Spliced Display Screens: Gray-Scale Compensation for Thermal Variation
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Solution Overview
Problem
The spliced display screens, particularly mini LED displays, suffer from temperature-related issues due to inefficient heat dissipation, leading to reduced luminous efficiency and visual afterimages, and existing gray scale compensation algorithms lack universality across different spliced display screens with varying resolutions and peak brightness.
Innovation Solution
A method for spliced display screens that involves sampling frame image data, performing gray scale compensation using a pre-generated compensation table with temperature adjustment parameters specific to each screen, and applying convolution kernels to account for thermal diffusion, ensuring consistent compensation across diverse display configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional gray scale compensation algorithm is used, then compensation can be achieved for a single spliced display screen, but the algorithm lacks universality and cannot be applied to different display screens with varying resolutions and peak brightness
Solution Approach 1:
The patent transforms the compensation algorithm into a universal form by changing parameters dynamically. Instead of hardcoding screen-specific values, the system uses adjustable parameters including a temperature adjustment parameter that varies with the spliced display screen, and a gray scale compensation coefficient that is determined based on region characteristics. This allows the same algorithm to adapt to different resolutions and peak brightness levels.
Solution Approach 2:
The algorithm becomes dynamic by determining the gray scale compensation coefficient based on the specific characteristics of each display region rather than using fixed values. The system calculates this coefficient dynamically during operation, allowing the compensation to automatically adapt to the actual display conditions of each region without requiring manual reconfiguration.
2Duration of action of moving object
If mini LED display operates for a long time, then continuous display is achieved, but heat accumulation causes temperature increase and reduced luminous efficiency
Solution Approach 1:
The patent converts the harmful thermal diffusion effect into a beneficial compensation mechanism. Instead of trying to eliminate heat accumulation, the system measures the temperature-induced gray scale changes and uses this information to dynamically adjust the display output. The thermal diffusion between adjacent regions is accounted for by calculating compensation coefficients that compensate for the temperature variations, transforming the heat problem into a controllable parameter.
3Device complexity
If gray scale compensation is performed without considering thermal diffusion, then processing is simplified, but temperature differences between regions cause visual afterimages
Solution Approach 1:
The patent divides the display screen into multiple regions and calculates a separate gray scale compensation coefficient for each region. This segmentation allows the system to account for local temperature variations and thermal diffusion effects specific to each region, rather than applying a uniform compensation approach. By processing regions independently with their own compensation coefficients, the system maintains manageable complexity while achieving high display quality consistency.
Data Source
AI summary
A spliced display screen, and a display method, a parameter determination method and a control system for a spliced display screen are provided. The spliced display screen includes display panels spliced together. The method includes: determining initial gray scale compensation data according to first gray scale data of a pixel in current frame image data and a gray scale compensation data table, the gray scale compensation data table includes a temperature adjustment parameter configured for the spliced display screen, which varies with the spliced display screen; determining a gray scale compensation coefficient of each display region of at least one display panel; determining target gray scale compensation data according to the gray scale compensation coefficient and the initial gray scale compensation data; and performing a gray scale compensation on the current frame image data according to the target gray scale compensation data to obtain compensated frame image data.