JP4327110B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device in which at least a rear chassis, a lamp holder attached with a backlight, a diffusion plate, a panel holder, a liquid crystal panel, and a panel fixing bracket are incorporated in this order with respect to the thickness direction. The present invention relates to a mounting structure for these members.

  Conventionally, in the liquid crystal display device 100 disclosed in Patent Document 1, as shown in FIGS. 7A and 7B, a rear chassis 101, a backlight 102 such as a fluorescent tube, and a first support base in the thickness direction. 103, the second support base 104, the diffusion plate 105, the intermediate frame 106, the liquid crystal panel 107, and the panel housing frame 108 are assembled in order.

  In this liquid crystal display device 100, in order to position the intermediate frame 106 for housing the peripheral portion of the liquid crystal panel 107, it is perpendicular to the thickness direction of the liquid crystal display device 100 with respect to the second support base 104. By fitting the screw 109 into the rear chassis hole 101a and the intermediate frame hole 106a, the diffusion plate 105 is held between the second support base 104 and the intermediate frame 106 is fixed.

The intermediate frame 106 is a long body shown in FIG. 8, and in order to fix the four sides of the liquid crystal panel 107 having a square screen by the intermediate frame 106 formed of the long body, at least It is necessary to prepare two intermediate frames 106 and hold the liquid crystal panel 107.
JP 2004-29662 A (published January 29, 2004)

  However, in the above conventional liquid crystal display device, in order to position the intermediate frame 106, the screw 109 is fitted to the second support base 104 from the direction perpendicular to the thickness direction. For this reason, since it is necessary to prepare at least two intermediate frames 106 and hold the liquid crystal panel 107, there is a problem that the number of parts increases.

  The intermediate frame 106 has a shape that is disposed only on one edge of the screen, and does not have a shape that accommodates the entire periphery of the liquid crystal panel 107. As a result, when the liquid crystal display device 100 is manufactured while standing, the liquid crystal panel 107 cannot be supported on the lower side of the screen. Therefore, there is a problem that the liquid crystal panel 107 cannot be reliably positioned in the vertical direction.

  It is also conceivable to use a plastic material such as polycarbonate for the intermediate frame 106 in order to reduce the weight. In this case, if thermal expansion with the mating member is not taken into consideration, stress is generated in the intermediate frame 106 due to the difference in thermal expansion with the mating counterpart, and the liquid crystal display device 100 is driven. As the temperature of peripheral members such as fluorescent tubes rises, the intermediate frame 106 is easily deformed. In particular, the influence is large in the large-sized liquid crystal display device 100. As a result, it becomes difficult to support the liquid crystal panel 107 and the diffusion plate 105.

  Furthermore, the screw 109 fitted into the rear chassis hole 101a and the intermediate frame hole 106a is fitted from the direction perpendicular to the thickness direction of the liquid crystal display device 100 (that is, the direction of the side of the thin display device). When removing the intermediate frame 106, the labor of disassembling that the operator is positioned on the left and right of the liquid crystal display device 100 and removes the screw 109 is also regarded as a problem.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a liquid crystal that can be easily integrated and can easily position each member when assembled in an upright state. It is to provide a display device.

  In order to solve the above problems, the liquid crystal display device of the present invention includes at least a rear chassis, a lamp holder attached with a backlight, a diffusion plate, a panel holder, a liquid crystal panel, and a panel fixing bracket in this order in the thickness direction. In the liquid crystal display device, the liquid crystal panel is sandwiched between a panel fixture and a panel holder, and the diffusion plate and the lamp holder are sandwiched between the panel holder and a rear chassis, and the lamp The holder and the rear chassis are each provided with a first fitting portion comprising a concavo-convex portion that is fitted between the lamp holder and the rear chassis, and the lamp holder and the panel holder include the lamp holder and the panel. A second fitting portion comprising a concavo-convex portion to be fitted to each other between the holder and the panel holder and the panel; Le fixing bracket, and wherein a third fitting portion consisting of concave-convex portion to be fitted to each other between the panel fixing bracket and the panel holder are provided.

  According to the above invention, the liquid crystal panel is sandwiched between the panel fixing bracket and the panel holder, and the diffusion plate and the lamp holder are sandwiched between the panel holder and the rear chassis. Therefore, since each member is only laminated, each member can be easily integrated.

  Further, when assembling, the lamp holder and the rear chassis are each provided with a first fitting portion that is an uneven portion that is fitted between the lamp holder and the rear chassis. What is necessary is just to insert the convex-concave corresponding to the 1st fitting part formed in the lamp holder in any one of the uneven | corrugated | grooved part of the made 1st fitting part.

  Further, since the lamp holder and the panel holder are each provided with a second fitting portion composed of a concavo-convex portion that is fitted between the lamp holder and the panel holder, the lamp assembled to the rear chassis. What is necessary is just to insert the convex-concave corresponding to the 2nd fitting part formed in the panel holder in any one of the uneven | corrugated | grooved part of the 2nd fitting part formed in the holder.

  Further, since the panel holder and the panel fixing bracket are respectively provided with third fitting portions made of concavo-convex portions that are fitted to each other between the panel fixing bracket and the panel holder, the rear chassis and the lamp holder are provided. The corresponding concave-convex portion of the third fitting portion formed on the panel fixing bracket may be inserted into one of the concave-convex portions of the third fitting portion formed in the panel holder in which is integrated.

  Thus, since each member is assembled by the 1st fitting part-the 3rd fitting part which consist of a concavo-convex part, it is easy to position each member just by inserting a convex part into a concave part or a concave part into a convex part. It can be carried out. Therefore, in the case of assembling in an upright state, it is possible to provide a liquid crystal display device that can be easily integrated and each member can be easily positioned.

  In the liquid crystal display device of the present invention, a chassis standing wall is erected at the edge of the rear chassis, and a lamp holder frame for supporting a backlight is provided at the end of the lamp holder. The side wall of the lamp holder mount is preferably formed so as to be fitted into the chassis standing wall.

  As a result, when the lamp holder and the rear chassis are fitted in the first fitting portion, the side wall of the lamp holder mount is simply placed along the chassis standing wall, and the fitting in the first fitting portion is performed. Will be guided to achieve. Therefore, the fitting at the first fitting portion is further facilitated.

  In the liquid crystal display device of the present invention, a chassis standing wall is provided at the edge of the rear chassis, and a panel holder hanging portion is provided at the edge of the panel holder. It is preferable that the panel holder hanging portion is formed so as to be fitted onto the chassis standing wall.

  In the liquid crystal display device of the present invention, a panel holder hanging portion is provided at an edge of the panel holder, and the panel holder hanging portion of the panel holder is fitted on the chassis standing wall. It is preferable to be formed.

  Accordingly, when the panel holder and the lamp holder are fitted in the second fitting portion, the fitting at the second fitting portion can be achieved only by placing the panel holder hanging portion along the chassis standing wall. To be guided. Therefore, the fitting at the second fitting portion is further facilitated.

  In the liquid crystal display device of the present invention, the panel holder hanging portion of the panel holder is provided with a locking claw having elasticity, and the chassis standing wall of the rear chassis is provided with the panel holder of the panel holder. It is preferable that a locking portion for locking the locking claw is formed so that the panel holder hanging part does not come off the chassis standing wall when the hanging part is fitted into the chassis standing wall. .

  Thereby, when the panel holder hanging part of the panel holder is fitted into the chassis standing wall, the locking part locks the locking claw so that the panel holder hanging part does not come off from the chassis standing wall. . Therefore, the panel holder can be temporarily fixed to the rear chassis by the locking claw and the locking portion without using, for example, screws.

  In the liquid crystal display device of the present invention, the panel holder is formed with a panel holder base that rises in a convex shape, and the panel fixing bracket has a fixing bracket step that is fitted to the panel holder base. It is preferable that the part is formed.

  As a result, when the panel fixing bracket and the lamp holder are fitted in the third fitting portion, the fixing bracket stepped portion is simply placed along the panel holder base portion that rises in a convex shape. It is guided so that the fitting of can be achieved. Therefore, the fitting at the third fitting portion is further facilitated.

  In the liquid crystal display device of the present invention, the lamp holder is provided with a diffusion plate mounting portion for mounting the diffusion plate, and when the diffusion plate is mounted on the diffusion plate mounting portion, It is preferable that a diffusion plate fitting portion for fitting the diffusion plate is provided.

  Accordingly, the diffusion plate can be guided to the diffusion plate mounting portion only by inserting the diffusion plate along the diffusion plate fitting portion, and the diffusion plate can be easily mounted on the diffusion plate mounting portion.

  In the liquid crystal display device of the present invention, the panel holder is provided with a panel mounting portion for mounting the liquid crystal panel, and the liquid crystal panel is mounted when the liquid crystal panel is mounted on the panel mounting portion. It is preferable that a vertical fitting portion for fitting the two is erected.

  Thereby, the liquid crystal panel is guided to the panel mounting portion only by inserting the liquid crystal panel along the fitting vertical portion, and the liquid crystal panel can be easily placed on the panel mounting portion.

  In the liquid crystal display device of the present invention, the panel placement portion and the fitting vertical portion of the panel holder include a spacer having elasticity, and the spacer is a panel in the panel placement portion and the fitting vertical portion. It is preferable that the entire circumference or a part of the circumference of the holder is provided.

  Thereby, since the spacer which has elasticity is provided in the panel mounting part and fitting vertical part of the panel holder in the whole circumference or a part of the panel holder, even if the liquid crystal display device receives an impact, the liquid crystal panel Can be prevented from being easily damaged.

  In the liquid crystal display device of the present invention, the elastic spacer partially provided in the fitting vertical portion of the panel holder may have different flexibility depending on the installation location. preferable.

  Thus, for example, a hard spacer can be used on the lower side of the liquid crystal display device in consideration of the weight of the liquid crystal panel, and a hard spacer can be used on one side of the liquid crystal display device in consideration of expansion / contraction. Can be used. For example, a soft spacer can be used on the upper side of the liquid crystal display device in consideration of the weight of the liquid crystal panel, and a soft spacer is used on the other side of the liquid crystal display device in consideration of expansion / contraction. be able to.

  In the liquid crystal display device of the present invention, it is preferable that the panel holder and the lamp holder are made of the same material.

  Thereby, when the panel holder and the lamp holder are integrated with each other in the second fitting portion, the expansion rate and the shrinkage rate are the same. Breakage can be prevented.

  In the liquid crystal display device of the present invention, it is preferable that the panel holder and the lamp holder are made of plastic.

  Thereby, weight reduction of a liquid crystal display device can be achieved. In addition, it is easy to process the uneven portion.

  In the liquid crystal display device of the present invention, the second fitting portions provided in the lamp holder and the panel holder are provided at the four corners of the lamp holder and the panel holder, and the second fitting portions at the four corners. It is preferable that the sizes of the concave portions in the portions are different from each other.

  Thereby, when the panel holder and the lamp holder are integrated with each other in the second fitting portion, even if the panel holder and the lamp holder are displaced due to expansion or contraction, some of the concave portions of the second fitting portion are formed. By making it larger, it is possible to prevent the second fitting portion from being damaged.

  In the liquid crystal display device of the present invention, as described above, the liquid crystal panel is sandwiched between the panel fixing bracket and the panel holder, and the diffusion plate and the lamp holder are sandwiched between the panel holder and the rear chassis. In addition, the lamp holder and the rear chassis are each provided with a first fitting portion that is an uneven portion that is fitted between the lamp holder and the rear chassis. A second fitting portion composed of a concavo-convex portion to be fitted to each other between the lamp holder and the panel holder is provided, and the panel holder and the panel fixing bracket are provided between the panel fixing bracket and the panel holder. A third fitting portion composed of a concavo-convex portion fitted to each other is provided.

  Therefore, the liquid crystal panel is sandwiched between the panel fixing bracket and the panel holder, and the diffusion plate and the lamp holder are sandwiched between the panel holder and the rear chassis. Therefore, since each member is only laminated, each member can be easily integrated.

  Further, when assembling, the lamp holder and the rear chassis are each provided with a first fitting portion that is an uneven portion that is fitted between the lamp holder and the rear chassis. What is necessary is just to insert the convex-concave corresponding to the 1st fitting part formed in the lamp holder in any one of the uneven | corrugated | grooved part of the made 1st fitting part.

  Further, since the lamp holder and the panel holder are each provided with a second fitting portion composed of a concavo-convex portion that is fitted between the lamp holder and the panel holder, the lamp assembled to the rear chassis. What is necessary is just to insert the convex-concave corresponding to the 2nd fitting part formed in the panel holder in any one of the uneven | corrugated | grooved part of the 2nd fitting part formed in the holder.

  Further, since the panel holder and the panel fixing bracket are respectively provided with third fitting portions made of concavo-convex portions that are fitted to each other between the panel fixing bracket and the panel holder, the rear chassis and the lamp holder are provided. The corresponding concave-convex portion of the third fitting portion formed on the panel fixing bracket may be inserted into one of the concave-convex portions of the third fitting portion formed in the panel holder in which is integrated.

  Thus, since each member is assembled by the 1st fitting part-the 3rd fitting part which consists of a concavo-convex part, positioning of each member can be easily performed only by inserting a convex part into a crevice, for example. . Therefore, in the case of assembling in an upright state, it is possible to provide a liquid crystal display device that can be easily integrated and that can easily position each member.

  An embodiment of the present invention will be described with reference to FIGS. 1 to 6 as follows.

  As shown in FIG. 2, the liquid crystal display device 1 according to the present embodiment diffuses received light in order from the front in the thickness direction, the panel fixing bracket 10, the liquid crystal panel 20, the panel holder 30, the optical sheet 2. The diffuser plate 3 that emits the light, the lamp holder 40 having a backlight 41 such as a plurality of fluorescent tubes, and the rear chassis 50 are incorporated.

  The liquid crystal panel 20 has a general rectangular shape in which liquid crystal is sealed between a pair of glass substrates. The edge of the liquid crystal panel 20 includes the upper panel fixing bracket 10 and the lower panel holder. 30. As shown in FIG. 3, the liquid crystal panel 20 has a source side circuit board 22 for driving the liquid crystal panel on the long side of the upper part of the liquid crystal display device 1 via a flexible source side wiring film 21. Is connected. Further, on the short side that is perpendicular to the long side and that is on the right side or the left side of the liquid crystal display device 1, for example, a gate side circuit board 23 that is paired with the source side circuit board 22 for driving the liquid crystal panel is a flexible gate. They are connected via the side wiring film 24.

  The panel fixing bracket 10 accommodates the liquid crystal panel 20 from the front, and each pair of panel fixing bracket long side members 11 having a substantially L-shaped cross section formed by a sheet metal press using a conductive metal plate, for example. And it consists of the frame which has the panel fixing metal short side member 12. FIG. The panel fixing bracket long side member 11 and the panel fixing bracket short side member 12 are joined by, for example, rivets 13 at each corner of the frame, as shown in FIGS.

  In the present embodiment, as shown in FIG. 2, the panel fixing bracket 10, the liquid crystal panel 20, the panel holder 30, the optical sheet 2, the diffusion plate 3, the lamp holder 40, and the rear chassis 50 are formed by uneven portions described later. After being fitted and positioned, it is screwed by a through screw 5 penetrating from the panel fixing bracket 10 to the rear chassis 50. Therefore, screw holes for passing through the through screw 5 are formed at various locations on the panel fixing bracket 10, the panel holder 30 and the rear chassis 50.

  Specifically, each panel fixing metal long side member 11 is provided with a fixing metal penetrating screw hole 10a at a position obtained by dividing the panel fixing metal long side member 11 by about 1/3. Further, the fixing bracket through screw holes 10a are provided in the panel fixing bracket short side member 12 at two locations near each corner of the panel fixing bracket short side member 12 respectively.

  On the other hand, in the present embodiment, the panel fixing bracket 10, the liquid crystal panel 20, and the panel holder 30 are integrated by screwing the panel fixing bracket 10 and the panel holder 30 with the module combining screw 6. It has become.

  For this reason, each panel fixing metal long side member 11 is provided with a fixing metal panel combining screw hole 10b through which the module combining screw 6 is inserted at the center position and both ends. In addition, the fixing bracket panel united screw hole 10b is not drilled at the center position of the panel fixing bracket short side member 12 in particular. The reason for this is that the fixing metal panel combining screw holes 10b are present at both ends of the panel fixing metal long side member 11, and this is because the fixing metal panel combining screw holes 10b are present at both ends of the panel fixing metal short side member 12. This means that the panel fixing bracket short-side member 12 is shorter than the panel fixing bracket long-side member 11, and in particular, the fixing bracket panel combining screw hole 10b cannot be provided and fixed, and the liquid crystal panel 20 is connected to the gate side circuit board 23 via the flexible gate side wiring film 24, so that there is a possibility that the insertion of the module combination screw 6 may be an obstacle. is there.

  Note that the number of the fixing metal penetrating screw holes 10a and the fixing metal panel combining screw holes 10b is not necessarily limited to this, and more can be formed. It is also possible to drill these fixing metal penetrating screw holes 10a and fixing metal panel combining screw holes 10b, and not to insert the through screws 5 and the module combining screws 6 for a part thereof. In addition, in the present embodiment, the positions of the fixing metal through screw holes 10a and the fixing metal panel combining screw holes 10b can be drilled at different positions.

  Further, in the present embodiment, it is preferable that the fixing metal through screw holes 10a and the fixing metal panel combining screw holes 10b are provided alternately.

  Next, the lamp holder 40 includes a reflecting plate (not shown) on the lower side, and can reflect the light from the backlight 41 to irradiate the liquid crystal panel 20. As described above, the backlight 41 includes, for example, a plurality of fluorescent tubes. Each of these fluorescent tubes has an elongated bar shape, and extends in the long side direction, that is, the left and right direction of the liquid crystal display device 1 in the lamp holder 40, and in the short side direction, that is, the vertical direction of the liquid crystal display device 1. The lamp holders 40 are supported by the lamp holder 40 by being disposed at intervals and being inserted into the lamp holder frame 42 of the lamp holder 40 at both ends. The reflecting plate is made of, for example, white plastic containing titanium oxide in order to increase the reflection efficiency.

  Further, in this embodiment, the panel holder 30 is provided with a holder through screw hole 30a at the same plane position as the fixing metal through screw hole 10a of the panel fixing metal 10 in order to insert the through screw 5. In addition, a holder combined screw hole 30b is provided at the same plane position as the fixed bracket panel combined screw hole 10b of the panel fixing bracket 10. The holder through screw hole 30a has an oblong hole shape that is long in the horizontal direction as shown in FIG. 5 in consideration of the difference in expansion rate and contraction rate between the panel fixing bracket 10 and the panel holder 30. ing.

  The diffusion plate 3 has a rectangular shape that is substantially the same shape as the liquid crystal panel 20, and the optical sheet 2 is laminated on the surface thereof. The optical sheet 2 is not limited to one type and may be formed of a plurality of layers. The optical sheet 2 is composed of layers such as a polarizing film and a sheet having a function of absorbing high frequency noise. The edges of the diffusion plate 3 and the optical sheet 2 are accommodated in a state of being fitted to the edge of the lamp holder 40.

  Therefore, the light emitted from the backlight 41 is reflected directly or by a reflecting plate and enters the diffusion plate 3, is diffused by the diffusion plate 3, passes through the optical sheet 2, and is irradiated on the liquid crystal panel 20. At that time, unnecessary high frequency noise is removed by the optical sheet 2, whereby the liquid crystal panel 20 is irradiated with a uniform luminance distribution.

  Next, the rear chassis 50 is formed of a conductive metal plate and is box-shaped with an open surface and can be accommodated in the panel fixing bracket 10. A chassis standing wall 51 is formed that is bent at a substantially right angle and rises. Further, the rear chassis 50 has a through-chassis at the same plane position as the fixing metal through screw hole 10 a of the panel fixing metal 10 and the holder through screw hole 30 a of the panel holder 30 for screwing with the through screw 5. A screw hole 50a is provided.

  Here, the positioning of the lamp holder 40 and the panel holder 30 with respect to the rear chassis 50 in the liquid crystal display device 1 of the present embodiment will be described in detail.

  In the present embodiment, the liquid crystal display device 1 is assembled in a standing state. For this reason, each member can be easily positioned by providing each member with a convex portion and a fitting hole therefor.

  Specifically, as shown in FIG. 1, lamp holder positioning protrusions 43 are formed at four corners on the back surface of the lamp holder 40, and the lamp holder positioning protrusions 43 are formed on the rear chassis 50. A rear chassis hole 52 is formed at a corresponding position. Further, the chassis standing wall 51 of the rear chassis 50 is substantially inscribed in the outer shape of the lamp holder 40 and bent up at a substantially right angle to rise. Therefore, the lamp holder positioning projection 43 is easily fitted into the rear chassis hole 52 by fitting the lamp holder 40 to the rear chassis 50 side. As a result, the lamp holder 40 is easily accommodated while being positioned in the rear chassis 50.

  Next, in the lamp holder 40, a lamp holder stand 42 is provided on the left and right side edges of the liquid crystal display device 1 so as to stand up in a substantially L-shaped cross section. The upper surface height of the lamp holder mount 42 is substantially the same as the upper end of the chassis standing wall 51. Further, a columnar panel holder positioning projection 44 is provided on the outer surface of the lamp holder frame 42, and a sheet placing portion 45 is provided on the inner side.

  The diffusion plate 3 and the optical sheet 2 are placed on the sheet placement portion 45, and the panel holder positioning projection 44 rises along the outer shapes of the diffusion plate 3 and the optical sheet 2. Therefore, the diffusion plate 3 and the optical sheet 2 are stacked and fitted into the panel holder positioning projection 44 so that the diffusion plate 3 and the optical sheet 2 are easily placed on the sheet placement portion 45 of the lamp holder 40. And stored in a positioned state.

  Next, the panel holder 30 is formed with a panel holder hanging portion 32 that hangs down in a substantially L shape on the outer peripheral portion. The panel holder hanging portion 32 is formed on the outside of the rear standing wall 51 of the rear chassis 50. Hangs down to a position where it is fitted approximately. Therefore, the holder positioning projection 44 is easily fitted into the panel holder positioning hole 31 by fitting the panel holder 30 to the lamp holder 40 side. As a result, the panel holder 30 is easily fitted and accommodated while being positioned on the lamp holder 40.

  As shown in FIG. 6A, the panel holder hanging portion 32 of the panel holder 30 is provided with a locking claw 38 having elasticity, and the chassis standing wall 51 of the rear chassis 50 includes As shown in FIG. 1, a protruding locking portion 53 that locks the locking claw 38 is formed. For this reason, when the panel holder hanging portion 32 of the panel holder 30 is mixed in the chassis standing wall 51, the locking claw 38 is locked so as not to be detached from the locking portion 53. However, the panel holder 30 can be simply temporarily fixed to the rear chassis 50.

  Further, a panel holder positioning hole 31 is formed in the panel holder 30 at a position corresponding to the panel holder positioning projection 44.

  In the present embodiment, as shown in FIG. 2, the panel holder positioning holes 31 are provided at the four corners of the panel holder 30, and the sizes of the holes are different. That is, the lamp holder 40 and the panel holder 30 are exposed to expansion due to temperature rise in the backlight 41 and expansion due to humidity. Therefore, the lamp holder 40 and the panel holder 30 are not necessarily expanded integrally, and may be displaced during expansion. Thus, in the present embodiment, the lower left corner of the liquid crystal display device 1 is considered as a reference point and a floating point, and the four corners of the other lamp holder 40 and panel holder 30 are considered to be out of position. Therefore, in the present embodiment, as shown in FIG. 6B, first, the panel holder positioning hole 31 of the panel holder 30 in the lower left corner of the liquid crystal display device 1 is a column of the projection 44 for positioning the panel holder. It has the same inner diameter as the outer shape. In addition, the panel holder positioning hole 31 of the panel holder 30 in the lower right corner of the liquid crystal display device 1 has an oblong hole that is long in the left-right direction of the liquid crystal display device 1. Further, the panel holder positioning hole 31 of the panel holder 30 in the upper left corner of the liquid crystal display device 1 has a long oval shape in the vertical direction of the liquid crystal display device 1. Finally, the panel holder positioning hole 31 of the panel holder 30 in the upper right corner of the liquid crystal display device 1 has a circular hole having the long diameter of the oval hole. With these hole shapes, even when the lamp holder 40 and the panel holder 30 are displaced, they can cope with the expansion.

  Further, in the present embodiment, the lamp holder 40 and the panel holder 30 are made of a homogeneous material such as polycarbonate, in order to reduce the displacement at the time of expansion.

  Next, a panel holder base 33 is formed on the outer peripheral edge of the panel holder 30 made of a frame, and a panel holder inner fitting part 34 having an L-shaped cross section is formed inside the panel holder base 33. Is formed. The panel holder inner fitting portion 34 includes a placement portion 34a and a vertical portion 34b. As shown in FIGS. 6 (a) and 6 (b), the placement portion 34a is elastically mounted on the entire periphery. The mounting surface spacer 35 is provided, and the vertical portion 34b has elasticity at two locations near the four corners of the panel holder 30 made of a frame and at two locations on the upper and lower portions of the liquid crystal display device 1, respectively. A wall spacer 36 is provided. In the present embodiment, the wall spacer 36 has a different elastic force depending on the installation position. Specifically, as shown in FIG. 6B, a hard wall surface spacer 36 a made of a hard material is used on the lower side of the liquid crystal display device 1 in consideration of the weight of the liquid crystal panel 20. In contrast, a wall surface flexible spacer 36b made of a soft material is used on the upper side of the liquid crystal display device 1. The left side of the liquid crystal display device 1 uses a hard wall spacer 36a made of a hard material, while the right side of the liquid crystal display device 1 uses a wall soft spacer 36b made of a soft material. This is because, in the present embodiment, for example, the lower left corner of the liquid crystal display device 1 is used as a fixed reference point.

  The mounting surface spacer 35 and the wall surface spacer 36 are made of urethane, for example.

  With the configuration of the panel holder 30 described above, the liquid crystal panel 20 is easily fitted in a state where the liquid crystal panel 20 is positioned on the panel holder 30 by fitting the liquid crystal panel 20 to the panel holder inner fitting portion 34 of the panel holder 30. The Further, in the state in which the liquid crystal panel 20 is fitted to the panel holder 30, the wall surface spacer 36 is provided in the corner portion, and the placement portion 34a is provided with the placement surface spacer 35. The corners and edges of the liquid crystal panel 20 are not damaged.

  Next, a fixing bracket positioning projection 37 is formed on the upper surface of the panel holder base portion 33 of the panel holder 30, and a panel fixing bracket hole 14 is formed at a corresponding position in the panel fixing bracket 10. . Furthermore, the fixing bracket step 15 is formed in the panel fixing bracket 10 so as to hang down substantially along the outer wall 33 a of the panel holder base 33. Therefore, the panel fixing bracket hole 14 of the panel fixing bracket 10 can be easily inserted into the panel holder 30 by fitting the fixing bracket step portion 15 of the panel fixing bracket 10 to the panel holder base 33 of the panel holder 30 of the panel holder 30. The fixing metal positioning projection 37 can be fitted. As a result, the panel fixing bracket 10 is easily fitted on the panel holder 30 while being positioned. In the present embodiment, a fixing metal back spacer 11 is provided on the back surface of the panel fixing metal 10. For this reason, the liquid crystal panel 20 is sandwiched and fixed between the panel holder 30 and the panel fixing bracket 10 so as not to move substantially. Further, the edge of the liquid crystal panel 20 is not damaged.

  A procedure for assembling the liquid crystal display device 1 having the above configuration will be described. In the present embodiment, since the liquid crystal display device 1 is large, for example, it is assembled in an upright state. However, the present invention is not necessarily limited to this, and for example, it is possible to assemble in a state of being laid on a conveyor (not shown).

  First, as shown in FIG. 1, the lamp holder 40 is fitted along the chassis standing wall 51 of the rear chassis 50, and the lamp holder positioning protrusions 43 formed at the four corners on the back surface of the lamp holder 40 are inserted into the rear chassis. The rear chassis holes 52 are formed in 50 predetermined positions. Accordingly, the lamp holder 40 is housed and fixed in the rear chassis 50 in a state where the lamp holder 40 is positioned in the rear chassis 50.

  Next, the diffusing plate 3 and the optical sheet 2 are fitted along the panel holder positioning projections 44 into the sheet mounting portion 45 formed on the upper surface of the lamp holder mount 42 in the lamp holder 40. Thereby, the diffusion plate 3 and the optical sheet 2 are laminated in a fitting state within the panel holder positioning projection 44 of the lamp holder mount 42 in the lamp holder 40.

  Next, the panel holder 30 is externally fitted along the chassis standing wall 51 of the rear chassis 50, and the panel holder positioning protrusion 44 formed on the upper surface of the lamp holder mount 42 in the lamp holder 40 is attached to the panel holder 30. The panel holder positioning hole 31 is fitted. Thereby, the panel holder 30 is easily integrated with the lamp holder 40 in a state where the panel holder 30 is positioned on the lamp holder 40.

  Next, the liquid crystal panel 20 is placed on the panel holder inner fitting portion 34 of the panel holder 30. At this time, the panel holder inner fitting portion 34 is provided with a mounting surface spacer 35 having elasticity on the mounting surface of the liquid crystal panel 20 on the entire periphery, and a side surface with which the end portion of the liquid crystal panel 20 abuts. Also on the side, wall spacers 36 are provided at two positions at each corner of the panel holder inner fitting portion 34. In addition, on the upper surface side of the liquid crystal panel 20, the panel fixing metal back spacer 16 is provided around the entire back surface of the panel fixing metal 10. Therefore, the mounting surface spacer 35, the wall surface spacer 36, and the panel fixing bracket back side spacer 16 function as a shock absorbing material against an impact or the like due to a roll or a pitch of the liquid crystal display device 1. The liquid crystal panel 20 is sandwiched and fixed between the panel holder 30 and the panel fixing bracket 10 by the mounting surface spacer 35, the wall spacer 36, and the panel fixing bracket rear side spacer 16 so as not to move substantially. ing.

  Next, the panel fixing bracket 10 is fitted into the panel holder 30 along the fixing bracket step portion 15 of the panel fixing bracket 10 along the outer wall 33 a of the panel holder base 33 in the panel holder 30. Thereby, the panel fixing bracket hole 14 formed in the panel fixing bracket 10 is passed through the fixing bracket positioning protrusion 37 provided on the upper surface of the panel holder 30. Thereby, the panel fixing metal fitting 10 is integrated with this panel holder 30 in the state positioned by the panel holder 30.

  Through the above assembly operation, the rear chassis 50 to the panel fixing bracket 10 are provisionally integrated. That is, it is not screwed, but is integrated so that it cannot be easily removed.

  Next, the process proceeds to the screwing step.

  In the present embodiment, as shown in FIG. 2, the through screw 5 is rear-mounted from the front surface side of the panel fixing metal 10 through the fixing metal through screw hole 10 a of the panel fixing metal 10 and the holder through screw hole 30 a of the panel holder 30. The chassis 50 is screwed into the chassis through screw hole 50a. Thereby, the panel fixing bracket 10 to the rear chassis 50 are integrally fastened by the through screws 5.

  Next, in the present embodiment, the module combining screw 6 is threaded into the holder combining screw hole 30b of the panel holder 30 through the module combining screw hole 10b of the panel fixing bracket 10 from the front side of the panel fixing bracket 10. . As a result, the panel fixing bracket 10 to the panel holder 30 are integrally fastened by the module combining screw holes 10b.

  Finally, in the liquid crystal display device 1 of the present embodiment, a disassembly / separation method for replacing parts in maintenance or the like will be described.

  For example, when only exchanging and maintaining the lamp holder 40, the module uniting screw 6 may not be removed, and only the through screw 5 may be removed and disassembled and separated. In this case, since the panel fixing bracket 10 to the panel holder 30 are disassembled in an integrated state, the lamp holder 40 can be replaced or maintained with a reduced number of parts after disassembly. Become.

  In the present embodiment, the lamp holder positioning protrusion 43 and the rear chassis hole 52 as the first fitting portion are formed, and the panel holder positioning protrusion 44 and the panel holder positioning hole 31 as the second fitting portion are formed. The fixing metal positioning projection 37 and the panel fixing metal hole 14 are formed as a third fitting portion. However, the above-described unevenness relationship is not necessarily limited to this, and can be reversed.

  With the liquid crystal display device 1 having the above-described configuration, it is possible to suppress deformation due to thermal expansion as much as possible even when the weight is reduced while the function of securely housing the liquid crystal panel 20 is constituted by one member. Furthermore, it is possible to provide the liquid crystal display device 1 in which the panel holder 30 can be easily removed.

  Thus, in the liquid crystal display device 1 according to the present embodiment, the liquid crystal panel 20 is sandwiched between the panel fixing bracket 10 and the panel holder 30, and the diffusion plate 3 and the lamp holder 40 are connected to the panel holder 30 and the rear chassis. 50. Therefore, since each member is only laminated, each member can be easily integrated.

  Further, during assembly, the lamp holder 40 and the rear chassis 50 are provided with a lamp holder positioning projection 43 as a first fitting portion that is an uneven portion that is fitted between the lamp holder 40 and the rear chassis 50. The rear chassis hole 52 is provided. For this reason, the corresponding lamp holder positioning projections 43 formed on the lamp holder 40 may be inserted into the rear chassis holes 52 formed in the rear chassis 50.

  Further, the lamp holder 40 and the panel holder 30 are provided with a panel holder positioning projection 44 and a panel holder positioning as a second fitting portion which is an uneven portion fitted between the lamp holder 40 and the panel holder 30. A hole 31 is provided. For this reason, the panel holder positioning projections 44 formed on the lamp holder 40 assembled to the rear chassis 50 may be inserted into the corresponding panel holder positioning holes 31 formed on the panel holder 30.

  Further, the panel holder 30 and the panel fixing bracket 10 are provided with a fixing bracket positioning projection 37 and a panel as a third fitting portion composed of concave and convex portions that are fitted to each other between the panel fixing bracket 10 and the panel holder 30. A fixing hole 14 is provided. For this reason, the corresponding panel fixing bracket hole 14 formed in the panel fixing bracket 10 may be inserted into the fixing bracket positioning protrusion 37 formed in the panel holder 30 in which the rear chassis 50 and the lamp holder 40 are integrated. .

  Thus, since each member is assembled by the 1st fitting part-the 3rd fitting part which consist of a concavo-convex part, it is easy to position each member just by inserting a convex part into a concave part or a concave part into a convex part. It can be carried out. Therefore, in the case of assembling in an upright state, it is possible to provide the liquid crystal display device 1 that can be easily integrated and can easily position each member.

  Further, in the liquid crystal display device 1 of the present embodiment, a chassis standing wall 51 is erected at the edge of the rear chassis 50, and a lamp holder base 42 that supports the backlight 41 at the end of the lamp holder 40. Is provided, and the side wall of the lamp holder base 42 is formed so as to be fitted into the chassis standing wall 51.

  Thus, when the lamp holder 40 and the rear chassis 50 are fitted to each other by the first fitting portion, the first fitting portion only needs to be provided along the side wall of the lamp holder mount 42 within the chassis standing wall 51. It is guided so that the fitting in can be achieved. Therefore, the fitting at the first fitting portion is further facilitated.

  Further, in the liquid crystal display device 1 of the present embodiment, a chassis standing wall 51 is erected on the edge of the rear chassis 50, and a panel holder hanging part 32 is provided on the edge of the panel holder 30. At the same time, it is preferable that the panel holder hanging part 32 is formed so as to be fitted on the chassis standing wall 51.

  In the liquid crystal display device 1 according to the present embodiment, a panel holder hanging portion 32 is provided at the edge of the panel holder 30, and the panel holder hanging portion 32 is externally fitted to the chassis standing wall 51. It is formed so that.

  Thus, when the panel holder 30 and the lamp holder 40 are fitted in the second fitting portion, the panel holder hanging portion 32 is merely fitted along the chassis standing wall 51, and the fitting in the second fitting portion is performed. You will be guided so that a match can be achieved. Therefore, the fitting at the second fitting portion is further facilitated.

  Further, in the liquid crystal display device 1 according to the present embodiment, the panel holder hanging portion 32 of the panel holder 30 is provided with a locking claw 38 having elasticity, and the chassis standing wall 51 of the rear chassis 50 is provided. When the panel holder hanging part 32 of the panel holder 30 is fitted into the chassis standing wall 51, the locking claw 38 is locked so that the panel holder hanging part 32 does not come off the chassis standing wall 51. A locking portion 53 is formed.

  Thereby, when the panel holder hanging part 32 of the panel holder 30 is fitted into the chassis standing wall 51, the locking portion 53 is engaged so that the panel holder hanging part 32 does not come off from the chassis standing wall 51. The pawl 38 is locked. Therefore, the panel holder 30 can be temporarily fixed to the rear chassis 50 by the locking claw 38 and the locking portion 53 without using, for example, screws.

  Further, in the liquid crystal display device 1 of the present embodiment, the panel holder 30 is formed with a panel holder base portion 33 that rises in a convex shape, and the panel fixing bracket 10 is fitted to the panel holder base portion 33. A fixing metal step 15 is formed.

  Thus, when the panel fixing bracket 10 and the lamp holder 40 are fitted in the third fitting portion, the fixing bracket step portion 15 is simply moved along the panel holder base portion 33 rising in a convex shape. It is guided so that the fitting at the fitting portion can be achieved. Therefore, the fitting at the third fitting portion is further facilitated.

  Further, in the liquid crystal display device 1 according to the present embodiment, when the lamp holder 40 is provided with the sheet placing portion 45 on which the diffusion plate 3 is placed, and the diffusion plate 3 is placed on the sheet placing portion 45. A panel holder positioning projection 44 is provided as a diffusion plate fitting portion to which the diffusion plate 3 is fitted.

  Accordingly, the diffusion plate 3 is guided to the sheet placement portion 45 by simply inserting the diffusion plate 3 along the panel holder positioning protrusion 44, and the diffusion plate 3 is easily placed on the sheet placement portion 45. be able to.

  Further, in the liquid crystal display device 1 of the present embodiment, the panel holder 30 is provided with a placement portion 34a as a panel placement portion on which the liquid crystal panel 20 is placed, and the liquid crystal panel 20 is placed on the panel placement portion 34a. A vertical portion 34b is erected as a fitting vertical portion into which the liquid crystal panel 20 is fitted when placed on the screen.

  As a result, the liquid crystal panel 20 can be guided to the mounting portion 34a only by inserting the liquid crystal panel 20 along the vertical portion 34b, and the liquid crystal panel 20 can be easily mounted on the mounting portion 34a.

  Further, in the liquid crystal display device 1 of the present embodiment, the placement portion 34a and the vertical portion 34b of the panel holder 30 include the placement surface spacer 35 and the wall surface spacer 36 having elasticity, and the placement surface spacer 35 and the wall surface. The spacer 36 is provided entirely or partially around the panel holder 30 in the placement portion 34a and the vertical portion 34b.

  Thereby, even if the liquid crystal display device 1 receives an impact, the liquid crystal panel 20 can be prevented from being easily damaged.

  Further, in the liquid crystal display device 1 of the present embodiment, the elastic wall spacer 36 partially provided on the vertical portion 34b of the panel holder 30 has different flexibility depending on the installation location. ing.

  Thereby, for example, the wall surface hard spacer 36a can be used on the lower side of the liquid crystal display device 1 in consideration of the weight of the liquid crystal panel 20, and expansion and contraction are considered on the left side surface side of the liquid crystal display device 1. Thus, the wall surface hard spacer 36a can be used. Further, for example, the wall surface flexible spacer 36b can be used on the upper side of the liquid crystal display device 1 in consideration of the weight of the liquid crystal panel 20, and the right side surface side of the liquid crystal display device 1 is considered in terms of expansion / contraction. A wall soft spacer 36b can be used.

  Moreover, in the liquid crystal display device 1 of this Embodiment, the panel holder 30 and the lamp holder 40 are comprised with the same raw material. Accordingly, when the panel holder 30 and the lamp holder 40 are integrated with each other at the second fitting portion, the expansion rate and the contraction rate are the same. Therefore, the second due to the deviation between the panel holder 30 and the lamp holder 40 is obtained. Breakage of the fitting portion can be prevented.

  In the liquid crystal display device 1 of the present embodiment, the panel holder 30 and the lamp holder 40 are made of plastic. Thereby, weight reduction of the liquid crystal display device 1 can be achieved. In addition, it is easy to process the uneven portion.

  Further, in the liquid crystal display device 1 of the present embodiment, the second fitting portions provided in the lamp holder 40 and the panel holder 30 are provided at the four corners of the lamp holder 40 and the panel holder 30, and at the four corners. The size of the concave portion in each second fitting portion is different.

  Accordingly, even when the panel holder 30 and the lamp holder 40 are integrated at the second fitting portion, even if the panel holder 30 and the lamp holder 40 are displaced due to expansion or contraction, a part of the second fitting is performed. By making the concave portion of the portion larger, it is possible to prevent the second fitting portion from being damaged.

  The present invention can be used for a liquid crystal display device in which at least a rear chassis, a lamp holder to which a backlight is attached, a diffusion plate, a panel holder, a liquid crystal panel, and a panel fixing bracket are incorporated in this order. Therefore, the present invention can be applied to uses such as a television and a monitor using the liquid crystal display device.

It is sectional drawing which shows one Embodiment of the liquid crystal display device in this invention. It is a disassembled assembly figure which shows the structure of the said liquid crystal display device. It is a perspective view which shows schematic structure of the liquid crystal panel of the said liquid crystal display device. (A) is a front view which shows the structure of the panel fixing bracket of the said liquid crystal display device, (b) is a side view which shows the structure of the panel fixing bracket of the said liquid crystal display device. It is a principal part front view which shows the structure below the panel holder in the said liquid crystal display device. (A) is a side view which shows the structure of the panel holder of the said liquid crystal display device, (b) is a front view which shows the structure of the panel holder of the said liquid crystal display device. (A) is sectional drawing which shows the structure of the conventional liquid crystal display device, (b) is sectional drawing which decomposes | disassembles and shows the structure of the said liquid crystal display device. It is a perspective view which shows the structure of the intermediate frame used for the said conventional liquid crystal display device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Optical sheet 3 Diffusion plate 5 Through screw 6 Module union screw 10 Panel fixing bracket 10a Fixing bracket penetration screw hole 10b Fixing bracket panel union screw hole 14 Panel fixing bracket hole (3rd fitting part)
20 Liquid crystal panel 30 Panel holder 30a Holder through screw hole 30b Holder combined screw hole 31 Panel holder positioning hole (second fitting portion)
32 Panel holder hanging part 33 Panel holder base part 34 Panel holder inner side fitting part 34a Mounting part (panel mounting part)
34b Vertical part (fitting vertical part)
35 Mounting surface spacer 36 Wall spacer 36a Wall hard spacer 36b Wall flexible spacer 37 Fixing bracket positioning projection (third fitting portion)
38 Locking Claw 40 Lamp Holder 41 Backlight 42 Lamp Holder Base 43 Lamp Holder Positioning Projection (First Fitting Part)
44 Projection for positioning the panel holder (second fitting part, diffusion plate fitting part)
45 Sheet placement part (diffuser plate placement part)
50 Rear chassis 50a Chassis through screw hole 51 Chassis standing wall 52 Rear chassis hole (first fitting portion)
53 Locking part

Claims (9)

In the thickness direction, at least the rear chassis, the lamp holder with the backlight attached, the diffusion plate, the panel holder, the liquid crystal panel and the panel fixing bracket are assembled in this order in the liquid crystal display device,
The liquid crystal panel is sandwiched between a panel fixing bracket and a panel holder, and the diffusion plate and the lamp holder are sandwiched between the panel holder and a rear chassis,
The lamp holder and the rear chassis are each provided with a first fitting portion composed of a concavo-convex portion that is fitted between the lamp holder and the rear chassis,
The lamp holder and the panel holder are each provided with a second fitting portion composed of a concave and convex portion fitted to each other between the lamp holder and the panel holder,
Each of the panel holder and the panel fixing bracket is provided with a third fitting portion including an uneven portion that is fitted between the panel fixing bracket and the panel holder.
The second fitting portions provided in the lamp holder and the panel holder are provided at the four corners of the lamp holder and the panel holder,
The size of the concave portion in each of the second fitting portions at the four corners is the size of the concave portion of the second fitting portion at one of the four corners of the second fitting portion at the other of the four corners. A liquid crystal display device, which is different from each other by being larger than the size of the recess. A chassis standing wall is erected at the edge of the rear chassis, and a lamp holder frame for supporting a backlight is provided at the end of the lamp holder,
Side wall of the lamp holder cradle liquid crystal display device according to claim 1, he characterized in that it is formed so as be fitted within the chassis vertical wall. A chassis standing wall is erected on the edge of the rear chassis, and a panel holder hanging part is provided on the edge of the panel holder,
Panel holder hanging portions of the panel holder, a liquid crystal display device according to claim 1, characterized in that it is formed so as to be fitted on the chassis vertical wall. A panel holder hanging portion is provided at the edge of the panel holder,
3. The liquid crystal display device according to claim 2 , wherein a panel holder hanging portion of the panel holder is formed so as to be fitted on the chassis standing wall. The panel holder hanging portion of the panel holder is provided with a locking claw having elasticity,
When the panel holder hanging portion of the panel holder is fitted into the chassis standing wall, the locking mechanism is provided so that the panel holder hanging portion does not come off from the chassis standing wall. 5. A liquid crystal display device according to claim 2, wherein a locking portion for locking the claw is formed. The panel holder is formed with a panel holder base that rises in a convex shape,
The said panel fixing bracket, the liquid crystal display device according to any one of claims 1 to 5, characterized in that the fixing bracket step portion to be fitted to the panel holder base portion. The lamp holder is provided with a diffusion plate mounting portion for mounting the diffusion plate, and a diffusion plate fitting for fitting the diffusion plate when mounting the diffusion plate on the diffusion plate mounting portion the liquid crystal display device according to any one of claims 1 to 6, characterized in that the parts are provided. The liquid crystal display device according to any one of claims 1 to 7, characterized in that it is constituted by the same material as the lamp holder and the panel holder. 9. The liquid crystal display device according to claim 8, wherein the panel holder and the lamp holder are made of plastic.

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