Stereoscopic Display Black Stripe Width Variation
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Solution Overview
Problem
Stereoscopic image display devices face challenges with cross-talk errors due to viewing position and manufacturing errors, particularly at the upper and lower ends of the screen, which affect the display quality and brightness.
Innovation Solution
The solution involves increasing the line width of black stripes on the color filter substrate, specifically towards the upper and lower ends of the screen, to compensate for total pitch and attaching errors of the patterned retarder film, thereby preventing cross-talk and improving viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the black matrix is enlarged to broaden the viewing angle and prevent cross-talk, then the viewing angle and cross-talk prevention are improved, but the opening aperture ratio and brightness are lowered
Solution Approach 1:
The patent applies local quality by making the black stripe width non-uniform across the display screen. Specifically, the black stripes are wider at the upper and lower ends of the screen and narrower in the middle portion. This localized variation in black stripe width allows for improved cross-talk prevention at the edges where viewing angles are more problematic, while preserving brightness in the central viewing area where cross-talk is less of an issue.
2Reliability
If the width of the black matrix is enlarged to broaden the viewing angle, then the viewing angle is improved, but the opening aperture ratio is lowered
Solution Approach 1:
The patent implements local quality by varying the black stripe width according to position on the screen. The black stripes are made wider at the upper and lower ends where viewing angle problems are more severe, and narrower in the middle portion where viewing angle is naturally better. This localized approach improves viewing angle where needed while preserving opening aperture ratio in the central area.
3Manufacturing precision
If the black stripe width is increased to compensate for manufacturing errors, then the compensation effect is improved, but the opening aperture ratio is lowered
Solution Approach 1:
The patent applies local quality by making the black stripe width position-dependent. The black stripes are wider at the upper and lower ends of the screen where manufacturing errors in patterned retarder film attachment have greater impact on viewing quality, and narrower in the middle portion. This provides targeted error compensation where it is most needed while minimizing the overall reduction in opening aperture ratio.
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 effectively reduces cross-talk errors and enhances the viewing experience by maintaining high display quality and brightness, even at wider angles, while minimizing the impact of manufacturing errors on the patterned retarder film attachment.
Implementation Method 1
The patterned retarder type display device accomplishes three-dimensional display by using polarization properties of the patterned retarder on the display panel and those on the glasses. This type of display device alternately displays a right-eye image and left-eye image on the display panel, and switches the polarizing properties from the polarizing glasses though the patterned retarder.
Data Source
AI summary
A stereoscopic image display device, includes an array substrate having a thin film transistor; a color filter substrate opposing the array substrate and having black matrixes disposed in first and second directions; a plurality of black stripes formed on the color filter substrate and corresponding to the black matrix in the first direction; a patterned retarder film formed on the plurality of black stripes; and wherein line widths of the plurality of black stripes increase towards first and second ends in the second direction. Due to the invention, the cross-talk problem can be improved.