3D Display Apparatus with Switchable Grating and Polarizer
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Solution Overview
Problem
3D displays in prior art can only utilize one 3D displaying mode, limiting the ability to switch between glasses type and naked-eye type modes, which affects the depth of field perception and crosstalk.
Innovation Solution
A 3D display apparatus with a liquid crystal display panel, polarizing filters, and a grating functional structure that can switch between different grating unit orientations and polarizing filter states to enable both glasses type and naked-eye type 3D displaying modes, using liquid crystal devices to control the grating and polarizing filter functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single 3D displaying mode is used, then the device structure is simple, but the adaptability to different viewing situations is limited
Solution Approach 1:
The patent implements a dual-mode 3D display system where the same display device can operate in both glasses-type and naked-eye type 3D modes. This is achieved by integrating multiple gratings with different orientations and a switchable polarizing filter structure, allowing the display to adapt to different viewing situations without requiring separate dedicated devices for each mode.
Solution Approach 2:
The patent employs dynamically switchable optical elements including a polarizing filter structure that can change its polarization state and multiple gratings that can be selectively activated. This dynamic switching capability allows the system to transition between different 3D display modes, enabling adaptability while managing complexity through controlled activation of specific components based on the desired mode.
2Ease of operation
If glasses type 3D displaying mode is used, then crosstalk is reduced, but the user must wear glasses which reduces ease of operation
Solution Approach 1:
The patent divides the display into multiple viewing zones using separate gratings for different modes. The first grating is optimized for glasses-type viewing with fine pitch to minimize crosstalk, while the second grating is optimized for naked-eye type viewing with larger pitch. This segmentation allows each zone to be optimized for its specific mode, reducing crosstalk in glasses mode while enabling glass-free viewing in naked-eye mode.
Solution Approach 2:
Different regions of the display employ different grating structures and orientations tailored to their specific viewing mode requirements. The polarizing filter structure is selectively applied to different regions to optimize performance for either glasses-type or naked-eye type viewing, allowing local optimization of crosstalk reduction and viewing comfort.
3Object-affected harmful factors
If naked-eye type 3D displaying mode is used, then ease of operation is improved, but crosstalk increases
Solution Approach 1:
The patent uses asymmetric grating structures with different orientations and pitches for different viewing modes. The first grating has a first orientation optimized for glasses-type viewing, while the second grating has a second orientation optimized for naked-eye type viewing. This asymmetric design allows each mode to have its crosstalk characteristics optimized independently, enabling the system to reduce crosstalk appropriately for each mode while maintaining ease of operation.
4Adaptability or versatility
If multiple grating units with different orientations are used, then adaptability to different modes is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates multiple gratings with pre-determined orientations during the manufacturing process. The first grating is manufactured with a first orientation and the second grating with a second orientation, both prepared in advance. This preliminary action allows the system to switch between modes by simply activating the appropriate pre-configured grating, avoiding the need for complex real-time orientation adjustments and reducing manufacturing precision requirements during operation.
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
Enables compatible switching between glasses type and naked-eye type 3D displaying modes on the same apparatus, reducing crosstalk and improving depth perception by controlling the grating and polarizing filter functionality.
Implementation Method 1
a liquid crystal layer between the first substrate and the second substrate
Implementation Method 2
a polarizing filter functional structure on the grating functional structure, the functional states of the polarizing filter functional structure may be controlled to switch between effective and ineffective
Implementation Method 3
the original orientation of the liquid crystal molecules is parallel to the third substrate, and after applying electric field to the polarizing filter functional structure, the orientation of the liquid crystal molecules is vertical to the third substrate
Data Source
AI summary
A 3D display apparatus and manufacturing method thereof are provided, and the 3D display apparatus comprises: a liquid crystal display panel; and a first polarizing filter and a second polarizing filter respectively attached to both sides of the liquid crystal display panel; a grating functional structure on the second polarizing filter, wherein a stripe direction of the grating functional structure may be controlled to form a different predetermined angle with a horizontal direction; a polarizing filter functional structure on the grating functional structure, wherein the functional states of the polarizing filter functional structure may be controlled to switch between effective and ineffective. The 3D display apparatus can achieve a compatible switching between a glasses type 3D displaying mode and a naked-eye 3D displaying mode on the same 3D display apparatus.