Abstract: The present application discloses a display panel and a preparation method thereof, and a display device. The display panel includes a base substrate, and has a display area, a peripheral area surrounding the display area, a hole area located at the display area, and an isolation area located between the hole area and the display area. The display area includes an electroluminescent device located on the base substrate, and a packaging structure for sealing the electroluminescent device, the packaging structure includes an inorganic packaging layer and an organic packaging layer alternately stacked, and the inorganic packaging layer extends to the hole area. The isolation area includes an organic layer located on the inorganic packaging layer.

Abstract: The disclosure provides an ultrasonic signal detection circuit including a sensing circuit, a unidirectional conduction circuit and a source follower circuit. The sensing circuit is connected to an input terminal of the source follower circuit through the unidirectional conduction circuit; the sensing circuit is configured to generate a piezoelectric signal according to a received ultrasonic echo signal and output the piezoelectric signal to the unidirectional conduction circuit. The piezoelectric signal is an alternating current signal; the unidirectional conduction circuit is configured to rectify the alternating current signal to only allow a forward or a reverse current portion thereof to pass through. The forward/reverse current portion charges/discharges the input terminal of the source follower circuit after passing through the unidirectional conduction circuit.

Abstract: A mask, a mask assembly, an exposure machine, a method for testing shadowing effect on a window, and a photolithography method are provided. The mask includes a light transmission area; a functional window provided at a side of the light transmission area; and at least one of a first detection mark and a second detection mark; wherein the first detection mark is flushed with a border of the functional window adjacent to an interior of the mask; and the second detection mark is disposed between the profile of the light transmission area and the functional window.

Abstract: The technology subject of the present application concerns a novel class of fused nanocrystal molecules having unique electronic properties. The application further contemplates methods for their preparation and methods of their use.

Abstract: The present application discloses a display panel and a preparation method thereof, and a display device. The display panel includes a base substrate, and has a display area, a peripheral area surrounding the display area, a hole area located at the display area, and an isolation area located between the hole area and the display area. The display area includes an electroluminescent device located on the base substrate, and a packaging structure for sealing the electroluminescent device, the packaging structure includes an inorganic packaging layer and an organic packaging layer alternately stacked, and the inorganic packaging layer extends to the hole area. The isolation area includes an organic layer located on the inorganic packaging layer.

Abstract: A mask, a mask assembly, an exposure machine, a method for testing shadowing effect on a window, and a photolithography method are provided. The mask includes a light transmission area; a functional window provided at a side of the light transmission area; and at least one of a first detection mark and a second detection mark; wherein the first detection mark is flushed with a border of the functional window adjacent to an interior of the mask; and the second detection mark is disposed between the profile of the light transmission area and the functional window.

Abstract: A display substrate and a method of manufacturing the same, and a display device, are disclosed. The display substrate includes a control portion and a color portion, the control portion and the color portion both including position aligning regions at corresponding positions and further including position aligning marks provided in the position aligning regions. The black matrix is located on top of the color portion and at least the position aligning marks in the color filter layer are formed in a hollowed-out structure. The position aligning marks has an increased level drop or height difference, such that more accurate position alignment may be achieved by identifying the position aligning marks based on height difference at edge of standard pattern.

Abstract: A display substrate and a method of manufacturing the same, and a display device, are disclosed. The display substrate includes a control portion and a color portion, the control portion and the color portion both including position aligning regions at corresponding positions and further including position aligning marks provided in the position aligning regions. The black matrix is located on top of the color portion and at least the position aligning marks in the color filter layer are formed in a hollowed-out structure. The position aligning marks has an increased level drop or height difference, such that more accurate position alignment may be achieved by identifying the position aligning marks based on height difference at edge of standard pattern.