Patent EP0687932A2 successfully refreshed from Google Patents.
EP0687932A2
Expired / Lapsed
EP
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Display device
Assignee: Canon Inc
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Filing: 1995-06-12
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Granted: —
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Expires: 2015-06-12
Abstract
Abstract A display device for displaying information is provided with an optical system for guiding the light of the display device to the eye, the optical system having, in the order in the proceeding direction of the light, an entrance face for receiving the light, a curved face for totally reflecting the light and a reflecting face concave to the eye side and adapted to reflect the light toward the eye. The reflected light is transmitted by the curved face and reaches the eye. Thus there is obtained a compact display device with satisfactorily suppressed aberrations.
Inventors
- 👤 Shoichi Yamazaki
- 👤 Takeshi Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:24
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/017; G02B27/0172; G02B27/0101; G02B2027/011; G02B2027/0138; G02B2027/0143; G02B2027/0178; G02B27/0179; G02B2027/0187; G02B2027/0192; G02B2027/0198; G02B5/00; G02B5/08; G02B5/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
33 words
Display means for forming information, characterized by having optical means for guiding the light from said display means to the eye, said optical means including a curved face for totally reflecting the light.
Claim 2
Dependent Claim
33 words
Display means for forming information, characterized by having optical means for guiding the light from said display means to the eye, said optical means including a curved face for totally reflecting the light.
Claim 3
Dependent Claim
63 words
Display means according to claim 1, wherein said optical means includes, in the order in the proceeding direction of light, an entrance face for introducing the light from said display means, said curved face and a reflecting face for reflecting the light toward the eye, wherein the light reflected by said reflecting face is transmitted by said curved face and reaches the eye.
Claim 4
Dependent Claim
19 words
Display means according to claim 1, wherein said curved face has variable optical power depending on the azimuthal angle.
Claim 5
Dependent Claim
40 words
Display means according to claim 1, satisfying a condition |α| 20 ° wherein a is the angle between the tangential line to said curved face at the vertex thereof and a line perpendicular to the optical axis of the eye.
Claim 6
Dependent Claim
31 words
Display means according to claim 1, further comprising: illumination means for illuminating the eye; and light-receiving means for receiving the light reflected from the eye, for detecting the visual line thereof.
Claim 7
Dependent Claim
29 words
Display means according to claim 5, further comprising: control means for controlling the display state of said display means, according to the light receiving state of said photosensor means.
Claim 8
Dependent Claim
14 words
Display means according to claim 2, wherein said reflecting face is a half-transmitting face.
Claim 9
Dependent Claim
19 words
Display means according to claim 2, wherein said reflecting face has variable optical power depending on the azimuthal angle.
Claim 10
Dependent Claim
95 words
A display device comprising: information forming means for forming an information; optical means for guiding a light of said information forming means to an eye, in which said optical means have a reflecting curved face decentered having a positive optical power; illuminating means for illuminating said eye; converging means for converging a light of said illuminating means reflected from said eye; and detecting means for receiving a light from said converging means to detect a state of said eye; wherein where an imaging magnification of said converging means is ;8, a following condition is satisfied,
Claim 11
Dependent Claim
95 words
A display device comprising: information forming means for forming an information; optical means for guiding a light of said information forming means to an eye, in which said optical means have a reflecting curved face decentered having a positive optical power; illuminating means for illuminating said eye; converging means for converging a light of said illuminating means reflected from said eye; and detecting means for receiving a light from said converging means to detect a state of said eye; wherein where an imaging magnification of said converging means is ;8, a following condition is satisfied,
Claim 12
Dependent Claim
21 words
A display device according to claim 9, wherein said reflecting curved face has variable optical power depending on the azimuthal angle.
References Cited (Backward Citations)
US4081209A
Cited
JPS5878116A
Cited
US4969972A
Cited
JPH01274736A
Cited
JPH02297516A
Cited
US4969724A
Cited
JPH0311492A
Cited
JPH03101709A
Cited
JPH03109029A
Cited
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