Prism Sheet for Glassless 3D Display Color Separation
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Solution Overview
Problem
Conventional glassless stereoscopic displays suffer from color separation and black stripes due to the enlargement and focusing of RGB sub-pixels by 3D optical plates like lenticular lens sheets or parallax barriers, which hinder the viewer's perception of a natural 3D image.
Innovation Solution
A glassless stereoscopic display is designed with a prism sheet comprising dove prisms arranged diagonally to rotate images by approximately 90°, preventing color separation and black stripes by ensuring RGB sub-pixels appear vertically rather than horizontally, and incorporating black masks to prevent crosstalk between adjacent pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a 3D optical plate (lenticular lens sheet or parallax barrier) is used to separate the image into left-eye and right-eye images, then glassless stereoscopic display is achieved without special viewing aids, but color separation and black stripes occur
Solution Approach 1:
A prism sheet is introduced as an intermediary optical element between the display panel and the 3D optical plate. The prism sheet rotates the image orientation by approximately 90 degrees, transforming the horizontal RGB sub-pixel arrangement into a vertical arrangement. This mediation prevents the 3D optical plate from enlarging and focusing the horizontal sub-pixels in a way that causes color separation, while still enabling glassless stereoscopic viewing.
Solution Approach 2:
The invention changes the orientation parameter of the image by introducing the prism sheet that rotates the image by approximately 90 degrees. This parameter change transforms the horizontal sub-pixel configuration into a vertical one, fundamentally altering how the 3D optical plate processes the image and eliminating the color separation effect while maintaining the stereoscopic display function.
2Productivity
If RGB sub-pixels are arranged horizontally and enlarged by the 3D optical plate, then the display can show left-eye and right-eye images in an alternating pattern, but color separation occurs when the viewer moves in the X-direction
Solution Approach 1:
The invention transitions from a horizontal arrangement of RGB sub-pixels to a vertical arrangement by introducing the prism sheet that rotates the image 90 degrees. This dimensional change in orientation prevents the horizontal color separation issue while maintaining the alternating left-eye and right-eye image pattern, as the vertical arrangement ensures that each sub-pixel's light is focused to the appropriate eye without horizontal color mixing.
3Reliability
If a black matrix is formed between RGB sub-pixels to prevent crosstalk, then adjacent pixels are separated, but black stripes appear when the image is enlarged and focused by the 3D optical plate
Solution Approach 1:
The prism sheet serves as an intermediary that rotates the image orientation, which changes the spatial relationship between the black matrix and the enlarged image regions. By rotating the image 90 degrees, the prism sheet redistributes the light intensity patterns, preventing the formation of periodic dark regions (black stripes) that would otherwise result from the enlarged black matrix structure, while still maintaining pixel isolation.
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 eliminates color separation and black stripes, allowing viewers to experience a natural 3D image without the need for special viewing aids, as the rotated image orientation maintains consistent light intensity and prevents horizontal color separation.
Implementation Method 1
a prism sheet disposed between the display panel and the 3D optical plate and having a plurality of prism elements regularly arranged to rotate an image provided by each of the pixels of the display panel by approximately 90°
Implementation Method 2
Each of the plurality of prism elements may have a first inclined surface on which an image is incident and a second inclined surface through which an image emerges
Data Source
AI summary
A glassless stereoscopic display, which does not produce color separation and black stripes, includes: a display panel displaying an image using a plurality of pixels; a 3D optical plate separating the image displayed by the display panel into a left-eye image and a right-eye image; and a prism sheet disposed between the display panel and the 3D optical plate and having a plurality of prism elements regularly arranged to rotate an image provided by each of the pixels of the display panel by approximately 90°.