CN100378535C - Fixed plastic frame group and backlight module - Google Patents

Abstract

The invention discloses a fixed plastic frame group, which is suitable for carrying at least one lamp tube, and one end of the lamp tube is connected with a power line. The fixed plastic frame group is mainly composed of a lower fixed rubber frame and an upper fixed rubber frame. Wherein, the lamp tube is arranged between the upper fixed rubber frame and the lower fixed rubber frame, and the lower fixed rubber frame has a corner cable management groove, and the power cord is arranged in the corner wire management groove, and the end of the power cable is exposed to the lower fixed rubber frame. The outside of the frame, while the upper fixed rubber frame is configured on the lower fixed rubber frame. With the design of the corner cable management groove, the position of the power cord can be effectively fixed to prevent the power cord from being displaced and solder joints loosened due to improper external force. In addition, the present invention also proposes a backlight module, which is mainly composed of a light guide plate, the above-mentioned lamp tube and a fixed plastic frame group.

Description

Fixed plastic frame group and backlight module

technical field

The invention relates to a fixed plastic frame group and a backlight module, in particular to a fixed plastic frame group capable of effectively fixing a power line of a lamp tube to prevent solder joints from loosening and a backlight module using the fixed plastic frame group.

Background technique

The rapid progress of the multimedia society is mostly due to the rapid progress of semiconductor components or man-machine display devices. As far as displays are concerned, cathode ray tubes (CRTs) have been monopolizing the display market in recent years because of their excellent display quality and economical efficiency. However, for the environment where individuals operate most terminals/display devices on the table, or from the perspective of environmental protection, if the trend of energy saving is predicted, cathode ray tubes still have many problems in terms of space utilization and energy consumption, and There is no effective solution to the demands of lightness, thinness, shortness, smallness and low power consumption. Therefore, liquid crystal displays (LCDs) with superior characteristics such as high image quality, high space utilization efficiency, low power consumption, and no radiation have gradually become the mainstream of the market.

FIG. 1 shows a schematic structural diagram of a known backlight module. 1, the backlight module 100 consists of a light guide panel (Light Guide Panel, LGP) 110, a lamp (Lamp) 120, a reflector (Holder) 130, an optical film (Opticalfilm) 140 and a fixed The plastic frame group 200 constitutes. Wherein, the light guide plate 110 has a light incident surface 112 , a light diffusing surface 114 and a light emitting surface 116 . The light tube 120 is arranged beside the light incident surface 112 of the light guide plate 110, and the light provided by the light tube 120 can enter the light guide plate 110 from the light incident surface 112 of the light guide plate 110 and pass through the light diffusion surface 114 of the light guide plate 110 After scattering and reflection, the light exits from the light exit surface 116. It can be seen from the above that the light guide plate 110 can convert the linear light emitted by the lamp tube 120 into a surface light source, so as to ensure that the liquid crystal panel (not shown in the figure) obtains light with uniform brightness.

As shown in FIG. 1 , the reflector 130 is disposed beside the lamp tube 120 and covers the lamp tube 120 for concentrating the light emitted by the lamp tube 120 toward the light incident surface 112 of the light guide plate 110 . The optical film 140 is disposed on the light emitting surface 116 of the light guide plate 110 to improve the luminance of the backlight module 100 .

As shown in FIG. 1 , the fixed plastic frame group 200 is mainly composed of an upper fixed plastic frame (upper frame) 210 and a lower fixed plastic frame (bottom frame) 220 . Wherein, the lower fixed plastic frame 220 is used to carry the light guide plate 110, the lamp tube 120 and the reflector 130, and the side wall 222 of the lower fixed plastic frame 220 has a plurality of protrusions 224, and the upper fixed plastic frame 210 has a plurality of The fastening piece 212 corresponds to the above-mentioned protrusion 224, and the fastening piece 212 has an opening 214, and this opening 214 is suitable for fastening on the above-mentioned protrusion 224, so that the upper fixed rubber frame 210 and the lower fixed rubber frame 220 fixed to each other. In addition, the upper fixing plastic frame 210 has a window 216 for exposing the light exit surface 116 of the light guide plate 110, so that the surface light source emitted from the light exit surface 116 can be irradiated to the liquid crystal panel ( not shown in the figure). Therefore, it can be known from the above that the light guide plate 110 , the lamp tube 120 and the reflector 130 are fixed by the combination of the upper fixing plastic frame 210 and the lower fixing rubber frame 220 , so that the backlight module 100 is integrated.

2A-2B show schematic diagrams of outlet terminals of a known backlight module. Please refer to FIGS. 2A-2B together. One end of the lamp tube 120 disposed in the lower fixing plastic frame 220 is usually connected to a power line 122 by welding, and the power line 122 is led out of the backlight module 100. And a bias voltage is coupled through the power line to drive the lamp tube 120 to emit light. In addition, one side of the lower fixed rubber frame 220 usually has a fixed rubber seat 226, and a cable management slot 228 is arranged on the fixed rubber seat 226, and its power cord 122 is arranged in the cable management slot 228, and the power cord 122 The end of is exposed on the outside of the lower fixing rubber frame 220 . In addition, the upper fixing rubber frame 210 has a cover plate 218 , and the cover plate 218 can be covered on the fixing rubber seat 226 after being interlocked with the above-mentioned engaging piece 212 and the protrusion 224 . It should be noted that, since the known cable management groove 228 is designed as a linear groove, it is easy to derive the following disadvantages:

1. Since the cable management groove of the lower fixed plastic frame is designed as a straight channel, the power cord arranged in this channel is easy to slide along the axis of the lamp tube, which causes the power cord to shift, and its fixing effect is not good.

2. Since the cable management groove of the lower fixed plastic frame is designed as a straight groove, when testing or assembling, the power cord is often subjected to improper external force, and the external force acts directly on the welding point where the power cord and the lamp tube are connected. In this way, it is easy to cause loosening or exposure of the soldering point, resulting in electric leakage, and even the excessive pulling force may cause the soldering point to break and cause the lamp tube to fail to operate normally.

Contents of the invention

Therefore, the object of the present invention is to provide a fixed plastic frame group and a backlight module, which can effectively fix the position of the power cord, so as to prevent the power cord from being displaced due to improper external force, causing the power cord to shift, solder joints to loosen or be exposed, etc. Phenomenon.

The invention proposes a fixed plastic frame, which is suitable for carrying at least one lamp tube, and one end of the lamp tube is connected to a power line. The fixed plastic frame group is mainly composed of a lower fixed plastic frame and an upper fixed plastic frame. Wherein, the lower fixed plastic frame has a corner wire management groove including at least one corner, the power cord is disposed in the corner wire management groove, and the corner wire management groove is located at the end of the power wire and exposed to the outside of the lower fixed plastic frame position, and the upper fixed rubber frame is configured on the lower fixed rubber frame.

The present invention further proposes a backlight module, which is mainly composed of a light guide plate, at least one lamp tube and a fixed plastic frame group. Wherein, the light guide plate has at least one light incident surface, at least one light diffusion surface and a light exit surface; one end of the lamp tube is connected to a power line, and the lamp tube is arranged beside the light incident surface, and the light provided by the lamp tube can The light enters the light guide plate from the incident surface, passes through the light diffusion surface, and transmits to the light exit surface to exit; the fixed plastic frame group is mainly composed of a lower fixed plastic frame and an upper fixed plastic frame. Wherein, the lower fixed plastic frame has a corner wire management groove including at least one corner, the power cord is disposed in the corner wire management groove, and the corner wire management groove is located at the end of the power wire and exposed to the outside of the lower fixed plastic frame position, and the upper fixing rubber frame is arranged on the lower fixing rubber frame, and the upper fixing rubber frame has a window for exposing the light exiting surface of the light guide plate.

According to a preferred embodiment of the present invention, the above-mentioned lower fixed rubber frame has a fixed rubber seat, and the corner cable management groove is located on the fixed rubber seat, and the upper fixed rubber frame has a cover plate, and the cover plate is arranged on the Fixed on the glue base. In addition, the corner cable management trough has one or more corners, such as right angles, acute angles or obtuse angles. In addition, there are multiple limiting protrusions in the corner cable management slot to limit the displacement of the power cord.

According to a preferred embodiment of the present invention, the side wall of the lower fixed rubber frame also has a plurality of protrusions, and the upper fixed rubber frame also has a plurality of fastening pieces corresponding to these protrusions, and each fastening piece has a Each has an opening, and the opening is suitable for buckling on the protrusion, so that the upper fixing rubber frame and the lower fixing rubber frame are fixed to each other. In addition, each convex block also has a guiding slope for guiding the fastening piece to move on the convex block, so that when the fastening piece is fastened, the opening on the fastening piece is more easily fastened to the convex block.

According to a preferred embodiment of the present invention, an optical film is further arranged on the light exit surface of the light guide plate to improve the luminance of the backlight module. In addition, a reflector is arranged beside the above-mentioned lamp tube, and the reflector covers the lamp tube to concentrate the light emitted by the lamp tube toward the light incident surface of the light guide plate. In addition, the bottom of the light guide plate is further equipped with a reflective sheet, which is used to enhance the reflection and diffusion effect of the light diffusion surface of the light guide plate, thereby improving the light utilization efficiency of the backlight module.

Because the present invention adopts a corner wire management groove with one or more corners, the power cord connected to the lamp tube is arranged in the corner wire management groove, and the position of the power wire can be fixed by the corner design in the corner wire management groove to avoid The slide of the power cord. In addition, with the design of the corner of the corner cable management slot, when the power cord is subjected to improper external force, the external force can act on the corner to avoid loosening, exposure or breakage of the welding point connecting the power cord and the light tube.

Description of drawings

A preferred embodiment will be described in detail below with reference to the accompanying drawings, so as to make the above and other objects, features, and advantages of the present invention more comprehensible.

Fig. 1 is a schematic view showing the structure of a known backlight module;

2A-2B are schematic diagrams showing the outlet terminals of a known backlight module;

3 is a schematic diagram showing the structure of a backlight module according to a preferred embodiment of the present invention;

4A-4B are schematic diagrams showing the outlet terminals of the backlight module according to a preferred embodiment of the present invention; and

5A-5C are schematic diagrams showing a corner cable management trough according to another preferred embodiment of the present invention.

Detailed ways

FIG. 3 is a schematic structural diagram of a backlight module according to a preferred embodiment of the present invention. Referring to FIG. 3 , the backlight module 300 is mainly composed of a light guide plate 310 , a lamp tube 320 , a reflector 330 , an optical film 340 , a reflector 350 and a fixed plastic frame 400 . Wherein, the light guide plate 310 has a light incident surface 312, a light diffusion surface 314 and a light exit surface 316, and the light diffusion surface 314 has a plurality of V-shaped notches or a plurality of concave points (not shown in the figure) . The lamp tube 320 is, for example, a cold cathode lamp (CCFL), which is arranged beside the light incident surface 312 of the light guide plate 310, and the light provided by the lamp tube 320 can enter the light guide plate 310 from the light incident surface 312 of the light guide plate 310 After being scattered and reflected by the light diffusing surface 314 of the light guide plate 310 , it is emitted from the light emitting surface 316 . Therefore, it can be seen from the above that the light guide plate 310 can convert the linear light emitted by the lamp tube 320 into a surface light source, so as to ensure that the liquid crystal panel (not shown in the figure) obtains light with uniform brightness.

As shown in FIG. 3 , the reflector 330 is disposed beside the lamp tube 320 and covers the lamp tube 320 for concentrating the light emitted by the lamp tube 320 toward the light incident surface 312 of the light guide plate 310 . The optical film 340 is disposed on the light emitting surface 316 of the light guide plate 310 to improve the luminance of the backlight module 300 . The reflective sheet 350 is disposed at the bottom of the light guide plate 310 to improve the reflection and diffusion effect of the light diffusion surface 314 of the light guide plate 310 , thereby improving the light utilization efficiency of the backlight module 300 . Through the arrangement of the reflector 330 , the optical film 340 and the reflector 350 , the surface light source provided by the backlight module 300 is more perfect, so as to meet the luminance requirement of a high-resolution liquid crystal display.

As shown in FIG. 3 , the fixed plastic frame group 400 is used to carry the light guide plate 310 , the lamp tube 320 and the reflector 330 , and is mainly composed of an upper fixed plastic frame 410 and a lower fixed plastic frame 420 . Wherein, the side wall 422 of the lower fixing rubber frame 420 has a plurality of protrusions 424, and the upper fixing rubber frame 410 has a plurality of fastening pieces 412 corresponding to the above-mentioned protrusions 424, and the fastening piece 412 has an opening 414 , the opening 414 is suitable for buckling on the above-mentioned protrusion 424, so that the upper fixing rubber frame 410 and the lower fixing rubber frame 420 are fixed to each other to achieve the purpose of tight fit. In addition, the protruding block 424 has a guiding inclined surface 424a for guiding the fastening piece 412 to move on the guiding inclined surface 424a, so that when the fastening piece 412 is fastened, the opening 414 on the fastening piece 412 is more easily fastened to the On the bump 424 . In addition, the upper fixing plastic frame 410 has a window 416 for exposing the light emitting surface 316 of the light guide plate 310, so that the surface light source emitted from the light emitting surface 316 can be irradiated to the liquid crystal panel ( not shown in the figure) to provide the required light source for the liquid crystal panel.

Therefore, it can be seen from the above that the light guide plate 310, the lamp tube 320, the reflector 330 and other components are fixed by the combination of the upper fixing plastic frame 410 and the lower fixing rubber frame 420, so that the backlight module 300 achieves the purpose of integration. .

4A-4B are schematic diagrams of outlet terminals of a backlight module according to a preferred embodiment of the present invention. Please refer to FIGS. 4A-4B together. One end of the lamp tube 320 arranged in the lower fixing plastic frame 420 is connected to a power line 322 by welding, and the power line 322 is led out of the backlight module 300. And a bias voltage is coupled through the power line 322 to drive the lamp tube 320 to emit light. In addition, one side of the lower fixed rubber frame 420 has a fixed rubber seat 426, and a corner cable management slot 428 is arranged on the fixed rubber seat 426, and its power cord 322 is disposed in the corner cable management slot 428, and the power cord The end of 322 is exposed outside of the lower fixing rubber frame 420 . In addition, the upper fixed rubber frame 410 has a cover plate 418 corresponding to the above-mentioned fixed rubber seat 426, and the cover plate 418 can be covered on the fixed rubber seat 426 after being interlocked with the above-mentioned fastening piece 412 and the protrusion 424. superior.

Please continue to refer to FIG. 4A , the corner cable management trough 428 has two corners (that is, the channel of the corner cable management trough 428 has undergone two turns), the two corners are, for example, right angles, and the power cord 322 is disposed on the corner cable management channel. When inside the slot 428 , the design of the corner of the corner cable management slot 428 can limit the movement of the power cord 322 along the axis of the light tube 320 , thereby fixing the position of the power cord 322 . In addition, a plurality of limiting bumps 428 a can be disposed in the corner cable management slot 428 , and these limiting bumps 428 a can push the power cord 322 to further limit the displacement of the power cord 322 . It is worth noting that, with the design of the corner of the corner cable management slot 428, when the power cord 322 is subjected to an improper external force, the external force can act on this corner instead of directly acting on the connection between the power cord 322 and the lamp tube 320. On the soldering point, this will prevent the soldering point from becoming loose, exposed or broken.

5A-5C are schematic views of a corner cable management trough according to another preferred embodiment of the present invention. Please refer to FIGS. 5A-5C together. The corner cable management groove 428 on the fixed rubber base 426 is not limited to two corners as shown in FIG. 4A, but can be designed as a single corner (as shown in FIG. 5B ), four corners (as shown in FIG. 5C ) and other corners, and a plurality of wire position bumps (not shown in the figure) can also be arranged in these corner wire management grooves 428 .

In addition, the corner cable management slot in this embodiment uses a right angle as an example to describe the corner, but it is not limited to use a right angle, and it can also be designed as an acute angle, an obtuse angle, or other theories that can limit the displacement of the power cord. Troughs can also achieve the same fixing effect.

In addition, the fixed plastic frame group in this embodiment is used in the backlight module to carry the lamp tube, the reflector and the light guide plate, and to fix the power cord of the lamp tube. Of course, those skilled in the art should be able to infer that this The inventive fixed plastic frame group is not limited to be used in the backlight module. The fixed plastic frame group of the present invention can also be used only to carry a light source module composed of one or more lamp tubes, and can achieve the same effect as the power cord for fixing the lamp tubes. Purpose.

To sum up, the fixed plastic frame group and the backlight module of the present invention have at least the following advantages:

1. In the fixed plastic frame group and the backlight module of the present invention, since the corner cable management slot of the lower fixed plastic frame is designed with one or more corners, the power cord arranged in this slot is not easy to slide along the axial direction of the lamp tube , which leads to the displacement of the power cord, and its fixing effect is good.

2. In the fixed plastic frame group and the backlight module of the present invention, since the corner cable management slots of the lower fixed plastic frame are designed with one or more corners, when the power line is subjected to improper external force, the external force directly acts on the corner, and It will not act on the welding point where the power cord and the lamp tube are connected, so that the welding point can be protected.

Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Those skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention is defined in the claims.

Claims (15)

1. a fixing glue frame group is suitable for carrying at least one fluorescent tube, and an end of this fluorescent tube is connected with a power lead, and this fixing glue frame group comprises:

Fixing glue frame once, it has a corner trunking that comprises at least one corner, and this power lead is disposed in this corner trunking, and described corner trunking is positioned at the position of the ends exposed of this power lead in the outside of this time fixing glue frame; And

Fixing glue frame on one, it is disposed on this time fixing glue frame,

The sidewall of this time fixing glue frame also has plurality of bump, also had a plurality of fastening pieces and should go up the fixing glue frame corresponding to these projections, each described projection also has a lead-in chamfered, in order to guide described fastening piece on described projection, to move, so that described fastening piece correspondence is fastened on the described projection.

2. fixing glue frame group as claimed in claim 1 is characterized in that, this time fixing glue frame also has a fixing rubber base, and this corner trunking is positioned at this fixedly on the rubber base.

3. fixing glue frame group as claimed in claim 2 is characterized in that fixing glue frame also has a cover plate on this, and this cover plate is disposed at this fixedly on the rubber base.

4. as the described fixing glue frame of one of claim 1 to 3 group, it is characterized in that this corner of this corner trunking comprises right angle, acute angle and obtuse angle.

5. fixing glue frame group as claimed in claim 1 is characterized in that, also has a plurality of spacing salient points in this corner trunking, in order to limit the displacement of this power lead.

6. fixing glue frame group as claimed in claim 1 is characterized in that each described fastening piece has an opening, and this opening is suitable for being fastened on described projection on one of them, so that should go up fixing glue frame and this time fixing glue frame interfixes.

7. backlight module comprises:

One light guide plate, it has at least one light entrance face, at least one smooth diffusingsurface and a light-emitting face;

At least one fluorescent tube, the one end connects a power lead, and this fluorescent tube is disposed at by this light entrance face, and the light that this fluorescent tube provided can be incident in this light guide plate by this light entrance face, and through behind this light diffusingsurface, is passed to this light-emitting face outgoing;

One fixing glue frame group, it is suitable for carrying this light guide plate and this fluorescent tube, and this fixing glue frame group comprises:

Fixing glue frame once, it has a corner trunking that comprises at least one corner, and this power lead is disposed in this corner trunking, and described corner trunking is positioned at the position of the ends exposed of this power lead in the outside of this time fixing glue frame; And

Fixing glue frame on one, it is disposed on this time fixing glue frame, and should go up fixing glue frame and have a window, exposing this light-emitting face,

The sidewall of this time fixing glue frame also has plurality of bump, also had a plurality of fastening pieces and should go up the fixing glue frame corresponding to these projections, each described projection also has a lead-in chamfered, in order to guide described fastening piece on described projection, to move, so that described fastening piece correspondence is fastened on the described projection.

8. backlight module as claimed in claim 7 is characterized in that, this time fixing glue frame also has a fixing rubber base, and this corner trunking is positioned at this fixedly on the rubber base.

9. backlight module as claimed in claim 8 is characterized in that fixing glue frame also has a cover plate on this, and this cover plate is disposed at this fixedly on the rubber base.

10. backlight module as claimed in claim 7 is characterized in that, this corner of this corner trunking comprises right angle, acute angle and obtuse angle.

11. backlight module as claimed in claim 7 is characterized in that, also has a plurality of spacing salient points in this corner trunking, in order to limit the displacement of this power lead.

12. backlight module as claimed in claim 7 is characterized in that, each described fastening piece has an opening, and this opening is suitable for being fastened on described projection on one of them, so that should go up fixing glue frame and this time fixing glue frame interfixes.

13. backlight module as claimed in claim 7 also comprises a blooming piece, this blooming piece is disposed on this light-emitting face.

14. backlight module as claimed in claim 7 also comprises a reflex housing, this reflex housing is disposed at this fluorescent tube side and covers this fluorescent tube.

15. backlight module as claimed in claim 7 also comprises a reflector plate, this reflector plate is disposed at the bottom of this light guide plate.

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