Isolation Grid for Small Pitch Direct View Display
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Solution Overview
Problem
Existing LED-based direct view display devices face issues with optical interference between adjacent pixels, leading to reduced optical resolution due to light emission from larger areas than intended by pixel design.
Innovation Solution
Incorporating an isolation grid made of light-absorbing material between pixels on a printed circuit board, which can be manufactured using UV curable ink or injection molding, to reduce optical interference and enhance resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If LEDs are arranged in pixels without isolation structures, then device complexity is reduced and manufacturing is easier, but optical interference occurs between adjacent pixels reducing optical resolution
Solution Approach 1:
The isolation grid divides the display surface into separate pixel regions, creating physical and optical boundaries between adjacent pixels. This segmentation prevents light from one pixel from interfering with neighboring pixels, thereby improving optical resolution without requiring complex per-pixel isolation structures
Solution Approach 2:
The isolation grid acts as an intermediary element positioned between adjacent pixels. Made of light-absorbing material, it mediates the optical interaction between pixels by absorbing stray light and preventing cross-talk, thus enhancing optical resolution while maintaining a relatively simple overall device structure
2Manufacturing precision
If isolation grid is added between pixels, then optical interference is reduced and optical resolution is enhanced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The isolation grid is integrated with the pixel array structure, combining the isolation function with the overall display architecture. This merging approach allows the isolation grid to be manufactured as part of the pixel assembly process, reducing the number of separate manufacturing steps and maintaining manufacturing ease while achieving improved optical resolution
3Manufacturing precision
If isolation grid made of light absorbing material is used, then optical interference is reduced, but contamination risk increases
Solution Approach 1:
The isolation grid is implemented as a thin film or mesh structure that can conform to the pixel array while maintaining optical isolation. This thin film approach minimizes the physical volume of the isolation material, reducing potential contamination sources while preserving the light-absorbing optical isolation 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
The isolation grid significantly reduces optical interference, enhancing the optical resolution and preventing contamination, thereby improving the display's clarity and durability.
Implementation Method 1
an isolation grid comprising a light absorbing material located between the pixels in the array of pixels
Data Source
AI summary
A direct view display device includes a printed circuit board, an array of pixels located on a first side of the printed circuit board, each pixel including a plurality of light emitting diodes, and an isolation grid comprising a light absorbing material located between the pixels in the array of pixels.