Multi-primary-color powder-free LED color mixing primary lens

Abstract

The utility model provides a multi-primary-color powder-free LED color mixing primary lens. The multi-primary-color powder-free LED color mixing primary lens comprises a lens body and a plurality of light sources with different wavelengths. Wherein the lens main body is hemispherical, and the surface of the lens main body is covered with convex structures; the light source is arranged in the bottom plane of the lens body and emits light in the spherical surface direction of the lens body. The multi-primary-color powder-free LED color mixing primary lens provided by the utility model has a good light mixing effect, and the luminous efficiency of a light source can be well exerted.

Description

Technical Field

[0001] The utility model relates to the technical field of LED color mixing, in particular to a multi-primary color powder-free LED color mixing primary lens. Background Art

[0002] Light-emitting diodes have the advantages of long service life, high light efficiency, no pollution, energy saving, short response time, etc., so they are widely used in many fields such as indoor and outdoor lighting, backlight, etc. However, the light emitted by a single LED chip is monochromatic, and the color rendering index is not high. In order to meet people's higher pursuit of light quality, it is usually adopted to mix LED chips of different colors on the same substrate to form a multi-primary color powder-free LED to improve the light quality of the entire light source.

[0003] However, the primary lens of ordinary LED light sources is a smooth hemispherical lens. Due to the spatial position difference of the chip and the refractive index deviation of different colored lights, the emitted light and the formed light spot will have color stratification problems, that is, dispersion and rainbow color blocks will appear. Since the refraction of light on the surface of the smooth hemispherical lens is not specially processed, the conventional smooth hemispherical lens has almost no color mixing effect.

[0004] To this end, as an improvement, the surface of the primary lens of the existing LED light source will be frosted, which improves the color mixing effect of the multi-primary color powder-free LED light source to a certain extent. However, since the optical efficiency will be greatly reduced after the primary lens surface is frosted, the advantages of high LED lighting efficiency and energy saving cannot be maximized. Utility Model Content

[0005] The utility model aims to provide a multi-primary color powder-free LED color mixing primary lens, so as to solve the technical problem that the traditional primary lens has poor color mixing effect.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a multi-primary color powder-free LED color mixing primary lens, the multi-primary color powder-free LED color mixing primary lens comprising:

[0007] A lens body, wherein the lens body is hemispherical and the surface of the lens body is covered with protruding structures;

[0008] A plurality of light sources with different wavelengths are arranged in the bottom plane of the lens body, and the light sources emit light toward the spherical surface of the lens body.

[0009] In one embodiment, the protruding structure is a hemisphere.

[0010] In one embodiment, the diameters of the hemispheres of the protruding structures are different.

[0011] In one embodiment, the lens body is a transparent optical silicone hemisphere.

[0012] In one embodiment, the light source and the lens body are configured into an integrated structure through a molding process.

[0013] In one embodiment, the bottom plane of the lens body is coated with a light-shielding coating.

[0014] One or more of the above technical solutions in the embodiments of the present utility model have at least the following technical effects or advantages:

[0015] The multi-primary color powder-free LED color mixing primary lens provided by the embodiment of the utility model is provided with protrusion structures all over the surface of the lens body, and light sources of different wavelengths (that is, light sources of different colors) are provided in the bottom plane of the lens body. The light source can be an LED chip, and the LED chip is connected to an external power source through a wire or the like. Figure 1 (not shown), and the light source is directed toward the spherical surface of the lens body. The light emitted by the light source is conducted through the lens body, and then refracted on the surface of the lens body. Since the surface of the lens body is composed of many tiny protruding structures, light of different colors is emitted irregularly in all directions after refraction, and the light is chaotic and disordered, so good color mixing of the light is achieved. And since the lens body itself is made of optically transparent material and basically does not absorb light, the light emitted by the light source and passing through the lens surface are all refraction relationships, and the light is refracted smoothly, so the light transmittance of the lens is very high, so that the light emitted by the light source is basically not attenuated after passing through the lens body. In summary, the multi-primary color powder-free LED color mixing single lens provided in this embodiment has a good light mixing effect, and can give full play to the luminous efficiency of the light source (brightness and other parameters). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic structural diagram of a multi-primary color powder-free LED color mixing primary lens provided in an embodiment of the utility model.

[0018] The respective reference numerals are as follows:

[0019] 1. The first light source emits light; 2. The first light source; 3. The second light source emits light; 4. The second light source; 5. The third light source emits light; 6. The third light source; 7. The raised structure; 8. The lens body; 9. The normal line; 10. The third light source emits a refracted line of light; 11. The second light source emits a refracted line of light; 12. The first light source emits a refracted line of light. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1 The embodiment of the present application provides a multi-primary color powder-free LED color mixing primary lens, comprising a lens body 8, a plurality of light sources with different wavelengths ( Figure 1Only the first light source 2, the second light source 4 and the third light source 6 are drawn, and more light sources can be provided in practice). The lens body 8 is hemispherical, and the surface of the lens body 8 is covered with protrusion structures 7; the light source is provided in the bottom plane of the lens body 8, and the light source emits light toward the spherical surface of the lens body 8.

[0025] Optionally, the raised structure 7 may be a small high-curvature surface, specifically a hemisphere. In addition, in order to enable the lens body 8 to better refract the light emitted by each light source in a disordered manner, the diameters of the hemispheres of the raised structure 7 may be set to different sizes to facilitate the disordered refraction of light and improve the light mixing effect.

[0026] The multi-primary color powder-free LED color mixing primary lens provided in this embodiment is provided with protrusion structures 7 all over the surface of the lens body 8, and light sources of different wavelengths (i.e., light sources of different colors) are provided in the bottom plane of the lens body 8. The light source can be an LED chip, and the LED chip is connected to an external power source through a wire or the like. Figure 1 (not shown), and the light source is directed toward the spherical direction of the lens body 8. The light emitted by the light source is conducted inside the lens body 8, and then refracted on the surface of the lens body 8. Since the surface of the lens body 8 is composed of many tiny protruding structures 7, light of different colors is emitted irregularly in various directions after refraction, and the light is chaotic and disordered, so good color mixing of the light is achieved. And since the lens body 8 itself is made of optically transparent material and basically does not absorb light, the light emitted by the light source and passing through the lens surface are all refraction relationships, and the light is refracted smoothly, so the light transmittance of the lens is very high, so that the light emitted by the light source is basically not attenuated after passing through the lens body 8. In summary, the multi-primary color powder-free LED color mixing single lens provided in this embodiment has a good light mixing effect and can give full play to the luminous efficiency of the light source.

[0027] like Figure 1 As shown, the light emitted by each light source interacts with each other after being refracted by the protruding structure 7 to achieve color mixing.

[0028] In one embodiment, the lens body 8 is a transparent optical silicone hemisphere. The lens body 8 made of transparent optical silicone has high transparency and high refractive index, and compared with a lens made of glass, it has excellent mechanical properties (higher strength and hardness, and can resist certain external impacts and pressures).

[0029] In one embodiment, the light source and the lens body 8 are configured into an integrated structure through a molding process.

[0030] In one embodiment, a light-shielding coating is applied to the bottom plane of the lens body 8. By applying the light-shielding coating to the bottom plane of the lens body 8, stray light from the outside is prevented from entering the lens body 8 from the bottom plane of the lens body 8 and affecting the color mixing effect of the lens.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-primary color powder-free LED color mixing primary lens, It is characterized in that The multi-primary color powder-free LED color mixing primary lens comprises: A lens body, wherein the lens body is hemispherical and the surface of the lens body is covered with protruding structures; A plurality of light sources with different wavelengths are arranged in the bottom plane of the lens body, and the light sources emit light toward the spherical surface of the lens body.

2. A multi-primary color powder-free LED color mixing primary lens according to claim 1, Features: The protruding structure is a hemisphere.

3. The multi-primary color powder-free LED color mixing primary lens according to claim 2, Features: The diameters of the hemispheres of the protruding structures vary.

4. The multi-primary color powder-free LED color mixing primary lens according to claim 1, Features: The lens body is a transparent optical silicone hemisphere.

5. The multi-primary color powder-free LED color mixing primary lens according to claim 1, Features: The light source and the lens body are arranged into an integrated structure through a molding process.

6. The multi-primary color powder-free LED color mixing primary lens according to claim 1, Features: The bottom plane of the lens body is coated with a light-shielding coating.

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