TWI431513B - Method for compensating touch signal - Google Patents

Description

Touch signal compensation method

The invention relates to a signal compensation method, and in particular to a method for compensating a touch signal.

With the development of technology, human dependence on electronic devices is increasing. Many of the electronic devices currently on the market operate using a touch panel or a touch pad. Because the current operating system can also be used with a touch screen, the touch screen will become one of the future development trends.

As the number of touch screens on the market is increasing, and the software that conforms to the touch interface is also rapidly increasing, the control signals transmitted from the touch screen are considered to be mouse signals for the operating system. . This is because the touch screen will change the touch signal to the corresponding mouse signal when the touch is received.

However, during this process, the continuity of the mouse signal generated by the touch signal will be worse than the mouse signal generated by the real mouse. Therefore, when using a touch screen, the smoothness of the manipulation interface is affected.

The invention provides a method for compensating a touch signal, and improves the smoothness of the cursor by using the touch signal.

The invention provides a method for compensating a touch signal. Receiving touch During the signal, the touch signal is detected at a fixed time corresponding to the coordinate position of the display unit. Determine whether the current coordinate position is the same as the previous coordinate position. Here, the current coordinate position is the currently detected coordinate position, and the previous coordinate position is the previously detected coordinate position. If the current coordinate position is the same as the previous coordinate position, the signal compensation action is performed. The signal compensation action includes calculating the compensation value and compensating the current coordinate position with the compensation value.

In an embodiment of the present invention, after the step of determining whether the current coordinate position is the same as the previous coordinate position, if the current coordinate position is different from the previous coordinate position, the current coordinate position and the previous coordinate position are calculated. The amount of displacement. Also, record this amount of displacement. In addition, the previous coordinate position is updated to the current coordinate position to re-execute the step of detecting the coordinate position of the touch control signal corresponding to the display unit after a fixed time has elapsed.

In an embodiment of the present invention, in the step of calculating the compensation value, the compensation value may be calculated according to the displacement amount.

In an embodiment of the invention, after the step of compensating the current coordinate position with the compensation value, a compensation number may be accumulated. Moreover, if the current coordinate position is the same as the previous coordinate position, before the step of performing the signal compensation operation, it is possible to detect whether the compensation number is greater than a count value. If the number of compensations is not greater than the count value, the signal compensation action is performed; on the other hand, if the number of compensations is greater than the count value, the signal compensation action is stopped.

Based on the above, the present invention can perform a signal compensation action when the touch signal is discontinuous, so that the touch signal is controlled closer to the mouse signal. It will be smoother to use.

The above described features and advantages of the present invention will be more apparent from the following description.

In general, when the touch signal is discontinuous, the coordinate position of the cursor may stay at the same point. However, in reality, the user's finger may be in a state of being moved all the time. In order to make the operation smoothness of the touch signal closer to the mouse signal, the present invention provides a method for compensating the touch signal, so as to perform a signal compensation action when the touch signal is discontinuous, thereby improving the operation smoothness of the touch signal. .

In general, when a touch unit (such as a touch panel or a touch screen) receives a touch signal, that is, when the user presses the touch unit, the touch signal is converted into a corresponding coordinate position. When the system receives the touch signal, that is, when the user touches the touch unit, the system can issue a mouse down signal. After that, the system starts to compensate the touch signal until the user stops pressing the touch unit. When the user stops pressing the touch unit, the system can issue a mouse up signal to stop compensating the touch signal.

FIG. 1 is a flow chart of a method for compensating a touch signal according to an embodiment of the invention. Referring to FIG. 1 , in step S105 , when the touch signal is received, the touch signal is detected at a fixed time to correspond to the coordinate position of the display unit. In this embodiment, a timer can be used to obtain the coordinate position corresponding to the touch signal every time a fixed period of time elapses.

Next, in step S110, it is determined whether the current coordinate position is the same as the previous coordinate position. Here, the current coordinate position is the currently detected coordinate position, and the previous coordinate position is the previously detected coordinate position.

If the current coordinate position is the same as the previous coordinate position, it indicates that the touch signal may be lost and the touch signal is discontinuous. At this time, as shown in step S115, the signal compensation operation is performed. The signal compensation action includes calculating the compensation value and compensating the current coordinate position with the compensation value. If the current coordinate position is different from the previous coordinate position, it means that the touch signal is not lost, so no signal compensation action is required.

Another embodiment will be described below. 2 is a flow chart of a method for compensating a touch signal according to another embodiment of the invention. In step S205, the touch signal is detected to correspond to the coordinate position of the display unit. Next, in step S210, it is determined whether the current coordinate position is equal to the previous coordinate position.

If the current coordinate position is not equal to the previous coordinate position, the touch signal is not lost. At this time, as shown in step S215, the amount of displacement between the current coordinate position and the previous coordinate position is calculated. For example, subtract the previous coordinate position from the current coordinate position. And, in step S220, the displacement amount is recorded. Further, in step S225, the previous coordinate position is updated to the current coordinate position. At the same time, the number of compensations is reset to zero. Thereafter, after a fixed time has elapsed, step S205 is re-executed.

On the other hand, if the current coordinate position is equal to the previous coordinate position, as shown in step S230, it is detected whether the number of compensation times is greater than the count value. If the number of compensations is greater than the count value, that is, the coordinate position continues to exceed the same point. At a certain time, it can be determined that the coordinate position does not continue to move, and the signal compensation action is no longer performed.

If the number of compensations is still greater than the count value, the signal compensation action is performed, and as shown in step S235, the compensation value is calculated. Thereafter, in step S240, the current coordinate position is compensated with the compensation value. For example, the compensation value can be calculated based on the recorded displacement amount (refer to step S220). Under normal circumstances, since the moving speed of the finger does not have a very sharp difference, and the time when the touch signal is not continuous is not too long, under such an environment, when the touch signal is discontinuous, The previous amount of displacement is used to compensate. In addition, a sensitivity can also be set, and the compensation value is calculated according to the sensitivity. Alternatively, an algorithm can be designed to calculate the compensation value.

For example, suppose the first detected coordinate position A is (Xa, Ya), the second detected coordinate position B is (Xb, Yb), and the third detected coordinate position c is (Xc, Yc). Also, assume that the coordinate position A is not equal to the coordinate position B, and the coordinate position B is equal to the coordinate position C. When the coordinate position B is detected, since the coordinate position A is not equal to the coordinate position B, the displacement amount of the coordinate position A and the coordinate position B, for example, (Xb-Xa, Yb-Ya), is recorded. When the coordinate position C is detected, since the coordinate position C is equal to the coordinate position B, it indicates that the touch signal may be discontinuous at this time, so the coordinate position C is added with the displacement amount to compensate. For example, Xc=Xc+(Xb-Xa), Yc=Yc+(Yb-Ya).

After the current coordinate position is compensated by the compensation value, as shown in step S245, the compensation times are accumulated. This is to determine whether the coordinate position continues to be at the same point for a certain period of time, in order to determine whether the user stops. Press the touch unit. In addition, whenever the user touches the touch unit to generate a touch signal, the relevant data (such as the amount of displacement, the number of compensations, and the compensation value) can be zeroed to recalculate the compensation value.

In summary, the present invention determines whether the touch signal is lost by comparing whether the current coordinate position and the previous coordinate position are the same. If it is judged that the touch signal is lost, the signal compensation action is performed. Moreover, it is determined whether the user actually stops moving and continues to press the touch unit by the number of compensation times. Accordingly, the touch signal can be improved to control the smoothness of the cursor.

Although the present invention has been disclosed in the above 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. The scope of the invention is defined by the scope of the appended claims.

S105~S115‧‧‧ steps of the method for compensating the touch signal of one embodiment of the present invention

S205~S245‧‧‧ steps of the method for compensating the touch signal of another embodiment of the present invention

FIG. 1 is a flow chart of a method for compensating a touch signal according to an embodiment of the invention.

2 is a flow chart of a method for compensating a touch signal according to another embodiment of the invention.

S105~S115‧‧‧ steps of the method for compensating the touch signal of one embodiment of the present invention

Claims (5)

A method for compensating a touch signal includes: detecting a touch position corresponding to a target position of a display unit at a fixed time when receiving a touch signal; determining a current coordinate position and a previous coordinate position Whether the same coordinate position is the currently detected coordinate position, and the previous coordinate position is the coordinate position detected by the previous time; if the current coordinate position is the same as the previous coordinate position, execute one The signal compensation action includes: calculating a compensation value; and compensating the current coordinate position with the compensation value; and calculating the current coordinate position and the previous coordinate position if the current coordinate position is different from the previous coordinate position a displacement amount; recording the displacement amount; and updating the previous coordinate position to the current coordinate position to re-execute detecting the touch signal corresponding to the coordinate position of the display unit after the fixed time step. The method for compensating a touch signal according to claim 2, wherein the calculating the compensation value comprises: calculating the compensation value according to the displacement amount. The method for compensating the touch signal according to claim 1, wherein after the step of compensating the current coordinate position with the compensation value, the method further comprises: accumulating a compensation number. The method for compensating a touch signal according to claim 3, wherein if the current coordinate position is the same as the previous coordinate position, before the step of performing the signal compensation operation, the method further includes: detecting whether the compensation time is More than one count value. The method for compensating the touch signal according to the fourth aspect of the invention, wherein after the step of detecting whether the number of compensation times is greater than the count value, the method further comprises: if the compensation number is not greater than the count value, performing the signal compensation The action; and if the number of compensations is greater than the count value, the signal compensation action is stopped.