TWI476485B - Optical film positioning structure - Google Patents

Description

Optical diaphragm limit structure

The present invention relates to an optical film stop structure.

As shown in FIG. 1 , in a conventional backlight module design, when the optical film 102 is to be positioned, a fold 106 is usually formed on the back plate 104 , and the fold 106 is used to abut the optical film 102 . Or embedded in the opening 108 reserved by the optical film 102, the effect of limiting the optical film is obtained. However, since the material of the backing plate 104 is usually a metallic material such as aluminum, a more complicated metal working process is required to form the folded ears 106 to increase the manufacturing cost.

Taiwan Patent Publication No. TW201037421 discloses a backlight module comprising a positioning frame, a light guide plate and a set of stacked optical films, wherein a plurality of notches are formed on the positioning frame, and each optical film has a film flange corresponding to the notch position by the positioning frame. The alignment effect of the notch and the diaphragm flange limits the level of the optical film set to be within the positioning frame. Taiwan Patent Publication No. TW200931125 discloses a backlight module comprising a back plate, a plurality of lamps, a plurality of optical films, and a plastic frame. The edge of the optical film is provided with a lug, and the corresponding frame of the plastic frame is provided with a groove. When assembling the optical film and the plastic frame, the lugs can be accommodated in the grooves of the plastic frame.

The invention provides an optical film with simplified process and low manufacturing cost Slice limit structure.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. In an embodiment of the present invention, an optical film limiting structure is provided for limiting at least one optical film to a backlight module. The optical film stop structure includes at least one first flange formed on at least one side of the optical film, and at least one side reflective sheet. The side reflector is disposed adjacent to the optical film and at an angle to the optical film, the side reflector has at least one second flange, and the second flange abuts the first flange to limit the optical film to a In the backlight module.

In one embodiment, at least one side of the optical film forms two first flanges having a spacing from each other, the second flange being placed between the two first flanges and abutting the two first flanges .

In one embodiment, at least one side of the side reflection sheet forms two second flanges having a spacing from each other, the first flange being placed between the two second flanges and abutting the two second flanges .

In one embodiment, the first flange has an opening and the second flange is inserted into the opening of the first flange, or the second flange has an opening and the first flange is inserted into the opening of the second flange. .

In one embodiment, the side reflectors are substantially perpendicular to the optical film.

Another embodiment of the present invention provides an optical film limiting structure including at least one first flange formed on at least one side of the optical film, and at least one Bottom reflection sheet. The bottom reflective sheet has a base portion and at least one side portion at an angle to the base portion, the base portion being substantially parallel to the optical film, the side portion having at least one second flange, and the second flange abutting against the first flange to The optical film is limited to the bottom reflector.

In summary, the optical film limiting structure of the embodiment of the present invention has at least one of the following advantages:

According to the design of the above embodiment, since the back plate of the backlight module does not need to form an optical film positioning structure such as a folded ear, the process of the back plate can be simplified and the processing cost can be reduced, and for example, by bending and pasting. The positioning flange is formed on the reflective sheet, which can effectively strengthen the strength of the positioning structure and simplify the process. In addition, when the light guide plate moves in the backlight module, the reflective sheet can carry the optical film bounded thereon to move together, thereby avoiding the problem that the light guide plate and the optical film are rubbed to cause a poor picture.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. The above and other objects, features, and advantages of the invention will be apparent from

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention. Directional terms mentioned in the following examples, such as: up, down, left, right, Before or after, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

The invention provides an optical film limiting structure for limiting at least one optical film to a backlight module. The optical film may be, for example, a brightness enhancing sheet, a diffusion sheet, etc., and the optical film limiting structure may include a corresponding The plurality of positioning structures formed on a reflective sheet and the optical film to be positioned can provide an effect of limiting the optical film to a backlight module by abutting and engaging between corresponding positioning structures, and reflecting The sheet may be, for example, a side reflection sheet provided on the side of the light guide plate or a bottom reflection sheet provided on the bottom of the light guide plate. Different embodiments of the positioning configuration are illustrated as follows in conjunction with the illustration.

As shown in FIG. 2, the optical film limiting structure 10a includes a first flange 22 formed on at least one side of the optical film 12, and two second flanges 24a formed on the one side reflection sheet 14, 24b. The side reflection sheet 14 is disposed adjacent to the position of the optical film 12 and at an angle to the optical film 12. In one embodiment, the side reflective sheet 14 can be substantially perpendicular to the optical film 12, for example. The two second flanges 24a, 24b of the side reflection sheet 14 have a spacing from each other, and the first flange 22 of the optical film 12 is placed between the two second flanges 24a, 24b of the side reflection sheet 14 and abuts The effect of the limiting optical film 12 can be obtained by the two second flanges 24a, 24b.

As shown in FIG. 3, the optical film limiting structure 10b includes two first flanges 22a, 22b formed on at least one side of the optical film 12, and a second flange formed on the one side reflection sheet 14. twenty four. The side reflection sheet 14 is disposed adjacent to the light The diaphragm 12 is placed at an angle to the optical film 12. In one embodiment, the side reflective sheet 14 can be substantially perpendicular to the optical film 12, for example. The two first flanges 22a, 22b of the optical film 12 have a spacing from each other, and the second flange 24 of the side reflection sheet 14 is placed between the two first flanges 22a, 22b of the optical film 12 and abuts The effect of limiting the optical film 12 can be obtained by the two first flanges 22a, 22b.

As shown in FIG. 4, the optical film limiting structure 10c includes a first flange 22 formed on the optical film 12, and a second flange 24 formed on the one side reflection sheet 14, and the optical film 12 The first flange 22 has an opening 26. When the second flange 24 of the side reflection sheet 14 is placed in the opening 26 of the first flange 22, the effect of limiting the optical film 12 can be provided. Of course, the second flange 24 of the side reflection sheet 14 can also have an opening 26, and the first flange 22 of the optical film 12 can be placed into the opening 26 of the second flange, and the limiting optical film 12 can also be obtained. Effect.

It should be noted that the manner of forming the respective flanges is not limited. For example, as shown in FIG. 5A and FIG. 5B, the convex portion 34 of the one side reflection sheet 14 can be opened with a rectangular opening 36, and then along a fold line P-. P' bends the projections 34 and adheres them with the double-sided tape 38 to form two second flanges 24a, 24b having a pitch and sufficient structural strength. In another embodiment, as shown in FIG. 6A and FIG. 6B, the protrusion 34 can be directly bent along a fold line P-P' and adhered with the double-sided tape 38 to form a second having sufficient structural strength. Flange 24. Of course, each of the above flanges may be formed by cutting the side reflection sheet 14.

As shown in FIG. 7 and FIG. 8 , the bottom reflection sheet 44 may have a base portion M and at least one side portion N at an angle to the base portion M. The side portion N may be formed by bending the bottom reflection sheet 44, for example. When the light guide plate is disposed on the reflective sheet 44 (not shown), the base portion M of the bottom reflective sheet 44 can carry the light guide plate, and the side portion N of the bottom reflective sheet 44 is disposed on the side of the light guide plate. The side portion N can be substantially perpendicular to the base portion M. The base portion M of the bottom reflection sheet 44 is substantially parallel to an optical film 12, and the side portion N of the bottom reflection sheet 44 may form a second flange 54 (FIG. 7) or two second flanges 54a having a spacing from each other, 54b (Fig. 8), the same effect as the above-described side reflection sheet 14 can be provided. In one embodiment, the two second flanges 54a, 54b of the side portion N of the bottom reflection sheet 44 have a spacing from each other, and the first flange 22 of the optical film 12 is placed in the side portion N of the bottom reflection sheet 44. The effect of limiting the optical film 12 can be obtained between the two second flanges 54a, 54b and against the two second flanges 54a, 54b. In one embodiment, the two first flanges 22a, 22b of the optical film 12 have a spacing from each other, and the second flange 54 of the side N of the bottom reflective sheet 44 is placed into the first two of the optical film 12. The effect of limiting the optical film 12 can be obtained between the flanges 22a, 22b and against the two first flanges 22a, 22b. In an embodiment, the first flange 22 of the optical film 12 has an opening 26. When the second flange 54 of the side portion N of the bottom reflection sheet 44 is placed in the opening 26 of the first flange 22, the effect of limiting the optical film 12 can be provided. Of course, the second flange 54 of the side portion N of the bottom reflection sheet 44 may also have an opening 26, and the first flange 22 of the optical film 12 is placed into the opening 26 of the second flange 54, and the same limit is obtained. Optical film 12 effect.

In addition, since the reflective sheet is, for example, a side reflection sheet 14 disposed on the side of the light guide plate or a bottom reflection sheet 44 disposed at the bottom of the light guide plate, the reflection sheet is fixed to the light guide plate by, for example, pasting, and the optical film is transmitted and reflected. The abutment and card cooperation between the positioning structures of the sheet are used to limit the position in the backlight module. Therefore, when the light guide plate moves in the backlight module, the reflective sheet can carry the optical film bounded thereon to move together. Avoiding the problem that the light guide plate and the optical film are rubbed to cause a poor picture.

In summary, the optical film limiting structure of the embodiment of the present invention has at least one of the following advantages:

According to the design of the above embodiment, since the back plate of the backlight module does not need to form an optical film positioning structure such as a folded ear, the process of the back plate can be simplified and the processing cost can be reduced, and for example, by bending and pasting. The positioning flange is formed on the reflective sheet, which can effectively strengthen the strength of the positioning structure and simplify the process. In addition, when the light guide plate moves in the backlight module, the reflective sheet disposed on the side of the light guide plate can carry the optical film supported thereon to move together, thereby avoiding the problem that the light guide plate and the optical film are rubbed to cause a picture defect.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any embodiment or patent application of the present invention The scope of the invention is not intended to be exhaustive or to be construed. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. In addition, the terms "first", "second" and the like mentioned in the specification or the claims are only used to name the components or distinguish different embodiments or ranges, and are not intended to limit the upper or lower limit of the number of components. .

10a, 10b, 10c‧‧‧ optical film limit structure

12‧‧‧Optical diaphragm

14‧‧‧ side reflector

22, 22a, 22b‧‧‧ first flange

24, 24a, 24b, 54, 54a, 54b‧‧‧ second flange

26‧‧‧ openings

34‧‧‧Protruding

36‧‧‧ Rectangular opening

38‧‧‧double-sided tape

44‧‧‧ bottom reflector

102‧‧‧Optical diaphragm

104‧‧‧ Backplane

106‧‧ ‧ Ears

108‧‧‧ openings

M‧‧‧ Base

N‧‧‧ side

P-P’‧‧‧ fold line

Figure 1 is a schematic illustration of a conventional optical film stop structure.

2 is a schematic view of an optical film stop structure according to an embodiment of the present invention.

3 is a schematic view of an optical film stop structure according to another embodiment of the present invention.

4 is a schematic view of an optical film stop structure according to another embodiment of the present invention.

5A and 5B are schematic views showing the formation of an optical film limiting structure according to an embodiment of the invention.

6A and 6B are schematic views showing the formation of an optical film limiting structure according to another embodiment of the present invention.

FIG. 7 is a schematic diagram of an optical film limiting structure according to another embodiment of the present invention.

FIG. 8 is a schematic diagram of an optical film limiting structure according to another embodiment of the present invention. Figure.

10a‧‧‧Optical diaphragm limit structure

12‧‧‧Optical diaphragm

14‧‧‧ side reflector

22‧‧‧First flange

24a, 24b‧‧‧ second flange

Claims (12)

An optical film limiting structure for limiting at least one optical film to a backlight module, the optical film limiting structure comprising: at least one first flange formed on at least one side of the optical film And at least one side reflective sheet disposed adjacent to the optical film and at an angle to the optical film, the side reflective sheet having at least one second flange, and the second flange abuts the first The flange is configured to limit the optical film to a backlight module, wherein the second flange includes a bent side and two bent portions on both sides of the bent side and bonded to each other. The optical film limiting structure according to claim 1, wherein at least one side of the optical film forms two first flanges having a spacing from each other, and the second flange is placed in the two Between the first flanges and against the two first flanges. The optical film limiting structure according to claim 1, wherein at least one side of the side reflection sheet forms two second flanges having a spacing from each other, and the first flange is placed in the two Between the second flanges and against the two second flanges. The optical film limiting structure of claim 1, wherein the first flange has an opening, and the second flange is inserted into the opening of the first flange. The optical film limiting structure according to claim 1 of the patent application, The second flange has an opening therein, and the first flange is inserted into the opening of the second flange. The optical film stop structure of claim 1, wherein the side reflection sheet is substantially perpendicular to the optical film. An optical film limiting structure for limiting at least one optical film to a backlight module, the optical film limiting structure comprising: at least one first flange formed on at least one side of the optical film And at least one bottom reflective sheet having a base portion and at least one side portion at an angle to the base portion, the base portion being substantially parallel to the optical film, the side portion having at least one second flange, and the side portion a second flange abutting the first flange to limit the optical film to the bottom reflective sheet, wherein the second flange comprises a bent side edge and two sides on the side of the bent side and bonded to each other Bend section. The optical film limiting structure according to claim 7, wherein at least one side of the optical film forms two first flanges having a spacing from each other, and the second flange is placed in the two Between the first flanges and against the two first flanges. The optical film limiting structure of claim 7, wherein the side portions form two second flanges having a spacing from each other, the first flange being disposed between the two second flanges And against the two second flanges. The optical film limiting structure of claim 7, wherein the first flange has an opening, and the second flange is disposed in the first convex The opening of the edge. The optical film limiting structure of claim 7, wherein the second flange has an opening, and the first flange is inserted into the opening of the second flange. The optical film limiting structure of claim 7, wherein the side of the bottom reflective sheet is substantially perpendicular to the optical film.