JP2007133285A - Display device and portable apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device having a light source and a frame which can be reused after disassembling the device. <P>SOLUTION: The display device (an LCD unit 1) includes a sub-panel 10, an LED 33 to supply light to the sub-panel 10, a resin frame 31 to install the LED 33, a reinforcing plate 40 disposed between the sub-panel 10 and the resin frame 31, and a single-sided tape 39 adhered to the resin frame 31 and disposed between the resin frame 31 and the reinforcing plate 40. The single-sided tape 39 has an adhesive face 39a to adhere to the resin frame 31 and an upper face 39b having no adhesion function with zero adhesion strength in the reinforcing plate 40 side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device and a portable device, and more particularly to a display device and a portable device provided with a frame for installing a light source.

  Conventionally, a liquid crystal display device including a frame for installing a light source is known (see, for example, Patent Document 1). Patent Document 1 discloses a liquid crystal display device having a configuration in which a backlight (light source) and a backlight unit including a resin frame for housing the backlight and a liquid crystal display panel are bonded via a light-shielding double-sided tape. Has been. In the liquid crystal display device disclosed in Patent Document 1, the resin frame is bonded to the upper surface side of the resin frame and the lower surface side opposite to the display surface of the liquid crystal display panel by using a light-shielding double-sided tape. The entry of foreign matter such as dust from between the liquid crystal display panel is suppressed.

JP 2004-361654 A

  However, in the liquid crystal display device disclosed in Patent Document 1, when the liquid crystal display panel is disassembled (stripped) from the resin frame, a force (load) to peel off the light-shielding double-sided tape from the resin frame housing the backlight is generated. There is an inconvenience of joining. For this reason, there is an inconvenience that the resin frame and the backlight may be damaged by transmitting the force required for the peeling to the resin frame and the backlight. As a result, there is a problem that it becomes difficult to reuse the resin frame and the backlight when the liquid crystal display device is reassembled after being disassembled.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a display device and a portable device that can reuse a light source and a frame after disassembly. It is.

Means for Solving the Problems and Effects of the Invention

  To achieve the above object, a display device according to a first aspect of the present invention includes a first display panel, a light source for supplying light to the first display panel, and a first frame for installing the light source. A reinforcing member disposed between the first display panel and the first frame, and a tape bonded to the first frame and disposed between the first frame and the reinforcing member. The first adhesive strength of the surface to be bonded is smaller than the second adhesive strength of the surface bonded to the first frame.

  In the display device according to the first aspect, as described above, the first adhesive strength of the surface bonded to the reinforcing member is smaller than the second adhesive strength of the surface bonded to the first frame. When the reinforcing member is disassembled from the first frame, the reinforcing member can be easily disassembled from the surface to which the reinforcing member of the tape is bonded. As a result, since a large force is not required to disassemble the reinforcing member bonded to the first adhesive strength surface side of the tape, a large force (load) is prevented from being applied to the first frame on which the light source is installed. can do. For this reason, since it can suppress that a 1st frame deform | transforms due to a big force (load) being added to a 1st frame, it suppresses that the light source accommodated in a 1st frame is damaged. be able to. As a result, at least the first frame and the light source can be disassembled in a reusable state, so that the display device can be assembled again using the reusable first frame and the light source.

  In the display device according to the first aspect described above, preferably, a flexible printed wiring board disposed on the surface of the reinforcing member, and a pressing portion that is engaged with the first frame and presses the flexible printed wiring board toward the first frame. And a second frame including. If comprised in this way, a 1st reinforcement member may be connected via a flexible printed wiring board so that adhesion with a tape and a reinforcement member which adhere with the 1st adhesion strength small compared with the 2nd adhesion strength may be removed. It can be pressed to the frame side. Thereby, even when the reinforcing member and the first frame are bonded using a tape having an adhesive strength capable of easily disassembling the reinforcing member and the first frame, the reinforcing member and the first frame are bonded. The state can be maintained. As a result, it is possible to suppress the formation of a gap between the reinforcing member that has been removed from bonding and the first frame, and thus it is possible to suppress the entry of foreign matter such as dust from the outside through the gap. . A flexible printed wiring board disposed on the surface of the reinforcing member by using a tape in which the first adhesive strength of the surface bonded to the reinforcing member is smaller than the second adhesive strength of the surface bonded to the first frame Can be disassembled from the first frame together with the reinforcing member, the reinforcing member and the flexible printed wiring board can be easily disassembled from the surface to which the reinforcing member of the tape is bonded. Thereby, since a large force is not required to disassemble the reinforcing member and the flexible printed wiring board bonded to the surface side of the first adhesive strength of the tape, a large force (load) is applied to the flexible printed wiring board. Can be suppressed. Thereby, it can suppress that the wiring formed in a flexible printed wiring board disconnects. As a result, since the flexible printed wiring board can be disassembled in a reusable state, the display device can be assembled again using the reusable flexible printed wiring board.

  In the display device including the second frame including the pressing portion that presses the flexible printed wiring board toward the first frame, the tape preferably includes a single-sided tape having a first adhesive strength of 0. Thus, even when using a single-sided tape that does not bond the tape and the reinforcing member, the reinforcing member is interposed via the flexible printed wiring board so that the pressing portion of the second frame maintains the state where the tape and the reinforcing member are in contact with each other. Can be pressed toward the first frame. As a result, the first frame, the light source, and the flexible printed wiring board can be disassembled in a reusable state while suppressing entry of foreign matter such as dust from the outside.

  In the display device including the second frame including the pressing portion that presses the flexible printed wiring board toward the first frame, preferably, the flexible printed wiring board has a plurality of electronic components mounted thereon, and the second frame The pressing part is formed so as to press an area other than the area where the electronic component of the flexible printed wiring board is mounted. If comprised in this way, a flexible printed wiring board can be pressed to the 1st frame side, without pressing the electronic component mounted in a flexible printed wiring board. As a result, the electronic component mounted on the flexible printed wiring board can be maintained in a contact state between the tape and the reinforcing member without being damaged, and foreign matter such as dust from the outside can be prevented from entering.

  In the configuration in which the pressing portion presses an area other than the area where the electronic component of the flexible printed wiring board is mounted, the flexible printed wiring board is preferably rectangular, and the pressing portion of the second frame is rectangular flexible. It arrange | positions so that 4 sides of the outer side of a printed wiring board may be pressed. If comprised in this way, all the four sides of the outer side of a flexible printed wiring board with high possibility that foreign materials, such as dust from the outside, may invade can be pressed to the 1st frame side. As a result, it is possible to more reliably suppress the entry of foreign matter from the outside.

  In the display device including the second frame including the pressing portion that presses the flexible printed wiring board toward the first frame, preferably, the second frame covers the first electronic component mounted on the flexible printed wiring board. The first shield part of the second frame is formed at a position that is higher than the pressing part by a first height. With this configuration, even when the first electronic component mounted on the flexible printed wiring board is exposed to static electricity applied from the outside of the second frame, the static electricity can be shielded. As a result, while the first shield portion shields static electricity applied to the first electronic component, the flexible printed wiring board is pressed toward the first frame by the pressing portion, and foreign matter such as dust enters from the outside. Can be suppressed.

  In the display device including the second frame including the first shield portion formed at a position higher than the pressing portion by the first height, preferably, the second frame is a second mounted on the flexible printed wiring board. A second shield part formed so as to cover the electronic component, and the second shield part of the second frame is formed at a position higher than the pressing part by a second height smaller than the first height. ing. With this configuration, even when the first electronic component and the second electronic component having different heights are mounted on the flexible printed wiring board, the static electricity applied to the first electronic component and the second electronic component is shielded. can do. As a result, while pressing the static electricity applied to the first electronic component and the second electronic component by the first shield portion and the second shield portion, the flexible printed wiring board is pressed toward the first frame by the pressing portion. Further, it is possible to suppress the entry of foreign matter such as dust from the outside.

  In this case, preferably, the first shield part, the second shield part, and the pressing part of the second frame are formed by at least three stages of drawing. In the process of forming the first shield part, the second shield part and the pressing part by forming the second frame including the first shield part, the second shield part and the pressing part by using the drawing process in this way, The mechanical strength of the second frame can be improved. That is, the first shield part and the second shield part having a function of shielding static electricity from being applied to the first electronic component and the second electronic component, and the flexible printed wiring board are pressed toward the first frame side from the outside. At the same time as forming the pressing portion having a function of suppressing the entry of foreign matter such as dust, the mechanical strength of the second frame can be improved.

  In the display device including the second frame including the pressing portion that presses the flexible printed wiring board toward the first frame side, preferably, the second frame includes an upper surface portion covering the upper surface side of the first frame and the first frame. A side surface portion that covers the side surface side is integrally formed. A first engagement portion is provided on a side surface of the first frame, and a side surface portion of the first frame is provided on a side surface portion of the second frame. A second engagement portion that engages with the first engagement portion is provided. If comprised in this way, a 2nd frame will be reliably engaged with a 1st frame by assembling so that the 1st engaging part of a 1st frame and the 2nd engaging part of a 2nd frame may engage. be able to.

  In the display device according to the first aspect, preferably, the first frame is formed in a frame shape, and the tape is formed so as to surround an edge portion of the frame-shaped first frame. If comprised in this way, the tape formed in frame shape similarly to a frame-shaped 1st frame can be reliably adhere | attached on a frame-shaped 1st frame.

  In the display device including a tape formed so as to surround an edge of the frame-shaped first frame, preferably, the frame-shaped first frame corresponds to a display area of the first display panel. A light shielding sheet having an opening is disposed, and the tape and the light shielding sheet have a function of shielding light emitted from the light source. If comprised in this way, it can suppress that light leaks from places other than the opening part of the light shielding sheet corresponding to the display area of a 1st display panel with a tape and a light shielding sheet.

  The display device according to the first aspect preferably further includes a second display panel housed in the first frame and arranged to face the first display panel, and the light source includes the first display panel and the second display panel. Commonly used for display panels. If comprised in this way, in the display apparatus containing the 1st display panel and 2nd display panel which use one light source in common, at least a 1st frame and a light source can be decomposed | disassembled in a reusable state.

  A portable device according to a second aspect of the present invention is a portable device including a display device for displaying information and an input unit for inputting information, the display device comprising: a first display panel; A light source for supplying light to the first display panel, a first frame for installing the light source, a reinforcing member disposed between the first display panel and the first frame, and bonded to the first frame And a tape disposed between the first frame and the reinforcing member, wherein the first adhesive strength of the surface bonded to the reinforcing member of the tape is higher than the second adhesive strength of the surface bonded to the first frame. small.

  In the portable device according to the second aspect, as described above, a display including a tape in which the first adhesive strength of the surface bonded to the reinforcing member is smaller than the second adhesive strength of the surface bonded to the first frame. By using the apparatus, a portable device that can reuse the first frame and the light source after disassembly can be obtained.

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

  FIG. 1 is a perspective view of an LCD unit (liquid crystal display device) according to an embodiment of the present invention as seen from the sub-panel side, and FIG. 2 is a perspective view of the LCD unit according to the embodiment shown in FIG. FIG. FIG. 3 is an exploded perspective view of the LCD unit according to the embodiment shown in FIG. 4 to 10 are views for explaining details of the LCD unit according to the embodiment shown in FIG. First, the structure of the LCD unit 1 according to the present embodiment will be described with reference to FIGS. In the present embodiment, an example in which the present invention is applied to an LCD unit (liquid crystal display device) 1 which is an example of a display device will be described.

  As shown in FIG. 3, the LCD (Liquid Crystal Display) unit 1 according to the present embodiment shown in FIGS. 1 and 2 includes a main panel 20, a light shielding sheet 53, and two lens sheets 52 in order from the bottom. The diffusion sheet 51, the resin frame 31, the light guide plate 35, the diffusion sheet 36, the two lens sheets 37, the light shielding sheet 38, the single-sided tape 39, the reinforcing plate 40, and the double-sided tapes 41 and 42 , A common FPC (flexible printed wiring board) 43, a sub-panel 10, and a bezel 44. The sub panel 10 and the main panel 20 are examples of the “first display panel” and the “second display panel” of the present invention, respectively.

  As the structure of the sub-panel 10, as shown in FIG. 3, two glass substrates 11a and 11b are arranged to face each other with a liquid crystal layer (not shown) interposed therebetween. A polarizing plate 12a is disposed on the surface of the glass substrate 11a opposite to the glass substrate 11b, and a polarizing plate 12b is disposed on the surface of the glass substrate 11b opposite to the glass substrate 11a. Has been placed. And the area | region enclosed with the broken line in the area | region where the polarizing plate 12a (12b) is arrange | positioned becomes the display area 10a of the subpanel 10, and area | regions other than the display area 10a become the non-display area | region 10b. Further, in a predetermined area in the non-display area 10b of the sub panel 10, a sub panel driving IC (Integrated Circuit) 13 is formed on the surface of the glass substrate 11a on the glass substrate 11b side. Further, the sub panel FPC 14 is connected to the sub panel drive IC 13.

  Further, the structure of the main panel 20 disposed on the lower side of FIG. 3 is the same as the structure of the sub panel 10 described above. That is, in the main panel 20, the two glass substrates 21a and 21b are arranged to face each other with a liquid crystal layer (not shown) interposed therebetween. A polarizing plate 22a is disposed on the surface of the glass substrate 21a opposite to the glass substrate 21b, and a polarizing plate 22b is provided on the surface of the glass substrate 21b opposite to the glass substrate 21a. Has been placed. And the area | region enclosed with the broken line in the area | region where polarizing plate 22a (22b) is arrange | positioned becomes the display area 20a of the main panel 20, and area | regions other than the display area 20a become the non-display area 20b. The display area 20a of the main panel 20 is configured to be larger than the display area 10a of the sub panel 10. Further, in a predetermined region in the non-display region 20b of the main panel 20, a main panel driving IC 23 is formed on the surface of the glass substrate 21a on the glass substrate 21b side. A main panel FPC 24 is connected to the main panel drive IC 23.

  In the LCD unit 1 of the present embodiment, the sub panel 10 is disposed above the resin frame 31, and the main panel 20 is accommodated in the frame of the resin frame 31. The resin frame 31 is an example of the “first frame” in the present invention. 3 and 4, the resin frame 31 includes two long side portions 31a facing each other in the short direction and two short side portions 31b facing each other in the longitudinal direction. It is formed in a frame shape. On the side surfaces 31c of the two long side portions 31a of the resin frame 31, three engaging pieces 31d for a bezel 44 described later are formed so as to protrude outward. Further, as shown in FIG. 5, one engagement piece 31f for the bezel 44 is formed on the side surface 31e of one short side portion 31b of the resin frame 31 so as to protrude outward. The engagement piece 31d and the engagement piece 31f are examples of the “first engagement portion” in the present invention. Further, as shown in FIGS. 3 and 4, two engaging pieces 31 g for the reinforcing plate 40 protrude outwardly at both ends of the side surface 31 e of the other short side portion 31 b of the resin frame 31. Is formed. Further, a positioning pin 31h for a common FPC 43, which will be described later, protrudes to the sub-panel 10 side at a connecting portion between the other short side 31b of the resin frame 31 and the two long sides 31a of the resin frame 31. Is formed. A cutout portion 31 i is formed on the main panel 20 side (lower side) of the other short side portion 31 b of the resin frame 31.

  Further, as shown in FIGS. 3 and 7, an LED FPC 34 in which an LED (light emitting diode) 33 is mounted on the surface of the cutout portion 31 i of the resin frame 31 on the main panel 20 side via a double-sided tape 32. Is glued. The LED 33 is an example of the “light source” in the present invention. In addition, a light guide plate 35 for guiding the light of the LED 33 to the sub panel 10 and the main panel 20 is attached in the resin frame 31. That is, the LED 33 and the light guide plate 35 are commonly used in both the sub panel 10 and the main panel 20.

  As shown in FIGS. 3, 5, and 7, one diffusion sheet 36 and two lens sheets 37 are arranged on the surface of the light guide plate 35 on the sub-panel 10 side in order from the light guide plate 35 side. Has been. The diffusion sheet 36 has a function of diffusing light from the light guide plate 35, and the lens sheet 37 has a function of condensing light from the diffusion sheet 36. A light shielding sheet 38 having an opening 38a (see FIG. 3) is disposed on the surface of the lens sheet 37 on the sub panel 10 side. The light shielding sheet 38 has a function of suppressing light from the LEDs 33 from leaking from areas other than the display area 10a (see FIG. 3) on the sub-panel 10 side. That is, the opening 38 a of the light shielding sheet 38 is provided in an area corresponding to the display area 10 a of the sub panel 10.

  Here, in this embodiment, as shown in FIGS. 5 and 8, a single-sided tape 39 is disposed on the sub-panel 10 side of the frame-shaped resin frame 31. The single-sided tape 39 is an example of the “tape” in the present invention. This single-sided tape 39 includes an adhesive surface 39a that adheres to the resin frame 31 side, and an upper surface 39b that does not have an adhesive function and has an adhesive strength of 0 on the reinforcing plate 40 side described later. And as shown in FIG. 8, the single-sided tape 39 is formed in the frame shape so that the edge part of the frame-shaped resin frame 31 may be enclosed. Specifically, the single-sided tape 39 is framed by a long side portion 39c that adheres to the two long side portions 31a of the resin frame 31 and a short side portion 39d that adheres to the two short side portions 31b of the resin frame 31. Is formed. The long side portion 39c of the single-sided tape 39 is formed on the resin frame 31 in a state where the diffusion sheet 36, the two lens sheets 37, and the light shielding sheet 38 are accommodated in the frame of the resin frame 31 on the sub panel 10 side of the light guide plate 35. The short side portion 39 d of the single-sided tape 39 is bonded to the short side portion 31 b of the resin frame 31. The single-sided tape 39 has a function of shielding light traveling upward (from the sub-panel 10 side) from the LED 33, similarly to the light shielding sheet 38 described above. Therefore, the single-sided tape 39 and the light shielding sheet 38 can prevent light from the LED 33 from leaking from a place other than the display area 10a on the sub-panel 10 side. Moreover, it becomes possible to suppress the intrusion of dust into the resin frame 31 where the LED 33 is installed.

  As shown in FIG. 3, a rectangular reinforcing plate 40 made of stainless steel sheet metal is disposed on the surface of the light shielding sheet 38 and the single-sided tape 39 on the sub panel 10 side. The reinforcing plate 40 has a function of reinforcing a common FPC 43 described later. The reinforcing plate 40 is an example of the “reinforcing member” in the present invention. As shown in FIGS. 3 and 9, openings 40 a and 40 b are formed in the reinforcing plate 40. The opening 40a of the reinforcing plate 40 is provided in an area corresponding to the display area 10a of the sub-panel 10, and the opening 40b of the reinforcing plate 40 is provided in an area corresponding to the sub-panel driving IC 13.

  Further, in the regions corresponding to the two engagement pieces 31 g of the resin frame 31 of the reinforcing plate 40, engagement holes 40 c that engage with the engagement pieces 31 g of the resin frame 31 are formed. In addition, elongated holes 40d are formed in regions corresponding to the two positioning pins 31h of the resin frame 31 of the reinforcing plate 40, respectively. The reinforcing plate 40 is fixed to the resin frame 31 by the two engaging holes 40 c of the reinforcing plate 40 engaging with the three engaging pieces 31 g of the resin frame 31. Further, the positioning pin 31 h of the resin frame 31 protrudes toward the sub-panel 10 through the long hole 40 d of the reinforcing plate 40. The reinforcing plate 40 is formed with a plurality of positioning protrusions 40e that protrude toward the sub panel 10 so as to surround the three sides of the sub panel 10 (glass substrate 11a). The plurality of protruding pieces 40 e of the reinforcing plate 40 have a function of positioning the sub panel 10 with respect to the reinforcing plate 40 so that the display area 10 a of the sub panel 10 is disposed in the opening 40 a of the reinforcing plate 40. .

  A double-sided tape 41 and a double-sided tape 42 are bonded to the surface of the reinforcing plate 40 on the sub-panel 10 side. Specifically, the double-sided tape 41 is bonded to the reinforcing plate 40 so as to surround an area corresponding to the sub panel 10 of the reinforcing plate 40. The double-sided tape 42 is bonded to a region along the outer edge portion of the opening 40 a of the reinforcing plate 40 with a predetermined distance from the double-sided tape 41. Accordingly, as shown in FIGS. 3 and 6, a rectangular common FPC 43 is bonded to the surface of the reinforcing plate 40 on the sub-panel 10 side via the double-sided tape 41, and the opening 40 a of the reinforcing plate 40. A sub-panel 10 is installed on the outer edge of the. Further, the common FPC 43 is commonly used by both the sub panel 10 and the main panel 20. The common FPC 43 is an example of the “flexible printed wiring board” in the present invention.

  The common FPC 43 has an opening 43a, and the opening 43a is provided in a region corresponding to the sub-panel 10. Therefore, the reinforcing plate 40 and the common FPC 43 are bonded via the double-sided tape 41 located in a predetermined area other than the area corresponding to the sub-panel 10. In addition, positioning holes 43b are formed in regions corresponding to the two positioning pins 31h of the resin frame 31 of the common FPC 43, respectively. The common FPC 43 bonded to the reinforcing plate 40 is positioned with respect to the resin frame 31 by the positioning holes 43b of the common FPC 43 and the positioning pins 31h of the resin frame 31. The common FPC 43 is mounted with a connector 43c into which the terminal 34a of the LED FPC 34 is inserted and a connector 43d into which the terminal 14a of the sub-panel FPC 14 is inserted. Further, as shown in FIGS. 1 and 6, the common FPC 43 is also mounted with three connectors 43e in addition to the connector 43c and the connector 43d. Further, the common FPC 43 is mounted with an LED driver chip 43f for controlling the power supply of the LED 33, an image processing chip 43g for image processing, and a plurality of electronic components 43h such as resistors. The image processing chip 43g has the largest thickness among the plurality of electronic components 43h such as resistors, the LED driver chip 43f, and the connectors 43c to 43e, and the surface position of the image processing chip 43g is common. This is the highest position of the FPC 43 on the sub-panel 10 side. The image processing chip 43g is an example of the “first electronic component” in the present invention, and the plurality of electronic components 43h such as resistors is an example of the “second electronic component” in the present invention. The common FPC 43 is connected to the main panel driving IC 23 (see FIGS. 2 and 3) via the main panel FPC 24.

  As shown in FIGS. 3 and 6, the sub-panel 10 is bonded to the reinforcing plate 40 through the opening 43 a of the common FPC 43. Specifically, a region (non-display region 10b) surrounding the display region 10a of the sub panel 10 is bonded to a double-sided tape 42 located in a region along the outer edge of the opening 40a of the reinforcing plate 40. Further, the sub-panel 10 bonded to the reinforcing plate 40 is positioned so that the display region 10 a of the sub-panel 10 is disposed in the opening 40 a of the reinforcing plate 40 by the protruding piece 40 e for positioning the reinforcing plate 40.

  Further, a rectangular bezel 44 made of stainless steel sheet metal is disposed above the sub-panel 10. The bezel 44 is an example of the “second frame” in the present invention. As shown in FIGS. 1 and 6, the bezel 44 has an upper surface portion 44b formed with an opening 44a and four side surface portions 44c formed so as to extend downward from four sides of the upper surface portion 44b. Is formed. Thereby, the part from the side surfaces 31c and 31e of the resin frame 31 to the upper surface can be covered with the upper surface portion 44b and the side surface portion 44c of the bezel 44. Therefore, it is possible to suppress the entry of foreign matter such as dust from the side surface 44c side of the bezel 44. Further, the opening 44 a is provided in a region corresponding to the display region 10 a of the sub panel 10. As a result, the display area 10 a of the sub-panel 10 is exposed from the opening 44 a of the bezel 44. In addition, three engagement holes 44d are formed in each of the two side surfaces 44c facing each other in the short direction of the bezel 44. Further, as shown in FIG. 5, one engagement hole 44e (see FIG. 5) is formed in one of the two side surface portions 44c facing each other in the longitudinal direction of the bezel 44. 3 and FIG. 5, each of the six engagement holes 44d of the side surface portion 44c engages with the six engagement pieces 31d of the side surface 31c of the long side portion 31a of the resin frame 31, and the side surface The bezel 44 is fixed to the resin frame 31 by engaging one engagement hole 44e of the portion 44c with the engagement piece 31f on the side surface 31e of one short side portion 31b of the resin frame 31. The engagement hole 44d and the engagement hole 44e are examples of the “second engagement portion” in the present invention. As shown in FIG. 6, an opening 44 f for exposing each of the connectors 43 c to 43 e and the LED driver chip 43 f mounted on the common FPC 43 is formed on the upper surface portion 44 b.

  In this embodiment, the bezel 44 includes a plurality of electronic components such as connectors 43c to 43e of the common FPC 43, an LED driver chip 43f, an image processing chip 43g, and a resistor, as shown in FIGS. A pressing portion 44g is formed for pressing downward the area other than the area where 43h is mounted. The pressing portions 44g are formed in predetermined areas on the four sides on the outer side of the bezel 44, respectively. In other words, the pressing portions 44 g formed in the predetermined regions on the four sides outside the bezel 44 press all the four sides outside the rectangular common FPC 43. The bezel 44 includes a shield portion 44h formed so as to cover a plurality of electronic components 43h such as resistors, and a shield formed so as to cover the image processing chip 43g having a height higher than the plurality of electronic components 43h. Part 44i. The shield portions 44h and 44i are provided to suppress transmission of static electricity applied from the outside of the bezel 44 to the electronic component 43h and the image processing chip 43g, respectively. The shield part 44h is formed at a position higher than the pressing part 44g that presses the common FPC 43 by the height of the electronic component 43h, and the shield part 44i is equivalent to the height of the image processing chip 43g from the pressing part 44g. It is only formed at a high position. Therefore, the height of the shield part 44h that covers the electronic component 43h is smaller than the height of the shield part 44i that covers the image processing chip 43g. The shield portions 44h and 44i are examples of the “second shield portion” and the “first shield portion” in the present invention, respectively.

  As shown in FIGS. 1 and 6, a cushion 45 is arranged at the outer edge of the opening 44 a of the bezel 44 so that the edge of the opening 44 a of the bezel 44 does not contact the polarizing plate 12 a of the sub-panel 10. A recess 44j is provided for installing the. The pressing portion 44g, the two shield portions 44h and 44i, and the recess 44j are formed by four-stage drawing. In FIG. 10, for the sake of simplification, the diffusion sheet 36 and the lens sheet 37 are represented by one sheet 30, and the diffusion sheet 51 and the lens sheet 52 described later are represented by one sheet 50.

  Further, as shown in FIGS. 3, 5, and 7, in the frame of the resin frame 31, on the surface of the light guide plate 35 on the main panel 20 side, one diffusion sheet 51 in order from the light guide plate 35 side. And two lens sheets 52 are arranged. A rectangular light shielding sheet 53 having an opening 53a (see FIG. 3) is disposed on the surface of the diffusion sheet 51 on the main panel 20 side. The light shielding sheet 53 has a function of suppressing light from the LED 33 from leaking from a region other than the display region 20a on the main panel 20 side. That is, the opening 53 a of the light shielding sheet 53 is provided in an area corresponding to the display area 20 a of the main panel 20.

  As shown in FIG. 3, the outer edge portion of the light shielding sheet 53 is bonded to the two long side portions 31 a and the two short side portions 31 b of the resin frame 31. As shown in FIGS. 3 and 7, the end of the light shielding sheet 53 on the LED FPC 34 side is bonded to the LED FPC 34. As a result, the diffusion sheet 51 and the lens sheet 52 positioned between the light guide plate 35 and the light shielding sheet 53 are fixed to the resin frame 31.

  In the present embodiment, as described above, by using the single-sided tape 39 including the upper surface 39b that does not adhere to the reinforcing plate 40 and the adhesive surface 39a that adheres to the resin frame 31 side, the reinforcing plate 40 and the reinforcing plate 40 can be used. When disassembling the common FPC 43 arranged on the surface from the resin frame 31, the reinforcing plate 40 and the common FPC 43 can be easily disassembled from the single-sided tape 39 bonded to the resin frame 31 side. Thus, since a large force is not required to disassemble the reinforcing plate 40 and the common FPC 43 from the resin frame 31, it is possible to suppress a large force (load) from being applied to the resin frame 31 and the common FPC 43 in which the LED 33 is installed. Can do. For this reason, since it can suppress that the resin frame 31 deform | transforms due to big force (load) being added to the resin frame 31, it suppresses that LED33 accommodated in the resin frame 31 is damaged. be able to. Moreover, since it can suppress that big force (load) is added to the common FPC43, it can also suppress that the wiring formed in the common FPC43 is disconnected. As a result, since the resin frame 31, the LED 33 mounted on the LED FPC 34, and the common FPC 43 can be disassembled in a reusable state, the reusable resin frame 31, the LED 33, and the common FPC 43 are used again. The LCD unit 1 can be assembled.

  In this embodiment, the upper surface 39b of the single-sided tape 39 and the reinforcing plate 40 are provided by providing the bezel 44 that is engaged with the resin frame 31 and includes a pressing portion 44g that presses the common FPC 43 toward the resin frame 31 side. The reinforcing plate 40 can be pressed toward the resin frame 31 via the common FPC 43 so as to suppress the occurrence of a gap between them. Thus, even when the reinforcing plate 40 and the resin frame 31 are bonded using the single-sided tape 39 that allows the reinforcing plate 40 and the resin frame 31 to be easily disassembled, the space between the reinforcing plate 40 and the resin frame 31 can be reduced. It is possible to maintain a state in which no gap is generated. As a result, foreign matters such as dust can be prevented from entering from the outside through the gap.

  In the present embodiment, the common FPC 43 is an area other than the area where the connectors 43c to 43e, the LED driver chip 43f, the image processing chip 43g, and the plurality of electronic components 43h of the rectangular common FPC 43 are mounted. By providing the bezel 44 including the pressing portion 44g that presses the four outer sides, the common FPC 43 can be pressed toward the resin frame 31 without pressing the image processing chip 43g and the like mounted on the common FPC 43. it can. As a result, the image processing chip 43g and the like mounted on the common FPC 43 are not damaged, and the contact state between the single-sided tape 39 and the reinforcing plate 40 is maintained, and foreign matter such as dust from the outside is prevented from entering. can do.

  In this embodiment, the bezel 44 includes a shield portion 44h formed so as to cover the plurality of electronic components 43h mounted on the common FPC 43, and an image processing chip 43g having a height higher than the plurality of electronic components 43h. Even when the image processing chip 43g and the plurality of electronic components 43h mounted on the common FPC 43 are exposed to static electricity applied from the outside of the bezel 44, by forming the shield portion 44i formed so as to cover the Static electricity can be shielded. As a result, while shielding the static electricity applied to the plurality of electronic components 43h and the image processing chip 43g by the shield portions 44h and 44i, the common FPC 43 is pressed to the resin frame 31 side by the pressing portion 44g, and dust from the outside It is possible to suppress the entry of foreign matter such as.

  In the present embodiment, the pressing portion 44g, the two shield portions 44h, the two shield portions 44h and 44i, and the concave portion 44j are formed by four stages of drawing, thereby forming the pressing portion 44g, the two shield portions 44h, and In the process of forming 44i and the recess 44j, the mechanical strength of the bezel 44 can be improved. That is, the shield part 44i and the shield part 44h having a function of shielding static electricity from being applied to the image processing chip 43g and a plurality of electronic components 43h such as resistors, and the common FPC 43 are pressed toward the resin frame 31 so as to be externally applied. A pressing portion 44g having a function of suppressing entry of foreign matter such as dust and a cushion 45 disposed so that the edge portion of the opening 44a of the bezel 44 does not contact the polarizing plate 12a of the sub-panel 10 are provided. Simultaneously with the formation of the recess 44j, the mechanical strength of the bezel 44 can be improved.

  FIG. 11 is a perspective view showing an open state of a mobile phone (mobile device) using the liquid crystal display device according to the embodiment shown in FIG. FIG. 12 is a perspective view showing a closed state of a mobile phone (mobile device) using the liquid crystal display device according to the embodiment shown in FIG. With reference to FIG. 11 and FIG. 12, the structure of the mobile phone (mobile device) 60 according to the present embodiment will be described.

  As shown in FIG. 11, the mobile phone 60 according to the present embodiment includes a main body unit 70 provided with various operation buttons 71 and a built-in microphone 72, and a display unit 80 including an antenna 81 and a built-in speaker 82. ing. The operation button 71 is an example of the “input unit” in the present invention. Further, the main body 70 and the display unit 80 are configured to be mutually foldable by a hinge 61. Further, the LCD unit 1 shown in FIG. 1 is built in the display unit 80, and the display area 20a of the main panel 20 of the LCD unit 1 is disposed on the inner surface side of the display unit 80 so as to be visible. ing. Moreover, as shown in FIG. 12, the display area 10a of the sub panel 10 of the LCD unit 1 is disposed on the outer surface side of the display unit 80 so as to be visible.

  In the present embodiment, as described above, by using the above-described LCD unit 1 for the mobile phone (mobile device) 60, the resin frame 31, the LED 33 mounted on the LED FPC 34 and the common FPC 43 can be reused after disassembly. Can be obtained.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and all modifications within the meaning and scope equivalent to the scope of claims for patent are included.

  For example, in the above-described embodiment, the LCD unit (liquid crystal display device) has been described as an example of the display device. However, the present invention is not limited thereto, and any other display such as an organic EL may be used as long as the display device includes a display panel. You may apply to an apparatus.

  Moreover, in the said embodiment, although the example which uses the single-sided tape containing the adhesion surface adhere | attached on the resin frame side and the upper surface which does not adhere on the reinforcement plate side was shown, this invention is not restricted to this, The reinforcement plate side is shown. A double-sided tape may be used if the adhesive strength to be bonded is smaller than the adhesive strength to be bonded to the resin frame side.

  Moreover, although the example which applies this invention to the display apparatus containing two display panels (sub panel and main panel) was shown in the said embodiment, this invention is not limited to this, The display apparatus containing only one display panel. It is also applicable to.

  Moreover, although the example which applies this invention to a mobile telephone was shown in the said embodiment, this invention is applicable not only to this but portable apparatuses other than a mobile telephone. Examples of portable devices other than mobile phones include portable information terminals (PDA (Personal Digital Assistance)), portable personal computers such as notebook computers, electronic still cameras, portable game devices, and video cameras.

  In the above-described embodiment, the example in which the bezel 44 in which the shield portions 44h and 44i having different heights are formed by drawing is shown, but the present invention is not limited to this, and covers the image processing chip 43g. As long as the height of the shield portion covers the image processing chip 43g and the electronic component 43h such as a resistor, the height may be the same. In this case, in the above embodiment, the shield part, the pressing part, and the concave part are formed by drawing, but the present invention is not limited to this, and the shield part, the pressing part, and the concave part may be formed by other processing methods. .

It is the perspective view which looked at the LCD unit by one Embodiment of this invention from the sub panel side. It is the perspective view which looked at the LCD unit by one Embodiment shown in FIG. 1 from the main panel side. FIG. 2 is an exploded perspective view of the LCD unit according to the embodiment shown in FIG. 1. It is the perspective view which showed the resin frame of the LCD unit by one Embodiment shown in FIG. It is sectional drawing along the 100-100 line of FIG. FIG. 2 is an exploded perspective view of a state in which a bezel is removed from the LCD unit according to the embodiment shown in FIG. 1. It is sectional drawing along the 300-300 line of FIG. FIG. 2 is a perspective view showing a state where a single-sided tape is bonded to a resin frame of the LCD unit according to the embodiment shown in FIG. 1. FIG. 2 is a perspective view showing a reinforcing plate of the LCD unit according to the embodiment shown in FIG. 1. It is sectional drawing along the 200-200 line | wire of FIG. 1 is a perspective view illustrating a mobile phone including an LCD unit according to an embodiment of the present invention. 1 is a perspective view illustrating a mobile phone including an LCD unit according to an embodiment of the present invention.

Explanation of symbols

10 Sub-panel (first display panel)
20 Main panel (second display panel)
31 Resin frame (first frame)
31d, 31f engaging piece (first engaging portion)
33 LED (light source)
38 Shading sheet 39 Single-sided tape (tape)
40 Reinforcement plate (reinforcement member)
43 Common FPC (Flexible Printed Circuit Board)
43g Image processing chip (first electronic component)
43h Electronic component (second electronic component)
44 Bezel (second frame)
44b Upper surface portion 44c Side surface portion 44d, 44e Engagement hole (second engagement portion)
44g Pressing part 44h Shield part (second shield part)
44i Shield part (first shield part)
60 Mobile phone (mobile device)
71 Operation buttons (input section)

Claims (13)

A first display panel;
A light source for supplying light to the first display panel;
A first frame for installing the light source;
A reinforcing member disposed between the first display panel and the first frame;
A tape that is bonded to the first frame and disposed between the first frame and the reinforcing member;
The display device, wherein a first adhesive strength of a surface bonded to the reinforcing member of the tape is smaller than a second adhesive strength of a surface bonded to the first frame. A flexible printed wiring board disposed on the surface of the reinforcing member;
The display device according to claim 1, further comprising: a second frame that is engaged with the first frame and includes a pressing portion that presses the flexible printed wiring board toward the first frame.   The display device according to claim 2, wherein the tape includes a single-sided tape whose first adhesive strength is zero. A plurality of electronic components are mounted on the flexible printed wiring board,
4. The display device according to claim 2, wherein the pressing portion of the second frame is formed so as to press an area other than an area where the electronic component of the flexible printed wiring board is mounted. The flexible printed wiring board is rectangular,
The display device according to claim 4, wherein the pressing portion of the second frame is disposed so as to press four sides on the outer side of the rectangular flexible printed wiring board. The second frame includes a first shield part formed so as to cover a first electronic component mounted on the flexible printed wiring board,
The display device according to claim 2, wherein the first shield portion of the second frame is formed at a position higher than the pressing portion by a first height. The second frame further includes a second shield part formed so as to cover the second electronic component mounted on the flexible printed wiring board,
The display device according to claim 6, wherein the second shield part of the second frame is formed at a position higher than the pressing part by a second height that is smaller than the first height.   The display device according to claim 7, wherein the first shield part, the second shield part, and the pressing part of the second frame are formed by at least three stages of drawing. In the second frame, an upper surface portion covering the upper surface side of the first frame and a side surface portion covering the side surface side of the first frame are integrally formed,
A first engagement portion is provided on a side surface of the first frame,
The side surface portion of the second frame is provided with a second engagement portion that engages with the first engagement portion on the side surface of the first frame. Display device. The first frame is formed in a frame shape,
The display device according to claim 1, wherein the tape is formed so as to surround an edge portion of the frame-shaped first frame. A light shielding sheet having an opening corresponding to the display area of the first display panel is disposed in the frame of the frame-shaped first frame,
The display device according to claim 10, wherein the tape and the light shielding sheet have a function of shielding light emitted from the light source. A second display panel housed in the first frame and disposed to face the first display panel;
The display device according to claim 1, wherein the light source is used in common for the first display panel and the second display panel. A portable device including a display device for displaying information and an input unit for inputting information,
The display device
A first display panel;
A light source for supplying light to the first display panel;
A first frame for installing the light source;
A reinforcing member disposed between the first display panel and the first frame;
A tape that is bonded to the first frame and disposed between the first frame and the reinforcing member;
The first adhesive strength of the surface bonded to the reinforcing member of the tape is smaller than the second adhesive strength of the surface bonded to the first frame.

Images