Cover Lens Surface Geometry for Digital Writing
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Solution Overview
Problem
Digital writing surfaces with cover lenses experience unnatural feel due to differing physical characteristics, leading to frictional elements that scatter light and diminish optical properties like haze, sharpness, and contrast.
Innovation Solution
A cover lens with etched first and second surface geometries, where the first surface interacts with writing utensils and has a root mean square height of 0.3 to 0.7 microns, and the second surface refracts light to maintain optical clarity, preventing distortion of images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If frictional elements are introduced on the cover lens surface to generate natural physical characteristics for digital writing, then the writing feel is improved, but light scattering increases and optical properties (haze, sharpness, contrast) are diminished
Solution Approach 1:
The cover lens surface is segmented into two distinct surfaces: the first surface contains frictional elements (peaks and valleys) for natural writing feel, while the second surface is optimized for optical clarity. This segmentation allows each surface to perform its specific function without compromising the other.
Solution Approach 2:
Different regions of the cover lens have different properties: the first surface has rough frictional elements for tactile feedback, while the second surface has smooth geometry for light transmission. This local differentiation resolves the contradiction between writing feel and optical performance.
2Object-affected harmful factors
If a smooth cover lens surface is used to maintain optical clarity, then light transmission is improved, but the digital writing feel becomes unnatural
Solution Approach 1:
The cover lens is divided into two surfaces with different functions: the first surface provides frictional feedback for natural writing, while the second surface maintains smooth geometry for optimal light transmission and optical clarity.
Solution Approach 2:
The first surface is designed with rough frictional elements localized for tactile interaction, while the second surface maintains smooth properties localized for optical performance, allowing both requirements to be satisfied simultaneously.
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 digital writing feel while maintaining the optical performance by ensuring minimal light scattering and distortion, providing a natural interaction with writing utensils and preserving image quality.
Implementation Method 1
determining a plurality of angles of refraction at the first surface from light generated from the electronic display based on the first surface geometry
Implementation Method 2
determining a second surface geometry for a second surface of the cover lens based on the plurality of angles of refraction at the first surface
Data Source
AI summary
An embodiment of a method of manufacturing a cover lens for an electronic display includes etching a first surface geometry on a first surface of the cover lens. In the embodiment, the method includes determining a plurality of angles of refraction at the first surface from light generated from the electronic display based on the first surface geometry. In the embodiment, the method includes determining a second surface geometry for a second surface of the cover lens based on the plurality of angles of refraction at the first surface. In the embodiment, the method includes etching the second surface geometry on the second surface of the cover lens.