CN1811565A

CN1811565A - Back light module and light source structure thereof

Info

Publication number: CN1811565A
Application number: CN 200610019851
Authority: CN
Inventors: 陈圣杰; 吴志刚
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2006-03-01
Filing date: 2006-03-01
Publication date: 2006-08-02
Anticipated expiration: 2026-03-01
Also published as: CN100426092C

Abstract

The present invention discloses a light source structure applicable to a liquid crystal display. Said light source structure includes the following several portions: a printed circuit board on which a conducting circuit and a connector are set, in which said connector is placed on the undersurface of said printed circuit board and is electrically connected with said conducting circuit; a fixing piece which is placed on the top surface of printed circuit board and electrically connected with said conducting circuit; and a lamp tube, it has an external electrode, said external electrode is fixed and electrically connected on said fixing piece.

Description

Backlight module and light-source structure thereof

Technical field

The present invention relates to a kind of light-source structure, this light-source structure is specially adapted to the backlight liquid crystal display module.

Background technology

LCD mainly is made up of display panels and backlight module with matching; Display panels is made of two sheet glass substrates up and down, via various manufacture craft modes, with the formed arranged in matrix of thin film transistor (TFT) (TFT) on lower glass substrate, and irritating between the two sheet glass substrates up and down has liquid crystal layer (do not go up in figure and show), direction by each thin film transistor (TFT) (TFT) control liquid crystal molecule reaches different transmittances, and light source then is to be provided by backlight module.Please consult Fig. 1 and Fig. 2 A simultaneously, Fig. 1 represents existing liquid crystal display backlight module synoptic diagram, and the enlarged diagram of area I I in Fig. 2 A presentation graphs 1, this backlight module includes two pads 102 and is individually fixed in two sides in the framework 101 (the composition mode of each assembly of two ends, the left and right sides is identical on the figure, so be the example explanation only) with a side, at least one group of sheet metal component 103 is fixed on the pad 102, fixture (socket) 104 can be by being fixedly welded on the sheet metal component 103, or the mode of utilizing panel beating to be shaped makes fixture (socket) 104 and sheet metal component 103 integrally formed, the fluorescent tube 108 that again two ends is had fluorescent tube outer electrode 109 is inserted clamping in the fixture (socket) 104, in addition, on pad 102, also has a holes 105, utilize screw 107 to be locked on the sheet metal component 103 in an electric wire 106 this moment, make fluorescent tube 108, fixture (socket) 104, sheet metal component 103 and electric wire 106 all are to be electrically connected, and constitute a signal path; The back side of Fig. 2 B presentation graphs 2A, have on the framework 101 reserving hole 111 and and holes 105 alignings of pad 102, make electric wire 106 and extend to framework 101 back sides and be electrically connected control circuit board 110 via holes 105 and reserving hole 111.Framework by this kind backlight module, can provide signal to deliver on the sheet metal component 103 by the control circuit board that places framework 101 back sides via electric wire 106, be fixed in fluorescent tubes 108 all on the same sheet metal component 103 this moment and all can receive the same signal, thus the action of opening or closing.

But this kind need allow micro dust particle enter in the backlight module via holes 105 and reserving hole 111 via the mode of holes 105 and reserving hole 111 easily, makes LCD the situation of picture stain (Gomi) occur when display frame; Also because sheet metal component 103 and fixture 104 are panel beating shapings, the error on the processing technology thereof are more easily arranged, thereby influence the assembling of backlight module, also the metallic area because of sheet metal component 103 is bigger than ambassador's stray capacitance.

Summary of the invention

In order to reach manufacture craft precision height, easily assemble and to reduce stray capacitance, the present invention discloses a kind of light-source structure, be applicable to a LCD, this light-source structure comprises: a printed circuit board (PCB), have a conducting wire and a connector on it, wherein this connector is arranged at the bottom surface of this printed circuit board (PCB) and is electrically connected with this conducting wire; One fixture is arranged at this top surface of printed circuit board and electrically connects with this conducting wire; And a fluorescent tube, have an outer electrode, and this outer electrode is fixed and is electrically connected on this fixture.

The present invention discloses a kind of backlight module in addition, is applicable to a LCD, and this backlight module comprises: a framework; One control circuit board is disposed in this framework; One printed circuit board (PCB) is disposed in this framework and has a conducting wire and a connector that is electrically connected with this conducting wire on it, and wherein this connector is arranged at the bottom surface of this printed circuit board (PCB) and is electrically connected with this control circuit board; A plurality of fixtures are arranged at this top surface of printed circuit board and are electrically connected with this conducting wire; A plurality of fluorescent tubes, wherein each fluorescent tube all has an outer electrode, and this outer electrode is fixed and is electrically connected on this fixture; And at least one blooming piece, be arranged in this housing and be positioned at this a plurality of fluorescent tubes top.

Description of drawings

Fig. 1 is the conventional lighting sources structural representation;

Fig. 2 A is the enlarged diagram of area I I among Fig. 1;

Fig. 2 B is the schematic rear view of Fig. 2 A;

Fig. 3 is a liquid crystal display backlight module synoptic diagram of the present invention;

Fig. 4 is a light-source structure synoptic diagram of the present invention;

Fig. 5 A is the enlarged diagram of Fig. 4 zone V;

Fig. 5 B is the schematic rear view of Fig. 5 A.

The main element symbol description

101,301～framework;

102～pad;

103～sheet metal component;

104,304～fixture;

105～holes;

106,502～electric wire;

107～screw;

108,305～fluorescent tube;

109,306～fluorescent tube outer electrode;

110,503～control circuit board;

111,504～reserving hole;

302～printed circuit board (PCB);

303～conducting wire;

501～connector.

Embodiment

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, an embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:

Embodiment:

Fig. 3 is application liquid crystal display backlight module synoptic diagram of the present invention, as shown in the figure, and in the framework 301, respectively be equipped with a printed circuit board (PCB) 302 at two ends, the left and right sides, fluorescent tube 305 is positioned on the printed circuit board (PCB) 302, and diffuser plate 307 is positioned on the fluorescent tube 305, and prismatic lens 308 is positioned on the diffuser plate 307; For making the present invention more can know description, please consult Fig. 4 and Fig. 5 A simultaneously, Fig. 4 represents light-source structure synoptic diagram of the present invention, and Fig. 5 A is the enlarged diagram of Fig. 4 zone V; As shown in the figure, each printed circuit board (PCB) 302 about wherein this light-source structure comprises, has conducting wire 303 on it, a plurality of fixtures (socket) 304 are arranged at the end face of printed circuit board (PCB) 302 and are electrically connected with the conducting wire 303 that is distributed in printed circuit board (PCB) 302 end faces, and many fluorescent tubes 305, all has fluorescent tube outer electrode 306, and fluorescent tube outer electrode 306 is fixed and is connected electrically on the fixture (socket) 304, and this light-source structure places in the framework 301, fixture (socket) 304 fluorescent tubes of being fixed 305 on same conducting wire 303, all be in parallel electrically, be considered as same group of light source.Fig. 5 B is the schematic rear view of Fig. 5 A printed circuit board (PCB), there be at least one connector (connector) 501 to aim at the also conducting wire 303 of electrical connection graph 5A with the reserving hole 504 on the framework 301 on the bottom surface of printed circuit board (PCB) 302, and electric wire 502 is to be electrically connected control circuit board 503 and connector (connector) 501, control circuit board 503 provides signal to organize light source to each, its signal can be delivered to fluorescent tube 305 with fixture (socket) 304 at last via the conducting wire 303 that electric wire 502 and connector (connector) 501 are sent to Fig. 5 A, thereby controls the unlatching of each group light source or close.Consider the difficulty or ease and the demand of wiring, conducting wire 303 can be routed in end face or bottom surface (go up in figure and show) of printed circuit board (PCB) 302, also or all there is wiring on the two sides of printed circuit board (PCB) 302.On light source, according to the demand of various product, light guide plate and various blooming piece can be set again, as (as shown in Figure 3) such as diffuser plate, blast sheet, prismatic lenses, in order to improve the quality of light source.

Printed circuit board (PCB) of the present invention need not have a hole can be made electric wire pass through connector (connector) control circuit board and fluorescent tube are electrically connected, reduce the probability that micro dust particle enters backlight module, and print circuit plates making technology precision height can get preferable assembling degree of accuracy and reduce stray capacitance.

Claims

1. a light-source structure is applicable to a LCD, and this light-source structure comprises:

One printed circuit board (PCB) has a conducting wire and a connector, and this connector is arranged at the bottom surface of this printed circuit board (PCB) and is electrically connected with this conducting wire;

One fixture is arranged at this top surface of printed circuit board and is electrically connected with this conducting wire; And

One fluorescent tube has an outer electrode, and this outer electrode is fixed and is electrically connected on this fixture.

2. light-source structure as claimed in claim 1 more comprises a control circuit board and is electrically connected with this connector.

3. light-source structure as claimed in claim 1, wherein this conducting wire is arranged at this top surface of printed circuit board.

4. light-source structure as claimed in claim 1, wherein this conducting wire is arranged at the bottom surface of this printed circuit board (PCB).

5. a backlight module is applicable to a LCD, and this backlight module comprises:

One framework;

One control circuit board is disposed in this framework;

One printed circuit board (PCB) is disposed in this framework and has a conducting wire and a connector that is electrically connected with this conducting wire, and this connector is arranged at the bottom surface of this printed circuit board (PCB) and is electrically connected with this control circuit board;

A plurality of fixtures are arranged at this top surface of printed circuit board and are electrically connected with this conducting wire;

A plurality of fluorescent tubes, wherein each fluorescent tube all has an outer electrode, and this outer electrode is fixed and is electrically connected on this fixture; And

At least one blooming piece is arranged in this housing and is positioned at this a plurality of fluorescent tubes top.

6. backlight module as claimed in claim 5, wherein this at least one blooming piece comprises a diffuser plate, a prismatic lens and a blast sheet.

7. backlight module as claimed in claim 5 comprises that also a light guide plate is arranged in this housing and is positioned at this a plurality of fluorescent tubes top.

8. backlight module as claimed in claim 5, wherein this conducting wire is arranged at this top surface of printed circuit board.

9. backlight module as claimed in claim 5, wherein this conducting wire is arranged at the bottom surface of this printed circuit board (PCB).