Light guide piece and backlight module
By using curved light guides and fin structures in the mouse backlight module, the problem of insufficient light source illumination of back characters or patterns is solved, achieving a longer distance and multi-directional light emission effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2026-03-31
Smart Images
Figure CN121763483A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a light guide and a backlight module, and more particularly to a light guide with a curved surface and a backlight module having the same light guide. Background Technology
[0002] Traditionally, mice typically place brand or trademark characters or logos on the top shell. This allows a light source on the upper surface of the circuit board to illuminate the characters or logos directly. However, with varying design variations, when the characters or logos are located on the bottom back of the mouse, the circuit board is usually positioned parallel to the bottom, preventing the upward or downward light source from fully illuminating them. Summary of the Invention
[0003] The main objective of this invention is to provide a light guide that, by providing a curved surface on the opposite side of the light incident surface, can transmit light laterally over a large angle range.
[0004] According to one aspect of the present invention, a light guide is provided, comprising:
[0005] The body has a first side and a second side that are opposite each other;
[0006] A light-incident surface, which is disposed on the first side of the body;
[0007] The light-emitting surface and the light-receiving surface are located at opposite ends of the body, respectively; and
[0008] A curved surface, the curved surface being disposed on the second side of the body corresponding to the light-incident surface,
[0009] The vertical projection of the incident light surface overlaps with the curved surface.
[0010] As an optional technical solution, the curved surface extends in a fan shape toward the light-emitting surface, and the vertical projection of the curved surface does not overlap with the light-emitting surface.
[0011] As an optional technical solution, the light guide also includes a reflective layer, wherein the reflective layer is disposed on the curved surface.
[0012] As an optional technical solution, the light guide also includes a channel, wherein the channel is disposed on the body and adjacent to the curved surface.
[0013] As an optional technical solution, the body includes multiple fins arranged along the periphery of the body, and the light-emitting surface is disposed on the multiple fins.
[0014] As an optional technical solution, the upper surface of each fin is raised upward relative to the light-incident surface and parallel to the light-incident surface.
[0015] As an optional technical solution, each fin has a beveled surface as the light-emitting surface, and the beveled surface is inclined from the end of the corresponding fin toward the curved surface.
[0016] As an optional technical solution, the first side of the body includes a plane, and a tangent plane parallel to the plane defines the part of the curved surface closest to the plane. The light-incident surface is a part of the plane and is located between the part of the curved surface and the light-out surface.
[0017] According to another aspect of the present invention, a backlight module is provided, comprising:
[0018] The light guide mentioned above; and
[0019] A light source, which is positioned corresponding to the incident light surface and the curved surface;
[0020] The light emitted by the light source enters the light guide from the light incident surface, and the curved surface is used to reflect the light entering the light guide toward the light exiting surface.
[0021] As an optional technical solution, the first side of the body includes a plane, and a tangent plane parallel to the plane defines the part of the curved surface closest to the plane. The center point of the light source is located between this part of the curved surface and the light-emitting surface.
[0022] As an optional technical solution, the light-emitting surface of the light source is adjacent to the portion of the curved surface that is closest to the plane.
[0023] As an optional technical solution, the light-incident surface and the light-exit surface are located at the light-incident end and the light-exit end of the light guide, respectively, and the light-exit direction of the light source intersects the light transmission direction from the light-incident end to the light-exit end.
[0024] According to another aspect of the present invention, another backlight module is provided, comprising:
[0025] The light guide described above includes a plurality of curved surfaces, and further includes a channel disposed between two adjacent curved surfaces; and
[0026] Multiple light sources are provided, each corresponding to a different curved surface located on the incident light surface.
[0027] As an optional technical solution, complementary colors of light are provided by two adjacent light sources among the multiple light sources set for two adjacent surfaces in the multiple curved surfaces.
[0028] In summary, compared to prior art, the light guide of the present invention has a curved surface that can reflect light laterally over a wider angle range to a greater distance. Furthermore, the light guide of the present invention can also provide multi-directional light emission through the fin-shaped light-emitting surface, thereby enhancing the light emission effect.
[0029] 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
[0030] Figure 1 This is a perspective view of a mouse device according to an embodiment of the present invention.
[0031] Figure 2 for Figure 1 A cross-sectional view of the back of the mouse device.
[0032] Figure 3 This is a three-dimensional schematic diagram of a light guide component according to an embodiment of the present invention from a top view.
[0033] Figure 4 for Figure 3 A three-dimensional schematic diagram of the central light guide component from an upward viewing angle.
[0034] Figure 5 for Figure 3 A planar schematic diagram of the central light guide component.
[0035] Figure 6 This is a cross-sectional schematic diagram of a light guide component according to an embodiment of the present invention.
[0036] Figure 7 and Figure 8 These are exploded views of the back side of a mouse device without a back cover according to an embodiment of the present invention, viewed from a top-down and bottom-up perspective.
[0037] Figure 9 and Figure 10 These are, respectively, a top-view partially exploded view and a combined view of the back side portion of a mouse device without a back cover, according to another embodiment of the present invention.
[0038] Figures 11 to 13 This is a planar schematic diagram of the backlight module according to different embodiments of the present invention. Detailed Implementation
[0039] This invention primarily relates to a light guide with a curved surface, a backlight module with the same light guide, and an electronic device. The curved surface design of the light guide allows light to be reflected and transmitted laterally over a wider angle range, thereby improving the light emission effect. Please refer to [reference needed]. Figure 1 and Figure 2 , Figure 1 This is a perspective view of a mouse device according to an embodiment of the present invention, and Figure 2 for Figure 1A cross-sectional view of the back of the mouse device. Note that... Figure 1 Although a mouse device is used as an input device / electronic device in this description, it is not limited thereto. Any electronic device that utilizes the light guide element of this invention falls within the scope of this invention. Figure 1 and Figure 2 As shown, in one embodiment, the mouse device 1 includes a housing 10, a light guide 20, a circuit board 30, a first light source 40U, and a second light source 40B. The housing 10 includes an upper housing 110 and a lower housing 120, which are joined together to form an accommodating space 100. The accommodating space 100 is used to accommodate various components of the mouse device 1, such as the circuit board 30, the first light source 40U, the second light source 40B, the light guide 20, the scroll wheel 50, and button switches (not shown). In one embodiment, the upper housing 110 may include a front cover 111, a back cover 112, and a side cover 113. In this embodiment, the mouse device 1 is defined with a front side FS and a back side BS according to the position of the fingers and palm during operation; for example, the part closer to the fingers is the front side FS, and the part closer to the palm is the back side BS. A front cover 111 and a back cover 112 are respectively disposed on the front side FS and the back side BS, and two side covers 113 are respectively disposed on the left and right sides of the mouse device 1 to connect the front cover 111 and the back cover 112 to the lower housing 120, but this is not a limitation. Depending on the actual application, the upper housing 110 may integrate the front cover 111, the back cover 112, and / or the side covers 113 to reduce the number of parts or improve the appearance design. For example, the front cover 111 and the back cover 112 may be integrated into a single upper cover and connected to the lower housing 120 via the side covers 113; in another embodiment, the upper housing 110 may also be a single housing including the front cover 111, the back cover 112, and the side covers 113. The mouse device 1 has a light-transmitting portion 130, which is disposed on the back side BS near the lower housing 120, for example, below the back cover 112. In one embodiment, the light-transmitting portion 130 may be in the form of characters or patterns. The lower housing 120 can serve as the base of the mouse device 1 and has a support or positioning structure for mounting, fixing or positioning various components.
[0040] like Figure 2As shown, the circuit board 30 is preferably disposed parallel to the lower housing 120 in the accommodating space 100. In other words, the extension direction of the circuit board 30 is substantially parallel to that of the lower housing 120. In one embodiment, the circuit board 30 may be a flexible printed circuit board, but is not limited thereto. Multiple light sources (e.g., a first light source 40U above and a second light source 40B below) may be disposed on the upper and lower surfaces of the circuit board 30 respectively (i.e., the first light source 40U is disposed on the upper surface of the circuit board 30, and the second light source 40B is disposed on the lower surface of the circuit board 30) and electrically connected to the circuit board 30 to receive power to drive the light sources to emit light. The light source is preferably a top-emitting light source, such as a single-chip or multi-chip light-emitting diode, a small light-emitting diode, or a micro light-emitting diode, wherein more than 50% of the light is emitted from the top surface of the light source, but is not limited thereto. Depending on the actual application, the light source may also be a side-emitting light source, and the light source may be selectively disposed only on the lower surface of the circuit board 30 and not on the upper surface of the circuit board 30, for example, only the lower second light source 40B. In one embodiment, light emitted upwards from the first light source 40U disposed on the upper surface of the circuit board 30 can directly illuminate the light-transmitting portion 130 towards the back cover 112. Light emitted downwards from the second light source 40B disposed on the lower surface of the circuit board 30 can be transmitted laterally and illuminated towards the light-transmitting portion 130 via the light guide 20. In this embodiment, the light guide 20 is disposed below the circuit board 30 (or the second light source 40B below it), and the extending direction (or light transmission direction) of the light guide 20 is substantially parallel to the circuit board 30. The light guide 20 has a curved surface 230, such that after the light emitted downwards from the second light source 40B disposed below the circuit board 30 enters the light guide 20, the curved surface 230 can transmit the light entering the light guide 20 laterally. The light guide 20 of the present invention and the backlight module BL including this light guide will be described in detail later.
[0041] Please refer to Figures 3 to 6 ,in Figure 3 This is a three-dimensional schematic diagram of a light guide component according to an embodiment of the present invention from a top view. Figure 4 for Figure 3 A three-dimensional schematic diagram of the central light guide component from an upward viewing angle. Figure 5 for Figure 3 A planar schematic diagram of the central light guide component. Figure 6 This is a cross-sectional schematic diagram of a light guide component according to an embodiment of the present invention.
[0042] like Figures 3 to 6As shown, the light guide 20 includes a body 200, a light-incident surface 210, a light-exiting surface 220, and a curved surface 230. The body 200 has opposing first sides 201 and second sides 202, such as an upper side and a lower side. The light-incident surface 210 is disposed on the first side 201 (e.g., the upper side) of the body 200. The light-exiting surface 220 and the light-incident surface 210 are respectively located at opposite ends of the body 200, such as the light-exiting end OE and the light-incident end IE. The curved surface 230 is disposed on the second side 202 (e.g., the lower side) of the body 200 corresponding to the light-incident surface 210, and the vertical projection of the light-incident surface 210 overlaps with the curved surface 230.
[0043] Specifically, the light guide 20 (or body 200) can be made of any suitable optical material, such as polycarbonate (PC), polymethyl methacrylate (PMMA), or polystyrene (PS), but is not limited thereto. In this embodiment, the body 200 of the light guide 20 preferably has a profile corresponding to the back side BS of the lower housing 120, such as an arcuate profile, and the light-incident surface 210, the light-emitting surface 220, and the curved surface 230 are surfaces formed on corresponding portions of the body 200. For example, the light-incident surface 210 and the light-incident end IE are adjacent to the inner arcuate side of the body 200, while the light-emitting surface 220 and the light-emitting end OE are adjacent to the outer arcuate side of the body 200. In one embodiment, the light-incident surface 210 and the light-emitting surface 220 do not overlap. The curved surface 230 is located below the light-incident surface 210 and between the light-incident end IE and the light-emitting end OE. Furthermore, the body 200 may include multiple fins 240. The multiple fins 240 are arranged along the periphery of the body 200, and the light-emitting surface 220 is disposed on the multiple fins 240. In other words, the light-emitting end OE of the light guide 20 may be designed as multiple radially extending fins 240, so that the light emitted by the second light source 40B is transmitted through the light guide 20 and emitted from the multiple fins 240, but this is not a limitation. Although the figure illustrates that the body 200 includes 7 fins, this is not a limitation. Depending on the actual application, the body 200 may include more or fewer than 7 fins 240, or even no fins 240.
[0044] In one embodiment, the first side 201 of the body 200 includes a plane 210P, and the light-incident surface 210 is a portion of the plane 210P. For example, the upper surface of the body 200 is preferably the plane 210P, such that the upper surface near the light-incident end IE can serve as the light-incident surface 210. Figure 5As shown, the light-incident surface 210 is preferably the portion of the plane 210P of the body 200 extending from the light-incident end IE towards the light-outceasing end OE, close to the light-incident end IE. The curved surface 230 is disposed on the opposite side (e.g., the lower side) of the body 200 corresponding to the light-incident surface 210, such that the light-incident surface 210 and the curved surface 230 overlap in the thickness direction of the body 200, that is, the vertical projection of the curved surface 230 onto the upper surface of the body 200 at least partially overlaps with the light-incident surface 210. For example, in this embodiment, three curved surfaces 230 are respectively disposed along the arcuate contour of the body 200 on the lower side of the body 200 to correspond to the three light-incident surfaces 210 on the upper side of the body 200, but this is not a limitation. The number of curved surfaces 230 and light-incident surfaces 210 can be changed to less than or more than three depending on the actual application. Figure 4 and Figure 5 As shown in the plan view, the curved surface 230 extends in a fan shape towards the light-emitting surface 220, and the vertical projection of the curved surface 230 does not overlap with the light-emitting surface 220; for example, the vertical projection of the curved surface 230 does not overlap with the multiple fins 240. Depending on the light emission requirements, the curvature and fan area of the multiple curved surfaces 230 can be the same or different. From another perspective, in the plan view, the curved surface 230 extends horizontally radially towards the light-emitting surface 220, so that the direction of light travel on the curved surface 230 is also horizontally radial. In this way, the curved surface 230 can reflect light to the light-emitting surface 220 over a larger horizontal angle range, allowing the light to travel further laterally. Less light travels laterally outside the straight boundaries on both sides of the curved surface 230 (e.g., the straight lines on both sides of the fan). Therefore, the direction of light transmission can be adjusted by controlling the fan area of the curved surface 230 (e.g., the central angle of the fan or the length of the side of the fan).
[0045] In one embodiment, such as Figure 4 and Figure 6 As shown, the curved surface 230 can be considered as an inner surface recessed from the lower surface of the body 200 to form a cup-like portion. The curved surface 230 is designed to reflect light laterally over a wider angle range, thus the cup-like portion containing the curved surface 230 can also be called a reflective cup. For example, the curved surface 230 can be a low-curvature single-curvature or hyperboloid surface, and the curvature of the curved surface 230 can be adjusted according to the thickness of the light guide 20 (body 200) and its distance from the light-emitting surface 220. Here, the thickness of the light guide 20 refers to the maximum distance or thickness of the body 200 between the first side 201 and the second side 202 (e.g., the upper / lower surfaces). For example, as... Figure 6As shown, when the thickness T of the light guide 20 is 2 mm, the radius of curvature R of the curved surface 230 (e.g., the distance from the curvature center CC to the curved surface 230) is preferably 5–20 mm, so that the curved surface 230 produces total internal reflection between approximately 40–65 degrees of emission angle, which is beneficial for controlling the amount of light emitted. When the thickness T of the light guide 20 is 3 mm, the radius of curvature R of the curved surface 230 is preferably 10–30 mm, so that the curved surface 230 produces total internal reflection between approximately 40–65 degrees of emission angle, which is beneficial for controlling the amount of light emitted. When the thickness T of the light guide 20 is 4 mm, the radius of curvature R of the curved surface 230 is preferably 10–30 mm, so that the curved surface 230 produces total internal reflection between approximately 40–65 degrees of emission angle, which is beneficial for controlling the amount of light emitted. When the thickness T of the light guide 20 is 5 mm, the radius of curvature R of the curved surface 230 is preferably 10–30 mm to achieve total internal reflection within an emission angle of approximately 40–70 degrees, which is beneficial for controlling the amount of light emitted. From another perspective, the radius of curvature R of the curved surface 230 is preferably approximately 2–10 times the thickness T of the light guide 20, but is not limited to this. Depending on the actual application, the radius of curvature R of the curved surface 230 can be less than 2 times or more than 10 times the thickness T of the light guide 20.
[0046] Furthermore, such as Figure 3 and Figure 6 As shown, the upper surface 244 of each fin 240 is preferably raised relative to the light-incident surface 210, and the upper surface 244 of the fin 240 is substantially parallel to the light-incident surface 210. Each fin 240 preferably has a bevel 242, and the bevel 242 is inclined from the end of the corresponding fin 240 toward the curved surface 230. For example, the bevel 242 is inclined from below the end face 246 of the fin 240 toward the light-incident end IE direction. In one embodiment, the surfaces of the fin 240 (e.g., the upper surface 244, the bevel 242, and the end face 246) can all serve as light-emitting surfaces 220, so that light can be emitted from multiple directions (e.g., the upper side, the lower side, and the dorsal end) to enhance the light emission effect. After the light emitted by the second light source 40B enters the light guide 20 (body 200) from the light incident surface 210, the curved surface 230 is used to reflect the light entering the light guide 20 toward the fin 240, and the light is nearly totally internally reflected in the fin 240 so that it exits from the upper surface 244, the inclined surface 242 and the end surface 246 of the fin 240.
[0047] Furthermore, such as Figure 6As shown, the tangent plane TP of the plane 210P of the first side 201 of the parallel body 200 defines the portion CP of the curved surface 230 closest to the plane 210P. The incident light surface 210 is preferably located between the portion CP of the curved surface 230 closest to the plane 210P and the emitting light surface 220. For example, the portion CP of the curved surface 230 is essentially the portion of the body 200 with the minimum thickness, and this portion CP can be a line or a point. When the curved surface 230 is a single curved surface, this portion CP can be a line on the curved surface 230. When the curved surface 230 is a hyperboloid, this portion CP can be a point on the curved surface 230. From another viewpoint, the center point C of the second light source 40B is preferably located between the portion CP of the curved surface 230 closest to the plane 210P and the emitting light surface 220. In this way, surface 230 can reflect most of the light rays towards the output end OE, while only a small portion or almost no light rays will be reflected by surface 230 towards the input end IE. From another perspective, the portion CP of surface 230 closest to plane 210P can be defined by the normal of plane 210P through the center of curvature CC of surface 230 on the second side 202 (e.g., the lower side), marking the deepest point of surface 230. Here, the deepest point of surface 230 refers to the part that is most deeply recessed relative to the lower surface of body 200. Figure 5 As shown, multiple second light sources 40B are respectively disposed on the light-incident surface 210 corresponding to multiple curved surfaces 230, and each second light source 40B is located on the light-incident surface 210 adjacent to the light-incident end IE of the corresponding curved surface 230. In one embodiment, the vertical projection of the second light source 40B preferably does not overlap with the portion CP of the curved surface 230 closest to the plane 210P. The light emission direction of the second light source 40B intersects the light transmission direction from the light-incident end IE to the light-outceasing end OE of the light guide 20. For example, the second light source 40B is essentially downward emitting light, and the light transmission direction of the light guide 20 is essentially horizontal. The curved surface 230 can redirect the light entering the light guide 20 from downward to horizontal (e.g., Figure 5 The light is reflected to the light-emitting surface 220 from the left side.
[0048] In addition, such as Figure 6As shown, the light guide 20 may include a reflective layer 250, which is disposed on the curved surface 230. The reflective layer 250 is used to reflect light leaking from the lower side of the body 200 back to the light guide 20, thereby recovering light and improving the brightness of the emitted light. In one embodiment, the reflective layer 250 may be a reflective coating formed by coating a reflective material (e.g., white paint or white ink) on the curved surface 230, but is not limited thereto. In other embodiments, the reflective layer 250 may be a reflective film formed of a reflective material (e.g., a metal foil), or a non-reflective film coated with a reflective material, or a reflective sheet formed of a plastic film doped with reflective particles (e.g., a PET film doped with reflective particles). In another embodiment (not shown), the lower housing 120 may have a reflective protrusion at a position corresponding to the curved surface 230 that is complementary to the shape of the reflective cup, which can also achieve the effect of recovering light and improving the brightness of the emitted light.
[0049] Please refer to Figure 7 and Figure 8 ,in Figure 7 and Figure 8 These are exploded views of the back side of a mouse device (excluding the back cover) according to an embodiment of the present invention, viewed from a top-down and bottom-up perspective, respectively. Figure 7 and Figure 8 As shown, corresponding to the plurality of fins 240 of the light guide 20, the lower housing 120 preferably has a plurality of positioning portions 122. The plurality of positioning portions 122 protrude upward from the lower housing 120 and are spaced apart along the periphery of the lower housing 120 corresponding to the width of the fins 240. Thus, when the light guide 240 is disposed on the lower housing 120, each fin 240 can be inserted into the space between the corresponding positioning portions 122 to achieve a positioning effect. Furthermore, in this embodiment, the light guide 20 may include a channel 260, wherein the channel 260 may be configured as an adjacent curved surface 230. The sidewalls of the channel 260 can be used to reflect light. The arrangement of the channel 260 can change the direction of light travel. The channel 260 may be a through-hole extending through the thickness of the body 200 or a non-through-hole extending only to a portion of the thickness of the body 200. The depth and width of the channel 260 determine the amount of light emitted, while the shape of the channel 260 determines the direction of light directional change.
[0050] Please refer to Figure 9 and Figure 10 ,in Figure 9 and Figure 10 These are, respectively, a top-view partially exploded view and a combined view of the back side portion of a mouse device without a back cover, according to another embodiment of the present invention. Figure 9 and Figure 10As shown, the backlight module of the present invention may optionally include a light-shielding sheet 60. The light-shielding sheet 60 can be used to block (absorb or reflect) light emitted from the light guide member 20. For example, in this embodiment, the light-shielding sheet 60 is used to block light emitted upward from the light guide member 20. The light-shielding sheet 60 has an arcuate profile corresponding to a plurality of fins 240 of the body 200, and the light-shielding sheet 60 has a plurality of positioning holes 62. Corresponding to the positioning holes 62 of the light-shielding sheet 60, the lower housing 120 has a plurality of positioning posts 124. The positioning posts 124 are preferably disposed on the positioning portion 122. After the light guide member 20 is positioned on the lower housing 120 by means of the positioning portion 122, the light-shielding sheet 60 is positioned above the plurality of fins 240 by means of the positioning holes 62 fitting into the positioning posts 124.
[0051] Please refer to Figures 11 to 13 ,in Figures 11 to 13 This is a planar schematic diagram of the backlight module according to different embodiments of the present invention. Figure 11 As shown, when a single fin 240 corresponds to only one set of second light sources 40B and a reflector cup (i.e., curved surface 230), the curved surface 230 is preferably located on the longitudinal centerline of the fin 240 or adjacent to the longitudinal centerline of the fin 240. The second light source 40B is preferably located on the centerline of the light-emitting surface 220 or the curved surface 230. When the curved surface 230 is asymmetrical, the second light source 40B is preferably located off-center from the centerline of the curved surface 230, but this is not a limitation. In this embodiment, the second light source 40B may be composed of three chips 41, 42, and 43, and each of the three chips 41, 42, and 43 may emit light of the same color or different colors. In one embodiment, the three chips 41, 42, and 43 may preferably emit red, green, and blue light, respectively, but this is not a limitation.
[0052] like Figure 12 As shown, when a single fin 240 corresponds to multiple sets of second light sources 40B and reflectors (i.e., curved surfaces 230), and the light emission ranges of adjacent sets of second light sources 40B and curved surfaces 230 overlap, the two adjacent second light sources 40Bs corresponding to the two adjacent curved surfaces 230 preferably provide complementary colors of light. For example, the three chips 41, 42, and 43 of the second light source 40B on the left can emit red, green, and blue light, respectively. The three chips 44, 45, and 46 of the second light source 40B on the right preferably correspondingly emit red, green, and blue light, respectively, and the second light source 40B on the right is preferably rotated 45 degrees so that the chip 44 emitting red light is adjacent to the chip 43 emitting blue light, thereby enhancing the light mixing effect.
[0053] like Figure 13 As shown, when a single fin 240 corresponds to multiple sets of second light sources 40B and reflectors (i.e., curved surfaces 230), the channel 260 is preferably positioned between two adjacent curved surfaces 230 to separate the light emission range. By reflecting light through the vertical wall of the channel 260, light mixing can be avoided, thereby improving color performance.
[0054] In summary, compared to prior art, the light guide of the present invention has a curved surface that can reflect light laterally over a wider angle range to a greater distance. Furthermore, the light guide of the present invention can also provide multi-directional light emission through the fin-shaped light-emitting surface, thereby enhancing the light emission effect.
[0055] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be included in the scope of the present invention.
Claims
1. A light guide component, characterized in that, Include: The body has a first side and a second side that are opposite each other; A light-incident surface, which is disposed on the first side of the body; The light-emitting surface and the light-receiving surface are located at opposite ends of the body, respectively; and A curved surface, the curved surface being disposed on the second side of the body corresponding to the light-incident surface, The vertical projection of the incident light surface overlaps with the curved surface.
2. The light guide component according to claim 1, characterized in that, The curved surface extends in a fan shape toward the light-emitting surface, and the vertical projection of the curved surface does not overlap with the light-emitting surface.
3. The light guide component according to claim 1, characterized in that, The light guide also includes a reflective layer disposed on the curved surface.
4. The light guide component according to claim 1, characterized in that, The light guide also includes a channel, wherein the channel is disposed on the body and adjacent to the curved surface.
5. The light guide component according to claim 1, characterized in that, The body includes multiple fins arranged along the periphery of the body, and the light-emitting surface is disposed on the multiple fins.
6. The light guide element according to claim 5, characterized in that, The upper surface of each fin is raised upward relative to the incident light surface and parallel to the incident light surface.
7. The light guide element according to claim 5, characterized in that, Each fin has a beveled surface as the light-emitting surface, and the beveled surface slopes from the end of the corresponding fin toward the curved surface.
8. The light guide component according to claim 1, characterized in that, The first side of the body includes a plane, and a tangent plane parallel to the plane defines the portion of the curved surface closest to the plane. The light-incident surface is a part of the plane and is located between the portion of the curved surface and the light-out surface.
9. A backlight module, characterized in that, Include: The light guide element according to any one of claims 1 to 8; and A light source, which is positioned corresponding to the incident light surface and the curved surface; The light emitted by the light source enters the light guide from the light incident surface, and the curved surface is used to reflect the light entering the light guide toward the light exiting surface.
10. The backlight module according to claim 9, characterized in that, The first side of the body includes a plane, and a tangent plane parallel to the plane defines the portion of the surface closest to the plane. The center point of the light source is located between this portion of the surface and the light-emitting surface.
11. The backlight module according to claim 10, characterized in that, The light-emitting surface of the light source is adjacent to the portion of the curved surface closest to the plane.
12. The backlight module according to claim 9, characterized in that, The light-incident surface and the light-exit surface are located at the light-incident end and the light-exit end of the light guide, respectively, and the light-exit direction of the light source intersects the light transmission direction from the light-incident end to the light-exit end.
13. A backlight module, characterized in that, Include: The light guide according to any one of claims 1 to 8, wherein the light guide comprises a plurality of the curved surfaces, and the light guide further comprises a channel disposed between two adjacent curved surfaces of the plurality of curved surfaces; and Multiple light sources are provided, each corresponding to a different curved surface located on the incident light surface.
14. The backlight module according to claim 13, characterized in that, The multiple light sources provided by the multiple light sources, which are set for two adjacent surfaces in the multiple curved surfaces, provide complementary colors of light.