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US 2013/0093340 A1Published application
Light emitting apparatus and led driving method using the same
AssigneeSamsung Electronics Co., Ltd.
InventorsMamoru HORINO, Yoshio FUJIMURA, Masami NEI
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Abstract
Provided are a light emitting apparatus and a LED driving method using the same. The light emitting apparatus may include: a light source including first to nth LED groups driven by direct current (DC) power and sequentially connected in series; and a driving controller detecting a current flowing in an output terminal of the light source and changing the number of LED groups driven in the light source when the detected current is outside of a predetermined current range.
Claims20
A light emitting apparatus, comprising:
- a light source comprising first to nth light emitting device (LED) groups driven by direct current (DC) power and sequentially connected in series;
- and
- a driving controller which detects a current flowing in an output terminal of the light source and changes a number of LED groups, among the first to nth LED groups, driven in the light source in response to the detected current being outside of a predetermined current range.
An LED driving method, comprising:
- detecting a current flowing in first to nth LED groups sequentially connected in series and driven by DC power;
- setting a driving current range for controlling the current flowing in the first to nth LED groups;
- and
- controlling a number of driven LED groups, among the first to nth LED groups, to be changed in response to the detected current being outside of the set driving current range.
1 more element
An LED driving method, comprising:
- detecting a current flowing in first to nth LED groups sequentially connected in series and driven by DC power;
- and
- controlling a number of driven LED groups, among the first to nth LED groups, to be changed in response to the detected current being outside of a predetermined current range.
Dependencies are inferred from the claim text.