Abstract: A display panel, a manufacturing method thereof, and a display device are provided. The display panel comprises a base substrate, an effective region provided on the base substrate and a bonding region located on one side of the effective region; the bonding region comprises a bonding pin region including a bonding pin, a virtual pin and test signal lines; an orthographic projection of at least one of the test signal lines on the base substrate is within a range of an orthographic projection of the virtual pin on the base substrate, and the orthographic projection of the virtual pin on the base substrate does not overlap with an orthographic projection of the bonding pin on the base substrate.

Abstract: A display substrate and a preparation method therefor, and a display device, the display substrate including a base as well as a display area, a binding needle area, a first unit test electrode and a second unit test electrode which are on one side of the base. The binding needle area is on one side of the display area; the first unit test electrode is on the side, away from the display area, of the binding needle area; the second unit test electrode is on the side, away from the binding needle area, of the first unit test electrode; the display substrate comprises a first metal layer, a second metal layer and an insulating layer between the first metal layer and the second metal layer; the first unit test electrode is on the first metal layer, and the second unit test electrode is on the second metal layer.

Abstract: A display substrate and a display device are provided. The display substrate includes a base substrate and a plurality of subpixels provided on the base substrate. Each subpixel includes a pixel circuit. The plurality of subpixels include first subpixels. The display substrate further includes power lines. Each power line is configured to provide a first supply voltage for the corresponding first subpixels, the power line is provided on a side of the pixel electrode of the first subpixel near the base substrate, and the power line includes a power line main body and a power line protrusion protruded from the power line main body. The power line protrusion is at least partially overlapped with the pixel electrode of the first subpixel in a direction perpendicular to the base substrate. The display substrate can effectively improve the display quality.

Abstract: A display substrate has a display area and a peripheral area. The display substrate includes a base substrate; an insulating layer on the base substrate and in at least the peripheral area; a plurality of light emitting elements on the base substrate and in the display area; an encapsulating layer on a side of the plurality of light emitting elements distal to the base substrate to encapsulate the plurality of light emitting elements; and a dam layer on a side of the insulating layer distal to the base substrate. The encapsulating layer includes a first inorganic encapsulating sublayer extending from the display area into the peripheral area. The display substrate has a groove extending into the first insulating layer in the peripheral area, and substantially surrounding the display area. The first inorganic encapsulating sublayer extends into at least a portion of the groove.

Abstract: A display substrate has a display area and a peripheral area. The display substrate includes a base substrate; an insulating layer on the base substrate and in at least the peripheral area; a plurality of light emitting elements on the base substrate and in the display area; an encapsulating layer on a side of the plurality of light emitting elements distal to the base substrate to encapsulate the plurality of light emitting elements; and a dam layer on a side of the insulating layer distal to the base substrate. The encapsulating layer includes a first inorganic encapsulating sublayer extending from the display area into the peripheral area. The display substrate has a groove extending into the first insulating layer in the peripheral area, and substantially surrounding the display area. The first inorganic encapsulating sublayer extends into at least a portion of the groove.

Abstract: A touch control structure is provided. The touch control structure includes a plurality of first mesh electrodes arranged in a plurality of rows and a plurality of second mesh electrodes arranged in a plurality of columns. The touch control structure includes a plurality of bendable mesh blocks along a column direction, and a plurality of gaps respectively in the plurality of bendable mesh blocks. In a respective bendable mesh block of the plurality of bendable mesh blocks, a respective gap of the plurality of gaps includes a plurality of line opens respectively breaking open multiple mesh lines of the respective bendable mesh block. The respective gap spaces apart the respective bendable mesh block into a respective first half mesh block and a respective second half mesh block directly adjacent to each other, which are insulated from each other by the respective gap.

Abstract: A display substrate, a display panel, and a display device are provided. The display substrate includes: a base substrate; a plurality of sub-pixels in the display pixel region, wherein each sub-pixel includes a pixel driving circuit; a plurality of first dummy sub-pixel structures on the base substrate and in the first dummy pixel region, wherein at least one first dummy sub-pixel structure includes a compensation capacitor; and a plurality of scan signal lines arranged on the base substrate and configured to transmit a scan signal to the pixel driving circuit. At least one scan signal line extends through the display pixel region and the first dummy pixel region, and the at least one scan signal line is electrically connected to the pixel driving circuit of each sub-pixel in a row of sub-pixels and is further electrically connected to the compensation capacitor of the at least one first dummy sub-pixel structure.

Abstract: This disclosure relates to the field of display technologies and, in particular to a thin film packaging structure and a display panel. A thin film packaging structure includes a first inorganic packaging layer for covering a device to be packaged; an organic packaging layer formed at a side of the first inorganic packaging layer; a second inorganic packaging layer formed at a side of the organic packaging layer facing away from the first inorganic packaging layer; and at least one first inorganic adjusting layer formed at a side of the first inorganic packaging layer facing away from the device to be packaged. The at least one first inorganic adjusting layer has an elasticity modulus greater than that of the first inorganic packaging layer or the second inorganic packaging layer.

Abstract: This disclosure relates to the field of display technologies and, in particular to a thin film packaging structure and a display panel. A thin film packaging structure includes a first inorganic packaging layer for covering a device to be packaged; an organic packaging layer formed at a side of the first inorganic packaging layer; a second inorganic packaging layer formed at a side of the organic packaging layer facing away from the first inorganic packaging layer; and at least one first inorganic adjusting layer formed at a side of the first inorganic packaging layer facing away from the device to be packaged. The at least one first inorganic adjusting layer has an elasticity modulus greater than that of the first inorganic packaging layer or the second inorganic packaging layer.

Abstract: The present invention discloses a bullet with a negative Poisson's ratio effect and a method of designing thereof. The bullet includes a cylindrical section of the bullet having a negative Poisson's ratio design, and a conical tail of the bullet and a tip of the bullet each with a matching design; the cylindrical section of the bullet is a tubular structure having periodically alternating transverse and vertical holes; the tubular structure includes a plurality of holes, with a center axis of one hole being axially perpendicular to a center axis of another adjacent hole, that is, the axis of each hole being structurally orthogonal to an adjacent hole; and the holes in rows and columns are periodically arranged into the tubular structure, which is a tubular structure having the negative Poisson's ratio effect.

Abstract: A metal mask, a display panel and a display device are proposed. The metal mask comprises an opening region and a peripheral region surrounding the opening region. The peripheral region is provided with a first groove, the first groove may surround the opening region. By arranging a first groove surrounding the opening region in the peripheral region, sagging of the metal mask during the fabrication of the display panel can be decreased effectively, and tension of the metal mask can be reduced, which improves the thickness uniformity of an inorganic encapsulation layer formed by using the metal mask, thereby achieving a higher production yield of the display panel.

Abstract: A method for constructing a body-in-white (BiW) spot welding deformation prediction model based on a graph convolutional network (GCN) includes: 1) acquiring a welding feature and 3D coordinates of a spot weld to form an eigenvector and extracting designed 3D coordinates at each 3D coordinate measurement point; 2) encoding, by an encoder, eigenvectors and designed 3D coordinate vectors into hidden space vectors of spot welds and hidden space vectors of the coordinate measurement points, respectively, and constructing a graph topology G through a k-nearest neighbors algorithm; 3) decomposing a Laplacian eigenvector of the constructed graph topology G to acquire frequency domain components, and linearly transforming eigenvalues corresponding to the frequency domain components to construct a multi-layer GCN; 4) inputting the thermodynamic and kinetic information of each coordinate measurement point into a deep neural network and decoding a final deformation at each coordinate measurement point; and 5) optimizing

Abstract: A method for identifying a critical error of a worm gear machine, step 1: obtaining an actual forward kinematic model T27a and an ideal forward kinematic model T27i from a coordinate system of a worm gear hob to a coordinate system of a worm gear, thereby establishing a geometric error-pose error model of the worm gear machine; step 2: regarding the geometric error-pose error model of the worm gear machine as a multi-input multi-output (MIMO) nonlinear system, and solving, by taking the geometric error of each motion axis of the worm gear machine as an input feature X, and a pose error between the worm gear hob and the worm gear as an output variable Y, an importance coefficient of each input feature with a random forest algorithm; and step 3: determining a critical error affecting a machining accuracy of the worm gear machine.

Abstract: The present disclosure provides a worm gear machine, including a workbench, a cutter holder and a cutter holder adjusting system, where the cutter holder includes a big bracket, a first slide rail is disposed on the big bracket, a slide seat in sliding fit with the first slide rail is disposed on the first slide rail, a second slide rail is disposed on the slide seat, a small bracket in sliding fit with the second slide rail is disposed on the second slide rail; and a cutter holder spindle is disposed between the big bracket and the slide seat, a cutter bar synchronously rotating with the cutter holder spindle is disposed between an end of the cutter holder spindle facing toward the small bracket and the small bracket, and a gearbox for driving the cutter spindle to rotate is disposed in the big bracket.

Abstract: A display substrate and a preparation method therefor, and a display device, the display substrate including a base as well as a display area, a binding needle area, a first unit test electrode and a second unit test electrode which are on one side of the base. The binding needle area is on one side of the display area; the first unit test electrode is on the side, away from the display area, of the binding needle area; the second unit test electrode is on the side, away from the binding needle area, of the first unit test electrode; the display substrate comprises a first metal layer, a second metal layer and an insulating layer between the first metal layer and the second metal layer; the first unit test electrode is on the first metal layer, and the second unit test electrode is on the second metal layer.

Abstract: A display panel including a display area and a non-display area surrounding the display area, wherein the non-display area includes: a substrate, at least a part of a surface of the substrate being non-planar; and an inorganic layer conformally located on one side of the substrate and in contact with the at least a part of the surface.

Abstract: A display substrate has a display area and a peripheral area. The display substrate includes a base substrate; an insulating layer on the base substrate and in at least the peripheral area; a plurality of light emitting elements on the base substrate and in the display area; an encapsulating layer on a side of the plurality of light emitting elements distal to the base substrate to encapsulate the plurality of light emitting elements; and a dam layer on a side of the insulating layer distal to the base substrate. The encapsulating layer includes a first inorganic encapsulating sublayer extending from the display area into the peripheral area. The display substrate has a groove extending into the first insulating layer in the peripheral area, and substantially surrounding the display area. The first inorganic encapsulating sublayer extends into at least a portion of the groove.

Abstract: Disclosed is a nano-layered dual hydroxide-biological factor combined system for promoting nerve regeneration to repair a spinal cord injury. The preparation method therefor comprises: 1) synthesizing a nano-layered dual hydroxide CL1; and 2) co-incubating 10 mg CL1 and 200-2000 ng of biological factors NT3, VEGF or bFGF in a low-speed shaker at 4° C. for 2 hours using an ion exchange method, centrifuging same and then obtaining the precipitate. Experiments on transection and resorption spinal cord injury models show that this combined system has a significant recovery effect on the behavior of model mice, can reconstruct the neural circuit of a damaged area over time and achieves an ideal repair effect with regard to a spinal cord injury.

Abstract: A display substrate has a display area and a peripheral area. The display substrate includes a base substrate; a first insulating layer on the base substrate and in at least the peripheral area; a plurality of light emitting elements on the base substrate and in the display area; and an encapsulating layer on a side of the plurality of light emitting elements distal to the base substrate to encapsulate the plurality of light emitting elements. The encapsulating layer includes a first inorganic encapsulating sublayer extending from the display area into the peripheral area. The display substrate has a groove extending into the first insulating layer in the peripheral area, forming a first perimeter substantially surrounding the display area. The first inorganic encapsulating sublayer extends into at least a portion of the groove.

Abstract: A display substrate, a display panel, and a display device are provided. The display substrate includes: a base substrate; a plurality of sub-pixels in the display pixel region, wherein each sub-pixel includes a pixel driving circuit; a plurality of first dummy sub-pixel structures on the base substrate and in the first dummy pixel region, wherein at least one first dummy sub-pixel structure includes a compensation capacitor; and a plurality of scan signal lines arranged on the base substrate and configured to transmit a scan signal to the pixel driving circuit. At least one scan signal line extends through the display pixel region and the first dummy pixel region, and the at least one scan signal line is electrically connected to the pixel driving circuit of each sub-pixel in a row of sub-pixels and is further electrically connected to the compensation capacitor of the at least one first dummy sub-pixel structure.