LCOS Display Light Absorbing Material Between Pixels
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Solution Overview
Problem
Prior art LCOS image displays suffer from stray light interference due to light impinging on irregular areas between pixel mirrors, leading to reduced image quality, and existing solutions like opaque covers or layers require precise application and are costly and time-consuming.
Innovation Solution
A light absorbing material is deposited between and around pixel mirrors in the LCOS display device to absorb stray light, improving image quality and simplifying the manufacturing process by using high precision wafer level processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If opaque covers or layers are used to prevent stray light, then light scattering is reduced, but manufacturing precision requirements increase and costs increase
Solution Approach 1:
The patent applies a light-absorbing material specifically in the irregular areas between pixel mirrors where stray light originates, rather than using a complete opaque cover. This localized treatment absorbs stray light at its source while leaving the pixel mirrors and functional areas unaffected, thereby reducing stray light interference without requiring precise application over the entire display surface.
Solution Approach 2:
The patent extracts and treats only the problematic irregular areas between pixel mirrors with light-absorbing material, separating the stray light problem from the functional pixel areas. This extraction approach allows targeted mitigation of stray light without imposing manufacturing precision requirements on the entire display structure.
2Object-affected harmful factors
If opaque covers or layers are used to prevent stray light, then light scattering is reduced, but manufacturing complexity and time increase
Solution Approach 1:
By applying light-absorbing material only to the irregular areas between pixel mirrors rather than using a complete opaque cover, the patent simplifies the manufacturing process. The localized application reduces the complexity of alignment and assembly operations while still effectively addressing stray light interference.
Solution Approach 2:
The patent uses a simple light-absorbing material layer that can be applied through straightforward deposition processes, replacing complex opaque cover structures. This approach reduces manufacturing complexity and allows for easier integration into the display fabrication process.
3Measurement precision
If light absorbing material is deposited between pixel mirrors, then image quality improves, but manufacturing process adds steps
Solution Approach 1:
The patent combines the light-absorbing material deposition with existing manufacturing steps in the display fabrication process. By integrating this step into the overall manufacturing flow rather than adding it as a separate post-processing operation, the impact on manufacturing cycle time is minimized while still achieving improved image quality through reduced stray light.
Solution Approach 2:
The light-absorbing material is deposited during the manufacturing process before final assembly, allowing subsequent layers and components to be built upon this foundation. This preliminary action enables the stray light mitigation to be incorporated into the base structure, streamlining subsequent manufacturing steps.
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 light absorbing material effectively reduces light scattering, enhancing display performance, image quality, and reducing manufacturing complexity and costs.
Implementation Method 1
a light absorbing material deposited between and/or around (framing) pixel mirrors of the device. The invention provides a reduction in light scattering within the display device
Data Source
AI summary
An example liquid crystal display device includes a circuit substrate, an array of conductive mirrors formed on the substrate, a light absorbing material disposed between the conductive mirrors, a transparent plate disposed over the array of conductive mirrors, and liquid crystal material disposed between the conductive mirrors and the transparent plate. The light absorbing material can also be disposed around the peripheral region of the array of the conductive mirrors. In an example display, the light absorbing material is black and/or has a light absorbing efficiency of at least fifty percent.