JPH11344937A - Liquid crystal display - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a liquid crystal display device in which an LCD panel can be easily removed from a case without being damaged. SOLUTION: In a liquid crystal display device 10 having a bottom plate 11 of a case and a lid 13 covering the bottom plate 11 of the case, an LCD panel 20 is fixed on a surface side of the bottom plate 11 by double-sided tapes 14 as fixing means. It is positioned and fixed via the fixed planar member 15. Planar member 1
5 is a projection 1 formed on the back surface side of the bottom plate 11 of the case of the liquid crystal display device 10 with a locking hole 17 formed at the end 15a.
8,... So as to be detachably fixed to the bottom plate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display having a liquid crystal panel.

[0002]

2. Description of the Related Art Conventionally, LCD (liquid crystal displa)
The LCD panel, which is a main component of y), is placed in its case (in addition to the case of a display alone, there may be a case of an electronic device such as a PDA (Personal degital Asistant) or a pager having a liquid crystal display). , Are fixed as shown in FIG. That is, the walls 2, 2 are provided on the upper surface of the bottom plate (lower case) 3 of the case so as to surround the LCD panel (liquid crystal panel) 4, and the LCD panel 4 is surrounded by the walls 2, 2 of the case. The LCD panel 4 is disposed on the bottom plate 3 and the LCD panel 4 is fixed to the bottom plate 3 of the case with double-sided tape 5.

The walls 2 and 2 are for positioning the LCD panel 4 and restricting the horizontal movement of the LCD panel 4.
With the horizontal movement of the panel 4 regulated, the LCD panel 4 is fixed by sandwiching the LCD panel 4 between the bottom plate 3 and the lid by a case lid (upper case) attached to the bottom plate 3 of the case from above. In some cases. In this case, the LCD panel 4 is fixed by the walls 2 and 2 so as not to move in the horizontal direction, and is fixed between the bottom plate 3 and the lid so as not to move in the vertical direction. When there is not enough space in the mounting space to form a wall, the LCD panel 4 may be fixed to the bottom plate 3 of the case with only the double-sided tape 5 without providing the walls 2 and 2 on the bottom plate 3 of the case. .

[0004]

By the way, in the case of repairing or replacing various parts of the liquid crystal display device, the liquid crystal display device is disassembled and the LCD panel 4 is removed from the bottom plate 3 of the case. There are cases. At this time, in the fixing structure of the LCD panel 4 using the double-sided tape 5,
Since the rectangular LCD panel 4 and the bottom plate 3 of the case are fixed with at least two sides of the LCD panel 4 via the double-sided tapes 5 and 5 with almost no gap, the gap between the LCD panel 4 and the bottom plate 3 of the case is obtained. It is difficult to make jigs and fingers intervene, and it is difficult to peel them off. In addition, since both the LCD panel 4 and the case have some rigidity, it takes time to peel off the double-sided tape 5 so as not to damage each component due to distortion or deformation when peeling off.

[0005] Further, the bottom plate 3 of the case
When the periphery of the LCD panel 4 joined to the LCD panel 4 is surrounded by the walls 2, 2, it becomes more difficult to peel the LCD panel 4 from the bottom plate 3 of the case. When the LCD panel 4 is fixed by sandwiching the walls 2 and 2 with the upper and lower cases without using the double-sided tape 5, the LCD panel 4 does not shift in the vertical direction. Since a certain amount of clearance must be provided in advance with the LCD panel 4 in consideration of the dimensional change due to the tolerance of each component and environmental conditions, etc.
The CD panel 4 has a degree of freedom in movement by the clearance, and the LCD panel 4 may be misaligned when the LCD panel 4 is positioned and assembled into the case or after the LCD panel 4 is assembled. Further, if the double-sided tape 5 is used in combination to prevent such a displacement, the above-described problem occurs.

An object of the present invention is to provide a liquid crystal display device in which an LCD panel can be easily removed from a case.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to claim 1 is a liquid crystal display device having a case and a liquid crystal panel positioned and fixed in the case. Is characterized in that it is detachably fixed to a planar member by fixing means, and the planar member is detachably mounted on the case.

According to the first aspect of the present invention, the liquid crystal panel is detachably fixed to the sheet member by the fixing means, and the sheet member is detachably attached to the case. Since the liquid crystal panel is fixed to the planar member because the liquid crystal panel is fixed to the case, the planar member is removed from the case, and then the planar member and the liquid crystal panel are grasped. By peeling off, the liquid crystal panel can be removed from the planar member. Therefore, when disassembling work such as removing the liquid crystal panel from the case, for example, when repairing or replacing various parts of the liquid crystal display device, it is possible to easily remove the liquid crystal panel from the case without damaging the liquid crystal panel. it can.

The planar member may be of any type as long as it is planar. For example, a plate-like material may be used, but polycarbonate (PC: policarbonate), polyethylene terephthalate (PET: polyethylene terep
hthalate), vinyl chloride, polyester (polyester)
It is preferable to be molded with a flexible material such as. The fixing means may have any configuration as long as it can removably fix the liquid crystal panel to the planar member, such as a double-sided tape.

According to a second aspect of the present invention, in the liquid crystal display device of the first aspect, the planar member has flexibility.

According to the second aspect of the invention, the same effect as that of the first aspect can be obtained, and the planar member to which the liquid crystal panel is detachably attached has flexibility. Since the sheet member has the sheet member, the sheet member can be bent when the liquid crystal panel is detached from the sheet member, and the sheet member can be easily peeled off from the liquid crystal panel by the bending. Further, when attaching and detaching the planar member from the case, the planar member can be bent, so that the attachment and detachment can be easily performed.

The planar member is made of PC, P
ET, vinyl chloride, polyester, or the like is preferably used as the material.

According to a third aspect of the present invention, in the liquid crystal display device of the second aspect, a projection is formed on the case,
The planar member is characterized in that a locking hole which is inserted into the projection and is engaged with the projection is formed.

According to the third aspect of the present invention, the same effects as those of the second aspect of the invention can be obtained, and the planar member has a projection formed on the case and the locking hole is provided outside. By being inserted and engaged, it is configured to be detachably locked to the case, so only by inserting the projection into the locking hole, the liquid crystal panel fixed to the planar member is The case is positioned and fixed to the case.

According to a fourth aspect of the present invention, in the liquid crystal display device according to the third aspect, a surface of a bottom portion of the case is provided.
The liquid crystal panel is disposed via the planar member, the protrusion is formed on the back side of the bottom, and the locking hole is formed at an end of the planar member. The locking hole is locked to the projection so as to wrap around from the side edge of the bottom.

According to the fourth aspect of the present invention, the same effect as that of the third aspect of the invention can be obtained, and at the same time, the flat member is inserted into the locking hole to lock the locking hole. Since the projections are provided on the back side of the bottom, when the liquid crystal panel is provided on the front side of the bottom, the space for forming the projections on the front side of the bottom is unnecessary, and the liquid crystal display device is narrow. This is extremely advantageous for frame making.

The invention according to claim 5 is the invention according to claim 3 or 4.
In the liquid crystal display device according to the aspect, the case includes a bottom portion that fixes the liquid crystal panel, and a lid portion that covers the bottom portion. The protrusion is formed on the bottom portion of the case, and the lid portion is formed between the bottom portion and the bottom portion. It is characterized in that the projection is locked to the projection with the planar member interposed therebetween.

According to the fifth aspect of the invention, the same effects as those of the third or fourth aspect of the invention can be obtained, and the lid, which forms the case together with the bottom, has a locking hole for the planar member. Is locked from above the planar member to the projection that is extrapolated and engaged, so that the lid portion is on the planar member in a state where the locking hole is locked to the projection. As a result, the planar member is sandwiched between the lid and the bottom, and the planar member does not come off.
Therefore, the planar member is detachably fixed at a predetermined position in the case, and can be easily attached and detached and does not shift from the fixed position.

Specifically, the configuration in which the lid is locked to the projection means that a hole is formed in the lid to insert the projection of the bottom plate, and the projection is inserted into the hole. By doing so, the lid may be in a state of being locked by the projection.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid crystal display device according to the present invention will be described below in detail with reference to FIGS.
FIG. 1 and FIG. 2 are views showing a first embodiment of a liquid crystal display device to which the present invention is applied.

First, the configuration will be described. FIG. 1 is a schematic longitudinal sectional view for explaining a fixing structure of an LCD panel in a liquid crystal display device to which the present invention is applied, and FIG. 2 is a side view of the planar member for explaining how to remove the LCD panel from the planar member. FIG.

As shown in FIG. 1, a liquid crystal display device 10 according to a first embodiment of the present invention has an LCD panel (liquid crystal panel) positioned and fixed inside a case of the liquid crystal display device 10. 20 are accommodated. The case of the liquid crystal display device 10 has a bottom plate (bottom portion) 11 and a lid (cover portion) 13 that covers the bottom plate 11 of the case. An LCD panel 20 is fixed to the surface (top surface) of the bottom plate 11. It is fixed to the sheet member 15 by means of double-sided tapes 14, 14, and is fixedly installed via the sheet member 15.

The bottom plate 11 of the case of the liquid crystal display device 10
Has a square shape, and projections 18,
… Stands upright. Also, the end 15a of the planar member 15
A locking hole 17 is formed on the projection 18 so as to be inserted into the projection 18. The planar member 15 is bent around the surface of the side edge 12 of the bottom plate 11 so that the locking hole 17 is inserted into the projection 18. By doing so, it is locked to the bottom plate 11. Lid 13
Has an opening 13a at the upper part and a locking part 13b at the lower part for locking the projection 18 provided on the back surface of the bottom plate 11 from above the planar member 15.

The LCD panel 20 has a quadrangular shape in plan view, is formed in substantially the same size as the fixed bottom plate 11, and includes, for example, two transparent substrates having electrodes for applying a voltage to the liquid crystal on the inner surface. And a polarizing plate provided on the outer surface of the transparent substrate, and a reflective plate or a backlight is provided on the back surface. This LCD
The surface of the panel 20 faces outside through the opening 13a of the lid 13. On the back surface of the LCD panel 20, double-sided tapes 14 are adhered along two sides parallel to each other, and the LCD panel 20 is detached from the sheet member 15 via the double-sided tapes 14, 14. It is fixed as possible.

The planar member 15 is flexible, and is wider than the LCD panel 20.
A is provided with a locking hole 17. This planar member 15
Is bent so that the end portion 15a extends from the side edge portion 12 of the bottom plate 11 to the back surface side of the bottom plate 11. The locking hole 17 formed in the wrapped end portion 15a is
The planar member 15 is locked to the bottom plate 11 by being externally inserted into a projection 18 provided on the back surface of the bottom plate 11. As described above, the planar member 15 is provided at the end 15 a of the planar member 15.
The locking hole 17 formed in the bottom plate 11 is locked by simply extrapolating the locking hole 17 formed in the projection 18 into the locking hole 1.
The sheet member 15 can be removed from the bottom plate 11 simply by detaching the 7. Also, when mounting, simply by inserting the locking hole 17 into the projection 18, the locking hole 17 is
And the planar member 15 is locked to the bottom plate 11. The projections 18 are columnar formed at four corners of the bottom plate 11, and the locking holes 17 are formed in the planar member 15 corresponding to the projections 18.

One of these locking holes 17,... Is a hole having a size such that a columnar projection 18 is just fitted therein, and the remaining locking hole 17 has a diameter of the projection 18 to be fitted therein. It is a long hole having almost the same width as. (The illustration is omitted.) Since the remaining three are elongated holes, when the planar member 15 is attached to the bottom plate 11, first, the projection holes 18 correspond to the engagement holes 17 having a size just inside. By extrapolating to the projections 18, the other remaining locking holes 17 with play can be easily extrapolated to the corresponding projections 18. The distal end of the projection 18 penetrating through the locking hole 17 is fitted inside a hole 19 formed in the locking portion 13b below the lid 13. Thus, the lid 13 is fixed to the bottom plate 11 by fitting the projection 18 into the hole 19. The LCD panel 20 is located between the upper part of the lid 13 where the opening is formed and the lower part having the locking part 13b.
, The planar member 15 and the LCD panel 20
Is covered with the double-sided tape 14 and the bottom plate 11 adhered to the respective side edges. As described above, in the present embodiment, since the projection 18 for locking the planar member 15 is provided upright on the back surface of the bottom plate 11, a dedicated space for providing the projection 18 becomes unnecessary, and the narrowness of the liquid crystal display device is reduced. This is extremely advantageous for frame making.

Next, a method of assembling the liquid crystal display device 10 configured as described above will be described. L via double-sided tape 14
By bending the end portion 15a of the planar member 15 detachably attached to the back surface of the CD panel 20, the locking hole 17 of the end portion 15a is externally inserted into the projection 18 of the bottom plate 11 of the case, respectively. The planar member 15 is detachably locked to the bottom plate 11, and the LCD panel 20 is fixed to the bottom plate 11. At this time, since the mounting position of the planar member 15 is determined in advance by the projection 18, the fixing position of the LCD panel 20 mounted on the planar member 15 can also be predetermined.

Then, the hole 19 of the locking portion 13b of the lid 13 is fitted to the projection 18 of the bottom plate 11 that has penetrated the locking hole 17 of the planar member 15. At this time, the upper part of the lid 13 is
The panel 20 is attached so as to cover the bottom plate 11 to which the panel 20 is fixed, and to be sandwiched between the upper part of the lid 13 and the locking portion 13b of the lid 13. By attaching the lid 13 to the bottom plate 11 in this way, the fixing of the LCD panel 20 to the bottom plate 11 can be further strengthened, and the planar member 15 is connected to the bottom plate 11 and the lid 13 at its end 15a. Of the LCD panel 20 will not be disengaged unless the lid 13 is removed from the bottom plate 11 and the fixed position of the LCD panel 20 does not shift in the case.

Since the liquid crystal display device 10 of the present embodiment is configured as described above, for example, the LCD panel 2
When the maintenance of the LCD panel 20 is performed,
When the LCD panel 20 is repaired or when the LCD panel 20 is replaced, the LCD panel 20 is attached to the bottom plate 11 of the case.
If it is necessary to remove from the hole 18 first,
Then, the lid 13 is removed from the bottom plate 11 by removing the cover 13. Then, by removing the locking hole 17 of the planar member 15 from the projection 18, the planar member 15 to which the LCD panel 20 is fixed can be removed from the bottom plate 11.

Then, when the sheet member 15 is removed from the bottom plate 11, as shown in FIG. 2, the sheet member 15 and the LCD panel 20 fixed to the sheet member 15 with the double-sided tape 14 are respectively gripped. From the planar member 15
The CD panel 20 can be peeled off. At this time, since the planar member 15 is flexible, it can be easily peeled off from the planar member 15 without being damaged by pulling in the direction of the arrow in the drawing while bending. it can. As described above, the LCD panel 20 is separated from the bottom plate 11.
Can be easily removed, so that the bottom plate 11 and L
The possibility of damaging the CD panel 20 is extremely low, and disassembly work such as removing the LCD panel 20 from the bottom plate 11 of the case can be easily performed.

FIG. 3 is a view for explaining a liquid crystal display device according to a second embodiment of the present invention. FIG. 3 (a) is a developed sectional view of a liquid crystal display device 50 according to the second embodiment.
(B) is sectional drawing after assembling of the same liquid crystal display device.

As shown in FIG. 3B, a liquid crystal display device 50 according to a second embodiment of the present invention is
LCD fixed to the case inside the case
A panel (liquid crystal panel) 20 is accommodated.

The case of the liquid crystal display device 50 covers a bottom plate (bottom portion) 51 and the bottom plate 51 of the case.
A lid (lid part) 55 having an opening 55a formed on its surface 58 so that the surface of the LCD panel 20 accommodated faces the outside.

On the surface (upper surface) side of the bottom plate 51, L
The CD panel 20 is provided with double-sided tapes 14 and 1 as fixing means.
4 and is fixed via a planar member 21 fixed by 4. The LCD panel (liquid crystal panel) shown in this figure
20 and the double-sided tape (fixing means) 14
This is the same as that in the embodiment, the same reference numerals are given, and the description thereof is omitted. The planar member 21 has a surface area larger than that of the LCD panel 20 to be fixed, and has a locking hole 17 formed at an end thereof. Therefore, the description is omitted.

The bottom plate 51 of the case of the liquid crystal display device 50 is
It is formed in a square shape in plan view, has a larger surface area than the LCD panel 20 fixed to the surface via the planar member 21, and has a larger peripheral area than the LCD panel 20.
The periphery of the bottom plate 51 is in a state of protruding to each side. On the periphery of the bottom plate 51 protruding from the LCD panel 20 fixed to the surface, columnar projections 53,... This projection 5
, Respectively penetrate through the locking holes 17,... Of the planar member 21, and the planar member 21 and the projections 53,.
Through the bottom plate 51. The projections 53 penetrating through the locking holes 17 are inserted into insertion holes 56 formed in the lid 55, respectively.

The lid 55 is provided at the lower part with the side edge 5 of the bottom plate 51.
A claw portion 57 locked to the back surface of the bottom plate 1b, and a housing portion 59 is formed between the claw portion 57 and the insertion hole 56, which is opened inside the lid 55 and in which the side edge portion 51b of the bottom plate 51 is fitted. Have been. The claw portion 57 is locked to the back surface of the side edge portion 51b of the bottom plate 51, and the claw portion 57 sandwiches the bottom plate 51 to which the LCD panel 20 is fixed from below and above with the front surface portion 58 having the opening 55a. As a result, the lid 55 is
It is in a state fixed to.

In the liquid crystal display device 50 having the above-described configuration, the planar member 21 to which the LCD panel 20 is fixed has the locking hole 17 formed at the end 21 a inserted into the projection 53. As a result, it is fixed in a state of being locked to the bottom plate 51. In addition, this planar member 21
Is firmly fixed in a state of being sandwiched between the bottom plate 51 and the lid 55 at the end 21 a, so that the planar member 21 cannot be removed from the bottom plate 51 unless the lid 55 is removed from the bottom plate 51. ing.

In the liquid crystal display device 50, L
To attach the CD panel 20 to the bottom plate 51 of the case,
As shown in FIG. 3A, the planar member 21 to which the LCD panel 20 is detachably fixed via the double-sided tapes 14, 14 is attached to the front side of the bottom plate 51. At this time, a columnar projection 53 erected on the surface of the bottom plate 51.
Then, by passing the corresponding locking holes 17 of the planar member 21, the locking holes 17 are locked by the projections 53, and the LCD panel 20 fixed to the planar member 21 is formed.
Are positioned and fixed on the surface of the bottom plate 51.

A lid 55 is attached to the bottom plate 51 to which the LCD panel 20 is fixed as described above so as to cover the bottom plate 51 from above. At this time, on the surface of the bottom plate 51, the projection 53 penetrating through the locking hole 17 of the sheet member 21 is inserted into the insertion hole 56 of the lid 55, and the claw 57 is inserted into the side edge portion 51 b of the bottom plate 51.
To the back of Thus, the projection 53 is inserted into the insertion hole 56.
When the claw portion 57 is engaged with the back surface of the side edge portion 51 b of the bottom plate 51, the side edge portion 51 b of the bottom plate 51 is
Are fitted inside, the bottom plate 51 and the lid 55 are fixed, and the position of the LCD panel 20 fixed to the bottom plate 51 does not shift.

The locking hole 17 inserted into the projection 53
Are formed at predetermined positions on the end portions 21a of the planar member as described above, and correspond to the arrangement positions of the projections 53 formed on the bottom plate 51. Like the planar member 15 in the first embodiment described above, the shape of the locking hole 17 is such that one is large enough to insert the projection 53, and the other three The stop hole 17 is a long hole. This operation and effect is the same as the operation and effect of the locking hole 17 in the above-described first embodiment.

When the LCD panel 20 is detached from the bottom plate 51 of the case in the liquid crystal display device 50 configured as described above, the engagement of the claw 57 locked on the bottom plate 51 is released, and the lid 55 is removed. Is removed from the bottom plate 51, and the LCD panel 20 is pulled up above the bottom plate 51, so that the LCD
The panel 20 and the planar member 21 to which the LCD panel 20 is fixed can be easily removed.

Then, the planar member 21 and the LCD panel 20 thus removed are gripped and peeled off, respectively, as described with reference to FIG. At this time, since the planar member 21 has flexibility, the planar member 21 can be easily separated from the LCD panel 20 by bending.

The planar shapes of the LCD panel and the case are not limited to the shapes described in the above embodiment, but may be any configuration as long as the LCD panel is fixed to the case. You may. In addition, it is needless to say that specific detailed structures and the like can be appropriately changed.

[0044]

As described above, according to the liquid crystal display device of the first aspect of the invention, the planar member is removed from the case with the liquid crystal panel fixed to the planar member. After that, the sheet member and the liquid crystal panel are gripped and peeled, respectively, and the liquid crystal panel can be removed from the sheet member, and disassembly work such as removing the liquid crystal panel from the case at the time of repairing the liquid crystal panel or the like. In this case, the liquid crystal panel can be easily removed from the case without damaging the liquid crystal panel.

According to the liquid crystal display device according to the second aspect of the present invention, the same effects as those of the first aspect of the invention can be obtained, and the planar state in which the liquid crystal panel is detachably attached. Since the member has flexibility, the planar member can be bent when removing the liquid crystal panel from the planar member, and the flexure pulls the planar member from the liquid crystal panel more easily. Can be peeled off. Also, when attaching and detaching the planar member from the case, the planar member can be bent,
It can be easily attached and detached.

Further, according to the liquid crystal display device according to the third aspect of the invention, the same effects as those of the second aspect of the invention can be obtained, and the planar member is formed by a projection formed on the case. Since the locking hole is externally engaged with the locking hole, the locking hole is detachably locked to the case, so only by inserting the protrusion into the locking hole,
The liquid crystal panel fixed to the planar member is positioned and fixed to the case.

According to the liquid crystal display device according to the fourth aspect of the present invention, the same effect as that of the third aspect of the invention can be obtained, and the projection inserted into the locking hole of the planar member can be obtained. Is provided on the back side of the bottom,
When the liquid crystal panel is provided on the front side of the bottom, the planar member can be detachably engaged with the bottom even if there is no space for forming the projection on the front side of the bottom. Therefore, a dedicated space for providing the projection is not required, which is extremely advantageous for narrowing the frame of the liquid crystal display device.

According to the liquid crystal display device according to the fifth aspect of the present invention, the same effect as that of the third or fourth aspect of the invention can be obtained, and the lid that constitutes the case together with the bottom is provided with the lid. Since the locking holes of the planar member are locked to the projections locked on the planar member, the projections are locked on the planar member in a state where the locking holes are locked to the projections. The lid portion is located at the position, the lid portion and the bottom portion sandwich the planar member, the planar member does not come off, and the planar member is located at a predetermined position in the case. , Which is removably fixed to the camera and does not deviate from the fixed position.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view illustrating a fixing structure of an LCD panel in a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a side view of the planar member for explaining how to remove the LCD panel from the planar member in the first embodiment of FIG.

FIGS. 3A and 3B are diagrams for explaining a second embodiment of the liquid crystal display device according to the present invention, wherein FIG. 3A is an expanded sectional view of the liquid crystal display device 50 according to the second embodiment, and FIG. FIG. 3 is a sectional view of the liquid crystal display device after assembly.

FIG. 4 is a schematic cross-sectional view of a liquid crystal display device having a conventional liquid crystal panel, illustrating a fixing structure of the liquid crystal panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Liquid crystal display device 11 Bottom plate 12 Side edge of bottom plate 13 Lid (lid part) 13a Opening 13b Locking part 14 Double-sided tape (fixing means) 15 Surface member 15a End of surface member 17 Locking hole 18 Projection 20 LCD panel (liquid crystal panel) 21 planar member 21a end of planar member 50 liquid crystal display device 51b side edge of bottom plate 51 bottom plate 53 projection 55 lid 56 insertion hole 57 claw portion

Claims (5)

[Claims] 1. A liquid crystal display device having a case and a liquid crystal panel positioned and fixed in the case, wherein the liquid crystal panel is detachably fixed to a sheet member by a fixing means, and the sheet member is A liquid crystal display device detachably mounted on the case. 2. The liquid crystal display device according to claim 1, wherein said planar member has flexibility. 3. The case is provided with a projection, and the planar member is formed with a locking hole that is inserted into the projection and is engaged with the projection. 3. The liquid crystal display device according to 2. 4. The liquid crystal panel is disposed on the front side of the bottom of the case via the planar member, the protrusion is formed on the rear side of the bottom, and an end of the planar member. The liquid crystal according to claim 3, wherein the locking hole is formed in the liquid crystal panel, and the planar member wraps around from a side edge of the bottom portion, and the locking hole is engaged with the projection. Display device. 5. The case comprises: a bottom for fixing the liquid crystal panel; and a lid for covering the bottom. The projection is formed on a bottom of the case, and the lid is between the bottom and the bottom. The liquid crystal display device according to claim 3, wherein the projection is locked to the projection while sandwiching the planar member.