LCD Gate Driving Module for Uniform Gate Signal Levels
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Solution Overview
Problem
Liquid crystal display (LCD) apparatuses face deteriorated display quality due to non-uniform levels of gate signals, which affect the transmission of light through the liquid crystal layer, leading to inconsistent image display.
Innovation Solution
A gate driving module is introduced, comprising a gate driver and a gate signal generator that produce uniform gate signals by generating vertical start signals, gate clock signals, and inverse gate clock signals based on specific control signals and voltages, ensuring consistent voltage levels during different durations to improve signal uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gate signals are generated without compensation for timing differences, then the circuit structure remains simple, but the gate signal levels become non-uniform causing display defects
Solution Approach 1:
The patent applies preliminary action by introducing a compensation voltage before the gate signal is fully established. The compensation voltage is applied during a predetermined time period before the gate signal transitions, which compensates for timing differences in advance and ensures uniform gate signal levels across all gate lines without requiring complex real-time adjustment circuits.
2Manufacturing precision
If multiple gate clock control signals with different timings are used, then gate signal uniformity is improved, but the control circuit complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the gate driving process into multiple sequential stages, each controlled by separate gate clock control signals. The gate driver circuit generates multiple gate clock signals with different timings corresponding to different gate lines, and processes them in segmented stages. This allows precise control of each gate signal while maintaining a relatively simple overall circuit structure through modular stage-based processing.
Data Source
AI summary
A gate driving module includes a gate driver and a gate signal generator. The gate driver generates a vertical start signal, a plurality of gate clock signals and a plurality of inverse gate clock signals based on a vertical start control signal, a plurality of gate clock control signals, a gate on voltage, a first gate off voltage and a second gate off voltage. The number of the gate clock signals is P. The number of the inverse gate clock signals is P. The number of the gate clock control signals is P. P is a positive integer equal to or greater than two. The gate signal generator generates a gate signal based on the vertical start signal, the gate clock signals and the inverse gate clock signals.