INSTRUMENT LIGHTING DEVICE

摘要

An instrument lighting device configured in such a manner that even index marks disposed away from the light sources can achieve sufficient luminance using a reduced number of light sources. An instrument lighting device comprising: a pointer needle (4) mounted to a drive shaft (2) of an instrument body (3); a display panel (6) having index marks (5); a light source (7b) for lighting the index marks (5); a reflecting surface section (9) for applying the light from the light source (7b) to the display panel (6); and a reflecting wall section (10) for guiding the light from the light source (7b) toward the reflecting surface section (9). The reflecting wall section (10) comprises a circular conical first reflecting wall section (10a) for mainly lighting index marks (5) which are present in a first index mark region (N) located close to the light source (7b), and also comprises a second reflecting wall section (10b) consisting of a curved surface or a flat sloped surface for mainly lighting index marks (5) which are present in a second index mark region (F) located farther away from the light source (7b) than the first index mark region (N). The instrument lighting device can illuminate the index marks (5) on the display panel (6) by transmitted light with substantially uniform luminance.