Elastic Membrane Prism Array for 3D Display Color Separation
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Solution Overview
Problem
Conventional glassless stereoscopic displays using parallax barriers or lenticular lens sheets suffer from color separation and black stripes, limiting the viewer's ability to see a natural 3D image due to the separation of RGB sub-pixels when the viewer moves their head.
Innovation Solution
A stereoscopic display device incorporating a display panel and a three-dimensional optical plate with an elastic membrane prism array, comprising a prism body with chambers and a piston, using index-matching oil, which allows for dynamic control of light paths and reduces color separation by adjusting the angle of the prism plate, thereby enhancing the viewing experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional 3D optical plate (lenticular lens sheet or parallax barrier) is used to separate images into left-eye and right-eye images, then stereoscopic 3D display is achieved, but color separation and black stripes occur when the viewer moves their head
Solution Approach 1:
The patent employs a liquid crystal prism array where each prism can dynamically change its refractive index and light deflection angle in response to viewer position. This dynamic adjustment allows the optical plate to continuously adapt and redirect light from RGB sub-pixels to the correct eye, eliminating color separation and black stripes that occur in static conventional 3D optical plates when viewers move their heads.
Solution Approach 2:
The invention changes the optical parameters (refractive index) of the prism material by using liquid crystal that can alter its properties electrically. By controlling the refractive index of each liquid crystal prism, the system can dynamically adjust light paths to maintain proper color alignment for left and right eyes regardless of viewer position, thereby resolving the color separation issue.
2Measurement precision
If a lenticular lens sheet is used to enlarge and focus images, then left-eye and right-eye images can be focused on respective eyes, but RGB sub-pixels are also enlarged and focused at the viewing distance causing color separation
Solution Approach 1:
The patent applies different optical properties to different parts of the display system. Each liquid crystal prism is individually controlled to have specific refractive index values that differ from the conventional uniform lenticular lens sheet. This local differentiation allows each prism to precisely control light from corresponding RGB sub-pixels, ensuring that only the intended eye receives light from each sub-pixel, thereby eliminating color separation while maintaining focusing accuracy.
3Ease of operation
If a parallax barrier is used to separate images, then left-eye and right-eye images can be provided without special viewing aids, but black stripes and color separation occur
Solution Approach 1:
The patent replaces the static parallax barrier with a dynamic liquid crystal prism array. Each prism can independently adjust its light deflection angle based on viewer position, allowing the system to maintain proper image separation without the fixed geometric constraints of a parallax barrier. This dynamic capability eliminates black stripes and color separation while preserving the glassless display advantage.
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
The solution effectively reduces color separation and black stripes, allowing for a wider viewing angle and improved visibility of a natural 3D image without the need for special viewing aids, enhancing the overall stereoscopic display experience.
Implementation Method 1
Each of the prisms includes a liquid crystal which changes a refractive index according to an applied voltage
Implementation Method 2
an elastic membrane which deforms according to a pressure change
Implementation Method 3
The liquid material may include index-matching oil
Data Source
AI summary
A stereoscopic display is provided. The stereoscopic display is able to control a viewing position and make a viewing angel wide. On top of a display panel, an image is provided through a plurality of pixels and is separated to a left-eye image and a right-eye image by a lenticular lens. An elastic membrane prism array controls an angle of emitted light. An elastic membrane prism array is disposed on the lenticular lens or on and under the lenticular lens. The elastic membrane prism array includes a prism body having a first chamber and a second chamber, a wall disposed between the first and second chamber, a prism plate connected to the wall, a piston adapted for moving back-and-forth and a transporting tube disposed between the piston and the prism body.