3D Display Light-Shielding Barrier Position Adjustment
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Solution Overview
Problem
Existing 3D video display devices using parallax barriers face complexity in maintaining optimal viewing positions, as movement of the observer requires intricate control of light-shielding barriers and image switching, making it difficult to maintain clear 3D images.
Innovation Solution
A display device with a light-shielding mechanism using a liquid crystal panel that includes image transmitting and non-transmitting portions, which adjusts its position based on observer detection to prevent crosstalk by moving the image transmitting portion by specific fractions of the light-shielding pitch, allowing for seamless 3D image display during observer movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If movement of the light-shielding barrier is controlled along with switching of input of right-eye images and left-eye images into pixels, then 3D video can be viewed at the position of the movement destination, but processing becomes extremely complicated
Solution Approach 1:
The patent extracts the image transmission function from the pixel switching mechanism and concentrates it in the light-shielding barrier. By making the barrier itself selectively transparent or opaque in specific regions, the system eliminates the need for complex coordination between barrier movement and image input switching, thereby reducing processing complexity while maintaining viewing position adaptability
Solution Approach 2:
The light-shielding barrier is designed with dynamically controllable transparency regions that can be adjusted in real-time. This dynamic capability allows the barrier to adapt to observer movement by selectively transmitting or blocking light in specific areas, providing viewing position adaptability without requiring complex processing of multiple control signals
2Ease of manufacture
If a parallax barrier or lenticular lens is disposed on the display screen to separate light from right-eye and left-eye images, then 3D video can be viewed without special glasses, but the optimum observation position is fixed and 3D video cannot be viewed when the observer moves
Solution Approach 1:
The light-shielding barrier incorporates dynamically adjustable transparency regions that can shift and resize in response to detected observer positions. This dynamic adjustment maintains the glasses-free 3D display functionality while enabling the system to adapt to different viewing positions, thereby achieving both ease of manufacture and viewing position flexibility
Solution Approach 2:
The system employs detection means to sense the observer's position and feeds this information back to the light-shielding barrier control. This feedback mechanism enables the barrier to automatically adjust its transparency pattern to maintain proper 3D image separation regardless of observer movement, achieving viewing position flexibility while keeping the glasses-free display structure simple
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 enables reliable and high-performance 3D image display by simplifying the control of the light-shielding barrier, allowing observers to maintain clear 3D vision without complex switching of images, even when moving, thereby eliminating crosstalk and moire issues.
Implementation Method 1
the light-shielding means is formed by a liquid crystal panel... it is possible to move positions of the image transmitting portion and the image non-transmitting portion by a given distance simply and positively by opening and closing liquid crystal shutters formed by respective pixels of the liquid crystal panel
Data Source
AI summary
A display device includes: an image display means for displaying left-eye images and right-eye images alternately; a light-shielding means for generating an effect of binocular parallax in images displayed by the image display means; and a detection means for detecting a position of an observer, wherein the light-shielding means includes an image transmitting portion through which images of the image display means are transmitted and an image non-transmitting portion through which images are not transmitted, which moves a position of the image transmitting portion by ½, ¼ or ⅛ of a light-shielding portion pitch prescribed by an arrangement interval of the image transmitting portion based on a detected result of the detection means.