Display Panel Driving Sequence for Idle-State Luminance Compensation
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Solution Overview
Problem
Display devices experience luminance variations (screen stains or line/block-shaped stains) due to distortion of threshold voltage information when left idle for extended periods, leading to compensation inaccuracies and reliability issues.
Innovation Solution
A display device and method that includes driving preparation, driving waiting compensation, and normal driving stages, with sensing flags to manage threshold voltage compensation, ensuring accurate and reliable luminance adjustment even after prolonged idle periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the display device is left idle for extended periods without driving, then power consumption is reduced, but threshold voltage information becomes distorted causing luminance variation
Solution Approach 1:
The patent applies preliminary action by performing compensation for threshold voltage distortion during the idle period before normal display operation resumes. The controller executes compensation routines that sense gate line voltages and adjust threshold voltage information while the display is in a waiting state, thereby preventing luminance variation from occurring when the display becomes active again.
2Reliability
If threshold voltage compensation is performed continuously, then luminance uniformity is maintained, but processing time and system complexity increase
Solution Approach 1:
The patent implements periodic action by scheduling threshold voltage compensation to occur at specific intervals or under specific conditions rather than continuously. The controller monitors the idle state duration and triggers compensation routines periodically or when threshold voltage distortion is detected, thereby maintaining luminance uniformity while minimizing unnecessary processing time consumption.
3Measurement precision
If threshold voltage compensation is performed frequently, then compensation accuracy is improved, but device complexity and operation overhead increase
Solution Approach 1:
The patent applies feedback by implementing a monitoring mechanism that detects threshold voltage distortion levels and adjusts compensation frequency accordingly. The controller senses gate line voltages and determines whether compensation is needed based on detected distortion, thereby achieving high compensation accuracy when necessary while reducing operation overhead when distortion is minimal or absent.
Data Source
AI summary
A display device is disclosed. The display device includes a display module including a display panel configured to display an image, a driver configured to drive the display panel, and a timing controller configured to control the driver, and a power supply configured to supply power for driving of the display module. The display module operates in an order of driving preparation configured to operate a basic configuration required for an operation of a device, driving waiting compensation configured to sense at least one gate line for compensation of a driving waiting state of the display panel, and normal driving configured to display an image on the display panel.