CN201531765U

CN201531765U - White light lamp strip based on blue light LED

Info

Publication number: CN201531765U
Application number: CN2009202047327U
Authority: CN
Inventors: 梁宁
Original assignee: Konka Group Co Ltd
Current assignee: Konka Group Co Ltd
Priority date: 2009-09-11
Filing date: 2009-09-11
Publication date: 2010-07-21
Anticipated expiration: 2019-09-11

Abstract

The utility model provides a white light lamp strip based on a blue light LED. The white light lamp strip comprises an aluminum-based PCB circuit board, an LED lamp welded on the aluminum-based PCB circuit board and a transparent light gathering column which is winded on the LED lamp and is coated with yellow fluorescent powder, wherein the emergent outer surface of light rays of an LED lamp of the light gathering column is an arc shape, and the LED lamp is a blue light LED. The white light lamp strip leads light emitted by the blue light LED to turn to white light after passing through the yellow luminescent powder through using a blue light LED lamp and increasing the transparent light gathering column which is winded on the LED lamp and is coated with the yellow luminescent powder, and the white light is emitted to a light guiding board after light gathering of the light gathering column, the light beam gathers light towards the center surface of the light guiding board, and is emitted inside the light guiding board after being reflected, refracted and scattered-reflected less in the light guiding board, and since the go-around of reflection, refraction and scattered reflection is less, the white light lamp strip can keep stronger light intensity. And meanwhile, since the blue light LED lamp is adopted, the manufacture cost of the white light lamp strip is saved.

Description

A kind of white light bar based on blue-ray LED

Technical field

The utility model relates to the liquid crystal tv technology field, relates in particular to a kind of white light bar based on blue-ray LED.

Background technology

Along with the development of technology, ultra-thin liquid crystal TV set is becoming the main flow in market, and wherein, side LED liquid crystal TV set backlight is thinner, more cheap than straight-down negative LED liquid crystal TV set.

So-called side LED liquid crystal TV set backlight is meant both sides or four sides of led light source at LCDs, has tens at least, has tens LED lamps to be welded on the fillet shape aluminum base PCB wiring board at most, forms LED lamp bar.

As shown in Figure 1, in the back light that prior art side LED backlight forms, LED lamp bar 10 is made up of aluminum base PCB wiring board 11 and welding white LED lamp 12 thereon.The rising angle of white LED lamp 12 mainly concentrates on from the horizontal by positive and negative 60 degree, only indicated the emergent ray of rising angle among the figure for negative 60 degree, behind the shiny surface 21 of this light through LGP 20 upper surfaces, a part reflects (not indicating among the figure), a part reflects back into LGP, behind the silk-screen face 22 and reflecting paper 23 diffuse reflections of LGP bottom, produce more rays directive shiny surface 21, refraction and reflection take place, reverberation is directive silk-screen face 22 and reflecting paper 23 once more, continues to take place diffuse reflection, by that analogy, through behind a plurality of bouts, light arrives the far-end of LGP 20.As seen, the reflection of light process, refraction and diffuse reflection rounds are many more, and the light intensity of LGP far-end is weak more.For most of LED lamps, its angle of emergence mostly be positive and negative 60 the degree, the light of this angle will can arrive the LGP far-end after reflection, refraction and the diffuse reflection of too much bout, and the light intensity of far-end a little less than.Among Fig. 1, silk-screen face 22 and reflecting paper 23 are drawn altogether, represent with thick line, and shiny surface 21 usefulness fine rules are represented.

The utility model content

For this reason, technical problem to be solved in the utility model is: a kind of white light bar based on blue-ray LED is provided, makes light stronger through the light intensity that just can arrive LGP far-end and maintenance far-end behind less reflection, refraction and the diffuse reflection bout in LGP.

So, the utility model provides a kind of white light bar based on blue-ray LED, comprise aluminum base PCB wiring board, welding thereon the LED lamp and hold the transparent optically focused post that is coated with yellow fluorescent powder of described LED lamp, this optically focused post LED lamp wiring outgoing outer surface is an arc, and described LED lamp is a blue-ray LED.

Wherein, described optically focused post inside is provided with the groove that holds the LED lamp.

Connect about described groove, its inside is coated with yellow fluorescent powder.

Described groove is a square groove.

Perhaps, described groove is a rounded square bar groove.

A kind of white light bar described in the utility model based on blue-ray LED, by using blue LED lamp and increasing the transparent optically focused post that is coated with yellow fluorescent powder that holds the LED lamp, the light that makes blue-ray LED send becomes white light behind yellow fluorescent powder, behind described optically focused post optically focused, shine in the LGP again, this light beam is to LGP median plane optically focused, just can arrive the LGP far-end after in LGP, passing through less refraction and diffuse reflection bout, because the refraction and the diffuse reflection bout of process are less, therefore can keep stronger light intensity again.Simultaneously, owing to adopted blue LED lamp, saved the manufacturing cost of white light bar.

Description of drawings

Fig. 1 is the described side view LED back light of a background technology light channel structure schematic diagram;

Fig. 2 is the described white light bar structural representation based on blue-ray LED of the utility model embodiment;

Fig. 3 is optically focused post profile shown in Figure 2 and optically focused principle schematic;

Fig. 4 is the described side view LED back light of a utility model embodiment light channel structure schematic diagram.

The specific embodiment

Below, in conjunction with the accompanying drawings the utility model is described in detail.

As Fig. 2, shown in Figure 3, present embodiment provides a kind of white light bar 30 based on blue-ray LED, this lamp bar comprises aluminum base PCB wiring board 31, welds blue LED lamp 32 thereon and the transparent optically focused post 33 that holds blue LED lamp 32, and this optically focused post LED lamp wiring outgoing outer surface is an arc;

Wherein, for making that the light of injecting in the LGP is white light still, on described optically focused post 33, be coated with yellow fluorescent powder.

So, the light that blue LED lamp sends has become white light behind yellow fluorescent powder, white light is again behind the curved circular cylinder optically focused of optically focused post 33, restrain to the centre normal direction, after light after these convergences is injected LGP again, just the LGP far-end can be arrived through less refraction and diffuse reflection bout,, therefore when light arrives the LGP far-end, stronger light intensity can also be kept owing to reduce through superrefraction and irreflexive number of times.

As shown in Figure 4, after the emergent light of white light bar 30 enters LGP 20, because light and horizontal direction angle diminish, promptly spend less than 60 described in the background technology, light and horizontal direction angle are 30 degree among present embodiment Fig. 4, therefore, after the diffuse reflection of process LGP silk-screen face 22 and reflecting paper 23 and the refraction of shiny surface 21 and the reflection, just can arrive the LGP far-end through less reflection, refraction and diffuse reflection bout, owing to reduce through reflection, refraction and irreflexive number of times, therefore when light arrives the LGP far-end, can also keep stronger light intensity.

Further, the LED lamp can be held, the groove 331 that can hold the LED lamp can be provided with in optically focused post inside for guaranteeing optically focused post 33.

Because the LED lamp mostly is square patch LED, therefore, better be combined into one for guaranteeing optically focused post and LED lamp, described groove 331 is square groove or rounded square bar groove.

In sum, the described a kind of white light bar 30 of the utility model embodiment based on blue-ray LED, by using blue LED lamp 32, and increase holds the transparent optically focused post 33 that is coated with yellow fluorescent powder of LED lamp, the light that makes blue-ray LED send becomes white light behind yellow fluorescent powder, behind described optically focused post optically focused, shine in the LGP again, this light beam is to LGP median plane optically focused, the less reflection of process in LGP, just can arrive the LGP far-end behind refraction and the diffuse reflection bout, again because the reflection of process, refraction and diffuse reflection bout are less, therefore can also keep stronger light intensity.Simultaneously, owing to adopted blue LED lamp, saved the manufacturing cost of white light bar.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. white light bar based on blue-ray LED, comprise aluminum base PCB wiring board and welding LED lamp thereon, it is characterized in that, also comprise the transparent optically focused post that is coated with yellow fluorescent powder that holds described LED lamp, this optically focused post LED lamp wiring outgoing outer surface is an arc, and described LED lamp is a blue-ray LED.

2. white light bar according to claim 1 is characterized in that, described optically focused post inside is provided with the groove that holds the LED lamp.

3. white light bar according to claim 2 is characterized in that, connects about described groove, and its inside is coated with yellow fluorescent powder.

4. according to claim 2 or 3 described white light bars, it is characterized in that described groove is a square groove.

5. according to claim 2 or 3 described white light bars, it is characterized in that described groove is a rounded square bar groove.