TW202016575A - 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 the first fold line is defined at the joint; the second block is connected to the body block, and the second fold line is defined at the joint, wherein the first fold line is adjacent to the second fold line, and the first The fold line is not parallel to the second fold line. The folding block is located between the first block and the second block, and the folding block includes an superimposed portion and a reverse folding portion. The superimposed portion is adjacent to the first block, and the third fold line is defined at the junction of the superimposed portion and the first block; the two sides of the reverse folded portion are adjacent to the superimposed portion and the second block respectively, and the connection between the reverse folded portion and the superimposed portion is defined the fourth fold line, and the fifth fold line is defined at the junction of the reverse fold portion and the second block.

Description

Reflective sheet structure and backlight module with the same

A reflective sheet structure, especially a reflective sheet with a folded structure and a backlight module with the reflective sheet.

In the traditional direct-lit light box, the backlight mold is assembled with a reflective sheet, and the light emitted backward is reflected forward to increase the light extraction efficiency by the reflection principle. With the development of technology, under the trend of light and thin light boxes, the light mixing distance in the light box will become shorter and shorter, and at the same time, the related optical characteristics are 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 block, so that the original four sides of the reflective sheet form four foldable side sheets. After the edges of the side sheets are connected to each other, the shape of the reflective sheet Matching the accommodating area inside the back cover, it is flatly attached to the inside of the back cover to form a direct type backlight module. Usually, there is a corner shadow phenomenon in the four corners of the direct backlight module. The reason for this is that the light path from the light emitting unit to the corner is far away, and the two corresponding side panels of the corner corresponding to the back cover are poorly spliced and appear unsuccessful. The problem of reflection sheet coverage, if poor splicing will make the corner shadow of the backlight module more serious. Therefore, between the reflective sheet and the back cover, an additional reflective sheet needs to be added to fill the joint between the two adjacent side sheets.

In addition, because the hardness and thickness characteristics of the reflective sheet are reflected in the manufacturing cost, under the consideration of manufacturing, it is bound to choose between the thickness and flatness of the reflective sheet. If the hardness is not good, additional padding will be required. Or plastic materials to fill the gap between it and the back panel of the light box, which will also cause an increase in production costs.

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 to the body block defines a first polyline; the second block connects to the body block, and the connection to the body block defines a second polyline, where the first polyline and the second polyline Adjacent, 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 an overlapping portion and an inverting portion. The superimposed portion is adjacent to the first block, and the connection between the superimposed portion and the first block defines a third fold line; the two sides of the anti-folded portion are adjacent to the superimposed portion and the second block, respectively A fourth fold line is defined, and the connection between the reverse fold and the second block defines a fifth fold line.

As described above for the reflector structure, in an embodiment, the fifth fold line and the third fold line are mirror-symmetrical with the fourth fold line.

The present invention also proposes a reflector structure according to an embodiment. The difference from the above embodiment is that the folded block is located between the first block and the second block. The folded block includes an overlapping portion and an inverting portion. The superimposed portion is adjacent to the first block. The superimposed portion includes a first surface and an opposite first bottom surface. The connection between the superimposed portion and the first block defines a third fold line. The superimposed portion is folded along the third fold line. The first surface Overlay on the first block; the two sides of the anti-folded part are adjacent to the superimposed part and the second block respectively. The anti-folded part includes the second surface and the opposite second bottom surface. The four-fold line, the reverse-folded part is folded along the fourth-folded line, the second bottom surface is overlaid on the first bottom surface, and the junction of the reversed-folded portion and the second block defines a fifth fold line, and the second block is turned along the fifth fold line The folds and the reverse folds are on different planes. The first polyline, the second polyline, the third polyline, the fourth polyline and the fifth polyline are connected to the intersection point.

As described above for the reflector structure, in an embodiment, the fifth fold line and the third fold line are mirror-symmetrical with the fourth fold line.

As in the reflective sheet structure described above, in one embodiment, the reversed portion may be 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 The second surface is relatively superposed, 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 reflective sheet structure described above, in one embodiment, the superimposed portion may be folded along the third fold line, and the first bottom surface overlaps the back of the first block; the reversed portion may be folded along the fourth fold line, and the first surface The second surface is relatively superposed, 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 reflective sheet structure described above, in one embodiment, the superimposed portion may be folded along the fourth fold line, and the first surface overlaps the second surface; the first block may be folded along the third fold line, and the first block The back surface of 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 reflective sheet structure described above, in one embodiment, the superimposed portion may be folded along the third fold line, and the first surface overlaps the surface of the first block; the reversed portion may be folded along the fourth fold line, and the second The bottom surface overlaps 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.

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

Through one or more of the above-mentioned embodiments, the problem of the convergence of the inclined surfaces corresponding to the two sides of the corners of the housing is improved through the folding of the reflective sheet to avoid the shadow phenomenon from becoming more serious due to poor splicing. In addition, in one embodiment, designing the reflective sheet structure in a folded manner can enhance the thickness and hardness of the reflective sheet, fill the gap between the reflective sheet and the housing, avoid increasing the use of filling consumables, and reduce manufacturing costs.

Please refer to FIGS. 1 and 2, which are partial schematic diagrams of the first embodiment and the second embodiment of the reflective sheet structure 1 of the present invention. The reflector 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 reflective sheet structure 1 is centered on the body block 13 and has a first block 11 opposite to a second block 12 opposite. As shown in FIGS. 1 and 2, the first block 11 extends from the body block 13, and the connection with the body block 13 defines a first fold line L1; the second block 12 extends from the body block 13 and the body area The junction of 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 an overlapping portion 141 and an inverse folding portion 142. The superimposing portion 141 is adjacent to the first block 11, and the junction of the superimposing portion 141 and the first block 11 defines a third fold line L3. The two sides of the reflexed portion 142 are respectively adjacent to the superimposed portion 141 and the second block 12, the connection between the reflexed portion 142 and the superimposed portion 141 defines a fourth fold line L4, and the connection between the reflexed 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 angle α along the extending direction toward the body block 13. In the first embodiment, the fifth fold line L5 corresponds to the slot structure between the adjacent side surfaces of the back cover 2 of the applied backlight module (see FIGS. 3A and 3B ).

Through the reflective sheet structure 1 of the above embodiment, installed in a backlight module, for example, the folding block 14 can be folded without cutting or spreading to fill the second connection in the corner of the back cover of the backlight module The gap between the sides. In this way, the problem of shadows in corners can be solved.

As shown in FIGS. 1 and 2, in the reflective sheet structure 1 of the first embodiment and the second embodiment, the difference is that the folded portions are different. As shown in FIG. 1, for the reflective sheet structure 1 of the first embodiment, the superimposed portion 141 is located at the corner. As shown in FIG. 2, for the second embodiment, the superposition section 141 is not located at the 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, different embodiments are used.

In the embodiment shown in FIG. 1, the fifth fold line L5 and the third fold line L3 are mirror-symmetric with the fourth fold line L4. As such, in some embodiments, the operator or the user may select the third fold line L3 or the fifth fold line L5 as the fold line corresponding to the slot structure between the adjacent side surfaces of the back cover of the backlight module to be applied.

Please refer to FIG. 3A and refer to FIG. 1 as well. FIG. 3A is a schematic view of one of the embodiments shown in FIG. 1 in use. The reflective sheet structure 1 is applied in the backlight module, and the reflective sheet structure 1 is attached to the back cover housing 2. The superimposed portion 141 of the reflective sheet structure 1 includes a first surface 141a and an opposing first bottom surface 141b. The superimposed portion 141 is folded along a third fold line L3 so that the first surface 141a overlaps the first block 11; 142 includes a second surface 142a and an opposite second bottom surface 142b. The reversed portion 142 is folded along the fourth fold line L4 so that the second bottom surface 142b overlaps 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, forming a concave corner structure corresponding to the corner of the back cover case 2.

Please refer to FIG. 3B and refer to FIG. 1 as well. FIG. 3B is another schematic view of the embodiment shown in FIG. 1 in use. The difference from the embodiment shown in FIG. 3A is that the folding method and position of the folding block 14 are different. In this embodiment, the reverse fold 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 overlapping portion 141 is folded along the fourth fold line L4, so that the first surface 141a and the second surface 142a are relatively superposed, and the outermost surface is the second bottom 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 point 3 also forms a concave corner structure corresponding to the corner of the back cover shell 2. That is to say, in the structure of FIG. 3B, the folding block 14 is folded between the back cover case 2 and the reflective sheet structure 1, not in the accommodating space formed after the reflective sheet structure 1 is folded, And the flatness of the reflecting surface can be maintained without forming a protruding structure on the reflecting surface.

Please refer to FIG. 4A, and refer to FIG. 2 as well. FIG. 4A is a schematic view of a use state of one of the embodiments shown in FIG. 2. The reflective sheet structure 1 is also used in the backlight module and attached to the back cover housing 2. In this embodiment, similar to the folding method of the first embodiment, the superimposed portion 141 is folded along the third fold line L3, so that the first surface 141a overlaps the first block 11; the reversed portion 142 includes the second surface 142a and the opposite second bottom surface 142b, the reverse folded portion 142 is folded along the fourth fold line L4, so that the second bottom surface 142b overlaps 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 case 2.

Please refer to FIG. 4B and refer to FIG. 2 as well. 4B is another schematic view of the embodiment shown in FIG. 2 in use. 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 surface of the first block; the reversed portion 142 is folded along the fourth fold line L4, so that the first surface 141a The second bottom surface 142b is relatively overlapped with the second surface 142a, and the second bottom surface 142b is the same. 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 is connected to the intersection point 3 to form a concave corner structure corresponding to the corner of the back cover case 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 view of the third embodiment of the reflective sheet structure 1 of the present invention. FIG. 6A is a schematic view of one of the embodiments shown in FIG. 5 in use. 6B is another schematic view of the embodiment shown in FIG. 5 in use. 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 shifted toward the reverse fold portion 142.

As shown in FIG. 6A, in this embodiment, the overlapping 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 Fold, 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 point 3, and can also form a concave corner structure corresponding to the corner of the back cover case 2.

Next, as shown in FIG. 6B, in this embodiment, the superimposed portion 141 is folded along the third fold line L3, so that the first surface 141a overlaps the surface of the first block 11; the reversed portion 142 is along the fourth The fold line is folded along L4 so that the second bottom surface 142b 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 point 3, and can also form a concave corner structure corresponding to the corner of the back cover case 2. In the structure of FIG. 6B, the folding block 14 is also folded between the back cover housing 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 usages, and the manufacturer or the user chooses to use it according to the required application design, and the present invention is not limited.

The reflective sheet structure 1 described above is different from the prior art in that the folding block 14 is used to fill the gaps between the adjacent side surfaces of the back cover housing 2 by folding to improve the shadow problem. In fact, the four corners of the reflective sheet structure 1 in this case are not trimmed to remove triangular blocks, so there will be no problem of poor splicing of adjacent side sheets. In addition, the reflective sheet structure 1 can be closely adhered to the back cover, which does not require additional padding material or glue material to fill the gap between the reflective sheet and the back cover housing 2 to reduce the manufacturing cost.

Please refer to FIG. 7, which is an exploded view of an embodiment of the backlight module 100 of the present invention. The backlight module 100 includes a back cover case 2 and the reflective sheet structure 1 described above. For a state where the case 2 and the reflective sheet structure 1 are arranged in combination, 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 reflective 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 case 2 and the reflective sheet structure 1, the reflective sheet will not have the problem of voids when the back cover case 2 is cut and flattened, and the problem of dark shadows can be improved.

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

In the above drawings, for the sake of clarity, the thickness of the reflection sheet structure, the back cover case, etc. are enlarged. In the description, the same drawing symbols 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 part or reversed part) is referred to as being "on" or "connected" to another element In the case of an element, it 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.

Through one or more of the above embodiments, the reflective sheet has a folded structure, which can improve the problem of the connection between the corners corresponding to the inclined surfaces of the back cover shell and the problem of serious shadows encountered in the prior art. In one embodiment, the folding method is used to enhance the thickness and hardness of the corners of the reflective sheet structure. Therefore, it is possible to avoid using or reducing the use of adhesive or additional padding materials to fill the gap between the back cover shell and the reflective sheet The gap reduces the manufacturing cost. In another embodiment, there is a slight gap between the reflective sheet at the corner and the back cover case. Because the reflective sheet has a folded structure and its inner surface is still a reflective surface that can reflect light, the light will be emitted by the back cover case Absorbed by the body to improve the problem of producing shadows.

100: backlight module 1: reflective sheet structure 11: first block 12: second block 13: body block 14: folded block 141: superimposed part 141a: first surface 141b: first bottom surface 142: reverse folding Part 142a: Second surface 142b: Second bottom surface 2: Back cover case 2a: Accommodating space 3: Intersection point L1: First polyline L2: Second polyline L3: Third polyline L4: Fourth polyline L5: Fifth Polyline α: included angle

[FIG. 1] It is a partial schematic view of the first embodiment of the reflective sheet structure of the present invention. [FIG. 2] It is a partial schematic view of the second embodiment of the reflective sheet structure of the present invention. [Fig. 3A] This is a schematic view of one of the embodiments shown in Fig. 1 in use. [FIG. 3B] This is another schematic view of the embodiment shown in FIG. 1. FIG. [FIG. 4A] It is a schematic view of a use state of one of the embodiments shown in FIG. 2. [FIG. 4B] It is another schematic view of the use state of the embodiment shown in FIG. [FIG. 5] It is a partial schematic view of the third embodiment of the reflective sheet structure of the present invention. [Fig. 6A] This is a schematic view of one of the embodiments shown in Fig. 5 in use. [Fig. 6B] It is another schematic view of the use state of the embodiment shown in Fig. 5. [FIG. 7] It is an exploded schematic view of an embodiment of the backlight module of the present invention.

1: Reflector structure

11: The first block

12: Block 2

13: Ontology block

14: collapse block

141: Superposition

141a: first surface

142: Reflexion

142a: Second surface

L1: First polyline

L2: Second polyline

L3: Third polyline

L4: Fourth polyline

L5: Fifth polyline

α: included angle

Claims (9)

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 the connection between the second block and the body block defines a second fold line, wherein the first fold line is adjacent to the second fold line, and the first fold line and the first The two-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 The connection point of the first block defines a third fold line; and an anti-folding part, both sides of which are adjacent to the superimposing part and the second block respectively, and the connection point of the anti-folding part and the superimposing part defines a fourth A fold line, the connection between the reversal part and the second block defines a fifth fold line. The reflective sheet structure according to claim 1, wherein the fifth fold line and the third fold line are mirror symmetry with the fourth fold line. 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 the connection between the second block and the body block defines a second fold line, wherein the first fold line is adjacent to the second fold line, and the first fold line and the first The two-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 includes A first surface and an opposite first bottom surface, the connection between the superimposed portion and the first block defines a third fold line, the superimposed portion is folded along the third fold line, and the first surface is overlaid On the first block; and a reflexed portion, both sides of which are adjacent to the superimposed portion and the second block, the reflexed portion includes a second surface and a second bottom surface opposite, the reflexed portion and The connection point of the superposition part defines a fourth fold line, the reverse fold part is folded along the fourth fold line, the second bottom surface overlaps the first bottom surface, and the connection point of the reverse fold part and the second block A fifth fold line is defined, and the second block is folded with the fifth fold line and is located on a different plane from the reverse fold; wherein, the first fold line, the second fold line, the third fold line, the fourth fold line and The fifth polyline is connected to an intersection point. The reflective sheet structure according to claim 3, wherein the reversal portion is folded along the fifth fold line, the second bottom surface is overlaid on the back surface of the second block; the overlapping portion is turned along the fourth fold line Fold, the first surface and the second surface are relatively superposed, 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. The reflective sheet structure according to claim 3, wherein the overlapping portion is folded along the third fold line, the first bottom surface is overlaid on the back surface of the first block, and the reverse folded portion is turned along the fourth fold line Fold, the first surface and the second surface are relatively superposed, 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. The reflective sheet structure according to claim 3, wherein the fifth fold line and the third fold line are mirror-symmetrical with the fourth fold line. The reflective sheet structure according to claim 3, wherein the overlapping portion is folded along the fourth fold line, 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 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. The reflective sheet structure according to claim 3, wherein the overlapping portion is folded along the third fold line, the first surface is overlaid on the surface of the first block; the reverse folded portion is turned along the fourth fold line Fold, the second bottom surface overlaps 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. A backlight module, comprising: a back cover case including a receiving space; and the reflective sheet structure according to any one of claims 3 to 8, provided in the receiving space and attached to the back cover case The outer surface of the body.

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