Patterned Diffractive Display Layer for Higher Axial Brightness
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Solution Overview
Problem
Existing display systems fail to effectively redirect off-axis light into the axial direction, leading to suboptimal brightness and intensity for viewers.
Innovation Solution
A light diffractive layer is patterned to include diffractive regions over non-emitting regions and not over emitting regions, redirecting off-axis light into the axial direction without significantly affecting emitted axial light, using suitably patterned light diffractive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light diffractive layer is placed over the entire display panel, then off-axis light is redirected into the axial direction, but the axial light intensity is reduced and brightness is diminished
Solution Approach 1:
The light diffractive layer is applied selectively only to the non-emitting regions of the display panel, leaving the emitting regions uncovered. This local application ensures that off-axis light from non-emitting areas is redirected into the axial direction to enhance brightness, while the axial light emitted from the emitting regions passes through without being diffracted, preserving its intensity and avoiding energy loss.
2Illumination intensity
If no light diffractive layer is used, then axial light intensity is maintained, but off-axis light is not redirected leading to suboptimal brightness
Solution Approach 1:
The diffractive layer is applied locally only to non-emitting regions rather than uniformly across the entire panel or not at all. This selective application optimizes brightness by redirecting off-axis light where needed while maintaining simplicity in manufacturing by avoiding complex full-panel coatings or additional optical components.
3Illumination intensity
If a light diffractive layer covers emitting regions, then off-axis light redirection occurs, but the overall light output and viewing quality are degraded
Solution Approach 1:
The diffractive layer is selectively applied only to non-emitting regions of the display panel, creating a simple binary pattern that is easy to manufacture. This local application approach enhances light output by redirecting off-axis light from non-emitting areas while completely avoiding any degradation of the light emitted from the emitting regions, as they remain uncovered and optically unmodified.
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
Significant improvement in axial intensity, with increased brightness by at least 10-50% compared to systems without a diffractive layer and/or with a diffractive layer covering the entire display panel.
Implementation Method 1
a light diffractive layer configured to be between the viewer and the display region... The light diffractive layer includes a light diffractive region configured to diffract light
Data Source
AI summary
A display system includes a display region configured to form an image thereacross for viewing by a viewer and including a light emitting region configured to emit light and a light non-emitting region not configured to emit light; and a light diffractive layer configured to be between the viewer and the display region and disposed substantially parallel to, and spaced apart along a thickness direction of the display system from, the display region. The light diffractive layer includes a light diffractive region configured to diffract light and a light non-diffractive region not configured to diffract light. The light diffractive and non-diffractive regions of the light diffractive layer are aligned, and substantially coextensive in length and width, with the respective light non-emitting and emitting regions of the display region.