A double-layer optical light-transmitting plate illumination structure

Abstract

This utility model relates to the field of LED lighting, and in particular to a double-layer optical light-transmitting plate lighting structure. A double-layer optical light-transmitting plate lighting structure includes: a lower light-transmitting plate for transmitting light outwards, a lower LED light strip as a light source, and two upper supplementary lighting components; the upper supplementary lighting components include: an upper light-transmitting plate for supplementing light to the lower light-transmitting plate and an upper LED light strip as a light source; light emitted from the upper LED light strip is transmitted outwards through the upper light-transmitting plate and illuminates the lower light-transmitting plate; light emitted from the lower LED light strip and light transmitted from the upper light-transmitting plate are transmitted outwards through the lower light-transmitting plate together; both the lower and upper LED light strips are equipped with multiple LEDs. The beneficial effects of this utility model are: better lighting effect; better brightness uniformity within a reasonable usage area; and, in particular, it can solve the problem of edge brightness reduction.

Description

Technical Field

[0001] This utility model relates to the field of LED lights, and in particular to a double-layer optical light-transmitting plate lighting structure. Background Technology

[0002] The core of a lighting fixture is its light-emitting element and light-guiding or light-transmitting element. Proper arrangement of these elements can result in a better lighting effect.

[0003] A desk lamp is a lighting fixture used on a desk to provide sufficient light for users when reading data or processing documents, preventing eye strain or fatigue caused by insufficient light. The lighting effect of a desk lamp is of particular importance. It is necessary to optimize the core of the lamp to improve the problem of uneven lighting brightness. Utility Model Content

[0004] The purpose of this invention is to provide a double-layer optical light-transmitting plate illumination structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A double-layer optical light-transmitting plate lighting structure includes: a lower light-transmitting plate for transmitting light outwards, a lower LED light strip as a light source, and two upper supplementary lighting components; the upper supplementary lighting components include: an upper light-transmitting plate for supplementing light to the lower light-transmitting plate and an upper LED light strip as a light source; light emitted from the upper LED light strip is transmitted outwards through the upper light-transmitting plate and illuminates the lower light-transmitting plate; light emitted from the lower LED light strip and light transmitted from the upper light-transmitting plate are transmitted outwards through the lower light-transmitting plate together; both the lower and upper LED light strips are equipped with multiple LEDs; the length is defined based on the lower light-transmitting plate. The dimensions of the lower light-transmitting plate in the length direction are greater than those in the thickness direction; the lower light-transmitting plate transmits light outward along the thickness direction; two upper supplementary lighting components are located on the side of the lower light-transmitting plate away from the outward transmission of light in the thickness direction, and the two upper supplementary lighting components are respectively located at both ends of the lower light-transmitting plate in the length direction; multiple LEDs of the lower LED light strip are arranged along the length direction of the lower light-transmitting plate and the LEDs on the lower LED light strip face the side of the lower light-transmitting plate; multiple LEDs of the upper LED light strip are arranged along the side of the upper light-transmitting plate and face the upper light-transmitting plate.

[0007] As a further embodiment of this utility model, the end faces of the two upper light-transmitting plates that are close to each other are set as arc surfaces; the arc surfaces make the upper light-transmitting plates form long side surfaces and short side surfaces on both sides in the width direction; the length of the long side surface is greater than the length of the short side surface; one end of the arc surface is smoothly connected to the short side surface, and the other end of the arc surface is connected to the long side surface.

[0008] As a further embodiment of this utility model, multiple LEDs of the upper LED light strip are arranged along the short side and the curved surface.

[0009] As a further embodiment of this utility model, the short side and the lower LED light strip are located on the same side of the upper light-transmitting plate in the width direction.

[0010] As a further embodiment of this utility model, the short side surface of the upper light-transmitting plate is formed with a plurality of lateral refraction teeth that guide light to refract away from the curved surface; each lateral refraction tooth corresponds to one LED light of the LED light strip; the lateral refraction teeth form a front side and a back side; the LED light corresponding to the lateral refraction tooth is aligned with the front side of the lateral refraction tooth; the front side of the lateral refraction tooth guides light to refract to the left; the brightness of the light passing through the front side of the lateral refraction tooth is greater than the brightness of the light passing through the back side of the lateral refraction tooth.

[0011] As a further embodiment of this utility model, the density of multiple LEDs in the upper LED light strip corresponding to the curved surface is greater than the density of multiple LEDs in the upper LED light strip corresponding to the short side surface.

[0012] As a further embodiment of this utility model, a left refraction area and a right refraction area are formed on the side of the lower light-transmitting plate facing the lower LED light strip; in the length direction, the left refraction area is located at the left end, and the right refraction area is located at the right end; the left refraction area is provided with multiple left refraction teeth; each left refraction tooth corresponds to one LED light of the lower LED light strip; the left refraction teeth form a left tooth refraction front and a left tooth refraction back; the center of the LED light corresponding to the left refraction area is aligned with the left refraction tooth front; the left refraction tooth front guides the light to refract to the left; the brightness of the light after passing through the left tooth refraction front is greater than the brightness of the light after passing through the left tooth refraction back; the right refraction area is provided with multiple right refraction teeth; each right refraction tooth corresponds to one LED light of the lower LED light strip; the right refraction teeth form a right tooth refraction front and a right tooth refraction back; the center of the LED light corresponding to the right refraction area is aligned with the right refraction tooth front; the right refraction tooth front guides the light to refract to the right; the brightness of the light after passing through the right tooth refraction front is greater than the brightness of the light after passing through the right tooth refraction back.

[0013] As a further embodiment of this utility model, the slope of the front side of the left refractive tooth is gentler than that of the back side of the left refractive tooth; the slope of the front side of the right refractive tooth is gentler than that of the back side of the right refractive tooth.

[0014] As a further embodiment of this utility model, a middle refraction zone is also formed on the side of the lower light-transmitting plate facing the lower LED light strip; the middle refraction zone is located between the left refraction zone and the right refraction zone; the middle refraction zone is provided with multiple middle refraction teeth; the tooth shape of the middle refraction teeth is symmetrical from left to right; the tooth gap of two adjacent middle refraction teeth is aligned with one LED of the lower LED light strip.

[0015] As a further embodiment of this utility model, the upper supplementary lighting component also includes: a partition; a lower light-transmitting plate is arranged parallel to the lower light-transmitting plate; the partition is arranged between the lower light-transmitting plate and the upper light-transmitting plate, so that a spatial gap is formed between the lower light-transmitting plate and the upper light-transmitting plate.

[0016] Compared with existing technologies, the advantages of this invention are: better lighting effect; better brightness uniformity within a reasonable usage area; and, in particular, the solution to the problem of brightness reduction at the edges. For a desk lamp, better uniformity provides users with better eye protection and a better user experience.

[0017] Due to the arrangement of the LED structure and the existence of the LED divergence angle, the light converged in the lower light-transmitting panel has higher brightness in the center and lower brightness on both sides compared to the center, resulting in poor brightness uniformity. The upper supplementary lighting component improves the brightness uniformity of the luminaire within the illuminated area.

[0018] The smaller the uniformity value of the lighting area, the more effectively it protects human eye health and delays fatigue.

[0019] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a perspective view of the double-layer optical light-transmitting plate lighting structure installed inside the lamp housing, according to an embodiment of this utility model.

[0021] Figure 2 yes Figure 1 Plan view of the structure;

[0022] Figure 3 This is a perspective view of the double-layer optical light-transmitting plate illumination structure according to an embodiment of the present invention;

[0023] Figure 4 Figure 3 A schematic diagram of the structure after the mounting bracket has been removed;

[0024] Figure 5 yes Figure 4 Exploded view of the middle structure;

[0025] Figure 6 yes Figure 5 A schematic diagram of the lower light-transmitting panel, side LED light strip, and lower LED light strip;

[0026] Figure 7 yes Figure 5 A schematic diagram of the upper light-transmitting panel and the upper LED light strip;

[0027] Figure 8 yes Figure 6 A magnified view of point A in the image;

[0028] Figure 9 yes Figure 6 A magnified view of point B in the image;

[0029] Figure 10 yes Figure 6 A magnified view of point C in the image;

[0030] Figure 11 yes Figure 7 A magnified view of a portion of point D in the image;

[0031] Figure 12 This is a schematic diagram of the left and middle refractive teeth of this utility model refracting light.

[0032] List of reference numerals in the attached drawings: Double-layer optical light-transmitting plate lighting structure 100, mounting bracket 10, lamp housing 11, main lighting component 20, lower light-transmitting plate 21, left refraction tooth 212, left tooth refraction front 2121, left tooth refraction back 2122, right refraction tooth 213, right tooth refraction front 2131, right tooth refraction back 2132, middle refraction tooth 214, lower LED light strip 22, front light-shielding strip 23, back light-shielding plate 24, upper supplementary light component 30, upper light-transmitting plate 31, curved surface 311, long side surface 312, short side surface 313, side refraction tooth 314, side refraction tooth front 315, side refraction tooth back 316, upper LED light strip 32, partition 33, upper light-shielding back plate 34, upper light-shielding strip 35, side supplementary light component 40, side LED light strip 41. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] The double-layer optical light-transmitting plate lighting structure 100 is the core component used for lighting, for example in... Figure 1 and Figure 2 In the lamp housing 11, the double-layer optical light-transmitting plate lighting structure 100 is installed inside the lamp housing 11 and used as a lamp head.

[0035] like Figures 1 to 12As shown, the double-layer optical light-transmitting plate lighting structure 100 includes a main lighting assembly 20 and two upper supplementary lighting assemblies 30. The main lighting assembly 20 includes a lower light-transmitting plate 21 for transmitting light outwards and a lower LED light strip 22 as a light source. The upper supplementary lighting assemblies 30 include an upper light-transmitting plate 31 for supplementing light to the lower light-transmitting plate 21 and an upper LED light strip 32 as a light source. Light emitted from the upper LED light strip 32 is transmitted outwards through the upper light-transmitting plate 31 and illuminates the lower light-transmitting plate 21. Light emitted from the lower LED light strip 22 and light transmitted from the upper light-transmitting plate 31 are transmitted outwards through the lower light-transmitting plate 21 together.

[0036] In a preferred embodiment, the double-layer optical light-transmitting plate lighting structure 100 further includes a mounting frame 10 and two side supplementary lighting components 40. Each side supplementary lighting component 40 includes a side LED light strip 41. The side supplementary lighting components 40 provide supplementary lighting to the lower light-transmitting plate 21 from both sides. The lower LED light strip 22, upper LED light strip 32, and side LED light strip 41 are all equipped with multiple LEDs. The lower light-transmitting plate 21, lower LED light strip 22, upper light-transmitting plate 31, upper LED light strip 32, and side LED light strip 41 are all mounted to the mounting frame 10.

[0037] The lower light-transmitting plate 21 is defined with length, width, and thickness directions. These directions are perpendicular to each other. The dimension of the lower light-transmitting plate 21 in the length direction is larger than its dimension in the thickness direction. The lower light-transmitting plate 21 transmits light outwards along its thickness direction. Two upper supplementary lighting components 30 are located on the side of the lower light-transmitting plate 21 away from the outwardly transmitted light in the thickness direction, and are respectively located at both ends of the lower light-transmitting plate 21 in the length direction.

[0038] Multiple LEDs of the lower LED light strip 22 are arranged along the length of the lower light-transmitting plate 21 and the LEDs of the lower LED light strip 22 face the side of the lower light-transmitting plate 21.

[0039] Multiple LEDs of the side LED light strip 41 are arranged along the width direction of the lower light-transmitting plate 21. The two side LED light strips 41 are located on both sides of the lower light-transmitting plate 21 in the length direction, and the LEDs of the side LED light strip 41 face the end face of the lower light-transmitting plate 21.

[0040] Multiple LEDs of the upper LED light strip 32 are arranged along the side of the upper light-transmitting plate 31 and face the upper light-transmitting plate 31.

[0041] Due to the divergence angle of the LED lights, the light emitted by the LED lights converges within the elongated lower light-transmitting plate 21, resulting in higher brightness at both ends of the lower light-transmitting plate 21, while the brightness in the middle is relatively higher. By setting the upper supplementary lighting component 30, the upper light-transmitting plate 31 can achieve more uniform supplementary lighting to both ends of the lower light-transmitting plate 21, reducing the problem of higher brightness in the middle and lower brightness at both ends when the lower light-transmitting plate 21 emits light alone. The side supplementary lighting component 40 also achieves the effect of supplementing light to both ends of the lower light-transmitting plate 21.

[0042] In a preferred embodiment, the end faces of the two upper light-transmitting plates 31 that are close to each other are configured as arc surfaces 311. The arc surfaces 311 form long side surfaces 312 and short side surfaces 313 on both sides of the upper light-transmitting plate 31 in the width direction. The length of the long side surface 312 is greater than the length of the short side surface 313. One end of the arc surface 311 smoothly connects to the short side surface 313, and the other end of the arc surface 311 connects to the long side surface 312. Multiple LEDs of the upper LED light strip 32 are arranged along the short side surface 313 and the arc surface 311. This helps improve the light-emitting effect of the upper light-transmitting plate 31, adapts to the lower light-transmitting plate 21, and solves the problem of low brightness at both ends of the lower light-transmitting plate 21. The density of multiple LEDs in the upper LED light strip 32 corresponding to the curved surface 311 is greater than the density of multiple LEDs in the upper LED light strip 32 corresponding to the short side surface 313, so that the ends of the upper light-transmitting plate 31 have higher ends, further improving the light-emitting effect of the upper light-transmitting plate 31, and adapting to the lower light-transmitting plate 21 to solve the problem of low brightness at both ends of the lower light-transmitting plate 21.

[0043] The ratio of the length to the width of the lower light-transmitting plate 21 is greater than or equal to 8:1 and less than or equal to 12:1.

[0044] In a preferred embodiment, the short side surface 313 and the lower LED light strip 22 are located on the same side of the upper light-transmitting plate 31 in the width direction. The short side surface 313 of the light-transmitting plate 31 is formed with a plurality of lateral refraction teeth 314 to guide light rays to refract away from the curved surface 311.

[0045] Each lateral refraction tooth 314 corresponds to one LED in the LED light strip 32. The lateral refraction tooth 314 forms a front side 315 and a back side 316. The LED corresponding to the lateral refraction tooth 314 is aligned with the front side 315. The front side 315 guides the light to refract to the left. The brightness of the light passing through the front side 315 is greater than the brightness passing through the back side 316. The arrangement of the front side 315 allows more light to refract towards the ends, enhancing the brightness of both ends.

[0046] In a preferred embodiment, the lower light-transmitting plate 21 has a left refraction area and a right refraction area on the side facing the lower LED light strip 22. In the length direction, the left refraction area is located at the left end, and the right refraction area is located at the right end. The left refraction area guides more light to be refracted towards the left end, and the right refraction area guides more light to be refracted towards the right end.

[0047] The left refraction area has multiple left refraction teeth 212. Each left refraction tooth 212 corresponds to one LED in the lower LED light strip 22. The left refraction teeth 212 form a left refraction front face 2121 and a left refraction back face 2122. The center of the LED corresponding to the left refraction area is aligned with the front face of the left refraction tooth 212. The front face of the left refraction tooth 212 guides the light to refract to the left. The brightness of the light after passing through the left refraction front face 2121 is greater than the brightness of the light after passing through the left refraction back face 2122. The left refraction front face 2121 guides more light to refract to the left.

[0048] The right-reflecting area has multiple right-reflecting teeth 213. Each right-reflecting tooth 213 corresponds to one LED in the lower LED light strip 22. The right-reflecting teeth 213 form a right-reflecting front side 2131 and a right-reflecting back side 2132. The center of the LED corresponding to the right-reflecting area is aligned with the front side of the right-reflecting tooth 213. The front side of the right-reflecting tooth 213 guides the light to refract to the right. The brightness of the light after passing through the right-reflecting front side 2131 is greater than the brightness of the light after passing through the right-reflecting back side 2132. The right-reflecting front side 2131 guides more light to refract to the right.

[0049] Specifically, the slope of the front side of the left refractive tooth 212 is gentler than that of the back side. The slope of the front side of the right refractive tooth 213 is gentler than that of the back side.

[0050] In a preferred embodiment, a middle refraction zone is also formed on the side of the lower light-transmitting plate 21 facing the lower LED light strip 22. The middle refraction zone is located between the left and right refraction zones. The middle refraction zone is provided with a plurality of middle refraction teeth 214. The tooth shape of the middle refraction teeth 214 is symmetrical from left to right. The tooth gap between two adjacent middle refraction teeth 214 is aligned with one LED of the lower LED light strip 22. The middle refraction teeth 214 guide the light to refract symmetrically to both sides.

[0051] As a preferred embodiment, the upper supplementary lighting assembly 30 further includes a spacer 33. The lower light-transmitting plate 21 is disposed parallel to the upper light-transmitting plate 31. The spacer 33 is disposed between the lower light-transmitting plate 21 and the upper light-transmitting plate 31, creating a spatial gap between them. This spacing reduces light emission interference between the upper light-transmitting plate 31 and the lower light-transmitting plate 21, allowing the upper light-transmitting plate 31 to better emit light downwards onto the lower light-transmitting plate 21.

[0052] In a preferred embodiment, the main lighting assembly 20 further includes a front light-shielding strip 23. The front light-shielding strip 23 is located on the side of the lower light-transmitting plate 21 that emits light outwards in the thickness direction. The front light-shielding strip 23 is located on the side of the lower light-transmitting plate 21 away from the upper light-transmitting plate 31. The front light-shielding strip 23 blocks the central refractive tooth 214, the left refractive tooth 212, and the right refractive tooth 213 of the lower light-transmitting plate 21. The front light-shielding strip 23 prevents light leakage through the gaps between the central refractive tooth 214, the left refractive tooth 212, and the right refractive tooth 213.

[0053] In a preferred embodiment, an upper light-shielding back panel 34 is provided on the side of the upper light-transmitting plate 31 away from the lower light-transmitting plate 21. The upper light-shielding back panel 34 covers the upper light-transmitting plate 31. The upper light-shielding back panel 34 can prevent light leakage from the back side, and the reflective structure can reflect light.

[0054] In a preferred embodiment, an upper light-shielding strip 35 is provided on the side of the upper light-transmitting plate 31 near the lower light-transmitting plate 21. The upper light-shielding strip 35 covers the lateral refractive teeth 314. The upper light-shielding strip 35 prevents light leakage through the gaps between the lateral refractive teeth 314.

[0055] In a preferred embodiment, the main lighting assembly 20 also includes a rear light-shielding plate 24. The rear light-shielding plate 24 is located on the side of the lower light-transmitting plate 21 closest to the upper light-transmitting plate 31. The rear light-shielding plate 24 covers the area of ​​the lower light-transmitting plate 21 not covered by the upper light-transmitting plate 31. The rear light-shielding plate 24 can prevent light leakage from the back side, and the reflective structure can reflect light.

[0056] In a preferred embodiment, the partition 33 forms a light-transmitting window through which the upper light-transmitting plate 31 transmits light downward to the lower light-transmitting plate 21. The partition 33 is a closed ring. The partition 33 encloses an area through which the upper light-transmitting plate 31 transmits light downward to the lower light-transmitting plate 21. The partition 33 ensures that the upper light-transmitting plate 31 and the lower light-transmitting plate 21 are spaced apart from each other, reducing luminous interference between the upper light-transmitting plate 31 and the lower light-transmitting plate 21, and allowing the upper light-transmitting plate 31 to better emit light downward to the lower light-transmitting plate 21. The partition 33 also blocks light leakage to the outer periphery.

[0057] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-layer optical light-transmitting plate illumination structure (100), characterized in that, include: The lower light-transmitting plate (21) for transmitting light outward, the lower LED light strip (22) as a light source, and two upper supplementary light components (30). The upper supplementary lighting component (30) includes: an upper light-transmitting plate (31) for supplementing light to the lower light-transmitting plate (21) and an upper LED light strip (32) as a light source; the light emitted by the upper LED light strip (32) is transmitted outward through the upper light-transmitting plate (31) and illuminates the lower light-transmitting plate (21); the light emitted by the lower LED light strip (22) and the light transmitted from the upper light-transmitting plate (31) are transmitted outward through the lower light-transmitting plate (21); both the lower LED light strip (22) and the upper LED light strip (32) are provided with multiple LED lights; The length direction, width direction and thickness direction are defined based on the lower light-transmitting plate (21); The lower light-transmitting plate (21) has a larger dimension in the length direction than in the thickness direction; the lower light-transmitting plate (21) transmits light outward along the thickness direction; The two upper supplementary lighting components (30) are located on the side of the lower light-transmitting plate (21) away from the outwardly transmitted light in the thickness direction, and the two upper supplementary lighting components (30) are respectively located at both ends of the lower light-transmitting plate (21) in the length direction; The multiple LEDs of the lower LED light strip (22) are arranged along the length of the lower light-transmitting plate (21), and the LEDs on the lower LED light strip (22) face the side of the lower light-transmitting plate (21). The multiple LEDs of the upper LED light strip (32) are arranged along the side of the upper light-transmitting plate (31) and face the upper light-transmitting plate (31).

2. The double-layer optical light-transmitting plate illumination structure (100) according to claim 1, characterized in that, The end faces of the two upper light-transmitting plates (31) that are close to each other are set as arc surfaces (311); the arc surfaces (311) make the upper light-transmitting plates (31) form long side surfaces (312) and short side surfaces (313) on both sides in the width direction; the length of the long side surface (312) is greater than the length of the short side surface (313); one end of the arc surface (311) is smoothly connected to the short side surface (313), and the other end of the arc surface (311) is connected to the long side surface (312).

3. The double-layer optical light-transmitting plate illumination structure (100) according to claim 2, characterized in that, The multiple LEDs of the upper LED light strip (32) are arranged along the short side surface (313) and the arc surface (311).

4. The double-layer optical light-transmitting plate illumination structure (100) according to claim 3, characterized in that, The short side (313) and the lower LED light strip (22) are located on the same side of the upper light-transmitting plate (31) in the width direction.

5. The double-layer optical light-transmitting plate illumination structure (100) according to claim 3, characterized in that, The short side (313) of the upper light-transmitting plate (31) is formed with a plurality of lateral refraction teeth (314) that guide light to refract away from the arc surface (311); each lateral refraction tooth (314) corresponds to an LED of the upper LED light strip (32); the lateral refraction tooth (314) forms a lateral refraction tooth front (315) and a lateral refraction tooth back (316); the LED corresponding to the lateral refraction tooth (314) is aligned with the lateral refraction tooth front (315); the lateral refraction tooth front (315) guides light to refract to the left; the brightness of the light passing through the lateral refraction tooth front (315) is greater than the brightness of the light passing through the lateral refraction tooth back (316).

6. The double-layer optical light-transmitting plate illumination structure (100) according to claim 5, characterized in that, The density of multiple LEDs in the upper LED strip (32) corresponding to the arc surface (311) is greater than the density of multiple LEDs in the upper LED strip (32) corresponding to the short side surface (313).

7. The double-layer optical light-transmitting plate illumination structure (100) according to claim 1, characterized in that, The lower light-transmitting plate (21) has a left refraction area and a right refraction area on the side facing the lower LED light strip (22); in the length direction, the left refraction area is located at the left end and the right refraction area is located at the right end; The left refraction area is provided with multiple left refraction teeth (212); each left refraction tooth (212) corresponds to one LED of the lower LED light strip (22); the left refraction tooth (212) forms a left tooth refraction front (2121) and a left tooth refraction back (2122); the center of the LED corresponding to the left refraction area is aligned with the front of the left refraction tooth (212); the front of the left refraction tooth (212) guides the light to refract to the left; the brightness of the light after passing through the left tooth refraction front (2121) is greater than the brightness of the light after passing through the left tooth refraction back (2122); The right refraction area is provided with multiple right refraction teeth (213); each right refraction tooth (213) corresponds to one LED of the lower LED light strip (22); the right refraction tooth (213) forms a right tooth refraction front (2131) and a right tooth refraction back (2132); the center of the LED corresponding to the right refraction area is aligned with the front of the right refraction tooth (213); the front of the right refraction tooth (213) guides the light to refract to the right; the brightness of the light passing through the right tooth refraction front (2131) is greater than the brightness of the light passing through the right tooth refraction back (2132).

8. The double-layer optical light-transmitting plate illumination structure (100) according to claim 7, characterized in that, The slope of the front side of the left refractive tooth (212) is gentler than that of the back side of the left refractive tooth (212); The slope of the front side of the right refraction tooth (213) is gentler than that of the back side of the right refraction tooth (213).

9. The double-layer optical light-transmitting plate illumination structure (100) according to claim 7, characterized in that, The lower light-transmitting plate (21) also has a medium refraction zone on the side facing the lower LED light strip (22); The intermediate refractive zone is located between the left refractive zone and the right refractive zone; the intermediate refractive zone is provided with a plurality of intermediate refractive teeth (214); the tooth shape of the intermediate refractive teeth (214) is symmetrical from left to right; the tooth gap of two adjacent intermediate refractive teeth (214) is aligned with one LED of the lower LED light strip (22).

10. The double-layer optical light-transmitting plate illumination structure (100) according to claim 1, characterized in that, The upper supplementary lighting component (30) further includes: a partition (33); the lower light-transmitting plate (21) is arranged parallel to the lower light-transmitting plate (21); the partition (33) is arranged between the lower light-transmitting plate (21) and the upper light-transmitting plate (31), so that a spatial gap is formed between the lower light-transmitting plate (21) and the upper light-transmitting plate (31).

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