CN201190958Y

CN201190958Y - Novel ultraviolet excited long life and high light efficiency flat light source module

Info

Publication number: CN201190958Y
Application number: CNU2008200465988U
Authority: CN
Inventors: 杨正名; 钱德锋; 张明; 柴国生; 高光义
Original assignee: Cnlight Co Ltd
Current assignee: Cnlight Co Ltd
Priority date: 2008-04-17
Filing date: 2008-04-17
Publication date: 2009-02-04
Anticipated expiration: 2018-04-17

Abstract

The utility model relates to a novel flat panel light source module group which is excited by ultraviolet light, having long service life and high light efficiency. The l flat panel light source module group comprises a lamp tube group as a radiation light source, an electronic ballast fit with the lamp tubes, a light output window A and a reflecting screen B which are parallel arranged, wherein the lamp tubes are parallel arranged between the light output window A and the reflecting screen B, the light output window A is a plane fluorescent screen, comprising a glass baseboard 3 and a fluorescent powder coat 6, the reflecting screen B comprises a glass baseboard 2 and a high reflection mirror membrane 4, the lamp tubes adopt ultraviolet lamps 1. When in use, the parallel ultraviolet lamps radiate ultraviolet light to directly excite the fluorescent powder coat 6. The fluorescent powder coat 6 is adhered on the glass baseboard 3 by using inorganic silicon gel as an adhesive. The fluorescent powder coat 6 is mixed with SiO2 particles. An intensifying membrane 12 is provided at the outer side of the plane fluorescent screen A. The ultraviolet excitation flat panel light source module group has simple production, low production cost, long service life and high light efficiency.

Description

The long-life of new ultra-violet optical excitation, high luminous efficiency flat light source module

Technical field

The utility model belongs to backlight source module and makes the field, is specifically related to a kind of long-life, high luminous efficiency flat light source module of new ultra-violet optical excitation.

Background technology

Figure 1 shows that the current conventional CCFL of employing makes the backlight source module structural representation of light source, in the back of light output window A is that one deck makes the finely dispersed diffuse transmission window 8 of light, then the CCFL 9 that a row and output window are arranged in parallel again, after the CCFL then is diffusion reflector 10, because the light of many CCFL emissions is very inhomogeneous, for obtaining enough uniform output backlight, diffuse transmission window 8 often is made of several layers of diffuser, the reflector efficiency of the diffusion reflector 10 of output window inboard is not high in addition, therefore adopt CCFL to make the back light module unit structure complexity of light source, cost height, light efficiency are also low.

Current LCD TV all adopts cold-cathode fluorescence lamp (CCFL) to make the backlight source module of light source, in order to obtain more uniform backlight effect, require very high to the uniformity of CCFL and the accuracy of size, particularly when screen size is big (＞29 inch) when fluorescent tube is very elongated its manufacture difficulty big, the particularly dusting uniformity and come unstuck, exhaust air technique is very complicated, therefore the manufacture difficulty of the backlight source module made from the elongated caliber CCFL of this kind is very big, cost is very high, fetch long price, and monopolized by minority offshore company.

CCFL is a kind of very ripe product, but in the use because the interaction of Hg and fluorescent material, in addition the Hg atom enters glass-tube and forms colour center and make the glass-tube blackout, and cause the minimizing of Hg, the fluorescent tube blackout, and the absorption of light radiation increased, fluorescent material aging under high energy electron ion bombardment in addition, and the various destructive factors of following degradation of cathode electronics emissivities are restricted the life-span of CCFL, this LCD TV image deepening after using the several years just, the main cause that color disappears.

The trial of adopting white light LEDs to do the LCD TV backlight source is also arranged in recent years, but the small display below 9 inch can practicality, greatly then not only cost is too high again for size, and the p-n junction heating problem of LED also is difficult to resolve and determines, and is difficult to popularize for the moment.

Summary of the invention

The purpose of this utility model is to provide that a kind of production technology is simple, production cost is low, the novel planar light source module by ultraviolet excitation of long service life, high light efficiency.

For achieving the above object, the utility model has been taked following technical scheme: a kind of long-life of new ultra-violet optical excitation, high luminous efficiency flat light source module, comprise one group of fluorescent tube that radiating light source uses, with the supporting electric ballast of fluorescent tube, the light output window A and the radiation shield B of parallel placement, described fluorescent tube is parallel to be placed between light output window A and the radiation shield B, light output window A is a flat faced screen, comprises glass substrate 3 and is coated in the fluorescent coating 6 of glass substrate 3 inboards; Radiation shield B comprises the high reflection mirror film 4 that glass substrate 2 and glass substrate 2 surfaces are coated with; Described fluorescent tube adopts ultraviolet lamp 1, the direct excitated fluorescent powder coating 6 of ultraviolet light of ultraviolet lamp 1 radiation that is arranged in parallel during running.

Described fluorescent coating 6 adopts inorganic silica gel to be bonded on the glass substrate 3 as binding agent.

Described fluorescent coating 6 is mixed with the SiO2 particulate in order to the light scattering rate that thickens fluorescent coating thickness and raising coating.

At described flat faced screen A arranged outside bright enhancement film 12.

Good effect of the present utility model: adopt the quartz ultraviolet light lamp to make radiating light source, the ultraviolet tube of some parallel placements in same plane is between flat faced screen A and the radiation shield B, the parallel placement of three, adopting the excitaton source of fluorescent coating 6 of the backlight source module of this structure is the ultraviolet light of mercury atom radiation, owing to be not coated with fluorescent material in the ultraviolet tube, the phenomenon that the mercury that fluorescent material and mercury atom effect can not occur and cause is absorbed content decline can not produce the phosphor structure destruction of causing because of the bombardment of the high energy electron ion in the discharge yet, the situation that performance decline efficient reduces, and because these two former thereby cause light decays, so long service life and have lasting high light efficiency.Conventional employing CCFL makes the backlight source module of light source then inevitably can be owing to these two reasons produce light decay faster, therefore and influence complete machine quality and life-span, in addition, direct illuminator is not a ultraviolet tube in the utility model, therefore the coherence request to ultraviolet tube size and performance parameter reduces, and do not need the very big slender glass tube of manufacture difficulty evenly to apply complicated lamp manufacturing process such as fluorescent material and roasted tube, therefore the production qualification rate of backlight source module of the present utility model significantly rises, and production cost significantly reduces.Scribble high reflection mirror film 4 on the radiation shield B, ultraviolet light is excitated fluorescent powder coating 6 after 4 reflections of high reflection mirror film, and the energy of ultraviolet tube radiation just can be fully used like this.

As further improvement of the utility model; fluorescent coating 6 adopts inorganic silica gel to be bonded on the glass substrate 3 as binding agent; mix without any organic substance; and be mixed with in order to thicken fluorescent coating thickness and to improve the SiO2 particulate of the light scattering rate of coating at fluorescent coating 6; fluorescent powder grain and whole coating are inorganic silica gel in the fluorescent screen of making; SiO2 particulate covering protection; can intercept harmful substances in air and steam destruction like this to fluorescent material; do not absorb ultraviolet light again; and the mixing of a certain amount of SiO2 powder; diluted phosphor's density; thereby luminescent coating thickness is increased; the light dispersion effect is strengthened, thereby obtains more uniform light output.

At flat faced screen A arranged outside bright enhancement film 12, make light to same direction or smaller angle scattering, to increase brightness.

Description of drawings

Fig. 1 be prior art adopt make the backlight source module structural representation of radiating light source with CCFL;

Fig. 2 is long-life, the high luminous efficiency flat light source modular structure schematic diagram of the utility model ultraviolet excitation;

Fig. 3 is long-life, another structural representation of high luminous efficiency flat light source module of the utility model ultraviolet excitation;

Wherein: quartz ultraviolet light lamp 1, glass substrate 2,3, high reflection mirror film 4, fluorescent coating 6, light output window A, radiation shield B, diffuse transmission window 8, CCFL 9, scattering reflector 10, bright enhancement film 12.

The specific embodiment

Below in conjunction with accompanying drawing the utility model specific embodiment is described in further details:

As shown in Figure 2: the long-life of new ultra-violet optical excitation described in the utility model, high luminous efficiency flat light source module mainly are made up of light output window A and radiation shield B, the parallel some electric ballasts that ultraviolet lamps reach and ultraviolet lamp is supporting as radiating light source that are placed between light output window A and the radiation shield B of parallel placement, ultraviolet lamp 1 preferably adopts the quartz ultraviolet light lamp of long service life, light output window A is a flat faced screen, mainly is made up of glass substrate 3 and the fluorescent coating 6 that is coated in glass substrate 3 inboards.This fluorescent coating 6 adopts inorganic silica gel to be bonded on the glass substrate 3 as binding agent, can mix the SiO2 particulate in order to the light scattering rate that thickens fluorescent coating thickness and raising coating in the fluorescent coating 6.Radiation shield B mainly is made up of the high reflection mirror film 4 that visible light is reflected that glass substrate 2 and glass substrate 2 surfaces are coated with.The ultraviolet light of ultraviolet lamp 1 radiation that is arranged in parallel during work excitated fluorescent powder coating 6 directly or after 4 reflections of high reflection mirror film.In order to increase brightness, at flat faced screen A arranged outside bright enhancement film 12, make light to same direction or smaller angle scattering, radiation direction is concentrated relatively.

Structure that Fig. 3 adopts and the difference of Fig. 2 are that its high reflection mirror film 4 is arranged on after the glass substrate 2.

Adopt the long-life of the ultraviolet excitation of the utility model structure, the plane that high luminous efficiency flat light source module can be used on the LCD, medical equipment is used not to have fields such as shadow light source.

Claims

1, a kind of long-life of new ultra-violet optical excitation, high luminous efficiency flat light source module, comprise one group of fluorescent tube that radiating light source uses, with the supporting electric ballast of fluorescent tube, the light output window (A) and the radiation shield (B) of parallel placement, described fluorescent tube is parallel to be placed between light output window (A) and the radiation shield (B), it is characterized in that: described smooth output window (A) is a flat faced screen, comprises glass substrate (3) and is coated in the inboard fluorescent coating (6) of glass substrate (3); The high reflection mirror film (4) that visible light is reflected that described radiation shield (B) comprises that glass substrate (2) and glass substrate (2) surface be coated with; Described fluorescent tube adopts ultraviolet lamp (1), the direct excitated fluorescent powder coating of ultraviolet light (6) of the ultraviolet lamp that is arranged in parallel during running (1) radiation.

2, the long-life of new ultra-violet optical excitation according to claim 1, high luminous efficiency flat light source module is characterized in that: described fluorescent coating (6) adopts inorganic silica gel to be bonded on the glass substrate (3) as binding agent.

3, the long-life of new ultra-violet optical excitation according to claim 1, high luminous efficiency flat light source module is characterized in that: described fluorescent coating (6) is mixed with the SiO2 particulate in order to the light scattering rate that thickens fluorescent coating thickness and raising coating.

4, the long-life of new ultra-violet optical excitation according to claim 1, high luminous efficiency flat light source module is characterized in that: at described flat faced screen (A) arranged outside bright enhancement film (12).