TWI715061B - A scanning method for keys, a scanning method for keys scanning circuit, and an input device - Google Patents

Abstract

A scanning method for keys, a scanning method for keys scanning circuit, and an input device are provided. The scanning method for keys includes: executing a first scanning process, including triggering a first main scanning line, and reading a plurality of sensing signal lines to determine a plurality of the plurality of keys that are triggered in the first keys group. Then performing a second scanning process, including triggering one of the plurality of sub-scanning lines, and reading the plurality of sensing signal lines to determine a portion of the plurality of keys that are triggered in the second keys group. Wherein the first scanning program and the second scanning program are alternately executed, and each sub-scanning line is triggered at least once.

Description

Key scanning method, scanning method and input device used in key scanning circuit

The present invention relates to a key scanning, and in particular to a key scanning method that performs interspersed multiple scanning of key keys to shorten the scanning period, a scanning method used in a key scanning circuit, and an input device.

As the e-sports culture becomes more and more popular, consumers gradually choose to buy e-sports products for work or games. The e-sports industry not only drives the trend of digital competitions, but also drives the advancement of hardware. For gaming players or keyboard enthusiasts, a mechanical keyboard that responds quickly to keystrokes and is durable and reliable even after a large number of hits is absolutely indispensable. In fact, e-sports players usually only use specific keys on the keyboard to play related e-sports games. Currently, most of the keyboards dedicated to gaming use the mechanical structure or material of the keys to shorten the response time of the overall keys. However, it is rare to improve the button scanning method to shorten the response time of a specific button. Therefore, how to provide a way to improve the scanning of specific keys so that the scanning speed of specific keys can be greatly increased will be the focus of this case and the focus of solution.

In view of this, an embodiment of the present invention provides a key scanning method, which is suitable for an input device with multiple keys. A part of the keys forms a first key group, and another part of the keys forms a first key group. Two key sets, and the input device further has a plurality of scan lines for scanning the plurality of keys and a plurality of sensing signal lines corresponding to the plurality of keys, and the plurality of scan lines includes a first main scan line And multiple secondary scan lines, wherein the first main scan line is electrically connected to the first button group, and the multiple secondary scan lines are electrically connected to the second button group, and the button scanning method includes : Execute a first scan mode, the first scan mode includes: execute a first scan program, the first scan program includes triggering the first main scan line, and reading the electrical signals of the plurality of sensing signal lines , To determine whether a button in the first button group is triggered; and execute a second scan program, the second scan program is to trigger at least one of the plurality of secondary scan lines, and read the plurality of The electrical signal of a sensing signal line is used to determine whether a button in the second button group is triggered; wherein, the first scan program and the second scan program are executed alternately, and each scan line is at least Is triggered once.

The embodiment of the present invention further provides a scanning method used in a key scanning circuit, the key scanning circuit can scan a first key group and a second key group, the first key group includes X priority keys, the second key The group includes Y secondary keys, and the key scanning circuit includes M main scanning lines Sa(1) to Sa(M), N secondary scanning lines Sb(1) to Sb(N), and multiple sensing signal lines, Wherein X, Y, M, N are positive integers, the M main scan lines Sa(1) to Sa(M) are electrically connected to the X priority buttons, and the N sub scan lines Sb(1) Sb(N) is electrically connected to the Y secondary keys, and the scanning method includes the following steps: step (1), start a scanning loop, and set the initial value of the main scanning number j to 0; step (2a) , Determine whether the main scan times j is equal to the main scan preset upper limit Jmax, where Jmax is a positive integer, if yes, then execute step (3), if not, execute step (2b); step (2b), take turns Trigger each of the M main scan lines Sa(1) to Sa(M), read the electrical signals of the multiple sensing signal lines, to detect whether any of the X priority keys is triggered Step (2c), increase the value of the main scan times j, where j = j + 1, and go back to step (2a); Step (3), trigger the N secondary scan lines Sb(1) to In Sb(N), P secondary scan lines read the electrical signals of the plurality of sensing signal lines, wherein the P secondary scan lines are coupled to Q of the Y secondary keys The secondary key is used to detect whether a key is triggered in the Q secondary keys, where P <N and Q <Y, P and Q are positive integers; and step (4), in the scan loop , Determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered, if yes, end the scan loop, if not, set the main scan number j to 0, and return Go to step (2a).

An embodiment of the present invention provides an input device, including: a key scan circuit, the key scan circuit includes M main scan lines Sa(1) to Sa(M), N sub scan lines Sb(1) to Sb(N) And multiple sensing signal lines, where M and N are positive integers; the first button group, the first button group includes X priority buttons, and the M main scan lines Sa(1) to Sa(M) are electrical Connected to the X priority keys, where X is a positive integer; and a second key group, the second key group includes Y secondary keys, and the N secondary scan lines Sb(1) to Sb(N) Electrically connected to the Y secondary keys, where Y is a positive integer; wherein the key scanning circuit executes the following steps: step (1), start scanning loops, and set the initial value of the number of main scanning j to 0; step (2a), judge whether the main scan times j is equal to the main scan preset upper limit Jmax, where Jmax is a positive integer; if yes, execute step (3), if not, execute step (2b); step (2b) ), trigger each of the M main scan lines Sa(1) to Sa(M) in turn, and read the electrical signals of the multiple sensing signal lines to detect whether the X priority buttons A button is triggered; step (2c), increase the value of the main scan times j, where j = j + 1, and go back to step (2a); step (3), trigger the N secondary scan lines Sb in turn (1) P sub-scanning lines to Sb(N), and reading the electrical signals of the plurality of sensing signal lines, wherein the P sub-scanning lines are coupled to the Y sub-scanning lines The Q secondary buttons to be pressed to detect whether any of the Q secondary buttons are triggered, where P <N, and Q <Y, P and Q are positive integers; and step (4), In the scan loop, determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered, if not, set the main scan number j to 0, and return to step ( 2a) If yes, end the scanning loop.

An embodiment of the present invention further provides an input device, including: a key scanning circuit, the key scanning circuit includes N+1 scanning lines Row 0 ~ Row N, and a plurality of sensing signal lines, N is a positive integer; wherein the key The scanning circuit executes the following steps: step (1), start a scanning loop, determine whether the input device is currently in one of the first scanning mode, the second scanning mode or the third scanning mode, and perform step (2) accordingly One of step (3) or step (4); step (2), executed when the input device is in the first scan mode: the key scan circuit triggers the plurality of scan lines Row 0~Row N in turn One of them until each of the plurality of scan lines is triggered, and read the electrical signals of the plurality of sensing signal lines, detect whether a button in the input device is triggered, and end the Scan loop; step (3), executed when the input device is in the second scan mode: step (3a), the key scan circuit defines the scan line Row 0 as the first main scan line Sa(1), and The scan lines Row 1~Row N are defined as N secondary scan lines Sb(1) to Sb(N); step (3b), the key scan circuit is electrically connected to the first main scan line Sa(1) ) X1 buttons are defined as the first button group, and the remaining Y1 buttons that are not electrically connected to the first main scan line Sa(1) are defined as the second button group, and X1 and Y1 are positive integers; step (3c), set the initial value of the main scan number j to 0; step (3d), determine whether the main scan number j is equal to the preset upper limit Jmax, where the preset upper limit Jmax is a positive integer; if so, then Perform step (3g), if not, perform step (3e); step (3e), trigger the first main scan line Sa(1), read the electrical signals of the multiple sensing signal lines, and detect Measure whether any of the X1 priority buttons are triggered; step (3f), increase the value of the main scan times j, where j = j + 1, and go back to step (3d); step (3g), take turns Triggering P of the N secondary scan lines Sb(1) to Sb(N), wherein the P secondary scan lines are Q secondary buttons coupled to the Y1 secondary buttons, Read the electrical signals of the plurality of sensing signal lines, and detect whether any of the Q secondary keys is triggered, where P <N, Q <Y1, P and Q are positive integers; step (3i ), determine whether the N sub-scanning lines Sb(1) to Sb(N) have been triggered, if not, set the main scan times j to 0, and return to step (3d), if yes, then End the scan loop; step (4), when the input device is in the third scan mode, execute: step (4a), the key scan circuit defines scan lines Row 0 ~ Row 1 as two main scan lines Sa( 1)~Sa(2), and define scan lines Row 2~Row N as N-1 secondary scan lines Sb(1) to Sb(N-1); step (4b), the key scan circuit The X2 buttons that are electrically connected to the two main scan lines Sa(1)~Sa(2) are defined as the first button group, and are electrically connected to the two main scan lines Sa(1)~Sa (2) The remaining Y2 buttons are defined as the second button group, X2 and Y2 are positive integers; step (4c), set the initial value of the main scan number j to 0; step (4d), determine the main scan number j Whether it is equal to the preset upper limit value Jmax, where the preset upper limit value Jmax is a positive integer, if yes, execute step (4g), if not, execute step (4e); step (4e), trigger the two in turn The main scan lines Sa(1)~Sa(2), read the electrical signals of the multiple sensing signal lines, and detect whether any of the X2 priority keys is triggered; step (4f), add all The value of the number of main scans j, where j = j + 1, and return to step (4d); step (4g), trigger the N-1 secondary scan lines Sb(1) to Sb(N-1) in turn Among them, P, the P secondary scan lines are coupled to the Q secondary buttons of the Y2 secondary buttons, and read the electrical signals of the multiple sensing signal lines to detect all Whether any of the Q secondary keys are triggered, where P <N-1, Q <Y2, and P and Q are positive integers; and step (4h), determine the N-1 secondary scan lines Sb(1 ) To Sb(N-1) have been triggered, if not, set the main scan number j to 0, and return to step (4d), if yes, end the scan loop.

In the key scanning method, the scanning method used in the key scanning circuit, and the input device provided by the embodiments of the present invention, the key keys or common keys are scanned multiple times, and the key keys are scanned The line increases the number of scans to shorten the scan period of these key keys, so as to scan these key keys at a faster speed. In this way, the scanning time of these key keys is greatly shortened, and the reaction time of these key keys is accelerated.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented in accordance with the content of the specification, and to make the above and other objectives, features and advantages of the present invention more obvious and understandable. In the following, the preferred embodiments are cited in conjunction with the drawings, and the detailed description is as follows. In order to make the above and other objects, features and advantages of the present invention more comprehensible, the following specific examples are given in conjunction with the accompanying drawings to describe in detail as follows.

The key scanning method, the scanning method used in the key scanning circuit, and the input device provided by the embodiments of the present invention can be applied to a desktop computer, a notebook computer, or other electronic products that use a keyboard. By interspersing multiple scans for key keys or frequently used keys, the interval between two consecutive scans of these key keys can be shortened, so that these key keys can have more scan times per unit time, which means that Scan these key keys at a higher frequency. This greatly shortens the interval between two consecutive scans of these key keys, and shortens the response time of these key keys. In this way, when the user presses these key buttons, the mechanical action of the user pressing the key buttons can be converted into electrical signals more quickly, which can be input to the e-sports game or word processing software running in the host more quickly. The embodiment of the present invention utilizes a storage device that stores instructions for executing the key scan method, and is electrically connected to a processor of the storage device to execute program instructions to control, trigger, or detect the key scan circuit of the input device to perform Multiple operations.

Please refer to FIG. 1. FIG. 1 is a flowchart of a key scanning method for executing the first scan mode and the second scan mode according to an embodiment of the present invention, and also refer to FIGS. 4A to 6 to understand the operation of the keyboard key scanning Process. FIG. 4A is a schematic diagram of a 6*21 key matrix that can be used by a keyboard according to another embodiment of the present invention, and FIG. 4B is a keyboard that can use 6*21 keys in the first scan mode according to another embodiment of the present invention A schematic diagram of a matrix. FIG. 4C is a schematic diagram illustrating that a keyboard in the second scan mode can use a 6*21 key matrix according to another embodiment of the present invention. Fig. 5 is a block diagram of a keyboard input device according to an embodiment of the present invention. The input device has two scanning modes, corresponding to two key groups respectively. 6 is a block diagram of another keyboard input device according to the present invention. The input device has three scanning modes, corresponding to three key groups respectively.

In this embodiment, a key scanning method is applicable to an input device with multiple keys. A part of the keys forms the first key group 10, and the other part of the keys forms the second key group 20. , And the input device has multiple scan lines for scanning the multiple keys, the multiple scan lines include a first main scan line Sa(1) and a plurality of sub scan lines Sb(1) to Sb(N). A main scanning line Sa(1) is electrically connected to the first button group 10 (specifically connected to the plurality of buttons included in the first button group 10), and the plurality of sub-scanning lines Sb(1) to Sb(N ) Is electrically connected to the second button group 20 (specifically, connected to the plurality of buttons included in the second button group 20).

The arrangement of the above-mentioned multiple keys is a matrix consisting of R columns and C rows, where R and C are positive integers greater than or equal to 2. In addition to the above-mentioned multiple scan lines, the input device also has multiple sensing signal lines SS corresponding to multiple keys. In actual operation, multiple scan lines are arranged corresponding to the first column to the Rth column of the matrix, and multiple sensing signal lines SS are arranged corresponding to the first row to the Cth row of the matrix. Taking the 104-key keyboard commonly used by more people as an example, the matrix size currently used more frequently is 6 columns * 21 rows (that is, R is 6 and C is 21), and the input device can have 6 scan lines and 21 sensing signal lines. As shown in Figure 4A, when the input device is in the general scan mode, the sequence of triggering six scan lines in turn is: Row0 -> Row1-> Row2-> until Row5, so when a scan loop is completed, six scan lines Each of them is triggered the same number of times. As shown in Figure 4B, when the input device is in the gaming scan mode, the key scan circuit will classify six scan lines, set Row0 as the first main scan line Sa(1), and set Row1~Row5 as five sub scans Lines Sb(1) to Sb(5). For example, the multiple buttons included in the first button group 10 are specific buttons that are frequently used in gaming games, such as "W", "A", "S", and "D" four English letter keys There are four direction keys "up", "down", "left" and "right", and these keys can be arranged in the first row of the matrix Row0 (that is, corresponding to the aforementioned first main scan line Sa(1)). The other keys that are not frequently used during gaming operations can be arranged in the second to sixth rows Row1 to Row5 of the matrix (that is, corresponding to the aforementioned secondary scan lines Sb(1) to Sb(5)). As described in the flowchart shown in Fig. 8 later, when a scan loop is completed, the number of triggered scans of the first main scan line Sa(1) is higher than each of the sub scan lines Sb(1) to Sb(5) The number of triggered scans. The column sequence of the multiple sub-scanning lines Sb(1) to Sb(N), that is, Sb(1) to Sb(5), is arranged after the column sequence of the first main scanning line Sa(1), that is, The priority order of scanning arrangement of the plurality of sub-scanning lines Sb(1) to Sb(N) is lower than the order of scanning arrangement priority of the first main scanning line Sa(1). The multiple sensing signal lines SS are arranged corresponding to the first row to the Cth row of the matrix, that is, corresponding to the first row to the twenty-first row (ie, Col. 0 to Col. 20) of the matrix.

If the input device has both an e-sports scanning mode and a document scanning mode described later, you can refer to FIG. 4C to set the first row and the second row of buttons. As shown in Figure 4C, when the input device is in the document scanning mode, the key scanning circuit will classify the six scanning lines and set Row0 to Row1 as the two main scanning lines Sa(1) to Sa(2) (can be separately Defined as the first main scan line Sa(1) and the second main scan line Sa(2)), and set Row2 to Row5 as four sub scan lines Sb(1) to Sb(4); for example, the first button Group 10 contains keys that are frequently used in clerical operations, such as at least 26 English letter keys "A to Z", and these keys can be set on Row0 to Row1 of the matrix (that is, corresponding to the two main scan lines Sa (1) to Sa(2)). Other keys that are not frequently used in word processing operations can be arranged in the third to sixth rows Row2 to Row5 of the matrix (that is, corresponding to the aforementioned secondary scan lines Sb(1) to Sb(4)). As described in the flowchart shown in Fig. 9 later, when a scan loop is completed, the number of triggered scans for each of the two main scan lines Sa(1) to Sa(2) is higher than that of the secondary scan line Sb(1) The number of triggered scans for each item in Sb(4).

As shown in FIG. 1, the embodiment of the present invention can be practically applied to a keyboard having two scanning modes, for example, a general scanning mode (referred to as a general mode) and a gaming scanning mode (referred to as a gaming mode). In step S200, setting the scan mode can be that the system executes the scan mode setting by automatic detection and automatic judgment. For example, when the system detects that the user starts the game, the system will automatically set the scan mode to the first scan. Mode (e-sports mode). Of course, the user can also manually set the scan mode. In step S210, before executing the first scan mode or the second scan mode, the method further includes determining which of the first scan mode and the second scan mode is enabled, that is, which mode is to be executed. The second scan mode may be a general mode. In step S220, if the first scan mode is enabled, the first scan mode is executed, as shown in steps S221 to S223. Conversely, in step S230, if the second scan mode is enabled, the second scan mode is executed.

Next, please refer to FIG. 1, FIG. 4B and FIG. 5 at the same time to understand the operation flow of the first scanning mode. In step S220, the button scanning method includes executing a first scanning mode, the first scanning mode may be a gaming mode, and the first button group 10 includes a plurality of buttons frequently used in gaming operations, such as at least "W", There are four English letter keys "A", "S", and "D", and these keys are electrically connected to the first main scan line Sa(1), and the second key group 20 can be other keys. In step S221, the first scan mode includes executing a first scan program, the first scan program includes triggering the first main scan line Sa(1), and reading the electrical signals of the multiple sensing signal lines SS to determine the first button Whether any key in group 10 is triggered. In step S222, a second scan program is executed. The second scan program is to trigger at least one of the plurality of sub-scanning lines Sb(1) to Sb(N), and to read the electrical power of the plurality of sensing signal lines SS. Signal to determine whether a button in the second button group 20 is triggered. For example, take whether the voltage level of a button is a high level as an example to determine whether the button is pressed. If the user only presses the four English letter keys "W", "A", "S", and "D". That is to say, when the first main scanning line Sa(1) is triggered, the electrical signals of the twenty-one sensing signal lines SS are read, and as a result, only the first to fourth sensing signal lines SS (ie, Col. 0 The voltage level to Col.3) is the high level, and the rest are the low level. At this time, it can be judged that the four English letter keys "W", "A", "S", and "D" are Press. In other words, the stage of the first scanning program can immediately know that the four English letter keys are pressed, without waiting until the stage of the second scanning program. Therefore, the response time of specific keys can be shortened by software, and the response speed can be improved.

In step S223, the first scanning program and the second scanning program are executed alternately, and each sub-scanning line Sb(1) to Sb(N) is triggered at least once. In other words, the first scanning program and the second scanning program are interleaved and alternate scanning methods. For example, it can be the first main scan line Sa(1) with one sub scan line; it can also be the first main scan line Sa(1) with two sub scan lines; or it can be the first main scan line Sa(1) With three secondary scan lines and so on. Taking the first main scan line Sa(1) with a sub scan line as an example, the first main scan line Sa(1) can be triggered first, then the sub scan line Sb(1) is triggered; then the first main scan line Sa is triggered (1), then trigger the secondary scan line Sb(2); then trigger the first main scan line Sa(1), then trigger the secondary scan line Sb(3); then trigger the first main scan line Sa(1), Then trigger the secondary scan line Sb(3); then trigger the first main scan line Sa(1), then trigger the secondary scan line Sb(4); then trigger the first main scan line Sa(1), then trigger the secondary scan Line Sb(5), thus completing a scan loop, and so on, and then continue to loop the next scan loop. Assuming that the time T to trigger the scan line is 0.5ms, in the first scan mode, the scan loop of the first button group 10 is 1ms (2T), that is, the first button group 10 is scanned once every 1ms; the second button The scan loop of group 20 is 5ms (10T), that is, the second key group 20 is scanned every 5ms. In this way, the scanning loop of the first button group 10 is greatly shortened, and the button response time of the first button group 10 is shortened.

If the second scan mode is enabled, the second scan mode is executed, as shown in step S230. Please refer to FIG. 1 and FIG. 4A at the same time to understand the operation flow of the second scanning mode. In step S231, the second scan mode includes alternately executing the first scan program and the third scan program. The third scan program includes sequentially triggering the plurality of sub-scanning lines Sb(1) to Sb(N), and reading the The electrical signals of the plurality of signal lines SS are sensed to determine whether a button in the second button group 20 is triggered. In other words, the first scanning program and the third scanning program are interleaved and alternate scanning methods. For example, the first main scan line Sa(1) is triggered first, and then the sub scan lines Sb(1) to Sb(N) may be triggered in sequence to complete a scan loop, and so on, and then continue to loop down A scan loop.

Then, please refer to FIG. 2, FIG. 4C and FIG. 6 at the same time to understand the operation flow of the third scanning mode. 2 is a schematic flowchart of a key scanning method for executing the first scan mode, the second scan mode, and the third scan mode according to an embodiment of the present invention, that is, the e-sports mode, the general mode, and the document scanning mode (referred to as document scanning mode) Mode). In the embodiment of the present invention, another part of the plurality of keys on the aforementioned keyboard forms the third key group 30, and among the plurality of scan lines used to scan the plurality of keys, except for the first main scan line Sa(1), It also includes a second main scan line Sa(2), the second main scan line Sa(2) is electrically connected to the third button group 30 (specifically connected to the multiple buttons included in the third button group 30), and the button The scanning method further includes a third scanning mode, and corresponds to the step of determining which of the first scanning mode (that is, the gaming mode) and the second scanning mode (that is, the normal mode) is enabled in FIG. 1, as shown in FIG. The method further includes determining whether the third scan mode is enabled. If the third scan mode is enabled, the third scan mode (ie, document mode) is executed. It should be noted that the key scanning methods related to the first scanning mode and the second scanning mode of steps S220 to S231 have been described in detail in the foregoing embodiment, and will not be repeated here.

In step S300, setting the scan mode can be that the system executes the scan mode setting by automatic detection and automatic judgment. For example, when the system detects that the user has opened the word processing software, the system will automatically set the scan mode to the first Three scan mode. Or the user can manually set the scan mode. In step S310, the key scan method includes determining which of the first scan mode, the second scan mode, and the third scan mode is enabled. In step S340, if the third scan mode is enabled, the third scan mode is executed.

Then, in step S341, the third scan mode includes executing the first scan program (the specific execution content can be as shown in step S221); and then executes the fourth scan program, which includes triggering the second main scan line Sa(2 ), and read the electrical signals of the multiple sensing signal lines SS to determine whether a button in the third button group 30 is triggered; and then execute the second scanning program (the specific execution content can be shown in step S222). In addition, the first scan program, the fourth scan program, and the second scan program are executed alternately, and each scan line Sb(1) to Sb(N) is triggered at least once. It should be noted that the frequency of use of the first button group 10 is higher than that of the third button group 30. The column order of the second main scanning line Sa(2) is arranged after the column order of the first main scanning line Sa(1), and the column order of the plurality of sub-scanning lines Sb(1) to Sb(N) is arranged second After the main scan line Sa(2) in the column order.

In actual operation, the embodiment of the present invention can be practically applied to a keyboard with two scanning modes, for example, an e-sports scanning mode (referred to as an e-sports mode) and a document scanning mode (referred to as a document mode). Similarly, setting the scan mode can be that the system executes the scan mode setting by automatically detecting and automatically determining. For example, when the system detects that the user starts the game, the system will automatically set the scan mode to the first scan mode ( E-sports mode). Of course, the user can also manually set the scan mode. Before the step of executing the first scan mode or the third scan mode, the method further includes determining which of the first scan mode and the third scan mode is enabled, that is, which mode is to be executed. If the first scan mode is enabled, the first scan mode is executed; if the third scan mode is enabled, the third scan mode is executed. The third scan mode includes: first execute the first scan program; then execute the fourth scan Program, the fourth scan program includes triggering the second main scan line Sa(2), and reading the electrical signals of the multiple sensing signal lines SS to determine whether a button in the third button group is triggered; then execute the second scan program ; Among them, the first scan program, the fourth scan program and the second scan program are alternately executed, and each scan line is triggered at least once.

Then, please refer to Fig. 3 and Figs. 4A to 5 at the same time to understand the operation flow of the key scan. FIG. 3 is a schematic flow chart of a scanning method used in a key scanning circuit according to another embodiment of the present invention. It should be noted that the step flow of the scanning method used in the key scanning circuit and the step flow of the key scanning method are It is very similar and some parts are the same, and the key scanning method has been described in detail in the foregoing embodiment, and will not be repeated here, but only a key overview. In this embodiment, a scanning method used in the key scanning circuit 40, the key scanning circuit 40 can be used to scan the first key group 10 and the second key group 20, the first key group 10 includes X priority keys, the second key The group 20 includes Y secondary keys. The key scanning circuit 40 includes M main scanning lines Sa(1) to Sa(M), N secondary scanning lines Sb(1) to Sb(N), and multiple sensing signal lines SS , Where X, Y, M, N are positive integers, M main scan lines Sa(1) to Sa(M) are electrically connected to X priority buttons, N sub scan lines Sb(1) to Sb(N) Electrically connected to the Y secondary keys, the scanning method includes the following steps: Step (1) Start scanning loop, set the initial value of the main scanning times j to 0 (as shown in Step S500); Step (2a), determine the main Whether the number of scanning times j is equal to the main scanning preset upper limit Jmax (as shown in step S510), where Jmax is a positive integer. If yes, go to step (3); if not, go to step (2b); step (2b), trigger each of the M main scan lines Sa(1) to Sa(M) in turn, and read the multiple The electrical signal of the signal line SS is sensed to detect whether any of the X priority keys is triggered (as shown in step S530); step (2c), increase the value of the main scan times j, where j = j + 1 (as shown in Step S531), and return to step (2a); step (3), trigger N sub-scanning lines Sb(1) to Sb(N) in turn, and read the multiple sensing signals The electrical signal of line SS, where P secondary scan lines are coupled to Q secondary buttons among Y secondary buttons to detect whether any of the Q secondary buttons is triggered, where P <N, And Q <Y, P and Q are positive integers (as shown in step S520); step (4), in the scan loop, determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered (As shown in step S521), if yes, end the scan loop (as shown in step S540), if not, set the number of main scan times j as 0, and return to step (2a) (as shown in step S522) .

When the key scan circuit 40 is set to the first scan mode, M is equal to 1 (M=1), that is, the input device has a main scan line, defined as the first main scan line Sa(1), and the X priority keys are all powered It is connected to the first main scan line Sa(1). In the scan loop, the sequence of triggering the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) in turn can be: scan Sa(1) Jmax times, for example, if Jmax is At 3 o'clock, Sa(1) is scanned three times continuously. Then scan the sub scan lines Sb(1) to Sb(P) in sequence, then scan the first main scan line Sa(1) Jmax times, and then scan Sb(1+P) to Sb(2P), so By analogy, until Sa(1) is scanned Jmax times, and then P sub-scan lines are scanned, it is determined that N sub-scan lines Sb(1) to Sb(N) have been triggered. In actual operation, the first scan mode can be an e-sports mode. The X priority buttons include at least the four English alphabet keys "W", "A", "S", and "D" and "up", "down" and " "Left" and "Right" four direction keys.

For example, when Jmax=1 and P=1, in the scan loop, the sequence of triggering the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) in turn can be : Sa(1) -> Sb(1) -> Sa(1) -> Sb(2) -> Sa(1) -> Sb(3) until Sa(1) -> Sb(N). In other words, first trigger the first main scan line Sa(1), then trigger the sub scan line Sb(1), then trigger the first main scan line Sa(1), then trigger the sub scan line Sb(2), and then trigger The first main scan line Sa(1), then the secondary scan line Sb(3) is triggered, and so on, until the first main scan line Sa(1) is triggered, and then the secondary scan line Sb(N) is triggered.

Or, for example, when Jmax=1 and P=2, in this embodiment, the input device has a total of 6 scan lines, including one main scan line and 5 sub scan lines. In the scan loop, the sequence of triggering the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) in turn can be: Sa(1) -> [Sb(1) -> Sb(2)] -> Sa(1) -> [Sb(3) -> Sb(4)] until ->Sa(1) -> Sb(5). In this embodiment, P is equal to 2, N is equal to 5, and P cannot be divisible by N. In the last scan in the scan loop, only N sub-scanning lines Sb(1) to Sb(N) are selected. Scan one scan line Sb(5) of the scan. In actual operation, it is also possible to trigger the first main scan line Sa(1) and N secondary scan lines Sb(1) to Sb(N) alternately in the scan loop. The sequence may also be: Sa(1) -> [Sb(1) -> Sb(2)] -> Sa(1) -> [Sb(3) -> Sb(4)] until -> Sa(1) -> [Sb(5) -> Sb( 1)] so far. That is, the loops of N sub-scanning lines Sb(1) to Sb(N) can also be used as the scanning object, and then Sb(5) and Sb(1) can be scanned.

Or for example, when Jmax=1 and P=3. In the scan loop, the sequence of triggering the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) in turn can be: Sa(1) -> [Sb(1)- ＞ Sb(2) -> Sb(3)] -> Sa(1) -> [Sb(4) -> Sb(5) -> Sb(6)] until ->Sa(1) -> [Sb( N-2) -> Sb(N-1) -> Sb(N)].

Or for example, when Jmax=2 and P=1, in the scan loop, the sequence of triggering the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) in turn can be: [Sa(1) -> Sa(1)] -> Sb(1) -> [Sa(1) -> Sa(1)] -> Sb(2) until -> [Sa(1) -> Sa( 1)] -> Sb(N).

Or for example, when Jmax=3 and P=1, in the scan loop, the sequence of triggering the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) in turn can be ：[Sa(1) -> Sa(1) -> Sa(1)] -> Sb(1) -> [Sa(1) -> Sa(1) -> Sa(1)] -> Sb(2 ) Until -> [Sa(1) -> Sa(1) -> Sa(1)] -> Sb(N). In general, by increasing the number of scans for the main scan line Sa(1), the response time of the X priority keys can be greatly shortened.

When the key scanning circuit 40 is set to the second scanning mode, M is equal to 2 (M=2), and the input device has two main scanning lines, which are defined as the first main scanning line Sa(1) and the second main scanning line respectively. Sa(2), X priority buttons are electrically connected to the two main scan lines Sa(1), Sa(2), and the two main scan lines Sa(1) and Sa(2) are triggered in turn in the scan loop The sequence with the N sub-scanning lines Sb(1) to Sb(N) can be: Sa(1) to Sa(2) loop scan Jmax times -> Sb(1) to Sb(P) -> Sa(1 ) To Sa(2) lap scan Jmax times -> Sb(1+P) to Sb(2P) -> Sa(1) to Sa(2) lap scan Jmax times until -> Sa(1) to Sa( 2) After scanning Jmax times in a loop and then scanning P secondary scan lines, it is determined that all N secondary scan lines Sb(1) to Sb(N) are triggered. In actual operation, the second scanning mode can be a document mode, and the X priority keys include at least 26 English letter keys from "A to Z".

For example, when Jmax=1 and P=1, in the scan loop, two main scan lines Sa(1), Sa(2) and N sub scan lines Sb(1) to Sb(N The order of) can be: [Sa(1) -> Sa(2)]-> Sb(1) -> [Sa(1) -> Sa(2)]-> Sb(2) ->[ Sa(1 ) -> Sa(2)] -> Sb(3) until [Sa(1) -> Sa(2)] -> Sb(N). In other words, first trigger the main scan line Sa(1), then trigger the main scan line Sa(2), then trigger the secondary scan line Sb(1), then trigger the main scan line Sa(1), and then trigger the main scan line Sa (2), then trigger the secondary scan line Sb(2), then trigger the main scan line Sa(1), then trigger the main scan line Sa(2), then trigger the secondary scan line Sb(3), and so on, Until the first main scan line Sa(1) is triggered, then the second main scan line Sa(2) is triggered, and then the secondary scan line Sb(N) is triggered. In general, by increasing the number of scans for the main scan lines Sa(1) and Sa(2), the response time of the X priority buttons can be greatly improved.

It will be explained that the key scanning method provided by the embodiment of the present invention and the scanning method used in the key scanning circuit can be executed in the input device 1. Please refer to FIGS. 1 to 4C at the same time. However, the present invention does not limit the key scanning method of FIGS. 1 to 2 and the scanning method used in the key scanning circuit of FIG. 3 to be executed only in the input device 1 of FIG. 5. It should be noted that, since the key scanning method and the step flow of the scanning method used in the key scanning circuit have been described in detail in the foregoing embodiment, it will not be repeated here, and only a key overview is given.

The input device 1 includes a key scanning circuit 40, a first key group 10 and a second key group 20. In actual operation, the input device 1 may be a physical keyboard. There are multiple keys on the keyboard, and each key is marked with its representative characters and symbols. In most cases, pressing a button will output a corresponding symbol, such as letters, numbers, or punctuation marks. The key scanning circuit 40 includes M main scanning lines Sa(1) to Sa(M), N secondary scanning lines Sb(1) to Sb(N), and a plurality of sensing signal lines SS, where M and N are positive integers. The first button group 10 includes X priority buttons, and M main scan lines Sa(1) to Sa(M) are electrically connected to X priority buttons, where X is a positive integer. For example, when M=1, that is, the key scan circuit 40 only includes one main scan line, which can be defined as the first main scan line Sa(1), and the X priority keys include at least "W", "A", and "S". "" and "D" four English letter keys and "up", "down", "left", "right" four direction keys, at this time X priority keys are electrically connected to the first main scan line Sa(1 ). In addition, when M=2, that is, the key scanning circuit 40 includes two main scanning lines, which can be defined as the first main scanning line Sa(1) and the second main scanning line Sa(2) respectively, and the X priority keys include at least " A to Z" 26 English letter keys, at this time, the X priority keys are electrically connected to the two main scan lines Sa(1) and Sa(2). The second button group 20 includes Y secondary buttons, and N secondary scan lines Sb(1) to Sb(N) are electrically connected to the Y secondary buttons, where Y is a positive integer.

Referring to FIG. 3, the key scanning circuit 40 of the input device 1 of the present invention can perform the following steps: Step (1) Start scanning loop, and set the initial value of the main scanning times j to 0 (as shown in step S500); (2a) Determine whether the main scan times j is equal to the main scan preset upper limit Jmax (as shown in step S510), where Jmax is a positive integer. If yes, proceed to step (3); if not, proceed to step (2b); step (2b), trigger each of the M main scan lines Sa(1) to Sa(M) in turn, and read the multiple The electrical signal of the sensing signal line SS is used to detect whether any of the X priority keys is triggered (as shown in step S530); step (2c), increase the value of the main scan times j, where j = j + 1 ( (As shown in step S531), and return to step (2a); step (3), trigger N sub-scanning lines Sb(1) to Sb(N) in turn, and read the above-mentioned multiple scan lines. Sensing the electrical signal of the signal line SS. Among them, the P secondary scan lines are coupled to the Q secondary buttons of the Y secondary buttons to detect whether the Q secondary buttons are triggered, where P <N, and Q <Y, P and Q are positive integers (as shown in step S520); step (4), in the scan loop, determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered ( (As shown in step S521), if not, set the number of main scan times j to 0, and return to step (2a), if yes, end the scan loop (as shown in step S540).

When the key scan circuit 40 is not set to the first scan mode, M is equal to 1 (M=1), that is, the input device has one main scan line, defined as the first main scan line Sa(1), Jmax=1, P =N, in the scan loop, the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) are triggered alternately. The sequence can be: Sa(1) -> Sb(1) -> Sb(2) -> Sb(3) Until Sb(N), each of the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) is triggered The same number of times. For another example, when Jmax=1 and P=1, in the scan loop, the sequence of triggering the first main scan line Sa(1) and N sub scan lines Sb(1) to Sb(N) in turn can be Yes: Sa(1) -> Sb(1) -> Sa(1) -> Sb(2) -> Sa(1) -> Sb(3) until Sa(1) -> Sb(N), so The number of times that the first main scan line Sa(1) is triggered is higher than the number of times that each of the N secondary scan lines Sb(1) to Sb(N) is triggered.

When the key scan circuit 40 is set to the first scan mode, Jmax >= 1, P <N, in the scan loop, the first main scan line Sa(1) and N sub scan lines Sb(1) are triggered alternately The order to Sb(N) can be: Sa(1) scan Jmax times -> [Sb(1) -> to Sb(P)] -> Sa(1) scan Jmax times -> [Sb(P+1) ->to Sb(2P)] until Sa(1) scans Jmax times and then P scan lines are scanned, it is determined that N scan lines Sb(1) to Sb(N) have been triggered, so that the first The number of times that the main scan line Sa(1) is triggered is higher than the number of times that each of the N sub-scan lines Sb(1) to Sb(N) is triggered.

When the key scan circuit 40 is not set to the second scan mode, M is equal to 2 (m=2), that is, the input device has two main scan lines, defined as the first main scan line Sa(1) and the second main scan line respectively. Scan line Sa(2), Jmax = 1, P=N, in the scan loop, two main scan lines Sa(1), Sa(2) and N secondary scan lines Sb(1) to Sb( The order of N) can be: Sa(1) -> Sa(2) -> Sb(1) -> Sb(2) -> Sb(3) until Sb(N), so that the two main scan lines Sa( 1) Each of Sa(2) and each of the N secondary scan lines Sb(1) to Sb(N) are triggered the same number of times. For another example, when Jmax=1 and P=1, in the scan loop, two main scan lines Sa(1), Sa(2) and N sub scan lines Sb(1) to Sb( The order of N) can be: [Sa(1) ->Sa(2)] -> Sb(1) ->[ Sa(1) ->Sa(2)] -> Sb(2) -> [Sa( 1) ->Sa(2)] -> Sb(3) until [Sa(1) -> Sa(2)] -> Sb(N), so that the two main scan lines Sa(1) are triggered It is higher than the number of times that each of the N secondary scan lines Sb(1) to Sb(N) is triggered.

When the key scan circuit 40 is set to the second scan mode, Jmax >= 1, P <N, in the scan loop, the two main scan lines Sa(1), Sa(2) and N secondary scans are triggered in turn The order of the lines Sb(1) to Sb(N) is: [Sa(1)->Sa(2)] loop scanning Jmax times -> [Sb(1) -> Sb(2) ->... Sb (P)] Scan once -> [Sa(1)->Sa(2)] lap scan Jmax times -> [Sb(P+1)... Sb(2P)] Scan once until [Sa(1) ->Sa(2)] After scanning Jmax times in a loop and then scanning P sub-scanning lines, it is determined that N sub-scanning lines Sb(1) to Sb(N) are triggered, so that two main scanning lines Sa (1)~Sa(2) has a higher number of triggers than each of the N scan lines Sb(1) to Sb(N).

It will be explained that the key scanning method and the scanning method used in the key scanning circuit provided by the embodiments of the present invention can be executed in the input device 3, please refer to FIGS. 1 to 4C at the same time. However, the present invention does not limit the key scanning method of FIGS. 1 to 2 and the scanning method used in the key scanning circuit of FIG. 3 to be executed only in the input device 3 of FIGS. 7A to 7C. 7A is a block diagram of another keyboard input device according to the present invention, which is suitable for the first scanning mode. 7B is a block diagram of another keyboard input device according to the present invention, which is suitable for the second scanning mode. 7C is a block diagram of another keyboard input device according to the present invention, which is suitable for the third scanning mode. It should be noted that, since the key scanning method and the step flow of the scanning method used in the key scanning circuit have been described in detail in the foregoing embodiment, it will not be repeated here, and only a key overview is given.

The input device 3 includes a key scanning circuit 40 and a key group 50. The key group 50 may include a first key group 10 and a second key group 20. The input device 3 may be a physical keyboard, and the keyboard has a plurality of keys, and each key is marked with its representative characters and symbols. In most cases, pressing a button will output a corresponding symbol, such as letters, numbers, or punctuation marks. The key scanning circuit 40 includes N+1 scanning lines Row 0 to Row N, and a plurality of sensing signal lines SS, where N is a positive integer.

Please refer to Figure 8 to Figure 10. 8 to 10 are schematic diagrams of the process of executing the button scanning method of the present invention according to another embodiment of the present invention. As shown in step S800 in FIG. 8, the key scan circuit 40 performs the following steps: starts a scan loop, determines whether the input device 3 is currently in one of the first scan mode, the second scan mode, or the third scan mode, and executes them accordingly. Step S810 (path C-corresponding to the first scanning mode), step S821 (path A-corresponding to the second scanning mode) or step S841 (path B-corresponding to the third scanning mode). It should be noted that, in actual operation, the first scanning mode may be a general mode; the second scanning mode may be an e-sports mode; and the third scanning mode may be a document mode.

As shown in step S810 in FIG. 8, when the input device 3 is in the first scan mode, the following steps are executed. First, the key scan circuit 40 triggers one of the plurality of scan lines Row 0~Row N in turn until each of the plurality of scan lines is triggered, and reads the electrical signals of the plurality of sensing signal lines SS, and then detects Whether a button in the input device 3 is triggered and the scanning loop is ended.

As shown in step S821 in FIG. 9, when the input device 3 is in the second scan mode, the key scan circuit 40 defines the scan line Row0 as the first main scan line Sa(1), and defines the scan lines Row1~RowN as N The secondary scan lines Sb(1) to Sb(N). Next, the key scanning circuit 40 defines the X1 keys electrically connected to the first main scanning line Sa(1) as the first key group 10, and electrically connects to the rest of the first main scanning line Sa(1) Y1 buttons are defined as the second button group 20, where X1 and Y1 are positive integers (as shown in step S822). It should be noted that the X1 priority keys include at least the four alphabet keys "W", "A", "S", and "D" and the four directions of "up", "down", "left" and "right" key. Next, the initial value of the main scan number j is set to 0 (as shown in step S823). Then, it is determined whether the number of main scans j is equal to the preset upper limit Jmax, where the preset upper limit Jmax is a positive integer (as shown in step S824). If yes, execute step S825, if not, execute step S830.

What is to be explained next is the flow of steps when the number of main scans j is equal to the preset upper limit Jmax. First, P of the N secondary scan lines Sb(1) to Sb(N) are triggered in turn, where the P secondary scan lines are Q secondary buttons coupled to the Y1 secondary buttons. Next, read the electrical signals of the multiple sensing signal lines SS to detect whether any of the Q secondary keys is triggered, where P<N, Q<Y1, P and Q are positive integers (as shown in step S825) . Next, determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered (as shown in step S826), if not, set the number of main scan times j to 0, and return to step S824 (as shown in Step S828), if yes, end the scan loop (shown in step S827).

What will be explained next is the flow of steps when the number of main scans j is not equal to the preset upper limit Jmax. First, trigger the first main scan line Sa(1), read the electrical signals of multiple sensing signal lines SS, and detect whether any of the X1 priority keys is triggered (as shown in step S830). Next, increase the value of the number of main scans j, where j=j+1, and return to step S824 (as shown in step S831).

As shown in step S841 in FIG. 10, when the input device 3 is in the third scan mode, the key scan circuit 40 defines the scan lines Row0~Row1 as two main scan lines Sa(1)~Sa(2), and the scan lines Row2~RowN are defined as N-1 secondary scan lines Sb(1) to Sb(N-1). Next, the button scanning circuit 40 defines the X2 buttons electrically connected to the two main scanning lines Sa(1)~Sa(2) as the first button group, and electrically connects them to the two main scanning lines Sa( 1) The remaining Y2 buttons of ~Sa(2) are defined as the second button group, and X2 and Y2 are positive integers (as shown in step S842). It should be noted that the X2 priority keys include at least 26 English letter keys from "A to Z" and four direction keys "up", "down", "left" and "right". Next, the initial value of the number of main scans j is set to 0 (as shown in step S843). Then, it is determined whether the number of main scans j is equal to the preset upper limit Jmax, where the preset upper limit Jmax is a positive integer (as shown in step S844), if yes, step S845 is executed, and if not, step S850 is executed.

What is to be explained next is the flow of steps when the number of main scans j is equal to the preset upper limit Jmax. First, P of the N-1 secondary scan lines Sb(1) to Sb(N-1) are triggered in turn. The P secondary scan lines are coupled to the Q secondary buttons of the Y2 secondary buttons, and Read the electrical signals of multiple sensing signal lines SS, and detect whether any key is triggered in the Q secondary keys, where P＜N-1, Q＜Y2, P and Q are positive integers (as shown in step S845) . Next, determine whether the N-1 secondary scan lines Sb(1) to Sb(N-1) have been triggered (as shown in step S846), if not, set the number of main scan times j to 0, and return to step S844 (shown in step S847), if yes, end the scan loop (shown in step S827).

What will be explained next is the flow of steps when the number of main scans j is not equal to the preset upper limit Jmax. First, trigger the two main scan lines Sa(1)~Sa(2) in turn, read the electrical signals of multiple sensing signal lines SS, and detect whether any of the X2 priority keys is triggered (as shown in step S850) . Next, increase the value of the number of main scans j, where j=j+1, and return to step S844 (as shown in step S851).

In summary, the key scanning method, the scanning method used in the key scanning circuit, and the input device provided by the embodiments of the present invention. By performing interspersed and alternate scanning of key keys or commonly used keys, that is, the number of scans is increased to the main scan line coupled to these key keys, so as to shorten the scan loop of these key keys, so as to correct these key keys. Press the key to scan faster. In this way, the scanning loop of these key keys is greatly shortened, and the response speed of these key keys is also accelerated.

Through the detailed description of the above preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the preferred embodiments disclosed above are not used to limit the protection scope of the present invention. On the contrary, its purpose is to cover various changes and equivalent arrangements within the protection scope of the claims of the present invention. Therefore, the protection scope of the claims of the present invention should be interpreted in the broadest way based on the above description so as to cover all possible changes and equivalent arrangements.

1, 2, 3: Input device 10: The first button group 20: The second button group 30: The third button group 40: Button scanning circuit 50: Button group Row 1～Row N: scan line Sa(1)～Sa(M): main scan line Sb(1)～Sb(N): secondary scan line SS: Sensor signal line

FIG. 1 is a schematic flowchart of a key scan method for executing a first scan mode and a second scan mode according to an embodiment of the present invention. 2 is a schematic flowchart of a key scan method for executing the first scan mode, the second scan mode, and the third scan mode according to an embodiment of the present invention. FIG. 3 is a schematic flowchart of a scanning method used in a key scanning circuit according to another embodiment of the present invention. FIG. 4A is a schematic diagram illustrating that a keyboard can use a 6*21 key matrix according to another embodiment of the present invention. FIG. 4B is a schematic diagram illustrating that a keyboard in the first scan mode can use a 6*21 key matrix according to another embodiment of the present invention. FIG. 4C is a schematic diagram illustrating that a keyboard in the second scan mode can use a 6*21 key matrix according to another embodiment of the present invention. 5 is a block diagram of a keyboard input device according to an embodiment of the present invention. The input device has two scanning modes, corresponding to two key groups respectively. 6 is a block diagram of another keyboard input device according to the present invention. The input device has three scanning modes, corresponding to three key groups respectively. 7A is a block diagram of another keyboard input device according to the present invention, which is suitable for the first scanning mode. 7B is a block diagram of another keyboard input device according to the present invention, which is suitable for the second scanning mode. 7C is a block diagram of another keyboard input device according to the present invention, which is suitable for the third scanning mode. FIG. 8 is a schematic flowchart of a key scan method for executing the first scan mode according to another embodiment of the present invention. FIG. 9 is a schematic flowchart of a key scan method for executing the second scan mode according to another embodiment of the present invention. FIG. 10 is a schematic flowchart of a key scan method for executing the third scan mode according to another embodiment of the present invention.

S200～S231: Process steps

Claims (25)

A key scanning method is suitable for an input device with multiple keys. A part of the multiple keys forms a first key group, and another part of the multiple keys forms a second key group, and the input device also has For scanning the plurality of scan lines of the plurality of keys and the plurality of sensing signal lines corresponding to the plurality of keys, the plurality of scan lines include a first main scan line and a plurality of sub scan lines, wherein the first main scan line is electrically Are electrically connected to the first button group, the plurality of secondary scan lines are electrically connected to the second button group, and the button scanning method includes: Perform a first scan mode, the first scan mode includes: Execute a first scan program, the first scan program includes triggering the first main scan line, and reading the electrical signals of the plurality of sensing signal lines to determine whether a button in the first button group is triggered; and Execute a second scan program, the second scan program is to trigger at least one of the plurality of secondary scan lines, and read the electrical signals of the plurality of sensing signal lines to determine whether there is a button in the second button group Be triggered Wherein, the first scan program and the second scan program are executed alternately, and each scan line is triggered at least once. As for the button scanning method described in item 1 of the scope of patent application, the arrangement of the plurality of buttons is a matrix consisting of R columns and C rows, where R and C are positive integers greater than or equal to 2. According to the key scanning method described in item 2 of the scope of patent application, the column sequence of the multiple sub-scanning lines is arranged after the column sequence of the first main scanning line, and the multiple sensing signal lines correspond to the first row of the matrix Go to line C to set. For the key scanning method described in item 1 of the scope of patent application, the key scanning method further includes a second scanning mode, wherein before the step of executing the first scanning mode or the second scanning mode, the key scanning method further includes: Determining which of the first scanning mode and the second scanning mode is enabled; If the first scan mode is enabled, execute the first scan mode; and If the second scan mode is enabled, the second scan mode is executed. The second scan mode includes alternately executing the first scan program and the third scan program, and the third scan program includes sequentially triggering the multiple lines Scan lines, and read the electrical signals of the plurality of sensing signal lines to determine whether a button in the second button group is triggered. The button scanning method described in item 4 of the scope of patent application, wherein another part of the plurality of buttons forms a third button group, and the plurality of scan lines used to scan the plurality of buttons further includes a second main scan line , The second main scan line is electrically connected to the third key group, the key scan method further includes a third scan mode, and in the step of executing the first scan mode, the second scan mode, or the third scan mode Previously, the key scan method also includes: Determine which of the first scan mode, the second scan mode, and the third scan mode is enabled; and If the third scanning mode is enabled, the third scanning mode is executed, and the third scanning mode includes: Execute the first scanning program; Execute a fourth scan program, the fourth scan program includes triggering the second main scan line, and reading the electrical signals of the plurality of sensing signal lines to determine whether a button in the third button group is triggered; and Execute the second scanning program; Wherein, the first scan program, the fourth scan program, and the second scan program are executed alternately, and each scan line is triggered at least once. According to the key scanning method described in item 5 of the scope of patent application, the frequency of use of the first key group is higher than that of the third key group. As for the key scanning method described in item 5 of the scope of patent application, the column sequence of the second main scanning line is arranged after the column sequence of the first main scanning line, and the column sequence of the plurality of sub scanning lines is arranged in the first After the column sequence of the main scan line. The button scanning method described in item 1 of the scope of patent application, wherein another part of the plurality of buttons forms a third button group, and the plurality of scan lines used to scan the plurality of buttons further includes a second main scan line , The second main scanning line is electrically connected to the third key group, the key scanning method further includes a third scanning mode, and before the step of executing the first scanning mode or the third scanning mode, the key scanning method Also includes: Determining which of the first scanning mode and the third scanning mode is enabled; If the first scan mode is enabled, execute the first scan mode; and If the third scanning mode is enabled, the third scanning mode is executed, and the third scanning mode includes: Execute the first scanning program; Execute a fourth scan program, the fourth scan program includes triggering the second main scan line, and reading the electrical signals of the plurality of sensing signal lines to determine whether a button in the third button group is triggered; and Execute the second scanning program; Wherein, the first scan program, the fourth scan program, and the second scan program are executed alternately, and each scan line is triggered at least once. In the key scanning method described in item 8 of the scope of patent application, the frequency of use of the first key group is higher than that of the third key group. According to the key scanning method described in item 8 of the scope of patent application, the column sequence of the second main scanning line is arranged after the column sequence of the first main scanning line, and the column sequence of the plurality of sub-scanning lines is arranged in the first After the column sequence of the main scan line. A scanning method used in a key scanning circuit. The key scanning circuit can scan a first key group and a second key group. The first key group includes X priority keys, and the second key group includes Y secondary keys. The key scan circuit includes M main scan lines Sa(1) to Sa(M), N sub scan lines Sb(1) to Sb(N), and multiple sensing signal lines, where X, Y, M, and N are positive Integer, the M main scan lines Sa(1) to Sa(M) are electrically connected to the X priority buttons, and the N secondary scan lines Sb(1) to Sb(N) are electrically connected to the Y secondary To press the key, the scanning method includes the following steps: Step (1), start the scan loop, and set the initial value of the main scan times j to 0; Step (2a), determine whether the number of main scans j is equal to the preset upper limit Jmax of the main scan, where Jmax is a positive integer, if yes, execute step (3), if not, execute step (2b); Step (2b), trigger each of the M main scan lines Sa(1) to Sa(M) in turn, read the electrical signals of the multiple sensing signal lines to detect whether there are any of the X priority buttons The button is triggered; Step (2c), increase the value of the main scan times j, where j = j + 1, and return to step (2a); Step (3), trigger P sub-scan lines of the N sub-scan lines Sb(1) to Sb(N) in turn, and read the electrical signals of the plurality of sensing signal lines, where the P sub-scan lines The line is coupled to the Q secondary buttons of the Y secondary buttons to detect whether any of the Q secondary buttons is triggered, where P <N and Q <Y, P and Q are positive integers ;as well as Step (4), in the scan loop, determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered, if yes, end the scan loop, if not, set the main scan The number of times j is 0, and return to step (2a). The scanning method described in item 11 of the scope of patent application, wherein when the key scanning circuit is set to the first scanning mode, M=1, the key scanning circuit has a main scanning line defined as the first main scanning line Sa (1) The X priority buttons are all electrically connected to the first main scan line Sa(1), and in the scan loop, the first main scan line Sa(1) and the N times The sequence of scanning lines Sb(1) to Sb(N) is: Sa(1) scan Jmax times -> Sb(1) to Sb(P) scan once in turn -> Sa(1) scan Jmax times -> Sb(1 +P) to Sb(2P) scan once until the N sub-scanning lines Sb(1) to Sb(N) are all scanned. The scanning method described in item 12 of the scope of patent application, wherein when Jmax=1 and P=1, in the scanning loop, the first main scanning line Sa(1) and the N secondary scanning lines are triggered alternately The order of Sb(1) to Sb(N) is: Sa(1) -> Sb(1) -> Sa(1) -> Sb(2) -> Sa(1) -> Sb(3) until step Sa (1) -> Sb(N). The scanning method described in item 12 of the scope of patent application, wherein the first scanning mode is an e-sports mode, and the X priority buttons contain at least four English letters "W", "A", "S", and "D" Key and the four arrow keys "up", "down", "left" and "right". The scanning method described in item 11 of the scope of patent application, wherein when the key scanning circuit is set to the second scanning mode, M=2, the key scanning circuit has two main scanning lines, respectively the first main scanning line Sa(1) and the second main scan line Sa(2), the X priority buttons are electrically connected to the two main scan lines Sa(1), Sa(2), and in the scan loop, trigger the The order of the two main scanning lines Sa(1), Sa(2) and the N sub-scanning lines Sb(1) to Sb(N) is: Sa(1) to Sa(2) loop scanning Jmax times -> Sb(1) to Sb(P) scan once -> Sa(1) to Sa(2) loop scan Jmax times -> Sb(1+P) to Sb(2P) scan once -> Sa(1) to Sa (2) Loop scanning Jmax times -> Sb(1+2P) to Sb(3P) scanning once, until the N sub-scanning lines Sb(1) to Sb(N) are all scanned. The scanning method described in item 15 of the scope of patent application, wherein when Jmax=1 and P=1, in the scanning loop, the two main scanning lines Sa(1), Sa(2) and the The sequence of N secondary scan lines Sb(1) to Sb(N) is: Sa(1) -> Sa(2)-> Sb(1) -> Sa(1) -> Sa(2)-> Sb( 2) -> Sa(1) -> Sa(2) -> Sb(3), until step [Sa(1) -> Sa(2) -> Sb(N)]. The scanning method described in item 16 of the scope of patent application, wherein the second scanning mode is a document mode, and the X priority keys include at least 26 English letter keys "A to Z". An input device, including: Key scan circuit, the key scan circuit includes M main scan lines Sa(1) to Sa(M), N sub scan lines Sb(1) to Sb(N) and multiple sensing signal lines, where M and N are Positive integer; A first button group, the first button group includes X priority buttons, the M main scan lines Sa(1) to Sa(M) are electrically connected to the X priority buttons, where X is a positive integer; and A second button group, the second button group includes Y secondary buttons, the N secondary scan lines Sb(1) to Sb(N) are electrically connected to the Y secondary buttons, where Y is a positive integer; The key scanning circuit performs the following steps: Step (1), start scanning loop, set the initial value of the main scanning times j to 0; Step (2a), judge whether the main scan number j is equal to the main scan preset upper limit Jmax, where Jmax is a positive integer; if it is, execute step (3), if not, execute step (2b); Step (2b), trigger each of the M main scan lines Sa(1) to Sa(M) in turn, and read the electrical signals of the multiple sensing signal lines to detect whether the X priority buttons are A key is triggered; Step (2c), increase the value of the main scan times j, where j = j + 1, and return to step (2a); Step (3): Trigger P of the N secondary scan lines Sb(1) to Sb(N) in turn, and read the electrical signals of the plurality of sensing signal lines, where the P secondary scan lines The scan line is coupled to the Q secondary buttons of the Y secondary buttons to detect whether any of the Q secondary buttons is triggered, where P <N and Q <Y, and P and Q are Positive integer; and Step (4), in the scan loop, determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered, if not, set the main scan number j to 0, and return Step (2a), if yes, end the scan loop. For example, the input device described in item 18 of the scope of patent application, where M=1, the key scan circuit has a main scan line, defined as the first main scan line Sa(1), and the X priority keys contain at least "W" , "A", "S", and "D" four English letter keys and four direction keys "up", "down", "left" and "right". The X priority keys are electrically connected to the A main scan line Sa(1); When the key scan circuit is not set to the first scan mode, Jmax = 1, P = N, in the scan loop, the first main scan line Sa(1) and the N sub scan lines are triggered in turn The sequence from Sb(1) to Sb(N) is: Sa(1) -> Sb(1) -> Sb(2) -> Sb(3) until Sb(N), so that the first main scan line Sa (1) The same number of times as each of the N secondary scan lines Sb(1) to Sb(N) is triggered; When the key scan circuit is set to the first scan mode, Jmax >= 1, P <N, in the scan loop, trigger the first main scan line Sa(1) and the N sub scans in turn The order of lines Sb(1) to Sb(N) is: Sa(1) scan Jmax times -> Sb(1) to Sb(P) scan once -> Sa(1) scan Jmax times -> Sb(P+1) ) To Sb(2P) scan once until the N secondary scan lines Sb(1) to Sb(N) have been scanned, so that the first main scan line Sa(1) is triggered more frequently than the N The number of times each of the secondary scan lines Sb(1) to Sb(N) is triggered. The input device described in item 19 of the scope of patent application, wherein when Jmax=1 and P=1, in the scan loop, the first main scan line Sa(1) and the N sub scan lines are triggered in turn The order of Sb(1) to Sb(N) is: Sa(1) -> Sb(1) -> Sa(1) -> Sb(2) -> Sa(1) -> Sb(3) until step [ Sa(1) -> Sb(N)]. The input device described in item 18 of the scope of patent application, where M=2, the key scanning circuit has two main scanning lines, namely the first main scanning line Sa(1) and the second main scanning line Sa(2) , The X priority buttons include at least 26 English letter keys "A to Z", and the X priority buttons are electrically connected to the two main scan lines Sa(1) and Sa(2); When the key scan circuit is not set to the second scan mode, Jmax = 1, P = N, in the scan loop, the two main scan lines Sa(1), Sa(2) and the The sequence of N secondary scan lines Sb(1) to Sb(N) is: Sa(1) -> Sa(2) -> Sb(1) -> Sb(2) -> Sb(3) until Sb(N ) Until each of the two main scan lines Sa(1), Sa(2) and each of the N secondary scan lines Sb(1) to Sb(N) are triggered the same number of times; When the key scan circuit is set to the second scan mode, Jmax >= 1, P <N, in the scan loop, the two main scan lines Sa(1), Sa(2) and The sequence of the N sub-scanning lines Sb(1) to Sb(N) is: Sa(1) to Sa(2) loop scan Jmax times -> Sb(1) to Sb(P) scan once -> Sa( 1) Scan Jmax times in a loop to Sa(2) -> Sb(P+1) to Sb(2P) scan once, until the N sub-scanning lines Sb(1) to Sb(N) have been scanned, The number of triggers of each of the two main scan lines Sa(1) to Sa(2) is higher than the number of triggers of each of the N secondary scan lines Sb(1) to Sb(N). For the input device described in item 19 of the scope of patent application, when Jmax=1 and P=1, in the scan loop, the two main scan lines Sa(1), Sa(2) and the The sequence of N secondary scan lines Sb(1) to Sb(N) is: Sa(1) ->Sa(2)->Sb(1) -> Sa(1) ->Sa(2) -> Sb( 2) -> Sa(1) -> Sa(2) -> Sb(3) until step Sa(1) -> Sa(2) -> Sb(N). An input device, including: Button scanning circuit, the button scanning circuit includes N+1 scanning lines Row 0~Row N, and multiple sensing signal lines, N is a positive integer; The key scanning circuit performs the following steps: Step (1), start a scanning loop, determine whether the input device is currently in one of the first scan mode, the second scan mode, or the third scan mode, and perform step (2), step (3) or step accordingly (4) One of them; Step (2), execute when the input device is in the first scan mode: The key scanning circuit triggers one of the plurality of scan lines Row 0~Row N in turn until each of the plurality of scan lines is triggered, and reads the electrical signals of the plurality of sensing signal lines, and detects the Whether a button in the input device is triggered and the scanning loop is ended; Step (3), when the input device is in the second scan mode, execute: Step (3a), the key scan circuit defines the scan line Row 0 as the first main scan line Sa(1), and defines the scan lines Row 1~Row N as N secondary scan lines Sb(1) to Sb(N ); In step (3b), the button scanning circuit defines X1 buttons electrically connected to the first main scanning line Sa(1) as a first button group, and electrically connecting the buttons to the first main scanning line Sa( 1) The remaining Y1 buttons are defined as the second button group, X1 and Y1 are positive integers; Step (3c), set the initial value of the main scan times j to 0; Step (3d), judging whether the number of main scans j is equal to the preset upper limit Jmax, where the preset upper limit Jmax is a positive integer; if yes, execute step (3g), if not, execute step (3e); Step (3e), trigger the first main scan line Sa(1), read the electrical signals of the multiple sensing signal lines, and detect whether any of the X1 priority keys is triggered; Step (3f), increase the value of the main scan times j, where j = j + 1, and return to step (3d); In step (3g), P of the N secondary scan lines Sb(1) to Sb(N) are triggered in turn, where the P secondary scan lines are coupled to Q of the Y1 secondary keys To press a key, read the electrical signals of the multiple sensing signal lines, and detect whether a key is triggered in the Q secondary keys, where P <N, Q <Y1, and P and Q are positive integers; Step (3i), determine whether the N secondary scan lines Sb(1) to Sb(N) have been triggered, if not, set the main scan number j to 0, and return to step (3d), if yes, End the scan loop; Step (4), execute when the input device is in the third scan mode: Step (4a), the key scan circuit defines the scan line Row 0~Row 1 as two main scan lines Sa(1)~Sa(2), and defines the scan line Row 2~Row N as N-1 times Scan lines Sb(1) to Sb(N-1); Step (4b), the button scanning circuit defines the X2 buttons electrically connected to the two main scanning lines Sa(1)~Sa(2) as the first button group, and electrically connects the two buttons The remaining Y2 buttons of the main scan line Sa(1)~Sa(2) are defined as the second button group, and X2 and Y2 are positive integers; Step (4c), set the initial value of the main scan times j to 0; Step (4d), determine whether the number of main scans j is equal to the preset upper limit Jmax, where the preset upper limit Jmax is a positive integer, if yes, execute step (4g), if not, execute step (4e); Step (4e), trigger the two main scan lines Sa(1)~Sa(2) in turn, read the electrical signals of the multiple sensing signal lines, and detect whether any of the X2 priority buttons is triggered; Step (4f), increase the value of the main scan times j, where j = j + 1, and go back to step (4d); Step (4g), trigger P of the N-1 secondary scan lines Sb(1) to Sb(N-1) in turn, and the P secondary scan lines are coupled to Q in the Y2 secondary keys Secondary buttons, and read the electrical signals of the multiple sensing signal lines, and detect whether any of the Q secondary buttons are triggered, where P <N-1, Q <Y2, and P and Q are positive Integer; and Step (4h), determine whether the N-1 secondary scan lines Sb(1) to Sb(N-1) have been triggered, if not, set the main scan number j to 0, and return to step (4d ), if yes, end the scan loop. Such as the input device described in item 23 of the scope of patent application, wherein the second scan mode is an e-sports mode, and the X1 priority buttons contain at least four English words: "W", "A", "S", and "D" Letter keys and four direction keys "up", "down", "left" and "right". For example, the input device described in item 23 of the scope of patent application, wherein the third scanning mode is a document mode, and the combination of the X2 priority keys includes at least 26 English letter keys "A to Z" and "up" and "down" "," "Left", "Right" four direction keys.

Images