JP5392651B2 - Electro-optic display device and manufacturing method thereof - Google Patents

Description

The present invention relates to an electro-optic display device, and more particularly, to an electro-optic display device in which a fixture disposed in a fitting gap of an electro-optic display panel is deformed by being pressed by an inclined surface of an outer frame, and a manufacturing method thereof. Is.

Various electro-optical display devices such as a liquid crystal display device, an organic electroluminescence (EL) display device, an inorganic EL display device, a plasma display device, a light emitting diode (LED) display device, and a field emission display device are known. ing. Among these electro-optic display devices, liquid crystal display devices, in particular, are lighter, thinner and have lower power consumption than CRTs (cathode ray tubes), and thus are used in many electronic devices for display purposes. The liquid crystal display device displays an image by changing the amount of light passing through the liquid crystal layer by changing the direction of liquid crystal molecules aligned in a predetermined direction by an electric field by rubbing the alignment film. is there. The light source incident on the liquid crystal layer includes external light in a reflective liquid crystal display device and a backlight in a transmissive liquid crystal display device. A reflective liquid crystal display device has advantages in that it is excellent in power saving and has high visibility under external light, and a transmissive liquid crystal display device has advantages in high visibility in a dark environment. A transflective liquid crystal display device having both the properties of a reflective liquid crystal display device and a transmissive liquid crystal display device is also known. Currently, a transmissive or transflective liquid crystal display device is often used as a liquid crystal display device because of its high visibility even in a dark environment.

FIG. 8A is an exploded perspective view showing a configuration of a main part of a conventional transmissive or transflective liquid crystal display device 50. The liquid crystal display device 50 includes a backlight unit 52 on the back surface of the liquid crystal display panel 51.
Is arranged. A liquid crystal display panel 51 side of the backlight unit 52 is an inner frame 53. The inner frame 53 has a frame shape, and has a large rectangular opening 53a through which light from the backlight unit 52 passes. The outer frame 54 is fitted to the inner frame 53 so that the liquid crystal display panel 51 is sandwiched between the outer frame 54 and the inner frame 53.

A fitting gap is provided between the inner frame 53 and the liquid crystal display panel 51 in the XYZ axial directions. This fitting gap takes into account the dimensional tolerance of the parts and the difference between the linear expansion coefficients (the dimensional difference between expansion and contraction due to temperature change). In particular, when the inner frame 53 is formed of a synthetic resin, a large gap is required, and when the liquid crystal display device is mounted on a vehicle or the like, −40 ° C. to + 85 ° C.
Since it must be designed to withstand the in-vehicle temperature that reaches about ℃, a large fitting gap is required. In view of this, in the liquid crystal display device disclosed in Patent Document 1 below, the liquid crystal display panel 51 is used to prevent the liquid crystal display panel 51 from moving within the fitting gap and to position the liquid crystal display panel 51. The double-sided tape 55 is fixed to the frame region of the frame 53 or the peripheral portion of the outer frame 54.

JP 2009-042340 A

However, as disclosed in Patent Document 1, when the liquid crystal display panel is fixed to the inner frame or the outer frame using a double-sided tape, the above-described problem can be solved, but another problem newly arises. It becomes like this. That is, the inner frame and the outer frame have a frame-like shape having a large space in the center, and deformation that impairs flatness such as torsion is large. This deformation occurs largely when the inner frame and the outer frame are synthetic resin injection-molded products, and also occurs when the inner frame and the outer frame are sheet metal pressed products and bent products. If the liquid crystal display panel is fixed to the deformed inner frame or outer frame with double-sided tape, the liquid crystal display panel is subjected to stress due to the deformed inner frame or outer frame. White display unevenness occurs at the peripheral edge of the display panel.

Further, for example, when a stress is applied to the inner frame such as when a casing that engages with the inner frame is screwed with a screw, the liquid crystal display panel fixed to the inner frame is also stressed. Furthermore, the liquid crystal display panel has F
A PC (flexible printed wiring) substrate is connected. When this FPC substrate is fixed to the housing of the liquid crystal display device with double-sided tape or connected to an external controller substrate, stress such as tension is applied to the FPC substrate. It takes. For this reason, if the liquid crystal display panel is fixed to the inner frame, the stress applied to the FPC board cannot be relieved, so the stress applied to the FPC board is directly applied to the liquid crystal display panel, and the liquid crystal display panel is deformed. As a result, the alignment of the liquid crystal in the vicinity of the connection portion of the FPC board may be disturbed, and white display unevenness may occur along the FPC board.

In addition, if the LCD panel is fixed to the inner or outer frame using double-sided tape, the LCD panel may be damaged when the LCD panel is removed from the inner or outer frame for repair. There is a risk of deformation of the inner frame and the outer frame. As shown in FIG. 8B, when the liquid crystal display panel 51 is fixed to the inner frame 53 using the double-sided tape 55, the liquid crystal display panel 51 is tilted while using the positioning ribs 56 in the short direction of the inner frame 53 as a guide. If the liquid crystal display panel 51 is displaced when the liquid crystal display panel 51 is assembled, the one side of the liquid crystal display panel 51 is fixed by the double-sided tape 55, so that it is difficult to correct the displacement and the inner frame 53 extends in the short direction. If the liquid crystal display panel 51 hits the positioning rib 56, the rib 56 and the liquid crystal display panel 51 may be damaged.

In addition, the above-mentioned problem is that electro-optic display panels such as organic EL display panels, inorganic EL display panels, plasma display panels, LED display panels, and field emission display panels are attached to inner and outer frames using double-sided tape. This is also a problem that occurs in the same way even when fixed.

The present invention has been made in view of the above-mentioned problems of the prior art, and is an electro-optic display that reduces display defects and damage to parts caused by the fixing method of the electro-optic display panel. An object is to provide an apparatus and a method for manufacturing the same.

In order to achieve the above object, an electro-optic display device of the present invention is provided with:
An electro-optical display device having an outer frame provided on the display surface side of the electro-optical display panel that is housed with the electro-optical display panel interposed therebetween, and a bottom case provided on the side opposite to the display surface side of the electro-optical display panel Because
A fixture that can be deformed by pressure is disposed on a side surface of the electro-optic display panel,
The outer frame is provided with an inclined surface at a position in contact with the fixture,
The outer frame and the bottom case are fixed to each other in a state where the fixing tool is pressed by the inclined surface of the outer frame and is in contact with the display surface side and the side surface side of the electro-optic display panel. To do.

In the electro-optical display device according to the present invention, the electro-optical display panel includes the outer frame and the bottom in a state where the fixture is pressed by the inclined surface of the outer frame and is in contact with the display surface side and the side surface side of the electro-optical display panel. Since the cases are fixed to each other, the display surface side of the electro-optical display panel is not in direct contact with the outer frame, and it is not necessary to fix the electro-optical display panel to the inner frame or the outer frame with double-sided tape. Therefore, according to the electro-optic display device of the present invention, the stress in the thickness direction due to the deformation of the inner frame and the outer frame is suppressed from being applied to the electro-optic display panel, and the liquid crystal caused by the deformation of the inner frame and the outer frame is suppressed. It is possible to reduce the occurrence of white display unevenness due to the disorder of the orientation. In addition, according to the electro-optic display device of the present invention, the electro-optic display panel does not need to be fixed to the inner frame or the outer frame with a double-sided tape. When the electro-optical display panel is removed for repair, the parts are not damaged due to the fixing by the double-sided tape as in the prior art.

In the electro-optical display device of the present invention, pressure is applied to the two directions, ie, a direction parallel to the display surface of the electro-optical display panel and a direction perpendicular to the display surface of the electro-optical display panel by the inclined surface of the outer frame. As a result, the deformed portion of the fixture enters the fitting gap of the electro-optic display panel, and the electro-optic display panel is held by the force from two directions and positioned by the force from the two directions. In addition, when attaching the outer frame to the bottom case, the inclined surface of the outer frame can press the fixing tool at the same time, so that it is not necessary to add a special pressurizing operation for pressing the fixing tool.

In the electro-optic display device according to the aspect of the invention, it is preferable that the fixture is disposed on at least one pair of sides facing each other on the side surface of the electro-optic display panel.

Even if only one fixture is used, pressure can be applied in a direction parallel to and a direction perpendicular to the side where the fixture is disposed. According to the electro-optical display device of the present invention, the fixture is disposed on at least one pair of opposing sides of the side surface of the electro-optical display panel, and therefore more accurately with respect to the direction perpendicular to the positioning of the electro-optical display panel. Can be held under pressure.

In the electro-optic display device of the present invention, the fixture extends partially on the surface of the electro-optic display panel, and the outer frame includes the display surface of the electro-optic display panel and the fixture. It is preferable that they are in contact with each other.

According to the electro-optic display device of the present invention, since the fixture extends partially on the surface of the electro-optic display panel, it becomes difficult for the outer frame and the electro-optic display panel to come into contact with each other. Since stress is not directly applied to the display surface of the display panel, an electro-optic display device with good display image quality can be obtained.

In the electro-optical display device according to the aspect of the invention, it is preferable that the outer frame is a box shape having an opening at a central portion, and the inclined surface is formed on a ridge of the box shape.

According to the electro-optic display device of the present invention, since the inclined surface is formed at the ridge, even if the outer frame is manufactured by a sheet metal press-molded product or a die-cast method, an extruded product of a synthetic resin material Even so, the deformation strength of the side wall of the outer frame is improved. Further, if the inclined surface is formed by drawing or reinforcing ribs, the deformation strength of the side wall of the outer frame is further improved.

In the electro-optical display device of the present invention, it is preferable that the fixture has a rectangular parallelepiped shape.

According to the electro-optical display device of the present invention, the fixture can be formed only by cutting the plate or wire of the fixture-forming material, so that it can be easily and inexpensively formed.

In the electro-optical display device of the present invention, it is preferable that the fixture is made of an elastic material.

Since the fixture used in the electro-optical display device of the present invention is made of an elastic material, it can absorb the expansion / contraction of each component of the electro-optical display device due to a temperature change and a change in dimensions due to an external force. . Therefore, according to the electro-optic display device of the present invention, it is possible to obtain an electro-optic display device that can obtain good display image quality over a wide temperature range.

In the electro-optical display device of the present invention, the electro-optical display panel is a liquid crystal display panel, and a light guide plate is disposed between the bottom case and the liquid crystal display panel, and the liquid crystal display panel and the light guide are arranged. The light plate can be fixed by the fixture.

According to the electro-optical display device of the present invention, since the fixture also serves as a holding member for the light guide plate, it is possible to reduce the number of members for manufacturing a liquid crystal display device as an electro-optical display device and the number of manufacturing steps. become able to.

Furthermore, in order to achieve the above object, a method for manufacturing an electro-optical display device of the present invention includes:
A method of manufacturing an electro-optic display device having an outer frame on the front side and a bottom case on the back side, which are housed with an electro-optic display panel interposed therebetween,
Arranging the electro-optic display panel in the bottom case;
Disposing at least a pair of pressurizable deformable fixtures between the electro-optic display panel and a side wall of the bottom case;
Attaching the outer frame formed with an inclined surface for pressing the fixture to the outer surface of the inner frame so that the fixture is pressed against the display surface side and the side surface of the electro-optic display panel;
It is characterized by having.

According to the method for manufacturing an electro-optical display device of the present invention, the electro-optical display device of the present invention that exhibits the above-described effects can be easily produced.

1A is a perspective view of the liquid crystal display device according to the first embodiment, and FIG. 1B is a perspective view of a state in which the outer frame of FIG. 1A is removed. 1 is an exploded perspective view of a liquid crystal display device according to a first embodiment. FIG. 3A is a plan view showing an arrangement position of the fixture according to the first embodiment, and FIG. 3B is a cross-sectional view taken along line IIIB-IIIB in FIG. 3A. FIG. 4A is a cross-sectional view showing a state before attachment of the fixture along the line IVA-IVA in FIG. 3A, and FIG. 4B is a cross-sectional view after attachment of the fixture along the line IVA-IVA in FIG. 3A. It is sectional drawing of the VV line of FIG. 3A. 6A to 6D are plan views showing first to fourth modifications of the first embodiment, respectively. FIG. 7A is a plan view showing an arrangement position of the fixing device according to the second embodiment, FIG. 7B is a cross-sectional view before attaching the fixing device along the line VIIB-VIIB in FIG. 7A, and FIG. It is sectional drawing which shows the attachment after the fixing tool in the VIIC-VIIC line | wire. FIG. 8A is an exploded perspective view of a conventional liquid crystal display device, and FIG. 8B is a perspective view showing a state in which a liquid crystal panel is attached.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for carrying out the present invention will be described below with reference to the embodiments and drawings taking the case of a liquid crystal display device as an example. However, the embodiments shown below are intended to limit the present invention to a liquid crystal display device. However, the present invention can be equally applied to various electro-optical display devices without departing from the technical idea shown in the claims. In each drawing used for the description in this specification, each layer and each member are displayed in different scales so that each layer and each member can be recognized on the drawing. However, it is not necessarily displayed in proportion to the actual dimensions.

[First Embodiment]
A liquid crystal display device according to a first embodiment of the present invention will be described with reference to FIGS. A liquid crystal display device 10A according to the first embodiment includes a transmissive liquid crystal display panel 11, a backlight unit 12 disposed on the back surface of the liquid crystal display panel 11, and the liquid crystal display panel 11 sandwiched between the backlight unit 12. It has an outer frame 13 for storage. As shown in FIGS. 2 and 5, the liquid crystal display panel 11 includes a liquid crystal layer 14, an array substrate 15 and a color filter substrate 16 sandwiching the liquid crystal layer 14, and a seal surrounding the periphery of the liquid crystal layer 14 in order to prevent liquid crystal from leaking. A material driver 17; a gate driver 18 for driving the liquid crystal display panel 11; a source driver 19; and a flexible printed circuit board 20 for receiving video signals from an external control board (not shown) and supplying power. Yes.

As shown in FIGS. 1 and 5, the backlight unit 12 has a configuration in which a bottom case 21, a reflection sheet 22, and an inner frame 23 are superimposed from the back side of the liquid crystal display device 10 </ b> A. An optical sheet member 25 including a light guide plate 24 and three optical sheets 26 to 28 is disposed in the central opening 23 a of the inner frame 23. The three optical sheets 26 to 28 are the first diffusion sheet 26 from the back side,
A prism sheet 27 and a second diffusion sheet 28 are provided. Then, the LED substrate 30 is fixed to the inner frame 23 with a double-sided tape 31 having excellent thermal conductivity so that the LEDs 29 are opposed to the side surface that becomes the light incident surface of the light guide plate 24.

The bottom case 21 is formed, for example, by pressing a stainless plate. A white reflective sheet 22 is placed in the bottom case 21. LED board 30 is FPC
A plurality of LEDs 29 that emit white light are disposed on the substrate. The side surface that becomes the light incident surface of the light guide plate 24 is processed to have unevenness to make the luminance of light incident from the LEDs 29 uniform, and the light is condensed in a desired direction on the upper surface that becomes the light exit surface. For this reason, an uneven surface treatment is applied. First
The second diffusion sheets 26 and 28 diffuse light so that the luminance is uniform, and the prism sheet 27 emits light directed in the Y-axis direction in FIG. 2 in the Z-axis direction (liquid crystal display panel 11 side) in FIG. It has a function to collect light. The extending portion 25a of the optical sheet member 25 composed of the three optical sheets 26 to 28 is fitted into the concave portion 23b of the inner frame 23, whereby the three optical sheets 26 to 2 are inserted.
The optical sheet member 25 consisting of 8 is positioned.

The inner frame 23 is a synthetic resin material and is formed by an injection molding method. As shown in FIG. 3B, the bottom case 21 and the inner frame 23 are mechanically coupled to each other by engaging the square hole 21 a on the side wall of the bottom case 21 and the protrusion 23 c on the side wall of the inner frame 23. As shown in FIG. 2, the inner frame 23 has a frame shape with a large opening 23a through which light passes. The outer frame 13 is formed by pressing a stainless plate. The outer frame 13 is fitted with the bottom case 21 and houses the liquid crystal display panel 11. The protrusion 21b on the side wall of the bottom case 21 and the square hole 13a on the side wall of the outer frame 13 are engaged, whereby the bottom case 21 and the outer frame 13 are mechanically coupled. As shown in FIG. 2, the outer frame 13 has a frame shape with a large opening 13b serving as a display window in the center.

With the above-described configuration, the light emitted from the LED 29 of the LED substrate 30 is diffused on the side surface of the light guide plate 24, reflected and diffused by the reflection sheet 22, and the luminance in a predetermined direction is increased by the light guide plate 24, thereby the first diffusion sheet. 26, diffused by the prism sheet 27 in the direction of the liquid crystal display panel 11, further diffused by the second diffusion sheet 28, and irradiated on the back surface of the liquid crystal display panel 11.

Next, the fitting gap and holding of the liquid crystal display panel 11 will be described. As described above, the liquid crystal display panel 11 needs many fitting gaps due to expansion / contraction due to temperature change. In the liquid crystal display device of the first embodiment, as shown in FIGS. 4A and 4B, in order to prevent the liquid crystal display panel 11 from floating and for positioning and holding with the opening 13 b of the outer frame 13,
The side surface 1 of the liquid crystal display panel 11 is attached to both ends of the liquid crystal display panel 11 in the longitudinal direction (X-axis direction in FIG. 2).
A total of four fixing tools 32A are provided to face 1a. In order to clearly show the position of the fixture 32A, the cross-sectional hatching is applied to the fixture 32A in the plan view of FIG. 3A.

The fixing tool 32A is formed of an elastic material that is deformed when pressed. For this reason, the fixture 32A also serves as a buffer material that absorbs the impact applied to the liquid crystal display device 10A. Fixture 3
In order to allow 2A to enter a narrow gap, the fixture 32A is preferably formed of a soft elastic material, for example, silicon rubber having a hardness of 10 degrees to 20 degrees is used.
As shown in FIG. 2, the fixture 32A is a rectangular parallelepiped. Therefore, the fixture 32A can be formed by simply cutting a silicon rubber plate or wire.

Moreover, as shown in FIGS. 4A and 4B, the dimension D2 of the gap portion into which the fixture 32A is inserted is larger than the thickness D1 of the fixture 32A. That is, D2-D1 at both ends of the liquid crystal display panel 11 becomes a fitting gap of the liquid crystal display panel. This fitting gap is, for example, 0.1
5 to 0.2 mm. Since there is a fitting gap between the liquid crystal display panel 11 and the fixture 33A as described above, there is no need to press-fit when the fixture 32A is inserted, so that the fixture 32A can be easily inserted into the gap. The height H1 of the fixture 32A is the same as the height H2 of the gap where the fixture 32A is inserted.

The reflective sheet 22 is formed with a notch 22a that avoids contact with the fixture 32A, and the inner frame 23 is formed with a notch 23d that avoids contact with the fixture 32A (see FIG. Therefore, the height H2 of the empty portion into which the fixing tool 32A is inserted is the height of the empty portion formed by the bottom case 21 and the outer frame 13. Note that the fixture 32 </ b> A may abut against the reflection sheet 22 without providing the notch 22 a in the reflection sheet 22.

The fixture 32A has a height that reaches the bottom case 21, but when the fixture 32A is inserted using a fixture that is large enough for the light guide plate 24 to reach the side surface of the bottom case 21. The light guide plate 24 may be arranged on the upper surface. By doing this,
It becomes possible to press and fix the light guide plate 24 from a direction perpendicular to the upper surface of the light guide plate 24.
Furthermore, a notch may be provided on the lower side of the fixture 32A so that the fixture 32A is arranged on the side surface and the upper surface of the light guide plate 24. In this way, the light guide plate 24 can also be fixed from two directions, a direction perpendicular to the upper surface of the light guide plate 24 and a direction perpendicular to the side surface of the light guide plate 24. At this time, considering the thermal expansion / contraction of the light guide plate 24, the fixture 32A
Is preferably made of a softer material than the light guide plate 24.

2 and 4A, the inclined surface 3 is formed on the edge of the outer frame 13 corresponding to the position of the fixture 32A.
There are a total of 4 locations for 3A. A notch 21c is formed on the side wall of the bottom case 21 to avoid contact with the inclined surface 33A. As shown in FIG. 4B, when the bottom case 21 and the outer frame 13 are coupled, the fixture 32A is moved by the inclined surface 33A in the horizontal direction in FIG. 4B (the direction parallel to the display surface of the liquid crystal display panel 11) and in FIG. Pressure is applied in the vertical direction (direction perpendicular to the display surface of the liquid crystal display panel 11). As a result, in the horizontal direction of FIG. 4B, the fixture 32A is deformed, and the fitting gap of the liquid crystal display panel is small or the fitting gap is eliminated. Further, in the vertical direction of FIG. 4B, the fixing tool 32A is deformed and the fixing tool 32A enters a slight gap between the liquid crystal display panel 11 and the outer frame 13, so that the fitting gap of the liquid crystal display panel is small. Alternatively, the fitting gap disappears and the outer frame 13 does not directly contact the display surface of the liquid crystal display panel 11.
As described above, the fixing tool 32 </ b> A is deformed, so that the liquid crystal display panel 11 is positioned and held as the outer frame 13 is attached.

The liquid crystal display device according to the first embodiment does not hold the liquid crystal display panel 11 with a double-sided tape as in Patent Document 1 described above. Therefore, in the liquid crystal display device 10A of the first embodiment,
It is suppressed that the stress in the thickness direction (Z direction in FIG. 2) is applied to the liquid crystal display panel 11 due to the deformation of the outer frame 13 and the inner frame 23, and the liquid crystal orientation is disturbed due to the deformation of the outer frame 13 and the inner frame 23. It is possible to reduce the occurrence of white display unevenness due to. Further, in the liquid crystal display device 10A of the first embodiment, since the double-sided tape is not used for fixing the liquid crystal display panel 11, the liquid crystal display panel 11 is mounted when the liquid crystal display panel 11 is incorporated as in the conventional example. When the liquid crystal display panel 11 is displaced or removed for repair, the parts are not damaged due to the double-sided tape.

Further, in the liquid crystal display device 10A according to the first embodiment, the deformation force in two directions perpendicular to the direction parallel to the display surface of the liquid crystal display panel is applied to the fixture 32A made of, for example, an elastic material, which can be deformed by the inclined surface 33A. Add Thereby, the fixture 32 is fitted in the fitting gap of the liquid crystal display panel 11.
The deformed portion A enters, and the liquid crystal display panel 11 is held with a force in two directions and positioned with a force in two directions. Further, since the fixing tool 32A is made of an elastic member, it can absorb expansion / contraction due to temperature change of each member such as an outer frame and change in dimensions due to external force. Further, when the outer frame 13 is attached to the bottom case 21, the fixture 32A is pressurized by the inclined surface 33A.
It is not necessary to add a special pressurizing operation for pressurizing the fixture 32A. Further, since the fixture 32A is made of an elastic member, it also serves as a buffer member that absorbs an impact on the liquid crystal display panel 11.

[Modification]
6A to 6D show first to fourth modifications of the liquid crystal display device 10A of the first embodiment, respectively. In the liquid crystal display device 10A of the first embodiment, the fixture 32A is the liquid crystal display panel 11.
Although an example in which a total of four in the short direction is used is shown, the present invention is not limited to this. That is, in the liquid crystal display device 10B according to the first modification shown in FIG. 6A, a total of two fixing tools 32B are provided one by one in the lateral direction of the liquid crystal display panel 11. Fixing tool 32B
Is extended over substantially the entire side surface of the liquid crystal display panel 11 in the short direction. As described above, since the number of the fixing tools 32B is small, the insertion time of the fixing tools 32B is shortened. In addition, since the fixing tool 32B is provided in a wide range, the reliability of holding the liquid crystal display panel 11 is high, but the fixing tool has a large width, which is expensive.

In addition, in the liquid crystal display device 10C according to the second modification shown in FIG. 6B, a total of two fixing tools 32C one by one in the short direction of the liquid crystal display panel 11 are short of the liquid crystal display panel 11 as in the first modification. Although it is provided in the approximate center of the side, the size of the fixture 32C is the same size as the fixture 32A of the first embodiment. The fixing tool 32C of the second modified example has a small width as compared with the fixing tool 32B of the first modified example, so that it is inexpensive, but looseness is likely to occur.

In addition, the liquid crystal display device 10D according to the third modification illustrated in FIG. 6C is provided with a total of six fixtures 32D, three in a short direction of the liquid crystal display panel 11. Fixing tool 32 of the first embodiment
Compared with four of A, since the number of fixtures 32D increases, the liquid crystal display panel 11 is more reliably held and has less play.

Furthermore, the liquid crystal display device 10E according to the fourth modification shown in FIG. 6D has a total of eight fixtures 3 in two in the lateral direction of the liquid crystal display panel 11 and two in the longitudinal direction of the liquid crystal display panel 11.
2E is provided. This makes it possible to hold and position the XYZ axes in FIG. 2 in all directions. Although not shown in these first to fourth modifications, the outer frame is provided with inclined surfaces having a length and a number corresponding to the respective fixtures 32B to 32E. As shown in the first embodiment, the first to fourth modifications, etc., the optimum method is selected and applied to various liquid crystal display devices in consideration of the material cost, working time, the effect of holding and positioning, and the like. be able to.

[Second Embodiment]
Next, a liquid crystal display device 10F according to a second embodiment will be described with reference to FIGS. 7A to 7C. However, in FIGS. 7A to 7C, the same reference numerals are given to portions having the same configuration as the liquid crystal display device 10 </ b> A of the first embodiment, and the suffix “F” is given to the reference symbols having the suffix. Instead, detailed description thereof is omitted. The liquid crystal display device 10F of the second embodiment is different from the liquid crystal display device 10A of the first embodiment in that the inner frame 23 is not provided and the fixture 32F also holds and positions the light guide plate. To do.

As shown in FIGS. 7A to 7C, the liquid crystal display device 10F according to the second embodiment does not have an inner frame and contacts the liquid crystal display panel 11 to prevent the liquid crystal display panel 11 from moving in the display surface direction. The thing is only the fixing tool 32F. As shown in FIGS. 7B and 7C, the fixture 32F holds and positions the light guide plate 24 by pressing the inclined surface 33F in the same manner as the liquid crystal display panel 11. Therefore, in the liquid crystal display device 10F of the second embodiment, the length of the inclined surface 33F formed on the outer frame 13 is increased until the position of the light guide plate 24 is reached.

In the liquid crystal display device according to the second embodiment, since the inclined surface 33F of the outer frame 13 can pressurize to the vicinity of the light guide plate 24 of the fixture 32F, the fixture 32F holds the liquid crystal display panel 11 and the light guide plate 24. And since it can position, the inner frame 23 can be reduced and a member to be used and a manufacturing man-hour can be reduced. Furthermore, since the fixing tool 32F is formed of an elastic member, it can cope with a change in the fitting gap between the light guide plate and another member due to contraction / expansion due to a temperature change.

In addition, although the outer frame 13 of the liquid crystal display device of the above-described first and second embodiments uses a sheet metal material made into a box shape by press working, it may be made into a box shape by bending. . In addition, although the inclined surfaces 33A and 33F have been shown as being formed on the ridges of the outer frame 13, they may be formed by cutting and raising from the side surfaces of the outer frame 13, or other members having inclined surfaces may be attached to the outer surfaces. It may be fixed to the frame 13. Moreover, you may form the outer frame 13 provided with inclined surface 33A, 33F by the die-casting method or the injection molding of a synthetic resin. Furthermore, when the inclined surface is formed on a ridge, even if the outer frame is made of sheet metal, even if it is made by a die casting method or an injection molding method of a synthetic resin material,
The deformation strength of the side wall of the outer frame is improved. If the inclined surface is a drawing process or a reinforcing rib, the deformation strength of the side wall of the outer frame is further improved.

In the first and second embodiments, the case of a liquid crystal display device using a liquid crystal display panel has been described as an example. However, the present invention is not limited to a liquid crystal display panel, but an organic EL display panel or an inorganic EL display.
The present invention can be similarly applied to various electro-optical display devices using a display panel, a plasma display panel, an LED display panel, a field emission display panel, or the like.

10A to 10F: Liquid crystal display device 11: Liquid crystal display panel 11a: Side surface of liquid crystal display panel 12: Backlight part 13: Outer frame 13a: Square hole of outer frame 13b: Opening of outer frame 1
4: Liquid crystal layer 15: Array substrate 16: Color filter substrate 17: Sealing material 18:
Gate driver 19: Source driver 20: Flexible printed circuit board 21
: Bottom case 21a: Square hole in the bottom case 21b: Projection in the bottom case 21c: Notch in the bottom case 22: Reflection sheet 22a: Notch in the reflection sheet 23: Inner frame 23a: Opening in the inner frame 23b: Recess in the inner frame 23c: Projection of inner frame 24: Light guide plate 25: Optical sheet 25
a: Extension part of optical sheet 26: First diffusion sheet 27: Prism sheet 28: Second diffusion sheet 29: LED 30: LED substrate 31: Double-sided tape 32A to 32F: Fixing tool 33A, 33F: Inclined surface of outer frame

Claims (7)

An electro-optical display device having an outer frame provided on the display surface side of the electro-optical display panel that is housed with the electro-optical display panel interposed therebetween, and a bottom case provided on the side opposite to the display surface side of the electro-optical display panel Because
A rectangular parallelepiped fixture that can be deformed by pressurization is disposed on the side surface of the electro-optic display panel,
The outer frame is provided with an inclined surface at a position in contact with the fixture,
The fixture is pressurized by the inclined surfaces of the outer frame in a state in contact with the display surface side and side surface side of the electro-optical display panel, the outer frame and the bottom case that is fixed to one another electrical optical display apparatus. The fixture electro-optical display device according to 請 Motomeko 1 that are arranged in at least one pair of opposing sides of the side surface of the electro-optical display panel. The fixture is extends partially into the surface of the electro-optical display panel, the outer frame is claimed in 請 Motomeko 1 that in contact through the fixture and the display surface of the electro-optical display panel Electro-optic display device. The outer frame is a box type having an opening in a central portion, the inclined surface is electro-optical display device according to 請 Motomeko 1 that is formed on the edge of the box type.   The electro-optical display device according to claim 1, wherein the fixture is made of an elastic material.   The electro-optical display panel is a liquid crystal display panel, a light guide plate is disposed between the bottom case and the liquid crystal display panel, and the liquid crystal display panel and the light guide plate are fixed by the fixture. Item 4. The electro-optical display device according to Item 1.   A method of manufacturing an electro-optic display device having an outer frame on the front side and a bottom case on the back side, which are housed with an electro-optic display panel interposed therebetween,
  Arranging the electro-optic display panel in the bottom case;
  Disposing at least a pair of rectangular parallelepiped-shaped fixtures deformable by pressing between the electro-optic display panel and the bottom case sidewall;
  A step of attaching the outer frame on which the inclined surface for pressing the fixing tool is formed to the outer surface of the bottom case so that the fixing tool is pressed to the display surface side and the side surface side of the electro-optic display panel. A method for manufacturing an electro-optic display device.

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