PROBLEM TO BE SOLVED: To provide an on-vehicle head-up display device capable of shortening a startup time while adopting laser diodes as a light source.;SOLUTION: An on-vehicle head-up display device 1 includes: a light source part 2 including a red laser diode 11, a green laser diode 13, and a blue laser diode 15 to irradiate light of them by multiplexing the light; a scan mirror part 3; a temperature measurement part 4; and a control part 5 for forming an image by controlling the light source part 2 and the scan mirror part 3. The control part 5 controls the light source part 2 such that emission intensity of the red laser diode 11 is equal to 40% or below of a sum of emission intensity of the green laser diode 13 and emission intensity of the blue laser diode 15 on the basis of temperature information of the temperature measurement part 4 when temperature of the light source part 2 is equal to predetermined first temperature or more.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT
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