Prism-Surface Optical Structure for Durable Stereoscopic Image Printing
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Solution Overview
Problem
Existing 2D image printing on mobile phone cases lacks distinctive visual effects and is prone to scratching, peeling, and fading, while 3D image prints using accented films produce unsatisfactory and dizzying effects.
Innovation Solution
An optical structure with concave and convex prism surfaces is formed by injection molding, with an image layer printed only on the convex peaks, utilizing light reflection and refraction to create a stereoscopic effect, and can be produced efficiently through injection molding and jet printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an image layer is directly printed on the outer surface of the mobile phone case, then the visual effect is simple 2D display, but the image layer is prone to scratching, peeling, and fading
Solution Approach 1:
The patent transitions from flat 2D image printing to a three-dimensional prism surface structure. The prism surface includes multiple V-shaped grooves creating convex and concave regions, transforming the imaging plane into a volumetric optical structure that enhances durability while maintaining visual functionality
Solution Approach 2:
The image layer is segmented into two distinct regions: a convex peak region that contacts the prism surface and provides durability, and a concave valley region that remains elevated and displays the image. This segmentation allows each region to fulfill its specific function independently
2Reliability
If accented film is used to produce 3D effect, then stereoscopic visual effect is achieved, but the effect is rough and produces dazzling, unsoft or dizzying sensations
Solution Approach 1:
The patent modifies the optical parameters by creating specific geometric configurations of V-shaped grooves with controlled depths (20-80μm) and angles (90°-140°). These parameter changes enable natural light reflection and refraction that produces soft, comfortable stereoscopic effects without the dazzling sensations caused by accented films
Solution Approach 2:
The patent replaces the mechanical accented film layer with an optically engineered prism surface structure. Instead of adding a separate film component, the stereoscopic effect is achieved through the geometric configuration of the prism surface itself, simplifying the manufacturing process while improving visual comfort
3Adaptability or versatility
If conventional 2D image printing is used on mobile phone cases, then manufacturing is simple, but the visual effect lacks distinction and variety
Solution Approach 1:
The patent merges the optical structure formation and image layer application into a single integrated process. The prism surface is formed by injection molding, and the image layer is applied in one step using jet printing technology, combining multiple functions into a unified manufacturing workflow that maintains 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
The optical structure enhances visual depth and color perception, providing a durable and cost-effective stereoscopic effect without the drawbacks of conventional methods.
Implementation Method 1
through the reflection and refraction of the incident light
Implementation Method 2
through the reflection and refraction of the incident light
Data Source
AI summary
The present invention is an optical structure with a stereoscopic effect. The prism surfaces are comprised of continuous concave and convex surfaces in the longitudinal, while transverse directions are formed on the surface of the optical substrate (molding methods include injection molding, roll molding, etc.). A default image layer is jet printed on the prism surface of the optical structure using a jet printer, so as to form an optical structure that makes the image layer present a stereoscopic effect when it is viewed from the reverse side. Since the depth range of the convex and concave peaks and valleys on the prism surface is 20˜80μ, the pigment of the printed image layer only covers the convex peaks and cannot permeate to the concave valleys, making the valleys transparent without pigment; when the light enters the reverse side of the optical structure, under the reflection and refraction effects at multiple angles, the image layer presents three-dimensional visual changes.