Browse Prior Art Database

Connector/Hinge for Laptop Computer Liquid Crystal Display

IP.com Disclosure Number: IPCOM000107264D
Original Publication Date: 1992-Feb-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 4 page(s) / 151K

Publishing Venue

IBM

Related People

Jensen, DJ: AUTHOR

Abstract

Illustrated in Fig. 1 is a conceptual design of a hinge/connector mechanism which can be used for portable computers. This design differs from current hinges used on laptop computers because it eliminates the need to use wires in the connection of the Liquid Crystal Display (LCD) to the computer. In addition, it eliminates the need for a multiple part tilt mechanism which is needed to maintain the display of the laptop at various tilt angles. Existing hinges make no provisions for the wires required for the LCD and because of this, the wires get flexed every time the LCD is opened and adjusted. Also, based on current hinge designs, these wires may also be pinched, which is further damaging to the wires.

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Connector/Hinge for Laptop Computer Liquid Crystal Display

       Illustrated in Fig. 1 is a conceptual design of a
hinge/connector mechanism which can be used for portable computers.
This design differs from current hinges used on laptop computers
because it eliminates the need to use wires in the connection of the
Liquid Crystal Display (LCD) to the computer.  In addition, it
eliminates the need for a multiple part tilt mechanism which is
needed to maintain the display of the laptop at various tilt angles.
Existing hinges make no provisions for the wires required for the LCD
and because of this, the wires get flexed every time the LCD is
opened and adjusted.  Also, based on current hinge designs, these
wires may also be pinched, which is further damaging to the wires.

      Fig. 1A shows an assembly drawing of the key parts of the
proposed hinge.  The stationary contact spool is a molded hollow
cylinder for which electrical contacts are plated radially around the
outside of the cylinder.  The length of the contact spool is
dependent upon the number of wires required for the LCD and the
number of hinges used. The spool shown in the figure is approximately
55 mm in length and has 23 radial contacts based on the number of
wires required for the LCD.  The radial contacts are plated only 300
degrees around the spool so that space is available to attach the
wires from the computer to the spool.  These wires can be in the form
of a ribbon cable or a flex cable and can vary with design.  Located
on both ends of the contact spool is a flange which allows for the
positioning of the spool into the contact housing.  The contact
housing is also a molded part, and its primary function is to retain
the spring contacts which the figure shows already installed into the
housing.  Without the spring contacts installed, the contact housing
has a number of retention pockets molded into it which correspond to
the radial contacts on the stationary contact spool.  At both ends of
each pocket is a notch for retaining the contact spring.  The design
of the contact housing is such that the material between the pockets
prohibits the spring contacts from touching one another.  The housing
also fits around the contact spool in a manner to eliminate foreign
matter, such as dust, from collecting on the contacts.  As an
additional purpose, the contact housing also provides a means for
maintaining the LCD position.  This is done with the ring gear which
is molded in the part and shown in the figure on the left of the
contact housing.  The pitch circle and width of the teeth are
dependent upon the desired incremental LCD tilt angle.  A ball (not
shown) which will be preloaded by a small spring (not shown) located
in the left end of the contact spool will ride between the gear teeth
and, therefore, apply a resisting force against rotating the hinge.
Because the LCD will require a force to keep it in place that varies
as a function of its position, t...