Light supplementing lampshade for mobile phone flash lamp

Abstract

The utility model discloses a light supplementing lampshade for a mobile phone flash lamp, and belongs to the technical field of mobile phone accessories. The back surface of the substrate is an inner surface, and the front surface of the substrate is an outer surface; the center of the outer surface is provided with a central plane; a Fresnel grain surface is annularly arranged on the periphery, located on the central plane, of the outer surface; the Fresnel pattern surface is composed of a plurality of light scattering stripes which are distributed along the radial direction of the central plane; the cross sections of the light scattering stripes are V-shaped, and the end parts, far away from the substrate, of the light scattering stripes are provided with outer fillets. According to the mode, the tooth depth, the tooth space and the R angle are reduced, so that the reflection and refraction loss of light can be minimized as much as possible on the premise of ensuring that the lampshade is easy to be subjected to injection molding, and the requirements of a mobile phone on the performance, the light weight and the thin weight are met.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile phone accessories, in particular to a fill light lampshade for a mobile phone flashlight. Background Art

[0002] A flash cover is a mobile phone accessory that is usually used on the flash portion of a mobile phone camera. Its main function is to enhance the effect of the flash, improve the light distribution when taking pictures, and obtain a more uniform lighting effect.

[0003] Chinese patent CN211741803U discloses a mobile phone flash cover based on three-dimensional stripe astigmatism, which includes a main body and an edge mounting portion, wherein the edge mounting portion is located on the periphery of the main body, and the outer surface of the main body is provided with a central convex portion and a plurality of astigmatism stripes, the astigmatism stripes are arc-shaped, the astigmatism stripes are concentrically arranged with the central convex portion, the cross-section of the astigmatism stripes is an inverted V-shape, and the top of the astigmatism stripes is provided with a semicircular surface; the height of the astigmatism stripes is 7 to 10 times the radius of the semicircular surface, but currently mobile phones are mainly developed in the direction of being lighter and thinner, and the thickness of the body directly affects the user experience. A lighter and thinner mobile phone is more convenient to carry, which requires the components inside the mobile phone to compress the space and thickness, and the thickness should be as small as possible while meeting the performance requirements.

[0004] Based on this, the utility model designs a fill light lampshade for a mobile phone flashlight to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a fill light lampshade for a mobile phone flashlight.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A fill light lampshade for a mobile phone flashlight, comprising a substrate;

[0008] The back surface of the substrate is the inner surface, and the front surface of the substrate is the outer surface;

[0009] A central plane is provided at the center of the outer surface; a Fresnel pattern surface is provided on the outer periphery of the central plane;

[0010] The Fresnel surface is composed of multiple scattered light fringes distributed radially along the central plane;

[0011] The cross section of the scattered light stripe is V-shaped, and the end of the scattered light stripe away from the substrate is provided with an outer rounded corner.

[0012] Furthermore, the substrate is configured to be a transparent material.

[0013] Furthermore, the multiple scattered light fringes constituting the Fresnel surface are concentric circles, and the radius thereof gradually increases.

[0014] Furthermore, the thickness of the substrate is 0.35 mm.

[0015] Furthermore, the radius of the outer corner is 0.012 mm.

[0016] Furthermore, the Fresnel surface presents a connected sawtooth structure in a cross-sectional view.

[0017] Furthermore, the tooth spacing of the sawtooth structure is 0.10 mm.

[0018] Furthermore, the tooth depth of the sawtooth structure is 0.110m.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The substrate is installed on the back shell of the mobile phone, and the flash is located on the inner surface of the substrate; the flash light enters from the inner surface of the substrate and is emitted from the outer surface of the substrate. When the light is emitted, it passes through the coordinated refraction of the central plane, multiple scattered light stripes and outer rounded corners, which effectively improves the heat dissipation effect of the light and improves the average uniformity and minimum uniformity of the flash light illumination.

[0020] 2. By reducing the tooth depth, tooth spacing and R angle, the reflection and refraction loss of light can be minimized while ensuring that the lampshade is easy to injection mold, thus meeting the performance and lightweight requirements of mobile phones. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0022] Figure 1 The utility model is a three-dimensional fill light cover for a mobile phone flashlight Figure 1 ;

[0023] Figure 2 This is a front view of a fill light cover for a mobile phone flashlight of the present utility model;

[0024] Figure 3 It is a cross-sectional view of the Fresnel pattern surface 3 of the present invention.

[0025] The numbers in the figure represent:

[0026] 1. Substrate; 11. Outer surface; 12. Inner surface; 2. Center plane; 3. Fresnel pattern; 4. Diffraction fringes; 5. Outer fillet. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in 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 some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0029] Example 1: In some embodiments, please refer to the accompanying drawings of the specification. Figure 1-Figure 3 , a fill light lamp cover for a mobile phone flash light, comprising a substrate 1;

[0030] The back surface of the substrate 1 is an inner surface 12, and the front surface of the substrate 1 is an outer surface 11;

[0031] A central plane 2 is provided at the center of the outer surface 11; a Fresnel pattern 3 is provided on the outer periphery of the outer surface 11 located at the central plane 2;

[0032] The Fresnel surface 3 is composed of a plurality of scattered light fringes 4 distributed radially along the central plane 2;

[0033] The cross section of the scattered light stripe 4 is V-shaped, and the end of the scattered light stripe 4 away from the substrate 1 is provided with an outer rounded corner 5.

[0034] In the present invention, a substrate 1 is mounted on the back shell of a mobile phone, and a flash is located on the inner surface 12 of the substrate 1; the flash light enters from the inner surface 12 of the substrate 1 and is emitted from the outer surface 11 of the substrate 1. When emitted, the light passes through the coordinated refraction of the central plane 2, multiple scattered light stripes 4 and their outer rounded corners 5, thereby effectively improving the heat dissipation effect of the light and improving the average uniformity and minimum uniformity of the flash light illumination.

[0035] Specifically, the substrate 1 is made of a transparent material, such as transparent glass.

[0036] Specifically, the multiple scattered light fringes 4 constituting the Fresnel surface 3 are concentric circles, and the radius thereof gradually increases.

[0037] Specifically, the thickness of the substrate 1 is 0.35 mm, thereby effectively meeting the current demand for mobile phones to be thinner and lighter.

[0038] Specifically, the radius of the outer fillet 5 is 0.012mm; the Fresnel surface 3 presents a connected sawtooth structure in a cross-sectional view, with a tooth pitch of 0.10mm and a tooth depth of 0.110m; by reducing the tooth depth, tooth pitch and R angle, the reflection and refraction losses of light are minimized as much as possible while ensuring that the lampshade is easy to injection mold, thereby meeting the performance requirements of the mobile phone.

[0039] When the fill light cover for the mobile phone flash is in use, under the adjustment of FOV: 85 degrees and center brightness meeting 75LUX, the uniformity of 0FOV is 25%.

[0040] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fill light cover for a mobile phone flashlight, comprising a substrate (1), characterized in that: The back surface of the substrate (1) is an inner surface (12), and the front surface of the substrate (1) is an outer surface (11); A central plane (2) is provided at the center of the outer surface (11); a Fresnel pattern surface (3) is provided on the outer periphery of the outer surface (11) located at the central plane (2); The Fresnel pattern surface (3) is composed of a plurality of scattered light fringes (4) distributed radially along the central plane (2); The cross section of the scattered light stripe (4) is V-shaped, and the end of the scattered light stripe (4) away from the substrate (1) is provided with an outer rounded corner (5).

2. The fill light cover for mobile phone flashlight according to claim 1, characterized in that: The substrate (1) is made of a transparent material.

3. The fill light cover for mobile phone flashlight according to claim 1, characterized in that: The plurality of scattered light fringes (4) constituting the Fresnel pattern surface (3) are concentric circles, and the radius thereof gradually increases.

4. The fill light cover for mobile phone flashlight according to claim 1, characterized in that: The thickness of the substrate (1) is 0.35 mm.

5. The fill light cover for mobile phone flashlight according to claim 1, characterized in that: The radius of the outer corner (5) is 0.012 mm.

6. The fill light cover for mobile phone flashlight according to claim 1, characterized in that: The Fresnel pattern surface (3) is a connected sawtooth structure in a cross-sectional view.

7. The fill light cover for mobile phone flashlight according to claim 6, characterized in that: The tooth spacing of the zigzag structure is 0.10 mm.

8. The fill light cover for mobile phone flashlight according to claim 7, characterized in that: The tooth depth of the sawtooth structure is 0.110m.

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