Lens, optical module, backlight module and display device
By setting diffusion units, reinforcement units, and transition units on the lens, the amount of light in different light intensity areas can be adjusted, solving the problem that traditional lenses cannot achieve both uniform light distribution and versatility, thus achieving better uniform light distribution and reduced costs.
Patent Information
- Application Number
- CN202422758738.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Traditional lenses cannot achieve both uniform light distribution and versatility, resulting in high costs for LED displays.
A diffusion unit, an enhancement unit, and a transition unit are set on the light-incident and light-exit surfaces of the lens to adjust the amount of light in the strong light area, weak light area, and medium light area, respectively, so as to achieve uniform light distribution.
It improves the overall light uniformity of the lens, enhances compatibility with different backlight modules and display devices, and reduces costs.
Smart Images
Figure CN223526523U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of optical devices, in particular to a lens, an optical module, a backlight module and a display device. BACKGROUND
[0002] Display devices can transform electrical image-form data processed in information processing devices of electronic products into images that can be confirmed by the naked eye, and mainly include LED (Light Emitting Diode), CRT (Cathode Ray Tube), PDP (Plasma Display Panel), LCD (Liquid Crystal Display), EL (Electroluminescence), etc. Among them, LED displays are one of flat panel display devices that display images by controlling semiconductor light emitting diodes, and have advantages such as bright colors, wide dynamic range, high brightness, high definition, low operating voltage, small power consumption, long service life, impact resistance, and stable and reliable operation, and are widely used in the display industry. At present, the lens in the LED display is mainly used to realize secondary optical processing of the light source to meet the overall uniform light demand of the display.
[0003] In related technologies, in order to reduce display abnormal problems such as shadow, dark band, bright package, bright band, center area bright and periphery dark, local bright and dark, and chessboard, a special lens is generally used for secondary optical processing to improve the uniform light effect and display effect of the display. However, the use range of the special lens is limited, and the cost is high. CONTENT OF THE INVENTION
[0004] The present application provides a lens, an optical module, a backlight module and a display device to solve the technical problem that the traditional lens cannot balance the uniform light effect and the universality, resulting in high cost of the display.
[0005] Therefore, in a first aspect, the embodiments of the present application provide a lens, which comprises at least one of a diffusion unit, a strengthening unit and a transition unit, the diffusion unit is arranged in a strong light area of an incident light surface and / or an outgoing light surface of the lens, the strengthening unit is arranged in a weak light area of the incident light surface and / or the outgoing light surface, and the transition unit is arranged in a medium light area of the incident light surface and / or the outgoing light surface, wherein the light quantity of the strong light area is greater than that of the medium light area, and the light quantity of the medium light area is greater than that of the weak light area.
[0006] In a possible implementation, the diffusion unit comprises a spherical protrusion and / or a spherical groove, the spherical protrusion protrudes from the incident light surface and / or the outgoing light surface in a direction away from the lens, and the spherical groove is recessed in the incident light surface and / or the outgoing light surface in a direction close to the lens.
[0007] In a possible implementation, the height of the spherical protrusion and / or the spherical groove is 10 μm-300 μm in the direction of the light path of the lens.
[0008] In a possible implementation, the reinforcing unit comprises triangular protrusions protruding away from the lens in the light-incoming surface and / or the light-outgoing surface, and / or triangular recesses recessed towards the lens in the light-incoming surface and / or the light-outgoing surface.
[0009] In a possible implementation, the height of the triangular protrusions and / or the triangular recesses is 30 μm to 500 μm in the light path direction of the lens; and / or,
[0010] In a possible implementation, the length of the base of the triangular protrusions and / or the triangular recesses is 30 μm to 200 μm in the light path direction of the lens.
[0011] In a possible implementation, the transition unit comprises polygonal protrusions protruding away from the lens in the light-incoming surface and / or the light-outgoing surface, and / or polygonal recesses recessed towards the lens in the light-incoming surface and / or the light-outgoing surface.
[0012] In a possible implementation, the height of the polygonal protrusions and / or the polygonal recesses is 30 μm to 500 μm in the light path direction of the lens; and / or,
[0013] The length of the side of the polygonal protrusions and / or the polygonal recesses is 15 μm to 50 μm.
[0014] In a second aspect, the present application also provides an optical module, comprising a light source and the lens as described above, the light source being configured to emit a light beam, and the lens being arranged in the light path of the light beam.
[0015] In a third aspect, the present application also provides a backlight module, comprising a receiving container, a control member arranged in the receiving container, and the optical module as described above, the light source of the optical module being arranged in the control member and electrically connected to the control member, and the lens of the optical module being located on the side of the light source away from the control member.
[0016] In a fourth aspect, the present application also provides a display device, comprising a display panel and the backlight module as described above, the display panel displaying an image by using the light from the backlight module.
[0017] According to the lens, the optical module, the backlight module and the display device provided by the embodiments of the present application, the lens comprises at least one of a diffusion unit, a strengthening unit and a transition unit, the diffusion unit is arranged at a strong light area of an incident light surface and / or an emergent light surface of the lens, the strengthening unit is arranged at a weak light area of the incident light surface and / or the emergent light surface, and the transition unit is arranged at a medium light area of the incident light surface and / or the emergent light surface, wherein the light quantity of the strong light area is greater than that of the medium light area, and the light quantity of the medium light area is greater than that of the weak light area. According to the technical scheme of the present application, at least one of the diffusion unit, the strengthening unit and the transition unit is arranged on the incident light surface and / or the emergent light surface of the lens, so that the light quantity at the strong light area is reduced by the diffusion unit, the light quantity at the weak light area is increased by the strengthening unit, and the light quantity of the medium light area is moderate by the transition unit, so that the light emitted by the light source can enter the lens uniformly from the incident light surface side and / or be emitted uniformly from the emergent light surface side, and the overall uniform light effect of the lens is improved. Moreover, compared with the case that the conventional lens needs to be used in cooperation with a special backlight module / display device of a specified model and the application range of the conventional lens is limited, the lens provided by the embodiments can adjust the light quantity of different light intensity areas on the lens through the diffusion unit, the strengthening unit and the transition unit, so that the lens can be used in cooperation with backlight modules / display devices of different models, and the versatility is higher and the cost is lower. BRIEF DESCRIPTION OF DRAWINGS
[0018] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the embodiments of the present application and, together with the description, further serve to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings of one or more embodiments can be obtained by persons of ordinary skill in the art without creative effort based on these drawings. One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings, and these exemplary illustrations do not constitute a limitation on the embodiments. The elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.
[0019] Figure 1 A structural schematic diagram of a reflective backlight module provided by a first embodiment of the present application;
[0020] Figure 2 A structural schematic diagram of a reflective backlight module provided by a second embodiment of the present application;
[0021] Figure 3 A structural schematic diagram of a reflective backlight module provided by a third embodiment of the present application;
[0022] Figure 4 A structural schematic diagram of a refractive backlight module provided by the first embodiment of the present application;
[0023] Figure 5 A structure diagram of a refraction type backlight module provided by the second embodiment of the present application is shown in the figure;
[0024] Figure 6 A structure diagram of a refraction type backlight module provided by the third embodiment of the present application is shown in the figure;
[0025] Figure 7 An enlarged view of a diffusion unit of the lens provided by the embodiment of the present application is shown in the figure;
[0026] Figure 8 An enlarged view of a strengthening unit of the lens provided by the embodiment of the present application is shown in the figure;
[0027] Figure 9 An enlarged view of a transition unit of the lens provided by the embodiment of the present application is shown in the figure;
[0028] Figure 10 A light pattern curve of a traditional reflection type lens is shown in the figure;
[0029] Figure 11 A light pattern curve of a traditional refraction type lens is shown in the figure;
[0030] Figure 12 A light pattern curve of the lens provided by the embodiment of the present application is shown in the figure.
[0031] Explanation of reference numerals:
[0032] 100, diffusion unit; 200, strengthening unit; 300, transition unit;
[0033] 10, lens; 11, light inlet surface; 12, light outlet surface; 20, light source;
[0034] 1, control member. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0036] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For purposes of simplicity of the present disclosure, the following description will refer to specific examples of the present application. It is understood, however, that these are only examples and are not intended to limit the present application in any way. Furthermore, the present application can be practiced in different embodiments and examples that are not necessarily mutually exclusive, such as in combination with one another. Also, the present application provides various examples of specific processes and materials. One skilled in the art, however, can recognize that other processes and / or materials can be used without departing from the scope of the present application.
[0037] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof shall relate to the application as oriented in the drawing. The terms "front" and "back" generally refer to opposite sides of the device, and the terms "left" and "right" generally refer to sides of the device that are opposite each other. Unless specifically stated otherwise, the terms "on", "under", "above", "below", and words of similar import, when used in this disclosure, refer to the relative positioning of elements as shown in the figures. The spatially relative terms are intended to encompass different positions of the device in use or operation in addition to the positions depicted in the figures. For example, if a device is inverted or rotated about a vertical axis, the directional terms are interpreted accordingly, such as "under" becomes "over" or vice versa. Thus, the example term "under" can encompass both an over and under position. The device can be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0038] Referring to Figures 1 to 9 The embodiment of the present application provides a lens, comprising at least one of a diffusion unit 100, a strengthening unit 200 and a transition unit 300, the diffusion unit 100 is arranged at a strong light area of an incident light surface 11 and / or an emergent light surface 12 of the lens 10, the strengthening unit 200 is arranged at a weak light area of the incident light surface 11 and / or the emergent light surface 12, and the transition unit 300 is arranged at a medium light area of the incident light surface 11 and / or the emergent light surface 12, wherein the light quantity of the strong light area is greater than that of the medium light area, and the light quantity of the medium light area is greater than that of the weak light area.
[0039] In this embodiment, at least one of the diffusion unit 100, the strengthening unit 200 or the transition unit 300 is arranged on the light-incident surface 11 and / or the light-emitting surface 12 of the lens 10, so as to reduce the light quantity at the strong light area by the diffusion unit 100, increase the light quantity at the weak light area by the strengthening unit 200, and moderate the light quantity at the medium light area by the transition unit 300, so that the light emitted by the light source 20 can enter the lens 10 uniformly from the light-incident surface 11 side and / or be emitted uniformly from the light-emitting surface 12 side, thereby improving the overall uniform light effect of the lens 10. Moreover, compared with the conventional lens 10 which needs to be used in cooperation with a special backlight module / display device of a specified model, resulting in the application range of the conventional lens 10 being limited, the lens 10 provided in this embodiment can adjust the light quantity of different light intensity areas on the lens 10 by the diffusion unit 100, the strengthening unit 200 and the transition unit 300, so that it can be used in cooperation with backlight modules / display devices of different models, and has stronger universality and lower cost.
[0040] In an example, as shown in Figure 3 and Figure 6 The lens 10 can only include the diffusion unit 100 arranged at the strong light area of the light-incident surface 11 and / or the light-emitting surface 12, for diffusing and weakening the light entering the light-incident surface 11 and / or the light-emitting surface 12, so as to realize the light adjustment of the strong light area of the lens 10, improve the light-incident uniformity and / or the light-emitting uniformity of the lens 10, and achieve the secondary uniform light purpose of the lens 10. Of course, in other embodiments, the lens 10 can also only include the strengthening unit 200 or the transition unit 300, which are arranged in the same way as the foregoing diffusion unit 100, and only differ in the arrangement position, which will not be described in detail here. The present example provides a single adjustment type lens 10, which has simple structure, is convenient to process, and has lower cost.
[0041] In yet another example, as shown in Figure 2 and Figure 5As shown, the lens 10 can also be a combination of the diffusion unit 100 and the strengthening unit 200, at this time, the diffusion unit 100 and the strengthening unit 200 are arranged adjacent to each other on the light entrance surface 11 of the lens 10, the diffusion unit 100 can be arranged in the middle region of the light entrance surface 11, for diffusing the strong light in the middle region, reducing the light amount entering from the middle region; the strengthening unit 200 can be arranged at the periphery of the diffusion unit 100, that is, the strengthening unit 200 is arranged in the peripheral region of the light entrance surface 11, for gathering the light amount entering from the edge region, thereby improving the entering uniformity of the light from the side of the light entrance surface 11, improving the uniform light effect from the side of the light entrance surface 11. And, the diffusion unit 100 and the strengthening unit 200 can also be arranged adjacent to each other on the light exit surface 12 of the lens 10, the diffusion unit 100 can be arranged in the middle region of the light exit surface 12, for diffusing the strong light in the middle region, reducing the light amount emitted from the middle region; the strengthening unit 200 can be arranged at the periphery of the diffusion unit 100, that is, the strengthening unit 200 is arranged in the peripheral region of the light exit surface 12, for gathering the light amount emitted from the edge region, thereby improving the emitting uniformity of the light from the side of the light exit surface 12, improving the uniform light effect from the side of the light exit surface 12. Of course, in other embodiments, the lens 10 can also be a combination of the diffusion unit 100 and the transition unit 300, or a combination of the strengthening unit 200 and the transition unit 300, the arrangement mode is the same as the above-mentioned combination arrangement mode, only the arrangement position is different, which will not be described in detail here. The present example provides a mutual matching combination adjustment type lens 10, which improves the uniform light effect of the lens 10 in at least two aspects, has high uniform light precision, and has good versatility.
[0042] In another example, the lens Figure 1 and Figure 4As shown, the lens 10 can also be a combination of the diffusion unit 100, the strengthening unit 200 and the transition unit 300. In this case, the diffusion unit 100, the strengthening unit 200 and the transition unit 300 are arranged adjacent to each other on the light-in surface 11 of the lens 10. The diffusion unit 100 can be arranged in the middle region of the light-in surface 11 to diffuse the strong light in the middle region and reduce the amount of light entering the middle region. The strengthening unit 200 can be arranged in the peripheral region of the light-in surface 11 to gather the amount of light entering the edge region. The transition unit 300 is arranged at the outer periphery of the diffusion unit 100 and the inner periphery of the strengthening unit 200 between the diffusion unit 100 and the strengthening unit 200 to transition and balance the amount of incident light between the diffusion unit 100 and the strengthening unit 200, thereby improving the uniformity of the light entering the light-in surface 11 and improving the uniform light effect from the light-in surface 11. In addition, the diffusion unit 100, the strengthening unit 200 and the transition unit 300 can also be arranged adjacent to each other on the light-out surface 12 of the lens 10. The diffusion unit 100 can be arranged in the middle region of the light-out surface 12 to diffuse the strong light in the middle region and reduce the amount of light exiting the middle region. The strengthening unit 200 can be arranged in the peripheral region of the light-out surface 12 to gather the amount of light exiting the edge region. The transition unit 300 is arranged at the outer periphery of the diffusion unit 100 and the inner periphery of the strengthening unit 200 between the diffusion unit 100 and the strengthening unit 200 to transition and balance the amount of exiting light between the diffusion unit 100 and the strengthening unit 200, thereby improving the uniformity of the light exiting the light-out surface 12 and improving the uniform light effect from the light-out surface 12. The present example provides a composite adjustment type lens 10 with good uniform light effect, good light-out effect, good display and strong versatility.
[0043] It should be noted that the strong light region refers to the region of the light-in surface 11 / light-out surface 12 directly opposite the light source 20, which can have the most light per unit area. The weak light region refers to the region of the light-in surface 11 / light-out surface 12 away from / deviated from the light source 20, which can have the least light per unit area. The middle light region refers to the region of the light-in surface 11 / light-out surface 12 between the strong light region and the weak light region, which can have moderate light per unit area.
[0044] In a possible implementation, the lens 10 can be a reflective type lens 10 as shown in Figures 1 to 3 or a refractive type lens 10 as shown in Figures 4 to 6 The material of the lens 10 can be PMMA material or silicone material. When the lens 10 is a reflective type lens 10, the incident light and the exiting light of the lens 10 are on the same side of the lens 10, the light enters from the bottom of the lens 10 and exits from the bottom of the lens 10 after being reflected by the inner wall of the lens 10. When the lens 10 is a refractive type lens 10, the incident light and the exiting light of the lens 10 are on different sides of the lens 10, the light enters from the bottom of the lens 10 and exits from the top of the lens 10 after being refracted by the lens 10.
[0045] In a possible implementation, as shown in Figure 7 The diffusion unit 100 includes spherical protrusions protruding from the light-in surface 11 and / or the light-out surface 12 in a direction away from the lens 10 and / or spherical recesses recessed in the light-in surface 11 and / or the light-out surface 12 in a direction towards the lens 10. The diffusion unit 100 provided in this example includes a plurality of spherical protrusions arranged in an array, which can be spherical or ellipsoidal, and protruding in the strong light area of the light-in surface 11 and / or the light-out surface 12 to form a rough surface in the strong light area of the light-in surface 11 and / or the light-out surface 12, weaken the light quantity in the strong light area, and achieve the purposes of diffusing light and weakening light. Alternatively, the diffusion unit 100 can also include a plurality of spherical recesses arranged in an array, which can be spherical or ellipsoidal, and recessed in the strong light area of the light-in surface 11 and / or the light-out surface 12 to form a rough surface in the strong light area of the light-in surface 11 and / or the light-out surface 12, weaken the light quantity in the strong light area, and achieve the purposes of diffusing light and weakening light. Of course, in other embodiments, the diffusion unit 100 can also include a combination of a plurality of spherical protrusions and a plurality of spherical recesses, which can be arranged in an interval or intersected.
[0046] In a possible implementation, the height of the spherical protrusions and / or the spherical recesses is 10 μm to 300 μm in the direction of the light path of the lens 10. In this way, the height of the spherical protrusions and / or the depth of the spherical recesses can be in a proper range, so as to avoid the height of the spherical protrusions being too large and / or the depth of the spherical recesses being too large, which can cause the light to be diffused too much, the local light-out luminance of the lens 10 to be too low, and dark shadows or dark bands to occur; or avoid the height of the spherical protrusions being too small and / or the depth of the spherical recesses being too small, which can cause the light to be diffused too little, the local light-out luminance of the lens 10 to be too high, and bright spots or bright bands to occur, improve the light-out uniformity and luminance uniformity of the lens 10, and improve the display effect. For example, but not limited to, the height of the spherical protrusions and / or the spherical recesses is 50 μm, 100 μm, 150 μm, 200 μm, or 250 μm.
[0047] In an example, the heights of the plurality of spherical protrusions can be the same for easy processing, or different for targeted diffusion of light in the strong light area and weakening of the light quantity to improve the light-uniformity effect. The heights of the plurality of spherical recesses can be the same for easy processing, or different for targeted diffusion of light in the strong light area and weakening of the light quantity to improve the light-uniformity effect.
[0048] In a possible implementation, as shown in Figure 8As shown, the reinforcing unit 200 includes triangular protrusions protruding from the light-incident surface 11 and / or the light-emitting surface 12 in a direction away from the lens 10 and / or triangular recesses recessed in the light-incident surface 11 and / or the light-emitting surface 12 in a direction towards the lens 10. The reinforcing unit 200 provided in the present example includes a plurality of triangular protrusions arranged in rows or columns, which can be triangular prisms with two flat side surfaces, and the triangular protrusions are arranged protruding in the dim light area of the light-incident surface 11 and / or the dim light area of the light-emitting surface 12 to form V-shaped light-converging surfaces in the dim light area of the light-incident surface 11 and / or the dim light area of the light-emitting surface 12, thereby reinforcing the light-incident light quantity and / or the light-emitting light quantity in the dim light area and achieving the purposes of converging light rays, enhancing light quantity and light intensity. Alternatively, the reinforcing unit 200 can also include a plurality of triangular recesses arranged in rows or columns, which can be triangular prism recesses arranged recessed in the dim light area of the light-incident surface 11 and / or the dim light area of the light-emitting surface 12 to form triangular prism recesses in the dim light area of the light-incident surface 11 and / or the dim light area of the light-emitting surface 12, thereby reinforcing the light-incident light quantity and / or the light-emitting light quantity in the dim light area and achieving the purposes of converging light rays, enhancing light quantity and light intensity. Of course, in other embodiments, the reinforcing unit 200 can also be in the form of a combination of a plurality of triangular protrusions and a plurality of triangular recesses, which can be arranged in an interval manner or in an intersecting manner.
[0049] In an example, the triangular protrusions / triangular recesses can be isosceles right triangles or triangular pyramids close to right triangles, and the specific shape is not limited herein as long as the light can be converged. The shapes of the plurality of triangular protrusions / the plurality of triangular recesses can be the same to facilitate processing, or can be different to converge light rays in the dim light area in a targeted manner, enhance light quantity, and improve light uniformity.
[0050] In a possible implementation, the height of the triangular protrusions and / or the triangular grooves is 30 μm-500 μm in the light path direction of the lens 10; and / or the length of the base of the triangular protrusions and / or the triangular grooves is 30 μm-200 μm in the light path direction of the lens 10. In this way, the height of the triangular protrusions / the depth of the triangular grooves, and the length of the base of the triangular protrusions / the triangular grooves are within a suitable range, so as to avoid the following situations: the height of the triangular protrusions is too large / the depth of the triangular grooves is too large, which causes the light to be too concentrated, and the local light brightness of the lens 10 is too bright, and thus a bright package / bright band occurs; or the height of the triangular protrusions is too small / the depth of the triangular grooves is too small, which causes the light to be too weak, and the local light brightness of the lens 10 is too dark, and thus a dark shadow / dark band occurs; or the length of the base of the triangular protrusions / the triangular grooves is too large, the number of the triangular protrusions / the triangular grooves per unit area is too small, which causes poor light collection; or the length of the base of the triangular protrusions / the triangular grooves is too small, the number of the triangular protrusions / the triangular grooves per unit area is too large, which causes high production cost. In this way, the light uniformity and brightness uniformity of the lens 10 are improved, the display effect is improved, and the cost is reduced.
[0051] For example but not limited to, the height of the triangular protrusions / the triangular grooves is 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, or 450 μm; and the length of the base of the triangular protrusions / the triangular grooves is 50 μm, 100 μm, or 150 μm.
[0052] In a possible implementation, as shown in FIG. 2, the triangular protrusions and / or the triangular grooves are arranged in a staggered manner. Figure 9As shown, the transition unit 300 includes polygonal protrusions protruding from the light-in surface 11 and / or the light-out surface 12 in a direction away from the lens 10 and / or polygonal recesses recessed in the light-in surface 11 and / or the light-out surface 12 in a direction towards the lens 10. The transition unit 300 provided in the present example includes polygonal protrusions in a matrix distribution, which can be regular hexagonal convex spherical surfaces or diamond-shaped convex spherical surfaces, having multiple convex surfaces, which can appropriately disperse light rays and slightly focus light, and are protrudingly arranged in the middle light area of the light-in surface 11 and / or the light-out surface 12 to form a micro-lens 10 shape in the middle light area of the light-in surface 11 and / or the light-out surface 12, so as to keep the light-in light quantity and / or the light-out light quantity of the middle light area moderate and achieve the purpose of slightly focusing light and slightly increasing light quantity and light intensity. Alternatively, the transition unit 300 can also include polygonal recesses in a matrix distribution, which can be regular hexagonal concave spherical surfaces or diamond-shaped concave spherical surfaces, having multiple concave surfaces, which can appropriately disperse light rays and slightly focus light, and are recessed arranged in the middle light area of the light-in surface 11 and / or the light-out surface 12 to form a slightly focusing lens 10 shape in the middle light area of the light-in surface 11 and / or the light-out surface 12, so as to keep the light-in light quantity and / or the light-out light quantity of the middle light area moderate and achieve the purpose of slightly focusing light and slightly increasing light quantity and light intensity. Of course, in other embodiments, the transition unit 300 can also be in the form of a combination of multiple polygonal protrusions and multiple polygonal recesses, which can be distributed in an interval or staggered.
[0053] In an example, the polygonal protrusions / polygonal recesses can be regularly arranged for easy processing; or can be irregularly arranged, such as arranging larger polygonal protrusions / polygonal recesses near the strong light area side to disperse more light rays, and arranging smaller polygonal protrusions / polygonal recesses near the weak light area side to slightly focus light rays, so as to achieve precise light dispersion and focusing of the transition unit 300 and better uniform light effect.
[0054] In a possible implementation, the height of the polygonal protrusions and / or the polygonal grooves is 30-500 μm in the light path direction of the lens 10; and / or, the side length of the polygonal protrusions and / or the polygonal grooves is 15-50 μm. In this way, the height of the polygonal protrusions / the depth of the polygonal grooves, and the number of the polygonal protrusions / polygonal grooves are within a proper range, so as to avoid the following situations: the height of the polygonal protrusions is too large / the depth of the polygonal grooves is too large / the number of the polygonal protrusions / polygonal grooves is too large, which results in too large a degree of light gathering, and the local light brightness of the lens 10 is too bright, and thus a bright package / bright band occurs; or, the height of the polygonal protrusions is too small / the depth of the polygonal grooves is too small / the number of the polygonal protrusions / polygonal grooves is too small, which results in too large a degree of light diffusion, and the degree of light gathering is small, and the local light brightness of the lens 10 is too dark, and thus a dark shadow / dark band occurs, the light uniformity and the brightness uniformity of the lens 10 are improved, and the display effect is improved.
[0055] For example but not limited to, the height of the polygonal protrusions / polygonal grooves is 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, or 450 μm; and the side length of the polygonal protrusions / polygonal grooves is 20 μm, 30 μm, or 40 μm.
[0056] As shown in FIG. 6, the light type curve of the lens provided in the embodiment of the present application is the most uniform, and the uniform light effect is the best. Figures 10 to 12 As shown in FIG. 6, the light type curve of the lens provided in the embodiment of the present application is the most uniform, and the uniform light effect is the best. Figure 10 As shown in FIG. 6, the light type curve of the lens provided in the embodiment of the present application is the most uniform, and the uniform light effect is the best. Figure 11 As shown in FIG. 6, the light type curve of the lens provided in the embodiment of the present application is the most uniform, and the uniform light effect is the best. Figure 12 As shown in FIG. 6, the light type curve of the lens provided in the embodiment of the present application is the most uniform, and the uniform light effect is the best.
[0057] In addition, as shown in FIG. 6, the present application further provides an optical module, which comprises a light source 20 and the lens 10 as described above, the light source 20 is used for emitting a light beam, and the lens 10 is arranged in the light source 20 in a collimated light path and / or a diffused light path. The specific structure of the lens 10 is referred to the above embodiments, since the optical module adopts all the technical solutions of the above embodiments, and thus at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Figures 1 to 6
[0058] In the embodiment, an optical module with good uniform light effect is provided, which is configured to at least include a light source 20 and a lens 10. The light source 20 can be a point light source such as an LED lamp bead, which can be arranged on a circuit board and turned on and off through the circuit board. The lens 10 can be arranged outside the light source 20 and abut against the circuit board. At this time, the lens 10 can be used as a collimating lens 10 for collimating the divergent light emitted by the point light source into parallel light for subsequent light path adjustment. Alternatively, the lens 10 can be arranged apart from the light source 20 and used as a diffusion lens 10. At this time, the lens 10 is used for mixing and diffusing the parallel light emitted by the point light source and collimated, so as to improve the uniform light effect and soft light effect of the optical module. Alternatively, two lenses 10 can be arranged, one of which is used as a collimating lens 10 and the other is used as a diffusion lens 10, so as to further improve the uniform light effect and display effect. The optical module provided in the example has good uniform light effect, small thickness and small overall weight, and can realize the light and thin production of the optical module.
[0059] In addition, as shown in Figures 1 to 6 The application further provides a backlight module, which includes a receiving container (not shown in the figure), a control member 1 arranged in the receiving container, and the optical module as described above. The light source 20 of the optical module is arranged on the control member 1 and electrically connected with the control member 1. The lens 10 of the optical module is located on the side of the light source 20 away from the control member 1. The specific structure of the optical module is referred to the above-mentioned embodiments. Since the backlight module adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described here one by one.
[0060] In the embodiment, a backlight module with good light uniformity and display effect is provided, which is configured as a combined component including a receiving container, a control member 1 and an optical module. The receiving container can be a fixed frame for fixing and accommodating the control member 1 to provide support for the control member 1 and the optical module, and to provide mechanical protection for the control member 1 and improve the waterproof and dustproof effect of the backlight module. The control member 1 can be a control circuit board on which at least a switching circuit and a protection circuit are arranged. The protection circuit is used to realize overload protection of the control member 1 and improve the use safety. The control member 1 can be connected in the receiving container by clamping, which is stable in connection and has strong anti-falling and anti-impact performance. The light source 20 of the optical module can be provided in multiple numbers, and the multiple light sources 20 can be connected in parallel to the switching circuit of the control member 1. In this way, when one of the light sources 20 is damaged, the operation of other light sources 20 is not affected, and the anti-accident risk capability is high. At this time, the local light control adjustment of the backlight module can be realized by turning on the light source 20 in the local area, so as to realize the local light uniformity of the backlight module. Alternatively, the multiple light sources 20 can also be connected in parallel to the switching circuit of the control member 1 to reduce the difficulty of circuit setting. At this time, the full-surface light uniformity of the backlight module can be realized.
[0061] In addition, the application also provides a display device including a display panel (not shown in the figure) and the backlight module as described above. The display panel displays images by using light from the backlight module. The specific structure of the backlight module is referred to the above embodiments. Since the display device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0062] The display device provided in the embodiment can be a television, a computer, an LED projection screen, a television reader display screen, a mobile phone display screen or a smart watch display screen, etc. The use scenarios are rich, the static picture display clarity is high, the contrast is good, and the dynamic picture has no trailing.
[0063] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless otherwise specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.
[0064] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example implementations.
[0065] The foregoing is just a summary of the present application and thus can not include all applications of the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A lens characterized by, The lens comprises at least one of a diffusion unit, a strengthening unit and a transition unit, the diffusion unit is arranged in a strong light area of an incident light surface and / or an emergent light surface of the lens, the strengthening unit is arranged in a weak light area of the incident light surface and / or the emergent light surface, and the transition unit is arranged in a medium light area of the incident light surface and / or the emergent light surface, wherein the light quantity of the strong light area is greater than that of the medium light area, and the light quantity of the medium light area is greater than that of the weak light area.
2. The lens of claim 1, wherein The diffusion unit comprises a spherical protrusion and / or a spherical recess, the spherical protrusion protrudes from the incident light surface and / or the emergent light surface in a direction away from the lens, and the spherical recess is recessed in the incident light surface and / or the emergent light surface in a direction close to the lens.
3. The lens of claim 2, wherein In the direction of the light path of the lens, the height of the spherical protrusion and / or the spherical recess is 10 μm-300 μm.
4. The lens of claim 1, wherein The strengthening unit comprises a triangular protrusion and / or a triangular recess, the triangular protrusion protrudes from the incident light surface and / or the emergent light surface in a direction away from the lens, and the triangular recess is recessed in the incident light surface and / or the emergent light surface in a direction close to the lens.
5. The lens of claim 4, wherein, In the direction of the light path of the lens, the height of the triangular protrusion and / or the triangular recess is 30 μm-500 μm; and / or, In the direction of the light path of the lens, the length of the base of the triangular protrusion and / or the triangular recess is 30 μm-200 μm.
6. The lens of claim 1, wherein The transition unit comprises a polygonal protrusion and / or a polygonal recess, the polygonal protrusion protrudes from the incident light surface and / or the emergent light surface in a direction away from the lens, and the polygonal recess is recessed in the incident light surface and / or the emergent light surface in a direction close to the lens.
7. The lens of claim 6, wherein In the direction of the light path of the lens, the height of the polygonal protrusion and / or the polygonal recess is 30 μm-500 μm; and / or, The length of the side of the polygonal protrusion and / or the polygonal recess is 15 μm-50 μm.
8. An optical module characterized by comprising: The optical module comprises a light source and a lens according to any one of claims 1-7, the light source is used for emitting a light beam, and the lens is arranged in the light source in a collimated light path and / or a diffused light path.
9. A backlight module, characterized in that, The optical module comprises: a receiving container; a control member arranged in the receiving container; and a light source arranged in the control member and electrically connected to the control member, and a lens of the optical module is located on a side of the light source away from the control member. The backlight module comprises a display panel and a backlight module according to claim 9, and the display panel displays an image by using light from the backlight module.
10. A display device, characterized by comprising: