TWI236627B - Linear electrode for touch panel - Google Patents

Abstract

The present invention provides a linear electrode for touch panel, which is formed as a rectangle by two vertical segments and two horizontal segments, and has a terminal at four corners respectively to be connected to a control circuit; a platform extends from the center of each respective vertical segment and horizontal segment, a plurality of mutually opposite protrusions are protruded beyond each vertical segment and horizontal segment, and the protruded length of each protrusion is decremented from the platform toward the terminal at both ends to form an arc distribution; a cross-like protrusion rod is provided between two neighboring protrusions; a voltage is applied to each platform, each protrusion, and each protrusion rod to obtain a uniform potential distribution via a control circuit and form a continuous and linearly varied potential, so as to precisely determine the clicking position on the touch panel.

Description

1236627 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a linear electrode of a touch panel, and more particularly to a continuous and linearly changing potential difference that can be formed in the touch area. The output electrical signals can provide the touch panel linear electrodes accurately sensed by the computer. [Prior art] As shown in FIG. 4, it is a schematic diagram of a conventional five-wire touch panel, which is a control circuit 9 connected to the linear electrodes 8 1 of the touch panel 8 with four wires and applying a voltage to form a continuous and The potential difference changes linearly, and the stylus 7 is connected with a line. When the stylus 7 clicks on any position of the touch panel 8, the control circuit 9 can detect the X and Y axes of the stylus 7 on the selected position. The voltage value in the direction to determine the X and Y axis positions that define the 7-point position of the stylus. Please refer to FIG. 5, which is a schematic diagram of a linear electrode 8 1 used in a five-wire touch panel. In order for the stylus pen 7 to detect any potential difference at the selected position when the touch panel 8 is selected, The control panel 8 must have a continuous and linearly changing potential difference. Therefore, the linear electrode 8 1 is provided with a plurality of protruding electrodes 8 1 1 and 8 1 2 in the X and Y axis directions, respectively. As each electrode 8 1 1, The distance between 8 1 2 and the terminals 8 10A, 8 10B, 810C, and 810D in the corner is not equal, so they are 8 1 0 A, 8 1 OB, 8 10C, 8 1 〇D electrodes 8 1 1 and 8 1 2 need to increase their area in order to compensate for the voltage drop caused by the distance, so as to obtain a continuous and linearly changing potential difference to avoid uneven distribution of the potential difference. Hook causes poor linearity and leads to stylus

1236627 V. Description of the invention (2) 7 The shortcoming of inaccurate judgment of the selected position. However, by increasing the electrode area to compensate for the voltage drop caused by the distance difference, the uniform effect of the potential difference distribution obtained is not good, because it is far away from the terminals 8 1 0 A, 8 1 Ο B, 8 The electrodes 8 1 1 and 8 1 2 of 1 0 C and 8 1 0 D have indeed produced a voltage drop problem, and the required conduction distance has not been reduced. Therefore, when the position selected by the stylus 7 falls on the touch panel In the central area of 8, it is difficult to correctly read the selected position because it cannot detect the voltage of the same value, which makes it difficult to read the selected position correctly. Therefore, the design of the aforementioned linear electrode must include a control IC in the control circuit to correct the deviation. However, the addition of the control IC will increase the manufacturing cost, and there is still room for improvement in the accuracy of the point selection after calibration. How to manufacture a linear electrode that can more accurately read the selected position at a lower manufacturing cost has become the main subject of the present invention. [Summary of the Invention] The main purpose of the present invention is to solve the above-mentioned problems and provide a linear electrode of a touch panel capable of forming a continuous and linearly changing potential difference after applying a voltage to accurately determine a click position. To achieve the foregoing object, the linear electrode of the present invention is formed by two straight sections and two horizontal sections forming a rectangular shape, and a terminal is formed at each of four corners to connect with the control circuit, and the center of each straight section and the horizontal section is A part of the platform protrudes from each part, and each of the straight and transverse sections protrudes from a plurality of protruding ends. The protruding length of each protruding end decreases from each platform segment to the ends of the two ends to form an arc. Distributed, and there is a cross-shaped protruding rod between each two adjacent protruding ends, so that the control circuit will

1236627 V. Description of the invention (3) The terminal and each of the protruding rods apply a voltage to form a continuous and linearly changing potential difference. The above and other objects and advantages of the present invention can be easily understood from the detailed description and accompanying drawings of the selected embodiments below. Of course, the present invention allows some differences in the arrangement or arrangement of other parts, but the selected embodiment is described in detail in this specification and its structure is shown in the drawings. [Embodiment] Please refer to FIG. 1 to FIG. 3, which show the structure of the embodiment of the present invention, which is used for illustration only, and is not limited by this structure in patent application. As shown in FIG. 1, the touch panel of this embodiment is a spaced layer 1 2, a linear electrode 2, a first insulating layer 1 3, and a wire layer 1 on a conductive lower substrate 11 1 in this order. 4. A second insulating layer 15 and an upper substrate 16. As shown in FIG. 2 and FIG. 3, the linear electrode 2 has a rectangular shape and has two straight sections 2 1, 2 2 and two horizontal sections 2 3, 2 4, and the two straight sections 2 1, 2 2 and The four corners where the two horizontal sections 2 3 and 2 4 intersect each other form a terminal 201, 202, 203, and 204, respectively, through a wire layer 14 and a control circuit (not shown in the figure). Are connected, and the central sections of the straight sections 2 1, 2 2 and the transverse sections 2 3, 2 4 respectively protrude relatively from a platform section 2 1 1, 2 2 1, 2 3 1, 2 4 1, and each straight section 2 1 , 2 2 and horizontal sections 2 3, 2 4 are relatively protruding with a majority of protruding ends 2 1 2, 2 2 2, 2 3 2, 2 4 2 respectively, and each straight section 2 1, 2 2 and horizontal section 2 3, Each protruding end of 2 4 2 1 2, 2 2 2, 2 3 2, 2 4 2

1236627 V. Description of the invention (4) The protruding length is from each platform section 2 1 1, 2 2 1, 2 3 1, 2 4 1 to the terminals 2 0 1, 2 0 2, 2 03, 2 at both ends. 〇4 is decreasing, and two adjacent protruding ends 2 1 2, 2 2 2, 2 3 2, 2 4 2 respectively have a cross-shaped protruding rod 2 1 3, 2 2 3, 2 3 3, 2 4 3, and each protruding end 2 1 2, 2 2 2, 2 3 2, 2 4 2 and each protruding rod 2 1 3, 2 2 3, 2 3 3, 2 4 3 are respectively from each straight section 2 1 , 2 2 and each horizontal section 2 3, 2 4 project perpendicularly, and the cross-shaped protrusions 2 1 3, 2 2 3, 2 3 3, 2 4 3 are parallel to each straight section 2 1, 2 2 and horizontal section The sections 2 3 and 24 respectively form a compensation section A and B, so that each stage section 2 1 1, 2 2 1, 2 3 1, 241 and each protruding end 212, 222, 232, 242 are controlled by the control circuit. And each of the protruding rods 2 1 3, 2 2 3, 2 3 3, 2 4 3 applies a voltage to form a uniform potential difference distribution. The linear electrode 2 of the present invention is located at each straight section 2 1, 2 2 and each horizontal section 2 3, 2 4 away from the terminal 201, 2 0 2, 2 0 3, and 204, that is, each straight section. The central part of the segments 2 1, 2 2 and each horizontal segment 2 3, 2 4 is designed with a platform segment 2 1 1, 2 2 1, 2 3 1, 2 4 1, so that the two straight segments 2 1, 2 2 and The platform sections 2 1 1, 2 2 对应, 2 3 1, 2 4 1 corresponding to the two horizontal sections 2 3, 2 4 shorten the conduction distance, plus each platform section 2 1 1, 2 2 1, 2 3 1, 2 4 1 has a large horizontal width, so the design has both the function of increasing the electrode area and shortening the conduction distance, so that each platform section 2 1 1, 2 2 1, 2 3 1, 2 4 1 It can make up for the voltage drop loss caused by the terminals 201, 202, 202, and 204 that are far away from the terminals, and can make the potential of the central part of the touch panel

Page 8 1236627 V. Description of the invention (5) The uniformity of the difference distribution is improved to form a continuous and linearly changing potential difference, so as to accurately determine the click position of the touch panel. In addition, each of the protruding ends 212, 222, 232, and 242 is reduced by 1, 2, 3, and 2 degrees, 4 retreats 2, and 21 ends are evenly spaced from 2322 at 2 places, 4 because of 222 rods and protrusions 1 ο Complement, 2 and 2 can be divided into 32 points, 2 and 2 each have a difference of 2, can be 231 and B adjacent, 3 like 2 1 2 And, the same phase, I 2 ends, A and 22 counted 2 parities 3 rooms 2, set 1 sudden sudden air compensation 4 of the 2 2 2 cloth supplement 22 Ιο this end of the adjacent points, 4 12, the word difference 3 3 2 2, the state of the twelfth place 4 3, segment 1 ~ ^ The two-to-one supplementary power CXI CXI CX3 units are made of Ami, 3, and 2 cloths. The adjacent ends of 332 are different from each other, 232, each divided by a linear loss 3 4. 2 2 2 The arc is lowered by one of the upper 42, 2, and 2 degrees, plus 2, 332, which is the long end. , 2CN31, the two-shaped health 43322CM suddenly produced 232, rod 1. According to this, the design of the linear electrode of the present invention can indeed be controlled by the control circuit for each platform section 2 1 1, 2 2 1, 2 3 1, 2 4 1, each protruding end 2 12, 222, 232, 2 4 2 and each protrusion. The rods 213, 223, 2 3 3, 2 4 3 apply a voltage to form a uniform potential difference distribution, so that the output electrical signal can provide a precise sensing of the control circuit (or computer) to write, draw or point on the user's touch panel. When selecting a function, you can accurately determine the clicked position. The disclosure of the embodiments described above is used to illustrate the present invention, and is not intended to limit the present invention. Therefore, any change in numerical values or replacement of equivalent components should still be subject to

1236627 V. Description of the invention (6) belongs to the scope of the present invention. From the above detailed description, those skilled in the art can understand that the present invention can indeed achieve the aforementioned purpose, and it has indeed complied with the provisions of the Patent Law, and filed a patent application.

Page 10 1236627 Brief description of the diagram. Figure 1 is a schematic diagram of a touch panel structure using the linear electrode of the present invention. Figure 2 is a schematic plan view of the linear electrode structure of the present invention. Figure 3 is a partial enlarged view of the linear electrode of the sample invention. Figure 4 is a schematic diagram of a conventional five-wire touch panel. Figure 5 is a schematic diagram of a linear electrode of a conventional five-wire touch panel. [Illustration of drawing number] (conventional part) Touch panel 6 Linear electrode 6 1

Terminals 6 10A, 6 10B, 6 10C, 6 10D

Electrode 6 1 1, 6 1 2 Stylus 7 Touch panel 8 Linear electrode 8 1 Terminal 8 1 0 A, 8 1 〇 B, 8 1 0 C, 8 1 0 D Electrode 8 1 1, 8 1 2 Control Circuit 9 (part of the present invention) lower substrate 1 1 dot spacer layer 1 2 first insulating layer 1 3 wire layer 1 4 second insulating layer 1 5 upper substrate 1 6 linear electrode 2 terminals 2 01, 2 0 2 and 2 〇3, 204

Straight section 2 1, 2 2 Platform section 2 1 1, 2 2 1, 2 3 1, 2 4 1

Protruding end 212, 2 2 2, 232, 242 Protruding rod 213, 223, 233, 243 Cross section 2 3, 2 4 Compensation section A, B

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Claims (1)

1236627 VI. Scope of patent application 1 · A linear electrode of a touch panel. The linear electrode is a rectangle with two straight sections and two horizontal sections, and is formed at four corners where the two straight sections and two horizontal sections intersect. A terminal is connected to the control circuit, and a center section of each straight section and a horizontal section respectively protrudes from a platform section, and each straight section and a horizontal section respectively protrudes from a plurality of protruding ends, and each of the straight sections and horizontal sections protrudes relatively. The protruding length of each protruding end of the segment decreases from each platform segment to the terminals at both ends, and there is a cross-shaped protruding rod between each adjacent two protruding ends, so that each platform segment is controlled by the control circuit. 2. The potential difference distribution of the uniform sentence is formed by applying voltage to each protruding end and each of the protruding rods. 2 According to the linear electrode of the touch panel according to item 1 of the scope of patent application, each protruding end and each protruding rod are respectively The straight section and the transverse section protrude perpendicularly, and the cross-shaped protrusions parallel to the straight section and the transverse section respectively form a compensation portion. Page 12