Abb Schweiz Ag

Chengdu Boe Optoelectronics Technology Co., Ltd.

Boe Technology Group Co., Ltd.

Other

Beijing Boe Technology Development Co., Ltd.

Hitachi Energy Switzerland Ag

Jiangxi University of Science and Technology

Hitachi Energy Ltd

Xing Huang

HaiLian Xie

Yao Liang Chen

XiaoBo Yang

ChunMing Yuan

Kai Liu

Yanping Ren

Bin Liu

Min Li

Yuhsiung Feng

Changlong Yuan

Xin Mou

RongRong Yu

Hongting Lu

Hector Zelaya De La Parra

Lian Xiang

Hang Dong

Quansheng Liu

Xingyu Chen

He Liu

Xiang Xue

Liang Yang

Linsheng Wan

Shaohua Wang

Tao Huang

Junjie Ge

Peng Liu

Hailong Wang

Shuilong Wang

Hua Wei

Guangming Pei

Xueying He

Rongrong Yu

Yao Chen

Qingping Wang

Beverage container cover

A display panel and a display device. The display panel comprises: a substrate, a display area () provided with at least one light-emitting signal line (E), at least one first reset signal line (R) and sub-pixels arranged in an array, at least one sub-pixel (P, P, P) comprising: a light-emitting device (L) and a pixel circuit. The first reset signal line (R) is configured to provide a reset control signal for the pixel circuit, the light-emitting signal line is configured to provide a light-emitting control signal for the pixel circuit to provide a driving current. For the first reset signal line and the light-emitting signal line E connected to a same pixel circuit, the duration in which the signal of the light-emitting signal line is an invalid level signal is equal to the duration in which the signal of the first reset signal line is a valid level signal.

Display panel and display device

Embodiments of present disclosure relate to an apparatus and a method for controlling a delta-connected cascaded multilevel converter. The apparatus () for controlling a delta-connected cascaded multilevel converter () comprises: a converter controller () configured to: receive current signals indicating phase currents flowing through respective phase arms of the converter (); determine a harmonic current signal indicating a circulating current of the converter () from the current signals; and generate, based on the determined harmonic current signal and a reference current signal, a harmonic voltage signal to cause an amplitude of the circulating current flowing through the phase arms of the converter () to be a predetermined amplitude.

Apparatus and method for controlling delta-connected cascaded multilevel converter

Embodiments of a modular direct current interconnection device (MDCID) include at least three operation branches, at least one transient branch, and a local controller. Each of the operation branches includes a first terminal coupled to a common node and configured to transmit DC current in a normal mode. The transient branch is coupled between second terminals of different ones of the at least three operation branches and configured to provide a transient DC current path in a fault clearance mode. The local controller is coupled to the operation branches and the transient branch, and the local controller is configured to control operation of the operation branches and the transient branch.

Modularized DC interconnection device and system thereof

A light-emitting panel has a light-emitting region and a non-light-emitting region, and at least one portion of a boundary of the light-emitting region is zigzag-shaped. The light-emitting panel includes: a base substrate, sub-pixels disposed in the light-emitting region on the base substrate: a first encapsulation layer disposed on a side of the plurality of sub-pixels away from the base substrate, and at least one first barrier wall disposed on the first encapsulation layer. Orthogonal projections of the sub-pixels on the base substrate are within an orthogonal projection of the first encapsulation layer on the base substrate. The first barrier wall is located in the non-light-emitting region, and is disposed at a side of the at least one zigzag-shaped portion of the boundary of the light-emitting region proximate to the non-light-emitting region. A refractive index of the first barrier wall is greater than a refractive index of the first encapsulation layer.

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

A power converter includes a power conversion circuit having a first terminal set and a second terminal set, configured to convert power input via one of the first terminal set and the second terminal set and output the converted power via the other of the first terminal set and the second terminal set; a measurement unit; a controller configured to control the power conversion circuit to generate a voltage/current waveform travelling along the first network with a power supplied by a second power source linked to the second terminal set of the power conversion circuit in response to a condition that a change rate of the measurement of the voltage/current exceeds a threshold; and locate a fault on the first network. The power conversion circuit can be re-used for different modes of operation either for power transmission under normal condition or for fault location under fault condition.

Power converter and control method therefor

An OLED display panel, a manufacturing method thereof and a display apparatus are provided. The display panel includes a substrate, a light emitting structure layer and a viewing angle improving layer which are arranged on the substrate. The light emitting structure layer is configured to emit light to the viewing angle improving layer. The viewing angle improving layer is disposed on one side of the light emitting structure layer away from the substrate and is configured to adjust the viewing angle of the display panel to allow the viewing angle of the display panel along a first direction to satisfy a first viewing angle range, and allow the viewing angle along a second direction to satisfy a second viewing angle range. The first direction is perpendicular to the second direction.

OLED display panel, manufacturing method thereof and display apparatus

The present invention discloses a method for decomposing medium-/low-grade scheelite, specifically comprising steps of: grinding medium-/low-grade scheelite, decomposing in an autoclave by using sodium phosphate and activated magnesium fluoride as leaching agents, and treating by solid-liquid separation to obtain crude sodium tungstate solution and residue. In this way, the medium-/low-grade scheelite is decomposed. Magnesium chloride is added in a sodium fluoride solution to prepare activated magnesium fluoride as a leaching agent. The present invention has the advantage that the high-efficiency decomposition of medium-/low-grade scheelite can be realized with low consumption of leaching agents, and the leaching cost can be greatly reduced in comparison to the existing decomposition processes using sodium hydroxide and sodium carbonate. This process is short in route, simple in operation, readily available and reliable in production equipment, and easy for industrialization.

Method for decomposing medium-/low-grade scheelite

Provided is a method and an apparatus for real-time monitoring interaction between surrounding rocks and the TBM in a TBM tunneling process. Interaction between target objects is monitored by one or more sensors to obtain test data. A first electronic device connects a collecting module with the one or more sensors through a communication serial interface of the one or more sensors. A connection state between the one or more sensors and the collecting module is judged. The connection abnormality information is recorded or the collection parameters according to the connection state are set. The first electronic device judges the collection state by monitoring the collection, and records collection abnormality information or performs one-time collection of data according to the collection state. The first electronic device stores the data in a first storage folder. A second electronic device analyzes the data, and transmits the data to a monitoring device.

Method and apparatus for monitoring the interaction between surrounding rocks and TBM in TBM tunneling process

Embodiments of present disclosure relates to a modular interconnection device (MID) and an electrical network system. The MID comprises a modular port assembly, a node, a converter and a local controller. The modular port assembly is configured to transmit alternating current and/or direct current. The node is coupled to an AC source via a first switch and the modular port assembly. The first switch is configured to selectively disconnect the modular interconnection device from the AC source. The converter is coupled to the node via a second switch and coupled to a DC source via a third switch. The converter is configured to convert the AC current into DC current or convert DC current into AC current. The local controller is coupled to the first, second and third switches and configured to control operation of the first, second and third switches.

Modularized interconnection device and system thereof

The present disclosure provides a pixel unit and a method for manufacturing the same, and a double-sided OLED display device. The pixel unit includes: a substrate; a driving circuit layer including a first and a second driving transistor on one side of the substrate; a first light emitting device including a first anode on one side of the driving circuit layer away from the substrate and connected to a drain of the first driving transistor, a first functional layer on one side of the first anode away from the driving circuit layer, and a cathode on one side of the first functional layer away from the first anode; a second light emitting device including the cathode, a second functional layer, and a second anode on one side of the second functional layer away from the cathode and connected to a drain of the second driving transistor.

Pixel unit and method for manufacturing the same, and double-sided OLED display device

A control system and photovoltaic system and micro-grid using the same and method thereof. The control system for controlling a photovoltaic converter includes: a first input, for receiving first signals indicating first sampling values of an input current of the photovoltaic converter provided by a solar panel; a second input, for receiving second signals indicating second sampling values of an input voltage of the photovoltaic converter provided by the solar panel; a third input, for receiving third signals indicating third sampling values of an output voltage of the photovoltaic converter; and a controller, for first regulating the output voltage of the photovoltaic converter in a direction towards a reference voltage based on the third sampling value by regulating the input voltage by first voltage change of a first predetermined level; wherein: the controller is further adapted for monitoring a trend of the input voltage and power provided by the solar panel based on the first sampling values and the second sampling values for the previous sampling time points and the current sampling time point, and suspending the first regulation in case that the trend changes. This allows for an improvement of transient response of the control system and preventing possible overshooting of a lower input voltage even when the solar panel operating point is relatively far away from the MPP.

Control system and photovoltaic system and micro-grid using the same and method thereof

A method and a control system using the same for coordinating control of a plurality of wind turbines of a wind farm during a fault in a utility grid to which power is to be delivered via at least one cable of the wind farm. The method includes: opening each of the electrical connections; selecting at least one wind turbine of the plurality of wind turbines according to a criteria where a sum of value for active power supply that is available from the selected at least one generator is equal or above a sum of values for active power consumption that is consumable by the energy storage system of the selected at least one wind turbine, the auxiliary equipment of the selected at least one wind turbine and the substation level auxiliary equipment; activating the selected wind turbine; for the selected wind turbine: electrically connecting the power input of its converter to the power output of its generator, electrically connecting the power output of its converter to the power input of its auxiliary equipment, the power input of its energy storage system and the corresponding cable, and electrically connecting the power input of a substation level auxiliary equipment to the cable which is electrically connected to the selected wind turbine; the activated wind turbine acting as active power supply for the substation level auxiliary equipment. The method and the control system using the same provide an effective and economic way of using the power generated by the wind turbine generator for powering the auxiliary equipment of the wind turbine, charging the energy storage system of the wind turbine and powering the substation level auxiliary equipment, during the wind farm operates in an islanding mode.

Method and controller for coordinating control of wind farm during disconnection to utility grid

A method for black starting a wind turbine and a wind farm following islanding operation, a method for restoring the wind farm following the islanding operation, and the wind turbine and wind farm. The wind turbine comprises auxiliary equipment, a generator, a converter electrically connectable to the generator, and an energy storage system, the generator is electrically connectable to the auxiliary equipment via the converter, the energy storage system is electrically connectable to the auxiliary equipment. The method for black staring the wind turbine including: measuring wind blowing smoothness degree; selecting a first power source to supply first power to the auxiliary equipment in V/f control mode and selecting a second power source to adjust an amount of active power and reactive power fed to the auxiliary equipment by the first power source in consideration of the amount of active power and reactive power demand suitable for powering the auxiliary equipment; and connecting the power sources to the auxiliary equipment.

Method for black starting wind turbine, wind farm, and restoring wind farm and wind turbine, wind farm using the same

A control system for an electric vehicle charging station (EVCS) is provided, the control system comprises: a central controller configured to receive an ancillary service order from a power grid and distribute the ancillary service order to one or more local controllers periodically; and the one or more local controllers configured to control a plurality of electric vehicle supply devices based on the distributed ancillary service order in real time. The method controlling the electric vehicle charging station (EVCS) is also provided.

Control system for electric vehicle charging station and method thereof

Growing community of inventors

Beijing, China

Xing Huang