Abstract: This disclosure relates to an organic electroluminescent device, comprising: a light emitting layer comprising a plurality of light emitting regions arranged in an array, each light emitting region being an organic electroluminescent region; an electron transport layer, a cathode and a transflective layer successively disposed in a first direction from the light emitting layer towards a light emergent side of the organic electroluminescent device starting from the light emitting layer; and a hole transport layer, an anode and a reflective layer successively disposed in a second direction opposite to the first direction starting from the light emitting layer. In addition, in a projection region of at least one light emitting region on the hole transport layer, the hole transport layer has at least two portions of different thicknesses for selecting a wavelength range of light emitted by the at least one light emitting region and/or enhancing the emitted light.

Abstract: The present disclosure provides an organic light emitting diode (OLED) and a manufacturing method of the same, and a display device. The OLED comprises a first portion and a second portion which are manufactured by different processes and sequentially stacked, wherein the first portion comprises a first carrier transport layer, a first light emitting layer, and a connecting layer between the first light emitting layer and the second portion, which are sequentially stacked, the second portion comprises a second carrier transport layer, the first light emitting layer comprises an N-type base material and a P-type base material, and the connecting layer comprises a material corresponding to carriers in the first carrier transport layer. The OLED provided by the present disclosure can not only make light emission stable, maintain a good efficiency of light emission, but obtain light with an ideal color and prevent a phenomenon of “unexpected emission of light”.

Abstract: The present disclosure provides an organic light-emitting diode display substrate, a method of preparing the same, and a display device. The organic light-emitting diode display substrate includes: a light-emitting layer, a light modulation layer, and a color conversion layer, in which the light-emitting layer is configured to emit first color light, the light modulation layer and the color conversion layer are arranged on different light-exiting paths of the light-emitting layer, the color conversion layer is configured to convert first color light into second color light and third color light, and the light modulation layer is configured to modulate an emergent direction of first color light.

Abstract: The film production method includes: forming an ink layer on the base substrate covering the surface of the base substrate, the ink layer including a solvent and a film-forming material dissolved in the solvent; blowing gas to the ink layer so that the solvent in the ink layer spreads towards the periphery of the base substrate; removing the solvent in the ink layer so that the film-forming material in the ink layer forms a film covering the surface of the base substrate.

Abstract: A control method for a pixel circuit, a control circuit for a pixel circuit and a display device are provided. A timing sequence of the pixel circuit includes a driving display stage and a non-display stage. The non-display stage includes a reverse bias time period. The control method includes: inputting, in the reverse bias time period, a first control signal to an input end of the pixel circuit to make both the light-emitting element and the driving transistor to be reverse biased.

Abstract: An array substrate includes a base substrate, a pixel definition layer, a light-emitting layer, and a plurality of auxiliary electrodes. A pixel definition layer is formed on the base substrate, and includes patterned retaining walls and a plurality of openings defined by the retaining walls. A surface of each of the retaining walls facing away from the base substrate is provided with a first groove. A light-emitting layer is formed on the retaining wall and in the plurality of openings. The light-emitting layer conformally covers respective first grooves of the retaining walls to form respective second grooves. Each of the plurality of auxiliary electrodes is formed in a respective one of the second grooves.

Abstract: A driving compensation method for a pixel circuit includes: in a compensation phase of the pixel circuit, providing a preset signal to the control terminal of the driving transistor to write the preset signal to the control terminal of the driving transistor, to write internal loss voltage of the driving transistor to the first terminal of the driving transistor; wherein the compensation phase includes a first external compensation phase and a second external compensation phase; in the first external compensation phase, the preset signal is a sum of a reference signal and a threshold voltage of the driving transistor; in the second external compensation phase, the preset signal is the sum of the data signal and the threshold voltage of the driving transistor.

Abstract: A method and apparatus are disclosed for reducing the coupling that otherwise can arise between word lines and control gate lines in a flash memory system due to parasitic capacitance and parasitic resistance. The flash memory system comprises an array of flash memory cells organized into rows and columns, where each row is coupled to a word line and a control gate line.

Abstract: The present disclosure provides a display backboard, a method for fabricating the same and a display device. The display backboard includes a plurality of pixel units arranged in an array, each of the pixel units includes a plurality of sub-pixels, and each of the sub-pixels includes a substrate, a first electrode, a light emitting layer, and a second electrode stacked in sequence. The plurality of the sub-pixels have different emission colors, and thicknesses of the first electrodes among the plurality of the sub-pixels are different, and the thickness of the first electrode is configured so that an emission dipole of the sub-pixel is located at a second anti-node of standing wave on the first electrode side.

Abstract: A pixel circuit comprising an organic light emitting diode; a driving transistor including a gate, a source connected to a first node, a drain connected to a second power supply terminal; and a photosensitive circuit connected between a second node and a third node, the second node configured to receive a reference voltage. The driving transistor is configured to, responsive to a gate voltage and a source voltage, control a magnitude of a driving current flowing through the organic light emitting diode. The photosensitive circuit is configured to sense an intensity of light emission of the organic light emitting diode and to set a potential at the third node according to the reference voltage and the intensity that was sensed, the potential that was set being detectable by an external circuit via a sense line.

Abstract: Embodiments of the present disclosure provide a driving method for a pixel circuit. The pixel circuit includes a light emitting device and a drive transistor. The method includes: compensating the drive transistor in a first compensation manner including an internal voltage compensation during an operation period of the light emitting device; and compensating the drive transistor in a second compensation manner including the internal voltage compensation and an external voltage compensation during a non-operation period of the light emitting device.

Abstract: An aerial dispensing method includes obtaining a wind velocity of a wind that causes a drift to a substance dispensed from an unmanned aerial vehicle (UAV), and controlling one or more components of the UAV based on the obtained wind velocity to cause at least mitigation to the drift.

Abstract: An unmanned aerial vehicle (UAV) includes one or more propulsion units configured to generate lift to effect flight of the UAV, one or more receivers configured to receive user input from a remote controller, and one or more processors configured to: 1) permit the UAV to fly autonomously along a planned trajectory when no user input is received by the one or more receivers and 2) permit the UAV to fly completely based on the user input when the user input is received by the one or more receivers.

Abstract: A method and apparatus are disclosed for reducing the coupling that otherwise can arise between word lines and control gate lines in a flash memory system due to parasitic capacitance and parasitic resistance. The flash memory system comprises an array of flash memory cells organized into rows and columns, where each row is coupled to a word line and a control gate line.

Abstract: Systems and methods for the automated fulfillment of orders from a fulfillment network including consumer-facing retail locations. Orders are partitioned into suborders, which are in turn assigned to retail locations based on forecasted demand for the suborder items at the retail locations. The assignment process considers operational data for each retail location such as the number of employees, the inventory of suborder items, shipping rate cards, return policies, business hours, pick decline estimations, etc.

Abstract: A display panel, a driving method thereof, and a display device are provided in the field of display technology. The display panel includes: a plurality of sub-pixels arranged in an array. The plurality of sub-pixels arranged in an array include at least one target sub-pixel, and each target sub-pixel includes: a first electrode, a second electrode and N light-emitting units arranged in a laminated mode between the first electrode and the second electrode, wherein N is an integer greater than 1. A transparent electrode is arranged between any two adjacent light-emitting units among the N light-emitting units, and each light-emitting unit is configured to emit light under the drive of two electrodes adjacent thereto.

Abstract: An organic electroluminescence display substrate and a fabrication method thereof, a display panel and a display device are provided. The organic electroluminescence display substrate includes a pixel array and a light extraction layer. The pixel array includes a plurality of pixels, each pixel includes a first sub-pixel emitting light of a first color, and each first sub-pixel includes an organic electroluminescence element. The light extraction layer covers on the pixel array, and at least includes a plurality of first light extraction units and a plurality of second light extraction units having different optical properties. A cathode light-emission side of each first sub-pixel is covered by at least one first light extraction unit and at least one second light extraction unit, or the cathode light-emission sides of two adjacent first sub-pixels are respectively covered by at least one first light extraction unit and at least one second light extraction unit.

Abstract: An obstacle-avoidance control method comprises acquiring a distance between an unmanned aerial vehicle (UAV) and a front object in a flying direction of the UAV; and controlling a flying altitude of the UAV according to the distance between the UAV and the front object.

Abstract: A display device is provided in embodiments of the disclosure relating to the field of display technology, the display device including: a liquid crystal display panel; and an organic electroluminescent display panel provided opposite to the liquid crystal display panel and configured to function as a backlight source for the liquid crystal display panel; the liquid crystal display panel has a display region defined therein, and comprises a plurality of pixel units arranged in an array and located in the display region, each of the plurality of pixel units comprising a plurality of sub-pixel units; the organic electroluminescent display panel has a light-emitting region defined therein and opposite to the display region, and comprises a plurality of light-emitting units arranged in an array and located in the light-emitting region, each of the plurality of light-emitting units comprising a plurality of light-emitting sub-units; and an area of each of the plurality of sub-pixel units is smaller than an area of

Abstract: This disclosure relates to an electroluminescent display, a manufacture method thereof, and a display device. The electroluminescent display device comprises: a substrate, and a plurality of pixel units arranged in an array on the substrate. Each pixel unit comprises a plurality of sub-pixel units. Each pixel unit comprises at least two light-emitting layers connected in series. Furthermore, in each pixel unit, at least one light-emitting layer comprises at least two light-emitting units arranged in parallel and emitting light of different colors. Besides, in each pixel unit, at least one light-emitting unit is configured to be shared by two adjacent sub-pixel units of a corresponding pixel unit.