Display panel including short circuit protection circuit
The present disclosure provides a display panel. The display panel includes a short circuit protection circuit, a pixel driving circuit, and an organic light-emitting element. The short circuit protection circuit includes a detection circuit electrically connected to the organic light-emitting element, and a control circuit electrically connected to the detection circuit and the pixel driving circuit. The detection circuit is configured to detect whether the organic light-emitting element is short-circuited. The control circuit is configured to control, in response to a detection result of the detection circuit, whether the pixel driving circuit performs driving. In the present disclosure, the display panel includes a plurality of pixel units arranged in rows and columns. This prevents the pixel driving circuit from burning the organic light-emitting element that is short-circuited or other adjacent organic light-emitting element.
1. A display panel, comprising:
a short circuit protection circuit;
a pixel driving circuit; and
an organic light-emitting element,
wherein the short circuit protection circuit comprises a detection circuit electrically connected to the organic light-emitting element, and a control circuit electrically connected to the detection circuit and the pixel driving circuit,
the detection circuit is configured to detect whether the organic light-emitting element is short-circuited, and
the control circuit is configured to control, in response to a detection result of the detection circuit, whether the pixel driving circuit performs driving;
wherein the detection circuit comprises a first transistor having a control electrode electrically connected to a reference signal, a first electrode electrically connected to the organic light-emitting element, and a second electrode electrically connected to the control circuit;
wherein the control circuit comprises a first control unit, and the first control unit comprises a second transistor having a first electrode electrically connected to the pixel driving circuit and a second electrode electrically connected to the organic light-emitting element; and
wherein the control circuit further comprises a second control unit, and the second control unit comprises a third transistor, a fourth transistor, a fifth transistor, a first capacitor, a first node, and a second node,
the third transistor has a control electrode electrically connected to the first node, a first electrode electrically connected to the second node, and a second electrode electrically connected to a light-emitting signal,
the fourth transistor has a control electrode electrically connected to a scan signal, a first electrode electrically connected to the first transistor, and a second electrode electrically connected to the first node,
the fifth transistor has a control electrode electrically connected to the scan signal, a first electrode electrically connected to the first node, and a second electrode electrically connected to a high-potential signal, and
the first capacitor has a first electrode electrically connected to the second node, and a second electrode electrically connected to the first node.
2. The display panel according to claim 1 , wherein the organic light-emitting element comprises a first electrode electrically connected to the first transistor, and a second electrode electrically connected to a second power supply signal, and
a potential of the reference signal is greater than a sum of a potential of the second power supply signal and a threshold voltage of the first transistor, and smaller than a sum of the potential of the second power supply signal and a threshold voltage of the organic light-emitting element.
3. The display panel according to claim 2 , wherein the first transistor, the second transistor, the third transistor, and the fourth transistor are all N-type transistors; and the fifth transistor is a P-type transistor.
4. The display panel according to claim 3 , wherein the pixel driving circuit comprises a driving transistor, a switching transistor, a bootstrap capacitor, and a third node,
the driving transistor has a control electrode electrically connected to the third node, a first electrode electrically connected to the first power supply signal, and a second electrode electrically connected to the second transistor,
the switching transistor has a control electrode electrically connected to the scan signal, a first electrode electrically connected to a data signal, and a second electrode electrically connected to the third node,
the bootstrap capacitor has a first electrode electrically connected to the first power supply signal, and a second electrode electrically connected to the third node,
the first electrode of the organic light-emitting element is further electrically connected to the second transistor, and
the driving transistor and the switching transistor are both P-type transistors.
5. The display panel according to claim 3 , wherein the pixel driving circuit comprises a driving transistor, a switching transistor, a bootstrap capacitor, and a third node,
the driving transistor has a control electrode electrically connected to the third node, a first electrode electrically connected to the second transistor, and a second electrode electrically connected to the organic light-emitting element,
the switching transistor has a control electrode electrically connected to the scan signal, a first electrode electrically connected to a data signal, and a second electrode electrically connected to the third node,
the bootstrap capacitor has a first electrode electrically connected to the second transistor, and a second electrode electrically connected to the third node, and
the driving transistor and the switching transistor are both P-type transistors.
6. A display panel, comprising:
a short circuit protection circuit;
a pixel driving circuit; and
an organic light-emitting element,
wherein the short circuit protection circuit comprises a detection circuit electrically connected to the organic light-emitting element, and a control circuit electrically connected to the detection circuit and the pixel driving circuit,
the detection circuit is configured to detect whether the organic light-emitting element is short-circuited, and
the control circuit is configured to control, in response to a detection result of the detection circuit, whether the pixel driving circuit performs driving;
wherein the detection circuit comprises a first transistor having a control electrode electrically connected to a reference signal, a first electrode electrically connected to the organic light-emitting element, and a second electrode electrically connected to the control circuit; and
wherein the control circuit comprises a first control unit, and the first control unit comprises a second transistor having a first electrode electrically connected to a first power supply signal and a second electrode electrically connected to the pixel driving circuit;
wherein the control circuit further comprises a second control unit, and the second control unit comprises a third transistor, a fourth transistor, a fifth transistor, a first capacitor, a first node, and a second node,
the third transistor has a control electrode electrically connected to the first node, a first electrode electrically connected to the second node, and a second electrode electrically connected to a light-emitting signal,
the fourth transistor has a control electrode electrically connected to a scan signal, a first electrode electrically connected to the first transistor, and a second electrode electrically connected to the first node,
the fifth transistor has a control electrode electrically connected to the scan signal, a first electrode electrically connected to the first node, and a second electrode electrically connected to a high-potential signal, and
the first capacitor has a first electrode electrically connected to the second node, and a second electrode electrically connected to the first node.
7. The display panel according to claim 6 , wherein the organic light-emitting element comprises a first electrode electrically connected to the first transistor, and a second electrode electrically connected to a second power supply signal, and
a potential of the reference signal is greater than a sum of a potential of the second power supply signal and a threshold voltage of the first transistor, and smaller than a sum of the potential of the second power supply signal and a threshold voltage of the organic light-emitting element.
8. The display panel according to claim 7 , wherein the first transistor, the second transistor, the third transistor, and the fourth transistor are all N-type transistors; and the fifth transistor is a P-type transistor.
9. The display panel according to claim 8 , wherein the pixel driving circuit comprises a driving transistor, a switching transistor, a bootstrap capacitor, and a third node,
the driving transistor has a control electrode electrically connected to the third node, a first electrode electrically connected to the first power supply signal, and a second electrode electrically connected to the second transistor,
the switching transistor has a control electrode electrically connected to the scan signal, a first electrode electrically connected to a data signal, and a second electrode electrically connected to the third node,
the bootstrap capacitor has a first electrode electrically connected to the first power supply signal, and a second electrode electrically connected to the third node,
the first electrode of the organic light-emitting element is further electrically connected to the second transistor, and
the driving transistor and the switching transistor are both P-type transistors.
10. The display panel according to claim 8 , wherein the pixel driving circuit comprises a driving transistor, a switching transistor, a bootstrap capacitor, and a third node,
the driving transistor has a control electrode electrically connected to the third node, a first electrode electrically connected to the second transistor, and a second electrode electrically connected to the organic light-emitting element,
the switching transistor has a control electrode electrically connected to the scan signal, a first electrode electrically connected to a data signal, and a second electrode electrically connected to the third node,
the bootstrap capacitor has a first electrode electrically connected to the second transistor, and a second electrode electrically connected to the third node, and
the driving transistor and the switching transistor are both P-type transistors.