Dual-Frequency Liquid Crystal Shutter for 3D Display
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Solution Overview
Problem
Conventional 3D display apparatuses suffer from cross-talk and high power consumption, leading to a poor viewing experience and increased energy usage.
Innovation Solution
A display apparatus incorporating a shutter panel with dual-frequency liquid crystals, where the polarity of dielectric constant anisotropy changes with driving voltage frequency to selectively delay the phase of left-eye and right-eye images, reducing cross-talk and power consumption by rapidly switching between operation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional glass-type or glassless-type methods are used to display stereoscopic images, then 3D imaging capability is achieved, but cross-talk occurs resulting in image ghosting and poor viewing experience
Solution Approach 1:
The patent applies dynamics by using dual-frequency liquid crystals that can dynamically change their molecular orientation in response to different frequency voltages. The liquid crystals switch between parallel alignment (for left-eye image) and perpendicular alignment (for right-eye image), enabling dynamic control of light polarization to prevent cross-talk while maintaining reliable 3D imaging quality.
Solution Approach 2:
The invention changes the frequency parameter of the applied voltage to control liquid crystal orientation. By applying high-frequency voltage, the liquid crystals align parallel to the electrode; by applying low-frequency voltage, they align perpendicular to the electrode. This parameter change enables selective phase delay for left and right eye images, eliminating cross-talk and improving 3D imaging reliability.
2Reliability
If conventional 3D display methods are used, then stereoscopic image display is achieved, but power consumption is high
Solution Approach 1:
The patent employs periodic action by alternating between high-frequency and low-frequency voltage applications in synchronization with the display of left-eye and right-eye images. The liquid crystals are switched to appropriate orientations only during the required time intervals for each eye's image, rather than maintaining a fixed state. This periodic switching reduces overall power consumption while achieving reliable stereoscopic image display.
3Object-affected harmful factors
If dual-frequency liquid crystals are used with frequency-based voltage control, then phase delay is selectively applied to prevent cross-talk, but device complexity increases
Solution Approach 1:
The patent uses parameter changes by exploiting the inherent dual-frequency characteristics of the liquid crystal material itself. Rather than adding complex mechanical shutters or multiple optical layers, the invention changes the electrical frequency parameter to control the liquid crystal orientation. This approach prevents cross-talk through material property modulation, keeping the device structure relatively simple while achieving effective cross-talk prevention.
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 effectively prevents cross-talk and reduces power consumption, enhancing the 3D viewing experience while minimizing energy usage compared to conventional systems.
Implementation Method 1
A polarity of dielectric constant anisotropy of the liquid crystals is changed according to a frequency of the driving voltage to selectively delay a phase of the left-eye image or a phase of the right-eye image
Implementation Method 2
selectively delay a phase of the left-eye image or a phase of the right-eye image
Implementation Method 3
In response to a high frequency voltage being applied to the first electrode and the second electrode, the dual-frequency liquid crystals align in a first direction relative to the first electrode, and the first image is phase delayed. In response to a low frequency voltage being applied to the first electrode and the second electrode, the dual-frequency liquid crystals align in a second direction relative to the first electrode, and the first image is not phase delayed
Data Source
AI summary
A display apparatus includes a shutter panel and a display panel that alternately displays a left-eye image and a right-eye image in a 3D mode. The shutter panel includes dual-frequency liquid crystals in which a polarity of dielectric constant anisotropy is changed according to a frequency of the driving voltage to selectively delay a phase of the left-eye image or the right-eye image, which pass through the dual-frequency liquid crystals. The dual-frequency liquid crystals have a fast response speed to the low voltage, and thus a cross-talk phenomenon between the left-eye image and the right-eye image may be prevented.