JP2001290134A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operational reliability of a liquid crystal display device and a liquid crystal display element (liquid crystal display panel) while corresponding to the thin film forming of the same. SOLUTION: The liquid crystal display device is provided with a liquid crystal display element 3 which is equipped with a pair of transparent substrates 32, 33 placed opposite to each other across a liquid crystal layer, a back light 61 which is disposed on the rear face side of the liquid crystal display element 3, a driving circuit substrate 4 for driving the liquid crystal display element 3 and an outer casing body 2 which houses the liquid crystal display element 3, the back light 61 and the driving circuit substrate 4 and is provided with an opening part 21 through which a display region of the liquid crystal display element 3 is exposed outward. Further in the outer casing body 2, the transparent substrate 31 of a front face side between the transparent substrates is inserted into an opening part 21 and a position regulating projecting parts 22, 22, which subject the transparent substrate 32 on the rear face side to the position regulation with respect to the opening part 21 while abutting on the end part 32c of the transparent substrate 32 of the rear face side, are disposed on the surroundings of the opening part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and more particularly to a technique suitable for use in a liquid crystal display having a backlight.

[0002]

2. Description of the Related Art In recent years, small and portable liquid crystal display devices such as mobile tools, portable televisions and portable game machines have been increasingly used. Since such a liquid crystal display device is used in a portable state as a use state, there is a great demand for downsizing in order to improve its convenience. In particular, there has been a demand to reduce the thickness.

As an example of such a liquid crystal display device, for example, a liquid crystal display device as shown in FIG. 7 is known. 7, reference numeral 110 denotes a liquid crystal panel, and 112 denotes a drive I.
C, 113 is a flexible substrate, 120 is a light guide member, 1
Numeral 30 is a frame, 131 is a fluorescent tube receiving portion, 132 is a fluorescent tube reflecting member receiving portion, 133 panel receiving portion, 134 is a light guide member parting portion, 135 is a hook, 136 is a panel storing portion, 140
Is a light diffusion member, 145 is a prism sheet, 150 is a backlight, 160 is a reflection member, 161 and 162 are both end portions, 170 is a panel front support member, 171 is a liquid crystal panel display unit, and 100 is a source substrate.

In such a liquid crystal display device, the liquid crystal panel 110 has a liquid crystal sandwiched between two transparent substrates, and the periphery of the transparent substrate is sealed with a seal. On the opposing surface of the transparent substrate, a gate line and a source line are provided so as to be orthogonal to each other, and a flexible substrate (FPC) 11 is provided on the gate line and the source line.
3, a driving IC 11 for driving the liquid crystal panel 110
2 are connected to the driving circuits on the gate substrate and the source substrate 100, respectively. Further, the liquid crystal display device is provided with a backlight 150 that illuminates the liquid crystal panel 110 from the side opposite to the viewing side (back side).

In such a liquid crystal display device, as shown in FIG. 7, a panel front support member is provided at a position in front of the front surface of the liquid crystal panel 110 when viewed from the viewing side of the liquid crystal panel 110, that is, outside the liquid crystal display device. 170 is located. In order to further reduce the thickness of such a configuration, the present inventors have proposed a configuration as shown in FIG.

In FIG. 8, reference numeral 110A is a front panel, 110B is a rear panel, 170 'is a panel front support member, and components corresponding to those in FIG. 6 are denoted by the same reference numerals. . In such a configuration, the end (end face) 110a of the front panel 110A and the end (end face) 170a of the panel front support member 170 'are brought into contact with each other so as to come into contact with each other, so that the front panel 110A is viewed from the visual side. The front surface and the outer surface (surface) of the panel front support member 170 'are located on substantially the same plane, and the panel front support member 170 can be reduced in thickness by an amount corresponding to the thickness as compared with the configuration shown in FIG. It is planned. At the same time, this front panel 11
The liquid crystal panel 110 is positioned and held with respect to the panel front support member 170 'by the configuration in which the end 110a of the panel 110A and the end portion 170a of the panel front support member 170' are brought into contact with each other.

In order to further reduce the thickness of the liquid crystal display device, both panels 110 constituting the liquid crystal panel 110 are formed.
It has been studied to make A, 110B as thin as about 0.5 mm or less.

[0008]

However, in the structure shown in FIG. 8, the end 110a of the front panel 110A is not provided.
And the end 170a of the panel front support member 170 'is brought into contact with each other to perform positioning and fixing, so that the thickness of the front panel 110A is 0.5 mm.
When the front panel 10A is thinned to a degree or less, the front panel 10A has a small protruding dimension from the front main surface of the rear panel 10B.
There was a problem that the liquid crystal panel 110 could not be sufficiently fixed to the 0 'end face 170a, and it was difficult to position and hold the liquid crystal panel 110 with respect to the panel front support member 170'. Further, in an assembling process or the like at the time of manufacturing, the front panel 1
Since the front panel 110A end face 110a receives a load from the panel front support member 170 'end 170a in order to fix the panel 10A and the panel front support member 170', there is a possibility that the liquid crystal panel 110 may be damaged by mechanical stress generated by receiving a load from the panel front support member 170 'end 170a. There is a problem that it causes a malfunction of the liquid crystal display device. Also, the flexible substrate 113 and the rear panel 110 to which the flexible substrate 113 is connected.
In order to fix the front panel 110A and the panel front support member 170 ', the terminal portion 110b of B is in contact with the inner side surface (back surface) of the panel front support member 170'. The liquid crystal panel 110 and the flexible substrate 113 may be damaged by mechanical stress generated when the substrate 113 and the terminal portion 110b receive a load from the inner surface (rear surface) of the panel front support member 170 ', causing a malfunction. There was a case.

The present invention has been made in view of the above circumstances, and aims to achieve the following objects. To reduce the thickness of the liquid crystal display device. To be able to respond to thinning of liquid crystal display elements (liquid crystal panels). Improve operational reliability.

[0010]

The present invention provides a liquid crystal display device comprising a pair of transparent substrates opposed to each other with a liquid crystal layer interposed therebetween,
A backlight disposed on the back side of the liquid crystal display element, a driving circuit board for driving the liquid crystal display element, and a housing for accommodating the liquid crystal display element, the backlight, and the driving circuit board; An outer housing provided with an opening for exposing a display area to the outside, wherein a front-side transparent substrate of the pair of transparent substrates is inserted into the opening of the outer housing; Around the opening of the housing, of the pair of transparent substrates, there is a position regulating protrusion that contacts the end of the rear transparent substrate and regulates the position of the rear transparent substrate with respect to the opening. The above-mentioned problem was solved by being provided. In the present invention, a terminal portion of the liquid crystal display element and a driving circuit on the driving circuit board are connected by a plurality of flexible wiring boards, and between the adjacent flexible wiring boards, the rear surface side It is preferable that the end of the transparent substrate abuts on the position regulating projection. Further, in the present invention, a means in which the position restricting projection is integrated with the outer housing may be employed. In the present invention, a protection member for protecting the terminal portion and the flexible wiring board may be provided on an outer housing side of the rear transparent substrate.

In the present invention, around the opening of the outer casing,
Of the pair of transparent substrates, by providing a position regulating projection that abuts on an end (end surface) of the rear transparent substrate to regulate the position of the rear transparent substrate with respect to the opening.
When positioning and mounting and fixing the liquid crystal display element to the outer casing, the positioning and mounting and fixing of the liquid crystal display element can be performed mainly by the rear transparent substrate instead of the front transparent substrate. Thickness of the transparent substrate on the front side
Even when the thickness is set to about mm or less, the positioning and mounting and holding can be performed sufficiently without depending on the thickness dimension of the transparent substrate on the front side. Further, the front transparent substrate and the outer casing are not directly fixed in the assembling process at the time of manufacturing, and the front transparent substrate end face is not likely to receive a load from the outer casing end. It is possible to reduce the causes of malfunctions such as damage due to stress.

[0012] In the present invention, a plurality of flexible wiring boards in which a terminal portion of the liquid crystal display element and a drive circuit on the drive circuit board are intermittently arranged at a part of an outline of the liquid crystal display element In the position between the flexible wiring boards adjacent to each other, the end of the rear-side transparent substrate and the position-controlling protrusion come into contact with each other, so that the position-controlling protrusion and the rear-side transparent substrate Fixation and positioning, that is, when fixing and positioning the outer housing and the liquid crystal display element, it is possible to prevent a load from being applied between the outer housing and the liquid crystal display element via the flexible wiring board, As a result, it is possible to reduce the causes of malfunctions such as breakage due to mechanical stress. At the same time, the fixing position of the rear transparent substrate and the outer casing is set at the position in the peripheral direction of the rear transparent substrate, so that the accuracy of the mounting fixing position can be improved.

In the present invention, by adopting a means in which the position restricting projection is integrated with the outer casing, the position restricting convex can be formed at the time of manufacturing the outer casing. As compared with the case of having a process, the manufacturing process and the manufacturing cost can be reduced, and the manufacturing time can be shortened. Here, when the outer housing is manufactured by punching and bending a metal plate, it is particularly easy to manufacture the position regulating protrusion and the outer housing by the same manufacturing process.

A protective member for protecting the terminal portion and the flexible wiring board is provided on the outer housing side of the rear transparent substrate, so that the terminal portion and the flexible wiring board are provided on the terminal portion facing the outer housing. It is possible to protect the transparent wiring made of ITO or the like and the flexible wiring board connected thereto. For example, it is possible to prevent the terminal unit and the flexible wiring board from coming into contact with the outer housing during assembly. In addition, at the same time, a load is applied between the outer housing and the terminal portion, and the flexible wiring board, and the operational reliability of the liquid crystal display device is caused by possible damage due to mechanical stress generated. Can be prevented from decreasing.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a liquid crystal display device according to the present invention will be described below with reference to the drawings. 1 is a perspective view showing a liquid crystal display device of the present embodiment, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a cross-sectional view of a main part of the liquid crystal display device 1 of the present embodiment, and FIG. FIG. 5 is an enlarged perspective view showing the body 2, and FIG. 5 is a plan view showing an assembled state of the liquid crystal panel 3 and the upper case 2. In the figure, reference numeral 1 denotes a liquid crystal display device, 2 denotes an upper case (outer housing), 3 denotes a liquid crystal panel (liquid crystal display element), 4 denotes a flexible wiring board (drive circuit board), 5 denotes a frame portion, and 6 denotes a backlight. A case, 7 is a control board, 8A is a power supply board, 8B is a decoder board, and 9 is a lower case (outer case).

As shown in FIGS. 1 and 2, a liquid crystal display device 1 of the present embodiment includes a liquid crystal display device 3 having a pair of transparent substrates 31 and 32 opposed to each other with a liquid crystal layer interposed therebetween. 3, a backlight unit 6, a frame unit 5 for accommodating the backlight 6, a driving circuit board 4 for driving the liquid crystal display element 3, and a liquid crystal display element 3, a backlight 6 And drive circuit board 4
Are stored in the outer casings 2 and 9. Outer housing 2,
9 is a viewing side (front side) as shown in FIGS.
The upper case 2 includes an opening 21 that exposes the display area of the liquid crystal display element 3 to the outside. In addition, these upper case 2 and lower case 9 are assembled in an assembled state.
As will be described later, cutouts forming side opening portions K are provided in the side surface portions.

As shown in FIGS. 1 to 4, the upper case 2 is manufactured by punching and bending a metal plate made of, for example, aluminum, SUS (stainless steel), or the like. The pair of transparent substrates 3 are formed around the opening 21 as described later.
1 and 32, a plurality of position regulating projections 2 that abut the end 32 c of the rear transparent substrate 32 to regulate the position of the rear transparent substrate 32 with respect to the opening 21.
2, 22 and position setting units 23, 23 are provided. The position regulating protrusions 22 are integrated with the outer casing 2 and are manufactured by bending a part of the metal plate of the upper case 2 to the inside of the outer casing 2. Also, the position setting units 23, 23
And an embossed portion provided so as to protrude from the main surface.

The liquid crystal panel 3 includes two transparent substrates 31 and 3
2 and the transparent substrates 31 and 32
The periphery is sealed with a seal, and a gate line and a source line made of ITO or the like are provided on the opposing surfaces of the transparent substrates 31 and 32 so as to be orthogonal to each other. Are connected to a gate substrate 41 on which a drive IC for driving the liquid crystal panel 3 is disposed and source substrates 42, 42 via flexible wiring substrates (TCP: Taping Carrier Package) 33, 33, respectively.

In the liquid crystal panel 3, polarizing plates 31a and 32a are provided on the surfaces of a pair of transparent substrates 31 and 32, respectively. Of the pair of transparent substrates 31 and 32, the transparent substrate 31 on the viewing side (the front side or the outside of the liquid crystal display device 1) is, as shown in FIGS. 3 and 4, the rear side (or the inside of the liquid crystal display device 1). The contour shape on the display surface is smaller than that of the transparent substrate 32 of ()). That is, as shown in FIGS. 3 and 4, the transparent substrate 32 on the rear side has a portion which does not overlap with the transparent substrate 31 on the front side in plan view. The existing portion forms the terminal portion 32b. Further, the transparent substrate 31 on the front side is
Is inserted into the opening 21 so that the contour of the transparent substrate 31 on the front side is positioned in the opening 21. Here, in the pair of transparent substrates 31 and 32, the thickness of the front transparent substrate 31 is set to about 0.5 mm, and the thickness of the rear transparent substrate 32 is set to about 0.5 mm. I have.

The transparent substrate 32 on the back side has a contour edge 32 c around the transparent substrate 32.
2 and 22 are assembled so as to contact the end portions 22a and the position regulating portions 23.
a and the position restricting portions 23 contact each other,
The in-plane mounting position of the main surface of the liquid crystal panel 3 with respect to the opening 21 is set, and thereby,
The positioning and attachment and fixing of the liquid crystal display element 3 to the upper case 2 can be performed mainly by the rear transparent substrate 32 instead of the front transparent substrate 31.

Gate substrate 41 and source substrates 42, 4
2 is connected to the terminal portion 32b of the transparent substrate 32 on the rear side via the flexible wiring substrates 33, 33. As shown in FIG. 3, the source substrate 42 and the transparent substrate 32 are substantially parallel at the time of assembly. And a portion between the frame portion 5 and the backlight case 6 is interposed therebetween, and has a thickness of 0.1 m made of, for example, polyimide.
As shown in FIG. 3, flexible wiring boards 33 of about m are assembled in a curved state. The flexible wiring boards 33, 33 are intermittently arranged so as to surround the periphery of the liquid crystal panel 3 and part of the contour of the liquid crystal panel 3, and as shown in FIG. The corresponding position regulating projections 22 are located between the flexible wiring boards 33, 33, and in this state, the end 32c of the transparent substrate 32 on the rear side and the respective position regulating projections 22, 22 abut. It is configured as follows.
Further, a protective member (protective film) 43 made of a film is provided outside the flexible wiring boards 33, 33 (on the upper case 2 side) so as to cover the whole thereof.

As shown in FIG. 3, both ends of the protective film 43 are fixed to the source substrate 42 and the upper case (outer housing) 2. This protective film 43
, The end on the terminal portion 32b side is positioned so as to cover the flexible wiring substrate 33 and the exposed terminal portion 32b of the ITO, and the flexible wiring substrate 3
3 and the inner surface of the upper case 2 facing the exposed terminal portion 32b of the ITO by a double-sided adhesive tape (protective member) 44. This double-sided adhesive tape (protective member) 4
When a load is applied between the inner surface of the upper case 2 and the flexible wiring board 33 and the exposed terminal portion 32b of the ITO, the flexible wiring board 3
3 and a protective member for protecting the ITO or the like of the terminal portion 32b. The double-sided adhesive tape (protective member) 44 has a cushioning property (flexibility), and has a sufficient thickness to reduce the load. Is set to have.

In the protective film 43, the end on the source substrate 42 side is positioned so as to cover the flexible wiring substrate 33, and at a position separated from the flexible wiring substrate 33, a double-sided adhesive tape is attached to the surface of the source substrate 42. 45. Here, the protective film 4
The protective film 43 is fixed so that the flexible wiring board 3 and the flexible wiring board 33 are not directly bonded.

As shown in FIGS. 2 and 3, the frame portion 5 is provided so as to receive the backlight case 6 in a detachable manner, and transfers heat and electric charges to the upper case 2 and the lower case 9. Conductively connected. Liquid crystal display device 1
In the thickness direction, a terminal portion 32b of the rear transparent substrate 32 of the pair of transparent substrates 31, 32 is sandwiched between the frame portion 5 and the upper case 2. Further, at a position where the terminal portion 32b is not sandwiched, the frame portion 5 and the upper case 2 are fixed at a joint portion by, for example, a screw screwed.

An opening 51a corresponding to the display section of the liquid crystal panel 3 is provided on the upper surface of the frame section 5, and, like the position setting sections 23, 23, position setting for setting the fixed position of the liquid crystal panel 3. The position setting portion includes a bent portion formed by bending upward from the side of the main surface of the frame portion 5 so as to regulate a fixing position in the direction of the source substrate 42, or a gate substrate. It is composed of an embossed portion provided so as to protrude from the main surface of the frame portion 5 so as to regulate the position in the 41 direction. When the rear transparent substrate 32 abuts on these position setting portions, the fixing position of the rear transparent substrate 32 with respect to the frame portion 5 is defined, and furthermore, the frame portion 5 and the outer casings 2 and 9 are fixed. Are screwed together so that the transparent substrate 32 on the rear side can be
9, the liquid crystal panel 3 can be fixed at a fixed position with respect to the upper case 2.

The lower part of the frame 5 is shown in FIGS.
As shown in (1), there are provided position defining portions 53 and 54 for defining a mounting position of the backlight case 6 and the frame portion 5. The position defining portions 53 and 54 are provided in the backlight case 6 so as to coincide with the longitudinal direction of the backlight case 6.
Rail portion 53 that defines the insertion / removal position of
Lower rail portion 5 that defines the installation position with respect to liquid crystal panel 3
4 and a stopper (not shown) for defining an end position in the insertion / removal direction of the backlight case 6.

As shown in FIG. 3, the backlight case 6 has an opening 61a corresponding to the display section of the liquid crystal panel 3, and includes therein a backlight 61 such as a cold cathode tube or the like. The light from the backlight 61 is applied to the liquid crystal panel 3
Sheets 63, 63 which are attached to the upper surface of the light guide plate 62 and are formed of a light diffusion member, a viewing angle correction member, and the like.
And are stored. Here, the backlight 61 has a structure in which the portion other than the side in contact with the light guide plate 62 is substantially covered with the backlight case 6. The backlight case 6 is made of, for example, SUS (stainless steel), has sufficient mechanical strength to withstand insertion and removal and deformation, and has excellent heat conductivity and electric conductivity. The generated heat and electric charges are conducted to the frame portion 5 and the like, and the heat and electromagnetic waves generated from the backlight 61 and the like are shielded, so that the influence on the external driving IC and the like is reduced.

The control board 7 includes a control IC 7
1, 71 and a switch unit 72 for inputting to the liquid crystal display device 1 are provided, and are connected to the gate substrate 41 and the source substrate 42. By controlling these operations, the display operation of the liquid crystal panel 3 is controlled. In addition, the operation of the liquid crystal display device 1 is controlled together with the decoder substrate 8B.

The power supply board 8A supplies necessary power to each part of the liquid crystal display 1, and is provided with a power transformer 81 having a large height (thickness of the liquid crystal display 1). The power transformer 81 is provided at a position substantially overlapping the gate substrate 41 in plan view.

The lower case 9 includes the upper case 2 and the frame 5
And a connector portion 91 connected to the control board 7. Further, the side opening K is closed by the lid 29.

In the liquid crystal display device 1 of the present embodiment,
Power is supplied from the power supply substrate 7, and the liquid crystal display element 3 is driven by the gate substrate 41 and the source substrate 42 controlled by the control substrate 7, and the liquid crystal display element 3 is guided through the light guide plate 62 and the openings 51a, 61a. The display is performed by the emission of the backlight 61.

Here, the liquid crystal display device 1 of the present embodiment is
Around the opening 21 of the outer housing 2, a transparent substrate 3
The outer casing of the liquid crystal display element 3 is provided by providing a plurality of position regulating projections 22, 22 which abut on the end 32c of the second and regulate the position of the transparent substrate 32 on the rear surface side with respect to the opening 21. When positioning and attaching to 2
The positioning and fixing of the liquid crystal display element 3 can be performed mainly by the rear transparent substrate 32 instead of the front transparent substrate 31. Therefore, the front transparent substrate 31 is inserted into the opening 21 of the upper case (outer housing) 2, and the vicinity of the opening 21 and the transparent substrate 31 on the front side of the liquid crystal display element 3 are liquid crystal display. The liquid crystal display device 1 is positioned at substantially the same position in the thickness direction of the liquid crystal display device 1, and there is no need to include the thickness direction size of the upper case 2 outside the liquid crystal panel 3 in the thickness direction. In a state where the dimension in the thickness direction can be reduced by at least a dimension corresponding to the thickness of the transparent substrate 31 on the front side, even if the transparent substrate 31 on the front side is reduced in thickness.
Even when the thickness of the transparent substrate 31 is set to about 0.5 mm or less, the positioning and mounting and holding can be performed sufficiently without depending on the thickness of the transparent substrate 31 on the front side.

In this embodiment, the liquid crystal display device 1
Since the outer casing 2 and the liquid crystal display element 3 are not fixed in a state where a load is applied between the front transparent substrate 31 and the opening 21 of the upper case 2 in an assembling process or the like at the time of manufacturing,
Even if the end face 31c of the front transparent substrate 31 is in contact with the end (opening 21) of the outer casing 2, it is possible to prevent a load from being applied to the front transparent substrate 31 in the main surface direction. Therefore, 2
The possibility that the sealing of the liquid crystal sandwiched between the transparent substrates 31 and 32 is broken can be greatly reduced, and the possibility that the front transparent substrate 31 has an end face 31c such as a crack at the end face 31c is reduced. Which can be reduced
The cause of the malfunction can be reduced.

In the present embodiment, the corresponding position regulating protrusions 22 are located between the adjacent flexible wiring boards 33, 33, so that the transparent substrate 32 on the rear side of the liquid crystal panel 3 and the outer casing 2 When fixing and positioning the substrate, it is possible to prevent a load from being applied between the position regulating projections 22 and the transparent substrate 32 on the rear surface side via the flexible wiring substrate 33. Thereby, the possibility that the flexible wiring boards 33, 33 may be damaged can be reduced, and malfunctions and the like can be prevented. at the same time,
Even if the thickness of the transparent substrates 31 and 32 is reduced in order to reduce the thickness of the liquid crystal display device, it becomes difficult to position the front transparent substrate 31 by bringing the end 31c of the front transparent substrate 31 into contact with the opening 21.
The mounting positions of the flexible wiring boards 33, 33 in the peripheral direction of the rear side transparent substrate 32 (in one direction, in the longitudinal direction of the rear side transparent substrate 32), and the position regulating projections 22, 22 around the opening 21. Is set in a desired state, and the position regulating protrusions 22 corresponding to the positions defined between the adjacent flexible wiring boards 33, 33 are fixed at the corresponding positions, so that the rear surface When the upper transparent substrate 32 and the upper case 2 are attached to each other, a fixed position in the peripheral direction of the rear transparent substrate 32 (in part, in the longitudinal direction of the rear transparent substrate 32) can be set. At the same time, it is possible to improve the accuracy of the position where the rear transparent substrate 32 and the upper case 2 are fixed.

In the present embodiment, the position regulating protrusions 22 are formed integrally with the upper case (outer housing) 2 so that the position regulating protrusions can be simultaneously formed in the manufacturing process of the upper case 2. 22 and 22 can be formed, and the manufacturing process and manufacturing cost can be reduced, and the manufacturing time can be shortened as compared with the case where separate manufacturing processes are provided. Further, since the outer case 2 is manufactured by punching and bending a metal plate, the position regulating projections 22, 22 are formed in the same manufacturing process as the punching and bending of the metal plate serving as the upper case 2. Can be manufactured.

On the upper case 2 side of the transparent substrate 32 on the rear side, protective members for protecting the terminal portions 32b and the flexible wiring substrates 33, 33 are provided.
By providing the protective film 43 and the double-sided adhesive tape 44, the transparent wiring made of ITO or the like provided on the terminal portion 32b facing the upper case 2 and the flexible wiring boards 33, 33 connected thereto are damaged. These can be protected from such situations. For example, when assembling the liquid crystal display device 1, the terminal portion 32b and the flexible wiring boards 33, 33 and the upper case 2 come into direct contact with each other, or rub against each other, so that the rear side transparent substrate 32 or the flexible The possibility of damage to the wiring board 33 can be reduced. At the same time, the upper case 2, the terminal portion 32b, and the flexible wiring board 3
When a load is applied between the wirings 3 and 33, mechanical stress is generated, and it is possible to avoid problems such as disconnection at a connection portion between the terminal portion wiring and the flexible wiring board. Thereby, the reliability of the liquid crystal display device 1 can be improved. In particular, it is more effective when the thickness of the liquid crystal display device 1 is reduced with the reduction in thickness of the two transparent substrates 31 and 32.

In the present embodiment, for example, when the driving IC 35 is directly mounted on the flexible substrate 33, the driving IC 35 is mounted on the inner surface of the upper case (outer housing) 2 as shown in FIG. When the driving IC 35 is positioned near the terminal portion 32b, it can be prevented from contacting the upper case 2 by forming the concave portion 25 corresponding to the driving IC 35.

[0038]

According to the liquid crystal display device of the present invention, the rear transparent substrate is brought into contact with the edge of the rear transparent substrate around the opening of the outer casing and the rear transparent substrate with respect to the opening. By providing the position regulating convex portion for regulating the position, when positioning and mounting and fixing the liquid crystal display element to the outer casing, the positioning of the liquid crystal display element is mainly performed by the rear transparent substrate instead of the front transparent substrate. And mounting and fixing can be performed. Further, in the assembling process at the time of manufacturing, etc., the front transparent substrate and the outer casing are not fixed, and there is no possibility that the end face of the front transparent substrate receives a load from the end of the outer casing. Can be reduced. In addition, between the adjacent flexible wiring boards, the end of the rear-side transparent substrate and the position-controlling protrusion come into contact with each other, so that the position-controlling protrusion and the transparent substrate on the rear side of the liquid crystal display element. And the outer casing can be fixed and positioned, thereby improving the accuracy of the mounting and fixing position and preventing the operation reliability of the liquid crystal display device from lowering. Further, by adopting a means in which the position restricting convex portion is integrated with the outer housing, the position restricting convex portion can be formed at the time of manufacturing the outer housing. In comparison, the manufacturing process and manufacturing cost can be reduced, and the manufacturing time can be shortened.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a liquid crystal display device according to the present invention.

FIG. 2 is an exploded perspective view showing one embodiment of the liquid crystal display device according to the present invention.

FIG. 3 is a sectional view of a main part showing the liquid crystal display device of FIG. 1;

FIG. 4 is an enlarged perspective view showing an upper case (outer housing) 2 of FIG. 2;

FIG. 5 is a plan view showing an assembled state of the liquid crystal panel 3 and the upper case 2 of FIG.

FIG. 6 is a perspective view showing another configuration of an embodiment of the liquid crystal display device according to the present invention.

FIG. 7 is a cross-sectional view illustrating an example of a conventional liquid crystal display device.

FIG. 8 is a cross-sectional view illustrating another example of a conventional liquid crystal display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display device, 2 ... Upper case (outer housing), 3 ... Liquid crystal panel (liquid crystal display element), 4 ... Drive circuit board, 5 ... Frame part, 6 ... Backlight case, 7 ... Control board, 8A ... Power supply board, 8B: Decoder board, 9: Lower case (outer housing), 21: Opening, 22: Position regulating convex, 2
2a: end portion, 23: position setting portion, 25: concave portion, 31: front transparent substrate, 32: rear transparent substrate, 32b: terminal portion, 32c: end portion, 33: flexible wiring substrate (flexible wiring board) Wiring board), 35: drive IC, 43: protective film (protective member), 44: double-sided adhesive tape (protective member), 6
1. Backlight, K: Side opening

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H089 HA40 JA10 QA03 QA12 QA16 TA07 TA18 5C094 AA42 AA43 AA44 AA48 BA03 BA43 CA19 EB02 GB01 HA07 HA08 5G435 AA17 BB12 CC09 EE05 GG42 KK03 KK05 LL07

Claims (4)

[Claims] 1. A liquid crystal display device comprising a pair of transparent substrates opposed to each other with a liquid crystal layer interposed therebetween, a backlight disposed on the back side of the liquid crystal display device, and a driving circuit for driving the liquid crystal display device A substrate, and an outer casing in which the liquid crystal display element, the backlight, and the drive circuit board are housed and an opening for exposing a display area of the liquid crystal display element to the outside is provided. In the opening, the front-side transparent substrate of the pair of transparent substrates is inserted, and around the opening of the outer housing, at the end of the rear-side transparent substrate of the pair of transparent substrates. A liquid crystal display device comprising: a position regulating projection which abuts and regulates a position of the rear transparent substrate with respect to the opening. 2. The liquid crystal display device according to claim 1, wherein a terminal portion of the liquid crystal display element and a drive circuit on the drive circuit board are connected by a plurality of flexible wiring boards. 2. The liquid crystal display device according to claim 1, wherein an end of the transparent substrate on the side contacts the position regulating projection. 3. 3. The liquid crystal display device according to claim 1, wherein the position regulating projection is integrated with the outer housing. 4. A protective member for protecting the terminal portion and the flexible wiring board is provided on an outer housing side of the rear transparent substrate. The liquid crystal display device according to claim 1.