OLED Burn-In Reduction via Dynamic Luminance Look-Up Table
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Solution Overview
Problem
Organic light emitting display devices face challenges with image burn-in, particularly in applications like laptops where consistent images lead to rapid pixel burn-in, hindering their implementation due to reduced image quality and functionality.
Innovation Solution
An organic light emitting display device and driving method that utilize a data processor to generate a luminance look-up table based on burn-in likelihood, adjusting output data to reduce luminance in areas prone to burn-in, while maintaining initial luminance levels in other areas, using a frame memory, data comparer, control value generators, and a luminance controller to minimize image burn-in without affecting image quality or stopping information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screen savers are used to reduce burn-in, then burn-in is reduced, but information transmission is stopped
Solution Approach 1:
The patent changes the luminance parameter dynamically based on pixel usage patterns. The data processor analyzes input data to identify pixels prone to burn-in and adjusts their luminance values accordingly, allowing continuous information transmission while preventing burn-in through parameter modification rather than stopping operation
Solution Approach 2:
The system implements feedback by continuously monitoring input data and pixel luminance levels. The data processor receives input data, compares it with previous frames, identifies pixels at risk of burn-in, and adjusts their luminance in real-time, creating a closed-loop control system that prevents burn-in while maintaining display functionality
2Reliability
If luminance is reduced in susceptible regions to prevent burn-in, then burn-in is reduced, but image quality may deteriorate
Solution Approach 1:
The patent applies local quality by adjusting luminance only in specific regions where burn-in is likely to occur, rather than uniformly across the entire display. The data processor identifies susceptible pixels based on their position and usage patterns, applying luminance reduction selectively to preserve overall image quality while preventing burn-in in vulnerable areas
Solution Approach 2:
The system performs preliminary action by proactively adjusting luminance in pixels identified as prone to burn-in before actual burn-in occurs. The data processor analyzes input data patterns and preemptively modifies luminance values for at-risk pixels, preventing the harmful effect before it manifests while maintaining normal display quality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively minimizes or reduces image burn-in by controlling luminance in susceptible regions while maintaining image quality, with changes in luminance being imperceptible to users, thereby preventing burn-in without interrupting display functionality.
Implementation Method 1
The organic light emitting display device displays an image using organic light emitting diodes that emit light by recombining electrons and holes
Data Source
AI summary
An organic light emitting display device includes: pixels connected to corresponding scanning lines and corresponding data lines; a scanning driver for supplying scanning signals to the scanning lines; a data driver for supplying data signals to the data lines; and a data processor for generating a luminance look-up table corresponding to a likelihood of burn-in for the pixels, for generating output data from input data corresponding to the look-up table, and for supplying the output data to the data driver.