Timing Controller Adaptive Luminance Control Afterimage Prevention
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Solution Overview
Problem
Display devices such as LCD, PDP, and OLED suffer from an afterimage phenomenon, which degrades image quality due to degradation of circuit devices in pixels, leading to persistent images being displayed after the original image disappears.
Innovation Solution
Implementing a timing controller that uses adaptive luminance control by detecting Luminance Control Areas in the display device, setting luminance control reference information, and adjusting luminance levels to prevent afterimages, thereby improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adaptive luminance control is implemented to prevent afterimages, then image quality is improved, but device complexity increases
Solution Approach 1:
The display screen is divided into multiple luminance control areas, each independently controlled to prevent afterimages. The timing controller segments the display region and applies different luminance control strategies to different areas based on afterimage risk levels, thereby improving image quality without uniformly increasing complexity across the entire device.
Solution Approach 2:
Different luminance control parameters are applied to different regions of the display based on local afterimage characteristics. High-risk areas receive stronger luminance control while low-risk areas maintain normal operation, allowing targeted intervention that improves overall image quality while minimizing the complexity burden on the control system.
2Reliability
If differential luminance control is applied in each area, then afterimage prevention effectiveness is improved, but control complexity increases
Solution Approach 1:
The display area is segmented into multiple luminance control areas with different afterimage risks. Each area is assigned specific control parameters including luminance control start frames, end frames, and control ratios. This segmentation enables differential control that targets afterimage prevention effectiveness while organizing complexity into manageable discrete regions.
Solution Approach 2:
The luminance control parameters are dynamically adjusted based on the specific characteristics of each luminance control area. The control start frame, end frame, and control ratio are set differently for each area according to its afterimage risk level, allowing the system to adapt control complexity to actual needs rather than applying uniform complex control across the entire display.
Data Source
AI summary
A timing controller for a display device, the timing controller including a luminance control area detecting device configured to analyze image data and detect at least one candidate area of an active area of a display panel in the display device satisfying a luminance control area condition as a luminance control area; a luminance control reference setting device configured to set luminance control reference information on the luminance control area, based on an input luminance of the at least one candidate area; and a luminance controlling device configured to control a luminance of the luminance control area, based on the luminance control reference information.