Lighting Apparatus Color Temperature Control Circuit
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Solution Overview
Problem
Semiconductor light emitting elements, such as LEDs, experience variations in brightness when adjustments are made to color temperature, posing a challenge in maintaining consistent lighting performance.
Innovation Solution
A lighting apparatus comprising multiple light-emitting arrays connected in series and parallel, with a color temperature controller and balance circuit to manage the on/off states and adjust color temperature, allowing for user-controlled output between different color temperatures while maintaining consistent brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If color temperature is adjusted in semiconductor light emitting elements, then color temperature varies, but brightness becomes inconsistent
Solution Approach 1:
The patent divides the light emitting elements into multiple groups with different color temperatures (first group, second group, third group). By controlling these segmented groups independently, the system can adjust overall color temperature while maintaining consistent brightness through balanced individual group outputs.
Solution Approach 2:
The patent changes the operating parameters (current, voltage, or power) of individual light emitting element groups to compensate for brightness variations. When color temperature is adjusted by changing the mix of active groups, the parameters of each group are simultaneously adjusted to maintain uniform total brightness output.
2Adaptability or versatility
If multiple light emitting arrays with different color temperatures are used, then color temperature control flexibility improves, but circuit complexity increases
Solution Approach 1:
The patent segments the light emitting arrays into distinct groups connected in parallel, with each group containing elements of specific color temperatures. This segmentation allows independent control of each group while maintaining a relatively simple parallel circuit structure, achieving flexibility without excessive complexity.
Solution Approach 2:
The patent designs the circuit to serve multiple functions: it can control color temperature by selecting different group combinations, adjust brightness by varying power to individual groups, and maintain consistent output across different configurations. This multi-functionality reduces the need for separate dedicated circuits for each control objective.
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 precise control over color temperature and brightness, addressing the issue of brightness variations and providing a flexible lighting solution that meets user preferences.
Implementation Method 1
Semiconductor light emitting elements (such as light emitting diodes (LEDs)) have low power consumption, high luminance, and long life compared to other types of lighting elements
Data Source
AI summary
A lighting apparatus includes first and second light emitting areas, a color temperature controller, and a balance circuit. The first light emitting area includes first light-emitting arrays connected in series and outputs light of a first color temperature. The second light emitting area includes second light-emitting arrays connected in series and connected to the first light emitting area in parallel. The second light-emitting arrays output light of a second color temperature different from the first color temperature. The color temperature controller is selectively connected to at least one of an input node of the first light emitting area and an input node of the second light emitting area. The color temperature controllers determines an on/off state of the first and second light emitting areas. The balance circuit is connected to at least one of the first and second light emitting areas in series.