EP0229876A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
On-vehicle head up display device
Assignee: Yazaki Corp
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Filing: 1986-09-17
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Granted: —
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Expires: 2006-09-17
Abstract
Abstract In an on-vehicle head up display device employing a catoptric system for a windsheid glass of an automobile to project a display image onto an inner surface of the windshield glass, an optical system for letting a virtual image of the display image of a display means enter the windshield glass is adapted to make an angle formed by light beams of the virtual image entering the windshield glass less than a monocular resolving power. Further, an optical means for correcting parallax of the light beams of the virtual image is provided between the optical system and the windshield glass. Thus, a double image formation and binocular parallax may be eliminated. FIG.9
Inventors
- 👤 Yoshiyuki C/O Yazaki Technical Centre Suzuki
- 👤 Tatsumi Ohtsuka
- 👤 Tadashi Iino
- 👤 Akihisa Kasahara
- 👤 Noriyasu Tomiyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:41
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B2027/0118; G02B2027/012
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
l. In an on-vehicle head up display device employing a catoptric system for a windshield glass of an automobile to project a display image onto an inner surface of said windshield glass, the improvement comprising a display means for indicating various information, and an optical system for letting a virtual image of said display image of said display means enter said windshield glass, said optical system being adapted to make an angle formed by light beams of said virtual image entering said windshield glass less than a monocular resolving power according to reflective conditions of said windshield glass.
Claim 2
Dependent Claim
19 words
The on-vehicle head up display device as defined in claim I, wherein said monocular resolving power is five minutes.
Claim 3
Dependent Claim
50 words
The on-vehicle head up display device as defined in claim I, wherein said optical system is synthesized with said windshield glass having curvature to form a synthetic optical system, said synthetic optical system forming a virtual image of said display image and letting said virtual image enter said windshield glass.
Claim 4
Dependent Claim
24 words
The on-vehicie head up display device as defined in claim I, wherein said optical system comprises a lens system having a large aperture ratio.
Claim 5
Dependent Claim
47 words
The on-vehicle head up display device as defined in claim I, further comprising another catoptric system provided on a light axis between said display means and said optical system for reflecting said display image of said display means to let said display image enter said optical system.
Claim 6
Dependent Claim
40 words
The on-vehicle head up display device as defined in claim 1, further comprising an optical means provided between said optical system and said windshield glass for correcting parallax of light beams of said virtual image reflected on said windshield glass.
Claim 7
Dependent Claim
33 words
The on-vehicle head up display device as defined in claim 6, wherein said optical means is adapted to correct vertical parallax of said light beams of said virtual image from said windshield glass.
Claim 8
Dependent Claim
18 words
The on-vehicle head up display device as defined in claim 6, wherein said optical means comprises a prism.
Claim 9
Dependent Claim
89 words
In an on-vehicle head up display device employing a catoptric system for a windshield glass of an automobile to project a display image onto an inner surface of said windshield glass, the improvement comprising a display means for indicating various information, and an optical system for letting a virtual image of said display image of said display means enter said windshield glass, said optical system forming said virtual image of said display image of said display means at a distance of 3 M. or more from said windshield glass.
Claim 10
Dependent Claim
108 words
In an on-vehicle head up display device employing a catoptric system for a windshield glass of an automobile to project a display image onto an inner surface of said windshield glass, the improvement comprising a display means for indicating various information, an optical system for letting said virtual image of said display image of said display means enter a part of said windshield glass slantwise, and an optical means for correcting parallax of light beams of said virtual image reflected on said windshield glass, said optical system being adapted to make an angle formed by light beams incident upon said windshield glass less than a monocular resolving power.
References Cited (Backward Citations)
No citation records indexed.
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