Display panel and display device are provided. The display panel includes: a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The first substrate includes a first base substrate and an optical sensor disposed on the first base substrate. The second substrate includes a second base substrate, a black matrix disposed on the second base substrate, and a light collecting structure disposed on a side of the black matrix adjacent to the first substrate. The optical sensor and the light collecting structure overlap each other in a direction perpendicular to the display panel. The light collecting structure includes at least one transparent protrusion protruded along a direction perpendicular to a surface of the first or second substrate and from the second substrate to the first substrate. The light collecting structure has a refractive index larger than the liquid crystal layer.