Light adjustment device and method of LED (Light Emitting Diode) high-voltage direct current centralized power supply system
A centralized power supply, high-voltage DC technology, applied in electric light sources, lighting devices, lamp circuit layout, etc., can solve problems such as individual dimming, and achieve the effects of improving luminous efficiency, ensuring long life, and convenient dimming
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0031] Such as figure 1 As shown, a dimming device for an LED high-voltage DC centralized power supply system includes a power management module A, a DC power supply module B, and N current regulation modules C 1 ,C 2 ,...C N and N loads D 1 ,D 2 ,...D N , the N≥1, the output terminal of each current regulation module is connected to the load.
[0032] The power supply module control signal output terminal of the power management module A is connected to the control signal receiving terminal of the DC power supply module B, and the positive output terminal of the DC power supply module B and the sawtooth wave signal v of the power management module A saw1 The output terminals are respectively connected with N current regulation modules C 1 ,C 2 ,...C N The input terminal of the DC power supply module B is connected to the ground, and the output terminal of each current regulation module is connected to the load.
[0033] The DC power supply module B is composed of a P...
Embodiment 2
[0046] Connect the circuit as shown in Example 1, as image 3 As shown, there are two current regulation modules in the figure, the two power regulation modules are respectively connected to the load D1 and the load D2, the high level amplification factor is 2, and the low level amplification factor is 1.5. Figure 4(a)-Figure 4(b) shows the current waveforms flowing in different loads before dimming. When uniform dimming is performed, the current waveforms flowing in all LED loads are shown in Figure 5(a)-Figure 5 As shown in (b); when performing individual dimming, the current waveforms flowing in different LED loads are shown in Figure 6(a)-Figure 6(b).
[0047] The present invention adjusts the output voltage of the DC power supply module or adjusts the sawtooth wave signal v saw1 The peak value or cycle of the reference current is changed to change the average value of the current flowing through the LED load within a cycle to achieve LED brightness adjustment.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com