LCD Panel Gray Data Insertion for Image Sticking Reduction
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Solution Overview
Problem
Large-sized digital information displays (DIDs) used for advertisements and information transfer services often experience image sticking issues due to prolonged display of the same image, leading to stress on liquid crystals and residual images on screens, which causes inconvenience to users.
Innovation Solution
An LCD apparatus and method that inserts gray data into sub-pixels based on frame periods and liquid crystal polarity, using a controller to manage voltage application and generate masks for RGB data, ensuring balanced polarity and reducing stress on liquid crystals by alternating gray data insertion patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same image is displayed on the screen for a long period of time, then the advertisement and information transfer services can be effectively provided, but stress is applied to liquid crystals and residual images appear on the screen
Solution Approach 1:
The patent applies periodic action by alternately inserting gray data into sub-pixels at regular intervals (e.g., every other frame or line) rather than continuously. This periodic insertion reduces cumulative stress on liquid crystals while maintaining effective display service, resolving the contradiction between service effectiveness and image quality
Solution Approach 2:
The patent applies local quality by selectively inserting gray data into specific sub-pixels based on their polarity and frame/line position rather than uniformly across all pixels. This targeted approach reduces overall stress on the liquid crystal panel while maintaining display effectiveness, preventing residual images without compromising service quality
2Reliability
If gray data is inserted into all sub-pixels continuously, then stress on liquid crystals is reduced, but image quality deteriorates and display effectiveness decreases
Solution Approach 1:
The patent applies partial action by inserting gray data into only a portion of sub-pixels (those meeting specific polarity and position criteria) rather than all sub-pixels. This partial insertion is sufficient to reduce liquid crystal stress while avoiding excessive gray data insertion that would compromise image quality and display effectiveness
3Reliability
If gray data insertion pattern is changed frequently, then liquid crystal stress is evenly distributed, but control complexity increases
Solution Approach 1:
The patent uses a simple periodic pattern (e.g., alternating frames or lines) for gray data insertion rather than complex frequent changes. This periodic approach evenly distributes stress on liquid crystals while maintaining simple, manageable control logic, resolving the contradiction between stress distribution uniformity and control complexity
Data Source
AI summary
A liquid crystal display (LCD) apparatus and a method of driving the LCD apparatus are provided. The LCD apparatus includes a panel unit including at least one pixel having a plurality of sub-pixels and a controller which inserts gray data into at least one pixel of the plurality of sub-pixels based on a frame period and a polarity of a liquid crystal of the at least one pixel.