EP0202460A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Display systems for vehicle
Assignee: Yazaki Corp
•
Filing: 1986-04-11
•
Granted: —
•
Expires: 2006-04-11
Abstract
Abstract @ A display system according to the present invention is provided with a projective display unit for projecting a display image of a display device which displays various data, onto a front glass of the vehicle and forming a virtual image of the display image in front of the front glass, and a position adjusting means for adjusting the position of the virtual image formed in front of the front glass by shifting a projective optical axis of the display image extending to the front glass, whereby the whole surface of the front glass in front of the driver can be utilized as a display image projection surface and hence the virtual image of the display image can be formed in a desired position aligned with the line of vision of the driver without obstructing the front sight of the driver.
Inventors
- 👤 Tadashi 1500 Mishuku Iino
- 👤 Yoshikazu 1500 Mishuku Nagashima
- 👤 Masaya 1500 Mishuku Sugita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; B; B60; B60K; B60K35/00; B60K35/20; B60K35/21; B60K35/22; G02B27/0101; B60K2360/00; B60K2360/20; B60K2360/33; B60K2360/334; G02B2027/0118; G02B27/0149; G02B2027/0154; G02B2027/0156; G02B2027/0165; G02B27/0179; G02B2027/0187
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
95 words
A display system for a vehicle, including: a projective display means mounted on the vehicle and having a display device for displaying various data, said projective display means functioning to project a display image of said display device onto a front glass of the vehicle thereby forming a virtual image of said display image in front of the front glass; and a position adjusting means for adjusting the position of the virtual image formed in front of the front glass by shifting a projective optical axis from said projective display means to the front glass.
Claim 2
Dependent Claim
95 words
A display system for a vehicle, including: a projective display means mounted on the vehicle and having a display device for displaying various data, said projective display means functioning to project a display image of said display device onto a front glass of the vehicle thereby forming a virtual image of said display image in front of the front glass; and a position adjusting means for adjusting the position of the virtual image formed in front of the front glass by shifting a projective optical axis from said projective display means to the front glass.
Claim 3
Dependent Claim
62 words
A display system according to claim 1, wherein said projective display means further has a rotatably supported housing which houses said display device therein, and said position adjusting means has an electric motor for rotating said housing, a projective display position of the display image onto the front glass being changed with the rotation of said housing driven by said electric motor.
Claim 4
Dependent Claim
60 words
A display system according to claim 2, wherein said housing has an opening for projecting the display image of said display device onto the front glass, and in said opening there is provided a display element for projecting on the front glass a projective position indicating image which indicates the position of the display image projected on the front glass.
Claim 5
Dependent Claim
43 words
A display system according to claim 3, wherein said display element is provided along an edge portion of said opening to form frame-like projective position indicating image which surrounds the virtual image of the display image formed in front of the front glass.
Claim 6
Dependent Claim
74 words
A display system according to claim 1, wherein said projective display means has a rotatably supported reflecting member which reflects the display image of said display device to project it onto the front glass, and said position adjusting means has an electric motor for rotating said reflecting member, a projective display position of the display image onto the front glass being changed with the rotation of said reflecting member drived by said electric motor.
Claim 7
Dependent Claim
74 words
A display system according to claim 1, further including a display element for projecting on the front glass a projective position indicating image which indicates the position of the display image projected from said projective display means onto the front glass, the position of the projective position indicating image projected from said display element onto the front glass being changed with the movement of the projective optical axis effected by said position adjusting means.
Claim 8
Dependent Claim
121 words
A display system according to claim 1, wherein said position adjusting means includes: an operating member which indicates a shifting direction of the projective optical axis of the display image; an electric motor for shifting the projective optical axis of the display image; a restriction member for restricting a shifting range of the projective optical axis; a limit position detecting means which detects a limit position of said shifting range on the basis of an electric current flowing in said electric motor; and a control means which drives said electric motor in a direction opposite to the previous direction for a predetermined period of time in response to the detection of the limit position effected by said limit position detecting means.
Claim 9
Dependent Claim
44 words
A display system according to claim 1, wherein said projective display means is further provided with an optical system for projecting the display image of said display device onto the front glass, said display device being disposed within a focus of said optical system.
Claim 10
Dependent Claim
48 words
A display system according to claim 8, wherein said projective display means is further provided with a reflecting mirror disposed between said display device and said optical system for reflecting the display image of the display device to project it onto the front glass through the optical system.
Claim 11
Dependent Claim
93 words
A display system according to claim 8, further including: an external light detecting means for detecting an external light incident from the exterior through said optical system, said external light detecting means outputting an electrical signal proportional to the magnitude of the external light; and a means for preventing an external light from being incident on said display device through said optical system when the level of the external light incident through said optical system is above a predetermined value, in accordance with the electrical signal provided from said external light detecting means.
Claim 12
Dependent Claim
27 words
ll. A display system according to claim 10, wherein said preventing means is constituted by a shutter plate disposed between said optical system and said display device.
Claim 13
Dependent Claim
74 words
A display system according to claim 10, wherein said external light detecting means comprises: a half mirror disposed inclinedly at a predetermined angle between said optical system and said display device; and a light detecting element which receives a portion of the external light incident from the exterior through said optical system and reflected by said half mirror, said light detecting element outputting an electrical signal proportional to the magnitude of the external light.
Claim 14
Dependent Claim
47 words
A display system according to claim 1, wherein said display device is a light transmission type display device comprising a liquid crystal display cell and a light source which emits light so that the light is incident from a rear face of said liquid crystal display cell.
Claim 15
Dependent Claim
20 words
A display system according to claim 13, wherein said liquid crystal display cell effects a negative or positive display selectively.
Claim 16
Dependent Claim
45 words
A display system according to claim 13, wherein said light source comprises two light sources, one being for a high luminance and the other for a low luminance, and said display device further includes a change-over switch for selecting one of said two light sources.
Claim 17
Dependent Claim
35 words
A display system according to claim 15, wherein said change-over switch is interlocked with a lighting switch of the vehicle to select the light source for a high luminance when said lighting switch is ON.
Claim 18
Dependent Claim
38 words
A display system according to claim 13, wherein said display device further includes a heat protecting means for preventing a rise in temperature of said liquid crystal display cell induced by the heat generated from said light source.
Claim 19
Dependent Claim
80 words
A display system according to claim 1, wherein said projective display means is further provided with an optical system for projecting the display image of said display device onto the front glass, and said display device is a light transmission type display device comprising a liquid crystal display cell disposed within a focus of said optical system and a light source which emits light so that the light is incident from a rear face of said liquid crystal display cell.
Claim 20
Dependent Claim
59 words
A display system according to claim 18, wherein said display device is disposed between said liquid crystal display cell and said light source and is further provided with a diffusion plate for diffusion the light from said light source toward the rear face of said liquid crystal display cell, said diffusion plate being formed from a light transmissible material.
Claim 21
Dependent Claim
70 words
A display system according to claim 18, wherein said display device is further provided with a reflecting mirror disposed between said liquid crystal display cell and said light source for reflecting the light from said light source toward the rear face of said liquid crystal display cell and a diffusion plate sticked to a reflection surface of said reflecting mirror, said diffusion plate being formed from a light transmissible material.
Claim 22
Dependent Claim
43 words
A display system according to claim 1, wherein said front glass has a curvature, said display system further comprising a distortion correcting means for correcting a distortion of the virtual image of the display image caused by the curvature of the front glass.
Claim 23
Dependent Claim
58 words
A display system according to claim 21, wherein said distortion correcting means is constituted by a reflecting mirror having a reflection characteristic opposite to that based on the curvature of the front glass, said reflecting mirror functioning to reflect the display image of the display device in said projective display device to project it onto the front glass.
Claim 24
Dependent Claim
102 words
A display system for a vehicle, including: a front glass of the vehicle; and a projective display unit, said projective display unit having a display device for displaying various data concerning the vehicle, an optical system for projecting a display image of said display device onto said front glass of the vehicle, and a case which houses therein said display device and said optical system, said projective display unit being disposed inside an instrument panel of the vehicle and projecting the display image onto the front glass through an opening formed in a dash board located in front of the instrument panel.
Claim 25
Dependent Claim
102 words
A display system for a vehicle, including: a front glass of the vehicle; and a projective display unit, said projective display unit having a display device for displaying various data concerning the vehicle, an optical system for projecting a display image of said display device onto said front glass of the vehicle, and a case which houses therein said display device and said optical system, said projective display unit being disposed inside an instrument panel of the vehicle and projecting the display image onto the front glass through an opening formed in a dash board located in front of the instrument panel.
Claim 26
Dependent Claim
78 words
A display system according to claim 23, wherein said case is rotatably supported in a space formed inside the instrument panel, and there are further provided an electric motor for rotating said case and an operating means provided on the instrument panel for rotating said electric motor in a forward or reverse direction selectively, the position of the display image projected from said projective display unit onto the front glass being changed by opertation of said operating means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.