Touch device
By designing the induction electrode structure of interleaved branches in the operating area of the touch control device, the problem of low accuracy in position calculation of small and medium-sized pens in the prior art is solved, and higher accuracy in position judgment and line drawing stability are achieved.
Patent Information
- Application Number
- CN202510106316.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2025-01-14
- Filing Date
- 2025-01-23
- Publication Date
- 2025-05-30
AI Technical Summary
When calculating the position of the small pen tip stylus, the existing capacitive touch device has low accuracy and is easily disturbed by noise, resulting in abnormal phenomena such as broken lines or jitters in the drawing.
A touch control device is designed, and the operating area includes a plurality of induction electrodes extending in the Y direction, including a first induction electrode, a second induction electrode and a third induction electrode. The branch structures of these induction electrodes are intertwined to ensure that the contact distance between the stylus tip and the induction electrode is shortened, thereby increasing the induction capacity.
Through this design, the accuracy of the position calculation of the small nib stylus is improved, the influence of noise interference is reduced, and the continuity and stability of the line drawing is ensured.
Smart Images
Figure CN120066317A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a touch device, and more particularly to an electrode configuration of a touch device. Background Art
[0002] Existing capacitive touch devices have an operation area for users to perform input (i.e., touch operations, such as moving a cursor). The operation area includes a plurality of X electrodes and / or a plurality of Y electrodes. The plurality of X electrodes extend in the Y direction and are arranged in parallel in the X direction, where the X direction is perpendicular to the Y direction. The plurality of Y electrodes extend in the X direction and are arranged in the Y direction.
[0003] Figure 1 Show a traditional touch device. Figure 1 The touch device 10 includes an operation area 11. The operation area 11 includes a plurality of X electrodes 12, 13, and 14. The plurality of X electrodes 12, 13, and 14 extend in the Y direction and are arranged in parallel in the X direction. For the sake of simplicity, the description of the plurality of Y electrodes in the other direction is omitted here.
[0004] Figure 2 Show the induction amount when the stylus 15 with a larger tip diameter Φ1 touches the touch device 10. Figure 3 Show the induction amount when the stylus 16 with a smaller tip diameter Φ2 touches the touch device 10. As Figure 2 and Figure 3 shown, when the stylus 15 with a larger tip diameter Φ1 touches the touch device 10, a larger induction amount can be generated, while when the stylus 16 with a smaller tip diameter Φ2 touches the touch device 10, the generated induction amount is smaller, especially the induction amounts of the adjacent X electrodes 12 and 14. As shown in the figure, Figure 3 the distance D2 between the X electrodes 12 and 14 from the stylus 16 in Figure 2 is greater than the distance D1 between the X electrodes 12 and 14 from the stylus 15 in Figure 3 Therefore, the induction amounts obtained by sensing the X electrodes 12 and 14 in Figure 3 are very low, significantly less than the induction amounts obtained by sensing the X electrodes 12 and 14 in Figure 3 To calculate the position of the stylus, the induction amount of the electrode with the largest induction amount and the induction amounts of its adjacent electrodes are used. Since Figure 3 the induction amounts of the X electrodes 12 and 14 in
[0005] Figure 4 are inherently relatively low, once noise interference affects the sensing of the X electrodes 12 and 14, Figure 3 the accuracy of calculating the position of the stylus 16 in
[0005] Figure 4 will be greatly affected. For example, when the stylus 16 moves along the X direction on the touch device 10 to draw a line, the result displayed on the screen may show disconnection or other abnormal situations.Another existing touch device is shown. In Figure 4 In the touch device 20 of Figure 4 , each of the X electrodes 22, 23, and 24 has a main branch and a plurality of branches, where the main branch extends in the Y direction and the plurality of branches extend in the X direction, such that the branches of adjacent X electrodes cross each other.
[0006] Figure 4 The touch device 20 of Figure 4 has disadvantages, such as Figure 5 As shown. When the stylus 30 moves downward along the Y direction in the crossing area between two electrodes of the touch device 20 to draw a straight line, the result displayed on the display will be that the trace 32 as shown in Figure 6 has jitter. Summary of the Invention
[0007] One object of the present invention is to provide a touch device that can improve the accuracy of calculating the position of a small-tip stylus.
[0008] To achieve the above object, the present invention provides a touch device including a substrate. The substrate has an operation area, and the area outside the operation area is a non-operation area, and the substrate includes a first sensing electrode, a second sensing electrode, and a third sensing electrode. The first sensing electrode includes a first main branch, a first branch, and a second branch, where the first main branch, the first branch, and the second branch extend in a first direction, and the first branch and the second branch are respectively on opposite sides of the first main branch. The second sensing electrode includes a second main branch, a third branch, and a fourth branch, where the second main branch, the third branch, and the fourth branch extend in the first direction, and the third branch and the fourth branch are respectively on opposite sides of the second main branch. The third sensing electrode includes a third main branch, a fifth branch, and a sixth branch, where the third main branch, the fifth branch, and the sixth branch extend in the first direction, and the fifth branch and the sixth branch are respectively on opposite sides of the third main branch. The first sensing electrode, the second sensing electrode, and the third sensing electrode are arranged in a second direction, the first sensing electrode and the third sensing electrode are adjacent to the second sensing electrode, and the second direction is perpendicular to the first direction. The second branch is between the second main branch and the third branch, the third branch is between the first main branch and the second branch, the fourth branch is between the third main branch and the fifth branch, and the fifth branch is between the second main branch and the fourth branch. The ranges in which the first main branch, the second main branch, the third main branch, the first branch, the second branch, the third branch, the fourth branch, the fifth branch, and the sixth branch extend in the first direction include from a first edge of the operation area to a second edge of the operation area, and the first edge and the second edge are opposite to each other.
[0009] With the touch device of the present invention, it will be helpful to improve the accuracy of calculating the position of a small-tip stylus. Description of the Drawings
[0010] Figure 1 Displays a conventional touch device.
[0011] Figure 2 Displays the sensing amount when a stylus with a larger nib diameter touches the touch device.
[0012] Figure 3 Displays the sensing amount when a stylus with a smaller nib diameter touches the touch device.
[0013] Figure 4 Displays another existing touch device.
[0014] Figure 5 Displays a schematic diagram of the stylus moving on the Figure 4 touch device.
[0015] Figure 6 Displays the Figure 5 movement trajectory detected by the touch device in response to the movement of the stylus in.
[0016] Figure 7 Displays the first embodiment of the touch device of the present invention.
[0017] Figure 8 Displays a schematic diagram of the stylus moving on the Figure 7 touch device.
[0018] Figure 9 Displays the Figure 8 movement trajectory detected by the touch device in response to the movement of the stylus in.
[0019] Figure 10 Displays the second embodiment of the touch device of the present invention.
[0020] Figure 11 Displays the third embodiment of the touch device of the present invention.
[0021] Description of reference numerals: 10 - touch device; 11 - operation area; 12 - induction electrode; 13 - induction electrode; 14 - induction electrode; 20 - touch device; 21 - operation area; 22 - induction electrode; 23 - induction electrode; 24 - induction electrode; 30 - stylus; 31 - movement trajectory; 32 - movement trajectory; 33 - movement trajectory; 34 - movement trajectory; 40 - touch device; 41 - operation area; 411 - first edge; 412 - second edge; 42 - first induction electrode; 421 - first main branch; 422 - first branch; 423 - second branch; 43 - second induction electrode; 431 - second main branch; 432 - third branch; 433 - fourth branch; 44 - third induction electrode; 441 - third main branch; 442 - fifth branch; 443 - sixth branch; 45 - first conductor strip; 46 - second conductor strip; 47 - third conductor strip; 48 - fourth conductor strip; 49 - fifth conductor strip; 50 - sixth conductor strip; 60 - touch device; 61 - first conductor strip; 62 - second conductor strip; 63 - third conductor strip; 64 - fourth conductor strip; 65 - fifth conductor strip; 66 - sixth conductor strip; 70 - touch device; 71 - conductive via hole. Detailed implementation manners
[0022] Figure 7 Show the first embodiment of the touch device of the present invention. Figure 7The touch device 40 includes a substrate A, which can be transparent or opaque. The substrate A has an operation area 41, and the area outside the operation area 41 is a non-operation area. Within the operation area 41, the user can perform touch input. In the non-operation area, the user cannot perform touch input. In this embodiment, the operation area 41 has a rectangular shape, but the present invention is not limited thereto. The substrate A includes a first sensing electrode 42, a second sensing electrode 43, and a third sensing electrode 44 arranged along the X direction, wherein the first sensing electrode 42 and the third sensing electrode 44 are adjacent to the second sensing electrode 43. The first sensing electrode 42, the second sensing electrode 43, and the third sensing electrode 44 can be made of a transparent material (such as indium tin oxide (ITO)) or an opaque material (such as metal). The first sensing electrode 42 includes a first main branch 421, a first branch 422, and a second branch 423. The first main branch 421, the first branch 422, and the second branch 423 extend along the Y direction, and the first branch 422 and the second branch 423 are respectively on opposite sides of the first main branch 421. The first main branch 421 is electrically connected to the first branch 422 and the second branch 423. The second sensing electrode 43 includes a second main branch 431, a third branch 432, and a fourth branch 433. The second main branch 431, the third branch 432, and the fourth branch 433 extend along the Y direction, and the third branch 432 and the fourth branch 433 are respectively on opposite sides of the second main branch 431. The second main branch 431 is electrically connected to the third branch 432 and the fourth branch. The third sensing electrode 44 includes a third main branch 441, a fifth branch 442, and a sixth branch 443. The third main branch 441, the fifth branch 442, and the sixth branch 443 extend along the Y direction, and the fifth branch 442 and the sixth branch 443 are respectively on opposite sides of the third main branch 441. The third main branch 441 is electrically connected to the fifth branch 442 and the sixth branch 443. The second branch 423 is between the second main branch 431 and the third branch 432. The third branch 432 is between the first main branch 421 and the second branch 423. The fourth branch 433 is between the third main branch 441 and the fifth branch 442. The fifth branch 442 is between the second main branch 431 and the fourth branch 433. The ranges in which the first main branch 421, the second main branch 431, the third main branch 441, the first branch 422, the second branch 423, the third branch 432, the fourth branch 433, the fifth branch 442, and the sixth branch 443 extend along the Y direction at least include from the first edge 411 of the operation area 41 to the second edge 412 of the operation area 41, and the first edge 411 is opposite to the second edge 412. The Y direction is perpendicular to the X direction.
[0023] In Figure 7In this case, the substrate A further includes a first conductor strip 45, a second conductor strip 46, a third conductor strip 47, a fourth conductor strip 48, a fifth conductor strip 49, and a sixth conductor strip 50 located in the non-operating area of the touch device 40. The first conductor strip 45 is outside the first edge 411 of the operating area 41 for connecting the first main branch 421 and the first branch 422. The second conductor strip 46 is outside the second edge 412 of the operating area 41 for connecting the first main branch 421 and the second branch 423. The third conductor strip 47 is outside the first edge 411 for connecting the second main branch 431 and the third branch 432. A fourth conductor strip 48 is outside the second edge 412 for connecting the second main branch 431 and the fourth branch 433. The fifth conductor strip 49 is outside the first edge 411 for connecting the third main branch 441 and the fifth branch 442. The sixth conductor strip 50 is outside the second edge 412 for connecting the third main branch 441 and the sixth branch 443. The first conductor strip 45, the second conductor strip 46, the third conductor strip 47, the fourth conductor strip 48, the fifth conductor strip 49, and the sixth conductor strip 50 can be transparent materials (such as indium tin oxide (ITO)), or opaque materials (such as metals).
[0024] In an embodiment, the substrate A includes a first conductor layer, a second conductor layer, and an insulating layer located between the first conductor layer and the second conductor layer. The first conductor layer and the second conductor layer can be transparent materials (such as indium tin oxide (ITO)), or opaque materials (such as metals). The first conductor layer is above or below the second conductor layer. The first sensing electrode 42, the second sensing electrode 43, the third sensing electrode 44, the first conductor strip 45, the second conductor strip 46, the third conductor strip 47, the fourth conductor strip 48, the fifth conductor strip 49, and the sixth conductor strip 50 are located on the first conductor layer. The second conductor layer is for fabricating electrodes and conductor strips in another direction.
[0025] Through Figure 7 such an arrangement, the distances between the contact of the stylus tip and the adjacent sensing electrodes will all be shortened. For example, when the contact of the stylus 30 tip is at position P1, as shown in Figure 8 , the sensing amount of the second sensing electrode 43 will be the largest. Compared with the prior art, the tip of the stylus 30 is relatively close to the second branch 423 of the first sensing electrode 42 and the fifth branch 442 of the third sensing electrode 44. Therefore, the first sensing electrode 42 and the third sensing electrode 44 will generate a relatively large sensing amount, which helps to improve the accuracy of judging the position of the stylus. If the contact of the stylus 30 tip is at position P2, that is, between the second branch 423 and the third branch 432, as shown in Figure 8As shown, a relatively large induction amount is generated between the first electrode 42 and the second electrode 43. Compared with the prior art, the fifth branch 442 is closer to the position P2, so a relatively large induction amount is also generated in the third electrode. This helps to improve the accuracy of determining the position of the stylus.
[0026] Figure 8 A schematic diagram showing the movement of the stylus on Figure 7 the touch device. Figure 9 A diagram showing in response to Figure 8 the movement of the stylus 30 in Figure 8 and Figure 9 as shown, when the stylus 30 moves linearly downward along the Y direction from the positions P1 and P2, the detected movement trajectories 33 and 34 are almost straight lines without jitter. The effect of drawing a line is obviously better than that of the prior art.
[0027] Figure 7 In the embodiment of
[0028] Figure 10 Figure 10 Figure 7 Figure 10
[0029] Figure 10 the main branch and the branch of an electrode are connected via two conductor strips, but the present invention is not limited thereto. Different variations may exist in other embodiments.
[0029] In one embodiment, Figure 10The first conductor strip 61, the second conductor strip 62, and the third conductor strip 63 are in the non-operating area and on the same side of the operating area 41, for example, outside the first edge 411 or outside the second edge 412. The first conductor strip 61 and the third conductor strip 63 are located in the first conductor layer, the second conductor strip 62 is located in the second conductor layer, and there is an insulating layer between the first conductor layer and the second conductor layer. The insulating layer has a plurality of conductive vias. The second conductor strip 62 is electrically connected to the second induction electrode 43 through the plurality of conductive vias.
[0030] Figure 10 In the embodiment of, each induction electrode is connected to only one conductor strip at one end. Figure 11 Show the third embodiment of the present invention. Figure 11 The touch device 70 of Figure 10 The main difference from Figure 10 is that each induction electrode is electrically connected to a conductor strip at both ends. Compared with Figure 11 A fourth conductor strip 64, a fifth conductor strip 65, and a sixth conductor strip 66 are added to the substrate C of. The fourth conductor strip 64 is in the non-operating area and outside the second edge 412, and is connected to the first main branch 421, the first branch 422, and the second branch 423. The fifth conductor strip 65 is in the non-operating area and outside the first edge 411, and is connected to the second main branch 431, the third branch 432, and the fourth branch 433. The sixth conductor strip 66 is in the non-operating area and outside the second edge 412, and is connected to the third main branch 441, the fifth branch 442, and the sixth branch 443. For the stack structure of the substrate C, please refer to the description of the foregoing substrate B. The first induction electrode 42, the second induction electrode 43, the third induction electrode 44, the first conductor strip 61, the fourth conductor strip 64, the third conductor strip 63, and the sixth conductor strip 66 are located in the first conductor layer of the substrate C. The second conductor strip 62 and the fifth conductor layer 65 are located in the second conductor layer of the substrate C. There is an insulating layer between the first conductor layer and the second conductor layer. The insulating layer has a plurality of conductive vias 71. The second conductor strip 62 and the fifth conductor strip 65 are electrically connected to the second induction electrode 43 through the plurality of conductive vias 71. Figure 11 The length ratio of the main branch and the branch of Figure 8 is longer so that the electrodes in the first conductor layer can be electrically connected to the conductor strips in the second conductor layer in the non-operating area through the conductive vias, and short circuits between the electrodes can be avoided.
[0031] In one embodiment, the width of the first main branch 421 is equal to or greater than the width of the first branch 422 and / or the width of the second branch 423. For example, the width of the first main branch 421 is 3 times the width of the first branch 422 and the second branch 423.
[0032] In one embodiment, the width of the second main branch 431 is equal to or greater than the width of the third branch 432 and / or the width of the fourth branch 433. For example, the width of the second main branch 431 is three times the width of the third branch 432 and the fourth branch 433.
[0033] In one embodiment, the width of the third main branch 441 is equal to or greater than the width of the fifth branch 442 and / or the width of the sixth branch 443. For example, the width of the third main branch 441 is three times the width of the fifth branch 442 and the sixth branch 443.
[0034] Those of ordinary skill in the art of touch control should understand that Figure 7 、 Figure 10 and Figure 11 the conductive bars will be connected to the traces so as to transmit the signals of the sensing electrodes to a controller via the traces, and the controller is used to sense the electrodes in the X direction and the Y direction. The above embodiments are applicable to passive or active styluses. Figure 7 、 Figure 10 and Figure 11 The embodiments of are only described with three sensing electrodes along the X direction for the sake of simplicity, but the present invention is not limited thereto. In fact, there are more sensing electrodes along the X direction. In other embodiments, the substrate A further includes a plurality of electrodes and conductive bars arranged along the Y direction. The configuration and structure thereof can refer to Figure 7 Figure 10 and Figure 11 the embodiments of the sensing electrodes and conductive bars in, only the directions are different. In Figure 7 、 Figure 10 and Figure 11 the embodiments of, the main branch and the two branches of each sensing electrode are strip-shaped / rectangular, but the present invention is not limited thereto. In actual applications, a protective layer will be further covered above the substrate A to protect the sensing electrodes, conductive bars and traces, and the protective layer can be made of transparent or opaque materials.
[0035] The above are only the embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been provided above with embodiments, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field to which the present invention pertains, without departing from the scope of the technical solution of the present invention, may make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A touch device, characterized in that: include: A substrate has an operating area, and an area outside the operating area is a non-operating area. The substrate comprises: a first sensing electrode, comprising a first main branch, a first branch and a second branch, wherein the first main branch, the first branch and the second branch extend along a first direction, and the first branch and the second branch are respectively located on two opposite sides of the first main branch; a second sensing electrode, comprising a second main branch, a third branch and a fourth branch, wherein the second main branch, the third branch and the fourth branch extend along the first direction, and the third branch and the fourth branch are respectively located on two opposite sides of the second main branch; and a third sensing electrode, comprising a third main branch, a fifth branch and a sixth branch, wherein the third main branch, the fifth branch and the sixth branch extend along the first direction, and the fifth branch and the sixth branch are respectively on two opposite sides of the third main branch; The first sensing electrode, the second sensing electrode and the third sensing electrode are arranged along a second direction, the first sensing electrode and the third sensing electrode are adjacent to the second sensing electrode, and the second direction is perpendicular to the first direction; The second branch is between the second main branch and the third branch, the third branch is between the first main branch and the second branch, the fourth branch is between the third main branch and the fifth branch, and the fifth branch is between the second main branch and the fourth branch; Among them, the range extending along the first direction of the first main branch, the second main branch, the third main branch, the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch includes from the first edge of the operating area to the second edge of the operating area, and the first edge is opposite to the second edge.
2. The touch control device according to claim 1, wherein: The substrate also includes: a first conductor strip, located in the non-operating area and outside the first edge of the operating area, for connecting the first main branch and the first branch; a second conductor strip, located in the non-operating area and outside the second edge of the operating area, for connecting the first main branch and the second branch; a third conductor strip, located in the non-operating area and outside the first edge, for connecting the second main branch and the third branch; a fourth conductor strip, located in the non-operating area and outside the second edge, for connecting the second main branch and the fourth branch; a fifth conductor strip, located in the non-operating area and outside the first edge, for connecting the third main branch and the fifth branch; and A sixth conductor strip is located in the non-operating area and outside the second edge, and is used to connect the third main branch and the sixth branch.
3. The touch control device according to claim 1, wherein: The substrate also includes: A first conductor bar connecting the first main branch, the first branch and the second branch; a second conductor bar connecting the second main branch, the third branch and the fourth branch; and a third conductor bar connecting the third main branch, the fifth branch and the sixth branch; The first conductor strip and the third conductor strip are in the non-operating area and outside the first edge, and the second conductor strip is in the non-operating area and outside the second edge.
4. The touch control device according to claim 1, wherein: The substrate includes: a first conductor layer, comprising the first sensing electrode, the second sensing electrode, the third sensing electrode, a first conductor strip, and a third conductor strip, wherein the first conductor strip is in the non-operating region and outside the first edge of the operating region, and connects the first main branch, the first branch, and the second branch, and the third conductor strip is in the non-operating region and outside the first edge of the operating region, and connects the third main branch, the fifth branch, and the sixth branch; a second conductor layer, comprising a second conductor strip in the non-operating area and outside the first edge of the operating area; and An insulating layer includes a plurality of conductive through holes for connecting the second conductor strip and the second sensing electrode.
5. The touch control device according to claim 4, wherein: The first conductor layer further comprises: a fourth conductor strip, located in the non-operating area and outside the second edge of the operating area, and connecting the first main branch, the first branch, and the second branch; and a fifth conductor strip, located in the non-operating area and outside the second edge of the operating area, and connecting the third main branch, the fifth branch, and the sixth branch; and The second conductor layer further includes a sixth conductor strip in the non-operating area and outside the second edge of the operating area, wherein the sixth conductor strip is electrically connected to the second sensing electrode via the plurality of conductive vias.
6. The touch control device according to claim 1, wherein: The width of the first main branch is equal to or greater than the width of the first branch or the width of the second branch.
7. The touch control device according to claim 1, wherein: The width of the second main branch is equal to or greater than the width of the third branch or the width of the fourth branch.
8. The touch control device according to claim 1, wherein: The width of the third main branch is equal to or greater than the width of the fifth branch or the width of the sixth branch.