Optical Phase Modulator Voltage Adjustment for Image Quality
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Solution Overview
Problem
Display apparatuses with optical phase modulators face difficulties in detecting and correcting image quality defects, as the relationship between voltage application and phase modulation is nonlinear, making it challenging to determine the position and degree of defects from the reproduction image.
Innovation Solution
A display apparatus comprising a light source, an optical phase modulator with multiple pixels, a drive circuit, and a controller that divides the pixel region into multiple areas, applying voltage based on phase distribution data to achieve optimal image quality by adjusting the voltage application in each division region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If voltage application is adjusted uniformly across the entire pixel region, then the adjustment process is simple, but image quality defects cannot be precisely corrected due to nonlinear voltage-phase relationship
Solution Approach 1:
The pixel region of the optical phase modulator is divided into multiple division regions (e.g., first through fourth division regions). Each division region is independently adjusted using separate adjustment data, allowing precise correction of image quality defects in different areas while managing complexity through modular adjustment approaches.
2Manufacturing precision
If the pixel region is divided into multiple division regions for independent adjustment, then image quality correction precision is improved, but the adjustment process complexity increases
Solution Approach 1:
Different adjustment data are applied to different division regions based on their specific image quality characteristics. Each division region receives customized voltage application adjustments tailored to its local requirements, enabling precise local correction while the overall system remains manageable through systematic regional control.
3Difficulty of detecting and measuring
If uniform voltage application is used across all pixels, then the device operation is simple, but detection of image quality defects becomes difficult due to nonlinear phase modulation
Solution Approach 1:
By segmenting the pixel region into multiple division regions, the patent enables localized detection and correction of image quality defects. Each division region can be independently analyzed and adjusted, making defect detection more manageable despite the nonlinear phase modulation characteristics of the optical phase modulator.
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
This approach allows for precise adjustment of voltage application, improving image quality and simplifying the adjustment process, thereby enhancing the productivity and lifespan of the display apparatus.
Implementation Method 1
an optical phase modulator modulating a phase of light from the light source for each of the pixels by displaying a phase distribution pattern
Implementation Method 2
The optical phase modulator includes, for example, SLM (Spatial Light Modulator) such as a liquid crystal panel
Implementation Method 3
The drive circuit performs voltage application to the optical phase modulator. The voltage application is based on the phase distribution data
Data Source
AI summary
A display apparatus includes a light source, an optical phase modulator, a drive circuit, and a controller. The optical phase modulator includes a plurality of pixels, and modulates a phase of light from the light source for each of the pixels by displaying a phase distribution pattern indicated by phase distribution data. The drive circuit performs voltage application to the optical phase modulator based on the phase distribution data. The controller divides a pixel region in the optical phase modulator into a plurality of division regions. The controller causes the drive circuit to perform voltage application based on adjustment data to perform display in at least one division region of the plurality of division regions. The adjustment data is for determining an amount of voltage application performed by the drive circuit. The amount of voltage application corresponds to the phase distribution data. The display is based on the adjustment data.