OLED Pixel Compensation Method for Brightness Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED display panels face challenges with brightness uniformity and residual images due to non-uniformity in electrical parameters of thin film transistors, which are difficult to completely overcome through manufacturing processes alone.
Innovation Solution
A compensation method that involves obtaining initial compensation parameters and conversion ranges for each pixel, optimizing these based on compensation effects to achieve optimized parameters and ranges, which are then used to compensate display data signals, thereby improving brightness uniformity and reducing residual images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manufacturing processes are improved to overcome non-uniformity in electrical parameters, then manufacturing precision is improved, but production complexity and cost increase
Solution Approach 1:
The patent applies preliminary action by measuring electrical parameters (threshold voltage, mobility, on-current) of thin film transistors during the manufacturing process and pre-calculating compensation parameters before the display panel is fully assembled. This allows compensation data to be prepared in advance and stored in memory, avoiding the need for complex post-manufacturing adjustments and reducing overall production complexity.
Solution Approach 2:
The patent changes electrical parameters by using measured values of threshold voltage, mobility, and on-current to calculate compensation parameters that adjust the driving voltage for each pixel. This parameter transformation converts the problem of non-uniform electrical characteristics into a solvable compensation calculation, achieving uniform display brightness without requiring perfect manufacturing consistency.
2Illumination intensity
If compensation parameters are optimized for each pixel, then brightness uniformity is improved, but data processing complexity increases
Solution Approach 1:
The patent segments the compensation process by calculating compensation parameters for each pixel independently based on its specific transistor characteristics. Instead of applying a global compensation factor, the system divides the display into individual pixel units, each with its own compensation value stored in memory, allowing precise brightness uniformity without requiring complex real-time processing for the entire display.
Solution Approach 2:
The patent uses copying by storing calculated compensation parameters in memory for each pixel and retrieving these pre-computed values during display operation. This eliminates the need for complex real-time calculations during actual display rendering, as the system simply copies and applies the pre-stored compensation data to achieve brightness uniformity efficiently.
3Reliability
If conversion range for compensation parameters is increased, then compensation strength is improved, but compensation precision decreases
Solution Approach 1:
The patent applies dynamics by making the conversion range adaptive rather than fixed. The system dynamically adjusts the conversion range based on the specific characteristics of each pixel's compensation parameters, allowing the conversion process to expand or contract its range as needed. This dynamic adjustment enables the system to maintain both strong compensation effects where needed and high precision where parameter values are small, resolving the trade-off between compensation strength and precision.
Data Source
AI summary
A compensation method of a display panel, a compensation device, a display method, a display apparatus and a storage medium. The compensation method of a display panel includes: obtaining an initial compensation parameter of each pixel of the display panel and an initial conversion range for performing a data conversion on the initial compensation parameter; optimizing the initial conversion range based on a compensation effect of a compensation parameter to obtain an optimized conversion range, where the compensation effect of the compensation parameter is obtained based on the initial conversion range; and obtaining an optimized compensation parameter of each pixel of the display panel based on the optimized conversion range.