Pixel circuit and method for driving the same, and display panel

A display panel comprising a plurality of pixel units, wherein each of the plurality of pixel units comprises:

• a substrate;
• a control circuit layer arranged on the substrate;
• an intermediate layer arranged on a side of the control circuit layer away from the substrate;
• and
• a first electrode layer, a first light-emitting layer, a second electrode layer, a second light-emitting layer, a third electrode layer, a third light-emitting layer, and a fourth electrode layer sequentially stacked on the intermediate layer, wherein the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are used as a first light-emitting element, a second light-emitting element and a third light-emitting element, respectively;
• wherein the control circuit layer comprises:
• a driving sub-circuit electrically coupled to a first node, a first power signal terminal and a second node, and configured to transmit a first power voltage at the first power signal terminal to the second node under control of a voltage at the first node;
• and
• a light-emitting control sub-circuit electrically coupled to the second node, a second power signal terminal, a first light-emitting control terminal, a second light-emitting control terminal, a third light-emitting control terminal, a first electrode of a first light-emitting element, a second electrode of the first light-emitting element, a first electrode of a second light-emitting element, a second electrode of the second light-emitting element, a first electrode of a third light-emitting element and a second electrode of the third light-emitting element, and configured to:
• transmit a voltage at the second node and a second power voltage at the second power signal terminal to the first electrode of the first light-emitting element and the second electrode of the first light-emitting element respectively in a first period, transmit a voltage at the second node and a second power voltage at the second power signal terminal to the first electrode of the second light-emitting element and the second electrode of the second light-emitting element respectively in a second period, and transmit a voltage at the second node and a second power voltage at the second power signal terminal to the first electrode of the third light-emitting element and the second electrode of the third light-emitting element respectively in a third period, under control of a first light-emitting control signal from the first light-emitting control terminal, a second light-emitting control signal from the second light-emitting control terminal, and a third light-emitting control signal from the third light-emitting control terminal;
• wherein the light-emitting control sub-circuit comprises:
• a first transistor having a control electrode electrically coupled to the second light-emitting control terminal, a first electrode electrically coupled to the second node, and a second electrode electrically coupled to a fourth node;
• a second transistor having a control electrode electrically coupled to the first light-emitting control terminal, a first electrode electrically coupled to the second node, and a second electrode electrically coupled to the first electrode of the first light-emitting element;
• a third transistor having a control electrode electrically coupled to the third light-emitting control terminal, a first electrode electrically coupled to the second node, and a second electrode electrically coupled to a fifth node;
• a fourth transistor having a control electrode electrically coupled to the first light-emitting control terminal, a first electrode electrically coupled to the fourth node, and a second electrode electrically coupled to the second power signal terminal;
• and
• a fifth transistor having a control electrode electrically coupled to the second light-emitting control terminal, a first electrode electrically coupled to the fifth node, and a second electrode electrically coupled to the second power signal terminal,
• wherein the second electrode of the first light-emitting element is electrically coupled to the first electrode of the second light-emitting element via the fourth node, the second electrode of the second light-emitting element is electrically coupled to the first electrode of the third light-emitting element via the fifth node, and the second electrode of the third light-emitting element is electrically coupled to the second power signal terminal,
• wherein each of the first period, the second period and the third period comprises an initialization phase, a charging phase and a light-emitting phase,
• wherein the first light-emitting control signal being at a second level, the second light-emitting control signal and the third light-emitting control signal each being at a first level are provided in the light-emitting phase of the first period;
• the second light-emitting control signal being at a second level, the first light-emitting control signal and the third light-emitting control signal each being at the first level are provided in the light-emitting phase of the second period;
• the third light-emitting control signal being at the second level, the first light-emitting control signal and the second light-emitting control signal each being at the first level are provided in the light-emitting phase of the third period;
• and
• the first light-emitting control signal, the second light-emitting control signal and the third light-emitting control signal each being at the first level are provided in the initialization phase and the charging phase of each of the first period, the second period and the third period.