JP2001284758A - Portable unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an LCD connector in a portable unit such as a portable telephone set. SOLUTION: An LCD 10 is kept by an intermediate chassis/LCD holder 6 so that it is confronted with a transparent panel 3. An LCD driver 11 is mounted at the left edge of the upper face of a lower glass substrate 102 in the LCD 10. A lower face at the tip of a flexible printed circuit 12 extended in a horizontal direction from the LCD driver 11 is brought into contact with terminals 91 in a line in an LCD connector/inter-substrate connector 9. The lower end of the LCD connector/inter-substrate connector 9 is fixed to a main printed board 5, terminals 92 in a line among the terminals of a plurality of lines at an upper end are brought into contact with a key printed board 7, and the terminals 91 in the other line are brought into contact with the lower face at the tip of the flexible printed circuit 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable device such as a portable telephone, and more particularly, to a portable device which realizes a reduced number of components and a thin display element.

[0002]

2. Description of the Related Art Portable devices such as portable telephones generally include an LCD module as a display element. FIG. 2 is a sectional view showing the internal structure of such a portable device. Note that a portion located above when the portable device is used is defined as an upper portion of the device.

This portable device has a rear cover 21 as a housing.
And a front cover 22. Front cover 22
There is one large opening on the upper surface side of the, where the transparent panel 23 is fixed. Also, the front cover 22
There are a plurality of openings on the lower surface from the center of the keypad, into which the keypad 24 is inserted. The upper ends of the rear cover 21 and the front cover 22 are locked by locking claws 21A, 22A. The same applies to the lower end and side ends.

A main printed circuit board 25, an intermediate chassis 26, and a key printed circuit board 27 are disposed inside the housing in this order from the bottom side. The main printed board 25 is locked on the lower surface of the intermediate chassis 26, and the key printed board 27 is locked on the upper surface of the intermediate chassis 26. Then, a through hole formed in the center of the rear cover 21 and the front cover
A center screw 28 is fixed between a screw hole 26A formed in the center of the 22 and a center screw 28.

[0005] Main printed circuit board 25 and key printed circuit board
27 is connected by an inter-board connector 29. An LCD holder 30 is provided on the key printed board 27. The LCD 31 is set to face the transparent panel 23.
It is held by a holder 30. Note that the LCD holder 30
A cushion is interposed between the LCD 31 and the inner wall surface of the front cover 22.

The LCD 31 is composed of a transparent glass substrate 31 having two upper and lower layers.
It has a four-layer structure consisting of 1, 312 and a polarizing plate laminated on the upper and lower sides thereof, and one end of the flexible printed circuit 32 is connected to the right edge of the upper surface of the lower transparent glass substrate 312 . The flexible printed circuit 32 has a cross section that is bent into a substantially J-shape and extends around the rear surface (downward) of the LCD 31. An LCD driver 33 is mounted on the tip of the LCD driver 33, and is connected to an LCD connector 34 provided on the key printed circuit board 27. An LCD module is configured by the LCD 31, the flexible printed circuit 32, and the LCD driver 33. LCD31
On the lower side, a light guide plate for backlight and a reflection plate are arranged.

[0007]

In the above-mentioned conventional portable equipment, an LCD connector (a dedicated connector for connecting the LCD module to the substrate) was required to connect the LCD module to the key printed circuit board. In addition, LCD
LCD driver is located on the back of the
The thickness of the D module was large. Furthermore, since the board space near the LCD module is occupied by the LCD connector, the board space is small.

The present invention has been made to solve such a problem, and has as its object to provide a portable device that does not require a connector dedicated to a display element. Another object of the present invention is to provide a portable device having a small display element. Still another object of the present invention is to provide a portable device having a large substrate space near a display element.

[0009]

A portable device according to the present invention comprises a first printed circuit board, a second printed circuit board disposed above the first printed circuit board, and a first printed circuit board. A display element disposed above, a single connector connected between the first printed circuit board and the second printed circuit board, and between the first printed circuit board and the display element; It is characterized by having. With this configuration, a connector dedicated to the display element is not required, and the board space near the display element is increased.

The display element is an LCD module having a transparent glass substrate, a driving circuit mounted on the transparent glass substrate, and a flexible printed circuit extending horizontally from the driving circuit. Further, the flexible printed circuit is connected to the connector. With this configuration, the thickness of the LCD module as a display element can be reduced.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing an internal structure of a portion above a substantially central portion of a portable device according to an embodiment of the present invention.

This portable device has a rear cover 1 as a housing.
And a front cover 2. Front cover 2
There is one large opening on the upper surface side of the transparent panel 3, in which the transparent panel 3 is fixed. The front cover 2 has a plurality of small openings on the surface below the center, into which the keypad 4 is inserted. The upper ends of the rear cover 1 and the front cover 2 are locked by locking claws 1A and 2A. The same applies to the lower end and side ends.

A main printed circuit board 5, an intermediate chassis / LCD holder 6, and a key printed circuit board 7 are sequentially arranged from the bottom side inside the housing. The main printed circuit board 5 is locked on the lower side of the intermediate chassis and LCD holder 6, and the key printed circuit board 7 is
The upper surface of the D holder 6 is locked at a position facing the lower surface of the keypad 4.

On the main printed circuit board 5, main circuit chips and components of the portable device are mounted. Further, a through hole or a U-shaped notch is formed in a central portion for passing a projecting portion of an intermediate chassis / LCD holder 6 described later.

The intermediate chassis / LCD holder 6 has a claw on its lower surface for locking the main printed circuit board 5 and a claw on its upper surface for locking the key printed circuit board 7. Further, a claw for holding the LCD 10 is provided on the upper surface side. Further, the central portion protrudes downward through a through hole or a U-shaped notch formed in the central portion of the main printed circuit board 5, and a screw hole 6A is provided inside the portion. A space (through hole) for accommodating an LCD connector / substrate connector 9 to be described later is formed slightly behind the central portion.

A key switch 7A is provided on the key printed board 7 at a position facing the lower surface of the key pad 4. Here, the frontmost key switch is arranged above the center screw 8.

A center screw 8 fixes between a through hole formed in the lower surface of the central portion of the rear cover 1 and a screw hole 6A formed in the intermediate chassis and LCD holder 6. In the conventional portable device described above, the front cover 22 is fixed with the center screw 28 from the rear cover 21 side.
The intermediate chassis 26 was only fixed to the rear cover 21 with claws and was not fixed with the center screw 28. For this reason, there is a risk of rattling when receiving an external impact. On the other hand, in the present embodiment, the intermediate chassis and LCD holder 6 is fixed with the center screw 8 from the side of the rear cover 1 and is drawn into the rear cover 1 side, so that it does not rattle even if it receives an external impact.

The LCD 10 is held by the intermediate chassis / LCD holder 6 so as to face the transparent panel 3. A cushion is interposed between the upper end of the intermediate chassis / LCD holder 6 and the LCD 10 and the inner wall surface of the front cover 2. The LCD 10 has a two-layer transparent glass substrate 10
The lower glass substrate 102 has an LCD driver 11 on the left edge of the upper surface of the lower glass substrate 102. Note that LC
A light guide plate for backlight and a reflection plate are arranged below D10.

One end of a flexible printed circuit 12 is connected to the left end of the LCD driver 11. The flexible printed circuit 12 extends horizontally on the upper surface of the middle portion of the intermediate chassis and LCD holder 6, and the lower surface of the leading end thereof contacts a row of terminals 91 of the LCD connector / inter-board connector 9. I have. The upper surface of the flexible printed circuit 12 is pressed from above by the lower surface of the key printed circuit board 7.

The lower end of the LCD connector / substrate connector 9 is fixed to the upper surface of the main printed circuit board. The LCD connector / substrate connector 9 is disposed in a space (through hole) formed in the intermediate chassis / LCD holder 6, and one of the two rows of connection terminals at the upper end is connected.
Reference numeral 92 contacts the key printed circuit board, and another row of terminals 91 contacts the lower surface of the distal end portion of the flexible printed circuit 12 as described above.

As described above, in the portable device according to the embodiment of the present invention, since the inter-board connector is used as the LCD connector, the number of connectors can be reduced and the board space near the LCD module can be increased. Also, LC
Since the D driver is mounted on the transparent glass substrate of the LCD and connected to the LCD connector and inter-substrate connector by a horizontally extended flexible printed circuit, the thickness of the LCD module can be reduced. Further, since the intermediate chassis and the LCD holder are also used, it is not necessary to fix the LCD holder on the key printed circuit board as in the related art. Since the upper surface of the flexible printed circuit 12 is pressed from above by the lower surface of the key printed circuit board 7, stable contact can be obtained.

Further, since the intermediate chassis and LCD holder 6 is fixed from the side of the rear cover 1 by the center screw 8, there is no play in the cover even if it receives an external impact. The center screw 8 penetrates from the rear surface of the rear cover 1 to the lower surface of the intermediate chassis and LCD holder 6, and the screw 8 does not reach the rear surface of the front cover 2. For this reason, it is possible to provide an opening in an area on the surface of the front cover 2 and on an extension of the screw 8, and to arrange the keypad 4 and the transparent panel 3 there.

[0024]

As described above, the present invention provides a first printed circuit board, a second printed circuit board disposed above the first printed circuit board, and a first printed circuit board disposed above the first printed circuit board. And a single connector connected between the first printed circuit board and the second printed circuit board and between the first printed circuit board and the display element. Accordingly, a portable device having an excellent effect that a connector dedicated to a display element is not required and a substrate space near the display element is widened is provided.

Further, the display element is an LCD module having a transparent glass substrate, a drive circuit mounted on the transparent glass substrate, and a flexible printed circuit extending horizontally from the drive circuit, and An object of the present invention is to provide a portable device having an excellent effect that the thickness of an LCD module as a display element can be reduced by connecting the flexible printed circuit and the connector.

Further, a flexible printed circuit is used in the first
A portable device having an excellent effect that a stable contact can be obtained by pressing the printed circuit board from above.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an internal structure of a portable device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the internal structure of a conventional portable device.

[Explanation of symbols]

 5 Main printed circuit board 6 Intermediate chassis and LCD holder 7 Key printed circuit board 9 LCD connector and inter-board connector 10 LCD 11 LCD driver 12 Flexible printed circuit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H01R 12/16 H04B 1/08 E 5K016 H04B 1/08 H01R 23/68 303C (72) Inventor Hideo Haga Yokohama-shi, Kanagawa Matsushita Communication Industrial Co., Ltd. (3-1) Tsunashima Higashi 4-chome, Kohoku-ku (72) Inventor Yonobu Ikeda 3-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama, Kanagawa Prefecture F-term (reference) 2H089 HA30 HA40 KA17 NA60 QA11 QA12 QA13 TA03 2H092 GA48 GA51 GA56 GA57 GA60 MA32. LL07 5K016 AA09 BA06 CE05 DA01 EA04 GA02 HA06

Claims (3)

[Claims] A first printed circuit board, a second printed circuit board disposed above the first printed circuit board, and a display element disposed above the first printed circuit board.
A portable device comprising a single connector connected between the first printed circuit board and the second printed circuit board and between the first printed circuit board and the display element; . 2. The LCD module according to claim 1, wherein the display element includes a transparent glass substrate, a driving circuit mounted on the transparent glass substrate, and a flexible printed circuit extending in a horizontal direction from the driving circuit. The portable device according to claim 1, wherein the flexible printed circuit is connected to the connector. 3. The portable device according to claim 2, wherein the flexible printed circuit is pressed from above by the first printed circuit board.