CN201875553U

CN201875553U - LED (light-emitting diode) backlight source with high brightness

Info

Publication number: CN201875553U
Application number: CN2010205584730U
Authority: CN
Inventors: 朴明求; 徐载沅; 郑载衡
Original assignee: Kumho Lcd Shenzhen Co ltd
Current assignee: Kumho Lcd Shenzhen Co ltd
Priority date: 2010-10-11
Filing date: 2010-10-11
Publication date: 2011-06-22
Anticipated expiration: 2020-10-11

Abstract

The utility model relates to the field of backlight sources, in particular to an LED backlight source with high brightness. Light reflecting modules provided with arc curved surfaces are arranged on the base plate of an LED chip of the LED backlight source, and each arc curved surface has the directed focusing function to the light rays of the LED chip, so that the curvature and the position of each arc curved surface can be adjusted to focus the light rays, which are emitted by an LED outwards, to the direction where the backlight source is required to irradiate; not only is the light ray irradiating distance increased in an effective area, but also the light ray loss is effectively prevented to improve the lighting effect and the irradiation brightness of the LED backlight source. Moreover, the arc curved surfaces of the light reflecting modules, which are opposite in pairs, are arranged asymmetrically, so that the brightness required by the large-size backlight far edge and the degree of uniformity required by single edge incidence can be obtained. In addition, the plurality of light reflecting modules are arranged to prevent the deformation of the light reflecting modules on the linear base plate, and further to improve the lighting effect and the uniformity of the LED backlight source.

Description

A kind of LED-backlit source of high brightness

[technical field]

The utility model relates to the backlight field, specifically refers to a kind of LED-backlit source of high brightness.

[background technology]

The development of backlight can be traced back in World War II, uses the backlight of microminiature tengsten lamp as aircraft instrument at that time.Along with the continuous development of lcd technology, the employed backlight of LCD has the brightness height, long, luminous characteristics such as evenly of life-span.Mainly contain two kinds of type of backlight of CCFL and LED at present, then be divided into side-light type and straight-down negative according to distribution of light sources position difference.Side-light type is the most frequently used has LED-backlit and CCFL backlight.Along with the LCD module constantly develops to brighter, lighter, thinner direction, side-light type CCFL formula backlight becomes the main flow of present backlight development.Because CCFL (Cold Cathode Fluorescent Lamps on the traditional LC D display device, cold-cathode fluorescence lamp) some inadequate natural endowment of backlight technology and product, for example colour gamut is narrow, low its power consumption of energy utilization rate is higher and the life-span is short and small etc., so people are seeking its substitute technology and product always, and in this process, the LED-backlit technical products just has been included into people's the category of selecting for use.

Because the LED-backlit source is the spot light that adopts, improve the brightness in LED-backlit source as desire, certainly will need to increase the quantity of LED, what bring thus is the increase of energy consumption and heat, thereby the light utilization efficiency that how to improve LED is the problem of industry research.

[utility model content]

The utility model purpose is to solve the above problems, and a kind of LED-backlit source of reasonable in design, dependable performance high brightness is provided.

A kind of LED-backlit source of high brightness comprises substrate and a plurality of led chip, and led chip is linear array on substrate; Described substrate is provided with at least one rectangular reflective module, this reflective module is that cover places on the led chip, in the reflective module on substrate linearly aligned two interior surface opposing be to be the different arc-shaped concave of arc curvature, each inner surface of reflective module is arc-shaped concave, and the arc curvature of inner surface facing each other is different.

Preferably, the curvature of described asymmetric curved surface is provided with in response to the size of LGP.

Described reflective module is a rectangle block that forms in response to the size of substrate, its upper end is uncovered, its all around inner surface distinguish curved indent downwards from the upper end to form asymmetric curved surface, the linear groove that connects about being formed with below the reflective module, this linear groove passes to mutually with curved surface and makes led chip pass through.

The width of described linear groove is greater than the led chip width.

The lower surface of described reflective module is provided with the protruding pin of a plurality of cooperations.

Described reflective module is provided with a plurality of being arranged on the pcb board.

Described reflective module inner surface is provided with reflector layer.

The utility model is owing to be provided with the reflective module of arc-shaped curved surface at the substrate of the led chip in LED-backlit source, utilize each arc-shaped curved surface that the light of led chip is had directed optically focused effect, regulate the curvature and the position of curved surface, can make the light of the outside scattering of LED converge at the direction that backlight need shine, not only increase the distance of light in the effective coverage irradiation, also effectively prevent light losing, to improve the light efficiency and the irradiation brightness in LED-backlit source.In addition, this reflective module arc-shaped curved surface facing each other is asymmetric setting, the required uniformity in the time of can obtaining required brightness of large scale distal edge backlight and monolateral incident.In addition, being provided with of a plurality of reflective module can prevent that reflective module is out of shape on the substrate of linearity, further improved the light efficiency and the uniformity in LED-backlit source.

[description of drawings]

Fig. 1 is a partial structurtes schematic diagram of the present utility model;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is a cross-sectional view of the present utility model;

Fig. 4 is a side view of the present utility model;

Fig. 5 is user mode figure of the present utility model.

[specific embodiment]

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Be to be understood that concrete embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As shown in Figure 1 to Figure 3, LED-backlit source structure of the present utility model, it comprises a substrate 1, a plurality of led chip 2 and a plurality of reflective module 3.

Described substrate 1 is the linear plate of a strip, and led chip 2 is to be being arranged on this substrate 1 of line; Cooperate shown in Fig. 4,5, reflective module 3 is a rectangle block that forms in response to substrate 1 size, its upper end is uncovered, inner surface is distinguished curved indent downwards to form asymmetric curved surface 32 before and after it from the upper end, and left and right sides inner surface also from the upper end divide downwards cut to pieces curved in indent form asymmetric curved surface 33, and the curvature of this asymmetric

curved surface

32,33 is in response to the length of LGP 4 and width and be provided with; Be formed with the linear groove 34 of perforation below reflective module 3, this linear groove 34 communicates with arc-shaped

curved surface

32,33, and the width of this linear groove 34 is the width greater than led chip 2; On the lower surface of reflective module 3, be provided with the protruding pin 35 of a plurality of cooperations, the corresponding embedding hole that cooperates with protruding pin 35 that on substrate 1, is provided with in addition.

Described reflective module 3 can directly be adopted metallic plate and be made, and utilizes the reflective characteristic of metal, or is coated with reflector layer on the module arc-shaped

curved surface

32,33 that nonmetallic materials are made, or the other materials that is coated with reflecting surface can be realized reflective effect equally.

During combination, each reflective module 3 is to be arranged in order and to utilize its protruding pin 35 to be mounted on the substrate 1, and simultaneously each led chip 2 is stretched out by its linear groove 34, to make each led chip 2 quilt cover place the arc-shaped

curved surface

32,33 of this reflective module 3, utilize the principle of reflection of concave mirror, the light that this reflective module 3 is sent the LED spot light converge by this arc-shaped

curved surface

32,33 and by uncovered orientation to the effective coverage internal radiation, to prevent the loss of light in non-light-emitting area, increase the distance and the effective coverage brightness of light irradiation, to improve the light efficiency of effective coverage; In addition, the setting of this asymmetric reflecting

curved surface

32,33 can obtain the required brightness of large scale distal edge backlight, the uniformity of light in the time of can guaranteeing simultaneously large scale monolateral incident backlight again.Certainly, this reflective module 3 can be set to one in response to the length of substrate 1, because linear substrate 1 length is longer, for preventing the distortion of reflective module 3, be set to a plurality of and be arranged on the substrate 1 better the reflective accuracy of led chip 2 light, other cooperates the design of the asymmetric arc-shaped curved surface 33 of each reflective module 3 left and right sides inner surface, can avoid each reflective module 3 combination back to produce light " blind area ", has further improved the light efficiency and the uniformity in LED-backlit source.

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

Claims

1. the LED-backlit source of a high brightness, comprise substrate and a plurality of led chip, led chip is linear array on substrate, it is characterized in that: substrate is provided with at least one rectangular reflective module, this reflective module is that cover places on the led chip, in the reflective module on substrate linearly aligned two interior surface opposing be to be the different arc-shaped concave of arc curvature, each inner surface of reflective module is arc-shaped concave, and the arc curvature of inner surface facing each other is different.

2. the LED-backlit source of high brightness according to claim 1, it is characterized in that: the curvature of described asymmetric curved surface is provided with in response to the size of LGP.

3. the LED-backlit source of high brightness according to claim 1, it is characterized in that: reflective module is a rectangle block that forms in response to the size of substrate, its upper end is uncovered, its all around inner surface distinguish curved indent downwards from the upper end to form asymmetric curved surface, the linear groove that connects about being formed with below the reflective module, this linear groove passes to mutually with curved surface and makes led chip pass through.

4. the LED-backlit source of high brightness according to claim 3, it is characterized in that: the width of linear groove is greater than the led chip width.

5. according to the LED-backlit source of claim 1 or 3 described high brightness, it is characterized in that: the lower surface of reflective module is provided with the protruding pin of a plurality of cooperations.

6. according to the LED-backlit source of claim 1 or 3 described high brightness, it is characterized in that: reflective module is provided with a plurality of being arranged on the pcb board.

7. the LED-backlit source of high brightness according to claim 1, it is characterized in that: the reflective module inner surface is provided with reflector layer.