A ring light for small desktop electronic devices

Abstract

This utility model relates to the field of lighting technology, and in particular to a ring light for small desktop electronic devices. Currently, ring lights for small desktop electronic devices suffer from high cost or uneven lighting effects. This utility model provides a ring light for small desktop electronic devices, including a back plate, a light guide plate, and a light shield. The back plate consists of a reinforcing plate and a flexible circuit board. The light guide plate is mounted on the flexible circuit board, and LEDs are located on both sides of the light guide plate and electrically connected to the flexible circuit board. The light shield has a centrally located annular through-hole. This ring light is not only inexpensive but also provides a uniform lighting effect.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a ring light for small desktop electronic devices. Background Technology

[0002] In daily life, people often place electronic products such as speakers, clocks, thermometers, smart screens, and charging devices on their desktops. To enhance aesthetics or highlight certain areas, these products often feature ring lights on their outer surfaces. Currently, there are two main types of ring lights: LED screens and ring light strips with integrated LED chips. While LED screens are expensive, ring lights with integrated LED chips, though inexpensive, suffer from uneven lighting due to gaps between the chips. Therefore, a ring light structure that is both inexpensive and produces uniform lighting for small desktop electronic devices is needed. Utility Model Content

[0003] Therefore, it is necessary to address the above-mentioned shortcomings by providing a ring light for small desktop electronic devices, comprising: a back plate, the back plate including a reinforcing plate and a flexible circuit board disposed on the reinforcing plate, the flexible circuit board having a light guide plate and a plurality of LEDs, the LEDs being evenly disposed on both sides of the light guide plate and electrically connected to the flexible circuit board, the light guide plate and the LEDs being covered with a light shield with annular through holes on the surface, when turned on, the LEDs emit light, and the light is guided by the light guide plate to shine out from the annular through holes of the light shield, presenting a uniform ring light effect.

[0004] Preferably, the annular through hole is located at the exact center of the light-shielding sheet.

[0005] Preferably, a light-diffusing sheet with adhesive backing is sandwiched between the light guide plate and the light shield, and the light-diffusing sheet is attached to the light guide plate to make the light more uniform.

[0006] Preferably, a reflective paper with adhesive backing is sandwiched between the flexible circuit board and the light guide plate. The reflective paper is attached to the flexible circuit board and can reflect the light scattered backward by the light guide plate, thereby increasing the brightness of the light.

[0007] Preferably, the reflective paper, light guide plate, and light diffuser have grooves on both sides that match the LED beads, and the LED beads are placed in the grooves.

[0008] Preferably, a protrusion is provided on the bottom of the back plate and the flexible circuit board, the protrusion being used for installation in a matching slot in the electronic device.

[0009] The aforementioned ring light for small desktop electronic devices integrates the light from both sides of the LEDs through a light guide plate, shapes it with a light shield, sets a light diffuser for secondary scattering of light, uses reflective paper to reflect backscattered light, creates grooves for embedded installation of LEDs, geometrically adapts the protrusions and slots, and adopts cost-effective materials and modular design. This achieves improved uniformity of the ring light, increased light energy utilization, reduced structural thickness, improved installation efficiency, and reduced cost, thereby improving the luminous efficacy, space utilization, installation reliability, and product cost-effectiveness of the ring light. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of a ring light for a small desktop electronic device according to one embodiment of the present invention;

[0011] Figure 2 for Figure 1 A three-dimensional structural schematic diagram of the ring light for a small desktop electronic device from another perspective in the illustrated embodiment;

[0012] Figure 3 This is a front view of a ring light for a small desktop electronic device according to one embodiment of the present invention.

[0013] Explanation of reference numerals in the attached diagram: 100-backplate, 110-reinforcing plate, 120-flexible circuit board, 121-LED bead, 130-bump, 200-light guide plate, 300-light shield, 300a-annular through hole, 400-light diffuser, 500-reflective paper. Detailed Implementation

[0014] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0015] This utility model discloses a ring light for small desktop electronic devices, such as... Figures 1-3As shown, it includes: a back plate 100, a light guide plate 200, and a light shield 300. The back plate 100 consists of two parts: a reinforcing plate 110 that provides support, and a flexible circuit board (FPC) 120. The light guide plate 200 is disposed on the flexible circuit board 120. LED beads 121 are disposed on both sides of the light guide plate 200 and also on the flexible circuit board 120. The LED beads 121 are electrically connected to the flexible circuit board 120 and are powered and controlled by the flexible circuit board 120 to emit initial light. The material of the light guide plate 200 can be selected from: optical grade acrylic, polycarbonate, glass, silicone, and composite materials (such as coated acrylic, coated glass, etc.). The light guide plate 200 is used to guide the propagation of light. The light guide plate 200 and the LED beads 121 are covered with a light shield 300. The light shield 300 has an annular through hole 300a cut by laser engraving or stamping. The working principle of the ring light for small desktop electronic devices provided by this utility model is as follows: After the flexible circuit board 120 is connected to an external power source, it supplies power to the LED beads 121 on both sides. The LED beads 121 convert electrical energy into light energy and emit initial light. The LED beads 121 are located on both sides of the light guide plate 200. After emitting light, the light enters the light guide plate 200. The light guide plate 200 collects the light from the LED beads 121 on both sides and distributes it evenly across the entire plate surface through the internal reflection and refraction principle. The light shield 300 covering the surface of the light guide plate 200 has an annular through hole 300a. The non-through hole areas block stray light, allowing only light to emerge from the annular through hole 300a. At this time, the evenly distributed light forms an annular light spot in the target area after passing through the annular through hole 300a, achieving the ring light effect.

[0016] This utility model provides a ring light for small desktop electronic devices. The light from the LED beads 121 on both sides is integrated by the light guide plate 200 and shaped through the annular through-hole 300a of the light shield 300. It has advantages in terms of cost and uniformity of ring light: the light guide plate 200 is made of cost-effective materials such as acrylic, combined with the modular design of the flexible circuit board 120 and the reinforcing plate 110, which reduces material and processing costs. At the same time, the light distribution of the LED beads 121 on both sides, together with the optical transmission of the light guide plate 200, improves the light uniformity to more than 90%. The light shield 300 can also accurately control the light shape and reduce stray light interference. The product has the advantages of low cost and high uniform light efficiency.

[0017] In one embodiment, such as Figures 1-3 As shown, an annular through hole 300a is opened in the center of the light shield 300. The annular through hole 300a is located in the center so that the light emitted by the lamp beads 121 on both sides of the light guide plate 200 is conducted through the light guide plate 200 and emitted from the annular through hole 300a to form a symmetrical light field with the central axis as the reference. This ensures that the light propagation path in all directions is consistent and avoids uneven light intensity distribution caused by the offset of the through hole.

[0018] In one embodiment, such as Figure 1 , Figure 2 As shown, a light-diffusing sheet 400 with adhesive backing is sandwiched between the light guide plate 200 and the light shield 300. The light-diffusing sheet 400 is adhered to the light guide plate 200. The materials used for the light-diffusing sheet 400 include polyester, polycarbonate, silicone, and composite materials. The scattering degree of the light-diffusing sheet is increased by adjusting the haze of the material. After the light emitted by the LED 121 is initially homogenized by the light guide plate 200, when it passes through the light-diffusing sheet 400, the microstructures (such as microprisms and scattering particles) on the surface of the light-diffusing sheet 400 will refract and scatter the light a second time, further dispersing and redistributing the surface light source led out by the light guide plate 200, eliminating residual light spot brightness differences, and finally forming a more uniform annular light field when emitted from the annular through-hole 300a of the light shield 300. The adhesive backing design ensures that the light-diffusing sheet 400 and the light guide plate 200 are tightly bonded, avoiding light reflection loss caused by air gaps and ensuring optical transmission efficiency.

[0019] In one embodiment, such as Figure 1 , Figure 2 As shown, a reflective paper 500 with adhesive backing is sandwiched between the flexible circuit board 120 and the light guide plate 200, and is adhered to the flexible circuit board 120. During the light transmission process, some light rays are scattered towards the back plate 100, accounting for approximately 10%-20% of the total light. The reflective paper 500 (usually a high-reflectivity PET film or aluminum foil with a reflectivity ≥95%) reflects this scattering light back into the light guide plate 200. After secondary transmission through the light guide plate 200, the reflected light is emitted from the annular through-hole 300a, reducing light energy loss. The adhesive backing design also ensures that the reflective paper 500 is tightly bonded to the flexible circuit board 120, avoiding diffuse reflection loss caused by air gaps. In this embodiment, the reflective paper 500 achieves a dual improvement in light energy utilization and light efficiency without significantly increasing costs.

[0020] In one embodiment, such as Figure 1 , Figure 2 As shown, the reflective paper 500, light guide plate 200, and light diffuser 400 have grooves on both sides that match the LED beads 121, with the LED beads 121 fitting snugly within these grooves. The grooves provide mechanical positioning, effectively reducing misalignment of the reflective paper 500, light guide plate 200, and light diffuser 400 during standardized production, thus ensuring the ring light's presentation effect. Furthermore, the grooves make the overall structure of the ring light more compact, further reducing its overall size while maintaining luminous efficiency.

[0021] In one embodiment, such as Figures 1-3As shown, a protrusion 130 is provided on the bottom of the backplate 100 and the flexible circuit board 120. The protrusion 130 is used for installation in a matching slot in the electronic device. The geometric fit between the protrusion 130 and the electronic device slot enables quick locking, tool-free installation, saving assembly time, occupying less space, facilitating disassembly and maintenance, reducing after-sales costs, and improving installation reliability and vibration resistance.

[0022] The aforementioned ring light for small desktop electronic devices integrates the light from both sides of the LEDs through a light guide plate, shapes it with a light shield, sets a light diffuser for secondary scattering of light, uses reflective paper to reflect backscattered light, creates grooves for embedded installation of LEDs, geometrically adapts the protrusions and slots, and adopts cost-effective materials and modular design. This achieves improved uniformity of the ring light, increased light energy utilization, reduced structural thickness, improved installation efficiency, and reduced cost, thereby improving the luminous efficacy, space utilization, installation reliability, and product cost-effectiveness of the ring light.

[0023] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0024] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A ring light for small desktop electronic devices, characterized in that, include: The back plate (100) includes a reinforcing plate (110) and a flexible circuit board (120) disposed on the reinforcing plate (110). The flexible circuit board (120) is provided with a light guide plate (200) and a number of lamp beads (121). The lamp beads (121) are evenly disposed on both sides of the light guide plate (200) and electrically connected to the flexible circuit board (120). The light guide plate (200) and the lamp beads (121) are covered with a light shield (300) with an annular through hole (300a) on the surface. When turned on, the lamp beads (121) emit light, and the light is guided by the light guide plate (200) and emitted from the annular through hole (300a) of the light shield (300), presenting a uniform annular light effect.

2. The ring lamp according to claim 1, characterized in that, The annular through hole (300a) is located at the exact center of the light-shielding sheet (300).

3. The ring lamp according to claim 2, characterized in that, A light-diffusing sheet (400) with adhesive backing is sandwiched between the light guide plate (200) and the light shield (300). The light-diffusing sheet (400) is attached to the light guide plate (200) and makes the light more uniform.

4. The ring lamp according to claim 3, characterized in that, A reflective paper (500) with adhesive backing is sandwiched between the flexible circuit board (120) and the light guide plate (200). The reflective paper (500) is pasted on the flexible circuit board (120) and can reflect the light scattered backward by the light guide plate (200) to improve the light brightness.

5. The ring lamp according to claim 4, characterized in that, The reflective paper (500), light guide plate (200), and light diffuser (400) have grooves on both sides that match the lamp beads, and the lamp beads (121) are placed in the grooves.

6. The ring lamp according to claim 1, characterized in that, The back plate (100) and the flexible circuit board (120) have a protrusion (130) on their bottom, which is used to be installed in a matching slot in an electronic device.

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