Segmented Polarization Controller for Stereoscopic Display Phase Retardation
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Solution Overview
Problem
Conventional polarization controllers used in stereoscopic display apparatuses cause phase retardation differences among light beams of different wavelengths, leading to incorrect stereoscopic image perception, which existing methods attempt to compensate for using complex and expensive circuitry.
Innovation Solution
A display apparatus comprising a polarization controller and a compensator with control and compensating regions for each light wavelength, where the compensator adjusts phase retardation to ensure equal polarization of red, green, and blue light beams, allowing accurate stereoscopic image perception without complex circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional polarization controller with uniform thickness is used, then the device structure is simple, but the phase retardation of light beams with different wavelengths becomes inconsistent
Solution Approach 1:
The polarization controller is divided into multiple control regions (first control region, second control region, third control region) corresponding to different wavelength ranges. Each region has independently controllable liquid crystal layers that can be adjusted to provide appropriate phase retardation for specific wavelength bands, thereby achieving consistent phase retardation across all wavelengths despite the segmented structure.
Solution Approach 2:
Different control regions are designed with different optical properties and thickness characteristics tailored to specific wavelength ranges. The liquid crystal layers in each region can be independently optimized to provide the precise phase retardation needed for red, green, and blue light respectively, ensuring that each wavelength experiences the optimal local optical conditions.
2Measurement precision
If complex circuitry is used to compensate for phase retardation differences, then the stereoscopic image accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic calculation and compensation circuitry with an optical solution using liquid crystal layers. The liquid crystal layers physically modulate the phase retardation of light beams through optical field control, eliminating the need for complex electronic computation and circuitry while achieving the same goal of correcting phase retardation differences for accurate stereoscopic imaging.
Solution Approach 2:
The patent changes the optical parameters (phase retardation) of the liquid crystal layers in different control regions to directly compensate for wavelength-dependent phase differences. By adjusting the thickness, orientation, or material properties of liquid crystal layers in each region, the system achieves wavelength-specific phase correction without requiring electronic measurement and calculation systems.
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 solution ensures accurate stereoscopic image perception by compensating for phase retardation differences among light beams of different wavelengths, improving image quality without the need for complex and costly circuitry.
Implementation Method 1
The polarization controller utilizes the polarity of light. For instance, the light of one image only exhibits linear polarizing of a vertical direction and the light of the other image exhibits only linear polarizing of a horizontal direction.
Implementation Method 2
light beams with different wavelengths generate different phase retardations after passing through the polarization controller. The compensator has a plurality of first compensating regions, a plurality of second compensating regions and a plurality of third compensating regions. The first compensating regions, the second compensating regions and the third compensating regions respectively receive the first light, the second light and the third light. Compensations of phase retardation of the first light generated by passing through the first compensating regions, the second light generated by passing through the second compensating regions and third light generated by passing through the third compensating regions are different from one another
Data Source
AI summary
A representative display device includes a display module, a polarization controller and a compensator. Each pixel region of the display module has a first sub-pixel region, a second sub-pixel region and a third sub-pixel region respectively providing a first light, a second light and a third light of the same polarization. The polarization controller has control regions that control the polarization of the light passing therethrough. The compensator has first compensating regions, second compensating regions and third compensating regions corresponding to the first sub-pixel regions, the second sub-pixel regions and the third sub-pixel regions, respectively. The compensations of phase retardation of the first light, the second light and the third light generated by passing through the first compensating regions, the second compensating regions and the third compensating regions are different from one another.