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US 2017/0288536 A1Published application
Voltage controlling circuit of t-con load variation, display panel and display device
AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.
InventorDan CAO
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Abstract
The present disclosure provides a voltage controlling circuit of a T-CON load variation, a display panel and a display device. The voltage controlling circuit of the T-CON load variation includes: a power source chip and a voltage controlling circuit, and the voltage controlling circuit includes a photoelectric coupler, a first comparator, a second comparator, a first field effect transistor and a second field effect transistor. Therefore, the technical scheme of the present disclosure has an advantage that the Vcore may automatically vary with a variation of the load.
Claims10
A voltage controlling circuit of a T-CON load variation, wherein the voltage controlling circuit of the T-CON load variation comprises:
- a power source chip and a voltage controlling circuit, and the voltage controlling circuit comprises a photoelectric coupler, a first comparator, a second comparator, a first field effect transistor and a second field effect transistor;
- wherein a first pin of the photoelectric coupler is coupled to the other terminal of an inductor, one terminal of the inductor is connected to a voltage output terminal of the power source chip, a second pin of the photoelectric coupler is connected to a core voltage, a third pin of the photoelectric coupler is connected to the other terminal of a first resistor, one terminal of the first resistor is connected to a ground, and a fourth pin of the photoelectric coupler is connected to a first voltage source;
- wherein a positive power terminal of the first comparator is connected to a second voltage source, a negative power terminal of the first comparator is connected to an equivalent electric potential point, a positive input terminal of the first comparator is connected to the fourth pin of the photoelectric coupler, a negative input terminal of the first comparator is connected to a first comparing voltage, and an output terminal of the first comparator is connected to a gate of the second field effect transistor;
- a positive power terminal of the second comparator is connected to the second voltage source, a negative power terminal of the second comparator is connected to an equivalent electric potential point, a positive input terminal of the second comparator is connected to the fourth pin of the photoelectric coupler, a negative input terminal of the second comparator is connected to a second comparing voltage, and an output terminal of the second comparator is connected to a gate of the first field effect transistor;
- wherein a drain of the first field effect transistor is connected to the core voltage, a source of the first field effect transistor is connected to one terminal of a second resistor, the other terminal of the second resistor is connected to a feedback voltage terminal of the power source chip, a drain of the second field effect transistor is connected to the other terminal of a third resistor, one terminal of the third resistor is connected to the feedback voltage terminal of the power source chip, and a source of the second field effect transistor is connected to the ground.
2 more elements
A display panel, wherein the display panel comprises:
- a voltage controlling circuit of T-CON load variation and the voltage controlling circuit of the T-CON load variation comprises:
- a power source chip and a voltage controlling circuit, and the voltage controlling circuit comprises a photoelectric coupler, a first comparator, a second comparator, a first field effect transistor and a second field effect transistor;
- wherein a first pin of the photoelectric coupler is coupled to the other terminal of an inductor, one terminal of the inductor is connected to a voltage output terminal of the power source chip, a second pin of the photoelectric coupler is connected to a core voltage, a third pin of the photoelectric coupler is connected to the other terminal of a first resistor, one terminal of the first resistor is connected to a ground, and a fourth pin of the photoelectric coupler is connected to a first voltage source;
- wherein a positive power terminal of the first comparator is connected to a second voltage source, a negative power terminal of the first comparator is connected to an equivalent electric potential point, a positive input terminal of the first comparator is connected to the fourth pin of the photoelectric coupler, a negative input terminal of the first comparator is connected to a first comparing voltage, and an output terminal of the first comparator is connected to a gate of the second field effect transistor;
- a positive power terminal of the second comparator is connected to the second voltage source, a negative power terminal of the second comparator is connected to an equivalent electric potential point, a positive input terminal of the second comparator is connected to the fourth pin of the photoelectric coupler, a negative input terminal of the second comparator is connected to a second comparing voltage, and an output terminal of the second comparator is connected to a gate of the first field effect transistor;
- wherein a drain of the first field effect transistor is connected to the core voltage, a source of the first field effect transistor is connected to one terminal of a second resistor, the other terminal of the second resistor is connected to a feedback voltage terminal of the power source chip, a drain of the second field effect transistor is connected to the other terminal of a third resistor, one terminal of the third resistor is connected to the feedback voltage terminal of the power source chip, and a source of the second field effect transistor is connected to the ground.
3 more elements
(canceled)
Dependencies are inferred from the claim text.