Drive circuit and display device
AssigneeTcl China Star Optoelectronics Technology Co., Ltd.
InventorHaoran Li
Life of this patent
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Abstract
The disclosure discloses a drive circuit included a first transistor electrically connected to a first control terminal, a first voltage terminal, and a first node; an inductor electrically connected to the first node and a second voltage terminal; a first diode electrically connected to a grounding terminal and the first node; a first capacitor electrically connected to a second voltage terminal and the grounding terminal; and a discharging circuit module electrically connected to the first node and the grounding terminal to provide a discharging circuit to discharge the capacitor.
Claims16
A drive circuit, comprising:
- a first transistor comprising a gate electrically connected to a first control terminal, a drain electrically connected to a first voltage terminal, and a source electrically connected to a first node;
- an inductor comprising a first end electrically connected to the first node, and a second end electrically connected to a second voltage terminal;
- a first diode comprising an anode electrically connected to a grounding terminal and a cathode electrically connected to the first node;
- a first capacitor comprising a first end electrically connected to the second voltage terminal and a second end electrically connected to the grounding terminal;
- and
- a discharging circuit module electrically connected to the first node and the grounding terminal and configured to discharge the first capacitor,
- wherein the drive circuit is configured to operate in a first drive phase, a second drive phase, a third drive phase, and a fourth drive phase,
- in the first drive phase, current flows in the inductor in a forward direction, and the inductor is charged,
- in the second drive phase, current flows in the inductor in the forward direction, the inductor is discharged, and the first capacitor is charged,
- in the third drive phase, the inductor is not discharged, no current flows in the inductor, and the inductor is charged by the first capacitor by means of the discharging circuit module, and
- in the fourth drive phase, the inductor is charged by input voltage to the first voltage terminal.
A display device, comprising a display panel and a drive circuit, wherein the display panel is electrically connected to the drive circuit;
- and
- wherein the drive circuit comprises:
- a first transistor comprising a gate electrically connected to a first control terminal, a drain electrically connected to a first voltage terminal, and a source electrically connected to a first node;
- an inductor comprising a first end electrically connected to the first node and a second end electrically connected to a second voltage terminal;
- a first diode comprising an anode electrically connected to a grounding terminal and a cathode electrically connected to the first node;
- a first capacitor comprising a first end electrically connected to the second voltage terminal and a second end electrically connected to the grounding terminal;
- and
- a discharging circuit module electrically connected to the first node and the grounding terminal and configured to discharge the first capacitor,
- wherein the drive circuit is configured to operate in a first drive phase, a second drive phase, a third drive phase, and a fourth drive phase,
- in the first drive phase, current flows in the inductor in a forward direction, and the inductor is charged,
- in the second drive phase, current flows in the inductor in the forward direction, the inductor is discharged, and the first capacitor is charged,
- in the third drive phase, the inductor is not discharged, no current flows in the inductor, and the inductor is charged by the first capacitor by means of the discharging circuit module, and
- in the fourth drive phase, the inductor is charged by input voltage to the first voltage terminal.
Dependencies are inferred from the claim text.