Hkc Corporation Limited

Zhaoyang Lu

Rongrong Li

Byung Hoon Kim

Haoxuan Zheng

Sahng Ik Jun

A light emitting device includes: a first light emitting unit and a second light emitting unit arranged beneath the first light emitting unit. The first light emitting unit and the second light emitting unit are alternately conducted. The first light emitting unit includes: a first cathode, a first electron transport layer, a first luminescent layer, a first hole transport layer, and a first anode arranged sequentially from bottom to top. The second light emitting unit includes: a second anode, a second hole transport layer, a second luminescent layer, a second electron transport layer, and a second cathode arranged sequentially from bottom to top. The first cathode, the first anode, the second cathode, and the second anode are all connected to AC power supplies, respectively.

Light emitting device and method for driving the same, and display panel

A pixel circuit and a pixel drive method. The pixel circuit includes at least two sub-pixel drive sub-circuits, the sub-pixel drive sub-circuits include an input component, a compensation component, a drive component, a first light-emitting control component and a first light-emitting element, the input component is configured to receive a data voltage signal and a first scan signal. The compensation component is configured to receive a second scan signal. The first light-emitting control component is configured to receive a power supply signal and a first control signal. An output of the drive component in the plurality of sub-pixel drive sub-circuits is coupled to an output of a first reset sub-circuit, and the first reset sub-circuit is configured to receive an initial voltage signal and a third scan signal.

Pixel circuit having a reset sub-circuit for resetting a plurality of sub-pixels and driving method thereof

Disclosed is a driving circuit including an input circuit, a first output circuit, a second output circuit and a pull-down circuit. Control terminals of the first output circuit and the second output circuit are connected with an output terminal of the input circuit and receive a control signal from the input circuit, and output terminals of the first output circuit and the second output circuit are connected with the pull-down circuit and receive a pull-down signal. Thus, two stages of driving signals output by one stage driving circuit is realized. As compared with the existing architecture under which the two stage driving circuit is needed to output two stages of driving signals, one input circuit and one pull-down circuit are removed. This application also discloses a four-stage driving circuit and a display panel. The number of used components is reduced, and the frame of the display product is narrowed.

Driving circuit, four-stage driving circuit and display panel

A pixel drive circuit, including a data input circuit, a switch circuit, an energy storage circuit and a light-emitting control circuit. The light-emitting control circuit has a control end connected to the data input circuit, an input connected to a first power supply, and an output connected to an anode of a light-emitting device. A cathode of the light-emitting device is connected to a second power supply. The first power supply outputs a low-potential voltage in a reset phase, and outputs a first high-potential voltage in a compensation phase, a writing phase and a light-emitting phase. The second power supply outputs a second high-potential voltage in the reset, compensation and writing phases, and output a low-potential voltage in the light-emitting phase. The switch circuit is switched on in the reset, compensation and light-emitting phases, and is switched off in the writing phase.

Pixel drive circuit and display panel

Disclosed are a driving circuit, a multi-stage driving circuit and a display panel. The driving circuit includes an input circuit, a pull-down circuit and an output circuit. The output circuit includes at least two sub-output circuits, the control terminals of the two adjacent sub-output circuits are connected through at least one isolation switch. Each sub-output circuit receives a control signal and a corresponding input signal output by the input circuit and outputs a corresponding output signal. An output terminal of each sub-output circuit is connected with the pull-down circuit and receives a pull-down signal. By arranging the isolating switch between the adjacent sub-output circuits, the mutual influence between the sub-output circuits is reduced, the problem that the output signal is abnormal is solved, the output signal is more stable on the basis of narrowing the frame of a display, and the competitiveness of the display is improved.

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Shenzhen, China

Zhaoyang Lu