AMOLED Display Sticking Image Elimination via Gray Scale Compensation

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Solution Overview

Problem

AMOLED display panels experience sticking images due to temperature drift, which existing solutions attempt to address through sub-circuits that are difficult and costly to configure, leading to reduced response speed and aperture opening ratio.

Innovation Solution

Calculating the duration of electricity connection for each TFT and obtaining gray scale compensation values to adjust driving electricity, ensuring consistent driving electricity across TFTs, thereby eliminating sticking images without the need for sub-circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sub-circuits are configured to amend TFT temperature drift, then sticking image problem is solved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvesticking image eliminationVSAvoidsub-circuit configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts the temperature drift compensation function from the physical sub-circuit domain and relocates it to the software control domain. By measuring the actual temperature drift of each TFT and calculating compensation values through control algorithms, the invention eliminates the need for complex sub-circuit configurations while maintaining sticking image elimination capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical/electrical sub-circuit system with a software-based control system. Instead of using additional transistors and capacitors to compensate for temperature drift, the invention uses temperature measurement data and computational algorithms to generate compensation values that adjust the driving signals, thereby substituting hardware complexity with software intelligence

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If sub-circuits are configured to amend TFT temperature drift, then sticking image problem is solved, but manufacturing cost increases

Engineering Contradiction:

Improvesticking image eliminationVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs cost-effective temperature sensing mechanisms and standard display components that can be mass-produced at low cost. Rather than requiring expensive specialized sub-circuits for each pixel, the invention uses affordable temperature measurement approaches combined with software processing to achieve the same reliability outcome

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If sub-circuits are configured to amend TFT temperature drift, then sticking image problem is solved, but response speed decreases

Engineering Contradiction:

Improvesticking image eliminationVSAvoidresponse speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent implements periodic temperature measurement and compensation value updates at optimized intervals. By measuring temperature drift at appropriate periods and adjusting compensation values dynamically, the system maintains sticking image elimination while avoiding the continuous overhead that would slow down response speed

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent performs temperature measurement and compensation value calculation in advance before the actual display refresh. By preparing compensation values ahead of time based on measured temperature drift, the system ensures that compensation is applied without delaying the critical display response timing

Inventive Principle:

Principle #10Preliminary action

4Reliability

If sub-circuits are configured to amend TFT temperature drift, then sticking image problem is solved, but aperture opening ratio decreases

Engineering Contradiction:

Improvesticking image eliminationVSAvoidaperture opening ratio

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent removes the additional transistors and capacitors that would physically occupy pixel area and reduce aperture ratio. By extracting the compensation function to the software domain, the invention maintains full pixel aperture area while still achieving sticking image elimination through temperature-based compensation algorithms

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11151934B2AMOLED display sticking image elimination method, display terminal and storage medium

Publication Date: 2021.10.19 SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD

AI summary

The present disclosure discloses an AMOLED display sticking images elimination method. When an AMOLED display panel is detected to be connected to electricity, the first duration of electricity connection of the display panel is calculated. Based on the first duration of electricity connection, gray scale compensation values of the corresponding TFTs are obtained; based on the gray scale compensation values, the TFTs are compensated according to the gray scale compensation values, so that the driving electricity of the TFTs corresponding to the display panel is amended, and the driving electricity flowing through the TFT is kept consistent. The disclosure further discloses a display terminal and a computer readable storage medium. According to the present disclosure, the problem of the AMOLED display sticking images is solved by using the low-cost and simple implementation mode.