TWI818455B - Styluses and touch screens that can judge communication quality and methods for judging communication quality - Google Patents

Abstract

A stylus that can judge communication quality performs signal transmission with a touch screen and includes a signal transceiver unit and a processing unit. The processing unit is electrically connected to the signal transceiver unit and performs counting of a service quality parameter, wherein , when the signal transceiver unit receives an uplink signal from the touch screen, the processing unit generates a downlink signal including a service quality parameter, and the signal transceiver unit transmits the downlink signal to the touch screen.

Description

Styluses and touch screens that can judge communication quality and methods for judging communication quality

A stylus and a touch screen, particularly a stylus and a stylus that can judge communication quality, and a method for judging communication quality.

Stylus pens can generally be classified into passive stylus pens or active stylus pens. Since passive stylus pens have conductive properties, when a passive stylus pen contacts a touch screen, the capacitance value of the touch screen will change. , so the touch screen can identify the position where the passive stylus performs a touch operation on the touch screen by determining the position where the capacitance value changes, thereby providing the touch function.

An active stylus transmits wireless touch signals to a touch screen and performs signal transmission with the touch screen, allowing the touch screen to determine the user's operation of an active stylus. The screen can identify the location of the active stylus according to the received wireless touch signal, and then provide the touch function, and because the active stylus and the touch screen receive and transmit wireless touch signals To achieve the touch function, the active stylus can perform touch operations without directly contacting the touch screen to provide a floating touch function.

However, the transmission quality of wireless touch signals is easily affected by factors such as environment and transmission distance. If the signal strength of the wireless touch signal is insufficient due to the long transmission distance, or the signal quality is reduced due to the influence of environmental noise, the The touch screen's interpretation of wireless touch signals is prone to errors, or even signal loss, leading to touch misjudgment. However, the active stylus and the touch screen lack a mechanism to judge communication quality. When an abnormal state occurs, it is often impossible to handle it immediately, resulting in constant misjudgments of touch.

In view of this, the main purpose of the present invention is to provide a stylus, a touch screen and a communication quality judgment method that can judge communication quality, so as to solve the problem that conventional touch screens and stylus pens lack communication quality judgment mechanisms. Instantly determine and improve communication situation shortcomings.

In order to achieve the aforementioned objectives, the present invention provides a stylus that can determine communication quality and transmits signals with a touch screen. The stylus that can determine communication quality includes: a signal transceiver unit; A processing unit is electrically connected to the signal transceiver unit and performs counting of a service quality parameter; Wherein, when the signal transceiver unit receives an uplink signal from the touch screen, the processing unit generates a downlink signal including a service quality parameter, and the signal transceiver unit transmits the downlink signal to the touch screen.

The present invention provides a touch screen that can judge communication quality and transmits signals with a stylus. The touch screen that can judge communication quality includes: a device signal transceiver unit; A device processing unit is electrically connected to the device signal transceiver unit and performs counting of a signal counting parameter, and the device processing unit generates an uplink signal, and the device signal transceiver unit transmits the uplink signal to the stylus; When the device signal transceiver unit receives a downlink signal from the stylus, the device processing unit determines whether the communication quality is normal by comparing the signal count parameter with a value of a service quality parameter in the downlink signal.

The present invention provides a communication quality judgment method, which is executed by a touch screen. The steps include: a1. Clear the count of a signal counting parameter; a2. Generate an uplink signal and transmit it outward; a3. Determine whether the downlink signal is received; a4. After receiving the downward signal, further determine whether the downward signal can be interpreted; a5. When the downlink signal can be interpreted, further determine whether the value of a service quality parameter in the downlink signal is the same as the value of the signal count parameter; a6. When the value of the service quality parameter is the same as the value of the signal counting parameter, it is judged that the communication quality is normal and the count of the signal counting parameter is increased.

The present invention also provides a communication quality judgment method, which is executed by a touch pen. The steps include: b1. Clear the count of a signal loss parameter; b2. Determine whether an uplink signal is received; b3. After receiving the uplink signal, generate a downlink signal and transmit it outward; b4. Determine whether the upward signal can be interpreted; b5. When it is judged that the uplink signal cannot be interpreted, increase the count of the signal loss parameter; b6. When it is judged that the uplink signal can be interpreted, clear the count of the signal loss parameters; b7. Determine whether the value of the signal loss parameter is greater than a signal loss warning value; b8. When it is determined that the value of the signal loss parameter is greater than the signal loss warning value, perform a disposal action; b9. When it is determined that the value of the signal loss parameter is less than or equal to the signal loss warning value, return to step b2.

In the present invention, the touch judgment and operation are completed through the two-way transmission of the uplink signal and the downlink signal between the touch screen that can judge the communication quality and the stylus that can judge the communication quality. The screen can compare the signal count parameter with the service quality parameter in the downlink signal to determine whether the communication quality of the touch screen is normal, and the stylus can adjust the touch screen based on whether the uplink signal can be interpreted. Count the signal loss parameters, and then compare the signal loss parameters with the signal loss warning value to determine whether the communication quality of the stylus is normal, thereby providing a method for judging the communication quality of the touch screen and the stylus. Function, the touch screen and the stylus can instantly judge the communication quality and process it, reducing the occurrence of touch misjudgments caused by abnormal communication quality.

Referring to Figure 1, a stylus 10 that can determine communication quality may include a pen case 11, a signal transceiver unit 13 and a processing unit 14. The pen case 11 has an accommodation space 12; the signal transceiver unit 13 and the processing unit 14 is disposed in the accommodation space 12, the processing unit 14 is electrically connected to the signal transceiver unit 13, and the processing unit 14 can generate a downlink signal D, and the signal transceiver unit 13 converts the downlink signal D is transmitted outward, wherein one end of the pen shell 11 is formed with a pen tip 15, and the pen tip 15 can be provided with a conductive touch pen tip, and the processing unit 14 can be a microcontroller with control, data processing and Functions such as calculation and program execution are used to count a Quality of Service (QoS) parameter and a signal loss parameter, and the processing unit 14 is preset with a signal loss alarm value, and the downlink signal D can Including the service quality parameter and the signal loss parameter, the processing unit 14 can compare the signal loss parameter with the signal loss warning value to determine whether the communication quality is normal. It should be noted that the signal transceiver unit 13 and The processing unit can be disposed at any position in the pen case 11 and is not limited to the drawings and this embodiment.

Referring to FIG. 2 , the touch screen 20 that can determine communication quality may include a touch interface 21 , a device signal transceiver unit 22 and a device processing unit 23 . The touch interface 21 may be disposed on the touch screen. 20; the device signal transceiver unit 22 and the device processing unit 23 can be disposed inside the touch screen 20, and the device processing unit 23 is electrically connected to the touch interface 21 and the device signal transceiver unit 22. The device processing unit 23 can generate an uplink signal U, and the device signal transceiver unit 22 can transmit the uplink signal U to the outside. The device processing unit 23 can be a microcontroller with control, data processing, calculation and program execution, etc. Function, the device processing unit 23 is preset with a communication abnormality alarm value, and the device processing unit 23 can control a signal status parameter of the uplink signal U, and perform counting of a signal counting parameter and a communication abnormality parameter, and the The uplink signal U may include the signal state parameter. On the other hand, when the conductive stylus tip of the stylus 10 contacts the touch interface 21, the device processing unit 23 may calculate the capacitance value of the touch interface 21 according to the capacitance value of the touch interface 21. changes to determine the touch position of the stylus pen 10 .

Figure 3 is a schematic diagram of the application of the touch screen 20 that can determine communication quality and the stylus 10 that can determine communication quality. The communication quality judgment of the present invention will be described in detail below based on the touch screen 20 and the stylus 10. method.

Referring to FIG. 4 , a communication quality judgment method can be executed by the touch screen 20 that can judge communication quality, and includes the following steps:

S101: The device processing unit 23 clears the counting of a signal counting parameter and sets the signal counting parameter to zero, so that the device processing unit 23 starts counting the signal counting parameter from zero.

S102: The device processing unit 23 generates an uplink signal U with a signal judgment parameter in the first state, and transmits it outwardly by the device signal transceiver unit 22. The device processing unit 23 can use the signal judgment parameter in the first state. Switch between the state and the second state. For example, the signal judgment parameter can switch between the bit values 0 and 1. When the signal judgment parameter is in the first state, the bit value of the signal judgment parameter is 0. , and when the signal judgment parameter is in the second state, the bit value of the signal judgment parameter is 1.

S103: The device processing unit 23 determines whether the device signal transceiver unit 22 receives the downlink signal D transmitted by the stylus 10.

S104: When the device processing unit 23 determines that the signal transceiver unit 13 receives the downlink signal D, the device processing unit 23 determines whether the downlink signal D can be interpreted.

S105: When the device processing unit 23 determines that the downlink signal D can be interpreted, the device processing unit 23 generates an uplink signal U whose signal determination parameter is the second state, and the device signal transceiver unit 22 transmits the uplink signal U to external transmission.

S106: The device processing unit 23 determines whether a service quality parameter in the downlink signal D is the same as the value of the signal count parameter.

S107: When the value of the service quality parameter is the same as the value of the signal counting parameter, it is determined that the communication quality is normal, the device processing unit 23 increases the count of the signal counting parameter, and returns to step S103 to receive the next downlink signal D.

S108: When the value of the service quality parameter is different from the value of the signal counting parameter, it is determined that the communication quality is abnormal, and the device processing unit 23 increases the count of the signal counting parameter and a communication abnormality parameter.

S109: The device processing unit 23 determines whether the count of the communication abnormality parameter is greater than a communication abnormality warning value.

S110: When the device processing unit 23 determines that the count of the communication abnormality parameter is greater than the communication abnormality warning value, it determines that the communication quality is abnormal, and performs a processing action to improve the communication quality.

S111: When the device processing unit 23 determines that the count of the communication abnormality parameter is less than or equal to the communication abnormality warning value, it increases the count of the signal counting parameter and proceeds to step S103 to receive the next downlink signal D.

S112: When it is determined that the downlink signal D cannot be interpreted, the uplink signal U whose signal determination parameter is the first state is transmitted outward.

S113: The device processing unit 23 increases the count of the signal counting parameter, and returns to step S103 to receive the next downlink signal D.

The state of the signal judgment parameter is used to determine whether the uplink signal U is generated before the touch screen 20 receives the interpretable downlink signal D or after the touch screen 20 receives the interpretable downlink signal D. The device processing unit 23 generates the signal before the touch screen 20 receives the downlink signal D (step S102), or when the touch screen 20 cannot normally interpret the received downlink signal D (step S109). The judgment parameter is the uplink signal U in the first state; and when the touch screen 20 has received the downlink signal D that can be interpreted normally, the device processing unit 23 generates the signal judgment parameter is the uplink signal in the second state. U.

On the other hand, the signal count parameter represents the number of downlink signals D received by the touch screen 20. Therefore, regardless of whether the device processing unit 23 can normally interpret the downlink signal D, when the touch screen 20 receives the downlink signal D, After the downlink signal D is received, the device processing unit 23 increases the count of the signal count parameter (step S107 and step S110), and the service quality parameter represents which downlink signal D is transmitted by the stylus 10 D. In step S109, the device processing unit 23 can determine whether the number of strokes of the downlink signal D received by the touch screen 20 is consistent with the number of transmissions of the stylus pen 10 based on the comparison of the service quality parameter and the signal count parameter. The number of downlink signals D. When the service quality parameter is different from the signal count parameter, it means that the touch screen 20 has not received the downlink signal D. Therefore, the device processing unit 23 determines that the touch screen 20 has not received the downlink signal D. If the signal transmission between the screen 20 and the stylus 10 is abnormal, a processing action must be performed, wherein the processing action may be to perform frequency hopping synchronization, increase the voltage of the uplink signal U, or increase the voltage of the downlink signal D, etc. Make the touch screen 20 or the stylus 10 achieve signal synchronization, or increase the signal strength of the uplink signal U and the downlink signal D, so as to improve the signal transmission quality between the stylus 10 and the touch screen 20 .

Please refer to Figure 5. On the other hand, another communication quality judgment method can be performed by the stylus 10 that can judge communication quality, which includes the following steps:

S201: The processing unit 14 clears the count of a service quality parameter and a signal loss parameter, which means setting the service quality parameter and the signal loss parameter to zero, so that the processing unit 14 starts executing the service quality parameter and the signal from zero. Count of missing parameters.

S202: The processing unit 14 determines whether the signal transceiver unit 13 receives an uplink signal U transmitted by the touch screen 20.

S203: When the processing unit 14 determines that the signal transceiver unit 13 has received the uplink signal U, the processing unit 14 generates a downlink signal D, and the signal transceiver unit 13 transmits the downlink signal D outward.

S204: The processing unit 14 determines whether the uplink signal U can be interpreted.

S205: When it is determined that the uplink signal U cannot be interpreted, the processing unit 14 increases the count of the signal loss parameter.

S206: The processing unit 14 determines whether the value of the signal loss parameter is greater than a signal loss warning value.

S207: When the processing unit 14 determines that the value of the signal loss parameter is greater than the signal loss warning value, it determines that the communication quality is abnormal and performs a processing action to improve the communication quality.

S208: When the processing unit 14 determines that the value of the signal loss parameter is less than or equal to the signal loss warning value, return to step S202 to determine whether the next uplink signal U is received.

S209: When the processing unit 14 determines that the uplink signal U can be decoded, clear the count of the signal loss parameter, which means setting the signal loss parameter to zero, so that the processing unit 14 starts counting the signal loss parameter from zero.

S210: The processing unit 14 determines whether the signal determination parameter in the uplink signal U is in a second state.

S211: When it is determined that the signal determination parameter in the uplink signal U is in the second state, increase the count of the service quality parameter, and return to step S202 to determine whether the next uplink signal U is received.

S212: When it is determined that the signal determination parameter in the uplink signal U is not in the second state, initialize the count of the service quality parameter, which means adjusting the count of the service quality parameter to an initial value, and return to step S202. Determine whether the next uplink signal U is received.

Among them, the count of the service quality parameter represents the number of the downlink signal D that the stylus 10 has transmitted, and the signal loss warning value is preset in the device processing unit 23. The device processing unit 23 generates a signal loss warning based on the signal loss. Compare the value with the signal loss parameter to determine whether to perform the processing action.

In step S212, when the device processing unit 23 receives the uplink signal U with the signal state parameter being the first state, it means that the touch screen 20 has not received the downlink signal D, or the touch screen 20 cannot Interpreting the received downlink signal D, the device processing unit 23 initializes the service quality parameter and adjusts the count of the service quality parameter to the initial value, so that the next downlink signal generated by the device processing unit 23 is set. The signal D is the first downlink signal D; and when the device processing unit 23 receives the uplink signal U with the signal state parameter being the second state, it means that the touch screen 20 has received the readable downlink signal D. Signal D, therefore the device processing unit 23 increases the count of the service quality parameter.

For example, if the first state of the signal judgment parameter is defined as 0 and the second state is defined as 1, and the touch screen 20 has cleared the count of the signal counting parameter to 0, and the stylus 10 has The count of the service quality parameter is cleared to 0. When the touch screen 20 executes step S102, that means the device processing unit 23 transmits the uplink signal U with the signal determination parameter being 0 via the device signal transceiver unit 22. After the stylus 10 determines that it has received the uplink signal U with the signal determination parameter being 0, the processing unit 14 transmits the downlink signal D with the service quality parameter being 0 via the signal transceiver unit 13 .

In terms of the touch screen 20, the touch screen 20 executes step S103 to determine after receiving the downlink signal D with the service quality parameter being 0, and then executes step S104 to determine whether the downlink signal D can be interpreted. When the device processing unit 23 When it is determined that the downlink signal D cannot be interpreted, the device processing unit 23 also transmits the uplink signal U whose signal judgment parameter is 0 through the device signal transceiver unit 22, and increases the count of the signal count parameter and returns to Step S103; When the device processing unit 23 determines that the downlink signal D can be interpreted, it transmits the first uplink signal U with the signal judgment parameter 1 to the outside through the device signal transceiver unit 22, and proceeds to step S106. At this time, the The service quality parameter of the downlink signal D is 0, and the signal count parameter is 0. Therefore, the device processing unit 23 determines that the service quality parameter is the same as the signal count parameter, that is, increases the count of the signal count parameter and returns to step S103 .

If the service quality parameter is 0, the signal count parameter is 1, the communication abnormality parameter is 1, and the communication abnormality warning value is preset to 1, for example, the device processing unit 23 determines the service quality when executing step S106 The parameter is different from the signal counting parameter, so the count of the communication abnormal parameter is increased, that is, the communication abnormal parameter is set from 1 to 2. The device processing unit 23 further executes step S109, because the communication abnormal parameter is greater than the communication abnormal alarm value. , the device processing unit 23 determines and executes the processing action.

In terms of the stylus 10, after the stylus 10 transmits the downlink signal D, step S204 is executed. When it is determined that the uplink signal U can be interpreted, the processing unit 14 clears the count of the signal loss parameter and executes step S204. S210, when the signal judgment parameter of the uplink signal U is 0 (first state), the processing unit 14 sets the service quality parameter to the initial value, and returns to step 202; and when the signal of the uplink signal U If the judgment parameter is 1 (second state), the processing unit 14 increases the count of the service quality parameter and returns to step 202.

If the processing unit 14 determines that the uplink signal U cannot be interpreted, and the signal loss parameter is 1, and the signal loss warning value is preset to 1, for example, the processing unit 14 increases the count of the signal loss parameter, and The loss parameter is set from 1 to 2. When performing step S206, the processing unit 14 determines that the signal loss parameter 2 is greater than the signal loss warning value 1, and the processing action needs to be performed.

In addition, the signal transceiver unit 13 and the device signal transceiver unit 22 can have different signal reception ranges. For example, the device signal transceiver unit 22 can receive the downlink signal D within the reception distance of the downlink signal D. , the signal transceiver unit 13 can receive the uplink signal U within an uplink signal U receiving distance, and the downlink signal D receiving distance D1 can be greater than the uplink signal U receiving distance D2. Increasing the stylus 10 can receive the uplink signal U. The range of the signal U allows the stylus 10 to transmit the downlink signal D at any time for touch operations, and setting the uplink signal U reception distance shorter than the downlink signal D reception distance prevents the user from simply moving the stylus. 10 When an unintentional touch operation is performed, the generated downlink signal D is received by the touch screen 20, causing a touch misjudgment on the touch screen 20.

In summary, the touch screen 20 that can determine communication quality and the stylus 10 that can determine communication quality of the present invention can complete the touch determination through the transmission of the uplink signal U and the downlink signal D. Operation, and on the one hand, the touch screen 20 can know whether there is a lost signal by comparing the service quality parameter with the value of the signal counting parameter, so as to determine whether the communication quality of the touch screen 20 is normal. On the other hand, the touch screen 20 can determine whether the communication quality of the touch screen 20 is normal. The stylus 10 can know whether there is a lost signal by comparing the signal loss parameter with the signal loss warning value, so as to determine whether the communication quality of the stylus 10 is normal, and execute according to the communication quality judgment result. This processing action immediately handles the problem of abnormal communication quality, thereby providing a mechanism for the stylus 10 or the touch screen 20 to judge the communication quality, and reducing the occurrence of touch misjudgments caused by abnormal communication quality.

10: A stylus that can judge communication quality 11: Pen case 12: Accommodation space 13:Signal transceiver unit 14: Processing unit 15: pen tip 16:Conductive stylus tip 20: Touch screen that can judge communication quality 21:Touch interface 22: Device signal transceiver unit 23:Device processing unit U: uplink signal D: Downward signal D1, D2: receiving distance

Figure 1: Block diagram of the stylus that can judge communication quality according to the present invention. Figure 2: Block diagram of a touch screen capable of judging communication quality according to the present invention. Figure 3: A schematic diagram of a practical application of the touch screen and stylus in the present invention. Figure 4: A flow chart of the communication quality judgment method of the present invention. Figure 5: Another method flow chart of the communication quality judgment method of the present invention.

10: A stylus that can judge communication quality 20: Touch screen that can judge communication quality U: uplink signal D: Downward signal D1, D2: receiving distance

Claims (8)

A stylus that can judge communication quality transmits signals with a touch screen. The stylus that can judge communication quality includes: a signal transceiver unit; a processing unit that is electrically connected to the signal transceiver unit and executes A count of service quality parameters; wherein, when the signal transceiver unit receives an uplink signal from the touch screen, the processing unit generates a downlink signal containing a service quality parameter, and the signal transceiver unit transmits the downlink signal to the Touch screen; wherein, the processing unit adjusts the service quality parameter of the downlink signal according to the state of a signal judgment parameter in the uplink signal; when the signal judgment parameter is in the first state, the processing unit judges that the uplink signal is The touch screen is generated before receiving the interpretable downlink signal. The processing unit initializes the service quality parameter and adjusts the count of the service quality parameter to an initial value; when the signal judgment parameter is in the second state, the processing The unit determines that the uplink signal is generated by the touch screen after receiving the interpretable downlink signal, and the processing unit increases the count of the service quality parameter. As for the stylus that can judge communication quality as described in claim 1, the processing unit performs a counting of signal loss parameters, and has an internal signal loss warning value. When the processing unit cannot interpret the uplink signal, the processing unit The unit increases the count of the signal loss parameter, and when the processing unit determines that the signal loss parameter is greater than the signal loss warning value, a processing action is performed. A touch screen capable of judging communication quality performs signal transmission with a stylus. The touch screen capable of judging communication quality includes: a device signal transceiver unit; A device processing unit is electrically connected to the device signal transceiver unit and performs counting of a signal counting parameter, and the device processing unit generates an uplink signal, and the device signal transceiver unit transmits the uplink signal to the stylus; wherein When the device signal transceiver unit receives a downlink signal from the stylus, the device processing unit determines whether the communication quality is normal by comparing the signal count parameter with a value of a service quality parameter in the downlink signal. As for the touch screen capable of judging communication quality as described in claim 3, the device processing unit performs counting of a communication abnormal parameter. When the signal counting parameter is different from the service quality parameter, the device processing unit determines that the communication quality is abnormal. And increase the count of the communication abnormal parameter; wherein, the device processing unit controls a signal state parameter of the uplink signal and switches the signal judgment parameter between the first state and the second state; the device processing unit is preset with a signal state parameter Communication abnormality warning value. When the device processing unit determines that the count of the communication abnormality parameter is greater than the communication abnormality warning value, it determines that the communication quality is abnormal and performs a processing action. A communication quality judgment method is executed by a touch screen. The steps include: a1. Clear the count of a signal counting parameter; a2. Generate an uplink signal and transmit it outward; a3. Determine whether the downlink signal is received; a4. After receiving the downlink signal, further determine whether the downlink signal can be interpreted; a5. When the downlink signal can be interpreted, further determine whether the value of a service quality parameter in the downlink signal is the same as the value of the signal count parameter; a6. When the value of the service quality parameter is the same as the value of the signal counting parameter, it is judged that the communication quality is normal and the count of the signal counting parameter is increased. According to the communication quality judgment method described in claim 5, when the value of the service quality parameter is different from the value of the signal counting parameter, it is judged that the communication quality is abnormal, and the count of the signal counting parameter and a communication abnormality parameter is increased. According to the communication quality judgment method described in claim 6, the touch screen further determines whether the count of the communication abnormal parameter is greater than a communication abnormal alarm value. When it is determined that the count of the communication abnormal parameter is greater than the communication abnormal alarm value, execute 1. Disposal action; when it is determined that the count of the communication abnormality parameter is less than or equal to the communication abnormality warning value, return to step a3. A method for judging communication quality, executed by a stylus. The steps include: b1. Clear a count of signal loss parameters; b2. Determine whether an uplink signal is received; b3. After receiving the uplink signal, generate a signal containing A downlink signal of service quality parameters is transmitted outward; b4. Determine whether the uplink signal can be decoded; b5. When it is judged that the uplink signal cannot be decoded, increase the count of the signal loss parameters; b6. When it is judged that the uplink signal can be decoded When, clear the count of the signal loss parameter; b7. Determine whether the value of the signal loss parameter is greater than a signal loss warning value; b8. When it is determined that the value of the signal loss parameter is greater than the signal loss warning value, perform a disposal action; b9. When it is determined that the value of the signal loss parameter is less than or equal to the signal loss warning value, return to step b2; b10. Determine the status of the signal judgment parameter in the uplink signal; b11. When it is determined that the signal judgment parameter in the uplink signal is in a first state, the uplink signal is generated before receiving the interpretable downlink signal, initializes the count of the service quality parameter, and adjusts the count of the service quality parameter is an initial value; b12. When it is determined that the signal determination parameter in the uplink signal is in a second state, the uplink signal is generated after receiving the interpretable downlink signal, and the count of the service quality parameter is increased.