US6283597B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and facility for light-beam projection of images on a screen
Assignee: Infitec GmbH
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Filing: 1998-04-28
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Granted: 2001-09-04
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Expires: 2018-04-28
Abstract
Abstract In a process for the projection of images on a screen ( 20 ) by means of a light bundle, an individual projector ( 40 ) is provided for projecting the images, wherein the light bundle used for projection is emitted from a light source ( 12, 12 ′) in the projector ( 40 ) whose light has at least one spectral peak in the visible wavelength range with a half-width of less than 100 nm, especially less than 30 nm, and observers of the image are given eyeglasses ( 24, 24 ′) which have a wavelength-dependent transmission function such that light in the wavelength range of at least one spectral peak or, if more than one spectral peak, in the wavelength range of at least one of these spectral peaks passes through each eyeglass ( 24, 24 ′), and the light intensity for light with wavelengths beyond this spectral peak or spectral peaks is reduced.
Inventors
- 👤 Helmut Jorke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:56
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3129; G; G02; G02B; G02B30/00; G02B30/20; G02B30/22; G02B30/23; G02B30/24; G02B30/34; G02B30/35; G03; G03B; G03B35/00; G03B35/18; G03B35/20; H04N13/00; H04N13/30; H04N13/324; H04N13/332; H04N13/334; H04N13/363; H04N13/10; H04N13/194; H04N13/20; H04N13/286; H04N13/302; H04N13/337; H04N13/341; H04N13/361; H04N13/388; H04N13/398; H04N19/00; H04N19/50; H04N19/597
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
148 words
A process for the projection of images on a screen by a light bundle, comprising: providing an individual projector for projecting the images; providing three monochromatic light sources in the projector for emitting light bundles of different colors used for projection, the light of each of the light bundles having a spectral peak in the visible wavelength range with a half-width of less than 100 nm; observers of the image using eyeglasses which have a wavelength-dependent transmission function such that light in the wavelength range of the spectral peak of at least one of said light bundles passes through each eyeglass; and reducing, with use of said eyeglasses, the light intensity for light with wavelengths beyond the spectral peaks of the light bundles of different colors so as to filter out almost all spectral components of ambient light, especially sunlight, to increase the contrast of the image projection.
Claim 2
Dependent Claim
148 words
A process for the projection of images on a screen by a light bundle, comprising: providing an individual projector for projecting the images; providing three monochromatic light sources in the projector for emitting light bundles of different colors used for projection, the light of each of the light bundles having a spectral peak in the visible wavelength range with a half-width of less than 100 nm; observers of the image using eyeglasses which have a wavelength-dependent transmission function such that light in the wavelength range of the spectral peak of at least one of said light bundles passes through each eyeglass; and reducing, with use of said eyeglasses, the light intensity for light with wavelengths beyond the spectral peaks of the light bundles of different colors so as to filter out almost all spectral components of ambient light, especially sunlight, to increase the contrast of the image projection.
Claim 3
Dependent Claim
23 words
The process of claim 1 , wherein said one spectral peak in the visible range has a half-width of less than 30 nm.
Claim 4
Independent Claim
146 words
A system with an individual projector for displaying an image on a screen by a light bundle for carrying out a process, comprising: a projector for projecting images; at least three monochromatic light sources in the projector which emit light bundles of different colors and the light of each of the light bundles has a spectral peak in the visible wavelength range with a half-width of less than 100 nm; eyeglasses with filters for which a wavelength-dependent transmission function is provided such that light in the wavelength range of at least one of said light bundles spectral peak passes through each eyeglass; and wherein the light intensity is reduced by said eyeglass filters for light with wavelengths beyond the spectral peaks of the light bundles of different colors so that large spectral components of ambient light, especially sunlight, are filtered out to increase the image contrast.
Claim 5
Independent Claim
146 words
A system with an individual projector for displaying an image on a screen by a light bundle for carrying out a process, comprising: a projector for projecting images; at least three monochromatic light sources in the projector which emit light bundles of different colors and the light of each of the light bundles has a spectral peak in the visible wavelength range with a half-width of less than 100 nm; eyeglasses with filters for which a wavelength-dependent transmission function is provided such that light in the wavelength range of at least one of said light bundles spectral peak passes through each eyeglass; and wherein the light intensity is reduced by said eyeglass filters for light with wavelengths beyond the spectral peaks of the light bundles of different colors so that large spectral components of ambient light, especially sunlight, are filtered out to increase the image contrast.
Claim 6
Dependent Claim
24 words
The system of claim 3 , wherein said one spectral peak in the visible wavelength range has a half-width of less than 30 nm.
Claim 7
Dependent Claim
49 words
The system according to claim 3 , said eyeglasses are arranged in a spectacle frame which is adapted to a head of an observer and wherein the spectacle frame is provided with a shield against light which prevents light from falling between the eyeglasses and eyes of the observer.
Claim 8
Dependent Claim
25 words
The system according to claim 3 , wherein the light bundle has at least three spectral peaks and the eyeglass is transmitting for its wavelengths.
Claim 9
Dependent Claim
37 words
The system according to claim 6 , wherein the light source emits light with spectral peaks of suitable intensity and centroid wavelengths so that it can be made physiologically detectable as the color white through the eyeglass.
Claim 10
Dependent Claim
74 words
The system according to claim 6 , wherein a control device is provided for the display of a video image, by which the intensities of the spectral peaks in the light bundle are controllable independent from one another, and wherein the light source is configured for a position of the spectral peaks in the wavelength spectrum in which a light bundle whose light is physiologically detectable as white can be generated by this control.
Claim 11
Dependent Claim
48 words
The system according to claim 6 , wherein the light source has at least three lasers for generating partial light bundles of different colors and has an optical system which unifies the light of the partial light bundles to form the common light bundle of the light source.
Claim 12
Dependent Claim
65 words
The system according to claim 3 , wherein two eyeglasses arranged in a spectacle frame are provided, wherein the spectral transmission functions of the eyeglasses have different transmission ranges, and wherein the light bundle exiting from the projector has a spectrum which covers the transmission ranges of both eyeglasses, so that different image information for stereoscopic image display can be allocated to the two eyeglasses.
Claim 13
Dependent Claim
52 words
The system according to claim 10 , for displaying stereoscopic video images, wherein the light bundle has a diameter suitable for imaging individual image points of the video image and a deflection device is provided which deflects the entire light bundle which is acted upon spectrally by the information for both eyes.
Claim 14
Dependent Claim
23 words
The system according to claim 2 , wherein a dielectric coating system which determines the wavelength-dependent transmission function is provided on the eyeglass.
Claim 15
Dependent Claim
13 words
The system of claim 3 , wherein said filters are dielectric interference filters.
Claim 16
Dependent Claim
12 words
The system of claim 3 , wherein said filters are Fabry-Perot filters.
Claim 17
Dependent Claim
13 words
The system of claim 3 , wherein said filters are metal-dielectric interference filters.
References Cited (Backward Citations)
DE473343C
Cited
US4158133A
Cited
US4641178A
Cited
US4623219A
Cited
JPH01116521A
Cited
US5537476A
Cited
DE19503929A1
Cited
US5808222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-09-03 | 2005-03-05 | 2005-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-09-03 | 2009-03-05 | 2009-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-09-03 | 2013-03-05 | 2013-09-04 | $7700.00 | Window Closed / Lapsed |