Control circuit

Patent metadata

Field	Value
Publication number	US-9930740-B1
Application number	US-201715681507-A
Country	US
Kind code	B1
Filing date	Aug 21, 2017
Priority date	Jul 18, 2017
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A control circuit of the present disclosure can directly coupled with AC power grid to control and adjust an LED lamp. The control circuit includes a protection unit, an anti-interference unit, an adjusting unit, an auxiliary control unit, a light emitting module, a low-flicker control unit, an ESD protection unit, an output unit and a plurality of IC unit. the adjusting unit adjusts and control a luminance of the light emitting module, the auxiliary control unit assistants to adjust the luminance of the light emitting module and increase a compatibility between the adjusting unit and the IC unit.

First claim

What is claimed is:

1. A control circuit, coupled with AC power grid by a first end and a second end and drive LED lamp emitting light, the control circuit comprising:
a protection unit;
a light emitting module;
a low-flicker control unit;
an ESD protection unit;
an output unit and a plurality of IC unit;
wherein the control circuit further comprises a adjusting unit and a auxiliary control unit coupled with the adjusting unit, the adjusting unit couples with the protection unit and the IC unit, the auxiliary control unit couples with the protection unit and the IC unit, the adjusting unit adjusts and control a luminance of the light emitting module, the auxiliary control unit assists to adjust the luminance of the light emitting module and increase a compatibility between the adjusting unit and the IC unit.

2. The control unit of claim 1 , wherein the protection unit is used to prevent a surge from an AC power grid to stabilize a voltage and current of the control circuit, the protection comprises a first protection unit and a second protection unit.

3. The control unit of claim 2 , wherein a performance of the first protection unit for preventing the surge is better than a performance of the second protection for preventing the surge, a response speed of the first protection unit for the surge is more slowly than a response speed of the second protection unit for the surge.

4. The control circuit of claim 2 , wherein the anti-interference unit prevents interference from electromagnetic waves and electromagnetic radiation from the AC power grid, the anti-interference unit comprises a first anti-interference and a second anti-interference coupled with the first anti-interference through a connecting unit.

5. The control circuit of claim 4 , wherein the first anti-interference comprises a first resistor and a second resistor connected parallelly with the first resistor, the second anti-interference connects parallelly with the second protection, the second anti-interference comprises a third resistor and a first capacitor connected in series with the third resistor.

6. The control circuit of claim 1 , wherein the adjusting unit comprises a fourth resistor, a fifth resistor connected in series with the fourth resistor, a second capacitor connected parallelly with the fifth resistor, the auxiliary control comprises a sixth resistor, a seventh resistor connected parallelly with the sixth resistor.

7. The control circuit of claim 1 , wherein the light emitting module comprises a first light source and a second light source and a first backward diode 150 , the first light source and the second light source respectively comprise a plurality of LEDs.

8. The control circuit of claim 7 , wherein the low-flicker control unit connects parallelly with the light emitting module, the low-flicker control unit comprises a third capacitor, a fourth capacitor, an eighth resistor and a ninth resistor, the eighth resistor connects parallelly with the third capacitor, the ninth resistor connects parallelly with the fourth capacitor, the eighth resistor and the third capacitor connects parallelly with the first light source, the fourth capacitor and the ninth resistor connects parallelly with the second light source.

9. The control circuit of claim 1 , wherein ESD protection unit prevents the static electricity from the IC unit, the ESD protection unit comprises a first ESD protection unit and a second ESD protection unit, the first ESD protection unit comprises a tenth resistor, the second ESD protection unit comprises a eleventh resistor.

10. The control circuit of claim 7 , wherein an output current of the output unit is equal to a sum of an output current of the first light source and an output current of the second light source.

11. The control circuit of claim 1 , wherein output unit comprises a twelfth resistor and a thirteenth resistor connected in series with the twelfth resistor.

12. The control circuit of claim 1 , wherein further comprises a first audion and a second audion, the first audion and the second audion couples with the light emitting module, the low-flicker control unit, the ESD protection unit, the output unit and the IC unit.

Assignees

• Champ Tech Optical Foshan Corp

Inventors

• Hung Chin-Che

Classifications

• H05B45/50 Primary

  responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits · CPC title

• H05B45/44

  with an active control inside an LED matrix · CPC title

• H05B45/59

  for reducing or suppressing flicker or glow effects · CPC title

• H05B33/0833 Primary

  Electricity · mapped topic

• H05B33/0881

  Electricity · mapped topic