Firmware upgrading device for capacitive touch screen

Abstract

The utility model discloses a capacitive touch screen firmware upgrading device, which comprises a control host, a human-computer interface operation module, a touch screen PCB bearing substrate and a test probe, and is characterized in that the control host is sequentially connected with the human-computer interface operation module, the touch screen PCB bearing substrate and the test probe; the human-computer interface operation module comprises a display screen; the touch screen PCB bearing substrate comprises a test bonding pad, and the touch screen PCB bearing substrate is used for bearing a touch screen to be tested; the control host is connected with a manipulator for aligning and contacting the test probe and the test bonding pad; the control host is used for sending touch screen test data and obtaining feedback data when the touch screen firmware is upgraded, and comparing the touch screen test data with the feedback data to obtain touch screen firmware comparison data; the control host outputs a power switch control signal to control the connection and disconnection of a power supply between the touch screen to be tested and the touch screen PCB bearing substrate; the firmware upgrading efficiency of the capacitive touch screen and the product quality of the capacitive touch screen are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of touch screen testing, in particular to a capacitive touch screen firmware upgrading device. BACKGROUND

[0002] Before capacitive touch screens are shipped, the touch screen firmware needs to be burned first, and then relevant function tests are performed; currently, touch screen manufacturers burn the touch screen firmware mainly in a manual operation mode, and need to use a computer to perform touch screen firmware upgrading through host computer software; this firmware upgrading mode is low in production efficiency, is not conducive to mass production, and is poor in consistency of manual operation, and is prone to problems such as missed upgrading, firmware upgrading errors and the like, and needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] In order to improve the capacitive touch screen firmware upgrading efficiency and improve the capacitive touch screen product quality, the application provides a capacitive touch screen firmware upgrading device.

[0004] The capacitive touch screen firmware upgrading device provided by the application adopts the following technical scheme:

[0005] The capacitive touch screen firmware upgrading device comprises a control host, a man-machine interface operation module, a touch screen PCB bearing substrate and a test probe, the control host is connected with the man-machine interface operation module, the touch screen PCB bearing substrate and the test probe in sequence.

[0006] The man-machine interface operation module comprises a display screen; the touch screen PCB bearing substrate comprises a test pad, and the touch screen PCB bearing substrate is used for bearing a touch screen to be tested; the control host is connected with a robot hand used for aligning and contacting the test probe and the test pad; the control host is connected with an integrated bus interface used for touch screen firmware upgrading, the control host is used for sending touch screen test data and obtaining feedback data of the touch screen firmware when the touch screen firmware is upgraded, comparing the touch screen test data and the feedback data to obtain touch screen firmware comparison data; and the control host outputs a power switch control signal to control the power connection and shutdown of the touch screen to be tested and the touch screen PCB bearing substrate.

[0007] By adopting the technical scheme, the accuracy of the capacitive touch screen firmware upgrading process is high, the intelligent degree is high, and the production efficiency of the capacitive touch screen firmware upgrading is improved. The touch screen firmware upgrading process adopts the automatic production mode of the control host and the mechanical arm, reduces manual operation, effectively avoids the static shock caused by manual operation, greatly improves the production efficiency, reduces the secondary pollution of the touch screen, and improves the product quality of the capacitive touch screen. Specifically, the capacitive touch screen firmware upgrading production process comprises the following steps: (1) mounting the touch screen to be tested on the touch screen PCB bearing substrate; (2) controlling the host to combine the mechanical arm to align the test probe to the test pad, so that the test probe and the test pad are in full contact; (3) the control host opens the power supply on the touch screen PCB bearing substrate through the communication interface; (4) the control host upgrades the touch screen firmware through the integrated bus interface and detects the touch voltage and current in real time; (5) the control host reads the touch screen firmware through the integrated bus interface, and compares the read feedback data and the sent touch screen test data one by one. If the data is consistent, the mechanical arm is moved to the next touch screen test pad position, and the test of the next touch screen is continued. If the data is inconsistent, the touch screen firmware is repeatedly sent until the read data (feedback data) and the sent data (touch screen test data) are consistent; after the test of each touch screen is completed, the control host disconnects the power supply on the touch screen PCB bearing substrate, and then the power supply on the touch screen PCB bearing substrate is turned on again after the test probe and the test pad of the next touch screen are in full contact, so as to ensure the reliability of the test, thereby improving the capacitive touch screen firmware upgrading efficiency and the capacitive touch screen product quality.

[0008] Preferably, the voltage detection module and the current detection module are further included. The voltage detection module detects the touch voltage of the touch screen firmware in real time to obtain a real-time voltage signal. The current detection module detects the touch current of the touch screen firmware in real time to obtain a real-time current signal. The current detection module is provided with a current threshold signal and a current control switch unit. The control host compares the real-time current signal with the current threshold signal to obtain a first comparison signal and a second comparison signal and output them to the current control switch unit. The current control switch unit outputs an opening signal when receiving the first comparison signal. The current control switch unit outputs a closing signal to the touch screen PCB bearing substrate when receiving the second comparison signal to control the power supply of the touch screen PCB bearing substrate to be turned off.

[0009] By adopting the technical scheme, the security of the firmware upgrade is improved, that is, by detecting the touch voltage and current of the touch screen firmware in real time, any abnormal voltage or current fluctuation can be found and responded in time, which helps to prevent the device damage or data loss caused by excessive current or unstable voltage during the touch screen firmware upgrade, thereby significantly improving the security of the firmware upgrade, and the current threshold signal and the current control switch unit are arranged to achieve the purpose of accurately controlling the power state of the touch screen PCB bearing substrate, which not only helps to protect the device from current impact, but also quickly cuts off the power when necessary to prevent potential safety hazards.

[0010] Preferably, the integrated bus interface comprises an I2C interface, and the test probe adopts a double-row probe design.

[0011] By adopting the technical scheme, the I2C interface supports bidirectional communication, that is, the master device can send data to the slave device, and the slave device can also send data to the master device, so that the data transmission is more flexible and efficient, and the test probe adopts a double-row probe design, which enhances the conductivity of the probe and the test pad and has high reliability.

[0012] Preferably, the test device further comprises a buzzer alarm module, the buzzer alarm module comprises a buzzer and an alarm switch tube, the buzzer is connected with the emitter of the alarm switch tube, and the base of the alarm switch tube is connected with the control host.

[0013] By adopting the technical scheme, the alarm switch tube is used for controlling the buzzer to start and stop, so that when the voltage and current of the touch screen are found to be abnormal, the buzzer alarm sound is triggered, and the substrate power is automatically cut off, at this time, manual confirmation of the abnormal condition is required before the test is continued, thereby improving the production safety.

[0014] Preferably, the voltage detection module comprises a first voltage dividing resistor, a second voltage dividing resistor and a first capacitor, the first voltage dividing resistor and the second voltage dividing resistor are connected in series, the first voltage dividing resistor and the first capacitor are connected in parallel, and the ADC pin of the control host is connected to the connection node of the first voltage dividing resistor and the second voltage dividing resistor.

[0015] By adopting the technical scheme, the control host detects the voltage of the touch screen through the ADC pin.

[0016] Preferably, the current control switch unit comprises a current control switch tube, the current detection module further comprises an operational comparator, a first shunt resistor, a second shunt resistor and a third shunt resistor; the source of the current control switch tube is connected with the first shunt resistor and then grounded, the second shunt resistor and the third shunt resistor are connected in series, the other end of the second shunt resistor is grounded, the other end of the third shunt resistor is connected with the output end of the operational comparator, the positive phase input end of the operational comparator is connected with the source of the current control switch tube, and the negative phase input end of the operational comparator is connected with the connection node of the second shunt resistor and the third shunt resistor.

[0017] By adopting the technical scheme, the current of the touch screen being tested is detected in real time during the touch screen test, and the power supply of the touch screen PCB carrying substrate is cut off by the current control switch tube when the current is detected to be abnormal.

[0018] Preferably, the control host is further connected with an LED light indication module, the LED light indication module comprises a first indication light, a second indication light and a third indication light for indicating the power supply state, and the indication signals of the first indication light, the second indication light and the third indication light are different.

[0019] By adopting the technical scheme, the first indication light, the second indication light and the third indication light are used for indicating the power supply state of the power supply of the touch screen PCB carrying substrate.

[0020] Preferably, the touch screen PCB carrying substrate further comprises a touch screen connector, a touch screen FPC and a touch screen fixing block, one end of the touch screen connector is connected with the test pad, the other end of the touch screen connector is connected with the touch screen FPC, and the touch screen fixing block is provided with a plurality of fixing blocks and forms a placement area for placing the touch screen to be tested.

[0021] By adopting the technical scheme, the touch screen connector, the FPC (flexible flat cable) and the fixing block are integrated on the PCB carrying substrate, the rapid installation and disassembly of the touch screen are realized, the physical connection step in the firmware upgrade process is greatly simplified, the upgrade period is shortened, and the upgrade efficiency is improved; the design of the touch screen connector ensures the stable connection between the test pad and the touch screen FPC.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. The accuracy of the capacitive touch screen firmware upgrade process of the application is high, the intelligent degree is high, and the production efficiency of the capacitive touch screen firmware upgrade is improved. The touch screen firmware upgrade process adopts the mode of automatic production of control host and mechanical arm, reduces manual operation, effectively avoids static shock caused by manual operation, greatly improves production efficiency, reduces secondary pollution of touch screen and other problems, and is beneficial to improve the quality of capacitive touch screen products;

[0024] 2. The safety of firmware upgrade is improved, that is, by detecting the touch voltage and current of the touch screen firmware in real time, any abnormal voltage or current fluctuation can be found and responded in time; it is helpful to prevent equipment damage or data loss caused by excessive current or unstable voltage during touch screen firmware upgrade, thereby significantly improving the safety of firmware upgrade; The current threshold signal and current control switch unit are set to achieve the purpose of accurately controlling the power state of the touch screen PCB carrier substrate; Such accurate control not only helps to protect the equipment from current impact, but also can quickly cut off the power supply when necessary to prevent potential safety hazards;

[0025] 3. The application integrates the touch screen connector, FPC (Flexible Flat Cable) and fixed block on the PCB carrier substrate, realizes the rapid installation and disassembly of the touch screen, greatly simplifies the physical connection step in the firmware upgrade process, shortens the upgrade cycle and improves the upgrade efficiency; The design of the touch screen connector ensures the stable connection between the test pad and the touch screen FPC. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of a capacitive touch screen firmware upgrade device according to an embodiment of the application.

[0027] Figure 2 is a circuit diagram of a voltage detection module, a current detection module, a buzzer alarm module and an LED lamp indication module in a capacitive touch screen firmware upgrade device according to an embodiment of the application.

[0028] BRIEF DESCRIPTION OF DRAWINGS:

[0029] 1. Touch screen PCB carrier substrate; 11, test pad; 12, touch screen connector; 13, touch screen fixed block; 2, test probe; 3, voltage detection module; 4, current detection module; 5, buzzer alarm module; 6, LED lamp indication module. DETAILED DESCRIPTION

[0030] The following will be described in detail in combination with the accompanying Figures 1-2 The application will be further described in detail.

[0031] An embodiment of the application discloses a capacitive touch screen firmware upgrade device. Referring to Figure 1The capacitive touch screen firmware upgrading device comprises a control host, a man-machine interface operation module, a touch screen PCB bearing substrate 1 and a test probe 2. The control host comprises a single-chip microcomputer (not shown in the figure). The control host is connected with the man-machine interface operation module, the touch screen PCB bearing substrate 1 and the test probe 2 in sequence. The man-machine interface operation module comprises a display screen (not shown in the figure) and a man-machine interface interface. The touch screen PCB bearing substrate 1 comprises a test pad 11. The touch screen PCB bearing substrate 1 is used for bearing the touch screen to be tested. The control host is connected with a robot (not shown in the figure) used for aligning and contacting the test probe 2 with the test pad 11. The control host is connected with an integrated bus interface used for upgrading the touch screen firmware. The integrated bus interface comprises an I2C interface. The test probe 2 adopts a double-row probe design. The control host is used for sending touch screen test data and obtaining feedback data of the touch screen firmware when upgrading the touch screen firmware. The touch screen test data and the feedback data are compared to obtain touch screen firmware comparison data. The control host outputs a power switch control signal to control the power connection and shutdown of the touch screen to be tested and the touch screen PCB bearing substrate 1.

[0032] Specifically, the capacitive touch screen firmware upgrading production process comprises the following steps: (1) installing the touch screen to be tested on the touch screen PCB bearing substrate 1; (2) controlling the control robot to align the test probe 2 with the test pad 11 so that the test probe 2 and the test pad 11 are in full contact; (3) the control host opens the power supply on the touch screen PCB bearing substrate 1 through the communication interface; (4) the control host upgrades the touch screen firmware through the integrated bus interface and detects the touch voltage and current in real time; (5) the control host reads back the touch screen firmware through the integrated bus interface and compares the read back feedback data and the sent touch screen test data one by one. If the data is consistent, the control robot moves to the position of the next touch screen test pad 11 to continue testing the next touch screen. If the data is inconsistent, the touch screen firmware is repeatedly sent until the read back data (feedback data) and the sent data (touch screen test data) are consistent. After the test of each touch screen is completed, the control host shuts down the power supply on the touch screen PCB bearing substrate 1. After the test probe 2 and the test pad 11 of the next touch screen are in full contact, the power supply on the touch screen PCB bearing substrate 1 is turned on again to ensure the reliability of the test, thereby improving the capacitive touch screen firmware upgrading efficiency and the capacitive touch screen product quality.

[0033] Reference Figure 1The touchscreen PCB carrier substrate 1 also includes a touchscreen connector 12, a touchscreen FPC, and touchscreen fixing blocks 13. One end of the touchscreen connector 12 is connected to the test pad 11, and the other end of the touchscreen connector 12 is connected to the touchscreen FPC. The touchscreen fixing blocks 13 are provided in multiple ways and form a placement area for placing the touchscreen to be tested. In this embodiment, one touchscreen PCB carrier substrate 1 is connected to four touchscreen fixing blocks 13, and the four touchscreen fixing blocks 13 form a rectangular frame.

[0034] Reference Figure 2 ,by Figure 2 Taking the circuit diagram shown as an example, the capacitive touch screen firmware upgrade device also includes a voltage detection module 3 and a current detection module 4. The voltage detection module 3 detects the touch voltage of the touch screen firmware in real time and obtains a real-time voltage signal; the current detection module 4 detects the touch current of the touch screen firmware in real time and obtains a real-time current signal; the current detection module 4 is equipped with a current threshold signal and a current control switch unit. The control host compares the real-time current signal with the current threshold signal to obtain a first comparison signal and a second comparison signal and outputs them to the current control switch unit. When the current control switch unit receives the first comparison signal, it outputs an on signal. When the current control switch unit receives the second comparison signal, it outputs a off signal to the touch screen PCB carrier substrate 1 to control the power supply of the touch screen PCB carrier substrate 1 to be turned off.

[0035] Reference Figure 2 The voltage detection module 3 includes a first voltage divider resistor R1, a second voltage divider resistor R2, and a first capacitor C1. The first voltage divider resistor R1 and the second voltage divider resistor R2 are connected in series, and the first voltage divider resistor R1 and the first capacitor C1 are connected in parallel. The ADC pin of the control host is connected to the connection node of the first voltage divider resistor R1 and the second voltage divider resistor R2. The current control switch unit includes a current control switch transistor Q1. The current detection module 4 also includes an operational comparator U1, a first shunt resistor R3, a second shunt resistor R4, and a third shunt resistor R5. The source of the current control switch transistor Q1 is connected to the first shunt resistor R3 and then grounded. The second shunt resistor R4 and the third shunt resistor R5 are connected in series. The other end of the second shunt resistor R4 is grounded. The other end of the third shunt resistor R5 is connected to the output terminal of the operational comparator U1. The non-inverting input terminal of the operational comparator U1 is connected to the source of the current control switch transistor Q1, and the inverting input terminal of the operational comparator U1 is connected to the connection node of the second shunt resistor R4 and the third shunt resistor R5.

[0036] Reference Figure 2 ,by Figure 2The circuit diagram shown is an example, the capacitive touch screen firmware upgrade device further comprises a buzzer alarm module 5 and an LED lamp indication module 6 connected with the control host, the buzzer alarm module 5 comprises a buzzer and an alarm switch tube Q2, the buzzer is connected with the emitter of the alarm switch tube Q2, the base of the alarm switch tube Q2 is connected with the control host; the LED lamp indication module 6 comprises a first indication lamp LED1, a second indication lamp LED2 and a third indication lamp LED3 for indicating the power supply state, the indication signals of the first indication lamp LED1, the second indication lamp LED2 and the third indication lamp LED3 are different.

[0037] The implementation principle of the capacitive touch screen firmware upgrade device of the embodiment of the present application is: the accuracy of the capacitive touch screen firmware upgrade process of the present application is high, the intelligent degree is high, and it is beneficial to improve the production efficiency of the capacitive touch screen firmware upgrade, the touch screen firmware upgrade process adopts the automatic production mode of the control host and the mechanical hand, reduces manual operation, effectively avoids the static electricity injury caused by manual operation, greatly improves the production efficiency, reduces the secondary pollution of the touch screen and other problems, and is beneficial to improve the product quality of the capacitive touch screen.

[0038] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A capacitive touchscreen firmware upgrade device, characterized in that, It includes a control host, a human-machine interface operation module, a touch screen PCB carrier substrate (1) and a test probe (2), wherein the control host is connected in sequence to the human-machine interface operation module, the touch screen PCB carrier substrate (1) and the test probe (2); The human-machine interface operation module includes a display screen; the touch screen PCB carrier substrate (1) includes test pads (11), and the touch screen PCB carrier substrate (1) is used to support the touch screen to be tested; the control host is connected to a robotic arm for aligning and contacting the test probe (2) with the test pads (11); the control host is connected to an integrated bus interface for upgrading the touch screen firmware, and the control host is used to send touch screen test data and obtain feedback data of the touch screen firmware when upgrading the touch screen firmware, compare the touch screen test data with the feedback data to obtain touch screen firmware comparison data; the control host outputs a power switch control signal to control the power connection and shutdown of the touch screen to be tested and the touch screen PCB carrier substrate (1).

2. The capacitive touchscreen firmware upgrade device according to claim 1, characterized in that, It also includes a voltage detection module (3) and a current detection module (4). The voltage detection module (3) detects the touch voltage of the touch screen firmware in real time to obtain a real-time voltage signal; the current detection module (4) detects the touch current of the touch screen firmware in real time to obtain a real-time current signal. The current detection module (4) is equipped with a current threshold signal and a current control switch unit. The control host compares the real-time current signal with the current threshold signal to obtain a first comparison signal and a second comparison signal, and outputs them to the current control switch unit. When the current control switch unit receives the first comparison signal, it outputs an on signal. When the current control switch unit receives the second comparison signal, it outputs a off signal to the touch screen PCB carrier substrate (1) to control the power supply of the touch screen PCB carrier substrate (1) to be turned off.

3. The capacitive touchscreen firmware upgrade device according to claim 1, characterized in that, The integrated bus interface includes an I2C interface, and the test probe (2) adopts a dual-row probe design.

4. The capacitive touchscreen firmware upgrade device according to claim 1, characterized in that, It also includes a buzzer alarm module (5), which includes a buzzer and an alarm switch tube. The buzzer is connected to the emitter of the alarm switch tube, and the base of the alarm switch tube is connected to the control host.

5. A capacitive touchscreen firmware upgrade device according to claim 2, characterized in that, The voltage detection module (3) includes a first voltage divider resistor, a second voltage divider resistor and a first capacitor. The first voltage divider resistor and the second voltage divider resistor are connected in series, and the first voltage divider resistor and the first capacitor are connected in parallel. The ADC pin of the control host is connected to the connection node of the first voltage divider resistor and the second voltage divider resistor.

6. A capacitive touchscreen firmware upgrade device according to claim 2, characterized in that, The current control switch unit includes a current control switch tube, and the current detection module (4) further includes an operational comparator, a first shunt resistor, a second shunt resistor and a third shunt resistor; The source of the current-controlled switch is connected to the first shunt resistor and then grounded. The second and third shunt resistors are connected in series. The other end of the second shunt resistor is grounded. The other end of the third shunt resistor is connected to the output of the operational comparator. The non-inverting input of the operational comparator is connected to the source of the current-controlled switch. The inverting input of the operational comparator is connected to the connection node of the second and third shunt resistors.

7. A capacitive touchscreen firmware upgrade device according to claim 1, characterized in that, It also includes an LED indicator module (6) connected to the control host. The LED indicator module (6) includes a first indicator light, a second indicator light, and a third indicator light that indicate the power status. The indicator signals of the first indicator light, the second indicator light, and the third indicator light are different.

8. A capacitive touchscreen firmware upgrade device according to claim 1, characterized in that, The touch screen PCB carrier substrate (1) also includes a touch screen connector (12), a touch screen FPC and a touch screen fixing block (13). One end of the touch screen connector (12) is connected to the test pad (11) and the other end of the touch screen connector (12) is connected to the touch screen FPC. The touch screen fixing block (13) is provided with multiple blocks and forms a placement area for placing the touch screen to be tested.

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