Image position control device in a head-up visualization device.

摘要

The object of the invention is to guarantee the position of the symbolic image generated on a combiner (30) by a head-up display system. Two tests are alternately carried out, an overall-position test using a light spot (12) created on the image, and a combiner (30)-position test using a light source (40) structurally connected to the structure (200) of the image generator. The signals emitted by each of the light sources (12, 40) are received on the same position detector (50), from which the signals are processed by the same circuit (60) acting on the voltages X, Y for centring (aligning) the image. The circuit (60) includes a gain amplifier (61) provided with a gain switch making it possible to change the amplification as a function of the test in progress. <IMAGE>