CN101789324B

CN101789324B - Hand-held electronic device and luminous keyboard thereof

Info

Publication number: CN101789324B
Application number: CN 200910002970
Authority: CN
Inventors: 黄哲宏; 陈垂鸿
Original assignee: High Tech Computer Corp
Current assignee: HTC Corp
Priority date: 2009-01-23
Filing date: 2009-01-23
Publication date: 2013-02-20
Anticipated expiration: 2029-01-23
Also published as: CN101789324A

Abstract

The invention relates to a luminous keyboard, which comprises a circuit board, a light source, a key and a light guide mechanism, wherein the light source is arranged on the circuit board; the key can move relative to the circuit board along a first direction; the light guide mechanism comprises a light guide plate and an extension structure which are connected mutually; the extension structure and the light guide plate form an incident face; light rays emitted from the light source enter the light guide plate through the incident face; and particularly, the height of the incident face in the first direction is larger than the thickness of the light guide plate.

Description

Portable electric device and illuminated keyboard thereof

Technical field

The present invention is about a kind of illuminated keyboard, especially in regard to a kind of illuminated keyboard that promotes leaded light efficient.

Background technology

At first see also Fig. 1, one traditional illuminated keyboard is applicable to handheld electronic device, mainly comprise a circuit board 100, a light source 200, a light-guiding mechanism 300, a cover body 400, at least one button 500, an elastomer 600 and a switch module 700, wherein switch module 700, elastomer 600, light-guiding mechanism 300 and button 500 all are arranged on circuit board 100 tops, when button 500 is subjected to a pressed by external force, can pass through elastomer 600 touch switch assemblies 700.

As shown in Figure 1, aforementioned light source 200 is arranged on the circuit board 100 and has a height H, but wherein light source 200 emission of lights enter light-guiding mechanism 300 inside, and guides light to key zone A via light-guiding mechanism 300, so that button 500 produces luminous effect.Generally speaking, traditional light-guiding mechanism 300 only is comprised of single light guide plate 310 mostly, and wherein light guide plate 310 has the thickness d of homogeneous.

Because the thickness d of light guide plate 310 is usually less than the height H of light source 200, cause the light that light source 200 sends fully directly to enter via the plane of incidence 300 ' of light-guiding mechanism 300 in the light guide plate 310 (shown in the arrow among Fig. 1), so will cause energy loss and brightness is descended.In view of this, but how to improve traditional drawback and provide a kind of illuminated keyboard of raising efficiency to begin to become an important problem.

Summary of the invention

The invention provides a kind of illuminated keyboard, comprise a circuit board, a light source, a button and a light-guiding mechanism.Aforementioned light source is arranged on the circuit board, and aforementioned keys is positioned on the light guide plate and a side of extended structure, wherein button relatively circuit board move along a first direction.Aforementioned light-guiding mechanism comprises an interconnective light guide plate and an extended structure, and wherein extended structure and light guide plate form a plane of incidence, and the light that light source sends enters light guide plate via the plane of incidence.In particular, the aforementioned plane of incidence at the height on the first direction greater than the thickness of light guide plate on first direction.

In one embodiment, aforementioned extended structure is that identical material is made.

In one embodiment, aforementioned extended structure and light guide plate are formed in one.

In one embodiment, aforementioned extended structure and light guide plate interconnect with bonding mode.

In one embodiment, aforementioned extended structure has a triangular-section.

In one embodiment, aforementioned extended structure is separately positioned on the opposition side of light guide plate.

In one embodiment, aforementioned extended structure has one first reflecting surface, and the light that light source sends enters light guide plate via reflecting surface.

In one embodiment, a bottom surface of aforementioned light guide plate is one second reflecting surface, in order to reflection ray.

In one embodiment, aforementioned illuminated keyboard also comprises a reflector, is configured on this circuit board, and wherein light source is positioned at reflector.

In one embodiment, aforementioned illuminated keyboard also comprises a switch module, is arranged on the circuit board touch switch assembly when button is subjected to a pressed by external force.

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly also cooperates accompanying drawing to elaborate.

Description of drawings

Fig. 1 represents the schematic diagram of a traditional illuminated keyboard;

Fig. 2 represents the illuminated keyboard schematic diagram of one embodiment of the invention; And

Fig. 3 represents the illuminated keyboard schematic diagram of another embodiment of the present invention.

The primary clustering symbol description

Circuit board 10

Light source 20

Light-guiding mechanism 30

The plane of incidence 30 ', 30 "

Light guide plate 31

Extended structure

32,33

The first reflecting surface 321

Bottom surface 311

Reflector 40

Circuit board 100

Light source 200

Light-guiding mechanism 300

The plane of incidence 300 '

Light guide plate 310

Cover body 400

Button 500

Elastomer 600

Switch module 700

Key zone A

Elastomer D

Thickness d

Height h, H

Button K

Switch module S

Embodiment

See also Fig. 2, the illuminated keyboard of one embodiment of the invention can be applicable in the handheld electronic device, this portable electric device for example is super brain machine (ultra mobile personal computer, UMPC), Tablet PC (tablet PC), palmtop computer (pocket PC), personal digital assistant (personal digital assistant, PDA) or mobile phone (mobile phone) etc.

Aforementioned illuminated keyboard mainly comprises a circuit board 10, a light source 20, a light-guiding mechanism 30, a reflector 40, at least one button K, an elastomer D and a switch module S, wherein switch module S, elastomer D, light-guiding mechanism 30 and button K all are arranged on circuit board 10 tops, as user during along a first direction (Z-direction) pressing keys K, can pass through elastomer D touch switch assembly S.

Light source 20 in the present embodiment for example is a light-emitting diode, be arranged on the circuit board 10 and have a height H, aforementioned reflector 40 is configured on the

circuit board

10, and 20 of light sources are positioned at reflector 40, and wherein reflector 40 can be in order to light reflection that light source 10 is sent to light-guiding mechanism 30.Aforementioned light-guiding mechanism 30 mainly comprises a light guide plate 31 and an extended structure 32, wherein light guide plate 31 has a thickness d in Z-direction, 32 of extended structures have a triangular-section and are configured on the light guide plate 31, aforementioned light guide plate 31 left ends and extended structure 32 common formation one planes of incidence 30 ', and reflector 40 is adjacent to aforementioned incidence surface 30 '.

Will be appreciated that, aforementioned keys K is arranged on the light guide plate 31 and is positioned at a side of extended structure 32, the light that light source 20 sends can enter in the light guide plate 31 (shown in the direction of arrow among Fig. 2) via this plane of incidence 30 ', then can be by light guide plate 30 with the key zone A of ray guidance to button K institute position place, so as to making the suitable brightness of button K generation.In the present embodiment, aforementioned extended structure has one first reflecting surface 321, and the light that light source 20 sends can be by entering in the light guide plate 31 after 321 reflections of the first reflecting surface; In addition, light guide plate 31 has a bottom surface 311 (as shown in Figure 2) in addition, and aforementioned bottom surface 311 is as one second reflecting surface, in order to the light guide plate 31 interior light that transmit are reflected towards the top, so that button K produces luminous effect.

In Fig. 2, because button K is configured on the light guide plate 30, and the thickness d of light guide plate 30 can have influence on the thickness of whole illuminated keyboard, therefore the present invention is by the area that increases incidence surface, the amount that enters light-guiding mechanism 30 to promote light that light source 20 sent, but can't increase the thickness of whole illuminated keyboard.More specifically, because the plane of incidence 30 ' in light-guiding mechanism 30 left sides is along having a height h on the Z-direction, wherein h＞d so can effectively increase the area that light enters light guide plate 30, simultaneously can reduce loss and the loss of light, and then promote significantly the usefulness of light-guiding mechanism 30.

Then see also again Fig. 3, the illuminated keyboard of another embodiment of the present invention mainly is to dispose extended

structure

32,33 in the upper and lower both sides of light guide plate 31, wherein light guide plate 31 left ends and extended structure 32, the 33 common planes of incidence 30 that form ", can increase whereby the incident area of light and promote the usefulness of light-guiding mechanism 30.In the present embodiment, the aforementioned plane of incidence 30 " roughly the height H with light source 20 is suitable for height on Z-direction, can more effectively ray guidance be entered (shown in the direction of arrow among Fig. 3) in the light guide plate 30 whereby.

What need special instruction is, aforementioned

extended structure

32,33 and light guide plate 31 all be with identical material made (for example leaded light material), wherein extended

structure

32,33 and light guide plate 31 can take integrated mode to make, also can interconnect by bonding mode in addition.

In sum, the invention provides a kind of illuminated keyboard, wherein by in a light guide plate at least one extended structure being set, can increase the area of the light-guiding mechanism plane of incidence, can reduce light loss and energy loss whereby, and then promote significantly its leaded light usefulness.

Although the present invention with concrete preferred embodiment openly as above; so it is not to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; still can do a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.

Claims

1. illuminated keyboard comprises:

One circuit board;

One light source is arranged on this circuit board;

One button, this button relatively this circuit board moves along a first direction; And

One light-guiding mechanism, comprise an interconnective light guide plate and an extended structure, this button is positioned on this light guide plate and a side of this extended structure, this extended structure and this light guide plate form a plane of incidence, this light source sends a light and enters this light guide plate via this plane of incidence, wherein this plane of incidence at the height on this first direction greater than the thickness of this light guide plate on this first direction, this extended structure is separately positioned on the opposition side of this light guide plate, and the height of the described plane of incidence on the described first direction roughly height with described light source is suitable.

2. illuminated keyboard according to claim 1, wherein this extended structure is identical material with this light guide plate.

3. illuminated keyboard according to claim 1, wherein this extended structure and this light guide plate are one-body molded.

4. illuminated keyboard according to claim 1, wherein this extended structure and this light guide plate are to interconnect in bonding mode.

5. illuminated keyboard according to claim 1, wherein this extended structure has a triangular-section, and this extended structure is configured on this light guide plate.

6. illuminated keyboard according to claim 1, wherein this extended structure has one first reflecting surface, and the light that this light source sends enters this light guide plate via this reflecting surface.

7. illuminated keyboard according to claim 1, wherein a bottom surface of this light guide plate is one second reflecting surface, in order to reflection ray.

8. illuminated keyboard according to claim 1, wherein this illuminated keyboard also comprises a reflector, be configured on this circuit board, and be positioned at by this plane of incidence, and this light source is positioned at this reflector.

9. illuminated keyboard according to claim 1, wherein this illuminated keyboard also comprises a switch module, is arranged on this circuit board, touches this switch module when this button is subjected to a pressed by external force.

10. portable electric device, wherein this portable electric device comprises illuminated keyboard according to claim 1.