Abstract: This invention is to offer an indication system and method of a meter part having excellent visibility and designing property. Alight is irradiated from the first light source toward the indicating panel from the side of the indicating face for making the background part of the indicating panel luminous with a complementary color to a color indicating the indicator part of pointers, graduations, numerals and others.

Abstract: This invention is to offer an indication system and method of a meter part having excellent visibility and designing property. Alight is irradiated from the first light source toward the indicating panel from the side of the indicating face for making the background part of the indicating panel luminous with a complementary color to a color indicating the indicator part of pointers, graduations, numerals and others.

Abstract: A casing accommodates therein three primary colors of chip LEDs. The casing is disposed in a through hole of a plate-shaped light guide. The chip LEDs are mounted on both surfaces of a substrate so as to face a peripheral surface of the through hole (light incident surface). The casing is made of a transparent synthetic resin accommodating therein the substrate and the chip LEDs. The light emitted from the chip LEDs can be introduced directly into the light incident surface of the light guide. The three primary color of chip LEDs are controlled so that a desired color and intensity of light can be efficiently introduced into the light guide.

Abstract: A light diffusion preventing structure, suitable for use in vehicles, is provided on a structural member having a hole for passing light from a light source through the structural member and onto a target area. The hole has a three-dimensional shape that has a first opening located near the light source and a second opening located on the opposite side with an inner peripheral surface running between. Both the edge of the second opening and the inner peripheral surface are located completely outside a zone defined by projecting imaginary straight lines from the point light source through the first opening. A second set of imaginary straight lines running between the edge the first opening and the opposite edge of the second opening define at least one crossing angle, the measure of which should preferably not exceed 160 degrees.

Abstract: A light diffusion preventing structure, suitable for use in vehicles, is provided on a structural member having a hole for passing light from a light source through the structural member and onto a target area. The hole has a three-dimensional shape that has a first opening located near the light source and a second opening located on the opposite side with an inner peripheral surface running between. Both the edge of the second opening and the inner peripheral surface are located completely outside a zone defined by projecting imaginary straight lines from the point light source through the first opening. A second set of imaginary straight lines running between the edge the first opening and the opposite edge of the second opening define at least one crossing angle, the measure of which should preferably not exceed 160 degrees.