JP2002304137A - Display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display advantageous for thinning its body. SOLUTION: In a display device 1 having display parts on the surface side of its body and its back side, a first display device 11, which is arranged on the surface side of the body, a first light guide plate 12 which is arranged on the back side of the first display device 11, a second display device 16 which is arranged on the back side of the body, a second light guide plate 15 which is arranged on the back side of the second display device 16 and a holder 13 having a first support part supporting the first display 11 and the first light guide plate 12 on its one surface and a second support part supporting the second display 16 and the second light guide plate on the other surface confronting the a forementioned are packaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device such as a portable terminal device having a display on a front surface and a rear surface, and more particularly, to a display device advantageous for thinning.

[0002]

2. Description of the Related Art In recent years, portable terminal devices have become so popular that people who have them are more rare than those who do not have them, and competition is intensifying. Portable terminal devices that are becoming smaller, lighter and thinner and have added value are increasing. As one of them, a portable terminal device equipped with a small display on the back has begun to be put on the market in order to be able to obtain information such as date, time and communication status without opening the foldable portable terminal device.

[0003]

However, in order to mount a display on the back surface, it is necessary to mount an LCD and a light guide plate, and further, a space for securing the strength of the main body of the apparatus is required. It is becoming very difficult to make the main body thinner.

A conventional mounting structure is such that displays (LCD) are provided on both sides of a printed circuit board 114 as shown in FIGS.
Light guide plates 112 and 116, and each LCD 11
1, 117 and holder 1 for holding light guide plates 112, 116
13, 115 were required, and it was very difficult to reduce the thickness.

An object of the present invention is to provide a display device which is advantageous in reducing the thickness of the main body.

[0006]

According to a first aspect of the present invention, there is provided a display device having a display portion on a front side of a main body and a rear side thereof, wherein a first display device arranged on the front side of the main body; A first light guide plate arranged on the back side of the first display device, a second display device arranged on the back side of the main body, and a second light guide plate arranged on the back side of the second display device; One surface has a first support portion that supports the first display device and the first light guide plate, and the other surface facing the one surface has the second display device and the second light guide plate.
And a holder having a second support for supporting the light guide plate.

In a second aspect of the present invention, the second aspect
The light guide plate is supported by the holder at a position where the light guide plate is entirely or partially overlapped with the first light guide plate when viewed from a direction perpendicular to the display surface, and the entire region where the first light guide plate and the second light guide plate overlap with each other Alternatively, no member is interposed in a part.

In the display device, it is preferable that a plate surface of the second light guide plate is supported by the holder such that the plate surface contacts the plate surface of the first light guide plate entirely or partially.

[0009] In a third aspect of the present invention, in the display device, the second display device and the second light guide plate are arranged such that the first display device and the first light guide plate are viewed from a direction perpendicular to a display surface. And the holder is supported by the holder at a position that does not overlap with the holder, and the holder has a shape in which at least a surface of the other surface on which the second display device and the second light guide plate are mounted is depressed toward the one surface. There is a feature.

[0010] In the display device, the display device is preferably an LCD.

Further, in the display device, the holder is arranged on one surface or another surface of the holder, and is not arranged between the holder and the first display device or the second display device. It is preferable to provide a wiring circuit having a space for the above.

In the display device, it is preferable that the wiring circuit is a flexible wiring circuit.

[0013] In the display device, it is preferable that the display device is a foldable portable terminal device.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a display device having a display section on the front side of a main body and on the back side thereof, a first display device (11 in FIG. 3) arranged on the front side of the main body, First light guide plate arranged on the back side (12 in FIG. 3)
A second display device (16 in FIG. 3) arranged on the back side of the main body, a second light guide plate (15 in FIG. 3) arranged on the back side of the second display device, It has a first support portion (17 in FIG. 3) for supporting the first display device and the first light guide plate, and has the second display device and the second light guide plate on another surface opposite to the one surface. The holder (1 in FIG. 3) having the second support portion (18 in FIG. 4) for supporting
3), and the second light guide plate is supported by the holder at a position where the second light guide plate entirely or partially overlaps with the first light guide plate when viewed from a direction perpendicular to the display surface, and the second light guide plate is supported by the second light guide plate.
The plate surface of the light guide plate is supported by the holder such that the plate surface of the first light guide plate is entirely or partially in contact with the plate surface of the first light guide plate.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of a portable terminal device according to an embodiment of the present invention. FIG. 2 is an external perspective view of internal components mounted on the portable terminal device according to one embodiment of the present invention. FIG. 3 is an exploded perspective view of an internal component mounted on a portable terminal device according to an embodiment of the present invention when a front LCD is faced up. FIG. 4 is an exploded perspective view of the internal component mounted on the portable terminal device according to the embodiment of the present invention when the rear LCD is facing upward. FIG. 5 is a cross-sectional view of the portable terminal device according to one embodiment of the present invention when the display side housing is crossed in the vicinity of the center.

Referring to FIG. 1, a portable device terminal 1 is a foldable portable terminal device, and a display-side casing 2 and an operation-side casing 3 are connected via a hinge 4. In FIG. 1, the portable terminal device is in a folded state, and a rear display unit 5 is provided near the center of the rear surface of the housing 2 on the display side.

Referring to FIG. 2, an internal component 10 is mounted on a display-side housing in the order of a front LCD, a front light guide plate, a holder, an FPC, a rear light guide plate, and a rear LCD. FIG. 2 shows the internal component 10 as viewed from the rear LCD 16 side. An FPC 14 is disposed on the holder 13, and the FPC 14 has a space near the center thereof for passing a frame-shaped support portion of the holder. A rear LCD 16 is fitted into the frame-shaped support portion.

Referring to FIG. 3 and FIG.
Are front LCD 11, front side light guide plate 12, holder 13,
The FPC 14, the rear light guide plate 15, and the rear LCD 16 are stacked in this order.

The front LCD 11 and the rear LCD 16 are liquid crystal displays.
In addition, a plate-shaped display device such as a thin film transistor (TFT) or a plasma display panel (PDP) may be used.

Front light guide plate 12 and rear light guide plate 15
Is a component of a backlight disposed between the front LCD 11 or the rear LCD 16 and the holder 13.

The holder 13 has a front LCD 11 on one plate surface.
And frame-shaped support portion 17 for supporting front side light guide plate 12
And the rear LCD 16 and the rear light guide plate 1
5 has a frame-shaped support portion 18 for supporting the same. The holder 13 is provided on the rear side light guide plate 1 when viewed from the vertical direction of the display surface.
5 supports the front LCD 11, the front light guide plate 12, the rear LCD 16, and the back light guide plate 15 at a position where the front light guide plate 12 partially (or may be entirely) overlapped with the front light guide plate 12, Support the front LCD 11, the front light guide plate 12, the rear LCD 16, and the rear light guide plate 15 such that the plate surface of the front light guide plate 12 partially (or entirely) contacts the plate surface. That is, the holder 13
Has a void in a region where the rear light guide plate 15 and the front light guide plate 12 overlap. Furthermore, the holder 13 has a space except for the front frame-shaped support portion 17 even in the region of the plate surface of the rear light guide plate 15 where the rear light guide plate 15 does not overlap with the front light guide plate 12.

The FPC 14 includes a front LCD 11 and a rear face L
It is a flexible printed circuit (flexible printed circuit) that is electrically connected to each of the CDs 16, and the holder 13
There is a space 19 for avoiding the frame-shaped support portion 18 on the back side of. The FPC 14 includes a holder 13 and a rear light guide plate 15.
Does not intervene between

Referring to FIG. 5, the front LCD 11 and the front light guide plate 1 as internal components are provided in the internal space of the housing combined by the front case 20 and the rear case 30.
2. The holder 13, the FPC 14, the rear light guide plate 15, and the rear LCD 16 are stacked and mounted in this order.
The front LCD 11 side of the internal component is disposed on the front window 21 side of the front case, and the rear LCD 16 side of the internal component is disposed on the rear window 31 side of the front case.

In this embodiment, an FPC is used in place of the conventional printed circuit board, the FPC in the rear LCD mounting area is made blank (vacant space), and the FPC is provided between the light guide plate of the front display and the light guide plate of the rear display. And the like are mounted without sandwiching them, and the LCD and the light guide plate holder on both sides are shared and mounted, so that it is possible to reduce the thickness and weight.

Next, another embodiment will be described with reference to the drawings. FIG. 6 is a cross-sectional view of a mobile terminal device according to another embodiment of the present invention when the vicinity of the center of a display-side housing is vertically cut.

A front LCD and a rear LCD as shown in FIG.
Are implemented with their positions completely shifted so that they do not overlap. That is, when the holder is viewed from a direction perpendicular to the plate surface, the rear LCD is provided on the back of the holder on which the front LCD is disposed.
Is not provided, the holder is recessed to the front side in the dead space existing around the front LCD, and the back LC is inserted into the recess.
Insert D. Thereby, the substantial thickness is sufficient for the LCD, the light guide plate, the holder, the FPC, and the case, so that the thickness can be further reduced.

[0027]

According to the present invention, the light guide plate of the front display and the light guide plate of the rear display are not sandwiched by a printed circuit board, and the holder for supporting the display (LCD) and the light guide plate is shared on both sides of the display. By mounting them back-to-back, the thickness of the device body can be reduced.

Further, if the front display and the rear display are mounted so as not to overlap with each other, the thickness can be further reduced.

Further, since the holder for supporting the LCD can be shared (single), it is useful for reducing the number of parts.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a portable terminal device according to an embodiment of the present invention.

FIG. 2 is an external perspective view of internal components mounted on the portable terminal device according to one embodiment of the present invention.

FIG. 3 is an exploded perspective view of an internal component mounted on the portable terminal device according to one embodiment of the present invention when a front LCD is faced up;

FIG. 4 is an exploded perspective view of an internal component mounted on the portable terminal device according to one embodiment of the present invention, with a rear LCD facing upward.

FIG. 5 is a cross-sectional view of the portable terminal device according to one embodiment of the present invention when the display side housing is traversed in the vicinity of the center.

FIG. 6 is a cross-sectional view of a portable terminal device according to another embodiment of the present invention when the vicinity of the center of a display-side housing is vertically cut.

FIG. 7 is an external perspective view of internal components mounted on a portable terminal device according to a conventional example.

FIG. 8 is an exploded perspective view of an internal component mounted on a portable terminal device according to an example of the related art, with a front LCD facing upward.

FIG. 9 is an exploded perspective view of an internal component mounted on a portable terminal device according to an example of the related art, with a rear LCD facing upward.

FIG. 10 is a cross-sectional view of a portable terminal device according to an example of the related art when the display device is traversed near the center of a display-side housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mobile device terminal 2 Display side housing 3 Operation side housing 4 Hinge part 5 Rear display part 10 Internal components 11 Front LCD 12 Front light guide plate 13 Holder 14 FPC 15 Rear light guide plate 16 Rear LCD 17 Frame support Part (front side) 18 Frame-shaped support part (rear side) 19 Empty space 20 Front case 21 Front window 30 Rear case 31 Rear window 111 Front LCD 112 Front light guide plate 113 Front holder 114 Printed circuit board 115 Rear holder 116 Rear guide Light plate 117 Rear LCD 120 Front case 121 Front window 130 Rear case 131 Rear window

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 9/00 324 G09F 9/00 324 5G435 9/35 9/35 F-term (Reference) 2H088 EA22 HA05 HA30 MA16 2H089 HA21 HA33 HA40 QA11 TA20 2H091 FA23X FA23Z FD06 FD13 LA11 LA13 2H092 GA50 GA53 NA27 PA05 5C094 AA15 BA43 DA08 HA08 5G435 AA18 BB12 BB15 CC09 EE47 LL07

Claims (8)

[Claims] 1. A display device having a display section on a front side and a rear side of a main body, wherein a first display device disposed on a front side of the main body, and a first display device disposed on a rear side of the first display device. A light guide plate, a second display device arranged on the back side of the main body, a second light guide plate arranged on the back side of the second display device, and the first display device and the first light guide on one surface. Mounting a holder having a first support portion for supporting the light plate and having a second support portion for supporting the second display device and the second light guide plate on another surface opposite to the one surface; A display device characterized by the above-mentioned. 2. The second light guide plate is supported by the holder at a position where the second light guide plate completely or partially overlaps with the first light guide plate when viewed from a direction perpendicular to a display surface, and the first light guide plate and the second light guide plate are supported by the holder. 2. The display device according to claim 1, wherein no member is interposed in the whole or a part of the region where the light guide plate overlaps. 3. The holder according to claim 2, wherein the plate surface of the second light guide plate is entirely or partially in contact with the plate surface of the first light guide plate and supported by the holder. Display device. 4. The second display device and the second light guide plate are supported by the holder at a position where the first display device and the first light guide plate do not overlap when viewed from a direction perpendicular to a display surface, 2. The display according to claim 1, wherein the holder has a shape in which at least a surface of the other surface on which the second display device and the second light guide plate are mounted is recessed toward the one surface. apparatus. 5. The display device according to claim 1, wherein the display device is an LCD. 6. A space arranged on one surface or another surface of the holder and for preventing the space from being arranged between the holder and the first display device or the second display device. The display device according to any one of claims 1 to 5, further comprising a wiring circuit having the same. 7. The display device according to claim 6, wherein said wiring circuit is a flexible wiring circuit. 8. The display device according to claim 1, wherein the display device is a foldable portable terminal device.