KR20060110343A - Electronic device with bending wiring pattern - Google Patents

Abstract

An object of the invention is to provide a form of bending wiring patterns whose wiring resistances can be as equal as possible based on a simple structure and to provide an electronic device based on the form. An electronic device having a substrate (100) on which a plurality of conductive lines (10) are formed, the conductive lines (10) having such patterns that the lines are straightly extended from their predetermined front ends 1s and thereafter bend by turns in substantially the same direction for each predetermined interval P to further extend to the respective predetermined connection targets (30). The conductive lines (10) have their straightly-extending portions (10L) of varied line widths and a line width at a nearer position to a bending point (Q) of the line is larger than a line width at a farther position from the bending point (Q), so as to equalize at least resistance values of the straightly-extending portions (10L) of the conductive lines (10).

Description

ELECTRONIC DEVICE WITH BENDING WIRING PATTERN}

The present invention relates to an electronic device having a bending wiring pattern, in particular an electronic device having a plurality of electronic conducting lines having a bending wiring pattern which is particularly suitable for display panels and the like.

Electronic substrates on which a plurality of traces have been formed have been known for a long time, and the traces extend in a straight line from each front end portion, and are constantly curved in order to further extend to each connection object (see Patent Document 1, for example).

In Patent Document 1, the wiring width of the first wiring portion in the horizontal direction between the data electrodes or the scanning electrodes is wider than the wiring width of the second wiring portion in the vertical direction among the electrodes, thereby reducing the pattern resistance of each electrode. Therefore, the difference between the pattern resistance value is reduced due to the difference between the wiring lengths of the electrodes, thereby reducing the unevenness of luminance (paragraph number [0022] and [0024]).

This document also states that a compensation resistor is inserted between each electrode terminal and each electrode driver to compensate for the difference in pattern resistance due to the difference between the wiring length of the data electrode or the scanning electrode, while the resistance value of the compensation resistor is compensated for. It is noted that the sum of the resistance value of the resistor and the pattern resistance value of the electrode to which the compensation resistor is connected is equal to each other, causing compensation of the difference between the pattern resistance values due to the difference between the wiring lengths of the electrodes, and reducing the luminance unevenness. (Paragraph numbers [0022], [0023], [0025] and [0026]).

However, in the form of the former, the width of the wiring portion in the horizontal direction is made larger than the width of the wiring portion only in the vertical direction, and the resistance value is reduced throughout the substrate for all electrodes, and thus in the resistance between the electrodes. Although the change of is suppressed, it is insufficient to obtain the same resistance value of the electrode. In addition, in the latter form, a separate set of individual compensating resistors with appropriate resistance values between the electrode terminals and the corresponding drivers for each electrode must be provided separately, thus making the structure complicated and in terms of the number of components and the manufacturing process. Has an advantage.

[Patent Document 1]

Japanese Patent Application Publication No. 63198/98

(purpose)

SUMMARY OF THE INVENTION An object of the present invention is to provide a form of bending wiring pattern in which wiring resistance can be as similar as possible based on a simple structure, and to provide an electronic device based on such a form.

Another object of the present invention is to provide an electronic device having a plurality of electronic conductive lines having a bending wiring pattern particularly suitable for a display panel or the like, in which the conductive lines may be as identical as possible based on a structure with a simple wiring resistance. It uses a form of bending wiring pattern that can equalize the delay, amplitude or other quality of the signal transmitted over the conducting line.

(Configuration)

In order to achieve this object, an electronic device according to an aspect of the present invention is an electronic device having a substrate on which a plurality of conductive lines are formed, the conductive lines extending in a straight line from a predetermined front end and then each predetermined connection object. Having a pattern that in turn bends in substantially the same direction for each predetermined spacing to further extend into, the conducting line having a portion extending in a straight line of altered line width, the position of which is closer to the bending point of the line The line width is made larger than the line width at a point farther from the bending point to equalize at least the resistance value of the straightly extending portion of the conducting line.

According to this aspect, the resistance value of the conducting line is made equal based on the change in the line width in the linearly extending part constituting the main part of the conducting line, and thus the wiring resistance value is equally possible based on the simple structure. Can be made. Thus, it is possible to equalize the delay, amplitude and / or other quality of the signal transmitted over the conducting line.

In this aspect, the front end of the conducting line may be connected to the input / output of the drive circuit or peripheral circuit of the electronic device. By doing so, the resistance value is equalized at the portion extending straight from the input / output of the drive circuit or peripheral circuit to the conducting line.

In addition, the connection object of the conducting line may be a plurality of lines extending substantially parallel to each other at a predetermined interval, or the bending angle may be substantially perpendicular. In this way, the effects and advantages specified in the present invention can be exhibited completely.

In addition, the device includes a plurality of bus lines extending parallel to each other at predetermined intervals within a display area defined by at least one side and the other side facing each other, the bus lines being positioned from one side to another side. Preferably extend in a region outside the display area adjacent to at least one of one side and the other side. Accordingly, a region suitable for the arrangement of the conductive lines having the bending pattern according to the present invention can be defined in a region other than the display region on the substrate.

When the bus line is a row electrode line, ie a gate electrode line, or a column electrode line, ie a source electrode line, a more preferred embodiment is obtained.

In addition, the display area may also be defined by the third and fourth sides facing each other, and may be formed substantially perpendicular to one side and the other side, and the driving circuit or the peripheral circuit may be the third and fourth sides. It is provided in an outer region of the display region adjacent to at least one of the regions, thereby defining a region suitable for the arrangement of the conducting lines having a bending pattern according to the present invention, and a region suitable for the arrangement of the driving circuit or the peripheral circuit.

1 is a schematic plan view of a substrate used in an electronic device according to an embodiment of the present invention.

2 is a schematic enlarged partial view of a conducting line according to the embodiment of FIG. 1;

3 is a schematic partial enlarged view of a conducting line according to a variant of the invention.

Modes for calibrating the present invention will now be described in detail by the embodiments with reference to the accompanying drawings.

1 shows a schematic plan view of a substrate used in an electronic device according to an embodiment of the invention.

The substrate 100 of this embodiment is an LCD panel, which comprises a display-function section 1A in which the display area 1d is defined in a substantially central portion of the part 1A, and the angle of the display area 1d. A drive circuit (or peripheral circuit) 20 is provided for driving the pixels and performing other operations and has a drive-function section 1B provided adjacent to and parallel to the display-function section 1A.

In the display-function section 1A, a plurality of conducting lines 10 are formed on the side of the display area 1d. The conduction line 10 extends in a straight line (to the upper side of the drawing) from the predetermined front end 1s on the drive-function section 1B side and to each predetermined connection object on the side of the display area 1d. To further extend it has a pattern that is bent in turn in substantially the same direction (right or left of the drawing) with all the predetermined spacings P. The front end 1s of the conducting line 10 is connected to the input / output of the drive circuit 20 in the drive-function section 1B. The connection object of the conducting line 10 is a plurality of bus lines 30 extending parallel to each other at predetermined intervals in the display area 1d.

The bus line 30 serves as a row electrode line in the display area 1d having one side (first side) 1d1 and the other side (second side) 1d2 facing each other on the left and right sides of the drawing. And extend parallel to each other at predetermined intervals from the position of one side of the rectangular display area 1d to the position of the other side. The other bus line 31 is formed to intersect with the bus line 30. The bus lines 31 serve as column electrode lines in the display area 1d, and each other at predetermined intervals from one position to another between the third side 1d3 and the fourth side 1d4 of the rectangular display area. Extending in parallel, the third side and the fourth side are formed to face each other substantially at right angles to the first side 1d and the second side 1d2 and in the upper and lower positions of the figure.

In this embodiment, an active driving system, which uses a thin film transistor (TFT) as the pixel driving element, is introduced and the bus lines 30 and 31 are gate electrode lines and source electrode lines, respectively, and TFTs are generally bus lines ( Corresponding to the intersection of 30 and 31). Moreover, details of the structure and operation of the display area based on this active drive system are in various other publicly known documents and are omitted herein.

A straightly extending portion of the conducting line 10 is arranged in an area outside of the display area 1d, which is adjacent to the first side 1d1 and the second side 1d2 of the display area 1d. do. As shown in the figure, in the conduction line 10 thus arranged, the more outwardly located conduction line has a portion extending in a longer straight line. In addition, a more inner conducting line (i.e. near display area 1d) is connected to bus line 30 which is closer to drive circuit 20 (or drive-function section 1B), and subsequently, more The conducting lines arranged outwardly are connected to the bus line 30 further away from the drive circuit 20 (or the drive-function section 1B).

The conduction line 11 connected to the bus line 31 has no bending pattern specific to the conduction line 10 and has the shortest possible distance from the input / output end of the drive circuit 21 in the drive-function section 1B. To connect the bus line 31.

As can be seen in FIG. 1, in this embodiment, the drive circuits 20 and 21 are in the outer region of the display region 1d, ie in the present specification, close to the fourth side 1d4 of the display region 1d. It is formed in the region of the drive-function section 1B. In this way, by forming a circuit necessary for the LCD panel 100 only on the partial region of one side constituting the plane-outline of the LCD panel 100, the display area 1d can be formed efficiently. Can be. In addition, the form in which the drive circuitry is arranged on only one side can be very advantageous for some electronic devices to be used for some applications.

In addition, in this embodiment, the drive circuit 20 is arranged separately on both the left side and the right side of the drive-function section 1B. Then, the conductive line 10 connected to the circuit 20 exits the areas near the first side 1d1 and the second side 1d2 of the display area 1d and leads to the display area, alternately from left and right. It is connected to the bus line (30). In other words, this form is introduced in the direction of the top / bottom arrangement of the bus line 30, so that the bus line 30 is in the conduction line 10 in the region near one of the first side 1d1 and the second side 1d2. Adjacent bus line 30 is adapted to be connected to another conducting line 10 in the region near the other of the first side 1d1 and the second side 1d2. Accordingly, the spacing P of the bending point of the conducting line 10 can be made twice the spacing of the bus line 30, which provides an advantage in forming the pattern of the conducting line 10.

In this embodiment, the bus line 30 serving as the row electrode is connected to a conducting line 10 having a bending pattern as described above, and the conducting line 10 is formed by the method described below, and thus driving The conduction line resistance values between the output of the circuit 20 and the input of the bus line 30 are all made as equal as possible.

It is noted that the display-function section 1A and the drive-function section 1B may be formed in another substrate assembly or the same substrate assembly. For other substrate assemblies, the end of the conducting line is exposed to the outside of one of the two opposing substrates (display-function section 1A) in which the liquid crystal medium is sandwiched, the exposed end being an anisotropic conductive film (ACF). There is a method of using a film to connect with a conducting line from a drive circuit 20 formed on a film substrate (drive-function section 1B), such as a TAB film. On the other hand, in the case of the same substrate assembly, two opposing substrates sandwiching the liquid crystal medium include a display-function section 1A, and one of the substrates forms an area forming the end of the conducting line (drive-function section 1B). There is provided a method in which the drive circuit 20 connected to the end is mounted or formed in this area.

2 shows a partially enlarged view of the conducting line 10 to illustrate a more specific method of forming the conducting line 10.

FIG. 2 shows an enlarged form of the vicinity of the bending point of the conducting line 10 shown in FIG. 1 as a representative forming method. The outermost conducting line 101 is in this example shaped such that the outer edge of the straightly extending portion 10L is a straight line and the inner edge has a stepped shape for each predetermined spacing P. . This form is such that the line width at a position closer to the bending point Q is greater than the line width at a position farther from the bending point Q, in this embodiment, a straightly extending portion of the conducting line 101. The width of 10L varies for each predetermined spacing P (or whenever a bending point Q of another conducting line appears), satisfying the condition that the width is constant within the spacing.

Similarly, the other conducting lines 102, 103, ... have a line width at a position closer to the bending point Q than the line width at a position farther from the bending point Q, The width of the linearly extending portion 10L is shaped to satisfy the condition that it changes for each predetermined interval P (or whenever the bending point Q of the other conducting line appears). However, the straight outer edges of the conducting lines 102, 103,... Are formed with a conducting line 101 whose outer edge extends along a direction perpendicular to the arrangement direction (horizontal direction in the drawing) of the conducting line 10. In contrast, it is noteworthy that it extends in a direction parallel to the line connection edges which each substantially form a step of the stepped edge portion of the outer adjacent conducting line.

These conducting lines 101, 102, 103, .. change the line width of each linearly extending portion 10L and the line width closer to the bending point Q is at least the resistance value of the linearly extending portion 10L, preferably Preferably, it is formed to be larger than the line width away from the point to equalize the overall resistance values of the straight portion 10L and the extending portion 10T after bending. In general, to obtain this equivalent resistance value, the average of the line widths of the linearly extending portion 10L of the outer outer conducting line is made larger than the inner conducting line.

In this embodiment, the outer conducting line 10 extending to the length of the drawing has a pattern that increases as the width gets closer to the bending point Q. This pattern is beneficial for conducting lines extending from their front ends and bending in the same direction in turn for each predetermined interval. In other words, in the area where the conduction lines are arranged, there is enough empty space for drawing the curved conducting line, which is convenient for increasing the width of the other conducting line bent at a point farther from the bending point of the conducting line. Available.

Moreover, even if the average of the line widths of the straight line portions 10L of the outer conductive line is made larger than the width of the inner conductive line, the width of the conductive lines is the width of the line 10L extending the straight lines of the conductive line. In order to limit the difference between the averages of the line widths to small values, the empty space is increased as shown in FIG. 2 as a representative example.

Table 1 shows an example in the case of setting the width of the conducting lines 101-105 under predetermined conditions.

Conduction line (101) Conduction line (102) Conduction line (103) Conduction line (104) Conduction line (105) total Spacing P ₅ 0.23053 0.23053 0.23053 0.23053 0.07788 One Spacing P ₄ 0.29414 0.29414 0.29414 0.11758 One Spacing P ₃ 0.40206 0.40206 0.19588 One Spacing P ₂ 0.61803 0.38197 One Spacing P ₁ One One

One of the conditions in this case is that only the conducting lines 101-105 are the target lines and the conducting lines 101-105 are spaced from the ends of the outer conducting line 101, respectively, P ₁ , P ₂ , P ₃ , P. ₄ , P ₅ ). Another condition is that the spacings P ₁ , P ₂ , P ₃ , P ₄ , P ₅ are equal to each other, and the thickness and conductivity of the conducting line are also equal to each other. Furthermore, the values of the columns in Table 1, indicated for each conducting line, mean the width for each gap of the conducting line when the width of the wiring area (sum of all conducting line widths) is one. According to this example, when the intervals P ₁ , P ₅ are 1, the thickness of the conducting lines is 1, their resistivity is 1, and any conducting line will have a resistance of 12.84 value.

Even under the same conditions, there is a different combination of the width of the conduction line to the equalization of the resistance, but a relatively low resistance can be obtained by making the width of the conduction line other than the innermost conduction line equal for each gap, as shown in Table 1. It is predicted that there is.

3 shows a partial enlarged view of the modified conductive line 10 ′ to illustrate a more specific method of forming the conductive line 10 ′.

Also in FIG. 3, an enlarged form in the vicinity of the bending point of the conducting line is shown as a representative forming method.

In this embodiment, the conducting lines 101 ', 102', 103 ', ... have different shapes than those shown in Figure 2, while their inner edges all consist of straight lines, whereas they constitute an inner edge. Each straight line is not parallel to the straight line constituting the outer edge and forms a small angle with respect to the outer straight line. More specifically, each conducting line has a shape in which the width becomes thinner toward the front end portion. This pattern of conduction line allows the space between the conduction lines to be kept constant while having the advantage of promoting pattern formation.

In the form of a conducting line, the width of the portion 10L 'extending in a straight line gradually changes over the entire length of the portion 10L' extending in a straight line and the width in the range of the spacing P also varies. However, this form also shows that the line width varies in each of the portions extending in a straight line and the line widths at positions closer to the bending point Q, at least in each of the portions extending in a straight line at 101 ', 102', ... It meets the requirement that it is formed larger than the line width in a position further away from point Q to level the resistance. Thus, the basic effects and advantages described previously are similarly obtained.

Moreover, also in this form, it is possible to fully utilize the empty space as described above.

According to the above-described embodiment, it is possible not only to suppress the change in the resistance of the conducting line but also to use the pattern formation of the conducting line to easily provide the wiring resistance value of the line without having to separately provide a resistor set individually for the resistance value Making it the same is achieved.

It is then possible to equalize the delay, amplitude and / or other qualities of the signal transmitted over the conducting line by using the form of the bending wiring pattern according to the invention in the conducting line of the electronic device. In particular, this use is suitable for display panels. In particular, in the form of connecting the conductive lines from both sides of the display area 1d shown in FIG. 1, the conductive lines can be drawn substantially in line symmetry. Therefore, forming the conducting line is very convenient in that it hardly biases above the used area, and keeps the thickness of the liquid crystal layer at a uniform value in the LCD panel.

Although the above-described embodiment has been described with respect to the LCD panel, it should be noted that the present invention is not limited to this panel, and of course, the present invention is applicable to other types of display devices and various electronic devices. In addition, while the above-described embodiment is described with respect to the form in which the bending angle of the conducting line is perpendicular, the present invention is applicable to other forms (ie, the form in which the conducting line is bent at an angle excluding the right angle).

In addition, the above-described embodiment is described for the case where the display area is rectangular, but the present invention is not limited to this case. Moreover, even if the conducting line is connected to the gate electrode line as an example, the conducting line can be connected to the source electrode line. The present invention is applicable to display devices other than active matrix drive type display devices.

In the foregoing description, while several representative embodiments of the present invention have been described, those skilled in the art can modify the embodiments in various ways as necessary without departing from the scope of the claims.

The present invention is applicable to an electronic device having a bending wiring pattern.

Claims (7)

An electronic device having a substrate on which a plurality of conductive lines are formed, the conductive lines extending in a straight line at a predetermined front end and then in substantially the same direction for each predetermined interval to further extend to each predetermined connection object. The conductive line has a curved portion, the conductive line having a portion in which the varying line width extends in a straight line and the line width at a position closer to the bending point of the line is at least a resistance value of the portion extending in a straight line in the conductive line. The electronic device is made larger than the line width at a position farther from the bending point to equalize. The electronic device of claim 1 wherein the front end of the conducting line is connected to an input / output of a drive circuit or peripheral circuit of the electronic device. The electronic device of claim 1 wherein the connection object of the conducting lines is a plurality of lines extending substantially parallel to each other at a predetermined interval. The electronic device of claim 1 wherein the bending angle is substantially perpendicular. The display apparatus of claim 1, further comprising: a plurality of bus lines extending parallel to each other at predetermined intervals in a display area defined by at least one side and the other side facing each other, the bus lines extending from one side to the other side. And the straightly extending portion is arranged in an area outside a display area adjacent to at least one of the one side and the other side. The electronic device according to claim 5, wherein the bus line is a row electrode line or a gate electrode line, or a column electrode line or a source electrode line. 6. The display device according to claim 5, wherein the display area is also defined by third and fourth sides facing each other, and is formed substantially perpendicular to one side and the other side, and wherein the driving circuit or the peripheral circuit is formed of the third and fourth sides. And an external area of the display area adjacent to at least one of the four sides.

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