JP2009175378A - Liquid crystal module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal module capable of preventing deflection and deformation by a fixing strength of a bezel, and capable of enhancing grounding performance of an X-side wiring board. <P>SOLUTION: In this liquid crystal module, the X-side wiring board 14 connected to an end edge part along one long side of a liquid crystal cell 10 having a rectangular plane shape via a COF 13 is arranged with a space in an outer face (outer plate part) 1g of a double side plate 1e along one long side of a rear frame 1 having a rectangular plane shape; the bezel 11 covers an outside thereof with a space; both end parts of the bezel 11 are fixed to the rear frame, and the bezel 11 and the X-side wiring board 14 are fixed co-fastenedly to the outer plate part 1g of the rear frame 1 by a screw 17, in at least one portion other than both the end parts. The fixing strength of the bezel 11 is enhanced by the co-fastening fixation to prevent the deflection and the deformation, and the grounding performance of the X-side wiring board 14 is also enhanced therein. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid crystal module incorporated in a television, a personal computer or other electronic equipment, and more particularly, to a liquid crystal module improved so as to improve the fixing strength of a bezel and the grounding property of an X-side wiring board.

  A conventional medium-sized liquid crystal module usually has an X-side wiring substrate (X-PCB) connected to an edge along one long side of a liquid crystal cell having a rectangular planar shape via a COF (chip on film). Are arranged with a gap on the outer surface of the side plate along one long side of the rear frame having a rectangular planar shape, and the X-side wiring board is fixed to the side plate of the rear frame with screws. Then, the bezel is put on the outside with a gap, and both end portions of the bezel are fixed to the rear frame with screws.

On the other hand, a recess is provided in the vicinity of both ends of the short frame portion of the metal bezel, a screw hole is formed in the recess, and the hole of the X-PCB disposed on the lower surface side of the frame is covered with the bezel. A flat display device is also known in which the X-PCB is grounded to the bezel through the screw by screwing the screw into the screw hole of the bezel recess through the through hole of the frame (Patent Document 1).
Japanese Patent Laid-Open No. 9-258177

  However, since the above-mentioned conventional liquid crystal module has only the both ends of the bezel fixed to the rear frame with screws, it is difficult to say that the fixing strength of the central portion of the bezel is sufficient, and a drop / vibration test is performed. Then, the central portion of the bezel may be bent or deformed, and may contact the mounting component of the X-side wiring board and break down.

  Similarly, the flat display device of Patent Document 1 also fixes the short frame portion of the bezel at two locations near both ends by screwing screws into the screw holes of the recessed portions provided in the locations near both ends of the short frame portion of the bezel. Therefore, the mounting strength of the central portion is not sufficient, and the central portion of the bezel short frame portion may be bent or deformed due to dropping or vibration.

  The present invention has been made under the above circumstances, and the problem to be solved is a liquid crystal module capable of improving the grounding property of the X-side wiring board while increasing the fixing strength of the bezel to prevent bending and deformation. Is to provide.

  In order to solve the above-described problem, a liquid crystal module according to the present invention includes an X-side wiring board connected to an edge portion along one long side of a liquid crystal cell having a rectangular planar shape via a COF. The rear frame having a shape is arranged with a gap on the outer surface of the side plate along one long side, and the bezel is covered with a gap on the outside, and both ends of the bezel are fixed to the rear frame, and the bezel The X-side wiring board is fastened and fixed to the side plate of the rear frame with screws at least at one place other than both ends.

  In the liquid crystal module of the present invention, it is preferable that the joint fastening location is a central portion in the longitudinal direction of the bezel, and the side plate of the rear frame is convex toward the X-side wiring board at the joint fastening location. It is desirable to form the substrate supporting convex portion to be formed, and to form the substrate pressing concave portion which is bent toward the X-side wiring substrate in the bezel.

  Then, a screw hole for screwing a screw is formed in the top surface portion of the substrate support convex portion, and a screw insertion hole is formed in the bottom surface portion of the substrate holding recess and the X-side wiring board, and at least the bottom surface portion of the substrate holding recess It is preferable that the screw insertion hole is a long hole that is long in the length direction of the bezel or in a direction perpendicular to the bezel. Further, two screw holes are arranged in the length direction of the side plate of the rear frame. It is preferable that the screw insertion holes are formed in the top surface portion, and two screw insertion holes are arranged in the length direction of the bezel and formed in the bottom surface portion of the substrate pressing recess and the X-side wiring substrate.

  As in the liquid crystal module of the present invention, when the bezel and the X-side wiring board are fastened to the side plate of the rear frame with screws at least at one place other than both ends, the fixing strength of the entire bezel is improved. Since the bezel does not bend or deform even when it is subjected to a drop impact or vibration, it is possible to eliminate the concern that the bezel will come into contact with the mounted component of the X-side wiring board and break down. In addition, the X-side wiring board can be used not only for the rear frame but also for the bezel through the screws, and when the substrate supporting convex portion and the substrate pressing concave portion are formed as described above, through the substrate supporting convex portion, the substrate pressing concave portion and the screw. Since it is also grounded, the grounding property is also improved. Further, since the screws used for fixing the conventional X-side wiring board can be used, the number of parts and the number of assembly steps are not increased.

  In the liquid crystal module of the present invention, in the case where the joint fastening location is the central portion in the length direction of the bezel, the fastening strength of the bezel can be increased as a whole without being biased. Is most effective.

  Then, at the joint fastening location, a substrate support convex portion that curves toward the X-side wiring substrate is formed on the side plate of the rear frame, and a substrate pressing recess that curves toward the X-side wiring substrate is formed on the bezel. The substrate support convex part and the substrate pressing concave part serve as a spacer to secure the distance between the X side wiring board, the rear frame side plate and the bezel, and it is not necessary to use other spacers. As described above, the grounding property of the X-side wiring board can be improved through the substrate support convex portion and the substrate pressing concave portion.

  In addition, a screw hole for screwing a screw is formed in the top surface portion of the substrate support convex portion, and a screw insertion hole is formed in the bottom surface portion of the substrate holding recess and the X-side wiring substrate, and at least the bottom surface portion of the substrate holding recess If the screw insertion hole is a long hole extending in the length direction of the bezel or in a direction perpendicular to this, the positional relationship of the screw insertion hole of the substrate pressing recess with respect to the screw hole of the substrate support protrusion is the length of the rear frame side plate. If the positional relationship is slightly deviated in the direction perpendicular to the longitudinal direction of the rear frame side plate, it is within the allowable range of the long hole in the longitudinal direction of the bezel. Mounting and fixing can be performed by adjusting the positional deviation within an allowable range of a long hole that is long in the direction perpendicular to the length direction.

  Further, two screw holes are arranged in the length direction of the side plate of the rear frame to form the top surface portion of the substrate support convex portion, and two screw insertion holes are arranged in the length direction of the bezel to form the bottom surface of the substrate pressing concave portion. Even if two X-side wiring boards are mounted side by side in the length direction on the outer surface of the side plate of the rear frame, the two formed from the two screw insertion holes in the board holding recess These screws can be screwed into the two screw holes of the substrate support convex portion through the screw insertion holes formed at the abutting side ends of both X-side wiring boards and fixed together.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  1 is an exploded perspective view of a liquid crystal module according to an embodiment of the present invention, FIG. 2 is a sectional view of the liquid crystal module, FIG. 3 is a rear view of the liquid crystal module, and FIG. 4 is a portion surrounded by a circle P in FIG. FIG. 5 is an exploded perspective view of the main part of the liquid crystal module.

  An outline of the overall configuration of the liquid crystal module is as follows. As shown in FIGS. 1 and 2, a light reflecting sheet 2 bent into an inverted trapezoidal shape is provided inside a shallow box-shaped rear frame 1 made of sheet metal. On the light reflecting sheet 2, a plurality of U-shaped cold cathode tubes 3 are arranged in parallel and supported by a lamp holder 4.

  A lamp socket 5 is attached to the end of the U-shaped cold cathode tube 3, and these lamp sockets 5 are formed on the bottom plate 1 b of the rear frame 1 along the side plate 1 a on one short side of the rear frame 1. The socket is fitted into the socket fitting openings 1c, 1c, and the lead wires are drawn out behind the rear frame. The end of the U-shaped cold cathode 3 to which the lamp socket is attached and the U-shaped bent part on the opposite side are attached to the side plates 1a and 1d on the short side of the rear frame 1, respectively. 6 is covered.

  The long side plates 1e and 1f of the rear frame 1 are both bent into an inverted U shape to form a double side plate. On the top surfaces of the double side plates 1e and 1f and the top surfaces of the lamp frames 6 and 6, respectively. The four peripheral edges of the two optical sheets 7 and 8 are placed. These optical sheets are light diffusion sheets that diffuse the light emitted from the U-shaped cold cathode tube 9 and uniformly irradiate the liquid crystal cell 10, and the upper optical sheet 8 is a thin light diffusion sheet, As the lower optical sheet 7, a thick panel-like light diffusion sheet (light diffusion plate) which is difficult to bend is used.

  The four peripheral edges of the optical sheets 7 and 8 are pressed by two L-shaped synthetic resin cell guides 9 and 9 mounted on the double side plates 1e and 1f of the rear frame 1 and the lamp frames 6 and 6, respectively. The four peripheral edges of the liquid crystal cell 10 are placed on the cell guides 9 and 9. The four peripheral edges of the liquid crystal cell 10 are pressed and fixed by two long bezels 11, 11 made of sheet metal and two short bezels 12, 12, and these bezels 11, 11, 12, 12 are fixed. In both cases, both ends are screwed to corner portions of the rear frame 1 (both ends of the double side plates 1e and 1f of the rear frame 1).

  An X-side wiring board (X-PCB) 14 is connected to an edge portion along one long side of the liquid crystal cell 10 via a COF (chip on film) 13 on which a source driver IC chip 13a is mounted. A Y-side wiring board 16 (Y-PCB) is connected to an edge along the short side of the liquid crystal cell 10 via a COF 15 on which a gate driver IC chip is mounted. As shown in FIG. 2, the X-side wiring board 14 is attached to the outer side surface of the double side plate 1e along one long side of the rear frame, that is, the outer side plate portion 1g of the double side plate 1e with a gap. The Y-side wiring board 16 is attached to the outer surface of one lamp frame 6.

  2 to 5, the major feature of this liquid crystal module is that the side plate portion 11 a of one long bezel 11 covering the X side wiring board 14, the length of one side of the X side wiring board 14, and the rear frame 1. The outer side plate portion 1g of the double side plate 1e along the side is in a position fastened together with screws 17 in at least one place other than both end portions.

  That is, at the central portion in the length direction of the outer plate 1g of the rear frame 1, a substrate support convex portion 1h that curves toward the X-side wiring substrate 14 is drawn by drawing as shown in FIGS. A screw hole 1j into which the screw 17 is screwed is formed in the flat top surface portion 1i of the substrate support convex portion 1h.

  On the other hand, a substrate pressing concave portion 11b that is bent toward the X-side wiring substrate 14 is formed by drawing at the center in the length direction of the bezel side plate portion 11a so as to face the substrate supporting convex portion 1h. A screw insertion hole 11d is formed in the flat bottom surface portion 11c of the substrate pressing recess 11b. A screw insertion hole 14a is formed at the center in the length direction of the X-side wiring board 14 so as to correspond to the screw hole 1j and the screw insertion hole 11d.

  In FIG. 5, reference numeral 11e denotes a relief recess formed in the bezel side plate portion 11a so that the connector 14b mounted on the X side wiring board 14 and the bezel side plate portion 11a do not interfere with each other.

  Among the screw insertion holes 11d and 14a, at least the screw insertion hole 11d formed in the bottom surface portion 11c of the substrate pressing recess 11b is a long hole extending in the length direction of the bezel 11, as shown in FIG. If such a long hole is used, the positional relationship of the screw insertion hole 11d of the substrate pressing recess 11b with respect to the screw hole 1j of the substrate support convex portion 1h is slightly shifted in the length direction of the outer plate portion 1g of the rear frame 1. Even in this case, it is possible to adjust the positional relationship within the permissible range of the long holes and fix them together.

  The screw insertion hole 11d of the substrate pressing recess 11b may be a long hole that is long in a direction perpendicular to the length direction of the bezel 11, and when such a long hole is formed, the substrate pressing recess 11b with respect to the screw hole 1j of the substrate support protrusion 1h. Even if the positional relationship of the screw insertion hole 11d is slightly shifted in the direction perpendicular to the length direction of the outer plate 1g of the rear frame 1, it can be adjusted and fixed together within the allowable range of the long hole. Become.

  Further, not only the screw insertion hole 11d of the substrate holding recess 11b but also the screw insertion hole 14a of the X side wiring board 14 may be a long hole extending in the length direction of the X side wiring board or in the direction perpendicular thereto. Then, even if the positional relationship of the screw insertion hole 14a of the X-side wiring board with respect to the screw hole 1j of the board support convex part 1h is slightly shifted in the length direction of the outer plate part 1g of the rear frame 1 or in a direction perpendicular thereto, It can be adjusted and fixed together within the allowable range of the long hole.

  As shown in FIGS. 2 and 3, the liquid crystal module has an X-side wiring board 14 overlaid on the board support convex part 1h of the outer plate part 1g of the rear frame 1, and the board pressing concave part 11b of the bezel side plate part 11a from the outside. And the X-side wiring board 14 is sandwiched between the board-supporting convex part 1h and the board-holding concave part 11b, and the screws 17 are inserted from the screw insertion holes 11d of the board-holding concave part 11b through the screw-insertion holes 14a of the X-side wiring board 14. By screwing into the screw hole 1i of the portion 1h, the bezel side plate portion 11a and the X side wiring substrate 14 are fastened and fixed to the outer plate portion 1g of the rear frame 1 at the center in the length direction. Note that both end portions of the bezel 11 are fixed to the corner portions of the rear frame 1 (both end portions of the double side plate 1e) with screws from the front side as described above.

  As described above, when the bezel side plate portion 11a and the X side wiring board 14 are fastened and fixed to the outer side plate portion 1e of the rear frame 1 with screws 17 at the central portion in the length direction, the fixing strength of the bezel 11 as a whole is increased. Improve substantially evenly. Accordingly, the bezel 11 does not bend or deform even when it is subjected to a drop impact or vibration, so that the concern that the bezel side plate portion 11a contacts a mounting component (not shown) of the X side wiring board 14 and is broken is eliminated. The In addition, since the X-side wiring board 14 is grounded not only to the rear frame 1 but also to the bezel 11 through the screws 17, the board supporting protrusions 1h, and the board holding recesses 11b, the grounding property is also improved. Further, the substrate support convex portion 1h and the substrate pressing concave portion 11b serve as a spacer, and the space between the X-side wiring substrate 14, the rear frame outer plate portion 1g, and the bezel side plate portion 11a is secured, so that the use of a spacer becomes unnecessary. Moreover, since the screw 17 used for fixing the conventional X-side wiring board can be used, the number of parts and the number of assembly steps are not increased.

  FIG. 6 is a partial side view of a liquid crystal module according to another embodiment of the present invention.

  In this liquid crystal module, two screw holes are formed side by side on the top surface portion of the substrate support convex portion of the rear frame 1, and correspondingly, the screw insertion holes 11b and 11b are formed as substrate holders for the bezel side plate portion 11a. The screw insertion hole is formed in the bottom end portion 11c of the concave portion 11b and the abutting side end portions of the two left and right X side wiring boards 14, 14, and the bezel side plate portion 1g is formed by the two screws 17, 17. The two X-side wiring boards 14 and 14 and the outer plate 1g of the rear frame 1 are fastened together. Since other configurations are the same as those of the liquid crystal module of the above-described embodiment, a duplicate description is omitted.

  In any of the liquid crystal modules of the above embodiment, the short bezel 12 and the Y-side wiring board (Y-PCB) 16 are not fastened to the outer plate portion of the lamp frame 6 with screws. Even if it receives a drop impact or the like, it is difficult to bend or deform. Therefore, even if it is not tightened with screws, there is almost no possibility that the bezel 12 will come into contact with the mounted component of the Y-side wiring board 16 and break down. Therefore, although it is not necessary to fasten the short bezel 12, it goes without saying that it can be fastened if necessary.

  Further, in the liquid crystal module of the above embodiment, the bezel 11, the X-side wiring board 14, and the outer plate 1g of the rear frame 1 are fastened and fixed at one place in the central portion in the length direction. Of course, it may be fixed together at a plurality of locations.

It is a disassembled perspective view of the liquid crystal module which concerns on one Embodiment of this invention. It is sectional drawing of the liquid crystal module. It is a rear view of the liquid crystal module. FIG. 4 is an enlarged view of a portion surrounded by a circle P in FIG. 3. It is a principal part disassembled perspective view of the liquid crystal module. It is a partial side view of the liquid crystal module which concerns on other embodiment of this invention.

Explanation of symbols

1 Rear frame 1e Side plate (double side plate)
1g Outer side of side plate (outer wall of double side plate)
1h Substrate support convex portion 1i Top surface portion 1j Screw hole 10 Liquid crystal cell 11, 12 Bezel 11a Bezel side plate portion 11b Substrate pressing concave portion 11c Bottom portion 11d Screw insertion hole 13, 15 COF
14 X side wiring board 17 Screw

Claims (5)

  An X-side wiring board connected to an edge portion along one long side of a liquid crystal cell having a rectangular planar shape via a COF is connected to a side plate along one long side of a rear frame having a rectangular planar shape. A gap is placed on the outer surface, the bezel is covered with a gap on the outside, both ends of the bezel are fixed to the rear frame, and the bezel and the X-side wiring board are screwed in at least one place other than both ends. A liquid crystal module characterized by being fastened and fixed to the side plate of the rear frame.   The liquid crystal module according to claim 1, wherein the joint fastening portion is a central portion in the length direction of the bezel.   In the above-mentioned joint fastening location, a substrate support convex portion that curves toward the X-side wiring substrate is formed on the side plate of the rear frame, and a substrate pressing concave portion that curves toward the X-side wiring substrate is formed on the bezel. The liquid crystal module according to claim 1, wherein the liquid crystal module is a liquid crystal module.   A screw hole for screwing a screw is formed in the top surface portion of the substrate support convex portion, and a screw insertion hole is formed in the bottom surface portion of the substrate holding recess and the X-side wiring board, and at least a screw on the bottom surface portion of the substrate holding recess. 4. The liquid crystal module according to claim 3, wherein the insertion hole is a long hole extending in the length direction of the bezel or in a direction perpendicular to the length.   Two screw holes are arranged in the length direction of the side plate of the rear frame and formed on the top surface portion of the substrate support convex portion, and two screw insertion holes are arranged in the length direction of the bezel to form the bottom surface portion of the substrate pressing concave portion. The liquid crystal module according to claim 4, wherein the liquid crystal module is formed on the X-side wiring board.

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