| 摘要 |
The present invention relates to a control panel, in particular for a motor vehicle, provided with at least one rotary button ( 10 ) for adjusting a parameter relating to an air stream propelled by a ventilating, heating and/or air conditioning apparatus, characterised in that the said adjusting button ( 10 ) is an optical encoder with selective light emission and reception, and comprising a rotatable part ( 20 ) protruding from the control panel, and a fixed part ( 30 ) co-operating with the moving part ( 20 ) for emitting and receiving the light. This control panel is adapted to adjust, for example, the temperature, flow rate or distribution of the said air stream.
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