Subway dynamic map display terminal with LED backlight system detection function

Abstract

The utility model discloses a subway dynamic map display terminal with an LED backlight system detection function, which belongs to the technical field of display terminals and comprises a power interface board, a power board and a network interface board. The power supply interface board is used for connecting power supply voltage to the power supply board; the power supply board continuously supplies power to the main control board through power supply voltage; the network interface board transmits network signals to the main control board, and the network interface board is in signal intercommunication with an external server. According to the utility model, the backlight output voltage and current signals are monitored in real time, the backlight display of the liquid crystal screen is monitored, the efficiency of finding backlight faults of the liquid crystal screen of the subway dynamic map display terminal is improved, an operator can find the problems in time, and the working efficiency of the operator is improved. And fault problem points displayed by the subway dynamic map display terminal can be checked more conveniently and quickly.

Description

Technical Field

[0001] The utility model belongs to the technical field of display terminals, and particularly relates to a subway dynamic map display terminal with an LED backlight system detection function. Background Art

[0002] At present, when there is a problem with the backlight of the LCD module of the commonly used subway dynamic map display terminal, it is often discovered by passengers or maintenance personnel after the vehicle returns to the depot at night, and there is no effective and quick way to determine the problem point of the display failure. The only way to analyze and determine the problem point is through instruments and equipment, past experience, replacement of related accessories, etc., which is time-consuming and cumbersome.

[0003] Therefore, a new technical solution is urgently needed in the prior art to solve this problem. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a subway dynamic map display terminal with an LED backlight system detection function to solve the problem that the existing technology cannot use effective and quick means, and can only use instruments and equipment, past experience and other methods to analyze and determine the subway dynamic map display terminal failure; and it takes a long time and is cumbersome to operate.

[0005] A subway dynamic map display terminal with an LED backlight system detection function comprises a power interface board, a power board and a network interface board. The power interface board connects the power voltage to the power board; the power board continuously supplies power to a main control board through the power voltage; the network interface board transmits a network signal to the main control board, and the network interface board communicates with external server signals.

[0006] The main control board starts the constant current source through the backlight start signal, transmits the LVDS signal to the liquid crystal screen, performs comprehensive analysis, and transmits the analysis result to the network interface board.

[0007] The constant current source receives the backlight output voltage and current signal of the LCD screen in real time, converts the voltage signal into a digital I2C signal through an analog-to-digital conversion chip, transmits the I2C signal to the main control board, and outputs the backlight signal to the LCD screen.

[0008] Through the above-mentioned design scheme, the utility model can bring the following beneficial effects: by developing a constant current source, adding a circuit for real-time detection of backlight current and voltage, and then converting the voltage signal into a digital I2C signal through an analog-to-digital conversion chip, and transmitting it to the main control board for comprehensive analysis and judgment. When it is identified that the voltage and current values ​​are lower than the set critical values, the main control board will transmit the fault information to the server through the network signal to generate an alarm signal. Real-time monitoring of the backlight output voltage and current signals is achieved, which also realizes the monitoring of the LCD backlight display, and at the same time improves the efficiency of discovering LCD backlight faults of the subway dynamic map display terminal, allowing the operator to discover problems in a timely manner and more conveniently and quickly troubleshoot the display fault problem points of the subway dynamic map display terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0010] Figure 1 The utility model is an electrical scheme diagram of a subway dynamic map display terminal with an LED backlight system detection function. DETAILED DESCRIPTION

[0011] like Figure 1 As shown, a subway dynamic map display terminal with LED backlight system detection function includes a power interface board, a power board and a network interface board. The power interface board connects the power voltage to the power board; the power board continuously supplies power to the main control board through the power voltage; the network interface board transmits the network signal to the main control board, and the network interface board communicates with the external server signal.

[0012] The main control board starts the constant current source through the backlight start signal, and the main control board transmits the LVDS signal to the LCD screen. The main control board performs comprehensive analysis and judgment, and transmits the analysis results to the network interface board. When it is identified that the voltage and current values ​​are lower than the set critical values, the main control board will transmit the fault information to the server through the network signal to generate an alarm signal. The real-time monitoring of the backlight output voltage and current signals is realized, and the monitoring of the LCD screen backlight display is also realized. At the same time, the efficiency of discovering the backlight fault of the LCD screen of the subway dynamic map display terminal is improved, so that the operating personnel can find the problem in time and more conveniently and quickly troubleshoot the display fault problem points of the subway dynamic map display terminal.

[0013] The constant current source receives the backlight output voltage and current signal of the LCD screen in real time, converts the voltage signal into a digital I2C signal through an analog-to-digital conversion chip, transmits the I2C signal to the main control board, and outputs the backlight signal to the LCD screen.

Claims

1. A subway dynamic map display terminal with LED backlight system detection function, characterized by: It includes a power interface board, a power board and a network interface board. The power interface board connects the power voltage to the power board; the power board continuously supplies power to the main control board through the power voltage; the network interface board transmits the network signal to the main control board, and the network interface board communicates with the external server signal; The main control board starts the constant current source through the backlight start signal, transmits the LVDS signal to the LCD screen, performs comprehensive analysis, and transmits the analysis result to the network interface board; The constant current source receives the backlight output voltage and current signal of the LCD screen in real time, converts the voltage signal into a digital I2C signal through an analog-to-digital conversion chip, transmits the I2C signal to the main control board, and outputs the backlight signal to the LCD screen; The constant current source is used to detect the backlight current voltage in real time; The main control board is used to identify the backlight voltage and current values. If the backlight voltage and current values ​​are lower than the set critical values, the main control board transmits the fault information to the server via a network signal, and then the server generates an alarm signal.

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