Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
1998-06-01
2001-03-06
Feild, Lynn D. (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C248S919000
Reexamination Certificate
active
06198624
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to laptop computers, specifically to ergonomically designed laptop computers. Laptop computers were introduced to accommodate the mobile computing needs of people whose work environment is not fixed. Laptop computers (also called portable personal computers) are light and compact so that they can be easily transported from location to location.
Modern ergonomics theory and experience teaches us that improper posture of human bodies during the use of computers can produce many types of injuries. These are classified as repetitive, strain injuries. In an ergonomically arranged computer unit, the keyboard unit should be approximately at elbow level while the arms are parallel to the body, and the top of the display unit should be approximately at eye level, or at most 15 degrees below.
Most prior art laptop computers are not ergonomic. The display is permanently attached to the keyboard unit, and therefore there can be no adjustment of the height of the display over the keyboard. An exception is the ergonomic laptop computer presented in U.S. Pat. No. 5,729,429. In said patent, the height, angle and distance of the display can be adjusted over, with respect to and from the keyboard. However, in said patent, a rear display support is used to provide a stable base for the display. The rear display support adds to the manufacturing cost of the laptop computer and may also increase the thickness of the laptop computer when it is in a stored configuration, thus reducing its portability.
In the present invention, display positioning supports are presented that can be used to adjust the height, angle and distance of the display over, with respect to and from the keyboard, without increasing the size of the laptop when stored or transported
BRIEF SUMMARY OF THE INVENTION
The objective of the present invention is to provide an ergonomic laptop computer without compromising portability. Accordingly the preferred embodiment includes a main computer body with a keyboard unit, and a display unit. The height, distance and angle of the display unit can be adjusted by means of controllably extendable supportive members, pivotally attached to the main computer body and attached to the display unit. The overall stability of the laptop computer is ensured by either appropriately selecting its weight or by using members attached posteriorly to the main computer unit that can controllably slide in and out of said main computer unit. In another embodiment, the height, distance and angle of the display unit can be adjusted by means of a free standing controllably extendable support base.
REFERENCES:
patent: 5175672 (1992-12-01), Conner et al.
patent: 5196993 (1993-03-01), Herron
patent: 5218389 (1993-06-01), Harlom
patent: 5229920 (1993-07-01), Spaniol
patent: 5249103 (1993-09-01), Forsythe
patent: 5375076 (1994-12-01), Goodrich
patent: 5729429 (1998-03-01), Margaritis
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