CN101266039A

CN101266039A - Illuminating device and electronic device employing same

Info

Publication number: CN101266039A
Application number: CNA200710087667XA
Authority: CN
Inventors: 刘育男; 陈清景
Original assignee: Lite On Technology Corp
Current assignee: Lite On Technology Corp
Priority date: 2007-03-13
Filing date: 2007-03-13
Publication date: 2008-09-17

Abstract

The invention discloses a lighting device and an electronic device by using the lighting device. The lighting device comprises a light guide panel, a circuit board, at least a light source unit and a reflecting layer. The circuit board is arranged below the light guide panel, while the reflecting layer is arranged above the light guide panel. At least a hole is processed on the light guide panel, the light source unit is arranged on the circuit board and positioned in the hole, the reflecting layer is positioned above the hole. For example, the lighting device arranged on the side of the keyboard of an electronic device can provide illumination for the keyboard.

Description

Light-emitting device and the electronic installation of using it

Technical field

The present invention is about a kind of light-emitting device and use its electronic installation, and its electronic installation of the light-emitting device of relevant a kind of tool multiaspect light guide effect and application particularly.

Background technology

Electronic installation now is communication handset, PDA or digital camera etc. for example, for adapt to the user can be in the dark or the night time operation electronic installation to carry out function, generally all be equiped with the part of tool illumination functions.Because light emitting diode (light emitting diode, LED) or Organic Light Emitting Diode (organic light emittingdiode, OLED) have little, the no thermal radiation of volume, advantage such as power consumption is low and reaction speed is good, be used in widely in the illumination of many electronic installations in recent years.

Is example with light emitting diode as the keyboard illuminating source of communication handset, generally speaking, light emitting diode can be arranged on the circuit board of communication handset, and these light emitting diodes can be disposed at the keyboard below of communication handset, and also a LGP can be set between light emitting diode and keyboard.The light of light emitting diode can directly see through LGP and shine on the keyboard.Because light emitting diode has its specific light emitting region and luminous intensity, each button can both have enough briliancy on the keyboard in order to make, and all must dispose several light emitting diodes simultaneously to meet the demand in the practicality usually.But thus, the cost of communication handset is increased, also can increase whole power consumption.In addition, light emitting diode and LGP all have certain thickness, are arranged at the thickness that also can increase whole communication handset between circuit board and the keyboard.

Summary of the invention

The present invention is about a kind of light-emitting device and use its electronic installation, has a plurality of holes on the LGP of light-emitting device, and the light source of light-emitting device is arranged in the hole.The design that has special construction on the sidewall of LGP in hole, and hole is provided with a reflecting plate.When light source luminescent, can't import in the LGP and understand the penetration plate, thereby the light of light source can be from a plurality of positions and the light-emitting directions on the LGP whereby directly by the hole bright dipping.

The present invention proposes a kind of light-emitting device, and this device comprises a LGP, a circuit board, at least one light source cell and a reflecting layer.LGP comprises at least one hole.Circuit board is arranged at the below of LGP, and light source cell is arranged on the circuit board, and is positioned within the hole.The reflecting layer is provided with on the LGP, and is positioned at the top of hole.

The present invention reintroduces a kind of electronic installation, and this device comprises a keyboard and a light-emitting device.Light-emitting device comprises a LGP, a circuit board, at least one light source cell and a reflecting layer.LGP is arranged at a side of keyboard, and comprises at least one hole.Circuit board is arranged at the below of LGP, and light source cell is arranged on the circuit board, and is positioned within the hole.The reflecting layer is provided with on the LGP, and is positioned at the top of hole, reflecting layer and between keyboard and LGP.

For foregoing of the present invention can be become apparent, now especially exemplified by a preferred embodiment, and conjunction with figs. is elaborated as follows:

Description of drawings

Figure 1A is the stereogram according to the light-emitting device of a preferred embodiment of the present invention.

Figure 1B is the three-dimensional exploded view of Figure 1A light-emitting device.

Fig. 2 A is the cut-away view of the LGP tool ramped side walls of Figure 1A light-emitting device.

Fig. 2 B is the cut-away view of LGP tool V-groove (V-cut) sidewall of Figure 1A light-emitting device.

Fig. 3 is the part three-dimensional exploded view according to the electronic installation of a preferred embodiment of the present invention.

The specific embodiment

Please refer to Figure 1A～1B, Figure 1A is the stereogram according to the light-emitting device of a preferred embodiment of the present invention, and Figure 1B is the three-dimensional exploded view of Figure 1A light-emitting device.Shown in Figure 1A～1B, light-emitting device 1 comprise a LGP 10, a circuit board 12, at least one light source cell 14, with a reflecting layer 16.LGP 10 comprises at least one hole 18.Circuit board 12 is arranged at the below of

LGP

10,16 tops that are arranged at LGP 10, reflecting layer.Light source cell 14 is arranged on the circuit board 12, and is positioned at

hole

18,16 tops that are positioned at hole 18, reflecting layer.Wherein, when light source cell 14 is driven when luminous, its light can enter LGP 10 by penetration layer 16, and propagates by LGP 10.

Shown in Figure 1B, present embodiment is to comprise several holes 18 with LGP 10, then is provided with several light source cells 14 on the circuit board 12 and does explanation for example.Light source cell 14 for example comprises an at least one LED encapsulation body or a light-emitting diode chip for backlight unit, and it is arranged on the circuit board 12 and with circuit board 12 and electrically connects.The LED encapsulation body of light source cell 14 or light-emitting diode chip for backlight unit are to drive luminous by circuit board 12.Preferably, be provided with a light source cell 14 in the hole 18, that is to say that light source cell 14 is all good with the quantity of hole 18 mutually.

Structure as for hole 18 on the LGP 10 please refer to Fig. 2 A, and it is the cut-away view of the LGP tool ramped side walls of Figure 1A light-emitting device.Light source cell 14 is actually by at least one sidewall 10A around the hole 18 and enters in the LGP 10, thereby the path that can will transmit according to light source cell 14 luminous light and the direction pattern of removing to design hole 18.This sidewall 10A is connected in the upper surface and the lower surface of LGP 10, and sidewall 10A makes it become an inclined-plane or a cambered surface etc. preferably non-perpendicular to the upper surface or the lower surface of LGP 10.The shape of hole 18 for example is rectangle, circle, ellipse etc.See Figure 1B, present embodiment is that the hole 18 that has a rectangle with LGP 10 is that example is done explanation.Shown in Fig. 2 A, the sidewall 10A of LGP 10 in hole 18 is an inclined-plane.When the light source cell 14 that is arranged in hole 18 is luminous, because reflecting layer 16 is arranged at hole 18 tops, make light L directly to throw away by hole 18, can be reflected layer 16 reflection and entered in the LGP 10 by the sidewall 10A in the hole 18 of light this moment (for example L1 of Fig. 2 A, L2) are propagated by LGP 10 again.By the angle design between inclined-plane and upper surface and the lower surface in the LGP 10, can adjust the incident angle of light.Certainly, the inclined-plane among Fig. 2 A also can replace with cambered surface.

The design of another kind of hole please refer to Fig. 2 B, and it is the cut-away view of the LGP tool V-groove sidewall of Figure 1A light-emitting device.Shown in Fig. 2 B, have many continuous V-grooves on the sidewall 10A ' of LGP 10 in hole 18 ', when light source cell 14 was luminous, its light (for example L1 ' of Fig. 2 B, L2 ') can reflex to the V-groove place by reflecting layer 16.Because these V-grooves respectively have two planes of incidence, have increased the variation of angle of light degree widely.

The effect that reflecting layer 16 is set above LGP 10 is, because light source cell 14 is made up of light-emitting diode chip for backlight unit or LED encapsulation body, the direction of its high light can be in the direction that is close to perpendicular to LGP 10 upper surfaces or lower surface.Thereby when light-emitting diode chip for backlight unit or LED encapsulation body are luminous, its light can be directly by hole 18 or 18 ' projection and go out, large-scale illumination can't be provided.If a reflecting layer 16 is set on hole 18 or 18 ', then the light of light source cell 14 can be imported in the LGP 10 by

sidewall

10A or 10A ', strengthen illumination zone by LGP 10, and its light is evenly dispersed.

Though the light-emitting device 1 of present embodiment is to be that example is done explanation so that a light source cell 14 to be set in the hole 18, yet when in fact using, also can in a hole 18 several light source cells be set simultaneously.Any so long as in LGP 10 upper sheds, and single or multiple light source cells are embedded design in the openings, all belong to category of the present invention.In addition, though the light source cell 14 of the light-emitting device 1 of present embodiment is to be that example is done explanation with light-emitting diode chip for backlight unit or LED encapsulation body, the present invention is not as qualification.Light source cell 14 also can be other for example be organic electroluminescent element (organicelectro-luminescence device, OELD) or Organic Light Emitting Diode (Organic LightEmitting Diode, OLED) etc.

Light-emitting device 1 mainly can be used for the keyboard illumination of general electronic installation and uses.Please refer to Fig. 3, it is the part three-dimensional exploded view according to the electronic installation of a preferred embodiment of the present invention.As shown in Figure 3, electronic installation 100 comprises a keyboard 110 and a luminescence component 120, and this luminescence component 120 is arranged at a side of keyboard 110.Keyboard 110 for example comprises a plurality of buttons 111, and these buttons 111 for example become the configuration of three files.These buttons 111 numeral, symbol or letter (diagram of present embodiment only comprises numeral and symbol) part light-permeable or semi-transparent thereon provides the illumination of keyboard 110 to use when being used to dark place or night.Luminescence component 120 comprises the design of aforementioned light-emitting device 1 (seeing Figure 1A).Preferably, be the configuration of the button 111 among collocation Fig. 3, luminescence component 120 can become the light source cell 14 ' institute of two files arrangement to form by LGP 10 ', circuit board 12 ', two reflecting layer 16 ' with several.Reflecting layer 16 ' and light source cell 14 ' for example are corresponding being arranged on the keyboard 110 between the first file R1 and the second file R1, and correspondence is provided with between the second file R2 and the 3rd file R3.When all light source cells 14 ' are driven when luminous by circuit board 12 ', its light can and import in the LGP 10 ' by reflecting layer 16 ' reflection, make the light uniform irradiation in each button 111 places whereby.

Certainly, though the electronic installation 100 of present embodiment is to have two reflecting layer 16 ' with luminescence component 120 to become light source cell 14 elements such as grade of two files arrangement to be constituted with several, and light source cell 14 is that correspondence is arranged on the keyboard 110 and does explanation for example between each file, but the present invention is not as qualification.When in fact using, hole location on the LGP 10 ' of electronic installation 100 and shape thereof are to go design according to demand, can see through LGP 10 ' in order to do the light that makes light source cell 14 ' and diffuse to equably on the keyboard 110.

Compared to the leaded light mode that traditionally light source of light emitting diode is arranged at the LGP below, it can design the hole 18 of arbitrary shape the light-emitting device 1 (seeing Figure 1B) of present embodiment on LGP 10, designs such as inclined-plane by hole 18 madial wall 10A or V-groove just can be controlled the rising angle and the direction of light, make the effect of light tool multiaspect diffusion.In addition, light source cell 14 is arranged in the hole 18 of LGP 10, and the integral thickness of device is reduced.Moreover because hole 18 is provided with reflecting layer 16 and light source cell 14 is directly to embed in the LGP 10, the light of light source cell 14 can directly enter LGP 10 by reflecting layer 16 reflections, and then lowers the light loss consumption and the raising light utilization efficiency.

Light-emitting device that the above embodiment of the present invention disclosed and the electronic installation of using it, the LGP of light-emitting device has the hole of special construction, and its light source cell is arranged on the circuit board and embed in the hole of LGP, and when making light source cell luminous, its light can see through hole convert light direction.Whereby to adjust the light direction and the position of light, to reach the effect that multiaspect light utilizes.The very simple and assembling of the structure of light-emitting device is arranged at light-emitting device in the electronic installation and uses with the illumination that keyboard is provided easily so that on the keyboard luminous evenly, and be the way of an economic material benefit.

In sum, though the present invention with preferred embodiment announcement as above, yet it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when doing various changes that are equal to and retouching.Therefore, protection scope of the present invention is when looking accompanying being as the criterion that the application's claim scope defined.

Claims

1. light-emitting device comprises:

One LGP comprises at least one hole;

One circuit board is arranged at the below of this LGP;

At least one light source cell is arranged on this circuit board, and is positioned within this hole; And

One reflecting layer is arranged on this LGP, and is positioned at the top of this hole.

2. light-emitting device as claimed in claim 1, it is characterized in that this circuit board has at least one sidewall in this hole, this LGP has a upper surface and a lower surface, and this sidewall connects this upper surface and this lower surface, and the light of this light source cell is to enter this LGP by this sidewall.

3. light-emitting device as claimed in claim 2 is characterized in that this sidewall in this hole is non-perpendicular to this upper surface or this lower surface.

4. light-emitting device as claimed in claim 2 is characterized in that this sidewall in this hole comprises an inclined-plane.

5. light-emitting device as claimed in claim 2 is characterized in that this sidewall in this hole comprises a cambered surface.

6. light-emitting device as claimed in claim 2 is characterized in that having a plurality of continuous V-grooves on this sidewall of this hole.

7. light-emitting device as claimed in claim 1 is characterized in that this LGP comprises a plurality of holes, and this circuit board is provided with a plurality of light source cells corresponding to these pore quantities, and these light source cells lay respectively in these holes.

8. light-emitting device as claimed in claim 1 is characterized in that this light source cell comprises at least one LED encapsulation body.

9. light-emitting device as claimed in claim 1 is characterized in that this light source cell comprises at least one light-emitting diode chip for backlight unit.

10. the electronic installation of employing such as the described light-emitting device of claim 1 to 9 is characterized in that also comprising a keyboard; Wherein this reflecting layer is to be arranged between this keyboard and this LGP.