Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.

Accelink Technologies Co., Ltd.

Wuhan China Star Optoelectronics Technology Co., Ltd.

Wuhan Tianma Micro-electronics Co., Ltd

Wuhan Telecommunication Devices Company

Empire Technology Development LLC

Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

Di Zhang

Yanfeng Fu

Xuesheng Tang

Shenglei Hu

Qianggao Hu

Weidong Ma

Kun Qian

Yi Tang

Liping Sun

Yongan Fu

Chenggang Liu

Yong Luo

Shiyu Li

Xianghong Yu

Baiquan Hu

Xuerui Liang

Yizong Chen

Ben Chen

Dongxu Xiang

Bo Liu

Guang Li

Jun Li

Jianhong Lin

Shou-Cheng Wang

Chao Luo

Di Li

Mengyang Li

Display panel and display device are provided. The display panel includes a base substrate; a plurality of pixel circuits, on a side of the base substrate; and light-emitting elements electrically connected to the plurality of pixel circuits. A pixel circuit of the plurality of pixel circuits includes a driving transistor; a first transistor, connected in series between the driving transistor and the data line, transmitting a data signal to the driving transistor in response to a first scanning signal; a second transistor, electrically connected between the driving transistor and a light-emitting element of the light-emitting elements, and transmitting a driving current to the light-emitting element of the light-emitting elements in response to a light-emitting control signal; a first capacitor; and the first node, on a side of the second plate of the first capacitor away from the base substrate.

Display panel with improving flickering problem in low frequency mode, and display device

The present disclosure discloses a display panel, a driving circuit and a display device. The display panel includes a pixel circuit and a light-emitting element. A data writing cycle of the pixel circuit includes a data writing phase and m holding phases. In the data writing phase, the first scan signal includes at least one first valid pulse. A light emission control signal includes one second valid pulse in the data writing phase and in each holding phase. The working modes of the display panel includes a first mode. In the first mode, the interval between the start time of the first valid pulse in the (i+1)-th data writing cycle and the end time of the last second valid pulse in the i-th data writing cycle is t, and in the data writing phase, the duration of the light emission control signal being an invalid pulse is t, and m and i are integers.

Display panel, driving circuit and display device for ameliorating color cast phenomenon

This application discloses a display panel including pixel circuits and light-emitting elements, wherein a first pixel circuit includes a first reset module that is connected to a first light-emitting element and provides a first reset signal to the first light-emitting element under a condition that the first reset module is turned on; a second pixel circuit includes a second reset module that is connected to a second light-emitting element and provides a second reset signal to the second light-emitting element under a condition that the second reset module is turned on; a data writing period of the pixel circuits includes a data writing phase and one or more holding phases; at least one holding phase includes a first reset sub-phase in which the first and second reset modules are turned on, voltages of the first and second reset signals are Vrefand Vrefrespectively, and Vref≠Vref

Display panel, drive circuit and display device

The present application discloses an OLED display panel, including a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels, wherein the first-color subpixels, the second-color subpixels, and the third-color subpixels constitute a plurality of repeating units, the repeating units include a first repeating unit and a second repeating unit, and the first repeating unit and the second repeating unit are arranged at intervals in any row or any column.

OLED display panel and OLED display device

A coupling structure includes a single mode active device and a planar optical waveguide. Specifically, the planar optical waveguide includes a silica waveguide for transmitting an optical signal, where the silica waveguide includes a coupling section and a conduction section; the coupling section is of a regular trapezoidal structure or an inverted trapezoidal structure, where a surface of the coupling section coupled to the single mode active device is a trapezoid top, and a surface of the coupling section connected with the conduction section is a trapezoid bottom; and a coupling gap is preset between the single mode active device and the planar optical waveguide.

Planar optical waveguide structure, and coupling structure thereof and coupling method thereof

A gate on array (GOA) circuit and a built-in touch display panel are provided. The GOA circuit collects a scan signal from a GOA unit, detects whether the scan signal from the GOA unit is abnormal in order to identify an abnormal GOA unit, and then restores a scan signal from the abnormal GOA unit.

Gate on array circuit and built-in touch display panel

The present disclosure provides a gate on array (GOA) detection circuit and a detection method. The GOA detection circuit includes a GOA circuit module and a detection signal collection module. The GOA circuit module includes a plurality of scanning lines, a GOA circuit, a plurality of common control thin film transistors (TFT), and a plurality of single-stage control TFTs. An output end of each scanning line is connected to a signal collection line. A gate of each common control TFT is connected to a detection signal control wire of the detection signal collection module, and a source of each common control TFT is connected to the signal collection line. A test point for detecting an electrical signal is disposed on the signal collection line.

GOA detection circuit and testing method therefor

Provided is an organic light emitting diode panel. The organic light emitting diode panel includes a thin film transistor substrate, a first anode layer disposed on the thin film transistor substrate and a second anode layer and a pixel definition layer disposed on the first anode layer, wherein the pixel definition layer comprises a first pixel definition layer disposed between the first anode layer and the second anode layer. By disposing the first anode layer and the second anode layer, as the organic light emitting diode panel displays, the reflection of the light emitted from the organic light emitting diode functional layer inside the organic light emitting diode panel is greatly enhanced, to enhance the brightness and viewing angle of the organic light emitting diode panel, to reduce the power consumption, and to improve the product quality.

Organic light emitting diode panel

The present invention provides a pixel driving circuit, a display apparatus and a terminal. The pixel driving circuit includes: a light-emitting device, an enabling unit, a first transistor and a second transistor. When the light-emitting device illuminates, saturated current passing through the light-emitting device is relevant to the power voltage and the grayscale data voltage. Through embodiment of the present invention, saturated current passing through the driving transistor is relevant to the power voltage and the grayscale data voltage. Furthermore, both the power voltage and the grayscale data voltage are fixed values, that is, current passing through the light-emitting device is guaranteed to the constant. Therefore, current passing through the light-emitting device is no longer affected by the threshold voltage of the driving transistor and non-uniform pixel color could be avoided, accordingly, image uniformity of display with light-emitting device (e.g., OLED) raises, and so does display quality.

Pixel driving circuit, display apparatus and terminal

The present invention provides a wavelength division multiplexing/demultiplexing optical transceiving assembly based on a diffraction grating, which is an uplink optical emitting unit and a downlink optical receiving unit that comprise a laser chip array, a light receiving detector array, a first fast axis collimating lens, a second fast axis collimating lens, a first slow axis collimating lens, a diffraction grating, a slow axis focusing lens, a second slow axis collimating lens, an optical isolator, a coupling output lens, a coupling input lens, a coupling outputting optical fiber and a coupling inputting optical fiber. The wavelength division multiplexing/demultiplexing optical transceiving assembly solves the technical problem of sharing a diffraction grating to realize a wavelength division multiplexing/demultiplexing function, achieves the beneficial effects of better diffraction grating filtering property, smaller light path coupling loss and insertion loss correlative with wavelength, larger independent optical element sizes, and simpler assembly process, and is more suitable for manufacturing a multi-channel wavelength division multiplexing/demultiplexing optical transceiving assembly.

Wavelength division multiplexing/demultiplexing optical transceiving assembly based on diffraction grating

An arrayed waveguide grating based hybrid integrated laser has an adjustable external cavity. The waveguide includes a semiconductor gain die and an optical waveguide chip. The optical waveguide chip includes an arrayed waveguide grating and an arrayed waveguide reflection-controllable component. A resonant cavity is formed by the output end reflection-controllable arrayed waveguide grating chip and the semiconductor gain die. An output wavelength of the laser can be adjusted by changing a driving condition of the reflection-controllable component. The output wavelength is determined by a center wavelength of each channel of the arrayed waveguide grating.

Arrayed waveguide grating based hybrid integrated laser having adjustable external cavity

A pixel circuit is disclosed, including an electroluminescent element, first, second, third, fourth and fifth switching tubes, first and second capacitors. The first switching tube has first end connected to second end of fourth switching tube, second end connected to first end of electroluminescent element, first control end connected to second end of second switching tube; the second switching tube has first end inputting first timing signal, control end inputting second timing signal; the first capacitor has first end connected to first control end of first switching tube; the third switching tube has second end connected to second control end of first switching tube, control end inputting third timing signal; the second capacitor has first end connected to second control end of first switching tube, second end connected to first end of electroluminescent element; the fourth switching tube has control end inputting fourth timing signal.

Pixel circuit, control method thereof, and display panel

A wavelength-tunable external cavity laser comprises a semiconductor optical amplifier chip and a laser external cavity, the laser external cavity comprising a grid filter, a phase adjustor and a silicon-based micro-ring chip, the grid filter and the silicon-based micro-ring chip constituting a wavelength-tunable optical filter which implements wavelength tuning by spectral tuning of the grid filter and/or the silicon-based micro-ring chip. A micro-ring filter in the silicon-based micro-ring chip of the tunable external-cavity laser is manufactured by adopting a mature silicon light technology, which can greatly reduce a manufacturing difficulty of the adjustable filter, and reduce the manufacturing cost of a device. An existing external-cavity adjustable technology platform may be used for smooth transition, so as to improve the degree of integration of this type of device and simplify a preparation process.

Wavelength-tunable external-cavity laser and adjustable light emission module

The present invention provides a pixel drive circuit, wherein the pixel drive circuit comprises a plurality of cascading pixel drive units, and each pixel drive units comprising: a first resetting circuit is connected to a first pixel for receiving an input voltage and resetting the first pixel; a second resetting circuit is connected to a second pixel for receiving an input voltage and resetting the second pixel; a first controlling circuit is connected to the first and the second resetting circuits for receiving a reference voltage and supplying the reference voltage to the first and second resetting circuits; and a second controlling circuit is connected to the first and the second resetting circuits for receiving data voltages and supplying the data voltages to the first and the second resetting circuits to drive the first and the second pixels simultaneously.

Growing community of inventors

Wuhan, China

Di Zhang