Prism plate and lamp

Abstract

Provided in the present application are a prism plate and a lamp. The prism plate comprises a plate body, wherein the plate body comprises an incident surface and an emergent surface which are opposite to each other, a plurality of closely arranged first microstructures being provided on the incident surface, a plurality of closely arranged second microstructures being provided on the emergent surface, and the first microstructures and the second microstructures being arranged in a staggered manner in a direction perpendicular to the plate body. The first microstructures and the second microstructures can enable light to be scattered and mixed when passing through the plate body, and the arrangement of the first microstructures and the second microstructures in a staggered manner in the direction perpendicular to the plate body reduces the reflection loss of the light, improving the light transmittance, so that blue light can be further filtered, thereby achieving the effect of reducing the blue light, and reducing damage to visual acuity.

Description

Prism panels and lamps

[0001] This application claims priority to a Chinese patent application filed on March 13, 2024, with application number 202420489724.6 and invention name “Prism Plate and Lamp”. Part of the contents of this patent application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of lighting, and in particular to a prism plate and a lamp. Background Art

[0003] With the development of technology and electronic products, people's visual fatigue has increased significantly. Therefore, it is very important to ensure good comfort and optical effects when studying, working, reading and other focused activities under the lighting environment provided by the desk lamp.

[0004] Having better illumination uniformity and reducing blue light are important factors in reducing visual fatigue and protecting the structure of the eyeball. Currently, most desk lamps on the market improve the eye protection effect by adjusting the spectrum of the lamp beads in the light source or adding a prism plate with a single-sided structure. Adjusting the spectrum of the lamp beads in the light source will increase the manufacturing cost of the desk lamp. If better illumination uniformity and blue light reduction are required at the same time, the prism plate and lens must be coordinated, which makes the assembly more complicated and the final eye protection effect less than ideal.

[0005] In view of this, it is indeed necessary to provide a prism plate and a lamp to solve the above problems. Summary of the Invention

[0006] The purpose of the present application is to provide a prism plate with a double-sided microstructure.

[0007] To achieve the above-mentioned objectives, the present application provides a prism plate for use in lamps, wherein the prism plate includes a plate body, the plate body includes a relative incident surface and an exit surface, the incident surface is provided with a plurality of closely arranged first microstructures, and the exit surface is provided with a plurality of closely arranged second microstructures, and in a direction perpendicular to the plate body, the first microstructures and the second microstructures are staggered.

[0008] Optionally, the first microstructure includes a first end connected to the incident surface and a free end away from the incident surface, the first end is generally square, and the distance between the first end and the free end in a direction perpendicular to the plate body is a first height, and the ratio of the side length of the first end to the first height is 1 to 2.72.

[0009] Optionally, the first microstructure includes a side wall extending from the first end to the free end, the side wall includes a side edge and a side surface, the side edge and the side surface are staggered, the side edge is higher than the side surface, and the cross section of the side edge is a curved surface.

[0010] Optionally, the first ends of any two adjacent first microstructures have a common edge, and the first heights of the first microstructures are equal.

[0011] Optionally, the first microstructure is in the shape of a quadrangular pyramid.

[0012] Optionally, the second microstructure includes a beaded surface protruding from the emission surface toward a direction away from the emission surface.

[0013] Optionally, a ratio of a maximum distance between the bead surface and the exit surface to a radius of the bead surface is less than or equal to 1.

[0014] Optionally, any two adjacent second microstructures have a common edge, and a plurality of second microstructures are arranged in pairs overlapping on the emission surface and have a honeycomb shape.

[0015] Optionally, the plate body further includes a frame arranged around the incident surface and the exit surface, and the frame is provided with a mounting groove for assembling with the lamp.

[0016] Another object of the present application is to provide a lamp including the above-mentioned prism plate.

[0017] To achieve the above objectives, the present application provides a lamp, comprising the above prism plate.

[0018] The beneficial effects of this application are as follows: the first and second microstructures can scatter and mix light as it passes through the plate. The first microstructure is configured to expand the light's emission angle, thereby increasing the lamp's coverage and improving illumination uniformity, while the second microstructure is configured to mix the light and achieve uniform illumination. Furthermore, the first and second microstructures are staggered in a direction perpendicular to the plate, reducing light reflection losses and improving light transmittance. Furthermore, they can further filter out blue light, achieving a blue light reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a three-dimensional structural diagram of a prism plate according to a preferred embodiment of the present application.

[0020] FIG2 is a partial enlarged view of the prism plate shown in FIG1.

[0021] FIG3 is an enlarged view of the circled portion in FIG2 .

[0022] FIG4 is a plan view of the incident surface of the prism plate shown in FIG1.

[0023] FIG5 is a partially enlarged view of FIG4 .

[0024] FIG6 is an enlarged view of the circled portion in FIG5 .

[0025] FIG. 7 is a plan view of the exit surface of the prism plate shown in FIG. 1 .

[0026] FIG8 is a partially enlarged view of FIG7 .

[0027] FIG. 9 is a side view of the prism plate shown in FIG. 1 .

[0028] Explanation of the accompanying reference numerals: 100 - prism plate; 110 - plate body, 120 - incident surface, 130 - first microstructure, 131 - first end, 132 - free end, 133 - side wall, 134 - side edge, 135 - side surface, 140 - exit surface, 150 - second microstructure, 152 - bead surface, 160 - frame, 161 - mounting groove. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of this application clearer, this application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] It should be noted here that in order to avoid obscuring the present application due to unnecessary details, only the structures and / or processing steps closely related to the scheme of the present application are shown in the accompanying drawings, while other details that are not closely related to the present application are omitted.

[0031] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0032] Please refer to Figures 1 to 9, which show a prism plate 100 of a preferred embodiment of the present application. The prism plate 100 is used in a lamp. The prism plate 100 includes a plate body 110, and the plate body 110 includes an incident surface 120 and an exit surface 140 relative to each other. A plurality of closely arranged first microstructures 130 are provided on the incident surface 120. At the same time, a plurality of closely arranged second microstructures 150 are provided on the exit surface 140. In a direction perpendicular to the plate body 110, the first microstructures 130 and the second microstructures 150 are staggered. Light emitted by the light source of the lamp enters the prism plate 100 from the first microstructures 130 and is emitted from the prism plate 100 from the second microstructures 150.

[0033] The prism plate 100 of the present application combines the first microstructure 130 and the second microstructure 150, making it easier to install the prism plate 100 in a lamp. Furthermore, the first microstructure 130 and the second microstructure 150 can scatter and mix light as it passes through the plate 110. The first microstructure 130 is configured to expand the light's angle of emission to increase the lamp's coverage and improve illumination uniformity, while the second microstructure 150 is configured to mix the light and achieve uniform light distribution. Furthermore, the first microstructure 130 and the second microstructure 150 are staggered in a direction perpendicular to the plate 110, reducing light reflection losses and improving light transmittance. Furthermore, they can further filter blue light, achieving a blue light reduction effect.

[0034] 2 to 6 , in this embodiment, the first microstructure 130 includes a first end 131 connected to the incident surface 120 and a free end 132 away from the incident surface 120. The first end 131 is generally square, that is, the first microstructure 130 is in the shape of a quadrangular truncated pyramid or a quadrangular pyramid. In a direction perpendicular to the plate 110, the distance between the first end 131 and the free end 132 is a first height. The ratio of the side length of the first end 131 to the first height is 1 to 2.72. When the ratio of the side length of the first end 131 to the first height is within this range, the first microstructures 130 are arranged more densely on the incident surface 120, which can reduce the leakage of light emitted by the light source of the lamp directly from between the first microstructures 130, thereby ensuring a higher diffusion effect.

[0035] It should be noted that the first end 131 is substantially square, the side of the first end 131 in the width direction of the plate 110 is a straight line, and the side length of the first end 131 is based on the side length of the side in the width direction of the plate 110.

[0036] Preferably, the ratio of the side length of the first end 131 to the first height is 1.16, in which case the light diffusion effect is better.

[0037] In this embodiment, the first microstructure 130 includes a sidewall 133 extending from a first end 131 to a free end 132. The sidewall 133 includes alternating side edges 134 and side surfaces 135. The side edges 134 are higher than the side surfaces 135, and the cross-section of the side edges 134 is a curved surface. The higher side edges 134 than the side surfaces 135 and the curved cross-section of the side edges 134 increase the stability and durability of the first microstructure 130. The curved cross-section of the side edges 134 near the free end 132, compared to conventional designs where the cross-section of the side edges 134 near the free end 132 is straight, reduces manufacturing difficulty, improves product yield, and has little impact on the light efficiency of the first microstructure 130.

[0038] In some other embodiments, the end of the side edge 134 close to the first end 131 may also be configured as a curve to further reduce the difficulty of manufacturing the prism plate 100 , and this application does not impose any limitation on this.

[0039] In this embodiment, the first ends 131 of any two adjacent first microstructures 130 have a common edge, that is, the first microstructures 130 are continuously arranged on the incident surface 120, and the first heights of the first microstructures 130 are equal, leaving no gaps between them, thereby preventing light from directly entering the prism plate 100 from between two adjacent optical microstructures, thereby ensuring better diffusion and light mixing effects.

[0040] 7 to 9 , in this embodiment, the second microstructure 150 located on the exit surface 140 of the plate 110 includes a beaded surface 152 protruding from the exit surface 140 away from the exit surface 140. The protruding beaded surface 152 can further scatter light. Due to the shape and surface properties of the beaded surface 152, the light is further scattered in various directions after passing through the beaded surface 152, thereby achieving better light mixing.

[0041] In this embodiment, the beaded surfaces 152 are arranged in pairs on the emission surface 140 to prevent light from being directly emitted from the plate 110 without being refracted by the beaded surfaces 152. At the same time, the ratio of the maximum distance between the beaded surfaces 152 and the emission surface 140 to the outer radius of the beaded surfaces 152 is less than or equal to 1. This ensures that light is sufficiently refracted when passing through the beaded surfaces 152, thereby changing the propagation direction of the light and achieving the effect of light mixing and uniform distribution.

[0042] Preferably, the ratio of the maximum distance between the bead surface 152 and the emission surface 140 to the radius of the bead surface 152 is 0.86. In this case, the second microstructure 150 on the emission surface 140 has the best light mixing effect on the light.

[0043] In this embodiment, there is a common edge between the second ends of any two adjacent second microstructures 150, and the second microstructures 150 are arranged in pairs on the exit surface 140 and have a honeycomb shape. The honeycomb structure has a unique geometric shape, and its surface is composed of a plurality of second microstructures 150. When light is incident on the honeycomb structure, each second microstructure 150 acts as a scattering center, scattering the light in different directions. This scattering and diffusion effect enables the light to be more evenly distributed in space, thereby achieving a mixed light effect, and the light will undergo multiple reflections and refractions when interacting with it. At the same time, these reflection and refraction processes cause the light to undergo multiple path changes within or between the second microstructures 150, further enhancing the mixing and uniform distribution of the light, so as to achieve sufficient light mixing and ultimately present a better light output effect.

[0044] The lamp further includes a housing and a light source assembly. The light source assembly and the prism plate 100 are both installed in the housing.

[0045] In this embodiment, the plate body 110 further includes a frame 160 arranged around the incident surface 120 and the exit surface 140. The frame 160 is provided with a mounting groove 161, and the mounting groove 161 is configured to be assembled with the lamp. Specifically, the prism plate 100 is assembled and connected to the shell through the mounting groove 161, and the installation is convenient and quick.

[0046] In summary, the prism plate 100 of the present application combines the first microstructure 130 and the second microstructure 150, making it easier to install the prism plate 100 in the lamp. At the same time, the first microstructure 130 and the second microstructure 150 can cause light to scatter and mix when passing through the plate body 110. The first microstructure 130 is configured to expand the light emission angle to increase the coverage of the lamp and improve the uniformity of illumination, while the second microstructure 150 is configured to mix the light and achieve uniform light. In addition, in the direction perpendicular to the plate body 110, the first microstructure 130 and the second microstructure 150 are staggered to reduce the reflection loss of light and improve the transmittance of light. At the same time, it can further filter blue light to achieve the effect of reducing blue light.

[0047] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A prismatic plate, used in a lamp, wherein: The invention comprises a plate body (110), wherein the plate body (110) comprises an incident surface (120) and an exit surface (140) opposite to each other, wherein a plurality of closely arranged first microstructures (130) are provided on the incident surface (120), and a plurality of closely arranged second microstructures (150) are provided on the exit surface (140), and in a direction perpendicular to the plate body (110), the first microstructures (130) and the second microstructures (150) are arranged in a staggered manner.

2. The prism sheet according to claim 1, wherein The first microstructure (130) includes a first end (131) connected to the incident surface (120), and a free end (132) away from the incident surface (120), the first end (131) is generally square, and in a direction perpendicular to the plate (110), the distance between the first end (131) and the free end (132) is a first height, and the ratio of the side length of the first end (131) to the first height is 1 to 2.

72.

3. The prism sheet according to claim 2, wherein The first microstructure (130) includes a side wall (133) extending from the first end (131) to the free end (132), the side wall (133) including a side edge (134) and a side surface (135), the side edge (134) and the side surface (135) being arranged in an alternating manner, the side edge (134) being higher than the side surface (135), and the cross section of the side edge (134) being a curved surface.

4. The prism sheet according to claim 2, wherein The first ends (131) of any two adjacent first microstructures (130) have a common edge, and the first heights of the first microstructures (130) are equal.

5. The prism sheet according to claim 1, wherein The first microstructure (130) is in the shape of a quadrangular pyramid. The prism sheet according to claim 1 , wherein: The second microstructure (150) includes a bead surface (152) protruding from the emission surface (140) in a direction away from the emission surface (140).

7. The prism sheet according to claim 6, wherein The ratio of the maximum distance between the bead surface (152) and the exit surface (140) to the radius of the bead surface (152) is less than or equal to 1.

8. The prism sheet according to claim 1, wherein Any two adjacent second microstructures (150) have a common edge, and a plurality of second microstructures (150) are arranged in pairs on the emission surface (140) in an overlapping manner and in a honeycomb shape.

9. The prism sheet according to claim 1, wherein The plate body (110) further comprises a frame (160) arranged around the incident surface (120) and the exit surface (140), and the frame (160) is provided with a mounting groove (161) for assembling with the lamp.

10. A lamp, wherein: The prism plate comprises the prism plate according to any one of claims 1 to 9.

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