TWI647498B - Flexible light emitting module, backlight module with the same, and display device using the same - Google Patents

Abstract

A 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 on both sides of the first cutting line in an extending direction along the first cutting line. The light emitting element is disposed on the flexible substrate, and the light emitting element is disposed corresponding to the first protruding portion.

Description

Flexible light-emitting module, backlight module having the same, and display device using the backlight module

The invention relates to a light-emitting module, a backlight module and a display device, and more particularly to a flexible light-emitting module, a backlight module having the flexible light-emitting module and a display using the backlight module. Device.

Since the liquid crystal in the liquid crystal display device does not emit light by itself, a light source required for display is usually provided by adding a backlight module. The general method of the backlight module is composed of a light-emitting module and a light guide plate. The light-emitting module is formed by arranging 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 often limited by the size of the substrate.

However, in large-sized display devices, because the size 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 use Several light bars form a backlight module. However, the layout of such a configuration method (utilization of layout) Poor, and greatly affected by the size of the light bar. Therefore, how to improve the layout utilization of the light bar and reduce the limitation caused by the size of the light bar has become an issue to be solved urgently.

The invention provides a flexible light-emitting module, which has better layout utilization ratio, 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 a 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 display device, which can be a large-sized display device, and the light-emitting module included has a better layout utilization rate, 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 to form a plurality of first protrusions arranged on both sides of the first cutting line in an extending direction along the first cutting line. The light emitting element is disposed on the flexible substrate, and the light emitting element is disposed corresponding to the first protruding portion.

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 device region, a second device region, and a first device region. A reverse fold zone. The first element region has a first side and a second side opposite to the first side, and a portion of the first protruding portion is located on the first side. The second element region has a third side and a fourth side opposite to the third side. A portion 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 fold-back region is connected between the first element region and the second element region. The light emitting element is disposed on the first surface of the flexible substrate, and the light emitting element is disposed corresponding to the first protruding portion.

The backlight module of the present invention includes a light guide plate and the aforementioned flexible light emitting module. In the flexible light-emitting module, the first surface on the first element region and the first surface on the second element region face the light guide plate.

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

Based on the above, the flexible light-emitting module of the present invention uses a flexible substrate as a base material, and after the flexible substrate is cut and folded, the flexible light-emitting module can be converted from a collapsed state to an expanded state. Therefore, the size of the flexible light-emitting module is less limited by the size of the substrate. In addition, the flexible light-emitting module of the present invention forms a plurality of protrusions arranged on both sides of the cutting line in the extension direction of the cutting line, and the light-emitting element is arranged corresponding to these protrusions. The flexible light-emitting module 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 light-emitting module can have a larger length, the flexible light-emitting module of the present invention The light-emitting module can be composed of other components and the backlight module can also have a larger size, and further such a backlight module can be applied to a large-sized display device.

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

100, 200, 300, 400, 500‧‧‧ flexible light-emitting module

110‧‧‧ flexible substrate

111‧‧‧First component area

111a‧‧‧The first reflex zone

112‧‧‧Second component area

112a‧‧‧Second Reflex Zone

113‧‧‧Third component area

113a‧‧‧ Third Reverse Zone

114‧‧‧Fourth component area

121‧‧‧first side

122, 422‧‧‧ second side

131‧‧‧ the first side

132‧‧‧Second Side

141‧‧‧The first protrusion

142, 442, 542‧‧‧ second protrusion

150, 250, 550‧‧‧‧Light-emitting elements

151‧‧‧distance

160‧‧‧Connecting pad

C1‧‧‧The first cutting line

C1a‧‧‧First extension direction

C2‧‧‧Second cutting line

C2a‧‧‧Second extension direction

C3‧‧‧ third cutting line

C3a‧‧‧ Third Extension

F1‧‧‧First Polyline

F2‧‧‧Second Polyline

F3‧‧‧ Third Polyline

F4‧‧‧ Fourth Polyline

F5‧‧‧Fifth Polyline

F6‧‧‧ Sixth Polyline

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‧‧‧1

P2‧‧‧Second Point

P3‧‧‧third point

P4‧‧‧Fourth point

P5‧‧‧Fifth point

10‧‧‧ backlight module

11‧‧‧light guide

11a‧‧‧Glass entrance

11b‧‧‧light surface

20‧‧‧ display device

21‧‧‧Display element layer

R‧‧‧ area

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

FIG. 1B is a schematic top view of an expanded 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.

2 is a schematic top view of a collapsed state of a flexible light emitting module according to a second embodiment of the present invention.

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

4 is a schematic top view of a collapsed state of a flexible light-emitting module according to a fourth embodiment of the present invention.

5 is a schematic top view of a collapsed state of a flexible light emitting module according to a fifth embodiment of the present invention.

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

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

FIG. 1A is a schematic top view of a collapsed state of a flexible light emitting module according to a first embodiment of the present invention. FIG. 1B is a schematic top view of an expanded state of a flexible light emitting module according to a first embodiment of the present invention. FIG. 1C is a partial cross-sectional view of a flexible light-emitting module in a deployed state according to a first embodiment of the present invention. Specifically, FIG. 1C is a schematic cross-sectional view of a 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 pad 160 is disposed on the first surface 131 of the flexible substrate 110, but the present invention is not limited thereto. In other embodiments, the connection pad 160 may be disposed on the second surface 132 of the flexible substrate 110 opposite to the first surface 131 according to a requirement on a layout. In addition, the plurality of light emitting elements 150 may be connected in series and / or in parallel with each other, 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 (LED). However, in the present invention, the light-emitting color, quantity, size, style, type, and / or light-emitting element 150 of the light-emitting element 150 are used. There are no restrictions on the electrical connection between them. 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 having the flexible substrate 110 can be flexed or bent.

As shown in FIG. 1A, the flexible substrate 110 may be a full-surface sheet-like substrate, and the flexible substrate 110 has a first side 121 and a second side 122 opposite to each other. Compared to the second side 122, The connection pad 160 is relatively close to the first side 121. The flexible substrate 110 includes a first cutting line C1, a first folding line F1, and a second folding line F2. The first cutting line C1 and the first fold line F1 meet at a first point P1, the first cutting line C1 and the second fold line F2 meet at a second point P2, and the first cutting line C1 is along the first extension direction C1a from the first side 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 the flexible substrate 110. In this way, the flexible substrate 110 can be cut along the first cutting line C1 by scissors, blades, waterjet cutting, laser cutting or other suitable cutting devices / methods, so that the flexible substrate 110 is formed on The first element region 111 and the second element region 112 on opposite sides of the first cutting line C1 are connected, and the first element region 111 and the second element region 112 are connected by a first reflexed region 111a between them.

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. In addition, 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 polyline having a plurality of uneven contours. In this way, in the first extension 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 contour. That is, a portion of the first protruding portion 141 is located in the first element region 111. The first side S1, the rest of the first protruding portion 141 is located on the third side S3 of the second element region 112, and the first protruding portion 141 of the first element region 111 and the first portion of the second element region 112 are The protrusions 141 overlap each other in the first extension direction C1a and are arranged on opposite sides of the first cutting line C1.

In this embodiment, the concave-convex contour of the first cutting line C1 is basically a positive ladder shape, so that the first protruding portion 141 defined by the first cutting line C1 has a corresponding positive trapezoid, and the upper part of the positive trapezoid is The bottom is a part of the first cutting line C1 (or, the first side S1 / the third side S3), but the present invention is not limited thereto. In other embodiments, the concave-convex contours may be similar to an arc, a triangle, a rectangle, or an inverted trapezoid, so that the shape of the first protruding portion 141 is a corresponding arc, a triangle, a rectangle, or an inverted trapezoid.

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 extension direction C1a. That is, in a direction perpendicular to the first extension direction C1a, the distance 151 between the light-emitting element 150 disposed on the first element region 111 and the first side S1 is the same, and the light-emitting element disposed on the second element region 112 The distance 151 between 150 and the third side S3 is the same. 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 C1 a. In addition, when the flexible light emitting module 100 is in an expanded state as shown in FIG. 1B, the light emitting elements 150 may overlap each other. Of course, as shown in FIG. 1B as a specific unfolded state, when the flexible light-emitting module 100 is in a different unfolded or flexed state, the light-emitting elements 150 may not overlap.

In this embodiment, a light-emitting element 150 corresponds to a first protrusion The section 141 is configured. That is, the number of the light emitting elements 150 is the same as the number of the first protruding portions 141, but the present invention is not limited thereto. For example, in the embodiment shown in FIGS. 1A and 1B, the first protruding portion 141 and the light-emitting element 150 located on the first element region 111 are three, and are located in the second element region 112. The first protrusions 141 / light-emitting elements 150 on the top are three examples.

Please refer to FIG. 1A to FIG. 1C at the same time. In this embodiment, the conversion mode between the collapsed state and the expanded state of the flexible light-emitting module 100 can be as follows. First, referring to FIG. 1A, the second element region 112 can be folded toward the first element region 111 and the first reverse-fold region 111a along the second fold line F2, so that the first elements facing and contacting each other in the collapsed state The side S1 is separated from the third side S3, and the first surface 131 located in the second element region 112 faces the first surface 131 located in the first element region 111 and the first surface 131 located in the first reentrant region 111a. Next, the folded second element region 112 and the first refold region 111a may be folded toward the first element region 111 along the first fold line F1 so that the second surface 132 located in the first refold region 111a faces. It is located on the second surface 132 of the first element region 111 to constitute the expanded state as shown in FIG. 1B. In addition, in a region R in FIG. 1B, a schematic cross-sectional view in a direction from the second side S2 / the fourth side S4 to the first side S1 / the third side S3 can be shown in FIG. 1C. In addition, the above-mentioned steps can be reversed to change the flexible light-emitting module 100 from the unfolded state to the collapsed state.

Of course, the foregoing conversion manner between the expanded state and the collapsed state of the flexible light-emitting module 100 is merely an exemplary representation, and is not limited in the present invention. For example, the second element region 112 may be folded along the second fold line F2 toward the first element region 111 and the first reverse-fold region 111a so as to face and contact each other in the collapsed state. The first side S1 and the third side S3 are separated, and the second surface 132 located in the second element region 112 faces the second surface 132 located in the first element region 111 and the second surface 132 located in the first reflexed region 111a. . Next, the folded second element region 112 and the first refold region 111a may be folded toward the first element region 111 along the first fold line F1, so that the first surface 131 located in the first refold region 111a faces. The first surface 131 is located on the first element region 111 to form another expanded state. In addition, the above steps can be reversed to change the flexible light-emitting module 100 from another unfolded state to a closed state.

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

2 is a schematic top view of a collapsed 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 similar components are denoted by the same reference numerals, and have similar functions, and descriptions thereof are 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 configured corresponding to one first protruding portion 141 . That is, the number of the 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 protruding portions 141 on the first element region 111 are exemplified by three, and six light emitting elements 250 on the first element region 111 are exemplified. Three of the first protruding portions 141 on the second element region 112 are taken as an example, and six of the light-emitting elements 250 on the second element region 112 are taken as an example.

Of course, the flexible light-emitting module 200 of this embodiment can also switch between the expanded state and the collapsed state in a similar manner to the flexible light-emitting module 100 of the above-mentioned embodiment, which will not be described in detail here.

3 is a schematic top view of a collapsed 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 are denoted by the same reference numerals, and have similar functions, and descriptions thereof are omitted.

Please refer to FIGS. 1A and 3. In this embodiment, the flexible substrate 110 further includes a second cutting line C2, a third cutting line C3, a third folding line F3, a fourth folding line F4, a fifth folding line F5, and a sixth Polyline F6. The second cutting line C2 is located between the first cutting line C1 and the third cutting line C3. The third fold line F3 is located between the first cutting line C1 and the second cutting line C2. The fifth fold 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 meet at a 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, and the second extending direction C2a is opposite to the first extension direction C1a, and the second cutting line C2 ends at the third point P3. The third cutting line C3 meets the fifth fold line F5 at the fourth point P4, the third cutting line C3 meets the sixth fold line F6 at the fifth point P5, and the third cutting line C3 follows the third extension direction C3a from the first side 121 extends toward the second side 122, the third extension direction C3a is the same as the first extension 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 the flexible substrate 110. In this way, the flexible substrate 110 can be further cut along the second cutting line C2 and the third cutting line C3, so that the flexible substrate 110 can be cut. The flexible substrate 110 further forms a third element region 113 and a fourth element region 114, wherein the second element region 113 and the third element region 113 are on opposite sides of the second cutting line C2, and the third element region 113 and the fourth element The opposite sides of the third cutting line C3 of the region 114. The second element region 112 and the third element region 113 are connected by a second reflexed region 112a between them, and the third element region 113 and the fourth element region 114 are formed by a third reflexed region 113a between each other. Connected. The first reflexed region 111a and the second reflexed region 112a are located at opposite ends of the second element region 112, and the second reflexed region 112a and the third reflexed region 113a are located at opposite ends of the third element region 113, respectively.

The third element region 113 has a fifth side S5 and a sixth side S6 opposed to each other, and the sixth element region has a seventh side S7 and an eighth side S8 opposed to each other. In addition, because 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 the sixth side S6. 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 polyline having a plurality of uneven contours. In this way, in the third extension direction C3a, a plurality of second protruding portions 142 staggered on both sides of the third cutting line C3 can be constituted by the third cutting line C3 having an uneven contour. That is, 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 The second protruding portion 142 of the region 113 and the second protruding portion 142 of the fourth element region 114 are in the third extending direction C3a. This overlap and stagger are arranged on opposite sides of the third cutting line C3.

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

4 is a schematic top view of a collapsed 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 are denoted by the same reference numerals and have similar functions, and descriptions thereof are 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 a broken line. A portion of the fourth side S4 of the second element region 112 and a sixth side S6 of the third element region 113 are formed by cutting the flexible substrate 110 along the second cutting line C2. Therefore, a partial contour of the fourth side S4 corresponds to Contour on the sixth side S6. In addition, the number of the first projections 141 is different from the number of the second projections 442.

5 is a schematic top view of a collapsed 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 are denoted by the same reference numerals and have similar functions, and descriptions thereof are omitted. Please refer to FIG. 3 and FIG. 5. The difference between the flexible light emitting module 500 in this embodiment and the flexible light emitting module 300 in the above embodiment is that the size of the first protruding portion 141 and the second protruding portion 542 are different. Of different sizes. In addition, the light emitting element 550 disposed on the second protruding portion 542 may be disposed on the second protruding portion 542. The light emitting elements 150 on the first protruding portion 141 are the same or different, which is not limited in the present invention.

FIG. 6 is a schematic top view of a backlight module 10 according to an embodiment of the 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 is worth noting that, in the embodiment shown in FIG. 6, the plurality of flexible light-emitting modules included in the backlight module 10 are the flexible light-emitting module 100 of the first embodiment having an expanded state as For example, and for the sake of 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 folding of the flexible substrate 110 is omitted. status.

Referring to FIG. 6, in the flexible light emitting module 100, the first surface 131 of the light emitting element 150 is provided with the light incident surface 11 a of the light guide plate 11 so that the light emitted by the light emitting element 150 can pass through the light incident surface 11 a. The light guide plate 11 enters the light guide plate 11 and is emitted from the light exit surface 11 b of the light guide plate 11 through the light guide.

In this embodiment, the flexible light-emitting module 100 is taken as an example in an expanded state, but the present invention is not limited thereto. In other embodiments, the flexible light-emitting module 100 may have other flexed or bent 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 is worth noting that, in the embodiment shown in FIG. 7, the plurality of flexible light-emitting modules included in the backlight module 10 have an expanded shape. The flexible light emitting module 100 of the first embodiment of the present invention is taken as an example, and for clarity, the backlight module 10 only shows the flexible substrate 110 and the light guide plate 11 in the flexible light emitting module 100. The relative relationship among them is omitted, and the folded state of the flexible substrate 110 is omitted.

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

In summary, the flexible light-emitting module of the present invention uses a flexible substrate of the whole surface type as a base material, and after the flexible substrate is cut and folded, the flexible light-emitting module can be The collapsed state is changed to the expanded state, so the size of the flexible light-emitting module is less limited by the size of the substrate. In addition, the flexible light-emitting module of the present invention forms a plurality of protrusions arranged on both sides of the cutting line in the extension direction of the cutting line, and the light-emitting element is arranged corresponding to these protrusions. The flexible light-emitting module 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 light-emitting module can have a larger length, the flexible light-emitting module of the present invention The light-emitting module can be composed of other components and the backlight module can also have a larger size, and further such a backlight module can be applied to a large-sized display device.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (20)

A flexible light-emitting module includes: a flexible substrate having 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 Extending laterally to the second side to form a plurality of first protrusions arranged on both sides of the first cutting line in a first extending direction along the first cutting line; and a plurality of light emitting elements, configured On the flexible substrate, the light emitting elements are arranged corresponding to the first protruding portions. The flexible light-emitting module according to item 1 of the scope of patent application, wherein the first protruding portions overlap each other in the first extending direction. The flexible light-emitting module according to item 1 of the scope of patent application, wherein the distance between the light-emitting elements and the first cutting line is the same. The flexible light-emitting module according to item 1 of the scope of patent application, wherein each of the light-emitting elements is configured corresponding to each of the first protruding portions. The flexible light-emitting module according to item 1 of the scope of patent application, wherein a plurality of the light-emitting elements are arranged corresponding to the first protrusions. The flexible light-emitting module according to item 1 of the patent application scope, wherein the flexible substrate further has a second cutting line and a third cutting line, wherein: the second cutting line is from the second lateral direction The first side extends; and the third cutting line extends from the first side to the second side to form a plurality of staggered sides of the third cutting line in an extending direction along the third cutting line. The second protruding line, the second cutting line is located between the first cutting line and the third cutting line, and the light emitting elements are more corresponding to the second protruding portions. The flexible light-emitting module according to item 6 of the scope of patent application, wherein the number of the first protruding portions is different from the number of the second protruding portions. The flexible light-emitting module according to item 6 of the scope of patent application, wherein the sizes of the first protruding portions are different from the sizes of the second protruding portions. A flexible light-emitting module includes: a flexible substrate having a plurality of first protrusions, a first surface, and a second surface opposite to the first surface; the flexible substrate includes: a The first element region has a first side and a second side opposite to the first side, and some of the first protrusions are located on the first side; a second element region has a third side And a fourth side opposite to the third side, some of the first protrusions are located on the third side, and the outline of the first side corresponds to the outline of the third side; and a first reflection A folding region is connected between the first element region and the second element region; and a plurality of light-emitting elements are disposed on the first surface of the flexible substrate, and the light-emitting elements correspond to the first regions Arrangement of protrusions. The flexible light-emitting module according to item 9 of the scope of patent application, wherein the first protruding portions overlap each other. For example, in the flexible light-emitting module according to item 9 of the scope of patent application, the distance between the light-emitting elements and the first side or the third side is the same. The flexible light-emitting module according to item 9 of the scope of patent application, wherein each of the light-emitting elements is configured corresponding to each of the first protrusions. The flexible light-emitting module according to item 9 of the scope of patent application, wherein a plurality of the light-emitting elements are arranged corresponding to the first protrusions. The flexible light-emitting module according to item 9 of the scope of patent application, wherein the flexible substrate further has a plurality of second protrusions, the light-emitting elements are more corresponding to the second protrusions, and The flexible substrate further includes: a third element region having a fifth side and a sixth side opposite to the fifth side, wherein some of the second protruding portions are located on the fifth side; a fourth element Area, which has a seventh side and an eighth side opposite to the seventh side, some of the second protrusions are located on the seventh side, and the outline of the fifth side corresponds to the seventh side Outline; a second reverse-folded region connected between the second element region and the third element region, and the first and second reverse-folded regions are respectively located at opposite ends of the second element region; And a third reverse-folded region is connected between the third element region and the fourth element region, and the second and third reverse-folded regions are located at opposite ends of the third element region, respectively. The flexible light-emitting module according to item 14 of the scope of patent application, wherein the number of the first protruding portions is different from the number of the second protruding portions. The flexible light-emitting module according to item 14 of the scope of patent application, wherein the sizes of the first protruding portions are different from the sizes of the second protruding portions. The flexible light-emitting module according to item 9 of the scope of patent application, wherein the first side of the first element region faces the third side of the second element region. The flexible light-emitting module according to item 9 of the scope of patent application, wherein: the first surface located in the first element area faces the first surface located in the first reflex area, and is located in the first reverse area The second surface of the fold zone faces the second surface of the second element zone; or the second surface of the fold zone faces the second surface of the first reverse fold zone and is located on the first The first surface of a refolded region faces the first surface of the second element region. A backlight module includes: a light guide plate; and the flexible light-emitting module according to 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. A display device includes: a backlight module as claimed in claim 19; and a display element layer disposed on the backlight module.