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US 2011/0084618 A1Published application
Led driving circuit having a large operational range in voltage
AssigneeAnalog Integrations Corporation
InventorsChin-Feng Kang, Meng-Hung Lin
Life of this patent
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Abstract
An LED driving circuit includes a current selecting circuit. The current selecting circuit controls the current transmission path in the plurality of LEDs according to respective threshold voltages of corresponding LEDs and a plurality of current limits.
Claims19
A driving circuit having a large operational voltage range and configured to drive a plurality of serially-coupled luminescent units, the driving circuit comprising:
- a current-selecting circuit configured to control current paths in the plurality of luminescent units according to a plurality of current limits and respective threshold voltages of corresponding light emitting diodes in the plurality of luminescent units.
A display device having a large operational voltage range and comprising:
- a plurality of serially-coupled luminescent units;
- a power supply circuit coupled to plurality of serially-coupled luminescent units;
- and
- a driving circuit configured to drive the plurality of serially-coupled luminescent units, the driving circuit comprising:
- a current-selecting circuit configured to control current paths in the plurality of luminescent units according to a plurality of current limits and respective threshold voltages of corresponding light emitting diodes in the plurality of luminescent units.
2 more elements
Dependencies are inferred from the claim text.