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An LED Drive Circuit with Constant-Output-Current Control and Constant-Luminance Control
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Description
A Single LED is very small, and their luminance is related to the amount of driving current. Sufficient luminance for an illuminator requires many LEDs to be connected together and a constant current supplied to each LED. Therefore, the LED drive circuit must have constant-output-current control and/or constant-luminance control. We propose an LED drive circuit that consists of a boost-type DC-DC converter with constant-output-current control and constant-luminance control. This circuit is a switching regulator-type circuit controlled by pulse width modulation (PWM). Both the power and the constant-current control can be provided by a single system, without any ballast resistor or auxiliary current control circuit.
Journal
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- INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference
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INTELEC 06 - Twenty-Eighth International Telecommunications Energy Conference 2006 1-6, 2006-11
IEEE
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Details 詳細情報について
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- CRID
- 1050011097116816128
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- NII Article ID
- 10029800241
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- NII Book ID
- AA11087061
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- ISSN
- 02750473
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- HANDLE
- 10069/22596
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- Text Lang
- en
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- Article Type
- conference paper
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- Data Source
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- IRDB
- CiNii Articles
- OpenAIRE