Light emitting device and lighting equipment

Abstract

The invention relates to the technical field of lighting, in particular to a light emitting device and lighting equipment, comprising a main lens, a side lens and a lamp panel; the side lens and the main lens form a lens body in a surrounding mode. The lens body is provided with a light outlet part, a main light inlet part and a side light inlet part, the main light-in part is arranged on the side, provided with the light-in part, of the lens body. The lamp panel is provided with a main light source and a side light source. A light incident groove is formed in the middle of the main light incident part, the main light source can extend into the light incident groove, and a reflecting surface is arranged on the peripheral side of the main light incident part; the light incident groove is formed between the main light incident part and the main light source, so that light emitted by the main light source can pass through two media, namely air in the light incident groove and the lens to be refracted, and the light emitted by the main lens is ensured not to be influenced by the side lens through the reflecting surface on the peripheral side of the main light incident part, so that the main light source has a better light spot effect, and the light emitting efficiency of the main lens is improved. And meanwhile, the side light source is ensured to emit light in a collimating manner through the side light incidence part, so that a uniform and large-angle light spot effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of lighting technology, and in particular to a light emitting device and lighting equipment. Background Art

[0002] Among conventional lighting devices, a flashlight is a portable lighting tool, typically powered by batteries and powered by a bulb or LED. Due to its widespread use in various lighting scenarios, such as nighttime hunting, a single white light is no longer sufficient. Flashlights are required to combine concentrated, flood, and multi-color light to avoid the drawbacks of white light glare, which can disturb animals or expose the user.

[0003] At present, flashlights generally have multi-light source lenses in front of the light panel, which are combined into a light-emitting device to meet the needs of multiple light colors. The mainstream multi-light source lenses are single light sources with single optical lenses, so that the light spot can be uniform and round. There are also a few solutions that place multiple light sources in the same lens, so that the core white light has enough space design to ensure the performance of the product to a large extent.

[0004] However, the main light source and the side light source of the existing light emitting device affect each other, resulting in poor light spot effect of the main light source and poor light uniformity of the side light source. Summary of the Invention

[0005] The purpose of the present invention is to provide a light emitting device and lighting equipment to solve the technical problem in the prior art that the main light source and the side light source of the light emitting device affect each other, resulting in poor light spot effect of the main light source and poor light uniformity of the side light source.

[0006] In a first aspect, the present invention provides a light emitting device comprising a main lens, a side lens and a light board;

[0007] The side lens is arranged on the peripheral side of the main lens, and the side lens and the main lens are integrally formed to form a lens body, the lens body has a light exit portion and a light entrance portion, and the light entrance portion includes a main light entrance portion and a side light entrance portion that are spaced apart;

[0008] The main light incident portion is provided on a side of the lens body having the light incident portion, and the light board is provided with a main light source corresponding to the main lens and a side light source corresponding to the side lens;

[0009] A light entrance groove is provided in the middle of the main light entrance portion, the main light source is provided in the light entrance groove, the main light source can extend into the light entrance groove, and a reflecting surface is provided on the peripheral side of the main light entrance portion.

[0010] Furthermore, the light incident groove is cylindrically arranged along the direction from the light incident portion to the light exit portion, the side light incident portion is arranged on the side lens, and the side light incident portion extends cylindrically along the direction from the light exit portion to the side light source.

[0011] Furthermore, the radius R of the side light incident portion and the length h of the side light incident portion satisfy the following formula:

[0012]

[0013] Wherein n is the refractive index of the lens body.

[0014] Furthermore, the depth h of the light entrance groove is c is greater than one quarter of the length h of the side light incident portion, and the depth h of the light incident groove is c Less than three quarters of the length h of the side light incident portion;

[0015] Wherein h is the length of the side light incident portion.

[0016] Furthermore, the depth h of the light entrance groove is c The radius r0 of the light entrance groove satisfies the following formula:

[0017] r0=h c tanθ div

[0018] Among them, θ div is the critical angle of incidence of the light from the main light source.

[0019] Furthermore, the reflecting surface is in an arc shape, and the reflecting surface gradually approaches the side light incident portion along the direction from the light incident portion to the light exit portion.

[0020] Furthermore, a plurality of the side lenses are evenly spaced and arranged around the main lens, and a plurality of the side light sources are arranged in one-to-one correspondence with the side lenses.

[0021] Furthermore, the lens body is made of polycarbonate material.

[0022] In a second aspect, the present invention further provides a lighting device comprising the above-mentioned light emitting device.

[0023] Compared with the prior art, the present invention provides a light-emitting device, comprising a main lens, a side lens and a light board; the side lens is arranged on the peripheral side of the main lens, and the side lens and the main lens are integrally formed to form a lens body, the lens body has a light-emitting portion and a light-entering portion, and the light-entering portion includes a main light-entering portion and a side light-entering portion arranged at intervals; the main light-entering portion is arranged on one side of the lens body having the light-entering portion, and the light board is provided with a main light source corresponding to the main lens and a side light source corresponding to the side lens; a light-entering groove is provided in the middle of the main light-entering portion, the main light source is provided in the light-entering groove, the main light source can extend into the light-entering groove, and a reflecting portion is provided on the peripheral side of the main light-entering portion surface; by arranging a light entrance groove between the main light entrance part and the main light source, the light emitted by the main light source can pass through the two media of air and lens in the light entrance groove to generate refraction, and through the reflection surface on the side of the main light entrance part, it is ensured that the light output of the main lens is not affected by the side lens, thereby making the main light source have a better light spot effect, while also ensuring the lens angle, and at the same time, through the side light entrance part, ensuring the collimated light output of the side light source, achieving a uniform large-angle light spot effect, solving the technical problem that the main light source and the side light source of the light output device in the prior art affect each other, resulting in poor light spot effect of the main light source and poor light uniformity of the side light source, thereby ensuring the light output effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A cross-sectional view of the overall structure of the light emitting device provided by an embodiment of the present invention;

[0026] Figure 2 A cross-sectional view of the overall structure of a lens body in a light output device provided by an embodiment of the present invention;

[0027] Figure 3 A light path simulation diagram of Example 1 of the light emitting device provided by an embodiment of the present invention;

[0028] Figure 4 This is a light path simulation diagram of Example 2 of the light emitting device provided in an embodiment of the present invention.

[0029] Reference numerals:

[0030] 10. Lens body; 101. Light entrance portion; 102. Main light entrance portion; 103. Side light entrance portion;

[0031] 100, main lens; 110, light entrance groove;

[0032] 200, side lens;

[0033] 300, light board; 310, main light source; 320, side light source. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0039] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0041] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a light emitting device, including a main lens, a side lens and a light board; the side lens is arranged on the peripheral side of the main lens, and the side lens and the main lens are integrally formed to form a lens body, the lens body has a light emitting portion and a light input portion, the light input portion includes a main light input portion and a side light input portion that are spaced apart; the main light input portion is arranged on the side of the lens body having the light input portion, and a main light source corresponding to the main lens and a side light source corresponding to the side lens are arranged on the light board; a light input groove is provided in the middle of the main light input portion, the main light source can extend into the light input groove, and a reflecting surface is provided on the peripheral side of the main light input portion.

[0042] That is, the light emitting device provided by the embodiment of the present invention sets a light entrance groove between the main light entrance part and the main light source, so that the light emitted by the main light source can pass through the two media of air and lens in the light entrance groove to produce refraction, and the reflection surface on the side of the main light entrance part ensures that the light output of the main lens is not affected by the side lens, thereby making the main light source have a better light spot effect while also ensuring the lens angle. At the same time, the side light entrance part ensures that the side light source is collimated to achieve a uniform large-angle light spot effect, which solves the technical problem in the prior art that the main light source and the side light source of the light emitting device affect each other, resulting in poor light spot effect of the main light source and poor light uniformity of the side light source, thereby ensuring the light output effect.

[0043] Specifically, in the light emitting device provided by the embodiment of the present invention, the main lens and the side lens are made of the same material and are integrally molded, and the two together constitute a lens body. The main lens is in the shape of an inverted truncated cone, with the top as the light emitting part and the bottom as the light input part. The side lens is arranged around the main lens with the central axis of the main lens as the axis. In this embodiment, the side lens extends in a direction parallel to the central axis of the main lens, so that the side light input part on the side lens and the main light input part of the main lens can be separated. A light input groove is provided in the middle of the main light input part, and the main light source can extend into the light input groove, so that the light generated by the main light source first enters the air in the light input groove and propagates, and then propagates through the main lens, thereby allowing the light emitted by the main light source to pass through the two media of the air and the lens in the light input groove to produce refraction, thereby playing a role in converging the light path and ensuring the performance and light spot of the main light source. The side wall of the main lens is set as a reflective surface, so that the light entering the main lens from the side of the light input groove can be reflected and converged by the reflective surface, avoiding the mutual influence of the light output of the main light source and the auxiliary light source.

[0044] Preferably, the lens body is made of polycarbonate material.

[0045] Specifically, in this embodiment, the lens body is made of polycarbonate, which has a refractive index of approximately 1.59, while the refractive index of air is 1. This allows light to enter a less dense medium from an optically dense medium, causing the light to be reflected between the reflective surface and the lens body. Preferably, the light entrance groove is cylindrically arranged along the direction from the light entrance portion to the light exit portion, and the side light entrance portion is arranged on the side lens, extending cylindrically along the direction from the light exit portion to the side light source.

[0046] Specifically, the side light incident portion is cylindrical as a whole, the side light source is arranged at one end of the side light incident portion, and its geometric center is coaxially arranged with the side light incident portion. Thus, the side light source can be ensured to emit light in a collimated manner through the side light incident portion to achieve a uniform large-angle light spot effect.

[0047] Furthermore, a plurality of side lenses are evenly spaced and arranged around the main lens, and a plurality of side light sources are arranged in one-to-one correspondence with the side lenses.

[0048] Specifically, in this embodiment, two side lenses are provided, one on either side of the main lens. In other embodiments of the present application, multiple side lenses may be provided as needed, as long as the side lenses are evenly spaced around the main lens to ensure the light spot effect of the side light source. Correspondingly, the number and distribution of the side light sources correspond one-to-one with the number and distribution of the side lenses.

[0049] Preferably, the reflecting surface is in an arc shape, and the reflecting surface gradually approaches the side light incident portion along the direction from the light incident portion to the light exit portion.

[0050] Specifically, the reflecting surface is arc-shaped, and the reflecting surface gradually approaches the side light incident part along the direction from the light incident part to the light exiting part. Thus, the radius of the main light incident part can gradually increase along the direction from the light incident part to the light exiting part, so as to form a gradually increasing reflection area between the side surface of the light incident groove and the reflecting surface, and reflect the light in this area towards...

[0051] The light exiting device provided by the embodiment of the present invention focuses on optimizing the structural parameters of the light exiting groove and the side light incident part. Preferably, the groove depth h of the light incident groove c and the radius r0 of the light incident groove satisfy the following formula;

[0052] r0 = h c tanθ div

[0053] where, θ div is the incident critical angle of the light of the main light source.

[0054] Specifically, in this embodiment, the area where the light rays passing through the circular surface at the top of the light incident groove are distributed is defined as the central projection light exiting area, and the area where the light rays passing through the side surface of the light incident groove are distributed is defined as the peripheral total reflection light exiting area. After the light rays pass through the side surface of the light incident groove, they will irradiate on the reflecting surface of the main light incident part, and then be totally reflected and turned towards the light exiting part. θ div is the critical angle between the light rays of the main light source entering the central transmission light exiting area and entering the peripheral total reflection light exiting area. In this embodiment, the groove depth h of the light incident groove c and the radius r0 of the light incident groove satisfy the formula r0 = h c tanθ div , thus, by adjusting the groove depth h of the light incident groove c the exit position of the light rays from the refraction to the total reflection area can be adjusted, reducing the variables to be controlled, and further ensuring that the incident angle of the light rays does not exceed the critical angle, avoiding the light rays from being unable to be totally reflected after bouncing off the reflecting surface.

[0055] Preferably, the groove depth h of the light incident groove c is greater than one-fourth of the length h of the side light incident part, and the groove depth h of the light incident groove c is less than three-fourths of the length h of the side light incident part; where h is the length of the side light incident part.

[0056] Specifically, the groove depth h of the light incident groove in this embodiment c and the length h of the side light incident part satisfy the relationship of 1 / 4h < hc < ¾h. Since the length h of the side light incident part determines the highest height of the outer reflecting surface of the main light incident part, when the groove depth h of the light incident groove c ]When the depth h is greater than three-quarters of the length h of the side light incident portion, the light entering the peripheral total reflection light exit area from the side of the light incident groove cannot be completely reflected by the reflective surface and enters the side light incident portion, thereby affecting the lighting effect of the side light source. c When it is greater than one quarter of the length h of the side light incident portion, the depth of the light incident groove will be too shallow, making it difficult to meet the installation requirements of the main light source.

[0057] Preferably, the radius R of the side light incident portion and the length h of the side light incident portion satisfy the following formula:

[0058]

[0059] Where n is the refractive index of the lens.

[0060] Specifically, due to the structural limitations of the lamp, the installation dimensions of the light output device are fixed, so the center distance between the side light input portion and the main light input portion is fixed. Therefore, the larger the radius R of the light input portion, the smaller the length h of the side light input portion. In this embodiment, the radius R of the light input portion and the length h of the side light input portion satisfy the following formula: It can ensure that the light is fully reflected at the boundary, ensuring that the main light and side light paths do not interfere with each other.

[0061] like Figure 3 and Figure 4 As shown, based on the optimization results of the structural parameters of the light exit groove and the side light incident portion, this embodiment provides two comparative cases.

[0062] Case 1: This case complies with all the above formulas. The specific parameters are set as follows: the depth of the light entrance groove hc is 3.5mm, the radius R of the side light entrance is 1.5mm, the length h of the side light entrance is 4.33mm, and the critical angle of incidence of the main light source is θ. div The main light source distribution simulation in Case 1 is as follows: Figure 3 As shown in the figure, the main light source is completely reflected by the reflective surface, thus preventing the light from the main lens and the side lens from interfering with each other. The main light source has a good spot effect and a clear focusing effect, which ensures the product has high long-range transmission. At the same time, the side light source is not affected by the optical system of the main light source, achieving uniform light output from multiple light sources in a single lens.

[0063] Case 2: The specific parameters of this case are as follows: the depth of the light entrance groove hc is 2.2mm, the radius R of the side light entrance is 1.5mm, the length h of the side light entrance is 1.7mm, and the critical angle of incidence of the main light source is θ. div The main light source distribution simulation in Case 2 is as follows: Figure 4As shown in the figure, the light emitted by the main light source is not completely reflected by the reflective surface. Some light enters the side light input part, resulting in the main light source's light not being collimated and generating a lot of stray light. The main light source and the side light source affect each other, resulting in poor main light spot effect and poor light uniformity from the side light source.

[0064] Example 2

[0065] The present invention also provides a lighting device, which includes all the technical features of the above-mentioned light-emitting device, and can naturally achieve all the above-mentioned technical effects. This embodiment will not be described in detail.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light emitting device, characterized in that: Including main lens, side lens and light panel; The side lens is arranged on the peripheral side of the main lens, and the side lens and the main lens are integrally formed to form a lens body, the lens body has a light exit portion and a light entrance portion, and the light entrance portion includes a main light entrance portion and a side light entrance portion that are spaced apart; The main light incident portion is provided on a side of the lens body having the light incident portion, and the light board is provided with a main light source corresponding to the main lens and a side light source corresponding to the side lens; A light incident groove is provided in the middle of the main light incident portion, and the main light source can extend into the light incident groove. A reflecting surface is provided on the peripheral side of the main light incident portion.

2. The light emitting device according to claim 1, characterized in that: The light incident groove is cylindrically arranged along the direction from the light incident portion to the light exit portion, the side light incident portion is arranged on the side lens, and the side light incident portion extends cylindrically along the direction from the light exit portion to the side light source.

3. The light emitting device according to claim 2, characterized in that: The radius R of the side light incident portion and the length h of the side light incident portion satisfy the following formula: Wherein n is the refractive index of the lens body.

4. The light emitting device according to claim 3, characterized in that: The depth of the light entrance groove h c is greater than one quarter of the length h of the side light incident portion, and the depth h of the light incident groove is c Less than three quarters of the length h of the side light incident portion; Wherein h is the length of the side light incident portion.

5. The light emitting device according to claim 3, characterized in that: The depth of the light entrance groove h c The radius r0 of the light entrance groove satisfies the following formula: r0=h c tanθ div Among them, θ div is the critical angle of incidence of the light from the main light source.

6. The light emitting device according to any one of claims 1 to 5, characterized in that: The reflecting surface is in an arc shape, and the reflecting surface gradually approaches the side light incident portion along a direction from the light incident portion to the light exit portion.

7. The light emitting device according to any one of claims 1 to 5, characterized in that: The side lenses are evenly spaced and arranged around the main lens, and the side light sources are arranged in one-to-one correspondence with the side lenses.

8. The light emitting device according to any one of claims 1 to 5, characterized in that: The lens body is made of polycarbonate material.

9. A lighting device, characterized in that: The light emitting device comprises the light emitting device according to any one of claims 1 to 8.

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