Display Panel Driver Dynamic Luminance Gain Adjustment
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Solution Overview
Problem
As the driving time of display devices increases, pixels deteriorate, leading to a reduced lifetime and a need to adjust luminance to slow down this deterioration.
Innovation Solution
A display device that determines a set time based on accumulated deterioration amounts and adjusts the luminance gain accordingly, applying this gain to input image data to extend pixel lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display device operates continuously with high luminance, then the display quality and brightness are maintained, but the pixels deteriorate faster and lifetime decreases
Solution Approach 1:
The patent implements dynamic luminance adjustment by continuously monitoring accumulated deterioration amounts of panel blocks and adapting the luminance gain accordingly. The system transitions from static luminance display to dynamic control where luminance parameters are adjusted in real-time based on pixel health status, resolving the contradiction between maintaining display quality and extending pixel lifetime
Solution Approach 2:
The patent changes the luminance parameter dynamically based on accumulated deterioration amounts. By modifying the luminance gain parameter according to panel block deterioration status, the system reduces luminance output when deterioration is detected, thereby extending pixel lifetime while maintaining acceptable display quality
2Reliability
If the luminance is reduced to extend pixel lifetime, then the pixel deterioration rate decreases, but the display brightness and quality are compromised
Solution Approach 1:
The patent applies local quality by dividing the display panel into multiple panel blocks and determining accumulated deterioration amounts for each block individually. The luminance gain is then applied selectively to different regions based on their specific deterioration status, allowing the system to maintain high luminance in healthy regions while reducing luminance only in deteriorated regions, thus preserving overall display quality while extending pixel lifetime
3Reliability
If the set time for luminance reduction is extended, then the pixel lifetime is further protected, but the power consumption increases and afterimage effects worsen
Solution Approach 1:
The patent implements feedback control by continuously monitoring accumulated deterioration amounts and adjusting the luminance gain and set time accordingly. The system uses deterioration data as feedback to optimize the balance between pixel protection and power consumption, reducing luminance only when and where deterioration is detected rather than applying continuous reduction, thus avoiding unnecessary power consumption while still protecting pixels
Data Source
AI summary
A display device includes a display panel divided into panel blocks including pixels, and a display panel driver which drives the display panel, sets a time point to which a set time elapses from a time point when input image data is determined to be a still image as an operation time point, decreases a luminance gain from the operation time point, determines the set time based on accumulated deterioration amounts of the panel blocks, and applies the luminance gain to the input image data.