CN-224217204-U - Industrial low-temperature-resistant LCD display screen equipment

Abstract

The application relates to an industrial low-temperature-resistant LCD display screen device, which relates to the technical field of LCD display screen devices, and comprises a display driving plate and an LCD display screen arranged on the display driving plate, wherein the display driving plate is electrically connected with the LCD display screen, an inner electric layer heating wire is arranged on the display driving plate and is an elongated wire, a temperature sensor and a heating control circuit electrically connected with the temperature sensor are also arranged on the display driving plate, and the inner electric layer heating wire is controlled to be connected with the heating control circuit. The application has the effect of enabling the LCD to work normally in a low-temperature working environment as much as possible.

Inventors

• LI HONGLIN
• Ning Yanjie

Assignees

• 上海孚因流体动力设备股份有限公司

Dates

Publication Date

20260508

Application Date

20250429

Claims (6)

1. 1. The industrial low-temperature-resistant LCD display screen device is characterized by comprising a display driving plate (1) and an LCD display screen (2) arranged on the display driving plate (1), wherein the display driving plate (1) is electrically connected with the LCD display screen (2), an inner electric layer heating wire is arranged on the display driving plate (1) and is set to be an elongated wire, a temperature sensor (3) and a heating control circuit electrically connected with the temperature sensor (3) are further arranged on the display driving plate (1), and the inner electric layer heating wire is controlled to be connected with the heating control circuit.
2. 2. An industrial low temperature resistant LCD display device according to claim 1, wherein the heating control circuit comprises a window comparing unit (5), a control unit (6) and a power supply V2, wherein the output end of the temperature sensor (3) is electrically connected to the input end of the window comparing unit (5), the output end of the window comparing unit (5) is electrically connected to the control end of the control unit (6), the inner electrical layer heating wire is equivalent to a heating resistor RL, one end of the heating resistor RL is electrically connected to the input end of the control unit (6), the other end of the heating resistor RL is electrically connected to the voltage output end of the power supply V2, and the output end of the control unit (6) is grounded.
3. 3. An LCD display device with industrial low temperature resistance according to claim 2, wherein the window comparing unit (5) comprises an operational amplifier U1, an NMOS transistor Q1 and a PMOS transistor Q2, the voltage output terminal Vtemp of the temperature sensor (3) is electrically connected to the inverting input terminal of the operational amplifier U1 through a resistor R1, the voltage output terminal of the power supply V1 is grounded through a resistor R2, a resistor R3, a resistor R4 and a resistor R5 in sequence, and the junction between the resistor R3 and the resistor R4 is electrically connected to the non-inverting input terminal of the operational amplifier U1, the output terminal of the operational amplifier U1 is electrically connected to the gate of the NMOS transistor Q1 and the gate of the PMOS transistor Q2, the drain of the NMOS transistor Q1 is electrically connected to the voltage output terminal of the power supply V1, the source of the NMOS transistor Q1 is electrically connected to the junction between the resistor R2 and the resistor R3, the junction between the resistor R2 and the drain of the PMOS transistor Q4 is connected to the drain of the output terminal of the window comparing unit (Q2 is connected to the drain terminal of the resistor U5).
4. 4. An LCD display device with industrial low temperature resistance as claimed in claim 2, wherein the control unit (6) comprises a transistor Q3, the output of the window comparison unit (5) is grounded via a resistor R6 and a resistor R7 in sequence, the connection point between the resistor R6 and the resistor R7 is electrically connected to the base of the transistor Q3, the collector of the transistor Q3 is set as the input of the control unit (6), and the emitter of the transistor Q3 is set as the output of the control unit (6).
5. 5. The LCD display device of claim 1, wherein the inner electrical layer heating wire has a serpentine uniform wiring structure.
6. 6. The industrial low temperature resistant LCD display screen device according to claim 1, wherein the LCD display screen (2) device is fixedly connected to the display driving board (1) by welding.

Description

Industrial low-temperature-resistant LCD display screen equipment Technical Field The application relates to the technical field of LCD display screen equipment, in particular to industrial low-temperature-resistant LCD display screen equipment. Background As a core display component of modern electronic devices, LCD displays have been widely used in many fields such as consumer electronics, industrial control, and vehicle-mounted display. The standard operating temperature range is usually designed to be-25 ℃ to +70 ℃, and the range can meet the requirements of most conventional application scenes. However, in extremely cold environments or special industrial application scenarios, when the environmental temperature suddenly drops to-40 ℃ or even lower, the conventional LCD display screen faces serious challenges, namely, performance problems such as significant reduction of response speed, reduction of display contrast and the like can occur, and irreversible physical damage to the liquid crystal material is more likely to occur, which seriously affects the operation reliability of the device and the use experience of an end user. The conventional solution in the industry is to maintain the working temperature of the LCD display screen by using an external heating device, for example, an independent heating film or heating sheet is tightly attached to the back of the LCD display screen, and the necessary temperature guarantee is provided for the LCD display screen by means of electric heating. However, such external temperature control schemes have significant limitations, not only adding additional bulk and weight to the system, but also significantly increasing the manufacturing cost and power consumption of the device, while also facing challenges in terms of system integration and reliability. These factors have limited the range of applications and the potential for LCD displays in extreme environmental conditions to a great extent. Disclosure of utility model In order to enable the LCD to work normally in a low-temperature working environment as much as possible, the application provides an industrial low-temperature-resistant LCD display device. The application provides an industrial low-temperature-resistant LCD display screen device, which adopts the following technical scheme: The industrial low-temperature-resistant LCD display screen device comprises a display driving plate and an LCD display screen arranged on the display driving plate, wherein the display driving plate is electrically connected with the LCD display screen, an inner electric layer heating wire is arranged on the display driving plate and is an elongated wire, a temperature sensor and a heating control circuit electrically connected with the temperature sensor are further arranged on the display driving plate, and the inner electric layer heating wire is controlled to be connected with the heating control circuit. Through adopting above-mentioned technical scheme, the setting of inlayer heating wire can realize the heating to LCD display screen on the display drive board, effectively promotes LCD display screen's working property under low temperature environment. The temperature sensor is used for monitoring the ambient temperature in real time. The temperature control circuit is electrically connected with the temperature sensor, and can dynamically control the heating or stop heating of the inner electric layer heating wire according to the monitored temperature, so that the LCD display screen can normally work in a low-temperature environment, and the low-temperature resistance of the LCD display screen is improved. Preferably, the heating control circuit comprises a window comparison unit, a control unit and a power supply V2, wherein the output end of the temperature sensor is electrically connected to the input end of the window comparison unit, the output end of the window comparison unit is electrically connected to the control end of the control unit, the inner electric layer heating wire is equivalent to a heating resistor RL, one end of the heating resistor RL is electrically connected to the input end of the control unit, the other end of the heating resistor RL is electrically connected to the voltage output end of the power supply V2, and the output end of the control unit is grounded. By adopting the technical scheme, the output of the temperature sensor is monitored through the window comparison unit, heating is ensured to be started only at low temperature, overheating or energy consumption waste is avoided, heating power is dynamically regulated by adopting the control unit, and the power is electrified only when needed, so that the energy efficiency ratio is improved. Preferably, the window comparison unit comprises an operational amplifier U1, an NMOS tube Q1 and a PMOS tube Q2, wherein the voltage output end Vtemp of the temperature sensor is electrically connected to the inverting input end of the operat