data supply to the display section 160 from the current warning design pattern selecting section 167 to the normal image producing section 164 consequently display on the display section 160 is the normal image for example shown in fig7 and 8 by referring to which the driver can operate the radio or the audio system at step s 17 the timer 169 a of the temporary interrupt request section 169 starts at step s 18 a decision is made whether or not the preset time of the timer 169 a is over upon the time out the supply of the gate signal sg will be stopped at step s 19 therefore in case the trunk cover 44 is still open the prior display request signal s 2 will be inputted again to the warning display priority section 168 therefore the warning display priority section 168 changes the source of image data supply to the display section 160 from the current normal image producing section 164 to the warning design pattern selecting section 167 consequently the warning design pattern will be displayed again on the display section 160 as shown in fig9 and 10 according to the present embodiment if the driver operates the switch 161 or others to operate the radio and the audio system even during the prior display of the warning design pattern a normal image corresponding to the switch operation by the rider will be temporarily displayed thereby enabling desired operations and settings as usual that is it is possible to operate the radio and the audio system even during loading or unloading with the trunk cover held open in the embodiment described above either of the image data outputted from the normal image producing.