Front-Lit LCOS Module With Multi-Color Illumination for High Resolution
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Solution Overview
Problem
Conventional LCOS panels face a resolution trade-off between color imaging and pixel resolution, as they require a color light source with insufficient illumination power.
Innovation Solution
A light-emitting module with a substrate, light-emitting elements of multiple colors, a window plate, and an encapsulant, combined with a front-lit LCOS module configuration that includes polarizers and a waveguide to enhance color illumination intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an LCOS panel uses color filters to divide pixels into red, green, and blue subpixels, then the LCOS panel can provide color images, but the resolution of the LCOS panel is reduced
Solution Approach 1:
The patent segments the illumination function from the display function by using a separate light-emitting module with multiple colored light sources (red, green, blue LEDs) positioned below the LCOS panel. This allows the LCOS panel to maintain full-resolution pixels without color filter segmentation, while the segmented colored lights provide color illumination from beneath, resolving the contradiction between color capability and resolution.
2Manufacturing precision
If an LCOS panel uses pixels not divided into subpixels with different colors, then the LCOS panel can have higher resolution, but the LCOS panel needs a color light source with insufficient illumination power
Solution Approach 1:
The patent merges multiple colored light sources (red LED, green LED, blue LED) into a single integrated light-emitting module positioned adjacent to the LCOS panel. This combination provides sufficient total illumination power across all colors simultaneously, eliminating the need for high-power individual color light sources and enabling high-resolution pixels without color division while maintaining adequate brightness.
3Device complexity
If a conventional LCOS module uses a single color light source, then the structure is simple, but the illumination power is insufficient to provide adequate color image intensity
Solution Approach 1:
The patent transitions from a single-color illumination approach to multi-color illumination by adding vertical stacking of different colored LED elements (red, green, blue) in the light-emitting module. This dimensional expansion in the light source structure provides comprehensive color coverage and sufficient total power without significantly increasing horizontal complexity, resolving the contradiction between structural simplicity and illumination power.
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 provides a color image beam with sufficient intensity by utilizing multiple colored light-emitting elements and a window plate to guide light, enabling a front-lit LCOS module to deliver high-resolution color images.
Implementation Method 1
a plurality of light-emitting elements disposed on the substrate and having a plurality of light colors
Implementation Method 2
a window plate disposed on light-emitting surfaces of the light emitting elements, wherein lights emitted by the light-emitting elements pass through the window plate to form an illumination beam
Implementation Method 3
The first polarizer is disposed on a path of the illumination beam and configured to polarize the illumination beam
Implementation Method 4
The LCOS panel is disposed below the second surface and configured to convert the illumination beam into a polarized image beam
Implementation Method 5
The second polarizer is disposed on the first surface and configured to allow the polarized image beam to pass through
Data Source
AI summary
A light-emitting module including a substrate, a plurality of light-emitting elements, a window plate, and an encapsulant is provided. The light-emitting elements are disposed on the substrate and have a plurality of light colors. The window plate is disposed on light-emitting surfaces of the light emitting elements. The encapsulant wraps the light-emitting elements and surrounds the window plate. A front-lit liquid-crystal-on-silicon module is also provided.