Head-up display system and optical functional layer for head-up display
AssigneeNippon Kayaku Kabushiki Kaisha
InventorsChihiro Takahashi, Yoshihiko Taira, Mitsunori Nakamura, Tomoyuki Hayasaki, Yoshiyuki Yahagi
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Abstract
The present disclosure relates to a head-up display system including image display unit for emitting display light showing a display image, and functional glass on which the image cast from the image display unit is projected. The functional glass includes an optical functional layer exhibiting reverse wavelength dispersibility, the functional glass is disposed at an angle α of 20° or more and 70° or less, and a reflected image is visually confirmed within visual angles of Brewster angle β−(90°−the angle α)±15° to the functional glass.
Claims16
A head-up display system comprising:
- image display unit that emits display light showing a display image;
- and
- functional glass on which the image cast from the image display unit is projected,
- wherein the functional glass comprises an optical functional layer exhibiting reverse wavelength dispersibility,
- the functional glass is disposed at an angle α of 20° or more and 70° or less,
- a reflected image is visually confirmed within visual angles of Brewster angle β−(90°−the angle α)±15° to the functional glass,
- the optical functional layer comprises two phase difference layers, and
- among the two phase difference layers, one phase difference layer with a higher absolute value of a slow axis angle has a higher phase difference value than the other phase difference layer with a lower absolute value of a slow axis angle.
A head-up display system comprising:
- image display unit that emits display light showing a display image;
- and
- functional glass on which the image cast from the image display unit is projected,
- wherein the functional glass comprises an optical functional layer exhibiting reverse wavelength dispersibility,
- the functional glass is disposed at an angle α of 20° or more and 70° or less,
- a reflected image is visually confirmed within visual angles of Brewster angle β−(90°−the angle α)±15° to the functional glass,
- the optical functional layer comprises two phase difference layers, and
- the display light emitted from the image display unit comes in from the side nearer to the phase difference layer having a higher phase difference value among the two phase difference layers.
Dependencies are inferred from the claim text.