Microlens Pixel Partition Structure for Optical Crosstalk Suppression
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Solution Overview
Problem
Existing image display elements with microlenses suffer from optical crosstalk, where light leaks from one pixel to an adjacent pixel, reducing contrast and color purity.
Innovation Solution
The image display element incorporates pixels with micro light emitting elements, a driving circuit substrate, a microlens for each pixel, and an inter-pixel partition or a transparent portion between the micro light emitting element and the microlens to prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a microlens is provided on a micro light emitting element to improve light extraction efficiency and distribute emission light in the forward direction, then light extraction efficiency is improved, but optical crosstalk occurs where light leaks from one pixel to an adjacent pixel
Solution Approach 1:
The patent divides the space between adjacent pixels into separate regions by introducing partition walls that extend from the substrate surface to the microlens surface. This segmentation physically separates the optical paths of adjacent pixels, preventing light from one pixel from entering the microlens of an adjacent pixel, thereby eliminating optical crosstalk while preserving the light concentration function of each microlens
Solution Approach 2:
The patent introduces partition walls as intermediary structures that act as barriers between adjacent pixels. These partition walls are positioned between the light emitting elements and microlenses of adjacent pixels, serving as mediators that block stray light from crossing pixel boundaries while allowing the primary light path of each pixel to remain uninterrupted
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 configuration effectively suppresses optical crosstalk, allowing for strong forward-directed light emission, high contrast, high color purity, and reduced power consumption.
Implementation Method 1
it is proposed to provide a microlens on a micro light emitting element in order to improve the light extraction efficiency and distribute emission light strongly in the forward direction
Implementation Method 2
an inter-pixel partition disposed between the pixels and extending from a light emitting surface of the micro light emitting element to the microlens
Implementation Method 3
an array of minute light emitting diodes (LEDs) configured to emit ultraviolet light
Implementation Method 4
a micro light emitting element, a driving circuit substrate including a driving circuit configured to supply a current to the micro light emitting element and cause the micro light emitting element to emit light
Implementation Method 5
a wavelength conversion layer that converts ultraviolet light into red, green, and blue visible light
Data Source
AI summary
An image display element includes pixels, a driving circuit substrate, a microlens, and an inter-pixel partition. The pixels are disposed in an array, each including a micro light emitting element. The driving circuit substrate includes a driving circuit configured to supply a current to the micro light emitting element and cause the micro light emitting element to emit light. The microlens is disposed for each of the pixels. The inter-pixel partition is disposed between the pixels and extends from a light emitting surface of the micro light emitting element to the microlens.