Dynamic Barrier Panel for Variable Focal Length 3D Displays
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Solution Overview
Problem
Conventional non-glass type auto-stereoscopic 3D display apparatuses require observers to maintain a fixed distance from the display to view 3D images effectively, limiting flexibility in focal length adjustment.
Innovation Solution
A display apparatus with a barrier panel that dynamically adjusts barrier patterns and slit patterns based on a selection signal or distance signal, allowing for multiple focal lengths by dividing pixel columns into groups and controlling the intervals and widths of these patterns to direct left and right eye images appropriately to the viewer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a parallax barrier panel with fixed slit positions is used, then the 3D image can be displayed clearly, but the observer must maintain a fixed distance from the display
Solution Approach 1:
The barrier panel transitions from a static structure with fixed slit positions to a dynamic structure where slit positions and intervals can be adjusted. The patent implements this by making the barrier patterns movable or reconfigurable, allowing the system to adapt to different viewing distances while maintaining 3D image quality. This resolves the contradiction by enabling the barrier panel to dynamically change its configuration based on observer position.
Solution Approach 2:
The patent changes the physical parameters of the barrier panel, specifically the positions and intervals of the slits, to accommodate different viewing distances. By adjusting these parameters dynamically, the system maintains optimal 3D image clarity regardless of the observer's distance from the display, thus resolving the contradiction between image quality and viewing flexibility.
2Stability of the object's composition
If the barrier panel slits are fixed in position, then the optical path for left and right eye images is stable, but multiple focal lengths cannot be provided
Solution Approach 1:
The barrier panel is designed with dynamic adjustability, allowing the slit positions and intervals to be modified while maintaining stable optical paths for each configuration. This enables the system to provide multiple focal lengths by switching between different stable configurations, resolving the contradiction between optical stability and focal length versatility.
Solution Approach 2:
The barrier panel is divided into multiple independently controllable segments or regions, each capable of forming different slit patterns. This segmentation allows the system to create multiple stable optical paths corresponding to different focal lengths, thereby providing both stability and versatility simultaneously.
3Adaptability or versatility
If pixel columns are divided into groups for sequential display, then the barrier panel can form different patterns, but the system complexity increases
Solution Approach 1:
The pixel columns are divided into distinct groups that can be independently controlled to display different images (left-eye, right-eye, or mixed). This segmentation simplifies the control logic by creating clear, manageable units that can be selectively activated, reducing overall system complexity while enabling diverse barrier patterns.
Solution Approach 2:
The display system uses periodic alternation between different pixel column group configurations to generate various barrier patterns. By implementing rhythmic switching between predefined patterns, the system achieves pattern variety through simple temporal modulation rather than complex simultaneous control, thereby reducing device complexity.
Data Source
AI summary
A display apparatus includes a display panel, a barrier panel, and a barrier panel controller. The display panel includes a plurality of pixel columns divided into a first pixel column groups and a second pixel column groups based on a selection signal used to determine a focal length of a three-dimensional image. The barrier panel forms a plurality of first barrier patterns spaced apart from each other and a plurality of second barrier patterns spaced apart from each other. The barrier panel controller controls a distance between the first barrier patterns and a distance between the second barrier patterns based on the selection signal.