Parallax Adjusting Unit Dynamic Slit Width Control
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Solution Overview
Problem
Existing display devices that use parallax barriers for stereoscopic viewing face challenges in controlling image luminance and aperture ratio, especially when adjusting for observer position changes, leading to potential crosstalk and limited viewing range.
Innovation Solution
A display device with a parallax adjusting unit that includes alternately arranged transmissive and non-transmissive regions, where the width of these regions can be dynamically changed based on observer position information to optimize stereoscopic viewing and reduce crosstalk, using a control unit to adjust the positions and widths of transmissive and non-transmissive regions in the barrier unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the parallax barrier controls slit widths by equally changing widths of all slit portions to increase the front-back viewing range, then the stereoscopic viewing range in the front-back direction is improved, but the aperture ratio changes significantly making it difficult to control displayed image luminance
Solution Approach 1:
The patent applies local quality by differentiating the width adjustment strategy across different slit portions. Instead of uniformly changing all slit widths, the control unit adjusts widths of specific slit portions (first through fifth slit portions) differently based on their positions and functions, allowing independent optimization of viewing range and luminance control in different regions of the parallax barrier
Solution Approach 2:
The patent implements dynamics by enabling real-time adjustment of slit widths based on detected observer position. The control unit dynamically changes the widths of slit portions in response to observer distance information, allowing the system to adapt to varying viewing conditions while maintaining appropriate aperture ratios for luminance control
2Illumination intensity
If the parallax barrier uses fixed slit widths to maintain stable aperture ratio and luminance control, then image luminance is preserved, but the viewing range in the front-back direction is limited
Solution Approach 1:
The system transitions from fixed to dynamic slit width control. The control unit adjusts the widths of slit portions based on real-time observer position detection, enabling the parallax barrier to adapt to different viewing distances while maintaining appropriate aperture ratios for luminance control
Solution Approach 2:
The patent changes the physical parameter of slit width dynamically. By varying the widths of different slit portions in response to observer position, the system optimizes both viewing range and luminance control, resolving the contradiction between fixed parameters for stability and variable parameters for adaptability
3Adaptability or versatility
If the parallax barrier adjusts slit widths to increase viewing range, then the front-back viewing distance range is improved, but crosstalk between left and right eye images increases
Solution Approach 1:
The patent applies local quality by assigning different width adjustment characteristics to different slit portions. The control unit selectively adjusts the widths of specific slit portions (first through fifth slit portions) based on their positional relationships with the observer's eyes, optimizing the balance between viewing range and crosstalk prevention in different regions
Solution Approach 2:
The system uses feedback from observer position detection to dynamically adjust slit widths. The control unit receives observer position information and uses this feedback to optimize the widths of slit portions in real-time, preventing crosstalk while maximizing viewing range
Data Source
AI summary
A display device includes a display unit including a display plane that displays an image and a parallax adjusting unit that is arranged to face the display unit and be able to switch a plurality of transmissive regions transmitting light and a plurality of non-transmissive regions restricting light, in which the transmissive regions and the non-transmissive regions are alternately in a first direction, and width of at least one transmissive region in the first direction among the plurality of transmissive regions or width of at least one non-transmissive region in the first direction among the plurality of non-transmissive regions is changed based on input information.