JPWO2007023534A1 - Display panel device - Google Patents

Abstract

The display panel device includes a display panel having a screen for displaying an image, a support (4) having a panel support surface (41) larger than the screen, and an adhesive member for attaching the display panel to the panel support surface (41). Is provided. The support body (4) has a connector portion (for connecting a through hole (45) leading from the back surface (42) to the panel support surface (41) and a pipe for supplying pressurized fluid to the through hole (45). 46). Gas or liquid can be pressed into the interface between the support (4) and the adhesive member through the through hole (45). The support (4) and the adhesive member are separated by the press-fitting, and the display panel is detached from the support (4) or easily detached.

Description

  The present invention relates to a display panel device including a display panel and a support attached to the back surface thereof, and more particularly to a display panel device in which the display panel can be easily removed.

  Display screens such as plasma display panels, liquid crystal panels, organic electroluminescence, and field emission displays are becoming larger. In particular, in a plasma display panel which is advantageous for increasing the screen, a screen exceeding 50 inches diagonal has already been realized.

  In assembling a display device including a plasma display panel, the plasma display panel is attached to a metal support and is attached to the housing of the display device in that state. As is widely known, the plasma display panel is a plate-like structure in which two glass substrates having a thickness of several mm in which electrodes are arranged are bonded together, and a support is required for the fixing. The support mechanically protects the plasma display panel, suppresses warpage, and dissipates heat from the screen. In general, a double-sided pressure-sensitive adhesive tape used for pasting has an appropriate flexibility to absorb the impact force in the thickness direction of the plasma display panel.

  The attachment of the plasma display panel to the support must be strong enough to withstand the load. On the other hand, it is required for pasting that resources that are important in industrial products in recent years can be easily reused. In addition, if the plasma display panel and the support can be easily separated, not only disassembly of the used display device but also display manufacturing performed after the plasma display panel is attached to the support in the manufacture of the display device. When a defect of the plasma display panel is found, the support can be reused without being discarded together with the plasma display panel.

  However, it is not easy to remove the plasma display panel attached with the double-sided adhesive tape from the support. For example, according to a general method in which a solvent is soaked from around the pasting surface to dissolve the adhesive, it takes 30 minutes or more. In particular, it takes a longer time to carefully remove the plasma display panel without damaging it in order to analyze the cause of the defect.

With respect to facilitating separation of the plasma display panel and the support, there is a prior art that uses a pasting material that weakens the bonding force when extended in a direction parallel to the pasting surface. Japanese Patent Application Laid-Open No. 2002-268777 describes the use of a double-sided pressure-sensitive adhesive tape in which an adhesive layer is formed on both sides of an elastic film having a breaking elongation of 300% or more. Japanese Patent Application Laid-Open No. 2004-333904 proposes applying a stretch-peeling adhesive to a pattern composed of a plurality of lines.
JP 2002-268777 A JP 2004-333904 A

  It is difficult to obtain a display panel device with high reliability by the above prior art characterized by the material of the pasting material. The affixing material must meet requirements such as joint strength, flexibility, thermal conductivity, and durability (aging characteristics). In addition to these requirements, the prior art requires extensibility to facilitate peeling. At present, there is no material having effective stretchability and sufficient durability.

  An object of the present invention is to facilitate the removal of a display panel attached to a support by an attaching material having no special property for peeling.

  A display panel embodying the present invention includes a display panel having a screen for displaying an image, a support having a panel support surface larger than the screen, and an adhesive member for attaching the display panel to the panel support surface. The support body includes a through hole that communicates from the back surface to the panel support surface, and a connector portion for connecting a pipe that supplies pressurized fluid to the through hole.

Gas or liquid can be injected into the interface between the support and the adhesive member through the through hole.
The support and the adhesive member are separated by press-fitting, and the display panel is detached from the support or is easily detached.

It is a disassembled perspective view which shows the structure of the display panel apparatus to which this invention is applied. It is principal part sectional drawing which shows an example of the connector part with which the support body which comprises a display panel apparatus is provided. It is a top view which shows an example of the groove | channel formed in the panel support surface of a support body. It is a top view which shows the other example of the groove | channel formed in the panel support surface of a support body. It is a perspective view which shows the external appearance of the display apparatus which assembled | attached the display panel apparatus. It is sectional drawing which shows the structure inside a display apparatus.

  In FIG. 1, a display panel device 1 includes a plasma display panel 2 having a screen 50 capable of color display, a filter 3 attached to the front surface of the plasma display panel 2, and a support 4 having a through hole 45 unique to the present invention. , And an adhesive member 5 for attaching the plasma display panel 2 to the panel support surface 41 of the support 4.

  The planar size of the plasma display panel 2 corresponds to the screen size. For example, when the screen size is 42 inches diagonal (0.92 m × 0.52 m), the horizontal dimension is about 0.99 m and the vertical dimension is about 0.58 m.

  The filter 3 is a laminated sheet including an antireflection layer, a dye filter layer, and an electromagnetic wave shielding layer.

  The support 4 is a bottomless box-shaped metal structure composed of a rectangular main surface portion larger than the screen 50 and a side surface portion connected to the periphery thereof. For example, an aluminum plate having a thickness of about 1 to 5 mm It is produced by pressing. The front surface of the main surface portion is flat, and this front surface is a panel support surface 41. A drive circuit board is attached to the back surface of the main surface portion together with a reinforcing block.

  In this example, one through hole 45 is formed at the center of the panel support surface 41. The through-hole 45 penetrates the main surface portion, that is, communicates from the front surface (panel support surface 41) to the back surface of the main surface portion. The practical size of the through hole 45 is about 3 mm to 10 mm in diameter.

  The adhesive member 5 is one double-sided adhesive sheet or several wide double-sided adhesive tapes arranged in parallel. The adhesive member 5 fixes the plasma display panel 2 to the support 4 with sufficient strength, and is interposed between the plasma display panel 2 and the support 4 as an impact absorbing layer having a thickness of about 1.5 mm to 2 mm. . The acrylic elastomer or the silicone elastomer is excellent in thermal conductivity (thermal conductivity 1.3 to 2.3 W / m · K), and is a suitable material for the adhesive member 5.

  As shown in FIG. 2, a connector 46 suitable for piping connection for supplying pressurized fluid to the through hole 45 is joined to the back surface 42 of the support 4. The connector 46 is a metal cylinder having an internal thread 46 </ b> A on the inner surface, and is disposed concentrically with the penetration height 5. The female screw 46A engages with a male screw 70A at the tip of the one-touch joint 70 that is a piping component. By screwing the one-touch joint 70 into the connector 46, the pipe 75 can be fixed to the support 4 and the flow path in the pipe and the through hole 45 can be communicated with each other. After fixing the one-touch joint 70 to the support 4, the pipe 75 may be attached to the one-touch joint 70.

  The connection of the pipe 75 to the through hole 45 is performed when the display panel device 1 is disassembled, specifically when the plasma display panel 2 and the support 4 are separated. That is, the through hole 45 and the connector 46 are provided for removing the plasma display panel 2. Hereinafter, a method for removing the plasma display panel 2 using the through holes 45 will be described.

  In the completed display panel device 1, the adhesive member 5 is in close contact with the panel support surface (front surface) 41 of the support 4, and the plasma display panel 2 is attached by the adhesive member 5. The through hole 45 is blocked by the adhesive member 5.

  In the removal method of this example, an air pressure source is connected to the support 4 in this state via a pipe 75 to apply air pressure to the through hole 45. For example, the pressure is set to 0.5 to 0.7 MPa, which is about the same level as general air blow.

  By applying the air pressure, the adhesive member 5 is peeled off from the support 4 in the vicinity of the through hole 45. Then, the peeled area extends from the vicinity of the through hole 45 to the periphery thereof, and the adhesive area gradually decreases. Thereby, the plasma display panel 2 is peeled off or easily peeled off.

  FIG. 3 shows a modification of the support.

  In the support 4b of FIG. 3, a plurality of grooves 47 extending radially from the through holes 45 to the periphery are formed on the panel support surface 41b for the purpose of speeding up the inflow of compressed air to the interface between the adhesive member 5 and the support 4. Has been. The depth of the groove 47 is about 0.3 to 0.5 mm and the width is about 1 mm. The groove 47 does not reach the periphery of the panel support surface 41b, and the periphery and the groove 47 are separated. This is a consideration to prevent the compressed air flowing from the through hole 45 from leaking to the outside through the groove 47 before the plasma display panel 2 is completely peeled off. Thereby, air pressure effectively acts on the separation of the adhesive member 5 and the support 4.

  The above removal method is a method in which the adhesive member 5 and the support 4 are physically peeled off by internal pressure, but there is also a method in which chemical action is emphasized. For this purpose, the following support is suitable.

  In the support body 4c of FIG. 4, three through holes 45a, 45b, 45c arranged along the length direction are provided at the center in the width direction, and the panel support surface 41c is extended from each through hole 45a, 45b, 45c. A plurality of grooves 48 extending to the edge are formed. The groove 48 reaches the periphery of the panel support surface 41c. That is, in the state where the adhesive member 5 is adhered, a channel connecting the through holes 45a, 45b, 45c and the outside is formed by the groove 48. The depth and width of the groove 48 are the same as in the above example.

  On the back surface of the support 4c, connectors 46 shown in FIG. 2 are provided for the through holes 45a, 45b, and 45c, respectively, and pipes are connected to the through holes 45a, 45b, and 45c in the same manner as in the above example. be able to.

  When removing the plasma display panel 2 attached to the support 4c, a predetermined pipe is connected to the support 4c, and hot air or a solvent such as acetone or alcohol is pressed into the through holes 45a, 45b, 45c. .

  The heated heated air or solvent flows out through the groove 48. If the press-fitting of the heated air is continued, the adhesive member 5 is heated evenly, and the adhesive force is weakened in the entire adhesive member 5. Further, due to the press-fitting of the solvent, the adhesive member 5 starts to melt from the vicinity of the groove 48, and eventually the adhesive member 5 dissolves over almost the entire area of the panel support surface 41c.

  The above display panel device 1 is incorporated in a display device as shown in FIGS. 5 and 6 and used for displaying an image.

  In FIG. 5, the display device 100 is a flat type. The decorative cover 101 that determines the planar size of the display device 100 has an opening larger than the screen 50, and the front surface of the display panel device 1 is exposed except for the peripheral portion.

  As shown in FIG. 6, which is a cross-sectional view taken along the line aa in FIG. 5, in the display device 100, the display panel device 1 is placed in the conductive circuit (shield housing) 102 to which the decorative cover 101 is attached. It is arranged with. The conductive case 102 includes a frame having an opening slightly larger than the screen and a plate molded in a thin box shape.

  The display panel device 1 is fixed by screwing the support 4 (chassis) to the conductive case 102. A drive circuit board 90 is disposed on the back side of the support 4. Flexible cables 8 and 9 are used for electrical connection between the drive circuit board 90 and the plasma display panel 2. In FIG. 6, the power supply, the video signal processing circuit, and the acoustic circuit are omitted.

  The plasma display panel 2 includes a front plate 10 and a back plate 20. Both the front plate 10 and the back plate 20 are made of a glass substrate having a thickness of about 3 mm.

  The front sheet 3 is a flexible laminate in which a functional film 3A having a multilayer structure having a thickness of 0.3 mm and an adhesive layer 3B having a thickness of approximately 0.5 mm are overlapped.

  In the above-described embodiment, the configuration of the display panel device 1 can be appropriately changed in accordance with the spirit of the present invention. The material and shape of the component are not limited to the examples. What is necessary is just to select the magnitude | size, the number, and formation position of the through-holes 45, 45a, 45b, 45c according to specifications, such as screen size and the adhesive force of the adhesive member 5. FIG. The connector 46 is not limited to the screw type as long as it is suitable for the piping to be used. A one-touch coupler may be used. If the support 4 has a sufficient thickness, a connector portion can be formed by processing a part of the support 4. Even if it is a screw hole which penetrates the support body 4, if it engages with piping components, it corresponds to the through hole and connector portion of the present invention. The arrangement pattern, arrangement density, pattern width, and depth of the grooves 47 and 48 of the supports 4b and 4c can be arbitrarily selected. Even when a plurality of adhesive tapes are applied as the adhesive member 5 with an interval of about 1 cm, for example, a groove is formed so that the injected gas or liquid acts effectively based on the adhesive tape application position. do it.

The present invention contributes to the reduction of waste in the manufacture of a display device and the reduction of the cost for reusing the components of the display device.

Claims (3)

A display panel device comprising a display panel having a screen for displaying an image, a support having a panel support surface larger than the screen, and an adhesive member for attaching the display panel to the panel support surface,
The display device according to claim 1, wherein the support includes a through hole that communicates from the back surface to the panel support surface, and a connector portion that connects a pipe that supplies pressurized fluid to the through hole. The display panel device according to claim 1, wherein a groove extending from the through hole toward the periphery thereof is formed on the panel support surface. The display panel device according to claim 1, wherein a plurality of grooves extending from the through hole to a peripheral edge of the support surface are formed on the support surface.