JP2009292491A - Method for packing displaying apparatus - Google Patents

Abstract

An object of the present invention is to provide a display device packaging method for preventing damage to a display panel used in a display device even when an impact is applied to the display device.
A display panel 100 having a structure in which two glass substrates 3 and 4 are bonded together, and a display device 200 having a protective glass 1 on the front side of the display panel 100, and a cushioning material 13 The cushioning material 13 is sandwiched between the protective glass 1 and the display panel 100, and is characterized in that the buffer member 13 is provided with a pull-out means 14 in which the one end 14a is in a state of coming out of the display device 200. A display device packaging method.
[Selection] Figure 5

Description

  The present invention relates to a packaging method for a display device having a configuration in which a protective glass is provided on the front side of a display panel.

  Recently, display panels such as plasma display panels (PDPs) and liquid crystal displays (LCDs) have been increased in size, and many manufacturers have commercialized large display devices over 30 inches using them. ing.

Such a display device has a structure in which two glass substrates are bonded together and a structure in which protective glass is provided on the front side of the display panel (see, for example, Patent Document 1).
JP 2003-131580 A

  Since the display panel as described above has a structure in which two glass substrates are bonded to each other, the weight increases as the size of the display panel increases. The magnitude of the impact has become larger than before.

  As a result, the occurrence of problems such as damage to the display panel due to the impact acting on the display panel has been seen more than ever.

  The present invention has been made in view of such a current situation, and provides a display device packaging method for preventing a display panel used in a display device from being damaged even if an impact is applied to the display device. For the purpose.

  In order to achieve the above object, a packaging method for a display device according to the present invention is a packaging method for a display device having a structure in which two glass substrates are bonded together and a protective glass on the front side of the display panel. The cushioning material is sandwiched between the protective glass and the display panel, and the cushioning material is provided with a pulling means whose one end is outside the display device. It is.

  ADVANTAGE OF THE INVENTION According to this invention, even if an impact acts on a display apparatus, the packaging method of the display apparatus can be provided so that a display panel used for the display apparatus may not be damaged.

  Hereinafter, although the packing method of the display apparatus by one Embodiment of this invention is demonstrated using figures, the aspect of this invention is not limited to this.

  FIG. 1 shows a schematic structure of a display device in a sectional view and a plan view. Typical examples of the display panel 100 include a plasma display panel (PDP), a liquid crystal panel (LCD), and a field emission display (FED). The display panel 100 includes a front glass substrate 3 and a back surface. The two glass substrates with the glass substrate 4 are sealed and bonded together only at the peripheral sealing portion.

  The display panel 100 having such a structure is fixed to one surface of a plate-like skeleton member 6 such as an aluminum chassis by using an adhesive sheet 5 or the like, and the display panel 100 is attached to the other surface of the skeleton member 6. A drive circuit 8 for driving is disposed, and further, a protective glass 1 is provided on the front side of the display panel 100 with a frame portion 2 through a gap 150 to constitute a display device 200.

  In addition, on the surface of the protective glass 1, an optical functional film such as an antireflection functional film, a light transmittance adjusting film, a light deflecting film, or the like is formed as necessary so as to obtain desired optical characteristics. Or a film or a film for shielding electromagnetic waves is formed.

  Here, conventionally, as a packing method of the display device 200, as shown in a schematic configuration in FIG. 2, the four corners of the display device 200 are fixed with a molded cushioning material 9 such as foamed polystyrene, and the cardboard box or the like is packed. It was common to pack in a box 10.

  However, in such a packing method, for example, when the packing box 10 falls down in the forward direction of the display device 200 during transportation, the strength is weak in strength. Even if the molded cushioning material 9 is made thick, it is hardly possible to suppress the cracking of the display panel against this kind of impact, and in particular, the front glass substrate of the display panel constituting the display device 200 is damaged. It has become clear from experiments conducted by the present inventors that it is easy.

  Here, the occurrence of the above problem is considered to be related to the structure of the display device 200. That is, the display panel in the PDP, LCD, FED, etc. is composed of two glass substrates as shown in FIG. 3 in a plan view schematically showing a state in which the display panel 100 is bonded to the skeleton member 6. Since the back glass substrate 4 of the display panel 100 is bonded to the skeleton member 6 so that the entire surface is reinforced with strength. However, the front glass substrate 3 has a structure that is supported only by the peripheral sealing portion 12.

  Therefore, when the packaging box 10 (FIG. 2) falls to the display surface side (front side) of the display device 200, as shown in FIG. 4, the schematic configuration of the display device in a packaged state is shown in a cross-sectional view from above. Although the deformation of the rear glass substrate 4 due to impact can be suppressed, the front glass substrate 3 is supported only by the sealing portion 12 around the glass substrate, so that the display panel 100 itself is expanded in the front direction. It is considered that the glass substrate 3 is easily deformed, resulting in a large deformation, and the worst result is that the front glass substrate 3 is damaged such as a crack.

  This damage is not a problem in a display device having a screen size of 30 inches or less, but becomes more prominent as the screen size becomes larger than 30 inches. The reason is considered to be as follows.

  First, when the display panel 100 is enlarged, the distance between the fixing portions of the front glass substrate 3 is increased, and the interval between the sealing portions 12 with the rear glass substrate 4 is increased. In the flat plate structure in which the four sides are fixed and supported. This is because the strength against impact decreases in inverse proportion to the square of the short-side distance, and thus is easily damaged.

  Further, when the display panel 100 becomes large, the weight of the front glass substrate 3 itself becomes heavy. Similarly, when an impact is applied, the deformation of the front glass substrate 3 becomes large, and as a result, the front glass substrate 3 tends to be damaged. That is why.

  Furthermore, in the process of manufacturing a display panel, when a thick film member such as an electrode or a dielectric layer is laminated and formed on a glass substrate through a baking process at a high temperature, it is formed by a baking process at a high temperature. In the thick film multilayer structure, residual stress is present at the film interface and the presence of this residual stress greatly reduces the strength inherent in the glass substrate. The reason is that the stress becomes more prominent as the size of the glass substrate is larger.

  From the above, the larger the front glass substrate 3 is, that is, the larger the display device is, the more serious the problem that breakage occurs when an impact is applied.

  Here, in the display device 200, the protective glass 1 is also a structure in which only the periphery thereof is fixed and supported by the frame portion 2. Therefore, like the front glass substrate 3, the protective glass 1 is not easily damaged by an impact. However, the protective glass 1 is originally installed to protect the display panel 100 constituted by the glass substrate, and is like a glass substrate used for the front glass substrate 3 and the rear glass substrate 4 of the display panel 100. In addition, since there is no high temperature process such as firing, there is no restriction on the glass substrate material from the process, and therefore, even with the same glass thickness, stronger than the glass substrate of the display panel 100, such as tempered glass. Can also be used, and in fact, because it is configured like that, In result, the always so that the generated front glass substrate 3 of the display panel 100 as breakage during transport.

  In view of the situation as described above, in the present invention, the packaging state of the display device 200 is schematically shown in a sectional view in FIG. 5, between the protective glass 1 and the front glass substrate 3 of the display panel 100. The cushioning material 13 is fixed between the protective glass 1 and the display panel 100 by inserting the cushioning material 13 provided with a string as the pulling means 14 in the substantially central portion of the display area of the gap. In other words, in this state, the four corners of the display device 200 are fixed with a cushioning material 9 such as foamed polystyrene, and packed in a packing box 10 such as a cardboard box.

  FIG. 6A shows a schematic configuration of an example of the cushioning material 13 provided with a string as the pulling means 14. Note that one end 14a of the pulling means 14 opposite to the cushioning material 13 protrudes to the outside of the display device 200 through the outlet 15 as schematically shown in FIG.

  Further, as the buffer material 13, it does not leave scratches, dirt, adhesive marks, etc. on the surface of the protective glass 1 or the front glass substrate 3 of the display panel 100, and the protective glass 1 and the display panel 100 are good. Thickness that can be sandwiched in a state, that is, does not fall off when inserted into the gap between the protective glass 1 and the display panel 100, and does not generate an excessive pressing force on the display panel 100 and the protective glass 1, For example, the thickness is preferably substantially equal to the thickness of the gap between the protective glass 1 and the display panel 100. For example, a material such as hard felt is preferably used.

  It has been confirmed that by inserting the cushioning material 13 substantially in the center of the display area, the resistance against cracking of the front glass substrate can be greatly improved even against a relatively large impact such as that caused by a fall. .

  That is, in the conventional structure, since the support point is only the peripheral part of the panel and the central part is free, the deformation at the time of impact action causes the deformation so that the central part of the front glass substrate 13 is maximized. As a result, there is a high probability that the front glass substrate 13 will be broken, but according to the PDP packaging method according to the embodiment of the present invention as described above, as shown schematically in FIG. In addition, by sandwiching the buffer material 13 between the protective glass 1 and the display panel 100, the central portion of the front glass substrate 3 is pressed to the back glass substrate 4 side. Therefore, the distance between the support points of the front glass substrate 3 is approximately ½ of that of the conventional structure. Of front glass substrate 3 at the time of the action, the deformation such as swelling in the front side, and it is greatly reduced compared with the case of the conventional structure, it is considered that it is possible to prevent breakage of front glass substrate 3. Theoretically, the strength improvement is about 4 times when the support point distance is approximately ½.

  As described above, the buffer material 13 has a thickness that can be sandwiched between the protective glass 1 and the front glass substrate 3 in a good state, that is, when inserted into the gap between the protective glass 1 and the front glass substrate 3. And does not generate an excessive pressing force on the front glass substrate 3 and the protective glass 1, for example, a thickness substantially equal to the thickness of the gap between the protective glass 1 and the front glass substrate 3. In addition, it is also possible to use a material that generates a large amount of friction with respect to glass, for example, a silicon resin system.

  Here, an experiment conducted by the present inventor, specifically, a 42-inch size PDP is used as the display device 200, and the PDP is buffered in the gap between the protective glass 1 and the front glass substrate 3 of the display device 200. A display device for 10 units each of which is packed by a packing method in which a cylindrical hard felt having a diameter of 20 mm is sandwiched as the material 13 and which is packed by a packing method in which the cushioning material 13 is not sandwiched. As a result of a panel strength test in which an impact is generated by falling to the front side of the display screen of 200, the PDP has cracked in 6 out of 10 in the packing method in which the cushioning material 13 is not sandwiched in the gap. In the packing method in which the cushioning material 13 is sandwiched, it has been confirmed that no cracks are generated. Even for relatively large impact, such as those generated, it can be seen that the resistance to cracking of the front glass substrate can be greatly improved.

  The above result is a case where a relatively large impact is applied such that the display device 200 falls to the front side of the display surface by the buffer material 13 having a diameter of 20 mm inserted between the protective glass 1 and the front glass substrate 3. However, the front glass substrate 3 is deformed in the case of the conventional packing method shown in FIG. 4, that is, the packing method in which the cushioning material 13 is not sandwiched, as schematically shown in FIG. This is probably because it can be significantly suppressed compared to deformation.

  As described above, the cushioning material 13 is sandwiched between the protective glass 1 and the front glass substrate 3 of the display panel 100 only in the substantially central portion without sandwiching the cushioning material having the same size as the front glass substrate 3. This means that the strength in the packaged state can be greatly improved, and it can be seen that sufficient impact resistance can be realized with a low-cost cushioning material.

  In the above description, the example in which the cushioning material 13 is inserted substantially in the center with respect to the front glass substrate 3 has been described. However, the present invention is not limited to this. It has been confirmed that an effective effect of improving the strength can be obtained if it is sandwiched within a certain area. Theoretically, the distance between the support points can be shortened by 0.75 times at least around the panel and the inserted cushioning material, compared to the state in which no cushioning material is inserted. This result is supported by the fact that a certain degree of impact strength improvement can be secured.

  In addition, in the above, since the effect by which the one where the intensity | strength of the protective glass 1 itself is higher becomes large becomes large, as a protective glass 1, generally called tempered glass is used, and glass strength is the square of thickness. Therefore, it is desirable to take measures such as using glass that is as thick as possible, for example, glass that is thicker than the thickness of the front glass substrate 3.

  Here, when using the display device, it is necessary to remove the buffer material 13 at least outside the image display area. However, the buffer material 13 in the PDP packing method according to the embodiment of the present invention includes the buffer material 13 as described above. Further, a string as the pulling means 14 is provided, and one end 14a of the string has a structure protruding to the outside of the display device 200. Therefore, by pulling the pulling means 14, the cushioning material 13 is displayed as an image. Can be removed outside the area.

  More specifically, one end 14a of the drawer means 14 provided in the cushioning material 13 is packed in a state in which it is pulled out of the display device 200 from the take-out port 15 provided in the lower part of the frame portion 2 of the display device 200. When the bag 200 is taken out of the package and actually used, the cushioning material 13 inserted in the gap (gap) between the protective glass 1 and the front glass substrate 3 of the display panel 100 is attached to the string which is the pulling means 14. By pulling, it is taken out from the take-out port 15 at the lower part of the frame part 2.

  The packing structure using the cushioning material 13 as described above can prevent the display device 200 from being damaged during packing, can be safely transported, and can be easily used without removing the protective glass 1 during use. In addition, the buffer material 13 can be taken out of the image display area.

  Here, the cushioning material 13 is securely sandwiched in the gap between the protective glass 1 and the display panel 100, and has a strength that can serve as a supporting point against deformation of the front glass substrate 3 during an impact action. Since it is required to have an appropriate slip property that does not damage the protective glass 1 or the front glass substrate 3 of the display panel 100 when being pulled out of the glass, for example, a cylindrical hard felt It is also preferable to use a cylindrical silicon-based resin or a silicon-based resin material with a hard felt attached only to the surface that contacts the protective glass or display device. good.

  The shape is not limited to a cylindrical shape, and the same effect can be obtained even when the shape is a cube, a rectangular parallelepiped, a sphere, or the like.

  Further, as shown schematically in FIG. 8, the storage means 16 for storing the buffer material 13 is provided in the frame portion 2 of the display device 200, and the drawer means 14 provided in the buffer material 13 is provided from the takeout port 15. By pulling the one end 14a of the string, it may be drawn to the storing means 16 and stored, and then the pulling means 14 may be cut as necessary. Also with such a mechanism, the buffer material 13 can be moved out of the display area.

  In addition, if the cushioning material 13 moves freely in the storage means 16, it may cause abnormal noise during vibration, etc., so that the movement of the cushioning material 13 in the storage means 16 is restricted. It is preferable to provide a restricting means.

  Further, since the temperature of the display device 200 increases when the display device 200 is used, it is preferable that the cushioning material 13 is made of a flame-retardant material for safety.

  Moreover, in the above description, although the case where the number of the buffer materials 13 inserted in the gap between the protective glass 1 and the front glass substrate 3 is one was described, the number of buffer materials 13 is not limited to one, and of course, the buffer material 13 to be inserted. A larger number is more preferable because the distance between the supporting points is further shortened and the impact resistance at the time of packaging is improved.

  As described above, the present invention is useful for providing a display device.

The figure which shows schematic structure of a display apparatus The figure which shows the packing method of the conventional display apparatus roughly The figure which shows the state in which the display panel was bonded together to the frame | skeleton member roughly The figure which shows schematically the deformation | transformation state of the front glass substrate in the packing method of the conventional display apparatus. The figure which shows schematically the packing method of the display apparatus by one embodiment of this invention. The figure which shows schematically an example of the shock absorbing material and the drawer means in the packing method of the display apparatus by one embodiment of this invention The figure which shows schematically the deformation | transformation state of the front glass substrate in the packaging method of the display apparatus by one embodiment of this invention. The figure which shows schematically the packaging method of the display apparatus by other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protective glass 2 Frame part 3 Front glass substrate 4 Back glass substrate 5 Adhesive sheet 6 Skeletal member 7 Back cover 8 Drive circuit 9 Buffer material 10 Packing box (lower part)
DESCRIPTION OF SYMBOLS 12 Sealing part 13 Buffer material 14 Pull-out means 15 Taking-out port 16 Storage means 100 Display panel 150 Gap 200 Display device

Claims (6)

A display panel having a structure in which two glass substrates are bonded together, and a packaging method for a display device including a protective glass on the front side of the display panel,
Cushion the cushioning material between the protective glass and the display panel,
The cushioning material includes a pulling means having one end protruding to the outside of the display device. 2. The display device packing method according to claim 1, wherein a cushioning material is inserted in a substantially central portion of the image display area in the gap between the protective glass portion and the display panel. 2. The display device packaging method according to claim 1, wherein the protective glass is stronger than the glass substrate. The packing method for a display apparatus according to claim 1, wherein the protective glass is thicker than the glass substrate. The display device packing method according to claim 1, wherein the display device has a screen size of 30 inches or more. The display device packing method according to claim 1, wherein the display device is a plasma display device using a plasma display panel as a display panel.

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