Light-emitting element, useful for display unit, comprises first and second groups of phosphor particles distributed in binder matrix, and edges, where first and second groups of particles have first and second particle size distributions

摘要

The light-emitting element comprises a first group of phosphor particles and a second group of phosphor particles distributed in a binder matrix, and edges (K) with a roughness of less than 20 mu m. The first group of particles has a first particle size distribution, and the second group of particles has a second particle size distribution that is different from the first particle size distribution. In the first group of particles, 95% of the particles have a largest dimension of 5-30 mu m. In the second group of particles, 95% of the particles have a largest dimension of 0.2-2 mu m. The light-emitting element comprises a first group of phosphor particles and a second group of phosphor particles distributed in a binder matrix, and edges (K) with a roughness of less than 20 mu m. The first group of particles has a first particle size distribution, and the second group of particles has a second particle size distribution that is different from the first particle size distribution. In the first group of particles, 95% of the particles have a largest dimension of 5-30 mu m. In the second group of particles, 95% of the particles have a largest dimension of 0.2-2 mu m. The phosphor particles of the first group comprise a first material such as a first phosphorescent material, and the phosphor particles of the second group comprise a second material. The light-emitting element is a three-dimensional body or is a flat, plate-like fabric, and has a mounting side (2) that has formations, pin-like projections and/or edge-like projections. A surface of the flat, plate-like fabric represents a rectangle, a triangle or an alphanumeric character, and has a thickness of 50 mu m to 2 mm. The pin-like projections and/or edge-like projections have a height of 50 mu m to 1 mm. Independent claims are included for: (1) a method of producing a light-emitting element; and (2) a process of manufacturing a display unit.