Head-up display device and cold mirror
A head-up display and display light technology, applied in the field of cold light mirror, can solve the problem of display quality degradation
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no. 1 approach
[0039] Such as figure 1 As shown, the HUD device 100 based on the first embodiment of the present disclosure is mounted on a vehicle 1 which is a type of mobile body, and is housed in an instrument panel 2. The HUD device 100 projects display light onto the windshield 3 as a projection member of the vehicle 1 through a projection window 2 a provided on the upper surface of the instrument panel 2. The display light is reflected by the windshield 3, and thus the HUD device 100 displays the image as a virtual image in a manner that the passengers of the vehicle 1 can visually recognize. That is, the display light reflected by the windshield 3 reaches the visual confirmation area EB set in the interior of the vehicle 1, and a passenger whose eyepoint EP is located in the visual confirmation area EB perceives the display light as a virtual image VI. Moreover, passengers can recognize various information through the virtual image VI. As various information displayed as an image by t...
no. 2 approach
[0091] Such as Figure 14-16 As shown, the second embodiment of the present disclosure is a modification of the first embodiment. The description of the second embodiment will focus on the differences from the first embodiment.
[0092] Such as Figure 14 As shown, the cold light mirror portion 240 of the second embodiment has a second wavelength region blocking mirror 242 and an infrared region blocking mirror 246.
[0093] The second wavelength region blocking mirror 242 is arranged on the optical path OP of the display light on the side of the display light projection unit 10 rather than the infrared region blocking mirror 246. The second wavelength region blocking mirror 242 has a mirror substrate 243 and an optical multilayer film 244. The mirror substrate 243 is formed of, for example, synthetic resin, glass, or the like in a flat plate shape having translucency.
[0094] The optical multilayer film 244 is formed on a surface 242 a of the mirror substrate 243 facing the disp...
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