Electroluminescent display screen and method for preparing the same, and display device

A method for preparing an electroluminescent display screen, comprising:

• forming a luminescent layer on a back plane;
• forming, on one side of a package substrate that faces the back plane, a light-shielding pattern layer for shielding a region other than a frit sealant when a laser irradiates on the frit sealant;
• forming a frit sealant on one side of the back plane that faces the package substrate or on one side of the package substrate that faces the back plane;
• irradiating the frit sealant through a laser from one side of the package substrate that is away from the back plane, and packaging the package substrate and the back plane,
• 1wherein the light-shielding pattern layer comprises the first annular region and the second annular region, and wherein, the frit sealant surrounds the first annular region, and the second annular region surrounds the frit sealant,
• wherein a distance between an outmost side edge of a first annular region and an inmost side edge of a second annular region is in a range of 0.6 mm to 1.2 mm, and
• wherein a distance between an inmost side edge of the first annular region and an outmost side edge of the second annular region is a sum of a width of a laser beam and a laser alignment precision,
• wherein the first annular region is located inside the frit sealant, and the second annular region is located outside the frit sealant, the first annular region functions as a barrier layer for laser irradiation and as a black frame on the cover plate of the display screen, and is used for defining a display region.