Light-emitting element driving device
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United States of America Patent
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Jan 2, 2024
Grant Date -
Mar 23, 2023
app pub date -
Aug 19, 2022
filing date -
Sep 16, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure provides a light emitting element driving device. The light emitting element driving device includes a constant current circuit and a current detection unit. The constant current circuit includes: a first transistor including a first end, a second end and a control end connected to an external terminal; a current setting resistance connected to the second end of the first transistor; and a drive amplifier including a first input end connected to a first node to which the first transistor and the current setting resistance are connected, a second input end to which a current set voltage is applied, and an output end connected to the control end of the first transistor. The current detection unit generates a current detection signal based on a feedback voltage generated in the first node.
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