JPS6444913A - Head up display device - Google Patents
Head up display deviceInfo
- Publication number
- JPS6444913A JPS6444913A JP20226487A JP20226487A JPS6444913A JP S6444913 A JPS6444913 A JP S6444913A JP 20226487 A JP20226487 A JP 20226487A JP 20226487 A JP20226487 A JP 20226487A JP S6444913 A JPS6444913 A JP S6444913A
- Authority
- JP
- Japan
- Prior art keywords
- display
- display information
- information
- blue
- green
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To observe display information by a satisfactory contrast under any environment, by providing a diffraction optical element of a transmission type or a reflection type having a diffraction efficiency being observable against at least two wavelengths, on a luminous flux coupling element. CONSTITUTION:Display information of green passes through a relay lens 3 and is made incident on a hologram 8 as a luminous flux coupling element having a diffraction efficiency against, for instance, wavelength of green and blue, diffracted, and in a visible position 7, a virtual image of the display information on a display screen 2 is formed in green. Subsequently, this display information is superposed with image information 9 of a scene of the external world, which is passed through the hologram 8 and observed in the same visual field. When a main display color of the image information 9 become green, a display color of the display information of the display element 9 is changed to blue. The hologram 8 has a diffraction efficiency being observable satisfactorily against the wavelength of blue, as well, therefore, is diffracted in the same way, and in the visible position 7, the virtual image of the display information on the display screen 2 is formed in blue. In such a way, both the display information and the image information can be observed by a satisfactory contrast.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20226487A JPS6444913A (en) | 1987-08-13 | 1987-08-13 | Head up display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20226487A JPS6444913A (en) | 1987-08-13 | 1987-08-13 | Head up display device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6444913A true JPS6444913A (en) | 1989-02-17 |
Family
ID=16454661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20226487A Pending JPS6444913A (en) | 1987-08-13 | 1987-08-13 | Head up display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6444913A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02308120A (en) * | 1989-05-23 | 1990-12-21 | Nippondenso Co Ltd | Display device |
US5210624A (en) * | 1989-09-19 | 1993-05-11 | Fujitsu Limited | Heads-up display |
US5257133A (en) * | 1991-09-11 | 1993-10-26 | Hughes Aircraft Company | Re-imaging optical system employing refractive and diffractive optical elements |
-
1987
- 1987-08-13 JP JP20226487A patent/JPS6444913A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02308120A (en) * | 1989-05-23 | 1990-12-21 | Nippondenso Co Ltd | Display device |
US5210624A (en) * | 1989-09-19 | 1993-05-11 | Fujitsu Limited | Heads-up display |
US5257133A (en) * | 1991-09-11 | 1993-10-26 | Hughes Aircraft Company | Re-imaging optical system employing refractive and diffractive optical elements |
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