Adjustable Parallax Barrier for 3D Display Distance Adaptation
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Solution Overview
Problem
Conventional parallax barrier systems for three-dimensional displays fail to maintain a three-dimensional view when the distance between the viewer's eyes and the displayed image deviates from a predetermined distance, as the area on the LCD panel for the right and left eye images does not correspond correctly with the viewer's eyes through the slits of the parallax barrier.
Innovation Solution
A display device that includes a display unit dividing left and right eye images into vertically elongated stripes, a barrier formation unit forming a parallax barrier, and a distance information acquisition unit that adjusts the slit width or pattern of the parallax barrier based on the viewer's distance to ensure correct image alignment for both eyes, allowing for a wider range of viewing distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the parallax barrier is fixed with a predetermined slit width and pattern, then the three-dimensional view is clear at the optimal viewing distance, but the three-dimensional view deteriorates when the viewer's distance deviates from the predetermined distance
Solution Approach 1:
The patent applies the dynamics principle by making the parallax barrier adjustable rather than fixed. The barrier's slit width and pattern can be dynamically changed based on the detected viewer distance, allowing the system to adapt to different viewing conditions while maintaining clear three-dimensional images at various distances
Solution Approach 2:
The patent implements parameter changes by modifying the physical parameters of the parallax barrier (slit width, barrier pattern, barrier position) according to the viewer's distance. When the viewer moves closer or farther, the system adjusts these parameters to recalculate and reposition the left and right eye image areas, ensuring proper correspondence between the displayed images and the viewer's eyes at any distance
2Adaptability or versatility
If the slit width of the parallax barrier is increased to enlarge the visible range, then the viewing distance range is extended, but the image alignment precision deteriorates
Solution Approach 1:
The system dynamically adjusts the slit width based on the detected viewer distance rather than using a fixed wide slit. This allows the slit width to be optimized for each specific viewing distance, maintaining image alignment precision while still accommodating a range of distances through continuous adjustment
Solution Approach 2:
The patent changes the slit width parameter according to the viewer's distance. By recalculating the appropriate slit width for each distance and adjusting the barrier accordingly, the system prevents the degradation of image alignment precision that would occur with a permanently increased slit width
3Measurement precision
If the parallax barrier pattern is fixed to ensure correct image correspondence at one distance, then the image alignment is precise at that distance, but the system cannot adapt to different viewing distances
Solution Approach 1:
The patent makes the barrier pattern dynamic by detecting the viewer's distance and automatically switching between different pre-stored barrier patterns or generating new patterns. This allows the system to maintain precise image alignment at various distances without being limited to a single fixed pattern
Solution Approach 2:
The system changes the barrier pattern parameters (slit width, barrier width, pitch, position) based on the detected viewing distance. By storing multiple barrier patterns corresponding to different distances or calculating optimal patterns dynamically, the system adapts the barrier configuration to match the viewer's position, ensuring correct image correspondence at any distance
Data Source
AI summary
A three-dimensional display device includes a display unit that displays a left eye image and a right eye image by dividing the images thereof into a plurality of vertically elongated stripes of images and by alternately arranging the divided left eye image and the divided right eye image in a horizontal direction, a barrier formation unit that forms a parallax barrier in front of the display unit, the parallax barrier including a pattern of a plurality of slits to selectively transmit the left eye image and the right eye image towards spatially different points, respectively, that correspond to a left eye and a right eye of the viewer, and a distance measurement unit that measures a distance between the display unit and a viewer viewing the display unit, wherein the barrier formation unit changes the pattern of the slits in the parallax barrier in accordance with the distance measured by the distance measurement unit.