Image Processing Device Crosstalk Correction and Response Speed Improvement
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Solution Overview
Problem
Image display devices that show multiple images from the same screen in different directions face issues with crosstalk and slow response times, particularly when handling fast-changing moving pictures, as existing technologies struggle to effectively correct electrical and optical crosstalk and improve liquid crystal response speed.
Innovation Solution
An image processing device that includes a crosstalk correction processor and a response speed improvement correction processor, which corrects electrical crosstalk and enhances liquid crystal response speed by adjusting sub-pixel gradation values based on adjacent pixel values, thereby reducing crosstalk perception and improving display responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electrical crosstalk correction is performed using LUTs based on adjacent sub-pixel signal levels, then crosstalk is corrected, but the processing complexity increases and response speed decreases
Solution Approach 1:
The patent performs electrical crosstalk correction in advance during the image processing stage before display output. By pre-calculating and applying correction values based on adjacent sub-pixel signal levels using LUTs, the system eliminates the need for complex real-time correction processing during display operation, thus reducing processing complexity and improving response speed while maintaining effective crosstalk correction
Solution Approach 2:
The patent applies partial correction by focusing only on the most significant crosstalk sources (adjacent sub-pixels with highest signal levels) rather than correcting all possible crosstalk interactions. This selective approach using LUTs with predefined correction values for key adjacent pixels reduces computational complexity while achieving sufficient crosstalk correction for practical display purposes
2Adaptability or versatility
If multiple images are displayed in different directions using parallax barrier or lenticular screen, then directional viewing is achieved, but optical crosstalk occurs due to light leakage
Solution Approach 1:
The patent introduces an optical crosstalk correction mechanism that acts as an intermediary between the parallax barrier/lenticular screen and the displayed images. By detecting and correcting optical crosstalk through comparison of displayed images with expected directional separation, the system maintains the directional viewing capability while compensating for light leakage effects that cause crosstalk between different viewing directions
Solution Approach 2:
The patent implements feedback-based optical crosstalk correction by continuously monitoring the displayed images and comparing them with reference images or expected patterns. When optical crosstalk is detected (light leakage causing incorrect image appearance in certain directions), the system adjusts the display output to compensate, thereby maintaining clear directional separation while preserving the versatility of multi-directional viewing
3Speed
If liquid crystal response time is improved by applying drive voltage, then response speed increases, but transmittance stability decreases during fast-changing images
Solution Approach 1:
The patent applies periodic drive signals to the liquid crystal panel with optimized timing and duration. By using pulsed or periodically modulated drive voltages rather than continuous voltage application, the system achieves fast response during transitions while allowing the liquid crystal to stabilize during steady states, thus improving response speed without sacrificing transmittance stability during fast-changing images
Solution Approach 2:
The patent dynamically adjusts the drive voltage characteristics based on the temporal changes in image content. During fast-changing sequences, the system applies higher or longer-duration voltages to ensure adequate response speed. During stable periods, it reduces voltage to maintain transmittance stability. This dynamic adaptation allows the liquid crystal display to optimize between response speed and stability according to real-time viewing conditions
Data Source
AI summary
An image processing device for receiving input image data in which multiple images displayed in mutually differing directions from a display are combined includes: a crosstalk correction processor for performing a crosstalk correction; and a response speed improvement correction processor for performing a response speed improvement correction. The crosstalk correction processor has an optical crosstalk correction processor for performing an optical crosstalk correction, and an electrical crosstalk correction processor for performing an electrical crosstalk correction. The optical crosstalk correction processor performs the correction based on the input image data and outputs optical crosstalk correction processed image data.