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US 2024/0185791 A1Published application
Display panel and display device
AssigneeWuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorsWenlong PENG, Tao CHEN
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Abstract
A display panel and a display device are disclosed. By setting numbers of effective pulses of first start signals in both a writing frame and a holding frame of one display period to be plural, a plurality of first strobe driving circuits connected in cascade are allowed to output a plurality of first strobe signals multiple times to adjust a bias voltage of a first transistor of a plurality of pixel driving circuits. Therefore, the display panel can display at a similar light-emitting brightness in both the writing frame and the holding frame, thereby improving a flickering problem of the display panel.
Claims20
A display panel, comprising:
- a plurality of pixel driving circuits, wherein each of the pixel driving circuits at least comprises a light-emitting device, a first transistor, a second transistor, and a third transistor;
- a gate electrode of the first transistor is electrically connected to a first node, one of a source electrode or a drain electrode of the first transistor is electrically connected to a second node, and another one of the source electrode or the drain electrode of the first transistor is electrically connected to a third node;
- and the source electrode and the drain electrode of the first transistor are connected in series with the light-emitting device between a first voltage terminal and a second voltage terminal, a source electrode and a drain electrode of the second transistor are connected in series between a corresponding data line and the second node, and a source electrode and a drain electrode of the third transistor are connected in series between the first node and the third node;
- a plurality of first strobe driving circuits connected in cascade, wherein the first strobe driving circuits are electrically connected to a gate electrode of the second transistor of the pixel driving circuits and output a plurality of first strobe signals according to first start signals;
- and
- a plurality of second strobe driving circuits connected in cascade, wherein the second strobe driving circuits are electrically connected to a gate electrode of the third transistor of the pixel driving circuits and output a plurality of second strobe signals according to second start signals;
- wherein effective pulses of the first start signals are set in a writing frame and a holding frame of one display period, an effective pulse of the second start signals is set in the writing frame of the display period, and in both the writing frame and the holding frame of the display period, numbers of the effective pulses of the first start signals are plural.
4 more elements
A display device, comprising:
- a display panel comprising a plurality of pixel driving circuits, a plurality of first strobe driving circuits connected in cascade, and a plurality of second strobe driving circuits connected in cascade;
- wherein each of the pixel driving circuits at least comprises a light-emitting device, a first transistor, a second transistor, and a third transistor;
- a gate electrode of the first transistor is electrically connected to a first node, one of a source electrode or a drain electrode of the first transistor is electrically connected to a second node, and another one of the source electrode or the drain electrode of the first transistor is electrically connected to a third node;
- the source electrode and the drain electrode of the first transistor are connected in series with the light-emitting device between a first voltage terminal and a second voltage terminal, a source electrode and a drain electrode of the second transistor are connected in series between a corresponding data line and the second node, and a source electrode and a drain electrode of the third transistor are connected in series between the first node and the third node;
- the first strobe driving circuits connected in cascade are electrically connected to a gate electrode of the second transistor of the pixel driving circuits and output a plurality of first strobe signals according to first start signals;
- and the second strobe driving circuits connected in cascade are electrically connected to a gate electrode of the third transistor of the pixel driving circuits and output a plurality of second strobe signals according to second start signals;
- and
- a timing controller electrically connected to the first strobe driving circuits and the second strobe driving circuits;
- wherein effective pulses of the first start signals are set in a writing frame and a holding frame of one display period, an effective pulse of the second start signals is set in the writing frame of the display period, and in both the writing frame and the holding frame of the display period, numbers of the effective pulses of the first start signals are plural.
6 more elements
Dependencies are inferred from the claim text.