CN201354985Y

CN201354985Y - Side lighting type backlight module group

Info

Publication number: CN201354985Y
Application number: CNU2009200679695U
Authority: CN
Inventors: 蔡文彬; 何永新
Original assignee: SVA Group Co Ltd
Current assignee: Nanjing CEC Panda LCD Technology Co Ltd
Priority date: 2009-02-23
Filing date: 2009-02-23
Publication date: 2009-12-02
Anticipated expiration: 2019-02-23

Abstract

The utility model discloses a side lighting type backlight module group which comprises a tube group, a back board and a rubber frame, wherein the tube group consists of a tube, a tube reflector and a tube sleeve, the tube sleeve wraps electrode parts of the low-voltage end and the high-voltage end of the tube, and is used for protecting the tube, the back board is arranged under the tube group, supports and fixes the tube group, the rubber frame coats the tube group, the rubber frame is provided with an opening on the tube sleeve on the low-voltage end of the tube, and the opening is provided with a filter screen. The side lighting type backlight module group of the utility model can effectively improve heat radiation on the low-voltage end of the tube of the backlight module group.

Description

Side-light type module backlight

Technical field

The utility model relates to a kind of module backlight, particularly relates to a kind of side-light type module backlight.

Background technology

At present, LCD has been the main flow in FPD field.Module backlight is one of key part and component of LCD, because LCDs self is not luminous, the function of module backlight just provides enough brightness and the light source that is evenly distributed, and makes its normally show image.Module backlight can be divided into straight-down negative and two types of side-light type, the light source of down straight aphototropism mode set directly is placed on the below of liquid crystal panel, be transmitted directly to liquid crystal panel behind the relevant blooming piece of light process that light source sends, be mainly used in large scale liquid crystal displays such as TV; The light source of side-light type module backlight is placed on the side of LGP (LGP), and the light that light source sends is transmitted into liquid crystal panel through relevant blooming piece again through after the adjustment of LGP.The light source that module backlight uses mainly contains LED, CCFL (CCFL) or HCFL (HCFL) etc., but volume production mainly still adopts CCFL (CCFL) in using at present.CCFL (CCFL) is to enclose inert gas Ne+Ar mist in glass tube, wherein contain micro-mercury vapour (number mg), and in glass inwall coating fluorophor, in between the electrode at glass tube two, add the high voltagehigh frequency electric field, mercury vapour is excited to produce in this electric field and releases the energy luminescent effect, the ultraviolet of emit wavelength 253.7nm, the fluorophor atom of inwall radiates visible light (this visible wavelength is by the decision of fluorophor substance characteristics) then because of ultraviolet ray excited its energy level that promotes when atom returns low-lying level.

In side-light type module backlight, add that with CCFL (CCFL) light tube group of fluorescent tube reflector composition is placed on the side of LGP, when CCFL worked, electric energy can not be converted into luminous energy fully, can supervene a large amount of heat energy, especially two of fluorescent tube electrode area.At present existing side-light type module backlight as shown in Figure 1, wherein 10 is the glue frame, 11 is CCFL (CCFL), 12 is fluorescent tube reflector (being made up of metal level and reflecting layer), 13 is backboard, and 14 is light tube jacket (Rubber), is used for wrapping up its glue frame 10 of the low-pressure end of CCFL and high-pressure side electrode part (figure only drawn the distolateral Rubber of low pressure) and is set to enclosed type construction in the fluorescent tube low-pressure side, mainly be in order to prevent that dust from entering module internal backlight, and then cause picture bad.But after the CCFL11 long-term lighting, electrode place temperature obviously raises, its heat conduction step is as follows: electrode → light tube jacket → lampshade reflecting layer → lampshade metal level → backboard → air, because the lampshade reflecting layer often is a plastic material, heat-conducting effect far is worse than metal and air.Long-term some lantern festival causes module internal electrode tip heat backlight to assemble in a large number, as shown in Figure 2, wherein 15 is illustrated as heat.Fluorescent tube reflection case temperature is too high can influence CCFL briliancy and life-span, and even more serious is, when the temperature of fluorescent tube low-pressure end also can cause LGP hot melt phenomenon above uniform temperature, influences the service life of module backlight.

The utility model content

Technical problem to be solved in the utility model provides a kind of side-light type module backlight, improves the heat radiation of backlight module group lamp tube low-pressure end.

The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of side-light type module backlight, comprise light tube group, by fluorescent tube, fluorescent tube reflector and light tube jacket are formed, the electrode part of described light tube jacket parcel fluorescent tube low-pressure end and high-pressure side is used to protect described fluorescent tube; Backboard places described light tube group below, supports and fixing described light tube group; The glue frame coats described light tube group; Wherein, described glue frame is provided with perforate being positioned at fluorescent tube low-pressure end light tube jacket place, and described perforate is provided with filter screen.

In the above-mentioned side-light type module backlight, the aperture of described filter screen is less than 0.2mm.

In the above-mentioned side-light type module backlight, described fluorescent tube is a CCFL.

The utility model contrast prior art has following beneficial effect: the utility model has increased another heat radiation channel, and then has reached the purpose of efficiently radiates heat more by at glue frame and the corresponding position of fluorescent tube reflector perforate being set.

Description of drawings

Fig. 1 is the structural representation of existing side-light type module backlight.

Fig. 2 is the heat distribution schematic diagram of module backlight among Fig. 1.

Fig. 3 is the heat distribution schematic diagram of side-light type of the present utility model module backlight.

Fig. 4 is the dustproof schematic diagram of side-light type of the present utility model module backlight.

Among the figure:

10 glue frame 11CCFL fluorescent tubes, 12 fluorescent tube reflectors

13 backboards, 14 light tube jackets, 15 heats

16 perforates, 17 filter screens

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and exemplary embodiments.

Fig. 3 is the heat distribution schematic diagram of side-light type of the present utility model module backlight, and Fig. 4 is the dustproof schematic diagram of side-light type of the present utility model module backlight.

Please refer to Fig. 3 and Fig. 4, as shown in Figure 3, side-light type of the present utility model module backlight comprises light tube group, is made up of CCFL fluorescent tube 11, fluorescent tube reflector 12 and light tube jacket 14, and light tube jacket 14 is used for wrapping up the low-pressure end of CCFL and high-pressure side electrode part (figure only drawn the distolateral Rubber of low pressure); Backboard 13 places described light tube group below, supports and fixing described light tube group; Glue frame 10 coats described light tube group; Wherein, described glue frame 10 is provided with perforate 16 being positioned at light tube jacket 14 places, makes light tube jacket 14 and air contact, and described perforate 16 is provided with filter screen 17.So just increased another heat radiation channel: electrode → light tube jacket → air.And then reach the purpose of efficiently radiates heat more.Increase filter screen 17 to fill up this perforate 16, prevent that dust from entering module internal backlight, after increasing filter screen 17 structures, light tube jacket 14 still can directly contact with outside air, the particulate of module internal backlight (Particle) diameter generally requires less than 0.2mm, and the aperture of filter screen 17 is selected can realize filtering function less than 0.2mm, prevents that effectively dust from entering, as shown in Figure 4.

In sum, the utility model has increased another heat radiation channel, and then has reached the purpose of efficiently radiates heat more by in glue frame 10 and fluorescent tube low-pressure end light tube jacket 14 corresponding positions perforate 16 being set.

Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.

Claims

1, a kind of side-light type module backlight comprises:

Light tube group, by fluorescent tube, fluorescent tube reflector and light tube jacket are formed, and the electrode part of described light tube jacket parcel fluorescent tube low-pressure end and high-pressure side is used to protect described fluorescent tube;

Backboard places described light tube group below, supports and fixing described light tube group;

The glue frame coats described light tube group;

It is characterized in that described glue frame is provided with perforate being positioned at fluorescent tube low-pressure end light tube jacket place, described perforate is provided with filter screen.

2, side-light type according to claim 1 module backlight is characterized in that, the aperture of described filter screen is less than 0.2mm.

3, side-light type according to claim 1 and 2 module backlight is characterized in that, described fluorescent tube is a CCFL.