CN108445674A - Flexible light-emitting module, backlight module and display device - Google Patents

Abstract

The present invention relates to a flexible light-emitting module, a backlight module and a display device. The flexible light-emitting module includes a flexible substrate and a plurality of light-emitting elements. The flexible substrate has a first side, a second side opposite to the first side and a first cutting line. The first cutting line extends from the first side to the second side to form a plurality of first protrusions arranged staggered on both sides of the first cutting line in the extending direction of the first cutting line. The light-emitting elements are arranged on the flexible substrate, and the light-emitting elements are arranged corresponding to the first protrusions.

Description

Flexible light emitting module, backlight module and display device

technical field

The present invention relates to a light-emitting module, a backlight module and a display device, and in particular to a flexible light-emitting module, a backlight module with the flexible light-emitting module and a display device using the backlight module.

Background technique

Since the liquid crystal in the liquid crystal display device does not emit light itself, the light source required for display is usually provided by adding a backlight module. A backlight module is generally composed of a light emitting module and a light guide plate, wherein the light emitting module is formed by disposing light emitting elements on a long substrate. Generally speaking, such a strip-shaped light-emitting module is called a light bar, and the maximum size of the light bar is usually limited by the size of the substrate.

However, in a large-sized display device, since the length of the long side is much larger than the size of the light bar, and because the size of the light bar is limited, or a single light bar cannot effectively load all the light-emitting elements, it is often necessary to pass through several The light strips of the strips form the backlight module. However, the utilization of layout in such a configuration is poor, and is greatly affected by the size of the light bar. Therefore, how to improve the typesetting utilization rate of the light bar and reduce the limitation caused by the size of the light bar has become an urgent problem to be solved.

Contents of the invention

The invention provides a flexible light-emitting module, which has better layout utilization rate, and the size of the light-emitting module is less limited by the size of the substrate.

The invention provides a backlight module, which can have a larger size, and the included light emitting module has better layout efficiency, and the size of the light emitting module is less limited by the size of the substrate.

The present invention provides a display device, which can be a large-sized display device, and the included light-emitting module has better layout efficiency, and the size of the light-emitting module is less limited by the size of the substrate.

The flexible light-emitting module of the present invention includes a flexible substrate and a plurality of light-emitting elements. The flexible substrate has a first side, a second side opposite to the first side, and a first cutting line. The first cutting line extends from the first side to the second side, so as to form a plurality of first protrusions arranged alternately on both sides of the first cutting line along the extending direction of the first cutting line. The light emitting element is arranged on the flexible substrate, and the light emitting element is arranged corresponding to the first protruding part.

The flexible light-emitting module of the present invention includes a flexible substrate and a plurality of light-emitting elements. The flexible substrate has a plurality of first protrusions, a first surface and a second surface opposite to the first surface. The flexible substrate includes a first element area, a second element area and a first inflection area. The first element area has a first side and a second side opposite to the first side, wherein part of the first protruding portion is located on the first side. The second element area has a third side and a fourth side opposite to the third side, wherein part of the first protruding portion is located on the third side, and the outline of the third side corresponds to the outline of the first side. The first inflection area is connected between the first element area and the second element area. The light emitting element is arranged on the first surface of the flexible substrate, and the light emitting element is arranged corresponding to the first protrusion.

The backlight module of the present invention includes a light guide plate and the above-mentioned flexible light emitting module. Wherein in the flexible light-emitting module, the first surface located in the first element area and the first surface located in the second element area face the light guide plate.

The display device of the present invention includes the above-mentioned backlight module and a display element layer. Wherein the display element layer is configured on the backlight module.

Based on the above, the flexible light-emitting module of the present invention uses the flexible substrate as the base material, and after the flexible substrate is cut and folded, the flexible light-emitting module can be converted from the folded state to the unfolded state, Therefore, the size of the flexible light-emitting module is not limited by the size of the substrate. In addition, the flexible light-emitting module of the present invention forms a plurality of protruding parts interlaced on both sides of the cutting line in the extending direction of the cutting line, and the light-emitting elements are arranged corresponding to these protruding parts, so the flexible Type light-emitting modules can have better layout utilization. In addition, since the size of the flexible light-emitting module of the present invention is not limited by the size of the substrate, or the expanded flexible light-emitting module can have a relatively large length, therefore, the flexible light-emitting module of the present invention The backlight module that can be formed with other components can also have a larger size, so that such a backlight module can be applied to a large-sized display device.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1A is a top view of a folded state of a flexible light emitting module according to the first embodiment of the present invention.

Fig. 1B is a top view of an unfolded state of a flexible light emitting module according to the first embodiment of the present invention.

FIG. 1C is a schematic partial cross-sectional view of an unfolded state of a flexible light-emitting module according to the first embodiment of the present invention.

Fig. 2 is a top view of a folded state of a flexible light-emitting module according to a second embodiment of the present invention.

Fig. 3 is a top view of a folded state of a flexible light emitting module according to a third embodiment of the present invention.

Fig. 4 is a top view of a folded state of a flexible light emitting module according to a fourth embodiment of the present invention.

Fig. 5 is a top view of a folded state of a flexible light-emitting module according to a fifth embodiment of the present invention.

FIG. 6 is a top view of a backlight module according to an embodiment of the present invention.

FIG. 7 is a schematic perspective view of a display device according to an embodiment of the present invention.

Explanation of reference signs:

100, 200, 300, 400, 500: flexible light emitting module

110: flexible substrate

111: The first component area

111a: First reflex zone

112: Second component area

112a: Second reflex zone

113: The third component area

113a: The third reflex zone

114: The fourth component area

121: First side

122, 422: second side

131: First side

132: Second Side

141: first protrusion

142, 442, 542: second protrusion

150, 250, 550: light emitting element

151: Distance

160: connection pad

C1: first cutting line

C1a: first direction of extension

C2: second cutting line

C2a: Second direction of extension

C3: Third cutting line

C3a: Third direction of extension

F1: first polyline

F2: second polyline

F3: third fold line

F4: Fourth fold line

F5: fifth fold line

F6: Sixth folding line

S1: first side

S2: second side

S3: third side

S4: Fourth side

S5: fifth side

S6: Sixth side

S7: Seventh side

S8: Eighth side

P1: the first point

P2: Second point

P3: The third point

P4: The fourth point

P5: fifth point

10: Backlight module

11: Light guide plate

11a: light incident surface

11b: Light-emitting surface

20: Display device

21: Display component layer

R: area

Detailed ways

FIG. 1A is a top view of a folded state of a flexible light emitting module according to the first embodiment of the present invention. Fig. 1B is a top view of the unfolded state of a flexible light-emitting module according to the first embodiment of the present invention. FIG. 1C is a schematic partial cross-sectional view of a flexible light-emitting module in an unfolded state according to the first embodiment of the present invention. Specifically, FIG. 1C is a schematic cross-sectional view of the region R in FIG. 1B .

In this embodiment, the flexible light emitting module 100 may include a flexible substrate 110 , a plurality of connection pads 160 and a plurality of light emitting elements 150 . The light emitting element 150 is disposed on the first surface 131 of the flexible substrate 110 , and the light emitting element 150 can be electrically connected to the connection pad 160 through a wire (not shown). In this embodiment, the connection pads 160 are disposed on the first surface 131 of the flexible substrate 110 , but the invention is not limited thereto. In other embodiments, the connection pads 160 may be disposed on the second surface 132 of the flexible substrate 110 opposite to the first surface 131 according to the requirement of circuit layout. In addition, the plurality of light emitting elements 150 may be connected in series and/or in parallel, and may emit light of the same and/or different colors. In this embodiment, the light emitting element 150 is, for example, a light emitting diode (Light-emitting diode; LED). The electrical connection methods are not limited. The material of the flexible substrate 110 is, for example, polyimide (PI) or other suitable flexible materials, so that the flexible light-emitting module 100 with the flexible substrate 110 can be flexed or bent.

As shown in FIG. 1A, the flexible substrate 110 can be a full-surface sheet substrate, and the flexible substrate 110 has a first side 121 and a second side 122 opposite to each other, wherein compared with the second side 122, The connection pad 160 is closer to the first side 121 . The flexible substrate 110 has a first cutting line C1 , a first folding line F1 and a second folding line F2 . The first cutting line C1 and the first folding line F1 intersect at the first point P1, the first cutting line C1 and the second folding line F2 intersect at the second point P2, and the first cutting line C1 extends from the first side along the first extending direction C1a 121 extends toward the second side 122, and the first cutting line C1 passes through the first point P1 and ends at the second point P2. In other words, the first cutting line C1 does not penetrate through the flexible substrate 110 . In this way, the flexible substrate 110 can be cut along the first cutting line C1 by scissors, blades, water jet cutting, laser cutting or other suitable cutting devices/methods, so that the flexible substrate 110 is formed on the first cutting line C1. The first element region 111 and the second element region 112 on opposite sides of the cutting line C1 are connected by the first inflection region 111 a therebetween.

As shown in FIGS. 1A to 1C , the first element region 111 has a first side S1 and a second side S2 opposite to each other, and the second element region 112 has a third side S3 and a fourth side S4 opposite to each other. Moreover, since the first side S1 of the first element region 111 and the third side S3 of the second element region 112 are formed by cutting the flexible substrate 110 along the first cutting line C1, the first side S1 The contour corresponds to the contour of the third side S3 between the first point P1 and the first side 121 . The first cutting line C1 is a fold line with a plurality of concave-convex contours. In this way, in the first extending direction C1a, a plurality of first protruding portions 141 staggered on both sides of the first cutting line C1 can be formed by the first cutting line C1 having a concave-convex profile. That is to say, part of the first protruding portion 141 is located on the first side S1 of the first element region 111, and the remaining part of the first protruding portion 141 is located on the third side S3 of the second element region 112, and is located on the first element area. The first protruding portion 141 of the area 111 and the first protruding portion 141 located in the second device area 112 overlap each other in the first extending direction C1a and are arranged alternately on opposite sides of the first cutting line C1.

In this embodiment, the concave-convex profile of the first cutting line C1 is basically a regular trapezoid, so that the first protrusion 141 defined by the first cutting line C1 has a corresponding regular trapezoid, and the upper part of the regular trapezoid The bottom is a part of the first cutting line C1 (or, the first side S1/third side S3), but the present invention is not limited thereto. In other embodiments, these concavo-convex contours may be similar to arcs, triangles, rectangles or inverted trapezoids, so that the shape of the first protrusion 141 is corresponding to arcs, triangles, rectangles or inverted trapezoids.

The light emitting element 150 is disposed on the first protruding portion 141 , and the distance 151 between the light emitting element 150 and the first cutting line C1 is the same in a direction perpendicular to the first extending direction C1a. That is to say, in a direction perpendicular to the first extending direction C1a, the distance 151 between the light emitting elements 150 disposed on the first element region 111 and the first side S1 is the same, and the light emitting elements disposed on the second element region 112 150 is the same as the distance 151 between the third side S3. In this way, when the flexible light emitting module 100 is in the collapsed state as shown in FIG. 1A , the light emitting elements 150 can overlap each other in the first extending direction C1a. Moreover, when the flexible light emitting module 100 is in the unfolded state as shown in FIG. 1B , the light emitting elements 150 can overlap each other. Of course, since the unfolded state shown in FIG. 1B is specific, when the flexible light emitting module 100 is in other different unfolded or flexed states, the light emitting elements 150 may not overlap.

In this embodiment, one light emitting element 150 is configured corresponding to one first protruding portion 141 . That is, the number of light emitting elements 150 is the same as the number of first protrusions 141, but the present invention is not limited thereto. For example, in the embodiment shown in FIG. 1A and FIG. 1B , three first protrusions 141/light-emitting elements 150 located on the first element region 111 are taken as an example, and they are located in the second element region 112 The number of first protruding parts 141 /light emitting elements 150 on the top is three as an example.

Please refer to FIG. 1A to FIG. 1C at the same time. In this embodiment, the transition mode between the folded state and the unfolded state of the flexible light emitting module 100 can be as follows. First, please refer to FIG. 1A , the second element region 112 can be folded toward the first element region 111 and the first reflexed region 111a along the second fold line F2, so that the first element region 112 faces and contacts each other in the folded state. The side S1 is separated from the third side S3 , and makes the first surface 131 located in the second device region 112 face the first surface 131 located in the first device region 111 and the first surface 131 located in the first inflection region 111 a. Next, the folded second element region 112 and the first reflexed region 111a can be folded toward the first device region 111 along the first fold line F1, so that the second surface 132 located in the first reflexed region 111a faces The second surface 132 located on the first device area 111 is configured to form an unfolded state as shown in FIG. 1B . Moreover, in the region R in FIG. 1B , a schematic cross-sectional view from the second side S2/fourth side S4 to the first side S1/third side S3 may be as shown in FIG. 1C . In addition, the flexible light-emitting module 100 can be converted from the unfolded state to the collapsed state by performing the above steps in reverse.

Certainly, the above-mentioned conversion manner between the unfolded state and the collapsed state of the flexible light-emitting module 100 is only an exemplary representation, and is not limited in the present invention. For example, the second element region 112 can be folded toward the first element region 111 and the first reflexed region 111a along the second folding line F2, so that the first sides S1 and The third side S3 is separated, and makes the second surface 132 located in the second device area 112 face the second surface 132 located in the first device area 111 and the second surface 132 located in the first inflection area 111a. Next, the folded second element region 112 and the first reflexed region 111a can be folded toward the first element region 111 along the first fold line F1, so that the first surface 131 located in the first reflexed region 111a faces Located on the first surface 131 of the first component area 111 to form another unfolded state. In addition, the flexible light-emitting module 100 can be converted from another unfolded state to a collapsed state by performing the above steps in reverse.

Of course, the flexible light-emitting module 100 can also have other different unfolded or bent states through different cutting or folding/bending methods of the flexible substrate 110 .

Fig. 2 is a top view of a folded state of a flexible light-emitting module according to a second embodiment of the present invention. In this embodiment, the flexible light-emitting module 200 is similar to the flexible light-emitting module 100 , and the similar components are denoted by the same reference numerals and have similar functions, and the description thereof will be omitted. Please refer to FIG. 1A and FIG. 2 , the difference between the flexible light emitting module 200 of this embodiment and the flexible light emitting module 100 of the above embodiment is that a plurality of light emitting elements 250 are arranged corresponding to one first protruding portion 141 . That is to say, the number of light emitting elements 250 is an integer multiple of the number of the first protrusions 141 . In the embodiment shown in FIG. 2 , three first protrusions 141 located on the first element region 111 are taken as an example, and six light-emitting elements 250 located on the first element region 111 are taken as an example. Three first protruding parts 141 located on the second device area 112 are taken as an example, and six light emitting elements 250 located on the second device area 112 are taken as an example.

Of course, the flexible light emitting module 200 of this embodiment can also be switched between the unfolded state and the folded state in a manner similar to that of the flexible light emitting module 100 of the above embodiment, which will not be repeated here.

Fig. 3 is a top view of a folded state of a flexible light emitting module according to a third embodiment of the present invention. In this embodiment, the flexible light-emitting module 300 is similar to the flexible light-emitting module 100 , and similar components thereof are denoted by the same reference numerals and have similar functions, and description thereof will be omitted.

1A and FIG. 3, in this embodiment, the flexible substrate 110 also has a second cut line C2, a third cut line C3, a third fold line F3, a fourth fold line F4, a fifth fold line F5 and a sixth fold line. Polyline F6. The second cutting line C2 is located between the first cutting line C1 and the third cutting line C3. The third folding line F3 is located between the first cutting line C1 and the second cutting line C2. The fifth folding line F5 is located between the second cutting line C2 and the third cutting line C3. The second cutting line C2, the third folding line F3 and the fourth folding line F4 intersect at the third point P3. The second cutting line C2 extends from the second side 122 to the first side 121 along the second extending direction C2a. The second extending direction C2a is opposite to the first extending direction C1a, and the second cutting line C2 ends at the third point P3. The third cutting line C3 and the fifth folding line F5 intersect at the fourth point P4, the third cutting line C3 and the sixth folding line F6 intersect at the fifth point P5, and the third cutting line C3 extends from the first side along the third extension direction C3a 121 extends toward the second side 122, the third extending direction C3a is the same as the first extending direction C1a, and the third cutting line C3 passes through the fourth point P4 and ends at the fifth point P5. In other words, neither the second cutting line C2 nor the third cutting line C3 penetrates through the flexible substrate 110 . In this way, the flexible substrate 110 can be cut along the second cutting line C2 and the third cutting line C3, so that the flexible substrate 110 can further form the third element region 113 and the fourth element region 114, wherein the second The device region 112 and the third device region 113 are on opposite sides of the second cutting line C2 , and the third device region 113 and the fourth device region 114 are on opposite sides of the third cutting line C3 . The second element region 112 and the third element region 113 are connected by the second inflection region 112a therebetween, and the third element region 113 and the fourth element region 114 are connected by the third inflection region 113a therebetween. The first inflection region 111 a and the second inflection region 112 a are respectively located at two opposite ends of the second element region 112 , and the second inflection region 112 a and the third inflection region 113 a are respectively located at opposite ends of the third element region 113 .

The third device region 113 has a fifth side S5 and a sixth side S6 opposite to each other, and the sixth device region has a seventh side S7 and an eighth side S8 opposite to each other. Moreover, since the fourth side S4 of the second element region 112 and the sixth side S6 of the third element region 113 are formed by cutting the flexible substrate 110 along the second cutting line C2, and the third element region 113 The fifth side S5 and the seventh side S7 of the fourth element region 114 are formed by cutting the flexible substrate 110 along the third cutting line C3. Therefore, the outline of the fourth side S4 corresponds to that of the sixth side S6. contour, and the contour of the fifth side S5 corresponds to the contour of the seventh side S7 between the fourth point P4 and the first side 121 . The third cutting line C3 is a broken line with a plurality of concave-convex contours. In this way, in the third extending direction C3a, the third cutting line C3 having a concave-convex profile can form a plurality of second protrusions 142 staggered on both sides of the third cutting line C3. That is to say, part of the second protruding portion 142 is located on the fifth side S5 of the third element region 113, and the remaining part of the second protruding portion 142 is located on the seventh side S7 of the fourth element region 114, and is located on the third element region. The second protruding portion 142 of the area 113 and the second protruding portion 142 located in the fourth device area 114 overlap each other in the third extension direction C3 a and are arranged staggered on opposite sides of the third cutting line C3 .

In this embodiment, the number of the first protrusions 141 is the same as the number of the second protrusions 142 , but the present invention is not limited thereto.

In this embodiment, the size and shape of the first protruding portion 141 are the same as that of the second protruding portion 142 , but the invention is not limited thereto.

Fig. 4 is a top view of a folded state of a flexible light emitting module according to a fourth embodiment of the present invention. In this embodiment, the flexible light-emitting module 400 is similar to the flexible light-emitting module 300 , and similar components thereof are denoted by the same reference numerals and have similar functions, and description thereof will be omitted. Please refer to FIG. 3 and FIG. 4 , the difference between the flexible light emitting module 400 of this embodiment and the flexible light emitting module 300 of the above embodiment is that the second side 422 of the flexible substrate 110 is in the shape of a broken line. Part of the fourth side S4 of the second element region 112 and the sixth side S6 of the third element region 113 are formed by cutting the flexible substrate 110 along the second cutting line C2. Therefore, part of the outline of the fourth side S4 corresponds to on the contour of the sixth side S6. Also, the number of the first protrusions 141 is different from the number of the second protrusions 442 .

Fig. 5 is a top view of a folded state of a flexible light-emitting module according to a fifth embodiment of the present invention. In this embodiment, the flexible light-emitting module 500 is similar to the flexible light-emitting module 300 , and similar components thereof are denoted by the same reference numerals and have similar functions, and description thereof will be omitted. Please refer to FIG. 3 and FIG. 5 , the difference between the flexible light emitting module 500 of this embodiment and the flexible light emitting module 300 of the above embodiment lies in: the size of the first protrusion 141 and the size of the second protrusion 542 different. In addition, the light emitting element 550 disposed on the second protruding portion 542 may be the same as or different from the light emitting element 150 disposed on the first protruding portion 141 , which is not limited in the present invention.

FIG. 6 is a top view of a backlight module 10 according to an embodiment of the present invention. In this embodiment, the backlight module 10 may include a light guide plate 11 and the flexible light emitting module of any of the foregoing embodiments. It should be noted that in the embodiment shown in FIG. 6 , the plurality of flexible light-emitting modules included in the backlight module 10 are exemplified by the flexible light-emitting module 100 of the first embodiment in an unfolded state, and For clarity, each flexible light-emitting module 100 only shows the relative relationship between the flexible substrate 110 and the plurality of light-emitting elements 150 , and the folded state of the flexible substrate 110 is omitted.

Please refer to FIG. 6, in the flexible light emitting module 100, the first surface 131 equipped with the light emitting element 150 faces the light incident surface 11a of the light guide plate 11, so that the light emitted by the light emitting element 150 can be incident through the light incident surface 11a. The light enters the light guide plate 11, and then exits from the light exit surface 11b of the light guide plate 11 after passing through the light guide.

In this embodiment, the flexible light emitting module 100 is taken as an example in an unfolded state, but the present invention is not limited thereto. In other embodiments, the flexible light emitting module 100 may have other bending or bending states according to design requirements.

FIG. 7 is a schematic perspective view of a display device 20 according to an embodiment of the present invention. In this embodiment, the display device 20 may include a display element layer 21 and a backlight module 10 , wherein the backlight module 10 may include a light guide plate 11 and the flexible light emitting module of any of the foregoing embodiments. It should be noted that in the embodiment shown in FIG. 7 , the multiple flexible light emitting modules included in the backlight module 10 are exemplified by the flexible light emitting module 100 of the first embodiment in the unfolded state, and For clarity, the backlight module 10 only shows the relative relationship between the flexible substrate 110 and the light guide plate 11 in the flexible light emitting module 100 , and omits the folded state of the flexible substrate 110 .

Please refer to FIG. 7 , the light emitted by the flexible light-emitting module 100 can enter the light guide plate 11 through the light incident surface 11a, and then be emitted from the light exit surface 11b of the light guide plate 11 after being guided, and controlled by the display element layer 21. The brightness of the light.

To sum up, the flexible light-emitting module of the present invention uses a full-surface flexible substrate as the base material, and after the flexible substrate is cut and folded, the flexible light-emitting module can be self-folded The state is transformed into the unfolded state, therefore, the size of the flexible light-emitting module is not limited by the size of the substrate. In addition, the flexible light-emitting module of the present invention forms a plurality of protruding parts interlaced on both sides of the cutting line in the extending direction of the cutting line, and the light-emitting elements are arranged corresponding to these protruding parts, so the flexible Type light-emitting modules can have better layout utilization. In addition, since the size of the flexible light-emitting module of the present invention is not limited by the size of the substrate, or the expanded flexible light-emitting module can have a relatively large length, therefore, the flexible light-emitting module of the present invention The backlight module that can be formed with other components can also have a larger size, so that such a backlight module can be applied to a large-sized display device.

Although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention, so the protection of the present invention The scope should be determined as defined by the claims.

Claims (20)

1. A flexible light-emitting module, comprising: A flexible substrate has a first side, a second side opposite to the first side, and a first cutting line, wherein the first cutting line extends from the first side to the second side to forming a plurality of first protrusions arranged alternately on both sides of the first cutting line along the first extending direction of the first cutting line; and A plurality of light-emitting elements are arranged on the flexible substrate, and the light-emitting elements are arranged corresponding to the first protrusions. 2. The flexible light emitting module according to claim 1, wherein the first protrusions overlap each other along the first extending direction. 3. The flexible light emitting module as claimed in claim 1, wherein the distances between the light emitting elements and the first cutting line are the same. 4. The flexible light emitting module according to claim 1, wherein each of the light emitting elements is configured corresponding to each of the first protrusions. 5. The flexible light emitting module according to claim 1, wherein a plurality of the light emitting elements are arranged corresponding to each of the first protrusions. 6. The flexible light-emitting module according to claim 1, wherein the flexible substrate further has a second cutting line and a third cutting line, wherein: the second cutting line extends from the second side to the first side; and The third cutting line extends from the first side to the second side, so as to form a plurality of second protrusions staggered on both sides of the third cutting line along the extending direction of the third cutting line, The second cutting line is located between the first cutting line and the third cutting line, and the light emitting elements are also configured corresponding to the second protrusions. 7. The flexible light emitting module as claimed in claim 6, wherein the number of the first protrusions is different from the number of the second protrusions. 8. The flexible light emitting module as claimed in claim 6, wherein the size of the first protrusions is different from that of the second protrusions. 9. A flexible light-emitting module, comprising: A flexible substrate has a plurality of first protrusions, a first surface and a second surface opposite to the first surface, the flexible substrate includes: A first device area having a first side and a second side opposite to the first side, wherein part of the first protrusions are located on the first side; A second device area has a third side and a fourth side opposite to the third side, wherein part of the first protrusions are located on the third side, and the outline of the first side corresponds to the the outline of the third side; and a first inflection region connected between the first element region and the second element region; and A plurality of light-emitting elements are arranged on the first surface of the flexible substrate, and the light-emitting elements are arranged corresponding to the first protrusions. 10. The flexible light emitting module as claimed in claim 9, wherein the first protrusions overlap with each other. 11. The flexible light emitting module according to claim 9, the distance between the light emitting elements and the first side or the third side is the same. 12. The flexible light-emitting module according to claim 9, wherein each of the light-emitting elements is corresponding to each of the first protrusions. 13. The flexible light emitting module according to claim 9, wherein a plurality of the light emitting elements are arranged corresponding to each of the first protrusions. 14. The flexible light-emitting module according to claim 9, wherein the flexible substrate further has a plurality of second protrusions, the light-emitting elements are also configured corresponding to the second protrusions, and the flexible Flexible substrates also include: The third device area has a fifth side and a sixth side opposite to the fifth side, wherein part of the second protrusions are located on the fifth side; The fourth device area has a seventh side and an eighth side opposite to the seventh side, wherein part of the second protrusions are located on the seventh side, and the outline of the fifth side corresponds to the first seven-sided outline; a second inflection region connected between the second element region and the third element region, and the first inflection region and the second inflection region are respectively located at opposite ends of the second element region; and The third inflection area is connected between the third element area and the fourth element area, and the second inflection area and the third inflection area are respectively located at two opposite ends of the third element area. 15. The flexible light emitting module as claimed in claim 14, wherein the number of the first protrusions is different from the number of the second protrusions. 16. The flexible light emitting module as claimed in claim 14, wherein the size of the first protrusions is different from that of the second protrusions. 17. The flexible light emitting module as claimed in claim 9, wherein the first side of the first element region faces the third side of the second element region. 18. The flexible light emitting module according to claim 9, wherein: The first surface located in the first element area faces the first surface located in the first reflexed area, and the second surface located in the first reflexed area faces the second surface located in the second element area ;or The second surface located in the first element area faces the second surface located in the first reflexed area, and the first surface located in the first reflexed area faces the first surface located in the second element area . 19. A backlight module, comprising: a light guide plate; and The flexible light emitting module as claimed in claim 9 , wherein the first surface located in the first element area and the first surface located in the second element area face the light guide plate. 20. A display device comprising: The backlight module of claim 19; and A display element layer is configured on the backlight module.