BACKLIT GRADUATED COUNTER INCLUDING MEANS FOR SUPER-ILLUMINATING PART OF THE GRADUATIONS

摘要

The invention relates to a backlit motor vehicle counter, such as a tachometer or a revolution counter, including: a wall provided with translucent graduations arranged in a circular arc, one or more luminescent elements (16) borne by a supporting plate (13), and a light guide (18) disposed between the supporting plate (13) and the graduated wall in order to channel the light from the luminescent elements (16) towards a rear face of the graduated wall so as to illuminate all of the graduations. According to the invention, the light guide (18) is mounted such that it can rotate about an axis (AX) that passes through the centre of the circular arc, the position thereof being controlled. Moreover, the light guide (18) supports a spot lighting element (28) positioned radially on the circular arc in order to super-illuminate part of the region containing the graduations. The invention is suitable for counters intended for motor vehicles.