Liquid crystal cells – elements and systems – Particular structure – Holder – support – frame – or housing
Reexamination Certificate
2002-08-12
2004-11-09
Parker, Kenneth A (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Holder, support, frame, or housing
C361S689000
Reexamination Certificate
active
06816211
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a liquid crystal display, and more particularly to a liquid crystal display that prevents idling of a nut that is used for fixing the liquid crystal display to a supporter.
2. Discussion of the Related Art
FIG. 1
shows a plan view of a conventional liquid crystal display of a notebook personal computer, while
FIG. 2
is a section view of the liquid crystal display of
FIG. 1
taken along line A-A′. Generally, as shown in FIG.
1
and
FIG. 2
, a liquid crystal display in a notebook personal computer includes a main supporter
58
into which inserting nuts
54
are pressed. A backlight unit and a liquid crystal display panel are located inside the main supporter
58
. Additionally, a bottom cover
62
surrounds the bottom surface and the side surface of one side of the main supporter
58
. A top case
52
fixes the main supporter
58
and the liquid crystal display panel.
The main supporter
58
is a molded product formed with an internal stepped face. The backlight unit is on an internal bottom surface of the main supporter
58
. The backlight unit includes a light guide
10
, a reflective mirror
12
, upper and lower diffusion sheets
14
and
20
, upper and lower prism sheets
16
and
18
, and a lamp housing (not shown). A liquid crystal panel is disposed on the wall of the stepped face of the main supporter
58
. The liquid crystal panel is comprised of a liquid crystal that is injected between upper and lower substrates
2
and
4
, and attached polarizers
6
and
8
.
A lamp is in the lamp housing (not shown). That lamp housing is retained to the main supporter
58
by a screw. The lamp housing is electrically connected via a plug
60
to an inverter. The bottom cover
62
has a plane part and a side part that are bent perpendicularly to each other so as to enclose the bottom surface and a side surface of the main supporter
58
. A screw hole
62
a
through which a screw
56
passes is defined in the side of the bottom cover
62
. An inserting nut
54
is pressed into the side surface of the main supporter
58
. The top case
52
has a square-band shape with a plane part and a side part that are bent perpendicularly to each other. A screw hole
52
a
, through which the screw
56
passes, is defined in the side part of the top case
52
.
The liquid crystal module is fixed by means of screws
56
threaded into inserting nuts
54
. The left side (with reference to
FIG. 2
) of the liquid crystal module is fixed by a screw
56
that passes through a screw hole
52
a
of the top case
52
and that threads into an inserting nut
54
pressed into the main supporter
58
. The right side of the liquid crystal module is fixed by a screw
56
that passes through screw holes
52
a
and
62
a
and that threads into an inserting nut
54
that is pressed into the main supporter
58
.
In the conventional liquid crystal module, the inserting nut
54
is ideally vertically pressed into the side surface of the main supporter
58
. However, it often happens that the inserting nut
54
is obliquely pressed into the main supporter
58
. In that case, the inserting nut
54
and the screw
56
do not engage properly due to the inclination angle of the inserting nut
54
. If the inclination angle is severe enough the screw
56
and the inserting nut
54
are abraded when the screw
56
is tightened into the inserting nut
54
. If a conductive particle produced by this abrasion adheres to a bonded portion of a tape carrier package (TCP) of the liquid crystal display panel, an electrical short between electrodes can result. Furthermore, if the inclination angle prevents adequate tightening of the assembly, the screw
56
and the inserting nut
54
can idle at the main supporter
58
.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a liquid crystal display that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a liquid crystal display that prevents idling of a nut used for fixing a liquid crystal module.
Additional features and advantages of the invention will be set forth in the description that follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, a liquid crystal display device according to the present invention includes a main supporter holding a backlight unit and a liquid crystal display panel; a top case for enclosing the edges of the liquid crystal display panel and the main supporter; and an inserting nut that is pressed into the top case and is used for fixing the top case and the main supporter by way of a screw.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
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Kim Young-Su
Lee Joung-Jae
LG. Philips LCD Co. Ltd.
McKenna Long & Aldridge LLP
Parker Kenneth A
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