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US5066525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated glass panel incorporating hologram sheet
Assignee: Central Glass Co Ltd
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Filing: 1990-01-18
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Granted: 1991-11-19
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Expires: 2010-01-18
Abstract
Abstract The invention relates to a laminated glass panel incorporating therein a hologram sheet. For example, the laminated glass panel is a vehicle windshield in which the hologram sheet is used as a combiner of a head-up display. As adhesive means, the laminated glass panel uses either one sheet or two sheets of polyvinyl butyral resin (PVB) film. In the former case the hologram sheet is interposed between the PVB film and one of the glass plate and shielded from the PVB film by a transparent resin or glass film which prevents the plasticizer contained in the PVB film from transferring to the hologram sheet. In the latter case the hologram sheet is interposed between the two sheets of PBB film and shielded from each PVB film by a transparent resin or glass film having the aforementioned property. By virtue of the shielding of the hologram sheet from the PVB film, the diffraction wavelength of the hologram sheet does not significantly shift from the aimed wavelength. To prevent blurring of the holographic images, it is preferable that each transparent film for the shielding purpose has a very smooth surface at least on the side facing the PVB film.
Inventors
- 👤 Fumihiko Nakamachi
- 👤 Masanori Umebayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:05
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; B32B17/10009; B32B17/10036; B44; B44F; B44F1/00; B44F1/02; G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B27/0103; G03; G03H; G03H1/00; G03H1/02; G03H1/0252; G02B2027/0112; G02B2027/0116; G02B2027/0118; G02B2027/012; G03H1/04; G03H1/18; G03H2001/186; G03H1/22; G03H1/2202; G03H2001/2223; G03H2001/2231; G03H2250/00; G03H2250/37; G03H2250/39; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31627; Y10T428/3163; Y10T428/31721; Y10T428/31725; Y10T428/31786; Y10T428/31855; Y10T428/31859
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
A laminated glass panel, comprising: two transparent glass plates arranged opposite and parallel to each other; a polyvinyl butyral resin film which contains a plasticizer and is interposed between the two glass plates as adhesive means; a hologram sheet interposed between said polyvinyl butyral resin film and one of the two glass plates; and a transparent film which is tightly interposed between said hologram sheet and said polyvinyl butyral resin film so as to shield said hologram sheet from said polyvinyl butyral resin and prevents said plasticizer from transferring from said polyvinyl butyral resin film to said hologram sheet, wherein the surface roughness of said transparent film is not more than 2 μm at least on the side facing said polyvinyl butyral resin film.
Claim 2
Dependent Claim
124 words
A laminated glass panel, comprising: two transparent glass plates arranged opposite and parallel to each other; a polyvinyl butyral resin film which contains a plasticizer and is interposed between the two glass plates as adhesive means; a hologram sheet interposed between said polyvinyl butyral resin film and one of the two glass plates; and a transparent film which is tightly interposed between said hologram sheet and said polyvinyl butyral resin film so as to shield said hologram sheet from said polyvinyl butyral resin and prevents said plasticizer from transferring from said polyvinyl butyral resin film to said hologram sheet, wherein the surface roughness of said transparent film is not more than 2 μm at least on the side facing said polyvinyl butyral resin film.
Claim 3
Dependent Claim
19 words
A laminated glass panel according to claim 1, wherein the material of said transparent film is a synthetic resin.
Claim 4
Dependent Claim
45 words
A laminated glass panel according to claim 2, wherein said synthetic resin is selected from the group consisting of polyester resins, polycarbonate resins, acrylic resins, polyethylene resins, polyimide resins, polyamide resins, polyvinyl alcohol resins, polypropylene resins, polybutene resins, polyacrylonitrile resins, polymethylpentene resins and ionomer resins.
Claim 5
Dependent Claim
19 words
A laminated glass panel according to claim 1, wherein the material of said transparent film is an inorganic glass.
Claim 6
Dependent Claim
124 words
A laminated glass panel according to claim 1, further comprising another polyvinyl butyral resin film which contains a plasticizer and is interposed as supplementary adhesive means between said polyvinyl butyral resin film and said one of the glass plates so as to interpose said hologram sheet between the two polyvinyl butyral resin films, and another transparent film whose surface roughness is not more than 2 μm at least on the side facing said another polyvinyl butyral resin film which is tightly interposed between said hologram sheet and said another polyvinyl butyral resin film so as to shield said hologram sheet from said another polyvinyl butyral resin film and prevents the plasticizer in said another polyvinyl butyral resin film from transferring to said hologram sheet.
Claim 7
Dependent Claim
24 words
A laminated glass panel according to claim 5, wherein the material of said transparent film and said another transparent film is a synthetic resin.
Claim 8
Dependent Claim
45 words
A laminated glass panel according to claim 6, wherein said synthetic resin is selected from the group consisting of polyester resins, polycarbonate resins, acrylic resins, polyethylene resins, polyimide resins, polyamide resins, polyvinyl alcohol resins, polypropylene resins, polybutene resins, polyacrylonitrile resins, polymethylpentene resins and ionomer resins.
Claim 9
Dependent Claim
24 words
A laminated glass panel according to claim 5, wherein the material of said transparent film and said another transparent film is an inorgnic glass.
Claim 10
Dependent Claim
17 words
A laminated glass panel according to claim 1, wherein said hologram sheet is a reflection hologram sheet.
References Cited (Backward Citations)
US4842389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |