JP2010271662A - Liquid crystal module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal module that keeps decent appearance by preventing rust generated in a punching end face at the tip of a side edge of a bezel component member from being seen, reduces the material cost and weight by improving strength of the side edge of the bezel component member and reducing the thickness of a sheet metal, and prevents the accident that a burr in punching the sheet metal formed at the tip of the side edge of the bezel component member damages a cell of a liquid crystal panel or hurts a fingertip. <P>SOLUTION: In this liquid crystal module, four peripheral edges of the liquid crystal panel 8 are surrounded with a bezel 9 where the bezel component members 91 and 92 made of a sheet metal are interconnected in a rectangular frame shape. The side edge 9c of each bezel component member 91 (92) on the inner peripheral side of the bezel is folded to the rear side, thereby forming a double side edge 9d. Preferably, the tip of the side edge 9c is positioned on the upside of an end 8a having no cell and a small thickness at four peripheral edges of the liquid crystal panel 8, and the burr in punching the sheet metal is formed upward at the tip of the side edge 9c. <P>COPYRIGHT: (C)2011,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 which reinforces the inner peripheral edge (opening edge) of a sheet metal bezel and improves the quality of end face processing.

  Conventionally, as a direct light type liquid crystal module, a light reflecting sheet and a light source are provided inside a sheet metal rear frame, an optical sheet is arranged above it, and the cell guide guides the four edges of the optical sheet. It is known that the four peripheral edges of a liquid crystal panel are placed on top of each other and the four peripheral edges of the liquid crystal panel are surrounded by a bezel in which sheet metal bezel constituent members are connected in a rectangular frame shape.

  As shown in FIG. 6, such a liquid crystal module is formed by drawing a side edge portion 109b of a bezel constituent member 109a on the inner peripheral side (opening side) of the bezel 109 surrounding the four peripheral edges of the liquid crystal panel 8 in a step shape. Even when an external force is applied, the side edge portion 109b of the bezel constituent member 109a is strengthened so as not to be distorted or bent.

  In addition, as a side-light type liquid crystal display device, an illumination unit (a reflection sheet, a light guide plate, and an optical sheet is laminated and a light source is arranged on the side of the light guide plate) is housed in a housing (rear frame), In addition, the liquid crystal panel is fitted into the intermediate frame by pressing the side edge of the optical sheet, and the four peripheral edges of the liquid crystal panel are covered with a rectangular outer frame (bezel) having four frame sides ( For example, in Patent Document 1), the liquid crystal display device also has strength by drawing the inner peripheral edge of the outer frame (bezel), that is, the side edge on the inner peripheral side of the four frame sides in a step shape. It is

JP 2005-283866 A

  However, like the above-described direct light type liquid crystal module and the side light type liquid crystal display device of Patent Document 1, the bezel constituent member (frame side) 109a that is the inner peripheral side of the sheet metal bezel (outer frame) 109 is provided. When the side edge 109b is drawn into a stepped shape to give strength, rust generated on the punched end surface of the side edge 109b of the bezel component 109a is seen from the front when the liquid crystal module (liquid crystal display device) is viewed. There was a problem that it was conspicuous and the appearance was damaged.

  Further, as shown in FIG. 7, the punch 109c (claw-shaped convex portion) at the time of punching the sheet metal is directed downward depending on the punching direction on the punching end surface at the tip of the side edge 109b subjected to the drawing processing of the bezel constituent member 109a. However, if the downward burrs 109c are formed as shown in the drawing, the cells of the four peripheral edges of the liquid crystal panel 8 may be damaged by the downward burrs 109c. When the upward burrs are formed, there is a risk of injury to the fingertip when assembling the bezel or handling the liquid crystal module.

  Further, in the above-described direct light type liquid crystal module and the side light type liquid crystal display device of Patent Document 1, the side edge portion 109b of the bezel constituent member (frame side) 109a is drawn into a step shape to improve the strength. However, it has been difficult to reduce the thickness of the sheet metal, thereby reducing the material cost and weight.

  The present invention has been made under the above circumstances, and the problem to be solved is that it is possible to maintain a good appearance because the rust generated on the punched end surface of the side edge of the bezel component member is not visible. In addition, it is possible to reduce the material cost by reducing the thickness of the sheet metal at the same time as the strength of the side edge of the bezel constituent member, thereby reducing the material cost, and at the time of punching the sheet metal formed at the end of the side edge of the bezel constituent member. An object of the present invention is to provide a liquid crystal module that does not cause damage to the cells of the liquid crystal panel or injury of the fingertips due to burrs.

  In order to solve the above-described problems, a liquid crystal module according to the present invention is a liquid crystal module in which four peripheral edges of a liquid crystal panel are surrounded by a bezel in which sheet metal bezel constituent members are connected in a rectangular frame shape. A double side edge portion is formed by folding the side edge portions of the respective bezel constituent members on the circumferential side back to the back side.

  In the liquid crystal module of the present invention, the tip of the side edge portion folded back to the back side of the bezel constituent member is positioned above the small edge portion where the cells on the four peripheral edges of the liquid crystal panel are not formed. Is desirable.

  Further, it is desirable that a burr at the time of punching the sheet metal is formed upward at the tip of the side edge portion folded back to the back side of the bezel constituent member.

  In addition, it is desirable that the double side edge portion of the bezel constituent member is positioned inside the liquid crystal panel positioning protrusion formed on the upper surface of the cell guide that supports the liquid crystal panel.

  As in the liquid crystal module of the present invention, when the side edges of the respective bezel constituent members on the inner peripheral side of the bezel are folded back to form the double side edges, the thickness of the double side edges becomes the bezel configuration. The strength is greatly improved because it is twice the thickness of the sheet metal of the member, and even if the thickness of the sheet metal is reduced to some extent, the strength of the double side edge of the bezel component is the conventional drawn bezel structure Even if an external force is applied, the double side edge of the bezel constituent member is not distorted or bent. Accordingly, it is possible to achieve a reduction in material cost and a reduction in the weight of the bezel as much as the thickness of the sheet metal can be reduced. In addition, when the side edge of the bezel component is folded back like the liquid crystal module of the present invention, rust generated on the punched end surface of the side edge is caused when the liquid crystal module is viewed from the front. Since it is hidden behind the back and cannot be seen at all, a good appearance can be maintained.

  Also, if the tip of the side edge that is folded back to the back side of the bezel component is located above the small edge where the four peripheral cells of the liquid crystal panel are not formed, the tip of the side edge Even when the burrs at the time of punching the sheet metal are formed downward, the worry that the burrs hit the cells and damage the cells is solved. In particular, if burrs are formed upward at the tip of the side edge, in addition to preventing cell damage due to burrs, the risk of injury to the fingertips caused by burrs when assembling bezel components is eliminated. Become.

  Further, when the double side edge portion of the bezel constituent member is located inside the liquid crystal panel positioning protrusion formed on the upper surface of the cell guide that supports the liquid crystal panel, the side folded back to the back side of the bezel constituent member Since the liquid crystal panel positioning protrusions can be formed higher by the thickness of the edge metal plate, the liquid crystal panel is less likely to be detached from the positioning protrusions, and the liquid crystal panel can be positioned more reliably.

It is a disassembled perspective view of the liquid crystal module which concerns on one Embodiment of this invention. It is a front view of the liquid crystal module. It is a fragmentary sectional view along the AA line of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is a disassembled front view of the bezel of the liquid crystal module. It is a fragmentary sectional view of the conventional liquid crystal module. It is the elements on larger scale of FIG.

  The liquid crystal module of the embodiment shown in FIGS. 1 to 3 includes a rear frame 1, a light reflecting sheet 2, a U-shaped cold cathode tube 3, a lamp holder 4, a lamp frame 5, optical sheets 6a and 6b, a cell guide 7, The liquid crystal panel 8 and the bezel constituent members 91, 91, 92, and 92 are assembled by main constituent parts such as a bezel 9 in which a rectangular frame is connected.

  The rear frame 1 is a shallow box-shaped frame made of sheet metal, and a light reflecting sheet 2 bent in an inverted trapezoidal shape is provided therein. A plurality (two in this embodiment) of U-shaped cold cathode tubes 3 are arranged in parallel on the light reflecting sheet 2, and the U-shaped bent ends of the respective cold cathode tubes 3. The portion is held by the lamp holder 4 and fixed to the bottom plate 1 a of the rear frame 1.

  A rubber lamp socket 3 a is attached to the end of the cold cathode tube 3 opposite to the U-shaped bent end, and the lamp socket 3 a extends along the side plate 1 b on one short side of the rear frame 1. The lead frame 3b is drawn out behind the rear frame 1 by being fitted into a socket fitting opening 1c formed in the bottom plate 1a of the rear frame 1. Then, lamp frames 5 and 5 made of synthetic resin are attached inside the side plates 1b and 1d of the opposite short sides of the rear frame 1, and the lamp socket 3a is attached by these lamp frames 5 and 5. The end of the U-shaped cold cathode tube 3 and the U-shaped bent end held by the lamp holder 4 on the opposite side are covered.

  As shown in FIGS. 1 and 3, 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. The upper surface of the double side plates 1e and 1f On the upper surfaces of the lamp frames 5 and 5, the four peripheral edges of the two optical sheets 6a and 6b are placed. These optical sheets are light diffusion sheets that diffuse the direct light from the U-shaped cold cathode tube 3 and the reflected light reflected by the light reflecting sheet 2 to uniformly illuminate the liquid crystal panel 8 from the back, and The optical sheet 6b is a thin light diffusion sheet, but the lower optical sheet 6a is a thick light diffusion sheet (light diffusion plate) that is difficult to bend.

  The four peripheral edges of these optical sheets 6a and 6b are L-shaped made of two synthetic resins attached in a square frame shape on the double side plates 1e and 1f of the rear frame 1 and the lamp frames 5 and 5, respectively. The cell guides 7 and 7 hold the four peripheral edges of the liquid crystal panel 8 on the cell guides 7 and 7. As shown in FIG. 1, liquid crystal panel positioning projections 7a are formed on the upper surfaces of the cell guides 7 and 7 near both ends and near the corners, respectively. As shown in FIG. The protrusions 7a are positioned so as not to protrude outside the cell guides 7 and 7.

  Further, as shown in FIG. 1, pins 7b for bezel positioning project from both end portions and corner portions of one cell guide 7, and bezel positioning pins are also provided at the corner portion of the other cell guide 7. A pin 7b is projected. And by inserting the pin 7b of the both ends of one cell guide 7 from below into the pin insertion hole formed in the both ends of the other cell guide 7, both cell guides 7 and 7 are as above-mentioned. In this state, the bezel positioning pins 7b protrude upward from the four corners. Although not shown in FIG. 1, positioning pins protruding downward are also provided at the four corners of the cell guides 7, 7 combined in a rectangular frame shape. The cell guides 7 and 7 are positioned so as not to protrude from the rear frame 1 by being inserted into the positioning holes at both ends of the side plates 1e and 1f.

  As described above, the liquid crystal panel 8 positioned on the cell guides 7 and 7 positioned by the liquid crystal panel positioning projections 7a is surrounded by a rectangular frame-shaped bezel 9 as shown in FIG. . This bezel 9 is formed by connecting two long bezel constituent members 91, 91 made of sheet metal and two short bezel constituent members 92, 92 in a rectangular frame shape. As shown in FIG. At both ends of the member 91, substantially semicircular recesses 9a, 9a are formed, and approximately semicircular joining pieces 9b, 9b are projected from the bottom surface of the recess. A round hole and a long hole are formed in the bottom surface of the recess 9a and the joining piece 9b. Correspondingly, substantially semicircular recesses 9a, 9a and joining pieces 9b, 9b are also provided on both side edges of the short bezel component 92, and round holes are formed in the bottom surface of the recess 9a and the joining piece 9b. And a long hole is formed.

  The bezel 9 is assembled by overlapping the four bezel constituent members 91, 91, 92, and the four bezel constituent members 91, 91, 92, with the joint piece 9 b and the concave portion 9 a of the short bezel constituent member 92 superimposed on the concave portion 9 a and the joint piece 9 b of the long bezel constituent member 91. 92 is combined into a square frame shape, and the bezel positioning pins 7b at the four corners of the cell guides 7 and 7 are formed from the bottom of the long hole of the joining piece 9b of the long bezel constituent member 91 and the round hole of the concave portion 9a of the short bezel constituent member 92. The four bezel constituent members are positioned and the screws 10 from above are inserted into the long holes of the joining pieces 9b of the short bezel constituent members 92, the round holes of the concave portions 9a of the long bezel constituent members 91, and the cell guides 7. The screws are inserted into the screw insertion holes and screwed into the screw holes 1g at both ends of the double side plates 1e and 1f of the rear frame 1, and the four bezel components 91, 91, 92 and 92 are connected in a rectangular frame shape and at the same time Being performed by fixedly attached to arm 1.

  As shown in FIGS. 2 to 5, the major feature of the bezel 9 is that the side edge portions 9 c of the bezel constituent members 91, 91, 92, 92 on the inner peripheral side of the bezel 9 are folded back 180 ° to the back side. Thus, the double side edge portion 9d is formed. And the front-end | tip of the side edge part 9c turned back to the back side of the bezel structural member 91 (92) is the upper side of the edge part 8a with small thickness in which the cell of the four peripheral edges of the liquid crystal panel 8 is not formed, as shown in FIG. At the tip of the side edge portion 9c, as shown in FIG. 4, a fray 9e (claw-shaped convex portion) when punching a sheet metal is formed upward. Further, the double side edge portion 9d of the bezel component 91 (92) is formed by a liquid crystal panel positioning projection 7a formed on the upper surface of the cell guide 7 that supports the liquid crystal panel 8, as shown in FIGS. Is also located inside.

  As described above, when the side edge portion 9c of the bezel constituent member 91 (92) is folded back to form the double side edge portion 9d, the thickness of the double side edge portion 9d becomes the bezel constituent member 91 ( The strength of the double side edge portion 9d of the bezel component 91 (92) can be increased even if the thickness of the sheet metal is reduced to some extent. Since it becomes equal to or greater than the side edge 109b of the drawn bezel constituent member 109a, the double side edge 9d of the bezel constituent member 91 (92) will not be distorted or bent even when an external force is applied. . Accordingly, it is possible to achieve a reduction in material cost and a reduction in the weight of the bezel as much as the thickness of the sheet metal can be reduced. Further, rust is eventually generated on the punched end surface of the side edge portion 9c, but the rust on the punched end surface is hidden behind the bezel component 91 (92) when the liquid crystal module is viewed from the front, and cannot be seen. , Can maintain a good appearance.

  Furthermore, as shown in FIG. 3, the tip of the side edge portion 9c folded back to the back side of the bezel constituent member 91 (92) is formed on the end portion 8a having a small thickness where the four peripheral cells of the liquid crystal panel 8 are not formed. If it is located on the upper side, the burrs 9e are formed at the four peripheral edges of the liquid crystal panel 8 regardless of whether the burrs 9e are formed upward or downward at the tip of the side edge 9c. The worry of hitting the cell and damaging the cell is eliminated. In particular, when the burrs 9e are formed upward at the tip of the side edge portion 9c as in this embodiment, in addition to preventing damage to the cells of the liquid crystal panel 8 by the burrs 9e, the bezel constituent members 91 and 92 When assembling a rectangular frame, it is possible to eliminate the risk of injury to the fingertips with the burrs 9e.

  When the double side edge portion 9d of the bezel constituent member 91 (92) is positioned inside the liquid crystal panel positioning projection 7a formed on the upper surface of the cell guide 7 that supports the liquid crystal panel 8, the bezel Since the liquid crystal panel positioning projection 7a can be formed higher by the thickness of the sheet metal of the side edge portion 9c folded back to the back side of the constituent member 91 (92), the liquid crystal panel 8 becomes more difficult to come off from the positioning projection 7a. The panel 8 can be positioned more reliably.

  An X-side wiring board is connected to the long side of the liquid crystal panel 8 via a COF on which a source driver IC chip is mounted, and the short side of the liquid crystal panel 8 is connected to a COF on which a gate driver IC chip is mounted. Y side wiring boards are connected, but these wiring boards are not shown.

  The present invention has been described above by exemplifying a direct light type liquid crystal module, but it goes without saying that the present invention is also applied to the above-described side light type liquid crystal module.

DESCRIPTION OF SYMBOLS 1 Rear frame 2 Light reflecting sheet 3 U-shaped cold-cathode tube 5 Lamp frame 6a, 6b Optical sheet 7 Cell guide 7a Projection for liquid crystal panel positioning 8 Liquid crystal panel 8a The thickness of the liquid crystal panel on which the four peripheral cells are not formed Small end portion 9 Bezel 9c Side edge portion folded back to back side of bezel constituent member 9d Double side edge portion of bezel constituent member 9e Kairi 91, 92 Bezel constituent member

Claims (4)

In a liquid crystal module that surrounds the four peripheral edges of a liquid crystal panel with a bezel in which sheet metal bezel components are connected in a rectangular frame shape,
A liquid crystal module, wherein a double side edge portion is formed by folding the side edge portion of each of the bezel constituent members on the inner peripheral side of the square frame bezel.   2. The tip of the side edge portion folded back to the back side of the bezel constituent member is located above the end portion having a small thickness where the cells on the four peripheral edges of the liquid crystal panel are not formed. Liquid crystal module according to.   3. The liquid crystal module according to claim 2, wherein a bur when punching a sheet metal is formed upward at a tip of a side edge portion folded back to the back side of the bezel constituent member.   2. The double side edge portion of the bezel constituent member is located inside a liquid crystal panel positioning protrusion formed on an upper surface of a cell guide that supports the liquid crystal panel. 4. The liquid crystal module according to any one of 3.

Images