Multi-View Display Backlight With Diffractive Light Guide Plates
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Solution Overview
Problem
Conventional multi-screen stereoscopic displays waste pixels due to biased viewing angles, leading to decreased image resolution and inefficient use of resources.
Innovation Solution
A multi-view display device utilizing stacked light guide plates with diffraction gratings to direct illumination beams into separate sub-beams, allowing for improved stereoscopic image resolution by optimizing light distribution and reducing unnecessary viewing regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional large viewing angle stereoscopic displays are used to produce large viewing angles, then the viewing angle is improved, but the image resolution decreases due to waste of pixels
Solution Approach 1:
The patent applies local quality by differentiating the light emission characteristics for different viewing regions. The first light guide plate generates first sub-beams for central viewing angles while the second light guide plate generates second sub-beams for side viewing angles. This allows each region to have optimized light distribution matched to its specific viewing requirements, improving overall image resolution while maintaining large viewing angle coverage.
Solution Approach 2:
The patent segments the backlight system into multiple independent light guide plates (first and second light guide plates), each responsible for specific viewing angle regions. The first light guide plate handles central views while the second light guide plate handles side views. This segmentation allows each component to be optimized for its specific function, preventing pixel waste and improving resolution in each region.
2Adaptability or versatility
If many pixels are used to form different viewing regions in conventional stereoscopic displays, then the viewing angle coverage is improved, but the image resolution decreases
Solution Approach 1:
The patent implements local quality by matching the number and distribution of pixels to the specific viewing requirements of different regions. Central viewing regions receive first sub-beams with appropriate pixel density, while side viewing regions receive second sub-beams with optimized pixel distribution. This localized optimization ensures sufficient resolution in each region without wasting pixels on regions that don't require them.
Solution Approach 2:
The patent introduces dynamic control through the light guide plates that can selectively direct light to different viewing regions. The system can adaptively allocate pixel resources based on the actual viewing situation, allowing high resolution when needed and reducing pixel usage when viewing angles are peripheral, thus maintaining versatility without compromising resolution.
3Adaptability or versatility
If conventional displays are used in multi-screen environments, then the display functionality is improved, but pixel efficiency decreases due to biased viewing angles
Solution Approach 1:
The patent applies local quality by optimizing light emission for specific viewing directions in multi-screen environments. The first light guide plate with first diffraction gratings is optimized for central viewing, while the second light guide plate with second diffraction gratings is optimized for side viewing. This localized optimization ensures that pixels are efficiently utilized for the actual viewing direction, reducing energy waste in multi-screen configurations.
Solution Approach 2:
The patent segments the display system into functionally independent light guide plates that can be selectively activated based on the viewing situation. In multi-screen environments, only the relevant light guide plate (first or second) needs to be actively optimized for its specific viewing angle range, improving overall pixel efficiency by avoiding the energy waste of attempting to serve all viewing directions simultaneously.
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
Enhances stereoscopic image resolution by efficiently utilizing pixels, particularly in multi-screen setups, by directing light beams to align with user viewing angles, thereby improving image clarity and reducing graininess.
Implementation Method 1
the first diffraction gratings diffract the first illumination beam into a plurality of first sub-beams in a plurality of first directions separated from each other
Implementation Method 2
the second diffraction gratings diffract the second illumination beam into a plurality of second sub-beams in a plurality of second directions separated from each other
Data Source
AI summary
A multi-view display device including a backlight module and a first light valve is provided. The backlight module includes a first light guide plate, a first light source, a second light guide plate, and a second light source. The first light guide plate has a plurality of first diffraction gratings. The first light source is disposed beside a first incident surface of the first light guide plate and configured to emit a first illumination beam. The second light guide plate has a plurality of second diffraction gratings. The second light source is disposed beside a second light incident surface of the second light guide plate and configured to emit a second illumination beam. The first light valve is disposed on the backlight module.