TWI680312B - Reflective sheet structure and backlight module having the same - Google Patents

Abstract

A reflective sheet structure includes a body block, a first block, a second block, and a folded block. The first block is connected to the body block, and a first polyline is defined at the connection; the second block is connected to the body block, and a second polyline is defined at the reconnection, where the first polyline is adjacent to the second polyline, and the first One polyline is not parallel to the second polyline. The folded block is located between the first block and the second block. The folded block includes a superimposed portion and a reverse folded portion. The overlapping part is adjacent to the first block, and the third folding line is defined at the connection between the overlapping part and the first block. The two sides of the refolding part are adjacent to the connecting part of the overlapping part and the second block, respectively. A fourth fold line is defined, and a fifth fold line is defined at a connection between the reverse fold portion and the second block.

Description

Reflective sheet structure and backlight module having the same

The structure of a reflection sheet, particularly a reflection sheet with a folded structure and a backlight module with the reflection sheet.

In the conventional direct-type light box, a backlight module is assembled with a reflection sheet, and the light emitted backward is reflected forward according to the reflection principle to increase the light output efficiency. With the development of science and technology, under the trend of lighter and thinner light boxes, the mixing distance in the light box will become shorter and shorter, and at the same time, the related optical characteristics will become more sensitive, so the flatness and integrity of the reflective sheet are also more demanding.

The four corners of the reflective sheet will be cut to remove the triangular blocks, so that the original four sides of the reflective sheet form four foldable side sheets. After joining the edges of the side sheets to each other, the shape of the reflective sheet is changed. Cooperate with the accommodating area on the inner side of the back cover, and attach it flatly on the inner side of the back cover to form a direct type backlight module. Generally, corner shadows often occur in the four corners of the direct-lit backlight module. The reason for this is that the light path from the light emitting unit to the corner is far away, and the back cover corresponding to the corner will have two adjacent side panels that are poorly spliced and appear to be The problem of the reflection sheet covering, if the splicing is poor, the corner shadows of the backlight module will be more serious. Therefore, an additional reflective sheet needs to be added between the reflective sheet and the back cover to fill the splicing position of the two adjacent side sheets.

In addition, since the hardness and thickness characteristics of the reflective sheet are reflected in the manufacturing cost, considering the manufacturing considerations, it is bound to choose between the thickness and flatness of the reflective sheet. If the hardness is not good, Under the condition, it is necessary to additionally add cushion material or glue material to fill the gap between it and the light box back plate, which will also increase the production cost.

An embodiment of the present invention provides a reflective sheet structure including a body block, a first block, a second block, and a folded block.

The first block extends from the body block, and the connection point with the body block defines a first polyline; the second block connects with the body block, and the connection with the body block defines a second polyline, of which the first polyline and the second polyline Adjacent to each other, and the first fold line and the second fold line are not parallel.

The folded block is located between the first block and the second block. The folded block includes a superimposed portion and a reverse folded portion. The superimposed part is adjacent to the first block, and the connection between the superimposed part and the first block defines a third fold line; the two sides of the reflexed part are adjacent to the superimposed part and the second block, respectively, and the connection between the reflexed part and the superimposed part. A fourth fold line is defined, and a fifth fold line is defined at a connection point between the reverse fold portion and the second block, wherein an edge of one side of the superimposed portion is connected to an outer edge line of the reverse fold portion or an outer edge line of the first block at a connection point And exposed.

As in the above-mentioned reflecting sheet structure, in an embodiment, the fifth fold line and the third fold line are mirror-symmetrical with the fourth fold line as a mirror image.

Another embodiment of the present invention provides a reflective sheet structure that is different from the above embodiment in that the folded block is located between the first block and the second block, and the folded block includes a superimposed portion and a reverse folded portion. The superimposed part is adjacent to the first block, the superimposed part includes the first surface and the opposite first bottom surface, the connection between the superimposed part and the first block defines a third fold line, the superimposed part is folded along the third fold line, and the first surface Overlay on the first block; the two sides of the refolded part are adjacent to the superimposed part and the second block respectively, the refolded part includes the second surface and the opposite second bottom surface, and the connection between the refolded part and the superimposed part is determined The fourth fold line is defined, the reverse fold portion is folded along the fourth fold line, the second bottom surface is overlaid on the first bottom surface, and the connection between the reverse fold portion and the second block defines the fifth fold line, and the second block is along the fifth The fold line folds and lies on a different plane from the reverse fold. The first polyline, the second polyline, the third polyline, the fourth polyline, and the fifth polyline are connected to the intersection, and one side line of the superimposed portion is connected to the outer edge line of the anti-folded portion or the outer edge line of the first block. At the connection point.

As in the above-mentioned reflecting sheet structure, in an embodiment, the fifth fold line and the third fold line are mirror-symmetrical with the fourth fold line as a mirror image.

As in the above-mentioned reflective sheet structure, in one embodiment, the reverse folding portion is folded along the fifth folding line, and the second bottom surface is overlaid on the back surface of the second block; the overlapping portion is folded along the fourth folding line, and the first surface is folded. It is relatively overlapped with the second surface, wherein the first polyline, the second polyline, the third polyline, the fourth polyline, and the fifth polyline are connected to the intersection.

As in the above-mentioned reflective sheet structure, in one embodiment, the superimposed portion is folded along the third fold line, and the first bottom surface is overlaid on the back of the first block; the reverse folded portion is folded along the fourth fold line, and the first surface is folded. It is relatively overlapped with the second surface, wherein the first polyline, the second polyline, the third polyline, the fourth polyline, and the fifth polyline are connected to the intersection.

As in the above-mentioned reflective sheet structure, in one embodiment, the superimposed portion is folded along the fourth fold line, and the first surface is overlapped on the second surface; the first block is folded along the third fold line, and the first block The back surface of the cover is stacked on the first bottom surface, wherein the first fold line, the second fold line, the third fold line, the fourth fold line, and the fifth fold line are connected to the intersection point.

As in the above-mentioned reflecting sheet structure, in one embodiment, the superimposed portion is folded along the third fold line, and the first surface is overlaid on the surface of the first block; the reverse folded portion is folded along the fourth fold line, and the second The bottom surface is stacked on the first bottom surface, wherein the first fold line, the second fold line, the third fold line, and the fourth The polyline and the fifth polyline are connected to the intersection.

The invention also provides a backlight module according to an embodiment, which includes a back cover shell and the above-mentioned reflection sheet structure. The casing includes an accommodating space, and the reflecting sheet structure is disposed in the accommodating space and is attached to the outer surface of the back cover casing.

Through one or more of the above embodiments, the reflection sheet is folded to improve the connection problem of the inclined surfaces corresponding to the two sides of the corner of the casing, so as to prevent the shadow phenomenon from becoming more serious due to poor splicing. In addition, in one embodiment, the reflection sheet structure is designed in a folded manner, which can enhance the thickness and hardness of the reflection sheet, fill the gap between the reflection sheet and the casing, avoid the use of filling consumables, and reduce manufacturing costs.

100‧‧‧ backlight module

1‧‧‧Reflector structure

11‧‧‧ Block 1

111‧‧‧ outside line

12‧‧‧ Block 2

13‧‧‧Body Block

14‧‧‧ Collapsed

141‧‧‧ Overlay

141a‧‧‧first surface

141b‧‧‧First underside

1411‧‧‧Sideline

142‧‧‧Reflex section

1421‧‧‧Outer edge

142a‧‧‧Second surface

142b‧‧‧Second bottom surface

2‧‧‧back cover shell

2a‧‧‧accommodation space

3‧‧‧ intersection

4‧‧‧ connection point

L1‧‧‧First Polyline

L2‧‧‧Second Polyline

L3‧‧‧ Third Polyline

L4‧‧‧ Fourth Polyline

L5‧‧‧ Fifth Polyline

α‧‧‧ Angle

[FIG. 1] It is a partial schematic diagram of the first embodiment of the structure of the reflective sheet of the present invention.

[FIG. 2] It is a partial schematic diagram of a second embodiment of the structure of the reflection sheet of the present invention.

3A is a schematic diagram of a use state of one of the embodiments shown in FIG. 1.

3B is a schematic diagram of another use state of the embodiment shown in FIG. 1.

4A is a schematic diagram of a use state of one of the embodiments shown in FIG. 2.

4B is a schematic diagram of another use state of the embodiment shown in FIG. 2.

[FIG. 5] It is a partial schematic diagram of a third embodiment of the structure of the reflection sheet of the present invention.

6A is a schematic diagram of a use state of one of the embodiments shown in FIG. 5.

6B is a schematic diagram of another use state of the embodiment shown in FIG. 5.

[Fig. 7] An exploded view of an embodiment of the backlight module of the present invention.

Please refer to FIG. 1 and FIG. 2, which are partial schematic diagrams of the first embodiment and the second embodiment of the reflective sheet structure 1 of the present invention, respectively. The reflection sheet structure 1 includes a body block 13, a first block 11, a second block 12, and a folded block 14.

In the first embodiment and the second embodiment, the reflection sheet structure 1 is centered on the body block 13, and has a first block 11 opposite to a second block 12. As shown in FIGS. 1 and 2, the first block 11 extends from the body block 13, and the connection point with the body block 13 defines a first polyline L1; the second block 12 extends from the body block 13 and the body region The connection of the block 13 defines a second polyline L2. The first fold line L1 is adjacent to the second fold line L2, and the first fold line L1 and the second fold line L2 are not parallel.

As shown in FIGS. 1 and 2, the folded block 14 is located between the first block 11 and the second block 12. The folded block 14 includes a superimposed portion 141 and a refolded portion 142. The superimposing portion 141 is adjacent to the first block 11, and a connection point between the superimposing portion 141 and the first block 11 defines a third polyline L3. The two sides of the refolded portion 142 are adjacent to the superimposed portion 141 and the second block 12, respectively. The junction of the refolded portion 142 and the superimposed portion 141 defines a fourth fold line L4, and the junction of the refolded portion 142 and the second block 12 Define the fifth polyline L5. The third fold line L3 and the fourth fold line L4 form an included angle α along the extending direction toward the body block 13. In the first embodiment, the fifth fold line L5 corresponds to a slot structure between two adjacent sides of the back cover of the applied backlight module (see FIGS. 3A and 3B). In the second embodiment, the side line 1411 of one side of the superimposed portion 141 and the outer edge line 1421 of the folded-back portion 142 are connected to the connection point 4 and exposed outward, as shown in FIG. 2, which is different from the first embodiment. No notch shape is formed at the corners.

The reflective sheet structure 1 of the above embodiment is installed in, for example, a backlight module, and can be folded and filled in the corners of the back cover of the backlight module without cutting and flattening. The gap between the sides. In this way, the problem of corner shadows can be solved.

As shown in FIG. 1 and FIG. 2, in the reflection sheet structure 1 of the first embodiment and the second embodiment, the difference is that the folded parts are different. As shown in FIG. 1, for the reflection sheet structure 1 of the first embodiment, the superimposed portion 141 is located at a corner. As shown in FIG. 2, for the second embodiment, the superimposed portion 141 is not positioned at a corner. That is to say, the present invention does not limit the position of the folded block 14 on the reflective sheet, depending on the structural requirements of the operator or user, and adopts different embodiments.

As shown in the embodiment shown in FIG. 1, the fifth fold line L5 and the third fold line L3 are mirror symmetrical with the fourth fold line L4 as a mirror image. Thus, in some embodiments, the operator or user may choose to use the third fold line L3 or the fifth fold line L5 as a fold line corresponding to the slot structure between two adjacent sides of the back cover of the applied backlight module.

Please refer to FIG. 3A and refer to FIG. 1. FIG. 3A is a schematic diagram of a use state of the embodiment shown in FIG. 1. The reflection sheet structure 1 is used in a backlight module, and the reflection sheet structure 1 is attached to the back cover housing 2. The superposed portion 141 of the reflective sheet structure 1 includes a first surface 141a and an opposite first bottom surface 141b. The superposed portion 141 is folded along a third fold line L3, so that the first surface 141a is superposed on the first block 11; 142 includes a second surface 142a and an opposite second bottom surface 142b. The reverse folding portion 142 is folded along the fourth fold line L4, so that the second bottom surface 142b is overlaid on the first bottom surface 141b, and the first fold line L1 and the second fold line L2 The third fold line L3, the fourth fold line L4, and the fifth fold line L5 are connected to the intersection point 3 to form a concave corner structure corresponding to the corner of the back cover housing 2.

Please refer to FIG. 3B and FIG. 1. FIG. 3B is a schematic diagram of another use state of the embodiment shown in FIG. 1. The difference from the embodiment shown in FIG. 3A is that the folding manner and position of the folding block 14 are different. In this embodiment, the refolded portion 142 is folded along the fifth fold line L5, so that the second bottom surface 142b is overlaid on the back surface of the second block 12. The stacking portion 141 is folded along the fourth fold line L4, so that the first surface is folded. 141a overlaps with the second surface 142a, and the second bottom surface is the outermost surface 142b, at this time, the first fold line L1, the second fold line L2, the third fold line L3, the fourth fold line L4, and the fifth fold line L5 are connected to the intersection 3, and form a concave corner structure corresponding to the corner of the back cover shell 2. That is, in the structure of FIG. 3B, the folding block 14 is folded between the back cover shell 2 and the reflective sheet structure 1, rather than in the accommodation space formed after the reflective sheet structure 1 is folded, The flatness of the reflecting surface can be maintained, and no protruding structure is formed on the reflecting surface.

Please refer to FIG. 4A and refer to FIG. 2. FIG. 4A is a schematic diagram of a use state of the embodiment shown in FIG. 2. The reflection sheet structure 1 is also applied to the backlight module and is attached to the back cover housing 2. In this embodiment, similar to the folding method of the first embodiment, the overlapping portion 141 is folded along the third fold line L3, so that the first surface 141a is overlaid on the first block 11; the reverse folding portion 142 includes the second surface 142a and the opposite second bottom surface 142b, the reverse folding portion 142 is folded along the fourth fold line L4, so that the second bottom surface 142b is overlaid on the first bottom surface 141b, and the first fold line L1, the second fold line L2, and the third fold line L3 The fourth fold line L4 and the fifth fold line L5 are connected to the intersection point 3 to form a concave corner structure corresponding to the corner of the back cover housing 2.

Please refer to FIG. 4B and FIG. 2. FIG. 4B is a schematic diagram of another use state of the embodiment shown in FIG. 2. The difference from the embodiment shown in FIG. 4A is that the folding method and position of the folding block 14 are different. In this embodiment, the overlapping portion 141 is folded along the third fold line L3, so that the first bottom surface 141b is overlaid on the back of the first block; the reverse folding portion 142 is folded along the fourth fold line L4, so that the first surface 141a is folded It is relatively overlapped with the second surface 142a, and the outermost surface is the second bottom surface 142b. Similarly, at this time, the first polyline L1, the second polyline L2, the third polyline L3, the fourth polyline L4, and the fifth polyline L5 is connected to the intersection 3 and forms a concave corner structure corresponding to the corner of the back cover shell 2. In the structure of FIG. 4B, the folding block 14 is also folded between the back cover shell 2 and the reflective sheet structure 1.

Please refer to FIG. 5, FIG. 6A to FIG. 6B, and FIG. 5 is a partial schematic diagram of a third embodiment of the reflective sheet structure 1 of the present invention. FIG. 6A is a schematic diagram of a use state of the embodiment shown in FIG. 5. FIG. 6B is a schematic diagram of another use state of the embodiment shown in FIG. 5. The difference between the reflective sheet structure 1 of the third embodiment and the reflective sheet structure 1 of the second embodiment is that the third fold line L3 and the fourth fold line L4 are offset to the reverse folding portion 142. And in the third embodiment, the side line 1411 of the superimposing portion 141 and the outer line 111 of the first block are connected to the connection point 4 and are exposed outward.

As shown in FIG. 6A, in this embodiment, the superimposing portion 141 is folded along the fourth fold line L4, so that the first surface 141a overlaps the second surface 142a; the first block 11 is along the third fold line along L3 Folded so that the back surface of the first block 11 overlaps the first bottom surface 141b. At this time, the first fold line L1, the second fold line L2, the third fold line L3, the fourth fold line L4, and the fifth fold line L5 are connected to the intersection 3, and can form a concave corner structure corresponding to the corner of the back cover shell 2.

Next, as shown in FIG. 6B, in this embodiment, the overlapping portion 141 is folded along the third fold line L3, so that the first surface 141a is overlaid on the surface of the first block 11; the reverse folding portion 142 is along the fourth The folding line is folded along L4, so that the second bottom surface 142b is overlaid on the first bottom surface 141b. At this time, the first fold line L1, the second fold line L2, the third fold line L3, the fourth fold line L4, and the fifth fold line L5 are connected to the intersection 3, and can form a concave corner structure corresponding to the corner of the back cover shell 2. In the structure of FIG. 6B, the folding block 14 is also folded between the back cover shell 2 and the reflective sheet structure 1.

According to the above embodiments, it can be known that the reflective sheet structure 1 of the present invention has a variety of usage patterns, and the operator or user chooses to adopt it according to the required application design. The present invention is not limited.

The above-mentioned reflecting sheet structure 1 is different from the prior art in that the gap between adjacent sides of the back cover shell 2 is filled with the folding block 14 through the folding method, thereby improving the problem of shadows. real In fact, the four corners of the reflective sheet structure 1 in this case are not cut to remove the triangular blocks, so there is no problem of poor splicing of adjacent side sheets. In addition, the reflective sheet structure 1 can be closely adhered to the back cover, and it does not need to add additional padding or adhesive material to fill the gap between the reflective sheet and the back cover shell 2, thereby reducing manufacturing costs.

Please refer to FIG. 7, which is an exploded view of an embodiment of the backlight module 100 according to the present invention. The backlight module 100 includes a back cover housing 2 and the above-mentioned reflective sheet structure 1. For a state in which the housing 2 and the reflective sheet structure 1 are arranged together, please refer to FIGS. 3A to 6B again.

As shown in FIG. 7, the back cover housing 2 includes an accommodating space 2 a, and the reflecting sheet structure 1 is disposed in the accommodating space 2 a and is attached to the outer surface of the back cover housing 2. With the combination of the back cover shell 2 and the reflection sheet structure 1, the reflection sheet does not have the problem of generating gaps when the back cover shell 2 is cut and flattened, and the problem of shadows can be improved.

In addition, the reflective sheet structure 1 is affixed to the back cover shell 2, and no additional filling material is required to fill the gap between the reflective sheet structure 1 and the back cover shell 2 during the manufacturing process.

In the above drawings, for the sake of clarity, the thickness of the reflection sheet structure and the back cover shell and the like are enlarged. In the description, the same drawing reference numerals indicate the same elements. It should be understood that when an element such as a body block, a first block, a second block, or a folded block (superimposed or reflexed) is referred to as being "on" or "connected to" another element An element may be directly on or connected to another element, or an intermediate element may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, it means that there are no intervening elements present.

Through one or more of the above embodiments, the reflective sheet has a folding structure, which can improve the problem of the connection between the corners corresponding to the two sides of the back cover shell, and improve the serious shadows encountered by the prior art. problem. In an embodiment, the folding method is used to increase the thickness and hardness of the corners of the reflective sheet structure. Therefore, the use of adhesive or extra padding can be avoided or reduced to fill the gap between the back cover shell and the reflective sheet. Clearance, reducing manufacturing costs. In another embodiment, there is a slight gap between the reflective sheet and the back cover shell at the corner. Because the reflective sheet has a folded structure and its inner surface is still a reflective surface that can reflect light, the light will pass through the back cover Absorbed by the body, improving the problem of producing shadows.

Claims (7)

A reflective sheet structure includes: a body block; a first block extending from the body block; and a connection between the first block and the body block defines a first polyline; a second block Extending to the body block, and a second polyline is defined at the connection between the second block and the body block, wherein the first polyline is adjacent to the second polyline, and the first polyline is connected to the first polyline The bi-fold line is not parallel; and a folded block is located between the first block and the second block, the folded block includes: a superimposed portion, adjacent to the first block, the superimposed portion and A connection point of the first block defines a third fold line; and a reverse fold portion, two sides of which are adjacent to the superimposed portion and the second block, respectively, and a connection point of the reverse fold portion and the superimposed portion defines a fourth A polyline, a fifth polyline is defined at the connection between the reverse-folded portion and the second block, wherein a side edge of the superposed portion and an outer edge line of the reverse-folded portion or an outer edge of the first block Connected to a connection point and exposed outward. A reflective sheet structure includes: a body block; a first block extending from the body block; and a connection between the first block and the body block defines a first polyline; a second block Extending to the body block, and a second polyline is defined at the connection between the second block and the body block, wherein the first polyline is adjacent to the second polyline, and the first polyline is connected to the first polyline The bi-fold line is not parallel; and a folded block is located between the first block and the second block, the folded block includes: a superimposed part, adjacent to the first block, the superimposed part contains A first surface and a first bottom surface opposite to each other, a third fold line is defined at a connection between the superimposed portion and the first block, the superimposed portion is folded along the third fold line, and the first surface is overlaid on On the first block; and a rebend portion, two sides of which are adjacent to the superimposed portion and the second block, respectively, the rebend portion includes a second surface and an opposite second bottom surface, the rebend portion and A fourth fold line is defined at a connection portion of the superimposed portion, the reverse fold portion is folded along the fourth fold line, and the second bottom surface overlaps On the first bottom surface, a fifth fold line is defined at a connection between the reflex portion and the second block, and the second block is folded with the fifth fold line and is located on a different plane from the reflex portion; wherein, The first fold line, the second fold line, the third fold line, the fourth fold line, and the fifth fold line are connected to an intersection, wherein a side line of the superposed portion and an outer edge line of the reverse fold portion or An outer edge of the first block is connected to a connection point and is exposed outward. The reflective sheet structure according to claim 2, wherein the reverse folding portion is folded along the fifth fold line, and the second bottom surface is overlaid on the back of the second block; the overlapping portion is folded along the fourth fold line The first surface and the second surface overlap each other, wherein the first fold line, the second fold line, the third fold line, the fourth fold line, and the fifth fold line are connected to the intersection. The reflective sheet structure according to claim 2, wherein the superposed portion is folded along the third fold line, and the first bottom surface is overlaid on the back of the first block; the reverse folded portion is folded along the fourth fold line The first surface and the second surface overlap each other, wherein the first fold line, the second fold line, the third fold line, the fourth fold line, and the fifth fold line are connected to the intersection. The reflective sheet structure according to claim 2, wherein the superimposed portion is folded along the fourth fold line, and the first surface is overlaid on the second surface; the first block is folded along the third fold line The back surface of the first block is overlaid on the first bottom surface, wherein the first polyline, the second polyline, the third polyline, the fourth polyline, and the fifth polyline are connected to the intersection. The reflective sheet structure according to claim 2, wherein the superposed portion is folded along the third fold line, the first surface is overlaid on the surface of the first block, and the reverse folded portion is turned along the fourth fold line. Fold, the second bottom surface is overlaid on the first bottom surface, wherein the first fold line, the second fold line, the third fold line, the fourth fold line and the fifth fold line are connected to the intersection. A backlight module includes: a back cover housing including an accommodating space; and the reflective sheet structure according to any one of claims 2 to 6 disposed in the accommodating space and attaching the back cover shell The outer surface of the body.