CN202158437U

CN202158437U - Backlight source module with composite light-emitting sources

Info

Publication number: CN202158437U
Application number: CN2011202200201U
Authority: CN
Inventors: 苏世虎
Original assignee: Nanjing CEC Panda LCD Technology Co Ltd
Current assignee: Nanjing CEC Panda LCD Technology Co Ltd
Priority date: 2011-06-27
Filing date: 2011-06-27
Publication date: 2012-03-07
Anticipated expiration: 2021-06-27

Abstract

The utility model discloses a backlight source module with composite light-emitting sources. The backlight source module with the composite light-emitting sources comprises at least one CCFL (Cold Cathode Fluorescent Lamp) light-emitting source, at least one LED (Light-Emitting Diode) light-emitting source, a supporting piece, a reflector, a frame, a diffusing plate, an optical film group and a back plate, wherein the supporting piece supports the diffusing plate arranged on the supporting piece and fixes the CCFL light-emitting source; the light-emergent face of the LED light-emitting source is arranged between the back plate and the reflecting face of the reflector; the light-emergent face of the CCFL light-emitting source is arranged between the reflecting face of the reflector and the light-incident face of the diffusing plate; the optical film group is arranged above the diffusing plate; and the frame and the back plate contain the optical film group, the diffusing plate, the LED light-emitting source, the CCFL light-emitting source, the supporting piece and the reflector. The backlight source module with the composite light-emitting sources realizes the use of a liquid crystal display device under a wider temperature environment and is more energy-saving.

Description

Recombination luminescence source backlight source module

Technical field

The utility model belongs to technical field of liquid crystal display, specifically is a kind of recombination luminescence source backlight source module.

Background technology

Liquid crystal indicator has light weight, thin thickness, end power consumption and the little characteristics of radiation, has been widely used in fields such as information technology, multimedia technology, has become the main flow of various display unit.Because liquid crystal panel itself is not luminous, needing backlight source module is that it provides light source.In middle large scale liquid crystal display unit, particularly in the large scale, in order to satisfy the high brightness requirement; Normally adopt the down straight aphototropism mode set liquid crystal indicator, in liquid crystal indicator, light emitting source mainly adopts LED (Light Emitting Diode; Light emitting diode) or CCFL (Cold Cathode Fluorescent Lamp; The cold cathode fluorescent lamp pipe), in a liquid crystal indicator, uses a kind of light emitting source usually, a plurality of light sources are pressed certain regular arrangement.Along with large-sized liquid crystal indicator obtains increasing use in different field; Objective condition because of actual environment for use; Particularly temperature in four seasons changes area greatly; Because the restriction of single light emitting source self operating characteristic, make the liquid crystal indicator of single light emitting source receive the restriction of certain objective condition in these regional application.

Fig. 1 is a kind of prior art straight-down negative CCFL backlight source module liquid crystal indicator structural representation.This device comprises a framework 30, a liquid crystal display 100, an optical diaphragm group 50, a diffuser plate 40, glue circle frame 70, light source 10, a reflection unit 20, supports the support member 60 and a backboard 80 of diffuser plate 40 and fixed light source 10.This framework 30 is accommodated liquid crystal display 100, optical diaphragm group 50, diffuser plate 40, light source 10 with backboard 80, is supported the support member 60 and the reflection unit 20 of diffuser plate 40 and fixed light source 10.Fig. 2 is the vertical view of Fig. 1, among the figure, for the sake of clarity, diffuser plate 40, optical diaphragm group 50 and liquid crystal display 100 is launched to draw successively.

Fig. 3 is a kind of prior art direct LED backlight module liquid crystal indicator structural representation.This device comprises a framework 130, a liquid crystal display 200, an optical diaphragm group 150, a diffuser plate 140, glue circle frame 170, light source 110, a reflection unit 120, supports the support member 160 and a backboard 180 of diffuser plate 140 and fixed light source 110.This framework 130 is accommodated liquid crystal display 200, optical diaphragm group 150, diffuser plate 140, light source 110 with backboard 180, is supported the support member 160 and the reflection unit 120 of diffuser plate 140 and fixed light source 110.Fig. 4 is the vertical view of Fig. 3, among the figure, for the sake of clarity, diffuser plate 140, optical diaphragm group 150 and liquid crystal display 200 is launched to draw successively.

In existing straight-down negative LED and the CCFL backlight, because of the light emitting source self characteristics, led light source is worked preferable under cryogenic conditions, and under the higher temperature environment, the luminous efficiency of LED descends, and reduce service life; CCFL under cryogenic conditions particularly subzero be difficult to start, and luminous efficiency descends, and is adapted at working under the higher temperature conditions.The liquid crystal indicator of existing single LED or CCFL light emitting source can not change regional instructions for use greatly by satisfied temperature.CCFL becomes to be arranged in parallel in the existing straight-down negative CCFL backlight source module, and CCFL works under the electrical specification of setting, and keeps stable, and the brightness of backlight is fixed, and can not satisfy backlight region luminance dynamic control requirement.Therefore, it is more to consume energy during work, does not meet energy-conservation, low-carbon (LC) requirement.

The utility model content

The utility model purpose: to the problem and shortage of above-mentioned existing existence, the purpose of the utility model provides a kind of recombination luminescence source backlight source module, solves existing single light emitting source direct-light-type backlight module and can not satisfy the big problem of variation of ambient temperature.

Technical scheme: for realizing above-mentioned utility model purpose; The technical scheme that the utility model adopts is a kind of recombination luminescence source backlight source module; Comprise at least one CCFL light emitting source, at least one LED light emitting source, a support member, a reflection unit, a framework, a diffuser plate, optical diaphragm group and a backboard; Diffuser plate that said supports support is provided thereon and fixation of C CFL light emitting source; The exiting surface of LED light emitting source is arranged between the reflecting surface of said backboard and said reflection unit; The exiting surface of CCFL light emitting source is arranged between the incidence surface of reflecting surface and said diffuser plate of said reflection unit, and said optical diaphragm group is located at the top of diffuser plate, and said framework and backboard are accommodated optical diaphragm group, diffuser plate, LED light emitting source, CCFL light emitting source, support member and reflection unit.

The profile of said CCFL light emitting source can be annular, rectangle, triangle, square waveform, zig-zag, polygon and other varistructure profiles etc.; Its quantity can have a plurality of; In backlight source module, can become the regular arrangement of multiple lines and multiple rows, also other forms of rule or non-regular arrangement.Said CCFL light emitting source can be common colourity territory CCFL or high chroma territory CCFL etc.

Said LED light emitting source can be a white light LEDs, green light LED, and red-light LED, blue-ray LED, infrared light LED, ultraviolet leds and other colors LED, or a LED luminescence unit is by wherein two or more constitutes.Said LED light emitting source can have a plurality of, can become the regular arrangement of ranks, also the arrangement of other shapes.

This backlight source module can be that constant brightness control drives, and also regional luminance is dynamically controlled driving; Can the automatic light source drive system, also automatic light source drive system not; According to the actual working environment temperature regime that temperature-sensing element (device) detects, when environment temperature was low, the LED light emitting source was worked, when environment temperature is higher, and the work of CCFL light emitting source, also two kinds of light emitting sources are worked simultaneously.This backlight source module is not limited only to the backlight for liquid crystal display source, comprises adopting other application as light source of this backlight source module.

Beneficial effect: the utility model adopts the backlight source module in recombination luminescence source, is a preferred technique scheme that solves liquid crystal indicator ability normal use under the bigger environment of variations in temperature.In large scale; Particularly in the large scale product of high brightness; LED and CCFL are as liquid crystal indicator source backlight, and arrangement is LED and a CCFL light source of arranging some in the bottom of Liquid Crystal Module back light unit, become straight-down negative to distribute; Realize that liquid crystal indicator uses under the temperature environment of broad; And this recombination luminescence source module backlight can realize that the regional luminance of straight-down negative CCFL backlight source module liquid crystal indicator dynamically controls, and solves to be not suitable for regional luminance dynamically control and the too high problem of energy consumption in the existing straight-down negative CCFL backlight technology, makes CCFL backlight source module liquid crystal indicator more energy-conservation.

Description of drawings

Fig. 1 is a prior art straight-down negative CCFL backlight source module liquid crystal indicator structural representation;

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

Fig. 3 is a prior art direct LED backlight module liquid crystal indicator structural representation;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is recombination luminescence source backlight source module embodiment 1 structural representation;

Fig. 6 is the vertical view of Fig. 5;

Fig. 7 is recombination luminescence source backlight source module embodiment 2 vertical views.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the utility model; Should understand these embodiment only be used to the utility model is described and be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.

Embodiment 1:

Like Fig. 5 and shown in Figure 6; Recombination luminescence source backlight source module comprises LED light emitting source 220, first support member 230, second support member 231, a reflection unit 240, a framework 250, a diffuser plate 260, an optical diaphragm group 270 and a backboard 280 of at least the one CCFL light emitting source 210, the 2nd CCFL light emitting source 211, the 3rd CCFL light emitting source 212, the 4th CCFL light emitting source 213, some one-tenth ranks regular arrangement; Wherein first support member 230 supports a diffuser plate 260 and a fixing CCFL light source 210 and the 2nd CCFL light source 211, the second support members 231 and supports diffuser plate 260 and fixing the 3rd CCFL light source 212 and the 4th CCFL light source 213.The exiting surface of LED light emitting source 220 is arranged between the reflecting surface of backboard 280 and reflection unit 240; The exiting surface of the one CCFL light emitting source 210, the 2nd CCFL light emitting source 211, the 3rd CCFL light emitting source 212 and the 4th CCFL light emitting source 213 is arranged between the incidence surface of reflecting surface and diffuser plate 260 of reflection unit 240; Optical diaphragm group 270 is located at the top of diffuser plate 260, and framework 250 and backboard 280 are accommodated optical diaphragm group 270, diffuser plate 260, a CCFL light emitting source 210, the 2nd CCFL light emitting source 211, the 3rd CCFL light emitting source 212, the 4th CCFL light emitting source 213, LED light emitting source 220, first support member 230, second support member 231 and reflection unit 240.In the present embodiment, as shown in Figure 6, a CCFL light emitting source 210, the 2nd CCFL light emitting source 211, the 3rd CCFL light emitting source 212 and the 4th CCFL light emitting source 213 be shaped as " recessed " shape.

Embodiment 2:

As shown in Figure 7, other part of present embodiment is identical with embodiment 1, the 5th CCFL light emitting source 214, the 6th CCFL light emitting source 215, the 7th CCFL light emitting source 216 and the 8th CCFL light emitting source 217 be shaped as " 9 " shape.

Claims

1. recombination luminescence source backlight source module; Comprise at least one CCFL light emitting source (210), at least one LED light emitting source (220), a support member (230), a reflection unit (240), a framework (250), a diffuser plate (260), optical diaphragm group (270) and a backboard (280); Said support member (230) supports diffuser plate (260) and fixation of C CFL light emitting source (210) provided thereon; The exiting surface of LED light emitting source (220) is arranged between the reflecting surface of said backboard (280) and said reflection unit (240); The exiting surface of CCFL light emitting source (210) is arranged between the incidence surface of reflecting surface and said diffuser plate (260) of said reflection unit (240); Said optical diaphragm group (270) is located at the top of diffuser plate (260), and said framework (250) and backboard (280) are accommodated optical diaphragm group (270), diffuser plate (260), LED light emitting source (220), CCFL light emitting source (210), support member (230) and reflection unit (240).

2. according to the said recombination luminescence of claim 1 source backlight source module, it is characterized in that: the profile of said CCFL light emitting source (210) is annular, rectangle, triangle, square waveform, zig-zag or polygon.

3. according to claim 1 or 2 said recombination luminescence source backlight source module, it is characterized in that: said CCFL light emitting source (210) has a plurality of.

4. according to the said recombination luminescence of claim 1 source backlight source module, it is characterized in that: said LED light emitting source (220) has a plurality of.