Micro LED Pixel Series Wiring for Unified Driving Voltage
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Solution Overview
Problem
Micro LED display devices face high power consumption due to the need for different forward bias voltages to drive micro LEDs of varying light colors, which complicates the driving substrate's ability to efficiently provide the necessary voltages.
Innovation Solution
The implementation of a series-connection structure within each display pixel, where micro light-emitting elements of the same wavelength range are connected in series, allowing the circuit substrate to provide a single driving voltage for both the series-connected and non-series-connected elements, optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different forward bias voltages are provided to micro LEDs of different light colors, then each micro LED can be driven to emit light, but power consumption increases
Solution Approach 1:
The patent merges micro LEDs of different light colors into series-connection structures within display pixels. By connecting micro LEDs (e.g., red, green, blue) in series, the circuit substrate can provide a unified driving voltage to all series-connected elements, eliminating the need for multiple different voltage levels and thereby reducing power consumption while maintaining driving capability
Solution Approach 2:
The patent changes the electrical connection parameter from parallel to series configuration. By transforming the circuit topology from parallel (requiring different voltages for different colors) to series (allowing unified voltage), the driving voltage parameter is standardized across different light colors, reducing overall power consumption
2Reliability
If different forward bias voltages are provided to micro LEDs of different light colors, then each micro LED can be driven to emit light, but device complexity increases
Solution Approach 1:
The patent merges multiple micro LEDs of different light colors into series-connection structures within display pixels. By connecting micro LEDs (e.g., red, green, blue) in series, the circuit substrate can provide a unified driving voltage to all series-connected elements, eliminating the need for multiple different voltage levels and thereby reducing power consumption while maintaining driving capability
Solution Approach 2:
The patent makes the circuit substrate's driving capability universal by enabling it to drive all micro LEDs in a display pixel through a single voltage level. The series-connection structure allows one driving voltage to serve multiple different light colors simultaneously, simplifying the driving substrate's design and reducing its complexity
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 configuration reduces power consumption by enabling the same driving voltage to be applied across micro LEDs of different colors, improving efficiency and reducing energy expenditure.
Implementation Method 1
micro light-emitting diode (micro LED) display device is a technology of miniaturizing and matrixing LED
Data Source
AI summary
A micro light-emitting diode display device includes a circuit substrate and a plurality of display pixels. The display pixels are arranged on the circuit substrate and are respectively electrically connected to the circuit substrate. Each display pixel includes a plurality of micro light-emitting elements. In each display pixel, a part of the micro light-emitting elements form at least one series-connection structure, and the micro light-emitting elements of the series-connection structure are within a wavelength range of the same lighting color. The circuit substrate respectively provides a same driving voltage to drive the micro light-emitting elements included in the series-connection structure of each display pixel and the micro light-emitting elements excluded from the series-connection structure.