TWI229282B - Touch panel using low arc angle equal electrical potential field - Google Patents

Abstract

The present invention provides a touch panel input device using low arc angle equal electrical potential field. This device comprises: the first and the second electric conductive substrates, a rectangular electrode frame, a non-conductive thin film layer, and a control unit. This rectangular electrode frame is attached to the first electric conductive substrate whose four corners are individual electrodes connected by a wire to the control unit. The rectangular electrode frame is formed by a plurality of S-shaped silver wires crossed but not conducted to one another lined up in a row. Moreover, a plurality of non-continuous etching lines is provided on the electrical conductive thin film on the first electric conductive substrate in order to provide a uniform resistance distribution. A wire connects the second electric conductive substrate to the control unit to make the second substrate receive the pressing input signal that is applied.

Description

1229282 V. Description of the invention (1) [Field of the invention] The present invention relates to a touch input device, which includes an etching line with compensation in the electrode, especially a silver wire segment between two electric lines which are not connected to each other but are arranged alternately. Vk Λ4 · ΛΗ 2m * ti JA X Μ Touch input device with the same input result <+; [Background of the invention] Pressing, the resistive touch input device includes two layers of upper and lower principles, which are connected to a specific direction of electricity through a conductive substrate; Kι, another guide; the substrate plays the role of a sensing layer to drive ί $ The sharp-entry device /, the upper and middle substrates are generally flexible materials, and they are too large: they may cause damage. The conventional resistive input devices can be roughly divided into two types. The first type is that the electrode connected to the upper conductive substrate and the electrode connected to the lower conductive substrate must be switched by voltage, which is commonly known as a four-wire touch panel; The second type is that the electrode connected to the upper conductive substrate and the electrode connected to the lower conductive substrate do not need to switch voltages, which is commonly known as a five-wire touch panel. The coordinate sensing methods are described as follows: μ ^ Please refer to the first The figure shows the first type of resistive input device, which includes: a glass layer 10, an ITO (Indium Tin Oxide) conductive layer 11, an insulating layer 1, 2, a set of insulating points 1, and a pair of silver wire conducting electrodes in the χ direction (Χ + and χ a) 14. Another insulating layer 15. One of the y-direction silver wire conducting electrodes (γ + and γ a) 1 6. Another IT0 conductive layer 1 7, plastic film 18, and wiring ( Tai 1) 19, where the cable 19 is connected to the controller. When using, a certain voltage is alternately applied to the two pairs of electrodes 丨 4, 丄 6, and the voltages of the conductive layers 11, 17 are linearly distributed. When touched at any point on the surface of the two conductive layers,

Page 4 V. Description of the invention (2) The value of two conductive layers measured by one of the non-applied voltage pair electrodes is calculated by the controller, and it can be known that the touch pressure point is located in the direction coordinate. Disadvantages of this type of resistive input device '] Road ==; It is difficult to generate noise by 2 alternating currents and "fixing electricity-it is more difficult, and at the same time, the role-layer conduction di: please refer to the second figure, is the second Class resistive input device, b layer 2. m conductive film 21,-group of insulation points 22, electrode γ (^ direction and z axis direction electrode) 23, insulation layer 24, silver wire layer Π axis insulation layer 26, detection Silver wire layer 27, another conductive film, another adhesive film 29, and a cable 21, where the cable 2 is connected to the control: the working principle of the resistive input device is a conductive film 21: Zhou Lian: == 上 ΪΙΪΓ includes electrodes in the x-axis direction and the γ-axis direction with silver; the-end passes through the cable 21. Connected to the controller circuit substrate, the conductive side of the ^ film 28 of a conductive wire is also on the silver wire layer 27 The guide circuit is used for pressing detection. When the thin film is connected to 21 ,,, and on the table: when the point is clicked, the controller circuit adds a voltage of 1% to the x-axis direction of the electrode frame 23 and The Y two electrodes, and then the voltage at the time of the touch pressure is measured by the detection layer 27, and the X and γ coordinates of the touch pressure point are calculated by the circuit. The third figure illustrates the controller power in the second type of resistive input device.

=; The detection layer 27 is provided with a 1/0, B is a control device for detecting the wheel-in = shape L, and one of the four corners of the electrode frame 23 has a corner LB 1229282. 5. Description of the invention (3) ^ i: VCC, The diagonal corner RT is fixedly connected to the ground terminal, and the remaining two winters: * LT is connected to Vcc and the ground terminal. When LT is connected to Vcc, it is connected to the ground terminal, so ideally it can be on a conductive substrate. The voltage field (VoltaSe Field) with a linear distribution from left to right on the top of the 21st team, but not on ^, is because the X-axis side of this type of resistive input device: and = direction electrodes are connected to a single conductive substrate 21, in order to avoid short sun. The direction and γ-axis direction electrodes must be composed of discontinuous silver wires or higher S 2 anti-lines, so the voltage value between the middle point of LB and [7 is not equal to Vcc 'of the period Γ and is between The voltage at the intermediate point between RB and 1 ^ is not the ground terminal of ^, which causes a large error in the input of the x and γ coordinate values, especially ^ = sin, the input range of the inner edge of the electrode frame 'if it does not rely on the controller's correction: :: Although when a user draws a straight line, i often appears to be a recessed one. How to reduce this recessed phenomenon, that is, how to make the electric potential = low arc, or even zero arc, will be The key to accurate touch control Therefore, the present inventors have taken this into consideration, and the invention has been produced after continuous testing and research. [Summary of the Invention] The main purpose of the present invention is to use the complement of the etching line between the two electrodes to provide a uniform resistance distribution and improve the accuracy of the input result. The secondary objective of the present invention is that the electrode frame is composed of a plurality of silver wire segments of the type "s" which are not connected to each other but are arranged alternately to provide a uniform resistance distribution and improve the accuracy of input results. Bayi " ίίΐΐ 目:, The present invention proposes a touch input device with a low arc equipotential field. The touch input device includes: a first conductive substrate, a second conductive substrate, and 1229282. 5. Description of the invention (4) Electrode frame and insulation material. The non-connected but cross-connected film is provided with a distribution, the first measured pressing signal etches the first conductive base away from the first short, and the second kind of the first conductive ion is away from the second conductive base. The drawing is the second drawing, the third drawing is the drawing; the edge layer and the control corner are respectively electrode frames are arranged from each other to form a plurality of non-conductive substrates. The score line has four corners of two materials. In the case of a conductive substrate, four of the four electrical substrates of the etched substrate are described.] With the first type of electricity, the second type of electricity, and the second type of electrical appliances, the electrode frame is attached to the first conductive substrate as an electrode. And is connected to the plurality by a wire The “s” -shaped silver wire segments are “additional” to each other and the conductive etched lines on the first conductive substrate are provided to provide a uniform resistance connected by a wire to the controller as a sense distribution. The first type The situation is that the closer the line is, the longer the line length of the #engraved line is, the more four corners are. The longer the line length of the remaining line is, the more the length of the line is the same, but the closer to the corner, the denser the line of the last name is. The larger, the farther away the corner, the smaller the density of the etch line. Schematic diagram of a resistive input device; Schematic diagram of a resistive input device; Schematic diagram of a controller circuit in a resistive input device. The fourth diagram is a schematic diagram of the structure of the present invention; The remaining engraved lines and the sixth diagram of the embodiment are the etching lines and the [major component number] of the second embodiment of the present invention. 10 Glass layer. 11 ITO (Indium Tin Oxide) conductive layer.

1229282 V. Description of the invention (5) 12 Insulating layer 13 Insulating point 14 One pair of silver wire conducting electrodes in X direction (X + and X-) 15 Insulating layer 16 pair of silver wire conducting electrodes in Y direction (Y + and Y-) 17 ITO conductive layer 18 Plastic film 19 Cable 2 0 Glass layer 21 ITO conductive film 22 Insulation point 23 Electrode frame (including X-axis and Y-axis electrodes) 24 Insulation layer 25 Silver wire layer 26 Insulation layer 2 7 Detection silver Conductor layer 28 ITO conductive film 29 Plastic film 2 10 cable 30 substrate 31 conductive film 32 dot layer 3 3 electrode frame 34 insulation layer

1229282 V. Description of the invention (6) '3 5 Another substrate 36 Another conductive film 37 electrode contact 38 electrode contact 39 electrode contact 40 electrode contact 41 button engraving [Detailed description of the invention] It can be further understood that, in the following, preferred embodiments are described in detail with reference to the drawings and figures to describe the composition of the present invention and the effects achieved by it in detail. Please refer to the fourth figure, which is a schematic diagram of the resistive input device of the present invention, which includes a substrate 30, a conductive film 31, a mesh layer 32, an electrode frame 33, an insulating layer 34, another substrate 35, and another conductive film. 3 6, and last name engraved line 4 1. The electrodes 37, 38, 39, 40 are connected to the controller. The substrate 30 can be glass, plastic carbonate or film, and the conductive film 31 is indium oxide. Conductive materials such as tin ITO (Indium Tin Oxide) or copper foil are attached to the substrate 30 by means of sputtering or coating, etc. The dot layer 3 2 is printed or printed. Photoresist coating, exposure, display on conductive film 3 1 'The electrode frame 3 3 is printed on the periphery of conductive film 3 1' The insulating layer 3 4 is printed or printed on conductive film On the film 31, the other substrate 35 may be glass (Glass), plastic substrate (Plastic Carbonate) or plastic film (Film).

1229282 --------- V. Description of the invention (7) " " '----- Film 36 is made of indium tin oxide IT〇 (Indium Tin 〇xide) or copper foil, electrical material, system Sputtering or coating. ^ Make it adhere to the substrate 35, this other conductive film 36 is connected to the prosecutor, the scribe line 4 1 is engraved with wet touch or dry name The conductive film 31 has been etched away, or the conductive film has been removed in other ways. Please refer to the fifth figure, which is a schematic diagram of the etching line and the electrode frame 33 in the first embodiment of the present invention. The electrode frame 33 is composed of a plurality of "s" shaped silver wire segments which are not connected to each other but are arranged alternately. This design is designed to provide a uniform resistance distribution, and can roughly estimate the impedance value of each type of "S" shaped section as follows: ΤΟ d3ΪΤ + RSAg 7 2 /-2w — 2d 12 w 4w ^ 3d where u is the sheet resistance value of the conductive thin film, is the sheet resistance value of the silver line segment, 1 is the section length, w is the line width, and d is the line spacing. By adjusting the values of section length, line width, and line spacing, the optimal value that meets the controller's impedance design requirements can be designed. The preferred embodiment is w = (K5mm, d = (). 3mi 1 = 16mm. 〇 However At this time, the equipotential field on the conductive film 31 caused by the electrode frame 33 is still slightly lonely. 'How to reduce the arc of the equipotential field to a lower level? The closer the electrode is, the longer the length of the etched line segment is. The farther it is away from the electrode, that is, at the center, the shorter the length of the last engraved line segment. In this embodiment, by adjusting the length of the etched line, the shorter the middle, the shorter the length. The equipotential field on the conductive film 31 will be minimized, and even

1229282 V. Description of the invention (8) to zero radians. The reason is that the closer the electrode is, the lower the resistance value; the farther away from the electrode, the higher the resistance value, the more the resistance value is increased near the electrode through the adjustment of the length of the etching line, and the farther away from the electrode, the more Less resistance value, so regardless of the distance, the resistance value will be consistent, and the relative equipotential field will reach zero radians. For an example of another engraved line, please refer to the sixth figure, in which the line length of the etching line is the same, but the closer to the electrode, the greater the density of the etching line (that is, the greater the number of etching line units per unit length) The farther away from the & pole, that is, the more the center, the smaller the density of the etching line (that is, the fewer the number of etching lines per unit length), so that the effect of consistent resistance value can also be achieved to improve the accuracy of the input result . In summary, the touch input device with low arc equipotential field provided by the present invention not only achieves the expected practical effect but also a new design that has never been achieved. It has already met the requirements of the invention of the Patent Law, and is based on the law. Gwen applied for it. For this reason, I ask your reviewing committee to give a detailed review, and pray for your special attention as soon as possible. The present invention has been described in detail above, but only the preferred embodiments of the present invention described above, when it is not possible to limit the implementation of the present invention, "", that is, all equal changes and modifications made in accordance with the scope of the patent application of the present invention ^ Etc., should all still fall under the protection scope of the patent scope of the present invention.

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Claims (1)

1229282 VI. Application patent scope 1 * A touch input device with a low arc equipotential field, comprising: a cryoelectric substrate, a second conductive substrate, an electrode frame, and an insulating layer 15, which is attached to The first conductive substrate is characterized in that the f-electrode frame is formed by a plurality of rS "-like silver wire segments which are not connected to each other but are arranged in parallel with each other to provide a uniform resistance distribution. -2, as described in item 1 of the scope of the patent application, wherein the first lightning guide J material includes: a substrate, a conductive film, and a dot layer, 3, and the four corner systems Each electrode is an electrode and is connected to the controller by a wire. 3. The device as described in the first item of the patent application scope, wherein the second conductive J material includes:-a substrate,-a conductive film, the conductive thin controller . Yin Wang Bi 4 · A touch input device with a low arc isoelectric field, comprising: a first, an electric substrate, a second conductive substrate, an electrode frame, an insulating layer and a control benefit, the electrode frame is The first conductive substrate is attached to the first conductive substrate and is characterized in that: the first conductive substrate is provided with a plurality of discontinuous etchings for uniform resistance distribution. # 5. The device according to item 4 of the scope of patent application, wherein the first conductive substrate includes: a substrate, a conductive film, and a dot layer; in addition, four corners of the electrode frame are electrodes and A wire is connected to the controller, and the money engraving line is located on the conductive film. 2. The device according to item 4 of the scope of patent application, wherein the second conductive substrate comprises a substrate and a conductive film, and the conductive film is connected to the controller. Page 131229282 Patent range ~~~ '---- ^ ^ The device described in item 6 of the scope of patent application, wherein the way of generating the etching line is to etch the conductive film on the conductive film by wet etching Off. • The device according to item 6 of the scope of patent application, wherein the etching line is generated by dry etching the conductive film on the conductive film. 9. The device according to item 4 of the scope of patent application, wherein the closer to the four corners of the first conductive substrate, the longer the length of the line segment of the etching line, the farther away from the four corners of the first conductive substrate The shorter the line length of the etch line. I 0 · The device as described in item 4 of the scope of patent application, wherein the lengths of the etched lines are the same, but the closer to the four corners of the first conductive substrate, the greater the density of the etched lines, the farther away they are. The four corners of the first conductive substrate have a smaller density of the etching line. II. The device as described in item 4 of the scope of patent application, wherein the electrode frame is composed of a plurality of "S" shaped silver wire segments which are not connected to each other but are arranged in parallel with each other to form 0. Page 14