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|1. (WO2018066437) LIGHT SOURCE DEVICE AND HEAD UP DISPLAY DEVICE|
|Title:||LIGHT SOURCE DEVICE AND HEAD UP DISPLAY DEVICE|
Provided is a compact and light-weight light source device having high light utilization efficiency and readily usable as a planar light source by being modularized. This light source device (10) comprises: a light source unit containing a plurality of LED elements (14); an LED collimator (15) containing a plurality of collimator elements, each disposed on the light-emission axis of each of the plurality of LED elements (14); and a light-guide body (17) disposed on the exit side of the LED collimator (15). The light-guide body (17) comprises: an inlet portion (171) having an inlet surface wherefrom light from the LED element (14) and on the light-emission axis is let in; and an outlet portion (173) having an outlet surface wherefrom the light is let out. The light-guide body has a free-form surface shape for achieving a predetermined light distribution control being provided on at least the inlet surface or the outlet surface.