Abstract: A display panel and a display device are provided. The display panel includes a substrate, signal lines located on the substrate, and a plurality of light-emitting elements each located on a side of one of the signal lines facing away from the substrate. Each light-emitting element includes a first electrode, a light-emitting layer, and a second electrode that are stacked sequentially. Each signal line includes at least one overlapping portion overlapping the light-emitting layer of one of the light-emitting elements in a direction perpendicular to the display panel. An angle ? between an extending direction of a part of the at least one overlapping portion and a pixel column direction in a display region that satisfies: 0°<?<90°, or an angle ? between an extending direction of a tangent of a part of the at least one overlapping portion and a pixel column direction in a display area that satisfies: 0°<?<90°.

Abstract: This invention relates to a piezoelectric ceramic material of a quarternary system, formulated on the basis of ternary system materials (PCM and PMN). Said quarternary system piezoelectric ceramic material consists of lead niobate with Mg (Pb (Mg.sub.1/3 Nb.sub.2/3)O.sub.3, lead niobate with Mn (Pb(Mn.sub.1/3 Nb.sub.2/3)O.sub.3), lead zirconate (PbZrO3) and lead titanate (PbTiO3), and possesses excellent properties for large power output purposes, and is suitable for making piezoelectric transformers of large power output. A single piece piezoelectric transformer (dimensions 100.times.25.times.36 mm3) using the material of the present invention is found to have a maximum output power of 50 W. The material according to this invention has a simple preparing process, a wider and lower sintering temperature range, is fine and compact in ceramic structure, and has a high rate of success of finished products.