Lamp Circuit Unit AC-DC Conversion Dimming Signal Processing
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Solution Overview
Problem
Existing lamps lack the ability to adjust light intensity using a standard wall switch and are costly due to the need for complex circuit units with parallel paths for light-emitting and loudspeaker components, which increases manufacturing costs and reduces functionality.
Innovation Solution
A circuit unit for lamps comprising a first power stage for AC-DC conversion and dimming signal generation, and a second power stage that adjusts power signals based on dimming signals to drive both light-emitting and loudspeaker units, allowing for adjustable light intensity and constant voltage output without parallel circuit paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a phase cut dimmer is used to adjust light intensity, then light brightness can be controlled, but the circuit unit size increases and manufacturing cost increases
Solution Approach 1:
The patent combines the AC-DC conversion function and the dimming signal conversion function into a single power stage circuit. The power stage simultaneously performs rectification, filtering, and dimming signal processing, eliminating the need for separate dimming control circuits and reducing overall circuit complexity and component count.
Solution Approach 2:
The power stage is designed to perform multiple functions: it converts AC power to DC power for the light-emitting unit, extracts dimming signals from the phase cut dimmer output, and regulates power delivery based on dimming requirements. This multi-functional design reduces the need for dedicated circuits for each function, thereby reducing circuit unit size.
2Reliability
If parallel circuit paths are provided for light-emitting unit and loudspeaker apparatus, then both components can operate stably, but manufacturing cost increases
Solution Approach 1:
The patent segments the power delivery function into two distinct output paths from a single power stage: one path provides constant voltage to the light-emitting unit through dedicated switching and regulation circuits, while another path provides constant voltage to the loudspeaker apparatus through separate regulation circuits. This segmentation allows each component to receive optimized power while sharing the initial AC-DC conversion stage, reducing overall circuit complexity and manufacturing cost.
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 adjustable light intensity using a standard wall switch, reduces manufacturing costs by simplifying the circuit unit, and ensures stable operation of both light-emitting and loudspeaker components.
Implementation Method 1
performs an Alternating Current—Direct Current (AC-DC) conversion on the first power signal to produce a second power signal
Data Source
AI summary
Provided are a circuit unit for a lamp and the lamp including the circuit unit. The circuit unit for the lamp may include: a first power stage receiving a first power signal from an Alternating Current (AC) power supply, performing an Alternating Current—Direct Current (AC-DC) conversion for the first power signal to generate a second power signal and performing a dimming signal conversion for the first power signal to generate a first dimming signal, and a second power stage connected with the first power stage to receive the second power signal output from the first power stage, herein, the second power stage adjusts the second power signal based on at least the first dimming signal, in this way a third power signal is generated, and the second power stage provides a light-emitting unit of the lamp with the third power signal to drive the light-emitting unit.