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US 2026/0086141 A1Published application
Circuit detection and light emitting diode controllers
AssigneeTexas Instruments Incorporated
InventorsWentao Xu, Yurong Zhang, Shangquan Liang, Yichao Tang
Life of this patent
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Abstract
An example detection circuitry includes a bypass circuitry configured to selectively bypass a series of light emitting diodes from a light emitting diode driver, a first voltage detection circuitry configured to compare a voltage at a first terminal of the series of light emitting diodes to a first reference voltage and output a first indication of the comparison, and a logic circuitry configured to output a circuit type based on the first indication.
Claims20
A detection circuitry comprising:
- a bypass circuitry configured to selectively bypass a series of light emitting diodes from a light emitting diode driver;
- a first voltage detection circuitry configured to compare a voltage at a first terminal of the series of light emitting diodes to a first reference voltage and output a first indication of the comparison;
- and
- a logic circuitry configured to output a circuit type based on the first indication.
1 more element
A detection circuitry comprising:
- a switch having a first terminal configured to be coupled to a first terminal of a series of light emitting diodes and a second terminal to be coupled to a second terminal of the series of light emitting diodes;
- a first comparator having a first input terminal coupled to the second terminal of the series of light emitting diodes and a second terminal coupled to a first reference voltage;
- a second comparator having a first input terminal coupled to the first terminal of the series of light emitting diodes and a second terminal coupled to a second reference voltage;
- and
- a logic circuitry having a first input terminal coupled to an output of the first comparator, a second input terminal coupled to an output of the second comparator, and the logic circuitry configured to output an indication of a circuit type of a controller of the series of light emitting diodes.
2 more elements
A light emitting diode controller comprising:
- a current source;
- a current sink;
- a driver coupled to the current source and the current sink;
- a transistor coupled to an output of the driver;
- a switch having a first terminal to be coupled to an anode of a series of light emitting diodes and a second terminal configured to be coupled to a cathode of the series of light emitting diodes;
- a first comparator having a first input terminal coupled to the cathode of the series of light emitting diodes and a second terminal coupled to a first reference voltage;
- a second comparator having a first input terminal coupled to the anode of the series of light emitting diodes and a second terminal coupled to a second reference voltage;
- and
- a logic circuitry having a first input terminal coupled to an output of the first comparator, a second input terminal coupled to an output of the second comparator, and an output to output an indication of a circuit type of a controller of the series of light emitting diodes to the current source and current sink.
6 more elements
Dependencies are inferred from the claim text.