Color Filter and Integrator Rod Layout for Display Light Recycling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing digital display systems face inefficiencies in utilizing reflected light, leading to reduced brightness and image quality due to the wastage of otherwise unused reflected light.
Innovation Solution
A system is developed that recycles reflected light by using an integrator rod and a color filter to redirect and reuse reflected light onto a spatial light modulator, such as a DMD or LCoS, enhancing light efficiency and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If reflected light is not recycled, then the system structure remains simple, but the brightness and light efficiency of the display system deteriorates
Solution Approach 1:
An integrator rod is introduced as an intermediary optical component between the color filter and the spatial light modulator. The integrator rod collects reflected light from the color filter and redirects it back onto the spatial light modulator, thereby recycling light that would otherwise be lost and improving overall system brightness without requiring complex multi-component assemblies
Solution Approach 2:
The system recovers reflected light that would normally be discarded or lost. By positioning the integrator rod to capture light reflected from the color filter and redirecting it onto the spatial light modulator, the system recycles this previously wasted light energy, improving light efficiency and brightness
2Loss of energy
If reflected light is recycled using an integrator rod, then light efficiency and brightness improve, but the device complexity increases
Solution Approach 1:
The integrator rod serves as a simple intermediary optical element that efficiently recycles reflected light. Rather than using complex optical systems with multiple mirrors and lenses, a single integrator rod is sufficient to redirect light from the color filter back onto the spatial light modulator, minimizing the addition of optical components while maximizing light recovery
Solution Approach 2:
The integrator rod is designed to work passively within the existing optical path, utilizing the natural reflection from the color filter to redirect light back onto the spatial light modulator. The system essentially uses its own structural elements (the color filter's reflective properties) to achieve light recycling without requiring external active components
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 recycling of reflected light improves the efficiency of the digital display system and enhances the brightness of the image on the SLM by improving the brightness of the image on the SLM.
Implementation Method 1
a color filter including a first segment configured to transmit first light having a first color and to reflect second light having a second color and a second segment configured to transmit the second light having the second color and to reflect the first light having the first color
Implementation Method 2
an integrator rod optically coupled to the color filter... configured to transmit the first light towards the color filter, transmit the second light towards the color filter, direct the first reflected light towards the color filter, and direct the second reflected light towards the color filter
Data Source
AI summary
A system includes a color filter including a first segment configured to transmit first light having a first color and to reflect second light having a second color and a second segment configured to transmit the second light having the second color and to reflect the first light having the first color. The system also includes an integrator rod optically coupled to the color filter, a reflective surface having an aperture on an end of the integrator rod.