Polarization Switching Panel for Cost-Effective 3D Display
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Solution Overview
Problem
Current three-dimensional image display technologies using shutter glasses are costly for public displays, while those using polarized glasses incur increased manufacturing costs due to the need for polarization switching panels or patterned retarders, making them unsuitable for widespread use, especially in homes.
Innovation Solution
A three-dimensional image display device incorporating a polarization switching panel with a detachable design, synchronized with a shutter member, that converts linear polarization into circular polarization without patterning electrodes, allowing for efficient and cost-effective 3D image creation using a 3D synchronization signal, and optionally utilizing a backlight that turns off during image transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polarized glasses are utilized with a polarization switching panel or patterned retarder, then manufacturing cost is reduced compared to shutter glasses, but the overall manufacturing cost increases due to additional processes
Solution Approach 1:
The patent extracts the polarization switching function from the display device itself and relocates it to detachable glasses worn by the user. The display device only needs to output alternating left and right eye images, while the polarization switching panel and patterned retarder are placed in the glasses, eliminating the need for complex integrated structures in the display device.
Solution Approach 2:
The patent introduces detachable glasses as an intermediary component between the display device and the user's eyes. These glasses contain the polarization switching panel and patterned retarder, serving as a mediator that separates the functions of image display and polarization control, thereby simplifying the display device while maintaining 3D functionality.
2Reliability
If a polarization switching panel is permanently attached to the display device, then three-dimensional effect is achieved, but the device becomes unsuitable for home use due to increased manufacturing cost
Solution Approach 1:
The patent makes the polarization switching panel and patterned retarder detachable rather than permanently fixed, allowing the system to adapt between different usage scenarios. Users can attach the glasses when 3D viewing is needed and remove them otherwise, providing dynamic flexibility that makes the system suitable for both public and home environments.
Solution Approach 2:
The patent changes the operational state of the polarization switching panel by controlling the timing of polarization switching to coincide with the display of left and right eye images. By synchronizing the polarization state changes with the image sequence, the system achieves reliable 3D effect without requiring permanent structural modifications.
3Reliability
If shutter glasses are used for three-dimensional display, then image quality is maintained without data loss, but the cost becomes prohibitive for public displays
Solution Approach 1:
The patent replaces expensive shutter glasses with a more cost-effective solution using polarized glasses with detachable polarization switching panels. While shutter glasses provide excellent image quality through active shuttering, the patent achieves acceptable 3D效果 with lower-cost polarized technology, making it suitable for public displays where cost is a critical factor.
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
Enables cost-effective three-dimensional image display suitable for both small and large audiences by reducing manufacturing costs and improving image quality through synchronized polarization switching and shutter control, while maintaining high operation frequency and image separation for depth perception.
Implementation Method 1
the polarization switching panel is configured to convert a light emitted from the display having linear polarization to a light having left circular polarization or a light having right circular polarization
Implementation Method 2
liquid crystals in the liquid crystal layer may be aligned at about +45 degrees or about −45 degrees with respect to the light emitted from the display, in response to a voltage being applied to the upper electrode and the lower electrode
Data Source
AI summary
A three-dimensional image display device includes a display and a polarization switching panel. The display includes a signal transmitter, and is configured to alternately display a left eye image and a right eye image. The polarization switching panel includes a signal receiver, an upper substrate, an upper electrode disposed on the upper substrate, a lower substrate, and a lower electrode disposed on the lower substrate. The signal transmitter and the signal receiver are synchronized by a 3D synchronization signal.