LIGHT-EMITTING DIODE DRIVING APPARATUS
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Oct 16, 2014
app pub date -
Aug 5, 2013
filing date -
Apr 16, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A light-emitting-diode (LED) driving apparatus including an AC-DC power conversion stage, a balance circuit and a pulse-width-modulation (PWM) control unit is provided. In the present invention, the LED driving apparatus balances currents flowing through all LED strings by using the balance circuit such that a purpose of current matching is achieved accordingly. In addition, the LED driving apparatus may control the PWM control unit according to an equation between an independent DC output voltage generated by the AC-DC power conversion stage and a control voltage provided by the balance circuit without adopting any boost converter so as to indirectly change a DC output voltage used for directly driving all LED strings and generated by the AC-DC power conversion stage. In this way, the purpose of low cost and high efficiency can be achieved accordingly.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully