Detectors and mobile devices

Abstract

A detector (100) and a mobile terminal are provided. The detector (100) is configured to implement temperature detection. The detector (100) mainly includes a lens (10), a collimator hole (20), and an infrared sensor (30) arranged in an optical path. The lens (10) is configured to converge ambient light, which includes target area light and other area light. The collimator hole (20) is used to obtain the target area light by screening and block the other area light. Specifically, the collimator hole (20) is used to screen the incident ambient light, allowing only the target area light to be irradiated onto the infrared sensor (30). The infrared sensor (30) is configured to receive the target area light and block the other area light. The converging function of the lens (10) enables the detector (100) to detect body temperature over a relatively long distance, and the target area is selected through the provided collimator hole (20). This improves detection accuracy. Furthermore, the collimator hole (20) is used as a structure for screening light. This can reduce the volume of the detector (100), facilitating miniaturization of the detector (100).

Description

Technical Field

[0001] This application relates to the field of imaging technology, and more particularly, to detectors and mobile terminals.

Background Art

[0002] Cross-reference to Related Applications This application claims priority to Chinese Patent Application No. 202011379887.1, titled "DETECTOR AND MOBILE TERMINAL", filed with the China National Intellectual Property Administration on November 30, 2020, the entire content of which is incorporated herein by reference.

[0003] Infrared imaging technology was initially used for military purposes such as missile guidance and night vision surveys. In recent years, infrared imaging technology has been gradually developed for civilian applications. For example, infrared sensors are used in forehead thermometers for non-contact body temperature measurement. Any object emits electromagnetic waves when it is not at absolute zero. Higher temperatures indicate shorter wavelengths. When the temperature is higher than 3000K, the wavelength of the electromagnetic wave is within the visible light wavelength range and can be seen by the human eye.

[0004] Body temperature ranges from 35°C to 37°C (300K ( Kelvin ) ). The wavelength of the emitted electromagnetic wave ranges from 8μm to 12μm, which is within the far-infrared range. Therefore, measuring body temperature using an infrared sensor means detecting the infrared wavelength range from 8μm to 12μm using that sensor.

[0005] Currently, widely used infrared thermometers include forehead thermometers and thermal imagers. Forehead thermometers use thermopile sensors to measure temperature at a short distance of typically 2 cm. They have no lenses and are inexpensive. Thermal imagers are similar to cameras used to take photographs. They are equipped with precision optical lenses and can take clear infrared photographs. Another type of infrared thermometer is security check gate systems. The temperature measurement method of security check gate systems is similar to that of thermal imagers. They are usually equipped with two cameras, one for taking photographs in visible light and the other for taking photographs in infrared light. The two photographs taken in visible and infrared light are later combined according to AI algorithms and processed using other functions. However, with conventional technology, the detection distance of forehead thermometers is relatively short, and the structure of thermal imagers is relatively complex. As a result, neither forehead thermometers nor thermal imagers can be integrated into thin terminal devices. [Overview of the project]

[0006] This application provides a detector and a mobile terminal to implement long-range infrared temperature measurement and to improve the miniaturization of the detector.

[0007] According to a first embodiment, a detector is provided. The detector is configured to implement temperature detection. The detector mainly comprises a lens, a collimator hole, and an infrared sensor. The lens, collimator hole, and infrared sensor are arranged in the optical path. Light can pass through the lens and collimator hole and then irradiate the infrared sensor. The lens is configured to focus ambient light, and the ambient light includes target area light and other area light. Ambient light can enter the detector through the lens whether or not it is in the area to be detected. The collimator hole is used to acquire target area light by screening and to block other area light. Specifically, the collimator hole is used to screen the incident ambient light, and it is possible that only target area light is irradiated to the infrared sensor. The infrared sensor is configured to receive the target area light and block other area light. In the above technical solution, the focusing function of the lens allows the detector to detect body temperature over a relatively long distance, and the target area is selected through the provided collimator hole. This improves detection accuracy. Furthermore, the collimator hole is used as a structure for screening light. This allows for a reduction in the volume of the detector, facilitating miniaturization of the detector.

[0008] In specific implementation solutions, the ratio of the collimator hole diameter to the Airy disk diameter is between 0.5 and 3. This ensures the effectiveness of infrared light screening and improves detection.

[0009] In certain implementation solutions, the distance between the collimator hole and the lens may be greater than, equal to, or less than the focal length of the lens. Thus, different distances are required to be set based on the detection requirements.

[0010] In a specific implementation solution, the detector further includes a calibration sensor and a controller. The calibration sensor is configured to detect the internal temperature of the detector. The controller is configured to calibrate the infrared light temperature detected by the infrared sensor based on the detector temperature detected by the calibration sensor. This improves the detection effectiveness of the detector.

[0011] When infrared sensors and lenses are arranged, they can correspond to each other in different ways. For example, in an optional solution, there are multiple infrared sensors and multiple lenses. The number of lenses is the same as that of the infrared sensors, and the lenses are in one-to-one correspondence with the infrared sensors. Alternatively, there are multiple infrared sensors and one lens. There are multiple collimator holes, and the collimator holes are in one-to-one correspondence with the infrared sensors.

[0012] In the optional solution, when there are multiple lenses, a first light-blocking layer is placed between the lenses to isolate the light. Light crosstalk is avoided by using the first light-blocking layer. This ensures that the light passing through each lens is not interfered with.

[0013] In the optional solution, when there is one lens, the relative distance between the central axis of the collimator hole and the central axis of the corresponding infrared sensor increases as the distance between the central axis of the corresponding infrared sensor and the central axis of the lens increases. This improves the effect of illuminating the collimator hole with light.

[0014] An optional solution further includes a substrate and a package cover. The package cover and substrate are connected in a sealed manner to enclose a space for housing the infrared detector. The substrate and package cover are used as supports for the collimator hole and lens.

[0015] In the optional solution, a second light-blocking layer is placed on the package cover, and the collimator holes are provided within the second light-blocking layer.

[0016] In the optional solution, the lens is a protruding structure placed on the package cover. This simplifies the structure of the detector.

[0017] In the optional solution, the lens is positioned independently and may be supported by using a bracket or housing of the mobile device.

[0018] In the optional solution, the detector further includes a housing configured to isolate heat from the external environment. The collimator hole and infrared sensor are located within the housing. This further improves the detection effect.

[0019] According to a second embodiment, a mobile terminal is provided. The mobile terminal includes a circuit board and a detector disposed on the circuit board, according to one of the foregoing. The circuit board is electrically connected to an infrared sensor of the detector. In the aforementioned technical solution, the focusing function of the lens allows the detector to detect body temperature over a relatively long distance, and ambient stray light is removed through a provided collimator hole. This improves detection accuracy. Furthermore, the collimator hole is used as a structure for screening light. This can reduce the volume of the detector and facilitate miniaturization of the detector.

[0020] In the optional solution, when the detector includes a controller, the controller is electrically connected to the circuit board. [Brief explanation of the drawing]

[0021] [Figure 1] This is a schematic diagram of the application scenarios for the detector. [Figure 2] This is a block diagram of the structure of a detector according to one embodiment of this application. [Figure 3] This is a schematic diagram of the structure of a detector according to one embodiment of this application. [Figure 4] This is a schematic diagram illustrating an application scenario for a detector according to one embodiment of this application. [Figure 5] It is a schematic diagram of the structure of a mobile terminal according to an embodiment of the present application. [Figure 6] It is a schematic diagram of the structure of another detector according to an embodiment of the present application. [Figure 7] It is a schematic diagram of the structure of another detector according to an embodiment of the present application. [Figure 8] It is a schematic diagram of the structure of another detector according to an embodiment of the present application. / / 原文此处无换行,翻译后也无换行 [Figure 9] / / 原文此处无换行,翻译后也无换行 It is a schematic diagram of the structure of another detector according to an embodiment of the present application. [Figure 10] It is a schematic diagram of the structure of another detector according to an embodiment of the present application. [Figure 11] It is a schematic diagram of the structure of another detector according to an embodiment of the present application. [Figure 12] It is a schematic diagram of the structure of another detector according to an embodiment of the present application. [Figure 13] It is a schematic diagram of the structure of another detector according to an embodiment of the present application.

Mode for Carrying Out the Invention

[0022] The following further describes the embodiments of the present application with reference to the accompanying drawings.

[0023] To facilitate understanding of the detector used in the embodiments of this application, an application scenario for the detector is first described. The detector provided in the embodiments of this application is applied in the field of body temperature detection. Figure 1 shows a body temperature test scenario. The detector 100 detects body temperature by facing the forehead of the person being tested and detecting the forehead temperature of the human body. In the prior art, forehead thermometers are typically configured to detect body temperature. However, the detection distance of forehead thermometers is relatively short, only 1 cm to 3 cm, and the size of forehead thermometers is relatively large. Therefore, one embodiment of this application provides a detector 100 for increasing the detection distance. In this way, forehead temperature can be measured at a distance of 20 cm to 2 m, or even longer. This implements miniaturization. The detector will be described in detail below with reference to specific appended drawings and embodiments.

[0024] Figure 2 is a block diagram of the structure of a detector according to one embodiment of the present application. The detector includes a lens 10, a collimator hole 20, and an infrared sensor 30. The lens 10, collimator hole 20, and infrared sensor 30 are arranged in the optical path. The collimator hole 20 is located in the center. The lens 10 and infrared sensor 30 are located on either side of the collimator hole 20. Light can pass through the lens 10 and collimator hole 20 and then irradiate the infrared sensor 30. The infrared sensor 30 converts the optical signal of the received infrared light in the light passing through the lens 10 and collimator hole 20 into an electrical signal, and based on the electrical signal, can determine the temperature of the received infrared light. The body temperature of the person being detected is determined based on the detected temperature of the infrared light.

[0025] Lens 10 is configured to focus ambient light and concentrate light from outside the detector into the detector. Lens 10 may use different types of lenses, provided that the light can be focused. For example, lens 10 may be a biconvex lens, a monoconvex lens, a triangular prism, or a polyhedron prism.

[0026] Lens 10 does not screen light. The ambient light passing through lens 10 includes target area light and another area light. The target area light is the area where the person to be detected is located for detection. Light in This means the following. Please refer to the application scenario shown in Figure 1. When the detector detects the forehead of a person being detected, the forehead area of ​​the person being detected is the target area, and the light emitted from the forehead is the target area light. Another area light refers to light in areas other than the target area. For example, during detection, there is a first person being detected and a second person being detected. When the first person being detected is detected, the light sent by the target area of ​​the first person being detected is the target area light, and the infrared light emitted by the second person being detected is another area light. Similarly, when the second person being detected is detected, the infrared light emitted by the first person being detected is another area light.

[0027] To ensure detection accuracy, during detection, another area light should not be shone upon the infrared sensor 30. Therefore, the collimator hole 20 is positioned on the optical path so that light from different areas can be selected through the collimator hole 20. From the structure shown in Figure 2, it can be seen that the collimator hole 20 and the lens 10 form a structure similar to that of a telescope, and the diameter of the lens 10 is much larger than that of the collimator hole 20. Therefore, when the target area light and another area light are shone upon the collimator hole 20, only the target area light can pass through the collimator hole 20, and the other area light cannot pass through the collimator hole 20.

[0028] As an optional solution, when the collimator hole 20 is used to acquire target area light by screening, the ratio of the diameter of the collimator hole 20 to the diameter of the Airy disk is between 0.5 and 3. The Airy disk is a point of light formed at the focal point by diffraction when a point light source is imaged through restricted diffraction. The center of the point of light is a bright, round spot surrounded by a group of concentric ring-shaped bands of alternating light and dark. The bright central point bounded by the first dark ring is called the Airy disk.

[0029] For example, the ratio of the diameter of the collimator hole 20 to the diameter of the Airy disk can be 0.5, 1, 2, 2.5, 3, etc. When using the aforementioned structure, the collimator hole 20 can allow target area light to pass through and block other area light.

[0030] The infrared sensor 30 is configured to receive infrared light within the target area light and detect temperature based on the infrared light. When the infrared sensor 30 receives the target area light passing through the collimator hole 20, the target area light includes infrared light and ambient stray light. However, during detection, it is necessary that only infrared light be detected. Therefore, the infrared sensor 30 is used as a detector. The infrared sensor 30 can receive only infrared light and does not receive other ambient stray light. This can avoid interference from ambient stray light. When infrared light is shone on the infrared sensor 30, the optical signal can be converted into an electrical signal by the infrared sensor 30, and the temperature of the object being detected can be determined by detecting this electrical signal.

[0031] Figure 3 is a schematic diagram of the structure of a detector according to one embodiment of the present application. The detector lens 10 may be located on the housing or bracket of a mobile terminal. Figure 3 shows an example in which the lens 10 is located on the housing 200 of a mobile terminal. Ambient light may enter the housing 200 through the lens 10.

[0032] The detector includes a substrate 40 and a package cover 50. The substrate 40 is configured to support the infrared sensor 30 as a support structure for the infrared sensor 30. It should be understood that a circuit layer is arranged on the substrate 40, and the infrared sensor 30 is electrically connected to the circuit layer of the substrate 40.

[0033] The substrate 40 is provided with a first groove 41 used to house the infrared sensor 30. The infrared sensor 30 is positioned within the first groove 41 and mounted to the substrate 40 by using a cantilever beam 42 extending within the first groove 41. This minimizes contact between the infrared sensor 30 and other structures and avoids interference caused to the infrared sensor 30 by the temperature of other structures.

[0034] The package cover 50 covers the substrate 40, and the package cover 50 has one second groove 51. The second groove 51 corresponds to the first groove 41, and together they surround a space for housing the infrared sensor 30. In this way, the infrared sensor 30 does not come into contact with the substrate 40 and the package cover 50. Furthermore, the package cover 50 and the substrate 40 are connected in a sealed manner. While sealed, the space surrounded by the first groove 41 and the second groove 51 is evacuated to form a vacuum package. This further reduces interference of convective heat dissipation of gas in the first groove 41 and the second groove 51 with respect to the infrared sensor 30. It should be understood that, in order to ensure that light passing through the lens 10 can irradiate the infrared sensor 30, the package cover 50 may be made of a material that allows infrared light to pass through. For example, this material may be silicon, germanium, ZnS, ZnSe, chalcogenide glass, etc. A silicon material is used as an example. Silicon itself has relatively good transmittance in the infrared light range at wavelengths of 8 μm to 10 μm.

[0035] As an optional solution, an anti-reflective coating may be added to the surface of the package cover. This improves the transmittance of the package cover and extends the wavelength of light that passes through from 8 μm to 12 μm or more.

[0036] The package cover 50 has a first surface. The first surface is the surface of the package cover 50 and the surface opposite to the substrate 40. Light enters the package cover 50 from the first surface. A second light-blocking layer 70 is placed on the first surface. The second light-blocking layer 70 includes a first light-transmitting hole 71. The first light-transmitting hole 71 is located in the optical path. Light passing through the lens 10 can enter the package cover 50 through the first light-transmitting hole 71, and light outside the optical path can be blocked by the second light-blocking layer 70. In this way, the second light-blocking layer 70 can reduce interference to the infrared sensor 30 by reducing any ambient stray light that irradiates the infrared sensor 30. The second light-blocking layer 70 may be made of a metallic material such as aluminum, nickel, titanium, gold, or copper, or it may be made by coating it with a light-absorbing material such as nanocarbon black. The diameter of the first light-transmitting hole 71 may be larger than, equal to, or less than the diameter of the lens 10. This is not particularly limited in this specification. As an optional solution, the diameter of the first light-transmitting hole 71 is slightly smaller than the diameter of the lens 10.

[0037] The first light-blocking layer 80 is positioned on the side wall of the second groove 51 of the package cover 50. The collimator hole 20 is provided within the first light-blocking layer 80. Light inside the package cover 50 can pass through the collimator hole 20 and irradiate the infrared sensor 30. Target area light is selected through the collimator hole 20. Other area light is absorbed or reflected by the first light-blocking layer 80. For example, the first light-blocking layer 80 may be made of a metallic material such as aluminum, nickel, titanium, gold, or copper, or it may be made by coating it with a light-absorbing material such as nanocarbon black.

[0038] The ratio of the diameter of the collimator hole 20 to the diameter of the Airy disk is between 0.5 and 3. For example, the ratio of the diameter of the collimator hole 20 to the diameter of the Airy disk may be 0.5, 1, 2, 2.5, 3, etc. When using the aforementioned structure, the collimator hole 20 may allow target area light to pass through and block other area light.

[0039] As an optional solution, the detector further includes a housing 60 configured to isolate heat from the external environment. As shown in Figure 3, both the substrate 40 and the package cover 50 are located within the housing 60. Furthermore, the collimator hole 20 and the infrared sensor 30 are located within the housing 60. External heat can be isolated by using the housing 60, reducing the adverse effects of external heat on the detection results of the infrared sensor 30. For example, the housing 60 may be made of resin, plastic, or another common material having relatively low thermal conductivity. As an optional solution, the inner wall of the housing 60 may be coated with an insulating layer, or the housing 60 may be made of an insulating material. This further improves the insulating effect.

[0040] Figure 4 is a schematic diagram of an application scenario of a detector according to one embodiment of the present application. During use, the lens 10 faces the person being detected. After passing through the lens 10, infrared light emitted by the person being detected can enter the infrared sensor 30 for detection through the collimator hole 20. The collimator hole 20 reduces the amount of incoming light, but the reduction in spatial sampling size can improve the resolution of the graph and image. Furthermore, the collimator hole 20 may allow the detector to detect longer distances.

[0041] Figure 5 is a schematic diagram of the structure of a mobile terminal according to one embodiment of the present application. The detector is located within the housing 200 of the mobile terminal and is mounted on a structure capable of supporting components, such as a bracket 201 or circuit board within the housing 200. From Figure 5, it can be understood that the housing 200 supports the lens 10, and the collimator hole 20 and infrared sensor 30 are located within the housing. In this way, the detector can be integrated into a mobile terminal having a relatively small size, such as a mobile phone or tablet computer.

[0042] Figure 6 shows a modified structure based on the detector shown in Figure 3. Some reference numerals in Figure 6 should be referenced to the same reference numerals in Figure 3. Further details are not described again herein. Lens 10 is a package cover. 50 It can be integrated into the package cover, as shown in Figure 6. 50 The portion of which is exposed within the first light-transmitting hole 71 is the package cover 50 It forms an external arc-shaped projection structure that faces the surface. This arc-shaped projection structure is used as the lens 10 of the detector, and as a result, the overall structure of the detector is more compact.

[0043] When the lens 10 and collimator hole 20 are specifically provided, the distance d from the lens 10 to the collimator hole 20 may be approximately equal to the focal length f of the lens 10. The distance d may be adjusted based on different design purposes. For example, the distance d between the collimator hole 20 and the lens 10 may be greater than, equal to, or less than the focal length f of the lens 10. Different provisioning methods are described below with reference to specific attached drawings. It should be understood that the straight arrows shown in the attached drawings represent light at the edge of the light-receiving range of the detector.

[0044] Figure 7 is a schematic diagram when d=f. When d=f, a straight beam of light can be received, achieving the farthest detection distance. However, the detection range of the detector is relatively narrow.

[0045] FIG. 8 is a schematic diagram when d < f. When d < f, the infrared sensor can receive more infrared light, improving the detection rate of the detector. During placement, a specific field of view of the detector can be designed based on actual requirements.

[0046] FIG. 9 is a schematic diagram when d > f. When d > f, the infrared sensor can improve the resolution of the detector within a specific detection distance range.

[0047] FIG. 10 is another modified structure based on the detector shown in FIG. 9. For some reference numerals in FIG. 10, refer to the same reference numerals in FIG. 9. Details are not described again herein. The detector includes a plurality of infrared sensors and has a plurality of corresponding lenses and collimator holes. There are also a plurality of lenses, and these plurality of lenses are in one-to-one correspondence with the plurality of infrared sensors. FIG. 10 only shows the first infrared sensor 31 and the second infrared sensor 32 On the optical path, the first lens 11, the first collimator hole 21, and the first infrared sensor 31 correspond to each other, and the second lens 12, the second collimator hole 22, and the second infrared sensor 32 correspond to each other.

[0048] As an optional solution, when there are a plurality of lenses, a second light blocking layer 70 for isolating light is arranged between the plurality of lenses. The second light blocking layer 70 is arranged on the first surface of the package cover 50. When light is irradiated on the lens, by using the second light blocking layer 70, light crosstalk is avoided. This ensures that the light passing through each of the lenses does not interfere with each other.

[0049] It should be understood that the detection areas corresponding to the first lens 11 and the second lens 12 shown in FIG. 10 are the same as the detection areas of the infrared sensors shown in FIG. 9.

[0050] The number of infrared sensors provided in this embodiment of the present application is not limited to two, as shown in Figure 10. Alternatively, there may be three, four, and so on. When multiple infrared sensors are used, they may be arranged in an array, and the corresponding collimator holes and lenses may also be arranged in an array. Furthermore, the arrangement of multiple infrared sensors shown in Figure 10 may also be applied to the structure shown in Figure 3. When the lenses use a separate structure, arrangements of multiple lenses, infrared sensors, and collimator holes may also be used.

[0051] Figure 11 shows a modified structure of Figure 10. Some reference numerals in Figure 11 should be referenced to the same reference numerals in Figure 10. In the structure shown in Figure 11, the first infrared sensor 31 and the second infrared sensor 32 share a single third lens 14. Some of the light passing through the third lens 14 enters the first infrared sensor 31 through the first collimator hole 21, and some of the light enters the second infrared sensor 32 through the second collimator hole 22.

[0052] Refer to Figure 11. The first infrared sensor 31 and the second infrared sensor 32 are positioned separately on either side of the central axis L1 of the third lens 14. The distance between the central axis H1 of the first collimator hole 21 and the central axis G1 of the first infrared sensor 31 is d1. The distance between the central axis H2 of the second collimator hole 22 and the central axis G2 of the second infrared sensor 32 is d2. The distance between d1 and d2 relates to the lens CRA that can be accepted by the first infrared sensor 31. The first collimator hole 21 and the second collimator hole 22 may be provided based on the corresponding lens CRA that can be accepted by the first infrared sensor 31 and the second infrared sensor 32. CRA (Chief Ray Angle) means the maximum angle of light that can be focused on the infrared sensor, from the lens towards the infrared sensor side.

[0053] To easily understand the correspondence between the infrared sensors and their corresponding collimator holes, please refer to the detector structure using multiple infrared sensors shown in Figure 12.

[0054] Some reference numerals in Figure 12 should be referenced to the same reference numerals in Figure 10. In the structure shown in Figure 12, there are multiple infrared sensors, and these multiple infrared sensors are arranged in an array. Figure 12 shows an example of how one row of infrared sensors is arranged in an array. One row of infrared sensors includes a first infrared sensor 33, a second infrared sensor 34, a third infrared sensor 35, a fourth infrared sensor 36, and a fifth infrared sensor 37. The first infrared sensors 33 through the fifth infrared sensors 37 share one lens 10.

[0055] Multiple collimator holes corresponding to the aforementioned infrared sensors are provided offset from the lens 10 based on the CRA requirements of the corresponding sensors. To facilitate the correspondence between the collimator holes and the corresponding infrared sensors, the following introduces the central axis of the lens 10, the central axis of the infrared sensors, and the central axis of the collimator holes. The infrared sensors and the corresponding collimator holes satisfy the following condition: the relative distance between the central axis of the collimator hole and the central axis of the corresponding infrared sensor increases as the distance between the central axis of the corresponding infrared sensor and the central axis of the lens increases.

[0056] Please refer to Figure 12. The central axis G1 of the first infrared sensor 33 coincides with the central axis L1 of the lens 10. The pairs of the second infrared sensor 34 and the third infrared sensor 35, and the pairs of the fourth infrared sensor 36 and the fifth infrared sensor 37 are arranged symmetrically on both sides of the first infrared sensor 33.

[0057] The central axis H1 of the first collimator hole 23 coincides with the central axis G1 of the first infrared sensor 33 and the central axis L1 of the lens 10. The central axis H2 of the second collimator hole 24 andThe distance between the lens 10 and its central axis G2 is d1, and the distance between the central axis H3 of the third collimator hole 25 and its central axis G3 of the third infrared sensor 35 is d2. Correspondingly, the distance between the central axis H4 of the fourth collimator hole 26 and its central axis G4 of the fourth infrared sensor 36 is d1, and the distance between the central axis H5 of the fifth collimator hole 27 and its central axis G5 of the fifth infrared sensor 37 is d2. d1 and d2 must satisfy the following condition, namely d2 > d1, in order to ensure that as the CRA corresponding to the sensor changes, the position of the corresponding collimator hole relative to the infrared sensor also changes. In this way, light passing through the lens 10 can be irradiated onto the infrared sensor.

[0058] Figure 13 shows a modified structure based on the detector shown in Figure 9. Some reference numerals in Figure 13 should be referenced to the same reference numerals in Figure 3. In addition to the infrared sensor 30, the detector further includes a calibration sensor 90. The calibration sensor 90 is configured to detect the internal temperature of the detector. During placement, the calibration sensor 90 and the infrared sensor 30 are positioned similarly. By using a cantilever beam, the substrate 40 is attached to the calibration sensor 90, and both the substrate 40 and the package cover 50 have grooves to avoid the calibration sensor 90. Furthermore, vacuum packaging is also performed on the calibration sensor 90 to ensure the detection sensitivity of the calibration sensor 90. During detection, the calibration sensor 90 can detect the temperature inside the detector and more accurately detect the temperature of the calibration sensor 90. From Figure 13, it can be seen that the calibration sensor 90 and the infrared sensor 30 are in the same environment. Therefore, the temperature detected by the calibration sensor 90 can also be considered the temperature of the infrared sensor 30.

[0059] The detector further includes a controller. The controller is configured to calibrate the infrared light temperature detected by the infrared sensor 30 based on the detector temperature detected by the calibration sensor 90. For example, if the temperature detected by the infrared sensor 30 is T1 and the temperature detected by the calibration sensor 90 is T2, the controller may obtain a calibrated temperature T0 = T1 - T2 based on the two detected temperatures. In this way, the detector may obtain a more accurate calibration temperature.

[0060] One embodiment of this application further provides a mobile terminal. The mobile terminal includes a circuit board and a detector disposed on the circuit board, according to one of the foregoing. The circuit board is electrically connected to an infrared sensor of the detector. Furthermore, when the detector includes a controller, the controller is also electrically connected to the circuit board. In the aforementioned technical solution, the focusing function of the lens allows the detector to detect body temperature over a relatively long distance, and ambient stray light is removed through a provided collimator hole. This improves detection accuracy. Furthermore, the collimator hole is used as a structure for screening light. This can reduce the volume of the detector and facilitate miniaturization of the detector.

[0061] In the optional solution, the mobile device further includes a housing. The housing has a light-transmitting hole. The detector lens may be embedded within the light-transmitting hole. The detector lens is supported by the housing. This further reduces the size occupied by the detector within the mobile device.

[0062] As an optional solution, the detector provided in this embodiment of the present application may further operate in conjunction with the front or rear camera of a mobile device. Temperature measurement may be performed using the front or rear camera to measure body temperature when taking a selfie or when taking a portrait photograph with the rear camera.

[0063] As an optional solution, the detector may also work in conjunction with the mobile device's AI (Artificial Intelligence) facial recognition. When the user unlocks the mobile device via AI facial recognition, the mobile device may automatically record the user's monitoring data regarding their personal health and body temperature.

[0064] The detector provided in this embodiment of the present application may further be integrated into a mobile terminal and operate together with the mobile phone's distance sensor. During body temperature detection, the distance information of the person being detected is detected by using the distance sensor, the temperature information of the person being detected is detected by using the detector, and the temperature measurement data is collected. temperature It is calibrated based on the information.

[0065] Furthermore, the detector may be used for further CIS (contact image sensor, scanner) designs for visible light image / video acquisition in order to implement a lensless CIS imaging system.

[0066] It is clear that a person skilled in the art can make various modifications and changes to this application without departing from the spirit and scope of this application. That is This application is intended to include these modifications and changes to this application, provided that they fall within the scope of protection and equivalent art defined by the following claims.

Claims

1. A detector comprising one or more lenses, a plurality of collimator holes, and a plurality of infrared sensors arranged in the optical path, The lens is configured to focus peripheral light, and the peripheral light comprises a target area light and another area light. The collimator hole is used to acquire the target area light by screening and block the other area light, and The infrared sensor is configured to receive infrared light within the target area light and to detect temperature based on the infrared light. The detector is A detector further comprising a substrate and a package cover, wherein the package cover and the substrate are connected in a sealed manner to enclose a space for housing the infrared sensor, and if there are multiple lenses, a second light-blocking layer is disposed between the multiple lenses on the package cover, and each of the multiple lenses is in one-to-one correspondence with each of the multiple infrared sensors, and the collimator hole is provided within the second light-blocking layer and within a first light-blocking layer disposed on the side wall of a second groove formed in the package cover in the space for housing the infrared sensor, and the distance between the collimator hole and the lens is adjusted to be greater than the focal length of the lens.

2. The detector according to claim 1, wherein the ratio of the diameter of the collimator hole to the diameter of the Airy disk is 0.5 or more and 3 or less.

3. Further equipped with calibration sensors and controllers, The calibration sensor is configured to detect the internal temperature of the detector, and The detector according to claim 1 or 2, wherein the controller is configured to calibrate the temperature detected by the infrared sensor based on the internal temperature detected by the calibration sensor.

4. The detector according to any one of claims 1 to 3, wherein there are multiple infrared sensors, and the number of lenses is the same as the number of infrared sensors.

5. The detector according to claim 4, wherein the first light-blocking layer for isolating light is positioned between two adjacent lenses.

6. The detector according to any one of claims 1 to 3, wherein, in the case of one lens, there are a plurality of infrared sensors and a plurality of collimator holes, the plurality of collimator holes are in one-to-one correspondence with the plurality of infrared sensors, and the relative distance between the central axis of a collimator hole and the central axis of a corresponding infrared sensor increases as the distance between the central axis of a corresponding infrared sensor and the central axis of the lens increases.

7. The detector according to claim 1, wherein the lens is a protruding structure disposed on the package cover.

8. The detector according to any one of claims 1 to 7, further comprising a housing configured to isolate heat from the external environment, wherein the collimator hole and the infrared sensor are located within the housing.

9. A mobile terminal comprising a circuit board and a detector disposed on the circuit board according to any one of claims 1 to 8, wherein the circuit board is electrically connected to an infrared sensor of the detector.

10. The mobile terminal according to claim 9, wherein the detector includes a controller, and the controller is electrically connected to the circuit board.

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