3D Display Light Shielding Bars Reduce Interference
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Solution Overview
Problem
Current 3D display technologies, such as FPR, face limitations in enhancing the view angle in the vertical direction due to light interference from adjacent pixels, which affects the immersive experience and brightness.
Innovation Solution
Incorporating a light shielding layer with alternating light shielding bars between phase retarding bars in a 3D display device, which reduces light interference and maintains high brightness by optimizing the aperture ratio and material composition, such as black polymer or liquid crystal materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a phase retarder with alternating first and second phase retarding bars is used to achieve 3D display effect, then the polarization separation for left and right eyes is improved, but light interference from adjacent pixels occurs which limits the view angle in the vertical direction
Solution Approach 1:
A light shielding layer is introduced as an intermediary element between the phase retarder and the viewer. This layer includes light shielding bars positioned at interfaces between adjacent phase retarding bars of different types. The light shielding bars block stray light from adjacent pixels while allowing light from corresponding pixels to pass through, thereby resolving the light interference problem without compromising the polarization separation quality
Solution Approach 2:
The light shielding layer is selectively positioned only at the interfaces between adjacent phase retarding bars where light interference occurs. The shielding bars are locally arranged to block specific interference paths while maintaining transparency in other areas. This localized approach preserves the overall brightness and polarization separation while eliminating harmful light interference from adjacent pixels
2Object-affected harmful factors
If light shielding bars are added to reduce light interference, then the view angle in the vertical direction is enhanced, but the aperture ratio decreases which may degrade brightness
Solution Approach 1:
The aperture ratio of the light shielding layer is optimized by adjusting the width and spacing parameters of the light shielding bars. The design achieves a balance where the bars are wide enough to effectively block light interference from adjacent pixels but narrow enough and sufficiently spaced to maintain high aperture ratio (90% or higher). This parameter optimization ensures both light interference reduction and brightness preservation
Solution Approach 2:
The light shielding layer is designed with a porous-like structure consisting of discrete light shielding bars separated by transparent spaces. This structure allows light to pass through the gaps between bars while the bars themselves block interference light. The high aperture ratio is achieved by optimizing the proportion of transparent spaces to total area, effectively creating a selective light filtering structure that maintains brightness
3Object-affected harmful factors
If the light shielding layer is positioned at the display side of the phase retarder, then light interference is reduced, but the device structure becomes more complex
Solution Approach 1:
The light shielding layer is integrated with the phase retarder structure by positioning it at the display side and adhering it to the phase retarder substrate. The light shielding bars are formed using the same manufacturing processes as the phase retarding bars, allowing both structures to be produced in the same production line. This merging approach reduces assembly steps and overall device complexity while maintaining the light interference reduction function
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 enhances the view angle in the vertical direction without degrading brightness, providing an improved immersive 3D experience and a more compact display device structure.
Implementation Method 1
a phase retarder arranged at a display side of the display panel, the phase retarder including first phase retarding bars and second phase retarding bars arranged alternately, wherein each of the first phase retarding bars corresponds to one row of left eye pixels for converting a light emitted from the one row of left eye pixels into a first polarized light; each of the second phase retarding bars corresponds to one row of right eye pixels for converting a light emitted from the one row of right eye pixels into a second polarized light
Implementation Method 2
a light shielding layer arranged at the display side of the display panel, the light shielding layer including a plurality of light shielding bars spaced apart from each other and wherein each of the light shielding bars is arranged at an interface between adjacent first and second phase retarding bars
Data Source
AI summary
The present disclosure provides a 3D display device and a 3D display apparatus. The 3D display device includes: a display panel; and a phase retarder arranged at a display side of the display panel, the phase retarder including first phase retarding bars and second phase retarding bars arranged alternately, wherein the 3D display device further includes a light shielding layer arranged at the display side of the display panel, the light shielding layer including a plurality of light shielding bars arranged to be spaced apart from each other and wherein each of the light shielding bars is arranged at an interface between adjacent first and second phase retarding bars.