Mini LED Drive Circuit With Feedback Voltage Stabilization
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Solution Overview
Problem
Existing display devices face challenges in providing stable voltage or current to mini LEDs, leading to uneven brightness due to fluctuations in backlight voltage or current.
Innovation Solution
A drive circuit is designed with a switch power supply circuit, feedback circuit, pulse circuit, and switch circuit to regulate and stabilize the voltage supplied to mini LEDs, ensuring it remains within a preset range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple power supply circuit is used, then the device complexity is reduced, but the voltage or current stability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the drive circuit monitors the actual voltage or current supplied to the mini LED and adjusts its output accordingly. The controller compares the measured voltage/current with a reference value and dynamically adjusts the power supply output to maintain stability, directly resolving the contradiction between simple circuit design and voltage stability requirements.
Solution Approach 2:
The patent employs dynamic adjustment capabilities where the drive circuit can change its operating parameters in real-time based on load conditions. The circuit transitions from a static power supply design to a dynamic one that adapts to varying mini LED requirements, maintaining voltage stability without requiring an overly complex fixed circuit design.
2Illumination intensity
If voltage or current is increased to improve brightness, then illumination intensity is improved, but uniformity of light emission deteriorates
Solution Approach 1:
The drive circuit incorporates feedback monitoring that detects variations in voltage or current across different mini LED regions. When non-uniformity is detected, the controller adjusts the power distribution to compensate, ensuring uniform brightness while maintaining high illumination intensity. This feedback mechanism allows the system to achieve both high brightness and uniformity simultaneously.
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 drive circuit effectively stabilizes the voltage or current provided to mini LEDs, resulting in uniform light emission and improved display performance.
Implementation Method 1
a switch power supply circuit for boosting or reducing a first voltage to obtain a second voltage
Data Source
AI summary
Disclosed are a drive circuit, a light-emitting circuit and a display device. The drive circuit is connected to a load element. The drive circuit includes a switch power supply circuit for boosting or reducing a first voltage; a feedback circuit for receiving a feedback voltage of the load element, and generating a control signal in response that the feedback voltage is not within a preset voltage range; a pulse circuit for generating a switch signal with a first preset frequency; and a switch circuit. The switch circuit is for transmitting the control signal to the control end of the switch tube in response to receiving the control signal, and the switch circuit is for transmitting the switch signal to the control end of the switch tube in response to not receiving the control signal.