CN201104276Y

CN201104276Y - Side light type backlight module

Info

Publication number: CN201104276Y
Application number: CNU2007201934860U
Authority: CN
Inventors: 蔡光隆; 艾祖华; 郭俊良; 王濬清; 林学良
Original assignee: Delta Optoelectronics Inc
Current assignee: Delta Electronics Inc; Delta Optoelectronics Inc
Priority date: 2007-11-22
Filing date: 2007-11-22
Publication date: 2008-08-20
Anticipated expiration: 2017-11-22

Abstract

The utility model discloses a side light type backlight module, comprising a first luminescence unit, a second luminescence unit, a first high pressure linkage unit and a second high pressure linkage unit. The first luminescence unit has a first electrode and a second electrode, the second luminescence unit has a third electrode and a fourth electrode, wherein, the fourth electrode is in electric connection with the second electrode of the first luminescence unit; the first high pressure linkage unit is in electric connection with the first electrode of the first luminescence unit, the second high pressure linkage unit is in electric connection with the third electrode of the second luminescence unit. The side light type backlight module of the utility model can save connecting components, thereby saving the cost.

Description

Side light type back light module

Technical field

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

Background technology

Since liquid crystal display (LCD) device compared to traditional cathode ray tube (CRT) display have that volume is little, low power consumption, low radiation, and the technology of LCD can be compatible etc. with semiconductor process techniques advantage.Therefore, LCD replaces cathode-ray tube display gradually, becomes the main flow of display in recent years.

General liquid crystal indicator mainly comprises liquid crystal display and backlight module, and wherein backlight module roughly can be divided into two types of Staight downward type backlight module and side light type backlight modules again.Yet, no matter be the backlight module of which kind of kenel, all need to drive luminescence unit in the backlight module by at least one drive circuit board, at present Chang Zuowei luminescence unit person is a cold cathode fluorescent lamp, and is that the high-voltage driven signal that provides via drive circuit board is driven in order to driven for emitting lights unit person.

Please refer to Fig. 1, it is the synoptic diagram of known pair of fluorescent tube side light type back light module.Two fluorescent tubes 11 and drive circuit board 13 connect, and assembling instruction is as follows.Two electrode tips 111,112 of each fluorescent tube 11 are electrically connected at high pressure resistant respectively and have the high-voltage conducting wires 12 of

splicing ear

121 or 122, and electrode tip 111 is linked to the high-voltage output terminal V of drive circuit board 13 via the splicing ear 121 of high-voltage conducting wires 12 _H, electrode tip 112 is linked to the earth terminal GND of drive circuit board 13 via splicing ear 122 by another high-voltage conducting wires 12.At this moment, the high-voltage driven signal exported of drive circuit board 13 can be via high-voltage output terminal V _H, splicing ear 121 and high-voltage conducting wires 12 and be sent to fluorescent tube 11, to drive fluorescent tube 11.

From the above, fluorescent tube need use two high pressure splicing ears, two high-voltage conducting wires, and when using more fluorescent tube in the backlight module, its quantity will be that multiple increases, and cost also certainly will increase thereupon.

The utility model content

Because above-mentioned problem, the purpose of this utility model is for providing a kind of high pressure connecting elements and cost-effective side light type back light module saved.

For reaching above-mentioned purpose, the utility model provides a kind of side light type back light module, and it comprises first luminescence unit, second luminescence unit, the first high pressure linkage unit and the second high pressure linkage unit.First luminescence unit has first electrode and second electrode, and second luminescence unit has third electrode and the 4th electrode.Wherein, second electrode of the 4th electrode and first luminescence unit electrically connects.First electrode of the first high pressure linkage unit and first luminescence unit electrically connects, and the third electrode of the second high pressure linkage unit and second luminescence unit electrically connects.

From the above, according to side light type back light module of the present utility model, by terminal, lead-in wire or fusion techniques, so that the 4th electrode of second electrode of first luminescence unit and second luminescence unit electrically connects.Therefore, in side light type back light module of the present utility model, two luminescence units only need use two high pressure linkage units to be connected with first luminescence unit and the second luminescence unit electrode respectively.Therefore, compared to known technology, side light type back light module of the present utility model can be saved connecting elements, and then saves cost.

Description of drawings

Fig. 1 is the synoptic diagram of known pair of fluorescent tube side light type back light module;

Fig. 2 is the structural representation of the side light type back light module of the utility model preferred embodiment;

Fig. 3 A to Fig. 3 C is the connection diagram of the side light type back light module of the utility model preferred embodiment; And

Fig. 4 is the synoptic diagram of the drive signal of the utility model preferred embodiment side light type back light module.

Description of reference numerals

11: fluorescent tube 111,112: electrode tip

12,241,251: high-voltage conducting wires 121,122: splicing ear

V _H: high-voltage output terminal 13: drive circuit board

2: side light type back light module 21: light source

211,212: luminescence unit 22: light guide plate

221: exiting surface 23: housing

25: the second high pressure linkage units of 24: the first high pressure linkage units

242,252,262,263: high pressure splicing ear 26: drive circuit board

261: driver element 271,272: plain conductor

28: lead-in wire 29: metallic sheath

E1, E2, E3, E4: electrode V ₁, V ₂: drive signal

V _P: peak value

Embodiment

Hereinafter with reference to the side light type back light module of relevant indicators explanation according to the utility model preferred embodiment.

Please refer to Fig. 2, the side light type back light module 2 of the utility model preferred embodiment comprises light source 21, light guide plate 22 and housing 23.Light source 21 and light guide plate 22 are arranged in the housing 23.Light guide plate 22 has exiting surface 221, and light source 21 is arranged at a side vertical with exiting surface 221.

Please be simultaneously with reference to Fig. 3 A, side light type back light module 2 comprises the first high pressure linkage unit 24, the second high pressure linkage unit 25 and drive circuit board 26.

Light source 21 comprises a plurality of luminescence units, in the present embodiment, has first luminescence unit 211 and second luminescence unit 212 is the example explanation with light source 21.In this preferred embodiment, first luminescence unit 211 and second luminescence unit 212 are cold-cathode tube (CCFL) or external electrode fluorescent lamp pipe (EEFL).

First luminescence unit 211 has the first electrode E1 and the second electrode E2, and second luminescence unit 212 has third electrode E3 and the 4th electrode E4.Wherein, the second electrode E2 and the 4th electrode E4 electrically connect.

Side light type back light module of the present utility model is by terminal, lead-in wire, metallic sheath welding or fusion techniques, so that the 4th electrode E4 of the second electrode E2 of first luminescence unit 211 and second luminescence unit 212 electric connection, but not as limit.Wherein fusion techniques comprises electric welding fusion techniques or gas welding fusion techniques.

The second electrode E2 of present embodiment has first plain conductor, 271, the four electrode E4 and has second plain conductor 272.First plain conductor 271 can utilize welding or fusion techniques and second plain conductor 272 to link, and the 4th electrode E4 and the second electrode E2 are electrically connected.At this, fusion techniques can comprise electric welding fusion techniques or gas welding fusion techniques.Please refer to Fig. 3 A, bend first plain conductor 271 of the second electrode E2 and second plain conductor 272 of the 4th electrode E4, make its electric connection with welding or fusion techniques again.

First plain conductor 271 and second plain conductor 272 also can electrically connect by terminal.

First plain conductor 271 of the second electrode E2 and second plain conductor 272 of the 4th electrode E4 can go between and 28 it be electrically connected mutually, it can utilize welding, welding or utilize physical construction and lead-in wire 28 is electrically connected with the second electrode E2 and the 4th electrode E4 respectively, shown in Fig. 3 B.In the present embodiment, lead-in wire 28 can be bonding jumper or metal bar.

Except that above-mentioned connected mode, please refer to Fig. 3 C, lead-in wire 28 also can be replaced by metallic sheath 29.Wherein second plain conductor 272 of first plain conductor 271 of first luminescence unit 211 and second luminescence unit 212 all is arranged in the metallic sheath 29, and electrically connects with metallic sheath 29 with welding or fusion techniques.

Referring again to Fig. 3 A, the first high pressure linkage unit 24 has first high-voltage conducting wires 241 and the first high pressure splicing ear, 242, the second high pressure linkage units 25 have second high-voltage conducting wires 251 and the second high pressure splicing ear 252.Wherein first high-voltage conducting wires 241 electrically connects with the first high pressure splicing ear 242 and the first electrode E1 respectively, and second high-voltage conducting wires 251 electrically connects with the second high pressure splicing ear 252 and third electrode E3 respectively.

Drive circuit board 26 comprises driver element 261, the 3rd high pressure splicing ear 262 and the 4th high pressure splicing ear 263.The 3rd high pressure splicing ear 262 electrically connects with the positive high voltage end of driver element 261 and the first high pressure splicing ear 242 respectively, and the 4th high pressure splicing ear 263 electrically connects with the negative high-voltage end and the second high pressure splicing ear 252 of driver element 261 respectively.

Driver element 261 produces the drive signal V of the alternating current with first phase place ₁And has a drive signal V of the alternating current of second phase place ₂Drive signal V ₁Drive first luminescence unit 211 via the 3rd high pressure splicing ear 262, the first high pressure linkage unit 24.Drive signal V ₂Drive second luminescence unit 212 via the 4th high pressure splicing ear 263, the second high pressure linkage unit 25.In this preferred embodiment, the drive signal V of the positive high voltage end of driver element 26 output ₁Reach the drive signal V that negative high-voltage end is exported ₂, its peak value V _PAll identical with frequency, and phase differential is 180 degree, as shown in Figure 4.

What deserves to be mentioned is, when using dual-lamp structure, the side light type back light module 2 of present embodiment only need use two high pressure splicing ears (the first high pressure splicing ear 242 and the second high pressure splicing ear 252), and two high-voltage conducting wires (first high-voltage conducting wires 241 and second high-voltage conducting wires 251) drive first luminescence unit 211 and second luminescence unit 212.In other words, one group of dual-lamp structure only needs two high pressure splicing ears and two high-voltage conducting wires, when needing more dual-lamp structure in the backlight module, can significantly reduce the quantity of high pressure connecting elements and then reduces cost.

In sum, side light type back light module of the present utility model is by lead-in wire or fusion techniques, so that the 4th electrode of second electrode of first luminescence unit and second luminescence unit electrically connects.In known technology, a luminescence unit need use two high pressure splicing ears and two high-voltage conducting wires, and a luminescence unit of side light type back light module of the present utility model only need use a high pressure splicing ear and a high-voltage conducting wires.Therefore, side light type back light module of the present utility model can be saved connecting elements, and then saves cost.

The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present utility model and category, and, all should be included in the appended claim its equivalent modifications of carrying out or change.

Claims

1, a kind of side light type back light module is characterized in that comprising:

First luminescence unit has first electrode and second electrode;

Second luminescence unit has third electrode and the 4th electrode, and this second electrode of the 4th electrode and this first luminescence unit electrically connects;

The first high pressure linkage unit is with this first electrode electric connection of this first luminescence unit; And

The second high pressure linkage unit is with this third electrode electric connection of this second luminescence unit.

2, side light type back light module as claimed in claim 1 is characterized in that the 4th electrode of this second luminescence unit and this second electrode of this first luminescence unit electrically connect with terminal, lead-in wire, metallic sheath, welding, electric welding welding or gas welding fusion techniques.

3, side light type back light module as claimed in claim 1 is characterized in that this second electrode has first plain conductor, and the 4th electrode has second plain conductor.

4, side light type back light module as claimed in claim 3 is characterized in that this first plain conductor and this second plain conductor electrically connect by terminal.

5, side light type back light module as claimed in claim 3 is characterized in that this first plain conductor and this second plain conductor electrically connect with welding, electric welding welding or gas welding fusion techniques by lead-in wire or metallic sheath.

6, side light type back light module as claimed in claim 3 is characterized in that bending this first plain conductor of this first electrode and this second plain conductor of the 4th electrode, electrically connects with welding, electric welding welding or gas welding fusion techniques.

7, side light type back light module as claimed in claim 1 is characterized in that also comprising drive circuit board, electrically connects with this first high pressure linkage unit and this second high pressure linkage unit.

8, side light type back light module as claimed in claim 7 is characterized in that the first high pressure splicing ear that this first high pressure linkage unit has first high-voltage conducting wires and is connected with this first high-voltage conducting wires.

9, side light type back light module as claimed in claim 8 is characterized in that this first electrode of this first high-voltage conducting wires and this first luminescence unit electrically connects, and the 3rd high pressure splicing ear of this first high pressure splicing ear and this drive circuit board electrically connects.。

10, side light type back light module as claimed in claim 8 is characterized in that the second high pressure splicing ear that this second high pressure linkage unit has second high-voltage conducting wires and is connected with this second high-voltage conducting wires.

11, side light type back light module as claimed in claim 10 is characterized in that this third electrode of this second high-voltage conducting wires and this second luminescence unit electrically connects, and the 4th high pressure splicing ear of this second high pressure splicing ear and this drive circuit board electrically connects.

12, as claim 9 or the 11st described side light type back light module, it is characterized in that this drive circuit board also comprises:

Driver element electrically connects with the 3rd high pressure splicing ear and the 4th high pressure splicing ear.

13, side light type back light module as claimed in claim 12, it is characterized in that this driver element produces the drive signal of the alternating current with first phase place and has the drive signal of the alternating current of second phase place, respectively by the 3rd high pressure splicing ear and the output of the 4th high pressure splicing ear.

14, the described side light type back light module of claim 13 is characterized in that the drive signal of the alternating current of this first phase place and this second phase place having identical peak value and frequency, this first phase place and these second phasic difference 180 degree mutually.

15, side light type back light module as claimed in claim 1 is characterized in that also comprising light guide plate, and this first luminescence unit and this second luminescence unit are arranged at a side vertical with the exiting surface of this light guide plate.

16, side light type back light module as claimed in claim 1 is characterized in that this first luminescence unit and this second luminescence unit are cold-cathode tube, external electrode fluorescent lamp pipe or HCFL.