Timing Controller Adjusting Refresh Rates for Liquid Crystal Displays
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Solution Overview
Problem
High refresh rate switching in HADS type liquid crystal displays causes image flicker due to brightness differences between refresh rates, resulting from changes in electric field exposure affecting liquid crystal transmittance.
Innovation Solution
A timing controller and reference gray scale voltage generator system that determines and adjusts refresh rates by outputting different control signals, allowing the reference gray scale voltage generator to produce corresponding voltages, ensuring consistent image brightness across refresh rate changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the refresh rate is increased to reduce power consumption, then power consumption is reduced, but image brightness becomes inconsistent causing flicker
Solution Approach 1:
The patent implements dynamic adjustment of gray scale voltages based on the current refresh rate. The timing controller dynamically selects different gray scale voltage groups (first group for first refresh rate, second group for second refresh rate) to compensate for brightness changes, making the system adaptive rather than static
Solution Approach 2:
The patent changes the gray scale voltage parameters according to the refresh rate. When the refresh rate changes, the timing controller adjusts the gray scale voltages applied to the liquid crystal display to maintain consistent brightness, effectively using parameter adjustment to resolve the contradiction
2Use of energy by moving object
If the refresh rate is switched between two rates, then power consumption is reduced, but image flicker occurs due to brightness differences
Solution Approach 1:
The system implements a feedback mechanism where the timing controller monitors the refresh rate and automatically adjusts the gray scale voltages accordingly. This closed-loop control ensures that brightness remains stable across refresh rate transitions, preventing flicker while maintaining power savings
Solution Approach 2:
The patent makes the gray scale voltage selection dynamic based on refresh rate conditions. The timing controller adaptively switches between different gray scale voltage groups to maintain image stability during refresh rate transitions
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 system effectively eliminates image flicker by maintaining consistent brightness across different refresh rates, enhancing display stability and user experience.
Implementation Method 1
liquid crystal molecules oriented in different directions between and above the slit electrodes can both rotate
Implementation Method 2
a multi-dimensional electric field is mainly composed of an electric field generated by edges of slit electrodes in a same plane and a electric field generated by a slit electrode layer and a plate electrode layer
Implementation Method 3
increasing light transmission efficiency
Data Source
AI summary
A timing controller includes a receiver and a processor. The receiver is configured to receive image signals of image frames to be displayed. The processor is configured to determine refresh rates of the image frames to be displayed according to the image signals of the image frames to be displayed, and output different control signals according to different refresh rates of the image frames to be displayed.