CN100359388C

CN100359388C - Two-D display and backlight modular

Info

Publication number: CN100359388C
Application number: CNB2004100861647A
Authority: CN
Inventors: 何雅婷; 谢宗勋
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2004-10-19
Filing date: 2004-10-19
Publication date: 2008-01-02
Anticipated expiration: 2024-10-19
Also published as: CN1601348A

Abstract

The present invention relates to a plane display and a back light module, wherein the plane display comprises a first casing, a second casing, a light guide assembly, a plane display panel, a concave part and a light source base. The second casing is fixedly connected with the first casing; the light guide assembly is arranged between the first and the second casings and is provided with a light incident surface; the plane display panel is provided with a display surface which is arranged between the first casing and the light guide assembly; the concave part is formed among the first and the second casings and the light incident surface, the concave part is provided with an opening, and the opening direction is basically in parallel with the display surface; the light source base is fixedly arranged in the concave part and is provided with a third casing and a light emitting assembly which is arranged in the third casing.

Description

Flat-panel screens and backlight module

Technical field

The present invention relates to a kind of flat-panel screens, particularly a kind of flat-panel screens that is provided with the backlight module of ease of assembly replacing.

Background technology

Generally speaking, known flat-panel screens all is provided with backlight module (backlight), to provide display surface required brightness.With LCD (LCD) is example, the common kenel of backlight module can be adopted the straight-down negative configuration, also can be arranged at a side of monitor body, common light source then can adopt cold cathode fluorescent lamp (CCFL), external electrode fluorescent tube (EEFL), light emitting diode (LED) or electroluminescence sheet (Electroluminescence, different kinds such as EL).

At first consult Fig. 1, as United States Patent (USP) 5,537, No. 296 disclosed known plane display device structures, during assembling one fluorescent tube positioning unit 26 (lamp guiding unit) is combined with a lamp socket unit 24 (lampholding unit), backlight module 20 is fixed in a side of light guide plate 22.As shown in the figure, above-mentioned fluorescent tube positioning unit 26 comprises two fluorescent tubes 44, reflectance coating 42 and loam cake 38, and wherein said reflectance coating 42 is coated on fluorescent tube 44 outsides with loam cake 38, and the lamp socket unit 24 of below correspondence then is made up of a lower cover 28 and following reflectance coating 36.

At above-mentioned known backlight modular structure,, all be along move perpendicular to the direction of light guide plate 22 (direction as shown by arrows) when dismounting or when installing described fluorescent tube positioning unit 26.Yet not only mechanism is comparatively complicated and difficult assembling to take this known design, and cost is also higher relatively simultaneously.Wherein, therefore influence and hinder the heat radiation of fluorescent tube 44 easily because known loam cake 38 is to make for plastic material.

Summary of the invention

Because the shortcoming of described known backlight module the invention provides a kind of flat-panel screens, comprise one first housing, one second housing, a leaded light component, a two-d display panel, a depressed part and a light source base.Described second housing is fixedlyed connected with first housing.Leaded light component is arranged between first, second housing, and an incidence surface is arranged.Described two-d display panel has a display surface, between first housing and leaded light component.Described depressed part is formed between first, second housing and the incidence surface, and wherein the recessed direction of depressed part is basically parallel to described display surface.Described light source base removably is fixedly set in the depressed part, has one the 3rd housing and a luminescence component, and wherein luminescence component is arranged in the 3rd housing.

In a preferred embodiment, described first housing has one first joint portion, and the 3rd housing has one second joint portion, and first joint portion engages with second joint portion, so that light source base is fixed in the described depressed part.

In a preferred embodiment, described first joint portion is a draw-in groove, and second joint portion is a trip.

In a preferred embodiment, described the 3rd housing is a U-shaped structure, and coats luminescence component partly.

In a preferred embodiment, described first housing and the 3rd housing are metal material.

In a preferred embodiment, described second housing is a plastic material.

In a preferred embodiment, described luminescence component is cathode fluorescent tube (CCFL).

The present invention also provides a kind of assemble method of backlight module, and the assemble method of this backlight module comprises: one first housing is provided; One second housing, fixedly said first shell is provided; One leaded light component is provided, is arranged between first, second housing, wherein leaded light component has an incidence surface and an exiting surface; Form a depressed part between first, second housing and incidence surface, wherein the recessed direction of above-mentioned depressed part is basically parallel to described exiting surface; And, one light source base is provided, comprises one the 3rd housing and a luminescence component, wherein the 3rd housing is to coat luminescence component partly, breach with the 3rd housing during assembling is right against described depressed part, and with the direction that is basically parallel to exiting surface light source base is inserted in the depressed part.

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, also elaborate in conjunction with the accompanying drawings especially exemplified by preferred embodiment below.

Description of drawings

Fig. 1 is the synoptic diagram of the known backlight module of expression;

Fig. 2 a is the synoptic diagram that the flat-panel screens body of expression one embodiment of the invention combines with light source base;

Fig. 2 b is along the sectional view of IIA-IIA ' among the presentation graphs 2a;

Fig. 2 c is the synoptic diagram that light source base and body utilize screw to lock among expression the present invention;

Fig. 3 is the synoptic diagram of flat-panel screens after combination of expression the 2nd figure; And

Fig. 4 is along the sectional view of IIIA-IIIA ' in the presentation graphs 3.

The reference numeral explanation:

20～backlight module

22～light guide plate

24～lamp socket unit

26～fluorescent tube positioning unit

28～lower cover

36～reflectance coating

38～loam cake

42～reflectance coating

44～fluorescent tube

B～backlight module

B '～depressed part

C1～first housing

C2～second housing

D～display surface

F～optical thin film

G～leaded light component

G1～incidence surface

G2～exiting surface

L～fluorescent tube portion

L '～luminescence component

M～body

J1～first joint portion

J2～second joint portion

P～two-d display panel

R～the 3rd housing

S～screw

S1～first side

S2～second side

Embodiment

At first consult Fig. 2 a, this figure is the synoptic diagram that the flat-panel screens body of expression one embodiment of the invention combines with a light source base.Flat-panel screens in Fig. 2 a for example is a LCD (LCD), and it mainly is made up of a body M and a light source base B.Above-mentioned body M comprises one first housing C1, one second housing C2 and a leaded light component G, wherein this leaded light component G is arranged between described first, second housing C1, the C2, and this first housing C1 for example is that a metal material, this second housing C2 for example are a plastic material.

Shown in Fig. 2 a, described light source base B is provided with the illuminating part L of a plurality of luminescence component L ' by one and the 3rd housing R of a metal material is formed, during assembling at first in conjunction with above-mentioned illuminating part L and the 3rd housing R, make the 3rd housing R coat luminescence component L ' partly, the light source base B after then will making up again is inserted in the position of monitor body M below first side S1 along direction shown in the arrow.Thus, can form a backlight module, in order to the display surface D of body M central authorities one to be provided stable light source by described leaded light component G, light source base B and first, second housing C1, C2.In the present embodiment, described luminescence component L ' can be general cathode fluorescent tube (Cold Cathode FluorescentLamp, CCFL) or the external electrode fluorescence lamp pipe (External Electrode Fluorescent Lamp, EEFL).

Have, have one first joint portion J1 on the right-hand second side S2 of body M in Fig. 2 a, wherein the first joint portion J1 can be arranged on the described first housing C1 or the second housing C2.During assembling light source base B is inserted in the first side S1 of body M below, and one second joint portion J2 on the 3rd housing R is engaged with the described first joint portion J1, firmly to connect light source base B and body M.Shown in Fig. 2 a, the described first joint portion J1 is a draw-in groove, the second joint portion J2 then is corresponding trip, yet also can take other different juncture, for example the first joint portion J1 can be a screw, light source base B can be locked in the first side S1 (shown in Fig. 2 c) of body M below with screw S.

Then consult 2a and 2b figure in the lump, wherein Fig. 2 b is along the sectional view of IIA-IIA ' among the presentation graphs 2a.Shown in Fig. 2 b, described leaded light component G is arranged between first, second housing C1, the C2, and form a depressed part B ' between the incidence surface G1 of first, second housing C1, C2 and leaded light component G, wherein the recessed direction of depressed part B ' is arranged essentially parallel to an exiting surface G2 of leaded light component G top.

As previously mentioned, by formed depressed part B ' between described first, second housing C1, C2 and the leaded light component G, light source base B can be inserted depressed part B ' along direction shown in the arrow during assembling, and then be incorporated into the first side S1 of body M.In addition, engage with the second joint portion J2 on the 3rd housing R, can make light source base B firmly be connected with body M by crossing the first joint portion J1 be positioned on the S2 of second side.

Then consult the 3rd, 4 figure again, wherein Fig. 3 is the synoptic diagram of expression flat-panel screens after assembling, and Fig. 4 then is along the sectional view of IIIA-IIIA ' in the presentation graphs 3.In Fig. 4, described light source base B inserts along the recessed end of the direction (direction as shown by arrows) that is parallel to exiting surface G2 from depressed part B ', and then is incorporated into the first side S1 of body M.Wherein, the 3rd housing R is the structure that takes the shape of the letter U, and coats described luminescence component L ' partly, and the breach with the 3rd housing R during assembling is right against described depressed part B ', and the light source base B that incites somebody to action is inserted in the first side S1 of body M.Because the 3rd housing R inner surface has reflectorized material, therefore can reflect the light that described luminescence component L ' is sent, and it is imported in right-hand leaded light component G.

As shown in Figure 4, light after the leaded light component G internal delivery by above exiting surface G2 penetrate, pass the display surface D above the two-d display panel P afterwards and in regular turn through optical thin film F.Wherein, the exiting surface G2 of leaded light component G is parallel with the display surface D of two-d display panel P top, and described optical thin film F and two-d display panel P are arranged between the first housing C1 and the leaded light component G.

In sum, because the serviceable life of backlight module is limited, and often need to carry out the action of replacing because of the fluorescent tube fault, the invention provides a kind of flat-panel screens, owing to light source base B is inserted in a side of display along the direction that is parallel to display surface D, and not only mechanism is simple and can reduce manufacturing cost significantly, simultaneously because it has assembling and is easy to advantage, therefore can promote production efficiency.In addition, another characteristic of the present invention are: light source base B only needs to install the 3rd housing R additional in the fluorescent tube outside, therefore more helps the heat radiation of fluorescent tube than the mechanism design of traditional backlight module.

Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit scope of the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; certainly can do a little changes and retouching, so protection scope of the present invention should be with being as the criterion that claims scope is defined.

Claims

1. backlight module comprises:

One first housing;

Second housing of one fixedly connected this first housing;

One leaded light component, this leaded light component are arranged between this first, second housing, have an incidence surface and an exiting surface;

One depressed part, this depressed part are formed between this first, second housing and this incidence surface, and wherein the recessed direction of this depressed part is basically parallel to this exiting surface; And

One light source base, this light source base removably is fixedly set in this depressed part, has one the 3rd housing and a luminescence component, and wherein this luminescence component is arranged in the 3rd housing.

2. backlight module as claimed in claim 1 is characterized in that: this first housing has one first joint portion, and the 3rd housing has one second joint portion, and this first joint portion engages with this second joint portion, so that this light source base is fixed in this depressed part.

3. backlight module as claimed in claim 2 is characterized in that: this first joint portion is a draw-in groove, and this second joint portion is a trip.

4. backlight module as claimed in claim 2 is characterized in that: this first joint portion is a screw, and a screw passes this screw to lock this light source base in this depressed part.

5. backlight module as claimed in claim 1 is characterized in that: the 3rd housing is a U-shaped structure, and coats this luminescence component partly.

6. backlight module as claimed in claim 1 is characterized in that: the 3rd housing is a metal material.

7. backlight module as claimed in claim 1 is characterized in that: this luminescence component is a cathode fluorescent tube.

8. flat-panel screens comprises:

One first housing;

Second housing of one fixedly connected this first housing;

One leaded light component, this leaded light component are arranged between this first, second housing, have an incidence surface;

One two-d display panel, this two-d display panel has a display surface, between this first housing and this leaded light component;

One depressed part, this depressed part are formed between this first, second housing and this incidence surface, and wherein the recessed direction of this depressed part is basically parallel to this display surface; And

One light source base, this light source base removably is fixedly set in this depressed part, has one the 3rd housing and a luminescence component, and wherein this luminescence component is positioned at the 3rd housing.

9. flat-panel screens as claimed in claim 8, it is characterized in that: this first housing has one first joint portion, and the 3rd housing has one second joint portion, and this first joint portion engages with this first joint portion, so that this light source base is fixed in this depressed part.

10. flat-panel screens as claimed in claim 9 is characterized in that: this first joint portion is a draw-in groove, and this second joint portion is a trip.

11. flat-panel screens as claimed in claim 9 is characterized in that: this first joint portion is a screw, and a screw passes this screw to lock this light source base in this depressed part.

12. flat-panel screens as claimed in claim 8 is characterized in that: the 3rd housing is a U-shaped structure, and coats this luminescence component partly.