TW201506500A - Optical film and film-positioning device - Google Patents

Abstract

An optical film and a film-positioning device are described. The optical film includes a position-limiting unit. The position-positioning unit includes a first position-limiting structure. The first position-limiting structure includes a position-limiting hole and an extension hole. The extension hole extends to connect the position-limiting hole along an axis. One opening on one end of the extension hole connecting to the position-limiting hole is smaller than another opening on another end of the extension hole. When the optical film is moved from an unfixed position to contact and be against at least one part of a frame until the optical film arrives at a fixed position, the at least one part of the frame is fixed in the position-limiting hole to fix the optical film in the frame.

Description

Optical diaphragm and diaphragm positioning device

This invention relates to a diaphragm and, more particularly, to an optical diaphragm and diaphragm positioning device.

The liquid crystal display mainly includes a liquid crystal panel and a backlight module. A general backlight module has a back plate, a light source, a light guide plate, a plastic frame, and an optical film. The light source and the light guide plate are mounted on the back plate, and the plastic frame is disposed on the periphery of the back plate for setting the optical film and carrying the liquid crystal panel. Please refer to FIG. 1 , which is a cross-sectional view showing a combination of a conventional plastic frame, an optical film and a liquid crystal panel. The conventional optical film 410 has a circular hole, and the plastic frame 420 is provided with a corresponding cylindrical body 420a. After the optical film 410 is placed on the cylindrical body 420a of the plastic frame 420 through the round hole, the tape 430 is attached to the optical film 410 and the cylindrical body 420a to fix the optical film 410.

However, the circular hole on the conventional optical film 410 is easily deformed if it is disposed at the edge closer to the optical film 410 when the hole is punched, and the overall width of the optical film cannot be further reduced. In contrast, the cylinder 420a on the plastic frame 420 must also match the position of the circular hole of the optical film 410, and be disposed at a distance D1 from the frame. Therefore, the frame width D2 of the plastic frame 420 is also limited by the position of the cylindrical body 420a and cannot be effectively reduced.

In addition, the technique of manufacturing a circular hole in the optical film 410 is difficult. It is easy to produce wrinkles or burrs on the inner edge of the circular hole, which will result in a gap between the optical films 410 due to wrinkles when the plurality of optical films 410 are stacked. Furthermore, as shown in FIG. 1, the liquid crystal panel 440 is placed on the carrying surface 420b of the plastic frame 420. Therefore, the height of the cylinder 420a cannot be higher than the bearing surface 420b. If the round holes of each of the optical films 410 are wrinkled, the total height after stacking will exceed the height of the cylinder 420a, causing the optical film 410 to fall off or run onto the carrying surface 420b during transport. The assembly man-hour is increased, and even the case where the liquid crystal panel 440 is broken is caused.

Moreover, by the attachment of the tape 430, only the uppermost optical film 410 can be fixed, so that the optical film 410 on which the tape 430 is not attached is easily detached from the cylinder 420a due to vibration during transportation, resulting in the above. The assembly man-hour increases or causes the problem that the liquid crystal panel 440 is fragmented. Moreover, the use of the tape 430 not only has more procedures and costs in the assembly process, but also has a poor fixing effect.

Therefore, there is a need for an optical diaphragm and a diaphragm positioning device to solve the above problems.

Therefore, an aspect of the present invention provides an optical film and a film positioning device which are provided with extension holes in an edge region of the optical film, thereby directly assembling the optical film by using the extended opening state. In the plastic frame, the process of attaching the tape is omitted, and the assembly speed is fast and the limit effect is better.

Another aspect of the present invention is to provide an optical film and a film The positioning device has a head on the plastic frame, and the height of the cylinder is designed according to the thickness and the number of the optical film, so that the optical film can be subjected to the limitation of the limiting hole, The pressing of the head of the positioning post achieves the purpose of fixing the optical film. Moreover, through the design of the limiting hole of the optical film and the positioning column of the plastic frame, the use of the general tape can be omitted, which not only saves cost, but also can avoid the surface of the optical film being damaged due to heavy work during the assembly process. .

In another aspect of the present invention, an optical film and a film positioning device are provided. Since the limiting structure of the optical film forms a hole, the distance of the limiting hole is not required to be considered in the production of the optical film. The problem of too close edges allows the positioning post to be placed closer to the edge of the frame, thereby achieving a frame with a narrow bezel. Moreover, the design of the broken hole can avoid the occurrence of burrs or wrinkles at the edge of the hole of the optical film, thereby improving the assembly quality of the optical film on the plastic frame.

According to the above object of the present invention, an optical film is proposed. This optical film contains a stop unit. The limiting unit has a first limiting structure. The first limiting structure comprises a limiting hole and an extending opening. Wherein, the extended opening is extended along the axis to the limiting hole, and the opening of the extended opening is connected to the opening of the limiting hole is smaller than the opening of the other end. The optical film is moved by an unfixed position to contact at least a portion of the frame, and the optical film is pushed against at least a portion of the frame until at least a portion of the frame is bonded to the limit when the optical film reaches a fixed position. The holes are such that the optical film is bonded into the frame.

According to an embodiment of the invention, the optical film is moved along an axis from an unfixed position such that at least a portion of the frame passes through the extended opening. At the time, the optical film is pushed against at least a portion of the frame.

According to an embodiment of the invention, the optical film further includes a body portion and a positioning portion. The positioning portion is protruded from one side of the body portion, and the first limiting structure is disposed on the positioning portion.

According to an embodiment of the invention, the extension opening has a dimension which is tapered by one side of the optical film along the axis toward the limiting hole.

According to the above object of the present invention, a diaphragm positioning device is further provided, which comprises a plastic frame, an optical film and a limiting unit. The plastic frame has a housing space. The limiting unit is used to bond the optical film into the accommodating space of the plastic frame. The limiting unit includes a first limiting structure and a second limiting structure. The first limiting structure comprises a limiting hole and an extending opening. Wherein, the extended opening is extended along the axis to the limiting hole, and the opening of the extended opening is connected to the opening of the limiting hole is smaller than the opening of the other end. The optical film is moved by an unfixed position to contact at least one second limiting structure, and the optical film is pushed by at least one second limiting structure until the optical film reaches a fixed position, and the second limiting structure is The optical film is bonded to the accommodating space of the plastic frame by being combined in the limiting hole.

According to an embodiment of the invention, the optical film is moved along the axis by the unfixed position, so that when the at least one second limiting structure passes through the extended opening, the optical film is pushed by the at least one second limiting structure. .

According to an embodiment of the invention, the first limiting structure is disposed on the optical film, and the second limiting structure is disposed on the plastic frame.

According to another embodiment of the present invention, the second limiting structure is a positioning post.

According to still another embodiment of the present invention, the positioning post comprises a cylinder and head. The cylinder is disposed on a bottom surface of the accommodating space. The head is placed at the top of one of the cylinders.

According to still another embodiment of the present invention, the optical film includes a body portion and a positioning portion. The positioning portion is protruded from one side of the body portion, and the first limiting structure is disposed on the positioning portion.

According to still another embodiment of the present invention, the plastic frame further includes a groove. The positioning portions are matched and disposed in the grooves.

According to still another embodiment of the present invention, the extension opening is sized by one side of the optical film along the axis toward the limiting hole.

100‧‧‧Backlight module

110‧‧‧Carrier

130‧‧‧Light source

150‧‧‧Light guide plate

170‧‧‧ plastic frame

172‧‧‧ accommodating space

174‧‧‧second limit structure

174a‧‧‧Cylinder

174b‧‧‧ head

190‧‧‧Optical diaphragm

192‧‧ ‧ Body Department

194‧‧‧ Positioning Department

196‧‧‧First limit structure

196a‧‧‧Limited holes

196b‧‧‧Extended opening

196c‧‧‧ side

196d‧‧‧ side

410‧‧‧Optical diaphragm

420‧‧‧ plastic frame

420a‧‧‧Cylinder

420b‧‧‧ bearing surface

430‧‧‧ Tape

440‧‧‧LCD panel

Θ‧‧‧ angle

A1‧‧‧ axis

D1‧‧‧ distance

D2‧‧‧ frame width

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; Cutaway view.

2 is a schematic view of a device of a backlight module according to an embodiment of the present invention.

3 is a schematic view showing the combination of a plastic frame and an optical film according to an embodiment of the present invention.

4 is a schematic exploded view of a plastic frame and an optical film according to an embodiment of the present invention.

Please refer to FIG. 2 , which is a schematic diagram of a device of a backlight module according to an embodiment of the present invention. The backlight module 100 of the embodiment can be The carrier 110, the light source 130, the light guide plate 150, the plastic frame 170 and the optical film 190 are included. The light source 130 and the light guide plate 150 are disposed in the carrier 110 , and the light source 130 emits light toward the light guide plate 150 . The plastic frame 170 is disposed on the carrier 110 and can be used to push the optical film by the side push and is mounted on the plastic frame 170, and the plastic frame 170 can fix the optical film 190. For the sake of clarity, the embodiment of FIG. 2 is exemplified by the side-lit backlight module 100, and is not intended to limit the present invention. In other embodiments, the backlight module may also be a direct-lit backlight module, and the direct-lit backlight module may not use a light guide plate.

Please refer to FIG. 3 and FIG. 4 , which are respectively a schematic diagram and a schematic exploded view of a plastic frame and an optical film according to an embodiment of the present invention. In the present embodiment, the optical film 190 and the plastic frame 170 are coupled to each other by a limiting unit. The limiting unit includes at least one first limiting structure 196 and at least one second limiting structure 174. In an embodiment, the first stop structure 196 is disposed on the optical film 190. The first limiting structure 196 includes a limiting hole 196a and an extended opening 196b. The extension opening 196b is extended to communicate with the limiting hole 196a along the axis A1.

In an embodiment, the second limiting structure 174 is disposed on the plastic frame 170, and the second limiting structure 174 is a positioning post. This positioning post can primarily be used to position the optical diaphragm 190. The plastic frame 170 has an accommodating space 172. The positioning post 174 can be rivet shaped and can include a post 174a and a head 174b. The cylinder 174a is disposed on the bottom surface of the accommodating space 172. The head 174b is provided at the top end of the cylinder 174a.

When the optical film 190 is assembled to the plastic frame 170, it can be extended The hole 196b is directly aligned with the side of the cylinder 174a, and the optical film 190 is displaced from the unfixed position (as shown in Fig. 4) along the axis A1 toward the cylinder 174a, so that the cylinder 174a is extended. The opening 196b enters the limiting hole 196a to reach a fixed position (as shown in FIG. 3), and the positioning post 174 is positioned in the limiting hole 196a. In one embodiment, the diameter of the limiting hole 196a is substantially equal to the diameter of the cylinder 174a to effectively limit the positioning of the column.

The above assembly method is to assemble the optical film 190 to the plastic frame 170 in a lateral direction along the axis A1, but the invention can also assemble the optical film 190 in a straight direction to the glue in a direction perpendicular to the axis A1. On the frame 170, regardless of the lateral or straight direction, when the optical film 190 is moved from an unfixed position (as shown in FIG. 4), it will first contact the second limiting structure 174 of the bezel 170. The optical film 190 is pushed by the second limiting structure 174 of the plastic frame 170 to cause deformation of the material, so that the first limiting structure 196 of the optical film 190 just expands to the second limit of the plastic frame 170. The bit structure 174 can be embedded until the optical film 190 reaches a fixed position (as shown in FIG. 3). Therefore, the assembly of the present invention is not limited to lateral assembly, and straight assembly is also provided.

In an embodiment, and the extension opening 196b is connected to the one end of the limiting hole 196a, the opening is smaller than the opening of the other end. That is, the extension opening 196a is sized to be tapered from the edge of the optical film 190 along the axis A1 toward the limiting hole 196a. In an embodiment, the extension opening 196b has two side edges 196c and 196d. There is an angle θ between the side edges 196c and 196d. The angle of the angle θ can be designed according to the diameter or shape of the cylinder 174a, or other assembly requirements, so that the extended opening 196b can be guided. The positioning post 174 enters the limiting hole 196a.

In an embodiment, the optical film 190 can include a body portion 192 and a positioning portion 194. The body portion 192 is defined as a portion of the entire optical film 190 that is not covered by the bezel 170, and is a portion that mainly exerts a desired optical effect. The positioning portion 194 is protruded from one side of the body portion 192 , and the first limiting structure 196 can be disposed on the positioning portion 194 .

After the assembly of the optical film 190 is completed, the head 174b of the positioning post protrudes above the optical film 190. Thereby, the head 174b can press and limit the optical film 190 to prevent the optical film 190 from coming out of the positioning post. In an embodiment, the backlight module 100 can include a plurality of optical films 190. The height of the cylinders 174a may vary with the number and thickness of the optical films 190. Therefore, the total thickness of the optical film 190 can be equal to the height of the cylinder 174a, and when the optical film 190 is fixed on the positioning post, the head 174b of the positioning post can be pressed against the optical film 190 to fix the optical. Diaphragm 190. In addition, in order to cooperate with the design of the positioning portion 194, the accommodating space 172 of the plastic frame 170 can be an accommodating space 172 having a recess. When the optical film 190 is mounted on the plastic frame 170, the positioning portion 194 can also correspond to It is embedded in the accommodating space 172.

In order to be clear, the general circular hole must be disposed at a position away from the frame by the optical film due to the limitation of the processing mode, and the first limiting structure 196 of the present embodiment is no longer limited by the conventional processing method. It may be disposed at any position of the optical film 190 (or the positioning portion 194), or may be disposed at a position close to the edge of the optical film 190 (or the positioning portion 194). Since the position of the cylinder 174a of the second limiting structure 174 is relative to the limiting hole 196a The position is designed so that the bezel width of the bezel 170 can be reduced in response to the positional displacement of the post 174a. In this way, the plastic frame 170 having a narrow bezel design can be achieved.

In terms of assembly effect, the embodiment of the present invention uses a combination of two optical films 190 on the plastic frame 170 as an experimental object. The conditions of the vibration experiment are sinusoidal vibration 1.5 gravitational acceleration (G), vibration frequency of 5 Hz (Hz)-500 Hz, scanning speed of 0.5 octaves per minute (octave) and X, Y, and Z axial directions, respectively. Shake for 30 minutes. It can be seen from the experimental results that the optical film is not displaced after the vibration by the positioning hole of the optical film and the positioning of the optical film by the head of the positioning portion. It can be seen that the design of the limiting hole and the positioning post of the embodiment can provide a good fixing effect on the optical film.

According to the embodiment of the present invention, an advantage of the present invention is that an extended opening is provided in an edge region of the optical film, so that the optical film can be directly assembled into the plastic frame by using the extended opening state, and the tape is omitted. The attached process achieves the purpose of quick assembly and better limit.

According to the embodiment of the present invention, another advantage of the present invention is that the positioning post on the plastic frame has a head, and the height of the cylinder is designed according to the thickness and the number of the optical film, so that the optical film is limited. In addition to the limit of the hole, it can also be pressed by the head of the positioning post to achieve the purpose of fixing the optical film. Moreover, through the design of the limiting hole of the optical film and the positioning column of the plastic frame, the use of the general tape can be omitted, which not only saves cost, but also can avoid the surface of the optical film being damaged due to heavy work during the assembly process. .

It can be seen from the above embodiments of the present invention that another advantage of the present invention is that the design of the optical film is not limited to the edge of the limiting hole because the limiting hole of the optical film and the extending opening form a hole. The problem is too close, which in turn allows the positioning post to be placed closer to the edge of the frame, whereby a frame with a narrow bezel can be achieved. Moreover, the design of the broken hole can avoid the occurrence of burrs or wrinkles at the edge of the hole of the optical film, thereby improving the assembly quality of the optical film on the plastic frame.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

170‧‧‧ plastic frame

172‧‧‧ accommodating space

174‧‧‧second limit structure

174a‧‧‧Cylinder

174b‧‧‧ head

190‧‧‧Optical diaphragm

192‧‧ ‧ Body Department

194‧‧‧ Positioning Department

196‧‧‧First limit structure

196a‧‧‧Limited holes

196b‧‧‧Extended opening

196c‧‧‧ side

196d‧‧‧ side

Θ‧‧‧ angle

A1‧‧‧ axis

Claims (12)

An optical film comprising: a limiting unit having at least one first limiting structure, the at least one first limiting structure comprising a limiting hole and an extending opening, wherein the extending opening is along a The axis extends to communicate with the limiting hole, and the opening of the extending opening is open at one end of the limiting hole is smaller than the opening of the other end, and the optical film is moved by an unfixed position to contact at least a portion of a plastic frame. The optical film is pushed against at least a portion of the plastic frame until at least a portion of the plastic frame is bonded to the limiting hole, and the optical film is bonded to the plastic frame. Inside. The optical film of claim 1, wherein the optical film is moved by the unfixed position along the axis such that at least a portion of the frame passes through the extended opening, the optical film is subjected to the glue At least part of the box is pushed. The optical film of claim 1, wherein the optical film further comprises: a body portion; and at least one positioning portion protruding from one side of the body portion, and the at least one first limiting structure is disposed at The at least one positioning portion. The optical film of claim 1, wherein the size of the extended opening is tapered by a side of the optical film along the axis toward the limiting hole. A film positioning device comprising: a plastic frame having an accommodating space; at least one optical film; and a limiting unit for bonding the optical film to the accommodating space of the plastic frame The limiting unit includes at least one first limiting structure and at least one second limiting structure, the at least one first limiting structure includes a limiting hole and an extending opening, wherein the extended opening is along an axis Extendingly communicating with the limiting hole, and the opening of the extending opening is open at one end of the limiting hole is smaller than the opening of the other end, and the optical film is moved by an unfixed position to contact the at least one second limiting structure, The optical film is pushed by the at least one second limiting structure until the optical film reaches a fixed position, the at least one second limiting structure is incorporated in the limiting hole, and the optical film is It is combined in the accommodating space of the plastic frame. The diaphragm positioning device of claim 5, wherein the optical film is moved along the axis by the unfixed position such that the at least one second limiting structure passes through the extended opening, the optical film The at least one second limit structure is pushed. The film positioning device of claim 5, wherein the at least one first limiting structure is disposed on the optical film, and the at least one second limiting structure is disposed on the plastic frame. The diaphragm positioning device of claim 7, wherein the at least one second limiting structure is a positioning post. The diaphragm positioning device of claim 8, wherein the positioning post comprises: a cylinder disposed on a bottom surface of the receiving space; and a head disposed at a top end of the cylinder. The film positioning device of claim 5, wherein the optical film comprises: a body portion; and at least one positioning portion protruding from one side of the body portion, and the at least one first limiting structure is disposed at The at least one positioning portion. The film positioning device of claim 10, wherein the plastic frame further comprises a groove, and the at least one positioning portion is matched and disposed in the groove. The diaphragm positioning device of claim 5, wherein the extension aperture is dimensioned by a side of the optical diaphragm along the axis toward the aperture.