Patent ID: 9439248
Filing Date: 2016-09-06
CPC Classification: H01L,H05B

Claim Text:
1. An electroluminescent display screen, comprising: a back plane; a package substrate; and a luminescent layer and a frit sealant provided between the back plane and the package substrate, wherein the electroluminescent display screen further comprises a light-shielding pattern layer for shielding the region other than the frit sealant when a laser irradiates on the frit sealant, which is formed on one side of the package substrate that faces the back plane, wherein 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, 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.