Systems and methods for bleeder control related to lighting emitting diodes
AssigneeOn-Bright Electronics (Shanghai) Co., Ltd.
InventorsLiqiang Zhu, Jun Zhou, Lieyi Fang
Life of this patent
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Abstract
System and method for controlling one or more light emitting diodes. For example, the system includes a bleeder configured to receive a rectified voltage generated by a rectifying bridge, and a dimmer detector configured to receive an input voltage generated by a voltage divider, determine whether or not the rectified voltage is associated with a TRIAC dimmer, and output a control signal to the bleeder. The voltage divider is configured to receive the rectified voltage, and the input voltage indicates a magnitude of the rectified voltage.
Claims18
A system for controlling one or more light emitting diodes, the system comprising:
- a dimmer detector configured to:
- determine that a rectified voltage is associated with a TRIAC dimmer if a first time duration for the rectified voltage to increase from a first voltage to a second voltage is smaller than a first predetermined duration or a second time duration for the rectified voltage to decrease from the second voltage to the first voltage is smaller than a second predetermined duration;
- generate a control signal to turn on a bleeder if the rectified voltage is determined to be associated with a TRIAC dimmer so that the bleeder generates a current, the current being larger than zero in magnitude;
- and
- generate the control signal to turn off the bleeder if the rectified voltage is determined not to be associated with any TRIAC dimmer so that the bleeder does not generate the current.
A method for controlling one or more light emitting diodes, the method comprising:
- determining that a rectified voltage is associated with a TRIAC dimmer if a first time duration for the rectified voltage to increase from a first voltage to a second voltage is smaller than a first predetermined duration or a second time duration for the rectified voltage to decrease from the second voltage to the first voltage is smaller than a second predetermined duration;
- generating a control signal to turn on a bleeder if the rectified voltage is determined to be associated with a TRIAC dimmer so that the bleeder generates a current, the current being larger than zero in magnitude;
- and
- generating the control signal to turn off the bleeder if the rectified voltage is determined not to be associated with any TRIAC dimmer so that the bleeder does not generate the current.
A system for controlling one or more light emitting diodes, the system comprising:
- a dimmer detector configured to:
- determine that a rectified voltage is associated with a TRIAC dimmer if a first time duration for an absolute value of a voltage to increase from a first voltage to a second voltage is smaller than a first predetermined duration or a second time duration for the absolute value of the voltage to decrease from the second voltage to the first voltage is smaller than a second predetermined duration;
- generate a control signal to turn on a bleeder if the rectified voltage is determined to be associated with a TRIAC dimmer so that the bleeder generates a current, the current being larger than zero in magnitude;
- and
- generate the control signal to turn off the bleeder if the rectified voltage is determined not to be associated with any TRIAC dimmer so that the bleeder does not generate the current.
A method for controlling one or more light emitting diodes, the method comprising:
- determining that a rectified voltage is associated with a TRIAC dimmer if a first time duration for an absolute value of a voltage to increase from a first voltage to a second voltage is smaller than a first predetermined duration or a second time duration for the absolute value of the voltage to decrease from the second voltage to the first voltage is smaller than a second predetermined duration;
- generating a control signal to turn on a bleeder if the rectified voltage is determined to be associated with a TRIAC dimmer so that the bleeder generates a current, the current being larger than zero in magnitude;
- and
- generating the control signal to turn off the bleeder if the rectified voltage is determined not to be associated with any TRIAC dimmer so that the bleeder does not generate the current.
Dependencies are inferred from the claim text.