Interlace Optical Module Pixel Shift Synchronization
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Solution Overview
Problem
Existing projection-type display technologies face issues with resolution enhancement due to discrepancies in timing between pixel shift and display content, leading to asynchronization and decreased display quality, particularly when using liquid crystal panels driven by non-interlace methods.
Innovation Solution
An optical module with a light modulator driven by an interlace method, featuring sub-pixels arranged in a matrix to allow pixel shift in directions intersecting the scan direction, effectively doubling the apparent resolution by synchronizing color light fluxes across multiple shift positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel shift is performed to increase resolution, then apparent number of pixels increases, but asynchronization between shift position and display content occurs causing in-plane unevenness
Solution Approach 1:
The patent applies preliminary action by rewriting pixels in advance according to their final destination position after shift. Specifically, when performing pixel shift, the system pre-rewrites pixels at positions that will be shifted to, ensuring that when the shift occurs, the displayed content is already synchronized with the new position, thereby preventing asynchronization and in-plane unevenness
Solution Approach 2:
The patent implements dynamics by making the pixel rewriting operation adaptive to the shift operation. The rewriting process dynamically adjusts to the shift amount and direction, with pixels being rewritten at different timings based on their intended shifted positions. This dynamic coordination ensures that content rewriting and pixel shifting are synchronized, maintaining display quality while achieving resolution enhancement
2Ease of manufacture
If non-interlace method is used for driving light modulator, then rewriting is simpler, but asynchronization occurs between beginning and end of frame rewriting
Solution Approach 1:
The patent applies preliminary action by performing pixel rewriting in advance of the actual display timing. Pixels are rewritten at positions that account for their future shifted locations, so that when the shift operation occurs, the content is already properly synchronized. This pre-positioning approach maintains simplicity while ensuring synchronization across the entire frame
Solution Approach 2:
The patent implements dynamics by making the rewriting process responsive to shift parameters. The system dynamically determines rewriting timing and positions based on the intended shift amount and direction. This dynamic adjustment ensures that even with non-interlace scanning, all pixels are rewritten at appropriate timings to maintain synchronization after shifting
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The interlace-driven optical module achieves improved display quality by distributing asynchronization across the screen, reducing in-plane unevenness and enhancing quasi-resolution, while maintaining high brightness and resolution in both directions.
Implementation Method 1
a liquid crystal panel for polarization direction control that functions as a pixel shift mechanism that shifts the optical path of video image light having passed through the liquid crystal panel
Implementation Method 2
The liquid crystal panel for polarization direction control shifts the optical path in a predetermined direction by switching applied voltage from ON to OFF and vice versa
Data Source
AI summary
An optical module includes a light modulator that modulates light and includes a plurality of pixels, and a pixel shift mechanism. The light modulator is driven based on an interlace method. The pixels of the light modulator each include a first sub-pixel on which a first color light flux or a second color light flux is incident, a second sub-pixel on which a color light flux different from the color light flux incident on the first sub-pixel out of the first color light flux and the second color light flux is incident, and a third sub-pixel and a fourth sub-pixel on which a third color light flux is incident. The third sub-pixel and the fourth sub-pixel are arranged in a scan direction of the light modulator. The pixel shift mechanism shifts the light modulator in a direction that intersects the scan direction.