TWI806074B - Camera and light adjustment module - Google Patents

Abstract

A light adjustment module for a camera includes a light source unit and a light adjustment unit. The light source unit includes a plurality of light emitting elements disposed around a lens of the camera, and the light direction of each of the light emitting elements is parallel to the image capturing direction of the lens. The light adjustment unit is disposed on the light source unit and includes a plurality of secondary optical elements, and these secondary optical elements respectively correspond to the light emitting elements. The light emitted by each of light emitting elements is deflected via the corresponding secondary optical element. Wherein, each of the secondary optical elements includes a first ring-shaped prism and a second ring-shaped prism, the width of the second ring-shaped prism is greater than the width of the first ring-shaped prism, and the second ring-shaped prism surrounds the outer circumference of the first ring-shaped prism.

Description

Camera and dimming module

The present invention relates to an electronic device, in particular to a camera and a dimming module.

Many cameras are equipped with a light source as auxiliary lighting, so that the camera can obtain a clearer image through the light source illumination when capturing images, and it can also have sufficient brightness for shooting at night or in low-light environments.

In order to allow the light source to shine on a specific area or angle, the light source of the camera generally uses a plug-in type light-emitting element (such as DIP LED) with pins. During the manufacturing process of the camera, the pins of the plug-in type light-emitting On the circuit board, after being turned by bending the pins and fixed by soldering, the plug-in type light-emitting element can be directed at a specific angle to illuminate a specific area.

However, the above-mentioned method is not only complicated and time-consuming (for example, each light-emitting element needs to be bent), but also prone to errors through the way of bending the pins, so that the desired lighting effect cannot be achieved. In addition, the light irradiated by the insert-type light-emitting element on a specific area may also be uneven. For example, the light that is farther away from the insert-type light-emitting element will diverge more, resulting in poor lighting effect and affecting image quality.

In view of the above, in one embodiment, a dimming module for a camera is provided, which is suitable for a video camera, and the dimming module for the camera includes a light source unit and a dimming unit. The light source unit includes a plurality of light-emitting elements, which are arranged around the camera lens of the camera, and the light-emitting direction of each light-emitting element is parallel to the image-taking direction of the camera lens. The dimming unit is arranged on the light source unit and includes a plurality of secondary optical elements corresponding to a plurality of light emitting elements. The light emitted by each light-emitting element is deflected by the corresponding secondary optical element. Wherein each secondary optical element comprises a first annular 稜 and a second annular 珡, the width of the second annular 稜 is greater than the width of the first annular 稜, and the second annular 稜 surrounds the first Periphery of the ring-shaped eel.

In another embodiment, a camera is provided, including a camera body and the above-mentioned dimming module. The camera body has a camera lens. The dimming module is arranged in the camera body.

Thus, according to the dimming module of the camera according to the embodiment of the present invention, each secondary optical element passing through the dimming unit corresponds to each light-emitting element, and the light emitted by each light-emitting element can pass through the corresponding secondary optical element to generate The deflection enables the dimming unit to guide the light of each light-emitting element to achieve the required illumination angle and intensity distribution, so as to optimize the uniformity of illumination and improve the quality of image capture. In addition, each light-emitting element does not require additional processing (such as bending pins to turn), which greatly reduces labor and time costs.

Various embodiments are proposed below for detailed description. However, the embodiments are only used as examples for illustration and will not limit the scope of protection of the present invention. In addition, some components are omitted from the drawings in the embodiments to clearly show the technical characteristics of the present invention. The same reference numbers will be used throughout the drawings to refer to the same or similar elements.

FIG. 1 is a perspective view of an embodiment of the camera of the present invention, FIG. 2 is a perspective view of the first embodiment of the dimming module of the present invention, and FIG. 3 is an exploded perspective view of the first embodiment of the dimming module of the present invention. As shown in FIG. 1 , the camera 1 of this embodiment includes a dimming module 2 and a camera body 3 . In some embodiments, the camera 1 may be an IP Camera/Network Camera, a Closed-Circuit Television (CCTV), or an analog surveillance camera. The camera 1 can be installed in various places (such as nurseries, offices, shops, highways, etc.) for security monitoring or recording personnel activities.

As shown in Figures 1 to 3, the camera body 3 includes a casing 30 and a camera lens 32, the casing 30 is a hollow shell and has a camera port 31, the camera lens 32 is located in the casing 30 and faces the camera Mouth 31. External light can enter the interior of the casing 30 through the camera port 31 , so that the camera lens 32 can capture external images. The dimming module 2 is installed on the casing 30 and includes the light source unit 10 and the dimming unit 20 . The light source unit 10 includes a substrate 14 and a plurality of light emitting elements 15 disposed around the camera lens 32 , wherein the substrate 14 includes a first surface 11 and a second surface 12 opposite to each other. In this embodiment, the substrate 14 is a circuit board, and each light-emitting element 15 is a light-emitting diode (LED) fixed on the first surface 11 .

As shown in FIGS. 1 to 3 , in this embodiment, the normal direction of the first surface 11 of the substrate 14 is parallel to the imaging direction of the imaging lens 32 (such as the Y-axis direction shown in FIGS. 3 and 5 ). , so that the light emitting direction of each light emitting element 15 is parallel to the image capturing direction of the imaging lens 32 . Those skilled in the art can understand that the light emitting direction of the light emitting element 15 is also the direction of the maximum light intensity of the light emitting element 15 . In this embodiment, the number of the plurality of light emitting elements 15 is four, but this is not limited, and the number of light emitting elements 15 can also be configured in different ways according to implementation requirements.

As shown in FIG. 3 , the base plate 14 has a lens installation area 13 for mounting a camera lens 32 . In this embodiment, the lens installation area 13 is a central opening for the camera lens 32 to pass through, so as to prevent the camera lens 32 from being blocked and capture external images, but this is not limited thereto. In some embodiments, the lens installation area 13 of the substrate 14 can also be a solid area for the camera lens 32 to be directly assembled and facing the camera port 31 .

As shown in Figures 2 and 3, the camera lens 32 has a normal center axis N (in this embodiment, the axial direction of the normal center axis N is parallel to the Y-axis direction in Figures 2 to 3), the camera lens The imaging direction of 32 is the axial direction of the normal central axis N. The plurality of light-emitting elements 15 are arranged equidistantly around the normal central axis N, that is to say, the shortest distances from each light-emitting element 15 to the normal central axis N are the same, but this embodiment is not limited thereto. In some embodiments, the positions of the plurality of light-emitting elements 15 can be configured differently according to actual needs. For example, the plurality of light-emitting elements 15 can be arranged on the same side of the lens installation area 13, and the plurality of light-emitting elements 15 can be arranged with the normal central axis N The center is arranged at an equal angle (for example, 30°, 45° or 60°) or a plurality of light emitting elements 15 may also be arranged in an irregular manner.

Fig. 4 is a perspective view of the first embodiment of the secondary optical component of the present invention, Fig. 5 is a side view of the first embodiment of the dimming module of the present invention, and Fig. 6 is a segment of the dimming module of the present invention along line 6-6 in Fig. 5 Figure 7 is a partial enlarged view of Figure 6. As shown in FIG. 2 to FIG. 7 , the dimming unit 20 is arranged on the light source unit 10 and includes a plurality of secondary optical components 21, and the multiple secondary optical components 21 respectively correspond to a plurality of light emitting components 15, as shown in FIG. 4 , Each secondary optical element 21 includes a transparent substrate 28 made of transparent material, such as polycarbonate (PC), acrylic plastic (PMMA) or glass material. In some embodiments, the dimming unit 20 and the light source unit 10 are arranged side by side in the imaging direction of the camera lens 32 , and the dimming unit 20 is located in front of the light source unit 10 .

As shown in FIGS. 3 and 4 , the transparent substrate 28 of each secondary optical element 21 has a light-receiving surface 281 facing each light emitting element 15, and each secondary optical element 21 further includes a plurality of ring-shaped plates (here, the first One ring-shaped scorpion 22 and the second ring-shaped scorpion 24, but the number of ring-shaped scorpions can also be more than three, depending on the demand of the product, this is not limited), and multiple ring-shaped scorpions are arranged on On the light-receiving surface 281 , the widths of each ring-shaped horn are different and concentric with each other. As shown in FIG. 4 , in this embodiment, the width of the second annular scorpion 24 is greater than the width of the first annular scorpion 22 , and the second annular scorpion 24 surrounds and connects to the first annular scorpion. 22 perimeter.

In some embodiments, the above-mentioned first ring-shaped sputum 22 and the second ring-shaped scorpion 24 may be in the shape of a ring, a square ring, an ellipse or other rings. As shown in Fig. 4, in this embodiment, the first annular sputum 22 and the second annular scorpion 24 are annular, and the diameter of the second annular scorpion 24 is larger than that of the first annular scorpion 22. diameter, and the second ring-shaped scorpion 24 surrounds and connects to the outer periphery of the first ring-shaped scorpion 22.

As shown in Figures 4 and 7, in this embodiment, the transparent substrate 28 of each secondary optical element 21 has a central axis C, and the first ring-shaped 22 is adjacent to the center of the second ring-shaped 24. Axis C, and the first annular scorpion 22 and the second annular scorpion 24 are arranged concentrically with respect to the central axis C. In addition, the cross-section of the first annular ring 22 of each secondary optical element 21 is tooth-shaped and includes two first tooth portions 23, and the two first tooth portions 23 are respectively located on opposite sides of the central axis C, wherein The cross section of each first tooth portion 23 can be triangular, quadrangular, polygonal or other irregular shapes. The cross-section of the second annular scorpion 24 is also tooth-shaped and includes two second tooth portions 25, and the two second tooth portions 25 are respectively adjacent to the two first tooth portions 23, wherein the cross-section of each second tooth portion 25 It can also be triangular, quadrangular, polygonal or other irregular shapes. In some embodiments, the shape of each first tooth portion 23 and the shape of each second tooth portion 25 may be the same or different.

In this way, the light emitted by each light-emitting element 15 can be deflected by a plurality of rings on the corresponding secondary optical element 21, so that the light emitted by the light-emitting element 15 can be guided by each secondary optical element 21. To achieve the required irradiation angle and position. For example, the configuration of multiple ring-shaped reticles of each secondary optical element 21 can guide the light emitted by each light-emitting element 15 to irradiate only a specific area and position of the imaging range of the camera 1, for example, guide the light to only irradiate In one of the quadrants of the imaging range of the camera 1; or, each secondary optical element 21 can also guide the light emitted by each light emitting element 15, so that the overall brightness of the imaging range of the camera 1 is uniform and the quality of image capture is greatly improved. .

In addition, the embodiment of the present invention controls light illumination through the way that each secondary optical element 21 of the dimming unit 20 corresponds to the exterior of each light-emitting element 15, so that each light-emitting element 15 does not need additional processing (such as bending pin steering). For example, as shown in FIG. 6 and FIG. 7 , each light-emitting element 15 of this embodiment can adopt a surface mount type (Surface Mounted Technology) LED, so that each light-emitting element 15 can be quickly mounted on the first surface 11 of the substrate 14 through an automatic machine. On the one hand, to achieve a significant reduction in manpower and time costs.

As shown in Figures 2 to 7, the dimming unit 20 also includes a transparent cover 29, the transparent cover 29 is arranged on one side of the first surface 11 of the substrate 14 and covers the plurality of light-emitting elements 15, the transparent cover 29 can be provided with A plurality of holes 291, and a plurality of secondary optical elements 21 are respectively fixed in the plurality of holes 291, and a plurality of secondary optical elements 21 are arranged equidistantly around the normal central axis N, for example, each secondary optical element 21 can transmit Fix in each hole 291 by means of adhesion, buckle or ultrasonic welding. In some embodiments, the transparent cover 29 and the plurality of secondary optical components 21 may also be integrally formed (for example, the transparent cover 29 and each secondary optical component 21 are integrally injection-molded).

In some embodiments, the above-mentioned transparent cover 29 is made of a transparent material, such as polycarbonate (PC), acrylic plastic (PMMA) or glass material, so that the light emitted by each light-emitting element 15 can be The transparent cover 29 penetrates and shines outward from the camera port 31 to achieve the effect of auxiliary lighting.

In some embodiments, the above-mentioned multiple ring-shaped apertures of the secondary optical elements 21 can pass through configurations of different shapes or numbers, so that the light emitted by the light-emitting element 15 can achieve different refraction effects to meet different requirements for irradiation angles and positions. Alternatively, a plurality of secondary optical elements 21 can also be arranged through different inclination angles, so that the light emitted by the light emitting element 15 can achieve different refraction effects to meet different requirements of illumination angles and positions, which are described below with reference to the drawings.

For example, at least two of the multiple secondary optical elements 21 of the dimming unit 20 can be set to different inclination angles or each secondary optical element 21 of the dimming unit 20 can be set to a different inclination angle, so that The light emitted by each light-emitting element 15 produces different refraction effects according to different requirements. For example, as shown in FIG. 2 , FIG. 3 and FIG. 6 , in this embodiment, the number of secondary optical elements 21 of the dimming unit 20 is four, and the inclination angles of the four secondary optical elements 21 are all different to correspond to At different positions of the imaging range of the camera 1 (for example, corresponding to different quadrants of the imaging range of the camera 1 ), light rays emitted by guiding multiple light emitting elements 15 are respectively irradiated on different positions of the imaging range of the camera 1 .

As shown in Figure 4 and Figure 7, the first tooth portion 23 of the first annular scorpion 22 and the second tooth portion 25 of the second annular scorpion 24 can be configured in different shapes, so that the light emitting element 15 emits Light achieves different refraction effects to meet different needs. For example, in this embodiment, the cross-section of the first tooth part 23 of the first ring-shaped reel 22 is a triangle, and the cross-section of the second tooth part 25 of the second ring-shaped reel 24 is a quadrilateral, forming a first ring shape. The shape of the first tooth portion 23 of the ring 22 is different from the shape of the second tooth portion 25 of the second annular ring 24 .

As shown in Figure 7 again, the first tooth portion 23 of the first ring-shaped scorpion 22 has a first tooth width W1, wherein the first tooth width W1 can refer to the maximum width of the first tooth portion 23, the second ring The second tooth portion 25 of the shape 24 has a second tooth width W2, wherein the second tooth width W2 may refer to the maximum width of the second tooth portion 25. In this embodiment, the first tooth width W1 is smaller than the second tooth width W1. Two tooth widths W2 make the shape of the first tooth portion 23 of the first ring-shaped reel 22 different from the shape of the second tooth portion 25 of the second ring-shaped reel 24 . In some embodiments, the first tooth width W1 of the first tooth portion 23 may also be the same as the second tooth width W2 of the second tooth portion 25 , which is not limited.

As shown in Figure 8, it is a cross-sectional view of the second embodiment of the secondary optical element of the present invention. The difference between this embodiment and the above-mentioned first embodiment is at least that the secondary optical element 21a of this embodiment includes more than three annular In addition, the tooth widths of the plurality of ring-shaped rings gradually decrease from the central axis C toward the periphery, that is, the tooth widths of ring-shaped rings that are farther away from the central axis C become smaller. Specifically, taking the first ring-shaped bell 22a, the second ring-shaped bell 24a, and the third ring-shaped bell 26a in the secondary optical element 21a as an example, the first ring-shaped bell 22a is closest to the central axis C, the width of the second annular sputum 24a is greater than the width of the first annular sputum 22a, the width of the third annular sputum 26a is greater than the width of the second annular scorpion 24a, and the second annular scorpion 24a Surrounding and connecting to the outer periphery of the first annular scorpion 22a, the third annular scepter 26a surrounding and connecting to the outer periphery of the second annular scorpion 24a, the arrangement of other annular scallops of each secondary optical part 21 By analogy, it will not be repeated here.

In addition, as shown in FIG. 8 , the first tooth width W1a of each first tooth portion 23a of the first ring-shaped reel 22a is larger than the second tooth width W2a of each second tooth portion 25a of the second ring-shaped reel 24a, The second tooth width W2a of each second tooth portion 25a of the second annular scallop 24a is greater than the third tooth width W3a of each third tooth portion 27a of the third annular scorpion 26a, constituting the first tooth portion 23a, the second The shapes of the second tooth portion 25 a and the third tooth portion 27 a are different, and the tooth width of the ring-shaped scallop is smaller the farther away from the central axis C. Thereby, the secondary optical element 21a of the second embodiment is different from the secondary optical element 21 of the above-mentioned first embodiment in terms of the number, shape and tooth width of the annular rings, so that the light-emitting element can be The light emitted by 15 achieves another different refraction effect to meet different irradiation angles and positions.

As shown in Figure 9, it is a cross-sectional view of the third embodiment of the secondary optical element of the present invention. The difference between this embodiment and the above-mentioned first and second embodiments is at least that the secondary optical element 21b of this embodiment includes three rings The tooth widths of the three rings gradually increase from the central axis C toward the periphery. Larger, that is to say, the farther away from the central axis C, the wider the tooth width of the annular ring. Specifically, in this embodiment, the first annular sputum 22b is closest to the central axis C, the width of the second annular scorpion 24b is greater than the width of the first annular scorpion 22b, and the third annular scorpion 26b The width is greater than the width of the second ring-shaped scorpion 24b, the second ring-shaped scorpion 24b surrounds and connects to the outer periphery of the first ring-shaped scorpion 22b, and the third ring-shaped scorpion 26b surrounds and connects to the second ring-shaped ridge The periphery of the mirror 24b. In addition, the first tooth width W1b of each first tooth portion 23b of the first annular scallop 22b is smaller than the second tooth width W2b of each second tooth portion 25b of the second annular scallop 24b. The second tooth width W2b of each second tooth portion 25b of 24b is smaller than the third tooth width W3b of each third tooth portion 27b of the third annular ring 26b, constituting the first tooth portion 23b, the second tooth portion 25b and the first tooth portion 23b. The shapes of the three teeth portions 27b are all different, and the tooth widths of the ring-shaped teeth that are farther away from the central axis C are larger. In this way, compared with the above-mentioned first and second embodiments, the secondary optical element 21b of the third embodiment is different in the number, shape and tooth width of the ring-shaped reticles, so that the light emitted by the light-emitting element 15 can be The light achieves another different refraction effect to meet the different requirements of the irradiation angle and position.

As shown in Figure 10, it is a cross-sectional view of the fourth embodiment of the secondary optical element of the present invention. The difference between this embodiment and the above-mentioned first to third embodiments is at least that the secondary optical element 21c of this embodiment includes three annular稜鏡 (the first annular 稜鏡 22c, the second annular 樜菡 24c and the third annular 樜鏡 26c), and the tooth heights of the three annular 稜鏡 are all different, here the three annular 稜鏡The tooth height gradually increases from the central axis C toward the periphery, that is to say, the farther away from the central axis C, the greater the tooth height of the ring-shaped reel. The maximum height of the light-receiving surface 281 of the substrate 28 .

As shown in Fig. 10, in this embodiment, the first annular rib 22c is closest to the central axis C, the width of the second annular rib 24c is greater than the width of the first annular rib 22c, and the third annular rib The width of the mirror 26c is greater than the width of the second ring-shaped scorpion 24c, the second ring-shaped scorpion 24c surrounds and connects to the outer periphery of the first ring-shaped scorpion 22c, and the third ring-shaped scorpion 26c surrounds and connects to the second ring Periphery of 24c. In addition, the first tooth height H1 of each first tooth portion 23c of the first annular scallop 22c is smaller than the second tooth height H2 of each second tooth portion 25c of the second annular scallop 24c, and the second annular scorpion 24c The second tooth height H2 of each second tooth portion 25c of 24c is smaller than the third tooth height H3 of each third tooth portion 27c of the third annular ring 26c, constituting the first tooth portion 23c, the second tooth portion 25c and the second tooth portion 23c. The shapes of the three tooth parts 27c are all different, and the tooth heights of the ring-shaped teeth are larger the farther away from the central axis C. In this way, compared with the above-mentioned first to third embodiments, the secondary optical element 21c of the fourth embodiment has different shapes and tooth heights of the ring-shaped horn, so that the light emitted by the light-emitting element 15 can reach Another different refraction effect to meet different lighting angles and positions.

As shown in Figure 11, it is a cross-sectional view of the fifth embodiment of the secondary optical element of the present invention. The difference between this embodiment and the above-mentioned first to fourth embodiments is at least that the secondary optical element 21d of this embodiment includes three rings shape (the first ring shape 22d, the second ring shape 24d and the third ring shape 26d), wherein the first tooth part 23d of the first ring shape 22d has a first side 233 (in The first side 233 is a side of the first tooth portion 23 d away from the central axis C, but it can also be a side close to the central axis C, which is not limited). The second tooth part 25d of the second ring-shaped 24d has a second side 253 (herein the second side 253 is the side of the second tooth part 25d away from the central axis C, but it can also be a side close to the central axis C, This is not limited), the third tooth portion 27d of the third ring-shaped 26d has a third side 273 (the third side 273 is the side of the third tooth portion 27d away from the central axis C, but it can also be close to The side of the central axis C, this is not limited), and the curvature of the first side 233 , the curvature of the second side 253 and the curvature of the third side 273 are all different. In this way, compared with the above-mentioned first to fourth embodiments, the secondary optical element 21d of the fifth embodiment has a different shape and curvature of the ring shape, so that the light emitted by the light-emitting element 15 can reach another level. A different refraction effect to meet different lighting angles and positions.

As shown in Figure 12, it is a cross-sectional view of the sixth embodiment of the secondary optical element of the present invention. The difference between this embodiment and the above-mentioned first to fifth embodiments is at least that the secondary optical element 21e of this embodiment includes three rings shape (the first ring-shaped ring 22e, the second ring-shaped ring 24e and the third ring-shaped ring 26e), wherein each first tooth part 23e of the first ring-shaped ring 22e, the second ring-shaped rib Each second tooth portion 25e of the mirror 24e and each third tooth portion 27e of the third ring-shaped rim 26e are all different in tooth width, tooth height and side curvature, and constitute the first tooth portion 23e and the second tooth portion 23e. part 25e and the third tooth part 27e are different in shape, and the shape of the secondary optical element 21e is also different from the above-mentioned first to fifth embodiments, so this embodiment can be compared with the above-mentioned first to fifth embodiments. The light emitted by the light-emitting element 15 achieves another different refraction effect to meet different requirements of irradiation angles and positions.

To sum up, the dimming module of the camera according to the embodiment of the present invention, through the different shape changes of the multiple ring-shaped reels on each secondary optical element (for example, adjusting the tooth width, tooth height and side surface of the multiple ring-shaped reels) at least one of the curvature), so that the dimming unit can guide the light of each light-emitting part to achieve different required irradiation angles and intensity distributions, without additional processing of the light-emitting parts (such as bending pins to turn).

Although the technical content of the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any modification and modification made by those skilled in the art without departing from the spirit of the present invention should be covered by the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

1: camera 2: Dimming module 3: Camera body 10: Light source unit 11: First surface 12: Second surface 13: Lens setting area 14: Substrate 15: Luminous parts 20: Dimming unit 21. 21a～21e: secondary optics 22, 22a～22e: the first ring-shaped scorpion 23, 23a～23e: the first tooth part W1, W1a, W1b: first tooth width H1: first tooth height 233: first side 24, 24a～24e: the second ring-shaped scorpion 25, 25a～25e: the second tooth part W2, W2a, W2b: second tooth width H2: second tooth height 253: second side 26a～26e: The third ring-shaped scorpion 27a～27e: the third tooth part W3a, W3b: third tooth width H3: third tooth height 273: The third side 28: Transparent substrate 281: Light-receiving surface 29: Transparent cover 291: hole 30: Chassis 31: camera port 32: camera lens C: central axis N: Normal central axis

[Fig. 1] is a perspective view of an embodiment of the camera of the present invention. [Fig. 2] is a perspective view of the first embodiment of the dimming module of the present invention. [Fig. 3] is an exploded perspective view of the first embodiment of the dimming module of the present invention. [Fig. 4] is a perspective view of the first embodiment of the secondary optical element of the present invention. [Fig. 5] is a side view of the first embodiment of the dimming module of the present invention. [Fig. 6] is a schematic cross-sectional view of the dimming module of the present invention along line 6-6 in Fig. 5. [Fig. 7] is a partially enlarged view of Fig. 6. [ Fig. 8 ] is a cross-sectional view of the second embodiment of the secondary optical element of the present invention. [ Fig. 9 ] is a cross-sectional view of the third embodiment of the secondary optical element of the present invention. [Fig. 10] is a sectional view of the fourth embodiment of the secondary optical element of the present invention. [Fig. 11] is a sectional view of the fifth embodiment of the secondary optical element of the present invention. [Fig. 12] is a sectional view of the sixth embodiment of the secondary optical element of the present invention.

2: Dimming module

10: Light source unit

11: First surface

12: Second surface

13: Lens setting area

14: Substrate

15: Luminous parts

20: Dimming unit

21:Secondary optics

29: Transparent cover

291: hole

32: camera lens

N: Normal central axis

Claims (13)

A dimming module for a video camera, suitable for a video camera, the dimming module of the video camera includes: a light source unit, including a plurality of light-emitting elements, the light-emitting elements are arranged around a camera lens of the video camera, and each of the light-emitting elements The light-emitting direction of the light-emitting element is parallel to the image-taking direction of the camera lens; and a dimming unit is arranged on the light source unit and includes a plurality of secondary optical elements, and these secondary optical elements correspond to the light-emitting elements respectively, and The light emitted by each light-emitting element is deflected by the corresponding secondary optical element; wherein, each of the secondary optical elements includes a first annular prism and a second annular prism, and the second annular prism The width of the mirror is greater than the width of the first annular reel, and the second annular reel surrounds the outer periphery of the first annular reel, and at least two of the secondary optical elements have different inclination angles respectively . The dimming module of the camera as described in Claim 1, wherein each of the secondary optical elements includes a transparent substrate, and the transparent substrate has a light-receiving surface facing each of the light-emitting elements, the first ring-shaped reed and the second The two rings are arranged on the light-receiving surface. The dimming module of the camera as described in claim 2, wherein the section of the first ring-shaped reel is tooth-shaped and includes a first tooth portion, and the cross-section of the second ring-shaped reel is tooth-shaped and A second tooth adjacent to the first tooth is included. The dimming module of the camera according to claim 3, wherein the shape of the first tooth portion is different from the shape of the second tooth portion. The camera dimming module according to claim 4, wherein the first tooth portion has a first tooth width, the second tooth portion has a second tooth width, and the first tooth width is different from the second tooth Width. The dimming module of the camera according to claim 5, wherein the transparent substrate has a central axis, the first ring-shaped reed is adjacent to the central axis relative to the second ring-shaped reed, and the first teeth are wider at the second tooth width. The dimming module for a camera as described in claim 5, wherein the transparent substrate has a central axis, the first ring-shaped reed is adjacent to the central axis relative to the second ring-shaped reed, and the first tooth width less than the second tooth width. The camera dimming module according to claim 4, wherein the first tooth portion has a first tooth height, the second tooth portion has a second tooth height, and the first tooth height is different from the second tooth height high. The dimming module of the camera according to claim 8, wherein the transparent substrate has a central axis, the first ring-shaped reed is adjacent to the central axis relative to the second ring-shaped reed, and the first tooth height less than the second tooth height. The camera dimming module according to claim 4, wherein the first tooth portion has a first side surface, the second tooth portion has a second side surface, and the curvature of the first side surface is different from that of the second side surface curvature. The dimming module of the camera according to claim 3, wherein each of the secondary optical elements includes a third annular reel, and the width of the third annular reel is greater than the width of the second annular reel, And the third ring-shaped scorpion surrounds the outer periphery of the second ring-shaped scorpion, and the cross-section of the third ring-shaped scorpion is tooth-shaped and includes a third tooth portion adjacent to the second tooth portion. The camera dimming module according to claim 11, wherein the shape of the first tooth portion, the shape of the second tooth portion, and the shape of the third tooth portion are different. A camera, comprising: a camera body with a camera lens; and the dimming module according to any one of Claims 1 to 12, the dimming module is arranged in the camera body.

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