Adaptive LED Sidewalls for Pixel Cross-Talk Isolation
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Solution Overview
Problem
In precision control lighting applications, such as micro LED arrays, achieving accurate optical isolation between small pixels is challenging due to the compact size and close spacing, leading to issues like cross-talk and uneven light distribution.
Innovation Solution
The use of dynamic optical isolation materials, such as thermochromic, thermotropic, electrochromic, and photochromic materials, attached to the sidewalls of pixels, which change their optical state in response to triggers like temperature or light, allowing for controlled light interaction and reduced cross-talk between pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If small LED pixels are placed close together to increase pixel density, then productivity and device compactness are improved, but optical isolation between pixels deteriorates leading to cross-talk
Solution Approach 1:
The patent introduces sidewall structures as intermediary elements between adjacent LED pixels. These sidewalls act as optical barriers that block light propagation from one pixel to another, preventing cross-talk while allowing the pixels to remain in close proximity for high pixel density applications.
Solution Approach 2:
The patent segments the space between adjacent pixels by introducing sidewall structures that divide the optical path. This segmentation creates distinct optical zones for each pixel, preventing light from spilling into adjacent pixels while maintaining compact pixel spacing.
2Object-affected harmful factors
If material deposition is performed to create sidewall structures, then optical isolation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent performs material deposition to form sidewall structures during the manufacturing process before final device assembly. This preliminary action ensures that optical isolation structures are already in place, simplifying subsequent assembly steps and ensuring consistent optical performance.
Solution Approach 2:
The patent replaces complex mechanical alignment and positioning systems with material deposition processes that automatically form sidewall structures. This substitution simplifies manufacturing by using conformal deposition techniques that self-align to the pixel structures.
3Adaptability or versatility
If dynamic optical isolation materials are used on sidewalls, then light distribution control is improved, but device complexity increases
Solution Approach 1:
The patent employs dynamic optical isolation materials on sidewalls that can change their optical properties in response to external stimuli such as temperature, light intensity, or electrical signals. This allows the system to adaptively control light distribution between pixels based on operating conditions, enhancing versatility while maintaining a relatively simple structural implementation.
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
This solution enhances the efficiency and uniformity of light emission by minimizing cross-talk and improving contrast between pixels, enabling more precise control over light distribution and reducing unwanted light emission through sidewalls.
Implementation Method 1
The use of dynamic optical isolation materials, such as thermochromic, thermotropic, electrochromic, and photochromic materials
Implementation Method 2
The use of dynamic optical isolation materials, such as thermochromic, thermotropic, electrochromic, and photochromic materials
Implementation Method 3
The use of dynamic optical isolation materials, such as thermochromic, thermotropic, electrochromic, and photochromic materials
Implementation Method 4
a first dynamic optical isolation material between the first pixel sidewall and the second pixel sidewall and configured to change an optical state based on a state trigger such that a light behavior at the first pixel sidewall for a light emitted by one of the first pixel and the second pixel is determined by the optical state
Data Source
AI summary
A first LED with a first LED sidewall is disclosed. A second LED with a second LED sidewall facing the first LED sidewall is also disclosed. A first dynamic optical isolation material between the first LED sidewall and the second LED sidewall and configured to change an optical state based on a state trigger such that a light behavior at the first LED sidewall for a light emitted by one of the first LED and the second LED is determined by the optical state, is also disclosed.