LED Control Circuit Merging RGB Groups to Reduce Power
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Solution Overview
Problem
Conventional light emission control circuits for liquid crystal display devices using multiple LEDs result in large-scale power source circuits, leading to increased costs and power consumption, especially when multiple voltage boosting and control circuits are required for each color LED.
Innovation Solution
A light emission control circuit that includes a power source circuit and a current detecting unit to supply power to multiple light emitting device groups connected in parallel, with a power source controlling unit that adjusts power based on detected currents to ensure efficient current delivery, simplifying the circuit configuration and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple voltage boosting and control circuits are mounted for each color LED, then constant current can be supplied to each LED group, but the circuit becomes large-scaled and costs increase
Solution Approach 1:
The patent combines multiple LED groups (red, green, blue LEDs) into a single series connection, eliminating the need for separate voltage boosting circuits for each color. One unified control circuit now manages all LED groups, drastically reducing circuit complexity while maintaining constant current supply stability through centralized control.
Solution Approach 2:
The single voltage boosting circuit and control circuit are designed to universally drive all three color LED groups (red, green, blue) simultaneously. This multi-functional approach replaces the need for dedicated circuits for each color, reducing overall circuit scale while ensuring reliable constant current supply to each LED group.
2Reliability
If three sets of circuits are used to supply constant current to red, green, and blue LEDs, then each LED group receives stable current, but the power source circuit becomes large-scaled and costs rise
Solution Approach 1:
The patent merges the functions of three separate constant current supply circuits into a single unified control circuit that manages all LED groups. This consolidation reduces the number of components, simplifies manufacturing, and lowers costs while maintaining stable current supply to each color LED through centralized monitoring and adjustment.
Solution Approach 2:
The unified control circuit is designed with universal functionality to drive all three color LED groups (red, green, blue) simultaneously with stable current. This multi-functional design eliminates the need for three separate circuit sets, reducing manufacturing complexity and cost while ensuring reliable current supply to each LED group.
3Power
If a voltage boosting circuit is mounted for each color LED, then adequate voltage can be supplied to each LED group, but the circuit scale increases and costs increase
Solution Approach 1:
The patent combines all voltage boosting functions into a single unified voltage boosting circuit that supplies adequate voltage to all three color LED groups (red, green, blue) simultaneously. This eliminates the need for three separate voltage boosting circuits, drastically reducing circuit scale while maintaining sufficient voltage supply capability for each LED group through centralized voltage regulation.
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 solution simplifies the power source circuit, reduces costs, and minimizes power consumption by efficiently controlling current delivery to LEDs, allowing for effective light emission with desired chromaticity and luminance while avoiding unnecessary power wastage.
Implementation Method 1
a light source made up of a light emitting device such as an LED (light-emitting diode)
Data Source
AI summary
There is provided a light emission control circuit being capable of simplifying a power source circuit reducing costs and power consumption. A constant current circuit is serially connected to a specified light emitting device group out of a plurality of light emitting device groups and a power source circuit supplies power to each light emitting device group and a current detecting unit detects a current flowing through a specified light emitting device group and a power control unit controls a power source circuit based on a pre-set current value and on a detected value.