be formed with a narrow pattern pitch. In this way, the group of the coupling patterns 5 composed of the first and second coupling patterns 5a and 5b is a layout in which the spacing between adjacent coupling patterns 5 does not narrow locally, that is, causes a short circuit accident. Difficult layout can be selected without difficulty, which can be said to be advantageous configuration can be improved.

In addition, in the above-described embodiment, although the group of the transparent electrodes 2 and the lead patterns 4 extend in the same direction, the group of the lead patterns 4 extending in the inclined direction with respect to the group of transparent electrodes 2 Since the group of coupling patterns 5 to be connected can be constituted by the first and second coupling patterns 5a and 5b such as changing the angle θ of the bent portion 5c, the present invention can be applied as it is. Of course.

The present invention is implemented in the form described above, and has the effect as described below.

Even if the pattern widths of the plurality of coupling patterns connecting the transparent electrode group and the lead pattern group are not calculated one by one, the setting operation indispensable for avoiding display mismatch can be easily performed. The burden on designers and workers at pattern production sites is greatly reduced compared to the conventional one.

In addition, since a layout in which the spacing between adjacent coupling patterns does not narrow locally can be selected without difficulty, a design that avoids a short circuit accident of the coupling pattern group can be easily performed.

Claims (1)

A display pattern portion comprising a plurality of transparent electrodes extending in parallel to each other, a terminal portion consisting of a plurality of lead patterns extending in parallel with a narrower pattern pitch than the transparent electrode group, the transparent electrode group and the lead pattern group, respectively Having a group of coupling patterns to connect, The coupling pattern group, which is drawn obliquely from the transparent electrode group and extends in parallel to each other, has a first coupling pattern group having a common width, and is directly drawn from the lead pattern group, and has a predetermined angle with the first coupling pattern group. The second coupling pattern has a common pattern width, and the second coupling pattern has a common pattern width, and the first coupling pattern having the maximum pattern length is Amax, the pattern width is Wa, and the pattern length is maximum. A length of Bmax and a pattern width of Wb are set such that Amax / Bmax = Wa / Wb, and the width of the first coupling pattern group is wider than the pattern pitch of the first combination pattern group.

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