Abstract: A display substrate, a manufacturing method thereof and a display device are provided. The display substrate includes pixel regions (PD) and blank regions (PB), the pixel region (PD) includes first power supply lines (70) and a second power supply line (80), the first power supply lines (70) are configured to continuously provide high-level signals to a pixel driving circuit, and the second power supply line (80) is configured to continuously provide low-level signals to a patterned cathode (403), each blank region (PB) includes high-voltage power supply connecting lines connected to the first power supply lines (70) in the adjacent pixel regions (PD) and low-voltage power supply connecting lines connected to the second power supply lines (80) in the adjacent pixel regions (PD), the first power supply lines (70) and the high-voltage power supply connecting lines form a high-voltage power supply wiring with a mesh connection structure.

Abstract: Provided is a display panel. The display panel includes: a cutout region, a display region disposed on a periphery of the cutout region, and a winding region disposed between the cutout region and the display region. The display panel further includes: a substrate; a plurality of light-emitting devices disposed on the substrate, and a package layer and a light-shielding layer that are successively stacked and disposed on a side, distal from the substrate, of the plurality of light-emitting devices. The plurality of light-emitting devices are within the display region. The package layer is closer to the substrate relative to the light-shielding layer, and at least a portion of the light-shielding layer is within the winding region.

Abstract: A display substrate includes a substrate, scan signal lines, a plurality of first pixel circuits and a plurality of first light-emitting devices. The plurality of first pixel circuits are disposed on the substrate, and are located in a functional device setting region. At least one first pixel circuit includes a first transistor. At least one first light-emitting device includes a first electrode. The at least one first light-emitting device includes at least one first color light-emitting device, and the at least one first pixel circuit includes at least one first color pixel circuit, and a first color pixel circuit is electrically connected to a first color light-emitting device. An orthographic projection of a channel region of a first transistor in the first color pixel circuit on the substrate is at least partially overlapped with an orthographic projection of a first electrode of the first color light-emitting device on the substrate.

Abstract: A method for producing a needle coke includes the following steps: (1) hydrotreating a mixture of a first feedstock oil and a second feedstock oil to obtain a hydrogenated product; (2) cracking the hydrogenated product to obtain a cracked product; and (3) producing the needle coke with the cracked product as a starting material. The first feedstock oil has an aromatic carbon ratio of greater than 65 mol %, the second feedstock oil has an aromatic carbon ratio of greater than 60 mol %, the first feedstock oil has a coking starting temperature lower than that of the second feedstock oil by 10-140° C. The apparatus for carrying out the method is also provided.

Abstract: A display panel includes a base substrate including a display area and a peripheral area surrounding the display area, the display area comprises a first display area and a second display area, the first display area at least partially surrounds the second display area; a plurality of first/second pixel circuits located in the first/second display area; a plurality of first initialization signal lines, located at least in the first display area and extending in a first direction, being electrically connected to the first pixel circuit and configured to transmit a first initial voltage signal to the first pixel circuit; a plurality of second initialization signal lines, located at least in the first display area and the second display area, and electrically connected to the second pixel circuit, configured to transmit a second initial voltage signal to the second pixel circuit; the first and second initial voltage signals being different.

Abstract: A display substrate includes a base substrate, a plurality of first-region light emitting elements and a plurality of first-region pixel circuit. The base substrate includes a display region and a peripheral region at least partially surrounding the display region, wherein the display region includes a transparent display region. A plurality of first-region light emitting elements and a plurality of first-region pixel circuits are located in the transparent display region. At least one first-region pixel circuit of the plurality of first-region pixel circuits is electrically connected with at least two first-region light emitting elements emitting light in a same color. An orthographic projection of at least one first-region pixel circuit on the base substrate is overlapped with an orthographic projection of at least one first-region light emitting element on the base substrate.

Abstract: A process for preparing a supramolecular carrier photosensitizer for photodynamic therapy and a formulation thereof is disclosed for prevention, treatment, anti-inflammatory and sterilization of oral dental diseases. Supramolecular carrier consists of refined lignin, glucomannan, cysteine, and sodium benzoate at a mass ratio of 0.1-1.0%: 0.5-3%: 0.1-0.5%: 0.05%, and the balance of water. Aqueous solutions of refined lignin, glucomannan, cysteine and sodium benzoate are prepared, and a pH value of combined solution is adjusted to 6.5, so that dissolved alkali lignin is precipitated to form an efficient and stable three-dimensional polymer network skeleton, and rich hydrogen bonds are facilitated to be formed between the same molecules and different molecules of lignin and glucomannan, thereby forming a supramolecular carrier formulation loaded with the photosensitizer.

Abstract: A display substrate includes a normal display area and a transmissive display area provided within the normal display area, the normal display area being configured to perform image display, the transmissive display area including at least one pixel island, the pixel island being configured to perform image display and transmit light; the pixel island of the transmissive display area including an initial transmission line for transmitting an initial signal and at least one pixel drive circuit connected to the initial transmission line, the initial transmission line including a first transmission line with a main part extending in a first direction and a second transmission line with a main part extending in a second direction, the first transmission line and the second transmission line being connected to form a grid structure.

Abstract: A display substrate and a display device are disclosed, the display substrate has a plurality of sub-pixels arranged in an array, and includes a base substrate, a driving circuit layer, a light-emitting device layer, and a black matrix layer. Each sub-pixel includes a pixel driving circuit in the driving circuit layer and a light-emitting device in the light-emitting device layer, and the black matrix layer includes a plurality of first light-transmitting openings respectively exposing light-emitting devices (EM) of the plurality of sub-pixels, and includes a plurality of second light-transmitting openings respectively between the plurality of first light-transmitting openings. The driving circuit layer includes a plurality of light-transmitting portions, and each of the plurality of second light-transmitting openings is provided corresponding to at least one of the plurality of light-transmitting portions for transmitting light in a predetermined angle range with the surface of the display substrate.

Abstract: Disclosed are an oral hygiene device and an oral hygiene device system, and a method of using the same. The oral hygiene device includes a housing, a battery, a control chip, a light source, and a light guide needle. Battery, control chip and light source are encapsulated in housing to form the oral hygiene device. The housing includes a connector, and light source is positioned in the center of connector. The light source is electrically connected to control chip and battery. The light guide needle is mounted on a head of the housing using a mortise-tenon structure. The light guide needle includes a mounting joint, and is in mortise-tenon connection and in interference fit with the connector through the mounting joint. The oral hygiene device has less damage to teeth or healthy tissue in the oral cavity, and has a good disinfection effect on bacteria in oral cavity.

Abstract: A display substrate and a display device are disclosed, and the display substrate has a plurality of sub-pixels, and includes a base substrate, a driving circuit layer, a pixel definition layer and a light-emitting device layer, and a black matrix layer. Each sub-pixel includes a pixel driving circuit in the driving circuit layer and a light-emitting device in the light-emitting device layer. The black matrix layer includes a plurality of first light-transmitting openings respectively exposing the light-emitting devices of the plurality of sub-pixels in a direction perpendicular to a surface of the base substrate. The pixel definition layer includes a plurality of sub-pixel openings, at least part of the plurality of sub-pixel openings are in one-to-one correspondence with and at least partially overlapped with the plurality of first light-transmitting openings, and at least one of the plurality of first light-transmitting openings has an arc-shaped edge.

Abstract: A display substrate and a display device are provided, the display substrate has a plurality of sub-pixels arranged in an array, and includes a base substrate, a driving circuit layer on the base substrate, a light-emitting device layer on a side of the driving circuit layer away from the base substrate, and a black matrix layer on a side of the light-emitting device layer away from the base substrate, the black matrix layer includes a plurality of first light-transmitting openings respectively exposing light-emitting devices of the plurality of sub-pixels and a plurality of second light-transmitting openings respectively between the plurality of first light-transmitting openings; the driving circuit layer includes a plurality of light-transmitting portions, and each second light-transmitting opening is provided corresponding to at least one of the plurality of light-transmitting portions for transmitting light in a predetermined angle range with the surface of the display substrate.

Abstract: A display substrate and a display device are provided, the display substrate has a plurality of sub-pixels arranged in an array, and includes a base substrate, a driving circuit layer, a pixel definition layer, a light-emitting device layer, and a black matrix layer, each of the plurality of sub-pixels includes a pixel driving circuit in the driving circuit layer and a light-emitting device in the light-emitting device layer, the pixel definition layer includes a plurality of sub-pixel openings, the light-emitting device includes a first electrode layer, a light-emitting material layer, and a second electrode layer, the plurality of sub-pixel openings respectively expose first electrode layers of light-emitting devices of the plurality of sub-pixels; the black matrix layer includes a plurality of first light-transmitting openings respectively exposing the light-emitting devices of the plurality of sub-pixels, and at least one of the plurality of first light-transmitting openings has an arc-shaped edge.

Abstract: A display substrate and a display device are disclosed, and the display substrate has a plurality of sub-pixels, and includes a base substrate, a driving circuit layer, a pixel definition layer and a light-emitting device layer, and a black matrix layer. Each sub-pixel includes a pixel driving circuit in the driving circuit layer and a light-emitting device in the light-emitting device layer. The black matrix layer includes a plurality of first light-transmitting openings respectively exposing the light-emitting devices of the plurality of sub-pixels in a direction perpendicular to a surface of the base substrate. The pixel definition layer includes a plurality of sub-pixel openings, at least part of the plurality of sub-pixel openings are in one-to-one correspondence with and at least partially overlapped with the plurality of first light-transmitting openings, and at least one of the plurality of first light-transmitting openings has an arc-shaped edge.

Abstract: An efficiency optimization control method and system for permanent magnet synchronous motor are provided, and the method includes: step 1: obtaining an approximate optimal direct axis (d-axis) current of a permanent magnet synchronous motor by using a loss model algorithm; step 2: performing, by using the approximate optimal d-axis current as an initial value and using a deep reinforcement learning algorithm, an optimizing process on the approximate optimal d-axis current to construct an optimal deep reinforcement learning model; and step 3: inputting currently acquired state data of the permanent magnet synchronous motor into the optimal deep reinforcement learning model to obtain a control parameter value corresponding to an optimal efficiency of the permanent magnet synchronous motor, and controlling the permanent magnet synchronous motor based on the control parameter value. Therefore, real-time target control for the permanent magnet synchronous motor is achieved.

Abstract: Disclosed is a display substrate including a display region which includes a light-transmitting display region; the display substrate includes multiple light emitting elements and multiple pixel circuits, the multiple light emitting elements include multiple first type light emitting elements located in the light-transmitting display region, the multiple pixel circuits include multiple first type pixel circuits located in the light-transmitting display region, at least one first type pixel circuit among the multiple first type pixel circuits is electrically connected with at least two first type light emitting elements emitting light of a same color, and the first type pixel circuit is configured to drive the at least two first type light emitting elements to emit light; an orthographic projection of at least one first type pixel circuit on a base substrate is overlapped with an orthographic projection of at least one first type light emitting element on the base substrate.

Abstract: A display substrate includes a display region and a bonding region located on one side of the display region, the display region at least includes a first wiring region and a second wiring region, the first wiring region is provided with at least one first wiring and at least one light emitting device, the second wiring region is provided with at least one second wiring and at least one light emitting device, and the at least one light emitting device in the first region and the at least one light emitting device in the second region both include an anode; the at least one first wiring and the at least one second wiring are arranged on a same layer; the display substrate comprises a pixel drive circuit which is a Low Temperature Polycrystalline Oxide (LTPO) circuit.

Abstract: The display substrate includes pixel regions (PD) and blank regions (PB), the pixel region (PD) includes first power supply lines (70) and a second power supply line (80), the first power supply lines (70) are configured to continuously provide high-level signals to a pixel driving circuit, and the second power supply line (80) is configured to continuously provide low-level signals to a patterned cathode (403), each blank region (PB) includes high-voltage power supply connecting lines connected to the first power supply lines (70) in the adjacent pixel regions (PD) and low-voltage power supply connecting lines connected to the second power supply lines (80) in the adjacent pixel regions (PD), the first power supply lines (70) and the high-voltage power supply connecting lines form a high-voltage power supply wiring with a mesh connection structure.

Abstract: A display substrate includes a first wiring region (110) and a second wiring region (120), wherein the first wiring region (110) is provided with at least one first wiring (71) and a light emitting device, the second wiring region (120) is provided with at least one second wiring (72) and a light emitting device, and the light emitting device at least includes an anode (90). The first wiring region (110) further includes at least one first compensation line (81), an orthographic projection of the at least one anode (90) in the plane of the display substrate at least partially overlaps with an orthographic projection of the first compensation line (81) in the plane of the display substrate.

Abstract: A display panel includes a substrate, and a plurality of first pixel circuits, a plurality of first light-emitting devices and a plurality of first light-shielding portions that are located in a functional device setting region. The plurality of first light-emitting devices are disposed on a side of the plurality of first pixel circuits away from the substrate. A first light-emitting device includes a first electrode electrically connected to a first pixel circuit. The plurality of first light-shielding portions are arranged at intervals on a side of the plurality of first light-emitting devices away from the substrate. Each first light-shielding portion is provided with a first opening therein, and each first opening corresponds to a single first light-emitting device. An orthographic projection of a first portion of the first pixel circuit on the substrate is located within an orthographic projection of a first light-shielding portion on the substrate.