KR20070024832A - Portable phone of a sound reinforced type - Google Patents

Abstract

A mobile phone for reinforcing sound is provided to effectively implement stereo or a 3D sound without increasing the entire thickness of a mobile phone. A main body of a mobile phone includes an opening(19). A touch pad(41) is disposed to be exposed from the main body and inputs information as a user touches it. A thin film speaker(51) is installed to form a vibration space at a lower side of the touch pad(41) and emits sound through the opening(19). A buffering member is interposed between the thin film speaker(51) and the touch pad(41). The thin film speaker(51) includes a central portion(53) made of ceramic and coated with piezoelectric material and an edge portion(55) surrounding the central portion(53).

Description

Sound reinforcement type mobile phone {PORTABLE PHONE OF A SOUND REINFORCED TYPE}

1 is a perspective view of a conventional folding mobile phone.

FIG. 2 is a perspective view for explaining a rotation operation of the folder part of FIG. 1. FIG.

3A is a schematic diagram for explaining a touch pad.

3B is a schematic diagram for explaining a thin film speaker.

Figure 4 is a perspective view of a sound-enhanced mobile phone according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4.

<Description of the symbols for the main parts of the drawings>

11: body portion 12: front cover

13: input key 19: opening

21: folder portion 31: hinge means

41: touch pad 43: recognition unit

45: FPC 51: thin film speaker

53: center portion 55: outer portion

61: main PC 71: vibration space

 The present invention relates to a mobile phone, and more particularly, to an acoustically enhanced mobile phone employing a thin film speaker and a touch pad.

A mobile phone is a portable communication device that enables a call without being restricted by a place, unlike a telephone installed in a home.

These mobile phones have a bar type, a folder type, a slide type according to their shape, and recently, a swivel type is being applied to them. Hereinafter, in the present specification, it will be described taking an example of a foldable cellular phone which is one of such forms.

This clamshell cellular phone will be described with reference to FIGS. 1 and 2 as follows.

FIG. 1 is a perspective view of a conventional folder type mobile phone, and FIG. 2 is a view for explaining a rotation operation of the folder part of FIG. 1.

As shown in these figures, the mobile phone includes a main body 111 and a folder portion 121 that is rotatably coupled to the main body 111.

The front of the main body 111 is provided with a plurality of keys 113 to input a signal, one side of the key 113 is provided with a microphone 115 to input sound information. A battery 117 for supplying power is detachably coupled to the rear surface of the main body 111, and a side surface of the main body 111 is provided with a camera (not shown) to take a picture or a video.

An external LCD 123 and an internal LCD 125 are respectively provided on the outer surface and the inner surface of the folder unit 121 so as to output predetermined visual information, and one side of the internal LCD 125 may output sound information. The speaker 127 is provided.

On the other hand, the hinge portion 131 is provided in the upper front region of the main body portion 111 to rotatably support the folder portion 121 with respect to the main body portion 111. The hinge means 131 is a swivel hinge 132 and a swivel hinge 132 that are rotatably disposed about a rotation axis A disposed along the thickness direction of the main body 111. And an opening / closing hinge portion 133 coupled to the swivel hinge portion 132 so as to be rotatable about the rotation axis B perpendicular to the rotation axis A of.

With this configuration, during the general call, the folder 121 is rotated to extend along the longitudinal direction of the main body 111 around the opening and closing hinge 133, and the call is made. As shown in FIG. 2, the internal LCD 125 is centered on the swivel hinge 132 in a state in which the folder 121 is deployed at a right angle to the main body 111 about the opening and closing hinge 133. Rotates to face the user side while taking a picture or video while viewing the screen displayed on the internal LCD 125.

In such mobile phones, multimedia functions are becoming more important.

Accordingly, in addition to the camera shooting functions described above, users tend to use a mobile phone to play games or watch movies and broadcasts while on the go or in a place where various multimedia facilities such as home or office are not available, such as a TV or a computer. Is increasing.

In addition, the increase of various multimedia functions as described above is promoting the high performance of the sound generating means such as the speaker 127 together with the enlargement of the image display means such as the internal LCD 125.

Now, the speaker 127 goes beyond simply delivering the voice of the other party and vividly delivers the sound transmitted from the movie, broadcast, or game to the mobile phone user.

However, such enhancement of the speaker 127 causes the speaker 127 to be enlarged. Accordingly, the size increase of the speaker 127 is pointed out as a bigger problem in a small mobile phone or a thin mobile phone (slim phone).

 In order to solve the above problems, an object of the present invention is to provide a sound-enhanced mobile phone with enhanced speaker function without increasing the thickness of the mobile phone.

In order to achieve the above object, the sound-enhanced mobile phone according to the present invention includes a main body of the mobile phone having an opening; A touch pad disposed to be exposed to the outside of the main body so that a user can input information by touching; It is formed to form a vibration space in the lower portion of the touch pad comprises a thin film speaker that emits sound through the opening.

Here, it is preferable to further include a buffer member interposed between the thin film speaker and the touch pad.

In addition, the thin film speaker may be formed of a ceramic and a center portion to which a piezoelectric material is applied, and an outer portion of the metal thin plate surrounding the center portion.

Hereinafter, with reference to the accompanying drawings, a sound-enhanced mobile phone according to an embodiment of the present invention will be described in more detail.

3A is a schematic diagram for explaining a touch pad, and FIG. 3B is a schematic diagram for explaining a thin film speaker.

First, referring to FIG. 3A, the touch pad 41 receives a recognition unit 43 for recognizing a user's touch, and receives an item recognized from the recognition unit 43 to control other components. (45, Flexible Printed Circuit Board).

The recognition unit 43 uses a method of detecting whether the user touches by using a change of constant voltage or heat as the user touches using a finger or the like. In addition, the FPC (45) has the advantage that the thickness is thin, unlike the conventional PC, having a ductility can be freely deformed to implement a variety of shapes.

Next, referring to FIG. 3B, the thin film speaker 51 is formed of a ceramic and has a central portion 53 coated with a piezoelectric material, an outer portion 55 of a metal sheet surrounding the central portion 53, and an electrical portion thereof. It consists of an electrical cable 57 connected to.

The central portion 53 converts electricity input through the cable 57 into displacement through the piezoelectric material. Accordingly, the center portion 53 vibrates to generate sound.

4 is a trial of the sound-enhanced mobile phone according to an embodiment of the present invention.

The sound reinforcing cellular phone according to the present invention includes a main body portion 11 and a folder portion 21 that is rotatably coupled to the main body portion 11.

A plurality of input keys 13 are provided on the front surface of the main body 11 so as to input signals, and a microphone 15 is provided on one side of the input keys 13 so as to input sound information. A battery 17 for supplying power is detachably coupled to a rear surface of the main body 11, and a side surface of the main body 11 is provided with a camera (not shown) to take a picture or a video.

An external LCD (not shown) and an internal LCD 25 are respectively provided on the outer surface and the inner surface of the folder portion 21 so as to output predetermined visual information, and one side of the internal LCD 25 may output sound information. The speaker 27 is provided so that it may be.

On the other hand, the front upper region of the main body portion 11 is provided with a hinge means 31 to rotatably support the folder portion 21 with respect to the main body portion (11).

Further, the front cover 12, which is the front surface of the main body 11, is coupled to the rear cover 18 to form an inner space in which the main PCB 61 (see FIG. 5) and the like are accommodated. The main PC 61 controls various components by receiving a signal as the user presses the input key 13, and forms a metal dome (not shown) that energizes the input key 13 according to the user's input. have.

Unlike the lower input key 13 on the upper side of the front cover 12, a touch pad 41 for receiving information by a user's touch is formed. In addition, an opening 19 is formed in the center of the touch pad 41.

Now, the configuration of the lower portion of the touch pad will be described in detail with reference to FIG. 5.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4.

The main PCB 61 is disposed between the front cover 12 and the rear cover 18, and a metal dome corresponding to the input key 13 protrudes from an upper surface thereof, and various electronic components are integrated on the lower surface thereof.

The thin film speaker 51 is mounted on the main PC 61 as described above. The cable 57 of the thin film speaker 51 is electrically connected to the main PC 61 to cause the central portion 53 of the thin film speaker 51 to vibrate under the control of the main PC 61.

In the touch pad 41, the FPC 45 and the recognition unit 43 are sequentially stacked on the thin film speaker 51. The FPC 45 is electrically connected to the main PCB 61. In addition, the touch pad 41 and the thin film speaker 51 are preferably laminated with a buffer member (not shown) therebetween. As such a buffer member, a porous polyurethane foam material etc. can be used, for example.

As such, the thin film speaker 51 may be installed at the lower portion of the touch pad 41 to secure a constant vibration space 71, thereby generating sound while vibrating according to an electrical signal of the main PCB 61.

The front cover 12 is formed higher than the touch pad 41, and an input key 13 protrudes from the lower side of the front cover 12.

Now, the operational effects of the acoustically enhanced mobile phone according to the present invention will be described.

When a user makes a call using a mobile phone or performs various multimedia functions such as watching a game, broadcasting, or listening to music, the main PC 61 controls the existing speaker 27 to generate sound. Generate sound.

In addition, the main PC 61 may command a sound output to the thin film speaker 51. In this case, the main PC 61 gives an electrical signal to the central portion 53 of the thin film speaker 51 via an electrically connected cable 57. The central portion 53 receiving the signal vibrates with the piezoelectric material causing displacement.

Vibration of the center portion 53 of the thin film speaker 51 is made in the vibration space 71, this vibration generates sound and mechanical vibration is a buffer member interposed between the thin film speaker 51 and the touch pad 41 Is absorbed by.

Sound caused by the vibration of the thin film speaker 51 is emitted to the outside through the opening 19 formed in the front cover 12 is transmitted to the user.

According to this configuration, it is possible to use only a thin film speaker 51 having a thin thickness without using a conventional magnetic speaker, for example, the speaker 27, which increases in size as the power is enhanced, thereby avoiding restrictions on the thickness of the mobile phone. Can be.

Furthermore, it is also possible to easily implement a stereo or 3D sound function that has been difficult to implement in the past by using these simultaneously.

Although the foregoing description has been made using a folding mobile phone as an example, the present invention may be applied to other types of mobile phones and portable image devices (eg, PDAs) such as bar and slide types, without departing from the scope and spirit of the present invention. It will be understood by those skilled in the art.

As described above, the acoustically enhanced mobile phone according to the present invention adopts a thin FPC and a thin film speaker instead of a thick PC to effectively implement stereo or 3D sound without greatly increasing the overall thickness of the mobile phone. It works.

Claims (3)

A main body of the mobile phone having an opening formed therein; A touch pad disposed to be exposed to the outside of the main body so that a user can input information by touching; Sound-enhanced mobile phone comprising a thin film speaker installed to form a vibration space in the lower portion of the touch pad to emit sound through the opening. The method of claim 1, An acoustic reinforcement type mobile phone further comprising a buffer member interposed between the thin film speaker and the touch pad. The method according to claim 1 or 2, The thin film speaker is formed of a ceramic and the acoustic reinforcement-type mobile phone, characterized in that formed in the center of the piezoelectric material is applied, and the outer portion of the metal sheet surrounding the central portion.

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