Liquid crystal cells – elements and systems – Particular structure – Holder – support – frame – or housing
Reexamination Certificate
2000-07-25
2002-07-30
Sikes, William L. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Holder, support, frame, or housing
Reexamination Certificate
active
06426784
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Industrial field
The present invention relates to a liquid crystal display for a notebook-type personal computer and a method for assembling the same.
2. Prior art
FIG. 4
is a partially sectional view showing an upper side portion of a conventional liquid crystal display for a notebook-type personal computer. In the drawing, reference numeral
3
is a liquid crystal display module in which a back light panel is combined with a liquid crystal display panel including a liquid crystal plate integrated with a driving circuit substrate. Numeral
14
is an upper case having a display opening portion, and in which upper side portion is provided with a claw which is formed by bending. Numeral
15
is a lower case having a groove
15
a
in which a claw
16
is inserted and which stores the liquid crystal display module
3
in cooperation with the upper case
14
. The letter A in the drawing shows a space required for inserting the claw
16
into the groove
15
a
when the liquid crystal display is assembled. In this manner, the conventional liquid crystal display for a notebook-type personal computer is provided with a claw escaping space A for inserting the claw
16
into the lower case
15
when the liquid crystal display module
3
is stored into the upper case
14
and the lowercase
15
.
On the other hand, in order to make the frame of the liquid crystal display narrow, it is desirable to minimize the space A for inserting the claw
16
. Therefore, a method has been proposed in which the lower case
15
is formed with a resin or the like having a high elastic modulus and the lower case
15
is deformed outwardly and fitted with the upper case
14
when the claw
16
is inserted. There is proposed another method to cope with the case where there is no space for inserting the head of the claw
16
. In this method, after shifting the liquid crystal display module
3
downward and fitting the upper side of the upper case
14
with the lower case
15
, the liquid crystal display module
3
is moved from outside to a predetermined position using a jig or the like.
In recent years, under the background that the liquid crystal display for a notebook-type personal computer has become thinner, mechanical strength of the liquid crystal display tends to decrease accordingly. Moreover, a main body (not shown in the drawing) including an electronic controller and the liquid crystal display are connected through a hinge having a torque. As the screen has become larger, a distance between the point of application and the center of rotation increases when the display is opened and closed, and therefore a larger bending moment comes to act on the liquid crystal display portion.
While the screen of the liquid crystal display panel has become larger, size of the main body depending on size of the keyboard is almost fixed. For design reasons, it is necessary that the configurations of the main body and the liquid crystal display in a plane are equal in size, and consequently the frame of the liquid crystal display is required to be narrower. As a result, it is getting more difficult to provide the space A for inserting the fitting claw
16
like in the conventional liquid crystal display shown in
FIG. 4
because of increase in the distance between the end face of the display plane and the external configuration.
As the liquid crystal display becomes thinner, there is a tendency to use a metal material or the like of high rigidity for the lower case
15
in order to maintain the mechanical strength of the liquid crystal display. In general, however, a metal material has a high elastic modulus, and it is difficult to deform the lower case
15
outwardly in order to fit the lower case
15
with the upper case
14
when the claw
16
is inserted. Moreover, the assembling method in which the position of the liquid crystal display module
3
is adjusted using a jig or the like has problems such as insufficient productivity, possibility of harming the liquid crystal display module
3
and other parts.
SUMMARY OF THE INVENTION
The present invention was, made to solve the above-discussed problems and has an object of providing a highly reliable liquid crystal display superior in mechanical strength and capable of enlarging the screen while making the frame narrow. The invention also provides a method for assembling such a liquid crystal display.
A liquid crystal display according to the invention comprises:
a liquid crystal display module in which a back light panel is combined with a liquid crystal display panel including a liquid crystal plate which is one with a driving circuit substrate;
an upper case which has an upper side portion and a lower side portion facing each other and a pair of side portions provided between the upper and lower side portions, and forms a display opening portion with the upper side portion, lower side portion, and pair of side portions;
a claw provided on the upper side portion of the upper case;
a lower case which has a groove in which the claw fits and stores the liquid crystal display module with the upper case; and
liquid crystal display module positioning projections each being provided on each of two side portions of the upper case and including a tapered portion which is formed to be thinner toward the end and a straight portion serving as a base portion; and
wherein both side portions of the liquid crystal display module are provided with liquid crystal display module positioning holes in which the positioning projections are inserted.
It is preferable that the liquid crystal display module positioning holes are directly formed on both side portions of the liquid crystal display module.
It is preferable that the liquid crystal display module positioning holes are formed on positioning parts fixed to the liquid crystal display module.
A liquid crystal display according to the invention comprises:
a liquid crystal display module in which a back light panel is combined with a liquid crystal display panel including a liquid crystal plate which is one with a driving circuit substrate;
an upper case which has an upper side portion and a lower side portion facing each other and a pair of side portions provided between the upper and lower side portions, and forms a display opening portion with the upper side portion, lower side portion, and pair of side portions;
a claw provided on the upper side portion of the upper case;
a lower case which has a groove in which the claw fits and stores the liquid crystal display module with the upper case; and
liquid crystal display module positioning projections each being provided on each of two side portions of the upper case and including a tapered portion which is formed to be thinner toward the end and a straight portion serving as a base portion; and
wherein both side portions of the upper case are provided with liquid crystal display module positioning holes in which the positioning projections are inserted.
It is preferable that the liquid crystal display module positioning projections are formed on both side portions of the mentioned liquid crystal display module.
It is preferable that the liquid crystal display module positioning projections are formed on positioning parts fixed on the mentioned liquid crystal display module.
It is preferable that the lower case is made of a metal material such as magnesium alloy of high rigidity.
A method for assembling a liquid crystal display according to the invention is a method for assembling a liquid crystal display which possesses a liquid crystal display module in which a back light panel is combined with a liquid crystal display panel including a liquid crystal plate integrated with a driving circuit substrate, an upper case which has an upper side portion and a lower side portion facing each other and a pair of side portions located between the upper and lower side portions and forms a display opening portion with the upper side portion, lower side portion, and pair of side portions, a claw located on the upper side portion of the upper case, and a lower c
Kuroki Takuya
Sakai Seiji
Tajiri Tomohisa
Kabushiki Kaisha Advanced Display
McDermott & Will & Emery
Nguyen Hoan
Sikes William L.
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