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A device for improving the stable operation of liquid crystal equipment

A technology for stable work and equipment, applied in the direction of static indicators, instruments, etc., can solve the problems of loss, integrated circuit damage and economy, and achieve the effects of ensuring safety, ensuring stable work, and protecting from being burned

Active Publication Date: 2020-12-18
NANJING PANDA ELECTRONICS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the core module of the liquid crystal drive device is an integrated circuit solution. Therefore, under the premise of ensuring the normal operation of the liquid crystal drive device, it is necessary to provide a safe and controllable power supply solution to realize the stable operation of the liquid crystal drive device and avoid damage to the integrated circuit. loss

Method used

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  • A device for improving the stable operation of liquid crystal equipment
  • A device for improving the stable operation of liquid crystal equipment
  • A device for improving the stable operation of liquid crystal equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0033] like figure 1 As shown, the device for improving the stable operation of a liquid crystal device proposed by the present invention includes a waveform generating unit, a comparison unit, a driving control unit, an overcurrent and undervoltage protection unit, and a liquid crystal driving unit that are electrically connected in sequence, and a waveform generating unit, a comparison unit, and a driving control unit. The units are respectively connected with the working level VIN, and the output end of the liquid crystal driving unit is connected to the liquid crystal panel unit.

[0034] The waveform generating unit receives the externally input level signal VIN and generates a waveform signal of a certain frequency required by the comparing unit according to the input signal. like Figure 4 As shown, the waveform generating unit includes a connected hysteresis comparator and a resistor-capacitor network. The resistor-capacitor network includes a resistor RK1, a resistor...

Embodiment 2

[0041] like figure 2 Shown is the working sequence requirements of the device during the entire system switching process. In the process of system power-on and power-off, the voltage of the anode terminal of the comparator must be lower than the voltage of the cathode terminal to realize the stable and reliable operation of the system, otherwise it will cause excessive current inside the drive control unit and cause damage, which will lead to the liquid crystal drive unit. Unable to work stably.

[0042] Specifically, during the power-on process of the system, by controlling the resistance value of the resistor R2 and the capacitance value of the capacitor C, the rate of voltage rise on the capacitor C is controlled to ensure the voltage at the anode terminal of the transistor Q (that is, the voltage on the capacitor C) The rate at which the voltage below the cathode terminal (i.e. the triangular wave voltage) changes. In this embodiment, when Vb=7.3V is set, when the syste...

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Abstract

The invention provides a device for improving the stable operation of liquid crystal equipment, which comprises a waveform generation unit, a comparison unit, a driving control unit, an overcurrent and undervoltage protection unit and a liquid crystal driving unit which are electrically connected in sequence, a level signal output end of the liquid crystal driving unit is connected with a liquid crystal panel unit; the output end of the over-current and under-voltage protection unit is further connected with the input end of the drive control unit. The over-current and under-voltage protectionunit comprises a fifth resistor, an operational amplifier, a comparator, a sixth resistor, an NPN type field effect transistor, a first diode and a seventh resistor. In the power-on and power-off processes of the system, the stable and reliable operation of the system can be realized by enabling the anode end voltage of the comparator to be lower than the cathode end voltage, the working state ofsubsequent units is effectively ensured, and the damage of an abnormal state to the system is reduced; safety and stability of the working state of an over-current and under-voltage state system arerealized by adopting a self-adaptive adjustment and control mode, so that the stability of the liquid crystal display driving equipment is improved.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, in particular to a device for improving the stable operation of liquid crystal equipment. Background technique [0002] In the traditional liquid crystal display device, the stability of the operation of the liquid crystal driving device is not high, mainly because the power supply device has the problem of slow charging and fast discharging. Uncertain factors in the charging and discharging process and in the working process are very easy to cause liquid crystal display. The device is damaged, which in turn affects the stability of the LCD device. Therefore, the liquid crystal display device needs a stable power supply scheme for power supply, so as to ensure the normal operation of the display device. At the same time, the core module of the liquid crystal drive device is an integrated circuit solution. Therefore, on the premise of ensuring the normal operation of the liquid cry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G3/3696
Inventor 文博魏伟贾庆生张琛赵星
Owner NANJING PANDA ELECTRONICS MFG
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