Light emitting assembly and monitoring device

Abstract

This application relates to the field of optical element technology, and provides a light-emitting component and a monitoring device. The light-emitting component includes: a substrate with a mounting surface; an off-axis light source including a light-emitting chip and a primary lens, wherein the light-emitting chip is disposed on the mounting surface of the substrate, the primary lens has a bonding surface and a light-emitting curved surface connecting the bonding surface, wherein a symmetry axis and a tangent are defined on the bonding surface, the symmetry axis causes the bonding surface to be mirror-divided in half, the tangent is perpendicular to the symmetry axis and passes through the center point of the symmetry axis, and a tangent extends from the tangent and the tangent is perpendicular to the symmetry axis; and a secondary lens including a first curved surface, a first surface, a second curved surface, a second surface and an inclined plane connected end to end, the first curved surface serving as a refractive surface and the second curved surface serving as a total internal reflection surface. This light-emitting component can effectively control light radiation and can effectively control the off-axis of light rays. When applied to a monitoring device, it can enhance the light radiation energy of the observation area.

Description

Technical Field

[0001] This application relates to the field of optical element technology, and more specifically, to a light-emitting component and a monitoring device. Background Technology

[0002] In the present technology, for aesthetic reasons, most surveillance equipment (such as surveillance cameras) is installed in the corner of the monitored area. However, this installation method often results in overexposure of the corner wall in the monitored image. To avoid the wall overexposure, the image of the non-wall area will be dark. The existing surveillance equipment usually contains a self-emitting light source as system supplementary light. The most common light source is LED light source (light-emitting diode, LED). However, the emission angle of LED light source is mostly axially symmetrical, such as 50°, 90°, 120° and 150°. Therefore, a lot of light radiation will hit the nearby wall and be directly reflected to the lens, resulting in image overexposure. Moreover, this light radiation is not effectively used in the monitored area, which also indirectly leads to poor system power efficiency and increases the difficulty of system heat dissipation.

[0003] To address this, existing technologies have designed off-axis LED light sources. Although such off-axis LED light sources can effectively reduce the light radiation energy illuminating the wall, the light-controlling surface of the LED light source only has one light-emitting surface, so it is still impossible to completely control the light radiation, and some light radiation will still irradiate the wall. Summary of the Invention

[0004] The main objective of this invention is to provide a light-emitting component that addresses the technical problem of off-axis LED light sources in existing monitoring equipment being unable to effectively control light radiation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a light-emitting component, comprising:

[0006] A substrate having a mounting surface;

[0007] An off-axis light source includes a light-emitting chip and a primary lens. The light-emitting chip is disposed on the mounting surface of the substrate. The primary lens has a bonding surface and a light-emitting curved surface connecting the bonding surface. The primary lens covers the light-emitting chip. The bonding surface is bonded to the mounting surface. A symmetry axis and a tangent are defined on the bonding surface. The symmetry axis causes the bonding surface to be mirror-divided in half. The tangent is perpendicular to the symmetry axis and passes through the center point of the symmetry axis. A sectional surface extends from the tangent and is perpendicular to the symmetry axis. The sectional surface divides the light-emitting curved surface into a first half and a second half. The curvature of the first half is greater than the curvature of the second half.

[0008] A secondary lens comprises a first curved surface, a first surface, a second curved surface, a second surface, and an inclined plane connected end to end. The first curved surface serves as a refractive surface, and the second curved surface serves as a total reflection surface. The first curved surface is adjacent to and opposite to the second half of the curved surface. It passes through the intersection of the axis of symmetry and the tangent and has an angle between the perpendicular axis of the axis of symmetry and the tangent and the extension direction of the inclined plane. The angle is acute.

[0009] Furthermore, the light-emitting chip is located at the intersection of the axis of symmetry and the tangent, with the included angle being 12° to 18°.

[0010] Furthermore, both the first surface and the second surface are planar, wherein the extension direction of the first surface and the extension direction of the second surface are both parallel to the axis of symmetry and perpendicular to the vertical axis.

[0011] Furthermore, the height of the light-emitting component in the extension direction of the vertical axis is less than 12.4 mm, and the length of the secondary lens in the extension direction of the axis of symmetry is less than the height of the secondary lens in the extension direction of the vertical axis.

[0012] Furthermore, the height of the light-emitting component in the direction of extension of the vertical axis is 6mm, and the length of the secondary lens in the direction of extension of the axis of symmetry is 4mm.

[0013] Furthermore, the off-axis light source is an off-axis light source with an off-axis angle of 55°.

[0014] Furthermore, the x-axis is defined to be parallel to the axis of symmetry, the y-axis is defined to be parallel to the vertical axis, and the z-axis is defined to be parallel to the tangent. The first surface satisfies the formula: y = 14.613x 4 -84.518x 3 +181.1x 2 -172.14x+62.781.

[0015] Furthermore, the x-axis is defined to be parallel to the axis of symmetry, the y-axis is defined to be parallel to the vertical axis, and the z-axis is defined to be parallel to the tangent. The second surface satisfies the formula: y = 1.1382x 3 -11.369x 2 +39.344x-45.783.

[0016] Furthermore, the second curved surface has two ends in the extension direction parallel to the vertical axis. When the secondary lens is made of silicone, the incident angle of the light emitted by the off-axis light source after passing through the first curved surface to the two ends is greater than 45°. When the secondary lens is made of glass, acrylic, or plastic, the incident angle of the light emitted by the off-axis light source after passing through the first curved surface to the two ends is greater than 40°.

[0017] In addition, the present invention also provides a monitoring device, wherein the monitoring device includes the above-mentioned light-emitting component, and the monitoring device is used to be installed on a wall adjacent to the monitoring area.

[0018] The beneficial effects of the light-emitting component provided in this application are as follows:

[0019] In the light-emitting component provided in this embodiment of the invention, a secondary lens is provided. This secondary lens comprises a first curved surface, a first surface, a second curved surface, a second surface, and an inclined plane connected sequentially. The second curved surface serves as a total internal reflection surface, which can deflect the undeflected light rays emitted from the second half of the curved surface of the off-axis light source. For example, when this light-emitting component is applied to a monitoring device, the second half of the curved surface of the off-axis light source faces the wall (or wall surface) at the installation location. Much of the light radiation that originally irradiated the nearby wall or wall surface is directly reflected back to the lens, causing image overexposure. These light radiations were not effectively used in the monitoring area, which indirectly led to poor electrical efficiency of the system and increased the difficulty of system heat dissipation. However, because the second half of the curved surface of the off-axis light source in the embodiment of the present invention is provided with a secondary lens, these light rays can be effectively refracted and reflected, so that these light rays are emitted in a direction away from the wall (or wall surface) and no longer illuminate the wall (or wall surface), thereby making the corresponding light radiation effectively used in the monitoring area. It can be seen that the light-emitting component provided in the embodiment of the present invention can effectively control the off-axis of the light rays and can improve the light radiation energy of the observation area when applied to monitoring equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A perspective view of a light-emitting component provided for one embodiment of this application;

[0022] Figure 2 A perspective view of a light-emitting component provided in one embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the optical path of the light-emitting component provided in the embodiments of this application;

[0024] Figure 4 A schematic diagram of the light-emitting component provided in the embodiments of this application;

[0025] Figure 5 A top view of a primary lens in a light-emitting component provided in an embodiment of this application;

[0026] Figure 6 For the corresponding Figure 3 The embodiment provides a simulation diagram of the illuminance distribution on the illuminated surface when the light-emitting component is installed not adjacent to a wall surface;

[0027] Figure 7 For the corresponding Figure 3 The embodiment provides a simulation diagram of the illuminance distribution of the illuminated surface when the light-emitting component is installed near a wall.

[0028] Figure 8 This is a simplified schematic diagram showing only the off-axis LED light source in the light-emitting component provided in the embodiments of this application;

[0029] Figure 9 For the corresponding Figure 8 The embodiment provides a simulation diagram of the illuminance distribution of the illuminated surface when the off-axis LED light source is installed without being adjacent to a wall.

[0030] Figure 10 For the corresponding Figure 8 The embodiment provides a simulation diagram of the illuminance distribution of the illuminated surface when the off-axis LED light source is installed near a wall.

[0031] The details of the reference numerals used in the above figures are as follows:

[0032] 1-Substrate;

[0033] 2- Primary lens;

[0034] 3-Vertical axis;

[0035] 11-Mounting surface;

[0036] 21-Laying surface;

[0037] 22-Axis of symmetry;

[0038] 23-Tangent;

[0039] 24 - First half of the surface;

[0040] 25 - Second half of the surface;

[0041] 100-Secondary Lens;

[0042] 101 - First surface;

[0043] 102 - First surface;

[0044] 103 - Second surface;

[0045] 104 - Second surface;

[0046] 105 - Inclined plane. Detailed Implementation

[0047] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0048] It should be noted that when a component is referred to as being "fixed to" or "located on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] To illustrate the technical solutions described in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0052] See Figures 1 to 5 This invention provides a light-emitting component, which is particularly suitable as a light-emitting device for monitoring equipment (such as a surveillance camera), but is not limited to light-emitting devices used only as monitoring equipment.

[0053] The light-emitting component includes:

[0054] Substrate 1, substrate 1 having mounting surface 11;

[0055] An off-axis light source (e.g., an off-axis LED light source) includes a light-emitting chip and a primary lens 2. The light-emitting chip is disposed on a mounting surface 11 of a substrate 1. The primary lens 2 has a bonding surface 21 and a light-emitting curved surface connecting the bonding surface. The primary lens 2 covers the light-emitting chip. The bonding surface 21 is bonded to the mounting surface 11. A symmetry axis 22 and a tangent 23 are defined on the bonding surface 21. The symmetry axis 22 causes the bonding surface 21 to be mirror-divided in half. The tangent 23 is perpendicular to the symmetry axis 22 and passes through the center point of the symmetry axis 22. A tangent surface extends from the tangent and is perpendicular to the symmetry axis. The tangent surface divides the light-emitting curved surface into a first half-curved surface 24 and a second half-curved surface 25. The curvature of the first half-curved surface 24 is greater than the curvature of the second half-curved surface 25, causing the light emitted by the off-axis light source to be biased towards the first half-curved surface 24.

[0056] The secondary lens 100 includes a first curved surface 101, a first surface 102, a second curved surface 103, a second surface 104, and an inclined plane 105 connected end to end. The first curved surface 101 serves as a refractive surface, and the second curved surface 103 serves as a total reflection surface. The first curved surface 101 is adjacent to the second half curved surface 25 and opposite to the second curved surface 103. It passes through the intersection of the axis of symmetry 22 and the tangent 23 and has an angle α between the perpendicular axis 3 of the axis of symmetry 22 and the tangent 23 and the extension direction of the inclined plane 105. The angle α is an acute angle.

[0057] Here, "connected end to end" refers to the sequential connection of the first curved surface 101, the first surface 102, the second curved surface 103, the second surface 104, and the inclined plane 105, with the inclined plane 105 finally connecting back to the first curved surface 101, forming a complete outer perimeter. Figure 3 For example, the first curved surface 101, the first surface 102, the second curved surface 103, the second surface 104, and the inclined plane 105 are connected end to end in a counterclockwise direction.

[0058] In the light-emitting component provided in this embodiment of the invention, a secondary lens 100 is provided. The secondary lens 100 includes a first curved surface 101, a first surface 102, a second curved surface 103, a second surface 104, and an inclined plane 105 connected end to end. The second curved surface 103 serves as a total internal reflection surface. The secondary lens 100 can deflect the light emitted from the second half of the curved surface 25 from the off-axis light source. See [reference needed]. Figure 3In this process, the unreflected light rays emitted from the second half of the curved surface 25 of the off-axis light source are deflected sequentially through S1 (refraction), S2 (total internal reflection), and S3 (refraction). For example, when this light-emitting component is applied to monitoring equipment, the second half of the curved surface 25 of the off-axis light source faces the wall of the installation location. The wall does not necessarily refer to the wall of a physical wall; it can also refer to the wall of a spatial barrier, such as the corner of a large frame where the monitoring equipment is installed. The wall mentioned here can refer to the wall of the large frame. Originally, much of the light radiation would have been reflected directly to the lens after hitting the nearby wall or adjacent wall, resulting in overexposure of the image. Furthermore, these light radiations are not effectively used in the monitoring area, which indirectly leads to poor system electrical efficiency and increases the difficulty of system heat dissipation. However, since the second half curved surface 25 of the off-axis light source in this embodiment of the invention is provided with a secondary lens 100, these light rays can be effectively refracted and reflected, so that these light rays are emitted in a direction away from the wall (or wall surface) and no longer illuminate the wall (or wall surface), thereby making the corresponding light radiation effectively used in the monitoring area. It can be seen that the light-emitting component provided in the embodiment of the invention can effectively control the off-axis of the light rays and improve the light radiation energy of the observation area when applied to monitoring equipment.

[0059] According to one embodiment of the present invention, the light-emitting chip is located at the intersection of the axis of symmetry 22 and the tangent 23, with an included angle α of 12° to 18°, for example 15°, to ensure the effective illumination range of the light and improve the utilization efficiency of the light. In addition, the inclined plane 105 should be inclined toward the light-emitting side of the off-axis light source.

[0060] See Figure 3 According to an embodiment of the present invention, the first surface 102 and the second surface 104 are both planar, wherein the extension direction of the first surface 102 and the extension direction of the second surface 104 are both parallel to the axis of symmetry 22 and perpendicular to the vertical axis 3.

[0061] See Figure 3According to one embodiment of the present invention, the height H of the light-emitting component in the extension direction of the vertical axis 3 is less than 12.4 mm. The height H of the light-emitting component in the extension direction of the vertical axis 3 is the total height of the substrate 1 and the secondary lens 100 in the extension direction of the vertical axis 3. Furthermore, the length D of the secondary lens 100 in the extension direction of the axis of symmetry 22 is less than the height h of the secondary lens 100 in the extension direction of the vertical axis 3. Some conventional secondary lenses are too large and difficult to apply in monitoring equipment. Under the overall optical design of the light-emitting component in this embodiment of the present invention, the height h of the provided secondary lens 100 is less than 12.4 mm, which is beneficial for use in optical systems with limited module space, and is particularly suitable for application in monitoring equipment. Specifically, the height H can be 10 mm or 6 mm. More preferably, the length D can be 4 mm. When the height H reaches 10 mm, the undeflected light can be controlled within 10%. In the light-emitting component provided in this embodiment of the present invention, at most only 50% of the light will pass through the secondary lens 100, causing light loss. However, in conventional secondary lenses, all light passes through the secondary lens for light control, so the optical efficiency is worse than that of the secondary lens 100 provided in this application.

[0062] See Figure 3 According to one embodiment of the present invention, the x-axis is defined to be parallel to the axis of symmetry 22, the y-axis is defined to be parallel to the vertical axis 3, and the z-axis is defined to be parallel to the tangent 23, wherein...

[0063] See Figure 3 The first surface 102 and the second surface 104 are both parallel to the x-axis.

[0064] See Figure 3 According to an embodiment of the present invention, the coordinate system established by the first surface 101 about the x-axis, y-axis, and z-axis satisfies the formula: y = 14.613x 4 -84.518x 3 +181.1x 2 -172.14x + 62.781, the coordinate system established by the first surface 101 about the x-axis, y-axis, and z-axis satisfies this formula. Specifically, when observed along the z-axis, the coordinates of all points on the first surface 101 satisfy this formula in the planar coordinate system established by the x-axis and y-axis. That is, when observed along the z-axis, the coordinates of points on the curve coinciding with the first surface 101 at any cross-section of the secondary lens 100 perpendicular to the z-axis all satisfy this formula in the planar coordinate system established by the x-axis and y-axis. The so-called satisfaction of this formula is based on design principles and theories. In practice, an error value can be tolerated or a suitable deviation from this formula can be allowed (y = 14.613x). 4 -84.518x 3 +181.1x 2 -172.14x+62.781), for example, with a deviation distance within ±2mm.

[0065] See Figure 3 According to an embodiment of the present invention, the coordinate system established by the second surface 103 about the x-axis, y-axis, and z-axis satisfies the formula: y = 1.1382x 3 -11.369x 2 +39.344x-45.783, the coordinate system established by the second surface 103 about the x-axis, y-axis, and z-axis satisfies this formula. Specifically, when observed along the z-axis, the coordinates of all points on the second surface 103 satisfy this formula in the planar coordinate system established by the x-axis and y-axis. That is, when observed along the z-axis, the coordinates of points on the curve coinciding with the second surface 103 at any cross-section of the secondary lens 100 perpendicular to the z-axis all satisfy this formula in the planar coordinate system established by the x-axis and y-axis. The so-called satisfaction of this formula is based on design principles and theories. In practice, an error value can be tolerated or a suitable deviation from this formula can be allowed (y=1.1382x). 3 -11.369x 2 +39.344x-45.783), for example, with a deviation distance within ±2mm.

[0066] See Figure 4 The second curved surface 103 has two ends in the direction of extension parallel to the vertical axis 3. When the secondary lens 100 is made of silicone, the incident angle θ of the light emitted from the off-axis light source after passing through the first curved surface 10 and striking the two ends is greater than 45°. Figure 4 When both angles θ are greater than 45°, and the secondary lens 100 is made of glass, acrylic, or plastic, the incident angles θ of the light emitted from the off-axis light source after passing through the first curved surface 10 and striking both ends are both greater than 40°. Figure 4 The two θ values ​​are each greater than 40°. The secondary lens 100 is made of glass, acrylic, plastic, or silicone. For the specific θ values, please refer to Table 1 below.

[0067] Angle of incidence (θ) θ≥45° θ≥40° θ≥40° θ≥40°

[0068] Table 1

[0069] According to a specific embodiment of the present invention, the off-axis light source is a 55° off-axis light source (but is not limited to 55°). Figure 6 For the corresponding Figure 3 The embodiment provides a simulation diagram of the illuminance distribution of the illuminated surface when the light-emitting component (using an off-axis 55° LED light source) is installed without being adjacent to a wall surface; Figure 7 For the corresponding Figure 3 The embodiment provides a simulation diagram of the illuminance distribution of the illuminated surface when the light-emitting component is installed near a wall. Figure 8This is a simplified schematic diagram showing only the substrate 1 and the off-axis light source (55° off-axis LED light source) in the light-emitting component provided in the embodiments of this application; Figure 9 For the corresponding Figure 8 The embodiment provides a simulation diagram of the illuminance distribution of the illuminated surface when the off-axis light source (55° off-axis LED light source) is installed without being adjacent to the wall. Figure 10 For the corresponding Figure 8 The embodiment provides a simulation diagram of the illuminance distribution of the illuminated surface when the off-axis light source (55° off-axis LED light source) is installed near a wall. See [link / reference]. Figure 3 , Figures 6 to 10 When the off-axis light source in the light-emitting component of the present invention is an off-axis 55° light source, a comparison between the light-emitting component of the present invention and the case with only an off-axis 55° light source reveals that, since the light-emitting component of the present invention uses the aforementioned secondary lens 100, compared to the case with only an off-axis 55° light source, it is possible to deflect the undeflected light rays emitted from the second half curved surface 25 of the off-axis light source, so that the corresponding light radiation can be used more effectively for the monitoring area.

[0070] In addition, the present invention also provides a monitoring device, such as a surveillance camera, wherein the monitoring device includes the above-mentioned light-emitting component. The monitoring device obviously includes all the advantages of the above-mentioned light-emitting component, which will not be repeated here. The monitoring device is particularly suitable for installation on the wall adjacent to the monitoring area to solve the problems of overexposure of traditional images, poor electrical efficiency of the system and difficulty in system heat dissipation.

[0071] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A light-emitting component, characterized in that, include: A substrate having a mounting surface; An off-axis light source includes a light-emitting chip and a primary lens. The light-emitting chip is disposed on the mounting surface of the substrate. The primary lens has a bonding surface and a light-emitting curved surface connecting the bonding surface. The primary lens covers the light-emitting chip. The bonding surface is bonded to the mounting surface. A symmetry axis and a tangent are defined on the bonding surface. The symmetry axis causes the bonding surface to be mirror-divided in half. The tangent is perpendicular to the symmetry axis and passes through the center point of the symmetry axis. A tangent extends from the tangent and is perpendicular to the symmetry axis. The tangent divides the light-emitting curved surface into a first half and a second half. The curvature of the first half is greater than the curvature of the second half. as well as A secondary lens comprises a first curved surface, a first surface, a second curved surface, a second surface, and an inclined plane connected end to end. The first curved surface serves as a refractive surface, and the second curved surface serves as a total reflection surface. The first curved surface is adjacent to and opposite to the second half of the curved surface. It passes through the intersection of the axis of symmetry and the tangent and has an angle between the perpendicular axis of the axis of symmetry and the tangent and the extension direction of the inclined plane. The angle is acute.

2. The light-emitting component according to claim 1, characterized in that, The light-emitting chip is located at the intersection of the axis of symmetry and the tangent, with the included angle being 12° to 18°.

3. The light-emitting component according to claim 1, characterized in that, Both the first surface and the second surface are planar, wherein the extension direction of the first surface and the extension direction of the second surface are both parallel to the axis of symmetry and perpendicular to the vertical axis.

4. The light-emitting component according to claim 3, characterized in that, The height of the light-emitting component in the direction of extension of the vertical axis is less than 12.4 mm, and the length of the secondary lens in the direction of extension of the axis of symmetry is less than the height of the secondary lens in the direction of extension of the vertical axis.

5. The light-emitting component according to claim 4, characterized in that, The height of the light-emitting component in the direction of extension of the vertical axis is 6mm, and the length of the secondary lens in the direction of extension of the axis of symmetry is 4mm.

6. The light-emitting component according to claim 1, characterized in that, The off-axis light source is an off-axis light source with an off-axis angle of 55°.

7. The light-emitting component according to claim 6, characterized in that, The x-axis is defined to be parallel to the axis of symmetry, the y-axis is defined to be parallel to the vertical axis, and the z-axis is defined to be parallel to the tangent. The first surface satisfies the formula: y = 14.613x 4 -84.518x 3 +181.1x 2 -172.14x+62.

781.

8. The light-emitting component according to claim 6, characterized in that, The x-axis is defined to be parallel to the axis of symmetry, the y-axis is defined to be parallel to the vertical axis, and the z-axis is defined to be parallel to the tangent. The second surface satisfies the formula: y = 1.1382x 3 -11.369x 2 +39.344x-45.

783.

9. The light-emitting component according to any one of claims 1 to 8, characterized in that, The second curved surface has two ends in the extension direction parallel to the vertical axis. When the secondary lens is made of silicone, the incident angle of the light emitted by the off-axis light source after passing through the first curved surface to the two ends is greater than 45°. When the secondary lens is made of glass, acrylic, or plastic, the incident angle of the light emitted by the off-axis light source after passing through the first curved surface to the two ends is greater than 40°.

10. A monitoring device, characterized in that, The monitoring device includes a light-emitting component as described in any one of claims 1 to 9, and the monitoring device is used to be installed on a wall adjacent to the monitoring area.

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