JP2009239670A - Display device for mobile terminal and mobile terminal equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a display device for mobile terminal, which is easy in assembly, thin in the thickness of a product and effective in protection against dust as well as waterproofing effect. <P>SOLUTION: The display device 2 includes a flat plate type liquid crystal display unit 8. The liquid crystal display unit 8 is inserted into a rear side cabinet 11 under a condition that a substrate 10b for display is pinched between the flat plate type bottom plate 11a of the rear side cabinet 11 and the rear surface of the liquid crystal display unit 8. The liquid crystal display unit 8 is covered with a front side panel 15 under air-tight condition from the front surface side of the rear side cabinet 11, into which the liquid crystal display unit 8 is inserted. Further, the rear side cabinet 11 is covered with a rear side cover 17 from the rear side thereof. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device for a mobile terminal and a mobile terminal including the display device.

  Conventionally, the structure of a housing including a display unit of a portable terminal has a frame having a display unit fitting concave part on the front side and a substrate fitting concave part on the back side for both positioning of the display unit and the display unit substrate. The display unit and the liquid crystal substrate are fitted to each other, and the frame is coupled so as to be wrapped by the back side cabinet and the front side cabinet with the display unit window.

  For example, in Patent Document 1, the structure of a portable folding electronic device having an upper part and a lower part folded in two at a hinge part and an LCD (liquid crystal display) on the upper part is a housing formed of resin. A body, and an LCD frame formed of a rigid material on which an LCD is attached on the front side and a printed wiring board is attached on the back side. The hinge part is rigid in the space of the cylinder part of the upper hinge part when the cylindrical part of the upper hinge part of the upper part and the cylinder part of the lower hinge part of the lower part are joined by inserting a rod-like hinge unit. By including the internal reinforcement part of the LCD frame made of material, design constraints can be reduced and costs can be reduced without causing both internal flexure of the printed wiring board and insufficient strength of the hinge part. I have to.

Further, in Patent Document 2, a substrate protrusion that extends to the left and right in the width direction of the LCD flexible substrate is provided, and an LCD flexible substrate receiving surface that contacts the lower surface of the substrate protrusion of the LCD flexible substrate is provided on the LCD frame. When the lower surface of the substrate protruding portion of the substrate contacts the LCD flexible substrate receiving surface, the upper surface of the substrate protruding portion and the LCD flexible substrate becomes a flat surface continuous with the surface of the cushion abutting portion. As a result, dust can be secured in the space between the screen and the LCD main body only with the dust cushion, and at the same time, it also serves as a shock absorbing cushion.
JP 2003-31962 A JP 2005-189499 A

  However, in a conventional display device for a portable terminal, if a frame having a display portion fitting recess on the front side and a board fitting recess on the back side is interposed, the thickness of the casing increases, and the LCD and flexible frame are attached to the frame. When the board is attached, there are irregularities on the connector and circuit parts, etc., and it is caught on the assembly work table, jigs, people's clothes etc. until the front cabinet and back cabinet are joined, and the assembly time is lost or the parts are damaged There is a risk of Further, when the assembly is carried over to the next day in the middle of the assembly and left unattended for a long time, there is a problem that dust accumulates on the connector, circuit components, and the like. Furthermore, when the display unit and the display substrate are attached to both sides of the frame, the frame must be inverted and coupled, so that the assembly work is troublesome.

  The present invention has been made in view of the above points, and an object of the present invention is to make a display device of a portable terminal easy to assemble, have a thin product, and have a dustproof and waterproof effect. is there.

  In order to achieve the above object, in the present invention, the display unit and the display substrate are covered with a front panel, a back cabinet and a back cover in a sealed manner.

Specifically, in the first invention,
Targeting mobile terminal display devices with a flat display,
The display device of the mobile terminal is
A back side cabinet having a flat bottom plate, and in which the display unit is fitted with a display substrate sandwiched between the bottom plate and the back surface of the display unit;
A front panel that covers the display unit from the surface side of the back cabinet fitted in the display unit;
A back cover for covering the back cabinet from the back side.

  According to the above configuration, since the display unit is wrapped in the front panel and the back cabinet with the display substrate sandwiched on the back side, the display unit is fitted in the conventional front side recess, and the display is displayed in the back side recess. An uneven frame into which the circuit board is fitted is not required, the thickness is reduced, and components such as the substrate are covered by the back cabinet, so that problems such as component catching and dust accumulation do not occur. Furthermore, when attaching the display unit and the display substrate to the back side cabinet, it is not necessary to reverse the back side cabinet, so that the assembling work is easy.

In the second invention, in the first invention,
The front panel covers the display unit in a sealed manner.

  According to said structure, since the display part is covered by the front side panel, the back side cabinet, and the back side cover in the airtight state, it is excellent in a dustproof and waterproof effect.

In the third invention, in the first or second invention,
The back cabinet is a resin molded product in which a metal plate is insert-molded.

  According to said structure, the intensity | strength of a back side cabinet increases with the inserted metal plate, and intensity | strength is ensured, making the whole thickness thinner than the conventional frame. Moreover, since the through-hole for positioning the metal plate at the time of insert molding is covered with the back side cover, it is excellent in dust resistance and waterproofness.

In the fourth invention, in the third invention,
The said back side cover is a metal molded product, and has played the role of the antenna.

  According to said structure, intensity | strength increases by covering with the back side cover of a metal molded product, and since a radio wave etc. can be received with the back side cover with a large area, receiving efficiency is good.

In the fifth invention, in the fourth invention,
The said back side cover is affixed on the said back side cabinet by the back side double-sided tape in the airtight state.

  According to said structure, since the back side cover is closely_contact | adhered to the back side cabinet with the back side double-sided tape, a dustproof and waterproof effect is acquired.

In a sixth invention, in the fifth invention,
The back side double-sided tape has a plurality of through holes for conduction,
In the through hole for conduction, a conductive gasket for conducting the metal plate inserted in the back cabinet and the back cover is sandwiched between the metal plate and the back cabinet.

  According to said structure, since the signal received with the back side cover is efficiently conduct | electrically_connected with the metal plate of a back side cabinet by a conductive gasket, reception performance is good.

In a seventh invention, in any one of the first to sixth inventions,
The front panel is affixed to the back cabinet in a sealed manner with a frame-shaped front double-sided tape.

  According to said structure, since a front side panel adheres easily to a back side cabinet with a front side double-sided tape, it is excellent in dust resistance and waterproofness.

In the eighth invention,
A display device according to any one of the first to seventh inventions;
Locking claws projecting inward are formed at a plurality of locations on the inner peripheral surface of the back cabinet, and the periphery of the display unit is locked to the locking claws.

  That is, when the display unit and the display substrate are attached to both sides of the frame as in the conventional case, since the tips of the locking claws provided on the display unit and the display substrate project from both sides of the frame, the thickness is It becomes thick. However, according to said structure, since the latching claw provided in the back side cabinet protrudes inside and does not protrude from the thickness direction of a back side cabinet, the thickness does not become thick.

In the ninth invention,
A display device according to any one of the first to eighth inventions;
A mobile phone including a mobile terminal body to which the display device is connected.

  According to the above configuration, it is possible to obtain a mobile phone including a display device that is excellent in dust resistance and waterproofness, is thin, has no catch, and is easy to assemble.

In a tenth aspect, in the ninth aspect,
The mobile phone has a dustproof and waterproof structure.

  According to the above configuration, it is possible to obtain a mobile phone that is thin and easy to assemble and has an excellent dustproof and waterproof effect.

  As described above, according to the present invention, the display unit and the display substrate are hermetically covered with the front panel and the back cabinet, and the back side is covered with the back cover. When assembling, there is no need to reverse the back cabinet, and a portable terminal that is easy to assemble and is thin and excellent in dust and water resistance can be obtained.

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

  1 and 2 show an open state and a closed state of a foldable mobile phone provided with a display device according to an embodiment of the present invention, and FIG. 3 shows an exploded perspective view of the display device. Fig. 4 shows the back side cabinet with the liquid crystal display attached, as seen from the front side, and Fig. 5 shows the back side cabinet with the liquid crystal display, antenna flex, conductive gasket, etc., seen from the back side. Show. FIG. 6 shows the back cabinet viewed from the front side.

  As shown in FIGS. 1 and 2, a mobile phone 1 as a mobile terminal includes a first housing 3 having a display device 2 and a second housing 5 as a mobile terminal body having an operation unit 4. It has. The first housing 3 and the second housing 5 are connected to each other so as to be foldable around the hinge portion 6. A telephone receiver 7 is built in the upper side of the first housing 3.

  As shown in FIGS. 3 and 4, the display device 2 includes a liquid crystal display unit 8 as a display unit. The liquid crystal display unit 8 has a flat plate shape, and is connected to a flexible flexible substrate 10 a and a flat plate display substrate 10 b via a relay flexible portion 9, and is disposed on the back side of the liquid crystal display unit 8. ing. That is, the liquid crystal display unit 8 is fitted on the flat bottom plate 11a of the back cabinet 11 so that the flexible substrate 10a and the display substrate 10b are sandwiched between the back surface thereof. A cushion 12 and a protective sheet 13 are inserted between the relay flexible part 9 and the liquid crystal display part 8. The relay flexible part 9 has a tip part 9b extending to the second housing 5 side rather than the silicon part 9a for dustproofing and waterproofing.

  As shown in FIGS. 5 and 6, the back cabinet 11 is made of a resin molded product in which a metal plate 14 made of flat stainless steel or the like is insert-molded, and the metal plate 14 is exposed on the back surface side. The back cabinet 11 has, for example, two pairs of molding positioning holes 11b for positioning the metal plate 14 during insert molding. Further, for example, seven cavity side conduction holes 11c are formed in a dispersed manner, and the metal plate 14 is exposed on the surface side through the cavity side conduction holes 11c. A receiver recess 11d is formed on the upper side of the back cabinet 11 (opposite to the hinge portion 6), and the receiver 7 is inserted into the receiver recess 11d. The receiver 7 has a rectangular frame-shaped waterproof sheet 7a attached to the upper surface thereof, and is held by a receiver press 7b. As shown in FIG. 3, the liquid crystal display unit 8 is fitted on the bottom plate 11 a of the back side cabinet 11, and the transparent front side panel 15 is fitted with the upper side of the relay flexible part 9 being pressed with a connector presser 14 made of stainless steel, for example. Yes.

  As shown in FIGS. 6 and 7, locking claws 11 f protruding inward are formed at a plurality of locations on the inner peripheral surface of the back cabinet 11. On the other hand, the back side of the liquid crystal display unit 8 is covered with a reinforcing stainless cover 8a. The liquid crystal display unit 8, the flexible substrate 10 a, and the display substrate 10 b are configured such that the back side of the liquid crystal display unit 8 is engaged with the engaging claw 11 f of the back side cabinet 11 by engaging the periphery of the reinforcing stainless cover 8 a with the back side cabinet. 11 is fitted. The display substrate 10b is positioned in a recess on the bottom plate 11a of the back cabinet 11 so as not to rattle. For this reason, when the display unit and the display substrate are attached to both sides of the frame as in the prior art, the tips of the locking claws provided on the display unit and the display substrate respectively protrude from both sides of the frame. Although the thickness is increased by that amount, the locking claw 11f provided in the back cabinet 11 protrudes inward and does not protrude from the thickness direction of the back cabinet 11, so that the thickness does not increase. . The peripheral edge of the liquid crystal display unit 8 may be locked by the locking claw 11f.

  Further, in this way, when the liquid crystal display unit 8, the flexible substrate 10a, and the display substrate 10b are assembled, they are fitted as they are from the front side of the back cabinet 11, so that the reversing operation of the back cabinet 11 is not required and the assembly is extremely performed. The structure is easy to work.

  The front panel 15 is made of, for example, acrylic resin, and is adhered to the back cabinet 11 with a frame-shaped front double-sided tape 16 in a sealed manner. The front panel 15 is fitted into the panel recess 11e of the back cabinet 11 from the front surface side and bonded, and the receiver 7 is fitted into the receiver recess 11d so that the overall shape is less uneven.

  The hinge portion 6 is for decoration that covers a pair of boss portions 6a on the lower side of the back cabinet 11, a pair of metal hinge members 6b having elastic members, and a back side of the boss portion 6a. Hinge cover 6c.

  The back side cabinet 11 is covered with a plate-like back side cover 17 in a sealed manner from the back side, and the molding positioning hole 11b is closed. The back side cover 17 is a metal molded product made of, for example, a stainless alloy, and serves as an antenna and a decoration. The back side cover 17 is attached to the back side cabinet 11 in a sealed manner with a rectangular back side double-sided tape 18.

  The back side double-sided tape 18 has, for example, seven conduction through holes 18a corresponding to the cavity side conduction holes 11c, and the metal plate 14 inserted into the back side cabinet 11 is inserted into these conduction through holes 18a. A conductive gasket 19 is interposed between the back cover 17 and the back cover 17. In addition, the antenna flex 20 is attached to the lower end side (the boss portion 6a side) of the back cabinet 11 by a rectangular frame-shaped waterproof tape 21, and is pressed by the antenna cushion 22 on the back side. As shown in FIGS. 3 and 5, the antenna flexible cable 20 passes through the antenna through-hole 18 b of the back-side double-sided tape 18 and is grounded to the back-side cover 17, and its tip 20 a is the main body in the second housing 5. It is electrically connected to a substrate (not shown). Moreover, the display substrate 10b and the main substrate are electrically connected by connecting the leading end 9b of the relay flexible section 9 to the main substrate. The side wall of the back side cabinet 11 from which the front end portion 9b protrudes is sealed with a silicon portion 9a.

  Thus, the display device 2 is sealed by the front panel 15, the back cabinet 11, and the back cover 17, and has a dustproof and waterproof structure.

  And since the liquid crystal display unit 8 is sandwiched between the front panel 15 and the back cabinet 11 with the display substrate 10b sandwiched on the back side, the liquid crystal display unit 8 is fitted into the conventional front side recess. In addition, there is no need for an uneven frame in which the display substrate 10b is fitted in the recess on the back side, the thickness is reduced, and components such as the substrate are covered with the back cabinet 11, so The problem of deposition does not occur.

  Further, the strength is increased by covering with the back-side cover 17 of a metal molded product, and since the back-side cover 17 having a large area can receive TV radio waves and the like, the reception efficiency is good.

  Further, the inserted metal plate 14 increases the strength of the back cabinet 11 and secures the strength while reducing the overall thickness of the conventional frame.

  Further, since the back side cover 17 is in close contact with the back side cabinet 11 with the back side double-sided tape 18, the molding positioning hole 11b is closed to obtain a dustproof and waterproof effect.

  Further, since the signal received by the back cover 17 is efficiently conducted to the metal plate 14 of the back cabinet 11 by the conductive gasket 19, the reception performance is good.

  Furthermore, since the front panel 15 is easily adhered to the back cabinet 11 by the front double-sided tape 16, it is excellent in dust resistance and waterproofness.

-Effect of the embodiment-
Therefore, according to the display device 2 of the portable terminal according to the present embodiment, the liquid crystal display unit 8 and the display substrate 10b are hermetically covered with the front panel 15 and the back cabinet 11, and the back side is covered with the back cover 17. As a result, when the liquid crystal display unit 8 and the display substrate 10b are assembled, the reverse operation of the back cabinet 11 is not required, and the cellular phone 1 that is easy to assemble and has a small thickness and excellent water and dust resistance can be obtained.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above embodiment, the display device 2 is provided in the first housing 3 and the operation unit 4 is provided in the second housing 5, but a similar display device is provided in the second housing 5. Also good.

  In the above embodiment, the mobile terminal is a mobile phone, but it may be any device having a display device such as a PHS, PDA, PC, mobile tool, electronic dictionary, calculator, copying machine, game machine, or the like.

  In the said embodiment, although the display apparatus 2 is provided with the liquid crystal display, you may have an organic EL display. An organic EL display emits light by itself, consumes less power, has a wider viewing angle than a liquid crystal display, and does not require a backlight, and thus can be thinned. On the other hand, a liquid crystal display is cheaper and has a longer life than an organic EL display.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

It is a perspective view which shows the open state of the mobile telephone provided with the display apparatus concerning embodiment of this invention. FIG. 2 is a view corresponding to FIG. 1 showing a closed state of the mobile phone. It is a disassembled perspective view of a display apparatus. It is the perspective view which looked at the back side cabinet with which the liquid crystal display part was mounted | worn from the front side. It is the perspective view which looked at the back side cabinet where the liquid crystal display part, the antenna flexible, the conductive gasket, etc. were affixed from the back side. It is the perspective view which looked at the back side cabinet from the front side. It is the VII-VII sectional view taken on the line of FIG.

Explanation of symbols

1 Mobile phone (mobile terminal)
5 Second housing (mobile terminal body)
8 Liquid crystal display part (display part)
10b Display substrate 11 Back cabinet 11a Bottom plate 11f Locking claw 14 Metal plate 15 Front panel 16 Front side double-sided tape 17 Back side cover 18 Back side double-sided tape 18a Conductive through hole 19 Conductive gasket

Claims (10)

A display device for a mobile terminal including a flat display unit,
A back side cabinet having a flat bottom plate, and in which the display unit is fitted with a display substrate sandwiched between the bottom plate and the back surface of the display unit;
A front panel that covers the display unit from the front side of the back cabinet into which the display unit is fitted;
A display device for a portable terminal, comprising: a back cover that covers the back cabinet from the back side. The display device of the portable terminal according to claim 1,
The display device for a portable terminal, wherein the front panel covers the display unit in a sealed manner. In the display device of the portable terminal according to claim 1 or 2,
The back side cabinet is a resin molded product in which a metal plate is insert-molded. The display device of the portable terminal according to claim 3,
The display device for a portable terminal, wherein the back cover is a metal molded product and serves as an antenna. In the display device of the portable terminal according to claim 4,
The display device for a portable terminal, wherein the back side cover is attached to the back side cabinet in a sealed manner with a back side double-sided tape. In the display device of the portable terminal according to claim 5,
The back side double-sided tape has a plurality of through holes for conduction,
The conductive through hole is sandwiched between the metal plate and the back cabinet, and a conductive gasket for conducting the metal plate inserted in the back cabinet and the back cover. Display device for portable terminal. The display device of the mobile terminal according to any one of claims 1 to 6,
The display device of a mobile terminal, wherein the front panel is hermetically attached to the back cabinet with a frame-shaped front double-sided tape. The display device of the portable terminal according to any one of claims 1 to 7,
A display device for a portable terminal, wherein a plurality of locking claws projecting inward are formed on an inner peripheral surface of the back side cabinet, and a peripheral edge of the display unit is locked to the locking claws. . A display device for a portable terminal according to any one of claims 1 to 8,
A portable terminal comprising: a portable terminal body to which the display device is connected. The mobile terminal according to claim 9, wherein
A portable terminal characterized by being a dustproof and waterproof cellular phone.

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