| 摘要 |
PROBLEM TO BE SOLVED: To reduce the appearance of the shadow of a lighting equipment without greatly lowering illuminance in an internally lighted signboard in which a HID (high intensity discharge) lamp apparatus is arranged at the side end part. SOLUTION: The HID lamp apparatus 2 in which a HID lamp 2a is arranged at a reflection mirror 2b, is disposed at the base body parts 1a, 1b of the short side of a rectangular frame-shaped signboard base body part 1. Display signboard parts 3a, 3b made of a vinyl chloride sheet reinforced with a net-shaped reinforcing material, are provided all over the both surfaces formed of the frame-shaped signboard base body part. The incident angle of direct light emitted from the HID lamp 2a of the HID lamp apparatus to a shortest distance vicinity part of the display signboard part is set to 20 deg. to 30 deg. by adjusting louvers 2c, 2d provided inside and at the outer edge part of the reflection mirror of the HID lamp apparatus, to constitute the internally lighted signboard. |
