Device for improving stable operation of liquid crystal equipment

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

Active Publication Date: 2020-11-03
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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  • Device for improving stable operation of liquid crystal equipment
  • Device for improving stable operation of liquid crystal equipment
  • Device for improving stable operation of liquid crystal equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0034] The waveform generation unit receives the external input level signal VIN and generates a waveform signal of a certain frequency required by the comparison unit according to the input signal. Such as Figure 4 As shown, the waveform generating unit includes a connected hysteresis comparator and a resistance-capacitance network. The resistance-capacitance network includes resistors RK1, RK2, RK3, RK...

Embodiment 2

[0041] Such as image 3 Shown is the working sequence requirement of the device during the whole system power-on and off process. During the power-on and power-off process of the system, the anode terminal voltage of the comparator must be lower than the cathode terminal voltage to achieve stable and reliable operation of the system; Unable to work stably.

[0042] Specifically, during the power-on process of the system, the rate of voltage rise on the capacitor C is controlled by controlling the resistance value of the resistor R2 and the capacitance value of the capacitor C to ensure the voltage at the anode terminal of the transistor Q (that is, the voltage on the capacitor C) Rate of change of voltage below the cathode terminal (i.e. triangular wave voltage). In this embodiment, when Vb=7.3V is set, when the system is powered on, the time for the triangular wave to be established is T1=20ms, and it is necessary to ensure the time for the voltage of Ve to rise to 8v, that...

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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 liquid crystal drive equipment is not high, mainly because the power supply device has the problem of slow charging and fast discharging, and the uncertain factors in the process of charging and discharging and the working process are very easy to cause the liquid crystal display The equipment is damaged, which will affect the stability of the liquid crystal display equipment. 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, under the premise of ensuring the normal operatio...

Claims

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Application Information

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Patent Type & Authority Applications(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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