Field Inversion Display Device Vertical Crosstalk Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices using field inversion driving systems suffer from degradation in display quality due to vertical crosstalk, particularly in moving images, and require large-scale memory for correction, which is not feasible for all scenarios.
Innovation Solution
A display device and driving method that converts input signals into double-speed signals with a field frequency twice the original, allowing crosstalk correction between two fields using information from the first field, and utilizes independent correction coefficients based on accumulated luminance information to address vertical crosstalk specific to field inversion driving systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If field inversion driving is used to prevent liquid crystal degradation, then display device reliability is improved, but vertical crosstalk occurs causing display quality degradation
Solution Approach 1:
The patent applies preliminary action by accumulating luminance information from previous fields before the current field is displayed. This accumulated information is then used to correct vertical crosstalk in the current field, allowing the harmful crosstalk effect to be compensated for in advance. The correction is performed by adjusting the display signal based on the accumulated luminance data from prior fields.
Solution Approach 2:
The patent implements feedback by using the accumulated luminance information from previous fields to correct the current field's display signal. This creates a feedback loop where the system continuously monitors and adjusts based on previous performance, compensating for vertical crosstalk effects through iterative correction using historical data.
2Object-affected harmful factors
If image data correction is performed for each pixel to fix vertical crosstalk, then display quality is improved, but large-scale memory is required which increases device complexity
Solution Approach 1:
The patent extracts only the necessary luminance information from the complete image data, specifically accumulating only the luminance components from previous fields rather than storing entire image frames. This selective extraction reduces the memory requirement from storing full image data to storing only essential luminance information, thereby reducing device complexity while maintaining correction capability.
Solution Approach 2:
The patent applies partial action by using only the luminance information from previous fields rather than requiring complete image data storage. This partial approach provides sufficient correction capability without the excessive memory capacity that would be needed to store full frame data, achieving the correction function with minimal necessary resources.
Data Source
AI summary
Disclosed herein is a display device using a field inversion driving system, the display device being formed by arranging pixels each including an electrooptic element in a form of a matrix and inverting polarity of a display signal to be written to each of the pixels in field periods, the display device including: double-speed converting means for converting an input display signal into a double-speed display signal having a field frequency twice a field frequency of said display signal; and crosstalk correcting means for correcting crosstalk in a second field of two fields as a unit of said double-speed display signal generated by said double-speed converting means, using information of the first field.