US5793358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for managing a luminescent laptop keyboard
Assignee: Lenovo Singapore Pte Ltd
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Filing: 1997-01-14
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Granted: 1998-08-11
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Expires: 2017-01-14
Abstract
Abstract A method and means for flash charging a plurality of phosphorescent-coated, touch-sensitive keys using a planar, light-transmissive multicolor liquid crystal display (LCD) where the tripping event is the position of a lid of the notebook within a critical angle of the base.
Inventors
- 👤 Dragutin Petkovic
- 👤 Edwin Joseph Selker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:22
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F1/00; G06F1/16; G06F1/1613; G06F1/1615; G06F1/1616; G06F1/1633; G06F1/1662; G06F1/1675; G06F1/1677
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
145 words
A method for flash charging a plurality of phosphorescent-coated, touch-sensitive keys (211) operable as an information entry means of a notebook-type computer (201) residing within a base (207), said computer further including processing means also residing within said base for electrically and logically operating a planar, light-transmissive multicolor liquid crystal display (LCD), said LCD (209) being set within a lid (203) and rotationally coupling (205) the base, comprising the steps of: (a) rotating the lid such that the LCD lies within an acute dihedral angle x opposing the plurality of keys set within the base in the range 0<x<A degrees, where A is a predetermined value; and (b) causing the LCD responsive to the rotation of the lid as in step (a) to display and project a colored light (215) within an appropriate spectral-charging region upon the phosphorescent-coated keys for a predetermined period of time.
Claim 2
Independent Claim
145 words
A method for flash charging a plurality of phosphorescent-coated, touch-sensitive keys (211) operable as an information entry means of a notebook-type computer (201) residing within a base (207), said computer further including processing means also residing within said base for electrically and logically operating a planar, light-transmissive multicolor liquid crystal display (LCD), said LCD (209) being set within a lid (203) and rotationally coupling (205) the base, comprising the steps of: (a) rotating the lid such that the LCD lies within an acute dihedral angle x opposing the plurality of keys set within the base in the range 0<x<A degrees, where A is a predetermined value; and (b) causing the LCD responsive to the rotation of the lid as in step (a) to display and project a colored light (215) within an appropriate spectral-charging region upon the phosphorescent-coated keys for a predetermined period of time.
Claim 3
Dependent Claim
17 words
The method according to claim 1, wherein the range of angles lies between zero and 15 degrees.
Claim 4
Dependent Claim
64 words
The method according to claim 1, wherein the step of rotating the lid includes the step selected from a set consisting of rotating the lid from a position of closure with and away from the base but within the critical angle, and rotating the lid from a position greater than the critical angle toward the base so as to lie within the critical angle.
Claim 5
Dependent Claim
34 words
The method according to claim 1, wherein the step of causing the LCD to display and project colored light includes the step of causing the LCD to display and project substantially white (polychromatic) light.
Claim 6
Dependent Claim
143 words
In a computer of the notebook type including a planar, light-transmissive multicolor liquid crystal display (LCD) set within a lid and rotationally coupling a base, and information entry and processing means residing within said base for electrically and logically operating said LCD, said information entry means forming a matrix of actuable touch-sensitive keys or the like and coated with phosphorescent information indicia on counterpart ones of the keys, the combination comprising: first means responsive to positioning the lid to lie within a predetermined acute dihedral angle formed by the lid and the base for causing said LCD to illuminate said phosphorescent information indicia for a predetermined time interval and for signaling completion of such process; and second means responsive to the completion of such process for engaging the processing means for causing the computer to transition to a prior or default information state.
Claim 7
Dependent Claim
143 words
In a computer of the notebook type including a planar, light-transmissive multicolor liquid crystal display (LCD) set within a lid and rotationally coupling a base, and information entry and processing means residing within said base for electrically and logically operating said LCD, said information entry means forming a matrix of actuable touch-sensitive keys or the like and coated with phosphorescent information indicia on counterpart ones of the keys, the combination comprising: first means responsive to positioning the lid to lie within a predetermined acute dihedral angle formed by the lid and the base for causing said LCD to illuminate said phosphorescent information indicia for a predetermined time interval and for signaling completion of such process; and second means responsive to the completion of such process for engaging the processing means for causing the computer to transition to a prior or default information state.
Claim 8
Dependent Claim
53 words
The combination according to claim 5, wherein the first means include means responsive to rotation of said lid from a closed position to within the predetermined acute dihedral angle when the computer is initially powered on and rotation from a position greater than the critical angle to a position within said critical angle.
Claim 9
Dependent Claim
35 words
The combination according to claim 5, wherein the first means include monitor means responsive to any execution of a predetermined pattern of keystrokes when the computer is in a powered on and computational processing state.
Claim 10
Dependent Claim
30 words
The combination according to any one of the claims 6 through 7, wherein the acute dihedral angle lies in a range greater than zero degrees and less than 15 degrees.
Claim 11
Dependent Claim
21 words
The combination according to claim 5, wherein said coating phosphoresces within a predetermined spectral range after exposure to LCD-generated white light.
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) | 2001-08-10 | 2002-02-09 | 2002-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-10 | 2006-02-09 | 2006-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-10 | 2010-02-09 | 2010-08-11 | $7700.00 | Window Closed / Lapsed |