Liquid Crystal Projector Image Processing Device Domain Correction
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Solution Overview
Problem
Liquid crystal projectors face display defects due to lateral electric fields, which cause alignment defects and domain issues, especially when increasing resolution through pixel shifting, leading to display contradictions and visual deterioration.
Innovation Solution
An image processing device that temporarily determines and cancels domain corrections based on gradation levels of adjacent pixels, ensuring that domain corrections are only applied when necessary and not when the gradation levels are identical across multiple fields, thereby reducing the frequency of domain corrections and preventing display contradictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If domain correction is performed to suppress display defects caused by lateral electric fields, then display quality is improved, but the number of times domain correction is performed increases, leading to display contradiction and visual deterioration
Solution Approach 1:
The invention changes the parameter of domain correction frequency by introducing a determination mechanism that compares gradation levels across multiple fields. By adjusting when domain correction is applied (only when gradation levels differ between fields), the system reduces unnecessary corrections while maintaining display quality where needed.
Solution Approach 2:
The invention implements a feedback mechanism by comparing the gradation level of a pixel in the current field with the gradation level of the same pixel in a previous field. This feedback loop determines whether domain correction should be applied, allowing the system to adaptively control correction frequency based on actual image content changes.
2Measurement precision
If resolution is increased in a pseudo manner using pixel shifting, then resolution is improved, but the likelihood of display contradiction increases due to more frequent domain correction
Solution Approach 1:
The invention applies domain correction periodically rather than continuously by checking gradation levels at specific intervals (comparing current field with previous field). This periodic approach reduces the frequency of domain corrections while maintaining effectiveness in suppressing display defects caused by pixel shifting for resolution enhancement.
Data Source
AI summary
An image processing device that uses pixels displayed in a liquid crystal panel to display, across a plurality of fields, pixels constituting an image specified with image data includes, a temporary determining unit configured to, based on a gradation level specified for one pixel of a liquid crystal panel and a gradation level specified for another pixel adjacent to the one pixel in one field, make temporary determination on whether to correct the gradation level of at least one of the one pixel or the other pixel, and a cancellation unit configured to cancel the temporary determination when the gradation level specified for each of the one pixel and the gradation level specified for the other pixel are identical to a gradation level in a field that precedes, by a plurality of the fields, the one field.