Bowl-Shaped Reflectors for Brighter Micro Light-Emitting Chips
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Solution Overview
Problem
Current micro light-emitting chips have low light-emitting brightness due to inefficient light reflection and emission angles, which limits their application in display fields.
Innovation Solution
A light-emitting chip design featuring a bowl-shaped reflector surface on the back of each light-emitting pixel, which reflects light emitted by the pixel and adjusts its emission direction and angle, improving the front light exit rate and overall brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional flat reflector is used, then the structure is simple, but the light-emitting brightness is low due to inefficient light reflection
Solution Approach 1:
The reflector is designed with a bowl-shaped curved surface instead of a flat surface. This curvature enables the reflector to effectively reflect and redirect light emitted by the light-emitting pixel, improving light extraction efficiency and increasing the front light exit rate, thereby enhancing overall light-emitting brightness without significantly complicating the device structure
Solution Approach 2:
The bowl-shaped reflector is positioned specifically beneath each light-emitting pixel, creating a localized optical enhancement structure. This local optimization allows the reflector to target and redirect light in specific directions (toward the front surface), improving brightness where it is most needed without requiring complex structures throughout the entire device
2Illumination intensity
If light is emitted in all directions, then the light distribution is uniform, but the front light exit rate is low
Solution Approach 1:
The bowl-shaped curved surface of the reflector is specifically designed to intercept light emitted in various directions and redirect it toward the front surface. The curvature geometry naturally focuses and redirects light rays, converting omnidirectional emission into preferential forward emission, thereby increasing the front light exit rate without requiring active control mechanisms
Solution Approach 2:
The reflector acts as an intermediary optical element between the light-emitting pixel and the front surface. It mediates the light emission process by intercepting light in the backward and lateral directions and redirecting it forward, effectively controlling the light emission direction without modifying the light-emitting pixel itself
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 bowl-shaped reflector configuration enhances the light-emitting brightness of the micro light-emitting chip by effectively reflecting and directing light emissions, thereby improving the chip's performance in display applications.
Implementation Method 1
The reflector is configured to reflect light emitted by a corresponding light-emitting pixel and adjust an emission direction and/or an emission angle of the light
Data Source
AI summary
Disclosed are a light-emitting chip, a manufacturing method thereof and an electronic device. The light-emitting chip includes a first substrate; and at least one reflector and a light-emitting pixel layer sequentially located on the first substrate. The light-emitting pixel layer includes at least one light-emitting pixel. The reflector is arranged corresponding to the light-emitting pixel. A first surface, close to the light-emitting pixel, of the reflector is a bowl-shaped surface. The bowl-shaped surface is concave in a direction close to the first substrate. The reflector is configured to reflect light emitted by a corresponding light-emitting pixel and adjust an emission direction and/or an emission angle of the light, so that the light exit rate of the light-emitting chip can be improved, and the light-emitting brightness of the light-emitting chip and electronic device can be further improved.