Mini-LED Driving Circuit with Current Mirror and Dimming Module
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Solution Overview
Problem
Current driving systems for Mini-LED and Micro-LED panels are complex and costly, necessitating a simplification to reduce costs.
Innovation Solution
A driving circuit comprising a current mirror module, a dimming module, and a light emitting device, where the current mirror module outputs different currents based on control signals, and the dimming module amplifies these currents to generate driving currents for the light emitting device, allowing for varying brightness and reducing the load on the current mirror module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complex driving system is used to achieve precise control of Mini-LED/Micro-LED panels, then display quality is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the current mirror function from the complex driving system and implements it using a simplified circuit configuration. By separating the current generation and control functions into distinct modules (current mirror module, dimming module), the system achieves precise control with reduced overall complexity
Solution Approach 2:
The current mirror module serves multiple functions: it generates reference current, provides current mirroring for precise control, and enables dimming operation. This multi-functionality reduces the need for separate dedicated circuits, thereby simplifying the overall driving system while maintaining display quality
2Manufacturing precision
If a complex driving system is used to achieve precise control of Mini-LED/Micro-LED panels, then display quality is improved, but cost increases
Solution Approach 1:
The patent merges the current mirror function and dimming control function into an integrated circuit structure. The current mirror module and dimming module work together in a unified design, reducing the number of separate components and lowering manufacturing costs while maintaining precise control capability
Solution Approach 2:
The patent employs standard electronic components (resistors, transistors, capacitors) that are inexpensive and readily available. By using these common components in a simplified circuit architecture, the system achieves cost-effectiveness without compromising the precision required for high-quality display
3Illumination intensity
If the current mirror module outputs higher currents to drive the light emitting device, then brightness control is improved, but the load on the current mirror module increases
Solution Approach 1:
The dimming module acts as an intermediary between the current mirror module and the light emitting device. It receives the mirrored current from the current mirror module and amplifies or regulates it to the appropriate level for driving the LED, thereby protecting the current mirror module from direct high-current load while still enabling effective brightness control
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 solution simplifies the driving circuit, reduces costs, and enables the light emitting device to operate normally with adjustable brightness, effectively addressing the complexity and cost issues of existing systems.
Implementation Method 1
a reference current unit configured to provide a reference current; and a current output control unit connected to the reference current unit and configured to output corresponding total currents according to a control signals
Implementation Method 2
a dimming module connected to the current mirror module and configured to amplify the currents to generate driving currents
Implementation Method 3
a light emitting device connected to the dimming module and correspondingly emitting light with different brightness according to different driving currents
Data Source
AI summary
A driving circuit and a panel are provided. In the driving circuit, a current mirror module is configured to output different currents according to different control signals, a dimming module is connected to the current mirror module and configured to amplify the currents to generate driving currents, and a light emitting device is connected to the dimming module and correspondingly emits light with different brightness according to different driving currents.