Thick-walled light guide and atmosphere lamp

Abstract

This invention provides a thick-walled light guide and ambient light. The thick-walled light guide includes a light-incident section, a reflective section, and a light-emitting section, with the reflective section located between the light-incident section and the light-emitting section. The light-incident section is elongated and columnar, with a focusing area located on one side of the light-incident section and extending along its length. The reflective section extends obliquely upward from the other side of the light-incident section away from the light-incident section to the light-emitting section, and has a reflective surface located on an oblique surface adjacent to the length direction of the light-incident section. The focusing area focuses the light emitted by the light source and projects it onto the reflective surface, which then reflects the light through at least two total internal reflections before emitting it from the light-emitting section. This invention can collect light at a 120° angle, with a luminous efficiency approximately four times that of the original, greatly improving light utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of optics, specifically to a thick-walled light guide and ambient light, and more particularly to an efficient light-guiding ambient light for automotive interiors. Background Technology

[0002] For ambient lighting in car sunroofs, there was a previous technical solution that allowed light to enter from the side of the sunroof glass. However, this method required the light source / light guide structure to be located on the side of the sunroof glass. On the one hand, this took up space in the sunroof and reduced its aesthetics. On the other hand, it placed higher demands on the sealing of the sunroof area, greatly increasing the technical difficulty and cost.

[0003] Currently, sunroof ambient lighting uses a light guide glass located below the sunroof to direct LED light into the sunroof glass. The light is reflected within the glass and then reflected by reflective ink on the sunroof glass, thus illuminating the sunroof. However, the luminous efficacy of the LEDs at the input end is currently low, and a significant amount of light still escapes from the other end of the light guide glass and fails to reach the sunroof. Furthermore, the light guide glass material is only suitable for flat surfaces and cannot be made into irregular shapes. Figure 1 The diagram shows the light-introducing form of the existing solution, which consists of LED 01, PCBA board 06, light guide glass 02, skylight glass 03, 3M adhesive 04, and light-shielding strip 05. The LED light enters the skylight glass through the light guide glass and is then continuously reflected and propagated within the skylight glass.

[0004] Figure 2 for Figure 1 The light propagation path diagram, such as Figure 2 As shown, LED 01 has a light emission angle of 120°, but only 30° of light can enter the sunroof glass 03 and propagate within the glass. At the light entry point, 3 / 4 of the light efficiency is lost, resulting in low overall light efficiency.

[0005] like Figure 3 and Figure 4 The diagram shows another existing solution. In this solution, a portion of the light from LED 001 enters the sunroof glass 004 through light guide 002. A small portion of the light entering light guide 002 then enters light guide glass 003, and finally enters the sunroof glass 004 from light guide glass 003. This solution also suffers from significant light loss; specifically, a large amount of light is lost at both light guide 002 and light guide glass 004, with most of the light failing to enter the sunroof glass, resulting in low overall luminous efficiency.

[0006] Therefore, it is necessary to provide a new technical solution. Summary of the Invention

[0007] To address the technical problems existing in the prior art, this utility model discloses a thick-walled light guide and ambient light, which can collect light at a 120° angle, with a luminous efficacy approximately four times that of the original, greatly improving light utilization efficiency. The specific technical solution is as follows:

[0008] On the one hand, this utility model provides a thick-walled light guide, which includes a light-incident part, a reflective part, and a light-emitting part, wherein the reflective part is located between the light-incident part and the light-emitting part;

[0009] The light-incident part is in the shape of a long column, and the light-incident part has a light-concentrating area, which is located on one side of the light-incident part and extends along the length direction of the light-incident part;

[0010] The reflective portion extends obliquely upward from the other side of the light-incident portion away from the light-incident portion to the light-exit portion. The reflective portion has a reflective surface located on an oblique surface adjacent to the length direction of the light-incident portion.

[0011] The focusing area focuses the light emitted by the light source and projects it onto the reflective surface, and the reflective surface reflects the light at least twice before it exits from the light-emitting part.

[0012] Furthermore, the light-incident portion is arranged in a horizontal direction, and the light-concentrating area is located at one end of the light-incident portion. The light-concentrating area focuses the incident light into parallel light that propagates in a horizontal direction.

[0013] The reflective part includes a first reflective surface and a second reflective surface opposite to the first reflective surface. The first reflective surface is opposite to the light-concentrating area. The first reflective surface receives the light projected by the light-concentrating area and reflects the light to the second reflective surface. The second reflective surface reflects the light completely to the light-emitting part for emission.

[0014] One side of the light-emitting part is formed as a light-emitting plane, which is parallel to the horizontal plane and connected to the second reflective surface. The other side of the light-emitting part is connected to the light-emitting plane and also connected to the first reflective surface. The other side of the light-emitting part is opposite to the light-emitting plane and is parallel to the direction of light propagation within the light-emitting part.

[0015] Furthermore, the thickness of the reflective portion gradually increases from the light-incident portion to the light-exit portion;

[0016] Along the length of the light-incident portion, the light-exit portion is triangular prism-shaped.

[0017] Furthermore, the angle between the first reflecting surface and the horizontal plane is β, and the angle between the second reflecting surface and the vertical plane is α. The angles α and β satisfy the following conditions:

[0018] n*sin(Π / 2-β)>1 (1)

[0019] n*sin(Π-α-2β)>1 (2)

[0020] In equations (1) and (2), n is the refractive index of the thick-walled optical guide.

[0021] Furthermore, the focusing area has a focusing lens, which is disposed opposite to the first reflecting surface;

[0022] The condensing lens has an entrance light slot that extends along the length of the entrance light portion, and all the light emitted from the light source is incident into the corresponding entrance light slot; the light emitted from the light source is focused into parallel light by the focusing lens and then incident onto the first reflecting surface.

[0023] Furthermore, the focusing area has a concave surface and a reflective arc surface. The concave surface is formed by indentation from the surface of the light-incident part to form an arc surface. The reflective arc surface is opposite to the first reflective surface, and the concave surface is opposite to the reflective arc surface. The length of the reflective arc surface is the same as the length of the concave surface.

[0024] All the light emitted by the light source is incident on the concave surface and projected onto the reflective arc surface, which then reflects the light to the first reflective surface.

[0025] On the other hand, this utility model also provides an ambient light, which includes a light shield, a substrate, a light source and the aforementioned thick-walled light guide;

[0026] The light-shielding member has a receiving cavity, and the thick-walled light guide and the light source are both located in the receiving cavity. The substrate is covered at the opening of the receiving cavity, and the light-emitting part of the thick-walled light guide abuts against and is fixed on the substrate. The light emitted by the thick-walled light guide enters the substrate and is reflected and propagated within the substrate.

[0027] The light source is directed toward the focusing area of ​​the thick-walled light guide.

[0028] Furthermore, it also includes a PCBA board, on which the light source is mounted;

[0029] The PCBA board is located in the receiving cavity and connected to the light-shielding member, or

[0030] The PCBA board is located in the receiving cavity and is detachably connected to the thick-walled optical guide.

[0031] Furthermore, the PCBA board is connected to the thick-walled light guide by clips, screws and / or rivets, and the PCBA board extends along the length direction of the light incident portion;

[0032] The light source consists of several LEDs, which extend along the length of the light-incident portion of the thick-walled light guide.

[0033] The light-shielding component is a light-shielding strip, and the substrate is glass.

[0034] Furthermore, the substrate is automotive sunroof glass, and the thick-walled light guide is located on the inner surface of the automotive sunroof glass.

[0035] This utility model has the following beneficial effects:

[0036] (1) The thick-walled light guide and ambient light of this utility model replaces the original light guide glass with a light guide, which increases the light collection angle from 30° to 120°, and the light efficiency is about 4 times that of the original, which greatly improves the light utilization efficiency.

[0037] (2) The thick-walled light guide and ambient light of this utility model have two reflective surfaces that, on the one hand, change the direction of light propagation, and on the other hand, facilitate the mixing of RGB LEDs. The colors mixed by the light reflected twice are more consistent, avoiding the dispersion problem caused by insufficient light mixing.

[0038] (3) The thick-walled light guide and ambient light of this utility model can adjust the angle between the two reflective surfaces and the horizontal and vertical directions of the light guide according to the different light guide materials, so as to ensure that the two reflections of light in the light guide are both in the form of total internal reflection, thereby maximizing efficiency.

[0039] (4) The thick-walled light guide and ambient light of this utility model can detachably connect the PCBA to the light guide, avoiding the adhesion of the PCBA to the glass, which is conducive to the disassembly of the PCBA.

[0040] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of a skylight ambient light source scheme in the prior art.

[0043] Figure 2 for Figure 1 A schematic diagram of light propagation;

[0044] Figure 3This is a schematic diagram of another sunroof ambient lighting scheme in the prior art.

[0045] Figure 4 for Figure 3 A schematic diagram of light propagation;

[0046] Figure 5 This is a schematic diagram of one embodiment of the ambient light of this utility model;

[0047] Figure 6 for Figure 5 A first-view structural schematic diagram of a thick-walled optical guide;

[0048] Figure 7 for Figure 5 A schematic diagram of the structure of a thick-walled optical guide from a second perspective;

[0049] Figure 8 for Figure 5 A schematic diagram of light propagation in ambient lighting;

[0050] Figure 9 This is a schematic diagram of another embodiment of the ambient light of this utility model;

[0051] Figure 10 for Figure 9 A schematic diagram of light propagation.

[0052] Among them, 1-light guide, 2-light shield, 21-accommodating cavity, 3-light source, 4-PCBA board, 5-substrate, 11-light entrance section, 12-reflecting section, 13-light exit section, 131-light exiting plane, 132-the other side of the light exiting section, 14-connecting surface, 110-light focusing area, 111-light entrance groove, 113-concave surface, 114-reflecting arc surface, 121-first reflecting surface, 122-second reflecting surface. Detailed Implementation

[0053] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0054] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0056] Please see Figures 5 to 10 , Figure 5 This is a schematic diagram of one embodiment of the ambient light of this utility model; Figure 6 for Figure 5 A first-view structural schematic diagram of a thick-walled optical guide; Figure 7 for Figure 5 A schematic diagram of the structure of a thick-walled optical guide from a second perspective; Figure 8 for Figure 5 A schematic diagram of light propagation in ambient lighting; Figure 9 This is a schematic diagram of another embodiment of the ambient light of this utility model; Figure 10 for Figure 9 A schematic diagram of light propagation.

[0057] like Figures 5 to 8 As shown, this utility model provides a thick-walled light guide 1, which includes a light-incident section 11, a reflective section 12 and a light-emitting section 13, wherein the reflective section 12 is located between the light-incident section 11 and the light-emitting section 13.

[0058] The light-incident part 11 is in the shape of a long column, and the light-incident part 11 has a light-concentrating area 110. The light-concentrating area 110 is located on one side of the light-incident part 11 and extends along the length direction of the light-incident part 11.

[0059] exist Figures 5 to 8In the illustrated embodiment, the focusing area 110 has a focusing lens, which is disposed opposite to the first reflecting surface 121. The focusing lens has an entrance slot 111, which extends along the length of the entrance portion 11. All the light emitted from the light source 3 is incident into the corresponding entrance slot 111. The light emitted from the light source is focused into parallel light by the focusing lens and then incident onto the first reflecting surface 121.

[0060] The reflective portion 12 extends obliquely upward from the other side of the light-incident portion 11 away from the light-incident portion to the light-emitting portion 13. The reflective portion 12 has a reflective surface located on an oblique surface adjacent to the light-incident portion 11 along its length. The reflective surface includes a first reflective surface 121 and a second reflective surface 122 disposed opposite to the first reflective surface 121. The first reflective surface 121 is adjacent to a surface of the light-incident portion 11 disposed along its length, and the second reflective surface 122 is adjacent to another surface of the light-incident portion 11 disposed along its length. The first reflective surface 121 is opposite to the light-concentrating area 110.

[0061] Please continue reading. Figure 6 The light-incident section 11 is arranged in a horizontal direction, and the light-concentrating area 110 is located at one end of the light-incident section 11. The light-incident section 11 converts the incident light into parallel light that propagates in a horizontal direction.

[0062] The angle between the first reflective surface 121 and the horizontal plane is β, and the angle between the second reflective surface 122 and the vertical plane is α. The first reflective surface 121 receives the horizontal light rays projected by the focusing area 110 and reflects them completely to the second reflective surface 122. The second reflective surface 122 reflects the light rays completely to the light-emitting part 13 for emission. The first and second reflective surfaces satisfy the following conditions:

[0063] n*sin(Π / 2-β)>1 (1) n*sin(Π-α-2β)>1 (2) Wherein, in equations (1) and (2), n is the refractive index of the thick-walled optical guide. In one example, the width of the first reflecting surface 121 is smaller than the width of the second reflecting surface 122 to ensure that the second reflecting surface can reflect more light to the light emitting part, thereby improving the light incident efficiency. Further, the thickness of the reflecting part 12 gradually increases along the direction from the light incident part 11 to the light emitting part 13.

[0064] like Figure 6 and Figure 7As shown, the light-emitting part 13 is located on the other side of the reflective part. One side of the light-emitting part 13 is formed as a light-emitting plane 131, which is parallel to the horizontal plane. The light-emitting plane 131 is connected to the second reflective surface 122. The other side 132 of the light-emitting part is connected to the light-emitting plane 131 and is opposite to the light-emitting plane (131). The other side 132 of the light-emitting part is connected to the first reflective surface 121.

[0065] Along the length of the light-incident section 11, the light-emitting section 13 is triangular in shape, meaning that the cross-section of the light-emitting section 13 perpendicular to its length extension direction is triangular. Here, "triangular" refers to an outer contour that is approximately triangular or similar to a triangle. For example, when the side of the light-emitting section is connected to the reflective surface of the reflective section via a small connecting surface, its cross-section is not strictly triangular, but its outer contour can be approximated as triangular. Figures 5 to 8 In this embodiment, the light-emitting plane 131 is directly adjacent to and connected to the second reflective surface 122; the other side 132 of the light-emitting part is connected to the light-emitting plane 131, and the other side 132 of the light-emitting part is connected to the first reflective surface 121 through a small connecting surface 14. The shape of the connecting surface 14 is not limited, and the other side 132 of the light-emitting part is parallel to the direction of light propagation within the light-emitting part 13. It should be noted that parallelism here should be understood as basically parallel. Due to processing and other reasons, there may be a small angular difference between the two, but they are generally parallel, for example, within 10°. As a result, the light-emitting part 13 can have a larger light-emitting area, which on the one hand ensures that more light enters the substrate 5 (such as a car sunroof glass) adjacent to the light-emitting part 13, and on the other hand, the large contact area can make the light guide and the substrate (such as the sunroof glass) more firmly connected. At the same time, this shape also reduces the weight / volume of the light guide without affecting the light efficiency.

[0066] In other embodiments, the light-emitting plane 131 and the second reflective surface 122 are connected by a connecting surface or other connection methods. The shape of the connecting surface is not limited, and other connection methods are not limited. The other side 132 of the light-emitting part can also be directly adjacent to the first reflective surface 121, or indirectly connected by other connection methods. Other connection methods are not limited.

[0067] It should be noted that because the refractive indices of the light guide and the glass are relatively close, and the light guide and the glass (such as the sunroof glass) are in close contact, total internal reflection will not occur at the contact surface between the light guide and the glass.

[0068] like Figure 7 and 8As shown, a portion of the light emitted from the light source 3 is focused into parallel light by the focusing area 110 and incident on the first reflecting surface 121. The light illuminating the first reflecting surface 121 is reflected by the first reflecting surface 121 to the second reflecting surface 122, and then reflected again by the second reflecting surface 122 to exit the light-emitting plane 131 of the light-emitting part 13. In this invention, the light emitted from the light source undergoes two total internal reflections after being focused by the focusing area and then reflected twice by the first and second reflecting surfaces. This serves two purposes: firstly, it changes the direction of light propagation, allowing the light to exit from the light-emitting part, achieving efficient light input; secondly, it facilitates the mixing of RGB LEDs, resulting in more consistent colors from the two reflected reflections, avoiding dispersion problems caused by insufficient light mixing. In this invention, the light guide glass is eliminated, and the existing light guide design is changed, reducing light waste and greatly improving luminous efficiency from the stages of light input, light propagation within the light guide, and light output.

[0069] The angle β between the first reflecting surface 121 and the horizontal direction and the angle α between the first reflecting surface 121 and the vertical direction can be adjusted according to the design. The light guide can be made of PC transparent material, PMMA transparent material or other transparent material. Depending on the light guide material, its refractive index is different, and the angle restriction of the first reflecting surface and the second reflecting surface is different. If the refractive index of the light guide is n, then n*sin(Π / 2-β)>1 and n*sin(Π-α-2β)>1 must be satisfied to ensure that the two reflections of light in the light guide are both in the form of total internal reflection, so as to maximize the efficiency.

[0070] Please see Figure 9 and Figure 10 In this embodiment, both the reflective part 12 and the light-emitting part 13 are connected to... Figures 5 to 8 The two are the same, except for the light-incident section 11. Specifically, the light-incident section 11 is arranged horizontally. The focusing area 110 has a concave surface 113 and a reflective arc surface 114. The concave surface 113 is an arc surface formed by recessing from the horizontal surface above the light-incident section 11. The reflective arc surface 114 is located on the side of the light-incident section 11, and it is opposite to the first reflective surface 121. The concave surface 113 is opposite to the reflective arc surface 114. All the light emitted by the light source is incident on the concave surface 113 and projected onto the reflective arc surface 114. The reflective arc surface 114 reflects the light horizontally to the first reflective surface 121, and then to the second reflective surface 122. The light is then reflected again by the second reflective surface 122 and emitted from the light-emitting section 13. In this embodiment, by changing the matching position of the light source and the thick-walled light guide to a reflection form, the overall uniformity of the reflection form is better, but the efficiency is slightly reduced.

[0071] Please see Figures 5 to 8This utility model also provides an ambient light, which includes a light-shielding component 2, a substrate 5, a light source 3, a PCBA board 4, and the aforementioned thick-walled light guide 1. The light-shielding component 2 is a light-shielding strip, and the substrate 5 is glass. Preferably, the substrate 5 is automotive sunroof glass, and the thick-walled light guide 1 is located on the inner surface of the automotive sunroof glass.

[0072] The light-shielding member 2 forms a receiving cavity 21, and the thick-walled light guide 1 and the light source 3 are both located in the receiving cavity 21. The substrate 5 is covered at the opening of the receiving cavity 21, and the light-emitting part 13 of the thick-walled light guide 1 abuts against and is fixed on the substrate 5. The light emitted from the light-emitting part 13 enters the substrate 5 and is reflected and propagated within the substrate 5.

[0073] like Figures 5 to 8 As shown, in this embodiment, the PCBA board 4 is located in the receiving cavity 21 and connected to the inner wall of the light-shielding member 2. Preferably, the PCBA board 4 is connected to the side wall of the light-shielding member 2 near the light-incident portion of the thick-walled light guide. The PCBA board 4 extends along the length direction of the light-incident portion 11. The light source 3 faces the focusing area 110 of the thick-walled light guide 1. The light source 3 consists of several LEDs, which extend along the length direction of the light-incident portion 11 and are mounted on the PCBA board. The focusing area 110 is used to focus the LED light to form parallel light. After two total internal reflections by the first reflecting surface 121 and the second reflecting surface 122 of the thick-walled light guide, the parallel light is emitted from the light-emitting plane and reaches the skylight glass, where it is reflected inside the skylight glass, thereby achieving efficient light entry.

[0074] like Figure 9 and Figure 10 As shown, in this embodiment, the PCBA board 4 is located in the receiving cavity 21 and connected to the thick-walled light guide 1 via a connector. Further, the PCBA board 4 is detachably connected to the light-incident portion 11 of the thick-walled light guide via clips, screws, and / or rivets. Light emitted from the LED is projected onto the reflective arc surface 114 via the concave surface 113. The reflective arc surface 114 reflects the light to the first reflective surface 121, and then to the second reflective surface 122. The light is then reflected again by the second reflective surface 122 to the light-emitting portion 13, exiting and reaching the sunroof glass, where it is reflected inside the sunroof glass. In this embodiment, the LED and light guide connection position can also be changed to a reflective form, which would result in better overall uniformity of the reflection, but the efficiency would be slightly reduced.

[0075] (1) The thick-walled light guide and ambient light of this utility model replaces the original light guide glass with a light guide, which increases the light collection angle from 30° to 120°, and the light efficiency is about 4 times that of the original, which greatly improves the light utilization efficiency.

[0076] (2) The thick-walled light guide and ambient light of this utility model have two reflective surfaces that, on the one hand, change the direction of light propagation, and on the other hand, facilitate the mixing of RGB LEDs. The colors mixed by the light reflected twice are more consistent, avoiding the dispersion problem caused by insufficient light mixing.

[0077] (3) The thick-walled light guide and ambient light of this utility model can adjust the angle between the two reflective surfaces and the horizontal and vertical directions of the light guide according to the different light guide materials, so as to ensure that the two reflections of light in the light guide are both in the form of total internal reflection, thereby maximizing efficiency.

[0078] (4) The thick-walled light guide and ambient light of this utility model can detachably connect the PCBA to the light guide, avoiding the adhesion of the PCBA to the glass, which is conducive to the disassembly of the PCBA.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A thick-walled optical guide, characterized in that, It includes an incident light section (11), a reflective section (12), and an exiting light section (13), wherein the reflective section (12) is located between the incident light section (11) and the exiting light section (13); The light-incident part (11) is in the shape of a long column, and the light-incident part (11) has a light-concentrating area (110), which is located on one side of the light-incident part and extends along the length direction of the light-incident part; The reflective part (12) extends obliquely upward from the other side of the light-incident part (11) away from the light-incident part to the light-outceasing part (13). The reflective part (12) has a reflective surface located on an oblique surface adjacent to the length direction of the light-incident part. The focusing area (110) focuses the light emitted by the light source and projects it onto the reflective surface, and the reflective surface reflects the light at least twice before it is emitted from the light-emitting part (13).

2. The thick-walled optical guide according to claim 1, characterized in that, The light-incident section (11) is arranged in a horizontal direction, and the light-concentrating area (110) is located at one end of the light-incident section. The light-concentrating area (110) converges the incident light into parallel light that propagates in a horizontal direction. The reflective part (12) includes a first reflective surface (121) and a second reflective surface (122) opposite to the first reflective surface (121). The first reflective surface (121) is opposite to the light-concentrating area (110). The first reflective surface (121) receives the light projected by the light-concentrating area (110) and reflects the light to the second reflective surface (122). The second reflective surface (122) reflects the light completely to the light-emitting part (13) for emission. One side of the light-emitting part (13) is formed as a light-emitting plane (131), which is parallel to the horizontal plane and connected to the second reflective surface (122). The other side (132) of the light-emitting part is connected to the light-emitting plane (131) and connected to the first reflective surface (121). The other side (132) of the light-emitting part is opposite to the light-emitting plane (131) and is parallel to the direction of light propagation in the light-emitting part (13).

3. The thick-walled optical guide according to claim 2, characterized in that, The thickness of the reflective part (12) gradually increases from the light-incident part (11) to the light-exiting part (13); Along the length of the light-incident portion (11), the light-exit portion (13) is triangular prism-shaped.

4. The thick-walled optical guide according to claim 2, characterized in that, The angle between the first reflecting surface (121) and the horizontal plane is β, and the angle between the second reflecting surface (122) and the vertical plane is α. The angles α and β satisfy the following conditions: n*sin(Π / 2-β)>1 (1) n*sin(Π-α-2β)>1 (2) In equations (1) and (2), n is the refractive index of the thick-walled optical guide.

5. The thick-walled optical guide according to claim 2, characterized in that, The focusing area (110) has a focusing lens, which is disposed opposite to the first reflecting surface (121); The condensing lens has an entrance slot (111) that extends along the length of the entrance portion (11). All the light emitted from the light source is incident into the corresponding entrance slot (111). The light emitted from the light source is focused into parallel light by the focusing lens and then incident onto the first reflecting surface (121).

6. The thick-walled optical guide according to claim 2, characterized in that, The focusing area (110) has a concave surface (113) and a reflective arc surface (114); The concave surface (113) is formed by indenting the light incident part inward to form an arc surface. The reflective arc surface (114) is opposite to the first reflective surface (121), the concave surface (113) is opposite to the reflective arc surface (114), and the length of the reflective arc surface (114) is the same as the length of the concave surface (113). All the light emitted by the light source is incident on the concave surface and projected onto the reflective arc surface, which then reflects the light to the first reflective surface.

7. An ambient light, characterized in that, It includes a light-shielding element (2), a substrate (5), a light source (3), and a thick-walled light guide (1) as described in any one of claims 1-6; The light-shielding member (2) forms a receiving cavity (21), and the thick-walled light guide (1) and the light source (3) are both located in the receiving cavity (21). The substrate (5) covers the opening of the receiving cavity (21), and the light-emitting part of the thick-walled light guide (1) abuts against and is fixed on the substrate (5). The light emitted by the thick-walled light guide enters the substrate and is reflected and propagated within the substrate. The light source (3) is directed toward the focusing area (110) of the thick-walled light guide (1).

8. The ambient light according to claim 7, characterized in that, It also includes a PCBA board (4), on which the light source (3) is mounted; The PCBA board (4) is located in the receiving cavity (21) and connected to the light-shielding member (2), or The PCBA board (4) is located in the receiving cavity (21) and is detachably connected to the thick-walled optical guide (1).

9. The ambient light according to claim 8, characterized in that, The PCBA board (4) is connected to the thick-walled light guide (1) by clips, screws and / or rivets, and the PCBA board (4) extends along the length direction of the light-incident part (11); The light source (3) consists of several LEDs, which extend along the length of the light-incident portion (11) of the thick-walled light guide (1). The light-shielding component (2) is a light-shielding strip, and the substrate (5) is glass.

10. The ambient light according to claim 9, characterized in that, The substrate (5) is a car sunroof glass, and the thick-walled light guide (1) is located on the inner surface of the car sunroof glass.

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