CN101140381B - Backlight module, liquid crystal display device and lamp clamping component - Google Patents

Abstract

A backlight module includes an inverter circuit board, a back frame, a plurality of lamp tubes, and a plurality of lamp tube clamping elements. The inverter circuit board has a plurality of embedded terminals. The back frame is disposed on the inverter circuit board. The lamp tubes are disposed on the back frame, and each lamp tube has at least one electrode terminal. The lamp tube clamping elements are embedded in the back frame, and each lamp tube clamping element has a terminal embedding portion. The embedded terminals are correspondingly embedded in the terminal embedding portion and electrically connected thereto, and the electrode terminals are correspondingly electrically connected to the lamp tube clamping elements. Based on the above, the backlight module proposed by the present invention is easy to assemble.

Description

Backlight module, liquid crystal display device and lamp clamping component

field of invention

The invention relates to a backlight module, a display device and a clamping component, and in particular to an easy-to-assemble backlight module, a liquid crystal display device and a lamp tube clamping component.

Background technique

With the development of the industry, digital tools such as mobile phones, digital cameras, digital video cameras, notebook computers (notebooks) and desktop computers are all moving towards more convenient, multi-functional and beautiful direction development. When using these information products, the display screen is an indispensable human-machine communication interface, and the display screen of the above-mentioned products will bring more convenience to the user's operation. Among them, liquid crystal display devices have become the mainstream of display screens. However, since the liquid crystal display panel of the liquid crystal display device cannot emit light, a backlight module must be provided under the liquid crystal display panel to provide a light source to achieve the display function.

FIG. 1 shows a schematic diagram of a lamp tube and a connector used in a known backlight module. Referring to FIG. 1 , in the manufacturing process of the known backlight module, a plurality of U-shaped lamp tubes 110 and a plurality of connectors 130 pre-connected with a plurality of wires 120 are firstly provided. Next, on the two electrode terminals 112 of each U-shaped lamp tube 110 , wires 120 are respectively used to form round hooks 120 a to cover the electrode terminals 112 . After the electrode terminal 112 and the wire 120 of the U-shaped lamp tube 110 are temporarily socketed through the circular hook 120a, welding is performed at the position of the circular hook 120a, so that the wire 120 and the electrode terminal 112 can be firmly connected. In this way, the U-shaped light tube 110 can be connected to an inverter circuit board (not shown) through the connector 130 . The inverter circuit board provides AC power with a specific frequency to drive the U-shaped light tube 110 to make the U-shaped light tube 110 emit light.

However, using welding to connect the U-shaped lamp tube 110 and the wiring 120 not only requires more assembly man-hours, but also tends to cause poor welding during the welding process, which reduces the good rate of the product, thus increasing known The production cost of the backlight module. In addition, because the U-shaped light tube 110 must be connected to the inverter circuit board through the wire 120 and the connector 130 , the wire 120 and the connector 130 will occupy space and increase the cost, and the size of the known backlight module cannot be reduced.

Contents of the invention

In view of this, the purpose of the present invention is to provide an easy-to-assemble backlight module.

Another object of the present invention is to provide a liquid crystal display device with shorter assembly time and lower cost.

Another object of the present invention is to provide a light tube clamping element that facilitates the assembly of the backlight module.

Based on the above purpose and other purposes, the present invention proposes a backlight module, comprising: an inverter circuit board with a plurality of embedded terminals; a back frame configured on the inverter circuit board; a plurality of lamp tubes, It is arranged on the back frame, and each lamp tube has at least one electrode terminal; and a plurality of lamp tube clamping elements are embedded in the back frame, and each lamp tube clamping element has a terminal embedding part and The clamping part of the lamp tube, wherein each terminal embedded part has an anti-falling piece and two guide grooves on both sides, and the embedded terminal is suitable for pushing away the anti-falling piece and sliding into the guiding groove between them, and are embedded between the guide grooves through the force exerted by the anti-falling piece on the embedded terminal; each clamping part of the lamp tube includes a pair of elastic pieces, one of the elastic pieces One end is structurally connected to one end of the other shrapnel, and the shrapnel forms a V-shaped opening and a clamping space at the end of the V-shaped opening, and the electrode terminal of the lamp tube is slid by the V-shaped opening. insert, and push away the elastic piece to be stuck in the locking space, the elastic piece is electrically connected to the terminal embedding part, and the embedded terminal is correspondingly embedded in the terminal embedding part, so The embedded terminal is electrically connected to the electrode terminal through the anti-falling piece and the elastic piece.

According to the backlight module described in the preferred embodiment of the present invention, wherein the embedded terminals include planar terminals.

The backlight module according to the preferred embodiment of the present invention, for example, further includes a plurality of fixing seats, which are embedded in the back frame, wherein the lamp tube clamping elements are respectively fixed in the fixing seats.

According to the backlight module described in the preferred embodiment of the present invention, the lamp is, for example, a cold cathode fluorescent lamp (CCFL).

According to the backlight module described in the preferred embodiment of the present invention, the light tube is, for example, a straight light tube or a U-shaped light tube.

The present invention further provides a liquid crystal display device, which includes the above-mentioned backlight module and a liquid crystal display panel disposed on the backlight module.

The present invention also proposes a lamp tube clamping component for electrically connecting between the electrode terminal of the lamp tube and the embedded terminal of the inverter circuit board, the lamp tube clamping component has a lamp tube clamping portion and The terminal embedding part, the lamp tube clamping part is used to clamp the electrode terminal, the lamp tube clamping part includes a pair of elastic pieces, one end of one of the elastic pieces is structurally connected to one end of the other elastic piece , and the shrapnel constitutes a V-shaped opening and a clamping space at the end of the V-shaped opening, the electrode terminal of the lamp is slid into the V-shaped opening, and the shrapnel is pushed away to be locked In the clamping space, the elastic piece is electrically connected to the terminal embedding part; the terminal embedding part has an anti-falling piece and two guide grooves on both sides, and the embedded terminal is suitable for being pushed open The anti-falling piece slides between the guide grooves, and is embedded between the guiding grooves by the force exerted by the anti-falling piece on the embedded terminal, and the embedded The terminal is electrically connected to the electrode terminal through the anti-falling piece and the elastic piece. According to the liquid crystal display device according to the preferred embodiment of the present invention, wherein the embedded terminals include flat-type terminals.

To sum up, the lamp clamping component proposed by the present invention is easy to assemble with the embedded terminals of the inverter circuit board and the electrode terminals of the lamp. Using the lamp tube clamping element as the assembly component of the backlight module can make the backlight module easier to assemble, thereby achieving the purpose of shortening assembly man-hours and reducing production costs. In addition, the above-mentioned backlight module can also be applied to a liquid crystal display device, which shortens the assembly time of the liquid crystal display device and reduces its production cost.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are specifically listed below and described in detail below with accompanying drawings.

Description of drawings

FIG. 1 shows a schematic diagram of a lamp tube and a connector used in a known backlight module;

FIG. 2A illustrates a schematic structural view of a backlight module in a preferred embodiment of the present invention;

Figure 2B illustrates a magnified view of the area labeled S10 in Figure 2A;

Figure 2C illustrates a schematic cross-sectional view of the backlight module of Figure 2A along the section line A-A';

Figure 2D illustrates a schematic cross-sectional view of the backlight module of Figure 2A along the section line B-B';

FIG. 2E illustrates a schematic structural view of a liquid crystal display device made using the backlight module of FIG. 2A;

FIG. 3 illustrates a schematic structural diagram of a backlight module according to another embodiment of the present invention.

【Description of main component symbols】

110: U-shaped lamp

112: electrode terminal

120: Wiring

120a: round hook

130: connector

200, 500: backlight module

210, 510: Inverter circuit board

212, 512: Embedded terminals

220: back frame

230, 530: light tube

232: electrode terminal

240: lamp clamping element

242: Terminal fitting part

242a: anti-shedding sheet

242b: guide groove

244: lamp clamping part

244a, 244b: shrapnel

244c: V-shaped opening

244d: card placement space

250: fixed seat

260: Lamp Fixing Clip

300: LCD display panel

400: liquid crystal display device

S10: Area

Detailed ways

FIG. 2A illustrates a schematic structural diagram of a backlight module in a preferred embodiment of the present invention. FIG. 2B illustrates an enlarged view of area S10 in FIG. 2A. Referring to FIG. 2A and FIG. 2B simultaneously, the backlight module 200 of this embodiment includes an inverter circuit board 210 , a back frame 220 , a plurality of lamp tubes 230 and a plurality of lamp tube clamping components 240 . Wherein, the inverter circuit board 210 has a plurality of embedded terminals 212 , and these embedded terminals 212 are, for example, planar terminals. The back frame 220 is disposed on the inverter circuit board 210 . The lamp tube 230 is disposed on the back frame 220 and is, for example, a CCFL tube or other suitable lamp tubes. Each lamp tube 230 has at least one electrode terminal 232 . The lamp tube clamping element 240 is set in the back frame 220, that is, the lamp tube clamping element 240 penetrates the back frame 220, so that a part of the lamp tube clamping element 240 is located on the back frame 220, and a part is located on the back frame 220. Below the back frame 220. Each lamp clamping element 240 has a terminal embedding portion 242 , so that the embedded terminal 212 of the inverter circuit board 210 can be correspondingly embedded into the terminal embedding portion 242 . In other words, each embedded terminal 212 is respectively embedded in the terminal embedded portion 242 above the embedded terminal 212 and electrically connected thereto. In addition, each electrode terminal 232 of the lamp tube 230 corresponds to and is electrically connected to the lamp clamping components 240 , that is, each electrode terminal 232 is electrically connected to the lamp clamping component 240 located below the electrode terminal 232 .

A more detailed description is as follows. In this embodiment, the terminal insertion part 242 of the lamp clamping element 240 has an anti-falling piece 242a and two guide grooves 242b on both sides. These terminal insertion parts 242 are suitable for respectively inserting corresponding The embedded terminal 212. When the embedded terminal 212 is inserted from the bottom of the corresponding terminal insertion part 242, the embedded terminal 212 will slide along the two guide grooves 242b and push away the anti-falling piece 242a, and the spring-shaped anti-falling piece 242a will The elastic force is applied to the embedded terminal 212 , and the frictional force caused by the positive force can make the embedded terminal 212 firmly embedded in the terminal embedded portion 242 .

In addition, each lamp clamping element 240 also has a lamp clamping portion 244 for clamping and electrically connecting the electrode terminal 232 of the lamp 230 . Each lamp clamping portion 244 includes a pair of elastic pieces 244a, 244b, one end of the elastic piece 244a is structurally connected with one end of the elastic piece 244b, and the elastic piece 244a and the elastic piece 244b form a V-shaped opening 244c and the V-shaped opening 244c The locking space 244d at the end. When assembling the lamp tube 230 of the backlight module 200, the electrode terminal 232 of the lamp tube 230 can be directly slid in through the V-shaped opening 244c of the lamp clamping element 240, so that the electrode terminal 232 pushes away the elastic piece 244a and the elastic piece 244b to be locked. in the locking space 244d. Since the lamp clamping portion 244 is electrically connected to the terminal embedding portion 242 , the elastic pieces 244 a, 244 b are also electrically connected to the terminal embedding portion 242 . After the embedded terminal 212 of the inverter circuit board 210 is firmly embedded in the terminal embedded part 242, and the electrode terminal 232 of the lamp tube 230 is embedded in the V-shaped opening 244c, the electrode terminal 232 of the lamp tube 230 can pass through the shrapnel 244a, 244 b is electrically connected to the embedded terminal 212 of the inverter circuit board 210 , so that the lamp 230 is electrically connected to the inverter circuit board 210 .

FIG. 2C illustrates a schematic cross-sectional view of the backlight module in FIG. 2A along the section line A-A'. Referring to FIG. 2C , as shown in FIG. 2C , the embedded terminals 212 on the inverter circuit board 210 are correspondingly embedded in the terminal embedded portions 242 of each lamp clamping element 240 in the above-mentioned manner. Thus, the inverter circuit board 210 can be electrically connected to the lamp tube 230 through the lamp tube clamping component 240 .

Based on the above, in order to fix the lamp clamping element 240 , the backlight module 200 further includes a plurality of fixing seats 250 (as shown in FIG. 2B and FIG. 2C ). The fixing seats 250 are embedded in the back frame 220 , that is, the fixing seats 250 penetrate the back frame 220 , so that a part of the fixing seats 250 is located on the back frame 220 , and a part is located on the bottom of the back frame 220 . The lamp clamping elements 240 are fixed in these fixing seats 250 . The fixing seat 250 can not only fix each lamp tube clamping component 240 , but also can electrically insulate each lamp tube clamping component 240 .

FIG. 2D illustrates a schematic cross-sectional view of the backlight module in FIG. 2A along the section line B-B'. Referring to FIG. 2D , in this embodiment, the lamp tube 230 is a U-shaped lamp tube. In order to fix the lamp tube 230 , the backlight module 200 further includes a plurality of lamp tube fixing clips 260 disposed on the back frame 220 to respectively clamp the U-shaped bending parts of the lamp tube 230 . However, the lamp tube 230 is not limited to a U-shaped lamp tube, and may also be other types of lamp tubes, such as linear lamp tubes.

It is worth noting that, in the process of assembling the backlight module 200 of this embodiment, it is only necessary to snap the electrode terminal 232 of the lamp tube 230 into the clamping space 244d of the lamp tube clamping portion 244, and insert the embedded terminal 212 into the terminal The embedded portion 242 is to electrically connect the electrode terminal 232 of the lamp tube 230 to the embedded terminal 212 of the inverter circuit board 210 through the lamp clamping component 240 . In other words, the backlight module 200 of this embodiment is easy to assemble, so the assembly man-hours can be shortened, and no welding method is used in the assembly process of the backlight module 200, so there is no problem of poor welding. In addition, the lamp clamping element 240 replaces the wires and connectors in the prior art, which not only saves the material cost of the wires and connectors, but also reduces the volume of the backlight module 200 .

FIG. 2E illustrates a schematic structural view of a liquid crystal display device fabricated by using the backlight module of FIG. 2A . Referring to FIG. 2E , the backlight module 200 of this embodiment can be applied to the liquid crystal display device 400 to shorten the overall assembly man-hours of the liquid crystal display device 400 and reduce its production cost. The liquid crystal display device 400 includes the aforementioned backlight module 200 and the liquid crystal display panel 300 . The liquid crystal display panel 300 is disposed on the backlight module 200 , and the liquid crystal display panel 300 may be a transmissive liquid crystal display panel or a transflective liquid crystal display panel or the like.

It is worth mentioning that in this embodiment, the lamp clamping element 240 is used as a component of the backlight module 200, and the lamp clamping element 240 is used to clamp the electrode terminal 232 of the lamp tube 230 and fit the inverter Embedded terminals 212 of the circuit board 210 . However, the lamp clamping element 240 is not limited to clamping the electrode terminal 232 or embedded in the embedded terminal 212 . The light tube holding element 240 can also be used for other purposes. For example, the lamp clamping element 240 can be used in products such as mobile phones or computer motherboards, so as to electrically connect terminals of different components. The advantage of using the lamp clamping element 240 is that in the manufacturing process of these products, there is no need to electrically connect circuits of different components by soldering. It is therefore possible to reduce production costs and shorten the manufacturing time of products. In addition, the principle of the lamp tube clamping element 240 clamping the assembly components is not limited to the above-mentioned embodiments, and other mechanical principles may also be used, as long as it can be implemented and electrically connected to different assembly components.

FIG. 3 illustrates a schematic structural diagram of a backlight module according to another embodiment of the present invention. Please refer to FIG. 3 , the backlight module 500 of this embodiment is similar to the backlight module 200 of the above embodiment, the difference is that the light tube 530 of the backlight module 500 is a linear light tube. A plurality of lamp clamping components 240 are embedded near two opposite ends of the bottom plate of the back frame 220 so that the lamp clamping portion 244 can clamp the electrode terminals at both ends of the lamp 530 . In addition, in order to cooperate with the lamp tube clamping component 240 to be set near the opposite ends of the bottom plate of the back frame 220, a plurality of embedded terminals 512 of the inverter circuit board 510 are arranged on the opposite side corresponding to the lamp tube clamping component 240. The phase circuit board 510 faces one side of the back frame so that the embedded terminals 512 can be respectively embedded into the terminal embedded portion 242 of the lamp clamping component 240 .

It should be noted that the backlight module 500 also has the same advantages as the backlight module 200 because it uses the lamp clamping element 240 as an assembly component. The backlight module 500 can also be applied in a liquid crystal display device (not shown), so as to shorten the overall assembly man-hour of the liquid crystal display device and reduce its production cost.

To sum up, the backlight module, liquid crystal display device and lamp clamping element of the present invention have at least the following advantages:

1. The lamp tube clamping element proposed by the present invention is easy to assemble with the embedded terminal of the inverter circuit board and the electrode terminal of the lamp tube. When used as an assembly member of the backlight module, it can shorten the assembly man-hour of the backlight module and reduce the The purpose of the cost of its production. In addition, the lamp clamping element can also be used for other purposes, so that the terminals of different components can be electrically connected without or omitting soldering.

2. In the process of assembling the backlight module of the present invention, it is only necessary to snap the lamp tube into the clamping space of the lamp tube clamping part, and embed the embedded terminal into the terminal embedded part, so that the lamp tube can pass through the lamp tube clamp The holding element is electrically connected with the inverter circuit board. Therefore, the backlight module of the present invention is easy to assemble, and the assembly man-hours can be shortened, and no welding method is used in the assembly process of the backlight module, so there is no problem of poor welding. In addition, the lamp clamping element replaces the wires and connectors in the prior art, which not only saves the material cost of the wires and connectors, but also reduces the size of the backlight module.

3. The backlight module of the present invention can be used to manufacture liquid crystal display devices, shortening the assembly man-hours of the liquid crystal display devices and reducing the production cost.

Although the present invention has been described using the above preferred embodiments, they are not intended to limit the present invention. Those skilled in the art can make appropriate modifications and changes without departing from the spirit and scope of the present invention. Therefore, the present invention The protection scope of the invention should be determined by the contents of the appended claims.

Claims (11)

1. A backlight module, comprising: Inverter circuit board with multiple embedded terminals; a back frame configured on the inverter circuit board; A plurality of lamp tubes are arranged on the back frame, and each lamp tube has at least one electrode terminal; and A plurality of lamp tube clamping components are embedded in the back frame, and each lamp tube clamping component has a terminal embedding part and a lamp tube clamping part, wherein each terminal embedding part has an anti-falling piece and two sides Two guide grooves, the embedded terminal is suitable for pushing away the anti-falling piece and sliding between the guiding grooves, and embedded by the force exerted by the anti-falling piece on the embedded terminal Placed between the guide grooves, each clamping portion of the lamp tube includes a pair of elastic pieces, one end of one of the elastic pieces is structurally connected to one end of the other elastic piece, and the elastic pieces form a V-shaped opening and The clamping space located at the end of the V-shaped opening, the electrode terminal of the lamp tube is slid into the V-shaped opening, and the shrapnel is pushed away to be clamped in the clamping space. The elastic piece is electrically connected to the terminal embedding part, and the embedded terminal is correspondingly embedded in the terminal embedding part, and the embedded terminal is electrically connected to the electrode terminal through the anti-falling piece, the elastic piece connect. 2. The backlight module of claim 1, wherein the embedded terminal comprises a flat-type terminal. 3 . The backlight module according to claim 1 , further comprising a plurality of fixing seats embedded in the back frame, wherein the lamp clamping element is fixed in the fixing seats. 4 . 4. The backlight module according to claim 1, wherein the light tube comprises a cold cathode fluorescent lamp (cold cathode fluorescent lamp, CCFL). 5. The backlight module according to claim 1, wherein the light tube comprises a straight light tube or a U-shaped light tube. 6. A liquid crystal display device, comprising: Backlight module, including: Inverter circuit board with multiple embedded terminals; a back frame configured on the inverter circuit board; A plurality of lamp tubes are arranged on the back frame, and each lamp tube has at least one electrode terminal; and A plurality of lamp tube clamping components are embedded in the back frame, and each lamp tube clamping component has a terminal embedding part and a lamp tube clamping part, wherein each terminal embedding part has an anti-falling piece and two sides Two guide grooves, the embedded terminal is suitable for pushing away the anti-falling piece and sliding between the guiding grooves, and embedded by the force exerted by the anti-falling piece on the embedded terminal Placed between the guide grooves, each clamping portion of the lamp tube includes a pair of elastic pieces, one end of one of the elastic pieces is structurally connected to one end of the other elastic piece, and the elastic pieces form a V-shaped opening and The clamping space located at the end of the V-shaped opening, the electrode terminal of the lamp tube is slid into the V-shaped opening, and the shrapnel is pushed away to be clamped in the clamping space. The elastic piece is electrically connected to the terminal embedding part, and the embedded terminal is correspondingly embedded in the terminal embedding part, and the embedded terminal is electrically connected to the electrode terminal through the anti-falling piece, the elastic piece connection; and The liquid crystal display panel is configured on the backlight module. 7. The liquid crystal display device of claim 6, wherein the embedded terminal comprises a flat-type terminal. 8. The liquid crystal display device according to claim 6, wherein the backlight module further comprises a plurality of fixing seats embedded in the back frame, wherein the lamp clamping element is fixed in the fixing seats . 9. The liquid crystal display device according to claim 6, wherein the light tube comprises a CCFL tube. 10. The liquid crystal display device according to claim 6, wherein the light tube comprises a linear light tube or a U-shaped light tube. 11. A lamp tube clamping component, used to electrically connect between the electrode terminal of the lamp tube and the embedded terminal of the inverter circuit board, the lamp tube clamping component has a lamp tube clamping part and a terminal embedded part, the lamp clamping part is used to clamp the electrode terminal, the lamp clamping part includes a pair of elastic pieces, one end of one of the elastic pieces is structurally connected with one end of the other elastic piece, and The shrapnel constitutes a V-shaped opening and a clamping space at the end of the V-shaped opening. The electrode terminal of the lamp is slid into the V-shaped opening, and the shrapnel is pushed away to be locked in the place. In the clamping space, the elastic piece is electrically connected to the terminal embedding part, the terminal embedding part has an anti-falling piece and two guide grooves on both sides, and the embedded terminal is suitable for pushing the The anti-falling sheet slides between the guide grooves, and is embedded between the guiding grooves by the force exerted by the anti-falling sheet on the embedded terminal, and the embedded terminal passes through The falling-off prevention sheet and the elastic sheet are electrically connected to the electrode terminals.

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