WO2013075345A1 - Touch recognition method and device, space mouse and control method thereof - Google Patents

Abstract

A touch recognition method and device, a space mouse and a control method thereof. The touch recognition method includes: taking the number of times of charge transfer of each electrode when the voltage corresponding to the total charge quantity transferred on each electrode of a touch key structure reaches a reference voltage as a charge sample value of a key corresponding to the electrode when the touch key structure is touched or will be touched; obtaining a long-term average value of the charge sample value within a first preset time; recognizing a key in which the difference between the long-term average value and the currently obtained charge sample value is greater than or equal to a touch sensitive threshold value as a touched key, wherein the touch key structure includes: a touch panel and a detection plate isolated from the touch panel in an insulated way, and the touch panel is provided with a plurality of metal keys, and the detection plate is provided thereon with a plurality of electrodes corresponding to the metal keys. The technical solution in the present invention can improve the accuracy of touch recognition, and effectively avoids the jitter of the mouse point when a space mouse presses down a key with a confirm function.

Description

 Touch recognition method and device, space mouse and control method thereof. The application is submitted to the State Intellectual Property Office of China on November 23, 2011, and the application number is 201110376337.9, and the invention name is "touch recognition method and device, space mouse and control method thereof". The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference. Technical field

 The present invention relates to the field of touch sensing technologies, and in particular, to a touch recognition method and device, a space mouse and a control method thereof. Background technique

At present, the common mouse devices on the market are divided into two types according to the principle of their operation, one is a ball mouse and the other is an optical mouse. Among them, the ball mouse uses the direction and path of the conversion ball on the placed desktop or plane to control the pointing position of the mouse pointer (cursor or cursor) displayed in the computer system; and the optical mouse is generated by using The light is reflected on the table or the plane to control it. Most of the positioning of the mouse pointer of the optical mouse relies on optical sensors or laser sensors, which are based on physical optics, so that the sensor needs to rely on a platform such as a desktop. In addition, in many occasions, such as computer multimedia teaching, users want to manipulate the mouse pointer in the air or manipulate the mouse pointer in the air to achieve multimedia TV playback, web browsing and other applications, only using traditional sensors can not be achieved, so space The mouse came into being. The space mouse is an input device that operates the screen cursor (mouse pointer) like a traditional mouse, but does not need to be placed on any plane. In the air, it can directly control the mouse pointer by relying on the perception of the air movement posture. In order to realize the perception of the air movement attitude, the inertial device is generally set in the space mouse, and the inertial device measurement technology is used to track the posture of the motion carrier. Most of the current mouse devices still use the traditional mechanical button structure, which affects the user's experience. Traditional mechanical buttons have a limited life and poor handling experience, and their abrupt appearance is obviously unsightly and difficult to clean. Therefore, touch buttons are increasingly used as an alternative to traditional mechanical buttons in various electronic applications. In the product, not only can improve reliability, but also help to achieve Fully sealed and modern in design. In fact, touch-sensitive buttons have been gradually used in the market to replace traditional mechanical buttons. Among them, the design of capacitive touch buttons is also a hot spot in touch-sensitive button technology.

 The capacitive touch button systems that are commonly used today use plastic as the material of the touch panel, and generally do not contain metal components, so as to avoid triggering of misalignment. The plastic panel has a PCB board (printed circuit board) sensing disc. By touching the plastic panel directly above the PCB board sensing disc, the button can be triggered to realize the touch operation. However, for the existing capacitive touch button system, if the panel material is made of metal material or the panel material contains metal components, the touch will trigger the button at any position of the panel, which cannot identify which button the trigger is assigned to. , which will trigger a touch operation error and affect the user's use.

 Therefore, how to realize the use of a metal material or a metal-containing panel in the touch button structure and achieve the purpose of accurately recognizing the touch has become a technically urgent problem to be solved. Summary of the invention

The problem to be solved by the present invention is to provide a touch recognition method and device, a space mouse and a control method thereof, so as to improve the accuracy of the touch recognition, and effectively avoid the shaking of the mouse pointer when the space mouse presses the button of the confirmation function. In order to solve the above problem, the technical solution of the present invention provides a touch recognition method, including: using the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charges transferred on each electrode of the touch button structure reaches a reference voltage Pressing a charge sample value when the touch key structure faces a touch or proximity touch; obtaining a long-term average value of the charge sample value in the first preset time; and comparing a difference between the long-term average value and the currently obtained charge sample value is greater than or The touch button is configured as a touched button; the touch button structure includes: a touch panel and a detecting board insulated from the touch panel, wherein the touch panel is provided with a plurality of metal buttons, the detecting board There are a plurality of electrodes respectively corresponding to the metal buttons. Optionally, the touch sensing threshold is associated with the long-term value of the charge sample in the first preset time. Average.

 Optionally, after identifying the touched button, stopping updating the long-term average value of the charge sample values in the first preset time until the difference between the long-term average value and the currently obtained charge sample value is less than the Touch sensing threshold. Optionally, the long-term average value of the charge sample values in the first preset time is obtained by summing and calculating the average value of the plurality of charge sample values obtained in the first preset time or Obtained in a weighted average manner. In order to solve the above problem, the technical solution of the present invention further provides a method for controlling a space mouse, comprising: after the touched key is recognized by the touch recognition method, generating a corresponding first control signal according to the recognition result to control the space mouse Operation, implementing a preset function of the touched button. Optionally, the preset function of the touched button includes a confirmation function for the selected position of the mouse pointer controlled by the space mouse, and if the touched button is recognized as a button for implementing the confirmation function, delaying the second preset The time generates the first control signal. Optionally, the control method of the space mouse further includes: shielding, during a second preset time of delay, processing of output data of the inertial device included in the space mouse, where the data output by the inertial device is used to implement Spatial positioning of the space mouse to control movement of the mouse pointer. Optionally, the preset function of the touched button is a function of triggering movement of the mouse pointer controlled by the space mouse, and the detection panel of the touch button structure further includes a membrane button corresponding to the touched button And generating a corresponding second control signal when the membrane button is pressed to implement a confirmation function for the selected position of the mouse pointer controlled by the space mouse.

 Optionally, the control method of the space mouse further includes delaying the third preset time to generate the second control signal.

Optionally, the control method of the space mouse further includes: shielding, during a third preset time delay, processing of output data of the inertial device included in the space mouse, where the data output by the inertial device is used to implement The spatial positioning of the space mouse controls the movement of the mouse pointer. In order to solve the above problem, the technical solution of the present invention further provides a touch recognition apparatus, including: a sampling unit, adapted to use a voltage corresponding to a total amount of charges transferred on each electrode of the touch button structure The number of charge transfer times of each electrode when the voltage is referenced is used as a charge sample value of the button corresponding to the electrode when the touch button structure faces a touch or proximity touch; the averaging unit is adapted to obtain the charge sample value in the first preset time a long-term average; an identification unit, configured to identify a button whose difference between the long-term average value and the currently obtained charge sample value is greater than or equal to a touch-sensing threshold as a touched button; the touch button structure includes: a touch panel and a The touch panel is insulated and insulated, and the touch panel is provided with a plurality of metal buttons, and the detecting board has a plurality of electrodes respectively corresponding to the metal buttons.

 Optionally, the sampling unit includes: a plurality of unit capacitors respectively connected to respective electrodes in the touch button structure;

 a plurality of voltage detecting units respectively connected to the plurality of unit capacitors, detecting a voltage across the corresponding unit capacitor, and outputting a counting signal when the voltage across the unit capacitor reaches a reference voltage, the counting signal including The counting value of the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charge transferred on the electrode reaches the reference voltage; the collecting unit is connected to the plurality of voltage detecting units, and is adapted to collect the count value included in the counting signal output by each voltage detecting unit As the charge sample value.

 In order to solve the above problem, the technical solution of the present invention further provides a space mouse, comprising: a control unit and the touch recognition device and a touch button structure, wherein the control unit is adapted to: after the touch recognition device recognizes the touched button, And generating a corresponding first control signal according to the recognition result to control the operation of the space mouse, and implementing a preset function of the touched button. Compared with the prior art, the technical solution of the present invention has the following advantages:

When the touch key structure faces a touch or a proximity touch, the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charge transferred on each electrode of the touch key structure reaches the reference voltage is used as the button corresponding to the electrode The touch button structure faces a charge sample value when the touch or proximity touch is performed, and obtains a long-term average value of the charge sample value in the first preset time, and the difference between the long-term average value and the currently obtained charge sample value is greater than or equal to the touch sense The threshold button is recognized as a touched button, thereby improving the accuracy of touch recognition. After the touched button is recognized, the corresponding first control signal can be generated according to the recognition result to accurately control the operation of the space mouse, and the preset function of the touched button is implemented, thereby improving the user's operation experience on the space mouse.

 If the preset function of the touched button includes the confirmation function of the selected position of the mouse pointer controlled by the space mouse, delaying the second preset time when the touched button is recognized as the button for implementing the confirming function The first control signal can prevent the jitter of the mouse pointer when the confirmation function is implemented, and improve the user operation experience.

 In addition, during the second preset time of the delay, by shielding the processing of the output data of the inertial device included in the space mouse, the shaking of the mouse pointer controlled by the space mouse is further prevented, and the user operation experience is improved. If the preset function of the touched button is a function of triggering movement of the mouse pointer controlled by the space mouse, and the detection panel of the touch button structure further includes a membrane button corresponding to the touched button, when When the membrane button is pressed, a corresponding second control signal is generated to implement a confirmation function of the selected position of the mouse pointer controlled by the space mouse, and the mouse controlled by the space mouse can also be prevented by the delay and shielding manner. The jitter of the pointer improves the user experience. DRAWINGS

 1 is a schematic flow chart of a touch recognition method according to Embodiment 1 of the present invention;

 2 is a schematic top plan view of a touch button structure according to Embodiment 1 of the present invention; FIG. 3 is a cross-sectional view of the touch button structure shown in FIG. 2 along A-A direction;

 4 is a schematic diagram of a touch recognition device according to the touch key structure shown in FIG. 2; FIG. 5 is a schematic structural diagram of a touch recognition device according to a first embodiment of the present invention; FIG.

7 is a schematic diagram of a touch button structure provided by Embodiment 2 of the present invention; FIG. 8 is a schematic structural diagram of a space mouse according to Embodiment 2 of the present invention; and FIG. 9 is a schematic diagram of touch recognition of a pressure touch button structure. The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Specific details are set forth in the following description in order to provide a thorough understanding of the invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar promotion without departing from the scope of the present invention. The invention is therefore not limited by the specific embodiments disclosed below. Embodiment 1 FIG. 1 is a schematic flowchart of a touch recognition method according to Embodiment 1 of the present invention. As shown in FIG. 1 , the touch recognition method includes: Step S101: The voltage corresponding to the total amount of charge transferred on each electrode of the touch button structure reaches a charge sample value when the structure faces a touch or a proximity touch; a long-term average value of the charge sample values in a predetermined period of time; in step S103, the button whose difference between the long-term average value and the currently obtained charge sample value is greater than or equal to the touch-sensing threshold is recognized as a touched button.

 The touch button structure includes: a touch panel and a detecting board, wherein the touch panel is insulated from the detecting board, the touch panel is provided with a plurality of metal buttons, and the detecting board has multiple Corresponding to the electrodes of the metal button, the mutually insulated metal buttons and the corresponding electrodes constitute a plate capacitor.

The above touch recognition method will be described in detail below with reference to the accompanying drawings. 2 is a schematic top plan view of a touch button structure according to Embodiment 1 of the present invention. 3 is a cross-sectional view of the touch button structure of FIG. 2 taken along the line AA. With reference to FIG. 2 and FIG. 3 , in the embodiment, the touch button structure specifically includes: a touch panel 201 and a detecting board 203 opposite to the touch panel 201 , the touch panel 201 includes a board body 201 a and a plurality of metal The button 1-5 is separated from the board 201a by the insulating layer 202, and the touch panel 201 is grounded. The detecting board 203 has a plurality of electrodes A to E corresponding to the metal buttons, respectively. The detecting board 203 and the The touch panel 201 is insulated from each other; the area between the plurality of metal buttons and the corresponding electrodes constitutes a plate capacitor.

 In the above touch button structure, each metal button is separated from the plate body 201a by the insulating layer 202, and a plurality of buttons each having a separate key position are formed. By grounding the touch panel 201, the button is triggered only when the user presses the metal button (triggering the touch sensing event), and there is no response between the adjacent two metal buttons, and the sensing range is better.

 Moreover, when the user's finger touches the metal button, a part of the electric charge escapes through the human body, and the electric charge is transferred through the electrode corresponding to the metal button, thereby realizing the touch recognition of the metal button by detecting the charge transfer. It can be seen that the touch button structure can be a touch button structure that realizes zero pressure, and the user can detect the touch behavior more accurately without pressing the metal button hard, thereby improving the user experience.

 In a specific embodiment, the touch surface of the metal button may be flush with the board 201a or higher or lower than the board 201a.

 In a specific embodiment, the metal button and the plate body 201a may be of the same material to save manufacturing cost and optimize the manufacturing process. For example, the metal button and the material of the plate body 201a may each be copper. In actual manufacturing, the plate body 201a may be formed first, and the hole size of the buttons and the key position distribution may be punched on the plate body 201a, and the hole size of the punching hole should be larger than the size of each button. Then, each metal button is formed, and each metal button is aligned and fixed with the plate body 201a, and an insulating material is formed in the gap between each metal button and the plate body 201a to form an insulating layer 202 for isolation.

 In addition, the distance between one side of the metal button relative to the detecting board and the detecting board may be smaller than the distance between one side of the board body relative to the detecting board and the detecting board It further makes it easier for the charge to escape through the metal button (ie, escaping to the metal button is easier than escaping to the grounded touch panel).

 In a specific embodiment, each metal button may be a solid metal disk, and the shape of the solid metal disk may be any shape suitable for the structure of the touch button, such as a circle or a square, which is not limited herein.

In a specific embodiment, each metal button can also be a metal character, and the metal button can simultaneously implement the touch detection and prompt button functions, and no need to re-print the button characters on the board 201a. In a specific embodiment, the material of the insulating layer 202 may be glass, or may be other known insulating materials. The electrode is a copper foil, or it may be other known various conductive materials.

It should be noted that the five metal buttons on the touch panel 201 are merely examples, and the implementation manner thereof is not limited. The number of the buttons and the function of the button can be set according to the actual desired touch function. For example, in other embodiments, the touch panel 201 can have 8 or 20 metal buttons. More. It can be seen from the description of the above-mentioned touch button structure that when the touch button structure is to be operated, the influence of the user's finger on the amount of charge in the charge accumulation region is not directly achieved by touching the charged electrode, but is contacted. Metal button. The principle that causes the above to occur is that each of the electrodes generates a source electric field after charging, the source electric field is an electrostatic field, and a charge accumulation region is formed on each electrode surface. When the user's finger touches the metal button, the electric field distribution is changed, causing the transfer of the charge in the charge accumulation region, and the amount of charge in the charge accumulation region is changed. It can be seen that once a dramatic change in the amount of charge occurs in the charge accumulation region of an electrode, it is generally considered that the metal button corresponding to the electrode has a touch operation. Therefore, based on the situation, the charge sample value of the corresponding charge accumulation region of the button when facing the touch can be obtained by performing charge replenishment on the charge accumulation region, and based on the charge sample value as the determination basis for the occurrence of the touch-sensing event. . Specifically, in step S101, the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charge transferred on each electrode of the touch button structure reaches the reference voltage is used as a touch or adjacent button on the touch button structure. The value of the charge sample when touched. As described above, in the touch button structure described in the embodiment, the material of the board body and the metal button included in the touch panel is copper, and the material of the insulating layer between the metal button and the board is glass, and the detecting board is The electrode corresponding to the position of the metal button is copper foil. FIG. 4 is a schematic diagram of touch recognition by using the touch key structure shown in FIG. 2 . Referring to FIG. 4 , in a specific implementation, a plurality of unit capacitors may be disposed, and respectively connected to electrodes (copper foils) in the touch button structure. When a finger touches or approaches a certain metal button on the touch panel, a part of the electric charge escaping from the human body generates charge transfer via the copper foil, and since the unit capacitance is electrically connected to the copper foil, the electric charge is Will transfer to the unit capacitor, this process is equivalent to the unit capacitance Charge it. In the process of charging the unit capacitor, the charge is usually transferred from the respective electrodes of the touch button structure to the respective unit capacitors at a certain pulse frequency (the amount of charge transferred may be different each time), and therefore, the unit capacitance Fully charging requires a multiple charge transfer process, and the number of charge transfer times in step S101 is directed to the number of charge transfer processes occurring during the charging of the unit capacitor. In actual implementation, a unit capacitor with a small capacitance can be used, and a pF capacitor, for example, 0.5 pF can be usually used. Thus, the unit capacitance is more easily filled with the charge transferred from the copper foil. Since the voltage across the capacitor is easily measured, the charge transfer can be obtained by detecting the voltage across the capacitor. Specifically, a plurality of voltage detecting devices correspondingly connected to the plurality of unit capacitors may be disposed, and a voltage across the corresponding unit capacitor is detected in real time, and a voltage across the unit capacitor is compared with a voltage (reference voltage) at both ends when the unit capacitor is full. When the voltage across the unit capacitor reaches the reference voltage, the counting signal is output, and the counting signal includes a count value of the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charges transferred on each electrode reaches the reference voltage, that is, The number of charge transfer times of each electrode in the process of completing the full charge of the unit capacitor. It should be noted that, since the environment is in a process of constant change, the amount of charge on the touch button structure is also constantly changing. Therefore, the amount of charge transferred to the unit capacitor is not the same every time, and the unit capacitor is completed once. In the process of electricity, if the amount of charge transferred to the unit capacitance is large each time on average, it is clear that the number of charge transfer times of each electrode that is fully charged once is small, and vice versa. During the process of touching or approaching a metal button on the touch panel, the charge transferred through the copper foil may be greater than the required charge of the unit capacitor, and a plurality of discharge circuits corresponding to the number of unit capacitors may be disposed. When it is detected that the voltage across the unit capacitor reaches the reference voltage, the discharge circuit initiates discharge of the unit capacitor. Since the capacitance of the unit capacitor is small, it is also relatively easy to be quickly discharged by the discharge circuit, and thus the time required for discharge is small. Thereby, the accuracy of the entire touch recognition process can be ensured. After discharging the unit capacitor, the unit capacitor will be filled again by the charge transferred through the copper foil, and then will undergo another discharge, and the process continues until the finger touches or approaches the end of a metal button on the touch panel. In the actual implementation, when the voltage across the unit capacitor reaches the reference voltage, the count value included in the count signal outputted each time may be used as the charge sample value, or may be collected every predetermined period. The count value included in the count signal is used as the charge sample value. If the manner of collecting the charge sample value is performed every predetermined period, the predetermined period is the value of collecting the charge sample value The sampling period, the shorter the sampling period, the higher the accuracy of the touch recognition, but the amount of data that the processing chip needs to process is large, the burden is heavy, and the sampling period is too long, and it is difficult to achieve accurate touch recognition. Generally, The time interval of acquisition can be set between 1 and 100 milliseconds (ms), for example, 10 ms. The charge sample value can be obtained in the sampling period based on the number of charge transfer of each electrode (count value of the count signal) when the voltage corresponding to the total amount of charge transferred on each electrode of the record reaches the reference voltage. It should be noted that, when the touch button structure faces a touch or a proximity touch, the speed at which the unit capacitor completes one charge and discharge process is very fast, and if the method of collecting the charge sample value every predetermined period is adopted, usually in sampling During the period, the unit capacitance will complete the process of multiple charge and discharge, that is, the voltage of the unit capacitor will be detected multiple times to reach the reference voltage. Therefore, in the sampling period, a plurality of charges transferred on each electrode are generally recorded. When the voltage corresponding to the voltage reaches the reference voltage, the count value of the number of charge transfer times of each electrode, when the specific sampling is performed, the plurality of the recorded count values may be taken as an arithmetic mean value, and the sample may be taken as the charge sample value. As the charge sample value, the most recent count value may be used as the charge sample value by taking the arithmetic mean value of the largest count value and the smallest count value among the plurality of the count values recorded. After sampling the charge sample value, step S102 is performed to obtain a long-term average value (LTA, Long Term Average) of the charge sample value in the first preset time. In the specific implementation, the first preset time charge sample value The long-term average value can be obtained by cumulatively summing and calculating the average value of the plurality of charge sample values obtained in the first preset time or by weighted averaging.

Since the cause of the change in the charge in the charge accumulation region is not only that the user's finger touches the touch button structure, but in different environments, the aspects are complicated, and the capacitive touch device does not detect the total. It is related to the user touching the touch button structure, and the detected result should be the result of the entire environment change, including various feelings and factors, which need to be compensated to be able to detect the trigger of the touch-sensing event more accurately. The LTA value can be understood as a long-term average of the previously stable charge sample values, that is, the LTA value is calculated with the previous charge sample value as a reference, and the LTA indicates that the charge is sampled when the touch-sensitive event is not triggered. The long-term average of the sample values, since the sampling of the charge sample values is a continuous process, the long-term average is also constantly updated. When no condition is triggered, the charge sample value is ideally equal to the LTA value, but if the environment is unstable, the noise is large, and the electricity is large. The sample value will have slight fluctuations around the LTA value. The following is an example of step S102: if the count value included in the count signal outputted each time is used as the charge sample value, if the first preset time is set to 1 second (s), it is assumed that the total value is within After outputting 500 count signals, a total of 500 charge sample values can be collected, and the 500 data are added and summed, and the arithmetic mean is calculated. The calculated arithmetic mean is the charge sample value in Is. Long-term average value; if the method of collecting the charge sample value is used every predetermined period, it is assumed that the preset period for sampling is set to 10 ms, that is, data of a charge sample value can be collected every 10 ms, when the first When a preset time is set to Is, a total of 100 charge sample values can be collected in Is, the 100 data are added and summed, and the arithmetic mean is calculated, and the calculated arithmetic mean is Is the long-term average of the charge sample values within Is. In other embodiments, it is also conceivable to set a larger weight for the sampled sample values in the preset periods that are closer to the current time, and to sample the preset periods that are farther from the current time. The charge sample value sets a smaller weight, that is, the last long-term average value is the average value of the charge sample values over a period of time after the weight is set, instead of calculating the arithmetic mean value of the charge sample values for a period of time. Can be more in line with the current environment. After obtaining the long-term average value of the charge sample value in the first preset time, and collecting the current charge sample value, performing step S103, the difference between the long-term average value and the currently obtained charge sample value is greater than or equal to A button that touches the sensing threshold is recognized as a touched button. Specifically, the long-term average value of the charge sample values in the first preset time is subtracted from the difference between the charge sample values sampled when the touch button structure faces a touch or a proximity touch, and a preset touch sense The threshold is compared, where the touch sensing threshold is a threshold value that defines whether the metal button in the touch button structure is touched, and the difference between the long-term average value and the current charge sample value corresponding to an electrode is greater than or equal to the threshold value. When the touch sensing threshold is touched, it can be determined that the button corresponding to the electrode is touched. As mentioned above, when the conditions of the collected charge samples are ideally equal to the LTA value without triggering any conditions, the difference between the long-term average value and the currently obtained charge sample value should be zero, but the actual situation Because the environment is unstable and the noise interference is large, the charge sample value may have slight fluctuations near the LTA value, but generally does not exceed the set touch sensing threshold, only when the user's finger touches the touch button. When the metal button in the structure is sharply increased, the current charge sample value obtained becomes smaller, that is, when the charge sample value deviates from the LTA value to a certain extent, It is determined that the trigger of the touch sensing event, the button corresponding to the electrode that triggers the touch sensing event is the touched button, thereby greatly improving the accuracy of the button recognition.

 In addition, the touch sensing threshold is set according to actual conditions, and can generally be set to a fixed value, for example, the touch sensing threshold is set to 30. Of course, the touch sensing threshold may also be the average of the plurality of charge sample values sampled over a period of time. If the touch sensing threshold is set to a fixed value, it is difficult to adapt to changes in the surrounding environment. In this embodiment, the touch sensing threshold can be set according to the LTA value, for example, setting the touch sensing threshold to 1/16 LTA. The LTA mentioned above is an overall estimate of the value of the charge sample in the previous time environment, so the LTA is a dynamic change value. When the touch recognition device of the touch recognition method of the embodiment is turned on, the detection is performed, and the LTA value is automatically adjusted by using the environment, thereby adjusting the touch sensing threshold, so the touch sensing threshold is also dynamic, so that the self is achieved. Adapt to the purpose of adjusting the touch sensing threshold.

As mentioned before, the LTA is a long-term average value of the sampled charge samples when the touch-sensing event is not triggered. Since the sampling of the charge sample values is a continuous process, the long-term average value is also continuously updated. However, after the touched key is recognized, that is, after the touch sensing event is triggered, the updating of the long-term average value of the charge sample values in the first preset time period is stopped until the long-term average value and the currently obtained electric charge are stopped. The difference between the sample values is less than the touch sensing threshold, indicating that the touch sensing event ends, and then the LTA value is updated. Based on the above touch recognition method, the embodiment further provides a touch recognition device. FIG. 5 is a schematic structural diagram of a touch recognition apparatus according to Embodiment 1. As shown in FIG. 5, the touch recognition apparatus 10 includes: a sampling unit 101, wherein the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charges transferred on each electrode of the touch button structure reaches a reference voltage is used as the electrode Corresponding keys are charged sample values when the touch key structure faces a touch or proximity touch; the averaging unit 102 is adapted to obtain a long-term average value of the charge sample values in the first preset time; the identification unit 103, and the sampling The unit 101 and the averaging unit 102 are connected to each other, and are adapted to recognize a button whose difference between the long-term average value and the currently obtained charge sample value is greater than or equal to a touch-sensing threshold as a touched button. In this embodiment, the touch sensing threshold is associated with a long-term average value of the charge sample values in the first preset time. The touch button structure includes: a touch panel and a detecting board insulated from the touch panel, wherein the touch panel is configured There are a plurality of metal buttons, and the detecting board has a plurality of electrodes respectively corresponding to the metal buttons. For details of the touch button structure, refer to FIG. 2 and FIG. 3 and related descriptions in the touch recognition method.

 In a specific implementation, the sampling unit 101 may include: a plurality of unit capacitors respectively connected to respective electrodes in the touch button structure; a plurality of voltage detecting units respectively connected to the plurality of unit capacitors to detect corresponding unit capacitors Voltage at both ends, and when the voltage across the unit capacitor reaches the reference voltage, outputting a counting signal, the counting signal includes the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charges transferred on each electrode reaches the reference voltage The counting unit is connected to the plurality of voltage detecting units, and is adapted to collect the count value included in the counting signal output by each voltage detecting unit as the charge sample value.

 In a specific implementation, the averaging unit 102 may obtain the first pre-determined manner by accumulating and summing a plurality of charge sample values obtained in a first preset time, or calculating the average value thereof. Set the long-term average of the charge sample values over time.

In addition, the touch recognition device further includes an update stop unit 104, and is connected to the identification unit 103 and the averaging unit 102, and is adapted to stop the averaging unit 102 to the first preset time after the touched button is recognized. The update of the long-term average of the internal charge sample values until the identification unit 103 recognizes that the difference between the long-term average and the currently obtained charge sample value is less than the touch-sensing threshold. For the specific implementation of the touch recognition device in this embodiment, reference may be made to the implementation of the above touch recognition method, and details are not described herein again. Based on the above touch recognition method, the embodiment further provides a method for controlling a space mouse. The space mouse has the touch button structure described in this embodiment. The method for controlling the space mouse includes: after the touch recognition method according to the embodiment identifies the touched button, generating a corresponding first control signal according to the recognition result to control the operation of the space mouse, and implementing the touched button Preset function. Each of the buttons on the touch button structure has a corresponding preset function. When a button is touched, a preset function corresponding to the button is triggered, and the triggering of the preset function is specifically to generate a first control signal. Formally implemented by transmitting the first control signal to an operation object of the space mouse, the operation object having a receiving device for the first control signal, when the receiving device receives the first control After the signal, corresponding operations may be performed according to the first control signal (different control signals perform different operations), thereby implementing preset functions corresponding to the respective buttons. It should be noted that there are some differences between the preset functions set by the space mouse, for example: When the space mouse is operated as a TV, the preset functions include TV on/off, increasing the volume, Reduce volume, channel input, switch to previous channel, switch to next channel, etc.; when the space mouse is operated by computer (computer), preset functions include icon or menu selection, page turning, input letters, etc. When the space mouse is operated as a DVD player, the preset functions include DVD on/off, broadcast/pause, volume up, volume down, menu selection, and the like. Since the touch recognition method of the embodiment can ensure the accuracy of the touch recognition, the control method of the space mouse can improve the user's operation experience for the space mouse.

In this embodiment, the touch function of a certain button may be preset to start/close the space mouse, and when the button is touched, the space mouse may be controlled to be turned on or off; otherwise, if the button is not touched, The space mouse will not be activated or turned off. In this way, in actual operation, the user can start or close the space mouse only by touching the button, and touching other buttons does not interfere with the start/stop of the space mouse, thereby effectively avoiding the user in practical applications. The resulting misoperation, and effectively reduce the energy loss caused by misoperation. In this embodiment, the preset function of the touched button includes a confirmation function for the selected position of the mouse pointer controlled by the space mouse. If the touched button is recognized as a button for implementing the confirmation function, the second pre-delay is delayed. The time is set to generate the first control signal. Space mouse usually has the basic function of the mouse, that is, controls the movement of the mouse pointer to select the execution target, and outputs the confirmed first control signal after the execution target is selected to determine the execution of the selected target. The control of the mouse pointer by the space mouse is specifically to set the inertial device (such as a gyro sensor, a gravity acceleration sensor, etc.) in the space mouse, and use the inertial device measurement technology to track the air movement posture of the space mouse, and obtain the space. The spatial coordinate of the mouse or its variation, and the obtained spatial coordinate or its variation is converted into the coordinates of the mouse pointer or its variation, and the coordinates of the mouse pointer or its variation is output to control the movement of the mouse pointer. The space coordinate of the space mouse or the amount of change thereof is obtained by processing the data output by the inertial device. After the user uses the space mouse to control the mouse pointer to move to the target position, to confirm the selected position of the mouse pointer to execute the corresponding application, only need to touch the button with the confirmation function of the selected position of the mouse pointer of the space mouse control However, when the user touches the button with the confirmation function, on the one hand, the user's hand has a certain amount of jitter. On the other hand, when the button is touched, a sinking force is formed, which may cause the mouse pointer to deviate from the selected target position. , Causes the validation function to fail. Therefore, in order to avoid the jitter of the mouse pointer when the confirmation function is implemented, when it is recognized that the preset function of the touched button is the confirmation function of the selected position of the mouse pointer controlled by the space mouse, the second preset time is delayed to generate the The first control signal. Thus, even when the button with the preset function being the confirmation function is touched, the mouse pointer is shaken, and the first control signal having the confirmation function is temporarily not generated and output, and after the user adjusts, the mouse pointer is moved to an accurate position. In the position, the first control signal is generated and outputted, and the confirmation function can be accurately implemented. The second preset time is set according to the actual situation. Generally, the time required for the user to make adjustments can be considered. Since the jitter of the mouse pointer is not large, the time required for the adjustment is generally very short.

 As described above, when the button having the confirmation function is touched, the first control signal is generated by delaying for a period of time (second preset time), so that the user can adjust the position of the mouse pointer to avoid the confirmation function caused by the mouse pointer shaking. Failure. However, the time required for the user to adjust is more difficult to determine in the actual situation, so that the second preset time is also difficult to set. If the setting is too short, the position of the mouse pointer cannot be adjusted in time. If the setting is too long, the delay may be caused. This can seriously affect the user experience. In order to solve this problem, in the embodiment, the control method of the space mouse further includes: shielding, during the second preset time of delay, processing of output data of the inertial device included in the space mouse, the inertia The data output by the device is used to implement spatial positioning of the space mouse to control the movement of the mouse pointer. Since the movement of the mouse pointer depends on the data output by the inertial device included in the space mouse lock, if the touched button is recognized as the button having the confirmation function, the time before the output of the control signal is delayed. During the second preset time, the processing chip in the shielded space mouse processes the output data of the inertial device, and the mouse pointer will not move when the button is touched, thereby effectively preventing the mouse pointer from being shaken. . At this time, since there is no adjustment by the user, the setting of the second preset time does not have the consideration of adjusting the time required by the user, and only needs to consider identifying the touched button and then issuing a shield to the inertial device. The time at which the data is processed for processing is sufficient, and the time is extremely short and easy to determine. Therefore, during the second preset time of the delay, by shielding the processing of the output data of the inertial device included in the space mouse, the shaking of the mouse pointer controlled by the space mouse is further effectively prevented, and the user operation experience is improved.

Based on the above touch recognition device, corresponding to the above control method of the space mouse, the embodiment further provides a space mouse. FIG. 6 is a schematic structural diagram of a space mouse according to Embodiment 1 of the present invention. Referring to FIG. 6, the space mouse includes: a control unit 30 and the touch recognition device 10 described above, and a touch button Structure 20, the control unit 30 is adapted to generate a corresponding first control signal according to the recognition result to control the operation of the space mouse after the touch recognition device 10 recognizes the touched key, to implement the touched The preset function of the button.

In this embodiment, the preset function of the touched button includes a confirmation function of the selected position of the mouse pointer controlled by the space mouse, and the control unit 30 includes a first delay unit 30a, which is suitable for the touch recognition device. The touched button recognized by the recognition unit of 10 is a button for realizing the confirmation function, and the first control signal is generated by delaying a second preset time. In addition, the control unit 30 further includes a first shielding unit 30b connected to the first delay unit 30a, and is adapted to shield the inertial device included in the space mouse during the second preset time of delay Processing of output data, the data output by the inertial device is used to implement spatial positioning of the space mouse to control movement of the mouse pointer. It should be noted that, in this embodiment, the touch recognition device is applied to a space mouse, and the space mouse can operate as a remote controller, for example, a television, a computer (computer), a DVD, etc., in other embodiments. The touch recognition device can also be applied to other products (the product has a touch button structure and a control unit), for example, a control panel (non-remote control) that can be disposed on an electronic device such as a television or a DVD. For the specific implementation of the space mouse in this embodiment, reference may be made to the implementation of the control method of the space mouse described above, and details are not described herein again. The second embodiment differs from the first embodiment in that the touch button structure, the space mouse, and the control method thereof are different. As described in the first embodiment, after the touched key is recognized by the touch recognition method, a corresponding first control signal is generated according to the recognition result to control the operation of the space mouse, and the touched key is implemented. Set the function. The spatial position of the space mouse is realized by the data output by the inertial device included in the space mouse, so that the movement of the mouse pointer can be controlled, and the preset function of the touched button is specifically a mouse pointer controlled by the space mouse. When the confirmation function of the position is selected, the mouse pointer controlled by the space mouse can be effectively avoided by delaying the generation of the first control signal and shielding the processing chip of the inertia device from the processing chip in the space mouse within a delay time. Jitter to improve the user experience. Because space mouse usually does not need to use the control mouse pointer to move The function of the processing chip is very power-consuming for processing the output data of the inertial device. To save energy, a button can be specifically set, and the preset function of the button is to trigger or turn off the mouse pointer controlled by the space mouse. The function of moving, so you can control the movement of the mouse pointer as needed. However, the function of controlling the movement of the mouse pointer and the confirmation function of the selected position of the mouse pointer need to be implemented by two buttons respectively, resulting in a user's poor experience in operating the space mouse, and it is easy to forget to turn off the function of controlling the movement of the mouse pointer, thereby causing Waste of electrical energy. In this embodiment, the function of controlling the movement of the mouse pointer and the confirmation function of the selected position of the mouse pointer are implemented by a button. When the user touches the button, the function of the space mouse to control the movement of the mouse pointer is activated, when the user presses When the button is pressed, the function of confirming the selected position of the mouse pointer can be realized. When the user's finger leaves the button, the function of controlling the movement of the mouse pointer by the space mouse is automatically turned off. In order to achieve the above object, the touch button structure provided in this embodiment is based on the touch button structure provided in the first embodiment, and a film button is also added under the metal button. FIG. 7 is a schematic diagram of a structure of a touch button provided by Embodiment 2 of the present invention. The touch button structure shown in FIG. 7 includes the touch panel 201 of the first embodiment and the detecting board 203 opposite to the touch panel 201. The touch panel 201 includes a board body 201a and a plurality of metal buttons 1~ 5, isolating the metal layer and the insulating layer 202 of the gold plate body 201a, the detecting plate 203 has a plurality of electrodes A to E corresponding to the metal buttons, the plurality of metal buttons and the area between the corresponding electrodes The membrane capacitor 204 is further configured to include a membrane button 204 located below the metal button 5. The membrane button 204 is located on the surface of the detection panel 203, corresponding to the metal button 5, and the preset function of the metal button 5 is triggered. The space mouse controls the movement of the mouse pointer. In the embodiment, the electrode E is a square or rectangular copper foil having an opening at the center, and the film button 204 is specifically a metal dome or a metal dome (metaldome or polydome) protruding from the central opening of the electrode E. In other embodiments, the electrode E may also have other shapes, such as a circular shape, an elliptical shape, or the like. The detection board 203 is usually a printed circuit board (PCB) or a flexible printed circuit (FPC) board, which carries the membrane button 204, the electrodes A to E, and an interface connected to the processing chip. When the metal button is touched, a first control signal corresponding to the button is generated, and the first control signal is transmitted to the processing chip through the interface to control the operation of the space mouse, and the pre-touch of the touch button is implemented. Set the function. The metal button 5 can be pressed, and when the metal button 5 is pressed, the film button 204 can also be pressed. When the membrane button 204 is pressed, a corresponding second control signal is generated, which can also be transmitted to the processing chip through a corresponding interface to control the operation of the space mouse to realize the pressed membrane button. Preset function. The bottom of the metal button 5 shown in FIG. 7 has a protrusion, and the film button 204 can be pressed when the metal button 5 is pressed. In other embodiments, the bottom of the metal button may also have no protrusion, and the metal button is pressed. The film button is then pressed by the deformation it produces. The principle and function of the membrane button are well known to those skilled in the art and will not be described herein. It should be noted that, in this embodiment, the thin film button is disposed only under one metal button of the touch button structure (taking the metal button 5 as an example), and the preset function that can be implemented after the metal button is touched is triggered. The space mouse controls the movement of the mouse pointer. In other embodiments, the membrane button may also be disposed under each metal button, and the different buttons may be triggered by touching the metal button and pressing the membrane button corresponding to the metal button (by pressing the metal button). Features.

 In the specific implementation, when the metal button 5 is touched, the function of moving the mouse pointer controlled by the space mouse is triggered, and the user can control the movement of the mouse pointer of the space mouse by touching the metal button 5, and move to preparation. After the selected position, the metal button 5 can be pressed, so that the membrane button 204 is pressed, and when the membrane button 204 is pressed, a corresponding second control signal is generated to implement the space mouse control. The mouse pointer selects the confirmation function for the location.

 Similar to the first embodiment, the control method of the space mouse in the embodiment further includes: delaying the third preset time to generate the second control signal, and shielding the space mouse in the delayed third preset time The processing of the inertial device output data is included, and the data output by the inertial device is used to implement spatial positioning of the space mouse to control movement of the mouse pointer. The third preset time is similar to the second preset time in the first embodiment, and may be set according to actual conditions. For example, the third preset time may be set to be the second preset. The time is the same. For the reason and effect of delaying the generation of the second control signal and masking the processing of the output data of the inertial device by the processing chip in the space mouse within a delay time, reference may be made to the related description in the first embodiment.

Based on the above control method of the space mouse, the embodiment further provides a space mouse. FIG. 8 is a schematic structural diagram of a space mouse according to Embodiment 2 of the present invention. As shown in FIG. 8, the space mouse includes a control unit 30, and a touch recognition device 10 and a touch button structure 20. The control unit 30 is adapted to be used after the touch recognition device 10 recognizes a touched button. The recognition result produces a corresponding first control A signal is generated to control the operation of the space mouse to implement a preset function of the touched button. In this embodiment, if the preset function of the touched button is a function of triggering the movement of the mouse pointer controlled by the space mouse, the detecting board of the touch button structure 20 ′ further includes the touched button And corresponding to the membrane button, the control unit 30 is further adapted to generate a corresponding second control signal when the membrane button is pressed to implement a confirmation function of the selected position of the mouse pointer controlled by the space mouse. In a specific implementation, the control unit 30 includes a second delay unit 30a, and is adapted to generate the second control signal by delaying a third preset time. In addition, the control unit 30 may further include a second shielding unit 30b connected to the second delay unit 30a, and configured to shield the space included in the space mouse during a third preset time delay. The processing of the inertial device output data, the data output by the inertial device is used to implement spatial positioning of the space mouse to control the movement of the mouse pointer. For the specific implementation of the space mouse in this embodiment, reference may be made to the control method of the space mouse and the implementation of the space mouse in the first embodiment, and details are not described herein. The touch button structure described in the first embodiment is a pressureless (zero pressure) touch button structure. Referring to FIG. 3, after the user's finger touches the metal button on the touch panel 201, the user does not need to press the button. The metal button can detect the touch behavior more accurately. Even if the metal button has a slight deformation under the pressure, the touch behavior is not detected according to the deformation of the metal button under the applied pressure and pressure. The specific touch recognition process can be Refer to the related description in the first embodiment. In the touch button structure described in the first embodiment, since the metal button included in the touch panel is separated from the board by an insulating layer, the touched metal button can be more accurately recognized. However, if the touch panel is a metal button and The all-metal touch panel integrated with the board body, after touching a metal button, part of the charge is also transferred to other buttons, thereby affecting the accuracy of the touched button recognition. Therefore, in this embodiment, the touch button structure is a pressure touch button structure. Figure 9 is a schematic diagram of touch recognition of a pressurized touch button structure. The metal button in the touch button structure of the embodiment is slightly deformed after being pressed by the user's finger, as shown by the third metal button from left to right in FIG. 9, the embodiment is based on Under the action of pressure, the change of the capacitance caused by the deformation of the metal button realizes touch recognition. The touch button structure of this embodiment includes: a touch panel 801 and the touch panel 801 The combined detection board 803 is located on the insulating layer 802 between the touch panel 801 and the detection board 803. The touch panel 801 can be an all-metal panel, and its shape can be designed according to actual needs, usually a square panel. The touch panel 801 may be an integrally formed metal panel. The touch panel 801 includes: a first surface 801a provided with a plurality of metal buttons 801c and a second surface 801b opposite to the first surface 801a, the second surface 801b having a plurality of grooves 801d, the groove 801d of the second surface 801b corresponds to the metal button 801c of the first surface 801a, for example, five metal buttons 801c are illustrated, and correspondingly, there are five grooves 801d. The metal button 801c on the touch panel 801 is a touch button, that is, the metal button region of the first surface 801a and other regions are substantially on the same plane, and only need to touch the metal button region (or apply light pressure on the metal button). That is, the button trigger can be detected to implement the corresponding button function. The detecting plate 803 includes a plurality of electrodes 804, and the plurality of electrodes 804 respectively correspond to the metal buttons 801c of the first surface 801a. For example, five metal buttons 801c are illustrated, and five electrodes 804 are also provided, corresponding to the metal button 801c. . The electrode 804 is a conductive material that is substantially the same shape and size as the metal button region of the first surface 801a.

 Specifically, for the capacitive button detection mode, the potential of the button on the button panel needs to be fixed. In this embodiment, since the touch panel 801 is an all-metal button panel, the touch panel 801 can be grounded, such that the touch panel 801 The metal button has a fixed potential, ie a zero potential. The capacitance C between the metal button 801c on the touch panel 801 and the electrode 804 on the detecting board 803 can be expressed by the following formula:

C = s- ^S

d where ε is the dielectric constant, relating to the medium between the metal button 801c and the electrode 804, S is the facing area between the metal button 801c and the electrode 804, and d is the distance between the metal button 801c and the electrode 804. It is assumed that when the metal button 801c is not touched, the distance between the metal button 801c and the electrode 804 is dl as shown in FIG. 9 (as indicated by the fourth metal button from left to right), when the metal button 801c is touched As shown in FIG. 9, the touch panel 801 is slightly deformed at the touched button position (as indicated by the third metal button from left to right), and the distance between the metal button 801c and the electrode 804 is reduced to d2. Therefore, the capacitance C between the metal button 801c and the electrode 804 is increased, and the amount of charge transfer due to the increase in the capacitance C is escaping from the human body due to the charge being touched after the metal button is touched in the first embodiment. Making electricity occur in the charge accumulation region of the electrode corresponding to the metal button The amount of charge change, and thus the amount of charge transferred to the unit capacitance, is of different order of magnitude, that is, relative to the first embodiment, the amount of charge transferred after touching the metal button in this embodiment is larger, and the charge sample value thus collected It becomes smaller, so that it is more accurate to determine that the charge sample values collected in a plurality of predetermined periods are smaller than the touch sensing threshold. Therefore, the recognition of the touched keys in this embodiment is more touched than in the first embodiment. The recognition of the buttons is more accurate.

 Moreover, even if the touch panel is an all-metal touch panel in which the metal button and the board body are integrally formed, since the amount of charge transfer caused by the touched button is much higher than the amount of charge transfer caused by the untouched button, it is only necessary to set the appropriate amount. The touch-sensing threshold is a good way to avoid false triggering.

 Of course, since the capacitance C between the metal button and the electrode is increased, accordingly, the voltage on the electrode is increased, whereby the button corresponding to the electrode whose change in voltage is detected can also be recognized as the touched button.

 It should be noted that the touch button structure shown in FIG. 3 can also identify the touched button by using the method described in this embodiment, that is, by touching the metal button, the metal button is slightly deformed under the action of pressure, so that The capacitance C increases, the amount of transferred charge increases correspondingly, and the collected charge sample value becomes smaller, and the button of the first predetermined number of predetermined cycles that is less than the touch sensing threshold is recognized as being Touching the button makes the recognition of the touched button more accurate. In summary, the touch recognition method and apparatus, the space mouse and the control method thereof provided by the embodiments of the present invention have at least the following beneficial effects:

When the touch key structure faces a touch or a proximity touch, the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charge transferred on each electrode of the touch key structure reaches the reference voltage is used as the button corresponding to the electrode The touch key structure faces the charge sample value when the touch or the proximity touch is performed, and obtains a long-term average value of the charge sample value in the first preset time, and the difference between the long-term average value and the currently obtained charge sample value is greater than or equal to the touch sensing threshold. The keys are recognized as touched keys, thereby improving the accuracy of touch recognition. After the touched button is recognized, the corresponding first control signal can be generated according to the recognition result to accurately control the operation of the space mouse, and the preset function of the touched button is implemented, thereby improving the user's operation experience on the space mouse. If the preset function of the touched button includes the confirmation function of the selected position of the mouse pointer controlled by the space mouse, delaying the second preset time when the touched button is recognized as the button for implementing the confirming function The first control signal can prevent the jitter of the mouse pointer when the confirmation function is implemented, and improve the user operation experience.

 In addition, during the second preset time of the delay, by shielding the processing of the output data of the inertial device included in the space mouse, the shaking of the mouse pointer controlled by the space mouse is further prevented, and the user operation experience is improved. If the preset function of the touched button is a function of triggering movement of the mouse pointer controlled by the space mouse, and the detection panel of the touch button structure further includes a membrane button corresponding to the touched button, when When the membrane button is pressed, a corresponding second control signal is generated to implement a confirmation function of the selected position of the mouse pointer controlled by the space mouse, and the mouse controlled by the space mouse can also be prevented by the delay and shielding manner. The jitter of the pointer improves the user experience. The present invention has been disclosed in the preferred embodiments as described above, but it is not intended to limit the invention, and the present invention may be utilized by the method and technical contents disclosed above without departing from the spirit and scope of the invention. The technical solutions make possible changes and modifications, and therefore, the scope of protection of the technical solutions of the present invention is not deviated from the present invention.

Claims

Rights request

 A touch recognition method, comprising:

 The number of charge transfer times of each electrode when the voltage corresponding to the total amount of charge transferred on each electrode of the touch button structure reaches the reference voltage is used as a charge sample value of the button corresponding to the electrode when the touch button structure faces a touch or a proximity touch;

 Obtaining a long-term average value of the charge sample values in the first preset time;

 Identifying a button having a difference between the long-term average value and a currently obtained charge sample value greater than or equal to a touch-sensing threshold as a touched button;

 The touch button structure includes: a touch panel and a detecting board insulated from the touch panel, wherein the touch panel is provided with a plurality of metal buttons, and the detecting board has a plurality of electrodes respectively corresponding to the metal buttons .

 The touch recognition method according to claim 1, wherein the touch sensing threshold is associated with a long-term average value of the charge sample values in the first preset time.

 The touch recognition method according to claim 1, wherein, after the touched key is recognized, the updating of the long-term average value of the charge sample values in the first preset time is stopped until the long-term average The difference between the value and the currently obtained charge sample value is less than the touch sensing threshold.

 The touch recognition method according to claim 1, wherein the long-term average value of the charge sample values in the first preset time is obtained by using a plurality of charge sample values obtained in the first preset time. The manner in which the summation is summed and the average value is calculated is obtained in a weighted average manner.

 A method for controlling a space mouse, comprising: after identifying a touched key by the touch recognition method according to any one of claims 1 to 4, generating a corresponding first control signal according to the recognition result to control the The operation of the space mouse implements the preset function of the touched button.

 The method for controlling a space mouse according to claim 5, wherein the preset function of the touched button comprises a confirmation function of a selected position of a mouse pointer controlled by the space mouse, and if the touched button is recognized To implement the button of the confirmation function, the first control signal is generated by delaying the second preset time.

The method for controlling a space mouse according to claim 6, further comprising masking processing of output data of the inertial device included in the space mouse during the second preset time of the delay, the inertia The data output by the device is used to implement spatial positioning of the space mouse to control the mouse The movement of the pointer.

 The method for controlling a space mouse according to claim 5, wherein the preset function of the touched button is a function of triggering movement of a mouse pointer controlled by the space mouse, and the detection of the touch button structure The board further includes a membrane button corresponding to the touched button, and when the membrane button is pressed, a corresponding second control signal is generated to implement a confirmation function of the selected position of the mouse pointer controlled by the space mouse.

 The method of controlling a space mouse according to claim 8, further comprising generating the second control signal by delaying a third preset time.

 10. The method of controlling a space mouse according to claim 9, further comprising masking processing of output data of the inertial device included in the space mouse during a third predetermined time delay, the inertia The data output by the device is used to implement spatial positioning of the space mouse to control the movement of the mouse pointer.

 A touch recognition device, comprising:

 a sampling unit, wherein when the voltage corresponding to the total amount of charges transferred on each electrode of the touch button structure reaches a reference voltage, the number of charge transfer times of each electrode is used as a button corresponding to the electrode when the touch button structure faces a touch or a proximity touch Charge sample value;

 Mean unit, adapted to obtain a long-term average value of the charge sample values in the first preset time; and an identification unit, wherein the difference between the long-term average value and the currently obtained charge sample value is greater than or equal to a touch-sensing threshold Recognized as a touched button;

 The touch button structure includes: a touch panel and a detecting board insulated from the touch panel, wherein the touch panel is provided with a plurality of metal buttons, and the detecting board has a plurality of electrodes respectively corresponding to the metal buttons .

 The touch recognition device according to claim 11, wherein the sampling unit comprises:

 a plurality of unit capacitors respectively connected to respective electrodes in the touch button structure;

 a plurality of voltage detecting units respectively connected to the plurality of unit capacitors, detecting a voltage across the corresponding unit capacitor, and outputting a counting signal when the voltage across the unit capacitor reaches a reference voltage, the counting signal including a count value of the number of charge transfer times of each electrode when the voltage corresponding to the total amount of charge transferred on the electrode reaches the reference voltage;

The collecting unit is connected to a plurality of voltage detecting units, and is adapted to collect the counts output by the respective voltage detecting units The count value included in the signal is taken as the charge sample value.

 The touch recognition device according to claim 11, wherein the touch sensing threshold is associated with a long-term average value of the charge sample values in the first preset time.

 The touch recognition device according to claim 13, further comprising an update stop unit, configured to stop the mean value of the charge sample value in the first preset time after the touched key is recognized Updating of the long-term average until the identification unit recognizes that the difference between the long-term average and the currently obtained charge sample value is less than the touch-sensing threshold.

 The touch recognition device according to claim 11, wherein the mean value unit calculates and calculates an average value of the plurality of charge sample values obtained in the first preset time or A long-term average of the charge sample values in the first predetermined time period is obtained in a weighted average manner.

 A space mouse, comprising: a control unit and the touch recognition device according to any one of claims 11 to 15, a touch button structure, wherein the control unit is adapted to recognize that the touch recognition device is After the button is touched, a corresponding first control signal is generated according to the recognition result to control the operation of the space mouse, and the preset function of the touched button is implemented.

 The space mouse according to claim 16, wherein the preset function of the touched button comprises a confirmation function of a selected position of a mouse pointer controlled by the space mouse, and the control unit comprises a first delay unit The first control signal is generated by delaying the second preset time when the touched button recognized by the identification unit is a button for implementing the confirmation function.

 The space mouse according to claim 17, wherein the control unit further comprises a first shielding unit adapted to block the inclusion of the space mouse during the second preset time of delay The processing of the inertial device output data, the data output by the inertial device is used to implement spatial positioning of the space mouse to control the movement of the mouse pointer.

 The space mouse according to claim 16, wherein the preset function of the touched button is a function of triggering movement of a mouse pointer controlled by the space mouse, and the detection panel of the touch button structure is further Included with the membrane button corresponding to the touched button, the control unit is further adapted to generate a corresponding second control signal when the membrane button is pressed to implement a mouse pointer selected position of the space mouse Confirm function.

20. The space mouse according to claim 19, wherein the control unit comprises a second delay unit adapted to delay the third predetermined time to generate the second control signal.

The space mouse according to claim 20, wherein the control unit further comprises a second shielding unit, configured to shield the inertial device included in the space mouse during a third preset time delay Processing of output data, the data output by the inertial device is used to implement spatial positioning of the space mouse to control movement of the mouse pointer.