Pixel driving circuit and display panel
AssigneeWuhan China Star Optoelectronics Technology Co., Ltd.
InventorZhou Zhou
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Abstract
The present disclosure provides a pixel driving circuit and a display panel. An inversion control unit controls a potential of a second node to be a voltage corresponding to a first voltage signal or a second voltage signal based on a first scanning signal and a light-emitting control signal, so that a pulse width control unit improves the control speed of the signal transmission state between a first power supply terminal and the first node based on the potential of the second node, and a pulse amplitude modulation module improves the control speed of the light-emitting state of a light-emitting device based on a potential of the first node.
Claims15
A pixel driving circuit, comprising:
- a light-emitting device;
- a pulse amplitude modulation module electrically connected to the light-emitting device and a first node and configured to control a light-emitting state of the light-emitting device based on a potential of the first node;
- a pulse width modulation module comprising an inversion control unit electrically connected to a second node and a pulse width control unit electrically connected between the first node and the second node, wherein the inversion control unit is configured to control one of a first voltage signal and a second voltage signal to be transmitted to the second node based on a first scanning signal and a light-emitting control signal, and the pulse width control unit is configured to control a signal transmission between a first power supply terminal and the first node based on a potential of the second node.
A display panel comprising a plurality of sub-pixels, at least one of the sub-pixels comprising a pixel driving circuit, wherein the pixel driving circuit comprises:
- a light-emitting device;
- a pulse amplitude modulation module electrically connected to the light-emitting device and a first node and configured to control a light-emitting state of the light-emitting device based on a potential of the first node;
- a pulse width modulation module comprising an inversion control unit electrically connected to a second node and a pulse width control unit electrically connected between the first node and the second node, wherein the inversion control unit is configured to control one of a first voltage signal and a second voltage signal to be transmitted to the second node based on a first scanning signal and a light-emitting control signal, and the pulse width control unit is configured to control a signal transmission between a first power supply terminal and the first node based on a potential of the second node.
Dependencies are inferred from the claim text.