JP2008102299A - Fixing structure, liquid crystal display and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display, or the like, whose thickness is suppressed, and to provide a fixing structure between the liquid crystal display panel and the backlight unit. <P>SOLUTION: An open hole HL, that is a part of a sidewall 12 in a plastic chassis 11, is brought into contact with a plug terminal XP<SB>IN</SB>of a fixing piece XP, at the same time, a connection terminal XP<SB>CN</SB>of the fixing piece XP is brought into contact with a clamping surface 21a, that is a part of the liquid crystal display panel 51 so that the liquid crystal display panel 51 is fixed, and the liquid crystal display panel and the backlight unit are fixed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fixing structure for fixing a liquid crystal display panel and a backlight unit that emits backlight light to the liquid crystal display panel, a liquid crystal display device including the fixing structure, and an electronic device including the liquid crystal display device. It relates to equipment.

  In recent electronic devices (mobile electronic devices) excellent in portability, for example, small notebook personal computers and mobile phones, liquid crystal display devices as disclosed in Patent Documents 1 and 2 are provided. As can be seen from FIGS. 9 and 10 corresponding to Patent Documents 1 and 2, a flexible printed circuit (FPC 141) having excellent flexibility is mounted on the liquid crystal display device 159.

  Here, a simplified example of the relationship between the FPC 141, the liquid crystal display panel 151, and the backlight unit 152 is as shown in the cross-sectional view of FIG. 11A. As shown in this figure, the liquid crystal display panel 151 and the backlight unit 152 are connected via a double-sided adhesive tape BT ′, and the FPC 141 is connected to the liquid crystal display panel 151.

  However, as shown in FIG. 11A, due to the elasticity of the FPC 141, the FPC 141 itself spreads in the direction of the black arrow {springback (stress) occurs in the direction of the arrow}. For this reason, as shown in FIG. 11B, a divergence occurs between the liquid crystal display panel 151 and the backlight unit 152 (this phenomenon is referred to as panel floating).

  However, in the liquid crystal display device 159 of Patent Document 1 shown in FIG. 9, the liquid crystal display panel 151 and the light guide plate 132 of the backlight unit are fixed by being sandwiched between the upper bezel 161 and the intermediate bezel 162 and pressed by the lower bezel 163. Thus, the FPC 141 is in close contact with the intermediate bezel 162. Therefore, the FPC 141 is difficult to bend, and the liquid crystal display panel 151 connected to the FPC 141 is not separated from the backlight unit 152 due to the bend.

  Further, in the liquid crystal display device 159 of Patent Document 2 shown in FIG. 10, the liquid crystal display panel 151 is inserted into the insertion hole 164 of the backlight unit 152 having a box-like outer shape that is slightly larger than the liquid crystal display panel 151 itself. And is pressed by the rib 165 so as not to deviate from the backlight unit 152.

  However, in the liquid crystal display device 159 of Patent Document 1, three kinds of expensive metal bezels 161 to 163 made of metal are required, and in the liquid crystal display device 159 of Patent Document 2, the outer shape of the backlight unit 152 is relatively small. Become large. Therefore, the electronic device in which the liquid crystal display device 159 of Patent Document 1 is mounted increases in cost and further increases in size due to the mounting of a large number of bezels 161 to 163. Moreover, the electronic device in which the liquid crystal display device 159 of Patent Document 2 is mounted cannot achieve a sufficient size reduction.

  Therefore, an idea for reducing the number of bezels 161 to 163 and an idea for suppressing an increase in the size of the backlight unit 152 are listed as countermeasures. FIG. 12, FIG. 13A, FIG. 13B (FIG. 12 is an exploded perspective view, and FIG. 13A is a cross-sectional view taken along line A2-A2 ′ of FIG. 13B is a cross-sectional view taken along line B2-B2 'in FIG. 12 and FIGS. 14, 15A, and 15B (FIG. 14 is a perspective view, and FIG. 15A is a cross-sectional view taken along line A3-A3 ′ in FIG. FIG. 15B is a cross-sectional view taken along line B3-B3 ′ of FIG.

  A liquid crystal display device 159 shown in FIGS. 12, 13A, and 13B (referred to as a conventional liquid crystal display device 59) has an opening at a position where the liquid crystal display panel 151 to be moved can be pressed by bending of the FPC 141. A sheet of metal bezel 171 is provided. Therefore, even in the liquid crystal display device 159, the liquid crystal display panel 151 does not deviate from the backlight unit 152.

On the other hand, the liquid crystal display device 159 shown in FIGS. 14, 15A, and 15B (referred to as the conventional liquid crystal display device 59) suppresses the enlargement of the casing 111 of the backlight unit 152 and Ribs 172 are provided on the side wall 112. And this rib 172 is located so that the liquid crystal display panel 151 which is going to move by the bending of FPC141 can be pressed down. Therefore, in this liquid crystal display device 159, the liquid crystal display panel 151 does not deviate from the backlight unit 152.
JP 2005-115335 A JP 09-127490 A

  However, in the conventional liquid crystal display device 159, the bezel 171 is positioned so as to cover the liquid crystal display panel 151. For this reason, the thickness of the liquid crystal display device 159 increases due to the thickness of the bezel 171. Further, a bezel 171 that protrudes in a direction perpendicular to the thickness direction q (lateral direction qq) is also generated, and the liquid crystal display device 159 is enlarged as a whole (see FIGS. 13A and 13B).

  Further, in the conventional liquid crystal display device 159, the bezel is not present but the rib 172 is present. If the rib 172 is used to reliably prevent fluctuations in the liquid crystal display panel 151, the rib 172 needs to have a certain strength, and accordingly, the rib 172 tends to be thick. Then, the thickness of the liquid crystal display device 159 is also increased as in the conventional liquid crystal display device 159.

  The present invention has been made to solve the above problems. The purpose is to provide a liquid crystal display device with a reduced thickness, to provide a fixing structure between a liquid crystal display panel and a backlight unit for realizing the liquid crystal display device, and to mount the liquid crystal display device. To provide electronic equipment.

  In the present invention, when the liquid crystal display panel is positioned over the backlight unit housed in the housing, one end of the fixing piece connected to a part of the liquid crystal display panel is in contact with a part of the side wall of the housing. By doing so, the liquid crystal display panel is fixed, and the backlight unit and the liquid crystal display panel are fixed.

  In such a fixing structure, the fixing piece is a piece connected to a part of the liquid crystal display panel. Therefore, the fixed piece has a small size enough to be connected to a part of the liquid crystal display panel. Further, the fixed piece is a member separate from the casing, and there is no dependency on the size of the fixed piece and the size (for example, thickness) of the casing. Therefore, even if such a fixing piece is used, the liquid crystal display device cannot be increased in size.

  In this fixing structure, it is desirable that the connection between the liquid crystal display panel and the fixing piece is by adhesion, and the contact between one end of the fixing piece and a part of the side wall of the body is by engagement. .

  Further, when the direction in which the liquid crystal display panel deviates from the backlight unit is set as the deviating direction, a part of the side wall of the housing includes a locking surface that can come into contact with the fixed piece that is to move in the deviating direction. Desirable. As an example, there may be mentioned a case where an opening having such a locking surface as an inner wall surface is a part of the side wall of the housing.

  In this case, when the liquid crystal display panel connected to the FPC is separated from the backlight unit by, for example, spring back of the FPC, the fixed piece connected to the liquid crystal display panel is one of the side walls of the housing. It catches on the inner wall surface (locking surface) of the hole provided in the part, for example, the side wall. For this reason, the liquid crystal display panel is reliably fixed with respect to the backlight unit.

  By the way, the opening is not particularly limited as long as it includes the locking surface. However, it is desirable that the locking surface most distant from the bottom surface of the housing has an inclined portion, and the inclined portion is inclined so as to widen the entrance of the opening. This is because the fixed piece can be easily inserted into the opening.

  One end of the fixed piece has a first surface in surface contact with a part of the side wall, and the other end of the fixed piece connected to a part of the liquid crystal display panel is a surface with respect to a part of the liquid crystal display panel. For example, it is desirable that the area of the second surface of the fixed piece is larger than the area of the first surface.

  In this case, the opening or the like which is a part of the side wall comes into surface contact with the fixed piece, and the fixed piece and the liquid crystal display panel also come into surface contact. Therefore, for example, such a fixing structure includes a backlight unit and a liquid crystal display panel as compared with a fixing structure in which a part of the side wall and the fixing piece are in line contact and the fixing piece and the liquid crystal display panel are in line contact. Can be firmly fixed.

  Further, it is desirable that a plurality of part of the liquid crystal display panel connected to the fixed piece exist, and it is further desirable that a part of the plurality of liquid crystal display panels exist at least at two corners of the liquid crystal display panel. This is because the variation of the liquid crystal display panel can be efficiently suppressed with the fixed piece.

  Needless to say, the liquid crystal display device having the above-described fixing structure and the electronic apparatus having the liquid crystal display device are also the present invention.

  According to the present invention, the liquid crystal display panel and the backlight unit can be fixed by a separate member that is a relatively small size and is not related to the housing. For this reason, the liquid crystal display device is thinned, and further, an electronic device on which the liquid crystal display device is mounted is also thinned.

[Embodiment 1]
An embodiment of the present invention will be described below with reference to the drawings. Note that, depending on the drawing, the member number and hatching may be omitted for convenience, but in such a case, other drawings are referred to. Moreover, the black circle on the drawing means a direction perpendicular to the paper surface.

[1. Cell phone and liquid crystal display device mounted on it]
As an electronic device excellent in portability, for example, there is a mobile phone 69 as shown in FIG. FIG. 1 shows a detailed view of the liquid crystal display device 59 included in such a mobile phone 69. 1A, FIG. 2B, and FIG. 2C are sectional views taken along lines AA ′, BB ′, and CC ′.

  As shown in FIGS. 1, 2A, and 2B, the liquid crystal display device 59 includes a liquid crystal display panel 51 and a backlight unit 52 so as to overlap each other. However, a part of the liquid crystal display panel 51 and a part of the backlight unit 52 are bonded by a double-sided tape BT. A direction in which the liquid crystal display panel 51 and the backlight unit 52 overlap is referred to as an overlapping direction P.

  In the liquid crystal display panel 51, an active matrix substrate (AM substrate) 21 and a counter substrate 22 facing the AM substrate 21 are bonded together with a sealing material (not shown), and liquid crystal (not shown) is injected into the gap between them. ing. The liquid crystal display panel 51 also includes a switching element such as a TFT (Thin Film Transistor) that controls the liquid crystal, a pixel electrode (transparent electrode), an alignment film, a color filter, and the like. Yes.

  The liquid crystal display panel 51 includes optical sheets 24 and 25 (for example, a polarizing sheet and a retardation sheet) that sandwich the AM substrate 21 and the counter substrate 22. The liquid crystal display panel 51 functions as a display panel by receiving light from the backlight unit 52 (backlight light).

  On the other hand, the backlight unit 52 includes an LED (Light Emitting Diode) 31, a light guide plate 32, a reflection sheet 33, and a diffusion sheet 34.

  The LED 31 emits light, and a part of the light is directly incident on the outer peripheral end of the light guide plate 32. And the light-guide plate 32 converts the light from LED31 into planar light. The reflection sheet 33 reflects the light from the LED 31 and the light propagating through the light guide plate 32 toward the liquid crystal display panel 51 without leaking, and the diffusion sheet 34 diffuses the light from the light guide plate 32. In this way, light is spread over the entire area of the liquid crystal display panel 51.

  The light source such as the LED 31 is provided on a flexible printed circuit 41 (Flexible Printed Circuit; FPC 41) having excellent flexibility. In addition, a driver IC (not shown) that controls driving of the liquid crystal display panel 51 is mounted on the FPC 41. For this purpose, the FPC 41 is electrically connected to the liquid crystal display panel 51 (more specifically, the AM substrate 21).

  However, the portion of the liquid crystal display panel 51 to which the FPC 41 is connected is the AM substrate 21 on the side close to the backlight unit 52 among the AM substrate 21 and the counter substrate 22. As shown in FIG. 2A, the AM substrate 21 has a larger area than the counter substrate 22, and a part of the AM substrate 21 that does not overlap the substrates 21 and 22 (however, faces the counter substrate 22. The FPC 41 is connected to the clamping surface 21a).

  Further, the mounting surface of the LED 31 in the FPC 41 and the surface connected to the AM substrate 21 are the same surface, and the LED 31 and the AM substrate 21 are separated from each other in the overlapping direction P. Therefore, the FPC 41 is curved (see FIG. 2A).

  By the way, the liquid crystal display device 59 uses a fixed piece XP to bond a liquid crystal in addition to bonding a part of the non-clamping surface 21b of the AM substrate 21 and a part of the light emitting surface of the light guide plate 32 with the double-sided tape BT. The display panel 51 and the backlight unit 52 are fixed. Therefore, a fixing structure between the liquid crystal display panel 51 and the backlight unit 52 using the fixing piece XP will be described in detail below.

[2. About fixed structure]
As shown in FIG. 2B, the plastic chassis (housing) 11 that houses the backlight unit 52 has side walls 12 that rise along the overlapping direction P. Further, as shown in FIGS. 1, 2B, and 2C, an opening HL into which the fixing piece XP can be inserted is formed in the side wall 12.

  Furthermore, the inner wall surface 13 (first inner wall surface 13a) of the opening HL that faces the bottom surface of the plastic chassis 11 and is most distant is higher than the sandwiching surface 21a of the AM substrate 21 in the overlapping direction P. In addition, the inner wall surface 13 (second inner wall surface 13b) of the closest opening HL facing the bottom surface of the plastic chassis 11 is lower than the sandwiching surface 21a of the AM substrate 21 in the overlapping direction P. Then, in the overlapping direction P, a gap GA is generated between the first inner wall surface 13a and the clamping surface 21a.

Therefore, the fixed piece XP is inserted into the opening HL through the gap GA. However, not all of the fixed piece XP is buried in the opening HL, and only a part of the fixed piece XP (referred to as an insertion end XP _IN ) is inserted into the opening HL. In addition, since the thickness of the insertion end XP _IN is about the same as the gap GA, the first inner wall surface 13a of the opening HL and the insertion end XP _IN are engaged with each other. That is, the opening HL which is a part of the side wall 12 and the insertion end XP _IN which is one end of the fixed piece XP are brought into contact with each other by being engaged with each other.

On the other hand, the portion other than the insertion end XP _IN (referred to as a connection end XP _CN ) in the fixed piece XP has an area that can contact the sandwiching surface 21a of the AM substrate 21. Moreover, portions in contact with the clamping face 21a in the coupling end XP _CN has an adhesive property. Therefore, lead by bonding to the connecting end XP _CN and clamping surface 21a. That is, the holding surface 21a that is part of the fixed piece XP of which is the other end connecting end XP _CN and the liquid crystal display panel 51 comes into contact by bonding.

In this manner, the can opening HL is part of the side wall 12 contacts the insertion end XP _IN of the fixing piece XP in plastics chassis 11, a portion connecting end XP _CN of the fixing piece XP is a liquid crystal display panel 51 The liquid crystal display panel 51 is stationary when it comes into contact with the sandwiching surface 21a.

  This is because, even if the liquid crystal display panel 51 is about to be separated from the backlight unit 52 due to the spring back of the FPC 41, the fixing piece XP connected to the holding surface 21a of the liquid crystal display panel 51 comes into contact with the opening HL. This is to suppress the movement of the liquid crystal display 51 (note that the direction in which the liquid crystal display panel 51 is about to be separated from the backlight unit 52 is referred to as a deviation direction).

  Therefore, the liquid crystal display device 59 fixes the liquid crystal display panel 51 and the backlight unit 52 by the adhesive force of the double-sided tape BT, and the contact force (engagement force) between the fixing piece XP connected to the liquid crystal display panel 51 and the plastic chassis 11. ) Also fixes the liquid crystal display panel 51 and the backlight unit 52. As described above, when two forces (adhesive force / engagement force) are used, the liquid crystal display panel 51 and the backlight unit 52 are firmly fixed.

  In addition, with this fixing structure, the liquid crystal display panel 51 and the backlight unit 52 are fixed without using a large member such as a metal bezel, so the liquid crystal display device 59 is unlikely to be thick. Further, in this fixing structure, since the plastic chassis 11 is not provided with ribs or the like, the plastic chassis 11 does not increase in size, and the thickness of the liquid crystal display device 59 is unlikely to increase.

[2-1. About opening]
Here, the opening HL will be described in detail. The opening HL is provided in a part of the side wall 12 in the plastic chassis 11. And as shown to FIG. 2B and FIG. 2C, the opening HL has the five inner wall surfaces 13 (13a-13e).

  Specifically, the first inner wall surface 13 a is the surface that is most dissociated while facing the bottom surface of the plastic chassis 11, and the second inner wall surface 13 b is the closest surface that faces the bottom surface of the plastic chassis 11. The third inner wall surface 13c and the fourth inner wall surface 13d are surfaces positioned so as to sandwich the first inner wall surface 13a and the second inner wall surface 13b, and the fifth inner wall surface 13e is formed from the first to fourth inner walls. It is a surface which contacts the wall surfaces 13a to 13d and becomes the bottom of the opening HL.

  As described above, the opening HL has the five inner wall surfaces 13a to 13e, but is not limited thereto. The point is that the opening HL may include a surface (locking surface) that engages with the fixed piece XP that moves along with the liquid crystal display panel 51 that is about to move in the divergence direction.

  If this is the case, the movement of the liquid crystal display panel 51 in the separation direction can be suppressed by the fixed piece XP not moving. Therefore, not only the opening HL including such a locking surface but also a groove including the locking surface may be used.

  As shown in FIG. 2B, the first inner wall surface 13a has an inclined portion 14, and the inclined portion 14 is preferably inclined so as to widen the inlet of the opening HL. That is, it is preferable that a part (inclined portion 14) of the first inner wall surface 13a is inclined so that the inner shape of the opening HL becomes tapered as it goes deeper into the opening HL.

In this case, as shown in FIG. 3A, even after the liquid crystal display panel 51 and the backlight unit 52 are bonded by the double-sided tape BT (the liquid crystal display panel 51 and the backlight unit after bonding). 52 is also referred to as a module), and the insertion end XP _IN can enter along the inclined portion 14.

Moreover, as shown in FIG. 3B, it enters to insertion end XP _IN strikes the fifth inner wall surface 13e of the opening HL, then toward the first inner wall surface 13a so as to follow the fifth inner wall surface 13e When, with one surface of the bayonet end XP _iN (the surface of the fixing piece XP) is opposed to the first inner wall surface 13a, clamping one side of the connecting end XP _CN is the back surface of one surface (back surface of the fixing piece XP) is AM substrate 21 It contacts the surface 21a (see FIG. 3C). And the fixing piece XP and the liquid crystal display panel 51 are integrated by the adhesiveness which the back surface (adhesion surface) of this fixing piece XP has.

  Thus, if the entrance of the opening HL is widened, it becomes easy to insert the fixing piece XP into the opening HL. However, even if the inclined portion 14 that widens the entrance of the opening HL is not provided, as long as the gap GA is long enough to allow the insertion of the fixed piece XP, as shown in FIGS. The same insertion as in FIG. 3C can be performed.

  Further, as shown in FIG. 5A, the clamping surface 21a and the fixed piece XP are opposed to each other, and further along the clamping surface 21a, the fixed piece XP gradually slides toward the opening HL and opens. It may be inserted into the hole HL (see FIGS. 5B and 5C). However, it is necessary to prevent the bonding surface 2 of the fixing piece XP and the clamping surface 21a from being bonded during insertion into the opening HL.

  In FIGS. 5A to 5C showing the slide insertion of the fixed piece XP, the plastic chassis 11 having the opening HL without the inclined portion is taken as an example. However, even if the opening having the inclined portion 14 is the plastic chassis 11 provided with HL, the fixed piece XP can be slid.

[2-2. About fixed piece]
Next, the fixed piece XP will be described in detail. As shown in the plan view of FIG. 6 (plan view of the broken line portion in FIG. 1), the fixed piece XP is connected to the insertion end XP _IN inserted into the opening HL and the connection end XP connected to the holding surface 21 a of the liquid crystal display panel 51. Includes _CN . It is desirable that both the insertion end XP _IN and the connection end XP _IN have a planar shape (note that the insertion end XP _IN is referred to as a first surface and the connection end XP _CN is referred to as a second surface).

With this design, the opening HL (detail to the first inner wall surface 13a) in contact with the insertion end XP _IN, and because both contact becomes surface contact of the contact with the clamping surface 21a and the coupling end XP _CN It is. In other words, it tends to widen the contact area towards the surface contact as compared to the line contact, due to the area increase, coupling force between the connecting end XP _CN and engaging force and clamping surface 21a of the hole HL and insertion end XP _IN It is because (adhesive force etc.) increases.

Incidentally, when the weakened the connection between the connecting end XP _CN and clamping surfaces 21a, fixing the backlight unit 52 and the liquid crystal display panel 51 will depend only on the adhesion of double-sided tape BT. Then, may the connection between the connecting end XP _CN and clamping surface 21a is as much as possible strong. Therefore, the area of the connecting end XP _CN in fixing piece XP (area of the second surface), the broader than the area of the insertion end XPIN (area of the first surface) desired.

Accordingly, as the shape of the fixed piece XP, in addition to the T-shape as shown in FIG. 6 where the insertion end XP _IN is a T-shaped vertical line and the connection end XP _CN is a T-shaped horizontal line, the insertion end XP _IN is A Y-shaped vertical line or a Y-shaped diagonal line with the connecting end _XPCN as the Y-shaped diagonal line may be used. The shape of the fixing piece XP may be fan-shaped or fan-shaped for the insertion end XP _IN and roots.

Further, insertion end XP _IN in the fixed piece XP, to be inserted into the opening HL, may have a shorter width W2 than the width W1 of the opening HL (see FIG. 2C). However, due to an impact applied to the liquid crystal display device 59 or the like, the liquid crystal display panel 51 deviates along a direction intersecting the overlapping direction P (crossing direction; for example, the longitudinal direction L and the short direction S of the liquid crystal display panel 51). Things can happen. If you try to prevent such happening, as shown in FIG. 7, the width W2 of the insertion end XP _IN, it is sufficient as the width W1 of the opening HL match (width W1 = width W2 ).

  In this case, for example, even if the liquid crystal display panel 51 tries to move along the short direction S, the fixed piece XP connected to the liquid crystal display panel 51 is connected to the third inner wall surface 13c / fourth of the opening HL. This is because the liquid crystal display panel 51 cannot move because it hits the inner wall surface 13d.

Further, as shown in FIG. 6, if as the fifth inner wall surface 13e of the tip and opening HL of the insertion end XP _IN contacts, for example, along the longitudinal direction L, the liquid crystal display panel 51 is about to move However, since the fixing piece XP connected to the liquid crystal display panel 51 hits the fifth inner wall surface 13e of the opening HL, the liquid crystal display panel 51 cannot move.

  However, the fixed piece XP and the inner wall surfaces 13a to 13e of the opening HL may not always be in contact with each other. For example, when the liquid crystal display device 59 is not subjected to an impact or the like, the fixed piece XP and the inner wall surfaces 13a to 13e of the opening HL need not be in contact with each other. In short, when the liquid crystal display panel 51 moves excessively, the fixed piece XP and the inner wall surfaces 13a to 13e only need to come into contact with each other.

  The material of the fixed piece XP is not particularly limited. For example, a relatively flexible material such as polyethylene terephthalate (PET) may be used. Such a fixed piece XP made of PET is inserted into the opening HL while being curved or the like in order to have flexibility. Therefore, even after the module composed of the liquid crystal display panel 51 and the backlight unit 52 is completed, the fixing piece XP can be easily inserted into the opening HL.

  In addition, when a flexible PET fixed piece (PET tape) XP is mounted on the liquid crystal display device 59, it can be said that the liquid crystal display device 59 is strong in shock absorption. This is because the fixed piece XP absorbs the impact applied to the liquid crystal display device 59 and does not transmit the impact to other members (the liquid crystal display panel 51, the backlight unit 52, etc.).

[Other embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, the contact between the fixed piece XP and the sandwiching surface 21a of the AM substrate 21 has been described as being due to adhesion, but is not limited thereto. In short, it is sufficient that the fixed piece XP and the AM substrate 21 are brought into contact with each other. For example, the fixed piece XP is fitted into a groove provided in the holding surface 21a of the AM substrate 21 so that the fixed piece XP and the AM substrate 21 are connected. The substrate 21 may be connected.

  Moreover, although LED31 is mounted in FPC41, it is not limited to this. For example, the LED 41 may be mounted on a dedicated mounting board, and the mounting board and the FPC 41 may be connected.

  In FIG. 1, there are two openings HL into which the fixing piece XP is inserted, but the present invention is not limited to this. That is, the number of apertures HL may be one or three or more. However, as shown in FIG. 1, openings HL and HL are provided corresponding to both corners on one short side of the liquid crystal display panel 51, and the fixing pieces XP and HL inserted into the openings HL and HL are provided. If XP and the two corners are bonded, the two longitudinal lengths of the liquid crystal display panel 51 corresponding to the two corners are fixed in a balanced manner.

  Therefore, when it is intended to efficiently suppress the fluctuation of the liquid crystal display panel 51 with the fixed piece XP, a part of the liquid crystal display panel 51 in contact with the fixed piece XP inserted into the plurality of openings HL is a liquid crystal display panel. The number of the corners of the liquid crystal display panel 51 may be at least two (of course, may be all corners or two corners sandwiching the center of the liquid crystal display panel 51).

  Further, in the liquid crystal display device 59 that accommodates the liquid crystal display panel 51, for example, when the backlight unit 52 and the liquid crystal display panel 51 are fixed only by the double-sided tape BT, the plastic chassis 11 and the liquid crystal display panel are provided. If it cannot come into contact with 51 at all, it can be said that the fixed piece XP is effectively utilized.

  This is because the fixed piece XP is a member for guiding the state where the plastic chassis 11 and the liquid crystal display panel 51 are not in contact to the contact state. In addition, the plastic chassis 11 and the liquid crystal display panel 51 are in contact with each other by a small member such as a fixed piece XP, and both the backlight unit 52 and the liquid crystal display panel 51 accommodated in the plastic chassis 11 are connected. It can be said that the liquid crystal display device 59 remains small because it is fixed.

These are the perspective views of the liquid crystal display device mounted in a mobile telephone. (A) is a cross-sectional view taken along the line AA ′ in FIG. 1, (B) is a cross-sectional view taken along the line BB ′ in FIG. 1, and (C) is a cross-sectional view taken along the line CC ′ in FIG. FIG. These are sectional drawings of the same direction as Drawing 2B, and are sectional views showing signs that a fixed piece is inserted in order of (A) to (C). Then, (A)-(C) are sectional drawings which show another example of FIG. 3A-FIG. 3C. Then, (A)-(C) are sectional drawings which show another example of FIG. 3A-FIG. 3C and FIG. 4A-FIG. 4C. FIG. 2 is an enlarged plan view of a broken line region in FIG. 1. FIG. 2C is a cross-sectional view showing another example of FIG. 2C. FIG. 3 is a perspective view of a mobile phone. FIG. 6 is an exploded perspective view of a conventional liquid crystal display device. FIG. 10 is an exploded perspective view of a conventional liquid crystal display device different from FIG. 9. (A) is a schematic cross-sectional view of a conventional liquid crystal display device, and (B) is a cross-sectional view showing a state where an FPC springback occurs. FIG. 5 is an exploded perspective view of a conventional liquid crystal display device on which a metal bezel is mounted. (A) is a cross-sectional view taken along line A2-A2 'of FIG. 12, and (B) is a cross-sectional view taken along line B2-B2' of FIG. These are the perspective views of the conventional liquid crystal display device which provided the rib in the housing | casing. (A) is a cross-sectional view taken along line A3-A3 'in FIG. 14, and (B) is a cross-sectional view taken along line B3-B3' in FIG.

Explanation of symbols

XP fixed piece XP _IN insertion end (one end of fixed piece)
XP _CN connecting end (the other end of the fixed piece)
11 Plastic chassis (housing)
12 Side wall of the plastic chassis (side wall of the housing)
HL opening (part of the side wall)
13 Inner wall surface (locking surface)
14 Inclined part 21 Active matrix substrate (part of liquid crystal display panel)
21a Holding surface (part of the liquid crystal display panel)
22 Counter substrate 31 LED
32 Light guide plate 41 FPC
BT Double-sided tape 51 Liquid crystal display panel 52 Backlight unit 59 Liquid crystal display device 69 Mobile phone (electronic equipment)

Claims (11)

When the liquid crystal display panel is positioned over the backlight unit housed in the housing,
A fixed structure where the backlight unit and the liquid crystal display panel are fixed when one end of the fixed piece connected to a part of the liquid crystal display panel comes into contact with a part of the side wall of the housing, thereby fixing the liquid crystal display panel. . The connection between the liquid crystal display panel and the fixed piece is due to adhesion,
The fixing structure according to claim 1, wherein the contact between one end of the fixing piece and a part of the side wall of the housing is due to engagement. When the direction in which the liquid crystal display panel deviates from the backlight unit is the deviating direction,
3. The fixing structure according to claim 1, wherein a part of the side wall of the housing includes a locking surface that can come into contact with the fixing piece that is to move in the divergence direction.   The fixing structure according to claim 3, wherein a part of the side wall of the housing is an opening having the locking surface as an inner wall surface. The locking surface that is most distant from the bottom surface of the housing has an inclined portion,
The fixing structure according to claim 3 or 4, wherein the inclined portion is inclined so as to widen an entrance of the opening. One end of the fixed piece has a first surface in surface contact with a part of the side wall,
The other end of the fixed piece connected to a part of the liquid crystal display panel has a second surface in surface contact with a part of the liquid crystal display panel. Fixed structure.   The fixing structure according to claim 6, wherein an area of the second surface of the fixing piece is larger than an area of the first surface.   The fixing structure according to claim 1, wherein there are a plurality of liquid crystal display panels connected to the fixing piece.   The fixing structure according to claim 8, wherein a part of the plurality of liquid crystal display panels is at least two in a corner portion of the liquid crystal display panel.   A liquid crystal display device having the fixing structure according to claim 1.   An electronic apparatus comprising the liquid crystal display device according to claim 10.

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