CN100342481C

CN100342481C - Cold cathode fluorescent lamp assembly

Info

Publication number: CN100342481C
Application number: CNB2004100472935A
Authority: CN
Inventors: 麦哲魁; 蔡易宏
Original assignee: Toppoly Optoelectronics Corp
Current assignee: TPO Displays Corp
Priority date: 2004-05-28
Filing date: 2004-05-28
Publication date: 2007-10-10
Anticipated expiration: 2024-05-28
Also published as: CN1705074A

Abstract

The present invention relates to a cold cathode fluorescent lamp assembly which comprises a metal lamp bracket, a conducting piece and a cold cathode fluorescent lamp, wherein the conducting piece and the cold cathode fluorescent lamp are arranged in the metal lamp bracket. The conducting piece, the metal lamp bracket and the cold cathode fluorescent lamp are in contact, the outer surface of the cold cathode fluorescent lamp is coated with a conducting layer, the conducting layer and the conducting piece are in the contact so as to cause excess current generated in the light-emitting process of the cold cathode fluorescent lamp to be guided to the metal lamp bracket by the conducting layer and the conducting piece, and then the current is guided to the outside world by the metal lamp bracket.

Description

The cold-cathode fluorescence lamp assembly

Technical field

The present invention is a kind of cold-cathode fluorescence lamp assembly, and this cold-cathode fluorescence lamp component application is in LCD, and particularly a kind of cold-cathode fluorescence lamp assembly that can not glimmer, this cold-cathode fluorescence lamp assembly make the shown picture quality of LCD stable.

Background technology

LCD can be divided into three kinds of transmissive type liquid crystal display, reflective liquid-crystal display and semi-penetrated semi-reflected liquid crystal displays haply, and wherein transmissive type liquid crystal display is provided with backlight assembly (Backlight Module), so that light source to be provided.

Backlight assembly mainly by the light guide plate of light emitting source, guiding light going direction (Light Guide Panel, LGP), diffusion sheet (Diffuser) and plastic frame formations such as (Frame).The employed light emitting source of backlight assembly can be divided into cathode fluorescent tube (Cold Cathode Fluorescent Lamp haply; CCFL), thermal cathode fluorescent tube, light-emitting diode and electroluminescence sheet (EL) wait several, and present main flow is a cold-cathode fluorescence lamp.

Generally speaking, in order to promote the brightness of LCD, how with in the backlight assembly, the metal fixture design that will be used to support cold-cathode fluorescence lamp becomes to have highly reflective, but adopt the result of the metal lamp bracket of this material, but cause between cold-cathode fluorescence lamp and metal lamp bracket and produce equivalent capacity.When cold-cathode fluorescence lamp is subjected to knocking, if its ground connection design is bad, electric current too much in the cold-cathode fluorescence lamp will be derived, and be in a unsure state, cause cold-cathode fluorescence lamp that the phenomenon of flicker takes place, and then cause the shown picture quality instability of LCD.

Summary of the invention

The present invention provides a kind of cold-cathode fluorescence lamp assembly for addressing the above problem, make and can not produce equivalent capacity between cathode fluorescent tube and the metal lamp bracket, and can be in the charge stable state, so phenomenon that cathode fluorescent tube just can not glimmer, simultaneously the shown picture of LCD is also with regard to quite stable, so being, main purpose of the present invention provides a kind of cathode fluorescent tube assembly, so that the shown picture of LCD stablized, and make the present invention can be applicable to the LCD of multiple light inlet mode.

The disclosed cold-cathode fluorescence lamp assembly according to the present invention, comprise: the metal lamp bracket, electric-conductor and cold-cathode fluorescence lamp, wherein the metal lamp bracket has accommodation space, and accommodation space has exit end, electric-conductor is arranged at accommodation space, and contacting metal lamp bracket, and cold-cathode fluorescence lamp is arranged at accommodation space, the contact electric-conductor, and its light penetrates from exit end, cold-cathode fluorescence lamp includes fluorescent tube, high-field electrode portion and low-field electrode portion, and conductive layer, high-field electrode portion and low-field electrode partly are located at lamp tube ends, and conductive layer is coated the fluorescent tube outer surface, have a distance between coating ora terminalis and high-field electrode portion and low-field electrode portion, avoid conductive layer that the electric current of high-field electrode portion and low-field electrode portion is derived, and conductive layer contact electric-conductor, with with the ground structure of the electric current between metal lamp bracket and cold-cathode fluorescence lamp, guide to the external world by electric-conductor and metal lamp bracket.

For making purpose of the present invention, structural feature and function thereof there are further understanding, are described with reference to the accompanying drawings as follows:

Description of drawings

Fig. 1 is the profile of cold-cathode fluorescence lamp;

Fig. 2 is a profile of the present invention;

Fig. 3 is the schematic diagram of another embodiment of electric-conductor;

Fig. 4 makes the make use-case of the present invention as the light source of LCD;

Fig. 5 makes the present invention one make use-case again as the light source of LCD;

Fig. 6 makes the present invention make use-case as another of the light source of LCD; With

Fig. 7 makes another the make use-case of the present invention as the light source of LCD.

The reference numeral explanation:

Metal lamp bracket 10

Accommodation space 11

Exit end 12

Electric-conductor 20

Breach 21

Cold-cathode fluorescence lamp 30

Fluorescent tube 31

Phosphor layer 311

The 32a of high-field electrode portion

The 32b of low-field electrode portion

Fluorescent tube lid 321

Electrode 322

Lead 32

Conductive layer 33

Light guide plate 40

Reflecting element 41

Embodiment

As shown in Figures 1 and 2, the disclosed cathode fluorescent tube assembly according to the present invention comprises: metal lamp bracket 10, electric-conductor 20 and cathode fluorescent tube 30.

Metal lamp bracket 10 has highly reflective, and metal lamp bracket 10 has accommodation space 11, and accommodation space 11 has exit end 12 (referring to shown in Figure 3).

Electric-conductor 20 is arranged at accommodation space 11, and contacting metal lamp bracket 10, certainly, the shape of electric-conductor 20 can be designed to ring-type, and is sheathed on cold-cathode fluorescence lamp 30, or its shape can be designed to such as shown in Figure 3, electric-conductor 20 with a breach 21 is to accept cold-cathode fluorescence lamp 30.Certainly, electric-conductor 20 can be transparent rubber, to avoid blocking advancing of light.

Be filled with mercury molecule and gas in the cold-cathode fluorescence lamp 30, and be arranged at accommodation space 11, contact electric-conductor 20, and its light penetrates from exit end 12, cold-cathode fluorescence lamp 30 comprises: fluorescent tube 31, the 32a of high-field electrode portion and the 32b of low-field electrode portion, and conductive layer 33.

Fluorescent tube 31 is to be glass, and its inner surface is coated with

phosphor layer

311,32a of high-field electrode portion and the 32b of low-field electrode portion are divided into fluorescent tube 31 two ends, to produce light, 32a of high-field electrode portion and the 32b of low-field electrode portion comprise fluorescent tube lid 321, electrode 322 and lead 32 respectively, and fluorescent tube lid 321 is to be rubber, and it is arranged at fluorescent tube 31 1 ends, electrode 322 is arranged at fluorescent tube 31 inside, and by lead 32 connection electrode 322 and the external circuits that pass fluorescent tube lid 321.

Conductive layer 33 is to be material transparent, to avoid blocking advancing of light, conductive layer 33 is also coated fluorescent tube 31 outer surfaces, has a distance between the coating ora terminalis of conductive layer 33 and the 32a of high-field electrode portion and the 32b of low-field electrode portion, avoid conductive layer 33 that the electric current of 32a of high-field electrode portion and the 32b of low-field electrode portion is derived, and conductive layer 33 contact electric-conductors 20 the electric current of 30 of metal lamp bracket 10 and cold-cathode fluorescence lamps is passed through the ground structure of electric-conductor 20 and metal lamp bracket 10, guide to the external world.

When use is of the present invention, though adopt metal lamp bracket 10, but when cold-cathode fluorescence lamp 30 emits beam, the multiple current excessively that cold-cathode fluorescence lamp 30 is given birth to 32a of high-field electrode portion and the 32b of low-field electrode portion, just can be by the conductive layer 33 of its outer surface, guided to metal lamp bracket 10 by electric-conductor 20, and then the ground connection design by metal lamp bracket 10 guides to the external world with electric current, so the phenomenon that cold-cathode fluorescence lamp 30 just can not glimmer, and the shown picture of LCD also will be stablized.

Moreover, when applying the present invention to LCD, can adopt designs such as monolateral light inlet or bilateral light inlet, be illustrated in figure 4 as the design of monolateral light inlet, mainly be the exit end 12 that light guide plate 40 is arranged at metal lamp bracket 10, and as the side light type light guide plate, therefore after cold-cathode fluorescence lamp 30 emits beam, just can see through light guide plate 40, the exit direction of guiding light.

Be illustrated in figure 5 as the design of monolateral light inlet, be same as aforementionedly, light guide plate 40 also is arranged at the exit end 12 of metal lamp bracket 10, and an end of light guide plate 40 (differing from the incident end of light) is more set up reflecting element 41, so that the light that cold-cathode fluorescence lamp 30 is sent is directed to different exit direction.

As for the design that Figure 6 shows that bilateral light inlet, this mainly is that cold-cathode fluorescence lamp assembly shown in Figure 4 is arranged at both sides symmetrically, and make two light guide plate 40 that light is guided to identical exit direction, then be that the present invention is arranged at the full run-down type light guide plate as shown in Figure 7.

Based on above-mentioned, the disclosed cold-cathode fluorescence lamp assembly of the present invention can be with the electric current of 30 of metal lamp bracket 10 and cold-cathode fluorescence lamps as can be known, ground structure by electric-conductor and metal lamp bracket 10 guides to the external world, so that the phenomenon of cold-cathode fluorescence lamp 30 unlikely generation flickers, so picture meeting quite stable that LCD is shown, even the present invention also can be applicable to the LCD of the different light inlet mode of multiple employing, so application of the present invention is quite high.

The above person only is the present invention's preferred embodiment wherein, is not to be used for limiting practical range of the present invention; Be that all equalizations of being done according to claims scope of the present invention change and modification, be all claim of the present invention and contain.

Claims

1. cold-cathode fluorescence lamp assembly includes at least:

One lamp bracket, this lamp bracket have an accommodation space and an exit end;

One electric-conductor, this electric-conductor are arranged at this accommodation space and are electrically connected at this lamp bracket; And

One cold-cathode fluorescence lamp, this cold-cathode fluorescence lamp is arranged at this accommodation space and is electrically connected at this electric-conductor, and its light penetrates from this exit end, this cold-cathode fluorescence lamp includes a fluorescent tube, an one high-field electrode portion and a low-field electrode portion, an and conductive layer, wherein this high-field electrode portion and this low-field electrode partly are located at this lamp tube ends, to produce light, and this conductive layer is coated this fluorescent tube outer surface, contact this electric-conductor, has a distance between its coating ora terminalis and this high-field electrode portion and this low-field electrode portion, and this conductive layer contacts this electric-conductor, so that the electric current between this lamp bracket and this cold-cathode fluorescence lamp is guided to the external world.

2. cold-cathode fluorescence lamp assembly according to claim 1, it is characterized in that: this lamp bracket is the metal material for highly reflective.

3. cold-cathode fluorescence lamp assembly according to claim 1, it is characterized in that: this electric-conductor is to be material transparent.

4. cold-cathode fluorescence lamp assembly according to claim 1, it is characterized in that: this electric-conductor is to be rubber.

5. cold-cathode fluorescence lamp assembly according to claim 1, it is characterized in that: this cold-cathode fluorescence lamp is filled with mercury molecule and gas.

6. cold-cathode fluorescence lamp assembly according to claim 1, it is characterized in that: this inner surface of tube is coated with a phosphor layer.

7. cold-cathode fluorescence lamp assembly according to claim 1, it is characterized in that: this high-field electrode portion and this low-field electrode portion respectively comprise: fluorescent tube lid, an electrode and a lead, this fluorescent tube lid is arranged at this fluorescent tube one end, and this electrode is arranged at this fluorescent tube inside, and connects this electrode and external circuit by this lead that passes this fluorescent tube lid.

8. cold-cathode fluorescence lamp assembly according to claim 1, it is characterized in that: also include a light guide plate, this light guide plate is arranged at this exit end, to guide the direct of travel of the light that this cold-cathode fluorescence lamp sent.