CN203298083U

CN203298083U - Plane LED light source and side-in type backlight module thereof

Info

Publication number: CN203298083U
Application number: CN2013202855081U
Authority: CN
Inventors: 熊书明; 黄建发
Original assignee: Tcl Hong Qi Technology (huizhou) Co Ltd
Current assignee: Tcl Huarui Lighting Technology Huizhou Co ltd; Very Optoelectronics Huizhou Co Ltd
Priority date: 2013-05-23
Filing date: 2013-05-23
Publication date: 2013-11-20
Anticipated expiration: 2023-05-23

Abstract

The utility model discloses a plane LED light source and a side-in type backlight module of the plane LED light source. The plane LED light source comprises a substrate, an LED chip and a fluorescent colloid. The LED chip is arranged on the substrate, and the fluorescent colloid covers the LED chip. A columnar transparent body is further arranged on the substrate and located on the outer side of the fluorescent colloid. The outer surface of the transparent body is in a protruded arc shape matched with a light-emitting face of the LED chip. Due to the fact that the columnar transparent body with the outer surface in the protruded arc shape is utilized, the refraction characteristic of light rays is utilized by the transparent body to change the angle of light rays emitted by the LED chip, so that light condensing is performed before the light rays enter a light guide plate, and the light-emitting angle of an LED light source is reduced. Thus, more light rays can be refracted to enter the light guide plate, the light-emitting efficiency of the light guide plate is naturally improved, and the light guide plate can be favorably made to be quite thin. Meanwhile, the problem of light leaking of the side-in backlight module is solved, cost is low and the effect is good.

Description

A kind of planar LED light source and side entrance back module thereof

Technical field

The utility model relates to the side entering-type LED backlight source domain, in particular a kind of planar LED light source that can low-costly reduce side entrance back module light leak problem, promote the LGP light extraction efficiency.

Background technology

As shown in Figure 1, Fig. 1 is the schematic perspective view of prior art midplane LED light source, traditional planar LED light source mostly is strip, its disconnected cross section is rectangle, can see substrate 110 and the fluorescent colloid 120 (being the mixture of fluorescent material and silica gel) that is arranged on this substrate 110 from outward appearance, the surface of described fluorescent colloid 120 becomes a plane with the flush of described substrate 110.

In conjunction with shown in Figure 2, Fig. 2 is the principle of luminosity schematic diagram of prior art midplane LED light source, in fact also be provided with a LED luminescence chip 130 in the inside of this planar LED light source, this LED luminescence chip 130 can send blue light when energising, be excited into white light by described fluorescent colloid 120, then enter from the side of LGP 140, to play the effect of backlight.

But, the lighting angle of this conventional planar LED light source is larger, its angle is generally more than 110 degree, make thus the side entrance back module easily produce the problem of light leak, not only improved unreasonably the making tolerance of planar LED light source, often must improve light leakage phenomena by the thickness that adds thick light guiding plate, obviously increase production cost.

Therefore, prior art still haves much room for improvement and develops.

The utility model content

For solving the problems of the technologies described above, the utility model provides a kind of planar LED light source, can low-costly reduce the light leak of side entrance back module and the light extraction efficiency of lifting LGP.

Simultaneously, the utility model also provides a kind of side entrance back module, and cost is low, light leak is few, light extraction efficiency is high.

The technical solution of the utility model is as follows: a kind of planar LED light source, comprise substrate, LED chip and fluorescent colloid, described LED chip is arranged on described substrate, described fluorescent colloid covers on LED chip, wherein, also be provided with a column transparent body on described substrate, the described transparent body is positioned at the described fluorescent colloid outside, and the outer surface of the described transparent body is the convex of adaptive described LED chip light-emitting area.

Described planar LED light source, wherein: be provided with two ends and be communicated with the cylindrical air layer in the external world between described transparent body convex surface and described fluorescent colloid surface, described air layer is plane towards the inner surface of described LED chip light-emitting area one side, and described cylindrical air layer is the arcs of recesses of adaptive described LED chip light-emitting area towards the inner surface of described transparent body outer surface one side.

Described planar LED light source, wherein: the radian of described cylindrical air layer arcs of recesses inner surface is less than the radian of described transparent body outer surface.

Described planar LED light source, wherein: be provided with groove on described substrate, described LED chip is arranged on the baseplane of described groove, and described fluorescent colloid is full of described groove.

Described planar LED light source, wherein: the sidewall of described groove both sides is the outer bell mouth shape of symmetrical inclination.

A kind of side entrance back module, comprise LED light source, and wherein: described LED light source is the described planar LED light source of above-mentioned middle any one.

a kind of planar LED light source provided by the utility model and side entrance back module thereof, owing to having adopted cylindrical outer surface to be the transparent body of convex, the transparent body utilizes the refracting characteristic of light to change the angle that LED chip emits beam, make light first carry out optically focused before entering LGP, reduced the lighting angle of LED light source, make thus more light refrangible enter LGP, naturally just promoted the light extraction efficiency of LGP, also help and do LGP very thin, also improved simultaneously the light leak problem of side entrance back module, and cost is low, effective.

Description of drawings

Fig. 1 is the schematic perspective view of prior art midplane LED light source.

Fig. 2 is the principle of luminosity schematic diagram of prior art midplane LED light source.

Fig. 3 is the schematic perspective view of the utility model planar LED light source embodiment one.

Fig. 4 is the principle of luminosity schematic diagram of the utility model planar LED light source embodiment one.

Fig. 5 is the schematic perspective view of the utility model planar LED light source embodiment two.

Fig. 6 is the principle of luminosity schematic diagram of the utility model planar LED light source embodiment two.

The specific embodiment

Below with reference to accompanying drawing, the specific embodiment of the present utility model and embodiment are described in detail, described specific embodiment, only in order to explain the utility model, not is used for limiting the specific embodiment of the present utility model.

As shown in Figure 3, Fig. 3 is the schematic perspective view of the utility model planar LED light source embodiment one, different from traditional planar LED light source is, from the appearance, also be provided with the solid transparent body 250 of a column in light-emitting area one side of substrate 210, on manufacture craft, usable resins or silica gel are one-body molded by mould pressing process, and the light that is used for the planar LED light source is sent carries out light collecting refraction.

the internal structure that it is concrete, can be in conjunction with shown in Figure 4, Fig. 4 is the principle of luminosity schematic diagram of the utility model planar LED light source embodiment one, be provided with LED chip 230 and fluorescent colloid 220 thereof on described substrate 210, the described transparent body 250 is solid construction, and be arranged on the outside of described fluorescent colloid 220, and the outline line of these transparent body 250 cylindrical outer surface is convex, size with adaptive described LED chip 230 light-emitting areas, the radian of the described transparent body 250 convex outer surfaces can be made corresponding adjustment according to coupling electrical distance and the rising angle demand of LGP 240, the refraction action that 250 pairs of described LED chips 230 of the transparent body by this solid construction emit beam, make light carry out optically focused before entering LGP 240, reduced the light leak problem of side entrance back module, the thickness that also is conducive to this LGP 240 of attenuate.

As shown in Figure 5, Fig. 5 is the schematic perspective view of the utility model planar LED light source embodiment two, different from the utility model planar LED light source embodiment one is, from the appearance, in the light-emitting area one side setting of substrate 310 are hollow transparent bodies 350 of a column, on manufacture craft, also usable resins or silica gel are one-body molded by mould pressing process, and the light that is used for the planar LED light source is sent carries out light collecting refraction.

the internal structure that it is concrete, can be in conjunction with shown in Figure 6, Fig. 6 is the principle of luminosity schematic diagram of the utility model planar LED light source embodiment two, be provided with equally LED chip 330 and fluorescent colloid 320 thereof on described substrate 310, yet the described transparent body 350 is hollow-core construction, and be arranged on the outside of described fluorescent colloid 320, and the outline line of these transparent body 350 cylindrical outer surface also is convex, size with adaptive described LED chip 330 light-emitting areas, so-called hollow-core construction can be that the air layer 360 of a column is set between the described transparent body 350 convex surfaces and described fluorescent colloid 320 surfaces, the two ends of described air layer 360 are communicated with extraneous, the radian of the described transparent body 350 convex outer surfaces also can be made corresponding adjustment according to coupling electrical distance and the rising angle demand of LGP 340, the refraction action that emits beam by this 350 pairs of described LED chips 330 of the transparent body with hollow-core construction, equally also can make light carry out optically focused before entering LGP 340, also can play thus the effect of these LGP 340 thickness of attenuate, but also can reduce the material usage of the described transparent body 350.

in the utility model planar LED light source embodiment one and embodiment two, can set out a groove 211 (or 311) on described substrate 210 (or 310), described LED chip 230 (or 330) is arranged on the baseplane of described groove 211 (or 311), described fluorescent colloid 220 (or 320) is full of described groove 211 (or 311), and the surface of the outstanding described substrate 210 (or 310) of the cylinder surface of the described transparent body 250 (or 350) and fluorescent colloid 220 (or 320), with the light-emitting area that widens described LED chip 230 (or 330) and the distance between the described transparent body 250 (or 350), improve the spotlight effect of the described transparent body 250 (or 350), and make the structure of planar LED light source compacter.

Be preferably, the sidewall of described groove 211 (or 311) both sides is the outer bell mouth shape of symmetrical inclination, with the sidewall at right angle, compares, and the sidewall of inclination helps to save the materials of described fluorescent colloid 220 (or 320).

in the utility model planar LED light source embodiment two, described cylindrical air layer 360 is plane towards the inner surface of described LED chip 330 light-emitting area one sides, described cylindrical air layer 360 is arcs of recesses towards the inner surface of the described transparent body 350 cylindrical outer surface one sides, not only the radian of the described transparent body 350 convex outer surfaces can be made corresponding adjustment according to coupling electrical distance and the rising angle demand of LGP 340, and the radian of the arcs of recesses inner surface of described air layer 360 also can be made corresponding adjustment according to coupling electrical distance and the rising angle demand of LGP 340, be preferably, described cylindrical air layer 360 arcs of recesses inner surface radian are less than the radian of these transparent body 350 cylindrical outer surface, can further improve the spotlight effect of the described transparent body 350 thus.

Based on above-mentioned planar LED light source, the utility model has also proposed a kind of low cost, the high side entrance back module of light extraction efficiency that light leak is few, comprises LED light source, and wherein: described LED light source is the described planar LED light source of above-mentioned any one embodiment.

Should be understood that; the foregoing is only preferred embodiment of the present utility model; be not sufficient to limit the technical solution of the utility model; for those of ordinary skills; within spirit of the present utility model and principle; can be increased and decreased according to the above description, replacement, conversion or improvement, and all these increases and decreases, replacement, conversion or improve after technical scheme, all should belong to the protection domain of the utility model claims.

Claims

1. planar LED light source, comprise substrate, LED chip and fluorescent colloid, described LED chip is arranged on described substrate, described fluorescent colloid covers on LED chip, it is characterized in that, also be provided with a column transparent body on described substrate, the described transparent body is positioned at the described fluorescent colloid outside, and the outer surface of the described transparent body is the convex of adaptive described LED chip light-emitting area.

2. planar LED light source according to claim 1, it is characterized in that: be provided with two ends and be communicated with the cylindrical air layer in the external world between described transparent body convex surface and described fluorescent colloid surface, described air layer is plane towards the inner surface of described LED chip light-emitting area one side, and described cylindrical air layer is the arcs of recesses of adaptive described LED chip light-emitting area towards the inner surface of described transparent body outer surface one side.

3. planar LED light source according to claim 2, it is characterized in that: the radian of described cylindrical air layer arcs of recesses inner surface is less than the radian of described transparent body outer surface.

4. planar LED light source according to claim 1, it is characterized in that: be provided with groove on described substrate, described LED chip is arranged on the baseplane of described groove, and described fluorescent colloid is full of described groove.

5. planar LED light source according to claim 4 is characterized in that: the sidewall of described groove both sides is the symmetrical outer bell mouth shape that tilts.

6. a side entrance back module, comprise LED light source, it is characterized in that: described LED light source is the described planar LED light source of any one in claim 1 to 5.