CN101430064A

CN101430064A - LED back light source structure

Info

Publication number: CN101430064A
Application number: CNA2008100722939A
Authority: CN
Inventors: 林瑞梅
Original assignee: XIAMEN GUANGPU DISPLAY TECHNIQUE CO Ltd
Current assignee: XIAMEN GUANGPU DISPLAY TECHNIQUE CO Ltd
Priority date: 2008-12-08
Filing date: 2008-12-08
Publication date: 2009-05-13

Abstract

The invention discloses an LED backlight source structure, comprising a substrate and a plurality of LED chips, the LED chips are linearly arranged on the substrate; wherein, at least one rectangular reflective module is arranged on the substrate, the reflective module is covered on the LED chips, the various inner surfaces of the reflective module are arc-shaped concave surfaces, and the arc curvatures of each two opposite inner surfaces are different. The LED backlight source structure utilizes that the arc-shaped concave surfaces can directionally condense the light of the LED chips and can converge the light which is scattered to the outside by the LED to the direction which needs to irradiate by a backlight source, so that the LED backlight source structure can not only increase the irradiation distance of the light in an effective region, but also prevent the loss of the light in a non-effective light-emitting region of the backlight source, thus improving the luminous efficiency of the LED backlight source in the effective region and increasing the irradiation brightness of the backlight source in the effective region; in addition, the setting of the non-symmetric reflective curved surfaces can obtain the brightness which is needed by the distal edge of a large-sized backlight and ensure the uniformity of the light of the large-sized backlight during the unilateral incidence.

Description

The LED-backlit source structure

Technical field

The present invention relates to the optics and the image processing field of electronic equipment, be meant a kind of LED-backlit source structure that is applied to LCD especially.

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 three kinds of type of backlight of EL, 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 CathodeFluorescent 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.

Summary of the invention

The object of the present invention is to provide a kind of light utilization efficiency that can effectively improve LED, to improve the LED-backlit source structure of backlight illumination.

For achieving the above object, solution of the present invention is: a kind of LED-backlit source structure, comprise substrate and a plurality of led chip, and led chip is linear array on substrate; Wherein: substrate is provided with at least one rectangular reflective module, and this reflective module is to be arranged on the substrate, and each inner surface of reflective module is an arc-shaped concave, and the arc curvature of inner surface facing each other is different.

Described reflective module is a rectangle block that forms in response to the size of counterpart 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 curvature of described asymmetric curved surface is provided with in response to the size of LGP.

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 substrate.

Described reflective module is metal reflective plate or the other materials that is coated with reflecting surface.

Described reflective module inner surface is provided with reflector layer.

After adopting such scheme, the present invention 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, also effectively prevent light losing, to improve the light efficiency and the irradiation brightness in LED-backlit source in the effective coverage irradiation.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 local combination schematic diagram of the present invention;

Fig. 2 is a local combination vertical view of the present invention;

Fig. 3 is a combination cross-sectional schematic of the present invention;

Fig. 4 is the schematic perspective view of reflective module of the present invention;

Fig. 5 is the side view of reflective module of the present invention;

Fig. 6 is the vertical view of reflective module of the present invention;

Fig. 7 is the invention process schematic diagram.

The specific embodiment

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

This 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. 4,5,6,7, reflective module 3 is a rectangle block that forms in response to substrate 1 size, its upper end is uncovered 31, 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 in the upper end is curved respectively downwards 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.

This 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 31 orientations 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 ".

Claims

1, a kind of LED-backlit source structure comprises substrate and a plurality of led chip, and led chip is linear array on substrate; It is characterized in that: substrate is provided with at least one rectangular reflective module, and this reflective module is that cover places on the led chip, and each inner surface of reflective module is an arc-shaped concave, and the arc curvature of inner surface facing each other is different.

2, LED-backlit source structure as claimed in 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, LED-backlit source structure as claimed in 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, LED-backlit source structure as claimed in claim 3, it is characterized in that: the width of linear groove is greater than the led chip width.

5, as claim 1,2 or 3 described LED-backlit source structures, it is characterized in that: the lower surface of reflective module is provided with the protruding pin of a plurality of cooperations.

6, as claim 1,2 or 3 described LED-backlit source structures, it is characterized in that: reflective module is provided with a plurality of being arranged on the pcb board.

7, as claim 1,2 or 3 described LED-backlit source structures, it is characterized in that: reflective module is metal reflective plate or the other materials that is coated with reflecting surface.

8, as claim 1,2 or 3 described LED-backlit source structures, it is characterized in that: the reflective module inner surface is provided with reflector layer.