AMOLED Display Aging Compensation via 10-bit Color Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional AMOLED display devices face challenges in precisely compensating for aging, leading to inhomogeneous display due to differences in organic material degradation rates across pixels, which affects light emission efficiency and color accuracy.
Innovation Solution
An AMOLED display device with a data processor processing 8-bit image data and generating 10-bit compensation data, utilizing a frame rate control module to adjust color depth and a compensation unit with a look-up table to enhance precision in aging compensation, thereby improving homogeneity and color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional 8-bit color depth is used for aging compensation, then the display device complexity is reduced, but the compensation precision is insufficient leading to inhomogeneous display
Solution Approach 1:
The system performs preliminary measurement of display homogeneity and generates compensation data in advance. The compensation unit creates 10-bit compensation data based on measured aging characteristics, which is then applied to correct display inhomogeneity before it affects user perception.
Solution Approach 2:
The invention transitions from 8-bit color depth to 10-bit color depth, adding an extra dimension of precision to the compensation data. This dimensional increase allows for more granular control of compensation values, enabling precise adjustment of aging effects across different pixels.
2Manufacturing precision
If higher color depth (10-bit) compensation data is processed, then the homogeneity and color accuracy are improved, but the data processing load increases
Solution Approach 1:
The system implements a feedback loop where display homogeneity is measured, compensation data is generated and applied, and the process is repeated. This iterative feedback mechanism ensures that 10-bit compensation data accurately reflects actual display conditions while maintaining processing efficiency through targeted corrections.
Solution Approach 2:
The compensation data is applied locally to different pixels based on their individual aging characteristics. Each pixel receives customized compensation values from the 10-bit compensation data, allowing precise local adjustments without requiring complete reprocessing of the entire display output.
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
The solution enables precise compensation for aging, enhancing the homogeneity and color accuracy of AMOLED displays by increasing the color depth from 8 bits to 10 bits, allowing for more nuanced control over light emission and improved display performance.
Implementation Method 1
Light emission of OLED is realized through electroluminescence caused by injection and recombination of carriers of organic semiconductor material and light emissive material under an electric field
Data Source
AI summary
The present invention relates to an AMOLED display device, which includes a display panel; a data processor, which processes image data from a video source and compensation data from a compensation unit and outputs compensated image data, the image data having a first color depth, the compensation data and the compensated image data having a second color depth that is greater than the first color depth; a frame rate control module, which adjusts the compensated image data to the first color depth; a timing controller, which generates a timing control signal; a driver, which drives the display panel; a display measurement module, which measures homogeneity of displaying of the display panel; and a compensation unit, which generates compensation data of second color depth. The present invention also provides a method for precisely compensating an AMOLED display device.