JP3565998B2 - Liquid crystal display - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a structure capable of reducing a required space of the electronic device when assembling it into an electronic device such as a personal computer or securing an adjacent installation space for other functional components.
[0002]
[Prior art]
2. Description of the Related Art Liquid crystal display devices have been widely used as panel-type devices for displaying video and images.
[0003]
As the liquid crystal display device, a simple matrix type called a so-called STN-LCD and an active matrix type represented by a TFT-LCD are known.
[0004]
A liquid crystal display device includes, for example, a display panel in which two transparent insulating substrates (generally, glass plates) each having a pixel electrode formed of a transparent conductive film are bonded, and a liquid crystal is sealed in a gap between the two. A circuit board on which various electronic elements such as a drive IC are mounted on the outer periphery, a backlight and other necessary constituent materials are laminated, and these are sandwiched and integrated between a metal frame (shield case) and a molded frame made of plastic or the like. Become
[0005]
In particular, a TFT-LCD, which is a typical liquid crystal display device of the active matrix type, arranges a thin film transistor corresponding to each of a plurality of pixel electrodes arranged in a matrix and selects a desired pixel to display an image. Is what you do.
[0006]
The liquid crystal in each pixel of the TFT-LCD theoretically adopts a time-division driving method of always driving (duty ratio 1.0), so that the contrast is better than that of a so-called simple matrix method, and especially, the color It is indispensable for display.
[0007]
Japanese Unexamined Patent Publication (Kokai) No. 63-309921 can be cited as an example of a conventional technique relating to a TFT-LCD.
[0008]
FIG. 8 is a schematic plan view of an essential part for explaining a structural example of a corner portion of a conventional liquid crystal display device. FIG. 9 is a schematic cross-sectional view taken along line AA of FIG. 1a is an upper glass plate, 1b is a lower glass plate, 2 is a flexible wiring board (hereinafter also referred to as FPC), 2a is a terminal, 2d is a wiring, 3 is a signal generating substrate, 4 is a driver IC, 5 is a liquid crystal module fixing screw. It is a hole position.
[0009]
8 and 9, the liquid crystal panel 1 has a liquid crystal layer sandwiched between two glass plates (an upper glass plate 1a and a lower glass plate 1b) on which transparent electrodes and other functional films are formed. Various printed boards on which a drive circuit, a control circuit, and the like are mounted are connected to the back surface of the unit.
[0010]
In recent years, a so-called COG (chip-on-glass) mounting method in which the drive IC 4 is directly mounted on the surface of the edge portion of the lower glass substrate 1b, which is one glass plate, has been adopted.
[0011]
For example, at one edge of the illustrated liquid crystal panel, a flexible print is made between the drive IC 4 mounted on the lower glass plate 1b and the signal generation substrate 3 mounted with a signal processing IC and the like installed on the peripheral back side of the glass substrate 1b. The connection is made via the substrate 2.
[0012]
In this corner, since the signal generating substrate 3 and the flexible printed circuit board 2 project outward from the liquid crystal panel 1, the positions of the screw holes for fixing the liquid crystal module for mounting the light guide plate and the backlight on the liquid crystal panel 1 to form a module. 5 is located at a position separated from the signal generating board 3 and the flexible printed board 2 as shown.
[0013]
FIG. 10 is a plan view of a main part of a screen side cabinet showing a state in which a liquid crystal module is incorporated in a notebook type personal computer, where 1 is a liquid crystal panel, 6 is a screw hole position for fixing the front and back of the cabinet on the screen side, and 7 is a screen of the notebook personal computer. The side cabinet 8 is a liquid crystal module.
[0014]
As shown in the figure, the screen-side cabinet 7 has a space for the screen-side cabinet front / back fixing screw hole position 6 for fixing the front and back members thereof.
[0015]
[Problems to be solved by the invention]
In the above-mentioned conventional liquid crystal display device, when the liquid crystal module 8 is to be mounted on the entire inner size of the screen side cabinet 7 of an electronic device such as a personal computer, a space for the above-mentioned cabinet front and back fixing screw hole positions 6 must be secured. There was a problem that can not be.
[0016]
Also, it has been difficult to secure a space for attaching a functional component such as a speaker around the liquid crystal screen.
[0017]
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to make it possible to mount a liquid crystal module to the inside of a screen-side cabinet of an electronic device to be incorporated, or to provide a functional component such as a speaker around a display screen of the cabinet. It is an object of the present invention to provide a liquid crystal display device having a structure in which can be installed.
[0018]
[Means for Solving the Problems]
The configuration of the present invention for achieving the above object will be described with reference numerals of the embodiments for easy understanding.
[0019]
That is, according to the first aspect of the present invention, the first insulating substrate 1b and the second insulating substrate 1a are opposed to each other, and the liquid crystal is provided between the first insulating substrate 1b and the second insulating substrate 1a. the liquid crystal panel 1 obtained by encapsulating the first insulating liquid crystal display device and a flexible printed circuit board 2 and the substrate 1b are connected to the end portion of the main surface facing the second insulating substrate 1a At
(1) a first portion that is separated from the main surface end of the first insulating substrate 1b and extends along the main surface end; and (2) the first portion from the first portion. Two second portions each having a terminal 2a connected to the end of the main surface, which extends to the end of the main surface of the first insulating substrate and is spaced apart along the end of the main surface and connected to the end of the main surface; Forming a single piece between the two second portions with a third portion extending from the first portion to an end of the main surface of the first insulating substrate;
Dividing the first portion of the flexible printed board 2 by a notch 2b formed between the two second portions and reaching an end of the first insulating substrate 1b;
That you provide a bypass wiring 2d for connecting one of the wiring and its other lines of the shed first portion of the first part is and the divided connecting with the third portion 2c to the third portion 2c Features.
[0020]
Ri by this structure, the order one of the divided first portion of the flexible printed circuit board 2 is to Orikomeru on the back side of the first insulating substrate 1b, enough space in the corner portion of the liquid crystal module is secured, In addition to the screw holes for fixing the liquid crystal module, the space for the screw holes for fixing the front and back members of the screen-side cabinet such as a personal computer or the space for installing the functional components such as the speakers is secured. In addition, it becomes possible to mount the liquid crystal module in a size that is the full size of the inside of the screen side cabinet.
[0021]
In a second aspect of the present invention, the wiring board 3 connected to the first insulating board 1b via the flexible wiring board 2 in the first invention is connected to the first insulating board 1b. It is provided on the back side of the main surface so as to face one of the divided first portions of the flexible printed circuit board 2 and not to the other side, and put one of the divided first portions toward the back side of the main surface. It is characterized in that it is opposed to the wiring substrate 3 without bending, and the other of the divided first portions is bent to the back side of the main surface of the first insulating substrate 1b .
With this configuration, the space formed by bending the other of the divided first portion to the back side of the main surface of the first insulating substrate 1b is formed by a functional component different from a component of the liquid crystal display device. It can be used as an installation space. For example, a small speaker can be mounted on the same surface as the display screen of the screen-side cabinet such as a personal computer. In addition, it becomes possible to mount a liquid crystal module having a size that is the full size of the inside of the screen side cabinet.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0025]
FIG. 1 is a schematic plan view of an essential part for explaining a configuration of one embodiment of a liquid crystal display device according to the present invention, FIG. 2 is a schematic cross-sectional view taken along line BB of FIG. 1a is an upper glass plate, 1b is a lower glass plate, 2 is a flexible wiring board, 2a is a terminal, 2b is a cut, 2c is a detour wiring section, 2d is a wiring, 3 is a signal generation board, 4 is a driver IC, and 5 is a driver IC. This is the position of the screw hole for fixing the liquid crystal module.
[0026]
1 and 2, in the liquid crystal display device, a driving IC 4 is directly mounted on the surface of an edge portion of one glass substrate 1b constituting the liquid crystal panel 1, and a wiring substrate is provided on the peripheral back surface of the glass substrate 1b. 3 are connected via the flexible printed circuit board 2.
[0027]
The wiring board 3 is provided with screw holes for modularizing the liquid crystal panel together with components such as a light guide plate and a backlight between the corner portion of the corner portion side end portion of the liquid crystal panel 1 and a screen side of a personal computer or the like. It is installed along the edge of the glass substrate 1b from a retracted position with a predetermined space corresponding to a space for screw holes for fixing the front and back members of the cabinet or a space for installing a functional component such as a speaker.
[0028]
Further, the flexible wiring board 2 is installed on the peripheral surface side of the one glass substrate 1b, and over the wiring board 3 and the predetermined space.
[0029]
The flexible wiring board 2 has a notch 2b extending from the outer edge near the corner of the wiring board 3 to the edge of the one glass substrate 1b, and the portion of the wiring board located on the surface of the one glass substrate 1b is provided. 3 and a detour wiring portion 2c for connecting the wiring in the predetermined space with the wiring located on the predetermined space.
[0030]
Then, the flexible wiring board 2 located in the predetermined space is folded at the notch 2b on the back side of the one glass substrate 1b.
[0031]
FIG. 3 is a schematic plan view of a main part showing a state in which a corner portion of the flexible wiring board 2 in FIG. 1 is folded into the back side of one glass substrate 1b constituting a liquid crystal panel. This is the screw hole position. FIG. 4 is a schematic cross-sectional view taken along line CC of FIG.
[0032]
In FIGS. 3 and 4, when the flexible wiring board 2 located in the predetermined space is folded into the back side of one of the glass substrates 1b by the cuts 2b shown in FIG. 1, screw holes for fixing the liquid crystal module are formed in the space. Space for the position 5 and the screw position 6 for fixing the front and back of the screen side cabinet is secured.
[0033]
FIG. 5 is a plan view of a main part of a screen side cabinet showing a state in which a liquid crystal module using the liquid crystal display device according to the present invention is incorporated in a notebook personal computer.
[0034]
As shown in the figure, according to the configuration of the present embodiment, a space for the front and back fixing screws 6 of the screen-side cabinet 7 is secured, and the liquid crystal module can be mounted on the entire inside size of the cabinet 7. .
[0035]
When a liquid crystal module having a size as shown in FIG. 10 is mounted on the screen-side cabinet 7, a speaker and other components can be installed in a space corresponding to the screw hole position 5 for fixing the liquid crystal module in FIG. The effective space of the personal computer cabinet (not shown) can be expanded.
[0036]
FIG. 6 is a developed perspective view for explaining an example of the overall configuration of a liquid crystal module using the liquid crystal display device according to the present invention.
[0037]
In the same figure, SHD is a shield case (also called a metal frame) made of a metal plate, WD is a display window, SPC1 to SPC4 are insulating spacers, FPC1 and FPC2 are bent multilayer flexible circuit boards (FPC1 is a gate side circuit board, FPC2 Is a drain side circuit board), PCB is an interface circuit board, ASB is an assembled liquid crystal display element with a drive circuit board, and PNL is a drive circuit (a glass substrate) on one of two superposed transparent insulating substrates (glass plates). A liquid crystal display element (also referred to as a liquid crystal display panel) mounted with a driving IC), GC1 and GC2 are rubber cushions, PRS is a prism sheet (2 sheets), SPS is a diffusion sheet, GLB is a light guide plate, RFS is a reflection sheet, and MCA is Lower case (mold case) formed by integral molding, LP is a fluorescent tube LPC1, LPC2 are lamp cables, LCT is a connector for an inverter, GB is a rubber bush supporting the fluorescent tube LP, HS is a frame ground, and SLV is a sleeve for fixing screws, as shown in the figure. The liquid crystal display module MDL is assembled by stacking the respective members in a suitable mutual arrangement relationship.
[0038]
That is, the liquid crystal display module MDL has two types of storage / holding members, a lower case MCA and a shield case SHD, and a metal housing and fixing the insulating spacers SPC1 to 4, the circuit boards FPCB1 to 3, the PCB, and the liquid crystal panel PNL. Module fixing screw provided on the frame SHD by combining the shield case SHD made of Fluorescent Glass with the lower case MCA containing the backlight BL including the fluorescent tube LP, the light guide plate GLB, the prism sheet PRS, the diffusion sheet SPS, etc. The screws are fixed through the holes and the liquid crystal module fixing screw holes provided in the lower case MCA.
[0039]
An integrated circuit chip for driving each pixel of the liquid crystal display panel PNL is mounted on the multilayer flexible circuit boards FPC1 and FPC2, and a control signal such as a reception of a video signal from an external host and a timing signal is mounted on the interface circuit board PCB. And a timing converter that processes the timing to generate a clock signal.
[0040]
As shown in the figure, recesses ALS1 and ALC2 are formed at the corners of the shield case SHD, and the front and back mounting screw holes of the cabinet can be located at these portions, so that a liquid crystal module of the full size of the inside of the cabinet can be mounted. .
[0041]
In the figure, the recesses ALC1 and ALC2 are provided only in two places on the upper side of the frame SHD. However, if there is room in the upper right corner, they may be provided only in the upper left corner. A recess similar to the above may be formed in all corners of the shield case SHD by giving the same configuration to the flexible wiring boards FPC and PCB.
[0042]
Note that a speaker or the like can be provided in the above-described recessed portion of the cabinet 7.
[0043]
FIG. 7 is an external view of a notebook personal computer illustrating an example of an information processing device mounted with a liquid crystal module using the liquid crystal display device according to the present invention. Is an inverter power supply for driving the fluorescent tube, and CPU is a host side central processing unit.
[0044]
As described above with reference to FIG. 6, in the personal computer on which the liquid crystal display device according to the present invention is mounted, a space is secured at the corner of the liquid crystal module. You will not be disturbed.
[0045]
Therefore, it is possible to mount the liquid crystal module over the entire inner size of the screen side cabinet.
[0046]
【The invention's effect】
As described above, according to the present invention, a liquid crystal module can be mounted on the entire inner size of a screen-side cabinet of an electronic device to be incorporated, or a functional component such as a speaker can be installed around a display screen of the cabinet. A liquid crystal display device having a structure can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a main part for describing a configuration of an embodiment of a liquid crystal display device according to the present invention.
FIG. 2 is a schematic sectional view taken along line BB of FIG.
FIG. 3 is a schematic plan view of an essential part showing a state in which a corner portion of a flexible wiring board 2 in FIG. 1 is folded into a back surface side of one glass substrate 1b constituting a liquid crystal panel.
FIG. 4 is a schematic sectional view taken along the line CC of FIG. 3;
FIG. 5 is a plan view of a main part of a screen-side cabinet showing a state in which a liquid crystal module using the liquid crystal display device according to the present invention is incorporated in a notebook computer.
FIG. 6 is an exploded perspective view illustrating an example of the overall configuration of a liquid crystal module using the liquid crystal display device according to the present invention.
FIG. 7 is an external view of a notebook computer illustrating an example of an information processing device in which a liquid crystal module using the liquid crystal display device according to the present invention is mounted.
FIG. 8 is a schematic plan view of an essential part for explaining a structural example of a corner portion of a conventional liquid crystal display device.
FIG. 9 is a schematic sectional view taken along line AA of FIG. 8;
FIG. 10 is a plan view of a main part of a screen-side cabinet showing a state in which a liquid crystal module is incorporated in a notebook personal computer.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 1a Upper glass plate 1b Lower glass plate 2 Flexible wiring board 2a Terminal 2b Cut 2c Detour wiring part 2d Wiring 3 Signal generation board 4 Driver IC
5 LCD module fixing screw hole position 6 Cabinet front and back fixing screw hole position 7 Screen side cabinet 8 Liquid crystal display device.

Claims (2)

A liquid crystal panel in which the first insulating substrate 1b and the second insulating substrate 1a are opposed to each other and a liquid crystal is sealed between the first insulating substrate 1b and the second insulating substrate 1a;
A flexible printed circuit board connected to an end of a main surface opposed to the first insulating substrate and a second insulating substrate;
The flexible printed circuit board 2 includes a first portion spaced apart from the main surface end of the first insulating substrate 1b and extending along the main surface end, and a first portion of the first insulating substrate 1b extending from the first portion. and two second portions of the terminal 2a respectively provided to and juxtaposed to connect to the main surface end portion apart from each other to respectively extend and the main surface end portion along the plane end of the two second portions A third portion extending from the first portion to an end of a main surface of the first insulating substrate between the first portion and the third portion ,
The first portion of the flexible printed circuit board 2 is formed between the two second portions and is divided by a notch 2b reaching an end of the first insulating substrate 1b,
The liquid crystal display according to claim 1, wherein the divided first portion is connected by the third portion 2c, and the third portion 2c is provided with a bypass wiring 2d for connecting the wiring of the divided first portion. apparatus. On the back side of the main surface of the first insulating substrate 1b, a wiring board 3 connected to the first insulating substrate 1b via the flexible printed board 2 faces one of the divided first portions. One of the divided first portions is opposed to the wiring substrate 3 without being bent to the back side of the main surface, and the other of the divided first portions is not 2. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is bent to the back side of the main surface of the first insulating substrate 1b.

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