TWI471813B - Touch device and touch point detecting method thereof - Google Patents

Description

Touch device and touch point detecting method thereof

The present invention relates to a touch device and a touch point detecting method thereof, and more particularly to a touch device capable of distinguishing effective and ineffective touch points from a plurality of touch points and a touch point detecting method thereof.

Since current consumer electronic products are designed in a light, thin, short, and small direction, there is no room for traditional input devices such as a mouse and a keyboard. With the advancement of touch technology, touch devices have been widely used in various consumer electronic products such as tablet computers, mobile phones, personal digital assistants (PDAs), and all in ones. As its input device. Although the touch device is a convenient input and operation device, when the user performs handwriting input, the palm is sometimes placed on the touch panel, and multiple touch points are simultaneously generated on the touch panel. The touch device cannot be accurately operated. Therefore, when the user performs handwriting input, the palm can only be suspended without touching the touch panel, which is quite inconvenient for the user.

An object of the present invention is to provide a touch device and a touch point detecting method thereof, which can distinguish effective and ineffective touch points from a plurality of touch points to solve the above problem.

According to an embodiment, the touch device of the present invention includes a touch panel and a processing unit, wherein the processing unit is electrically connected to the touch panel. The processing unit is configured to detect N touch points acting on the touch panel, calculate the distance between each two touch points according to the detection order of the N touch points to obtain N-1 distances, and find out the composition. The touch point of the maximum distance of the N-1 distances is determined to be an effective touch point of the touch point connected to the single touch point, and the other N-1 touches are determined. The handle is an invalid touch point, where N is a positive integer greater than two.

According to another embodiment, the touch point detecting method of the present invention is applicable to a touch device. The touch device includes a touch panel, and the touch point detection method includes: detecting N touch points acting on the touch panel, wherein N is a positive integer greater than 2; and according to N touches The detection order of the points calculates the distance between each two touch points to obtain N-1 distances; finds the two touch points that constitute the maximum distance among the N-1 distances; and determines that only the two touch points are The touch point connected to the single touch point is an effective touch point, and the other N-1 touch points are determined to be invalid touch points.

In summary, when the user places the palm on the touch panel for handwriting input Or the operation of other application functions, the invention can distinguish the effective and invalid touch points from the plurality of touch points, so that the user can use the general writing habit to place the palm on the touch panel for handwriting input or The operation of other application functions, while avoiding the inconvenience or discomfort caused by the palm hanging.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

1, 1'‧‧‧ touch device

10‧‧‧Touch panel

12‧‧‧Processing unit

14‧‧‧ display panel

16‧‧‧First sensing unit

18‧‧‧Handheld touch elements

30‧‧‧ palm

32‧‧‧ stylus

140, 140'‧‧‧ operation interface

180‧‧‧Flexible compression end

182‧‧‧Switch circuit

184‧‧‧Second sensing unit

P0-P8‧‧‧ touch point

D1-D8‧‧‧Distance

S100-S106‧‧‧Steps

FIG. 1 is a schematic diagram of a touch device according to an embodiment of the invention, wherein a palm and a stylus act on the touch panel.

FIG. 2 is a functional block diagram of the touch device in FIG. 1.

FIG. 3 is a schematic diagram of a plurality of touch points acting on the touch panel in FIG. 1.

FIG. 4 is a flow chart of a touch point detecting method according to an embodiment of the invention.

FIG. 5 is a schematic diagram showing the operation interface of the display panel of the touch device in FIG. 1 .

FIG. 6 is a schematic diagram showing another operation interface of the display panel of the touch device in FIG. 1 .

FIG. 7 is a functional block diagram of a touch device according to another embodiment of the present invention.

Please refer to FIG. 1 to FIG. 4 . FIG. 1 is a schematic diagram of a touch device 1 according to an embodiment of the present invention, wherein a palm 30 and a stylus 32 act on the touch panel 10; FIG. 3 is a schematic diagram of a plurality of touch points acting on the touch panel 10 in FIG. 1; FIG. 4 is a touch diagram according to an embodiment of the invention. Flow chart of the point detection method. The touch point detection method in FIG. 4 can utilize the first picture This is realized with the touch device 1 in FIG. 2 .

As shown in FIG. 1 and FIG. 2 , the touch device 1 includes a touch panel 10 , a processing unit 12 , and a display panel 14 . The processing unit 12 is electrically connected to the touch panel 10 and the display panel 14 . Generally, the touch panel 10 is disposed on the display panel 14, and thus the touch panel 10 and the display panel 14 are labeled at the same place in FIG. In practical applications, the touch device 1 can be any electronic device with data processing and touch functions, such as a mobile phone, a personal digital assistant, a tablet computer, a touch panel, a touch screen, etc. The touch panel 10 can be a resistor. The touch panel, the capacitive touch panel or other touch panel; the processing unit 12 can be a processor or controller having a data processing function; the display panel 14 can be a liquid crystal display or other display. In general, the touch device 1 is also provided with soft and hard components necessary for operation, such as a memory, a power supply, an operating system, an application program, a communication module, etc., depending on the actual application. It should be noted that, if the touch device 1 is a touch panel without a display function, the touch device 1 may not include the display panel 14 .

As shown in FIG. 1 and FIG. 3 , when the user places the palm 30 on the touch panel 10 to perform handwriting input or other application functions with the stylus 32, the processing unit 12 generates the touch panel 10 according to the touch panel 10 . The signal will detect N touch points acting on the touch panel 10 (step S100 in FIG. 4), where N is a positive integer greater than 2. After detecting the N touch points acting on the touch panel, the processing unit 12 calculates the distance between each two touch points according to the detection order of the N touch points to obtain N-1 Distance (step S102 in Fig. 4). Next, the processing unit 12 finds two touch points that constitute the largest distance among the N-1 distances (step S104 in FIG. 4). Finally, the processing unit 12 determines that the touch point connected to the single touch point among the two touch points having the largest distance is an effective touch point, and determines that the other N-1 touch points are invalid. Touch point (step S106 in Fig. 4).

Taking the embodiment illustrated in FIG. 3 as an example, the processing unit 12 detects that there are nine touch points P0-P8 (ie, N=9) acting on the touch panel 10, wherein the touch point P0 is The stylus 32 is touched by the touch panel 10, and the touch points P1-P8 are generated by the palm 30 touching the touch panel 10. It should be noted that the touch point P0 can also be generated by the user's finger or the user holding other objects to touch the touch panel 10, depending on the actual application. In this embodiment, the processing unit 12 can be in a column-major order, a column-based order. (row-major order), scanning the touch panel 10 in the order of outward expansion of the concentric circles or in other scanning manners to sequentially detect the nine touch points P0-P8.

As shown in FIG. 3, the processing unit 12 detects that the detection order of the nine touch points P0-P8 acting on the touch panel 10 is sequentially P0, P1, ..., P8, and the processing unit 12 will calculate the distance between each two touch points according to the detection order of the nine touch points P0-P8 to obtain eight distances D1-D8. For example, when the processing unit 12 detects the touch points P0 and P1, the processing unit 12 first calculates the distance D1 between the touch points P0 and P1, and then, when the processing unit 12 detects the touch point again. At P2, the processing unit 12 calculates the distance D2 between the touch points P1 and P2, and so on.

Next, the processing unit 12 finds two touch points that constitute the largest distance among the eight distances D1-D8. As shown in FIG. 3, since the touch point P0 is relatively far away from the other touch points P1-P8, the maximum distance among the eight distances D1-D8 is the distance D1 between the two touch points P0 and P1.

Finally, the processing unit 12 determines that the touch points connected to the single touch point in the two touch points P0 and P1 having the maximum distance D1 are valid touch points, and the other touch points are determined to be invalid touches. Control point. As shown in FIG. 3, since the touch point P0 is only connected to the single touch point P1, the processing unit 12 determines that the touch point P0 is a valid touch point, and determines the other eight touch points P1-P8. Invalid touch point. Thereby, the processing unit 12 only reacts to the touch point P0, ignoring the other eight touch points P1-P8. It should be noted that, when the touch point P0 has not left the touch panel 10, the processing unit 12 can continuously respond according to the movement track of the touch point P0, and after the touch point P0 leaves the touch panel 10, The touch points re-execute the above steps.

In other words, when the user places the palm 30 on the touch panel 10 to perform handwriting input or other application functions with the stylus 32, the touch point P0 generated by the stylus 32 touching the touch panel 10 is relatively The touch point P1-P8 generated by the touch panel 10 is touched away from the palm 30. Therefore, the processing unit 12 can quickly distinguish between valid and invalid according to the distance between each two touch points and the connection relationship between the touch points. Touch point.

Please refer to FIG. 5 and FIG. 6 . FIG. 5 is a schematic diagram showing the operation interface 140 of the display panel 14 of the touch device 1 in FIG. 1 , and FIG. 6 is the touch device in FIG. 1 . The display panel 14 of 1 displays a schematic view of another operational interface 140'. As shown in FIG. 5 and FIG. 6 , the display panel 14 can display an operation interface 140 or 140 ′ for the user to operate to drive the processing unit 12 to turn on or off a touch point detection function, wherein FIG. 5 The operation interface 140 is shown in a function menu, and the operation interface 140' shown in FIG. 6 can be set in any position in the display screen in a shortcut switch, and the user can move the operation interface 140'. To the desired location, but not limited to it, depending on the application. When the touch point detection function is enabled, the processing unit 12 performs a touch point that determines whether the plurality of touch points are valid or invalid when detecting a plurality of touch points acting on the touch panel 10 program.

Please refer to FIG. 7. FIG. 7 is a functional block diagram of a touch device 1' according to another embodiment of the present invention. The main difference between the touch device 1 and the touch device 1 is that the touch device 1 ′ further includes a first sensing unit 16 and a handheld touch element 18 , wherein the first sensing unit 16 is electrically connected. The processing unit 12 includes a flexible pressing end 180, a switching circuit 182 and a second sensing unit 184. The flexible pressing end 180 is coupled to the switching circuit 182 to selectively turn on or open the switching circuit 182 , and the second sensing unit 184 is electrically connected to the switching circuit 182 . In this embodiment, the hand-held touch element 18 can be implemented in the form of a stylus, and the flexible pressing end 180 can be made of rubber or other soft material to be elastically deformed when pressed. In addition, the first sensing unit 16 can be a Radio Frequency Identification (RFID) sensor, a Near Field Communication (NFC) sensor, or other sensors, and the second sensing unit 184 can be a corresponding The RFID tag, NFC tag or other tag of the first sensing unit 16.

When the hand-held touch element 18 is pressed on the touch panel 10 with the flexible pressing end 180, the flexible pressing end 180 is elastically deformed by the pressure, so that the switch circuit 182 is turned on. At this time, the first sensing unit 16 senses the second sensing unit 184, and then drives the processing unit 12 to turn on the touch point detecting function described above. When the touch point detection function is enabled, the processing unit 12 performs a touch point that determines whether the plurality of touch points are valid or invalid when detecting a plurality of touch points acting on the touch panel 10 program. On the other hand, after the flexible pressing end 180 of the hand-held touch element 18 leaves the touch panel 10, the flexible pressing end 180 returns to the original state, so that the switch circuit 182 forms an open circuit. The element 16 cannot sense the second sensing unit 184, and the processing unit 12 turns off the touch point detection function described above.

In other words, the present invention can be operated by a user in a software form (that is, the above-described operation interface 140 or 140') and/or a hardware form (that is, the above-mentioned hand-held touch element 18 is matched with the first sensing unit 16). The touch processing function is turned on or off by the driving processing unit 12.

In addition, the control logic of the touch point detection method shown in FIG. 4 can be implemented by software design. Of course, each part or function of these control logic can be realized by a combination of software, hardware or software and hardware. In addition, the control logic can be embodied in a computer readable storage medium, wherein the computer can read the representative information stored in the storage medium and can be executed by the touch device 1 to generate a control command, thereby controlling The touch device 1 performs a corresponding function.

In summary, when the user places the palm on the touch panel for handwriting input or other application functions, the present invention can distinguish valid and invalid touch points from multiple touch points, so that the use The general written habit can be used to place the palm on the touch panel for handwriting input or other application functions, while avoiding the inconvenience or discomfort caused by the palm hanging.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

S100-S106‧‧‧Steps

Claims (10)

A touch device includes: a touch panel; and a processing unit electrically connected to the touch panel for detecting N touch points acting on the touch panel, according to the N touches The detection order of the points calculates the distance between each two touch points to obtain N-1 distances, finds the two touch points that constitute the maximum distance among the N-1 distances, and determines that only the two touch points are The touch point connected to the single touch point is an effective touch point, and the other N-1 touch points are determined to be invalid touch points, and N is a positive integer greater than 2. The touch device of claim 1, wherein the processing unit scans the touch panel in a column-major order to sequentially detect the N touch points. The touch device of claim 1, wherein the processing unit scans the touch panel in a row-major order to sequentially detect the N touch points. The touch device of claim 1, further comprising a display panel electrically connected to the processing unit for displaying an operation interface, the operation interface for driving the processing unit to turn on or off a touch point detection The function, when the touch point detection function is turned on, the processing unit performs a program for determining whether the N touch points are valid or invalid touch points. The touch device of claim 1 , further comprising a first sensing unit and a handheld touch component, wherein the first sensing unit is electrically connected to the processing unit, and the handheld touch component comprises a flexible a pressing end, a switching circuit, and a second sensing unit, the flexible pressing end is coupled to the switching circuit to selectively turn on or open the switching circuit, and the second sensing unit is electrically connected to the switching circuit When the handheld touch element is pressed on the touch panel by the flexible touch end, the switch circuit is turned on, so that the first sensing unit senses the second sensing unit, thereby driving the processing unit to open a touch. The control point detection function, when the touch point detection function is turned on, the processing unit performs a program for determining whether the N touch points are valid or invalid touch points. A touch point detecting method is applicable to a touch device. The touch device includes a touch panel. The touch point detecting method includes: detecting N touch points acting on the touch panel. N is a positive integer greater than two; Calculating the distance between each two touch points according to the detection order of the N touch points to obtain N-1 distances; finding two touch points constituting the maximum distance among the N-1 distances; and determining The touch point connected to only one single touch point in the two touch points is an effective touch point, and the other N-1 touch points are determined to be invalid touch points. The method for detecting a touch point according to claim 6, wherein the detecting step comprises: scanning the touch panel in a sequence of behaviors to sequentially detect the N touch points. The method for detecting a touch point according to claim 6, wherein the detecting step comprises: scanning the touch panel in a column-based order to sequentially detect the N touch points. The method for detecting a touch point according to claim 6, further comprising: displaying an operation interface, wherein the operation interface is used to enable or disable a touch point detection function; and when the touch point detection function is enabled, A program for determining whether the N touch points are valid or invalid touch points. The touch point detection method of claim 6, the touch device further includes a first sensing unit and a handheld touch element, the handheld touch element comprising a flexible pressing end and a switching circuit And a second sensing unit, the flexible pressing end is coupled to the switching circuit to selectively turn on or open the switching circuit, the second sensing unit is electrically connected to the switching circuit, and the touch point detecting method is The method further includes: operating the handheld touch element to press the flexible pressing end on the touch panel to turn on the switch circuit, so that the first sensing unit senses the second sensing unit, thereby opening a touch The handle detection function; and when the touch point detection function is turned on, a program for determining whether the N touch points are valid or invalid touch points is performed.