CN111221427A

CN111221427A - Working method of knob device

Info

Publication number: CN111221427A
Application number: CN201811402579.9A
Authority: CN
Inventors: 张维甫; 李青龙; 陈鸿祥
Original assignee: Chunghwa Picture Tubes Ltd
Current assignee: Chunghwa Picture Tubes Ltd
Priority date: 2018-11-23
Filing date: 2018-11-23
Publication date: 2020-06-02

Abstract

The invention discloses a working method of a knob device, which comprises the steps of judging a first position of a conductive contact of a knob, wherein the first position is positioned on one of a plurality of touch point areas on the surface of a touch panel, and the touch point areas are separated from each other and arranged along an arc; after the knob rotates for an angle, judging a second position of a conductive contact of the knob, wherein the second position is positioned on one of the touch point areas; and when the first position and the second position are respectively positioned on two of the touch point areas, the touch panel judges whether the knob rotates clockwise or anticlockwise according to the two touch point areas. The working method of the knob device can avoid the condition that the knob is judged to be in the shaking state of clockwise rotation and anticlockwise rotation repeatedly by mistake, and improve the operation fluency of the application program of the touch panel.

Description

Working method of knob device

Technical Field

The present invention relates to a method for operating a knob device, and more particularly, to a method for operating a knob device for a touch panel.

Background

When the conventional knob device is applied to a touch panel, the contact coordinates of the conductive contacts are determined according to capacitance changes generated on the touch panel. And then the knob is known to rotate clockwise or anticlockwise through the position and angle change of the conductive contact.

However, since the bottom of the conductive contact has a certain area, the position coordinates of the conductive contact determined by the capacitance variation area of the touch panel will form irregular jitter in the capacitance dissipation process. Therefore, when the knob is operated, the system misjudges the rotation angle or position, and further judges whether the knob repeatedly rotates clockwise or counterclockwise, which results in poor smoothness of operation of the application program.

Disclosure of Invention

The present invention is directed to a method for operating a knob device, which can prevent a knob from being erroneously determined to be in a shaking state of being repeatedly rotated clockwise and counterclockwise, and improve the smoothness of operation of an application program of a touch panel.

In some embodiments of the present invention, a method for operating a knob device includes determining a first position of a conductive contact of a knob, wherein the first position is located on one of a plurality of touch point regions on a surface of a touch panel, the touch point regions being separated from each other and arranged along an arc; after the knob rotates for an angle, judging a second position of a conductive contact of the knob, wherein the second position is positioned on one of the touch point areas; and when the first position and the second position are respectively positioned on two of the touch point areas, the touch panel judges whether the knob rotates clockwise or anticlockwise according to the two touch point areas.

In some embodiments of the present invention, before determining the first position of the conductive contact of the knob, the operating method further includes defining a radius of the arc as a distance between a center of the conductive contact and an orthographic projection of the center of the knob on the surface of the touch panel.

In some embodiments of the present invention, before determining the first position of the conductive contact of the knob, the operating method further includes adjusting the size of the touch point area, so that when the conductive contact is located between two adjacent touch point areas, the two adjacent touch point areas and the conductive contact are not overlapped.

In some embodiments of the present invention, determining the first position of the conductive contact of the knob further includes determining whether a range of capacitance variation generated by the touch panel overlaps a portion of one of the touch point areas, where the portion is located in the touch point area below the first position.

In some embodiments of the present invention, before determining the second position of the conductive contact of the knob, the operating method further includes presetting one of the second position and the first position in the touch point area.

In some embodiments of the present invention, determining the second position of the conductive contact of the knob further includes determining whether a range of capacitance variation generated by the touch panel overlaps a portion of one of the touch point areas, wherein the portion is located in the touch point area below the second position.

In some embodiments of the present invention, before determining the first position of the conductive contact of the knob, the operating method further includes determining a number n of touch point areas according to the size of the conductive contact of the knob, and sequentially defining a first touch point area, a second touch point area, and … n touch point area on the arc in a clockwise direction or a counterclockwise direction, wherein indexes corresponding to the first touch point area, the second touch point area, and the … n touch point area are sequentially 1, 2, and … n.

In some embodiments of the present invention, the first touch point region to the nth touch point region are arranged in a clockwise direction, and after determining the second position of the conductive contact of the knob, the operating method further includes determining that the knob is rotated in the clockwise direction when the first position is located on the nth touch point region and the second position is located on the first touch point region, or that the knob is rotated in the counterclockwise direction when the first position is located on the first touch point region and the second position is located on the nth touch point region.

In some embodiments of the present invention, the first touch point area to the nth touch point area are arranged in a clockwise direction, and after determining the second position of the conductive contact of the knob, the operating method further includes determining that the knob is rotated in the clockwise direction when the index of the touch point area corresponding to the first position is smaller than the index of the touch point area corresponding to the second position.

In some embodiments of the present invention, after the touch panel determines that the knob is rotated clockwise or counterclockwise according to the two-touch-point area, the operating method further includes defining the second position as another first position.

In the above embodiments of the present invention, the positions of the conductive contacts are determined according to the touch point regions separated from each other, and when the conductive contacts are located between two adjacent touch point regions, the conductive contacts do not overlap the touch point regions located on both sides. Therefore, the knob can be prevented from being judged to be in the shaking state of clockwise rotation and anticlockwise rotation repeatedly by mistake, and the operation fluency of the application program of the touch panel is improved.

Drawings

Fig. 1 is a side view of a touch panel with a knob device according to an embodiment of the invention.

Fig. 2 is a perspective view of the knob and the conductive contact of fig. 1 viewed from below.

Fig. 3A and 3B are flowcharts illustrating stages of a method for operating a knob device according to an embodiment of the invention.

Fig. 4 is a top view of a touch point area and a knob according to an embodiment of the invention.

Fig. 5 to 9 are top views of conductive contacts sequentially rotated to different positions on the touch panel according to an embodiment of the invention.

Fig. 10 to 11 are top views illustrating conductive contacts rotated to different positions on a touch panel according to another embodiment of the invention.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner. And the thickness of layers and regions in the drawings may be exaggerated for clarity, and the same reference numerals denote the same elements in the description of the drawings.

Fig. 1 is a side view of a touch panel 100 with a knob device 110 according to an embodiment of the invention. Fig. 2 is a perspective view of the knob 112 and the conductive contact 116 in fig. 1 from below. Referring to fig. 1 and 2, the knob device 110 has a knob 112, a base 114 and a conductive contact 116. The housing of the knob 112 is made of a mixture of plastic and conductive material, and the conductive material in the knob 112 is connected to the conductive contacts 116. The conductive contacts 116 are in contact with the surface 102 of the touch panel 100, and the knob 112 is rotated relative to the touch panel 100 through the base 114.

Referring to fig. 1 and 2, the knob 112 has a center 1122 and the conductive contact 116 has a center 1162. During operation of the knob device 110, the knob 112 rotates about an axis a passing through the center 1122, and the conductive contact 116 rotates about the axis a along the arc C. In the present embodiment, a distance between a forward projection 1162 'of the center 1162 of the conductive contact 116 on the surface 102 of the touch panel 100 and a forward projection 1122' of the center 1122 of the knob 112 on the surface 102 of the touch panel 100 is a radius R of the circular arc C.

When the user touches the knob 112, the capacitance in the touch panel 100 is changed by the knob 112 and the conductive contact 116, so that the position of the conductive contact 116 can be sensed by the capacitance change range, and the operation state of the knob 112 can be further determined. In the present embodiment, the size and shape of the conductive contact 116 are only examples, and are not intended to limit the present invention. Specifically, the conductive contact 116 may have any size and shape as long as the touch panel 100 can determine the position of the conductive contact 116 through the range of capacitance variation.

Fig. 3A and 3B are flowcharts illustrating various stages of a working method of the knob device 110 according to an embodiment of the invention. Fig. 4 is a top view of the touch point area 120 and the knob 112 according to an embodiment of the invention. In order to make the touch point area 120 and the conductive contact 116 of fig. 4 to 11 clearer, the touch point area 120 and the conductive contact 116 are actually covered by the knob 112, which is shown by a solid line.

Referring to fig. 3A and 4, in step S1, the touch point area 120 is defined according to the position, size and shape of the conductive contact 116 of the knob 112. It should be understood that the touch point area 120 shown in the figure is only a virtual area and is not an actual structure on the touch panel 100. Specifically, the touch point area 120 is used to indicate that the capacitance change generated by the capacitance under the area (i.e. inside the touch panel 100) during the knob operation will be applied to the calculation and determination of the position of the conductive contact. However, the conditions required to be satisfied for defining the touch point area 120 will be described in detail in the following paragraphs with reference to fig. 4.

The surface 102 of the touch panel 100 has a sensing area 104 for sensing the conductive contact 116, and the sensing area 104 is substantially equal to an orthographic projection of the knob 112 on the surface 102 of the touch panel 100. The number n of touch point areas 120 is determined according to the size of the conductive contacts 116 of the knob 112. Specifically, the sensing area 104 is divided into n blocks 106, and the touch point area 120 is located in each block 106 of the sensing area 104. As shown in fig. 4, the block 106 is a sector area divided by a dashed line passing through the forward projection 1122' of the center 1122. In addition, the area of each block needs to at least cover the area of the conductive contact 116. That is, when the conductive contact 116 is located in any one of the touch point regions 120, the orthographic projection of the conductive contact 116 can be completely located within the corresponding block range. The touch point areas 120 are separated from each other and arranged along the circular arc C.

In the present embodiment, the touch point area 120 is a circle, and the center of the touch point area 120 overlaps the arc C. In some embodiments, the center of the touch point area 120 does not overlap the arc C. In other embodiments, the touch point area 120 may be any shape. Each touch point region 120 is symmetrically distributed with respect to a forward projection 1122' of the center 1122 of the knob 112 on the surface 102 of the touch panel 100. In addition, the size and shape of the conductive contact 116 are not necessarily related or limited to the size and shape of the touch point area 120, as long as the capacitance below the touch point area 120 is changed when the conductive contact 116 rotates to pass through the top.

The distance G between two adjacent touch point areas 120 is greater than the width W of the conductive contact 116. However, since the conductive contact 116 and the touch point area 120 in the present invention can be in any shape, the size of the gap G can be determined by adjusting the size of the touch point area 120, so that when the conductive contact 116 is located between two adjacent touch point areas 120, the conductive contact 116 and the touch point area 120 do not overlap.

The touch point areas 120 may be sequentially arranged on the arc C in a clockwise direction or a counterclockwise direction, and are sequentially defined as a first touch point area 121, a second touch point area 122, a third touch point area 123, a fourth touch point area 124, a fifth touch point area 125 … through an nth touch point area 12 n. In the present embodiment, the touch point areas 120 are arranged clockwise. In the operation method of the knob device 110, the first touch point area 121 has a corresponding index "1", the second touch point area 122 has a corresponding index "2", the third touch point area 123 has a corresponding index "3", the fourth touch point area 124 has a corresponding index "4", and the nth touch point area 12n … has a corresponding index n.

Therefore, on the premise that the above conditions are satisfied, the touch panel and the knob device of any specification can use various types of touch point regions 120 in the operation method thereof. Generally, after determining the specification of the knob device of the touch panel, a set of touch point regions 120 (e.g., the touch point regions 120 shown in fig. 4) satisfying the above conditions can be defined manually, and parameters (e.g., the number, size, shape, spacing, and arrangement) corresponding to the defined touch point regions 120 are substituted into the calculation steps of the operation method described below.

Fig. 5 to 9 are top views of the conductive contacts 116 sequentially rotated to different positions on the touch panel 100 according to an embodiment of the invention. In the embodiments shown in fig. 5 to 9, the conductive contacts 116 and the touch point regions 120 are the same as those in fig. 4.

As shown in fig. 5, in the present embodiment, the initial position of the conductive contact 116 is located on the first touch point area 121, that is, the first touch point area 121 is covered by the conductive contact 116. As shown in fig. 6, when the knob 112 is rotated by an angle θ 1 along the rotation direction D1, the conductive contact 116 approaches the second touch point area 122.

Referring to fig. 3A and 5, in step S2, the first position L11 of the conductive contact 116 of the knob 112 is determined by determining whether the capacitance variation range in the sensing area 104 of the touch panel 100 partially overlaps or completely overlaps any one of the touch point areas 120. In the present embodiment, the range of capacitance variation generated in the sensing region 104 is substantially equal to the area of the conductive contact 116. For simplicity of illustration, the profile of the conductive contact 116 will be taken as the range of capacitance variation. The range of capacitance variation generated in the sensing area 104 overlaps with the first touch point area 121. Therefore, the first position L11 is determined to be located on the first touch point area 121, and the first position L11 corresponds to the indicator "1". That is, the overlapping portion P11 of the capacitance variation range and any one of the touch point areas 120 is located in the first touch point area 121 below the first position L11.

Referring to fig. 3A, in step S3, the second position L12 of the predetermined conductive contact 116 and the first position L11 are located on the first touch point area 121.

Referring to fig. 3A and 6, in step S4, after the knob 112 rotates by the angle θ 1, the second position L12 of the conductive contact 116 of the knob 112 is determined again by determining whether the capacitance variation range in the sensing region 104 of the touch panel 100 partially overlaps with any one of the touch point regions 120. The range of capacitance variation generated in the sensing area 104 partially overlaps with the first touch point area 121. Therefore, the second position L12 is still determined to be located on the first touch point area 121, and the second position L12 corresponds to the indicator "1". That is, the overlapping portion P12 of the capacitance variation range and any one of the touch point areas 120 is located in the first touch point area 121 below the second position L12.

Referring to fig. 3A, fig. 5 and fig. 6, in step S5, it is determined whether the first position L11 and the second position L12 of the conductive contact 116 are located in the same touch point area 120. Since the first position L11 and the second position L12 are both located in the first touch point area 121, the determination result is yes.

Referring to fig. 3A and 6 together, in step S6', the knob 112 is determined to be in the non-switching position. It should be understood that the knob 112 is substantially rotated by the angle θ 1, but the second position L12 of the conductive contact 116 still does not reach above the second touch point region 122, so the control system of the touch panel 100 maintains the operation interface at the setting when the knob 112 is located in the first touch point region 121.

Referring to fig. 3A, fig. 6 and fig. 7, returning to step S4, the first position L21 of the conductive contact 116 is continued to the second position L12 of the previous execution of step S4 and step S5, that is, located on the first touch point area 121, and corresponds to the indicator "1". After the knob 112 is continuously rotated by an angle θ 2 along the rotation direction D1, the conductive contact 116 continuously approaches the second touch point area 122. In step S4, the range of capacitance variation generated in the sensing region 104 does not overlap with any of the touch point regions 120.

Referring to fig. 3A, fig. 6 and fig. 7, in step S5, the second position L22 is still determined to be located on the first touch point area 121. That is, when the knob 112 approaches the second touch point region 122 along the rotation direction D1, the second position L22 is determined to be located on the same touch point region 120 as the first position L21 as long as the capacitance variation range does not overlap with the second touch point region 122.

Referring to fig. 3A and 7 together, in step S6', the knob 112 is still determined to be in the non-switching position. It should be understood that the knob 112 is substantially rotated by the angle θ 2, but the second position L22 of the conductive contact 116 still does not reach above the second touch point region 122, so the control system of the touch panel 100 maintains the operation interface at the setting when the knob 112 is located in the first touch point region 121.

Referring to fig. 3A, fig. 7 and fig. 8, the process returns to step S4 again, in which the first position L31 of the conductive contact 116 is continued to the second position L22 of the previous execution of step S4 and step S5, that is, located on the first touch point region 121, and corresponds to the indicator "1". When the knob 112 is rotated by an angle θ continuously along the rotating direction D1, the conductive contact 116 continuously approaches the second touch point area 122.

At this time, the range of the capacitance variation generated in the sensing region 104 overlaps with the second touch point region 122, which may be partially overlapping or completely overlapping. Therefore, the second position L32 is determined to be located on the second touch point region 122, and the second position L32 corresponds to the indicator "2". That is, the overlapping portion P32 of the capacitance variation range and any one of the touch point areas 120 is located in the second touch point area 122 below the second position L32.

Referring to fig. 3A, 7 and 8, in step S5, since the first position L31 and the second position L32 are located on the first touch point region 121 and the second touch point region 122, respectively, the knob 112 is determined to be rotated, and steps S6 to S11 are performed, so that the touch panel 100 determines that the knob 112 is rotated clockwise or counterclockwise according to the touch point region 120 located under the first position L31 and the second position L32.

Referring to fig. 3B, fig. 7 and fig. 8, in step S6, it is determined whether the first position L31 is located on the first touch point region 121 and the second position L32 is located on the nth touch point region 12 n. In the present embodiment, since the second position L32 is not located on the nth touch point area 12n, the step S7 is continued. In step S7, it is determined whether the first position L31 is located on the nth touch point region 12n and the second position L32 is located on the first touch point region 121. In the present embodiment, since the first position L31 is not located on the nth touch point area 12n and the second position L32 is not located on the first touch point area 121, the step S8 is continued.

Referring to fig. 3B, fig. 7 and fig. 8, in step S8, it is determined whether the index of the touch point area 120 corresponding to the first position L31 is smaller than the index of the touch point area 120 corresponding to the second position L32. The indicator "1" corresponding to the first position L31 is smaller than the indicator "2" corresponding to the second position L32, so the determination result is yes, and the process continues to step S10.

Referring to fig. 3B and 8 together, in step S10, the rotation direction D1 of the knob 112 is determined to be clockwise. The control system of the touch panel 100 enables the operation interface to execute the setting corresponding to the clockwise rotation of the knob 112 from "1" to "2", or execute the setting corresponding to the clockwise rotation of the knob 112 by one step. For example, the knob 112 may be a volume control knob, and the volume is determined to be increased when the knob is rotated clockwise.

Referring to fig. 3B, 8 and 9 together, in step S11, the second position L32 is defined as another first position L41. Referring to fig. 3A, fig. 8 and fig. 9, the process returns to step S4, where the first position L41 of the conductive contact 116 is defined by the previous execution of step S11, i.e., is located on the second touch point region 122, and corresponds to the indicator "2". When the knob 112 is rotated by an angle θ 4 along the rotating direction D2, the conductive contact 116 approaches the first touch point area 121. In step S4, the range of capacitance variation generated in the sensing region 104 does not overlap with any of the touch point regions 120.

Referring to fig. 3A, 8 and 9, in step S5, unlike the case of fig. 7, the second position L42 is determined to be still located on the second touch point region 122. That is, when the knob 112 approaches the first touch point region 121 along the rotation direction D2, the second position L42 is determined to be located on the same touch point region 120 as the first position L41 as long as the capacitance variation range does not overlap with the first touch point region 121.

Referring to fig. 3A and 9 together, in step S6', the knob 112 is determined to be in the non-switching position. It should be understood that the knob 112 is substantially rotated by the angle θ 4, but the second position L42 of the conductive contact 116 still does not reach above the first touch point region 121, so the control system of the touch panel 100 maintains the operation interface at the setting when the knob 112 is located in the second touch point region 122.

At this time, the control system of the touch panel 100 maintains the operation interface at the setting when the knob 112 is located in the second touch point region 122.

Referring to fig. 3A, step S4 is repeated, and step S5 is repeated until the second position and the first position are located on two of the touch point regions, so that steps S6 to S11 are not performed again.

Similarly, if the knob 112 is rotated counterclockwise from the position shown in fig. 8 (i.e., above the second touch point region 122) to the position shown in fig. 5 (i.e., above the first touch point region 121), since the index "2" of the touch point region 120 corresponding to the first position is greater than the index "1" of the touch point region 120 corresponding to the second position, the determination result in step S8 is no, and the process continues to step S9. The rotation direction of the knob 112 is judged to be counterclockwise rotation. For example, the knob 112 may be a volume control knob, and the volume is decreased when the knob is determined to be rotated counterclockwise.

Therefore, the operation method of the present invention determines the position of the knob 112 by comparing whether the capacitance variation range of the touch panel 100 is overlapped with any one of the touch point areas 120, so that the defect that the center position of the conductive contact 116 is easily affected by capacitance dissipation when the capacitance variation is used to find out in the past can be avoided.

In addition, since the touch point regions 120 are separated from each other, and when the conductive contact 116 is located between two adjacent touch point regions 120, the conductive contact 116 does not overlap the touch point regions 120 located on both sides, when the conductive contact 116 approaches from the first position (e.g., on the first touch point region 121) to the second position (e.g., on the second touch point region 122) but the capacitance change is not generated in the touch point region below the second position, the operation method determines the knob 112 as a non-switching position, thereby avoiding the knob 112 being erroneously determined as a shaking state in which the knob is repeatedly rotated clockwise and counterclockwise. As a result, the fluency of the application operation of the touch panel 100 can be improved.

Fig. 10 to 11 are top views illustrating the conductive contacts 116 rotated to different positions on the touch panel 100 according to another embodiment of the invention. In the embodiment shown in fig. 10 to 11, the conductive contacts 116 and the touch point regions 120 are also provided as the same as those in fig. 4, and steps S6 and S7 of the operation method of the knob device 110 in fig. 3A and 3B are described. In the present embodiment, descriptions similar to those of the foregoing embodiments will be simply explained or omitted.

As shown in fig. 10, in the present embodiment, the initial position of the conductive contact 116 is located on the first touch point area 121. As shown in fig. 11, when the knob 112 is rotated by an angle θ 5 along the rotating direction D3, the conductive contact 116 moves to the nth touch point area 12 n.

Referring to fig. 3A and 11, in step S2, it is determined that the first position L51 is located in the first touch point area 121, and corresponds to the indicator "1". In step S4, it is determined that the second position L52 is located in the nth touch point region 12n and corresponds to the index "n".

Since the indexes of the touch point area 120 are 1 to n arranged in the clockwise direction, the index "1" corresponding to the first position L51 is smaller than the index "n" corresponding to the second position L32, and if the knob 112 is determined to be rotated clockwise in step S8. In order to solve the above problem, when one of the first position L51 or the second position L52 corresponds to the nth touch point area 12n, the method of the present invention first performs step S6 and step S7.

Referring to fig. 3B and 11, in step S6, the determination result is yes, and the process proceeds to step S9. In step S9, the rotation direction D3 of the knob 112 is determined to be counterclockwise rotation. The control system of the touch panel 100 enables the operation interface to execute the corresponding setting when the knob 112 is rotated from "1" to "n" counterclockwise, or execute the corresponding setting when the knob 112 is rotated one step counterclockwise.

Similarly, if the knob 112 is rotated from the position shown in fig. 11 (i.e., above the nth touch point region 12 n) to the position shown in fig. 10 (i.e., above the first touch point region 121), the determination result in step S6 is no, and the determination result after proceeding to step S7 is yes. Therefore, continuing to step S10, the rotational direction of the knob 112 is determined to be clockwise rotation.

In steps S6 and S7, it can be determined that the indicator of the touch point area 120 relates to "n" and "1" first, so that in step S8, the knob 112 can be determined to be rotated clockwise or counterclockwise only by comparing the relative magnitudes of the indicators corresponding to the first position and the second position.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A method of operating a rotary knob device, comprising:

judging a first position of a conductive contact of a knob, wherein the first position is located on one of a plurality of touch point areas on the surface of the touch panel, and the touch point areas are separated from each other and arranged along an arc;

after the knob rotates for an angle, judging a second position of the conductive contact of the knob, wherein the second position is located on one of the touch point areas; and

when the first position and the second position are respectively located on two of the touch point areas, the touch panel judges whether the knob rotates clockwise or anticlockwise according to the two touch point areas.

2. The method of operating a rotary knob assembly according to claim 1, wherein prior to determining said first position of said conductive contact of said rotary knob, said method further comprises:

defining the radius of the arc as the distance between the center of the conductive contact and the orthographic projection of the center of the knob on the surface of the touch panel.

3. The method of operating a rotary knob assembly according to claim 1, wherein prior to determining said first position of said conductive contact of said rotary knob, said method further comprises:

and adjusting the sizes of the touch point areas, so that when the conductive contact is positioned between two adjacent touch point areas, the two adjacent touch point areas are not overlapped with the conductive contact.

4. The method of operating a rotary knob assembly according to claim 1, wherein determining said first position of said conductive contact of said rotary knob further comprises:

and judging whether the capacitance variation range of the touch panel is overlapped with a part of one of the touch point areas, wherein the part is positioned in the touch point area below the first position.

5. The method of operating a rotary knob assembly according to claim 1, wherein prior to determining said second position of said conductive contact of said rotary knob, said method further comprises:

and presetting the second position and the first position to be located in one of the touch point areas.

6. The method of operating a rotary knob assembly according to claim 1, wherein determining said second position of said conductive contact of said rotary knob further comprises:

and judging whether the capacitance variation range of the touch panel is overlapped with a part of one of the touch point areas, wherein the part is positioned in the touch point area below the second position.

7. The method of operating a rotary knob assembly according to claim 1, wherein prior to determining said first position of said conductive contact of said rotary knob, said method further comprises:

determining the number n of the touch point areas according to the size of the conductive contact points of the knob; and

sequentially defining a first touch point area, a second touch point area and … nth touch point area on the circular arc in a clockwise direction or a counterclockwise direction, wherein indexes corresponding to the first touch point area, the second touch point area and … the nth touch point area are 1, 2 and … n in sequence.

8. The operating method of the knob device according to claim 7, wherein the first touch area to the nth touch area are arranged in a clockwise direction, and after determining the second position of the conductive contact of the knob, the operating method further comprises:

when the first position is located on the nth touch point region and the second position is located on the first touch point region, it is determined that the knob is rotated in a clockwise direction, or when the first position is located on the first touch point region and the second position is located on the nth touch point region, it is determined that the knob is rotated in a counterclockwise direction.

9. The operating method of the knob device according to claim 7, wherein the first touch area to the nth touch area are arranged in a clockwise direction, and after determining the second position of the conductive contact of the knob, the operating method further comprises:

when the index of the touch point area corresponding to the first position is smaller than the index of the touch point area corresponding to the second position, it is determined that the knob is rotated clockwise.

10. The operating method of the knob device according to claim 1, wherein the touch panel determines whether the knob is rotated clockwise or counterclockwise according to the two-touch-point area, and the operating method further comprises:

defining the second location as another first location.