CN201779554U

CN201779554U - LED back light module

Info

Publication number: CN201779554U
Application number: CN2010202955940U
Authority: CN
Inventors: 姜洪波
Original assignee: Konka Group Co Ltd
Current assignee: Konka Group Co Ltd
Priority date: 2010-08-18
Filing date: 2010-08-18
Publication date: 2011-03-30
Anticipated expiration: 2020-08-18

Abstract

The utility model discloses an LED back light module, which comprises n light-emitting elements and a diffuser plate, wherein n refers to a natural number; each light-emitting element comprises a light-guiding plate and more than one LED lamp; the LED lamps are arranged at the two ends of the light-guiding plate; the light-emitting surfaces of the LED lamps face to the end surfaces of the light-guiding plates; bar-shaped light emitting surfaces are formed on the upper surfaces of the light-guiding plates; the bar-shaped light-emitting surfaces of the light-guiding plates are parallelly arranged in the same plane in an equidistant manner; the plane is parallel to the diffuser plate; screen dots are arranged on the lower surfaces of the light-guiding plates, and are used for destroying the perfect reflection of light emitted from the LED lamps in the light-guiding plates; and the light-guiding plate adopts a cuboid or a cylinder. A line light source comprises less LED lamps and a light-guiding plate, and then is converted into a surface light source by the diffuser plate, so that the number of the LED lamps in the LED back light module can be remarkably reduced, and the cost is saved, meanwhile, the thickness of the LED back light module is decreased.

Description

A kind of LED-backlit module

Technical field

The utility model belongs to technical field of liquid crystal display, relates in particular to a kind of LED-backlit module.

Background technology

Along with development of science and technology, lcd technology is more and more ripe, and TV is also from using traditional kinescope liquid crystal display till now.LCDs is passive luminous display screen.Liquid crystal itself is not luminous, so LCDs needs module backlight that light source is provided, divides from the classification of light source, can be divided into CCFL (cold-cathode fluorescence lamp) module backlight, LED (Light Emitting Diode, light emitting diode) module backlight etc.The LED-backlit module divides according to the LED position can be divided into direct-light type LED backlight module and LED side module backlight.But it is thin a lot of that the thickness of LED side module backlight can be done than straight-down negative, also can save partial L ED lamp simultaneously do not influence uniformity.In general in the LED side module backlight, LGP accounts for a very consequence.Because side core backlight is exactly to rely on LGP that the light of LED lamp is changed into area source from spot light.

Traditional direct-light type LED backlight module is directly the LED lamp to be arranged by the millet cake battle array, is converted into area source from spot light then, and its critical component is LED lamp, diffuser plate.The function of diffuser plate is directly the LED lamp to be converted into area source by spot light.The shortcoming that the direct-light type LED backlight module exists is the contradiction of LED lamp quantity and module thickness, and lamp quantity is many more, then can arrange De Gengmi, shortens light mixing distance, and module thickness is reduced.But can bring increasing of cost.

Traditional side LED-backlit module backlight is that the LED lamp is arranged by line lattice, then spot light is converted into area source, and its critical component is LED lamp, LGP.The function of LGP is that the LED lamp is converted into area source by spot light.Though side LED module backlight has reduced the consumption of LED lamp to a certain extent, still not best selection.The firefly phenomenon is difficult to solve, and has determined that LED lamp bank row still must be closeer.

The utility model content

The technical problems to be solved in the utility model is the defective that exists in the above-mentioned prior art, and a kind of lower-cost LED-backlit module is provided.

For solving the problems of the technologies described above, the utility model LED-backlit module comprises:

N luminous group and a diffuser plate, n is a natural number;

Described luminous group comprises a LGP and more than one LED lamp, described LED lamp places described LGP two ends, the exiting surface of described LED is over against the end face of described LGP, and there is the bar shaped exiting surface on the surface, top of described LGP, and this bar shaped exiting surface is over against described diffuser plate; The surface below of described LGP has the site, and this site is in order to destroy the total reflection of light in described LGP of sending from the LED lamp.

Further, the bar shaped exiting surface of described each LGP is positioned at same plane, and this plane parallel is in described diffuser plate.Described diffuser plate is diffused into whole plane with the light that described each bar line exiting surface sends, thereby forms area source.

Further, the bar shaped exiting surface of described each LGP is parallel and equidistant.

Further, the distance of described diffuser plate and described LGP is smaller or equal to 20mm.

Further, described LGP is a rectangular structure, and its upper surface is described exiting surface.

Further, described LGP is a cylinder.

Further, in described luminous group, comprise a LED lamp, described LED lamp is arranged at an end of described LGP.

Further, in described luminous group, comprise two LED lamps, described two LED lamps are arranged at the two ends of described LGP respectively.

Further, described LED-backlit module also comprises diffusion sheet and blast sheet above described diffuser plate.

Further, described LED-backlit module also comprises metal backing and support column, and described support column places between described diffuser plate and the described metal backing bottom surface, to support described diffuser plate.

The beneficial effects of the utility model are:

The utility model comprises n luminous group and diffuser plate that is equivalent to line source, and this diffuser plate is diffused into whole plane with this n luminous group of light that sends, thereby obtains area source.Form by a LGP and a more than one LED lamp for luminous group with bar shaped exiting surface, the LED lamp places the LGP two ends, the light that the LED lamp sends enters LGP generation total reflection, the site design is adopted in the below of LGP, in order to destroy total reflection, then light penetrates by the bar shaped exiting surface of LGP top, and this luminous group is equivalent to a bar shaped fluorescent tube.Diffuser plate places the top of LGP exiting surface.Adopt said structure, can produce a line source by the combination of one or two LED lamp and a LGP, therefore, the remarkable quantity of LED lamp in the LED-backlit module, the saving cost reduces the thickness of LED-backlit module simultaneously.

The utility model is simple in structure, is convenient to promote the use of.

Description of drawings

Fig. 1 is the utility model LED-backlit modular structure schematic diagram;

Fig. 2 is luminous group a vertical view;

Fig. 3 is luminous group a front view;

Fig. 4 is n luminous group an arrangement schematic diagram.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

The utility model key is to adopt the LGP with bar shaped exiting surface that the LED lamp source is converted into the proximal line light source from spot light, utilizes diffuser plate that line source is converted into area source then.Thereby on the thickness of the quantity of LED lamp and LED-backlit module, has advantage.

Fig. 1 is the utility model LED-backlit modular structure schematic diagram, and as shown in the figure, the utility model LED-backlit module comprises luminous group, diffuser plate, metal backing, support column, and other optics unit diaphragms such as diffusion sheet, blast sheet.

Luminous group is n, and n is a natural number.Luminous group comprises a LGP and more than one LED lamp, the LED lamp is arranged at the two ends of LGP, and the exiting surface of LED lamp is over against two end faces of LGP, for saving cost, the quantity of LED lamp is good with one or two, but the LED lamp should be selected high-powered LED lamp for use; The LGP top is the bar shaped exiting surface, and exiting surface is over against diffuser plate, and the site design is adopted in the below of LGP, to destroy the total reflection of light in this LGP of sending from the LED lamp, light is penetrated from the top exiting surface.The exiting surface of LGP is designed to bar shaped, and luminous like this group of light that produces is equivalent to the light that a bar shaped fluorescent tube produces, and this luminous group is similar to line source.

The concrete shape of LGP can be cylinder, or rectangular structure, is exiting surface with the upper surface.Luminous group structure such as Fig. 2, shown in Figure 3.

Fig. 4 is n luminous group an arrangement schematic diagram, as shown in the figure, the bar shaped exiting surface parallel equidistant of each LGP of luminous group is arranged in the same plane, diffuser plate is set in parallel in the top on this plane, side by support column and metal backing fixes, and allows each luminous group certain light mixing distance is arranged.The distance on diffuser plate and luminous group of plane is arranged at less than 20mm is advisable.

The utility model LED-backlit module is followed successively by emission sheet, LGP and LED lamp, diffuser plate from top to bottom, is other light diaphragms such as diffusion sheet, blast sheet above diffuser plate.

Dispose support column on the reflector plate, support column is fixed on the metal backing bottom surface, and the support by support column, allows maintain a certain distance between diffuser plate and the LGP, and this distance can guarantee that light mixes, and this distance is less than 20mm usually.

In the utility model, utilize high-powered LED lamp and combination, be modeled to fluorescent tube, light source is provided with LGP of bar shaped exiting surface.The LED lamp emits beam, and through LGP inside, in the inner generation of LGP total reflection, after the destruction total reflection of the site at LGP back, light penetrates from the top exiting surface of LGP.Thereby spot light is converted into approximate line source equably.

The utility model can be selected the high-powered LED lamp of less number for use, realizes the LED-backlit module, compares the LGP that side LED module backlight uses monoblock simultaneously, can reduce cost and complete machine weight.Thereby on cost and thickness, all has bigger advantage.

Above-described specific embodiment, the purpose of this utility model, technical scheme and beneficial effect are further described, institute it should be noted, the above only is a specific embodiment of the utility model, and those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the technical scheme of the utility model claim record and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.

Claims

1. LED-backlit module is characterized in that comprising:

N luminous group and a diffuser plate, n is a natural number;

Described luminous group comprises a LGP and more than one LED lamp, and described LED lamp places described LGP two ends, and the exiting surface of described LED is over against the end face of described LGP;

There is the bar shaped exiting surface on the surface, top of described LGP, and this bar shaped exiting surface is over against described diffuser plate; The surface below of described LGP has the site, and this site is in order to destroy the total reflection of light in described LGP of sending from the LED lamp.

2. LED-backlit module according to claim 1 is characterized in that:

The bar shaped exiting surface of described each LGP is positioned at same plane, and this plane parallel is in described diffuser plate.

3. LED-backlit module according to claim 2 is characterized in that:

Parallel and the equidistant setting of the bar shaped exiting surface of described each LGP.

4. according to claim 1 or 2 or 3 described LED-backlit modules, it is characterized in that:

The distance of described diffuser plate and described LGP is smaller or equal to 20mm.

5. according to claim 1 or 2 or 3 described LED-backlit modules, it is characterized in that:

Described LGP is a cuboid, and its upper surface is described exiting surface.

6. according to claim 1 or 2 or 3 described LED-backlit modules, it is characterized in that:

Described LGP is a cylinder.

7. according to claim 1 or 2 or 3 described LED-backlit modules, it is characterized in that:

In described luminous group, comprise a LED lamp, described LED lamp is arranged at an end of described LGP.

8. according to claim 1 or 2 or 3 described LED-backlit modules, it is characterized in that:

In described luminous group, comprise two LED lamps, described two LED lamps are arranged at the two ends of described LGP respectively.

9. according to claim 1 or 2 or 3 described LED-backlit modules, it is characterized in that:

Described LED-backlit module also comprises diffusion sheet and blast sheet above described diffuser plate.

10. according to claim 1 or 2 or 3 described LED-backlit modules, it is characterized in that:

Described LED-backlit module also comprises metal backing and support column, and described support column places between the bottom surface of described diffuser plate and described metal backing, to support described diffuser plate.