Display Apparatus Image-Sticking Elimination via Black Screen Data
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Solution Overview
Problem
Liquid crystal displays (LCDs) experience image-sticking due to residual charges during shutdown, as existing methods, like simultaneous switching of TFT switches by second driver chips, do not ensure complete charge discharge, leading to varying discharging effects and incomplete elimination of charges.
Innovation Solution
A display apparatus with redesigned driver chips, where first driver chips output black screen data when a shutdown signal is initiated, utilizing a timing control chip, power control chip, and an image-sticking elimination module to ensure all scanning lines are switched on, thereby displaying a black screen and facilitating complete charge release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If second driver chips simultaneously switch on TFT switches of all channels during shutting-down, then charges are expected to be released as soon as possible, but discharging effects are different as screen display data is different, so charges cannot be completely eliminated
Solution Approach 1:
The patent applies preliminary action by pre-storing black screen data in a storage module before shutdown occurs. When shutdown signal arrives, the stored black screen data is immediately output to turn on all scanning lines simultaneously, ensuring complete charge elimination. This pre-prepared data eliminates the variability caused by different display content during shutdown.
2Adaptability or versatility
If first driver chips output different data during normal operation, then display content varies, but during shutting-down this causes varying discharging effects
Solution Approach 1:
The patent segments the data output function into two distinct modes: normal operation mode where first driver chips output varying display data, and shutdown mode where a separate storage module outputs uniform black screen data. This segmentation allows the system to maintain display flexibility during operation while ensuring consistent charge discharge during shutdown.
Solution Approach 2:
The storage module acts as an intermediary between the control system and the display output during shutdown. It receives the shutdown signal, retrieves pre-stored black screen data, and outputs this uniform data to all scanning lines, mediating the transition from variable display content to uniform shutdown state, thereby ensuring consistent discharge effects.
Data Source
AI summary
A display apparatus includes a display panel; a timing control chip, connected to the display panel and including an input data temporary storage module, a data processing module, and a data output module; a plurality of first and second driver chips; a power control chip, connected to the timing control chip, the first and the second driver chips, where the power control chip generates a control signal and transmits the control signal to the second driver chips; and an image-sticking elimination module, including a logic detection unit and a storage module, where an end of the storage module is coupled to the logic detection unit, and an other end of the storage module is electrically coupled to the data output module, where the logic detection unit is coupled to the power control chip and receives the control signal, so as to control a working state of the storage module.