Surface-emitting optical system

Abstract

The utility model relates to a kind of surface light emitting optical systems, including LED light source component, support and at least one light guide plate, the LED light source component and any light guide plate are installed on the support;Any the end face of the light guide plate is light entrance, and the side surface is respectively light exit and back surface opposite to light exit;Multiple recesses in sheet shape are arranged on the back surface;The light emitted by the LED light source component can enter light guide plate from light entrance, and uniform emission is carried out to light exit after the concave reflection of the recess, then uniform emission is carried out from light exit;Compared with prior art, the utility model uniform emission is carried out to light exit, and avoids part of light loss, improves light efficiency, reduces energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, specifically to a surface-emitting optical system. Background Technology

[0002] The continuous iteration of automotive technology is driving the transformation of the automotive lighting industry. The combination of LEDs and light guide plates is one of the most common surface-emitting optical systems in automotive lights. The light guide plate guides and controls the distribution of light, transforming the point or line light source emitted by the LED into a uniform surface light source, thus meeting the dual requirements of functionality and aesthetics in automotive lights. In existing technologies, one end of the light guide plate is the light-inlet surface, and the front side is the light-outlet surface. A textured surface is etched on the back of the light guide plate opposite the light-outlet surface. This irregular, fine structure reflects incident light in various directions, achieving uniform light emission. However, the textured surface is chaotic, reflecting light in all directions, and some light does not reach the light-outlet surface, resulting in low luminous efficiency and high energy consumption. Furthermore, existing optical systems typically only include a single light guide plate, failing to achieve three-dimensional lighting effects and not meeting the diverse design requirements of automotive lights. Utility Model Content

[0003] The purpose of this invention is to provide a surface-emitting optical system that addresses the problem that in existing automotive headlight surface-emitting optical systems, the light guide plate is etched with texture to achieve uniform light emission, but the light efficiency is low and the energy consumption is high.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A surface-emitting optical system includes an LED light source assembly, a bracket, and at least one light guide plate. The LED light source assembly and any one of the light guide plates are mounted on the bracket. One end face of any one of the light guide plates is a light-inlet surface, and the two sides are a light-outlet surface and a back surface opposite to the light-outlet surface, respectively. The back surface is provided with a plurality of recesses arranged in a sheet-like manner. The light emitted by the LED light source assembly can enter the light guide plate from the light-inlet surface, and after being reflected by the concave surface of the recesses, it is uniformly emitted to the light-outlet surface, and then uniformly emitted from the light-outlet surface.

[0006] The present invention, employing the aforementioned technical solution, eliminates the textured structure on the light guide plate in the prior art. Instead, it sets multiple recesses arranged in a sheet-like pattern on the back of the light guide plate. Light entering the light guide plate is reflected by the concave surfaces of these recesses. Unlike the chaotic textured structure, the concave structure of each recess is independently designed, allowing the concave surface to guide the reflected light, ensuring that the reflected light is evenly emitted to the light-emitting surface. This ensures uniform light emission from the light-emitting surface and avoids light loss caused by some reflected light not reaching the light-emitting surface, thus improving luminous efficiency and reducing energy consumption. Specifically, the shape, angle, size, and depth of each recess are... Based on the curvature and light emission direction of the local light-emitting surface area corresponding to its location, the characteristics of the concave part are calculated independently to ensure that each concave part guides the reflected light to the corresponding local light-emitting surface area. Thus, the concave surfaces of multiple concave parts arranged in a sheet-like manner can uniformly guide the reflected light to the light-emitting surface. Compared with the existing technology of the surface-emitting optical system of car lamps, which has a textured light guide plate etched to achieve uniform light emission but has low light efficiency and high energy consumption, the surface-emitting optical system provided by this utility model not only ensures uniform light emission from the light-emitting surface, but also avoids light loss caused by some reflected light not entering the light-emitting surface, thereby improving light efficiency and reducing energy consumption.

[0007] Furthermore, the multiple recesses are arranged in a rectangular array on the back surface; the regular arrangement of the recesses facilitates manufacturing.

[0008] Furthermore, the opening shape of the recess can be circular, strip-shaped, or polygonal; when the opening shape of the recess is circular, its concave surface is spherical; the shape of the recess is not limited, as long as it can achieve the above-mentioned reflective function.

[0009] Furthermore, the diameter of any of the recesses ranges from 0.1mm to 0.5mm, and the depth of any of the recesses ranges from 0.05mm to 0.1mm; the distance between any two adjacent recesses ranges from 0.1mm to 0.2mm; the recesses are extremely small in size and are arranged very densely on the back of the light guide plate, thereby ensuring that all or most of the light entering the light guide plate can be reflected.

[0010] Furthermore, it includes several light guide plates with the same light emission direction; along the light emission direction, several light guide plates are arranged sequentially at intervals, and no light guide plate is completely blocked by other light guide plates; with such a setting, the spatial layout of multiple light guide plates at the front and rear results in a three-dimensional light emission effect, which meets the diverse needs of vehicle headlight design.

[0011] Furthermore, it also includes a decorative frame installed on the bracket; along the light emission direction, the decorative frame blocks the light-incoming surface of the LED light source assembly and any light guide plate; the decorative frame can cover some appearance defects, and combined with the aesthetic effect of the decorative frame itself, the appearance of this optical system is better.

[0012] Furthermore, the LED light source assembly includes a PCB board and multiple LEDs; multiple condensers are arranged at intervals along the length direction on the light-inlet surface of any light guide plate; each LED corresponds to a condenser, and each LED is located at the light inlet of the corresponding condenser; by setting condensers on the light-inlet surface, light loss when LED light enters the light guide plate can be reduced, thereby improving the light efficiency of this optical system.

[0013] Furthermore, it also includes a light distribution lens and a base, which are fixedly installed to form a sealed inner cavity; the LED light source assembly, bracket and light guide plate are all installed in the inner cavity; the light emitting surface of any light guide plate is set opposite to the light distribution lens; the light distribution lens and the base play a sealing role, sealing the LED light source assembly, bracket and light guide plate in the inner cavity.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the surface-emitting optical system provided by this utility model not only ensures uniform light emission from the light-emitting surface, but also avoids light loss caused by some reflected light not entering the light-emitting surface, thereby improving light efficiency and reducing energy consumption. Attached image description:

[0015] Figure 1 This is a cross-sectional view of the present invention;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the central light guide plate;

[0018] Figure 4 This is a structural schematic diagram of the central light guide plate from another perspective.

[0019] Figure 5 for Figure 4 Cross-sectional view of PP in China;

[0020] Figure 6 for Figure 4 Enlarged view of A in the middle;

[0021] Figure 7 This is a diagram illustrating the luminous effect of this utility model.

[0022] The markings in the diagram are: 1-LED light source assembly, 11-PCB board, 12-LED lamp, 2-bracket, 3-light guide plate, 31-light inlet surface, 311-concentrator, 32-light outlet surface, 33-back side, 34-recess, 341-concave surface, 4-light distribution lens, 5-base, 6-decorative frame. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] A surface-emitting optical system, such as Figures 1-7 As shown, the light source assembly includes an LED light source component 1, a bracket 2, and at least one light guide plate 3. The LED light source component 1 and any one of the light guide plates 3 are mounted on the bracket 2. One end face of any one of the light guide plates 3 is a light-inlet surface 31, and the two sides are a light-outlet surface 32 and a back surface 33 opposite to the light-outlet surface 32, respectively. The back surface 33 has multiple recesses 34 arranged in a sheet-like pattern. Light emitted from the LED light source component 1 can enter the light guide plate 3 from the light-inlet surface 31, and after being reflected by the concave surface 341 of the recesses 34, it is uniformly emitted to the light-outlet surface 32, and then uniformly emitted from the light-outlet surface 32. Figure 5 As shown in the figure, the arrows indicate the direction of the light rays, illustrating the optical path diagram of how a recess 34 guides reflected light rays to the corresponding local light-emitting surface area;

[0026] Multiple recesses 34 are arranged in a rectangular array on the back surface 33;

[0027] The opening shape of the recess 34 is circular, strip-shaped, or polygonal; when the opening shape of the recess 34 is circular, its concave surface 341 is spherical; the diameter of any recess 34 ranges from 0.1mm to 0.5mm, and the depth of any recess 34 ranges from 0.05mm to 0.1mm; the distance between any two adjacent recesses 34 ranges from 0.1mm to 0.2mm.

[0028] The light guide plate 3 can be a single piece or multiple pieces. In this embodiment, to better achieve a three-dimensional shape, several light guide plates 3 with the same light emission direction are included. Along the light emission direction, the several light guide plates 3 are arranged sequentially at intervals, and no light guide plate 3 is completely blocked by other light guide plates 3. In this embodiment, three light guide plates 3 are included. The three light guide plates 3 are staggered relative to each other. Figure 1 Only the frontmost light guide plate 3 was cut out;

[0029] It also includes a decorative frame 6 mounted on the bracket 2; along the light-emitting direction, the decorative frame 6 blocks the light-inlet surface 31 of the LED light source assembly 1 and any light guide plate 3; except for a part of the back surface 33 of the light guide plate 3 near the light-inlet surface 31 (which is blocked by the decorative frame 6, so no recess 34 is provided), the other areas are covered with recesses 34.

[0030] The LED light source assembly 1 includes a PCB board 11 and multiple LED lamps 12; multiple condensers 311 are arranged at intervals along the length direction on the light-inlet surface 31 of any light guide plate 3; each LED lamp 12 corresponds to a condenser 311, and each LED lamp 12 is located at the light inlet of the corresponding condenser 311.

[0031] It also includes a light distribution lens 4 and a base 5, which are fixedly installed and together form a sealed inner cavity; the LED light source assembly 1, the bracket 2 and the light guide plate 3 are all installed in the inner cavity; the light-emitting surface 32 of any light guide plate 3 is set opposite to the light distribution lens 4;

[0032] Figure 7 The diagram shows the light emission effect of this optical system. It can be seen that the three light guide plates 3, arranged in a spatial manner with front and rear spacing, produce a three-dimensional light emission effect, which meets the diverse needs of vehicle headlight design.

[0033] The present invention, employing the aforementioned technical solution, eliminates the textured structure on the light guide plate in the prior art. Instead, it provides multiple recesses 34 arranged in a sheet-like pattern on the back of the light guide plate 3. Light entering the light guide plate 3 is reflected by the concave surfaces 341 of the recesses 34. Unlike the chaotic textured structure, the recesses 34 have independently designed structural features, allowing the concave surfaces 341 to guide the reflected light, ensuring that the reflected light is evenly emitted to the light-emitting surface 32. This ensures uniform light emission from the light-emitting surface 32 and avoids light loss caused by some reflected light not reaching the light-emitting surface 32, thus improving luminous efficiency and reducing energy consumption. Specifically, each recess... The shape, angle, size, depth, and other characteristics are independently calculated based on the curvature and light emission direction of the local light-emitting surface area corresponding to its location. This ensures that each concave part guides the reflected light to the corresponding local light-emitting surface area. In this way, the concave surfaces of multiple concave parts arranged in a sheet-like manner can uniformly guide the reflected light to the light-emitting surface. Compared with the existing technology of surface-emitting optical systems for automotive lamps, which have textured light guide plates etched to achieve uniform light emission but have low light efficiency and high energy consumption, the surface-emitting optical system provided by this utility model not only ensures uniform light emission from the light-emitting surface but also avoids light loss caused by some reflected light not entering the light-emitting surface, thereby improving light efficiency and reducing energy consumption.

[0034] This embodiment also provides a method for forming a light guide plate, used to manufacture the light guide plate 3 in the above-mentioned surface-emitting optical system, including the following steps: processing a mold by femtosecond laser to form a protrusion on the mold that corresponds to the concave portion 34 on the light guide plate 3; and then injection molding the light guide plate 3 using the mold.

[0035] In addition, another method for forming a light guide plate is provided for manufacturing the light guide plate 3 in the above-mentioned surface-emitting optical system, comprising the following steps: injection molding a semi-finished light guide plate without recesses 34 on the back side 33 by means of a mold; and then processing the recesses 34 on the semi-finished light guide plate by means of a femtosecond laser.

[0036] Whether the mold is processed by femtosecond laser and then the light guide plate is injection molded, or the semi-finished light guide plate is injection molded and then the recess is processed by femtosecond laser, the femtosecond laser processing technology is used. Its processing accuracy and efficiency are extremely high, ensuring that the precision of the recess structure of the light guide plate meets the design requirements, thereby guaranteeing the light efficiency and light emission uniformity of the above-mentioned surface-emitting optical system.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A surface-emitting optical system, characterized in that, The device includes an LED light source assembly (1), a bracket (2), and at least one light guide plate (3). The LED light source assembly (1) and any light guide plate (3) are mounted on the bracket (2). One end face of any light guide plate (3) is the light-inlet surface (31), and the two sides are the light-outlet surface (32) and the back surface (33) opposite to the light-outlet surface (32), respectively. The back surface (33) is provided with a plurality of recesses (34) arranged in a sheet shape. The light emitted by the LED light source assembly (1) can enter the light guide plate (3) from the light-inlet surface (31), and after being reflected by the concave surface (341) of the recesses (34), it is uniformly emitted to the light-outlet surface (32), and then uniformly emitted from the light-outlet surface (32).

2. The surface-emitting optical system according to claim 1, characterized in that, Multiple recesses (34) are arranged in a rectangular array on the back surface (33).

3. The surface-emitting optical system according to claim 1, characterized in that, The opening shape of the recess (34) is circular, strip-shaped or polygonal; when the opening shape of the recess (34) is circular, its concave surface (341) is spherical.

4. The surface-emitting optical system according to claim 1, characterized in that, The diameter of any of the recesses (34) ranges from 0.1 mm to 0.5 mm, and the depth of any of the recesses (34) ranges from 0.05 mm to 0.1 mm; the distance between any two adjacent recesses (34) ranges from 0.1 mm to 0.2 mm.

5. The surface-emitting optical system according to claim 1, characterized in that, It includes several light guide plates (3) with the same light output direction; along the light output direction, several light guide plates (3) are arranged in sequence at intervals, and no light guide plate (3) will be completely blocked by other light guide plates (3).

6. The surface-emitting optical system according to claim 5, characterized in that, It also includes a decorative frame (6) mounted on the bracket (2); along the light-emitting direction, the decorative frame (6) blocks the light-inlet surface (31) of the LED light source assembly (1) and any light guide plate (3).

7. The surface-emitting optical system according to claim 1, characterized in that, The LED light source assembly (1) includes a PCB board (11) and multiple LED lamps (12); multiple condensers (311) are arranged at intervals along the length direction on the light-inlet surface (31) of any light guide plate (3); each LED lamp (12) corresponds to a condenser (311), and each LED lamp (12) is located at the light inlet of the corresponding condenser (311).

8. The surface-emitting optical system according to claim 1, characterized in that, It also includes a light distribution lens (4) and a base (5), which are fixedly installed and enclosed to form a sealed inner cavity; the LED light source assembly (1), bracket (2) and light guide plate (3) are all installed in the inner cavity; the light-emitting surface (32) of any light guide plate (3) is set opposite to the light distribution lens (4).

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