TWI624772B - Input device and control method thereof - Google Patents

Abstract

An input device includes a button and a processing circuit. The processing circuit has an input pin and an output pin. Input pin coupling button. The output pin provides a button signal to a host device. The processing circuit controls the level of the button signal according to the level of the input pin. When the level of the input pin changes from a first level to a second level, after a predetermined time, the processing circuit sets the button signal to a third level, and ignores the input during a first mask period. The level of the pin changes and the button signal is maintained at the third level.

Description

Input device and control method thereof

The present invention relates to an input device, and more particularly to an input device having a button.

In general, a computer system is composed of three devices, namely, an input device, an output device, and a host device. The input device is used by the user to control the host device. Common input devices include mice, keyboards, trackballs, joysticks, trackpads, and more. Most input devices have at least one button. After the user presses the button, the host device will perform a corresponding action, such as opening an application. In the esports game, the user's response speed to the mouse's button is getting higher and higher. If it is not possible to judge in time whether the button is pressed, it will cause inconvenience in use.

The invention provides an input device comprising a button and a processing circuit. The processing circuit has an input pin and an output pin. Input pin coupling button. The output pin provides a button signal to a host device. The processing circuit controls the level of the button signal according to the level of the input pin. When the level of the input pin changes from a first level to a second level, after a predetermined time, the processing circuit sets the button signal to a third level and ignores during a first mask period. The level of the input pin changes and the button signal is maintained at the third level.

The invention further provides a control method applied to the input device as described above, comprising determining a level change of a button; when the level of the button changes from a first level to a second level, after a predetermined time And setting a button signal to a third level, and ignoring the level change of the button during a first masking period, and maintaining the button signal at a third level; and providing a button signal to a host device. The host device performs the function corresponding to the button according to the button signal.

100‧‧‧ operating system

110‧‧‧Input device

120‧‧‧Host device

111‧‧‧Processing Circuit

KY ₁ ~KY _n ‧‧‧ button

P ₁ ~ P _n, PO‧‧‧ pin

S _BT , S _BT1 ~ S _BT4 ‧‧‧ button signal

IM‧‧‧ impedance

LV, S _P1 ‧‧‧

T1, T2‧‧‧ time points

H‧‧‧ high standard

L‧‧‧low standard

311~314‧‧‧Shielding period

315‧‧‧Preset time

S411~S417‧‧‧Steps

In order to make the features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic diagram of an operating system of the present invention; FIG. 2B is a schematic diagram showing the level change of the button in the actual state; FIG. 3A to FIG. 3D are diagrams showing the level of the button signal and the pin; FIG. 4 is a control method of the present invention; Schematic diagram.

Figure 1 is a schematic diagram of the operating system of the present invention. As shown, the operating system 100 includes an input device 110 and a host device 120. The input device 110 may be a mouse, a keyboard, a trackball, a joystick or a touchpad, but is not intended to limit the invention. Other computer peripherals (such as printers or scanners) with buttons can also be used as the input device 110. The host device 120 executes a corresponding service program according to the information provided by the input device 110.

In the present embodiment, the input device 110 includes buttons KY ₁ -KY _n and a processing circuit 111, n being a positive integer. When one of the buttons KY ₁ to KY _n is pressed, the processing circuit 111 outputs a corresponding button signal S _BT to the host device 120. The host device 120 then performs a function or service program with respect to the pressed button. The invention does not limit the number of buttons. In a possible embodiment, the input device 110 has only a single button. ₁ to the present invention does not limit the type of keys KY KY _n. In other embodiments, the buttons KY ₁ -KY _n are mechanical switches, such as micro switches.

The processing circuit 111 has pins P ₁ to P _n and PO. Pins P ₁ ~ P _n are respectively coupled to key KY ₁ ~ KY _n. The processing circuit 111 generates a button signal S _BT according to the pressed state of the buttons KY ₁ to KY _n , and outputs a button signal S _BT to the host device 120 through the pin PO. The host device 120 executes a function or a service program corresponding to the pressed button in accordance with the key signal S _BT . The present invention does not limit how the processing circuit 111 determines the pressed state of the buttons KY ₁ to KY _n . In a possible embodiment, the processing circuit 111 determines whether a button has been pressed according to the level change of the buttons KY ₁ -KY _n . For example, when one of the buttons KY ₁ -KY _n is pressed, the level of the pressed button will change, while the level of the other unpressed button will be fixed. Therefore, by detecting the level of the buttons KY ₁ to KY _n , it is possible to know whether or not a button has been pressed.

Figure 2A is a schematic diagram showing the impedance and level changes of the button in an ideal state. Figure 2B is a schematic diagram showing the impedance and level change of the button in the actual state. Since the characteristics of the buttons KY ₁ to KY _n are the same, the following is an example of the button KY ₁ . Shown, in an ideal state, the keys KY to be pressed once and _a release process, when the button ₁ is pressed KY (i.e. time Tl), the impedance of keys KY IM ₁ by a high impedance as in FIG. 2A Change to low impedance and maintain low impedance; when button KY ₁ is released (time point T2), the impedance IM of button KY ₁ changes from low impedance to high impedance.

When the button KY ₁ is high impedance, the level LV of the button KY ₁ is a low level L. When the button KY ₁ is low impedance, the level LV of the button KY ₁ is a high level H. Thus, by measuring the level of the LV KY key _1, the key can be determined in _a depressed state KY. For example, when the level LV of the button KY ₁ is at the low level L, it indicates that the button KY ₁ is not pressed. Conversely, when the level LV of the button KY ₁ is at the high level H, it indicates that the button KY ₁ is pressed.

However, in fact, when the button KY ₁ is pressed or released, the switching state of the impedance and the level is not instantaneously completed, but is accompanied by a process of vibration, that is, a jitter phenomenon occurs in the impedance IM of the button KY ₁ (bounce ), as shown in Figure 2B. A short period of time during which the button KY ₁ is pressed, the impedance IM of the button KY ₁ is dithered as indicated by symbol 210. Similarly, when the button KY ₁ is released, a jitter phenomenon occurs in the impedance IM of the button KY ₁ , as indicated by the symbol 220.

When the key KY impedance IM ₁ jitters 210 and 220, output bit key _{KY. 1} also with quasi jitter occurs. As shown in FIG. 2B, at a time after the time point T1, the level output by the button KY ₁ changes between the high level H and the low level L, and then stabilizes at the high level H. During a period of time after the time point T2, the level output by the button KY ₁ also changes between the high level H and the low level L, and then stabilizes at the low level L.

The level jitter phenomenon of the button KY ₁ causes the processing circuit 111 to mistake the button KY _{1 for} several times, thereby outputting an erroneous button signal to the host device 120, causing the host device 120 to execute an erroneous function or service program. Due to the existence of vibration phenomenon, the button control mode of the conventional input device usually provides a debounce function, that is, the pin of the processing circuit (such as P ₁ ) temporarily does not send the button signal when the signal of the button KY ₁ is changed. S after _{the BT} device to the host, but will be confirmed after a predetermined time after the change is the status signal (eg key KY ₁ level output changes from low level to high level and is maintained at a high level), and then transmits the key signal S _BT to the host device to prevent multiple consecutive button signals from being sent. The predetermined anti-shake time in the conventional input device is usually determined according to the product specifications of the input device, and the general time is long (for example, 10 ms), so the button response of the conventional input device is slow. The present invention proposes two button control schemes to enable the button signals to be sent out in advance. Compared with the existing conventional input devices, the button reaction time is shortened, and the button response is faster.

The present invention is an input device key control scheme is: when the pin processing circuit (e.g., P ₁₎ when the read signal change key KY ₁ (the level The key KY ₁ outputted from the low level changes to high level), immediately The button signal S _{BT is} sent to the host device, and any signal for a predetermined period of time is not actuated. In a possible embodiment, the predetermined time may be less than the limit of the pressed and released interval of the button in the operation. And greater than the switch vibration time of the button.

The present invention provides another apparatus button control program inputs are: when the pin processing circuit (e.g., P ₁₎ when the read signal change key KY ₁ (e.g. key KY ₁ output level registration is changed from low to high level), An anti-shake process is performed for a first predetermined time. In a possible embodiment, the first predetermined time is less than the anti-shake time set by the original specification of the button. In another possible embodiment, the predetermined time of the anti-shake processing is set to be smaller than the anti-shake predetermined time (for example, 10 ms) of the conventional input device, for example, set to 2 ms, and the processing circuit confirms that the level output by the button is still vibrating. The state or the changed state sends a key signal S _BT to the host device, and any signal within a second predetermined time (for example, 8 ms) does not perform an action. In an implementation, the second predetermined time is the original specification of the button. The set anti-shake time is subtracted from the first predetermined time.

The predetermined time is less than the anti-shake time set by the original specification of the button.

Compared with the button control mode of the conventional input device, in any of the above-mentioned input device case processing schemes, the response speed of the button can be increased by reducing the response delay between pressing the button and the sending signal, for example, the previous processing mode can be improved. The delay of, for example, 10 ms or more is reduced, and the latter processing mode can reduce the delay of 8 ms or more.

The foregoing two input device case processing schemes of the present invention are described below through specific embodiments.

In an embodiment, when the level of the pin P ₁ is changed from a first level (such as a low level L) to a second level (such as a high level H), the processing circuit 111 sets the key signal S _BT to A third level (such as high level H). It should be understood that once the button signal S _BT is set by the processing circuit 111, the processing circuit immediately transmits the set button signal S _BT to the host device. Then, during a masking period, the level change of the pin P ₁ is ignored, and the level of the button signal S _BT is maintained at the third level. After the masking period, the processing circuit 111 sets the level of the key signal S _BT according to the level of the pin P ₁ .

For example, after the masking period, if the level of the pin P ₁ is maintained at the second level, the processing circuit 111 sets the level of the button signal S _BT at the third level. In contrast, after the mask period, if the pin P ₁ has been returned to level the first time, the key signal processing circuit 111 S _BT is set at a level fourth level (e.g., the low level L).

The present invention does not limit the relationship between the first to fourth levels. In this embodiment, the first level is different from the second level, and the third level is different from the fourth level. quasi. For example, the first level is a low level and the second level is a high level. In another possible embodiment, the first level may be the same or different from the third level, and the second level may be the same or different from the fourth level.

FIG. 3A is a schematic diagram of the level of the button signal S _BT and the pin P ₁ . In this embodiment, when the level S _P1 of the pin P ₁ is not equal to the first level (if not equal to the low level L), the processing circuit 111 sets the level of the button signal S _BT1 at the third level (eg, High level H). In a possible embodiment, when the level S _P1 of the pin P ₁ is not equal to the low level (eg, at the time point T1), the processing circuit 111 immediately sets the level of the key signal S _BT1 to the high level H.

Next, during the masking period 311, the processing circuit 111 maintains the key signal S _BT at a third level (eg, a high level H) regardless of whether the level of the pin P ₁ is the first or second level. During the shield 311, the processing circuit 111 will set the level of the key signal level in accordance pin P _1. In this embodiment, after the mask period 311, since the level S _P1 of the pin P ₁ is still maintained at the second level (such as the high level H), the processing circuit 111 sets the level of the button signal S _BT1 to be maintained. In the third level (such as high level H). In other embodiments, after the mask period 311, if the level S _P1 of the pin P ₁ has returned to the first level (as indicated by the dashed line), the processing circuit 111 immediately sets the level of the button signal S _BT1 The third level (such as the high level H) changes to the fourth level (such as the low level L).

At time T2, the level S _P1 of the pin P ₁ is returned to the first level (eg, the low level L) by the second level (eg, the high level H). Since the level S _P1 of the pin P ₁ changes, the processing circuit 111 immediately sets the key signal S _{BT1 to change} from the third level (eg, the high level H) to the fourth level (eg, the low level L). Then, during a masking period 312, processing circuit 111 ignores the change in level S _P1 of pin P ₁ and maintains button signal S _BT1 at a fourth level (e.g., low level L). During the shield 312, the processing circuit 111 would again set level in accordance with a key signal S _BT1 pin P S ₁ level of _P1.

The invention does not limit the length of the shielding periods 311 and 312. The mask period 311 may be the same or different than the mask period 312. In a possible embodiment, the masking period 311 is longer than the masking period 312. In other possible embodiments, the masking periods 311 and 312 are greater than the impedance jitter time of the button. In addition, after the user presses and releases the button, it usually takes 70 to 80 ms at a time, and then presses again. Therefore, the shielding periods 311 and 312 need to be less than 70 to 80 ms. In some embodiments, the masking period 312 is omitted.

FIG. 3B is another schematic diagram of the level of the button signal S _BT and the pin P ₁ . 3B is similar to FIG. 3A except that at time T2, although the level S _P1 of the pin P ₁ changes (from a high level to a low level), the processing circuit 111 waits for a preset time 315. After that, the level of the key signal S _BT2 is changed from the third level (such as the high level H) to the fourth level (such as the low level L). In this example, during masking period 312, processing circuit 111 ignores the change in level S _P1 of pin P ₁ and maintains button signal S _BT2 at a fourth level (e.g., low level L). After the mask period 312, the processing circuit 111 sets the level of the key signal S _BT2 according to the level S _P1 of the pin P ₁ . In a possible embodiment, after the mask period 312, the processing circuit 111 may immediately set the level of the button signal S _BT2 according to the level S _P1 of the pin P ₁ or wait for a period of time before setting the level of the button signal S _BT2 .

Figure 3C is another schematic diagram of the level of the button signal S _BT and the pin P ₁ . In this embodiment, when the level of the pin P ₁ changes, the processing circuit 111 waits for a period of time 315 to set the level of the button signal S _BT3 , and ignores the set period 313 after the setting. The level of the pin P ₁ changes until the mask period 313 is reached, and the level of the button signal S _BT3 is set according to the level of the pin P ₁ .

For example, at the time point Tl, pin P level S ₁ is a first _quasi-P1 (e.g., the low level L) changes to a second level (e.g., high level H). Although the level S _P1 of the pin P ₁ changes, the processing circuit 111 waits for a preset time 315 before setting the level of the key signal S _{BT3 to} the third level (eg, the high level H). Next, during the mask period 313, the processing circuit 111 maintains the level of the button signal S _BT3 at the third level (eg, the high level H) regardless of the level S _P1 of the pin P ₁ .

During the shield 313, when the pin P level S ₁ when the first level _P1 (e.g., the low level L) by a second level (e.g., high level H) back, the processing circuit 111 will wait for a predetermined After time 315, the level of the key signal S _BT3 is changed from the third level (e.g., high level H) to the fourth level (e.g., low level L), and then during another mask period 314, the processing circuit 111 ignores The level S _P1 of the pin P ₁ changes, and the key signal S _{BT3 is} maintained at the fourth level (such as the low level L). After the mask period 314, the processing circuit 111 sets the level of the key signal S _BT3 according to the level S _P1 of the pin P ₁ .

The mask period 314 may be the same or different than the mask period 313. In a possible embodiment, the mask period 314 is shorter than the mask period 313. In other embodiments, the masking period 314 may be the same, shorter, or longer than the masking period 312. The masking period 313 may also be the same, shorter or longer than the masking period 311.

Fig. 3D is another schematic diagram of the level of the button signal S _BT and the pin P ₁ . The first 3D view similar to FIG. 3C, except that, after 313, when the pin P is _P1 S ₁ level from the second level (e.g., high level H) back to the first level (e.g., a low level during the mask When L) (ie, time point T2), the processing circuit 111 immediately changes the level of the key signal S _BT4 from the third level (eg, high level H) to the fourth level (eg, low level L), followed by a mask. During the period 314, the level S _P1 of the pin P ₁ is ignored, and the level of the button signal S _BT4 is maintained at the fourth level (eg, the low level L). After the mask period 314, the processing circuit 111 is based on the pin P. _{1 P1} level setting button S of the signal S of the level _BT4.

Figure 4 is a flow chart of a possible embodiment of the control method of the present invention. The control method of the present invention is for determining whether a button is pressed, and setting a level of a button signal according to a pressing state of the button, so that a host device executes a corresponding service program according to the button signal.

In step S411, it is determined whether or not a button has been pressed. In a possible embodiment, step S411 determines whether the button is pressed according to the button level, but is not intended to limit the present invention. In other embodiments, step S411 may determine whether the button is pressed according to the impedance change of the button. For convenience of explanation, the following description takes the level of the button as an example.

When the level of the button changes, such as changing from a first level to a second level, indicating that the button is pressed, therefore, the level of the button signal is set to a third level (step S412). In a possible embodiment, when the level of the button changes to the second level, the level of the button signal is immediately set to the third level. In a further possible embodiment, when the level of the button changes from the first level to the second level, the level of the button signal is immediately set to the third level, and any signal for a period of time is masked. In another possible embodiment, when the level of the button changes from the first level to the second level, the level of the button signal is set to the third position after waiting for a first preset time (eg, 2 ms). quasi.

In this embodiment, the first level is different from the second level. For example, the first level is a low level or a high level, and the second level is a high level or a low level. In addition, the present invention also does not limit the size of the third level. In one In an embodiment, the third level may be the same as the first or second level.

Then, during a masking period, the level change of the button is ignored, and the button signal is maintained at the third level (step S413). The time during which the mask must be jittered longer than the level of the button. In addition, the shielding period should be shorter than the interval between two consecutive presses by the user. For example, if the user presses the button again every 70~80ms, the masking time should be shorter than 70~80ms.

After the masking period, the level of the button signal is set according to the level of the button (step S414). In the embodiment, step S414 includes steps S415 to S417. In step S415, it is judged whether or not the level of the button has changed. When the still level of the button is maintained at the second level, the level of the button signal is maintained at the third level (step S416), and the process returns to step S415 to continue to determine whether the level of the button signal has changed.

When the level of the button signal changes from the second level to the first level, it indicates that the button is released. Therefore, the level of the key signal is changed from the third level to the fourth level (step S417). In a possible embodiment, the level of the button signal is immediately changed from the third level to the fourth level. In other embodiments, the level of the button signal is changed from the third level to the fourth level after waiting for a second predetermined time.

The invention does not limit the size of the third and fourth levels. In an embodiment, the fourth level is different from the third level. For example, the third level is a high level or a low level, and the fourth level is a low level or a high level. In other embodiments, the fourth level may be equal to the second or first level.

In a possible embodiment, whenever the level of the button signal needs to be changed (eg, changing from the third level to the fourth level or from the fourth level to the first level) The three-level can change the level of the button signal immediately, or wait for a preset time to change the level of the button signal.

Taking Figure 3A as an example, the level of the button signal is immediately changed from a low level to a high level, and immediately changes from a high level to a low level. In Fig. 3B, the level of the button signal is immediately changed from the low level to the high level, but waits for a preset time to change from the high level to the low level. In FIG. 3C, the button signal is changed from the low level to the high level after waiting for a first preset time, and waits for a second preset time to change from the high level to the low level. The first preset time may be equal to, longer or shorter than the second preset time. In the 3D picture, the button signal waits for a preset time to change from the low level to the high level, but immediately changes from the high level to the low level.

In this embodiment, since the level of the button signal is not affected by the jitter level of the button, the host device can be prevented from erroneously thinking that the button has been pressed several times. In addition, when the button is pressed, the level of the button signal is immediately changed, and the host device can immediately react to execute the corresponding service program.

Unless otherwise defined, all terms (including technical and scientific terms) are used in the ordinary meaning Moreover, unless expressly stated, the definition of a vocabulary in a general dictionary should be interpreted as consistent with the meaning of an article in its related art, and should not be interpreted as an ideal state or an overly formal voice.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (10)

An input device includes: a button; and a processing circuit having an input pin and an output pin, the input pin is coupled to the button, and the output pin provides a button signal to a host device, the processing circuit Controlling the level of the button signal according to the level of the input pin; wherein, when the level of the input pin changes from a first level to a second level, after a predetermined time, the processing circuit sets The button signal is at a third level, and during a first masking period, the level change of the input pin is ignored, and the button signal is maintained at the third level. The input device of claim 1, wherein the predetermined time is zero, and when the level of the input pin is changed by the first level, the processing circuit immediately sets the button signal to the third Level. The input device of claim 2, wherein the time interval of the first shielding period is less than a limit of the pressing and releasing interval of the button in operation, and is greater than a switching vibration time of the button. The input device of claim 1, wherein the predetermined time is not zero, and the processing circuit performs an anti-shake processing on the button within the predetermined time. The input device of claim 4, wherein the predetermined time is less than an anti-shake time set by an original specification of the button. The input device of claim 1, wherein after the first shielding period, when the level of the input pin becomes the first level, the The processing circuit sets the button signal to a fourth level. The input device of claim 2, wherein, after the first shielding period, when the level of the input pin returns from the second level to the first level, the processing circuit immediately sets the The button signal is changed from the third level to a fourth level, and during a second masking period, the level change of the input pin is ignored, and the button signal is maintained at the fourth level. The input device of claim 2, wherein after the first shielding period, when the level of the input pin returns from the second level to the first level, the processing circuit waits for a pre- After the time is set, the button signal is changed from the third level to a fourth level, and during a second masking period, the level change of the input pin is ignored, and the button signal is maintained at the fourth Level. A control method for an input device according to any one of claims 1-8, comprising: determining a level change of a button; and changing a level of the button from a first level to a first level After two predetermined times, after a predetermined time, a button signal is set to a third level, and during a first masking period, the level change of the button is ignored, and the button signal is maintained at the third level; And providing the button signal to a host device, and the host device performs a function corresponding to the button according to the button signal. The control method of claim 9, wherein the predetermined time is zero, and when the level of the button is changed by the first level, The processing circuit immediately sets the button signal to the third level; or, the predetermined time is not zero and is less than an anti-shake time set by the original specification of the button, during which the processing circuit performs anti-shake on the button Dynamic processing.