Backlight module and backlight device using the same

Abstract

The present application provides a backlight module and a backlight device using the same. The backlight module includes a first light guide plate, a second light guide plate and a light source plate. The first light guide plate includes a first body and a first turning portion. The first turning portion includes a first tail section and a first connecting section. The first connecting section connects the first tail section and the first body, wherein the first tail section overlaps the first connecting section along a first direction. The second light guide plate is arranged opposite to the first light guide plate. The light source plate is arranged on the first light guide plate and the second light guide plate. The first direction is substantially perpendicular to an extending direction of the first body. The present application makes the side of the backlight module also emit light by the overlapping feature of the tail section and the connecting section, thereby increasing the light emitting range of the backlight module.

Description

Technical Field

[0001] This invention relates to the field of backlighting, and more particularly to a backlight module and a backlight device using the same. Background Technology

[0002] Some electronic devices do not emit light themselves, so they require backlight modules to provide illumination. However, due to the structural limitations of backlight modules, they can usually only emit light from one side, which limits the application areas of backlight modules and electronic devices. Summary of the Invention

[0003] According to one aspect of the present invention, a backlight module is provided, comprising: A first light guide plate, the first light guide plate comprising: The first entity; and A first steering unit, the first steering unit comprising: The first tail section; and A first connecting segment connects the first tail segment and the first body, wherein the first tail segment overlaps the first connecting segment along a first direction; A second light guide plate, which is configured opposite to the first light guide plate; and A light source board, which is disposed on the first light guide plate and the second light guide plate; The first direction is perpendicular to the extension direction of the first body.

[0004] As an optional technical solution, the first body has a first radius of curvature, the first steering part has a second radius of curvature, and the first radius of curvature is greater than the second radius of curvature.

[0005] As an optional technical solution, the second radius of curvature is between 1 mm and 1000 mm.

[0006] As an optional technical solution, the slope of the first connecting segment is either positive or negative, while the slope of the first tail segment is either positive or negative.

[0007] As an optional technical solution, the first connecting segment and the first tail segment are connected at a connection point, and the slope of the connection point is infinitely large.

[0008] As an optional technical solution, the light source board includes: A first circuit board, which overlaps with the first light guide plate; and The second circuit board overlaps with the second light guide plate.

[0009] As an optional technical solution, the light source board also includes: A connecting plate that connects the first circuit board and the second circuit board.

[0010] As an optional technical solution, the light source board includes multiple light sources, each light source having an optical axis, and an acute angle is formed between the optical axes of two of the light sources.

[0011] As an optional technical solution, the light source board includes multiple light sources, three of which have a first optical axis, a second optical axis and a third optical axis respectively. The second optical axis has a first angle with the first optical axis, and the third optical axis has a second angle with the first optical axis. The first angle and the second angle are different.

[0012] As an optional technical solution, the light source board has a short side, the light source with the third optical axis is closer to the short side than the light source with the second optical axis, the light source with the second optical axis is closer to the short side than the light source with the first optical axis, and the second included angle is greater than the first included angle.

[0013] As an optional technical solution, the light source board has a long side adjacent to the short side, the light source with the third optical axis is closer to the long side than the light source with the second optical axis, and the light source with the second optical axis is closer to the long side than the light source with the first optical axis.

[0014] As an optional technical solution, the second light guide plate includes: A second body, which is parallel to the first body; and The second steering unit includes: The second tail section; and The second connecting segment connects the second tail segment and the second body, wherein the second tail segment overlaps with the second connecting segment along the first direction.

[0015] As an optional technical solution, the first body has a first radius of curvature, the first steering part has a second radius of curvature, and the first radius of curvature is greater than the second radius of curvature; the second body has a third radius of curvature, the second steering part has a fourth radius of curvature, and the third radius of curvature is greater than the fourth radius of curvature; the fourth radius of curvature is different from or the same as the second radius of curvature.

[0016] As an optional technical solution, the first tail segment and the second tail segment are spaced apart from each other along the first direction.

[0017] As an optional technical solution, the length of the first tail segment is different from the length of the second tail segment.

[0018] As an optional technical solution, the light source board includes multiple light sources, the first light guide plate has a patterned light-shielding layer, and the projection areas of the multiple light sources on the first light guide plate do not overlap with the patterned light-shielding layer at all.

[0019] As an optional technical solution, the first light guide plate has a first short side and a second short side opposite to each other, and a long side adjacent to the first short side and the second short side. The first light guide plate includes a patterned light-shielding layer adjacent to the first short side, the second short side and the long side.

[0020] According to another aspect of the present invention, the present invention also provides a backlight device, comprising: Load-bearing components; and The backlight module described above is configured on the carrier.

[0021] As an optional technical solution, the carrier has a recessed portion, and the first tail section is at least partially located within the recessed portion.

[0022] As optional technical solutions, the following also include: An adhesive component that bonds the backlight module to the carrier component.

[0023] As optional technical solutions, the following also include: The housing covers the backlight module and the carrier.

[0024] As an optional technical solution, the carrier includes: A third body, which overlaps with the first body along the first direction; The third steering part is connected to the third body and overlaps with the third body along the first direction; A fourth body, which overlaps with the second body along the first direction; and The fourth steering part is connected to the fourth body and overlaps with the fourth body along the first direction; The first tail section of the first light guide plate and the second tail section of the second light guide plate are located between the third turning section and the fourth turning section.

[0025] As an optional technical solution, the carrier includes a limiting part, which includes: A first limiting segment, the first limiting segment being connected to one of the third steering portion and the fourth steering portion and extending along the first direction; and The second limiting segment is connected to the first limiting segment and extends along the second direction; The second direction is perpendicular to the first direction.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0027] Figure 1A and Figure 1BSchematic diagrams of a backlight device according to an embodiment of the present invention are shown from different viewing angles.

[0028] Figure 2 Draw Figure 1B An exploded view of the backlight device.

[0029] Figure 3 Draw Figure 2 Exploded view of the backlight module.

[0030] Figure 4A Draw Figure 1B A cross-sectional view of the backlight device along direction 4A-4A'.

[0031] Figure 4B Draw Figure 1B A cross-sectional schematic diagram of the backlight device along direction 4B-4B'.

[0032] Figure 5 Draw Figure 4A A schematic diagram of another embodiment of the first and second tail sections of the backlight device.

[0033] Figure 6 Draw Figure 4A A schematic diagram of another embodiment of the first and second tail sections of the backlight device.

[0034] Figure 7 A schematic diagram of a backlight module according to another embodiment of the present invention is shown.

[0035] Figure 8 A partial cross-sectional schematic diagram of a backlight module according to an embodiment of the present invention is shown.

[0036] Figure 9 A partial cross-sectional schematic diagram of a backlight module according to another embodiment of the present invention is shown.

[0037] Figure 10 A partial cross-sectional schematic diagram of a backlight module according to another embodiment of the present invention is shown.

[0038] Figure 11 A partial cross-sectional schematic diagram of a backlight device according to another embodiment of the present invention is shown. Detailed Implementation

[0039] To provide a further understanding of the purpose, structure, features and functions of the present invention, detailed descriptions are provided below with reference to embodiments.

[0040] Please refer to Figures 1A to 3 , Figure 1A and Figure 1B Schematic diagrams of a backlight device 1 according to an embodiment of the present invention are shown from different viewing angles. Figure 2 Draw Figure 1BAn exploded view of the backlight device 1, and Figure 3 Draw Figure 2 Exploded view of the backlight module 100.

[0041] like Figures 1A to 3 As shown, the backlight device 1 is a modular device that can be assembled into an electronic device to provide illumination. The aforementioned electronic device is, for example, a laptop computer, a display device, a home appliance, or other products that require a light source.

[0042] like Figures 1A to 3 As shown, the backlight device 1 includes a housing 10, a carrier (or inner component) 20, and a backlight module 100. The backlight module 100 is disposed on the carrier 20, and the housing 10 may cover the backlight module 100 and the carrier 20. In one embodiment, the housing 10 and the carrier 20 are, for example, light-transmitting components having a light transmittance, for example, between 50% and 100%, such as 50%, 60%, 70%, 80%, 90%, 100%, or other real numbers.

[0043] like Figure 3 As shown, the backlight module 100 includes a first light guide plate 110, a second light guide plate 120, and a light source plate 130. The light source plate 130 is disposed on the first light guide plate 110 and the second light guide plate 120. The first light guide plate 110 includes a first body 111 and at least one first turning portion 112. The first turning portion 112 includes a first tail section 1121 and a first connecting section 1122. The first connecting section 1122 connects the first tail section 1121 and the first body 111, wherein the first tail section 1121 at least partially overlaps with the first connecting section 1122 along the first direction Z. In this embodiment, by means of the overlapping feature of the tail section and the connecting section, light can also be emitted from the side of the backlight module 100, increasing the light emission range of the backlight module 100. In addition, since the second light guide plate 120 is arranged opposite to the first light guide plate 110, the backlight module 100 is a multi-faceted light-emitting module. The first direction Z is substantially perpendicular to the extension direction of the first body 111.

[0044] In one embodiment, the first direction Z is, for example, parallel to the overlapping direction of the light source plate 130 and the first light guide plate 110, and the extension direction of the aforementioned first body 111 is, for example, substantially parallel to the XY plane, wherein the first direction Z is substantially perpendicular to the XY plane.

[0045] Although not shown, the light guide plates (first light guide plate 110 and second light guide plate 120) and the light source plate 130 can be fixed to each other by an adhesive layer. The aforementioned adhesive layer is, for example, double-sided tape.

[0046] Please refer to Figures 4A-4B , Figure 4A Draw Figure 1B A cross-sectional view of the backlight device 1 along direction 4A-4A', and Figure 4BDraw Figure 1B A cross-sectional view of the backlight device 1 along direction 4B-4B'.

[0047] like Figure 4A As shown, the first body 111 has a first body surface 111s, and the first steering portion 112 has a first steering surface 112s (the first steering surface 112s is shown in the figure). Figure 3 The first body surface 111s has a first radius of curvature, and the first steering surface 112s has a second radius of curvature. The first radius of curvature may be greater than the second radius of curvature. In one embodiment, the entire first body surface 111s may be a plane or a combination of a plane and a curved surface, while the entire first steering surface 112s may be a curved surface or a combination of a plane and a curved surface. As long as the first radius of curvature is greater than the second radius of curvature, the embodiments of the present invention do not limit the geometry of the first body surface 111s and / or the first steering surface 112s. In one embodiment, the second radius of curvature of the first steering surface 112s may, for example, be between 1 mm and 1000 mm, such as 5 mm, 10 mm, 100 mm, 200 mm, etc.

[0048] like Figure 4A As shown, the slope of the first connecting segment 1122 is either positive or negative, while the slope of the first tail segment 1121 is either positive or negative (i.e., if the slope of the first connecting segment 1122 is positive, then the slope of the first tail segment 1121 is negative; if the slope of the first connecting segment 1122 is negative, then the slope of the first tail segment 1121 is positive). In this embodiment of the invention, the slope of the first connecting segment 1122 is described as positive, and the slope of the first tail segment 1121 as negative (i.e., the description is based on the example of the first connecting segment 1122 having a positive slope and the first tail segment 1121 having a negative slope). The first connecting segment 1122 and the first tail segment 1121 are connected at a connection point P1, and the slope of the connection point P1 is, for example, infinitely large (i.e., the tangent at the connection point P1 is a perpendicular line). In one embodiment, in the first light guide plate 110, the portion between the connection point P1 and the first body 111 can be defined as the first connecting segment 1122, and the portion after the connection point P1 can be defined as the first tail segment 1121. The aforementioned slope is, for example, the slope of the tangent line (as shown by tangent lines S11 and S12) at any point on the surface of the first connecting segment 1122 and / or at any point on the surface of the first tail segment 1121.

[0049] like Figure 4A As shown, the first connecting segment 1122 is connected to the first body 111 at connection point P12. The slope of the tangent at connection point P12 is, for example, 0, that is, the tangent at connection point P12 is a horizontal line. In the first light guide plate 110, the portion between connection point P12 and connection point P1 is the first connecting segment 1122.

[0050] like Figure 3 and Figure 4A As shown, the second light guide plate 120 includes a second body 121 and at least one second steering portion 122. The second body 121 is substantially parallel to the first body 111, but this is not the case in embodiments of the present invention. The second steering portion 122 includes a second tail section 1221 and a second connecting section 1222. The second connecting section 1222 connects the second tail section 1221 and the second body 121, wherein the second tail section 1221 at least partially overlaps with the second connecting section 1222 along a first direction Z.

[0051] like Figure 4A As shown, the second body 121 has a second body surface 121s (the second body surface 121s is shown in the figure). Figure 3 The second steering unit 122 has a second steering surface 122s (the second steering surface 122s is shown in the figure). Figure 3 The second body surface 121s has a third radius of curvature, and the second steering surface 122s has a fourth radius of curvature, wherein the third radius of curvature is greater than the fourth radius of curvature. In one embodiment, the entire second body surface 121s may be a plane or a combination of a plane and a curved surface, while the entire second steering surface 122s may be a curved surface or a combination of a plane and a curved surface. As long as the third radius of curvature is greater than the fourth radius of curvature, the embodiments of the present invention do not limit the geometry of the second body surface 121s and / or the second steering surface 122s. In one embodiment, the fourth radius of curvature may, for example, be between 1 mm and 1000 mm, such as 5 mm, 10 mm, 100 mm, 200 mm, etc.

[0052] In one embodiment, the aforementioned first radius of curvature and third radius of curvature may be different or equal, and / or the aforementioned second radius of curvature and fourth radius of curvature may be different or equal.

[0053] like Figure 4AAs shown, the slope of the second connecting segment 1222 is either positive or negative, while the slope of the second tail segment 1221 is either positive or negative (i.e., if the slope of the second connecting segment 1222 is positive, then the slope of the second tail segment 1221 is negative; if the slope of the second connecting segment 1222 is negative, then the slope of the second tail segment 1221 is positive). In this embodiment of the invention, the slope of the second connecting segment 1222 is described as negative, while the slope of the second tail segment 1221 is described as positive (i.e., the description is based on the example of the second connecting segment 1222 having a negative slope and the second tail segment 1221 having a positive slope). The second connecting segment 1222 and the second tail segment 1221 are connected at a connection point P2, and the slope of the connection point P2 is, for example, infinitely large (i.e., the tangent at the connection point P2 is a perpendicular line). In one embodiment, in the second light guide plate 120, the portion between the connection point P2 and the second body 121 can be defined as the second connecting segment 1222, while the portion after the connection point P2 can be defined as the second tail segment 1221. The aforementioned slope refers to the slope of the tangent line (as shown by tangent lines S21 and S22) at any point on the surface of the second connecting segment 1222 and / or at any point on the surface of the second tail segment 1221.

[0054] Furthermore, the definition of the second connecting segment 1222 is the same as that of the first connecting segment 1122 mentioned above, and will not be repeated here.

[0055] like Figure 4A As shown, the first tail segment 1121 and the second tail segment 1221 may contact each other along the first direction Z; however, in another embodiment, the first tail segment 1121 and the second tail segment 1221 may be spaced apart from each other along the first direction Z. Alternatively, the first tail segment 1121 and the second tail segment 1221 may be partially spaced apart and partially contact each other along the first direction Z.

[0056] like Figure 3As shown, the light source board 130 includes a first circuit board 131, a second circuit board 132, and a connecting plate 133. After the light source board 130, the first light guide plate 110, and the second light guide plate 120 are assembled, the first circuit board 131 overlaps with the first light guide plate 110, and the second circuit board 132 overlaps with the second light guide plate 120, for example, overlapping along a first direction Z, and the first circuit board 131 and the second circuit board 132 are located between the first light guide plate 110 and the second light guide plate 120. The connecting plate 133 connects the first circuit board 131 and the second circuit board 132. The connecting plate 133 can electrically connect the first circuit board 131 and the second circuit board 132. A signal from a controller (not shown) can be transmitted via a connection plate 133 to either the first circuit board 131 or the second circuit board 132 (i.e., the controller's signal can be transmitted via the connection plate 133 to either the first circuit board 131 or the second circuit board 132), and / or a signal from either the first circuit board 131 or the second circuit board 132 can be transmitted via the connection plate 133 to the controller. In another embodiment, the connection plate 133 may be omitted from the light source board 130, and the controller controls the first circuit board 131 and the second circuit board 132 respectively, or the signals from the first circuit board 131 and the second circuit board 132 are transmitted to the controller respectively.

[0057] In one embodiment, the light source board 130 is, for example, a flexible printed circuit (FPC). For instance, at least one of the first circuit board 131, the second circuit board 132, and the connecting board 133 is a flexible circuit board. Furthermore, each of the first circuit board 131, the second circuit board 132, and the connecting board 133 includes a substrate and at least one circuit (e.g., wiring, conductive vias, conductive pads, etc.), wherein the substrate is made of, for example, polyimide or other materials, and the circuit can be formed on the substrate using at least one semiconductor process and / or circuit board process. In one embodiment, the substrates of the first circuit board 131, the second circuit board 132, and the connecting board 133 are, for example, a single integrated substrate. In this way, different light sources are combined through this single integrated substrate, ensuring that when the light source is positioned on the substrate, the light source board 130 maintains a consistent brightness and chromaticity level (bin area), preventing excessive color difference (or reducing color difference) between multiple parts of the same light source board 130.

[0058] Although not shown, the light source board 130 also includes multiple light sources (e.g., light sources 234 described later), which can be disposed on the first circuit board 131 and the second circuit board 132. These light sources 234 can be configured corresponding to the first body 111, the first connecting segment 1122 and the first tail segment 1121 of the first light guide plate 110 and the second body 121, the second connecting segment 1222 and the second tail segment 1221 of the second light guide plate 120, so that the backlight module 100 becomes a ring-shaped backlight module.

[0059] like Figure 4A As shown, the carrier 20 has at least one recess 20r (the recess 20r is shown in the figure). Figure 2 The first tail segment 1121 is at least partially located within the recess 20r, and / or the second tail segment 1221 is at least partially located within the recess 20r. In this way, the recess 20r can restrain the first light guide plate 110 and the second light guide plate 120, preventing the light guide plate from easily separating from the carrier member 20.

[0060] like Figure 2 and Figure 4B As shown, the carrier 20 includes a first component 21 and a second component 22, which are connected. The first component 21 includes a third body 21A and at least one first connecting portion 21B, which is connected to the third body 21A. In one embodiment, the third body 21A and the first connecting portion 21B are, for example, integrally formed. The second component 22 includes a fourth body 22A and at least one second connecting portion 22B, which is connected to the fourth body 22A. In one embodiment, the fourth body 22A and the second connecting portion 22B are, for example, integrally formed. The carrier 20 is, for example, made of plastic or metal.

[0061] like Figure 4B As shown, the first connecting part 21B is, for example, a protrusion, while the second connecting part 22B has, for example, a recess. The first connecting part 21B can be fixed to (e.g., through interference fit) the recess of the second connecting part 22B to fix the relative position of the first component 21 and the second component 22.

[0062] Please refer to Figure 5 Its illustration Figure 4A A schematic diagram of another embodiment of the first tail section and the second tail section of the backlight device 1.

[0063] like Figure 5 As shown, the first steering portion 112' includes a first tail section 1121' and a first connecting section 1122. The first connecting section 1122 connects the first tail section 1121' and the first body 111, wherein the first tail section 1121' at least partially overlaps with the first connecting section 1122 along the first direction Z. The second steering portion 122' includes a second tail section 1221' and a second connecting section 1222. The second connecting section 1222 connects the second tail section 1221' and the second body 121, wherein the second tail section 1221' at least partially overlaps with the second connecting section 1222 along the first direction Z. Compared to Figure 4A The first tail segment 1121 and the second tail segment 1221, Figure 5The lengths of the first tail segment 1121' and the second tail segment 1221' are relatively short, therefore the overlap area R1 of the first tail segment 1121' and the second tail segment 1221' along the first direction Z is smaller. This saves material in the light guide plate. Furthermore, Figure 5 The lengths of the first tail segment 1121' and the second tail segment 1221' can be approximately equal.

[0064] Please refer to Figure 6 Its illustration Figure 4A A schematic diagram of another embodiment of the first tail section and the second tail section of the backlight device 1.

[0065] like Figure 6 As shown, the first steering portion 112' includes a first tail section 1121' and a first connecting section 1122. The first connecting section 1122 connects the first tail section 1121' and the first body 111, wherein the first tail section 1121' at least partially overlaps with the first connecting section 1122 along the first direction Z. The second steering portion 122'' includes a second tail section 1221'' and a second connecting section 1222. The second connecting section 1222 connects the second tail section 1221'' and the second body 121, wherein the second tail section 1221'' at least partially overlaps with the second connecting section 1222 along the first direction Z. Compared to Figure 5 The first tail segment 1121' and the second tail segment 1221', Figure 6 The lengths of the first tail segment 1121' and the second tail segment 1221'' are different, and the overlap area between the second tail segment 1221'' and the first connecting segment 1122 along the first direction Z is large.

[0066] In summary, the first steering portion and the second steering portion at least partially overlap along the first direction Z. For example, the first connecting segment of the first steering portion and the second connecting segment of the second steering portion at least partially overlap along the first direction Z, and / or the first tail segment of the first steering portion and the second tail segment of the second steering portion at least partially overlap along the first direction Z. Another example is that the first tail segment and the second connecting segment at least partially overlap along the first direction Z, and / or the second tail segment and the first connecting segment at least partially overlap along the first direction Z. Furthermore, the lengths of the first tail segment and the second tail segment may be equal or different. Additionally, the first tail segment and the second tail segment may be spaced apart from each other, or partially in contact and partially spaced. Moreover, the longer the tail segment of the light guide plate, the smaller the bending stress and the smaller the rebound force.

[0067] Please refer to Figure 7 The diagram illustrates an unfolded view of a backlight module 200 according to another embodiment of the present invention. Figure 2 The backlight module 100 of the backlight device 1 can be made by Figure 7 The backlight module 200 in the middle is replaced.

[0068] like Figure 7As shown, the backlight module 200 includes a first light guide plate 210, a second light guide plate 220, and a light source plate 230. The light source plate 230 includes a first circuit board 231, a second circuit board 232, and a plurality of light sources 234. After the light source plate 230, the first light guide plate 210, and the second light guide plate 220 are assembled, the first circuit board 231 and the first light guide plate 210 at least partially overlap (e.g., completely overlap in the direction perpendicular to the paper), and the second circuit board 232 and the second light guide plate 220 at least partially overlap (e.g., completely overlap in the direction perpendicular to the paper). In one embodiment, the light source plate 230 is, for example, a flexible circuit board; for example, at least one of the first circuit board 231 and the second circuit board 232 is a flexible circuit board. In another embodiment, the light source plate 230 may further include the aforementioned connecting plate 133, which mechanically connects and / or electrically connects the first circuit board 231 and the second circuit board 232. Some of these light sources 234 are configurable and electrically connected to the first circuit board 231, while others of these light sources 234 are configurable and electrically connected to the second circuit board 232.

[0069] like Figure 7 As shown, although not illustrated, light source 234 can be a side-emitting light source, for example, at least one of all sides of light source 234 is a light-emitting surface. Furthermore, each light source 234 can emit blue light, red light, green light, or any combination thereof in any proportion, such as white light. Any two of these light sources 234 can emit different or the same colors of light.

[0070] like Figure 7 As shown, each light source 234 has an optical axis, and an acute angle A is formed between the optical axes of two of these light sources 234. For example, the first circuit board 231 has opposing long sides 231L1 and 231L2 and opposing short sides 231S1 and 231S2, with long side 231L1 adjacent to short sides 231S1 and 231S2. Long side 231L2 is adjacent to the patterned light-shielding layer 213, and long side 231L2 is closer to the patterned light-shielding layer 213 than long side 231L1. In some light sources 234 near short side 231S1, an acute angle A is formed between the optical axes of the two light sources 234. Furthermore, these light sources with an acute angle A between their optical axes (e.g., light sources 234B, 234C) can be disposed in the first turning portion 212 of the first light guide plate 210. These light sources 234A, whose optical axes do not have an acute angle A, can be configured in the first body 211 of the first light guide plate 210.

[0071] like Figure 7As shown, three of these light sources 234 have a first optical axis, a second optical axis, and a third optical axis, respectively. The second optical axis and the first optical axis have a first angle, and the third optical axis and the first optical axis have a second angle, which are different from each other. For example, these light sources 234 include light sources 234A, 234B, and 234C, wherein light sources 234A, 234B, and 234C have a first optical axis M1, a second optical axis M2, and a third optical axis M3, respectively. The second optical axis M2 and the first optical axis M1 have a first angle A1, and the third optical axis M3 and the first optical axis M1 have a second angle A2, which are different from each other.

[0072] like Figure 7 As shown, in some embodiments, the closer the light source 234 is to the short side 231S1 of the light source plate, the larger the angle between its optical axis and the first optical axis M1 (the corresponding light source 234A is disposed in the first body 211 of the first light guide plate 210). Taking light sources 234C and 234B as examples, the angle between the third optical axis M3 of light source 234C and the first optical axis M1 of light source 234A is A2, while the angle between the second optical axis M2 of light source 234B and the first optical axis M1 of light source 234A is A1. Since light source 234C with the third optical axis M3 is closer to the short side 231S1 than light source 234B with the second optical axis M2, the second angle A2 is greater than the first angle A1. In this way, by adjusting the orientation of these light sources 234 located in the turning section in conjunction with the turning (for example, the configuration angle of light source 234B is different from that of light source 234A), the interference of light emitted by these light sources 234 (light sources located in the turning section) is reduced.

[0073] like Figure 7 As shown, in some embodiments, the light source closer to the short side 231S1 of the light source plate 230 is also closer to the long side 231L1. For example, the light source 234C with the third optical axis M3 is closer to the short side 231S1 than the light source 234B with the second optical axis M2, and therefore the light source 234C with the third optical axis M3 is closer to the long side 231L1 than the light source 234B with the second optical axis M2. In this way, the degree of interference between the light emitted by these light sources can be reduced.

[0074] The light sources 234 near the short side 231S2 have the same or similar technical features as those of the light sources 234 near the short side 231S1, which will not be described in detail here. Furthermore, as... Figure 7 As shown, the first circuit board 231 and / or the first light guide plate 210 are, for example, left-right symmetrical structures, and / or the second circuit board 232 and / or the second light guide plate 220 are, for example, left-right symmetrical structures.

[0075] like Figure 7As shown, in some embodiments, the first light guide plate 210 has a patterned light-shielding layer 213 (e.g., the dotted area of ​​an icon). Furthermore, the patterned light-shielding layer 213 is adjacent to the short sides 231S1, 231S2, and 231L2. For example, the patterned light-shielding layer 213 is adjacent to a portion of the short side 231S1, a portion of the short side 231S2, and at least a portion of the long side 231L2, such that the patterned light-shielding layer 213 is biased to one side of the first light guide plate 210. Additionally, the areas of the light sources 234 projected onto the first light guide plate 210 (e.g., along the direction perpendicular to the paper plane) may not completely overlap with the patterned light-shielding layer 213, or may partially overlap.

[0076] like Figure 7 As shown, the patterned light-shielding layer 213 includes, for example, multiple ink dots, wherein the ink dots have a light-shielding effect. For example, the ink dots are black ink. The patterned light-shielding layer 213 is formed on the first light guide plate 210, for example, by inkjet printing or coating.

[0077] like Figure 7 As shown, the patterned light-shielding layer 213 includes multiple light-shielding particles, such as ink dots. The ink dots are, for example, black ink. The patterned light-shielding layer 213 is formed on the first light guide plate 210, for example, by inkjet printing or coating. Furthermore, the patterned light-shielding layer 213 can be divided into multiple regions, and these regions may have the same or different particle densities. For example, the patterned light-shielding layer 213 can be divided into a first region 213A and a second region 213B. The first region 213A has a first particle density, while the second region 213B has a second particle density, wherein the first particle density and the second particle density are different. In this embodiment, the first region 213A is located at the first tail section 2121 of the first turning portion 212, and the second region 213B is located at the first connecting section 2122 of the first turning portion 212.

[0078] In one embodiment, the first particle density of the first region 213A is greater than the second particle density of the second region 213B, thereby homogenizing the light output brightness of the tail region. Specifically, with... Figure 4A For example, Figure 7 Multiple light sources 234 can be configured in Figure 4A The light guide plate has a first tail section 1121 and a second tail section 1221, where the light emitted by the light source 234 on the first tail section 1121 and the light emitted by the light source 234 on the second tail section 1221 intersect, resulting in enhanced light output brightness. However, since the first particle density of the first region 213A is greater than the second particle density of the second region 213B, the light transmittance of this region is reduced, thereby reducing the brightness of the aforementioned intersecting light and making the overall light output brightness of the light guide plate more uniform.

[0079] The second light guide plate 220 includes the same or similar technical features as the first light guide plate 210, which will not be described in detail here.

[0080] Furthermore, although the aforementioned Figure 3 The light source, etc., are not shown, but Figure 3 The light source panel 130 also includes multiple light sources whose characteristics (e.g., configuration relationships, etc.) are the same as or similar to those of... Figure 7 The light sources 234 of the light source board 230 will not be described in detail here.

[0081] Please refer to Figures 8-10 , Figure 8 A partial cross-sectional schematic diagram of a backlight module 300 according to an embodiment of the present invention is shown. Figure 9 A partial cross-sectional schematic diagram of a backlight module 400 according to another embodiment of the present invention is shown, while Figure 10 A partial cross-sectional schematic diagram of a backlight module 500 according to another embodiment of the present invention is shown.

[0082] Either the aforementioned backlight module 100 or backlight module 200 may have the following characteristics: Figures 8-10 A partial cross-section of a backlight module and its corresponding technical features.

[0083] like Figure 8 As shown, the backlight module 300 can be bonded to the carrier 20 via an adhesive layer 350. The adhesive layer 350 is, for example, double-sided adhesive. The thickness of the adhesive layer 350 is, for example, 0.05 mm. The backlight module 300 includes at least a first circuit board 331, at least one light source 234, a first light guide plate 310, a reflective layer 340, and a gradient film 313. The first light guide plate 310 has opposing first surfaces 310s1 and second surfaces 310s2. The gradient film 313 is disposed on the first surface 310s1 of the first light guide plate 310, while the reflective layer 340 is disposed on the second surface 310s2 of the first light guide plate 310 and can reflect the light emitted from the light source 234. The first light guide plate 310 has at least one through hole 310a, in which the light source 234 can be disposed. The first circuit board 331 can be disposed on the reflective layer 340. In this embodiment, the reflective layer 340 can be pre-configured on the second surface 310s2 of the first light guide plate 310, and then the first circuit board 331 is configured on the reflective layer 340.

[0084] like Figure 9As shown, the backlight module 400 can be bonded to the carrier 20 via the adhesive layer 350. The backlight module 400 includes at least a first circuit board 431, at least one light source 234, a first light guide plate 310, a reflective layer 440, and a gradient film 313. The first light guide plate 310 has opposing first surfaces 310s1 and second surfaces 310s2. The gradient film 313 is disposed on the first surface 310s1 of the first light guide plate 310, while the reflective layer 340 is disposed on the second surface 310s2 of the first light guide plate 310 and can reflect the light emitted from the light source 234. The first light guide plate 310 has at least one through hole 310a, in which the light source 234 can be disposed. The first circuit board 431 can be disposed on the reflective layer 440. In this embodiment, the reflective layer 440 can be pre-disposed on the first circuit board 431, and then the first circuit board 431 is connected to the second surface 310s2 of the first light guide plate 310 through the reflective layer 440.

[0085] like Figure 10 As shown, the backlight module 500 can be bonded to the carrier 20 via the adhesive layer 350. The backlight module 500 includes at least a first circuit board 431, at least one light source 234, a reflective layer 440, and a gradient film 313. The backlight module 500 includes the same or similar technical features as the aforementioned backlight module 400, with at least one difference in that the backlight module 500 may omit the first light guide plate 310, that is, there is a space, such as an air layer, between the gradient film 313 and the reflective layer 440.

[0086] In one embodiment, Figures 8-10 The thickness t1 of the gradient film 313 shown is, for example, 0.1 mm, the thickness t2 of the first light guide plate 310 is, for example, 0.3 mm, the thickness t3 of the reflective layer 340 and the reflective layer 440 is, for example, 0.05 mm, and the thickness t4 of the first circuit board 331 and the first circuit board 431 is, for example, 0.3 mm.

[0087] Please refer to Figure 11 The diagram illustrates a partial cross-sectional view of a backlight device 2 according to another embodiment of the present invention.

[0088] like Figure 11As shown, the backlight device 2 includes a housing 10, a carrier 41, a backlight module 600, and a diffuser 30. The backlight module 600 includes the technical features of any of the aforementioned backlight modules 100-500, or is itself any of the aforementioned backlight modules 100-500. The carrier 41 includes a first component 41A and a second component 41B, which can be joined together to prevent easy separation. The first component 41A includes a third body 41A1 and a third turning portion 41A2, wherein the third turning portion 41A2 is connected to the third body 41A1 and overlaps with the third body 41A1 along the first direction Z. The second component 41B includes a fourth body 41B1 and a fourth turning portion 41B2, wherein the fourth turning portion 41B2 is connected to the fourth body 41B1 and overlaps with the fourth body 41B1 along the first direction Z. The first tail section 6121 of the first light guide plate and the second tail section 6221 of the second light guide plate of the backlight module 600 can be located between the third turning part 41A2 and the fourth turning part 41B2.

[0089] like Figure 11 As shown, the light amplifying element 30 covers the backlight module 600. The light amplifying element 30 can increase the optical performance of the light emitted from the backlight module 600, for example, by increasing the uniformity of light emission. In addition, the light amplifying element 30 can also be applied to any of the aforementioned backlight modules 100 to 500.

[0090] like Figure 11 As shown, the carrier 41 includes at least one limiting portion 43. The limiting portion 43 includes a first limiting segment 43A and a second limiting segment 43B. The first limiting segment 43A is connected to one of the third steering portion 41A2 and the fourth steering portion 41B2 (in this embodiment, the first limiting segment 43A is connected to the fourth steering portion 41B2, but this is not a limitation; in another embodiment, the first limiting segment 43A may also be connected to the third steering portion 41A2) and extends substantially along a first direction Z. The second limiting segment 43B is connected to the first limiting segment 43A and extends along a second direction X, where the second direction Z is substantially perpendicular to the first direction X. Thus, the first component 41A and the second component 41B are not easily separated. Furthermore, the first limiting segment 43A passes through the through hole 6221a of the second tail segment 6221, the through hole 6121a of the first tail segment 6121, and the through hole 41A2a of the third steering portion 41A2. The length of the first limiting segment 43A along the second direction X is greater than the inner diameter of the through hole 41A2a along the second direction X, so that the first part 41A and the limiting part 43 do not easily separate. In addition, the carrier 20 of the aforementioned embodiment can also be replaced by the carrier 41 of this embodiment.

[0091] In summary, embodiments of the present invention provide a backlight module and a backlight device using the same. The backlight module includes at least two light guide plates, each light guide plate including a body and a turning portion. The turning portion includes a tail section and a connecting section, and the connecting section connects the tail section and the body. In one embodiment, the tail section overlaps with the connecting section in a direction, such as the stacking direction of the two light guide plates. In another embodiment, the lengths of the two tail sections of the two light guide plates may be equal or different, and / or the lengths of the two connecting sections of the two light guide plates may be equal or different. In another embodiment, the two tail sections of the two light guide plates may at least partially overlap in the stacking direction, and / or the two connecting sections of the two light guide plates may at least partially overlap in the stacking direction. In other embodiments, the tail section of one of the two light guide plates may be omitted. The present invention, by utilizing the overlapping feature of the tail section and the connecting section, enables light to be emitted from the side of the backlight module, thereby increasing the light emission range of the backlight module.

[0092] Although the invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the invention and should not be construed as limiting the invention. The scale in the schematic drawings does not represent the actual proportions of the components, in order to clearly describe the required parts.

[0093] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A backlight module, characterized in that, include: A first light guide plate, the first light guide plate comprising: The first entity; and A first steering unit, the first steering unit comprising: The first tail section; and A first connecting segment connects the first tail segment and the first body, wherein the first tail segment overlaps the first connecting segment along a first direction; A second light guide plate, which is configured opposite to the first light guide plate; and A light source board, which is disposed on the first light guide plate and the second light guide plate; The first direction is perpendicular to the extension direction of the first body.

2. The backlight module according to claim 1, characterized in that, The first body has a first radius of curvature, and the first steering part has a second radius of curvature, wherein the first radius of curvature is greater than the second radius of curvature.

3. The backlight module according to claim 2, characterized in that, The second radius of curvature is between 1 mm and 1000 mm.

4. The backlight module according to claim 2, characterized in that, The slope of the first connecting segment is either positive or negative, while the slope of the first tail segment is either positive or negative.

5. The backlight module according to claim 2, characterized in that, The first connecting segment and the first tail segment are connected at a connection point, and the slope of the connection point is infinitely large.

6. The backlight module according to claim 1, characterized in that, The light source board includes: A first circuit board, which overlaps with the first light guide plate; and The second circuit board overlaps with the second light guide plate.

7. The backlight module according to claim 6, characterized in that, The light source board also includes: A connecting plate that connects the first circuit board and the second circuit board.

8. The backlight module according to claim 1, characterized in that, The light source board includes multiple light sources, each with an optical axis, and an acute angle is formed between the optical axes of two of these light sources.

9. The backlight module according to claim 1, characterized in that, The light source board includes multiple light sources, three of which have a first optical axis, a second optical axis and a third optical axis respectively. The second optical axis has a first angle with the first optical axis, and the third optical axis has a second angle with the first optical axis. The first angle and the second angle are different.

10. The backlight module according to claim 9, characterized in that, The light source board has a short side, the light source with the third optical axis is closer to the short side than the light source with the second optical axis, the light source with the second optical axis is closer to the short side than the light source with the first optical axis, and the second included angle is greater than the first included angle.

11. The backlight module according to claim 10, characterized in that, The light source board has a long side adjacent to the short side. The light source with the third optical axis is closer to the long side than the light source with the second optical axis, and the light source with the second optical axis is closer to the long side than the light source with the first optical axis.

12. The backlight module according to claim 1, characterized in that, The second light guide plate includes: A second body, which is parallel to the first body; and The second steering unit includes: The second tail section; and The second connecting segment connects the second tail segment and the second body, wherein the second tail segment overlaps with the second connecting segment along the first direction.

13. The backlight module according to claim 12, characterized in that, The first body has a first radius of curvature, the first steering part has a second radius of curvature, and the first radius of curvature is greater than the second radius of curvature; the second body has a third radius of curvature, the second steering part has a fourth radius of curvature, and the third radius of curvature is greater than the fourth radius of curvature; the fourth radius of curvature is different from or the same as the second radius of curvature.

14. The backlight module according to claim 12, characterized in that, The first tail segment and the second tail segment are spaced apart from each other along the first direction.

15. The backlight module according to claim 12, characterized in that, The length of the first tail segment is different from the length of the second tail segment.

16. The backlight module according to claim 1, characterized in that, The light source plate includes multiple light sources, and the first light guide plate has a patterned light-shielding layer. The projection areas of the multiple light sources on the first light guide plate do not overlap with the patterned light-shielding layer at all.

17. The backlight module according to claim 1, characterized in that, The first light guide plate has a first short side and a second short side opposite to each other, and a long side adjacent to the first short side and the second short side. The first light guide plate includes a patterned light-shielding layer adjacent to the first short side, the second short side and the long side.

18. A backlight device, characterized in that, include: Load-bearing components; as well as The backlight module as described in any one of claims 1 to 17, wherein the backlight module is disposed on the carrier.

19. The backlight device according to claim 18, characterized in that, The carrier has a recess, and the first tail section is at least partially located within the recess.

20. The backlight device according to claim 18, characterized in that, Also includes: An adhesive component that bonds the backlight module to the carrier component.

21. The backlight device according to claim 18, characterized in that, Also includes: The housing covers the backlight module and the carrier.

22. The backlight device according to claim 18, characterized in that, The support component includes: A third body, which overlaps with the first body along the first direction; The third steering part is connected to the third body and overlaps with the third body along the first direction; A fourth body, which overlaps with the second body along the first direction; and The fourth steering part is connected to the fourth body and overlaps with the fourth body along the first direction; The first tail section of the first light guide plate and the second tail section of the second light guide plate are located between the third turning section and the fourth turning section.

23. The backlight device according to claim 22, characterized in that, The carrier includes a limiting part, which includes: A first limiting segment, the first limiting segment being connected to one of the third steering portion and the fourth steering portion and extending along the first direction; and The second limiting segment is connected to the first limiting segment and extends along the second direction; The second direction is perpendicular to the first direction.

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