CN109870866B - Light source safety device - Google Patents
Light source safety device Download PDFInfo
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- CN109870866B CN109870866B CN201910303867.7A CN201910303867A CN109870866B CN 109870866 B CN109870866 B CN 109870866B CN 201910303867 A CN201910303867 A CN 201910303867A CN 109870866 B CN109870866 B CN 109870866B
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- light source
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- circuit board
- metal elastic
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Abstract
The invention provides a light source safety device, wherein two symmetrical metal elastic elements are arranged in a base, a circuit board is arranged at the bottom of the base, one end of each metal elastic element is welded and fixed on the circuit board, the other end of each metal elastic element is exposed out of the top end of the base, and a light source element is arranged between the two metal elastic elements. The installation seat is arranged on the base, a metal loop element is arranged in the installation seat and is abutted against two metal elastic elements exposed out of the top end of the base to form a conducting loop, an optical diffraction element is arranged on the installation seat, the optical diffraction element and the metal loop element form signal connection by using glue dispensing, whether a circuit breaking problem exists or not can be detected, and the light source can be immediately turned off, so that the safety of the light source is improved.
Description
Technical Field
The present invention relates to a light source safety device, which is a light source safety device capable of turning off the light source in real time according to the open circuit phenomenon caused by the displacement of the optical diffraction element.
Background
With the progress of science and technology, more and more electronic products have multifunctional, miniaturized and high-precision designs. In our lives, photographing and photographing functions are indispensable for electronic devices (such as camera systems, handheld devices, and medical detection devices), and these electronic products are equipped with a camera device having a plurality of camera units to provide a wide range of photographing functions for obtaining good image quality and image effect. For example, by combining the camera units with different characteristics and matching with different calculation functions, the camera device with different functions can be formed, for example, the camera device can capture three-dimensional images, and can be applied to the purposes of three-dimensional modeling, motion recognition and the like.
With the light source design of the conventional depth camera, the mobile phone can sense the actual distance between the device and the object in the lens by mounting the infrared illuminator, the infrared camera lens and the 1600 ten thousand pixel RGB camera lens. The technical principle of light source design is that an infrared illuminator emits light sources, light paths are parallel through a quasi-diameter lens, then a Diffraction Optical Element (DOE) is used for enabling the light sources to obtain light spots after diffraction, the light spots are shot on the surface of an object, the positions of the light spots are shot through another infrared camera, and depth information is calculated through an algorithm. Because of the external environment, infrared light (940nm) is selected as the preferred light source, and the infrared light is light which cannot be detected by naked eyes of human beings, so that the light is harmful to human bodies when the light is directly irradiated on the human bodies without diffraction.
For the safety switch design of the existing depth camera, besides the connection of the point silver paste on the circuit board under the DOE, the LDS (technology) using the material itself as the circuit is also provided, which is all for the purpose of detecting whether the DOE element is still at the original position, if not, the safety device will turn off the light source to avoid the injury to the human body. However, as shown in fig. 1, the safety device includes a plurality of first electrical connection terminals 102 disposed on a side of a circuit board assembly 10, a light source assembly 12 assembled on the circuit board assembly 10, and a diffractive optical element package 14 mounted on the light source assembly 12, wherein a plurality of second electrical connection terminals 142 are disposed on a side of the diffractive optical element package 14, and the second electrical connection terminals 142 correspond to the first electrical connection terminals 102, two terminals 162 of a signal connector 16 are respectively disposed on the second electrical connection terminals 142 and the first electrical connection terminals 102, and silver paste is used to connect the two terminals 162 with the second electrical connection terminals 142 and the first electrical connection terminals 102 respectively to form a conductive loop, so as to detect whether the diffractive optical element package 14 is still at an original position, if not, the safety device will turn off the light source of the light source assembly 12 to avoid the risk that the emitted infrared ray will directly hurt human body without diffraction. When installing the signal connector 16, not only the positions of the second electrical connection terminals 142 and the first electrical connection terminals 102 need to be aligned up and down, but also precise dispensing is required, which is difficult for the side dispensing operation, and the operator needs to have high attention and precision regardless of the angle of the manufacturing process or the dispensing position, otherwise the dispensing error is easily caused to cause the problem of poor yield. Therefore, how to make the structural design of the safety device simpler and the dispensing operation easier is a problem to be solved urgently.
In view of the above, the present invention provides a light source safety device to overcome the above problems.
Disclosure of Invention
The present invention provides a light source safety device, which utilizes the direct signal connection of metal elastic device to solve the difficulty of side dispensing operation, and can complete the dispensing operation while installing the optical diffraction device to increase the manufacturing efficiency and precision.
The secondary objective of the present invention is to provide a light source safety device, which has a simpler overall structure and is easy to manufacture, and the signal connection device is designed in the base body, so as to further improve the stability of signal connection, thereby achieving industrial applicability.
To achieve the above object, the present invention provides a light source safety device, which includes a circuit board, a light source element, a base, an optical diffraction element and a mounting base. The light source element is electrically connected with the circuit board, two symmetrical metal elastic elements are arranged in the base, the circuit board is arranged at the bottom of the base, one end of each metal elastic element is connected with the circuit board, the other end of each metal elastic element is exposed out of the top end of the base, and the light source element is arranged between the two metal elastic elements; the mounting seat is arranged on the base, a metal loop element is arranged in the mounting seat and is abutted against the two metal elastic elements exposed out of the top end of the base to form a conducting loop, the optical diffraction element is arranged on the mounting seat, and the optical diffraction element and the metal loop element form signal connection by using glue dispensing.
The base is provided with two through holes and a first accommodating groove, the circuit board is arranged at the bottom of the base, one end of each metal elastic element is connected with the circuit board, the other end of each metal elastic element penetrates through the through hole to the outside of the top end of the base, and the light source element is arranged in the first accommodating groove.
The mounting seat is provided with a second containing groove and a mounting part, the mounting part is positioned above the second containing groove, the mounting part and the second containing groove are communicated with the first containing groove, the second containing groove is provided with a lens which can be a collimating lens, and the optical diffraction element is arranged in the mounting part.
Wherein, the installation part is further extended with a plurality of dispensing areas, and the optical diffraction element and the metal loop element form signal connection through the silver paste by injecting the dispensing method into the dispensing areas by the silver paste.
Wherein, one end of the two metal elastic elements is welded and fixed on the circuit board, and the light source element can be a laser light emitting diode packaging element (TO can) which is welded and fixed on the circuit board and is electrically connected with the circuit board.
Wherein the two metal elastic elements are metal probes or metal retractable spring pins.
Wherein, the circuit board controls the operation of the light source element, and when the optical diffraction element is not connected with the metal loop element by a signal, or the metal loop element and the two metal elastic elements are not formed into a conducting loop, the light source element is turned off, so as to improve the safety of the light source safety switch.
The surface of the optical diffraction element is provided with a transparent conductive film, and the transparent conductive film can be formed on the surface of the optical diffraction element in an electroplating mode.
The foregoing is merely illustrative of the problems, solutions to problems, and other advantages that may be realized and attained by the invention, and the details of which are set forth in the following description and the drawings.
Drawings
Fig. 1 is an exploded perspective view of a prior art security device.
FIG. 2 is a perspective view of the safety device of light source of the present invention.
Fig. 3 is an exploded perspective view of fig. 2.
Fig. 4 is a structural sectional view taken along a-a' of fig. 2.
FIG. 5 is another perspective view of the light source safety device of the present invention.
Reference numerals:
10 circuit board assembly
102 first electric connection terminal
12 light source assembly
14 optical diffraction element package
142 second electrical connection terminal
16 signal connector
162 terminal
20 circuit board
22 light source element
24 base
242 through hole
244 first receiving groove
26 optical diffraction element
262 transparent conductive film
28 mounting seat
282 second receiving groove
284 mounting part
286 glue dispensing area
30 metal elastic element
32 metal loop element
34 lens
36 silver glue
38 infrared ray module
382 infrared lens
384 floodlight induction element
386 driving circuit board
388 signal connector
Detailed Description
The present invention is an urgent research and innovation, and after many years of research on a spice music, a safety device for a light source is developed to solve the difficulty in the side dispensing process. In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It is to be understood, however, that these practical details are not to be interpreted as limiting, that is, in the manner in which some conventional structures and elements are shown in the drawings in a simplified schematic form in order to practice the present invention.
The new market trend of infrared sensing application is shown by the research in 2019, the application of a plurality of infrared products is continuously developed for mobile phone sensing, radar, optical sensing and the like, and the infinite commercial opportunity is brought to the infrared industry. Although the technology of introducing infrared into depth cameras or projection devices is competitive in the commercial market, it is necessary to improve the products such as depth cameras or projection devices to prevent infrared from damaging human body, but the manufacturing cost and manufacturing efficiency of the light source safety device are examined. Please refer to fig. 2 and fig. 3, which are a perspective structural view and a perspective exploded view of the present invention, wherein the detailed components and the assembly manner of the whole are described in detail to understand the overall structural design of the present invention. The light source security device includes a circuit board 20, a light source Element 22, a base 24, a Diffraction Optical Element (DOE) 26, and a mounting base 28. The light source element 22 is electrically connected to the circuit board 20, two symmetrical metal elastic elements 30 are disposed in the base 24, the circuit board 20 is disposed at the bottom of the base 24, one end of each metal elastic element 30 is connected to the circuit board 20, the other end of each metal elastic element 30 is exposed out of the top end of the base 24, and the light source element 22 is disposed between the two metal elastic elements 30.
Wherein, one end of the two metal elastic components 30 is welded and fixed on the circuit board 20, the two metal elastic components 30 are metal probes or metal retractable spring thimbles, and as for the metal probes (pogo pins), the spring type probe is formed by riveting and prepressing three basic components of a needle shaft, a spring and a needle tube through a precision instrument, the inside of the metal probe is of a precise spring structure, the surface is generally plated with gold, so that the corrosion resistance, the mechanical property, the electrical property and the like of the spring can be better improved, when the process is required, the spring is also plated with the gold thimbles to realize power-on or power-on, most of the spring is contacted with the copper wall through the oblique lower surface, and the spring bears a small amount, so that the inner wall of the copper sleeve is required to be smooth, and the requirement on the spring is high because most of current is required to be conducted through the spring. Since pogopin is a very fine probe, the weight and the volume of the appearance of the connector can be reduced when the pogopin is applied to a precision connector, and the connector can be more fine and beautiful. In addition, the retractable pogo pin can be an all-copper gold-plated retractable current pin, and the present invention utilizes many advantages and characteristics of the metal elastic element 30 as a signal connection element. Wherein the light source device 22 is an infrared laser diode module (To can) soldered on the circuit board 20, and has necessary electronic devices such as driving IC, and the light source device 22 is disposed between the two metal elastic devices 30. The laser diode has good light emitting efficiency, and the light signal can select specific wavelength to generate feedback under the working band, so as to control the laser resonant cavity to allow a single wavelength to generate resonance, thereby achieving the effect of no dispersion, having the characteristics of lightness, thinness, shortness, shock resistance, low power consumption, fast response, collision resistance, long service life, high efficiency, good directivity, high output power and the like, and being suitable for micro projection with long distance and high brightness, therefore, the invention utilizes the infrared laser diode module as the light source.
After the two metal elastic elements 30 are welded and fixed to the connecting circuit board 20 at one end and the light source element 22 is welded to the circuit board 20, the other ends of the two metal elastic elements 30 are correspondingly inserted through the two through holes 242 to the outside of the top end of the base 24, so that a part of the two metal elastic elements 30 are exposed outside, and the diameter of the two through holes 242 is slightly larger than the diameter of the two metal elastic elements 30, so that the assembly can be easily performed without being influenced by external force and causing a deviation phenomenon. Meanwhile, the light source element 22 is correspondingly installed in the first receiving groove 244, and the shape of the first receiving groove 244 matches with the shape of the light source element 22, so that the light source element can be stably assembled and fixed.
Next, referring to fig. 4, which is a cross-sectional view of the structure of fig. 2 along a-a', the mounting base 28 is disposed on the base 24, and a metal loop element 32 is disposed in the mounting base 28 and contacts with the two metal elastic elements 30 exposed at the top of the base 24 to form a conductive loop. The mounting base 28 further has a second receiving groove 282 and a mounting portion 284, the mounting portion 284 is located above the second receiving groove 282, and the mounting portion 284 and the second receiving groove 282 are communicated with the first receiving groove 244. The second receiving cavity 282 receives a lens 34 corresponding to the position of the light source emitted from the light source 22. The lens 34 can be a collimating lens, and functions to assist the light to travel to a degree of approximately parallel straight travel, so as to avoid light energy loss caused by light propagation divergence and collimate the light beam. The diffractive optical element 26 is disposed in the mounting portion 284, the mounting portion 284 further extends to form a plurality of dispensing regions 286, and the metal loop element 32 is exposed in the dispensing regions 286. The surface of the optical diffraction element 26 has a transparent conductive film (Indium Tin Oxide, ITO)262, which can be formed on the surface of the optical diffraction element 26 by electroplating, the optical diffraction element 26 calculates the surface structure of the diffraction element according to the known conditions based on the optical diffraction theory, so that the optical diffraction element 26 can change the wavefront phase of the laser beam passing through to generate the desired wavefront distribution, so the optical diffraction element 26 of the present invention can implement any desired optical image expression by matching the laser beam with infrared wavelength, finally, the silver paste 36 can be injected into the dispensing areas 286 to form signal connection by the transparent conductive film 262 of the optical diffraction element 26 and the metal circuit element 32 through the silver paste 36, i.e. to form a closed circuit.
After understanding the above-mentioned novel structure design of the present invention, in practical application, the circuit board 20 controls the operation of the light source element 22, and when the optical diffraction element 26 and the metal loop element 32 do not generate signal connection or the metal loop element 32 and the two metal elastic elements 30 do not form a conducting loop, the light source element 22 is turned off, so as to avoid the risk that the emitted laser infrared ray directly damages the human body without diffraction, thereby improving the safety of the light source. As shown in fig. 5, in another three-dimensional structure of the light source security device of the present invention, an infrared module 38 is further disposed on the base 24, and includes an infrared lens (IR Camera)382, a Flood light sensor (Flood Illuminator)384 and a driving circuit board 386, the infrared lens 382 and the Flood light sensor are electrically connected to the driving circuit board 386 and driven by the driving circuit board 386, and the driving circuit board 386 may be a Rigid-Flex board. The driving circuit board 386 is electrically connected to the circuit board 20 at the bottom of the base 24 through a signal connector 388, and the driving circuit board 386 operates according to the on/off of the light source device 22 controlled by the circuit board 20. The light source element 22 emits laser light source, which passes through the collimating lens to make the light path parallel, and then diffracts and strikes on the surface of the object through the optical diffraction element 26 to obtain the light spot Pattern (Pattern), the infrared lens of the infrared module 38 receives the light spot Pattern on the surface of the projected object, because the light spot patterns at any two places in the space are different and related to the space of the object, the depth information is calculated through the algorithm, and the three-dimensional information of the space can be obtained. The floodlight sensing element 384 is used for avoiding misjudgment caused by capturing the light spot pattern by using an infrared lens in an over-bright or over-dark environment.
In summary, the present invention utilizes the metal elastic element to directly connect with the signal to solve the difficulty of the side dispensing operation, and simultaneously embeds the metal loop element for signal connection in the mounting base, and then installs the optical diffraction element on the mounting base to form the signal loop, so that the design not only makes the signal more stable, but also prevents the risk of breaking caused by falling off. If the signal is not connected, the light source is turned off in real time, so as to ensure that the emitted laser infrared ray will not directly damage human body without diffraction, and the light source safety device has safety in use. In addition, the glue dispensing area is directly designed on the mounting base, so that the glue dispensing operation can be accurately and quickly completed by an operator, and the manufacturing efficiency and accuracy can be effectively improved. Furthermore, the overall structure design of the invention is simpler and easy to manufacture, and the assembly or dispensing operation can be completed quickly, thereby having market competitive advantages.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, all the equivalent changes or modifications according to the features and the spirit described in the scope of the application of the present invention should be included in the scope of the application of the present invention.
Claims (9)
1. A light source safety device, comprising:
a circuit board;
a light source element electrically connected to the circuit board;
a base, in which two symmetrical metal elastic elements are set, the circuit board is set at the bottom of the base, one end of the two metal elastic elements is connected to the circuit board, the other end is exposed out of the top of the base, the light source element is set between the two metal elastic elements;
an optical diffraction element; and
a mounting base, which is arranged on the base, wherein a metal loop element is arranged in the mounting base, the metal loop element is abutted against the two metal elastic elements exposed out of the top end of the base to form a conducting loop, the optical diffraction element is arranged on the mounting base, and the optical diffraction element and the metal loop element form signal connection by using glue dispensing; the mounting seat is provided with a second accommodating groove and a mounting part, the mounting part is further extended with a plurality of dispensing areas, each dispensing area respectively exposes a part of the metal loop element, the metal loop element is abutted against the two metal elastic elements exposed out of the top end of the base to form a conducting loop, and the optical diffraction assembly and the metal loop element are connected through silver adhesive to form signal connection by injecting the silver adhesive into the dispensing areas in a dispensing mode.
2. The light source security device of claim 1, wherein the base has two through holes and a first receiving slot, the circuit board is mounted on the bottom of the base, one end of the two metal elastic elements is connected to the circuit board, the other end of the two metal elastic elements passes through the through holes to the outside of the top of the base, and the light source element is mounted in the first receiving slot.
3. The luminaire security device as claimed in claim 2, wherein the mounting portion is located above the second receiving groove, the mounting portion and the second receiving groove are connected to the first receiving groove, the second receiving groove receives a lens, and the diffractive optical element is disposed in the mounting portion.
4. The light source security device of claim 3, wherein the lens is a collimating lens.
5. The light source security device of claim 1, wherein one end of the two metal elastic elements is soldered to the circuit board.
6. The light source safety device of claim 1, wherein the two metal elastic elements are metal probes.
7. The light source safety device of claim 1, wherein the two metal elastic elements are metal pogo pins.
8. The light source security device of claim 1, wherein the circuit board controls the operation of the light source device, and turns off the light source device when the optical diffraction device is not connected to the metal circuit device or when the metal circuit device and the two metal elastic devices do not form a conductive circuit.
9. The light source security device of claim 1 wherein the surface of the optical diffraction element has a transparent conductive film.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910303867.7A CN109870866B (en) | 2019-04-16 | 2019-04-16 | Light source safety device |
| TW108113799A TWI703867B (en) | 2019-04-16 | 2019-04-19 | Safety device for the light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910303867.7A CN109870866B (en) | 2019-04-16 | 2019-04-16 | Light source safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109870866A CN109870866A (en) | 2019-06-11 |
| CN109870866B true CN109870866B (en) | 2021-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910303867.7A Active CN109870866B (en) | 2019-04-16 | 2019-04-16 | Light source safety device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109870866B (en) |
| TW (1) | TWI703867B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM251413U (en) * | 2003-11-07 | 2004-11-21 | Hon Hai Prec Ind Co Ltd | Image pickup sensor and digital still camera module using the sensor |
| JP2006072232A (en) * | 2004-09-06 | 2006-03-16 | Mitsubishi Electric Corp | Optical transceiver module |
| TWI521744B (en) * | 2013-10-30 | 2016-02-11 | 光寶電子（廣州）有限公司 | Light-emitting structure |
| CN107277305B (en) * | 2016-04-01 | 2020-10-09 | 台湾东电化股份有限公司 | Camera module and control method thereof |
| CN109328318B (en) * | 2016-04-15 | 2021-11-02 | 赫普塔冈微光有限公司 | Optoelectronic module with alignment spacers and method for assembling the optoelectronic module |
| CN108333856B (en) * | 2017-01-19 | 2023-07-07 | 奥比中光科技集团股份有限公司 | Optical projection device and depth camera using same |
| CN112611546A (en) * | 2018-02-27 | 2021-04-06 | Oppo广东移动通信有限公司 | Laser projection module, depth camera and electronic device |
| CN108388067A (en) * | 2018-02-27 | 2018-08-10 | 广东欧珀移动通信有限公司 | Laser projection module, depth camera and electronic device |
| CN108924295B (en) * | 2018-06-27 | 2020-07-03 | Oppo广东移动通信有限公司 | Photoelectric module, depth camera and terminal |
-
2019
- 2019-04-16 CN CN201910303867.7A patent/CN109870866B/en active Active
- 2019-04-19 TW TW108113799A patent/TWI703867B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| TW202040996A (en) | 2020-11-01 |
| CN109870866A (en) | 2019-06-11 |
| TWI703867B (en) | 2020-09-01 |
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