JP2009122425A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device that prevents a display panel from being broken even if the display device is dropped or fallen down during its physical distribution. <P>SOLUTION: Disclosed is the display device having a housing which cover a PDP 10 and a chassis 44, the housing comprising a front housing unit 41 having an opening portion 54 corresponding to an effective display area of a front plate 20, a front protective glass substrate 43 fixed to the front housing unit 41 to be provided in the opening portion 54, a side surface housing unit 51 coupled to the front housing unit 41, and a back housing unit 42 coupled to the side surface housing unit 51 to cover the back of the chassis member 44. The housing has a fitting member 52 coupling a peripheral portion of the chassis member 44 to at least one of the front housing unit 41, side surface housing unit 51, and back housing unit 42, the fitting member 52 including an elastic deformation unit 56 which allows the PDP 10 to be displaced in a normal direction of the front protective glass substrate 43. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device having a structure for preventing a glass substrate from being cracked or broken when falling.

  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 as a display device suitable for thin and large size, and has been produced and sold in large quantities. It is 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. Further, a discharge gas formed by mixing neon (Ne), xenon (Xe), or the like is sealed in the discharge space.

  A chassis member is affixed 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, and the chassis member is fixed to a mounting bracket by screws around the chassis member. 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 front frame and a back cover for protecting the PDP and the circuit board. A front protective glass substrate is attached to the front casing portion having an opening provided corresponding to the effective display area of the front plate at a predetermined interval on the surface of the front plate of the PDP. The front protective glass substrate has color tone correction, contrast improvement, and electromagnetic wave shielding function.

  When such a plasma display device is dropped on the front surface (dropped from the panel surface) during transportation or unpacking, the front plate is sealed around the periphery of the back plate fixed by the chassis member. Since it is only supported and fixed by the stop portion, it bends in a mortar shape with the sealing portion as a fulcrum, and the front plate is cracked or broken.

  In order to reduce this crack and breakage, a frame-like elastic member is arranged along the periphery of the image display area in the gap between the front plate surface and the front protective glass substrate, and the impact resistance in the surface direction of the PDP is improved. An example of blocking dust from the outside is disclosed (for example, see Patent Document 1).

As an example of suppressing the destruction of the PDP when the front surface is dropped, a plurality of spring structures are provided on the chassis member bonded with the PDP and the bonding member, and the space between the spring structure and the rear casing is provided. An example of providing a connecting component (spacer) that is fixedly connected is disclosed (for example, see Patent Document 2). Moreover, the example which provides a pillar in a chassis member and provides and connects an elastic member between a pillar and a back housing | casing part is also disclosed (for example, refer patent document 3).
JP 2003-131580 A JP 2007-33566 A JP 2002-108225 A

  However, even if the elastic member is arranged at the sealing portion which is a fulcrum of bending, the bending of the front plate itself cannot be suppressed and the occurrence of cracks in the sealing portion cannot be suppressed. In addition, there is an effect that the degree of bending of the front plate is slightly reduced by the frame-like elastic member, but since the elastic member is in contact with the front plate, the initial impact force is directly applied to the sealing portion around the front plate. In addition, there is a problem that the strain concentrates there and cracks occur and the front plate is easily cracked. Further, if the elastic member is softened so as to reduce the initial impact force, there is a problem that bending cannot be suppressed.

  Further, in the example in which the spring-like structure and the connecting part are provided between the chassis member bonded to the rear surface of the display panel and the rear housing portion, it can be buffered against the impact on the display panel. There is a problem that the structure of the apparatus becomes complicated.

  An object of the present invention is to solve the above-described problems and to provide a display device capable of improving the impact resistance performance of a PDP caused by a front surface drop.

  In order to solve the above problems, a display device of the present invention includes a display panel in which peripheral portions of a front plate and a back plate are joined by a sealing member, a chassis member joined to the back plate of the display panel by a joining member, A display device comprising a housing provided so as to cover a display panel and a chassis member, wherein the housing is provided with an opening corresponding to an effective display area of the front plate, and a front housing portion A front protective glass substrate fixed to the opening, a side casing connected to the front casing, and a rear casing connected to the side casing and covering the rear surface of the chassis member. And a mounting member for connecting the peripheral portion of the chassis member and at least one of the front casing portion, the side casing portion, and the rear casing portion, and the mounting member is normal to the front protective glass substrate. Constitute comprise an elastic deformation portion displaced.

  With such a configuration, when the display device receives an impact due to a front drop or the like, the entire display panel moves so as to be displaced in the normal direction of the front protective glass substrate due to the deformation of the elastic deformation portion. However, the display panel is not bent so as to bend together with the chassis member, and it is possible to prevent the front plate from being largely bent particularly with the sealing portion as a fulcrum. Damage can be prevented.

  Furthermore, it is desirable that the attachment member and at least one of the front casing part, the side casing part, and the rear casing part are slidably engaged via the guide member. According to such a configuration, the attachment member can easily displace the entire display panel in the normal direction of the front protective glass substrate, and the displacement direction can be further regulated.

  Furthermore, the elastically deformable portion may be made of a rubber material. According to such a configuration, the display panel can be easily displaced toward the front protective glass substrate by the rubber material, and the configuration can be facilitated.

  ADVANTAGE OF THE INVENTION According to this invention, even when display panels, such as PDP, fall to the front, the display apparatus which suppressed destruction of the display panel and improved impact resistance performance can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiment of the present invention, a plasma display device will be described as an example of a display device, and a display panel will be described as a PDP.
(Embodiment 1)
FIG. 1 and FIG. 2 are an exploded perspective view of a main part showing a basic configuration of a PDP used in a plasma display device as a display device, and a plan view of the PDP. 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.

  As shown in FIG. 2, 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 intersect with each other with a minute discharge space interposed therebetween, and the outer peripheral portion thereof is made of glass frit or the like. The sealing member 36 is sealed. 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.

  FIG. 3 is an exploded perspective view showing the main configuration of the plasma display device. In the plasma display device 40, the PDP 10 is housed in a housing including a front housing portion 41 and a back housing portion 42. In the present embodiment, the front casing 41 serves as a side casing.

  The front housing part 41 is provided with an opening corresponding to the effective display area of the front plate 20, and a front protective glass substrate 43 such as a glass substrate is disposed in the opening. The back plate 30 of the PDP 10 is joined via a joining member 46 to a chassis member 44 that is also made of a metal plate such as aluminum (Al) and also serves as a heat sink. The joining member 46 is formed of an adhesive or fusion-bonding material, and joins almost the entire surface of the rear glass substrate 31 of the PDP 10 and the chassis member 44 to transfer heat generated from the PDP 10 to the chassis member 44. Further, a circuit board 45 constituting a circuit block for driving the PDP 10 is fixed to the chassis member 44.

  The front protective glass substrate 43 serves as an optical filter and protects the PDP 10, and is subjected to, for example, silver (Ag) vapor deposition in order to suppress unnecessary radiation of electromagnetic waves. In addition, the rear housing part 42 is provided with a plurality of vent holes 42a for releasing heat generated in the PDP 10 and the circuit board 45 to the outside. The circuit board 45 is attached to the back side of the chassis member 44 and includes an electric circuit for driving and controlling the PDP 10. The circuit board 45 is pulled out to the edge of the PDP 10 by a plurality of flexible wiring boards (not shown). It is electrically connected to an electrode lead part (not shown).

  FIG. 4 is a cross-sectional view showing the structure of such a plasma display device 40, FIG. 4 (a) is a cross-sectional view showing the structure in a stationary state, and FIG. 4 (b) is a plasma display with the surface of the PDP 10 facing downward. It is sectional drawing which shows the state at the time of dropping the apparatus 40. FIG.

  As shown in FIG. 4A, the back plate 30 of the PDP 10 whose periphery is sealed and bonded by the sealing member 36 is bonded and fixed to the chassis member 44 by a bonding member 46 such as an adhesive sheet. The chassis member 44 has a mounting bracket 50 partially extended, and the mounting bracket 50 is fixed to a mounting member 52 provided on a side casing 51 that is a part of the casing by screws 53 or the like. Yes. The attachment member 52 is also fixed to the front housing part 41 with screws 53 or the like. Further, the front plate 20 and the front protective glass substrate 43 are configured to be separated from each other while maintaining a predetermined distance.

  When the plasma display device 40 configured as described above is dropped in the direction of the arrow in FIG. 4B, that is, in the direction of the front plate 20 during transportation or unpacking, the PDP 10 is a chassis member. 44 bending is superimposed and it bends in a mortar shape. However, the front plate 20 is only fixed to the rear plate 30 by the sealing member 36 at the peripheral edge. Therefore, the central region of the front plate 20 is largely bent with the sealing member 36 as a fulcrum. For this reason, a stress acts on the region of the sealing member 36, and a crack in the sealing member 36, a glass substrate crack in the region, and the like occur. As a result, the PDP 10 is destroyed due to the impact of the front drop.

  On the other hand, FIG. 5 is a partially enlarged cross-sectional view of the plasma display device as the display device according to the first embodiment of the present invention. FIG. 5 (a) shows a stationary state before the impact of the front drop is applied. b) shows a state when the front surface is dropped. The configuration shown in FIG. 5 is basically the same as the configuration shown in FIG.

  As shown in FIG. 5 (a), the plasma display device 40 is adhered to the PDP 10 including the front plate 20, the back plate 30, and the sealing member 36 that seals the outer periphery of the plasma display device 40. The chassis member 44 and a housing are used. The casing is composed of a front casing 41 having an opening 54 of the PDP 10 in the center, a side casing 51 connected to the outer periphery of the front casing 41, and a rear casing 42. A front protective glass substrate 43 that protects the PDP 10 and a dustproof member 55 disposed between the front protective glass substrate 43 and the PDP 10 are provided on the front casing 41.

  The chassis member 44 has a mounting bracket 50 that is partially extended. The mounting bracket 50 is fixed to one end of the mounting member 52 with a screw 53 or the like, and the other end of the mounting member 52 is It is fixed by the front casing 41 and screws 53 or the like. Further, the front plate 20 and the front protective glass substrate 43 are configured to be separated from each other while maintaining a predetermined distance.

  Therefore, the attachment member 52 connects the chassis member 44 and the front housing part 41, and further has an elastic deformation part 56 that bends in a dogleg shape at an intermediate part thereof. The attachment member 52 is formed of a metal plate or the like, and the elastic deformation portion 56 is configured such that the metal plate is bent and bent. Further, the attachment member 52 and the side housing part 51 are slidably engaged via the guide member 65. That is, the mounting member 52 is fitted into the guide member 65 fixed to the side housing portion 51 so as to be slidable on the guide member 65.

  Accordingly, the mounting member 52 slides on the guide member 65 due to the deformation of the elastic deformation portion 56, and the PDP 10 integrated with the chassis member 44 is easily displaced in the normal direction of the front protective glass substrate 43, and Further, the direction of displacement is restricted only in the normal direction of the front protective glass substrate 43. Although not shown, the guide member 65 has a recess-shaped rail portion so that the mounting member 52 can easily slide, and further includes a spring spring or the like in the rail portion for positioning the mounting member 52. Also good. Moreover, you may further provide the elastic member which returns the attachment member 52 which moves by the deformation | transformation of the elastic deformation part 56. As shown in FIG.

  On the other hand, FIG. 5B shows a state where an impact due to dropping or the like is applied in the direction of the arrow. When an impact is applied in the direction of the arrow, that is, when a drop impact is applied with the surface of the PDP 10 facing downward, in the first embodiment of the present invention, the elastic deformation portion 56 is bent by the weight of the PDP 10 and the chassis member 44. Then, the PDP 10 can be displaced so as to move parallel to the direction of the front protective glass substrate 43 to absorb and mitigate the impact.

  Therefore, it is possible to suppress the bending of the front plate 20 with the sealing member 36 as a fulcrum and reduce the amount of bending. Therefore, even if it receives a drop impact, the sealing member 36 and the front plate 20 can be prevented from cracking, and the impact resistance and reliability of the plasma display device as the display device can be improved.

  In FIG. 5, it is desirable to provide a plurality of attachment members 52 provided with elastic deformation portions 56 around the chassis member 44 so as to disperse the impact.

  The deformation direction of the elastic deformation portion 56 may be a direction in which the PDP 10 moves in parallel to the front protective glass substrate 43, and is not necessarily limited to the bending direction as shown in FIG. Further, in FIG. 5, the elastically deformable portion 56 is formed in a dogleg shape, but may be, for example, a Z shape, and more specifically, it is not necessarily an elastically deformable portion integrated with the mounting member 52, For example, a configuration in which a coil spring or a leaf spring is inserted in the middle of the attachment member 52 may be used.

The first embodiment of the present invention shows an example in which the attachment member 52 is provided in the side casing 51. However, depending on the configuration of the casing, the mounting member 52 is provided in the front casing 41 or the rear casing 42. May be.
(Embodiment 2)
FIG. 6 is a partially enlarged cross-sectional view of a plasma display device as a display device according to Embodiment 2 of the present invention. FIG. 6 (a) shows a stationary state before the impact of the front drop is applied, and FIG. 6 (b). Indicates the state when the front surface is dropped. The configuration shown in FIG. 6 is basically the same as the configuration shown in Embodiment 1 shown in FIG. 5, and the following configuration is different.

  That is, in the second embodiment of the present invention, the attachment member 52 is constituted by an attachment member 52a that is fixed to the chassis member 44 and an attachment member 52b that is fixed to the front housing portion 41. A rubber material 60 is interposed between the two.

  In this way, by interposing the rubber member 60 between the attachment member 52a and the attachment member 52b, when an impact is applied in the direction of the arrow, the rubber member 60 moves in parallel with the PDP 10 relative to the front protective glass substrate 43. It can be elastically deformed in the direction to absorb and relax the impact. Further, the impact can be dispersed by forming a plurality of attachment members 52 around the chassis member 44.

  Therefore, it is possible to suppress the bending of the front plate 20 with the sealing member 36 as a fulcrum and reduce the amount of bending. Therefore, even if it receives a drop impact, the sealing member 36 and the front plate 20 can be prevented from cracking, and the impact resistance and reliability of the plasma display device as the display device can be improved.

  In the description of the first embodiment and the second embodiment, the bent elastic deformation portion 56 or the elastic deformation portion is provided between the attachment member 52 that connects the chassis member 44 and the front housing portion 41. The configuration for arranging the rubber member 60 has been described. However, one end of the attachment member 52 may be fixed to the rear casing part 42 or the side casing part 51.

  As described above, according to the present invention, it is possible to realize a display device that reduces the shock-absorbing packing material and does not cause breakage of the display panel even when the display device is dropped during distribution. Useful for display devices.

The disassembled perspective view of the principal part which shows the basic composition of PDP used for the plasma display apparatus as a display apparatus Plan view of the PDP An exploded perspective view showing the main configuration of the plasma display device Partial sectional view showing the structure of the plasma display device Partially enlarged sectional view of a plasma display device as a display device in Embodiment 1 of the present invention Partially enlarged sectional view of a plasma display device as a display device in Embodiment 2 of the present invention

Explanation of symbols

10 PDP
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 Rear glass substrate 32 Data electrode 33 Base dielectric layer 34 Partition 35 Phosphor layer 36 Sealing member 40 Plasma display device 41 Front housing part 42 Rear housing part 42a Vent hole 43 Front protective glass substrate 44 Chassis member 45 Circuit board 46 Joining member 50 Mounting bracket 51 Side housing parts 52, 52a, 52b Mounting member 53 Screw 54 Opening 55 Dust-proof member 56 Elastic deformation part 60 Rubber material 65 Guide member

Claims (3)

A display panel in which peripheral portions of a front plate and a back plate are joined by a sealing member, a chassis member joined to the back plate of the display panel by a joining member, and the display panel and the chassis member are provided to be covered. A display device comprising a housing,
A front case portion provided with an opening corresponding to an effective display area of the front plate, a front protective glass substrate fixed to the front case portion and provided in the opening, and the front case A side case portion connected to the side portion, and a rear case portion connected to the side case portion and covering the back surface of the chassis member, and the peripheral portion of the chassis member and the front case portion, A mounting member that connects at least one of the side housing and the rear housing, and the mounting member includes an elastically deforming portion that displaces the display panel in a normal direction of the front protective glass substrate. A display device characterized by that. 2. The mounting member and at least one of the front casing part, the side casing part, and the rear casing part are slidably engaged with each other via a guide member. Display device. The display device according to claim 1, wherein the elastic deformation portion includes a rubber material.

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