Display device with self-checking test function

Abstract

The utility model provides a display device with a self-test function, and belongs to the technical field of self-test display devices. The technical problem to be solved is to provide an improvement of a display device hardware structure with a self-checking test function. According to the technical scheme, a control circuit board, a Hall current collection module and an operational amplification module are arranged in a device shell, a controller and a data communication module are integrated on the control circuit board, and the controller is connected with a touch screen, an LCD liquid crystal screen, keys and the data communication module through wires. The signal input end of the Hall current acquisition module is respectively connected with the touch screen and the power supply module, and the signal output end of the Hall current acquisition module is connected with the controller through the operational amplification module; the power supply input end of the controller is connected with the power supply module; the state self-checking display is applied to the state self-checking display.

Description

Technical Field

[0001] The utility model provides a display device with a self-checking and testing function, belonging to the technical field of self-checking and testing display devices. Background Art

[0002] As a human-computer interaction device, the monitor plays a key role in the use of computers. With the development of the times, the control layer of the monitor has also developed from the original pure hardware control system to a control system that combines software and hardware. When in use, you can not only manually adjust the display effect of the monitor, but also switch the video signal, touch control, and complete display output functions such as graphics, text, and video windowing.

[0003] However, as the internal functions of the display become increasingly rich, higher requirements are placed on the stable operation of the internal controller and corresponding functional modules of the display. As more and more functional modules are installed and used, the failure rate also increases. Especially when transmitting signals between modules for control, the inability to connect an external real-time working status detection device will make it impossible to detect and troubleshoot possible operating failures of the corresponding modules, which reduces the stability and reliability of the display operation and poses a safety hazard. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model aims to solve the technical problem of providing an improvement in the hardware structure of a display device with a self-testing function.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a display device with a self-test function, comprising a device housing, a touch screen and an LCD screen are arranged on the front of the device housing, buttons are arranged on the side of the device housing, and a power module is arranged on the back of the device housing;

[0006] A control circuit board, a Hall current acquisition module, and an operational amplifier module are arranged inside the device housing. The control circuit board is integrated with a controller and a data communication module. The controller is connected to the touch screen, LCD screen, buttons, and data communication module respectively through wires. The signal input end of the Hall current acquisition module is connected to the touch screen and the power module respectively. The signal output end of the Hall current acquisition module is connected to the controller through the operational amplifier module.

[0007] The power input terminal of the controller is connected to the power module;

[0008] The data communication module is connected to the monitoring host via a communication cable.

[0009] The chip used inside the Hall current acquisition module is a conversion chip U1, the model of the conversion chip U1 is CC6902, and the circuit structure of the Hall current acquisition module is:

[0010] Pins 1, 2, 3 and 4 of the conversion chip U1 are all connected to the signal input port of the Hall current acquisition module;

[0011] Pin 5 of the conversion chip U1 is connected in parallel to one end of the capacitor C23 and then grounded;

[0012] Pin 6 of the conversion chip U1 is connected to the other end of the capacitor C23;

[0013] Pin 8 of the conversion chip U1 is connected in parallel to one end of a capacitor C27 and then connected to a 5V input power supply, and the other end of the capacitor C27 is grounded;

[0014] Pin 7 of the conversion chip U1 is connected in series with resistors R21, R23, and R24 in sequence, and then connected to the output port of the Hall current acquisition module.

[0015] The chip used in the operational amplifier module is amplifier U2, the model of the amplifier U2 is SGM8249, and the circuit structure of the operational amplifier module is:

[0016] Pin 1 of the amplifier U2 is connected to the output end of the Hall current acquisition module;

[0017] Pin 3 of the amplifier U2 is connected in parallel to one end of a resistor R28 and one end of a resistor R29 and then connected to pin 5 of the amplifier U2. The other end of the resistor R28 is grounded. The other end of the resistor R29 is connected in series to a resistor R27 and then connected to a 5V input power supply.

[0018] The 8th pin of the amplifier U2 is connected in parallel to the positive electrode of the capacitor C24 and one end of the capacitor C22 and then connected to a 5V input power supply;

[0019] Pin 7 of the amplifier U2 is connected to the signal input terminal of the controller.

[0020] The chip used inside the data communication module is a communication chip U3, and the model of the communication chip U3 is CH9121.

[0021] The beneficial effects of the present invention compared to the prior art are as follows: the present invention improves the circuit structure of the existing display control module, adds a detection module for real-time collection, processing and feedback of the display working signal, adds a self-check mechanism for the working signal at the display hardware layer, and promptly detects and handles potential faults, thereby effectively improving the stability and reliability of the display operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the circuit structure of the utility model;

[0024] Figure 2 This is a circuit diagram of the Hall current acquisition module of the utility model;

[0025] Figure 3 This is a circuit diagram of the operational amplifier module of the utility model;

[0026] Figure 4 This is a circuit diagram of the data communication module of the utility model;

[0027] In the figure: 1 is a touch screen, 2 is an LCD screen, 3 is a button, 4 is a power module, 11 is a Hall current acquisition module, 12 is an operational amplifier module, 13 is a controller, 14 is a data communication module, and 21 is a monitoring host. DETAILED DESCRIPTION

[0028] like Figures 1 to 4 As shown, the utility model provides a display device with a self-test function, specifically relates to a self-test human-computer interaction extension. The device connects a controller with a display screen to realize the display function of DVI input signals and VGA input signals, and supports the control switching of two sets of input signals. When in use, by setting an acquisition module and a communication module, and cooperating with an embedded real-time operating system preset in the controller, the device has the functions of power-on self-test and running self-test and reporting status.

[0029] To achieve the above functions, the display device provided by the utility model includes a device housing, a touch screen 1 and an LCD screen 2 are arranged on the front of the device housing, a button 3 is arranged on the side of the device housing, and a power module 4 is arranged on the back of the device housing;

[0030] A control circuit board, a Hall current acquisition module 11, and an operational amplifier module 12 are arranged inside the device housing. A controller 13 and a data communication module 14 are integrated on the control circuit board. The controller 13 is connected to the touch screen 1, the LCD screen 2, the button 3, and the data communication module 14 through wires. The signal input end of the Hall current acquisition module 11 is connected to the touch screen 1 and the power module 4 respectively. The signal output end of the Hall current acquisition module 11 is connected to the controller 13 through the operational amplifier module 12.

[0031] The power input terminal of the controller 13 is connected to the power module 4;

[0032] The data communication module 14 is connected to the monitoring host 21 via a communication cable.

[0033] The chip used inside the Hall current acquisition module 11 is a conversion chip U1, the model of the conversion chip U1 is CC6902, and the circuit structure of the Hall current acquisition module 11 is:

[0034] Pins 1, 2, 3 and 4 of the conversion chip U1 are all connected to the signal input port of the Hall current acquisition module 11;

[0035] Pin 5 of the conversion chip U1 is connected in parallel to one end of the capacitor C23 and then grounded;

[0036] Pin 6 of the conversion chip U1 is connected to the other end of the capacitor C23;

[0037] Pin 8 of the conversion chip U1 is connected in parallel to one end of a capacitor C27 and then connected to a 5V input power supply, and the other end of the capacitor C27 is grounded;

[0038] Pin 7 of the conversion chip U1 is connected in series with a resistor R21 , a resistor R23 , and a resistor R24 ​​in sequence, and then connected to the output port of the Hall current acquisition module 11 .

[0039] The chip used inside the operational amplifier module 12 is an amplifier U2, the model of the amplifier U2 is SGM8249, and the circuit structure of the operational amplifier module 12 is:

[0040] Pin 1 of the amplifier U2 is connected to the output end of the Hall current acquisition module 11;

[0041] Pin 3 of the amplifier U2 is connected in parallel to one end of a resistor R28 and one end of a resistor R29 and then connected to pin 5 of the amplifier U2. The other end of the resistor R28 is grounded. The other end of the resistor R29 is connected in series to a resistor R27 and then connected to a 5V input power supply.

[0042] The 8th pin of the amplifier U2 is connected in parallel to the positive electrode of the capacitor C24 and one end of the capacitor C22 and then connected to a 5V input power supply;

[0043] Pin 7 of the amplifier U2 is connected to the signal input terminal of the controller 13 .

[0044] The chip used inside the data communication module 14 is a communication chip U3, and the model of the communication chip U3 is CH9121.

[0045] Furthermore, the display device provided by the utility model is provided with a 20.1-inch reinforced touch display with a resolution supporting 1600*1200, a scanning frequency of 60HZ, a matte surface treatment, an RGB vertical strip pixel layout, low power consumption, light weight, meeting the technical index requirements, and cooperating with preset buttons to realize the functions of display output and human-computer control input.

[0046] The control circuit board inside the display device is provided with corresponding control modules, BIT detection modules and power modules. In order to realize the self-test function based on human-computer interaction, multiple BIT test items are firstly set inside the device, and current and voltage collection points are respectively set at the controller, touch screen and power module. BIT information is reported based on the collected current and voltage data, and the indicator light signal and input video signal output by the controller are collected at the same time. Finally, the collected and processed data are uniformly uploaded to the monitoring host for storage through the data communication module, and the monitoring host makes fault judgment and feedback on the detection information.

[0047] When the utility model is in use, the device first performs a self-check when it is turned on. The self-check is to detect the power-on sequence and working status of each module. When the device performs a periodic self-check, it specifically detects whether the signal of each functional module fluctuates.

[0048] When performing signal acquisition, the Hall current acquisition module is used to collect the power supply current of each acquisition point. The CC6902 chip set inside it can convert the current signal into a voltage signal according to 0.4A / V; the converted voltage signal is proportionally calculated by the operational amplifier SGM8249, and the signal is amplified by one time and then collected by the controller GD32 chip; the voltage of each acquisition point is also collected by the controller GD32 chip after passing through the voltage divider circuit; but when the current and voltage fluctuate, it is determined whether it is an erroneous fluctuation based on the current state of the device, and BIT information is sent out.

[0049] The main chip in the controller is MCU, specifically the GD32F103VGT6 chip, which is responsible for AD acquisition of input and output voltage and current signals of each module, and outputs the status of each BIT test item to the monitoring host through the serial port. The data communication module used in the device is specifically a serial port to network port circuit. The main chip in the circuit uses a CH9121 chip, which can package the serial port input signal into a UDP mode data packet for transmission.

[0050] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A display device with a self-test function, comprising a device housing, characterized in that: A touch screen (1) and an LCD screen (2) are arranged on the front of the device housing, buttons (3) are arranged on the side of the device housing, and a power module (4) is arranged on the back of the device housing; A control circuit board, a Hall current acquisition module (11), and an operational amplifier module (12) are arranged inside the housing of the device; a controller (13) and a data communication module (14) are integrated on the control circuit board; the controller (13) is connected to the touch screen (1), the LCD screen (2), the key (3), and the data communication module (14) respectively through wires; a signal input end of the Hall current acquisition module (11) is connected to the touch screen (1) and the power module (4) respectively; and a signal output end of the Hall current acquisition module (11) is connected to the controller (13) through the operational amplifier module (12); The power input terminal of the controller (13) is connected to the power module (4); The data communication module (14) is connected to the monitoring host (21) via a communication cable.

2. A display device with a self-test function according to claim 1, characterized in that: The chip used inside the Hall current acquisition module (11) is a conversion chip U1, the model of the conversion chip U1 is CC6902, and the circuit structure of the Hall current acquisition module (11) is as follows: Pins 1, 2, 3 and 4 of the conversion chip U1 are all connected to the signal input port of the Hall current acquisition module (11); Pin 5 of the conversion chip U1 is connected in parallel to one end of the capacitor C23 and then grounded; Pin 6 of the conversion chip U1 is connected to the other end of the capacitor C23; Pin 8 of the conversion chip U1 is connected in parallel to one end of a capacitor C27 and then connected to a 5V input power supply, and the other end of the capacitor C27 is grounded; Pin 7 of the conversion chip U1 is connected in series with a resistor R21, a resistor R23, and a resistor R24 ​​in sequence, and then connected to the output port of the Hall current acquisition module (11).

3. A display device with a self-test function according to claim 2, characterized in that: The chip used inside the operational amplifier module (12) is an amplifier U2, the model of the amplifier U2 is SGM8249, and the circuit structure of the operational amplifier module (12) is: Pin 1 of the amplifier U2 is connected to the output end of the Hall current acquisition module (11); Pin 3 of the amplifier U2 is connected in parallel to one end of a resistor R28 and one end of a resistor R29 and then connected to pin 5 of the amplifier U2. The other end of the resistor R28 is grounded. The other end of the resistor R29 is connected in series to a resistor R27 and then connected to a 5V input power supply. The 8th pin of the amplifier U2 is connected in parallel to the positive electrode of the capacitor C24 and one end of the capacitor C22 and then connected to a 5V input power supply; Pin 7 of the amplifier U2 is connected to the signal input terminal of the controller (13).

4. A display device with a self-test function according to claim 3, characterized in that: The chip used inside the data communication module (14) is a communication chip U3, and the model of the communication chip U3 is CH9121.

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