Diffusion plate, polarized light optical system, mirror cabinet lighting device and mirror cabinet

Abstract

The utility model relates to the technical field of mirror cabinet illumination, and discloses a diffusion plate, a polarized light optical system, a mirror cabinet illumination device and a mirror cabinet, the diffusion plate comprises a first incident plane and a first emergent plane, the first incident plane faces a light source of the polarized light optical system, the first incident plane is provided with a plurality of microprisms arranged along a first direction, and the first emergent plane is provided with a second incident plane. The micro prism comprises a first plane and a second plane, the first plane and the second plane are connected to form a wedge-shaped structure, the tip end of the wedge-shaped structure inclines towards a first direction, and the first direction is parallel to the light emitting surface of the polarized light optical system. Therefore, clear illumination can be provided for the middle part of the mirror cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of mirror cabinet lighting, in particular to a diffusion plate, a polarization optical system, a mirror cabinet lighting device and a mirror cabinet. Background Art

[0002] Currently, in order to make makeup conveniently and quickly, the bathroom is often used as a makeup place. The lights required for makeup are softer and more realistic, and often additional lights are equipped as auxiliary lighting. Therefore, beauty lights are usually equipped on the mirror cabinets in the bathroom or bedroom. However, in order to avoid affecting the normal use of the mirror cabinet, these beauty lights are often arranged on the top, both sides or around the mirror cabinet.

[0003] At present, both the incident surface and the exit surface of the diffusion plate in the mirror cabinet lighting device are flat surfaces, so that the outgoing light diffuses uniformly forward. For a relatively large mirror cabinet, the distance between the lights installed on both sides is large. Since the irradiation directions or the main optical axis directions of these lights all face directly forward of the light exit surface, that is, the direction perpendicular to the light exit surface, it is difficult to irradiate in front of the mirror, which will cause a dark area on the face, unable to achieve the illuminance and authenticity required for makeup, and often there will be shadows on the face, and the face in the middle area of the mirror cabinet cannot be clearly illuminated comprehensively. Summary of the Utility Model

[0004] In view of this, the utility model provides a diffusion plate, a polarization optical system, a mirror cabinet lighting device and a mirror cabinet to solve or partially solve the technical problem that the lighting device on the existing mirror cabinet cannot clearly illuminate the human face.

[0005] The technical solution proposed by the utility model is as follows:

[0006] In the first aspect of the utility model, a diffusion plate is provided, which is applied to a polarization optical system. The diffusion plate includes a first incident surface and a first exit surface. The first incident surface faces the light source of the polarization optical system. The first incident surface is provided with a plurality of microprisms arranged along a first direction. The microprism includes a first plane and a second plane. The first plane and the second plane of the same microprism are connected to form a wedge-shaped structure. The tip of the wedge-shaped structure inclines towards the first direction, wherein the first direction is parallel to the light exit surface of the polarization optical system.

[0007] Optionally, the first plane is an optical surface and the second plane is a non-optical surface.

[0008] Optionally, the included angle between the first plane and the light exit surface and the included angle between the second plane and the light exit surface both decrease successively along the first direction.

[0009] Optionally, the included angle between the first plane of the first one arranged along the first direction and the light exit surface is:

[0010]

[0011] Wherein, θ1 is the angle between the first one of the first planes and the light-emitting surface, w1 is the horizontal distance between the light source and one end of the diffusion plate, n1 is the refractive index of the diffusion plate, and h is the vertical distance between the light source and the diffusion plate;

[0012] The angle between the last one of the first planes arranged in the first direction and the light-emitting surface is:

[0013]

[0014] Wherein, θ n is the angle between the last one of the first planes and the light-emitting surface, and w2 is the horizontal distance between the light source and the other end of the diffusion plate;

[0015] The decreasing angle of adjacent first planes is:

[0016]

[0017] Wherein, is the decreasing angle of the first plane, and n is the number of the microprisms;

[0018] The angle between the first one of the second planes arranged in the first direction and the light-emitting surface is:

[0019]

[0020] Wherein, β1 is the angle between the first one of the second planes and the light-emitting surface;

[0021] The angle between the last one of the second planes arranged in the first direction and the light-emitting surface is:

[0022]

[0023] Wherein, β n is the angle between the last one of the second planes and the light-emitting surface;

[0024] The decreasing angle of adjacent second planes is:

[0025]

[0026] Wherein, is the decreasing angle of the second plane.

[0027] Optionally, the second plane of the current microprism is connected to the first plane of the next microprism in the first direction.

[0028] Optionally, the first light-emitting surface is a plane.

[0029] Optionally, the material of the diffusion plate is optical plastic, and diffusion powder is uniformly provided in the optical plastic.

[0030] The second aspect of the present invention provides a polarized optical system, including a light source and the diffusion plate as described in the first aspect and any one of the first aspects of the present invention, and the first incident surface of the diffusion plate faces the light source.

[0031] The third aspect of the present invention provides a mirror cabinet lighting device, including the polarized optical system as described in the third aspect of the present invention.

[0032] The fourth aspect of the present invention provides a mirror cabinet, including the mirror cabinet lighting device as described in the third aspect of the present invention.

[0033] It can be seen from the above technical solutions that the present invention has the following advantages:

[0034] A diffusion plate, a polarized optical system, a mirror cabinet lighting device and a mirror cabinet provided by the present invention are provided. By providing a plurality of microprisms arranged along a first direction on the first incident surface of the diffusion plate, the microprism includes a first plane and a second plane, the first plane and the second plane are connected to form a wedge-shaped structure, and the tip of the wedge-shaped structure is inclined in the first direction. Using the principle of refraction of light, the light emitted by the light source is deflected in the first direction. And the mirror cabinet lighting device is usually arranged on the periphery of the mirror cabinet. When the diffusion plate is applied to the polarized optical system of the mirror cabinet lighting device, the light emitted by the light source located at the edge of the mirror cabinet can be irradiated towards the middle of the mirror cabinet and deflected towards the front of the mirror, which can provide clear lighting for the middle of the mirror cabinet and facilitate relevant personnel to use the mirror cabinet. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic structural diagram of the diffusion plate in the embodiment of the present invention;

[0037] Figure 2 It is a schematic structural diagram of a polarized optical system in the embodiment of the present invention;

[0038] Figure 3 For Figure 2 It is a schematic optical path diagram of the polarized optical system in

[0039] Figure 4 For Figure 3 It is a partial enlarged view of part A in

[0040] Figure 5 is Figure 3 Partial enlarged view of part B;

[0041] Figure 6 Optical path diagram when the included angle between adjacent microprisms in the embodiment of the present utility model decreases;

[0042] Figure 7 Optical path diagram when the included angle between adjacent microprisms in the embodiment of the present utility model remains unchanged;

[0043] Figure 8 Structural diagram of another polarization optical system in the embodiment of the present utility model;

[0044] Figure 9 is Figure 8 Optical path diagram of the polarization optical system;

[0045] Figure 10 Structural diagram of the mirror cabinet lighting device in the embodiment of the present utility model;

[0046] Figure 11 Structural diagram of the mirror cabinet in the embodiment of the present utility model.

[0047] Reference numerals:

[0048] 11 - First exit surface; 12 - First entrance surface; 121 - Microprism; 1211 - First plane; 1212 - Second plane; 2 - Light source board; 21 - Light source; 3 - Polarizing lens; 31 - Second exit surface; 32 - Second entrance surface; 41 - First reflector; 42 - Second reflector; 5 - Housing. Detailed implementation manners

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0050] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0051] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two components. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0052] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0053] A diffuser plate provided by an embodiment of the present utility model can be applied to the polarization optical system of a mirror cabinet in various scenarios such as bathrooms, toilets, bedrooms, etc., so that the emitted light is biased towards the front of the mirror, thereby meeting the lighting requirements of users when using the mirror cabinet for makeup, grooming, and other behaviors.

[0054] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, an embodiment of the present utility model provides a diffuser plate applied to a polarization optical system. The diffuser plate includes a first incident surface 12 and a first exit surface 11. The first incident surface 12 faces the light source 21 of the polarization optical system. The first incident surface 12 is provided with a plurality of microprisms 121 arranged along a first direction. The microprisms 121 include a first plane 1211 and a second plane 1212. The first plane 1211 and the second plane 1212 of the same microprism 121 are connected to form a wedge-shaped structure. The tip of the wedge-shaped structure is inclined towards the first direction, wherein the first direction is parallel to the light exit surface of the polarization optical system.

[0055] Specifically, the light source 21 of the polarization optical system can adopt various light-emitting devices, such as LED lamp beads, incandescent lamps, halogen lamps, etc.

[0056] In one example, the light source 21 adopts LED lamp beads. Correspondingly, the light source board 2 is an LED light source 21 board on which a plurality of LED lamp beads and electronic components are arranged.

[0057] There are multiple LED lamp beads with at least two colors. Specifically, the low color temperature of one type of LED lamp bead is ≤3000K, and the high color temperature of another type of LED lamp bead is ≥5000K. Two or more different color temperatures can achieve other color temperatures between the lowest and the highest color temperatures according to a certain brightness ratio, thus meeting the lighting color requirements in different environments. In addition, the color rendering index CRI of the LED lamp bead is >90Ra, and the high color rendering index can restore the true irradiation effect.

[0058] The diffusion plate is formed by an extrusion process, and its material is an optical plastic, including but not limited to polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), etc. A small amount of diffusion powder is added to the optical plastic, and the diffusion plate is evenly arranged in the optical plastic, so that the outgoing light undergoes diffuse scattering, achieving the effect of soft and non-glare light.

[0059] The first incident surface 12 of the diffusion plate is mainly composed of multiple wedge-shaped prisms. The multiple micro prisms 121 are arranged in the first direction to form a "tooth-like" light incident surface.

[0060] Specifically, each micro prism 121 includes a first plane 1211 and a second plane 1212. The distance between adjacent micro prisms 121 is equal. In the same micro prism 121, the second plane 1212 is located on the right side of the first plane 1211. By tilting the tip of the wedge-shaped structure of each micro prism 121 in the first direction, the incident light of the light source 21 can be irradiated onto the first plane 1211 as much as possible, and then the light is deflected in the first direction by using the refraction principle of light through the first plane 1211.

[0061] The first outgoing surface 11 of the diffusion plate is a plane. At this time, the first outgoing surface 11 of the diffusion plate is parallel to the outgoing surface of the polarization optical system, and the first direction is also parallel to the first outgoing surface 11.

[0062] The first direction is any direction parallel to the outgoing surface of the polarization optical system. For example, if the first direction is parallel to the outgoing surface and to the right, the outgoing light is deflected to the right, and the polarization optical system can be correspondingly arranged on the left side of the mirror cabinet to deflect the light towards the middle of the mirror.

[0063] A diffuser plate according to an embodiment of the present utility model is provided with a plurality of microprisms 121 arranged along a first direction on a first incident surface 12 of the diffuser plate. The microprisms 121 include a first plane 1211 and a second plane 1212. The first plane 1211 and the second plane 1212 are connected to form a wedge-shaped structure. The tip of the wedge-shaped structure is inclined in the first direction. By using the principle of light refraction, the light rays emitted by the light source 21 are deflected in the first direction. The mirror cabinet lighting device is usually arranged on the periphery of the mirror cabinet. When this diffuser plate is applied to the polarization optical system of the mirror cabinet lighting device, the light rays emitted by the light source 21 located at the edge of the mirror cabinet can be irradiated towards the middle of the mirror cabinet, biased towards the front of the mirror, and can provide clear lighting for the middle of the mirror cabinet, facilitating the relevant personnel to use the mirror cabinet.

[0064] The embodiment of the present utility model uses the diffuser plate for polarization, and only needs to perform simple structural adjustment on the basis of the existing diffuser plate. The structure is simple, which is beneficial to reducing the volume of the optical system and lowering the cost.

[0065] In some embodiments, the first plane 1211 is an optical surface, which mainly refracts the light rays emitted by the light source 21 and deflects them in the first direction. The second plane 1212 is a non-optical surface, which is mainly used to connect the first plane 1211 of the next microprism 121 along the first direction.

[0066] By distinguishing the functions of the first plane 1211 and the second plane 1212 in this way, as shown in [description of the figure], the incident light rays of the light source 21 can be made to irradiate the second plane 1212 as little as possible, and the light rays are all effectively deflected. At the same time, when the light rays irradiate the second plane 1212, as shown in [description of the figure], the light rays are deflected in the opposite direction of the first direction, that is, polarized in the negative direction of the X-axis, generating ineffective light rays. Figure 6 As shown, the incident light rays of the light source 21 can be made to irradiate the second plane 1212 as little as possible, and the light rays are all effectively deflected. At the same time, when the light rays irradiate the second plane 1212, as shown, the light rays are deflected in the opposite direction of the first direction, that is, polarized in the negative direction of the X-axis, generating ineffective light rays. Figure 7 As shown, the light rays are deflected in the opposite direction of the first direction, that is, polarized in the negative direction of the X-axis, generating ineffective light rays.

[0067] Furthermore, the included angle between the first plane 1211 and the light-emitting surface and the included angle between the second plane 1212 and the light-emitting surface both decrease sequentially along the first direction.

[0068] It should be understood that the included angle between the first plane 1211 and the light-emitting surface and the included angle between the second plane 1212 and the light-emitting surface are both interior angles of the triangle formed by the first plane 1211, the second plane 1212, and the light-emitting surface.

[0069] Specifically, for each microprism 121, the included angle between the first plane 1211 of the next microprism 121 along the first direction and the light-emitting surface and the included angle between the second plane 1212 and the light-emitting surface are both smaller than those of the previous microprism 121, and decrease sequentially.

[0070] By means that the angles between the first plane 1211 and the light-emitting surface and between the second plane 1212 and the light-emitting surface both decrease sequentially in the first direction, the purpose of using the first plane 1211 as the optical surface and the second plane 1212 as the non-optical surface is achieved, that is, light can be refracted out through the first plane 1211 and is not irradiated onto the second plane 1212 as much as possible.

[0071] Further, in one embodiment, the angle between the first first plane 1211 arranged in the first direction and the light-emitting surface, that is, the angle between the first plane 1211 of the first microprism 121 and the light-emitting surface is:

[0072]

[0073] In the formula, θ1 is the angle between the first first plane 1211 and the light-emitting surface, w1 is the horizontal distance between the light source 21 and one end of the diffusion plate, n0 is the refractive index of the diffusion plate, and h is the vertical distance between the light source 21 and the diffusion plate.

[0074] The angle between the last first plane 1211 arranged in the first direction and the light-emitting surface, that is, the angle between the first plane 1211 of the last microprism 121 and the light-emitting surface is:

[0075]

[0076] In the formula, θ n is the angle between the last first plane 1211 and the light-emitting surface, and w2 is the horizontal distance between the light source 21 and the other end of the diffusion plate. In one example, w1 is the horizontal distance between the light source 21 and the left end of the diffusion plate, and w2 is the horizontal distance between the light source 21 and the right end of the diffusion plate.

[0077] The decreasing angle of adjacent first planes 1211 is:

[0078]

[0079] In the formula, is the decreasing angle of the first plane 1211, and n is the number of microprisms 121.

[0080] Then the angle θ2 between the first plane 1211 of the second microprism 121 and the light-emitting surface is:

[0081]

[0082] The angle θ3 between the first plane 1211 of the third microprism 121 and the light-emitting surface is:

[0083]

[0084] And so on.

[0085] The included angle between the first second plane 1212 arranged along the first direction and the light-emitting surface, that is, the included angle between the first micro prism 121 and the light-emitting surface is:

[0086]

[0087] In the formula, β1 is the included angle between the first second plane 1212 and the light-emitting surface;

[0088] The included angle between the last second plane 1212 arranged along the first direction and the light-emitting surface, that is, the included angle between the last micro prism 121 and the light-emitting surface is:

[0089]

[0090] In the formula, β n is the included angle between the last second plane 1212 and the light-emitting surface;

[0091] The decreasing angle of adjacent second planes 1212 is:

[0092]

[0093] In the formula, is the decreasing angle of the second plane 1212.

[0094] Then the included angle β2 between the second plane 1212 of the second micro prism 121 and the light-emitting surface is:

[0095]

[0096] The included angle β3 between the second plane 1212 of the third micro prism 121 and the light-emitting surface is:

[0097]

[0098] And so on.

[0099] When light is incident obliquely, refraction occurs at the junction of the two media, and the propagation direction changes. Therefore, the light emitted by the light source 21 is refracted and deflected at both the first incident surface 12 and the first exit surface 11 of the diffusion plate. By reasonably designing the angles of the first plane 1211 and the second plane 1212 of the micro prism 121, the deflected purpose of the emitted light can be achieved.

[0100] By setting the included angles of the first plane 1211 and the second plane 1212 of each micro prism 121 according to the above conditions, the generation of ineffective polarized light can be minimized as much as possible, and the polarized light effect of the diffusion plate deflecting in the first direction can be improved.

[0101] It should be understood that the diffusion plate of the embodiment of the present invention is applied to the polarized optical system of the mirror cabinet lighting device, θ nWith different values of and θ1, the deflection angle is different. The deflection angle in different environments can be designed according to actual needs, so as to adjust θ n and the values of θ1. For the scenario of the bathroom space, their value ranges can be the following numerical ranges:

[0102] The value range of w is 30 mm to 50 mm, the value range of w1 is 5 mm to 15 mm, the value range of w2 is 25 mm to 45 mm, the value range of h is 15 mm to 25 mm, the value range of n is 30 to 70, the value range of θ1 is 25° to 35°, and the value range of β1 is 80° to 120°.

[0103] Further, the second plane 1212 of the current micro prism 121 is connected to the first plane 1211 of the next micro prism 121 along the first direction.

[0104] Specifically, each micro prism 121 is connected to each other and closely connected, so that it is closely arranged on the first incident surface 12 of the diffusion plate, improving the surface utilization efficiency.

[0105] The embodiment of the present utility model also provides a polarization optical system, such as Figure 2 shown, including a light source 21 and a diffusion plate as in the above embodiment, and the first incident surface 12 of the diffusion plate faces the light source 21.

[0106] The light source 21 is arranged on the light source board 2. The main optical axis of the light source board 2 is set to deviate towards the first direction, and the angle between the main optical axis and the vertical direction is:

[0107]

[0108] In the formula, θ 光轴 is the angle between the main optical axis and the vertical direction, w is the width of the diffusion plate, w1 is the horizontal distance between the light source 21 and one end of the diffusion plate, and h is the vertical distance between the light source 21 and the diffusion plate.

[0109] Specifically, the vertical direction is the Y direction, which is perpendicular to the light-emitting surface of the polarization optical system. By setting the main optical axis inclined according to the above formula, the main optical axis of the light source board 2 can irradiate the center position of the diffusion plate, mainly reducing the light that cannot directly irradiate the diffusion plate, making the light irradiate the diffusion plate as much as possible, and avoiding excessive energy loss.

[0110] Further, as Figure 8 and Figure 9 shown, the polarization optical system further includes a first reflector 41. The first reflector 41 is arranged in the left area between the diffusion plate and the light source board 2. A first reflection surface is provided on the side of the first reflector 41 close to the light source 21 for reflecting the light irradiated on the left area to the diffusion plate.

[0111] Further, a second reflector 42 may be provided. The second reflector 42 is disposed in the right region between the diffusion plate and the light source plate 2. A second reflecting surface is provided on the side of the second reflector 42 close to the light source 21 for reflecting the light irradiated to the right region onto the diffusion plate.

[0112] The first reflector 41 and the second reflector 42 may be provided separately or simultaneously.

[0113] The first reflector 41, the second reflector 42 and the diffusion plate are formed by an extrusion process and are made of aluminum profiles or plastics.

[0114] The first reflecting surface receives the left light, and the second reflecting surface receives the right light. In order to increase the light reflection efficiency, the surfaces of the first reflecting surface and the second reflecting surface are polished, an electroplated light-reflecting coating is added, or matte treatment is performed, or a light-reflecting film may be pasted additionally.

[0115] The light emitted by the light source 21 is divided into three parts, namely left light, middle light and right light. Among them, the middle light directly irradiates the diffusion plate, the left light irradiates the first reflecting surface of the first reflector 41, and the right light irradiates the second reflecting surface of the second reflector 42.

[0116] The left light is irradiated onto the first reflecting surface and reflected, and the direction of the reflected light deflects from the Y-axis to the X-axis, thereby realizing the light deflection.

[0117] The right light is irradiated onto the second reflecting surface and reflected, and the direction of the reflected light deflects from the Y-axis to the X-axis, thereby realizing the light deflection.

[0118] By providing the first reflecting surface and the second reflecting surface, the left light and the right light that cannot directly irradiate the diffusion plate can be effectively utilized, the energy utilization efficiency can be improved, and the lighting effect can be enhanced.

[0119] Further, the first reflecting surface may be a plane or a curved surface, and the second reflecting surface may also be a plane or a curved surface.

[0120] In one example, the first reflecting surface is a plane with a curvature of 0, and the shape of the second reflecting surface is a curved surface with a changing curvature, which gradually decreases from the side close to the light source 21 to the side far from the light source 21, that is, the curvature value is large close to the light source 21 and gradually decreases far from the light source 21.

[0121] In another example, both the first reflecting surface and the second reflecting surface are curved surfaces with a changing curvature, which gradually increases from the side close to the light source 21 to the side far from the light source 21, that is, the curvature value of the curved surface is small close to the light source 21 and gradually increases far from the light source 21.

[0122] Among them, the light-emitting effect of the curved surface is better than that of the plane, and when the curvatures of the first reflecting surface and the second reflecting surface change, the light can be deflected in the positive direction of the X-axis, which is helpful for polarization.

[0123] Furthermore, the polarization optical system further includes a polarization lens 3, which is disposed on the light source board 2. The polarization lens 3 mainly consists of two optical surfaces, namely, a second incident surface 32 and a second exit surface 31. The light source 21 is placed within the second incident surface 32 of the polarization lens 3. The curvature of the second incident surface 32 of the polarization lens 3 gradually decreases from the left end to the right end of the polarization lens 3, and the curvature of the second exit surface 31 of the polarization lens 3 gradually increases from the left end to the right end of the polarization lens 3.

[0124] The polarization lens 3 is formed by an extrusion process and is made of optical plastic, including but not limited to polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), etc.

[0125] The polarization lens 3 is disposed on the light source board 2. The bottom surface of the lens is parallel to the light source board 2, and the polarization lens 3 and the light source board 2 jointly enclose the light source 21. The light source board 2 can be inclined, and the light source 21 and the polarization lens 3 are correspondingly inclined so that the emitted light is deflected toward the first direction.

[0126] In an example, assuming that the light exit surface faces upward, the light source board 2, the polarization lens 3, and the diffusion plate are sequentially arranged from bottom to top. The polarization lens 3 and the light source board 2 are inclined and tilted upward to the right. At this time, the first direction is the direction from left to right, that is, the positive direction of the X axis. Since the curvature of the second incident surface 32 of the polarization lens 3 gradually decreases from the left end to the right end of the polarization lens 3, and the curvature of the second exit surface 31 of the polarization lens 3 gradually increases from the left end to the right end of the polarization lens 3, according to the principle of light refraction, the light emitted by the light source 21 can be deflected to the right after passing through the polarization lens 3, and is generally deflected toward the positive direction of the X axis. In addition, the polarization lens 3 can also reduce the light distribution angle of the light source 21, having the effect of collecting light, making more light directly act on the diffusion plate, which can improve the light output efficiency and the overall illumination effect is brighter.

[0127] In the polarization optical system of the embodiment of the present invention, the light is emitted from the light source 21, and after being polarized and focused for the first time by the polarization lens 3, it is irradiated onto the diffusion plate, the first reflecting surface, and the second reflecting surface. The light irradiated onto the first reflecting surface and the second reflecting surface is reflected onto the diffusion plate, and then the micro prism 121 on the diffusion plate polarizes the light again and emits it, deflecting the light toward the first direction. By combining the polarization lens 3 and the diffusion plate to deflect the light twice, the emitted light can be deviated significantly toward the first direction.

[0128] In the polarization optical system of the embodiment of the present invention, by designing the angles of the first plane 1211 and the second plane 1212 of the micro prism 121, the light can be irradiated onto the first plane 1211 as much as possible, avoiding ineffective polarization and improving the deflection effect.

[0129] By setting the light source board 2 to be inclined, more light emitted by the light source 21 can be irradiated onto the diffusion plate, avoiding light waste.

[0130] By providing the first reflecting surface and the second reflecting surface, the light that cannot directly irradiate onto the diffusion plate can be effectively utilized, enhancing the lighting effect.

[0131] The embodiment of the present utility model further provides a mirror cabinet lighting device, as Figure 10 shown, which includes a polarization optical system as described in any one of the above embodiments. The mirror cabinet lighting device further includes a housing 5, and the polarization optical system is disposed within the housing 5.

[0132] The embodiment of the present utility model further provides a mirror cabinet, which includes the mirror cabinet lighting device as described in the above embodiment.

[0133] Specifically, as Figure 11 shown, the mirror cabinet further includes a mirror cabinet body, and the mirror cabinet lighting device is disposed in the edge area of the mirror cabinet body. For example, symmetrically disposed on the left and right sides, the upper and lower sides, or all around, etc., the light emitted from the light-emitting surface of the diffusion plate is deflected and then irradiated towards the middle of the mirror cabinet body, facilitating the user for lighting.

[0134] Although the exemplary embodiments and their advantages have been described in detail, those skilled in the art can make various changes, substitutions, and modifications to these embodiments without departing from the spirit of the present utility model and the defined protection scope, and such modifications and variations all fall within the defined scope.

Claims

1. A diffuser plate, applied to a polarized optical system, the diffuser plate comprising a first incident surface (12) and a first emitting surface (11), wherein the first incident surface (12) faces a light source (21) of the polarized optical system, and characterized in that: The first incident surface (12) is provided with a plurality of microprisms (121) arranged along a first direction, the microprisms (121) comprising a first plane (1211) and a second plane (1212), the first plane (1211) and the second plane (1212) of the same microprism (121) being connected to form a wedge-shaped structure, the tip of the wedge-shaped structure being inclined toward a first direction, wherein the first direction is parallel to a light-exiting surface of a polarized optical system.

2. The diffuser plate according to claim 1, characterized in that: The first plane (1211) is an optical surface, and the second plane (1212) is a non-optical surface.

3. The diffuser plate according to claim 2, characterized in that: The angle between the first plane (1211) and the light emitting surface and the angle between the second plane (1212) and the light emitting surface both decrease successively along the first direction.

4. The diffuser plate according to claim 3, characterized in that: The angle between the first first plane (1211) arranged along the first direction and the light emitting surface is: In the formula, θ1 is the angle between the first plane (1211) and the light emitting surface, w1 is the horizontal distance between the light source (21) and one end of the diffuser, n0 is the refractive index of the diffuser, and h is the vertical distance between the light source (21) and the diffuser; The angle between the last of the first planes (1211) arranged along the first direction and the light emitting surface is: In the formula, θ n is the angle between the last one of the first planes (1211) and the light emitting surface, and w2 is the horizontal distance between the light source (21) and the other end of the diffusion plate; The decreasing angles of adjacent first planes (1211) are: In the formula, is the decreasing angle of the first plane (1211), and n is the number of the microprisms (121); The angle between the first of the second planes (1212) arranged along the first direction and the light emitting surface is: Wherein, β1 is the angle between the first second plane (1212) and the light emitting surface; The angle between the last of the second planes (1212) arranged along the first direction and the light emitting surface is: In the formula, β n is the angle between the last one of the second planes (1212) and the light emitting surface; The decreasing angles of the adjacent second planes (1212) are: In the formula, is the decreasing angle of the second plane (1212).

5. The diffuser plate according to claim 1, characterized in that: The second plane (1212) of the current microprism (121) is connected to the first plane (1211) of the next microprism (121) along the first direction.

6. The diffuser plate according to claim 1, characterized in that: The first emission surface (11) is a plane.

7. The diffuser plate according to claim 1, characterized in that: The material of the diffusion plate is optical plastic, and diffusion powder is evenly arranged in the optical plastic.

8. A polarizing optical system, characterized in that: It comprises a light source (21) and a diffuser plate as claimed in any one of claims 1 to 7, wherein the first incident surface (12) of the diffuser plate faces the light source (21).

9. A mirror cabinet lighting device, characterized in that: Comprising the polarizing optical system as claimed in claim 8.

10. A mirror cabinet, characterized in that: The mirror cabinet lighting device comprises the mirror cabinet lighting device as claimed in claim 9.

Images