Retroreflective Display Light Profile Shaping for Brightness Control
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Solution Overview
Problem
Current display systems, including flat-panel and projector-based displays, face limitations in achieving large screen sizes at low cost due to high power consumption, decreased brightness, and the inability to implement multi-viewer capabilities effectively, while retro-reflective display systems lack optimization for display applications.
Innovation Solution
A retro-reflective display screen configured with a light profile shaping medium between the retro-reflective display medium and the light source to shape the intensity distribution of reflected light, allowing for broader or split intensity distributions, and a light bending medium to enable high viewing angles, combined with a projector and micro-processor for controlled light direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If retro-reflective sheeting is used for display purposes, then display size can be increased, but the light intensity distribution is limited to the intrinsic shape determined by the retro-reflective elements
Solution Approach 1:
A light profile shaping medium is introduced as an intermediary component between the retro-reflective display medium and the light source. This medium modifies the intrinsic light profile from the retro-reflective elements to achieve desired intensity distributions, enabling both large display sizes and flexible light control simultaneously
Solution Approach 2:
The display system is divided into separate functional components: the retro-reflective display medium for size and brightness, and the light profile shaping medium for intensity distribution control. This segmentation allows each component to optimize its specific function while working together
2Illumination intensity
If conventional retro-reflective material is used, then high brightness levels are achieved, but multi-viewer capabilities are not possible
Solution Approach 1:
The light profile shaping medium acts as a mediator that takes the high-intensity light from the retro-reflective material and redistributes it to create multiple viewing zones with customized content, enabling both high brightness and multi-viewer functionality
Solution Approach 2:
The system transitions from a single-viewing-angle retro-reflective display to a multi-viewing-angle display by introducing the light profile shaping medium that creates multiple light paths and viewing zones in different spatial dimensions
3Area of stationary object
If flat-panel displays are used for large screen sizes, then display area increases, but power consumption increases non-linearly
Solution Approach 1:
The retro-reflective display medium reflects ambient or projected light back to viewers without requiring additional power consumption for light generation at the display itself, enabling large screen sizes with minimal energy use
Solution Approach 2:
A projector serves as an external light source intermediary, providing the necessary illumination for the retro-reflective display medium to function, separating the light generation function from the light display function
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
Enables larger display sizes with high brightness and multi-viewer capabilities, improving the viewing experience by maintaining image intensity and clarity across various angles, and allowing multiple viewers to see customized content simultaneously.
Implementation Method 1
a retro-reflective display medium configured to display an image by retro-reflectively reflecting incident light from a light source
Implementation Method 2
the light profile shaping medium is configured to broaden or diffuse the intrinsic intensity distribution along at least one direction parallel to a major surface of the light profile shaping medium
Implementation Method 3
a light bending medium interposed between the retro-reflective display medium and the light source, wherein the light bending medium is configured to substantially bend light passing therethrough
Data Source
AI summary
The disclosed technology generally relates to displays, and more particularly to display screens configured to display images having a shaped light profile. A display screen comprises a retroreflective display medium configured to display an image by retroreflectively reflecting incident light from a light source. The display screen additionally comprises a light profile shaping medium interposed between the retroreflective display medium and the light source. The light profile shaping medium is configured to shape an intensity distribution of light reflected from the retroreflective display medium prior to displaying the image to a viewer.