Patterned Retarder Stereoscopic Display Light Leakage Reduction
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Solution Overview
Problem
Stereoscopic image display devices using patterned retarders suffer from cross-talk issues and light leakage due to the viewing angle and the inability of carbon black-based black matrices to provide adequate insulation and light blocking.
Innovation Solution
The implementation of a stereoscopic image display device with a black stripe on the color filter substrate and a patterned retardation film, along with dummy pixels and lines, and a light leakage blocking layer, which reduces cross-talk and light leakage by using non-transparent conductive materials and transparent column spacers to enhance viewing angles and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a patterned retarder is used to achieve three-dimensional display, then display quality and brightness are improved, but cross-talk occurs between left and right eye images when viewed from certain angles
Solution Approach 1:
The display panel is segmented into active display areas and non-active dummy pixel areas. The dummy pixels are strategically positioned at edges and corners to block light leakage paths without interfering with the main display content, thus reducing cross-talk while preserving display brightness.
Solution Approach 2:
A light leakage blocking layer is introduced as an intermediary component between the backlight unit and the display panel. This layer specifically targets and blocks light leakage in non-active areas without affecting the light transmission in active display areas, thereby reducing cross-talk while maintaining display quality.
2Object-affected harmful factors
If carbon black is used for the black matrix to block light, then light reflection is reduced, but insulation characteristics are insufficient and light leakage cannot be blocked
Solution Approach 1:
The black matrix is constructed using a composite material system combining carbon black with additional insulating materials. This composite structure maintains the light-blocking and anti-reflection properties of carbon black while adding the necessary insulation characteristics to prevent light leakage effectively.
3Object-affected harmful factors
If dummy pixels and light leakage blocking layers are added to reduce light leakage, then display quality is improved, but device complexity increases
Solution Approach 1:
The light leakage blocking layer is merged with existing structural components of the display panel, such as the black matrix or edge regions, rather than being implemented as a completely separate component. This integration approach reduces device complexity while maintaining the light leakage blocking function.
Solution Approach 2:
The dummy pixels serve multiple functions: they block light leakage at panel edges, provide structural support, and can potentially be used for additional display functions. This multi-functionality reduces the need for separate components, thereby simplifying the overall device structure.
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 effectively reduces cross-talk and light leakage, improving the viewing angle and display quality by blocking light and static electricity, while maintaining the manufacturing simplicity and avoiding additional processes.
Implementation Method 1
a patterned retarder 17 attached to the display panel 20... has a first retarder for selectively transmitting only first polarizing light and a second retarder for selectively transmitting only second polarizing light
Implementation Method 2
The patterned retarder 17 is attached to the first polarizing plate 16a, and has a first retarder for selectively transmitting only first polarizing light and a second retarder for selectively transmitting only second polarizing light
Implementation Method 3
a black stripe on the color filter substrate on a side away from the array substrate, the black stripe disposed at portions corresponding to the non-active area along edges of the active area
Implementation Method 4
a liquid crystal layer 15 between the array substrate 10 and the color filter substrate 12
Data Source
AI summary
A stereoscopic image display device includes an array substrate defining an active area and a non-active area surrounding the active area; a gate line on the active area and the non-active area; a gate pad on the non-active area; a dummy line defining a dummy pixel on the non-active area by crossing the gate line; a color filter substrate disposed opposing the array substrate with a liquid crystal layer therebetween, the color filter substrate having a color filter and a dummy color filter at a portion corresponding to the dummy pixel; a black stripe on the color filter substrate on a side away from the array substrate, the black stripe disposed at portions corresponding to the non-active area along edges of the active area; and a patterned retardation film formed over the black stripe.