Stereoscopic Display Pattern Retarder Vertical Viewing Angle
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Solution Overview
Problem
Stereoscopic image display devices using the pattern retarder method suffer from a narrow vertical viewing angle due to 3D crosstalk, where users see both left-eye and right-eye images overlapping at angles greater than a predetermined vertical viewing angle.
Innovation Solution
A stereoscopic image display device with a display panel and a pattern retarder featuring light absorption patterns on a substrate, where the long axis direction of the light absorption patterns aligns with the retarders, preventing unwanted light from passing through, and a light absorption film is used between the substrate and the pattern retarder to absorb stray light, ensuring only left or right circularly polarized light reaches the user's eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pattern retarder is used to display stereoscopic images, then the binocular parallax image can be displayed with polarization characteristics, but the vertical viewing angle becomes narrow due to 3D crosstalk
Solution Approach 1:
The invention divides the light absorption function into specific patterns (first and second light absorption patterns) that are selectively positioned to block crosstalk light paths while allowing desired light to pass through, thereby segmenting the optical control to resolve the viewing angle limitation
Solution Approach 2:
The invention introduces a light absorption film as an intermediary element between the display panel and pattern retarder. This film contains specific light absorption patterns that act as mediators to block unwanted crosstalk light while permitting the desired polarized light to reach the viewer, thus expanding the vertical viewing angle
2Adaptability or versatility
If light absorption patterns are added to prevent crosstalk, then the vertical viewing angle increases, but the device structure becomes more complex
Solution Approach 1:
The invention merges the light absorption function with the existing pattern retarder structure by integrating light absorption patterns into a film that can be combined with the retarder layer, rather than adding completely separate components. This merging approach reduces overall structural complexity while achieving the desired viewing angle expansion
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 configuration significantly widens the vertical viewing angle by preventing 3D crosstalk, allowing users to view stereoscopic images without overlap even at angles beyond the previous limit, enhancing the display's effectiveness.
Implementation Method 1
a light absorption film is used between the substrate and the pattern retarder to absorb stray light
Implementation Method 2
The left-eye image of the display panel DIS is converted into a left circularly polarized light after passing through the pattern retarder PR, and the right-eye image is converted into a right circularly polarized light after passing through the pattern retarder PR
Data Source
AI summary
Embodiments of the invention relate to a stereoscopic image display device using a pattern retarder method, which can widen a vertical viewing angle when watching a stereoscopic image, and a method for fabricating the same. The stereoscopic image display device comprises: a display panel having data lines, gate lines crossing the data lines, and a plurality of pixels formed in cell areas defined by the crossings of the data lines and the gate lines; and a pattern retarder having a first retarder for passing only left circularly polarized light therethrough and a second retarder for passing only right circularly polarized light therethrough, wherein a plurality of light absorption patterns are formed in a first substrate of the display panel, and the long axis direction of the light absorption patterns is the same as the long axis direction of the first retarder and the second retarder.