Micro-LED Pixel Driving for High Brightness at Low Power
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Solution Overview
Problem
Existing self-luminous display devices, such as OLED and LED displays, face challenges in achieving high brightness without increasing conduction currents and overall power consumption.
Innovation Solution
The micro-LED display device employs a driving circuit with a second driving mode, where K sub-pixel areas of each pixel area are driven to display the same image colors when a row of pixel areas is enabled, significantly increasing brightness without increasing conduction currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If voltage is increased to increase conduction current to meet high-brightness requirement, then brightness is improved, but drive circuit load and overall power consumption increase
Solution Approach 1:
The pixel area is divided into multiple sub-pixel areas (first sub-pixel area and second sub-pixel area), each capable of independent light emission. By segmenting the pixel into multiple functional units that can operate simultaneously or sequentially, the display achieves higher brightness through combined light output without requiring increased voltage or current per sub-pixel, thus maintaining lower power consumption.
2Illumination intensity
If voltage is increased to increase conduction current to meet high-brightness requirement, then brightness is improved, but drive circuit load increases
Solution Approach 1:
The pixel area is divided into multiple sub-pixel areas (first sub-pixel area and second sub-pixel area), each capable of independent light emission. By segmenting the pixel into multiple functional units that can operate simultaneously or sequentially, the display achieves higher brightness through combined light output without requiring increased voltage or current per sub-pixel, thus maintaining lower power consumption.
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 approach effectively meets the high-brightness requirement of micro-LED display devices while maintaining low power consumption and avoiding increased conduction currents.
Implementation Method 1
each sub-pixel area has J micro-LEDs with different colored lights
Data Source
AI summary
A micro-LED display device mainly has a plurality of pixel areas arranged in matrix and a driving circuit. Each pixel area has a plurality of sub-pixel areas arranged adjacent to each other. In a first driving mode, the driving circuit enables the rows of pixel areas in sequence. When one of rows of pixel areas is enabled, the driving circuit controls one sub-pixel area of each pixel area on the enabled row of pixel areas to display an image color. In a second driving mode, the rows of pixel areas are also enabled in sequence. When one of rows of pixel area is enabled, the driving circuit drives all sub-pixel areas of each pixel area on the enabled row of pixel area to synchronously display the same image color. Therefore, a high-brightness requirement is met, and the overall power consumption is not increased.