Light-Emitting Substrate Power Feedback for Simpler LED Driving
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Solution Overview
Problem
Conventional light emitting substrates for micro and mini LED displays have complex circuit structures and high costs due to the use of multiple DC-DC power supply modules for each light emitting diode, necessitating a more efficient and cost-effective power supply solution.
Innovation Solution
A power supply module with a power supply unit and feedback line that supplies power to multiple light emitting modules, adjusting voltage based on feedback signals to simplify the circuit and reduce the number of power supply modules, using an AC-DC converter to convert AC voltage into DC voltage for driving the LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple DC-DC power supply modules are provided for each light emitting diode area, then each light emitting diode can be driven to emit light, but the circuit structure becomes complex and cost increases
Solution Approach 1:
The patent merges multiple DC-DC power supply modules into a single power supply module that can serve multiple light emitting diode areas. The power supply module includes a power supply unit with voltage output terminal and signal receiving terminal, connected to multiple light emitting modules through power supply lines and feedback lines, enabling one module to replace several while maintaining driving capability
Solution Approach 2:
The power supply module is designed with universal functionality to drive light emitting diodes across multiple areas. The power supply unit can dynamically adjust output voltage based on feedback signals from any connected light emitting module, making the single module capable of serving multiple previously dedicated areas
2Reliability
If multiple DC-DC power supply modules are provided for each light emitting diode area, then each light emitting diode can be driven to emit light, but the cost becomes too high
Solution Approach 1:
By combining multiple power supply modules into one, the patent reduces the total number of modules required, directly lowering component costs, assembly costs, and manufacturing complexity while maintaining the ability to drive all light emitting diode areas
Solution Approach 2:
The universal power supply module design allows a single module to perform the function of multiple dedicated modules, reducing overall system cost while maintaining full driving capability across all light emitting diode areas through dynamic voltage adjustment based on feedback
3Device complexity
If a single power supply module supplies power to multiple light emitting modules with dynamic voltage adjustment, then the circuit structure is simplified and cost is reduced, but voltage adjustment control is required
Solution Approach 1:
The patent implements feedback control where each light emitting module connects its feedback terminal to the power supply unit's signal receiving terminal through feedback lines. The power supply unit automatically adjusts its output voltage based on feedback signals from the light emitting modules, enabling automated voltage regulation without complex manual control mechanisms
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 simplified circuit structure reduces costs and improves product competitiveness by minimizing the number of power supply modules, while dynamically adjusting voltage to ensure proper LED operation and reduce power consumption.
Implementation Method 1
a conventional light emitting substrate may be provided with an Alternating Current (AC)-Direct Current (DC) power supply module for converting an AC voltage supplied from an external power supply into a DC voltage
Implementation Method 2
the power supply module is configured to control the voltage output terminal to output a power supply voltage based on a feedback signal received by the signal receiving terminal
Data Source
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AI summary
The present application discloses a light emitting substrate and a driving method. The light emitting substrate includes: a power supply module, where the power supply module includes a power supply unit, a power supply line and a feedback line, the power supply unit includes a voltage output terminal and a signal receiving terminal, and the power supply module is configured to control the voltage output terminal to output a power supply voltage based on a feedback signal received by the signal receiving terminal; and a plurality of light emitting modules configured to be driven by the power supply voltage to emit light and output the feedback signal to the power supply unit based on the power supply voltage.