Dual-output flyback voltage conversion circuit and display device
AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.
InventorWendong LI
Life of this patent
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Abstract
A dual-output flyback voltage conversion circuit is provided, including an input module, a voltage transformation module, an output module, and a feedback module. The input module is used for rectifying and filtering an input voltage. The voltage transformation module is used for performing a voltage conversion process on the input voltage which is obtained after rectifying and filtering. The output module is used for outputting a first output voltage and a second output voltage according to conversion voltages. The feedback module is used for controlling the voltage transformation module to output the input voltage which is obtained after rectifying and filtering according to the first output voltage and the second output voltage.
Claims19
A dual-output flyback voltage conversion circuit, comprising:
- an input module, for rectifying and filtering an input voltage;
- a voltage transformation module, for performing a voltage conversion process on the input voltage which is obtained after rectifying and filtering to obtain a first conversion voltage and a second conversion voltage;
- an output module, for outputting a first output voltage according to the first conversion voltage, and outputting a second output voltage according to the second conversion voltage;
- and
- a feedback module, for controlling the voltage transformation module to output the input voltage which is obtained after rectifying and filtering according to the first output voltage and the second output voltage;
- wherein the first output voltage is a main board driving voltage, and the second output voltage is a backlight driving voltage;
- wherein the voltage transformation module comprises:
- a first input winding, wherein a first terminal of the first input winding is connected with the input module, and a second terminal of the first input winding is connected with the feedback module;
- a first output winding, wherein a first terminal of the first output winding is grounded, and a second terminal of the first output winding is connected with the output module;
- and
- a second output winding, wherein a first terminal of the second output winding is connected with the second terminal of the first output winding, and a second terminal of the second output winding is connected with the output module;
- wherein the output module comprises a first output unit and a second output unit, wherein the first output unit comprises a first group of diodes and a first capacitor, an anode of the first group of diodes is connected with the second terminal of the first output winding, a cathode of the first group of diodes outputs the first output voltage, a terminal of the first capacitor is connected with the cathode of the first group of diodes, and another terminal of the first capacitor is grounded;
- and
- wherein the second output unit comprises a second group of diodes and a second capacitor, an anode of the second group of diodes is connected with the second terminal of the second output winding, a cathode of the second group of diodes outputs the second output voltage, a terminal of the second capacitor is connected with the cathode of the second group of diodes, and another terminal of the second capacitor is grounded.
A dual-output flyback voltage conversion circuit, comprising:
- an input module, for rectifying and filtering an input voltage;
- a voltage transformation module, for performing a voltage conversion process on the input voltage which is obtained after rectifying and filtering to obtain a first conversion voltage and a second conversion voltage;
- an output module, for outputting a first output voltage according to the first conversion voltage, and outputting a second output voltage according to the second conversion voltage;
- and
- a feedback module, for controlling the voltage transformation module to output the input voltage which is obtained after rectifying and filtering according to the first output voltage and the second output voltage.
A display device, comprising a dual-output flyback voltage conversion circuit, which comprises:
- an input module, for rectifying and filtering an input voltage;
- a voltage transformation module, for performing a voltage conversion process on the input voltage which is obtained after rectifying and filtering to obtain a first conversion voltage and a second conversion voltage;
- an output module, for outputting a first output voltage according to the first conversion voltage, and outputting a second output voltage according to the second conversion voltage;
- and
- a feedback module, for controlling the voltage transformation module to output the input voltage which is obtained after rectifying and filtering according to the first output voltage and the second output voltage.
Dependencies are inferred from the claim text.