Backlight Direction Control for Naked Eye 3D Displays
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Solution Overview
Problem
Naked eye stereoscopic display methods using parallax separators face challenges with degraded display resolution as the number of view point images increases, and limited observation areas for stereoscopic viewing.
Innovation Solution
A display apparatus that time-divisionally displays multiple view point images and controls the exit direction of light from a backlight to synchronize with the display unit's time division, allowing continuous stereoscopic viewing across multiple observation areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple view point images are spatially divided and displayed on a two-dimensional display panel using a parallax separator, then stereoscopic viewing is achieved, but the display resolution of each view point image degrades
Solution Approach 1:
The display panel is divided into multiple observation areas (main lobe and side lobes) with different display resolutions. The parallax separator is divided into corresponding segments that direct light from different regions of the display panel to different observation areas, enabling multiple view point images to be displayed simultaneously without uniformly degrading all resolutions
Solution Approach 2:
Different observation areas are provided with different display resolutions tailored to their specific viewing requirements. The main lobe receives high-resolution images for primary viewing, while side lobes receive appropriately resolved images for additional viewing angles, optimizing the overall system performance rather than using uniform resolution throughout
2Adaptability or versatility
If the number of view point images is increased to enhance stereoscopic viewing, then more observation areas are created, but the display resolution of each individual view point image becomes more degraded
Solution Approach 1:
The system segments the display into multiple observation areas with dedicated view point images for each area. By dividing the display panel and parallax separator into corresponding segments, the system can provide multiple view points simultaneously while maintaining acceptable resolution in each segment through targeted light direction control
Solution Approach 2:
The patent introduces a temporal dimension by switching between different view point images in different time slots. This allows the system to present multiple view points sequentially rather than simultaneously, reducing the resolution degradation that would occur if all view points were displayed at full resolution at the same time
3Adaptability or versatility
If a parallax separator is placed on the image display side of the display panel, then stereoscopic display is enabled, but the observation areas are limited
Solution Approach 1:
The parallax separator is divided into multiple segments that correspond to different observation areas (main lobe and side lobes). Each segment directs light from specific regions of the display panel to specific observation areas, enabling multiple observation areas to coexist with adequate viewing angles and resolution
Solution Approach 2:
The patent extends observation areas into the temporal dimension by switching between different view point images and light exit directions over time. This allows observation areas to be dynamically expanded beyond the spatial limitations of a static parallax separator configuration
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
This approach increases the number of view points enabling stereoscopic viewing and enlarges observation areas by effectively managing light direction and display divisions, enhancing the overall stereoscopic experience.
Implementation Method 1
a backlight that irradiates the display unit with image display light, and the exit direction of light is switched between N directions
Data Source
AI summary
A display apparatus includes a display unit that time-divisionally displays a plurality of view point images in N divisions, N being an integer equal to or more than 2, a backlight that irradiates the display unit with image display light, and a separation unit that separates M view point images displayed in the same time slot in the display unit, M being an integer equal to or more than 2. The backlight controllably switches the exit direction of light time-divisionally in synch with the timing of time division display by the display unit, the backlight controllably switching the exit direction of light between N directions.