JP2010097080A - Flat panel display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat panel display device which is resistant against falling. <P>SOLUTION: The display device 100 includes: a display panel 10; a housing 12 where the display panel 10 is stored; a chassis 14 for holding the display panel 10 in a predetermined position in the housing 12; and a fitting metal 16 for fixing the chassis 14 to the housing 12. The fitting metal 16 includes a first fixing part 16a to which the chassis 14 is fixed, a second fixing part 16b fixed to the front part 12c of the housing 12 ahead of the first fixing part 16a, and an intermediate part 16c located between the first fixing part 16a and the second fixing part 16b. The intermediate part 16c is formed so that the first fixing part 16a may come close to the second fixing part 16b by bending at least one boundary selected out of a boundary between the first fixing part 16a and the intermediate part 16c and a boundary between the second fixing part 16b and the intermediate part 16c. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flat panel display device, and more particularly to a structure effective for preventing damage to a display panel during a fall.

  In recent years, flat panel display devices such as plasma display devices are rapidly spreading (Patent Document 1).

FIG. 10 shows the appearance of a plasma display device which is a kind of flat panel display device. FIG. 11 shows a YY cross section of FIG. The display device 200 includes a display panel 216 that displays an image, a housing 201 that houses the display panel 216, and a front protective glass 210 that closes an opening of the housing 201. The casing 201 includes a back casing 201a and a side casing 201b. The display panel 216 is fixed to the side housing 201b via the adhesive sheet 205, the chassis 204, and the mounting bracket 211. A dust-proof sponge 209 is provided between the front protective glass 210 and the display panel 216.
JP 2004-206076 A

  A flat panel display device has a drawback that it is easy to fall down because it has a smaller installation area and a higher center of gravity than a cathode ray tube display device. In particular, the damage when falling forward tends to be large, and the display panel may be damaged.

  Taking the plasma display device 200 described with reference to FIGS. 10 and 11 as an example, the chassis 204 supporting the display panel 216 is firmly fixed to the housing 201 by the mounting bracket 211. Therefore, the chassis 204 is deformed by an impact at the time of falling, and a large force is applied to the display panel 216 due to the deformation, resulting in breakage. The fact that heavy objects such as a power supply and a control circuit are arranged behind the chassis 204 is one of the causes of the display panel 216 being damaged.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a flat panel display device in which a display panel is hardly damaged even if it falls forward.

That is, the present invention
A display panel;
A housing including a front surface portion in which an opening for making an image displayed on the display panel visible is formed;
A chassis that supports the display panel from the rear side and plays a role of holding the display panel in a predetermined position in the housing;
A member for fixing the chassis to the housing, the first fixing portion to which the outer peripheral portion of the chassis is fixed, and the front portion of the housing in front of the first fixing portion. A second fixing portion and an intermediate portion between the first fixing portion and the second fixing portion, the intermediate portion, a boundary between the first fixing portion and the intermediate portion, and the second fixing portion. And an attachment member formed such that the first fixing portion approaches the second fixing portion by bending at least one location selected from the boundary between the intermediate portion and the intermediate portion;
A flat panel display device is provided.

  According to the display device of the present invention, when the vehicle falls forward, it is selected from (i) the intermediate portion, (ii) the boundary between the first fixed portion and the intermediate portion, and (iii) the boundary between the second fixed portion and the intermediate portion. When the attachment member is bent at at least one location, the first fixing portion approaches the second fixing portion. That is, the impact of falling is absorbed by the specific part of the attachment member being bent preferentially. Thereby, a deformation | transformation of the chassis fixed to the 1st fixing | fixed part can be suppressed. By suppressing the deformation of the chassis, the display panel can be prevented from being damaged.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a partial cross-sectional view of a flat panel display device according to a first embodiment of the present invention, and is a cross-sectional view similar to FIG. 11 referred to in the description of the background art.

  The display device 100 includes a display panel 10 that displays an image, a housing 12 that houses the display panel 10, a chassis 14 that plays a role of holding the display panel 10 at a predetermined position in the housing 12, and a chassis 14 A mounting bracket 16 that is a member for fixing the display panel 10 to the housing 12 and a front protective glass 18 disposed on the front side of the display panel 10 are provided. The user can visually recognize the video displayed on the display panel 10 through the front protective glass 18.

  In this specification, “front side”, “rear side”, “width direction”, and “height direction” conform to the definition of the general direction of the display device. That is, the side with the screen is the “front side” and the opposite side is the “rear side”. The horizontal direction in the usage state of the display device is the “width direction”, and the direction perpendicular to the width direction and the front-rear direction is the “height direction”.

  The display panel 10 may be a plasma display panel including a front glass substrate 6, a back glass substrate 7, and a discharge space PS formed between the front glass substrate 6 and the back glass substrate 7. That is, the display device 100 of the present embodiment is a plasma display device. Since the structure in which the display panel is supported by the chassis is widely adopted in the plasma display device, it is effective in that the present invention can be adopted without any major design change.

  The rear glass substrate 7 is provided with elements such as a discharge electrode, a dielectric, and a fluorescent material. The front glass substrate 6 is provided with elements such as a counter electrode. The front glass substrate 6 and the rear glass 7 substrate are combined so as to be parallel to each other. The discharge space PS is filled with an inert gas such as neon gas. A sealing material 8 is filled between the substrates 6 and 7 so as to surround the discharge space PS.

  The type of the display device is not particularly limited, and the present invention may be applied to other display devices such as a liquid crystal display device and a field emission display device.

  A buffer material 20 is provided between the display panel 10 and the front protective glass 18. The buffer material 20 is made of a material capable of absorbing shock, such as rubber or foamed resin. The buffer material 20 can prevent the display panel 10 and the front protective glass 18 from directly contacting and breaking. The buffer material 20 is provided at 360 ° around the display panel 10 and prevents dust from entering the space between the display panel 10 and the front protective glass 18. Further, an adhesive sheet (not shown) for bonding the two together is disposed between the display panel 10 and the chassis 14.

  The materials of the chassis 14, the mounting bracket 16, and the housing 12 are not particularly limited. Metal materials such as stainless steel, aluminum alloy, and magnesium alloy can be used as materials for the chassis 14, the mounting bracket 16, and the housing 12. An aluminum alloy having a high heat dissipation effect is suitable for the chassis 14. The mounting bracket 16 is typically made of stainless steel having excellent formability. A magnesium alloy that is lightweight but has high strength is suitable for the housing 12. Part or all of the housing 12 may be made of a plastic material such as FRP (fiber-reinforced plastic).

  The housing 12 includes a back surface portion 12a, a side surface portion 12b, and a front surface portion 12c. The back surface portion 12a is composed of one component, and the side surface portion 12b and the front surface portion 12c are composed of another one component. An opening 121 for making an image displayed on the display panel 10 visible is formed in the front surface portion 12c. The side surface portion 12b is a portion extending rearward from the front surface portion 12c. Parts constituting the side surface portion 12b and the front surface portion 12c have a frame shape. The opening 121 is closed by the front protective glass 18 from the inside.

  The chassis 14 includes a panel support portion 141 and an outer peripheral portion 147. The panel support part 141 is a part that supports the display panel 10 from the rear side. The outer peripheral portion 147 is a portion extending obliquely forward from the peripheral edge of the panel support portion 141. That is, the chassis 14 is formed so that the front side is concave. Heavy objects such as a power source and a control circuit are arranged behind the chassis 14 (not shown).

  As shown in FIG. 2, the panel support part 141 of the chassis 14 has a square shape. The display panel 10 is arranged in a region 10e surrounded by a broken line. A plurality of screw holes 14 h for screwing the outer peripheral portion 147 to the mounting bracket 16 are formed along the longitudinal direction of the outer peripheral portion 147. The interval between the adjacent screw holes 147h and the screw holes 147h may be constant or may vary depending on the location. Cutouts 14 c are formed at the four corners of the chassis 14. Based on these notches 14c, outer peripheral portions 147 in the shape of flaps are formed corresponding to the four sides of the panel support portion 141, respectively.

  As shown in FIG. 1, the mounting bracket 16 is arranged around the display panel 10 and is provided corresponding to each of the four sides of the chassis 14 or has a frame shape. Specifically, the mounting bracket 16 includes a first fixing portion 16a to which the chassis 14 is fixed, a second fixing portion 16b that is fixed to the housing 12 in front of the first fixing portion 16a, and a first fixing portion 16a. And an intermediate portion 16c between the second fixing portion 16b. The first fixing portion 16a and the second fixing portion 16b face each other in the front-rear direction. The outer peripheral portion 147 of the chassis 14 is fixed to the first fixing portion 16 a with screws 22. Similarly, the second fixing portion 16 b of the mounting bracket 16 is fixed to the front surface portion 12 c of the housing 12 with screws 24. In the present embodiment, screwing between the mounting bracket 16 and the housing 12 is limited to screwing between the second fixing portion 16b and the front surface portion 12c.

  According to the mounting bracket 16 as described above, the first fixing portion 16a can approach the second fixing portion 16b by bending the intermediate portion 16c with priority. That is, when the display device 100 falls forward, the intermediate portion 16c of the mounting bracket 16 is bent to absorb the impact. The first fixing portion 16a of the mounting bracket 16 is displaced forward while the chassis 14 is fixed. As a result, deformation (deflection) of the chassis 14 is suppressed, and damage to the display panel 10 can be prevented.

  The first fixing portion 16 a and the second fixing portion 16 b of the mounting bracket 16 each have a plate shape parallel to the display panel 10. The outer peripheral portion of the front protective glass 18 is sandwiched between the second fixing portion 16 b of the mounting bracket 16 and the front surface portion 12 c of the housing 12. In a cross-sectional view perpendicular to any of the four sides of the display panel 10 (for example, FIG. 1), the intermediate portion 16c of the mounting bracket 16 has a V shape. That is, the intermediate portion 16c includes a bent portion 161 that is bent in advance. The bent portion 161 is a portion for allowing the intermediate portion 16c to bend with priority.

Precisely, the mounting bracket 16 is bent at three locations in advance. First, the bending portion 161 included in the intermediate portion 16c has an acute bending angle θ ₁ . Next, the angle formed between the first fixed portion 16a and the intermediate portion 16c is an obtuse angle, and the angle formed between the second fixed portion 16b and the intermediate portion 16c is an obtuse angle. The angle formed between the first fixed portion 16a and the intermediate portion 16c and the angle formed between the second fixed portion 16b and the intermediate portion 16c may be the same or different.

According to the mounting bracket 16 as described above, a bent portion having an acute bending angle θ ₁ is easily bent. That is, when the display device 100 falls, the intermediate portion 16c bends (deforms) so that the bending angle θ ₁ of the bent portion 161 becomes small, or the intermediate portion 16c bends (deforms) so that the bent portion 161 is sharp. ). In some cases, deformation occurs at the boundary between the first fixed portion 16a and the intermediate portion 16c and at the boundary between the second fixed portion 16b and the intermediate portion 16c. The “boundary” means to include the vicinity of the boundary. The same applies to other embodiments.

  It should be noted that a mounting bracket having an acute bending angle can also be employed at all bending locations. For example, the mounting bracket 19 shown in FIG. 3 has an acute angle between the first fixing portion 19a and the intermediate portion 19c and an angle between the second fixing portion 19b and the intermediate portion 19c. Further, the intermediate portion 19c itself is also bent at an acute angle (bent in a V shape). Thus, the same effect as described above can be obtained by the mounting bracket 19 having a Σ-shaped cross section.

  FIG. 1 shows a screw 22 for fixing the chassis 14 to the mounting bracket 16 and a screw 24 for fixing the mounting bracket 16 to the housing 12. The positions of the screws are appropriately changed in consideration of assembly. May be. For example, if the positions of screwing between the chassis 14 and the mounting bracket 16 and the positions of screwing between the mounting bracket 16 and the housing 12 are staggered in plan view, the screwing operation is easy.

(Second Embodiment)
FIG. 4 is a partial cross-sectional view of a flat panel display device according to a second embodiment of the present invention. The display device 102 of the present embodiment includes a mounting bracket 26 different from that of the first embodiment. The parts using the same reference numerals are common.

The mounting bracket 26 includes a first fixing portion 26a to which the chassis 14 is fixed, a second fixing portion 26b that is fixed to the housing 12 in front of the first fixing portion 26a, and a first fixing portion 26a and a second fixing portion. And an intermediate portion 26c between the portion 26b. Each of the first fixing part 26 a and the second fixing part 26 b has a plate shape parallel to the display panel 10. The mounting bracket 26 is bent in advance so that the angle θ ₂ formed between the first fixed portion 26a and the intermediate portion 26c is an obtuse angle, and the angle θ ₃ formed between the second fixed portion 26b and the intermediate portion 26c is an acute angle.

  Thus, in this embodiment, the mounting bracket 26 is bent in advance at two locations. According to the mounting bracket 26, it is easy to bend at the boundary between the second fixed portion 26b and the intermediate portion 26c. In some cases, the intermediate portion 26c itself also bends.

  The display device 102 further includes a structure 30 (hereinafter referred to as a slide structure 30) that allows the second fixing portion 26b to slide in the height direction or the width direction (the width direction in FIG. 1).

  According to the mounting bracket 16 (see FIG. 1) described in the first embodiment, it is not always determined which portion of the intermediate portion 16c is bent. Therefore, although the effect of suppressing the deformation of the chassis 14 by absorbing the impact at the time of falling can be obtained, the mounting bracket 16 serves as a spring even in normal times, and the positioning of the display panel 10 may become unstable. .

  On the other hand, in this embodiment, the bending location of the mounting bracket 26 is limited to 2 locations to increase the rigidity. By providing the slide structure 30, the mounting bracket 26 is easily bent at the boundary between the second fixing portion 26b and the intermediate portion 26c. As a result, the stability of the positioning of the display panel 10 at the normal time is increased, and the effect of suppressing the deformation of the chassis 14 at the time of the fall is also reliably obtained.

  The slide structure 30 includes a second fixing portion 26b of the mounting bracket 26, a screw hole 26h formed in the second fixing portion 26b, a screw hole 12h formed in the front surface portion 12c of the housing 12, and the screw holes 26h. , 12h, and a screw 24 that fastens the second fixing portion 26b of the mounting bracket 26 and the front surface portion 12c of the housing 12. Instead of the screws 24, other fastening members such as bolts may be used.

The screw hole 12 h formed in the front surface portion 12 c of the housing 12 is a circular hole having a hole diameter equal to the outer diameter of the shaft portion 24 j of the screw 24. On the other hand, as shown in FIG. 6, the screw hole 26 h formed in the second fixing portion 26 b of the mounting bracket 26 has an outer diameter of the shaft portion 24 j of the screw 24 in the width direction (or height direction) of the display device 102. It is a long hole having a dimension D ₁ longer than φ. That is, the screw hole 26 h has an elongated shape in the width direction (or height direction) of the display device 102. The screw 24 fastens the mounting bracket 26 and the housing 12 at the outermost position in the screw hole 26h. As the screw 24 moves in the screw hole 26h, the second fixing portion 26b of the mounting bracket 26 slides with respect to the front surface portion 12c of the housing 12.

Since the hole diameter of the screw hole 12h of the housing 12 is equal to the diameter φ of the screw 24, the positional relationship between the screw 24 and the housing 12 does not change. On the other hand, since the screw hole 26h of the mounting bracket 26 is a long hole, the second fixing portion of the mounting bracket 26 is moved by moving the screw 24 through the screw hole 26h, as shown in FIGS. 26b slides outward. The buffer material 20 contracts, and the first fixing portion 26a approaches the second fixing portion 26b. The second fixing portion 26b and the intermediate portion 26c are formed so that the angle θ ₂ formed by the first fixing portion 26a and the intermediate portion 26c is increased and the angle θ ₃ formed by the second fixing portion 26b and the intermediate portion 26c is decreased. The mounting bracket 26 bends at the boundary. It is possible to prevent the panel support portion 141 of the chassis 14 from being deformed by bending the mounting bracket 26 in this way.

  Since the screw 24 is located on the outermost side of the screw hole 26h, the mounting bracket 26 is normally firmly screwed to the housing 12 so that the second fixing portion 26b does not slide unless a relatively strong impact is applied. The mounting bracket 26 also does not bend. The slide structure 30 works effectively only when an impact large enough to exceed the restraining force by screwing is applied. Such a slide structure 30 may be provided only on both sides in the width direction with the display panel 10 interposed therebetween, or may be provided only on both sides in the height direction. Since the longitudinal direction of the display panel 10 coincides with the width direction, if the slide structures 30 are provided on both sides of the width direction, the effect of suppressing deformation (deflection) of the chassis 14 is high.

  Moreover, the slide structure 30 may be provided corresponding to each of the four sides of the display panel 10. By doing so, the mounting bracket 26 is bent evenly corresponding to each of the four sides of the display panel 10, and the effect of suppressing deformation (deflection) of the chassis 14 is further enhanced.

  However, the present invention does not exclude an aspect in which the slide structure 30 is provided only on one side in the width direction or is provided only on one side in the height direction. For example, as shown in FIG. 7, the slide structures 30 may be provided on both sides in the width direction with the display panel 10 interposed therebetween, and the slide structures 30 may be provided only on the lower side in the height direction. Moreover, the shape of the screw hole which comprises the slide structure 30 is not limited to a long hole if the target effect is acquired. In the example of FIG. 7, a screw hole 261 h whose width becomes narrower toward the outside is formed in the second fixing portion 26 b of the mounting bracket 26. The screw hole 261h has a substantially triangular shape in plan view. The shaft portion 24j of the screw 24 is located on the outermost side of the screw hole 261h.

  As shown in FIG. 8, the chassis 14 may be supported by a column 410 in addition to being fixed to the housing 12 by the mounting bracket 26. The column 410 is fastened to the chassis 14 by a fastening member such as a screw, and supports the lower portion of the chassis 14 from the rear side. When the display apparatus 102 falls forward, the weight of the column 410 is directly applied to the chassis 14. Therefore, the lower part of the chassis 14 is the part that is most likely to be deformed. As described with reference to FIG. 7, when the slide structure 30 is provided on the lower side in the height direction, the deformation of the lower portion of the chassis 14 due to the weight of the support column 410 can be suppressed pinpointed, and the display panel 10 The effect of preventing damage is extremely high.

  In addition, you may provide the slide structure 30 in this embodiment in the display apparatus 100 of 1st Embodiment. By providing the slide structure 30 in the display device 100 according to the first embodiment, the intermediate portion 16c (, 19c) can bend preferentially at the time of falling.

(Third embodiment)
FIG. 9 is a partial cross-sectional view of a flat panel display device according to a third embodiment of the present invention.

The display device 104 includes a mounting bracket 36 similar to that of the second embodiment. The mounting bracket 36 is bent in advance at two locations so that the angle θ ₄ formed between the first fixed portion 36a and the intermediate portion 36c is an acute angle, and the angle θ ₅ formed between the second fixed portion 36b and the intermediate portion 36c is an obtuse angle. Yes. The mounting bracket 36 is easily bent at the boundary between the first fixed portion 36a and the intermediate portion 36c. In some cases, the intermediate portion 36c itself bends.

  The display device 104 further includes a slide structure 31 similar to that of the second embodiment. By providing the slide structure 31, the mounting bracket 36 is easily bent at the boundary between the first fixed portion 36a and the intermediate portion 36c. As a result, the stability of the positioning of the display panel 10 at the normal time is increased, and the effect of suppressing the deformation of the chassis 14 at the time of the fall is also reliably obtained.

In the slide structure 31 shown in FIG. 9, the screw 24 for fixing the second fixing portion 36b and the housing 12 is located on the innermost side of the screw hole 36h formed in the second fixing portion 36b. Simply put, it is the opposite of the second embodiment. As the screw 24 moves in the screw hole 36h, the second fixing portion 36b of the mounting bracket 36 slides inward. The buffer material 20 contracts, and the first fixing portion 36a approaches the second fixing portion 36b. The first fixed portion 36a and the intermediate portion 36c are configured such that the angle θ ₄ formed by the first fixed portion 36a and the intermediate portion 36c is reduced and the angle θ ₅ formed by the second fixed portion 36b and the intermediate portion 36c is increased. The mounting bracket 36 bends at the boundary. It is possible to prevent the panel support portion 141 of the chassis 14 from being deformed by bending the mounting bracket 36 in this way.

The partial cross-sectional view of the flat panel display apparatus concerning 1st Embodiment Chassis top view Cross-sectional view of a mounting bracket according to a modification Partial cross-sectional view of flat panel display device according to second embodiment Partial cross-sectional view showing the bent state of the mounting bracket Action diagram of slide structure Schematic diagram showing the layout of the slide structure Side schematic diagram showing the support that supports the chassis Partial cross-sectional view of a flat panel display device according to a third embodiment External view of flat panel display device YY sectional view of FIG.

Explanation of symbols

6 Front glass substrate 7 Rear glass substrate 7p Main surface 10 Display panel 12 Housing 12c Front portion 14 Chassis 16, 19, 26, 36 Mounting brackets 16a, 19a, 26a, 36a First fixing portions 16b, 19b, 26b, 36b First 2 fixed portions 16c, 19c, 26c, 36c intermediate portions 30, 31 slide structures 26h, 261h, 36h screw holes 100, 102, 104 display device 121 opening PS discharge space

Claims (8)

A display panel;
A housing including a front surface portion in which an opening for enabling visual recognition of an image displayed on the display panel is formed;
A chassis that supports the display panel from the rear side and plays a role of holding the display panel in a predetermined position in the housing;
A member for fixing the chassis to the housing, the first fixing portion to which the outer peripheral portion of the chassis is fixed, and the front portion of the housing in front of the first fixing portion. A second fixing portion and an intermediate portion between the first fixing portion and the second fixing portion, the intermediate portion, a boundary between the first fixing portion and the intermediate portion, and the second fixing portion. And an attachment member formed so that the first fixing portion approaches the second fixing portion by bending at least one place selected from the boundary between the intermediate portion and the intermediate portion;
A flat panel display device.   The flat panel display device according to claim 1, wherein the intermediate portion includes a bent portion that is bent in advance.   The flat panel display device according to claim 2, wherein the bent portion has an acute bending angle. The first and second fixing portions each have a plate shape parallel to the display panel;
The first fixing part and the second fixing part are opposed to each other in the front-rear direction;
The mounting member is bent in advance so that an angle formed between the first fixed portion and the intermediate portion is an obtuse angle and an angle formed between the second fixed portion and the intermediate portion is an acute angle. Flat panel display device. The first and second fixing portions each have a plate shape parallel to the display panel;
The first fixing part and the second fixing part are opposed to each other in the front-rear direction;
The mounting member is bent in advance so that an angle formed between the first fixed portion and the intermediate portion is an acute angle and an angle formed between the second fixed portion and the intermediate portion is an obtuse angle. Flat panel display device.   The flat panel display device according to claim 1, further comprising a structure that allows the second fixing portion to slide in a height direction or a width direction of the display device. The structure includes the second fixing portion of the mounting member, a hole formed in the second fixing portion, a hole formed in the front surface portion of the housing, and the mounting member inserted into the hole. A fastening member such as a screw that fastens the second fixing portion and the front portion of the housing;
The hole formed in the second fixing portion of the attachment member has a dimension longer than the outer diameter of the shaft portion of the fastening member as a dimension related to the height direction or the width direction of the display device,
The flat panel display device according to claim 6, wherein the fastening member is located on the outermost side or the innermost side of the hole formed in the second fixing portion with respect to the height direction or the width direction. 8. The plasma display panel according to claim 1, wherein the display panel includes a front glass substrate, a rear glass substrate, and a discharge space formed between the front glass substrate and the rear glass substrate. 2. A flat panel display device according to item 1.

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