KR100652692B1 - Mobile communicaiton terminal - Google Patents

Abstract

The present invention relates to a keypad and a mobile communication terminal having the same which can reduce the brightness deviation between keys. According to an aspect of the present invention, there is provided a mobile communication terminal having a keypad capable of reducing brightness variation between keys, the casing including a plurality of key holes; A PCB having a plurality of switches and light emitting elements and installed in the casing; A keypad having a plurality of keys to operate the switch, the keypad being housed in the casing to expose the keys to the outside; It characterized in that it comprises a first reflecting portion formed to reflect the light of the light emitting device on one side in the thickness direction of the keypad. As a result, the brightness deviation between the keys can be reduced and the brightness of the keys can be increased.

Description

Mobile terminal {MOBILE COMMUNICAITON TERMINAL}

1 is a perspective view of a conventional mobile communication terminal,

2 is an exploded perspective view of the keypad area of FIG. 1;

3 is a cross-sectional view of the key region of FIG. 1;

4 is an exploded perspective view of a keypad area of a mobile communication terminal capable of reducing brightness deviation between keys according to an embodiment of the present invention;

5 is a rear view of the first reflector of FIG. 4;

6 is an enlarged cross-sectional view of the first reflecting portion taken along line VI-VI of FIG. 4;

7 is an enlarged cross-sectional view of the engagement state of the key region for explaining the operation of the first reflecting portion of FIG.

8 is a partial perspective view of a mobile communication terminal capable of reducing the brightness deviation between keys according to another embodiment of the present invention;

9 is an exploded perspective view of the keypad and the first reflector of FIG. 8;

10 is an exploded perspective view of the second reflector and the PC of FIG. 8;

FIG. 11 is an enlarged cross-sectional view taken along the line A-A of FIG. 10;

FIG. 12 is an enlarged cross-sectional view of a coupled state of a key region for explaining the operation of the first reflecting portion and the second reflecting portion of FIG. 8.

Explanation of symbols on the main parts of the drawings

10: lower folder 11: casing

12a: front casing 14: keyhole

21: PC 23: Switch

27: light emitting element 31: keypad

32: pad body 36: key

50: upper folder 61: the first reflecting unit

62: main body 64: reflective layer

65: through hole 67: blocking layer

The present invention relates to a keypad for reducing the brightness deviation between keys and a mobile communication terminal having the same. More particularly, the present invention relates to a mobile communication terminal capable of reducing the brightness deviation between keys and increasing the brightness of the keys. .

1 is a perspective view of a conventional mobile communication terminal, FIG. 2 is an exploded perspective view of the keypad region of FIG. 1, and FIG. 3 is a cross-sectional view of the key region of FIG. 1. As shown in these drawings, the mobile communication terminal includes a lower folder 10 having a PC 21 and a plurality of keys 36 to perform various functions, and a display panel to output visual information. It is provided with a 53 and the upper folder 50 which is coupled to the lower folder 10 so as to be relatively rotatable.

The hinge 51 is formed at one side of the upper folder 50, and the display panel 53 is provided at the inner plate surface. One side of the display panel 53 is provided with a speaker 55 to output predetermined auditory information.

On the other hand, the lower folder 10, the casing 11 to form a receiving space therein, the PC 21 accommodated in the casing 11, and a plurality of keys 36 to input the operation signal And a keypad 31 accommodated in the casing 11 and a battery 41 detachably coupled to the rear surface of the lower folder 10.

One side of the casing 11 has a hinge coupling portion 13 is formed so that the upper folder 50 can be rotatably coupled, the casing 11 is in contact with each other in the thickness direction facing the receiving space therein The front casing 12a and the back casing 12b which are formed are provided. A plurality of key holes 14 are formed through the front casing 12a so that each key 36 may be exposed to the outside, and a microphone hole 16 may be input at one side of the key hole 14 to input auditory information. ) Is formed.

A plurality of switches 23 are formed on one side of the PCB 21 so as to be operated when the pressing operation is performed, and a plurality of switches 23 are usually formed of LEDs so as to illuminate each key 36 around the switch 23. The light emitting element 27 is arrange | positioned.

The keypad 31 has a pad body 32 having a plurality of protrusions 34 formed thereon so as to be able to push and operate the switches 23 on one side thereof, and a plurality of coupled to positions corresponding to the protrusions 34. Is composed of a key 36.

By the way, in such a conventional mobile communication terminal, each light emitting element 27 is arranged to be scattered around the switch 23, so that when the light emitting element 27 is operated, it is spaced apart from the light emitting element 27. Accordingly, there is a problem that the brightness of the key 36 is changed and the deviation of the brightness between the keys 36 is increased.

Accordingly, an object of the present invention is to provide a mobile communication terminal capable of reducing the brightness deviation between keys and increasing the brightness of the keys.

The above object is, according to the present invention, a casing in which a plurality of key holes are formed; A PCB having a plurality of switches and light emitting elements and installed in the casing; A keypad having a plurality of keys to operate the switch, the keypad being housed in the casing to expose the keys to the outside; It is achieved by a mobile communication terminal having a keypad that can reduce the brightness deviation between keys, characterized in that it comprises a first reflecting portion formed to reflect the light of the light emitting device on one side along the thickness direction of the keypad.

Here, the first reflecting portion is preferably formed on the casing side surface of the keypad.

Preferably, the first reflecting portion is formed on the PCB side of the keypad.

Preferably, the first reflector includes a reflective sheet having a plurality of through holes formed to correspond to the keys so that light can pass therethrough.

It is effective to configure the first reflector further comprises a blocking layer formed on the surface of the reflective sheet to block the transmission of light.

The keypad preferably includes a pad body having protrusions corresponding to the switch, and a plurality of keys coupled to the pad body through the through hole with the reflective sheet therebetween.

It is effective to further include a second reflecting portion formed to reflect light on the surface of the PC.

The second reflecting unit may be configured to include a second reflecting sheet disposed on a surface of the PCB having a plurality of through-holes through which the switch and the light emitting device can pass.

It is effective that the second reflecting sheet is adhered to the surface of the PC.

The second reflecting unit is preferably configured to be coupled to the metal dome of the switch is integrally bonded to one side of the switch.

On the other hand, according to another field of the present invention, the keypad having a plurality of keys to operate the switch of the PC stored in the inside of the casing and the housing is coupled to the inside of the casing so that the key is exposed to the outside; According to the thickness direction of the keypad is provided with a keypad that can reduce the brightness deviation between keys, characterized in that it comprises a first reflecting portion formed to reflect the light of the light emitting device of the PC on one side.

Here, the first reflecting portion is preferably configured to include a reflective sheet disposed on the casing side surface of the keypad having a plurality of through holes penetrated corresponding to the key so that light can pass.

It is effective to configure the first reflector further comprises a blocking layer formed on the surface of the reflective sheet to block the transmission of light.

It is preferable to further include a second reflection portion disposed on the surface of the PC to be spaced apart from the first reflection portion a predetermined distance to reflect light.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

4 is an exploded perspective view of a keypad area of a mobile communication terminal capable of reducing the brightness deviation between keys according to an embodiment of the present invention, FIG. 5 is a rear view of the first reflector of FIG. 4, and FIG. 6 is a VI of FIG. 4. 7 is an enlarged cross-sectional view of the first reflecting portion along line VI, and FIG. 7 is an enlarged cross-sectional view of the engagement state of the key regions for explaining the operation of the first reflecting portion of FIG. The same and equivalent parts as the above-described and illustrated configurations are given the same reference numerals for convenience of description, and detailed description thereof will be omitted. As shown in these figures, the mobile communication terminal capable of reducing the brightness deviation between the keys includes a casing 11 in which a plurality of key holes 14 are formed, a plurality of switches 23, and a light emitting element 27. And a plurality of keys 36 to operate the switch 23 and the PCB 21 installed inside the casing 11 so that the key 36 is exposed to the outside of the casing 11. Keypad 31 accommodated therein and a first reflecting portion 61 implemented in the form of a reflective sheet to reflect the light of the light emitting device 27 on one side in the thickness direction of the keypad 31 It is.

The mobile communication terminal capable of reducing the brightness deviation between the keys is implemented in the form of a so-called foldable mobile communication terminal having an upper folder 50 and a lower folder 10 which are coupled to be rotatable relative to each other. A flip type mobile communication terminal or a so-called slide type mobile communication terminal slidably coupled to each other may be configured.

On one side of the front casing 12a, a hinge coupling portion 13 is formed so that the upper folder 50 can be rotatably coupled, and a plurality of key holes 14 and a microphone are accommodated in the plate surface. The holes 16 are each formed through.

A plurality of switches 23 are operated on the upper surface of the PCB 21, and the switches 23 are made of a metal member having elasticity with the pattern portion 24b formed integrally with the PCB 21. A metal dome 24a is formed to have a shape and disposed on each of the pattern portions 24b. Each metal dome 24a is integrally coupled to the PCB 21 by an adhesive sheet 25.

The keypad 31 includes a pad body 32 and a pad body 32 having a plurality of protrusions 34 protruding in a thickness direction on a bottom surface thereof corresponding to each switch 23 of the PCB 21. A plurality of keys 36 are provided on an upper surface of the upper surface of the plurality of keys 36, corresponding to each of the protrusions 34. Each key 36 is formed to have a variety of shapes, such as by injection molding the synthetic resin member.

On the other hand, the first reflecting portion 61, the main body portion 62 is formed in the form of a reflective sheet so as to have a shape corresponding to the shape of the pad body 32, the light is the main body portion 62 It is formed to have a thin thickness of about 0.5 mm including a blocking layer 67 formed to block the transmission of the portion 62.

The main body portion 62 is formed of a transparent synthetic resin member, and is provided with a reflective layer 64 formed in the form of a thin film by a method such as vapor deposition of a metal member so as to reflect light inside the thickness direction. . In the main body 62, a plurality of through holes 65 are formed to penetrate the plate surface corresponding to each key 36 so that light can pass therethrough, and the reflective layer 64 and the surface of the main body 62 are formed. The blocking layer 67 is formed by a method such as black silk printing or laminating to block light passing through the main body 62.

With this configuration, when the keypad 31 and the first reflecting portion 61 are to be coupled, the first reflecting portion 61 is disposed on the surface of the pad body 32, and the first reflecting portion 61 is disposed. An adhesive material (not shown) may be applied to the inside of each through hole 65 so that the corresponding key 36 is adhered. Here, it is preferable that the first reflecting portion 61 is adhesively bonded to the surface of the pad body 32.

When the combination of the keypad 31 and the first reflector 61 is completed, the keypad 31 is removed from the rear side of the front casing 12a so that each key 36 is inserted into the key hole 14 of the front casing 12a. It is only necessary to insert the PCB 21 at the rear of the keypad 31.

On the other hand, when light is emitted from the light emitting element 27, the reflective layer 64 reflects the light, and the blocking layer 67 blocks the light from passing through the front casing 12a. Accordingly, the light emitted from the light emitting element 27 is totally or diffusely reflected between the first reflecting portion 61 and the PCB 21 to pass through each through hole 65 to illuminate the corresponding key 36.

FIG. 8 is a partial perspective view of a mobile communication terminal capable of reducing variation in brightness between keys according to another embodiment of the present invention. FIG. 9 is an exploded perspective view of the keypad and the first reflector of FIG. 8, and FIG. FIG. 11 is an enlarged cross-sectional view taken along line AA of FIG. 10, and FIG. 12 is a view illustrating a combined state of key regions for explaining the operation of the first and second reflectors of FIG. 8. It is an enlarged cross section. As shown in these figures, the mobile communication terminal capable of reducing the brightness deviation between the keys includes a casing 11 in which a plurality of key holes 14 are formed, a plurality of switches 23, and a light emitting element 27. PC 21 provided in the casing 11 and a plurality of keys 36 to operate the switch 23 so that the key 36 is exposed to the outside of the casing 11. The first reflection unit 61 and the PCB 21, which is implemented in the form of a reflective sheet to reflect the light of the light emitting device 27 on one side along the thickness direction of the keypad 31, the keypad 31 is received and coupled to the keypad 31; And a second reflecting portion 71 formed to reflect light on the surface of the < RTI ID = 0.0 >

A hinge coupling portion 13 is formed at one side along the longitudinal direction of the front casing 12a, and a plurality of key holes 14 and microphone holes 16 are formed at the front surface, respectively.

The keypad 31 includes a pad body 32 and a pad body 32 having a plurality of protrusions 34 protruding in a thickness direction on a bottom surface thereof corresponding to each switch 23 of the PCB 21. A plurality of keys 36 are provided on an upper surface of the upper surface of the plurality of keys 36, corresponding to each of the protrusions 34.

The first reflecting portion 61 has a main body portion 62 formed in the form of a reflection sheet so as to have a shape corresponding to the shape of the pad body 32, and light is emitted to the surface of the main body portion 62. It comprises the blocking layer 67 formed so that it may block the penetration of 62.

The main body portion 62 is formed of a transparent synthetic resin member, and is provided with a reflective layer 64 so as to reflect light therein along the thickness direction. In the main body 62, a plurality of through holes 65 are formed to penetrate the plate surface corresponding to each key 36 so that light can pass therethrough, and the reflective layer 64 and the surface of the main body 62 are formed. The blocking layer 67 is formed by a method such as black silk printing or laminating to block light passing through the main body 62.

On the other hand, the upper surface of the PC 21 is provided with a plurality of switches 23 that are operated when pressed to input a signal, a plurality of light emitting elements to illuminate the key 36 around the switch 23 27 is arrange | positioned. The switch 23 is composed of a metal dome 24a formed to have a disk shape as an elastic metal member, and a pattern part 24b integrally formed on the upper surface of the PC 21, and each metal dome 24a. ) Is bonded to the pattern portion 24b by an adhesive sheet 25 bonded to the upper surface of the PCB 21.

The second reflector 71 is implemented in the form of a film-like reflective sheet having a thin thickness of about 0.5 mm. The second reflecting portion 71 is a transparent synthetic resin member, which is formed to correspond to the shape of the top surface of the PCB 21, and a reflective layer formed to reflect light inside the body portion 72. (75) is provided. The main body portion 72 is formed with a plurality of through holes 74 penetrating through the plate surface so that the switch 23 and the light emitting element 27 can be exposed and coupled, the bottom surface is formed on the top surface of the PC 21. An adhesive layer 77 is formed so that it can be bonded.

By this structure, the keypad 31 is inserted in the back side of the front casing 12a so that the key 36 is inserted into each key hole 14 of the front casing 12a, and the back of the keypad 31 21) to be combined. Next, when the front casing 12a and the rear casing 12b are brought into contact with each other along the thickness direction, the coupling is completed.

On the other hand, the light emitted from the light emitting element 27 is the first reflecting portion 61 and the second reflecting portion (61) by each of the reflective layers (64, 75) of the first reflecting portion 61 and the second reflecting portion (71) ( The total reflection or diffuse reflection between the 71 is emitted to the corresponding key 36 through each through hole 65 to illuminate the corresponding key 36. At this time, the blocking layer 67 formed on the surface of the first reflecting portion 61 prevents the light passing through the reflective layer 64 of the first reflecting portion 61 from leaking to the outside.

In the embodiment described above with reference to FIGS. 8 to 12, the metal dome made of the elastic metal member constituting the switch is joined by the adhesive sheet to the pattern portion of the switch formed in the PC, and the second reflecting portion is disposed on the adhesive sheet. Although the case is configured as an example, the metal dome of each switch is coupled to the back of the second reflector so that the second reflector is directly bonded to the upper surface of the PC so that each metal dome is in contact with the pattern portion of the switch. It may be.

In the above-described and illustrated embodiments, the case in which the first reflecting portion is configured to be arranged on the front surface side of the keypad is exemplified, but may be configured to be arranged on the back side of the keypad.

In addition, in the above-described and illustrated embodiments, the case in which the first reflecting portion is formed separately from the keypad and configured to be integrally coupled to each other has been described as an example, but may be configured to be integrally formed in the form of a reflective film on the back of the keypad. .

As described above, according to the present invention, there is provided a casing in which a plurality of key holes are formed, a PC installed in the casing with a plurality of switches and light emitting elements, and a plurality of keys for operating a switch. A key is received and coupled to the inside of the casing so that the key is exposed to the outside, and comprises a first reflector implemented in the form of a reflective sheet to reflect the light of the light emitting device on one side in the thickness direction of the keypad to emit from the light emitting device The mobile communication terminal is provided with a keypad that can increase the brightness of the keys by reflecting the light, and also reduce the brightness variation between the keys, which can reduce the deviation of the brightness between the keys to obtain a uniform key lighting effect.

In addition, according to the present invention, the keypad is provided with a plurality of keys to operate the switch of the PCB stored in the inside of the casing is accommodated inside the casing so that the key is exposed to the outside, and one side along the thickness direction of the keypad By including a first reflecting portion formed to reflect the light of the light emitting element of the PC, it is possible to increase the brightness of each key through the reflection of the light emitted from the light emitting element and to reduce the variation of the brightness between the keys between the uniform lighting effect A keypad is provided to reduce the brightness deviation between keys, which can be obtained.

Claims (14)

Keys disposed to be exposed to the outside in the plurality of key holes formed in the casing; A plurality of switches mounted on an upper surface of the PCB installed in the casing and receiving a signal according to the operation of the keys; A light emitting device mounted on an upper surface of the PC to illuminate the keys; A keypad mounted on a lower surface of the keys to support the keys and to press the switch according to the pressing operation of the keys; A first reflector mounted on a surface of the keypad to reflect light emitted from the light emitting device; A second reflector attached to a surface of the PC to reflect the light reflected from the first reflector to the keys; The first reflecting portion is provided with a through hole corresponding to the key and is mounted on the surface of the keypad and pressed on the surface of the keypad, a reflective layer laminated in the middle of the body portion to reflect light, and a surface of the body portion. Mobile communication terminal, characterized in that consisting of a blocking layer for blocking the light passing through the main body. delete delete delete The method of claim 1, And the second reflecting unit comprises a second reflecting sheet disposed on a surface of the PCB having a plurality of through-holes through which the switch and the light emitting element can pass. The method of claim 5, The second reflection sheet is a mobile communication terminal, characterized in that bonded to the surface of the PC. The method of claim 1, The second reflecting unit is a mobile communication terminal, characterized in that the metal dome of the switch is coupled to one side and integrally bonded to the PC. delete delete delete delete delete delete delete

Images