CN201599650U

CN201599650U - Backlight module

Info

Publication number: CN201599650U
Application number: CN200920261861XU
Authority: CN
Inventors: 姜洪波
Original assignee: Konka Group Co Ltd
Current assignee: Konka Group Co Ltd
Priority date: 2009-12-22
Filing date: 2009-12-22
Publication date: 2010-10-06
Anticipated expiration: 2019-12-22

Abstract

The utility model discloses a backlight module, which comprises a frame body, a reflective sheet, a lamp tube and a diffusing device. The frame body is formed by surrounding an outer frame and a metal back plate. The reflective sheet is located on one side of the metal back plate and is fixedly connected with the frame body. The diffusing device is located on one side of the metal back plate and is fixedly connected with the frame body. The lamp tube is arranged between the reflective sheet and the diffusing device; the diffusing device comprises a diffusing base plate and a light guide plate, and the light guide plate is attached to the surface of the diffusing base plate. For the backlight module, the mist degree of the diffusing base plate is increased, the light transmittance is increased, and the backlight effect of the backlight module is further increased.

Description

A kind of module backlight

Technical field

The utility model relates to photoelectric field, relates in particular to a kind of module backlight.

Background technology

Along with development of science and technology, liquid crystal technology is more and more ripe, and TV is also from using traditional kinescope imaging to develop into present LCDs.LCDs is passive luminous display screen, and its liquid crystal itself is not luminous, needs module backlight that light source is provided.

Module backlight generally is divided into the side module backlight and end module backlight according to the position of light source.Side liquid crystal module backlight is used in the LCDs of small-medium size usually, and liquid crystal module backlight then is applied in large-sized LCDs at the end.Side liquid crystal module backlight is because light source in the side, makes its thinner thickness.And end liquid crystal module backlight since light source in the bottom, so thickness is thicker.In general, module backlight all needs the disguise that reaches certain, and an one important symbol is exactly the outside from liquid crystal display, whether can see lamp shadow, and usually, fluorescent tube is far away more apart from diffuser plate, and disguise is good more, and fluorescent tube is near more apart from diffuser plate, and disguise is poor more.In order to realize better disguise, can select the bigger diffuser plate of mist degree usually for use, but the permeability of the big diffuser plate of mist degree can be poor, so the light utilization efficiency of light source also can be lower.

Designed a kind of module backlight in the prior art, position at the corresponding fluorescent tube of a side of diffuser plate is provided with astigmatic device, the astigmatism device can carry out astigmatism to the light that fluorescent tube sends, but this module backlight also has certain defective, because astigmatic device and diffuser plate are the split designs, the astigmatism device needs the position of fixedly adjusting between astigmatic device and diffuser plate of extra parts (as support) to concern, this has increased the distance between astigmatic device and diffuser plate virtually, the thickness of module backlight is increased, also can affect simultaneously optical effect.

LCD TV develops towards the direction of slimming, the thickness of liquid crystal module is one of key factor of decision LCD TV thickness, and the thickness of module backlight has determined the thickness of liquid crystal module to a certain extent, and the improvement of back light module unit structure has great significance to the slimming of large scale liquid crystal TV.

The utility model content

The utility model embodiment technical problem to be solved is, a kind of module backlight is provided, and has increased the mist degree of diffusion substrate, has improved the transmitance of light, has further improved the optical effect of disperser.

In order to solve the problems of the technologies described above, the utility model embodiment provides a kind of module backlight, comprise framework, reflector plate, fluorescent tube and disperser, described framework is formed by housing and metal backing mutually enclose, the side that described reflector plate is positioned at described metal backing is fixedly connected on the described framework, the side that described disperser is positioned at described reflector plate is fixedly connected on the described framework, described fluorescent tube is arranged between described reflector plate and the described disperser, described disperser comprises: diffusion substrate and LGP, and on the surface of described LGP attached to described diffusion substrate.

Preferably, described diffusion substrate and described LGP are formed in one.

Preferably, described LGP is the column that the cross section has the cambered surface that seamlessly transits.

Preferably, the thickness of the center line axial location of the corresponding described fluorescent tube of the central axis of described LGP is less than the thickness of its both sides.

Preferably, a side of described diffusion substrate attaches blooming.

Implement the module backlight of the utility model embodiment, the LGP that disperser has can play the effect of dispersing to the light that fluorescent tube sends, the light that fluorescent tube can be sent is distributed to other zones, has increased the mist degree of diffusion substrate, has improved the transmitance of light; Simultaneously,, do not need extra parts,, further improved the optical effect of disperser as by the support lightguide plate fixing because diffusion substrate and LGP are one-body molded.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the structural representation of the disperser of the utility model embodiment module backlight;

Fig. 2 is the assembly structure schematic diagram of the utility model embodiment module backlight.

The specific embodiment

For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.

In conjunction with referring to Fig. 3, shown in Figure 4, the module backlight of the utility model embodiment comprises framework 1, reflector plate 3, fluorescent tube 5 and disperser 7, described framework 1 is formed by housing 12 and metal backing 14 mutually encloses, the side that described reflector plate 3 is positioned at described metal backing 14 is fixedly connected on the described framework 1, the side that described disperser 7 is positioned at described reflector plate 3 is fixedly connected on the described framework 1, and described fluorescent tube 5 is fixedly installed between described reflector plate 3 and the described disperser 7.

Framework 1 is the support frame of module backlight, housing 12 be fixedly mounted on respectively metal backing 14 two ends and with metal backing 14 vertical settings, reflector plate 3 is fixedly connected on respectively on the framework 1 with disperser 5 relative ends.

The side that reflector plate 3 is arranged on metal backing 14 is fixedly connected on the framework 1, and reflector plate 3 is made by the preferable reflectorized material of reflective function.

Fluorescent tube 5 is fixedly installed between described reflector plate 3 and the described disperser 7, and in the present embodiment, what fluorescent tube 5 used is cold cathode fluorescent lamp pipe (CCFL) or outer electrode fluorescent lamp (EEFL).

The side that disperser 7 is positioned at described reflector plate 3 is fixedly connected on the described framework 1, and it comprises: diffusion substrate 72 and attached to described diffusion substrate 72 lip-deep some LGPs 74.

Diffusion substrate 72 is to be made by the bigger material of mist degree, be tabular and have certain thickness, itself and reflector plate 3 be keeping parallelism and being oppositely arranged roughly, fluorescent tube 5 is arranged between diffusion substrate 72 and the reflector plate 3, and LGP 74 is arranged on described diffusion substrate 72 to have on the position of described fluorescent tube 5 towards the surperficial correspondence of reflector plate 3 one sides.

LGP 74 is columns that the thickness rule changes, and its cross section is arcuation, has a cambered surface that seamlessly transits 741, and the thickness of the position of bobbin thread is less than the thickness of its both sides in the corresponding fluorescent tube 5 of LGP 74 central axis.

Preferably, diffusion substrate 72 is integrated with LGP 74.

The module backlight of the utility model embodiment in the specific implementation, the light that fluorescent tube 5 sends, in the process LGP 74 of disperser 7, because the thickness of the position of bobbin thread is less than the thickness of its both sides in the corresponding fluorescent tube 5 of LGP 74 central axis, the light that 74 pairs of fluorescent tubes 5 of LGP send can play the effect of dispersing, LGP 74 can be distributed to the part light of corresponding fluorescent tube 5 positions other directions of its both sides, pass disperser 7 from the another side of diffusion substrate 72 with other angles at last, in this process, the light that 3 pairs of fluorescent tubes 5 of reflector plate send can play the effect of reflection; Module backlight can not influence the transmitance of light when increasing diffusion substrate 72 mist degrees.

In other embodiments of the module backlight of the utility model embodiment, the concrete shape of LGP 74 does not limit, it can be the column that the cross section has certain radian and seamlessly transits, it also can be the column that the cross section is linear transitions, also can be other shapes that the thickness rule changes, as long as satisfy the thickness of the thickness of the position of bobbin thread in the corresponding fluorescent tube 5 of LGP 74 central axis less than its both sides; The position of reflector plate 3, fluorescent tube 5 and disperser 7 is not changeless, in the practical operation, can be according to the thickness demand of module backlight, and the distance that reduction reflector plate 3, fluorescent tube 5 and disperser are 7 is to reach the effect of ultra-thin module backlight; One side of disperser 7 diffusion substrates 72 can also be provided with blooming 9, and blooming 9 can attach multilayer according to actual needs, as have the relative opposite side surface of the LGP 74 1 sides single or multiple lift blooming 9 that is sticked at diffusion substrate 72.

The module backlight of the utility model embodiment, the LGP that disperser has can play the effect of dispersing to the light that fluorescent tube sends, and the light that fluorescent tube can be sent is distributed to other zones, has increased the mist degree of diffusion substrate, has improved the transmitance of light; Simultaneously,, do not need extra parts,, further improved the optical effect of disperser as by the support lightguide plate fixing because diffusion substrate and LGP are one-body molded.

Above disclosed only is a kind of preferred embodiment of the utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.

Claims

1. module backlight, comprise framework, reflector plate, fluorescent tube and disperser, described framework is formed by housing and metal backing mutually enclose, the side that described reflector plate is positioned at described metal backing is fixedly connected on the described framework, the side that described disperser is positioned at described reflector plate is fixedly connected on the described framework, described fluorescent tube is arranged between described reflector plate and the described disperser, it is characterized in that: described disperser comprises: diffusion substrate and LGP, and on the surface of described LGP attached to described diffusion substrate.

2. module backlight as claimed in claim 1 is characterized in that: described diffusion substrate and described LGP are formed in one.

3. module backlight as claimed in claim 1 is characterized in that: described LGP is the column that the cross section has the cambered surface that seamlessly transits.

4. module backlight as claimed in claim 3 is characterized in that: the thickness of the center line axial location of the corresponding described fluorescent tube of the central axis of described LGP is less than the thickness of its both sides.

5. module backlight as claimed in claim 1 is characterized in that: a side of described diffusion substrate attaches blooming.