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Patent US5539552A successfully refreshed from Google Patents.
US5539552A
Expired / Lapsed
US
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Protective member for display system having 99% UV light blocking ability and improved thermal coefficient of expansion
Assignee: First National Bank of Chicago
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Filing: 1995-04-20
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Granted: 1996-07-23
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Expires: 2015-04-20
Abstract
Abstract A protective member for a display device such as an LCD display mounted in a display system provides protection to the display device against ultraviolet light and shock. In one embodiment, the protective member is mounted between the display device and at least one source of light energy which includes both ultraviolet light energy and visible light energy. In another embodiment, the protective member is used to actually fabricate the display device. The protective member blocks generally all of the ultraviolet light energy which has a wavelength of between 200 to 390 nanometers, while transmitting at least 90 percent of the visible light energy having a wavelength greater than approximately 410 nanometers. The protective member has a thermal coefficient of expansion (TCE) of between 45×10 -7 /° C. and 60×10 -7 /° C., so as to be useable with present day manufacturing processes for such display devices.
Inventors
- 👤 Bhupendrarai C. Desai
- 👤 John Doyle
- 👤 Michael J. Giuglianotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F2201/00; G02F2201/50; G02F2201/503
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
132 words
A protective member for a display member in a display system, comprising: a protective member disposed proximate a display member, between said display member and at least a first source of light energy, said light energy including ultraviolet light energy and visible light energy, said protective member blocking generally at least 99 percent of said ultraviolet light energy having a light energy wavelength of less than 400 +/-10 nanometers, and transmitting at least 80 percent of said visible light energy having a light energy wavelength greater than 410 +/-10 nanometers, and transmitting at least 90 percent of said visible light energy having a light energy wavelength greater than 420 +/-10 nanometers; and said protective member having a thermal coefficient of expansion of between 40×10 -7 /° C. and 60×10 -7 /° C.
Claim 2
Dependent Claim
132 words
A protective member for a display member in a display system, comprising: a protective member disposed proximate a display member, between said display member and at least a first source of light energy, said light energy including ultraviolet light energy and visible light energy, said protective member blocking generally at least 99 percent of said ultraviolet light energy having a light energy wavelength of less than 400 +/-10 nanometers, and transmitting at least 80 percent of said visible light energy having a light energy wavelength greater than 410 +/-10 nanometers, and transmitting at least 90 percent of said visible light energy having a light energy wavelength greater than 420 +/-10 nanometers; and said protective member having a thermal coefficient of expansion of between 40×10 -7 /° C. and 60×10 -7 /° C.
Claim 3
Dependent Claim
21 words
The protective member of claim 1, wherein said protective member at least conforms to military specification MIL 85762A as to fluorescence.
Claim 4
Dependent Claim
18 words
The protective member of claim 1, wherein said light source is disposed in front of said display member.
Claim 5
Dependent Claim
16 words
The protective member of claim 1, wherein said light source is disposed behind said display member.
Claim 6
Dependent Claim
21 words
The protective member of claim 4 further including a heating member disposed proximate said light source disposed behind said display member.
Claim 7
Dependent Claim
15 words
The protective member of claim 1, wherein said display member includes front and back members.
Claim 8
Dependent Claim
20 words
The protective member of claim 6, wherein said protective member is bonded to said front member of said display member.
Claim 9
Dependent Claim
20 words
The protective member of claim 6, wherein said protective member is bonded to said back member of said display member.
Claim 10
Dependent Claim
17 words
The protective member of claim 8, further including at least one heating element proximate said back member.
Claim 11
Dependent Claim
18 words
The protective member of claim 6, wherein said protective member is said front member of said display member.
Claim 12
Dependent Claim
18 words
The protective member of claim 6, wherein said protective member is said back member of said display member.
Claim 13
Dependent Claim
20 words
The protective member of claim 6, wherein said protective member is mounted proximate said front member of said display member.
Claim 14
Dependent Claim
20 words
The protective member of claim 6, wherein said protective member is mounted proximate said back member of said display member.
Claim 15
Dependent Claim
16 words
The protective member of claim 1, wherein said display member includes an electronically activated display device.
Claim 16
Dependent Claim
17 words
The protective member of claim 14, wherein said electronically activated display device includes a liquid crystal display.
Claim 17
Dependent Claim
20 words
The protective member of claim 15, wherein said liquid crystal display device includes an active matrix liquid crystal display device.
Claim 18
Dependent Claim
17 words
The protective member of claim 14, wherein said electronically activated display device includes a twisted nematic display.
Claim 19
Dependent Claim
18 words
The protective member of claim 14, wherein said electronically activated display device includes a dichroic LCD display device.
Claim 20
Dependent Claim
13 words
The protective member of claim 1, wherein said protective member is shock resistant.
Claim 21
Dependent Claim
15 words
The protective member of claim 19, wherein said protective member is resistant to impact shock.
Claim 22
Dependent Claim
15 words
The protective member of claim 19, wherein said protective member is resistant to thermal shock.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-23 | 2000-01-22 | 2000-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-23 | 2004-01-22 | 2004-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-23 | 2008-01-22 | 2008-07-23 | $7700.00 | Window Closed / Lapsed |