Knob device applicable to a touch panel

Abstract

The present invention discloses a knob device applicable to a touch panel, which includes a knob cover and a rotation sensing element. The rotation sensing element includes a base and a plurality of sensing pads connected to the base. The rotation sensing element is disposed between the touch panel and the knob cover, and the base is connected to the knob cover. When a contact and rotation event of the knob device occurs, a position of the plurality of sensing pads controls a rotation sensing signal of the touch panel. A front projection of the knob cover on the touch panel is divided into a plurality of parts, and the plurality of parts are radially distributed from the center of the front projection. Each sensing pad is located in a part of the front projection and is connected to another sensing pad located in another part adjacent to the part, and the plurality of parts include the part and the another part.

Description

Technical Field

[0001] The present invention relates to the design of a user interface (UI) mechanism, and more particularly to a knob device applicable to a touch panel. Background Art

[0002] Knob devices are often used in general electronic devices, such as volume adjustment knobs on audio players, frequency adjustment knobs on radios, and air conditioner / air volume adjustment knobs on car consoles. Among them, many of these electronic devices are equipped with touch panels. Therefore, how to integrate the knob device with the touch panel to assist the user in operation has become an issue. In some traditional methods, there are holes in the glass of the touch panel, and the knob can be installed on the holes. However, drilling holes in the glass has disadvantages such as complex steps, high cost, and reduced glass strength. In some other traditional methods, a touch pad is installed in the knob, and then the knob is directly installed on the touch panel, and the function of the knob is realized through the touch effect of the touch pad on the touch panel. For example, when the user rotates the knob, the finger and the touch pad form a circuit with the touch panel, so that a touch signal is sent out by a unit of the touch panel contacted by the touch pad. According to the touch signals of different units of the touch panel, the rotation angle of the knob can be captured. However, this method may cause some problems. For example, when the knob is small, the resolution of the touch panel may be insufficient. For another example, when the touch pad of the knob is located between two touch panel units, it is difficult to determine the position of the touch pad. Therefore, a novel method and related architecture are needed to improve the rotation resolution of the knob on the touch panel and solve the problems without side effects or with less likely side effects. Summary of the Invention

[0003] An object of the present invention is to provide a knob device applicable to a touch panel, which can improve the rotation resolution to solve the above problems.

[0004] An embodiment of the present invention discloses a knob device applicable to a touch panel. The knob device includes a knob cover and a rotation sensing element. The rotation sensing element includes a base and a plurality of sensing pads connected to the base. The rotation sensing element is disposed between the touch panel and the knob cover, and the base is connected to the knob cover. When a contact and rotation event of the knob device occurs, a position of the plurality of sensing pads controls a rotation sensing signal of the touch panel. The orthographic projection of the knob cover on the touch panel is divided into a plurality of parts, and the plurality of parts are radially distributed from the center of the orthographic projection. Each sensing pad is located in a part of the orthographic projection and is connected to another sensing pad located in another part adjacent to the part, and the plurality of parts include the part and the another part.

[0005] An embodiment of the present invention discloses a knob device applicable to a touch panel. The knob device includes a knob cover and a rotation sensing element. The rotation sensing element includes a base and a plurality of sensing pads connected to the base. The rotation sensing element is disposed between the touch panel and the knob cover, and the base is connected to the knob cover. When a contact and rotation event of the knob device occurs, a position of the plurality of sensing pads controls a rotation sensing signal of the touch panel. The orthographic projection of the knob cover on the touch panel is divided into a plurality of parts, and the plurality of parts are radially distributed from the center of the orthographic projection. Each sensing pad is located in one part of the orthographic projection, and this part does not adjoin another part where another sensing pad is located, and the plurality of parts include this part and the other part.

[0006] Compared with the prior art, the knob device applicable to a touch panel according to the present invention can have more than one sensing pad. These sensing pads can be designed according to the orthographic projection of the knob cover, so that these sensing pads can cover more touch panel units, improve the resolution of the rotation angle of the knob device, and further enable the touch panel to sense a slight rotation action of the knob device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Schematic diagram of a knob device according to an embodiment of the present invention disposed on a touch panel;

[0008] Figure 2 Exploded view of the knob device according to the first embodiment of the present invention disposed on the touch panel;

[0009] Figure 3 Cross-sectional view of the knob device according to the first embodiment of the present invention disposed on the touch panel;

[0010] Figure 4 Top view of the knob device according to the first embodiment of the present invention disposed on the touch panel;

[0011] Figure 5 Schematic diagram of a sensing pad according to an embodiment of the present invention disposed according to a sector area of the orthographic projection of the knob cover;

[0012] Figure 6 Schematic diagram of two sensing pads according to the first embodiment of the present invention disposed according to two adjacent sector areas of the orthographic projection of the knob cover;

[0013] Figure 7 Schematic diagram of a plurality of sensing pads according to an embodiment of the present invention separately disposed according to the sector areas of the orthographic projection of the knob cover;

[0014] Figure 8Schematic diagram of two sensing pads according to two sector areas of the orthographic projection of the knob cover in an embodiment of the present invention, arranged separately;

[0015] Figure 9 Cross-sectional view of a knob device according to a second embodiment of the present invention disposed on the touch panel;

[0016] Figure 10 Top view of the knob device according to the second embodiment of the present invention disposed on the touch panel;

[0017] Figure 11 Schematic diagram of two sensing pads according to two adjacent sector areas of the orthographic projection of the knob cover in a second embodiment of the present invention;

[0018] Figure 12 Schematic diagram of two sensing pads according to two adjacent sector areas of the orthographic projection of the knob cover in an embodiment of the present invention;

[0019] Figure 13 Schematic diagram of two groups of sensing pads according to multiple sector areas of the orthographic projection of the knob cover in an embodiment of the present invention;

[0020] Figure 14 Schematic diagram of two groups of sensing pads according to multiple sector areas of the orthographic projection of the knob cover in an embodiment of the present invention, arranged separately.

[0021] Symbol description

[0022] 100, 200: Knob device

[0023] 110, 210: Knob cover

[0024] 111, 211: Portion

[0025] 112, 212: Gap portion

[0026] 130, 230: Rotation sensing element

[0027] 132, 232: Base

[0028] 134, 234: Sensing pad

[0029] 150, 250: Pressing sensing element

[0030] 300: Touch panel

[0031] 301, 301a, 301b, 301c, 301d,

[0032] 301e, 301f, 301g, 301h, 301i: Touch panel unit Detailed implementation manners

[0033] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. is a schematic diagram of a knob device 100 according to an embodiment of the present invention disposed on a touch panel 300. Figure 2 FIG. is an exploded view of the knob device 100 according to the first embodiment of the present invention disposed on the touch panel 300. As Figure 1 shown, the knob device 100 includes a knob cover 110 disposed on the touch panel 300. When the user operates the knob device 100 by touching the knob cover 110, the knob cover 110 and the sensing pad are electrically connected to each other to form a conductive path. This path allows the finger of the user touching the knob device 100 to be connected to the touch panel 300 through the conductive path, which is equivalent to allowing the user to indirectly control the touch panel 300. In other words, when the user touches the knob cover 110 of the knob device 100, the touch panel 300 generates a sensing signal in response to a loop formed by the touch panel 300, the knob device 100, and the user. Furthermore, when the user rotates or presses the knob cover 110 of the knob device 100, the touch panel 300 generates different sensing signals in response to the movement and position of the knob device 100. As Figure 2 shown, the knob device 100 includes a rotation sensing element 130 and a pressing sensing element 150, both of which are disposed between the touch panel 300 and the knob cover 110. The rotation sensing element 130 includes a plurality of sensing pads 134 and a base 132. In this embodiment, the rotation sensing element 130 has two adjacent sensing pads 134, but the present invention is not limited thereto. The base 132 is connected to the knob cover 110, and the plurality of sensing pads 134 can be disposed on the base 132 and / or the knob cover 110. In the first embodiment, for better understanding of the technical features of the present invention, the plurality of sensing pads 134 are shown as being disposed on the base 132. In addition, the touch panel 300 has a plurality of touch panel units 301 arranged in a matrix form. When the user touches the knob cover 110, the touch panel units 301 below the plurality of sensing pads 134 generate a sensing signal in response to the positions of the plurality of sensing pads 134. For example, based on the sensing signal output from the touch panel unit 301, the touch panel 300 generates a rotation sensing signal in response to the user touching and rotating the knob cover 110 of the knob device 100.

[0034] Please refer to Figure 3 , Figure 3 FIG. is a cross-sectional view of the knob device 100 according to the first embodiment of the present invention disposed on the touch panel 300. As Figure 3As shown, a plurality of sensing pads 134 are disposed above the touch panel 300 and abut or are close to the touch panel 300. In this embodiment, the plurality of sensing pads 134 abut the touch panel 300, but the present invention is not limited thereto. The pressing sensing element 150 can be connected to the knob cover 110 and / or the base 132. In this embodiment, for better understanding of the technical features of the present invention, the pressing sensing element 150 is shown as being connected to the knob cover 110. When the user touches and presses the knob cover 110 of the knob device 100, the pressing sensing element 150 abuts or is close to the touch panel 300, such that a pressing sensing signal is generated in the touch panel unit 301 below the pressing sensing element 150 in response to the pressing sensing element 150. For example, based on the pressing sensing signal output from the touch panel unit 301, the touch panel 300 generates a pressing sensing signal in response to the user touching and pressing the knob cover 110 of the knob device 100.

[0035] Furthermore, when the user touches and rotates the knob cover 110 of the knob device 100, one or more sensing signals are generated in the touch panel unit 301 below the plurality of sensing pads 134 in response to the positions of the plurality of sensing pads 134. It is worth mentioning that the knob cover 110 has a mechanism (such as a spring) that allows the knob cover 110 to be pressed down and bounce back when not being pressed. This mechanism is familiar to those skilled in the art, so this mechanism is not shown in the drawings and further description thereof is omitted herein for simplicity.

[0036] For example, please refer to Figure 4 , Figure 4 FIG. is a top view of the knob device 100 according to the first embodiment of the present invention disposed on the touch panel 300. Assume that when the user touches and presses the knob cover 110 of the knob device 100, two touch panel units 301a and 301b are located below the pressing sensing element 150. As Figure 4As shown, since the pressure sensing element 150 is located directly above the touch panel units 301a and 301b, the two touch panel units 301a and 301b generate two sensing signals. The touch panel 300 (especially the controller of the touch panel 300) can generate the pressure sensing signal by pre-writing a program, and generates the pressure sensing signal when receiving the two sensing signals generated by the two touch panel units (such as the touch panel units 301a and 301b in this embodiment). Similarly, when the user touches the knob cover 110 of the knob device 100, the touch panel unit 301c is located under the plurality of sensing pads 134, so that the touch panel unit 301c generates a sensing signal, which represents that the knob device 100 is touched. The touch panel 300 (especially the controller of the touch panel 300) can generate a rotation sensing signal by pre-writing a program to indicate that the knob device 100 is rotated. For example, when the knob device 100 first receives a sensing signal generated from one touch panel unit (such as the touch panel unit 301c in this embodiment), and then receives a sensing signal generated by another touch panel unit (such as the touch panel unit 301d in this embodiment), the rotation sensing signal is used to indicate that the knob device 100 is rotated. It should be noted that if the plurality of sensing pads 134 cover more touch panel units 301, even if the rotation angle of the knob device 100 is small, different touch panel units 301 can be touched, and thus a smaller rotation angle can be successfully captured. In other words, when the plurality of sensing pads 134 cover more touch panel units 301, the resolution of the rotation angle of the knob device 100 can be higher.

[0037] Please refer to Figure 5 and Figure 6 , Figure 5 is a schematic diagram showing that a sensing pad 134 according to an embodiment of the present invention is arranged according to a sector area of a front projection of the knob device 110. Figure 6 is a schematic diagram showing that two sensing pads 134 according to the first embodiment of the present invention are arranged according to two adjacent sector areas of the front projection of the knob device 110. As Figure 5As shown, the orthographic projection of the knob cover 110 on the touch panel 300 is divided into multiple parts 111, and these parts 111 are radially distributed from the center of the orthographic projection of the knob cover 110 (e.g., the center of the circle of the orthographic projection). The number of parts 111 depends on the resolution of the knob device 100 for the rotation angle. Each sensing pad 134 is a sector-shaped sensing pad that fills a sector area of multiple parts 111. For example, in this embodiment, the orthographic projection of the knob cover 110 on the touch panel 300 is equally divided into 28 parts 111, each part 111 is a sector area, and one of the multiple sensing pads 134 is a sector-shaped sensing pad and is formed according to one part 111. However, this setting is only for illustration and is not a limitation to the present invention. Alternatively, according to different design requirements, when dividing the parts of the orthographic projection of the knob cover 110 on the touch panel 300, it may also be unequal division.

[0038] As Figure 6 shown, in this embodiment, the rotation sensing element 130 includes more than one sensing pad (e.g., two sensing pads 134), and each sensing pad 134 is located on one part 111 and is connected to another sensing pad 134 located on another part 111 adjacent to this part 111. When two sensing pads 134 are arranged on two adjacent parts 111, more touch panel units 301 are covered by the sensing pad design with more sensing pads 134, thereby improving the resolution of the rotation angle of the knob device 100. For example, if the knob device 100 is slightly rotated, Figure 5 the touch panel units 301 covered by a single sensing pad 134 in Figure 6 may still be the same, that is, the sensing pad 134 is not rotated to a position above other touch panel units 301. Compared with the sensing pad design with only a single sensing pad 134,

[0039] the rotation sensing element in Figure 7 , Figure 7 is a schematic diagram of multiple sensing pads 134 arranged separately according to the sector area of the orthographic projection of the knob device 110. As Figure 7As shown, each sensing pad 134 is located within a portion 111 and is not connected to another sensing pad 134. The gap portion 112 of the plurality of portions 111 in the orthographic projection of the knob cover 110 is located between any two of the plurality of sensing pads 134. In other words, Figure 7 the rotational sensing element in Figure 8 has four spatially separated sensing pads 134. Three gap portions 112 are located between the four sensing pads 134 to separate the sensing pads 134. The separated plurality of sensing pads 134 can cover more touch panel units 301, thereby improving the resolution of the rotation angle of the knob device 100. Please refer to Figure 8 which is a schematic diagram of two sensing pads 134 arranged separately according to two sector regions in the orthographic projection of the knob cover 110 according to an embodiment of the present invention. As Figure 8 shown, in some embodiments, one gap portion 112 is connected to another gap portion 112. For example, Figure 8 the rotational sensing element in

[0040] has two spatially separated sensing pads 134. Three gap portions 112 are connected to each other and are located between the two sensing pads 134 to separate the two sensing pads 134. The separated sensing pads 134 can cover more touch panel units 301, such that the touch panel 300 can obtain a rotational sensing signal from a slightly rotated movement.

[0041] According to the above settings, each sensing pad is formed according to a sector region in the orthographic projection of the knob cover and covers as many touch panel units as possible. Furthermore, adjacent sensing pads and / or separated sensing pads can also be used to increase the number of touch panel units under the sensing pads. When a smaller rotation angle can cause multiple sensing pads to cover different touch panel units, the resolution of the rotation angle of the knob device 100 can be improved. Figure 9 Figure 9 Please refer to Figure 9 Figure 9 which is a cross-sectional view of a knob device 200 disposed on a touch panel 300 according to a second embodiment of the present invention. Similar to the knob device 100 of the first embodiment of the present invention, the knob device 200 of the second embodiment of the present invention includes a knob cover 210, a rotational sensing element 230, and a pressing sensing element 250. The rotational sensing element 230 and the pressing sensing element 250 are both disposed between the touch panel 300 and the knob cover 210, as Figure 9As shown. The rotation sensing element 230 includes a plurality of sensing pads 234 and a base 232. The difference between the second embodiment of the present invention and the first embodiment is that the plurality of sensing pads 234 are disposed on the knob cover 210, and the pressing sensing element 250 is connected to the base 232. When the user rotates the knob device 200, the plurality of sensing pads 234 and the pressing sensing element 250 rotate simultaneously with the knob device 200. Similarly, when the user touches and presses the knob cover 210 of the knob device 200 of the second embodiment, the pressing sensing element 250 abuts or approaches the touch panel 300, so that the touch panel unit 301 under the pressing sensing element 250 generates a pressing sensing signal in response to the pressing sensing element 250. For example, based on the sensing signal output from the touch panel unit 301, the touch panel 300 generates a pressing sensing signal in response to the user touching and pressing the knob cover 210 of the knob device 200. Furthermore, when the user touches and rotates the knob cover 210 of the knob device 200 of the second embodiment, the touch panel unit 301 under the plurality of sensing pads 234 generates one or more sensing signals in response to the positions of the plurality of sensing pads 234. For example, based on the sensing signal output from the touch panel unit 301, the touch panel 300 generates a rotation sensing signal in response to the user touching and rotating the knob cover 210 of the knob device 200.

[0042] Please refer to Figure 10 , Figure 10 FIG. is a top view of the knob device 200 according to the second embodiment of the present invention disposed on the touch panel 300. As Figure 10As shown, a plurality of sensing pads 234 are disposed on the knob cover 210 and lack the area around the center of the orthographic projection of the knob cover 210 (i.e., the plurality of sensing pads 234 are not connected to the orthographic projection center). Assume that when the user touches and presses the knob cover 210 of the knob device 200, three touch panel units 301e, 301f, and 301g are located below the pressure sensing element 250, such that the three touch panel units 301e, 301f, and 301g generate three sensing signals. The touch panel 300 (especially the controller of the touch panel 300) can be pre-programmed to generate a pressure sensing signal, and the pressure sensing signal is generated when receiving the three sensing signals generated by three adjacent touch panel units. Similarly, when the user touches the knob cover 210 of the knob device 200, the touch panel unit 301h is located below the plurality of sensing pads 234, such that the touch panel unit 301h generates a sensing signal, which represents that the knob device 200 is touched. If the user rotates the knob cover 210 of the knob device 200 clockwise, the plurality of sensing pads 234 move to a position above the touch panel unit 301i, such that the touch panel unit 301i is located below the plurality of sensing pads 234 and generates a sensing signal. The touch panel 300 (especially the controller of the touch panel 300) can be pre-programmed to generate a rotation sensing signal to indicate that the knob device 200 is rotated. For example, when the knob device 200 first receives a sensing signal generated by a touch panel unit (such as the touch panel unit 301h in this embodiment), and then receives a sensing signal generated by another touch panel unit (such as the touch panel unit 301i in this embodiment), the rotation sensing signal is used to indicate that the knob device 200 is rotated. It should be noted that the three touch panel units 301e, 301f, and 301g may be covered by the plurality of sensing pads 234. Therefore, it can be designed such that the area of the pressure sensing element 250 has a large difference from the area of the plurality of sensing pads 234 to reduce the misjudgment between pressing and rotating. In addition, when the user rotates the knob cover 210 of the knob device 200 clockwise, the portion of the sensing pad 234 farthest from the center of the orthographic projection of the knob cover 210 will first cover the touch panel unit 301i. Therefore, the area of the sensing pad 234 away from the center of the orthographic projection of the knob cover 210 can effectively improve the resolution of the rotation angle of the knob device 200.

[0043] In this embodiment, a plurality of sensing pads 234 are disposed on the knob cover 110. The sensing pad design using the plurality of sensing pads 234 can have some variations to meet different requirements. Please refer to Figure 11 , Figure 11Schematic diagram showing that two sensing pads 234 according to a second embodiment of the present invention are arranged according to two adjacent sector areas of the orthographic projection of the knob cover 210. Similarly, the orthographic projection of the knob cover 210 on the touch panel 300 is divided into a plurality of portions 211, and these portions 211 are radially distributed from the center of the orthographic projection of the knob cover 210 (e.g., the center of the orthographic projection, i.e., the center of the circle). The number of the plurality of portions 211 depends on the resolution of the rotation angle of the knob device 200. Since a plurality of sensing pads 234 are provided on the knob cover 210, the portion of the sensing pads 234 away from the center of the orthographic projection of the knob cover 210 can be increased. In some embodiments, the plurality of sensing pads 234 may extend from the knob cover 210. As Figure 11 shown, Figure 11 a set of sensing pads in [the figure] consists of two sensing pads 234, and these sensing pads 234 are located in a region away from the center of the orthographic projection in a sector area of the orthographic projection of the knob cover 210, and further extend outside the orthographic projection of the knob cover 210 so as to cover more touch panel units 301. In other words, the plurality of sensing pads 234 have a first portion and a second portion connected to the first portion, wherein the first portion is located in one of the plurality of portions, and the second portion is located outside the orthographic projection of the knob cover 210. It should be noted that the portion where the sensing pad 234 extends from the knob cover 210 (e.g., the second portion) may be seen by the user and may block a part of the screen.

[0044] In some embodiments, each sensing pad 234 is formed on a region in a sector away from the center of the orthographic projection of the knob cover 210. Please refer to Figure 12 , Figure 12 Schematic diagram showing that two sensing pads 234 according to an embodiment of the present invention are arranged according to two adjacent sector areas of the orthographic projection of the knob cover 210. For example, as Figure 12 shown, Figure 12 a set of sensing pads 234 in [the figure] is a sector, which is formed according to a region away from the center in three portions 211, and the area of the sensing pads 234 away from the center is enlarged, while the area thereof close to the center is reduced. And there is another set of sensing pads located in the other three portions 111 and connected to a set of sensing pads in the adjacent three portions 211. In this way, the area of the sensing pads 234 away from the center is increased to cover more touch panel units 301, while the area of the sensing pads 234 around the center is reduced, so that there is a sufficient difference in area between the rotation sensing element 230 and the pressing sensing element 250 to prevent misjudgment between the rotation action detected by the rotation sensing element 230 and the pressing detected by the pressing sensing element 250.

[0045] In some embodiments, a gap portion 212 of the orthographic projection of the knob cap 210 is formed between two sets of sensing pads 234 to separate one set of sensing pads 234 from the other set of sensing pads 234. Please refer to Figure 13 , Figure 13 FIG. is a schematic diagram showing two sets of sensing pads 234 according to an embodiment of the present invention arranged according to a plurality of fan-shaped regions of the orthographic projection of the knob cap 210. As Figure 13 shown, Figure 13 one set of sensing pads 234 in FIG. is composed of two sensing pads 234 located in a region away from the center of the orthographic projection in the fan-shaped region of the orthographic projection of the knob cap 210, and a gap portion 112 in a plurality of portions 111 of the orthographic projection of the knob cap 110 is located between the two sets of sensing pads 234. In other words, a gap portion 212 is located between the two sets of sensing pads 234 to separate the plurality of sensing pads 234. The separated sensing pads 234 can cover more touch panel units 301, thereby improving the resolution of the rotation angle of the knob device. Please refer to Figure 14 , Figure 14 FIG. is a schematic diagram showing two sets of sensing pads 234 arranged separately according to a plurality of fan-shaped regions of the orthographic projection of the knob cap 211 according to an embodiment of the present invention. As Figure 14 shown, in some embodiments, one gap portion 212 is connected to another gap portion 212. For example, Figure 14 one set of sensing pads 234 in FIG. is formed by a fan shape according to a region away from the center in three portions 211, and the area of these sensing pads 234 away from the center is enlarged, while the area near the center is reduced. The two gap portions 212 are connected to each other and located between the two sets of sensing pads 234 to separate these sensing pads 234. The separated sensing pads 234 can cover more touch panel units 301, so that the touch panel 300 can obtain a rotation sensing signal from a slight rotation action.

[0046] The above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims

1. A knob device applicable to a touch panel, comprising: A knob cover; and A rotation sensing element, comprising a base and a plurality of sensing pads connected to the base, wherein the rotation sensing element is disposed between the touch panel and the knob cover, and the base is connected to the knob cover; Wherein when a contact and rotation event of the knob device occurs, the positions of the plurality of sensing pads control the rotation sensing signal of the touch panel; Wherein the orthographic projection of the knob cover on the touch panel is divided into a plurality of parts, and the plurality of parts are radially distributed from the center of the orthographic projection, and each sensing pad is located in a part of the orthographic projection and is connected to another adjacent sensing pad.

2. The knob device according to claim 1, wherein each of the plurality of parts of the orthographic projection of the knob cover is a sector area.

3. The knob device according to claim 2, wherein each sensing pad is a sector, which completely fills a sector area among the plurality of parts.

4. The knob device according to claim 1, wherein each sensing pad comprises a first part and a second part connected to the first part, the first part is located within the orthographic projection, and the second part is located outside the orthographic projection of the knob cover.

5. The knob device according to claim 1, further comprising: A pressing sensing element, disposed between the knob cover and the touch panel and connected to the knob cover; Wherein the pressing sensing element is located above the touch panel, and when a contact and pressing event of the knob device occurs, the pressing sensing element abuts against or approaches the touch panel, and controls the pressing sensing signal of the touch panel.

6. The knob device according to claim 5, wherein the orthographic projection of the pressing sensing element on the touch panel is larger than the orthographic projection of one of the plurality of sensing pads on the touch panel.

7. The knob device according to claim 5, wherein the pressing sensing element and the plurality of sensing pads do not overlap with each other.

8. A knob device applicable to a touch panel, comprising: A knob cover; and A rotation sensing element, comprising a base and a plurality of sensing pads connected to the base, wherein the rotation sensing element is disposed between the touch panel and the knob cover, and the base is connected to the knob cover; Wherein when a contact and rotation event of the knob device occurs, the positions of the plurality of sensing pads control the rotation sensing signal of the touch panel; Wherein the orthographic projection of the knob cover on the touch panel is divided into a plurality of parts, and the plurality of parts are radially distributed from the center of the orthographic projection, and each sensing pad is located in a part of the orthographic projection and is not adjacent to another sensing pad.

9. The knob device according to claim 8, wherein each of the plurality of parts of the orthographic projection of the knob cover is a sector area.

10. The knob device according to claim 9, wherein each sensing pad is a sector, which completely fills a sector area among the plurality of parts.

11. The knob device according to claim 8, wherein each sensing pad comprises a first part and a second part connected to the first part, the first part is located within the orthographic projection, and the second part is located outside the orthographic projection of the knob cover.

12. The knob device according to claim 8, further comprising: a pressing sensing element disposed between the knob cover and the touch panel and connected to the knob cover; wherein the pressing sensing element is located above the touch panel, and when a contact and pressing event of the knob device occurs, the pressing sensing element abuts or approaches the touch panel and controls a pressing sensing signal of the touch panel.

13. The knob device according to claim 12, wherein a positive projection of the pressing sensing element on the touch panel is larger than a positive projection of one of the plurality of sensing pads on the touch panel.

14. The knob device according to claim 12, wherein the pressing sensing element and the plurality of sensing pads do not overlap each other.

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