Dual-Sided Thin Film Display Structure With Orthogonal Polarizers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LED thin film display devices require multiple stacked screens to show dual-sided images, leading to unavoidable interferences between front and back images, resulting in unclear, blurred, and distorted images with poor observation quality.
Innovation Solution
A novel thin film display structure utilizing two different polarizing elements, a reflective polarizing element on the front surface and a linear polarizing element on the back surface, with orthogonal transmission axes, to form distinct images on each side while reducing stray light and improving resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple stacked screens are used to show dual-sided images, then dual-sided imaging capability is achieved, but image interference and blurring occur
Solution Approach 1:
The patent divides the light source into two distinct polarization components using a polarizing beam splitter. One component (p-polarized light) passes through to form the front image, while the other component (s-polarized light) is reflected to form the back image. This segmentation of the light path eliminates interference between dual-sided images while maintaining clear image quality on both surfaces.
2Adaptability or versatility
If multiple stacked screens are used to show dual-sided images, then dual-sided imaging capability is achieved, but image distortion occurs
Solution Approach 1:
The patent divides the light source into two distinct polarization components using a polarizing beam splitter. One component (p-polarized light) passes through to form the front image, while the other component (s-polarized light) is reflected to form the back image. This segmentation of the light path eliminates interference between dual-sided images while maintaining clear image quality on both surfaces.
3Reliability
If orthogonal polarizing elements are used to form dual-sided images, then image interference is suppressed, but device complexity increases
Solution Approach 1:
The patent introduces a polarizing beam splitter as an intermediary optical element that automatically separates the light from the light source into two orthogonal polarization components. This intermediary device handles the complex task of polarization separation and directional routing, simplifying the overall system design while ensuring clear, interference-free dual-sided imaging.
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 effectively suppresses interferences between dual-sided images, maintaining clear and high-resolution images on both surfaces, enhancing user observation quality and expanding applications to touch sensing devices.
Implementation Method 1
a reflective polarizing element and a linear polarizing element, with their transmission axes orthogonal to each other, the reflective polarizing element being disposed on a front surface of the light source and the linear polarizing element being disposed behind a back surface of the light source
Implementation Method 2
a reflective polarizing element... such that a light beam emitted from the light source passes through the reflective polarizing element to form a front image and a back image
Data Source
AI summary
A dual-sided imaging thin film display structure is provided, comprising a light source, a reflective polarizing element, a basing layer and a linear polarizing element. The reflective polarizing element is disposed on a front surface of the light source, the basing layer is disposed on a back surface of the light source, and the linear polarizing element is further disposed behind the basing layer. A transmission axis of the reflective polarizing element and that of the linear polarizing element are orthogonal, such that a light beam emitted from the light source passes through the reflective polarizing element to form a front image, be reflected by the reflective polarizing element, and passes through the linear polarizing element to form a back image. By employing the present invention, it achieves to provide dual-sided images and interferences between the images are suppressed to obtain superior imaging quality and resolution.