CN100424559C - Support structure and backlight module using the support structure - Google Patents

Abstract

The invention discloses a supporting structure, which is applied in a backlight module. The backlight module includes multiple optical films. The supporting structure includes a fixing part and a supporting part. The fixing piece has a hole and a notch, and the hole communicates with the notch. The supporting member includes a supporting column, a resisting bump, a resisting plate and a raised point. The top of the supporting column is used to support the optical films, and the resisting bump is arranged at the bottom of the supporting column. The butt plate is arranged on the support column. The bumps are protruded on the bottom plate toward the bottom. When the abutment bump passes through the hole and rotates at an angle, the abutment plate and the abutment bump respectively abut against the upper and lower sides of the fixing member to clamp the fixing member, and the protrusions are fastened to the notches to position the support member. In this way, the supporting part is fixed on the fixing part.

Description

Support structure and backlight module using the support structure

technical field

The present invention relates to a support structure, and in particular to a support structure used in a backlight module.

Background technique

The manufacturing technology of liquid crystal display device (LCD device, LCD device) develops rapidly in recent years, which makes the liquid crystal display device greatly improved in terms of image quality, response rate and panel size. And because of its advantages such as small size, light weight, power saving and low radiation, liquid crystal display devices are widely used in notebook computers, digital cameras, digital video recorders, mobile phones, computer screens and LCD TVs. in electronic products. However, since the liquid crystal display panel in the liquid crystal display device is a non-self-illuminating display panel, a backlight module (backlight module) needs to provide a light source to produce the effect of displaying images.

Please refer to FIG. 1 , which shows a schematic diagram of a conventional backlight module. Generally, a conventional backlight module 10 includes a backplane 11 , at least one support column 12 , a plurality of lamp tubes 13 and a plurality of optical films 14 . The optical films 14 are disposed above the back plate 11 and parallel to the back plate 11 , so that the light emitted by the light source 13 can be evenly diffused to the optical films without dark lines. The support pillars 12 are disposed on the backplane 11 for supporting the optical films 14 to maintain a distance h between the optical films 14 and the backplane 11 and keep them parallel to the backplane 11 .

In the prior art, there are various design schemes for the supporting columns. The Taiwan New Patent No. 284914, which was announced on January 1, 1995, discloses a backlight module embedded with a rotating support column structure, including a support column holder and a backboard component. The support column holder has two tenons, and the tail end of each tenon is extended to form a protrusion. After the support column card holder is rotated, the card protrusions are buckled in the two positioning holes of the backboard to fix the support card holder to the backboard. However, this design method is prone to the tenon fracture phenomenon due to the insufficient strength of the tenon structure itself, and its large structure size relatively increases the cost of mold development.

Also, the Taiwan New Patent No. 284912 of Patent Certificate No. 284912 announced by Taiwan on January 1, 1995 discloses a backlight module rotating support column structure, which is composed of a support swivel seat, a lock pad and a back plate fixing. The support swivel base is screw-locked to the back plate by inserting the buckle rod on the bottom surface of the support swivel seat into the first track hole of the back plate and the second track hole of the lock pad. However, this kind of supporting column structure uses a three-piece design to achieve the purpose of fixing the supporting swivel seat, which not only increases the complexity of the supporting column structure, but also relatively increases the manufacturing cost.

In addition, U.S. Patent No. 7070313 published on July 4, 2006 discloses a lamp guide device and backlight assembly for liquid crystal display device using the same). A backlight assembly supports a plurality of optical sheets by setting a lamp guide on a lower case. A guide connecting hole and a plurality of concavities are respectively formed on the bottom case to fix the lamp guide device to the bottom case, and the lamp guide device can only be used for Lamp type backlight. In this way, not only the complexity and cost of making the bottom case are increased, but also the types of applicable backlight devices are limited.

Contents of the invention

The technical problem to be solved by the present invention is to provide a support structure and a backlight module using it. When the supporting structure and its backlight module are applied, the supporting member with a simple structure is fastened to the matching member with a small hole, which not only reduces the overall volume and reduces the manufacturing cost, but also enhances the fixing strength of the structure.

To achieve the above purpose, the present invention provides a supporting structure, which is applied in a backlight module. The backlight module at least includes a plurality of optical films. The supporting structure includes a fixing part and a supporting part. The fixing piece has a hole and a notch, and the hole communicates with the notch. The supporting member includes a supporting column, a resisting bump, a resisting plate and a raised point. The support column has a top end and a bottom end, and the top end is used for supporting the optical films. The resisting bump is arranged at the bottom end. The butt plate is arranged on the support column. The protruding point is protruded on the bottom plate toward the bottom end. When the abutment bump passes through the hole and rotates at an angle, the abutment plate and the abutment bump respectively abut against the upper and lower sides of the fixing piece to clamp the fixing piece, and the convex points are correspondingly buckled in the notches for positioning and support pieces. So that the supporting part is fixed on the fixing part.

According to the purpose of the present invention, another backlight module is provided, which includes a plurality of optical films, a supporting structure, a circuit board and a light emitting device. The supporting structure includes a fixing part and a supporting part. The fixing part has an upper surface, a hole and a notch, the upper surface is the side of the fixing part facing the optical films, and the hole communicates with the notch. The supporting member includes a supporting column, a resisting bump, a resisting plate and a raised point. The support column has a top end and a bottom end. The top end is used to support the optical films on the fixing part, and the optical films are parallel to the fixing part. The resisting bump is arranged at the bottom end. The butt plate is arranged on the support column. The protruding point is protruded on the bottom plate toward the bottom end. The circuit board is arranged on the upper surface in parallel. The light emitting device is arranged on the circuit board to provide a backlight source. When the abutment bump passes through the hole and rotates at an angle, the abutment plate and the abutment bump respectively abut against the upper and lower sides of the fixing piece to clamp the fixing piece, and the convex points are correspondingly buckled in the notches for positioning and support pieces. So that the supporting part is fixed on the fixing part.

Compared with the prior art, the present invention has the advantages of:

1. The structure of the support is simple, and the hole area is small, which can reduce the mold development cost, and reduce the production cost as a whole.

2. The supporting part can be fixed on the fixing part only through the action of rotation without the assistance of other tools, which can be locked conveniently and quickly.

3. Since the supporting part is fixed on the fixing part, it is only achieved by clamping the fixing part with the abutting plate and the abutting bump, and the fastening of the bump and the notch, so after the supporting part is reversely rotated and taken out, that is This support can be reused.

In order to make the above-mentioned purposes, features, and advantages of the present invention more obvious and understandable, the preferred embodiments are specifically cited below, and in conjunction with the attached drawings, the detailed description is as follows:

Description of drawings

FIG. 1 is a schematic diagram of a conventional backlight module;

2A is a cross-sectional view of a backlight module according to a preferred embodiment of the present invention;

Fig. 2B is a sectional view of another angle of the backlight module of Fig. 2A;

Figure 3 is a schematic diagram of a support structure according to a preferred embodiment of the present invention; and

FIG. 4 is a perspective view of the supporting member in FIG. 3 .

Wherein reference sign is:

10, 20: Backlight module

11: Backplane

12, 261: support column

13: Lamp tube

14, 21: Optical film

22: Support structure

23: circuit board

24: Light emitting device

25: Fixing piece

25a: upper surface

25b: Perforation

25c: notch

26: Support

261a: Top

261b: Bottom

262: Resist bump

263: Arrival board

264: bump

A: Direction

B: Long axis direction

d, h: spacing

θ: included angle

Detailed ways

Please refer to FIGS. 2A and 2B at the same time. FIG. 2A is a cross-sectional view of a backlight module according to a preferred embodiment of the present invention, and FIG. 2B is a cross-sectional view of the backlight module in FIG. 2A from another angle. The backlight module 20 includes a plurality of optical sheets 21 , a supporting structure 22 , a circuit board 23 and a light emitting device 24 . The optical films 21 are stacked. The supporting structure 22 includes a fixing part 25 and a supporting part 26 . The fixing member 25 has an upper surface 25a, a hole 25b and a notch 25c (shown in FIG. 2B ). The upper surface 25 a is a side of the fixing member 25 facing the optical films 21 . The perforated hole 25b communicates with the notch 25c. The supporting member 26 includes a supporting post 261 , a resisting protrusion 262 , a resisting plate 263 and a protruding point 264 (shown in FIG. 2B ). The support column 261 has a top end 261 a and a bottom end 261 b. The top end 261 a is used to support the optical films 21 on the fixing member 25 , and the optical films 21 are parallel to the fixing member 25 . The resisting protrusion 262 is disposed on the bottom end 261b. The resisting plate 263 is disposed on the support column 261 . The protruding point 264 protrudes on the resisting plate 263 toward the bottom end 261b. The circuit board 23 is disposed on the upper surface 25a. The light emitting device 24 is disposed on the circuit board 23 to provide a backlight.

In addition, the fixing member 25 in this embodiment is a back plate of the backlight module 20 , which is made of metal, so that the supporting member 26 can be firmly fixed on the fixing member 25 . The light emitting device 24 is, for example, a light emitting diode (Light Emitting Diode, LED), but it can also be a traditional cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL). In this embodiment, a plurality of light emitting diodes are disposed on the circuit board 23 to serve as a backlight source of the backlight module 20 . The supporting member 26 is used to support the optical films 21 to separate a distance from the fixing member 25 . In this way, there is a space between these optical films 21 and the fixing member 25, so that the light emitted by the light emitting device 24 can be evenly diffused to these optical films 21, so that the backlight provided by the backlight module 20 , is a homogenized light source.

Please refer to FIG. 3 and FIG. 4 at the same time. FIG. 3 is a schematic diagram of a supporting structure according to a preferred embodiment of the present invention; FIG. 4 is a perspective view of the supporting member in FIG. 3 . In this embodiment, the support member 26 includes two protrusions 264, and the fixing member 25 has two notches 25c correspondingly. The resisting plate 263 is a circular flat plate. The two protruding points 264 are located on two sides of the abutting plate 263 opposite to the abutting protrusion 262 . As shown in FIG. 3 , the resisting protrusion 262 is preferably an elliptic cone protrusion to provide good support, and the corresponding perforation 25b is preferably an elliptic perforation. The area of the hole 25b is at least equal to the maximum cross-sectional area of the abutment protrusion 262, so that the abutment protrusion 262 can pass through the hole 25b. When the abutment protrusion 262 passes through the hole 25b and rotates at an angle, the abutment plate 263 and the abutment protrusion 262 abut against the upper and lower sides of the fixing member 25 respectively to clamp the fixing member 25 and the protrusions 264 are correspondingly fastened. The supporting member 26 is positioned in the notch 25 c, so that the supporting member 26 is fixed on the fixing member 25 .

As shown in FIG. 4 , the two protruding points 264 are disposed on opposite sides of the abutting plate 263 along a direction A, and the abutting protrusion 262 has a long axis direction B. As shown in FIG. The included angle θ between the long-axis direction B and the direction A is the angle at which the abutment protrusion 262 passes through the hole 25 b and rotates when the support member 26 is to be fixed on the fixing member 25 . In this embodiment, the included angle θ is preferably 90 degrees. There is a distance d between the resisting plate 263 and the resisting protrusion 262 , and the distance d is substantially equal to the thickness of the fixing member 25 . Therefore, when the supporting member 26 is fixed on the fixing member 25 , the abutting plate 263 and the abutting protrusion 262 just clamp the upper and lower surfaces of the fixing member 25 . The support column 261 is in the shape of a cone, so that when the support member 26 supports the optical films 21 , it is not easy to be skewed.

In addition, since the abutment protrusion 262 and the hole 25b are preferably corresponding oval shapes, when the support member 26 is to be fixed to the fixing member 25, it is first necessary to align the major axis direction B of the abutment protrusion 262 The direction of the long axis of the hole 25b, and the abutment protrusion 262 passes through the hole 25b. When the bump 262 passes through the hole 25b for a certain distance, the bump 264 contacts the upper surface 25a of the fixing member 25. Next, the support member 26 is rotated by an angle relative to the fixing member 25 . This angle is the angle θ between the direction A in which the bumps 264 are arranged and the long-axis direction B, or the supplementary angle of the angle θ. After the support member 26 rotates the above-mentioned angle relative to the fixing member 25 , the protruding point 264 is located at the position of the notch 25 c and correspondingly fastened to the notch 25 c. Since the distance d between the abutting plate 263 and the abutting protrusion 262 is substantially equal to the thickness of the fixing member 25 , the abutting protrusion 262 and the abutting plate 263 clamp the upper surface 25 a and the lower surface of the fixing member 25 respectively. In this way, the supporting member 26 is fixed on the fixing member 25 .

In the support structure and the backlight module using it according to the preferred embodiment of the present invention, the supporting member is fixed on the fixing member by clamping the fixing member with the abutting plate and the abutting bump, and the convex points are correspondingly fastened to the notches. The connector is used to support multiple optical films on the connector.

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 can make various corresponding modifications according to the present invention without departing from the spirit and essence of the present invention. Changes and modifications, but these corresponding changes and modifications should belong to the scope of protection of the appended claims of the present invention.

Claims (21)

1. A support structure applied in a backlight module, the backlight module at least comprises a plurality of optical films, characterized in that the support structure comprises: a fastening piece having a hole and a notch, the hole communicating with the notch; and a support, comprising: A support column has a top end and a bottom end, and the top end is used to support the optical films; a top bump is arranged on the bottom; a butt plate, set on the support column; and a protruding point protrudes on the abutment plate toward the bottom end; Wherein, when the abutment protrusion passes through the hole and rotates at an angle, the abutment plate and the abutment protrusion respectively abut against the upper and lower surfaces of the fixing member to clamp the fixing member, and the protrusion Correspondingly fasten to the notch from above the fixing part to position the supporting part, so that the supporting part is fixed on the fixing part. 2. The supporting structure according to claim 1, wherein the fixing member is a back plate. 3. The support structure according to claim 1, wherein the abutting plate and the abutting protrusion are separated by a distance substantially equal to the thickness of the fixing member. 4. The supporting structure according to claim 1, wherein the supporting member includes two protrusions, and the fixing member correspondingly includes two notches. 5. The support structure according to claim 4, wherein the two bumps are arranged on both sides of the abutment plate along a direction, and the included angle between a major axis direction of the abutment bump and the direction is equal to the angle. 6. The support structure according to claim 5, wherein the angle is 90 degrees. 7. The support structure according to claim 1, wherein the abutting bump is an elliptical tapered bump. 8. The support structure according to claim 1, wherein the perforation is an oval perforation. 9. The support structure according to claim 1, wherein the support column is conical. 10. The supporting structure according to claim 1, wherein the supporting plate is a circular flat plate. 11. A backlight module applying the support structure described in claim 1, comprising a plurality of optical films, characterized in that, the backlight module also includes A support structure comprising: A fixing piece, the fixing piece has an upper surface, a hole and a notch, the upper surface is the side of the fixing piece facing the plurality of optical films, and the hole communicates with the notch; A support, the support includes: A support column has a top end and a bottom end, and the top end is used to support the plurality of optical films on the fixing member; a top bump, arranged at the bottom; a backing board, the backing board is set on the support column; a protruding point protrudes on the abutment plate toward the bottom end; A circuit board is arranged in parallel on the upper surface; A light-emitting device arranged on the circuit board to provide a backlight source; When the abutment bump passes through the hole and rotates at an angle, the abutment plate and the abutment bump respectively abut against the upper and lower sides of the fixing piece to clamp the fixing piece, and the convex points are correspondingly buckled from the top of the fixing piece Connect to the notch to position the supporting piece, so that the supporting piece is fixed on the fixing piece. 12. The backlight module according to claim 11, wherein the plurality of optical films are parallel to the fixing member. 13. The backlight module according to claim 11, wherein the fixing member is a back plate. 14. The backlight module according to claim 11 , wherein the abutting plate and the abutting protrusion are separated by a distance, and the distance is substantially equal to the thickness of the fixing member. 15. The backlight module according to claim 11, wherein the supporting member includes two protrusions, and the fixing member correspondingly includes two notches. 16. The backlight module according to claim 15, wherein the two bumps are arranged on both sides of the abutting plate along a direction, and the included angle between a long axis direction of the abutting bump and the direction is equal to the angle. 17. The backlight module according to claim 16, wherein the angle is 90 degrees. 18. The backlight module according to claim 11, wherein the abutting bump is an elliptical tapered bump. 19. The backlight module according to claim 11, wherein the hole is an oval hole. 20. The backlight module according to claim 11, wherein the support column is conical. 21. The backlight module according to claim 11, wherein the supporting plate is a circular flat plate.

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