Display panel for instruments installed in vehicles

摘要

A display panel (10) of a speedometer includes a scattering light guide (50), a light source (LED, small incandescent lamp, etc.) La - Lc, a transparent sheet (60), and a pointer (16) having a rotation shaft (15). A masking (14) is printed on the colorless or colored transparent sheet (60). The shape of a notched part of the masking (14) forming the shining part (13) is defined in response to the display contents such as a speed scale, numerals, letters, etc. The disk-shaped scattering light guide (50) having an axis K has a center portion (51) having a uniform thickness and a tapered peripheral portion (52). Light source receiving holes (53a-53c) for receiving the light source elements La - Lc are disposed around a pointer passing hole (54). The displaying light exits mainly from the tapered periphery portion (52). In a case where a shining part (13) is required in the vicinity of the center portion (51), stipples (57) are formed on a part of the back side by blasting, so that a displaying light is produced by exiting from the scattering light guide (50).