Splicing Display Screen Gray Scale Compensation Circuit
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Solution Overview
Problem
Mini LED display screens face issues with residual images due to temperature increments and luminous efficiency reduction, leading to inconsistent display effects.
Innovation Solution
A splicing display screen with a gray scale compensation circuit that samples frame image data and performs gray scale compensation using a processor, determining initial gray scale compensation data, gray scale compensation coefficients, and target compensation data to eliminate residual images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mini LED display screens are used for high definition display of super large display screens, then display resolution and screen size are improved, but temperature increment and temperature differences among different areas occur due to heat accumulation, leading to luminous efficiency reduction and visible residual images
Solution Approach 1:
The system performs preliminary sampling of historical frame image data and pre-calculates gray scale compensation data before the residual image becomes visible. By analyzing the display content in advance and computing compensation values based on historical data, the system prepares correction data that compensates for anticipated temperature-induced luminous efficiency changes, thereby preventing residual image formation while maintaining high brightness display.
2Duration of action of stationary object
If the display screen operates for a long time, then continuous display functionality is maintained, but heat energy cannot be dissipated in time, resulting in temperature increment and luminous efficiency decrease
Solution Approach 1:
The system implements a feedback mechanism by continuously sampling historical frame image data and using it to calculate gray scale compensation data. The compensation data is generated based on the actual display content and historical temperature effects, creating a closed-loop system that adjusts display parameters in real-time to maintain luminous efficiency during continuous operation, thereby addressing the energy loss problem while maintaining continuous display functionality.
3Reliability
If gray scale compensation is performed using historical frame image data and spatial domain weighted gray scale data, then visible residual images are eliminated and display uniformity is improved, but system complexity increases due to multiple data processing steps
Solution Approach 1:
The compensation process is segmented into distinct functional modules: a sampling module that acquires historical frame image data, a processing module that calculates time domain and spatial domain weighted gray scale data, and a compensation module that applies the calculated compensation data. This segmentation allows each module to perform a specific function independently, making the complex compensation process more manageable and implementable while achieving improved display uniformity and residual image elimination.
Data Source
AI summary
A splicing display screen includes: a gray scale compensation circuit; and display panels spliced together and each divided into display areas. The gray scale compensation circuit includes: a sampling module, configured to sample, according to a preset sequence order, frame image data in a video frame sequence to obtain current frame image data; and a processor, where the processor is configured to determine initial gray scale compensation data according to first gray scale data of each pixel in the current frame image data and a pre-generated gray scale compensation data table; determine a gray scale compensation coefficient of each display area; determine target gray scale compensation data according to the gray scale compensation coefficient and the initial gray scale compensation data; and perform, according to the target gray scale compensation data, gray scale compensation on the current frame image data to obtain compensated frame image data.