KR100782093B1 - Optical film - Google Patents

Abstract

The present invention relates to an optical film. The present invention includes a structure in which the first membrane piece, the second membrane piece, and the connecting member are integrally formed. The first membrane piece is composed of a first structural surface and a first back surface, the second membrane piece is located below the first membrane piece and is composed of a second structural surface and a second back surface, and the second structural surface is the first structure surface. Adjacent to the first back side of the membrane piece.

Optical Film, Film Piece, Structural Plane, Back Side, Prism, Optical Display, Positioning Groove

Description

Optical film {OPTICAL FILM}

1 is a view showing the basic structure of a backlight module according to the prior art.

2 is a view of an optical film raw material according to the present invention.

3 is a view showing the optical film of the first embodiment according to the present invention, prepared after cutting the optical film raw material of FIG.

4 is a front view of the optical film of FIG. 3 according to the present invention.

5 and 6 are diagrams showing that the prism line of the optical film prism of the present invention is stretched in a high and low relief shape.

7 to 10 are diagrams showing that the prism of the optical film of the present invention is high and the prism lines are stretched in a wave form along the axial direction.

Fig. 11 is a view showing that the optical film film piece of the first embodiment according to the present invention is rotated.

12 is a partial cutaway view of a state in which the optical film of the first embodiment according to the present invention is completed.

Fig. 13 is an exploded view of a backlight module showing that the optical film of the first embodiment according to the present invention is applied for a single-layer optical display device.

Fig. 14 is a view showing an optical film and a frame of the first embodiment according to the present invention.

FIG. 15 is an exploded view showing that the optical film of the first embodiment according to the present invention is applied for a multilayer optical display, similar to FIG.

16 is a view showing a state before assembling the optical film of the second embodiment according to the present invention.

17 is a partial cutaway view of the optical film assembly of the second embodiment according to the present invention is completed.

18 is a view showing an optical film set composed of a first optical film and a second optical film according to the present invention.

19 is an assembly view showing that the optical film set of FIG. 18 according to the present invention is applied to use of a multilayer display device.

20 is an assembly view showing that the prism of each optical film according to the present invention is stretched in a wave form, similar to FIG. 19.

It is a figure which shows the prism line relationship of a 1st membrane piece and a 3rd membrane piece after overlapping and installing FIG. 20 concerning this invention.

It is a figure which shows the prism line relationship of a 2nd membrane piece and a 4th membrane piece after overlapping and installing FIG. 20 concerning this invention.

23 and 24 are views showing the optical film shown in FIG. 18 obtained by cutting raw materials according to the present invention.

[Description of Symbols for Main Parts of Drawing]

10 (10 ') optical film 12 first film piece 13 first structural surface

131 prism 131a prism line 14 first back

15 (15 ') first protrusion 16 second membrane piece 17 second structural surface

171 prism 171a prism line 18 second back

19 (19 ') second projection 20 (20') connecting member 21 first end

22 Second End 23 Prism 231 Prism Line

24 Prism 241 Prism Line 25 (25 ') Diffusion Film

26 LGP 28 Frame 281 First Positioning Groove

282 2nd positioning groove 30 Frame 301 (301 ') 1st positioning groove

302 (302 ') second positioning groove 32 optical film 34 first film piece

341 First structural surface 341a Prism line 36 Second membrane piece

361 2nd structural surface 361a prism line 38 connecting member

40 Optical Film Set 50 First Optical Film 52 First Film Piece

521 First Construction Surface 522 First Rear 523 First Prism

523a Prism line 54 2nd film piece 541 2nd structural surface

542 Second back 543 Second prism 543a Prism line

56 Connecting member 60 Second optical film 62 Third film piece

621 Third Structural Plane 622 Third Back 623 Third Prism

623a prism line 64 fourth membrane piece 641 fourth structure surface

642 fourth back 643 fourth prism 643a prism line

66 Connecting member 70 Diffusion film 72 Light guide plate

80 Optical Film Set 82 First Optical Film 821 First Film Piece

822 prism 822a prism line 823 second film

824 Prism 824a Prism Line 84 Second Optical Film

841 3rd film piece 842 prism 842a prism line

843 4th film piece 844 prism 844a prism line

A, B, C Raw Material θ Narrow Angle L1 to L4 First to Fourth Axes

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight module of an optical display device, and more particularly, to an optical film capable of condensing light rays and increasing luminance.

The optical film has a very fine and fine structure, and is generally designed to promote the effective use of light rays. When using the optical film, pay special attention to the order of assembly and the direction of the film surface. It should be avoided to be impossible.

As shown in FIG. 1, in a backlight module structure of an optical film, such as a commonly used brightness enhancement film (BEF), the backlight module includes a light guide plate 1 and a diffuser. 2), and two brightness enhancing films 3 and 4. The light guide plate 1 disperses the line light source with an equal exposure light source, and the diffusion film 2 is positioned above the light guide plate 1 so that the light is diffusely reflected and diffused evenly. The surfaces of the two brightness enhancement films 3 and 4 are each composed of a plurality of parallel prisms 3a and 4a, and the brightness enhancement films 3 and 4 condense the light beams by the installation of the prisms 3a and 4a. By increasing the light source effect of the light guide plate 1, and further to implement the performance of increasing the brightness of the entire backlight module.

In order to assemble the brightness enhancing film 3 and the brightness enhancing film 4 so that the two brightness enhancing films 3 and 4 sufficiently exhibit the light converging effect, the brightness enhancing film 3 having the prism 3a is provided. ) And one side of the brightness enhancement film 4 having the prism 4a should face in the same direction, and between the prism line extending direction of the prism 3a and the prism line extending direction of the prism 4a. It is most preferable to make the angle at, and to make it perpendicular to the intersection.

However, the brightness enhancement film 3 and the brightness enhancement film 4 currently used exist in the form of a single piece, and are superimposed one by one at a time in assembling, thus not only increasing the work time unnecessarily, During the assembly process, the worker easily makes a mistake so that one side of the brightness enhancement film 3 with the prism 3a and one side of the brightness enhancement film 4 with the prism 4a are installed in a back-to-back manner. Even when the light converging effect cannot be exhibited or when one surface of the brightness enhancement film 3 with the prism 3a and one surface of the brightness enhancement film 4 with the prism 4a are placed in the same direction, the prism The prism line extension direction of (3a) and the prism line extension direction of the prism 4a are made parallel. As described above, due to the above-described discrimination and error, it is necessary to disassemble and rework the already assembled backlight module, resulting in an increase in an assembly process and an increase in unnecessary work time.

With reference to the foregoing, the inventors of the present invention finally completed the present invention based on the manufacturing experience that has been engaged in the development of the backlight module for a long time through specific studies.

An object of the present invention is to condense two light beams, connect and install a film piece to increase the brightness, so that the operator can avoid discrimination and error during assembly, and furthermore, an optical film that improves the assembly efficiency at the time of reducing work time. To provide.

Therefore, in order to achieve the above object, the optical film provided by the present invention includes the first film piece, the second film piece and the connecting member in a perfect form. The first membrane piece is composed of a first structural surface and a first back surface, the second membrane piece is located below the first membrane piece and is composed of a second structural surface and a second back surface, and the second structural surface is the first structure surface. Adjacent to the first back surface of the membrane piece, the connecting member is composed of a first end and a second end, the first end is in contact with the first membrane piece, and the second end is in contact with the second membrane piece.

In order to explain the structure and features of the present invention in detail, it will be described with reference to the following preferred embodiments.

EXAMPLE

2 to 4, in the optical film according to the first embodiment of the present invention, the optical film 10 is a first integrally cut by a raw material (A), the first integrally connected to each other The film piece 12, the second film piece 16, and the connecting member 20 are formed. The first film piece 12 has a rectangular shape and is composed of a first structured surface 13, a first opposing surface 14, and a first protrusion 15. Reference numeral 13 is a first optical structure of a plurality of linear prisms 131, the prism lines 131a of the linear prism 131 extend in a linear direction and are formed in parallel with each other. The first protrusion 15 is formed to protrude outward from the long side edge of the first membrane piece 12.

The second membrane piece 16 also has a rectangular shape, and is composed of a second structural surface 17, a second rear surface 18, and a second protrusion 19. The second structural surface 17 includes a plurality of linear prisms. A second optical structure of 171, wherein the prism lines 171a of the linear prism 171 extend in a linear direction and are formed in parallel with each other, and the second protrusion 19 is the second film piece. It protrudes in the outward direction from the long side edge of 16, and the 2nd protrusion part 19 is located in the other side from the 1st protrusion part 15. As shown in FIG.

The connecting member 20 is arcuate, and includes a first end 21 and a second end 22, and as shown in FIG. 3, the first end 21 and the first membrane piece 12. Is connected at one corner of the second end 22, and the second end 22 is connected at one corner of the second membrane piece 16.

The optical film 10 described above has a structure of a plurality of prisms 131 and 171, which causes a light condensing effect when light rays pass through the prism 131 and 171 from below the back surface of the film piece. 10 is also referred to as a brightness enhancement film or a prism sheet, and is one of the members required for the backlight module of the optical display device.

In the optical film of the present invention, as shown in FIGS. 3 and 4, the prism extends in a straight line toward a direction previously arranged in an elevation manner, and the prism is illustrated in FIGS. 5 and 4. 6, the prism line 231 of the prism 23 is installed in a straight line when viewed from above, and the prism line 231 when viewed from the side. It can be seen that it extends in the form of low and low relief. In addition, FIG. 7 shows a prism provided in the form of a curved curve, and the prism line 241 of the prism 24, when viewed in FIG. 8, extends in a wave form along the axial direction, and the prisms in FIGS. 9 and 10. (24) shows the same height.

In the assembling method of the optical film according to the present invention described below:

First, as shown in FIG. 4, since the optical film 10 is first cut by the raw material A, the pre-assembly form of the optical film 10 has a first structure surface 13 and a second structure. The surfaces 17 face the same direction.

As shown in FIG. 11, the optical film 10 has the first structural surface 13 and the second structural surface 17 facing the same direction with the connecting member 20 as the rotation point during the assembly process. At the same time, the first membrane piece 12 and the second membrane piece 16 are pulled and turned, or one membrane piece is fixed and immovable and the other membrane piece is rotated in a relatively rotational manner. The membrane pieces 12 and the second membrane pieces 16 are brought closer to each other, and reach up to the second membrane pieces 16 to be positioned below the first membrane pieces 12, and the first protrusion 15 and the second protrusions 19 ) Are aligned to face each other, and the second structural surface 17 and the first rear surface 14 are adjacent to each other, and as shown in FIG. 12, the prism line of the first film piece 12 in this form ( 131a and the prism line 171a of the second film piece 16 cross each other in the vertical direction. The first projection 15 and the second projection 19 overlap each other and face each other to form a projection provided at one position together, and the connecting member 20 faces each other and overlaps the first film piece 12. The second membrane piece 16 has a form protruding outward and forms a protrusion provided at another fixed position, whereby each of the above-described positioned protrusions is continuously used for in-situ assembly, which will be described later.

In the process of folding and stacking the above-described optical film 10, a worker accidentally installs one of the film piece structure surfaces in reverse, that is, the first structure surface 13 and the second structure surface 17 are held back. When installed face-to-face, the long and short edges of the first membrane piece 12 and the second membrane piece 16 and the first protrusion 15 and the second protrusion 19 are found to be unable to face each other, at which point the worker Recognize that assembly error occurs and correct error beforehand to smoothly carry out subsequent assembly work. If both the first membrane piece 12 and the second membrane piece 16 are squares with long edges, the operator should pay attention only to whether the first protrusion 15 and the second protrusion 19 are aligned with each other. Just do it. As such, the first membrane piece 12 and the second membrane piece 16 of the present invention are manufactured in a contiguous manner, and are used to easily determine whether the assembly process is correct and have an advantage of increasing assembly efficiency.

As comprehensively shown in Fig. 13, members of the optical film 10 (i.e., the brightness enhancement film), the diffusion film 25, and the light guide plate 26 according to the present invention may be inserted into the frame 28 at the same time. As a sectional view showing that it is ready, the frame 28 already has a first positioning groove 281 and a second positioning groove 282 at a particular position. Since the diffusion film 25 and the light guide plate 26 are not the focus of the present invention, only the relationship between the optical film 10 and the frame 28 according to the present invention will be described below:

In the optical film 10, only the first protrusion 15 and the second protrusion 19 enter the first positioning groove 281 together, and the connecting member 20 enters the second positioning groove 282. Only in the state can be installed smoothly in the frame 28 (see Fig. 14), the optical film 10 to form a prism structure surface to maintain the exact facing direction. In other words, the in-position protrusions formed by the first protrusion 15, the second protrusion 19, and the connecting member 20, respectively, have the effect of helping the worker to assemble accurately, and furthermore, the assembly and error This prevents confusion in assembly.

The above-described member is applied for a single-sheet optical display device. Of course, it can be seen that the member is increased or decreased according to the application requirements of the actual product. For example, the member applied for the multilayer optical display device is composed of two optical films 10 and 10 ', two diffusion films 25 and 25' and one light guide plate 26, which are shown in FIG. As shown in the drawing, the optical film 10 'and the diffusion film 25' are installed in a manner of opposing the other sets of the optical film 10 and the diffusion film 25. Two first positioning grooves 301 and 301 'and two second positioning grooves 302 in the frame 30 used in the multilayer optical display device to facilitate assembly of the two optical films 10 and 10'. , 302 ', wherein the first positioning groove 301 is used to fit the first protrusion 15 and the second protrusion 19 of the optical film 10, and the second positioning groove 302 Silver is used to fit the connecting member 20, and the first positioning groove 301 'is used to fit the first protrusion 15' and the second protrusion 19 'of the optical film 10'. Use second positioner Groove 302 'coupling member (20', is used to fit a).

As comprehensively shown in Fig. 16, in the second embodiment of the optical film according to the present invention, the optical film 32 is likewise first cut so that the first film piece 34 and the second film piece 36 are integrally formed. And a connecting member 38, facing the same direction of the first structural surface 341 of the first membrane piece 34 and the second structural surface 361 of the second membrane piece 36, contrasted with FIG. 3. As can be seen from the above, although the form before assembling the optical film 32 of this embodiment is different from that of the optical film 10 of the first embodiment described above, the assembling method of the optical film 32 is as described above. That is, likewise, the first membrane piece 34 and the second membrane piece 36 overlap vertically by pulling the membrane piece to the rotational point by rotating the connecting member 38, and as shown in FIG. 17, the first membrane piece ( The prism line 341a of 34 and the prism line 361a of the second film piece 36 intersect to form a narrow angle θ, and the narrow angle θ is smaller than 90 °.

As in another application of the present invention shown in Figs. 18 and 19, an optical film set 40 composed of the first optical film 50 and the second optical film 60 is incorporated into the backlight module of the multilayer display device. In this case, the first optical film 50 is integrally molded, and includes a first film piece 52, a second film piece 54, and two connecting members 56. The first membrane piece 52 is composed of a first structural surface 521 and a first rear surface 522, and the second membrane piece 54 is composed of a second structural surface 541 and a second rear surface 542. The first structural surface 521 and the second structural surface 541 form optical structures of a plurality of linear prisms, a first prism 523 and a second prism 543, respectively, and the first prism 523. The prism line 523a of) and the prism line 543a of the second prism 543 are installed in parallel while extending in a linear direction.

Similarly, the second optical film 60 is integrally formed, and includes a third film piece 62, a fourth film piece 64, and two connecting members 66, among which the third film piece 62 is formed. Is composed of a third structural surface 621 and a third back surface 622, the fourth film piece 64 is composed of a fourth structural surface 641 and the fourth back surface 642, the third structure The surface 621 and the fourth structural surface 641 also form optical structures of a plurality of linear prisms, the third prism 623 and the fourth prism 643, respectively, and the prism lines of the third prism 623. 623a and the prism lines 643a of the fourth prism 643 are installed in parallel while extending in a linear direction.

When the optical film set 40 is used to be assembled with two diffusion films 70 and one light guide plate 72, first, the light guide plate 72 is disposed between the two diffusion films 70, and then the two Diffusing films 70 are disposed together with the light guide plate 72 between the third film piece 62 and the fourth film piece 64 of the second optical film 60, and then the second optical film 60 is formed by the first film. It is provided between the first film piece 52 and the second film piece 54 of the optical film 50, so that the entire optical film set 40 exhibits a sufficient light condensing effect. The prism lines 523a and 543a of the first optical film 50 should be installed so as not to be parallel to the prism lines 623a and 643a of the second optical film 60. The third structural surface 621 faces the first rear surface 522 of the first film piece 52, and the prism line 623a of the third prism 623 and the prism line of the first prism 523. (523a) The fourth structural surface 641 faces the second rear surface 542 of the second membrane piece 54, and similarly to the prism line 643a and the second prism 643 of the fourth prism 643. The prism line 543a of the prism 543 intersects to form a narrow angle, which is most preferably 90 degrees.

As described above, the optical film 40 according to the present invention is sandwiched so as to surround the second optical film 60 with the first optical film 50 at the time of assembly, whereby four pieces of optical film must be superimposed and installed. It not only improves the disadvantages of confusion and discriminant errors in the method, but also enables the worker to complete the assembly more quickly.

As shown in FIG. 20, in the optical film set 80 applied to another multilayer display backlight module, the optical film set 80 is likewise the first optical film 82 and the second optical film 84. ), And the installation manner of the first optical film 82 and the second optical film 84 is the same as the optical film set 40 described above, and the structure of the optical film set 80 is approximately the optical film set. The same as 40, except that all of the optical film prisms of the optical film set 80 extend in a wave form.

As shown in FIG. 21 and FIG. 22, the first optical film 82 and the second optical film 84 are completed by being stacked. Here, as shown in FIG. 21, the first optical film The first film piece 821 of 82 is provided adjacent to the third film piece 841 of the second optical film 84, and the prism line of the prism 822 of the first film piece 821 in this state. 822a extends in a wavy shape along the first axial direction L1, and the prism line 842a of the prism 842 of the third membrane piece 841 is wavy along the third axial direction L3. And the first axial direction L1 and the third axial direction L3 cross each other to form a narrow angle.

As shown in FIG. 22, the second film piece 823 of the first optical film 82 is provided adjacent to the fourth film piece 843 of the second optical film 84, and the second film piece 823 is formed of the second film piece 823. The prism line 824a of the prism 824 extends in a wave shape along the second axial direction L2, and the prism line 844a of the prism 844 of the fourth membrane piece 843 has a fourth axis. It extends in a wave shape along the direction L4, and the second axial direction L2 and the fourth axial direction L4 also cross to form a narrow angle.

The angle of the narrow angle formed by crossing the first axial direction L1 and the third axial direction L3 and the narrow angle formed by the second axial direction L2 and the fourth axial direction L4 are the present embodiments. In the example, it is 90 degrees, and the performance generated by the optical film set 80 is the same as that of the optical film set 40, and thus will not be described here.

Hereinafter, as illustrated in FIGS. 23 and 24, for example, the first optical film 50 (82) or the second optical film 60 ( 84)) shows the same shape as before the assembly, of which Figure 23 shows the raw material (B) is cut in a flat unfolded form, Figure 24 shows the raw material (C) is cut after half folded It should be noted that the connecting members which are not faced at the time of cutting are cut directly, so that the two membrane pieces are connected to each other when deployed.

As described above, the drawings and descriptions are merely embodiments of the present invention. Therefore, equivalent changes, additions, and modifications performed by those skilled in the art according to the specification and claims of the present invention should all be included in the claims of the present invention.

According to the present invention, an optical film is provided which connects and installs a film piece that condenses two light beams to increase luminance, thereby preventing discrimination and misunderstanding of an operator during assembly, and further improving assembly efficiency by shortening working time.

Claims (28)

In an optical film that is integrally molded and installed in a frame for use in a backlight module of a display device, First film piece, second film piece and connecting member Including, And a positioning projection which is used for positioning when the connecting member is assembled in the frame when the first film piece and the second film piece are rotated and overlapped. The method of claim 1, The first film piece is composed of a first structured surface and a first opposing surface, the first structure surface having a plurality of first optical structures, The second film piece is composed of a second structural surface and a second back surface, and the second structural surface has a plurality of second optical structures. The method of claim 2, And the first optical structure and the second optical structure are made of a prism. The method of claim 3, The prism is composed of a linear prism, The prism lines of the linear prism are parallel to each other in a linear extension form. The method of claim 3, The prism is made of a linear prism, The prism lines of the linear prism are adjacent to each other in the form of a wavy extension. In the optical film that can be assembled in the frame, used for the backlight module of the display device, First membrane piece, second membrane piece and connecting member Including, The first membrane piece is composed of a first structural surface and a second back surface, The second membrane piece is located below the first membrane piece, The second membrane piece is composed of a second structural surface and a second back surface, The second structural surface and the first rear surface of the first membrane piece are adjacent to each other, The connecting member is composed of a first end and a second end, The first end is connected to the first membrane piece, The second end is connected to the second membrane piece, And the connecting member protrudes outward to form a positioning protrusion used for positioning when mounted in the frame. The method of claim 6, The first structural surface of the first film piece is composed of a plurality of first prisms, The second structural surface of the second film piece is composed of a plurality of second prisms. The method of claim 7, wherein The first prism and the second prism are made of a linear prism, The prism line of the first prism and the prism line of the second prism cross each other in a linearly extending form to form a narrow angle. The method of claim 8, And the narrow angle is between 0 ° and 90 °. The method of claim 7, wherein The first prism and the second prism are made of a linear prism, The prism line of the first prism forms a wavy extension along the first axial direction, The prism line of the second prism forms a wavy extension along the second axial direction, The first axial direction and the second axial direction intersect to form a narrow angle An optical film, characterized in that. The method of claim 10, And the narrow angle is between 0 ° and 90 °. The method of claim 6, At least one film piece of the first film piece and the second film piece is provided with a protrusion to be used for positioning during assembly. The method of claim 1, The first membrane piece has a first protrusion, and the second membrane piece has a second protrusion, And when the first film piece and the second film piece are rotated and overlapped, the first film part and the second film part overlap each other and are aligned to face each other, and are used for positioning when mounted in the frame. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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