Patent US6050494A successfully refreshed from Google Patents.
US6050494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smart card
Assignee: Samsung Display Co Ltd
•
Filing: 1998-06-04
•
Granted: 2000-04-18
•
Expires: 2018-06-04
Abstract
Abstract A smart card includes a transparent circuit board on which an integrated circuit, function switches, a power source, and other parts are mounted, an upper substrate facing the circuit board, upper and lower electrodes respectively located on facing surfaces of upper substrate and the circuit board, orthogonal to each other, orientation films coating the upper and lower electrodes, and a liquid crystal material located and sealed between the upper and lower electrodes.
Inventors
- 👤 Man-gon Song
- 👤 Si-han Kim
- 👤 Seung-bae Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:58
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0701; G06K19/0702; G06K19/0704; G06K19/077; G06K19/07701; G06K19/07703; G02; G02F; G02F1/00; G02F1/01; G02F1/13
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A smart card including: a transparent circuit board on which an integrated circuit, function switches, a power source, and other parts are mounted; an upper substrate mounted facing the circuit board; upper and lower electrodes respectively located on facing surfaces of the upper substrate and the circuit board and orthogonal to each other; orientation films coating the upper and lower electrodes; and a liquid crystal material located in the space and sealed between the upper and lower electrodes.
Claim 2
Dependent Claim
78 words
A smart card including: a transparent circuit board on which an integrated circuit, function switches, a power source, and other parts are mounted; an upper substrate mounted facing the circuit board; upper and lower electrodes respectively located on facing surfaces of the upper substrate and the circuit board and orthogonal to each other; orientation films coating the upper and lower electrodes; and a liquid crystal material located in the space and sealed between the upper and lower electrodes.
Claim 3
Dependent Claim
43 words
The smart card as claimed in claim 1, wherein the circuit board includes: a substrate plate; a gas barrier layer on the substrate plate to prevent gas from passing through the substrate plate; and an electrode attaching layer on the gas barrier layer.
Claim 4
Dependent Claim
20 words
The smart card as claimed in claim 2, wherein the substrate plate is a flexible thin glass plate containing borosilicate.
Claim 5
Dependent Claim
17 words
The smart card as claimed in claim 2, wherein the upper and lower substrates are transparent plastic.
Claim 6
Dependent Claim
45 words
The smart card as claimed in claim 1, comprising: an upper polarization plate attached to an outside surface of the upper substrate; and a frame with a recess in which a lower polarization plate is located, attached to a lower surface of the circuit board.
Claim 7
Dependent Claim
21 words
The smart card as claimed in claim 1, comprising a reflective plate located on a lower surface of the circuit board.
Claim 8
Dependent Claim
16 words
The smart card as claimed in claim 6, wherein the reflective plate is an aluminum film.
Claim 9
Dependent Claim
14 words
The smart card as claimed in claim 1, wherein the lower electrodes are reflective.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-18 | 2003-10-18 | 2004-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-18 | 2007-10-18 | 2008-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-18 | 2011-10-18 | 2012-04-18 | $7700.00 | Window Closed / Lapsed |