US5657163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber optic illumination of HUD image source
Assignee: Delco Electronics LLC
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Filing: 1995-05-31
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Granted: 1997-08-12
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Expires: 2015-05-31
Abstract
Abstract The image source of a head up display for a motor vehicle is illuminated from a remote high intensity source using fiber optics. The HUD image source and optics are under the dash pad of the vehicle and include color LCD or color filtered image source. The image is lighted by a high intensity light source which yields a bright projected image and which generates substantial heat. The light source includes lamps in a fan-cooled heat sink located in the vehicle engine compartment, for example, and coupled to the image source by fiber optic light guides. The light guides abut the image source to uniformly light small image patterns commensurate with the light guide size, or light spreading techniques are used for larger image patterns.
Inventors
- 👤 Ning Wu
- 👤 I-Fu Shih
- 👤 Jerome R. Laskowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:12
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B6/00; G02B6/24; G02B6/42; G02B6/4298; G02B2027/0118; G02B27/0149; G02B2027/0169
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
A head up display for a vehicle comprising: an image source including a color filter pattern; optical means for projecting an image of the source into the field of view of a vehicle operator; and means for illuminating the image source comprising a light source remote from the image source and a plurality of fiber optic light guides between the light source and the image source for conducting light to the image source for illuminating the pattern; the light source comprising a lamp for illuminating an end of each light guide, a holder for securing each light guide in alignment with a corresponding lamp, and means for protecting the light guides from heat from the lamps; wherein the holder comprises a thermally conductive block having a parallel array of aligned apertures for securing light guides and lamps in alignment and spaced from one another, and an array of cooling apertures transverse to the aligned apertures for dissipating heat from the block.
Claim 2
Dependent Claim
161 words
A head up display for a vehicle comprising: an image source including a color filter pattern; optical means for projecting an image of the source into the field of view of a vehicle operator; and means for illuminating the image source comprising a light source remote from the image source and a plurality of fiber optic light guides between the light source and the image source for conducting light to the image source for illuminating the pattern; the light source comprising a lamp for illuminating an end of each light guide, a holder for securing each light guide in alignment with a corresponding lamp, and means for protecting the light guides from heat from the lamps; wherein the holder comprises a thermally conductive block having a parallel array of aligned apertures for securing light guides and lamps in alignment and spaced from one another, and an array of cooling apertures transverse to the aligned apertures for dissipating heat from the block.
Claim 3
Dependent Claim
26 words
The invention as defined in claim 1 wherein the means for protecting the light guides includes heat blocking glass between lamps and ends of light guides.
Claim 4
Dependent Claim
32 words
The invention as defined in claim 1 wherein the holder is thermally conductive and contains cooling apertures, and wherein the light source includes a fan for circulating cooling air about the holder.
Claim 5
Dependent Claim
71 words
The invention as defined in claim 1 wherein: the holder comprises a pair of spaced thermally conductive blocks, each block having a plurality of bores, each bore holding a light guide and a corresponding lamp; and the means for protecting the light guides from heat includes cooling passages in the blocks and a fan between the spaced blocks for circulating air through the passages to dissipate heat generated by the lamps.
Claim 6
Dependent Claim
126 words
A head up display for a vehicle comprising: an image source; optical means for projecting an image of the source into the field of view of a vehicle operator; and means for illuminating the image source comprising a light source remote from the image source and a plurality of fiber optic light guides between the light source and the image source for conducting light to the image source; the light source comprising a thermally conductive block having an array of apertures, a plurality of lamps and ends of the light guides respectively held in the apertures and aligned for illumination of each light guide by a lamp, means for protecting the light guides from heat from the lamps, and means for dissipating heat from the block.
Claim 7
Dependent Claim
126 words
A head up display for a vehicle comprising: an image source; optical means for projecting an image of the source into the field of view of a vehicle operator; and means for illuminating the image source comprising a light source remote from the image source and a plurality of fiber optic light guides between the light source and the image source for conducting light to the image source; the light source comprising a thermally conductive block having an array of apertures, a plurality of lamps and ends of the light guides respectively held in the apertures and aligned for illumination of each light guide by a lamp, means for protecting the light guides from heat from the lamps, and means for dissipating heat from the block.
Claim 8
Dependent Claim
22 words
The invention as defined in claim 5 wherein the means for dissipating heat from the block includes cooling apertures in the block.
Claim 9
Dependent Claim
39 words
The invention as defined in claim 5 wherein the means for dissipating heat from the block includes: cooling apertures in the block transverse to the array of apertures; and a fan for circulating cooling air through the cooling apertures.
Claim 10
Dependent Claim
31 words
The invention as defined in claim 5 wherein the means for protecting the light guides from heat includes heat blocking glass between the lamps and the ends of the light guides.
References Cited (Backward Citations)
US4158310A
Cited
US4210029A
Cited
US4322979A
Cited
US4322978A
Cited
US4547668A
Cited
US4620093A
Cited
US4588886A
Cited
US4589286A
Cited
US4687927A
Cited
US4781059A
Cited
US4805630A
Cited
US4795223A
Cited
US4961625A
Cited
USH1109H
Cited
US5138155A
Cited
US4973139A
Cited
US5170153A
Cited
US5127269A
Cited
US5275053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |