| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of increase in the number of LED lamps used and the cost as well as the display being flat in a conventional signal lamp for a car using LED lamps as a light source, having a constitution with LED lamps arranged in a matrix form on board. SOLUTION: Light sources 2u, 2d are provided on an irradiation axis X so as to irradiate light back and forth with respect to the irradiation axis X of the signal lamp for a car 1, and parabolic reflection surfaces 3, 4 that are obtained by revolving a parabola having a central axis nearly perpendicular to the irradiation axis wherein each light source being nearly a focus is provided. The reflection surfaces for controlling light distribution 5, 6 are provided reflecting approximately parallel to the irradiate axis in the reflecting direction of the parabolic reflecting surfaces 3, 4. Thus the number of LED lamps used is dramatically decreased in the light fixture having identical luminous area as the conventional model, and the design for the luminescent screen can have increased flexibility. |
