Integrated LED Display Driving Circuit for Compact PCB Design
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Solution Overview
Problem
LED displays face issues of large PCB area occupation, low refresh rate, and high power consumption due to the existing split placement mode of P-MOS transistors and LED driving circuits, which leads to inefficient power management and design complexity.
Innovation Solution
An LED display system incorporating a switching circuit with field effect transistors and a control circuit that integrates a power supply control circuit to manage power distribution efficiently across R, G, and B LEDs, reducing the PCB area requirement and enhancing refresh rate while lowering power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If split placement mode is adopted for P-MOS transistors and LED driving circuits, then the design of unit board is simplified, but the PCB area is large and refresh rate is low
Solution Approach 1:
The patent merges the P-MOS transistor and LED driving circuit into a single integrated circuit chip, eliminating the need for separate placement on the PCB. This integration dramatically reduces the PCB area occupied by control circuits while maintaining the functional separation and control simplicity achieved through the split placement design approach.
2Ease of manufacture
If split placement mode is adopted for P-MOS transistors and LED driving circuits, then the design of unit board is simplified, but the refresh rate is low
Solution Approach 1:
By integrating the P-MOS transistor and LED driving circuit into a single chip, the patent reduces the number of external connection lines and signal transmission paths. This integration enables faster signal processing and scanning, thereby increasing the refresh rate while preserving the design simplicity achieved through functional separation.
3Power
If traditional LED driving circuit is used, then the power consumption is high, but the power management efficiency is low
Solution Approach 1:
The patent implements dynamic power management by controlling the P-MOS transistor switching based on real-time display requirements. The integrated circuit enables dynamic adjustment of power supply to LED particles, allowing the system to reduce power consumption during low-activity periods while maintaining high power delivery when needed, thus improving overall power management efficiency.
Solution Approach 2:
The patent incorporates feedback mechanisms in the integrated LED driving circuit that monitor LED current and voltage, allowing real-time adjustment of power delivery. This feedback control optimizes power consumption by ensuring efficient power usage across different display conditions, addressing the high power consumption issue while improving power management efficiency.
Data Source
AI summary
A Light-Emitting Diode (LED) display includes: an LED display panel; and a display driving circuit, including a switching circuit and a control circuit, wherein the switching circuit comprises first and second switching sub-circuits; the first switching sub-circuit includes one or more field effect transistors; the second switching sub-circuit includes one or more field effect transistors; the control circuit includes a power supply control circuit connected with a third end of the switching circuit through a power supply control port. The switching circuit and the control circuit are integrated in the display driving circuit, and the two switching sub-circuits control the power supply of R/G/B LEDs in an LED particle array with M lines and N columns in the LED display panel respectively, so that the effects of small PCB area occupied by the control circuit, simple design, high refresh rate and low power consumption of the LED display are achieved.