JPS6444913A - Head up display device - Google Patents

Head up display device

Info

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
Application number
JP20226487A
Other languages
Japanese (ja)
Inventor
Naosato Taniguchi
Tetsuo Kuwayama
Nobuo Kushibiki
Yoko Yoshinaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP20226487A priority Critical patent/JPS6444913A/en
Publication of JPS6444913A publication Critical patent/JPS6444913A/en
Pending legal-status Critical Current

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.
JP20226487A 1987-08-13 1987-08-13 Head up display device Pending JPS6444913A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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