Optical element, light source module and lamp
By using a combination of bar optical lenses and light guide plates in the wall washing lamp, the problem of glare generated by existing wall washing lamps is solved, achieving the dual effects of wall washing and light guide, while improving the light effect and decorative effect.
Patent Information
- Application Number
- CN202310973791.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-03
- Publication Date
- 2025-02-14
AI Technical Summary
Existing wall washing lamps will cause glare when they illuminate the wall. Existing improvements such as adding light-shielding devices can prevent glare, but they will lead to loss of optical efficiency and unsightly appearance.
An optical element is provided, including a strip-shaped optical lens and a light guide plate. The lens part is used to gather light to form a wall washing effect, and the light guide plate part is used to soften the light source and avoid glare.
It achieves the effect of both wall washing and light guiding, avoiding glare, and improving the light and decorative effects, avoiding the loss of optical efficiency.
Smart Images
Figure CN119436027A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an optical element, and a light source module and a lamp comprising the optical element. Background Art
[0002] Wall washer lamps, as the name implies, let the light wash over the wall like water. They are a kind of lamp used for architectural decorative lighting. Wall washer lamps project their light onto the wall of a building to outline the building's contours.
[0003] Existing wall washer solutions such as Fig.10a As shown in the figure, while washing the wall, some light will hit the human eye, and the human eye will feel glare when looking at the lamp. The usual improvement solution is to add a shading device to block it, such as Fig.10b As shown, although this can effectively prevent glare, it will cause a loss of optical efficiency and is not aesthetically pleasing. Summary of the invention
[0004] The purpose of the present invention is to solve the above-mentioned problem and provide a wall-washing optical solution that can effectively avoid glare.
[0005] In order to achieve the above-mentioned effect, the technical solution adopted by the present invention is to provide an optical element, characterized in that the optical element includes a strip-shaped optical lens and a light guide plate. On a cross section perpendicular to the length direction of the optical lens, the light guide plate is arranged on one side of the optical lens and parallel to the length direction of the optical lens. The optical lens includes a first light incident surface and a first light emitting surface that are relatively arranged. The light guide plate includes a second light incident surface. The first light incident surface and the second light incident surface are connected to form a light source accommodating cavity recessed toward the inner side of the optical element for accommodating a light source. The light guide plate extends along the first light incident surface toward the first light emitting surface, and continues to extend after reaching the first light emitting surface. The light guide plate includes a second light emitting surface, and the second light emitting surface is arranged on the side of the light guide plate away from the optical lens.
[0006] Preferably, a reflective layer is provided on a surface of the light guide plate opposite to the second light emitting surface.
[0007] Preferably, the surface opposite to the second light emitting surface of the light guide plate is subjected to laser dot processing or silk screen dot processing.
[0008] Preferably, the optical lens is a polarizing lens, and the light emitted from the first light emitting surface is deflected in a direction away from the light guide plate.
[0009] Preferably, the optical lens is a TIR lens, comprising a reflective surface, one end of the reflective surface is connected to the first light incident surface, and the other end of the reflective surface is connected to the first light emitting surface.
[0010] Preferably, the optical lens is a hyperbolic lens, the first light incident surface is a free-curved surface that is concave toward the inside of the optical lens, and the first light emitting surface is a free-curved surface that is convex toward the outside of the optical lens.
[0011] Preferably, the ratio of the height of the light guide plate to the height of the optical lens is 2:1-10:1.
[0012] Preferably, the optical lens and the light guide plate are integrally formed.
[0013] The present application also provides a light source module, characterized in that it includes more than two light sources arranged in a straight line, a circuit board carrying the light sources, and the optical element as described above, wherein the light source is arranged in the light source accommodating cavity of the optical element.
[0014] The present application also provides a lamp, comprising the light source module as described above.
[0015] The optical element provided by the present invention realizes both the wall-washing and light-guiding effects. The wall-washing part can be a TIR lens or a hyperbolic lens, and the light-guiding part is a light guide plate. The lens part of the optical element converges the light, and the lens has a small light-emitting surface, forming a good wall-washing effect. The light guide plate emits soft light, effectively hiding the wall-washing lamp, while also avoiding the loss of optical efficiency, and making use of this light to form a certain decorative effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic structural diagram of an optical element according to a preferred embodiment of the present invention; Figure 2 yes Figure 1 Cross-sectional view of an optical element; Figure 3 yes Figure 1 A schematic diagram of the structure of a light source module composed of optical elements; Figure 4 yes Figure 3 Light path diagram of the light source module; Figure 5 yes Figure 3 The effect diagram of the light source module in use; Figure 6 is a schematic structural diagram of an optical element in another preferred embodiment of the present invention; Figure 7 yes Figure 6 Cross-sectional view of an optical element; Figure 8 yes Figure 6 A schematic diagram of the structure of a light source module composed of optical elements; Fig. 9 yes Figure 8 Light path diagram of the light source module; Fig.10a , 10b It is a schematic diagram of a prior art wall washing solution. Implementation
[0017] The lens, light source module and lamp proposed in the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] The structure of the optical element 1 in a preferred embodiment of the present application is as follows Figure 1 , Figure 2 As shown, the optical element 1 includes an optical lens 11 and a light guide plate 12. The optical lens 11 includes a first light incident surface 1101, a first light emitting surface 1102, and a reflective surface 1103 connecting the first light incident surface 1101 and the first light emitting surface 1102. The light guide plate 12 is in the shape of a flat plate and stands on one side of the optical lens 11. The stretching direction of the optical lens 11 is parallel to the light guide plate 12. Therefore, the main body of the optical element 1 is Figure 2 The cross section is formed by stretching the optical lens 1 as a whole along the stretching direction. Figure 1 . A side surface in the thickness direction of the light guide plate 12 is a second light incident surface 1201, and the plate plane on the side away from the optical lens 11 is a second light emitting surface 1202. The first light incident surface 1101 of the optical lens 11 and the second light incident surface 1201 of the light guide plate 12 are both recessed toward the inner side of the body of the optical element 1, and the first light incident surface 1101 and the second light incident surface 1201 of the light guide plate 12 are connected to each other to form a light source accommodating cavity 13. Generally speaking, the light incident surface of a side-emitting light guide structure is a plane, while in the present embodiment, the second light incident surface 1202 is a curved surface. Such a design is convenient for accommodating the light source, and can also guide the lateral light emission of the light source into the light guide plate 12, thereby improving the light efficiency.
[0019] like Figure 3 As shown, the optical element 1 of this embodiment can be used to form a light source module in combination with a light source 2, and the light source 2 is arranged in a light source accommodating cavity 13 of the optical element 1. Since the optical element 1 is a long strip as a whole, the light source accommodating cavity 13 is also a long strip, and more than two light sources 2 are accommodated in the light source accommodating cavity 13, and the light sources 2 are arranged in a straight line on a light source plate.
[0020] In this embodiment, the optical lens 11 is a TIR lens and a polarized lens. Figure 4As shown, the light emitted from the middle part of the light source 2 is refracted on both sides of the first light incident surface 1101 and the first light emitting surface 1102, and then deflected in the direction away from the light guide plate 12. After the light emitted from the side of the light source 2 enters the lens body through the first light incident surface 1101, it is emitted from the first light emitting surface 1102 after total reflection on the reflection surface 1103, and the emitted light is still deflected in the direction away from the light guide plate 12. A reflective layer 1203 is provided on the opposite side of the light guide plate 12 of the second light emitting surface 1202, so that all the light entering the light guide plate 12 will be emitted from the second light emitting surface 1202. The reflective layer 1203 can be formed by spraying a reflective material or coating, or a reflective film or reflective paper can be provided on the outside of the light guide plate 12, which is not limited in this application. At the same time, the surface of the light guide plate 12 on the inner side of the reflective layer 1203 is laser dotted or screen-printed with dots, the purpose of which is to disperse the light and make the light output softer and more uniform.
[0021] The optical path diagram of the light source module of this embodiment is as follows Figure 4 As shown, the light emitted by the light source 2 is divided into two parts, which enter the optical lens 11 and the light guide plate 12 from the first light incident surface 1101 and the second light incident surface 1201 respectively. The optical lens 11 deflects the light in the direction away from the light guide plate 12, and emits it from the first light output surface 1102. The light guide plate 12 stands on one side of the optical lens 11, extends along the first light incident surface 1101 toward the first light output surface 1102, and continues to extend after reaching the first light output surface 1102, that is, the height of the light guide plate 12 is higher than the optical lens 11. The light entering the light guide plate 12 is emitted from the surface of the light guide plate 12 on the side away from the optical lens 11, that is, the second light output surface 1202. The light source module of this embodiment is applied to a wall washer, and its use effect is as follows. Figure 5 As shown, the light emitted by the optical lens 11 brightens the wall, and the light emitted by the light guide plate 12 is soft and uniform without generating glare. The existence of the light guide plate 12 hides the optical lens 11 in an aesthetically pleasing manner, and the human eye can directly see through it, which not only plays a decorative role, but also utilizes this part of the light output to improve the light efficiency. In order to effectively hide the optical lens 11, the height of the light guide plate 12 is preferably 2 to 5 times the height of the optical lens 11. Of course, in some occasions where the light guide plate is needed as a decoration, the height ratio can also be increased to 10 times, or even greater. The height mentioned here refers to the farthest distance from the optical lens 11, the light guide plate 12 to the installation plane of the light source 2.
[0022] In the optical element 1 provided in this embodiment, the optical lens 11 and the light guide plate 12 are integrally formed, the process is simple, and the assembly is easy. Multiple effects such as wall washing, anti-glare, and decoration can be achieved through one element without reducing the light efficiency.
[0023] Another preferred embodiment of the present application is an optical element 1 ′ as shown in FIG. Figure 6 , Figure 7As shown, the optical element 1' also includes an optical lens 11' and a light guide plate 12'. The form of the light guide plate 12' is consistent with the previous embodiment, and is also sideways on one side of the optical lens 11', including a second light incident surface 1201' in the form of a curved surface, a second light emitting surface 1202' and a reflective layer 1203' arranged oppositely, and the second light emitting surface 1202' is arranged on the side away from the optical lens 11'. The difference from the previous embodiment lies in the form of the optical lens 11'. In this embodiment, although the optical lens 11' is still a polarizing lens, the lens form adopted is a hyperbolic lens, that is, the first light incident surface 1101' and the first light emitting surface 1102' are both curved surfaces. Among them, the first light incident surface 1101' is a free-form surface that is concave toward the inner side of the optical lens 11', and the first light emitting surface 1102' is a free-form surface that is convex toward the outer side of the optical lens 11'. The first light incident surface 1101' is still connected to the second light incident surface 1201' to form a light source accommodating cavity 13'.
[0024] The optical element 1' of this embodiment can be used to form a light source module in combination with a light source 2'. Figure 8 As shown, the light source 2' is disposed in the light source accommodating cavity 13' of the optical element 1'.
[0025] The optical path diagram of the light source module of this embodiment is as follows Fig. 9 As shown, the light emitted by the light source 2' is divided into two parts, which enter the optical lens 11' and the light guide plate 12' from the first light incident surface 1101' and the second light incident surface 1201' respectively. The optical lens 11' deflects the light in the direction away from the light guide plate 12', and emits it from the first light exiting surface 1102'. The light entering the light guide plate 12' is emitted from the surface of the light guide plate 12' on the side away from the optical lens 11', that is, the second light exiting surface 1202'. In this embodiment, the design of the hyperbolic surface makes the height of the optical lens 11' lower. Therefore, in order to effectively hide the optical lens 11', the height of the light guide plate 12' is 3 to 10 times the height of the optical lens 11', and of course it can also be larger.
[0026] The light source module of this embodiment is also suitable for wall washers, and can also be used in ceiling lamps, wall lamps, and line lamps to form backlight, line outline, and other effects. The above description of the preferred embodiments of the present application is for illustration and description, and is not intended to be exhaustive or limited to the specific form disclosed. Obviously, many modifications and changes may be made, which may be obvious to those skilled in the art and should be included in the scope of the present application defined by the attached claims.
Claims
1. An optical element, characterized in that: The optical element includes a strip-shaped optical lens and a light guide plate. On a cross section perpendicular to the length direction of the optical lens, the light guide plate is arranged on one side of the optical lens and parallel to the length direction of the optical lens. The optical lens includes a first light incident surface and a first light emitting surface that are relatively arranged. The light guide plate includes a second light incident surface. The first light incident surface and the second light incident surface are connected to form a light source accommodating cavity recessed toward the inner side of the optical element for accommodating a light source. The light guide plate extends along the first light incident surface toward the first light emitting surface and continues to extend after reaching the first light emitting surface. The light guide plate includes a second light emitting surface, and the second light emitting surface is arranged on the side of the light guide plate away from the optical lens.
2. The optical element according to claim 1, characterized in that A reflective layer is disposed on the surface opposite to the second light emitting surface of the light guide plate.
3. The optical element according to claim 1, characterized in that The surface opposite to the second light emitting surface of the light guide plate is processed by laser dotting or silk screen dot processing.
4. The optical element according to claim 1, characterized in that The optical lens is a polarizing lens, and the light emitted from the first light emitting surface is deflected toward a direction away from the light guide plate.
5. The optical element according to claim 4, characterized in that The optical lens is a TIR lens, comprising a reflective surface, one end of the reflective surface is connected to the first light incident surface, and the other end of the reflective surface is connected to the first light emitting surface.
6. The optical element according to claim 4, characterized in that The optical lens is a hyperbolic lens, the first light incident surface is a free-curved surface that is concave toward the inside of the optical lens, and the first light emitting surface is a free-curved surface that is convex toward the outside of the optical lens.
7. The optical element according to claim 1, characterized in that The ratio of the height of the light guide plate to the height of the optical lens is 2:1-10:
1.
8. The optical element according to any one of claims 1 to 7, characterized in that: The optical lens and the light guide plate are integrally formed.
9. A light source module, characterized in that: It comprises more than two light sources arranged in a straight line, a circuit board carrying the light sources, and an optical element as claimed in any one of claims 1 to 8, wherein the light source is arranged in the light source accommodating cavity of the optical element.
10. A lamp, characterized in that: The lamp comprises the light source module as claimed in claim 9.