Autostereoscopic Display Alignment Marker Using Extraction Principle
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Solution Overview
Problem
Existing methods for positional alignment between optical image separation elements and display panels in autostereoscopic three-dimensional display devices are costly, time-consuming, and inefficient, requiring specialized apparatus and accurate marker formation on both elements, which increases fabrication costs and reduces productivity.
Innovation Solution
An alignment marker system is introduced, featuring differently shaped marker elements arranged along the optical image separation direction on the display panel, allowing for easy visual recognition of alignment and positional deviations using an existing optical image separation element and standard bonding apparatus, without the need for markers on the optical image separation element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If markers are formed on both the display panel and the lens, then positional alignment can be achieved, but the fabrication cost increases and the process becomes more complex
Solution Approach 1:
The invention extracts the alignment marker function from the lens and places it only on the display panel. The marker formation process is taken out from the lens fabrication process and integrated into the display panel manufacturing process, eliminating the need for separate marker formation on the lens while maintaining alignment accuracy.
Solution Approach 2:
The display panel serves multiple functions: it displays images and simultaneously provides the alignment marker. The marker formation is integrated into the display panel manufacturing process, making the panel structure multi-functional rather than adding separate alignment components.
2Measurement precision
If specialized alignment apparatus is used, then alignment accuracy is improved, but the equipment cost and operation complexity increase
Solution Approach 1:
The alignment system is self-service in that the marker on the display panel automatically provides alignment information when viewed through the lens. The existing optical elements serve the dual purpose of image display and alignment indication, eliminating the need for specialized alignment equipment.
Solution Approach 2:
The invention uses visual recognition of marker patterns (different shapes, sizes, or arrangements) that appear differently when viewed through the lens at different alignment states. This visual feedback mechanism replaces complex electronic alignment systems with simple optical-visual detection.
3Manufacturing precision
If accurate marker formation on the lens is performed, then alignment precision is improved, but the manufacturing time and cost increase
Solution Approach 1:
The marker formation process is merged with the display panel manufacturing process. The same manufacturing steps used to create the display panel structure are also used to form the alignment marker, eliminating separate processing steps and reducing overall manufacturing time.
Solution Approach 2:
The alignment marker is formed preliminarily during the display panel manufacturing process before the lens assembly. This preliminary action ensures the marker is already in place when the lens is mounted, eliminating the need for post-assembly alignment operations.
4Measurement precision
If markers are formed on the optical image separation element, then alignment can be achieved, but the ease of manufacture decreases
Solution Approach 1:
Instead of forming markers on the lens (optical image separation element), the invention inverts the approach by forming the marker on the display panel. This reversal simplifies manufacturing because the display panel is already being manufactured with precise patterns, while the lens can be a simple optical element without additional processing.
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 solution enables rapid and accurate positional alignment, reduces fabrication costs, and improves productivity by allowing the use of existing optical image separation elements and standard alignment tools, while providing clear visual feedback on alignment status and deviation.
Implementation Method 1
an optical element that separates images by dividing incident light for different viewpoints
Implementation Method 2
allowing for easy visual recognition of alignment and positional deviations using an existing optical image separation element
Data Source
AI summary
An alignment marker includes first marker element pieces for a first viewpoint and second marker element pieces for a second viewpoint different in plan shape. The first and second marker element pieces are respectively formed by dividing marker elements in such a way as to be equal in width to a predetermined marker element pitch. These pieces are arranged at the marker element pitch along an optical image separation direction of the optical image separation element. A predetermined number of the adjoining first and second pieces constitute one repetition cycle. A width of the repetition cycle is in accordance with an arrangement pitch of constituent elements of the optical image separation element. An existing optical image separation element can be used without the formation of the markers thereon and the alignment operation can be performed with a usual aligning and bonding apparatus.