PLG Wiring Voltage Compensation for Display Uniformity
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Solution Overview
Problem
Conventional propel link gate (PLG) wirings in flat display devices, such as TFT-LCD and AMOLED, experience significant voltage drops, leading to non-uniformity and potential failure in image display due to impedance, especially in large-sized panels, causing variations in power supply voltages and driving voltages applied to gate lines.
Innovation Solution
A method and device that determine voltage-drop values along PLG wirings and compensate the driving voltages based on these values, using an alternating current-direct current (AC-DC) power supply to ensure consistent driving voltages across all input terminals of the gate driving circuit, thereby reducing the impact of voltage drops and ensuring uniformity in image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PLG wirings are used to transmit signals and power supply signals to gate driving circuits, then the number of PCBs can be reduced, but voltage drops occur along the wirings causing non-uniform driving voltages
Solution Approach 1:
The patent pre-calculates and stores voltage drop values for different electrical connection points along the PLG wiring before operation. During operation, the compensation value is directly retrieved from storage based on the connection point, eliminating the need for real-time calculation and enabling rapid voltage compensation while maintaining uniform driving voltages across all gate driving circuits
Solution Approach 2:
The patent applies voltage compensation by adjusting the driving voltage parameter based on pre-determined voltage drop values. Different connection points receive different compensation values to offset their specific voltage drops, ensuring that all gate driving circuits receive uniform effective driving voltages despite variations in wiring impedance
2Reliability
If compensation voltages are calculated in real-time for each electrical connection point, then voltage uniformity can be improved, but processing time and complexity increase
Solution Approach 1:
The patent performs voltage drop calculations in advance during the design or initialization phase, storing the results in a lookup table. During actual operation, the system simply retrieves the pre-calculated compensation value corresponding to each electrical connection point, reducing processing time from complex real-time calculation to simple table lookup
Solution Approach 2:
The patent creates a copy of voltage drop characteristics for different connection points and stores it in memory. Instead of recalculating voltage drops during operation, the system uses these pre-generated copies (lookup tables) to quickly determine compensation values, significantly reducing processing time while maintaining accuracy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the susceptibility of driving voltages to voltage drops in PLG wirings, ensuring that all input terminals of the gate driving circuit receive substantially the same voltage, thereby preventing non-uniformities and failures in image display, especially for gate lines far from the input terminal of the PLG wiring.
Implementation Method 1
determining a voltage-drop value at an electrical connection point along the PLG wiring with respect to an input terminal of the PLG wiring... and compensating the gate driving voltage on the input terminal of the gate driving circuit based on the voltage-drop value
Data Source
AI summary
The present disclosure provides a method for adjusting gate driving voltages for a gate driving circuit, output terminals of the gate driving circuit being connected with gate lines, an input terminal of the gate driving circuit being connected with a propel link gate (PLG) wiring. The method includes determining a voltage-drop value at an electrical connection point along the PLG wiring with respect to an input terminal of the PLG wiring, the electrical connection point connecting an input terminal of the gate driving circuit with the input terminal of the PLG wiring; and compensating the gate driving voltage on the input terminal of the gate driving circuit based on the voltage-drop value.