CN201133587Y

CN201133587Y - Backlight module

Info

Publication number: CN201133587Y
Application number: CNU2007203095865U
Authority: CN
Inventors: 杨皆得
Original assignee: WORLD WALK CO Ltd
Current assignee: WORLD WALK CO Ltd
Priority date: 2007-12-29
Filing date: 2007-12-29
Publication date: 2008-10-15
Anticipated expiration: 2017-12-29

Abstract

The utility model relates to a backlight module. An LED light is arranged in the center of the surface of a driving plate, and threads through a guide plate and inside the round orifice of a reflecting film so that the light can be given and shine outwards from the center, thus uniformly improving the whole brightness of the light besides enlarging the irradiated area. A reflecting tape is stuck to the surface of the circumference of the module so that diverged light is gathered again, thus eliminating the problem that the brightness of the fringe of the module is nonuniform. In addition, the whole LED light adopts first connection in series and subsequent connection in parallel so that when one LED light is damaged, the other LED lights give light outwards, thus improving the reliability of the whole module. No light shield is needed so that the thickness of the whole module becomes smaller and the module becomes more portable. The structure of the utility model is designed to be simple and reliable, and the parts of the module are connected compactly, thus not only reducing the height of the whole height and improving the service life, but also further reducing the manufacturing cost.

Description

Backlight module

Technical field

The utility model relates to a kind of lighting unit, especially a kind of backlight module.

Background technology

Backlight module is a kind of assembly that light source is provided for the product back side, be widely used at present in the consumer products such as various information, communication, products such as LCD, scanner, slide projector, projecting apparatus, mobile phone faceplate for example, wherein being the biggest market as the backlight liquid crystal display parts, the function of backlight module provides the light source that brightness is abundant and be evenly distributed, and makes normally show image of panel.Because the backlight module technical development is rapid, thereby become one of product that gets most of the attention in the electronic component industry.Along with the development and the lifting of electrical application technology, backlight module keeps the competitiveness in market in order to be suitable for the demand in market, also develops to lightness, ultrathin type, low consumption, high brightness and the direction that reduces cost thereupon.Backlight module generally comprises light source, LGP and reflective membrane miscellaneous, wherein, reflective membrane can improve the brightness of backlight module integral body, makes light source when not consuming additional energy source, can also obtain the performance of maximal efficiency, therefore become one of strength member in the backlight module.

Existing backlight module can be divided into " straight-down negative " and " side-light type " two kinds of designs.The backlight design of straight-down negative is arranged at light source under the module, because need bigger placement space, so be applicable to portability and the less demanding monitor or television of spatiality etc.The backlight module of side-light type design then is that the side in module is provided with light source, adopts the design of light source by the side irradiation of module, has light and characteristics such as low consumption electric weight, is applied to the light source of notebook usually.

The backlight module of two kinds of different designs modes all is that the fluorescent tube with variety classes and shape is an illuminator, employing is from the side of inside modules or the mode of lateral internal illumination, thereby cause the non-uniform light of backlight module, overall brightness promotes not enough, also causes the back of the body piece darker problem of brighter another side on one side easily.Again because the inside of existing backlight module only is provided with an illuminator, if this illuminator because of damage stop luminous, to such an extent as to backlight module integral body all can lose illumination effect.Also because the inner body of backlight module is more, the connection between each part is comparatively complicated again, therefore is not easy to the maintenance and the replacing in later stage.

The utility model content

The utility model can't be by the luminous laterally problem of module centers at the illuminator of existing backlight module, provides a kind of illuminator can be by the luminous laterally backlight module of module centers.

For achieving the above object, the utility model provides a kind of backlight module, comprise reflective membrane, LGP and illuminator and voltage-stablizer, described LGP is arranged at the surface of described reflective membrane, the outside of periphery also is provided with the reflective tape of bar shaped, also comprises drive plate, and described illuminator is arranged at the surface of described drive plate, the center of described reflective membrane and described LGP is respectively equipped with circular hole, and described illuminator is arranged in the inside of described circular hole.

Described illuminator is the LED lamp.

Described LED lamp adopts series connection back connected mode in parallel earlier.

Described LED lamp inside also is provided with diode.

Described voltage-stablizer is arranged at the bottom of described drive plate, and is connected with described LED lamp.

Described drive plate is arranged at the bottom of described reflective membrane.

Compared with prior art, the utlity model has following advantage:

The backlight module that the utility model provides, the LED lamp is arranged at the centre of surface of drive plate, and be arranged in the circular hole inside of LGP and reflective membrane, make the LED lamp can send 360 ° light laterally by the center, when enlarging the light irradiated area, the brightness that has also improved light integral body uniformly.Reflective tape is sticked in the surface of module circumference, make the light after dispersing agglomerated together again, avoided the module edge brightness irregularities to be easy to generate the problem of bright spot.In addition, adopt series connection back connected mode in parallel earlier with the LED lamp is whole, to such an extent as to when a LED lamp is damaged, the light that remaining LED lamp still can send in the outside of mind-set module from module, thus the unfailing performance of module whole improved.Because the project organization that the backlight module that the utility model provides adopts light directly to throw laterally, therefore the LED of pointer leaded light just need not to use simultaneously light shield that it is blocked, reduce the height of backlight module integral body virtually, also and then saved manufacturing cost.The backlight module that the utility model provides combines the LED of two kinds of different kenels, has broken through traditional light-emitting mode, makes light-emitting area more even and more ultra-thin.The utility model global design is simple and reasonable, connects compactness between each parts, adopts modularization to design production because of it is whole, has not only improved whole service life, has also reduced manufacturing cost, has also further improved production efficiency of products.

Description of drawings

Fig. 1 decomposes each modular construction schematic diagram of back for the utility model;

Fig. 2 is the utility model plan structure schematic diagram;

Fig. 3 is the utility model cross-sectional view.

The main element symbol description is as follows:

1 reflective tape, 2 LGPs

3 reflective membrane 4LED lamps

5 drive plates, 6 voltage-stablizers

The specific embodiment

Fig. 1 comprises reflective tape 1, LGP 2, reflective membrane 3, LED lamp 4 and drive plate 5 for the utility model decomposes each modular construction schematic diagram of back.LGP 2, reflective membrane 3 and drive plate 5 integral body are circular design, and LGP 2, reflective membrane 3 and drive plate 5 matching design are the size of same diameter size.It is preferable designing material that illuminator adopts the LED lamp, this LED lamp 4 is arranged at the surperficial home position of drive plate 5, LGP 2 is set in turn in the surface of reflective membrane 3 and drive plate 5, the home position of LGP 2 and reflective membrane 3 is provided with the circular hole of same diameter, and LED lamp 4 is arranged at the circular hole inside of LGP 2 and reflective membrane 3.With after LGP 2, reflective membrane 3 and drive plate 5 combinations, also be provided with the reflective tape 1 of a strip on the surface of this circumference successively, this reflective tape 1 sticks the circumferential surface in module.

The quantity of LED lamp 4 is preferable design quantity with four, and two groups of LED lamps are provided with in relative mode respectively.Therefore, after the module energising, two groups of LED lamps can be sent 360 ° light laterally by the center, and these light direct irradiations enter the inside of LGP 2, thereby linear light sources is atomized into uniform face type light source, and then have enlarged the irradiated area of light.Because LGP 2 is arranged at the top of reflective membrane 3, make light form diffuse reflection and diffusion uniformly.Again because the surface of module periphery also is provided with the reflective tape 1 of a strip, the edge that reflective tape 1 not only can stop light to see through LGP penetrates to module-external, and then caused the waste of light source, can also the light after dispersing is agglomerated together again, avoided the module edge brightness irregularities to be easy to generate the problem of bright spot, thereby increased the briliancy of light integral body, the brightness that has also improved light.

Fig. 2 and Fig. 3 are respectively of the present utility model and overlook and cross-sectional view.As shown in the figure, LED lamp 4 is arranged at the inside, the center of circle of the utility model backlight module, the quantity of LED lamp 4 is preferable design quantity with four, and two groups of LED lamps are provided with in relative mode respectively, the whole series connection back connected mode in parallel earlier that adopts of LED lamp avoids one of them LED lamp just to cause the phenomenon of blank screen to take place after being damaged.Voltage-stablizer 6 is arranged at the bottom of drive plate 5, and is connected with LED lamp 4.Voltage-stablizer 6 adopts the good material of voltage regulation result to make, and has therefore improved the stability of line voltage distribution, has effectively protected the LED lamp, has also increased the service life of LED lamp.

The employed power supply of the utility model LED lamp, by transformer alternating current being changed into direct current (AC/DC) can use, and does not need therefore also to have saved manufacturing cost at the transformer that direct current commentaries on classics alternating current is set in addition; Simultaneously, among two groups of LED lamps if there is a LED lamp to be damaged, other LED lamp still can send omnibearing light, therefore when a LED lamp damages, remaining LED lamp still can send in the outside of mind-set module from module light, and remaining LED light that lamp sends still can be contained wider range of exposures.

In sum, the backlight module that the utility model provides can make the light that is sent by light source when enlarging irradiated area, also improved the brightness of light integral body uniformly, it is bad and can't be by module centers to defectives such as the module outside are luminous to have improved the light source irradiating angle.The integral body of module can effectively be dispelled the heat, and the heat of having avoided producing because of light source is difficult for outwards distributing, and the module whole service life of causing and the reduction of service efficiency.Because it is lower to the space requirement of placing, can reach design ultrathin and lightness, adopt modularization integral body to produce, not only reduced manufacturing cost, further improved production efficiency of products, can also change the size of module whole according to demand, avoid developing the cost of large mold, also improve the qualification rate of product.

More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection domain of the present utility model.

Claims

1, a kind of backlight module, comprise reflective membrane, LGP and illuminator and voltage-stablizer, described LGP is arranged at the surface of described reflective membrane, the outside of periphery also is provided with the reflective tape of bar shaped, it is characterized in that also comprise drive plate, described illuminator is arranged at the surface of described drive plate, the center of described reflective membrane and described LGP is respectively equipped with circular hole, and described illuminator is arranged in the inside of described circular hole.

2, a kind of backlight module as claimed in claim 1 is characterized in that, described illuminator is the LED lamp.

3, a kind of backlight module as claimed in claim 2 is characterized in that, described LED lamp adopts series connection back connected mode in parallel earlier.

4, a kind of backlight module as claimed in claim 2 is characterized in that, described LED lamp inside also is provided with diode.

5, as claim 1 and 2 described a kind of backlight modules, it is characterized in that described voltage-stablizer is arranged at the bottom of described drive plate, and be connected with described LED lamp.

6, a kind of backlight module as claimed in claim 1 is characterized in that, described drive plate is arranged at the bottom of described reflective membrane.