Electro-Optical Device Lens Layer Curvature Optimization
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Solution Overview
Problem
Existing electro-optical devices face challenges in reducing the thickness of films on substrates with lenses and improving positioning accuracy between lenses, leading to low productivity and inefficient light guidance in projection-type display apparatuses.
Innovation Solution
The electro-optical device features a pair of substrates with a specific configuration of lens layers and a light shielding member, where each lens layer has a distinct refractive index and surface curvature, allowing for efficient light convergence and elimination of the need for a thick optical path length adjustment layer, thereby enhancing productivity and image brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light transmission layer is provided as a light path length adjustment layer between two lenses, then the optical path length can be optimized, but the thickness of the film increases and the formation time increases, reducing productivity
Solution Approach 1:
The patent removes the separate light path length adjustment layer from the structure. Instead of adding a dedicated layer for optical path adjustment, the invention integrates the optical path control function into the existing lens layer structure, thereby eliminating the need for a thick adjustment layer and reducing overall film thickness and formation time.
Solution Approach 2:
The lens layer is designed to serve multiple functions simultaneously: it provides both the optical focusing function and the optical path length adjustment function. By making the lens layer multi-functional, the patent eliminates the need for a separate light path length adjustment layer, thus reducing the number of layers and improving productivity.
2Ease of operation
If two lenses are provided in an overlapping manner to guide light, then light can be effectively directed to the light transmission area, but high positioning accuracy between the lenses is required, increasing manufacturing difficulty
Solution Approach 1:
The patent combines two separate lenses into a single integrated lens structure with specific surface curvature designs. By merging the two lenses into one unified component, the positioning accuracy requirement between separate lenses is eliminated, while the light guidance function is maintained through the integrated curved surface design.
Solution Approach 2:
The invention uses specific curved surface designs (concave and convex surfaces with defined radii of curvature) to achieve effective light guidance. The curved surfaces are designed with specific radius ratios (0.5 ≤ R2/R1 ≤ 2.0) to optimize light convergence and direction without requiring high positioning accuracy between multiple lenses.
3Manufacturing precision
If refraction at the boundary surface between lens layer and optical path length adjustment layer is utilized, then optical path length can be adjusted, but the light beam deflection is limited and requires increased layer thickness, reducing productivity
Solution Approach 1:
The patent employs curved surface designs with specific radius of curvature ratios to achieve effective light beam deflection. By optimizing the curvature of the lens surfaces (with radius ratio 0.5 ≤ R2/R1 ≤ 2.0), the invention achieves strong light deflection capability without requiring thick adjustment layers, thus maintaining high productivity.
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 enables efficient light guidance to the light transmission area, improving image brightness and reducing the time required for film formation, thus enhancing productivity and positioning accuracy.
Implementation Method 1
refraction at a boundary surface between the lens layer and the optical path length adjustment layer is utilized
Data Source
AI summary
A second substrate of an electro-optical device is provided with a first curved surface. A first lens layer covers the first curved surface, and includes a second curved surface at a surface on an electro-optical layer side. A second lens layer covers the second curved surface, and includes a flat surface on the electro-optical layer side. A third lens layer includes a third curved surface on the electro-optical layer side. A fourth lens layer covers the third curved surface, and includes a fourth curved surface on the electro-optical layer side. A fifth lens layer covers the fourth curved surface. Between the second lens layer and the third lens layer, a light shielding member including a partition and a light shielding member for alignment is provided.