Projection lamp

Abstract

A projection lamp comprises a light source, a reflector and a shell, and the light source and the reflector are both contained in the shell. The shell comprises a bottom plate and a side wall arranged around the bottom plate, and a light outlet right facing the bottom plate is formed in one end of the side wall. The light source is arranged on the side wall and is used for emitting light; the reflector is arranged on the bottom plate and used for reflecting light rays emitted by the light source, so that the light rays are emitted from the light outlet in the direction parallel to the side wall.

Description

Technical Field

[0001] This utility model relates to the field of lighting equipment technology, and in particular to a projection lamp. Background Technology

[0002] In the field of lighting technology, the importance of floodlights is self-evident. Their performance directly affects lighting effects and image quality, playing a crucial role in enhancing environmental aesthetics, improving visual experience, and meeting specific functional requirements. However, traditional floodlights, such as vehicle headlights and searchlights, while meeting basic lighting needs to a certain extent, often have relatively simple designs, relying mainly on reflective surfaces to guide and project light. This leads to several shortcomings in key aspects such as light control, light spot distribution, and reflection efficiency: First, the light-emitting surface is usually set parallel to the optical axis, resulting in the light not being fully and effectively utilized during reflection. Some light may deviate from the intended projection direction during reflection, or even escape directly from the device, wasting light energy and potentially causing unnecessary interference to the surrounding environment. Second, due to the unreasonable design of the reflective surface, shadows are easily generated during projection. The presence of shadows severely affects the lighting effect, making it difficult to clearly present the outlines and details of the illuminated objects. In situations requiring high-definition lighting, such as operating rooms and precision machining workshops, this shadow phenomenon is particularly fatal, potentially interfering with the operation of medical personnel or causing processing errors.

[0003] Therefore, providing a highly efficient and uniform projection lamp is an urgent problem to be solved. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a projection lamp that achieves efficient light reflection and precise control through the combination of a reflector and a housing, as well as the application of a reflective coating.

[0005] The objective of this utility model is achieved through the following solution:

[0006] A projection lamp includes a light source, a reflector, and a housing, wherein the light source and the reflector are both housed in the housing; the housing includes a base plate and a side wall surrounding the base plate, one end of the side wall forming a light outlet facing the base plate; the light source is disposed on the side wall for emitting light; the reflector is disposed on the base plate for reflecting the light emitted by the light source, so that the light is emitted from the light outlet in a direction parallel to the side wall.

[0007] Furthermore, the inner surface of the sidewall is provided with at least two opposing light source surfaces, and the light source is disposed on the light source surface.

[0008] Furthermore, the light source includes a plurality of LEDs uniformly distributed on the surface of the light source.

[0009] Furthermore, the reflector has a reflective surface facing the light outlet, the reflective surface being used to reflect the light emitted by the light source.

[0010] Furthermore, the reflective surface is coated with a primary reflective coating with a reflectivity greater than 90%.

[0011] Furthermore, the shape of the reflecting surface can be any one of a sphere, an ellipsoid, or a parabola.

[0012] Furthermore, at least a portion of the reflective surface has an aspherical curvature.

[0013] Furthermore, the light emission direction of the light source forms an angle of 30-60 degrees with the sidewall.

[0014] Furthermore, the inner surface of the sidewall is provided with at least two oppositely arranged connecting surfaces, with the light source surface and the connecting surfaces arranged alternately.

[0015] Furthermore, the connecting surface is coated with a sub-reflective coating with a reflectivity greater than 90%.

[0016] The advantage of this invention lies in its ingenious combination of a reflector, a housing, and a light source, forming a highly efficient and compact projector. The primary reflective coating on the reflector and the secondary reflective coating on the inner surface of the housing work together to greatly improve the light reflection efficiency, allowing the light to be distributed more evenly after reflection, achieving a shadowless illumination effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a projection lamp provided for an embodiment of this application.

[0018] Figure 2 for Figure 1 The diagram shows the working optical path of the projector. Detailed Implementation

[0019] This invention provides a projector lamp applicable to the medical field. The projector lamp's efficient light reflection ensures uniform light distribution and shadowless illumination, which is crucial for medical surgeries and examinations. During surgery, doctors require a clear, shadow-free field of vision to ensure the precision and safety of their procedures. The projector lamp provides ample and uniform light, reducing shadows on the surgical site and enabling doctors to make more accurate judgments and perform procedures.

[0020] See Figure 1A preferred embodiment of this utility model provides a projector, including a light source 10, a reflector 20, and a housing 30. The light source 10 and the reflector 20 are both housed within the housing 30. The housing 30 includes a base plate 31 and multiple sidewalls 32 surrounding the base plate. The projector is suitable for various applications, such as lighting in medical and cultural facilities. In this case, the housing 30 can be connected to a fixed bracket or mounting surface according to existing technology, eliminating the need to adjust the lighting angle and ensuring clearer illumination of the facilities. It can also be used for lighting in exhibitions and performances. In this case, the housing 30 can be mounted on a movable bracket that can rotate horizontally or vertically according to existing technology, allowing for easy adjustment of the lighting angle and achieving a more dazzling visual effect. In the design of the projector, when connection to a power supply, control module, or other external devices is required, an electrical connection structure can be provided. In situations where frequent changes or adjustments to the projector's position are required, a plug-in electrical connection structure is typically used. A plug-in electrical connection structure usually consists of a plug and a socket. The plug is fixed to the projector housing, and the socket is connected to the power cord or control system. Electrical connection between plugs and sockets is achieved through metal contacts with good conductivity, ensuring stable current transmission. For floodlights requiring long-term fixed installation, bolt-fixed electrical connection structures are typically used. These structures securely connect the floodlight to the power cord or control system using bolts. This type of structure usually includes components such as conductive plates and bolts; the conductive plates have good conductivity, while the bolts are used for fixing the connection.

[0021] The base plate 31 is polygonal in shape, preferably rectangular or square in this embodiment. Correspondingly, the number of sidewalls 32 is preferably four, which are connected to the four edges of the base plate 31 by existing technologies such as welding or injection molding and are perpendicular to the base plate 31. Adjacent sidewalls 32 are also connected by existing technologies such as welding or injection molding, and adjacent sidewalls 32 are perpendicular to each other. The inner surfaces of two opposing sidewalls 32 are used as light source surfaces 321, and the inner surfaces of the other two opposing sidewalls 32 are used as connecting surfaces 322.

[0022] See also Figure 2The reflector 20 is disposed on the base plate 31. Preferably, the reflector 20 is a concave metal reflector. It is fixed to the base plate 31 with screws through pre-drilled threaded holes, or a snap-fit ​​structure is designed on the base plate 31, allowing the reflector 20 to be fixed to the base plate 31 via snap-fit. The reflector 20 reflects the light emitted by the light source 10, causing the light to exit from the light outlet 40 in a direction parallel to the sidewall. The reflector 20 has a reflective surface 21 facing the light outlet 40. The reflective surface 21 is coated with a primary reflective coating with a reflectivity greater than 90%. The reflective surface 21 reflects the light emitted by the light source 10. The reflective surface 21 can be any shape of a sphere, ellipsoid, or parabola, enabling it to concentrate and uniformly reflect the light emitted by the light source 10 to the light outlet 40, ensuring uniform light distribution and a wide illumination range. Different reflective surface shapes are selected based on the scene. Spherical reflective surfaces provide a relatively uniform light distribution and are suitable for scenes requiring broad illumination. Ellipsoidal reflective surfaces have the characteristic of focusing light, concentrating it within a specific area. Parabolic reflective surfaces also have the function of focusing light, but their focusing effect is stronger, projecting light almost perfectly parallel. At least a portion of the reflective surface 21 has aspherical curvature, allowing for more flexible adjustment of the light reflection path and angle, ensuring high uniformity and consistency of light during projection.

[0023] The light source 10 includes two sets of light-emitting units 11. Preferably, each set of light-emitting units 11 includes a matrix of multiple LEDs, which are respectively disposed on the two light source surfaces 321 for emitting light. The light emission direction of the light source 10 forms an angle of 30-60 degrees with the sidewall. The sidewall is a prism-shaped structure with its axis passing through the center of the prism, serving as a reference line to define the angular range of the light emission direction of the light source 10. This effectively controls the distribution of light, allowing the light source 10 to uniformly illuminate within the 30-60 degree range.

[0024] According to the above structural design, the two light source surfaces 321 correspond to each other, forming a relatively balanced light source layout, providing a more stable and uniform foundation for light projection. The light source 10 is disposed on the light source surface 321. By precisely controlling the number, layout, and power of the LEDs, the projection intensity and distribution range of the light can be further fine-tuned to meet the lighting needs of different scenarios. For example, in industrial environments requiring high-brightness lighting, the power and density of the LEDs can be increased to provide sufficient illumination; while in residential or commercial environments requiring soft light, the power of the LEDs can be reduced to create a comfortable lighting atmosphere. In addition, the high energy efficiency of LEDs gives this design a significant advantage in energy saving, which can greatly reduce energy consumption and conforms to the concept of modern green lighting.

[0025] The light source surface 321 and the connecting surface 322 are alternately arranged. The connecting surface 322 is coated with a sub-reflective coating with a reflectivity greater than 90%. The reflective function of the connecting surface 322 further improves the utilization efficiency of light. The sub-reflective coating on the connecting surface 322 compensates for areas outside the direct illumination range of the light source, ensuring that the light can cover a wider range and reduce lighting dead zones. It further reflects and guides the light, allowing the light to be projected more concentratedly onto the target area, improving the brightness and uniformity of the illumination. This design not only optimizes the layout and illumination effect of the light source 10 but also improves the stability and durability of the overall structure.

[0026] The projector provided by this utility model combines a reflector 20, a housing 30, and a light source 10 to form a highly efficient and compact projector. The primary reflective coating on the reflector 20 and the secondary reflective coating on the inner surface of the housing 30 work together to greatly improve the light reflection efficiency, allowing the light to be distributed more evenly after reflection, thus achieving a shadowless illumination effect.

Claims

1. A projection lamp, characterized in that, The application relates to a light source, a reflector and a shell, wherein the light source and the reflector are contained in the shell; the shell comprises a bottom plate and a side wall arranged around the bottom plate, and one end of the side wall forms a light outlet opposite to the bottom plate; The light source is arranged on the side wall and used for emitting light; the reflector is arranged on the bottom plate and used for reflecting the light emitted by the light source so that the light is emitted from the light outlet along a direction parallel to the side wall.

2. The projection lamp of claim 1, wherein An inner side surface of the side wall is provided with at least two oppositely arranged light source surfaces, and the light source is arranged on the light source surfaces.

3. The projection lamp of claim 2, wherein The light source comprises a plurality of LEDs uniformly distributed on the light source surfaces.

4. The projection lamp of claim 1, wherein The reflector has a reflecting surface facing the light outlet, and the reflecting surface is used for reflecting the light emitted by the light source.

5. The projection lamp of claim 4, wherein The reflecting surface is coated with a main reflecting coating layer with a reflectivity greater than 90%.

6. The projection lamp of claim 4, wherein The reflecting surface is in any one of a spherical surface, an ellipsoidal surface and a parabolic surface.

7. The projection lamp of claim 4, wherein At least a part of the reflecting surface has an aspheric curvature.

8. The projection lamp of claim 1, wherein The light emitting direction of the light source forms an included angle of 30-60 degrees with the side wall.

9. The projection lamp of claim 2, wherein, The inner side surface of the side wall is further provided with at least two oppositely arranged connecting surfaces, and the light source surfaces and the connecting surfaces are alternately arranged.

10. The projection lamp of claim 9, wherein The connecting surfaces are coated with a secondary reflecting coating layer with a reflectivity greater than 90%.

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