Gate Driver Circuit for LCD Residual Voltage Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid crystal display (LCD) devices face issues with residual voltage discharge due to passive elements like resistors and capacitors mounted on the gate driver's output terminal, leading to operation faults and a bulky design that contradicts the trend of lightweight and slimness.
Innovation Solution
A driving circuit is introduced that includes a gate driver capable of outputting both a gate signal and a discharge signal to actively discharge the liquid crystal panel's voltage during a predetermined interval after the supply voltage is shut off, eliminating the need for external passive elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive elements (resistor and capacitor) are mounted on the gate driver output terminal through soldering, then residual voltage can be discharged, but defects due to soldering occur causing operation faults
Solution Approach 1:
The patent merges the discharge function into the gate driver integrated circuit by integrating the discharge transistor and discharge resistor internally. This eliminates the need for separate passive elements and soldering connections, thereby removing the source of manufacturing defects while maintaining the voltage discharge capability.
Solution Approach 2:
The gate driver is designed to automatically discharge residual voltage through its internal discharge transistor and resistor without requiring external passive elements. The gate driver serves its own discharge function, eliminating the need for separate discharge components and their associated soldering connections.
2Reliability
If passive elements are mounted around the gate driver, then residual voltage discharge is achieved, but the area occupied is large contradicting lightweight and slim design trends
Solution Approach 1:
The patent combines the discharge function with the gate driver into a single integrated circuit. The discharge transistor and discharge resistor are integrated internally, eliminating the need for separate passive elements on the PCB and thereby reducing the overall area occupied.
Solution Approach 2:
The gate driver is designed to perform multiple functions: driving the gate lines of the liquid crystal panel and discharging residual voltage. By making the gate driver multi-functional, external passive elements are eliminated, reducing PCB area while maintaining discharge capability.
Data Source
AI summary
An LCD capable of discharging a residual voltage of a panel and a method of driving the same are provided. In the LCD, a gate signal is supplied to the liquid crystal panel during a time interval when a supply voltage is shut off, and a residual voltage is discharged.