JP2010243708A - Video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device such as a plasma display device hardly causing deterioration in image quality or breakage of a display panel due to external force or its self weight in installation using a stand. <P>SOLUTION: The video display device includes a PDP 10 wherein circumferential edge parts of a front face panel and a back face panel are joined by a sealing member, a metal chassis 45 joined to the back face panel of the PDP 10 by a joint member, a casing 48 covering the PDP10 and the metal chassis 45, and the stand 12. The metal chassis 45 and the stand 12 are fixed and supported by first supporting members 42a and 42d fixed to the metal chassis 45 and a second supporting member 43 fixed to the first supporting members 42a and 42d and fixed to the stand 12 while forming a space part 44 between the metal chassis 45 and the second supporting member 43. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a video display device provided with an installation stand such as a plasma display device.

  In recent years, a liquid crystal display device using a liquid crystal display panel and a plasma display device using a plasma display panel (hereinafter abbreviated as PDP) are attracting attention and are produced and sold in large quantities as video displays suitable for thin and large size. Is also expanding rapidly.

  The PDP is composed of a pair of glass substrates, a front plate and a back plate. In the front plate, a display electrode pair, a dielectric layer, a protective layer, and the like are formed on a front glass substrate. On the other hand, on the back plate, data electrodes, barrier ribs, phosphor layers and the like are formed on a back glass substrate. Oppositely arranged so that a minute discharge space is formed between the front plate and the back plate, the peripheral portions of the front glass substrate and the back glass substrate are sealed by a sealing member. The discharge space is filled with a discharge gas formed by mixing neon (Ne), xenon (Xe), and the like.

  A chassis member is attached to the back surface of the back plate of the PDP via a bonding member such as an adhesive heat conductive sheet or an adhesive. The chassis member supports and fixes the PDP, and is a substrate for mounting a circuit board on which a drive circuit for driving the PDP is mounted, and also has a function of efficiently radiating heat generated in the PDP. Further, the plasma display device is provided with a casing such as a front frame and a back cover for protecting the PDP and the circuit board, and a chassis member is fixed to the casing to constitute the plasma display device main body. . Further, in such a plasma display device main body, the chassis member is fixedly coupled to the stand, and the stand is placed on the device stand or the like for viewing.

  As described above, when the stand and the plasma display device main body are fixedly coupled, an external force may be applied to the peripheral portion of the plasma display device main body. In that case, since the stand is fixed to the device stand or the like, as a reaction, a load is applied to the chassis member of the video display device main body, and as a result, a load that deforms the PDP supported and fixed to the chassis member is applied. The As a result, distortion stress is generated in the PDP, which may cause deterioration of image quality and damage to the PDP.

  As a conventional technique for this, a reinforcement member is used to reinforce the holding portion, thereby distributing the load applied to the chassis member to reduce the load on the display panel and to suppress image quality deterioration and panel breakage. An example of a display device is disclosed in Patent Document 1.

JP 2005-338788 A

  However, in the conventional configuration, in order to cope with a case where a large external force is applied to the video display device, it is necessary to increase the size of the reinforcing member and increase the number of locations where the reinforcing member is disposed. Therefore, the holding mechanism of the display device is increased in size, the number of parts is increased, the structure is complicated, and there are problems in arrangement with the circuit board and other parts and problems in heat dissipation. In addition, problems remain in terms of production and cost.

  The present invention has been made to solve the above-described problems. Particularly, when the video display device is installed by a stand, the load applied to the display panel is reduced due to the external force or the stress caused by the weight of the video display device. An object of the present invention is to provide a video display device that suppresses image quality deterioration and display panel damage.

  In order to achieve the above object, an image display device of the present invention includes a display panel, a chassis member joined to the back surface of the display panel by a joining member, a housing provided to cover the display panel and the chassis member, A first support member fixed to the chassis member, a second support member fixed to the first support member so as to provide a space between the chassis member, and a stand fixed to the second support member. I have.

  With such a configuration, a space is provided between the chassis member and the second support member, and the load transmitted from the stand to the chassis member with respect to the load caused by the external force or the weight of the display device is the first support member. And the second support member, the load applied to the display panel is reduced, and a video display device that is unlikely to cause deterioration in image quality or damage to the display panel can be realized.

  In addition, a first fixing portion that couples and fixes the chassis member and the first support member, a second fixing portion that couples and fixes the first support member and the second support member, and a second support member and the stand that are coupled and fixed. It is desirable that at least the positions of the first fixing portion and the third fixing portion are different in the positions projected onto the chassis member when viewed from the back side of the chassis member. According to such a configuration, the load transmitted from the stand to the chassis member is not directly transmitted from the stand to the chassis member because the positions of the respective fixing portions are different, thereby reducing the load on the display panel. In addition, the effect of preventing image quality deterioration and display panel damage can be further enhanced.

  Furthermore, it is desirable that the first fixing portion is disposed outside the second fixing portion, and the second fixing portion is disposed outside the third fixing portion. According to such a configuration, the load transmitted from the stand to the chassis member is transmitted while being diffused outward, further reducing the load on the display panel and preventing image quality deterioration and display panel damage. The effect to do can be further enhanced.

  Further, the chassis member has a long side and a short side, and the first support member includes a long side portion substantially parallel to the short side of the chassis member, and is targeted with respect to the central axis in the long side direction of the chassis member. It is desirable that at least two are arranged. According to such a configuration, it is possible to suppress deformation of the chassis member using the first support member as a reinforcing member of the chassis member, and to further reduce the load transmitted from the stand to the chassis member.

  According to the present invention, the load transmitted from the stand to the chassis member is absorbed with respect to the load caused by the external force or the weight of the image display device, the load applied to the display panel is reduced, the image quality is deteriorated, and the display panel is displayed. It is possible to realize a video display device that is less likely to be damaged.

1 is an exploded perspective view of a main part showing a basic configuration of a PDP used in a plasma display device which is a video display device in Embodiment 1 of the present invention. The perspective view which shows the external appearance of the plasma display apparatus Sectional drawing which shows the main structures inside the plasma display apparatus Rear view of the plasma display device Top view of the plasma display device The perspective view which shows the detail of the 1st support member used for the plasma display apparatus Sectional drawing which shows the main structures inside the modification of the plasma display apparatus Rear view of a modification of the plasma display device Top view of a modification of the plasma display device Sectional drawing which shows the main structures inside the plasma display apparatus in Embodiment 2 of this invention Rear view of the plasma display device Top view of the plasma display device The perspective view which shows the detail of the 1st support member used for the plasma display apparatus Sectional drawing which shows the main structures inside the modification of the plasma display apparatus

  Hereinafter, in the embodiment of the present invention, a plasma display device will be described as an example of a video display device with reference to the drawings.

(Embodiment 1)
FIG. 1 is an exploded perspective view of a main part showing a basic configuration of a PDP 10 used in a plasma display device 1 (hereinafter abbreviated as the present device 1) which is a video display device in Embodiment 1 of the present invention.

  As shown in FIG. 1, the PDP 10 includes a front plate 20 and a back plate 30. The front plate 20 has a front glass substrate 21, and a plurality of display electrode pairs 24 including scan electrodes 22 and sustain electrodes 23 arranged in parallel are formed on the front glass substrate 21. A dielectric layer 25 is formed so as to cover the scan electrode 22 and the sustain electrode 23, and a protective layer 26 is formed on the dielectric layer 25. The back plate 30 has a back glass substrate 31, and a plurality of data electrodes 32 arranged in parallel on the back glass substrate 31 are formed. A base dielectric layer 33 is formed so as to cover the data electrode 32, and a grid-like partition wall 34 is formed thereon. On the side surface of the partition wall 34 and the underlying dielectric layer 33, a phosphor layer 35 that emits light in red, green, and blue colors is provided for each data electrode 32 sequentially.

  The front plate 20 and the back plate 30 are arranged to face each other so that the display electrode pair 24 and the data electrode 32 cross each other with a minute discharge space interposed therebetween, and the outer peripheral portion thereof is a sealing member (not shown) such as a glass frit. Z). For example, a mixed gas such as neon (Ne) or xenon (Xe) is sealed in the discharge space as a discharge gas. In addition, the discharge space is partitioned into a plurality of sections by the barrier ribs 34, and discharge cells are formed at portions where the display electrode pairs 24 and the data electrodes 32 intersect. Then, discharge is performed in these discharge cells, and the phosphor layer 35 is excited by ultraviolet rays generated by the discharge to emit light, and a color image is displayed. Note that the structure of the PDP 10 is not limited to that described above, and for example, a structure having stripe-shaped partition walls may be used.

  Next, a holding structure when the apparatus 1 is installed on an apparatus stand or the like will be described with reference to FIGS. FIG. 2 is a perspective view showing the external appearance of the apparatus 1. As shown in FIG. 2, the apparatus 1 includes a main body 11 and a stand 12, and a PDP 10 is built in the main body 11. 3 is a cross-sectional view showing a main configuration inside the apparatus 1, FIG. 3 (a) is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 3 (b) is a part of FIG. 3 (a). It is an expanded sectional view which shows the structure of this in detail. 4 is a rear view of the apparatus 1 and FIG. 5 is a top view of the apparatus 1. In FIG. 5, only the metal chassis 45 of the main body 11 is shown to simplify the drawing. FIG. 6 is a perspective view showing details of the first support members 42a, 42b, 42c, and 42d that support and fix the apparatus 1, the main body 11, and the stand 12.

  As shown in FIG. 3, the present apparatus 1 is joined to the PDP 10 in which the peripheral portions of the front plate 20 and the back plate 30 are joined by the sealing member 40, and to the back plate 30 of the PDP 10 by a joining member (not shown). The plasma display device includes a metal chassis 45 as a chassis member, a casing 48 provided so as to cover the PDP 10 and the metal chassis 45, and a stand 12.

  The metal chassis 45 has a long side and a short side, aluminum having excellent mechanical rigidity and thermal conductivity is used, and the PDP 10 is bonded via a double-sided tape (not shown) having high thermal conductivity. . An electric circuit board (not shown) is attached to the back surface of the joint surface with the PDP 10. The casing 48 includes a front casing 48a, a rear casing 48c, and a side casing 48b that relays it. A front protective panel 49 made of tempered glass or the like is disposed inside the opening 50 of the front casing 48a, and a dust-proof sponge 46 for dust prevention is disposed in the gap between the front protective panel 49 and the PDP 10. It is installed. The PDP 10 and the casing 48 are fixedly supported via a fixing member 47.

  The apparatus 1 includes a main body 11 and a stand 12, and a metal chassis 45 of the PDP 10 of the main body 11 and a main body attaching portion 41 of the stand 12 are supported and fixed as follows. That is, the first support members 42 a, 42 b, 42 c, 42 d fixed to the metal chassis 45 are supported and fixed to the second support member 43, and the second support member 43 is supported and fixed to the main body mounting portion 41 of the stand 12. ing.

  Next, details of these supporting and fixing will be described.

  As shown in FIG. 6, the first support members 42a, 42b, 42c, and 42d fixed to the metal chassis 45 are angles having an L-shaped bent portion. These first support members 42 a, 42 b, 42 c, 42 d are fixed to the back surface of the metal chassis 45 with bolts or the like. Next, the flat plate-like second support member 43 is coupled and fixed to the first support members 42a, 42b, 42c, and 42d. At this time, the first support members 42 a, 42 b, 42 c, and 42 d are arranged at the four corners of the second support member 43. Furthermore, as shown in FIG. 5, a space 44 is formed between the metal chassis 45 and the second support member 43 due to the steps of the L-shaped bent portions of the first support members 42 a, 42 b, 42 c, 42 d. I am doing so. At this time, the first support members 42a, 42b, 42c, and 42d are coupled and fixed to the metal chassis 45 by the first fixing portions 421a, 421b, 421c, and 421d, as shown in FIG. Are coupled and fixed by second fixing portions 422a, 422b, 422c, and 422d.

  Further, the second support member 43 and the main body attachment portion 41 of the stand 12 are coupled and fixed by third fixing portions 411a, 411b, 411c, and 411d.

  At this time, as shown in FIG. 4, each of the first fixing portions 421a, 421b, 421c, 421d, the second fixing portions 422a, 422b, 422c, 422d, and the third fixing portions 411a, 411b, 411c, 411d. The positions are different from each other at the position projected onto the metal chassis 45 when viewed from the back side of the metal chassis 45. Further, the first fixing parts 421a, 421b, 421c, 421d are arranged outside the second fixing parts 422a, 422b, 422c, 422d, and the second fixing parts 422a, 422b, 422c, 422d are arranged in the third fixing part 411a. 411b, 411c, and 411d are arranged outside.

  Thus, in the plasma display device as the video display device according to the first embodiment of the present invention, the space 44 is provided between the metal chassis 45 and the second support member 43. Therefore, when an external force is applied to the main body 11 or a load caused by the weight of the main body 11 as a reaction, a load transmitted from the stand 12 to the metal chassis 45 as a reaction is represented by the first support members 42a, 42b, 42c. 42d and the second support member 43 can be absorbed. Therefore, it is possible to reduce the load applied to the PDP 10 and to realize a plasma display device in which the image quality is hardly deteriorated and the PDP 10 is hardly damaged.

  Further, the positions of the first fixing parts 421a, 421b, 421c, 421d and the third fixing parts 411a, 411b, 411c, 411d are different in the positions projected onto the metal chassis 45 when viewed from the back side of the metal chassis 45. When a stress due to an external force or its own weight is applied to the main body 11, the load transmitted from the stand 12 to the metal chassis 45 is not directly transmitted from the main body mounting portion 41 of the stand 12 to the metal chassis 45. Therefore, it is possible to reduce the load on the PDP 10 and further enhance the effect of preventing image quality degradation and damage to the PDP 10.

  Further, the first fixing parts 421a, 421b, 421c, 421d are arranged outside the second fixing parts 422a, 422b, 422c, 422d, and the second fixing parts 422a, 422b, 422c, 422d are the third fixing parts 411a. 411b, 411c, and 411d are arranged outside. Therefore, the load transmitted from the stand 12 to the metal chassis 45 can be transmitted while being diffused outward. As a result, the load on the PDP 10 can be further reduced, and the effect of preventing image quality deterioration and damage to the PDP 10 can be further enhanced.

  In Embodiment 1 of the present invention, the first support member and the second support member are configured as separate bodies, but may be integrated.

  In addition, in Embodiment 1 of this invention, as shown in FIG. 3, it is set as the structure which has the front surface protection panel 49, However, The same effect can be acquired also as a structure which affixed the protective film to the front plate 20. FIG. .

  Next, a modification of the first embodiment of the present invention will be described.

  FIG. 7 is a cross-sectional view showing the main internal configuration in a modified example of the apparatus 1, FIG. 7 (a) is a cross-sectional view taken along line AA in FIG. 2, and FIG. 7 (b) is a cross-sectional view in FIG. It is an expanded sectional view showing a part of composition in detail. 8 is a rear view of a modified example of the apparatus 1, and FIG. 9 is a top view of a modified example of the apparatus 1. In FIG. 9, a metal chassis 45 in the main body 11 is shown for the sake of simplicity. Only shows.

  In the present modification, the second support member is divided into two members. That is, it has the 2nd support members 43a and 43b.

  In the present modification, the back casing 48c is positioned between the first support members 42a, 42b, 42c, 42d and the second support members 43a, 43b. In other words, the second support members 43a and 43b are fixed to the first support members 42a, 42b, 42c, and 42d via the back casing 48c.

  Even in such a configuration, it is possible to obtain the same effects as those of the first embodiment before the above-described modification.

(Embodiment 2)
Next, a plasma display device 2 (hereinafter abbreviated as the present device 2) which is a video display device according to the second embodiment of the present invention will be described with reference to FIGS. Since the basic configuration of the apparatus 2 is the same as that of the plasma display apparatus 1 according to the first exemplary embodiment of the present invention, only the configuration different from the plasma display apparatus 1 will be described, and common components are denoted by the same reference numerals. Therefore, the description is omitted.

  FIG. 10 is a cross-sectional view showing the main components inside the apparatus 2. FIG. 11 is a rear view of the apparatus 2, and FIG. 12 is a top view of the apparatus 2. FIG. 13 is a perspective view showing details of the first support members 52 a and 52 b that support and fix the main body 11 and the stand 12 of the apparatus 2.

  As shown in FIGS. 10 and 11, in the present apparatus 2 according to the second embodiment of the present invention, at least two first support members 52a and 52b that are supported and fixed to a metal chassis 45 having a long side and a short side are arranged. Has been established. Moreover, as shown in FIG. 13, the first support members 52a and 52b are angles having convex bent portions. The first support members 52a and 52b are provided with a plurality (eight) of first fixing portions 521a, 521b, 521c and 521d which are coupled and fixed to the metal chassis 45 in the long side direction, Second fixing portions 522a, 522b, 522c, and 522d for connecting and fixing the member 43 are provided.

  In the present apparatus 2 according to the second embodiment of the present invention, the configuration of the first support members 52a and 52b is different from that of the first embodiment, and the configuration of other support members is the same as that of the first embodiment. is there.

  Next, details of supporting and fixing to the stand 12 in Embodiment 2 of the present invention will be described. First, first support members 52a and 52b having functions as two reinforcing members are disposed on the back side of the metal chassis 45, and are coupled and fixed to the metal chassis 45 by the first fixing portions 521a, 521b, 521c, and 521d. To do. Next, the second support member 43 and the first support members 52a and 52b are coupled and fixed by the second fixing portions 522a, 522b, 522c and 522d provided in the first support members 52a and 52b. Further, the second support member 43 and the main body mounting portion 41 of the stand 12 are coupled and fixed by third fixing portions 411a, 411b, 411c, and 411d provided on the second support member 43 and the main body mounting portion 41. .

  At this time, the positions of the first fixing portions 521a, 521b, 521c, and 521d, the second fixing portions 522a, 522b, 522c, and 522d, and the third fixing portions 411a, 411b, 411c, and 411d are shown in FIG. As shown in FIG. 4, the metal chassis 45 is disposed so as to be different from the position projected onto the metal chassis 45 when viewed from the back side. The first fixing portions 521a, 521b, 521c, and 521d are disposed outside the second fixing portions 522a, 522b, 522c, and 522d, and the second fixing portions 522a, 522b, 522c, and 522d are disposed in the third fixing portion 411a. 411b, 411c, and 411d are arranged outside.

  Also, as shown in FIG. 12, a space 44 is formed between the metal chassis 45 and the second support member 43 by the convex bent portions of the first support members 52a and 52b.

  Therefore, in the video display apparatus according to Embodiment 2 of the present invention, the first support members 52a and 52b can exhibit a function as a reinforcing member that reinforces the metal chassis 45. Therefore, even when a load is transmitted from the stand 12 to the metal chassis 45, deformation of the metal chassis 45 can be suppressed, and the load on the PDP 10 can be reduced to prevent image quality deterioration and damage to the PDP 10.

  In addition, even when subjected to an impact such as dropping, the deformation of the metal chassis 45 is reduced, and the effect of preventing the PDP 10 from being damaged can be obtained.

  Further, a space 44 is formed between the metal chassis 45 and the second support member 43, and the positions of the respective fixing portions are made different so that the second fixing portions 411a, 411b, 411c, and 411d are outside the second fixing portions. The fixing portions 522a, 522b, 522c, and 522d are arranged, and the first fixing portions 521a, 521b, 521c, and 521d are arranged outside the second fixing portions 522a, 522b, 522c, and 522d. According to such a configuration, as described in the first embodiment, when the external force is applied to the main body 11 or the load caused by the weight of the main body 11 as a reaction, the stand 12 is used as a reaction to the metal chassis. The load transmitted to 45 can be absorbed and diffused by deformation of each support member. Therefore, it is possible to reduce the load applied to the PDP 10 and to realize a plasma display device in which the image quality is hardly deteriorated and the PDP 10 is hardly damaged.

  In the second embodiment of the present invention, the length of the first support members 52a and 52b is smaller than the length of the short side of the metal chassis 45. The reinforcing effect of the first support members 52a and 52b can be further enhanced.

  Further, the arrangement positions of the first support members 52a and 52b can be optimized in consideration of the dimensions and shapes of the metal chassis 45 and the first support members 52a and 52b, the material characteristics, and the like. In the second embodiment of the invention, it has been confirmed that the following arrangement is optimal.

  That is, when the first support members 52a and 52b are arranged symmetrically with respect to the center line 60 of the long side of the metal chassis 45 having the long side and the short side, the long side length of the metal chassis 45 is A, the first support. When the distance between the members 52a and 52b is B, it is desirable that 0.15 ≦ B / A ≦ 0.55.

  Next, a modification of the second embodiment of the present invention will be described. FIG. 14 is a cross-sectional view showing the main internal configuration in a modification of the apparatus 2.

  In the present modification, the rear housing 48c is located between the first support members 52a and 52b and the second support members 43a and 43b. That is, the second support members 43a and 43b are fixed to the first support members 52a and 52b via the back casing 48c.

  Even in such a configuration, it is possible to obtain the same effects as those of the second embodiment before the above-described modification.

  The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this. That is, the description of the configuration of the above-described apparatus is an example, and it is obvious that various modifications and additions to these examples are possible within the scope of the present invention.

  In the above description, the plasma display device has been described as an image display device. However, it goes without saying that the present invention can also be applied to liquid crystal display devices, organic EL display devices, and the like that are increasing in size.

  As described above, when the video display device is installed on the installation stand by a stand or the like, it is possible to suppress deterioration in image quality and damage to the display panel due to external force or the weight of the display device, especially a large screen display device, etc. Useful for.

1, 2 Plasma display device (this device)
10 PDP
DESCRIPTION OF SYMBOLS 11 Main body 12 Stand 20 Front plate 21 Front glass substrate 22 Scan electrode 23 Sustain electrode 24 Display electrode pair 25 Dielectric layer 26 Protective layer 30 Back plate 31 Back glass substrate 32 Data electrode 33 Base dielectric layer 34 Partition 35 Phosphor layer 40 Sealing member 41 Main body attaching portion 42a, 42b, 42c, 42d, 52a, 52b First support member 43, 43a, 43b Second support member 44 Space portion 45 Metal chassis 46 Dust-proof sponge 47 Fixing member 48 Housing 48a Front housing 48b Side housing 48c Rear housing 49 Front protective panel 50 Opening 60 Center line 411a, 411b, 411c, 411d Third fixing portion 421a, 421b, 421c, 421d, 521a, 521b, 521c, 521d First fixing portion 422a, 422b, 422c, 422d, 5 22a, 522b, 522c, 522d 2nd fixing | fixed part

Claims (4)

A display panel;
A chassis member joined to the back surface of the display panel by a joining member;
A housing provided to cover the display panel and the chassis member;
A first support member fixed to the chassis member;
A second support member fixed to the first support member so as to provide a space between the chassis member,
A stand fixed to the second support member,
Video display device. A first fixing portion for coupling and fixing the chassis member and the first support member;
A second fixing portion for coupling and fixing the first support member and the second support member;
A third fixing part for coupling and fixing the second support member and the stand;
At least the positions of the first fixing portion and the third fixing portion are different in positions projected onto the chassis member when viewed from the back side of the chassis member.
The video display device according to claim 1. The first fixing part is arranged outside the second fixing part, and the second fixing part is arranged outside the third fixing part;
The video display device according to claim 2. The chassis member has a long side and a short side, and the first support member has a long side portion substantially parallel to the short side of the chassis member, and the central axis in the long side direction of the chassis member At least two are arranged so that
The video display apparatus as described in any one of Claims 1-3.

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