Display Device Luminance Conversion for Camera Capture
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Solution Overview
Problem
Display devices face issues with image quality degradation when captured by cameras due to varying lighting conditions and luminance changes, leading to moiré artifacts and unintended shading.
Innovation Solution
A display device and driving method that convert image data to match camera capturing conditions by adjusting luminance and applying a blur mask to detect edge shapes, ensuring optimal image quality and preventing moiré artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display device displays images with high luminance to improve visibility, then the image quality for human viewing is improved, but moiré artifacts and unintended shading occur when captured by cameras
Solution Approach 1:
The patent converts image data by adjusting luminance parameters based on camera capturing conditions. The image conversion apparatus receives first image data and converts it to second image data with modified luminance values that are suitable for camera capture, thereby preventing moiré artifacts while maintaining visual quality.
Solution Approach 2:
The patent applies preprocessing to the image data before display to anticipate and prevent camera capture issues. By converting the image data in advance based on expected camera characteristics, the system prevents moiré artifacts and unintended shading from occurring during camera capture.
2Object-affected harmful factors
If the display device adjusts luminance to prevent moiré artifacts, then camera capture quality is improved, but contrast ratio may be degraded
Solution Approach 1:
The patent carefully adjusts only the luminance parameter while preserving other image characteristics. The conversion process modifies brightness values to prevent moiré artifacts while maintaining the original contrast ratio and color depth, ensuring that image quality is preserved despite luminance adjustments.
3Object-affected harmful factors
If the display device converts image data for camera capturing conditions, then unintended shading is prevented, but image processing complexity increases
Solution Approach 1:
The patent introduces an image conversion apparatus as an intermediary component between the image source and display device. This dedicated conversion module handles the complex image processing tasks, keeping the overall system architecture clean and manageable while effectively preventing unintended shading and moiré artifacts.
Data Source
AI summary
A display device and a driving method thereof are proposed, the display device including an image conversion apparatus receiving a first image signal from the outside and outputting a second image signal by converting a luminance of the received first image signal; a controller generating image data based on the second image signal; a source driver outputting data signals based on the image data; a display panel including a plurality of sub-pixels that emit light based on the data signals; and a memory, wherein the image conversion apparatus generates the second image signal by converting the luminance of the first image signal in such a manner a to satisfy a reference maximum luminance value stored in the memory.