Liquid crystal cells – elements and systems – Particular structure – Holder – support – frame – or housing
Reexamination Certificate
2001-11-12
2004-05-25
Ton, Toan (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Holder, support, frame, or housing
C361S689000, C361S752000
Reexamination Certificate
active
06741300
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a liquid crystal display device; in particular, the invention relates to a liquid crystal display device with minimized thickness.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional liquid crystal display device
30
comprises a liquid crystal display unit
31
, a rear case
33
and a front case
32
. At the side surface of the liquid crystal display unit
31
, first screw holes
311
a
are formed. At the side surface of the rear case
33
, second screw holes
331
are formed. The rear case
33
combines with the liquid crystal display unit
31
by screws
34
that are locked to the first screw holes
311
a
and the second screw holes
331
.
Referring to
FIG. 2
, the liquid crystal display unit
31
comprises a first frame
311
. On the first frame
311
, a reflector
3121
, a light guide
3122
, a protection sheet
3123
, a first prism sheet
3124
, a second prism sheet
3125
, a diffuser
3126
, and a liquid crystal panel
313
are stacked sequentially. The reflector
3121
, the light guide
3122
, the protection sheet
3123
, the first prism sheet
3124
, the second prism sheet
3125
. The diffuser
3126
generally consists of a back light unit
312
. At the side surface of the first frame
311
, the first screw holes
311
a
are formed.
In order to join the plastic first frame
311
, the back light unit
312
and the liquid crystal panel
313
, a second frame
314
made of metal is mounted at the side surface of the first frame
311
. At the side surface of the second frame
314
, third screw holes
314
a
, corresponding to the first screw holes
311
a
respectively, are formed.
Referring to
FIG. 3
, a notebook computer
2
, having the above liquid crystal display device
30
, is shown. The liquid crystal display device
30
is rotatably disposed on a body
40
.
During the assembly of the conventional liquid crystal display device
30
, all parts of the liquid crystal unit
31
are firstly joined together. Then, the liquid crystal unit
31
combines with the front case
32
and the rear case
33
. Thus, the first frame
311
and the second frame
314
are necessary parts in the conventional liquid crystal display device
30
. Due to all of the necessary parts in the conventional liquid crystal display device
30
, the thickness of the conventional liquid crystal display device
30
cannot be minimized furthermore.
SUMMARY OF THE INVENTION
In order to address the disadvantages of the aforementioned liquid crystal display device, the invention provides a liquid crystal display device of minimized thickness. As well, this invention does not follow the conventional design concept of liquid crystal display device in that the design of the covers is independent.
Accordingly, the liquid crystal display device of this invention comprises a frame, a back light unit, a liquid crystal panel, a first cover and a second cover. The frame is provided with at least one first connecting member. The back light unit is disposed on the frame, and the liquid crystal panel is disposed on the back light unit. The first cover is provided with at least one second connecting member, and it combines with the frame by engagement between the first connecting member and the second connecting member. The second cover is provided with at least one third connecting member, and it combines with the frame by engagement between the first connecting member and the third connecting member. The frame, the back light unit and the liquid crystal panel are located between the first cover and the second cover.
Furthermore, the first connecting member is provided with a first slot and a second slot. The second connecting member is a first protrusion corresponding to the first slot, and the third connecting member is a second protrusion corresponding to the second slot. The first cover combines with the frame by the engagement between the first slot and the first protrusion, and the second cover combines with the frame by the engagement between the second slot and the second protrusion.
Furthermore, the first protrusion, engaging with the first slot, is not in contact with the second protrusion engaging with the second slot.
Furthermore, the first connecting member is made of plastic.
Furthermore, the back light unit comprises a reflector, a light guide, a first diffuser, a first prism sheet, a second prism sheet and a second diffuser. The reflector is disposed on the frame, and the light guide is disposed on the reflector. The first diffuser is disposed on the light guide, and the first prism sheet is disposed on the first diffuser. The second prism sheet is disposed on the first prism sheet, and the second diffuser is disposed on the second prism sheet.
In a preferred embodiment, this invention provides a notebook computer that comprises a body and the above liquid crystal display device rotatably disposed on the body.
REFERENCES:
patent: 5905550 (1999-05-01), Ohgami et al.
patent: 5946061 (1999-08-01), Kurihara et al.
patent: 6392723 (2002-05-01), Sugiyama et al.
patent: 6480307 (2002-11-01), Yang
patent: 6507484 (2003-01-01), Fukuyoshi
Chien-Te Li
Huang-Lung Hung
Lee Cheng-Chang
Lun Su-Shen
Ying-Huang Liu
Ladas & Parry
Nguyen Hoan
Ton Toan
Wistron Corp.
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