| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized simply-constituted display device capable of displaying characters and graphics, etc., in a desired shape by the locus of a light beam. SOLUTION: The display device 10 includes a supporting part 12 for supporting a light emitting device 11 so that it can be rocked in a biaxial direction perpendicular to an optical axis, a ring cam member 14 equipped with a cam groove 14a for receiving a guide shaft 13 extending backward from the light emitting device, and a driving means 15 for the guide shaft 13, and the light emitting device includes a bulk type lens 22 constituted of an apex part 22a, a trailing end part 22c and a circumferential surface part 22b as a 2nd lens surface and a recessed part 22c constituted of a ceiling part inner end surface 22e and an inner peripheral part 22f as a 1st lens surface, a light emitting part 21 constituted of a light source 21a arranged in the recessed part, a driving part 23, a power supply part 24 and a case 25 for storing the bulk type lens and the light emitting part, and the display device 10 is constituted so that the light emitted from the light source may be made incident on the bulk type lens through the ceiling part or the inner peripheral part, and then, the light may be emitted at a narrow irradiation angle, directly or after being reflected. |
