Transparent Micro-LED Pixel Circuit With One Transistor for Larger Aperture
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Solution Overview
Problem
Existing transparent display panels face limitations in increasing the area size of the transmissive area due to the need for multiple transistors to drive red, green, and blue micro-LED elements, which restricts transparency and aesthetic functionality.
Innovation Solution
A pixel circuit design that utilizes one driving transistor to control red, green, and blue micro-LED elements, incorporating a storage capacitor and additional transistors to manage data voltage, allowing for increased transmissive area size and improved transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If one driving transistor drives one light-emitting element, then the area size of the transmissive area can be increased, but the transparency and aesthetic functionality are limited
Solution Approach 1:
The patent applies multi-functionality by enabling a single driving transistor to control multiple light-emitting elements (red, green, and blue micro-LEDs) through time-division multiplexing. This allows one transistor to perform multiple functions that would traditionally require separate transistors for each color, thereby increasing the transmissive area while maintaining display functionality and aesthetic appearance
2Productivity
If multiple transistors are used to drive red, green, and blue micro-LED elements, then the light-emitting efficiency is improved, but the area size of the transmissive area is reduced
Solution Approach 1:
The patent merges the control functions for multiple color micro-LEDs into a single driving transistor by implementing time-division multiplexing. Instead of having separate transistors for red, green, and blue LEDs, the system combines them into one transistor that sequentially drives each color element, thereby reducing the total transistor count and increasing the transmissive area while maintaining efficient light emission
3Area of stationary object
If the area size of the transmissive area is increased, then the transparency is improved, but the number of required transistors increases
Solution Approach 1:
The patent applies multi-functionality by enabling a single driving transistor to control multiple light-emitting elements (red, green, and blue micro-LEDs) through time-division multiplexing. This allows one transistor to perform multiple functions that would traditionally require separate transistors for each color, thereby increasing the transmissive area while maintaining display functionality and aesthetic appearance
Data Source
AI summary
Disclosed is a transparent micro-LED unit pixel circuit capable of driving red, green, and blue micro-LED elements with one driving transistor to increase an area size of a transmissive area, and a transparent micro-LED display device including the same. The transparent micro-LED unit pixel circuit includes first to third micro-LEDs emitting light based on a driving current; a driving transistor configured to control the driving current, wherein the driving transistor is disposed between and connected to an anode electrode of each of the first micro-LED, the second micro-LED, and the third micro-LED and a high-potential power line; a storage capacitor disposed between and connected to a gate electrode and a source electrode of the driving transistor; and a first transistor configured to apply a data voltage to the gate electrode of the driving transistor.