Photosensitive device with lens shared by photosensitive element and image sensor

Abstract

The utility model discloses a photosensitive device with a lens shared by a photosensitive element and an image sensor, which belongs to the technical field of security and protection lenses and mainly structurally comprises a printed circuit board (PCB), the photosensitive element and a lighting element, the photosensitive element is welded on the PCB, and the image sensor is welded and fixed on the PCB, the photosensitive element and the image sensor are located in the lens, and the lens is of a closed structure to prevent foreign matters and impurities from contacting the image sensor or the photosensitive element. And the lens is aligned with the PCB provided with the photosensitive element and the lighting element. The back face of the PCB is installed on the substrate, the photosensitive element and the lighting element are welded and fixed to the front face of the PCB, and the lighting element is electrically connected with the photosensitive element. In use, when the environment is gradually darkened, the radiation area and intensity of light penetrating through the lens are reduced, at the moment, the lighting element is powered on, and the light is gradually brightened along with the increase of the voltage loaded on the photosensitive element, so that the lighting effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of security lens, concretely relates to a photosensitive device of photosensitive element and image sensor share lens. BACKGROUND

[0002] In the field of security camera, photosensitive element is a necessary component. Photosensitive element is responsible for sensing, accepting light signal, and converting it into electrical signal, which can turn on the light compensation lamp under low brightness environment condition, and vice versa.

[0003] At present, when photosensitive element is used in smart home or security camera, the design scheme of opening hole light transmission on the shell is usually adopted, and this kind of design needs to open hole light transmission on the shell separately, which greatly affects the appearance of the product. Secondly, due to the opening of the shell, the product loses the ability of waterproof and dustproof. Once the dust or water vapor contacts the photosensitive element, the performance of the photosensitive element will decrease, and even the circuit will be short-circuited, which will cause the product to fail and cannot be used. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a photosensitive device of photosensitive element and image sensor share lens to solve the problem that the product fails and cannot be used due to the opening of the shell in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] The photosensitive device of photosensitive element and image sensor share lens disclosed by the utility model comprises:

[0007] PCB circuit board, the back surface is installed on the substrate, the front surface of the PCB circuit board is aligned with the lens, the lens is suitable for receiving external light and forming a focal point, and the lens forms a light transmission area on the PCB circuit board;

[0008] Photosensitive element, welded and fixed on the PCB circuit board, the PCB circuit board is welded with an image sensor, the image sensor is located on the focal point, and the photosensitive element is located in the light transmission area;

[0009] Illumination element, installed on the PCB circuit board and electrically connected with the photosensitive element;

[0010] Among them, the image sensor and the photosensitive element are located in the lens, the lens is a closed structure, the focal point is located on the image sensor, and the photosensitive element is located in the light transmission area.

[0011] Further, the photosensitive element is a photosensitive resistor, and the photosensitive element is arranged on the long side of the image sensor.

[0012] Further, the lens forms a light transmission area in the plane of the image sensor in a circular shape, and the light sensitive element is in a strip shape and arranged along the radial direction of the light transmission area.

[0013] Further, the light sensitive element is connected with a D / A converter circuit, and the D / A converter is adapted to convert the voltage analog signal on the light sensitive element into a digital signal.

[0014] The D / A converter is connected with a single chip microcomputer signal in a serial communication mode, and the single chip microcomputer is connected with the lighting element in a parallel communication mode.

[0015] Further, the lens is a super wide-angle lens.

[0016] Further, the light sensitive element is connected in series or in parallel with the lighting element.

[0017] Further, the image sensor is a CMOS light sensitive device, and the image sensor is installed with a photomultiplier tube.

[0018] Further, the lighting element is a single light emitter or an LED dot matrix composed of a plurality of LED small lights.

[0019] Further, the light sensitive element is connected in series with a potentiometer, and the light sensitive element and the potentiometer are connected into the D / A converter.

[0020] The utility model has the advantages of:

[0021] The light sensitive element and the image sensor share the lens of the light sensitive device, the image sensor and the light sensitive element are sealed in the lens, the lens is a closed structure, the problem of needing to open a hole for light transmission on the shell when using the light sensitive element is avoided, the shell structure design of the smart home and the security camera is optimized, the product appearance and the waterproof performance are improved. In addition, compared with the prior art, the light sensitive element layout structure design scheme of the technical scheme can further improve the space utilization rate of the internal components of the smart home or the security camera. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical scheme in the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can obtain other implementation drawings according to the provided drawings without creating creative labor.

[0023] The structure, proportion, size and the like shown in the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not have technical substantive significance, and any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0024] Figure 1 A photosensitive device with a lens shared by a photosensitive element and an image sensor according to the utility model is provided with a front view;

[0025] Figure 2 A lens side view provided by the utility model;

[0026] Figure 3 A lighting element front view provided by the utility model;

[0027] Figure 4 A light focusing schematic view provided by the utility model;

[0028] Figure 5 A single-chip microcomputer circuit connection schematic view provided by the utility model;

[0029] Figure 6 A lighting element structure schematic view provided by the utility model;

[0030] Figure 7 A D / A converter circuit connection schematic view provided by the utility model;

[0031] In the figure: 1 PCB circuit board; 2 base plate; 3 photosensitive element; 4 lens; 5 image sensor; 6 light transmission area; 7 focal point; 8 D / A converter; 9 single-chip microcomputer; 10 lighting element; 11 potentiometer. DETAILED DESCRIPTION

[0032] The embodiments of the utility model are described below by specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. Obviously, the described examples are part of the embodiments of the utility model, not all. Based on the examples in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Please refer to Figures 1-7The utility model discloses a photosensitive device of photosensitive element and image sensor share lens mainly structural including PCB circuit board 1, photosensitive element 3 and lighting element 10, photosensitive element 3 is welded on PCB circuit board 1, and the image sensor 5 of welding fixed has on PCB circuit board 1, wherein, photosensitive element 3 and image sensor 5 are located in lens 4, and lens 4 is closed structure to prevent foreign matter impurity contact image sensor 5 or photosensitive element 3. And lens 4 is aligned with the PCB circuit board 1 of installing photosensitive element 3 and lighting element 10. And the back of PCB circuit board 1 is installed on the substrate 2, and the front of PCB circuit board 1 is welded and fixed with photosensitive element 3 and lighting element 10, and lighting element 10 is electrically connected with photosensitive element 3. In this embodiment, lens 4 is super wide-angle lens or fish eye lens, so as to obtain wider field of view.

[0034] In this embodiment, lens 4 is suitable for receiving external light and forming a focal point 7, and lens 4 forms a light transmission area 6 on the PCB circuit board 1, and the image sensor 5 is located on the focal point 7, and the photosensitive element 3 is located in the light transmission area 6. Specifically, the light transmission area 6 formed by the lens on the plane of the image sensor is circular, and the photosensitive element 3 is arranged on the long side of the image sensor and located in the light transmission area. In this embodiment, the photosensitive element 3 is a photosensitive resistor, and because the image sensor 5 is rectangular, the photosensitive element 3 is placed on the long side of the image sensor 5 and also in the light transmission area 6. Because the light intensity in the light transmission area 6 decreases towards the edge, the photosensitive element 3 can obtain the attenuated light signal. By adding a compensation amount to the data read by the photosensitive element, the actual light information of the current environment can be obtained.

[0035] Optionally, on the basis of the previous embodiment, the photosensitive element 3 is strip-shaped. When the energy of the light source decays, the frequency of the light emitted by the light source will also decrease. This will cause the wavelength in the chromatogram to become longer and move towards the red direction. Doppler redshift is a phenomenon that the wavelength of light is lengthened due to the distance of the light source, so that the photosensitive element 3 is arranged along the radial direction of the light transmission area 6, which can offset the light on the surface of the photosensitive element 3, thereby increasing the resistance change range of the photosensitive element 3, reducing noise, and improving the accuracy of the actual light information of the current environment obtained.

[0036] In some embodiments, the photosensitive element 3 is electrically connected with a D / A converter 8, and the D / A converter 8 is suitable for converting the voltage analog signal on the photosensitive element 3 into a digital signal. Specifically, the D / A converter 8 is connected with a single-chip microcomputer 9 in a serial communication mode, and the single-chip microcomputer 9 is connected with the lighting element 10 in a parallel communication mode. Thus, the brightness of the lighting element 10 is adjusted by the single-chip microcomputer 9.

[0037] In the previous embodiment, the lighting element 10 is composed of a LED dot matrix formed by a plurality of LED small lights. Figure 6 Wherein, the pin on the single-chip microcomputer 9 drives the LED dot matrix to emit light through a triode, and the single-chip microcomputer 9 can control the number of light-emitting small lights in the LED dot matrix by controlling the number of pins outputting high level. Optionally, the photosensitive element 3 can also be connected in series or parallel with a single LED lamp bead, and the brightness of the LED lamp bead is controlled by using the series resistance voltage division and parallel resistance current division, so as to adjust the lighting brightness.

[0038] In some embodiments, since the resistance of the photosensitive element 3 changes when it is illuminated, the photosensitive element 3 and the potentiometer 11 are connected in series, and the photosensitive element 3 and the potentiometer 11 are connected to the D / A converter 8. In the embodiment, the total voltage on the photosensitive element 3 and the potentiometer 11 is manually adjusted to change the total voltage, and the total voltage analog quantity is input into the single-chip microcomputer 9 through the D / A converter 8, so as to manually adjust the lighting brightness.

[0039] In some embodiments, the image sensor 5 is a CMOS photosensitive device, and the image sensor 5 is installed with a photomultiplier tube. The photomultiplier tube can capture and amplify the faint light information and emit it to the CMOS photosensitive device, so as to make the image sensor 5 obtain more video information in dim conditions.

[0040] Although the utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model, all belong to the scope of the utility model claimed.

Claims

1. A photosensitive device in which a photosensitive element and an image sensor share a lens, characterized in that, The application relates to a camera, comprising: a PCB circuit board (1) mounted on a substrate (2) with its front face aligned with a lens (4) adapted to receive external light and form a focal point (7), the lens (4) forming a light transmission area (6) on the PCB circuit board (1); a photosensitive element (3) welded on the PCB circuit board (1), the PCB circuit board (1) being welded with an image sensor (5) located at the focal point (7), the photosensitive element (3) being located in the light transmission area (6); an illuminating element (10) mounted on the PCB circuit board (1) and electrically connected with the photosensitive element (3); wherein the image sensor (5) and the photosensitive element (3) are both located in the lens (4), the lens (4) is a closed structure, the focal point (7) is located on the image sensor (5), and the photosensitive element (3) is located in the light transmission area (6).

2. The light-sensing apparatus according to claim 1, wherein the photosensitive element and the image sensor share a lens. The photosensitive element (3) is a photosensitive resistor arranged on the long side of the image sensor.

3. The light-sensing apparatus according to claim 2, wherein the light-sensing apparatus is configured to perform the image pickup operation and the light-sensing operation simultaneously. The light transmission area (6) formed by the lens (4) on the plane of the image sensor (5) is circular, the photosensitive element (3) is strip-shaped and arranged along the radial direction of the light transmission area (6).

4. The light-sensing apparatus according to claim 3, wherein the light-sensing apparatus is configured to perform the image pickup operation and the light-sensing operation simultaneously. The photosensitive element (3) is circuit-connected with a D / A converter (8) adapted to convert the voltage analog signal on the photosensitive element (3) into a digital signal. The D / A converter (8) is signal-connected with a single-chip microcomputer (9) in a serial communication mode, and the single-chip microcomputer (9) is connected with the illuminating element (10) in a parallel communication mode.

5. The light-sensing apparatus according to claim 1, wherein the photosensitive element and the image sensor share a lens. The lens (4) is a super-wide-angle lens.

6. The light-sensing apparatus according to claim 2, wherein the photosensitive element and the image sensor share a lens. The photosensitive element (3) is connected in series or parallel with the illuminating element (10).

7. The light-sensing apparatus according to claim 2, wherein the photosensitive element and the image sensor share a lens. The image sensor (5) is a CMOS photosensitive device, and the image sensor (5) is mounted with a photomultiplier tube.

8. The light-sensing apparatus according to claim 4 or 6, wherein the photosensitive element and the image sensor share a lens. The illuminating element (10) is a single light-emitting body or an LED dot matrix composed of multiple LED small lights.

9. The light-sensing apparatus according to claim 4, wherein the light-sensing apparatus is configured to perform the image pickup operation and the light-sensing operation simultaneously. The photosensitive element (3) is connected in series with a potentiometer (11), and the photosensitive element (3) and the potentiometer (11) are connected in the D / A converter (8).

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