Abstract: The present application discloses a display panel. The display panel comprises a display region, a hole region, and a transition region located between the display region and the hole region. The display panel further comprises a substrate; a pixel defining layer located on a side of the substrate, the pixel defining layer comprising at least one pixel defining portion and a pixel opening enclosed by the pixel defining portion; a light-emitting layer comprising at least one light-emitting unit located within the pixel opening; and an inorganic encapsulation layer located on a side of the light-emitting unit facing away from the substrate. The inorganic encapsulation layer comprises a first hole configured to avoid cutting damage.

Abstract: The present invention discloses an apparatus and a method for evaluating properties of a temporary plugging agent based on acoustic emission, wherein the apparatus includes a fracturing machine, an acoustic emission sensor and an acoustic emission analyzer, wherein the fracturing machine is configured to load a sample when oil pressure is stable and remains unchanged in a fracture of the sample, a real fracturing condition being simulated for the sample, and oil being pumped in and a temporary plugging agent being placed into the fracture; the acoustic emission sensor is configured to detect an acoustic wave signal emitted by the sample when the fracturing machine loads the sample; and the acoustic emission analyzer is connected to the acoustic emission sensor and configured to determine that the temporary plugging agent is fractured when a fracture signal occurs in the acoustic wave signal.

Abstract: The present invention discloses an apparatus and a method for evaluating properties of a temporary plugging agent based on acoustic emission, wherein the apparatus includes a fracturing machine, an acoustic emission sensor and an acoustic emission analyzer, wherein the fracturing machine is configured to load a sample when oil pressure is stable and remains unchanged in a fracture of the sample, a real fracturing condition being simulated for the sample, and oil being pumped in and a temporary plugging agent being placed into the fracture; the acoustic emission sensor is configured to detect an acoustic wave signal emitted by the sample when the fracturing machine loads the sample; and the acoustic emission analyzer is connected to the acoustic emission sensor and configured to determine that the temporary plugging agent is fractured when a fracture signal occurs in the acoustic wave signal.