TWI459273B - A touch screen device with correction function and its correction method - Google Patents

Description

Touch screen device with correction function and correction method thereof

The present invention relates to a touch screen device, and more particularly to a touch correction device for performing recalibration of a capacitance value for a touch panel of a touch screen device and a calibration method thereof.

With the continuous improvement and development of touch technology, touch-based input devices have been widely used in many terminal electronic products, providing superior controllability and a variety of interface operations to replace traditional mouse and keyboard. The function of the input device, thereby saving the operation space and solving the trouble of inconvenience of the peripheral input device.

According to the touch technology, the touch panel has resistance, capacitance, optical or acoustic wave, and the capacitive touch panel is divided into surface capacitance type and projection capacitance type according to different working principles. Projected capacitive touch panels are currently popular in the market and have a high market share. This is because the projected capacitive touch panel has better perspective, more sensitive operation, and higher service life. Etc.

The structure of the projected capacitive touch panel is mainly to form a matrix-shaped sensing circuit with a transparent conductive material in a X-axis and a Y-axis direction on a glass substrate, and to meet each of the X-axis and Y-axis sensing lines. Forming a sensing point with an equivalent electric field, when the finger approaches or touches the sensing point, a change in the capacitance value is generated at the sensing point, so that the touch panel microcontroller can pass through Detecting the position where the capacitance value changes, and then judging and calculating the coordinate point data corresponding to the touch panel on the finger approaching or touching.

However, the disadvantage of the projected capacitive touch panel is that the amount of change in the capacitance value generated when the finger approaches or touches the sensing point is weak, and the touch panel is susceptible to environmental factors, thereby reducing the sensitivity of the touch panel. These influencing factors include temperature or interference from surrounding electromagnetic noise, which makes the touch signal difficult to be detected and interpreted, and may even be misjudged as having the disadvantage of performing touch operation.

At present, the conventional solution is to preload and install a calibration program on a terminal electronic product on which the operating software is installed. When the sensitivity of the touch panel is lowered and it is not easy to operate, it can be displayed on the terminal by finger touch and click. The calibration image on the screen of the electronic product is used to perform a calibration routine to correct the capacitance reference value. Moreover, another conventional solution is to adopt an automatic calibration method, so that during the operation of the touch panel, the detection is performed by setting a fixed detection period, and the touch is determined according to the detection result. Whether the control panel needs to execute the calibration program on the fly.

The conventional solution disclosed above still has some disadvantages, in which the user must first close or remove the windows stacked and displayed on the desktop one by one by touching and clicking the image on the screen desktop. In order to view and touch the calibration image on the desktop, the calibration program can be executed. Therefore, when the sensitivity of the touch panel is actually not good, the user's inconvenience in touch operation will be caused. . Furthermore, with timing detection and automatic calibration, since the calibration program must be executed in the background and continuously detected and calibrated, not only It will consume the memory resources of the terminal electronic products, and will also generate more energy consumption and it is difficult to meet the requirements of environmental protection.

In order to effectively overcome the shortcomings of the prior art implementation of the touch correction program.

To this end, the present invention discloses a touch screen device with a correction function. The touch screen device includes at least: a display screen; and a touch panel stacked on the display screen, the surface of the touch panel has a surface Providing a touch area of the touch operation area and a non-touch area not for the touch operation area, and at least one function key is disposed in the non-touch area, so that a control signal output is generated when the function key is triggered To perform a touch correction function.

In addition, the present invention further discloses a touch screen device with a correction function, comprising at least: a display screen; a touch panel stacked on the display screen for providing touch sensing function, A function button is provided, the function button is triggered to generate a control signal output; a touch correction module is configured to execute a touch correction program; a central processor is respectively connected to the display screen, the touch The control panel, the function key and the touch processing module are configured to receive the control signal and then send a command message to the touch correction module to request the touch correction module to execute the touch correction program and generate At least one correction value; A storage module is electrically connected to the central processor for storing the correction value.

Furthermore, the present invention further discloses a method for correcting a touch screen device, the method comprising: triggering a function button to activate a touch correction program; and performing a touch correction program to calculate a capacitance value of a plurality of sensing points on a touch panel Performing correction, and respectively generating a new correction value; temporarily storing the correction value; determining whether the touch correction program is repeatedly executed to reach a preset number of corrections; if the previous step determines that the preset correction number has been reached, Determining whether the difference value between the temporarily stored correction values exceeds a predetermined threshold value; and if it is determined that the difference value between the temporarily stored correction values does not exceed the preset threshold value, storing and updating the Correction value.

Please refer to FIG. 1 , which is a schematic diagram of the appearance of the touch screen device of the present invention. The touch screen device 1 of the present invention is described by taking an integrally formed multi-function touch computer (All in One PC) as an example, but the present invention is not limited thereto, and the touch screen device may also refer to a touch screen. Laptop or tablet. The touch screen device 1 is composed of a touch panel and a display screen. The touch panel has a touch area 3 for providing a touch operation area and a non-touch area for the touch operation area. Control zone 2, when the finger or conductor is close to or When the touch area 3 is touched, a corresponding touch signal can be generated, and the non-touch area is provided with at least one function key 4. The function key 4 can be selected as a capacitive touch switch according to the structure of the touch screen device 1 or The mechanical switch or the like is implemented in such a manner that when the function key 4 is triggered, an output of the control signal can be generated to perform a touch correction function.

In the following, the selection of the function key 4 is further described. When the present invention is implemented in a touch screen device 1 having no frame design, the non-touch area 2 and the touch area 3 of the touch screen device 1 are formed. The transparent cover of the integrated design, for example, the touch screen of the full-plan design, in this case, the invention can select the capacitive touch switch at any position on the cover surface of the non-touch area 2 And an identification pattern 5 is simultaneously printed on the surface of the capacitive touch switch for easy identification and touch operation by the user. In addition, when the present invention is a touch screen device 1 having a bezel design, for example, when the touch screen is designed with a bezel, the present invention can select a mechanical switch to be implemented in the frame of the non-touch area 2 A position is used for the touch operation, and an identification pattern 5 is also printed on the surface of the mechanical switch.

Please refer to FIG. 2, which is a functional block diagram of the touch screen device of the present invention. As shown in the figure, the touch screen device 1 includes at least a central processing unit 10, a display screen 20, a touch panel 30, a touch processing module 40, a touch correction module 50, and a storage module 60. . The touch processing module 40, the touch correction module 50, the storage module 60, and the display screen 20 are electrically connected to the central processing unit 10, respectively, so as to perform function control and communication through the central processing unit 10. The touch panel 30 is electrically connected to the touch processing module 40 and stacked on the display screen 20.

The touch panel 30 is configured to provide a touch sensing function. When the touch panel 30 detects a touch action, the touch panel 30 can generate a touch signal T1 and output the touch signal to the touch processing module 40. 40, the received touch signal T1 is parsed, a corresponding coordinate point information is obtained through calculation, and transmitted to the central processing unit 10 for subsequent processing, and the central processing unit 10 receives the displayed display information D1. It is passed to the display screen 20, and the display screen 20 is commanded to output the display.

In the embodiment, the touch panel 30 is mainly provided with a function key 32. The function key 32 is electrically connected to the central processing unit 10, and the function key 32 is used to provide a function for the operator to forcibly perform the touch correction of the touch panel 30. When the function key 32 is triggered, a control signal S1 can be generated and output to the central processing unit 10. When the central processing unit 10 determines that the control signal S1 is sent by the function key 32, the central processing unit 10 will issue a command message. The touch correction module 50 is required to perform a touch correction process to update the capacitance reference value of the plurality of sensing points on the touch panel 30 by the execution of the touch correction program. Therefore, the touch panel 30 is improved in sensitivity due to temperature or peripheral electromagnetic noise, and when the touch correction module 50 performs the touch correction process, it can be generated corresponding to each sensing point. A correction value is generated, which will be stored by the output storage module 60 to facilitate updating to a new capacitance reference value.

In this embodiment, the touch correction module 50 can be implemented in one of a software or a hardware manner. When the software module is selected to be implemented in a software manner, the touch correction module 50 can be pre-installed in the form of an application program. The storage module 60 is controlled and executed by the central processing unit 10.

The storage module 60 in this embodiment can be implemented by any of a hard disk, an SSD solid state hard disk, a flash memory, and a dynamic random memory.

Please refer to FIG. 3 , which is a flowchart of a touch correction method of the touch screen device of the present invention. As shown in the figure, in step S101, when the function key is triggered to generate a control signal output to the central processing unit, the central processor will issue a control command, and the touch correction module is required to activate a touch correction program to facilitate the touch. The capacitance value reference value of the control panel is corrected, and the process proceeds to the next step S102.

In step 102, the touch correction module will first send a message requesting to display a warning screen on the display screen, thereby alerting and requiring the operator to keep his hands or other objects away from the surface of the touch panel. Thereby, the static charge carried on the finger or other object of the human body is prevented from affecting the result of the touch correction program execution, and the process proceeds to the next step S103.

In step S103, it is determined whether the display time of the warning screen has passed a preset time length. For example, the preset time length may select a range of 7 to 10 seconds. When the display time reaches the preset time, the process proceeds to the next step S104, otherwise Returning to the previous step S102, it is provided to provide sufficient time for the operator to actually view the message of the above warning screen.

In step S104, the touch correction module starts to execute the touch correction process. The capacitance value of the complex sensing point on the touch panel is corrected. After the calibration is completed, a new correction value is generated according to each sensing point, and the process proceeds to the next step S105.

In step S105, the correction value generated by the touch correction program will be temporarily stored in the storage module in this step, and the process proceeds to the next step S106.

In step S106, the calibration method of the present invention has a judging mechanism for determining whether the touch correction program is repeatedly executed to reach a preset number of corrections, so as to obtain a plurality of correction values for subsequent determination, in the calibration of the present invention. The preset number of corrections is preferably at least 3 times. When the determination result has reached the preset number of corrections, the process proceeds to the next step S107, otherwise, the process returns to step S104 to perform the touch correction process again.

In step S107, it is determined whether the difference value between the temporarily stored correction values exceeds a preset threshold value. If the determination is yes, it may be affected by environmental factors or human errors during the execution of the touch correction program. The influence of the touch causes the current use environment to be unstable, and the correction value generated by the correction will be distorted without reference, so that the process returns to step S104 to re-execute the touch correction process, otherwise the process proceeds to the next step S108.

In step S108, the last temporarily stored correction value is selected as the updated correction value, and stored and updated as the capacitance reference value in the next touch operation.

As can be seen from the above, the present invention is implemented by changing the execution of the touch correction program to a function key triggered by the touch panel, so that the touch surface is When the touch sensitivity of the board is not good, the disadvantage that the touch correction program is not easily executed can be avoided, and the execution process is not affected by various open window blocks on the desktop.

The invention is not intended to limit the invention, and other equivalent modifications or substitutions that are not departing from the spirit of the invention are intended to be included in the appended claims. Within the scope.

1‧‧‧Touch screen device

2‧‧‧ non-touch area

3‧‧‧ touch area

4‧‧‧ function keys

5‧‧‧ images

10‧‧‧Central processor

20‧‧‧ Display screen

30‧‧‧Touch panel

32‧‧‧ function keys

40‧‧‧Touch Processing Module

50‧‧‧Touch Correction Module

60‧‧‧ storage module

Flow chart of S101~S108‧‧‧ touch correction method

FIG. 1 is a schematic view showing the appearance of a touch screen device of the present invention.

FIG. 2 is a functional block diagram of the touch screen device of the present invention.

FIG. 3 is a flow chart of a touch correction method of the touch screen device of the present invention.

1‧‧‧Touch screen device

2‧‧‧ non-touch area

3‧‧‧ touch area

4‧‧‧ function keys

5‧‧‧ Images

Claims (3)

A touch screen device calibration method includes: triggering a function key to activate a touch correction program; performing a touch correction program to correct capacitance values of a plurality of sensing points on a touch panel, and respectively generating a new correction value; temporarily storing the correction value; determining whether the touch correction program is repeatedly executed to reach a preset number of corrections; if the determination result of the previous step has reached the preset number of corrections, determining the temporary corrections Whether the difference value between the values exceeds a preset threshold value; and if it is determined that the difference value between the temporarily stored correction values does not exceed the preset threshold value, the correction value is stored and updated. The method for correcting a touch screen device according to claim 1, wherein the step of initiating a touch correction program further comprises the steps of: displaying a warning screen message on a display screen to alert and request the operator to Keep your hands or other objects away from the surface of the touch panel. The method for correcting a touch screen device as described in claim 2, further comprising the steps of: determining whether the display time of the warning screen has passed a preset time length; and if the determination result is yes, entering the execution of the touch correction program .