Optical system for lightening periphery of light-emitting surface

Abstract

The optical system comprises an area light source A, an outer frame support A, a lens base A and a lens barrel A. The outer frame support A and the lens base A are assembled to form a lens set containing space, and a first lens structure, a second lens structure, a third lens A and a fourth lens A are sequentially assembled in the lens set containing space from the light emitting face to one side of the area light source A; the first lens structure comprises an inner layer and an outer layer surrounding the inner layer, the outer side surface of the inner layer forms a main light-emitting surface of an optical system light-passing area, and the outer side surface of the outer layer forms an auxiliary light-emitting surface outside the optical system light-passing area; the second lens structure comprises a second lens A and a light guide extension structure constructed in the peripheral area of the second lens A; the light guide extension structure and the outer layer are bridged to form a cap shape; the reflecting surface of the light guide extension structure is located on the outer peripheral surface of the hat brim, and the light-emitting surface of the light guide extension structure is located on the inner peripheral surface of the hat; and uniform lighting of the auxiliary light-emitting surface is realized.

Description

Technical Field

[0001] The invention relates to the technical field of projection lamps, and in particular discloses an optical system for lighting the periphery of a light-emitting surface. Background Art

[0002] Projection lamp systems in the prior art are such as Figure 1 、 Figure 2 As shown, it includes a light source 12, an outer frame bracket 10, a lens base 11, and a lens barrel 19. The outer frame bracket 10 and the lens base 11 are assembled with each other to form a lens storage space. The lens barrel 19 is correspondingly installed in the lens storage space and is arranged close to the light source 12. The lens storage space is assembled with a first lens 16, a second lens 15, a third lens 14, and a fourth lens 13 in sequence from the light emitting surface to the light source 12 side; the third lens 14 and the fourth lens 13 are correspondingly assembled in the lens barrel 19; one end of the light emitting surface includes a main light emitting surface 18 located in the light-transmitting area and an auxiliary light emitting surface 17 surrounding the main light emitting surface, as shown in FIG. Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, Figure 3 In the figure, A is the front view angle, and B is the side view angle. Since the auxiliary light-emitting surface is not directly illuminated by light, this area cannot be illuminated, thus affecting the integrity of the projection effect, the uniformity of the light-emitting surface, and the uniformity of the appearance of the light-emitting surface.

[0003] In addition, due to space limitations, the prior art generally does not want to add additional light sources to illuminate the auxiliary light-emitting surface, which makes the projection lamp have certain limitations in practical applications. For example, in some scenes that require high brightness and uniform lighting, such as stage lighting, teaching projection, etc., the projection lamps of the prior art are difficult to meet the needs. China Authorization Announcement No. CN114675479B, with an authorization announcement date of June 14, 2024, discloses a light guide, a projection system, a car light, a car, an optical system and its operation method; a light guide is used to be placed in the light-transmitting area of ​​the optical system, the light guide includes: a light port for the light of the first light source to pass through the light guide; a light incident surface for receiving the light of the second light source so that the light is incident into the light guide; a reflective surface for reflecting the light incident into the light guide by the light incident surface; and a light emitting surface for the light reflected by the reflective surface to pass out of the light guide to continue to transmit in the light-transmitting area; thereby, the light of the second light source is introduced into the light-transmitting area, increasing the light output range of the light-transmitting area of ​​the optical system. The existing structure primarily relies on the coordination of a light source and a lens assembly to project images through the refraction and reflection of light. However, this design has certain limitations in light distribution, particularly in the peripheral areas, resulting in insufficient light coverage on the auxiliary light output surface, which affects the overall projection effect. Furthermore, the existing technology adds an additional light guide to the four optical lenses, increasing assembly complexity. Therefore, the large number of lenses and their close arrangement in the existing technology not only increases manufacturing complexity but also may affect light transmission efficiency and stability.

[0004] Therefore, the existing technology has the following major defects in the design of projection lamps:

[0005] 1. The auxiliary light-emitting surface cannot be effectively illuminated: Since there is no direct light exposure to the auxiliary light-emitting surface, the area cannot be illuminated, affecting the uniformity and integrity of the projection, and also affecting the uniformity of the appearance of the light-emitting surface;

[0006] 2. Uneven light distribution: In the existing technology, light is mainly concentrated on the main light-emitting surface, and the brightness of the auxiliary light-emitting surface is insufficient, affecting the overall projection effect and appearance uniformity;

[0007] 3. Space limitations lead to complex design: Due to limited space, existing technologies usually do not add additional light sources, resulting in complex designs and difficulty in meeting the requirements of high brightness and uniform lighting;

[0008] 4. High manufacturing and maintenance costs: Due to the large number of lenses and complex arrangement, it not only increases the manufacturing difficulty, but may also affect the transmission efficiency and stability of light.

[0009] In summary, the existing technology has obvious deficiencies in the design of projection lamps, and there is an urgent need for a method that can ensure the original space size and achieve uniform light distribution without adding new light sources, thereby improving the projection effect and user experience. Summary of the Invention

[0010] Based on this, it is necessary to provide an optical system for lighting the periphery of the light-emitting surface to address the existing technical problems, which can ensure the original space size and achieve uniform lighting of the auxiliary light-emitting surface without adding new light sources.

[0011] To solve the problems of the prior art, the present invention discloses an optical system for lighting the periphery of a light-emitting surface, comprising a surface light source A, an outer frame bracket A, a lens holder A, and a lens barrel A. The outer frame bracket A and the lens holder A are assembled to form a lens group storage space. The lens barrel A is correspondingly installed in the lens group storage space and is arranged toward the side of the surface light source A. The lens group storage space is sequentially assembled with a first lens structure, a second lens structure, a third lens A, and a fourth lens A from the light-emitting surface to the side of the surface light source A.

[0012] The first lens structure includes an inner layer and an outer layer arranged around the inner layer, the outer side surface of the inner layer forms the main light-emitting surface of the optical system light-transmitting area, and the outer side surface of the outer layer forms the auxiliary light-emitting surface outside the optical system light-transmitting area;

[0013] The second lens structure includes a second lens and a light-guiding extension structure constructed in a peripheral area of ​​the second lens; the light-guiding extension structure and the outer layer are bridged to form a hat shape, forming a light path transmission interface; the reflective surface of the light-guiding extension structure is located on the outer peripheral surface of the brim of the hat, and the light-emitting surface of the light-guiding extension structure is located on the inner peripheral surface of the hat; the reflective surface of the light-guiding extension structure is provided with an optical texture;

[0014] After the light emitted from the surface light source A passes through the fourth lens A, the third lens A and the second lens A in sequence, the light outside the light-transmitting area guided out from the edge of the second lens A is totally reflected inside the light-guiding extension structure, thereby changing the angle of the light, and the light is guided out from the edge of the second lens A to the auxiliary light-emitting surface through the light-guiding extension structure.

[0015] Preferably, when the total reflection surface of the light-guiding extension structure is treated with leather grain, the inner layer and the outer layer are formed into an integral structure by two-color injection molding, and the inner layer and the outer layer of the integral structure are made of transparent optical material or diffuse optical material.

[0016] Preferably, when the total reflection surface of the light-guiding extension structure is treated with leather graining, the outer side surface of the outer layer is made of a transparent optical material or a diffusion optical material.

[0017] Preferably, the optical texture is composed of regularly arranged micro-surface relief structures.

[0018] Preferably, the inner layer is made of transparent optical material.

[0019] Preferably, the second lens A is made of transparent optical material.

[0020] Preferably, the third lens A is made of transparent optical material.

[0021] Preferably, the fourth lens A is made of transparent optical material.

[0022] Preferably, the outer layer is configured to be a transparent optical material or a diffusing optical material with a light-homogenizing function.

[0023] Preferably, the micro surface relief structure is configured as a raised or recessed optical pattern structure of square, diamond or irregular geometric units, and the micro surface relief structure is configured as a structure with superimposed bionic skin grain or a structure with non-superimposed bionic skin grain.

[0024] The beneficial effects of the present invention are as follows: by setting a second lens structure, the second lens structure includes a second lens A and a light-guiding extension structure constructed in the peripheral area of ​​the second lens A, so that the light emitted from the surface light source A passes through the fourth lens A, the third lens A and the second lens A in sequence, and the light outside the light-transmitting area guided out from the edge of the second lens A is totally reflected inside the light-guiding extension structure, thereby changing the angle of the light. The light is guided out from the edge of the second lens A to the auxiliary light-emitting surface through the light-guiding extension structure. On the one hand, the original space size is guaranteed, and on the other hand, the auxiliary light-emitting surface is evenly illuminated without adding a new light source, thereby improving the overall projection effect, appearance lighting effect and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional cross-sectional view of the prior art.

[0026] Figure 2 It is a cross-sectional view of the prior art.

[0027] Figure 3 Schematic diagram of observation angle.

[0028] Figure 4 This is a true color image from the existing technology.

[0029] Figure 5 This is a true color image from the side view angle of the existing technology.

[0030] Figure 6 This is a pseudo-color image from the existing technology.

[0031] Figure 7 This is a pseudo-color image from the side view angle of the existing technology.

[0032] Figure 8 This is an exploded view of the present invention.

[0033] Figure 9 It is a cross-sectional view of the present invention.

[0034] Figure 10 This is a cross-sectional view of the present invention (with light refraction path).

[0035] Figure 11 This is a three-dimensional view of the structure of the second lens A (optical pattern).

[0036] Figure 12 This is a true color image from the front view angle of the present invention.

[0037] Figure 13 This is a true color image from the side view angle of the present invention.

[0038] Figure 14 This is a pseudo-color image from the front view angle of the present invention.

[0039] Figure 15 This is a pseudo-color image of the side view angle of the present invention.

[0040] The figures are marked as: lens base A20, surface light source A21, lens barrel A23, fourth lens A22, third lens A24, light guide extension structure 25, outer layer 27, inner layer 26, outer frame bracket A28, texture 29, second lens structure 32, second lens A31, first lens structure 30, and light-transmitting area 33. DETAILED DESCRIPTION

[0041] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] refer to Figures 8 to 15 .

[0043] The present invention discloses an optical system for lighting the periphery of a light-emitting surface, comprising a surface light source A21, an outer frame bracket A28, a lens holder A20, and a lens barrel A23. The outer frame bracket A28 and the lens holder A20 are assembled to form a lens group storage space. The lens barrel A23 is correspondingly installed in the lens group storage space and is arranged toward the side of the surface light source A21. The lens group storage space is sequentially assembled with a first lens structure 30, a second lens structure 32, a third lens A24, and a fourth lens A22 from the light-emitting surface to the side of the surface light source A21.

[0044] The first lens structure 30 includes an inner layer 26 and an outer layer 27 disposed around the inner layer 26. The outer side surface of the inner layer 26 forms the main light-emitting surface 18 of the optical system light-transmitting area 33, and the outer side surface of the outer layer 27 forms the auxiliary light-emitting surface 17 outside the optical system light-transmitting area 33.

[0045] The second lens structure 32 includes a second lens A31 and a light-guiding extension structure 25 constructed in the peripheral area of ​​the second lens A31; the light-guiding extension structure 25 is bridged with the outer layer 27 to form a hat shape, forming a light path transmission interface; the reflective surface of the light-guiding extension structure 25 is located on the outer peripheral surface of the hat brim, and the light-emitting surface of the light-guiding extension structure 25 is located on the inner peripheral surface of the hat; the reflective surface of the light-guiding extension structure 25 is provided with an optical texture 29, which changes the angular distribution of light in the light-emitting direction. The optical texture 29 is composed of a regularly arranged micro-surface relief structure. The micro-surface relief structure is configured as a raised or recessed optical pattern structure of square, diamond or irregular geometric units, and the micro-surface relief structure is configured as a structure with superimposed bionic skin grain or a structure with non-superimposed bionic skin grain. This embodiment utilizes the principle of total reflection and uses the light-guiding extension structure 25 to cause total reflection of light inside the light-guiding extension structure 25, causing the light to change its angle.

[0046] After the light emitted from the surface light source A21 passes through the fourth lens A22, the third lens A24 and the second lens A31 in sequence, the light outside the light-transmitting area 33 guided out from the edge of the second lens A31 is totally reflected inside the light-guiding extension structure 25, thereby changing the angle of the light. The light is then guided out from the edge of the second lens A31 to the auxiliary light-emitting surface 17 through the light-guiding extension structure 25.

[0047] When the total reflection surface of the light guide extension structure 25 is treated with leather grain, the inner layer 26 and the outer layer 27 are formed into an integral structure by two-color injection molding, and the inner layer 26 and the outer layer 27 of the integral structure are made of transparent optical material or diffuse optical material.

[0048] When the total reflection surface of the light guide extension structure 25 is treated with leather grain, the outer side surface of the outer layer 27 is made of a transparent optical material or a diffusion optical material.

[0049] The inner layer 26 is configured to be a transparent optical material. In this embodiment, the inner layer 26 is configured to be PMMA.

[0050] The second lens A31 is made of a transparent optical material. In this embodiment, the second lens A31 is made of PC.

[0051] The third lens A24 is made of a transparent optical material. In this embodiment, the third lens A24 is made of glass.

[0052] The fourth lens A22 is made of a transparent optical material. In this embodiment, the fourth lens A22 is made of glass.

[0053] The outer layer 27 is made of a transparent optical material or a diffusion optical material having a light-homogenizing function. In this embodiment, the outer layer 27 is made of a diffusion optical material having a light-homogenizing function.

[0054] In this embodiment, a second lens structure 32 is provided, and the second lens structure 32 includes a second lens A31 and a light-guiding extension structure 25 constructed in the peripheral area of ​​the second lens A31. After the light emitted from the surface light source A21 passes through the fourth lens A22, the third lens A24 and the second lens A31 in sequence, the light outside the light-transmitting area derived from the edge of the second lens A31 is totally reflected inside the light-guiding extension structure 25, thereby changing the angle of the light. The light is derived from the edge of the second lens A31 to the auxiliary light-emitting surface through the light-guiding extension structure 25. On the one hand, the original space size is guaranteed, and on the other hand, the auxiliary light-emitting surface is evenly illuminated without adding a new light source, thereby improving the overall projection effect, appearance lighting effect and user experience.

[0055] The above-described embodiment merely represents one embodiment of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An optical system for lighting the periphery of a light-emitting surface, comprising a surface light source A (21), an outer frame bracket A (28), a lens holder A (20), and a lens barrel A (23), wherein the outer frame bracket A (28) and the lens holder A (20) are assembled with each other to form a lens group storage space, and the lens barrel A (23) is correspondingly installed in the lens group storage space and is arranged close to the side of the surface light source A (21), characterized in that: The lens group storage space is sequentially assembled with a first lens structure (30), a second lens structure (32), a third lens A (24), and a fourth lens A (22) from the light-emitting surface to one side of the surface light source A (21); The first lens structure (30) comprises an inner layer (26) and an outer layer (27) arranged around the inner layer (26), the outer side surface of the inner layer (26) forming a main light-emitting surface (18) of the optical system light-transmitting area (33), and the outer side surface of the outer layer (27) forming an auxiliary light-emitting surface (17) outside the optical system light-transmitting area (33); The second lens structure (32) comprises a second lens A (31) and a light-guiding extension structure (25) constructed in a peripheral area of ​​the second lens A (31); the light-guiding extension structure (25) and the outer layer (27) are bridged to form a hat shape, forming a light path transmission interface; the reflection surface of the light-guiding extension structure (25) is located on the outer peripheral surface of the brim of the hat, and the light-emitting surface of the light-guiding extension structure (25) is located on the inner peripheral surface of the hat; the reflection surface of the light-guiding extension structure (25) is provided with an optical texture (29); After the light emitted from the surface light source A (21) passes through the fourth lens A (22), the third lens A (24) and the second lens A (31) in sequence, the light outside the light-transmitting area (33) guided out from the edge of the second lens A (31) is totally reflected inside the light-guiding extension structure (25), thereby changing the angle of the light, and the light is guided out from the edge of the second lens A (31) to the auxiliary light-emitting surface (17) through the light-guiding extension structure (25).

2. The optical system for lighting the periphery of a light-emitting surface according to claim 1, characterized in that: When the total reflection surface of the light-guiding extension structure (25) is treated with leather grain, the inner layer (26) and the outer layer (27) are formed into an integral structure by two-color injection molding, and the inner layer (26) and the outer layer (27) of the integral structure are made of transparent optical material or diffuse optical material.

3. The optical system for lighting the periphery of a light-emitting surface according to claim 2, characterized in that: When the total reflection surface of the light-guiding extension structure (25) is treated with leather grain, the outer side surface of the outer layer (27) is made of a transparent optical material or a diffusion optical material.

4. The optical system for lighting the periphery of a light-emitting surface according to claim 1, characterized in that: The optical texture (29) is composed of regularly arranged micro-surface relief structures.

5. An optical system for lighting the periphery of a light-emitting surface according to any one of claims 1 to 4, characterized in that: The inner layer (26) is configured as a transparent optical material.

6. An optical system for lighting the periphery of a light-emitting surface according to any one of claims 1 to 4, characterized in that: The second lens A (31) is made of transparent optical material.

7. The optical system for lighting the periphery of a light-emitting surface according to claim 1, characterized in that: The third lens A (24) is made of transparent optical material.

8. An optical system for lighting the periphery of a light-emitting surface according to any one of claims 1 to 4, characterized in that: The fourth lens A (22) is made of transparent optical material.

9. The optical system for lighting the periphery of a light-emitting surface according to any one of claims 1 to 4, characterized in that: The outer layer (27) is configured as a transparent optical material or a diffusing optical material having a light homogenizing function.

10. The optical system for lighting the periphery of a light-emitting surface according to claim 4, characterized in that: The micro surface relief structure is configured as a raised or recessed optical pattern structure of square, diamond or irregular geometric units, and the micro surface relief structure is configured as a structure with bionic skin grain superimposed thereon or a structure with bionic skin grain not superimposed thereon.

Images