Dynamic OLED Compensation for Mura Reduction

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Solution Overview

Problem

Organic light-emitting diode (OLED) display panels face challenges with brightness uniformity and afterimages due to non-uniformity in electrical parameters of thin film transistors, leading to the Mura phenomenon and unsatisfactory compensation effects across varying brightness levels.

Innovation Solution

An optical compensation method that adjusts pre-stored compensation parameters based on current brightness levels, using a calculation formula to dynamically compensate display data signals, with an adjusted compensation parameter that varies between 0.5 and 5 times the original, to improve brightness uniformity and reduce the Mura effect.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If pre-stored compensation parameters are used without adjustment, then the compensation process is simple and fast, but the compensation effect is unsatisfactory across varying brightness levels

Engineering Contradiction:
Improvecompensation effectVSAvoidcompensation process complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the compensation parameter adjustable based on brightness level. Instead of using a fixed pre-stored compensation parameter, the system dynamically selects or adjusts the compensation parameter according to the current brightness level, allowing the compensation effect to adapt to varying display conditions while maintaining process efficiency.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements parameter changes by modifying the compensation parameter value based on brightness level. The system changes the compensation parameter from a static pre-stored value to a dynamic value that varies with brightness, thereby improving compensation accuracy across different brightness conditions without significantly increasing system complexity.

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If compensation parameters are adjusted for all brightness levels, then brightness uniformity is improved, but processing time and computational load increase

Engineering Contradiction:
Improvebrightness uniformityVSAvoidprocessing time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent applies partial action by adjusting compensation parameters selectively based on brightness level requirements. Instead of continuously adjusting parameters for all possible brightness levels, the system adjusts parameters only when necessary to achieve the desired compensation effect, reducing unnecessary processing while maintaining brightness uniformity.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The system optimizes parameter changes by adjusting compensation parameters only to the extent needed for different brightness levels. Rather than implementing full parameter adjustments across all brightness ranges, the system makes targeted parameter changes that achieve sufficient compensation while minimizing processing time and computational overhead.

Inventive Principle:
Principle #35Parameter changes

3Manufacturing precision

If fixed compensation parameters are used, then the system is simple to implement, but the Mura phenomenon persists across different brightness levels

Engineering Contradiction:
Improvedisplay uniformityVSAvoidparameter adjustment mechanism
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent resolves the contradiction by introducing a dynamic parameter selection mechanism that adapts to brightness levels. The system incorporates a brightness level detection component and a parameter selection component that work together to automatically select appropriate compensation parameters based on current brightness, eliminating the Mura phenomenon without requiring complex manual adjustment mechanisms.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system eliminates the Mura phenomenon by implementing parameter changes that adapt to brightness conditions. The compensation parameter is changed from a fixed value to a variable value that depends on brightness level, achieving improved display uniformity while keeping the implementation relatively simple through automated parameter selection based on brightness detection.

Inventive Principle:
Principle #35Parameter changes

4Measurement precision

If compensation parameters are dynamically adjusted based on brightness level, then compensation accuracy is improved, but the system complexity increases

Engineering Contradiction:
Improvecompensation accuracyVSAvoidsystem structure
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the brightness range into multiple levels, with each level having its own optimized compensation parameter. This segmentation approach allows the system to achieve high compensation accuracy for each brightness level while keeping the overall system structure manageable through organized parameter storage and selection mechanisms.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent uses an intermediary approach by introducing a parameter selection component that acts as a mediator between brightness level detection and compensation application. This intermediary component simplifies the system structure by centralizing the parameter selection logic, thereby achieving high compensation accuracy without proportionally increasing overall system complexity.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11380255B2Optical compensation method and device, display device, display method and storage medium
Publication Date: 2022.07.05 ORDOS YUANSHENG OPTOELECTRONICS
  • US11380255B2 patent drawing
  • US11380255B2 patent drawing
  • US11380255B2 patent drawing

AI summary

An optical compensation method for a display panel, an optical compensation device for a display panel, a display method for a display panel, a display device, and a storage medium are disclosed. The optical compensation method for a display panel includes: acquiring a pre-stored compensation parameter of the display panel; acquiring a current brightness level of the display panel; adjusting the pre-stored compensation parameter based on the current brightness level to obtain an adjusted compensation parameter; and compensating a display data signal of the display panel based on the adjusted compensation parameter.