CN100492557C

CN100492557C - Transformer of converter

Info

Publication number: CN100492557C
Application number: CNB2004100837775A
Authority: CN
Inventors: 张君毅; 陈其铭
Original assignee: GUANGQUAN SCIENCE AND TECHNOLOGY Co Ltd; Yao Sheng Electronic Co Ltd
Current assignee: GUANGQUAN SCIENCE AND TECHNOLOGY Co Ltd; Yao Sheng Electronic Co Ltd
Priority date: 2004-10-19
Filing date: 2004-10-19
Publication date: 2009-05-27
Anticipated expiration: 2024-10-19
Also published as: CN1763874A

Abstract

The invention provides a voltage transformer of current changer. Wherein, making two ends of winding frame to coil the primary side excitation winding independently; arranging the secondary induction winding in the primary side excitation winding; making said two windings couple and stabilize the output of induced voltage to drive one or more CCFL simultaneously. This invention can improve stability and reliability, and then obtain more even backlight light source.

Description

The transformer of converter

Technical field

The present invention is a kind of transformer of converter, refers to a kind of being applied in the converter module especially, need obtain the purpose of the transformer of voltage-phase 180 degree outputs or many group output changes of current.

Background technology

By general LCD panel is as the backlight (back light) of cold cathode fluorescent lamp (CCFL) as this panel by discharge lamp (discharge lamp), these discharge lamps then see through converter (Inverter) circuit and drive, and, all adopt converter transformer to drive usually in order to meet the demand of high voltage output;

As Fig. 1, shown in Figure 2, be respectively general existing converter transformer on look exploded view and side-looking exploded view, should existing transformer mainly be wherein by drum stand (Bobbin) 1, first unshakable in one's determination 14 and second 15 formations unshakable in one's determination, establish a plurality of separation troughs 11 in lateral margin is prominent, and form primary side winding region 13 and secondary side winding region 12 respectively, to connect power supply and load respectively, wherein according to desirable load user mode, with the corresponding discharge lamp of a secondary side winding, but because the increase day by day of this LCD panel size, use the length and the quantity of fluorescent tube also to increase relatively, it uses driving voltage to increase thereupon, so in the winding mode of secondary side winding region 12, then utilize between the separation trough 11 voltage divider principle every coiling window A, height according to working voltage decides the number of using separation trough 11, the product reliability is improved, right general lamp tube driving method promptly utilizes converter transformer one end output HIGH voltage, make pipe end electrode band flow of charge earth terminal, and then cause the high voltage end electrode to bear higher electric charge, cause the brightness of high voltage end always to be slightly larger than the ground connection side, and add that again fluorescent tube length increases day by day even presents the L type, the form of U type, more cause this kind pipe end brightness disproportionation phenomenon to become clear day by day, especially the aging phenomenon of electrode, real problem that must be to be solved.

There is following defective in existing technology:

1, the trend that can't increase day by day in response to the LCD panel size.

2, the brightness of high voltage end always is slightly larger than the ground connection side.

3, easily cause lamp tube ends brightness disproportionation phenomenon.

Summary of the invention

The object of the present invention is to provide a kind of transformer of converter, can improve the characteristic of back light stability uniformly light-emitting.

Purpose of the present invention provides a kind of transformer of converter, and it comprises:

Drum stand has a hollow bulb, and in its lateral margin differentiation first winding section, second winding section and the 3rd winding section that can supply coil to twine is arranged;

Group unshakable in one's determination has first core part and second core part, and its hollow bulb that is installed in drum stand respectively is with outside, to constitute main magnetic circuit;

Primary side magnetizing coil winding independently is around in first winding section and the 3rd winding section at these its two ends of drum stand respectively, and secondary side induction coil winding is around in second winding section between this two primary sides magnetizing coil winding, after the primary side magnetizing coil winding at these drum stand two ends and secondary side induction coil winding are intercoupled, advance the output that to stablize this transformer two ends induced voltage more, when driving a cold-cathode tube (CCFL) or driving cold-cathode tube (CCFL) more than two simultaneously, make the stability and the reliability that improve its luminous efficiency, mode obtains more uniform back light thus.

Technical solutions according to the invention compared with prior art have following advantage:

1, can promote the cold-cathode tube of two or two above U types, L type or I types simultaneously.

2, the trend that can increase day by day in response to the LCD panel size.

3, the output of tool stabilizing transformer two ends induced voltage.

4, can get rid of lamp tube ends brightness disproportionation phenomenon.

5, can improve the stability and the reliability of lamp luminescence efficient.

Description of drawings

Fig. 1 is for looking decomposing schematic representation on the general converter transformer.

Fig. 2 is the side-looking decomposing schematic representation of general converter transformer.

Fig. 3 is an overall structure decomposing schematic representation of the present invention.

Fig. 4 establishes and the principle illustrative view for of the present invention group.

Fig. 5 is the first Application Example schematic diagram of the present invention.

Fig. 6 is the second Application Example schematic diagram of the present invention.

Fig. 7 is the 3rd an Application Example schematic diagram of the present invention.

Fig. 8 is the drum stand embodiment schematic diagram that is applied to uprightly place pattern of the present invention.The figure number explanation

1... drum stand 11... separation trough

12... secondary side winding region 13... primary side winding region

14.. first 15... second iron core unshakable in one's determination

2... drum stand 21... hollow bulb

22... the first winding section 23..., second winding section

24... the 3rd winding section 25... lead terminal

26... the 4th winding section 3... group unshakable in one's determination

31... the first core part 32..., second core part

4... transformer 5... primary side magnetizing coil winding

6... secondary side induction coil winding 7... drum stand

A... window A ', B ' wind the line ... coupling phenomenon

Embodiment

The invention provides a kind of transformer of converter, (seeing also shown in Figure 3), it comprises drum stand 2 and group 3 unshakable in one's determination, wherein, this drum stand 2 has a hollow bulb 21, and distinguish in its lateral margin first winding section 22, second winding section 23 and the 3rd winding section 24 that can twine for coil arranged, and be provided with a plurality of lead terminals 25 in these drum stand 2 two ends, to be connected with external circuit;

This iron core group 3 has first core part 31 and second core part 32, and its hollow bulb 21 that is mounted on drum stand 2 respectively is with outside, and advancing can be through mutually combining to coat this drum stand 2, to constitute main magnetic circuit;

By above-mentioned structure (seeing also shown in Figure 4), primary side magnetizing coil winding 5 independently can be around in first winding section 22 and the 3rd winding section 24 at these drum stand 2 its two ends respectively, and secondary side induction coil winding 6 is around in second winding section 23 of 5 of this two primary sides magnetizing coil windings, and around the drum stand 2 after twining, the magnetic conduction subassembly (figure do not show) of can arranging in pairs or groups again, produce with the phenomenon that intercepts electromagnetic interference, make the primary side magnetizing coil winding 5 at these drum stand 2 two ends intercouple the back (as A ' with secondary side induction coil winding 6, shown in the B '), advance to stablize the output of these transformer 4 two ends induced voltages, to get rid of the phenomenon of brightness disproportionation, tool improves the stability and the reliability of its luminous efficiency;

See also shown in Figure 5, be the embodiments of the invention schematic diagram, wherein, this drum stand 2 has additional one or more second identical winding sections 23 again in second winding section 23, when using for the user, can be according to the size and the pattern of bearing power, allocate the winding number of required secondary side induction coil winding 6, advance to reach the output of stablizing drum stand 2 two ends induced voltages more, to promote the scope of its overall applicability;

See also shown in Figure 6, be the another embodiment of the present invention schematic diagram, wherein, this drum stand 2 can be established by two or more collocation groups, and has extended a lead terminal 25 between each winding section, reaches to form the transformer 4 that a tool is organized induced voltage output more, advance to reach the effect that promotes two or two above cold-cathode tubes (CCFL) simultaneously, can be for the user according to the quantity of bearing power, allotment group is at any time established the quantity of this drum stand 2, advances to reach to increase the scope that this transformer 4 is used;

Please consult shown in Figure 7 again, be the another embodiment of the present invention schematic diagram, wherein, 24 of this drum stands 2 in first winding section 22 and the 3rd winding section, having additional one or more again can be for the 4th winding section 26 of primary side magnetizing coil winding 5 windings, and in 5 of this two primary sides magnetizing coil windings, being provided with relatively can be for second winding section 23 of secondary side induction coil winding 6 windings, and also can between each winding section, extend a lead terminal 25 (as shown in Figure 6), after primary side magnetizing coil winding 5 on this drum stand 2 is intercoupled with secondary side induction coil winding 6, advance to produce many group coupling circuits, organize the transformer 4 of induced voltage output to form a tool more, can reach the effect that promotes two or two above cold-cathode tubes (CCFL) simultaneously, advance to reach the scope that this transformer 4 of further increase is used;

(see also shown in Figure 8) in sum, the present invention also can further be applied to uprightly place the drum stand 7 of pattern, after can intercoupling with secondary side induction coil winding 6 by the primary side magnetizing coil winding 5 at two ends equally, advance to stablize the induced voltage output of its transformer (figure does not show), to get rid of the phenomenon of brightness disproportionation, make the stability and the reliability that improve its luminous efficiency, also can establish two or more upright drum stands of placing 7 simultaneously by above-mentioned collocation group, reach 5 of this two primary sides magnetizing coil windings, set up one or more primary side magnetizing coil windings 5 or secondary side induction coil winding 6 (figure does not show) again, advance to reach quantity and size with bearing power, the allotment group is established the quantity and the pattern of this drum stand 2, can increase the scope that this transformer 4 is used.

Claims

1, a kind of transformer of converter is characterized in that, comprises:

Group unshakable in one's determination has first core part and second core part;

Drum stand, has a hollow bulb, and be distinguished into first winding section, second winding section and the 3rd winding section of twining at lateral margin for coil, this hollow bulb in order to hold first core part and with the combination of second core part, and the primary side magnetizing coil is wound in first winding section and the 3rd winding section, the secondary side induction coil is wound in second winding section.

2, the transformer of converter as claimed in claim 1 is characterized in that, this drum stand collocation group is established two or more.

3, the transformer of converter as claimed in claim 1, it is characterized in that this drum stand has additional one or more second identical winding sections again in second winding section, according to the size and the pattern of bearing power, the winding number of allotment secondary side induction coil winding.

4, the transformer of converter as claimed in claim 1, it is characterized in that, this drum stand is between first winding section and the 3rd winding section, have additional one or more the 4th winding sections again for the winding of primary side magnetizing coil winding, and between these two primary side magnetizing coil windings, be provided with second winding section relatively for the winding of secondary side induction coil winding.

5, the transformer of converter as claimed in claim 1 is characterized in that, this drum stand further uses two or more upright drum stands of placing pattern.

6, the transformer of converter as claimed in claim 1 is characterized in that, the collocation group is established a magnetic conduction subassembly around this drum stand, produces with the phenomenon that intercepts electromagnetic interference.