CN114280685A - Infrared induction device, projector and electronic equipment - Google Patents
Infrared induction device, projector and electronic equipment Download PDFInfo
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- CN114280685A CN114280685A CN202111640713.0A CN202111640713A CN114280685A CN 114280685 A CN114280685 A CN 114280685A CN 202111640713 A CN202111640713 A CN 202111640713A CN 114280685 A CN114280685 A CN 114280685A
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Abstract
The invention relates to an infrared sensing device, a projector and an electronic device. The infrared induction device comprises a circuit substrate and a shading piece, wherein the circuit substrate is provided with an infrared transmitter and an infrared receiver, the shading piece covers the infrared transmitter and the infrared receiver, and the shading piece is provided with a transmitting through hole corresponding to the infrared transmitter and a receiving through hole corresponding to the infrared receiver; the side of the transmitting through hole comprises a first plane and a first arc-shaped surface which are connected, and the side of the receiving through hole comprises a second plane and a second arc-shaped surface which are connected. According to the infrared induction device provided by the invention, the side surfaces of the transmitting through hole and the receiving through hole on the shading part are both formed by the planes and the arc surfaces, and the sensing range of the infrared induction device is controlled through the planes in the transmitting through hole and the receiving through hole, so that the mistaken touch can be effectively avoided.
Description
Technical Field
The invention belongs to the technical field of electronic equipment, and particularly relates to an infrared sensing device, a projector and electronic equipment.
Background
The light projected by the projector is strong, and if the strong light irradiates the eyes of a person, the eyes can be permanently damaged. At present, a projector adopts an infrared sensing device to detect whether a human body enters a projection light range, and when the human body enters the projection light range, the projector stops projecting light rays to prevent direct light from burning eyes, so that the protection effect is achieved. However, the existing projector adopts an infrared sensing structure of a spherical micromirror, the sensing range is too large and is uncontrollable, and false triggering action is easy to occur in the sensing range. Similarly, other electronic devices using infrared sensing devices also suffer from similar problems, i.e. when a human body enters the detection range, the detection range is too large, which easily results in a false triggering action. Therefore, it is necessary to adopt a certain means to solve the above problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an infrared sensing device, a projector and electronic equipment.
The technical scheme provided by the invention is as follows:
an infrared induction device comprises
The infrared receiver comprises a circuit substrate, wherein an infrared transmitter and an infrared receiver are arranged on the circuit substrate;
the light shading piece covers the infrared transmitter and the infrared receiver, and is provided with a transmitting through hole corresponding to the infrared transmitter and a receiving through hole corresponding to the infrared receiver; the side of the transmitting through hole comprises a first plane and a first arc-shaped surface which are connected, and the side of the receiving through hole comprises a second plane and a second arc-shaped surface which are connected.
Based on the infrared sensing device provided by the invention, the side surface of the transmitting through hole is formed by the first plane and the first arc-shaped surface, partial infrared light rays transmitted by the infrared transmitter are shielded by the first plane, the limitation on the infrared light ray transmitting angle range is realized, the side surface of the receiving through hole is surrounded by the second plane and the second arc-shaped surface to form an infrared ray receiving channel, partial infrared light rays received by the infrared receiver are shielded by the second plane, the limitation on the infrared ray receiving angle range is realized, the sensing range of the infrared sensing device is limited, and the occurrence of mistaken touch is effectively avoided.
Further, the transmitting through hole and the receiving through hole are the same in shape.
Based on above-mentioned technical scheme, the shape of transmission through-hole is the same with the receiving through-hole, can make the first plane of transmission through-hole corresponding with the second plane of receiving the through-hole, and the scope of sheltering from of first plane and the scope of sheltering from of second plane match, has improved the precision that infrared sensing device prevented the mistake and touched.
Furthermore, the first arc-shaped surface is a part of the side surface of the first circular truncated cone, and the area of one end, facing the infrared emitter, of the emission through hole is smaller than the area of one end, facing away from the infrared emitter, of the emission through hole;
the second arc-shaped surface is a part of the side surface of the second circular truncated cone, and the area of one end, facing the infrared receiver, of the receiving through hole is smaller than the area of one end, facing away from the infrared receiver, of the receiving through hole.
Based on the technical scheme, the first arc-shaped surface of the transmitting through hole is a part of the side surface of the first circular truncated cone, and the second arc-shaped surface of the receiving through hole is a part of the side surface of the second circular truncated cone, so that the transmitted infrared ray can be ensured to have a larger transmitting angle, and the received infrared ray still has a larger incident angle.
Furthermore, the included angle between the side surface of the first circular truncated cone and the axis of the transmitting through hole ranges from 15 degrees to 40 degrees, and the included angle between the side surface of the second circular truncated cone and the axis of the receiving through hole ranges from 15 degrees to 40 degrees.
Based on the technical scheme, the included angle range of the side surface of the first circular truncated cone and the axis of the transmitting through hole is 15-40 degrees, the included angle range of the side surface of the second circular truncated cone and the axis of the receiving through hole is 15-40 degrees, the infrared induction device can be guaranteed to have an enough range of safe and effective induction areas, and the range of the safe and effective induction areas of the infrared induction device can be conveniently and accurately adjusted by setting the inclined angles of the side surface of the first circular truncated cone and the side surface of the second circular truncated cone.
Further, the size of the receiving through hole is larger than that of the transmitting through hole.
Based on above-mentioned technical scheme, the size of receiving the through-hole is greater than the size of transmission through-hole, is convenient for infrared receiver to receive the infrared light of reflection.
Further, the first plane is parallel to the axis of the transmitting through-hole, and the second plane is parallel to the axis of the receiving through-hole.
Based on above-mentioned technical scheme, first plane is on a parallel with the axis of transmission through-hole, and the second plane is on a parallel with the axis of receiving the through-hole, and the first plane of being convenient for and the second plane shelter from infrared light.
Further, the light shading piece is made of an elastic material. The elastic material can be silica gel, rubber and other elastic materials.
Based on the technical scheme, the through holes can be conveniently arranged, and the damage of the infrared sensing device can be avoided.
Furthermore, the infrared sensing device also comprises a transparent panel, and the transparent panel is tightly attached to the surface of one side, back to the circuit substrate, of the light shading piece.
Based on the technical scheme, the transparent panel is tightly attached to the shading piece, so that the infrared transmitter and the infrared receiver can be protected, and the crosstalk of infrared rays between the transmitting through hole and the receiving through hole can be prevented.
The invention also provides a projector which comprises the infrared sensing device.
The infrared induction device is arranged on the projector, the circuit substrate is electrically connected with the control circuit of the projector, and the induction range of the infrared induction device is limited, so that the error touch of the projector is effectively avoided.
The invention also provides electronic equipment which comprises the infrared sensing device.
The infrared induction device is arranged on the electronic equipment, the circuit substrate is electrically connected with the control circuit of the electronic equipment, and the induction range of the infrared induction device is limited, so that the electronic equipment is effectively prevented from being touched by mistake.
Drawings
Fig. 1 is a schematic view of an overall structure of an infrared sensing device provided by the present invention.
Fig. 2 is a front view of a light blocking member portion of the infrared sensing device provided by the present invention.
Fig. 3 is a sectional view of a light blocking member portion of an infrared sensing device provided in the present invention.
Fig. 4 is an exploded view of the infrared sensing device provided by the present invention.
Fig. 5 is a schematic view of a partial structure of the projector according to the present invention.
In fig. 1, 2, 3, 4, and 5, the structures represented by the reference numerals are listed below:
1. a circuit substrate; 21. an infrared emitter; 22. an infrared receiver; 3. a light shielding member; 4. a launch via; 401. a first plane 402, a first arc-shaped surface 5, a receiving through hole 501, a second plane 502, a second arc-shaped surface; 6. a transparent panel; 7. a casing.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 and 4, fig. 1 is a schematic structural diagram of an infrared sensing device according to an embodiment of the present invention, and fig. 4 is an exploded view of the infrared sensing device according to an embodiment of the present invention.
The infrared induction device comprises a circuit substrate 1 and a shading piece 3, wherein an infrared transmitter 21 and an infrared receiver 22 are arranged on the circuit substrate 1. The light shading piece 3 covers the infrared transmitter 21 and the infrared receiver 22, and a transmitting through hole 4 corresponding to the infrared transmitter 21 and a receiving through hole 5 corresponding to the infrared receiver 22 are arranged on the light shading piece 3; the side of the transmitting through-hole 4 includes a first plane 401 and a first arc face 402 connected, and the side of the receiving through-hole 5 includes a second plane 501 and a second arc face 502 connected.
According to the infrared sensing device provided by the invention, the side surface of the transmitting through hole 4 is formed by the first plane 401 and the first arc-shaped surface 402 which are connected, when infrared light generated by the infrared transmitter 21 is transmitted outwards through the transmitting through hole 4, the first plane 401 shields part of the infrared light transmitted by the infrared transmitter 21, so that the limit on the range of the transmitting angle of the infrared light is realized; the side of receiving through-hole 5 is formed by second plane 501 and the second arcwall face 502 of connecting, and when infrared light that is reflected back by external object was received by infrared receiver 22 through receiving through-hole 5, the infrared light of part that infrared receiver 22 received was sheltered from to second plane 501, has realized restricting infrared light reception angle scope to infrared induction system's response scope has been restricted, has avoided the emergence that the mistake touched effectively.
The circuit board 1 is provided with a printed circuit, and the infrared transmitter 21 and the infrared receiver 22 are connected to the printed circuit by wires. The circuit substrate 1 may further be provided with a fixing portion, such as a fixing hole, for fixing the infrared sensing device on other equipment.
In one embodiment, the transmitting via 4 and the receiving via 5 are identical in shape. That is, the occupation ratio of the first plane 401 to the first arc-shaped face 402 in the side face of the transmitting through-hole 4 is the same as the occupation ratio of the second plane 501 to the second arc-shaped face 502 in the side face of the receiving through-hole 5. Specifically, the position of the first plane 401 of the transmitting through hole 4 is the same as the position of the second plane 501 of the receiving through hole 5, as shown in fig. 1 and fig. 2, the first plane 401 is located right above the transmitting through hole 4, and the second plane 501 is located right above the receiving through hole 5, so that the infrared sensing device shields the upper area of the sensing area. It is understood that the first plane 401 and the second plane 501 may be disposed at other positions of the transmitting via 4 and the receiving via 5, respectively, such as directly below, leftwards or rightwards of the transmitting via 4 and the receiving via 5, respectively, according to the requirement of shielding the sensing region as required. Based on the technical scheme, the first plane 401 of the transmitting through hole 4 corresponds to the second plane 501 of the receiving through hole, so that the shielding range of the first plane is matched with that of the second plane, and the accuracy of preventing the infrared sensing device from being touched by mistake is improved.
Further, the size of the receiving through-hole 5 is larger than the size of the transmitting through-hole 4. On infrared light that infrared transmitter 21 launched shines external object, in the infrared light that is reflected by external object, only partial infrared light that is reflected can be received by infrared receiver 22 through receiving through-hole 5, moreover, infrared light is diverged the angle scope grow after being reflected, based on this technical scheme, the size through making receiving through-hole 5 is greater than the size of transmitting through-hole 4, be convenient for infrared receiver 22 receives the infrared light of reflection, improve received signal intensity.
In addition, the infrared transmitter 21 may be located at the center of the transmitting through hole 4, and the infrared receiver 22 may be located at the center of the receiving through hole 5, so that the transmitting range and the receiving range of the infrared light correspond to each other, which is also beneficial to improving the received signal strength.
In one embodiment, as shown in fig. 1, 2 and 3, the first arc-shaped surface 402 is a portion of a first circular truncated cone side surface, and an area of an end of the emission through hole 4 facing the infrared emitter 21 is smaller than an area of an end thereof facing away from the infrared emitter 21. The second arc-shaped surface 502 is a part of the side surface of the second circular truncated cone, and the area of the end of the receiving through hole 5 facing the infrared receiver 22 is smaller than the area of the end thereof facing away from the infrared receiver 22. The first arc-shaped surface 402 is a part of the side surface of the first circular truncated cone, and the size of the transmitting through hole 4 is gradually increased along the direction far away from the infrared transmitter 21, so that the infrared light transmitted through the transmitting through hole 4 still has a larger transmitting angle range; the second arc-shaped surface 502 is a part of the side surface of the second circular truncated cone, so that the size of the receiving through hole 5 gradually increases along the direction away from the infrared receiver 22, and it can be ensured that the infrared light received by the receiving through hole 5 still has a larger receiving angle range.
Further, as shown in fig. 3, the included angle α between the side surface of the first truncated cone and the axis of the transmitting through hole 4 ranges from 15 ° to 40 °, and correspondingly, the included angle α between the side surface of the second truncated cone and the axis of the receiving through hole 5 ranges from 15 ° to 40 °. The angle range can ensure that the infrared sensing device has a range with enough safe and effective sensing areas. The included angle between the side surface of the first circular truncated cone and the axis of the transmitting through hole 4 and the included angle between the side surface of the second circular truncated cone and the axis of the receiving through hole 5 can be set according to the safe and effective induction area range of the infrared induction device.
In other embodiments, the first arc face 402 is part of a first cylindrical side face and the second arc face 502 is part of a second cylindrical side face, i.e. the first arc face 402 is parallel to the axis of the transmitting through-hole 4; the second arc-shaped face 502 is parallel to the axis of the receiving through-hole 5. At this time, the shape of the transmitting through-hole 4 is a part of the cylindrical hole cut out in a plane, and the shape of the receiving through-hole 5 is also a part of the cylindrical hole cut out in a plane.
In one embodiment, as shown in fig. 2, 3, the first plane 401 is parallel to the axis of the transmitting through-hole 4 and the second plane 501 is parallel to the axis of the receiving through-hole 5. At one end of the transmitting through hole 4 facing the infrared emitter 21, the first plane 401 is tangent to the port edge of the transmitting through hole 4; at the end of the receiving through-hole 5 facing the infrared receiver 22, the second plane 501 is tangent to the port edge of the receiving through-hole 5. Based on the technical scheme, the first plane 401 and the second plane 501 can conveniently shield infrared rays, and the infrared shielding device is simple in structure and easy to manufacture.
In other embodiments, the first plane 401 may be inclined from the axis of the transmitting through-hole 4, and the second plane 501 may be inclined from the axis of the receiving through-hole 5, and the inclination angles of the two planes are the same. Based on the technical scheme, the shielding induction range of the infrared induction device can be adjusted by setting the inclination angles of the first plane 401 and the second plane 502. The inclination angles of the first plane 401 and the second plane 501 can be determined according to the sensing range of the required shielding.
In one embodiment, the light shielding member 3 has a plate shape, and the material thereof is an elastic material. The elastic material can be silica gel, rubber and other elastic materials. The light shielding member 3 is made of an elastic material, and can prevent the infrared emitter 21, the infrared receiver 22 and the circuit board 1 from being damaged while playing a role of shielding light. The transmitting through-hole 4 and the receiving through-hole 5 may be provided on the same light-shielding member 3; the light-shielding member 3 may also include two independent light-shielding portions, and the transmitting through-hole 4 and the receiving through-hole 5 are provided on one of the light-shielding portions, respectively.
In one embodiment, as shown in fig. 4, the infrared sensing device further comprises a transparent panel 6. The transparent panel 6 is closely attached to the surface of the light-shielding member 3 opposite to the circuit substrate 1. The transparent panel 6 may be a transparent glass plate, a transparent acrylic plate, or a transparent PC plate, and allows infrared light to smoothly pass through. By attaching the transparent panel to the light-shielding member, it is possible to protect the infrared transmitter 21 and the infrared receiver 22, for example, to prevent dust from being deposited on the outer transmitter 21 and the infrared receiver 22, to prevent the outer transmitter 21 and the infrared receiver 22 from being scratched, and the like, and to prevent crosstalk of infrared light between the transmitting through-hole and the receiving through-hole.
The invention also provides a projector which comprises the infrared sensing device. Specifically, as shown in fig. 5, the projector includes a housing 7, the infrared sensing device is disposed on the housing 7 of the projector, the circuit board 1 of the infrared sensing device is electrically connected to the control circuit inside the housing 7 of the projector, and the occurrence of the erroneous touch of the projector is effectively avoided by limiting the sensing range of the infrared sensing device.
The invention also provides electronic equipment which comprises the infrared sensing device.
The infrared induction device is arranged on the electronic equipment, the circuit substrate is electrically connected with the control circuit of the electronic equipment, and the induction range of the infrared induction device is limited, so that the electronic equipment is effectively prevented from being touched by mistake. The electronic equipment can be an air conditioner, an electric fan, a television, a sweeper and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An infrared sensing device, comprising:
the infrared receiver comprises a circuit substrate (1), wherein an infrared transmitter (21) and an infrared receiver (22) are arranged on the circuit substrate (1);
the light shielding piece (3) covers the infrared emitter (21) and the infrared receiver (22), and a transmitting through hole (4) corresponding to the infrared emitter (21) and a receiving through hole (5) corresponding to the infrared receiver (22) are formed in the light shielding piece (3); the side surface of the transmitting through hole (4) comprises a first plane (401) and a first arc-shaped surface (402) which are connected, and the side surface of the receiving through hole (5) comprises a second plane (501) and a second arc-shaped surface (502) which are connected.
2. The infrared sensing device as set forth in claim 1, wherein: the transmitting through hole (4) and the receiving through hole (5) are the same in shape.
3. The infrared sensing device as set forth in claim 2, wherein: the first arc-shaped surface (402) is a part of the side surface of the first circular truncated cone, and the area of one end, facing the infrared emitter (21), of the transmitting through hole (4) is smaller than the area of one end, facing away from the infrared emitter (21), of the transmitting through hole;
the second arc-shaped surface (502) is a part of the side surface of the second circular truncated cone, and the area of one end, facing the infrared receiver (22), of the receiving through hole (5) is smaller than the area of one end, facing away from the infrared receiver (22), of the receiving through hole.
4. The infrared sensing device as set forth in claim 3, wherein: the included angle between the side surface of the first circular truncated cone and the axis of the transmitting through hole (4) ranges from 15 degrees to 40 degrees, and the included angle between the side surface of the second circular truncated cone and the axis of the receiving through hole (5) ranges from 15 degrees to 40 degrees.
5. The infrared sensing device as set forth in claim 2, wherein: the size of the receiving through hole (5) is larger than that of the transmitting through hole (4).
6. The infrared sensing device as set forth in claim 2, wherein: the first plane (401) is parallel to the axis of the transmitting through hole (4) and the second plane (501) is parallel to the axis of the receiving through hole (5).
7. The infrared sensing device as set forth in claim 1, wherein: the shading piece (3) is made of elastic material.
8. The infrared sensing device as set forth in any one of claims 1 to 7, wherein: the circuit board is characterized by further comprising a transparent panel (6), wherein the transparent panel (6) is tightly attached to the surface of one side, back to the circuit board (1), of the light shading piece (3).
9. A projector, characterized in that: the projector includes the infrared sensing apparatus as set forth in any one of claims 1 to 8.
10. An electronic device, characterized in that: the electronic device comprises the infrared sensing apparatus as set forth in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640713.0A CN114280685A (en) | 2021-12-29 | 2021-12-29 | Infrared induction device, projector and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640713.0A CN114280685A (en) | 2021-12-29 | 2021-12-29 | Infrared induction device, projector and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114280685A true CN114280685A (en) | 2022-04-05 |
Family
ID=80877977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111640713.0A Pending CN114280685A (en) | 2021-12-29 | 2021-12-29 | Infrared induction device, projector and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114280685A (en) |
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2021
- 2021-12-29 CN CN202111640713.0A patent/CN114280685A/en active Pending
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