Hybrid Display Panel Power Alignment for OLED and Micro-LED Uniformity
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Solution Overview
Problem
Micro-LED display panels face challenges with low luminous efficiency of red Micro-LEDs and difficulties in mass transfer of three-color Micro-LEDs, while OLED display panels struggle with low light efficiency, short material life, and rapid blue light attenuation, limiting their mass production and development.
Innovation Solution
A display panel design that incorporates a matrix of light-emitting units, including red, green, and blue units of different technologies (OLED, QLED, and Micro-LED), with subpixel driving circuits and independent power supply alignments to provide specific common voltages to each type of light-emitting unit, allowing for separate driving and optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If Micro-LED and OLED devices are driven under the same driving voltage, then the driving circuit structure is simplified, but display differences occur due to different optoelectronic characteristics
Solution Approach 1:
The patent divides the power supply system into two independent parts: a first power supply alignment providing a first common voltage to Micro-LED devices, and a second power supply alignment providing a second common voltage to OLED devices. This segmentation allows independent voltage optimization for each device type while maintaining a unified driving circuit architecture, thereby resolving the contradiction between circuit simplicity and display uniformity.
2Illumination intensity
If red Micro-LED is used, then the display panel can achieve high brightness, but luminous efficiency is low
Solution Approach 1:
The patent independently optimizes the common voltage parameter for Micro-LED devices through the first power supply alignment, allowing the voltage to be specifically tuned to improve luminous efficiency while maintaining high brightness output. This parameter optimization resolves the contradiction between brightness and energy efficiency for red Micro-LEDs.
3Illumination intensity
If OLED is used, then the display panel can achieve good color performance, but light efficiency is low and material life is short
Solution Approach 1:
The patent independently optimizes the common voltage parameter for OLED devices through the second power supply alignment, allowing precise control of operating conditions to extend material life and improve light efficiency while maintaining color performance. This resolves the contradiction between OLED's color advantages and its limitations in efficiency and durability.
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 solution enhances light-emitting efficiency, extends the service life of the display panel, and improves production costs by allowing for independent optimization of different light-emitting technologies, thereby addressing the limitations of both Micro-LED and OLED technologies.
Implementation Method 1
the first power supply alignment is electrically connected to the third light-emitting unit for providing a first common voltage to the third light-emitting unit; the second power supply alignment is electrically connected to the first light-emitting unit and the second light-emitting unit for providing a second common voltage to the first light-emitting unit and the second light-emitting unit
Data Source
AI summary
A display panel, including light-emitting units, arranged in a matrix and including a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit of different colors; and subpixel driving circuits, in a one-to-one correspondence with and electrically connected to the light-emitting units for providing driving signals to the light-emitting units. Each of the first light-emitting unit and the second light-emitting unit includes an OLED or QLED, and the third light-emitting unit includes a Micro-LED. The display panel further includes a first power supply alignment and a second power supply alignment; the first power supply alignment is electrically connected to the third light-emitting unit for providing a first common voltage to the third light-emitting unit; the second power supply alignment is electrically connected to the first light-emitting unit and the second light-emitting unit for providing a second common voltage to the first light-emitting unit and the second light-emitting unit.