Transparent Display Panel Micro-LED Transmittance Optimization
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Solution Overview
Problem
Current transparent displays face challenges in achieving high transmittance and low haze, which affects the clarity and brightness of scenes seen through them, due to the presence of reflective metal lines and limited light transmission areas in sub-pixels.
Innovation Solution
A transparent display panel design featuring micro light-emitting diodes (Micro-LEDs) with a control circuit and a large light transmission portion, including transparent insulating materials or openings, to maximize light transmission while minimizing metal wire overlap and scattering, thereby enhancing transmittance and reducing haze.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reflective metal lines are used in sub-pixels for electrical connection, then electrical conductivity is improved, but transmittance deteriorates and haze increases
Solution Approach 1:
The patent extracts the harmful reflective metal lines from the light transmission path by replacing them with transparent conductive materials. The metal wires are completely removed from the sub-pixel structure and relocated to the frame area, eliminating their negative impact on transmittance and haze while maintaining electrical connectivity through transparent alternatives.
Solution Approach 2:
The patent changes the material parameter of the conductive elements from opaque metal to transparent conductive materials. This parameter change allows the electrical connection function to be maintained while simultaneously improving optical properties (transmittance and haze reduction) by using materials that are both conductive and transparent to visible light.
2Reliability
If metal wires are used for electrical connection in sub-pixels, then electrical conductivity is improved, but haze increases due to light scattering
Solution Approach 1:
The patent extracts the harmful metal wires from the sub-pixel light transmission path and relocates them to the frame area. This extraction eliminates the light scattering effect caused by metal wires, thereby reducing haze while maintaining electrical connectivity through transparent conductive materials positioned in non-interference areas.
Solution Approach 2:
The patent introduces transparent conductive materials as intermediary elements to replace metal wires. These intermediaries perform the electrical connection function while being optically transparent, thus mediating between the need for electrical conductivity and the requirement to minimize light scattering and haze.
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 design achieves higher transmittance and clearer scene visibility by optimizing the area ratio of light transmission to light-emitting units, resulting in higher brightness and longer service life with improved contrast and clarity for both displayed images and ambient scenes.
Implementation Method 1
The light-emitting unit includes at least one micro light-emitting diode (Micro-LED) and a control circuit connected to the at least one Micro-LED. The control circuit is configured to drive the at least one Micro-LED to emit light.
Implementation Method 2
The light transmission portion includes at least one of a transparent insulating portion or an opening.
Data Source
AI summary
A transparent display panel includes a base and a plurality of sub-pixels disposed on the base. Each sub-pixel includes a light-emitting unit, and a light transmission portion disposed on at least one side of the light-emitting unit. The light-emitting unit includes at least one Micro-LED and a control circuit connected to the Micro-LED. The control circuit is configured to drive the at least one Micro-LED to emit light. The light transmission portion includes at least one of a transparent insulating portion or an opening.