Single Driver Circuit for Multi-Color LED Control
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Solution Overview
Problem
Existing LED driver circuits require separate circuits for each color of LED, such as red, green, and blue, to generate specific light colors, which is inefficient and complex for generating white light or multiple colors simultaneously.
Innovation Solution
A single driver circuit with a switching LED cell that can switch between radiating and disabled modes at a specific frequency, allowing multiple LEDs to be controlled independently for various color combinations, including white light, using a power source and semiconductor switches to manage LED current flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate driver circuits are used for each color LED (red, green, blue), then each LED can be independently controlled to provide proper color ratios, but the device complexity increases and efficiency decreases
Solution Approach 1:
The patent combines multiple separate driver circuits into a single integrated driver circuit that can control multiple LEDs of different colors. The driver circuit includes a controller that selectively activates different LEDs and adjusts their current levels to achieve desired color combinations, thereby reducing the number of separate driver circuits from three (one for each color) to one unified circuit.
Solution Approach 2:
The single driver circuit is designed with multi-functional capability to control various types of LEDs (red, green, blue, amber) and generate multiple colors including white light. The controller can selectively drive different LED combinations and adjust their intensity ratios to produce various colors, making the driver circuit universal rather than dedicated to a single function or color.
2Measurement precision
If multiple separate driver circuits are used to control different colored LEDs, then proper color ratios can be achieved, but the overall system efficiency decreases
Solution Approach 1:
By merging multiple driver circuits into one, the patent reduces power consumption associated with multiple separate circuit operations while maintaining precise color ratio control through a unified controller that coordinates all LED outputs.
Solution Approach 2:
The universal driver circuit can dynamically switch between controlling different LED combinations for various colors, improving system efficiency by using a single optimized control path rather than multiple dedicated circuits, while still achieving precise color ratios through programmable current control.
3Device complexity
If a single driver circuit controls multiple LEDs for various colors, then device complexity is reduced, but the requirement for independent control capacity for each LED increases
Solution Approach 1:
The single driver circuit incorporates multi-functional control capabilities through a programmable controller that can independently manage each LED type (red, green, blue, amber) and adjust their individual current levels. This allows the circuit to selectively activate different LED combinations and control their intensity ratios to produce various colors including white light, thereby achieving high adaptability within a unified circuit architecture.
Solution Approach 2:
The driver circuit employs dynamic control where the controller can change operating parameters in real-time to independently adjust each LED's output. The circuit transitions between different operating modes to control different LED combinations, providing flexible and independent control capacity for multiple LEDs while maintaining a single circuit structure.
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
Enables efficient and flexible control of multiple LEDs to produce a wide range of colors, including white light, by using a single driver circuit, reducing complexity and increasing operational efficiency.
Implementation Method 1
one or more LEDs for radiating a light of any color
Implementation Method 2
a LED current flows from the power source through the LED(s) whereby the LED(s) radiate the light
Data Source
AI summary
A LED driver circuit (70, 80) employs a power source (IS, VS) for providing power at a power conversion frequency to a switching LED cell (30-32, 40-42). The switching LED cell (30-32, 40-42) switches between a radiating mode and a disabled mode at a LED driving frequency. In the radiating mode, the switching LED cell (30-32, 40-42) controls a flow of a LED current from the power source (IS, VS) through one or more LEDs (L11-LXY) to radiate a color of light from the LEDs (L11-LXY). In the disabled mode, the switching LED cell (30-32, 40-42) impedes the flow of the LED current from the power source (IS, VS) through the LEDs (L11-LXY).