A probe and mobile terminal

Abstract

The application provides a detector and a mobile terminal, and the detector is used for temperature detection. The detector mainly comprises a lens, a collimating aperture and an infrared sensor arranged along an optical path. The lens is used for converging external light, and the external light comprises target area light and other area light. The collimating aperture is used for screening the target area light and blocking the other area light, that is, the collimating aperture is used for screening the external light, and only the light in the target area is allowed to irradiate the infrared sensor. The infrared sensor is used for receiving the target area light and blocking the other area light. In the above technical scheme, the converging effect of the lens enables the detector to detect the temperature of a human body at a long distance, and the collimating aperture is used to select the target area, thereby improving the detection accuracy. In addition, the collimating aperture is used as a light screening structure, thereby reducing the volume of the detector and facilitating the miniaturization development of the detector.

Description

Technical Field

[0001] This application relates to the field of imaging technology, and in particular to a detector and a mobile terminal. Background Technology

[0002] Infrared imaging technology originated from military applications, such as missile guidance and night vision reconnaissance. In recent years, it has gradually expanded into civilian applications; for example, forehead thermometers, which measure body temperature without contact, use infrared sensors. Any object, except for one at absolute zero, radiates electromagnetic waves; the higher the temperature, the shorter the wavelength. When the temperature is above 3000K, the wavelength of the electromagnetic waves falls within the visible light range and is visible to the human eye.

[0003] Human body temperature is usually between 35 and 37°C, about 300 Kelvin. The electromagnetic waves it radiates have wavelengths in the far-infrared range of 8 to 12 μm. Therefore, using an infrared sensor to measure human body temperature means using the sensor to detect the infrared wavelength range of 8 to 12 μm.

[0004] Currently, widely used infrared temperature measurement devices include forehead thermometers and thermal imagers. Forehead thermometers use thermopile sensors, typically measuring temperature at a close range of 2cm, without a lens, making them low-cost. Thermal imagers are similar to cameras used for taking pictures, equipped with precision optical lenses to capture clear infrared images. Another type is the access card integrated machine, which uses a similar temperature measurement method to thermal imagers. It usually has two cameras, one capturing visible light and the other capturing infrared light. The two images are then fused using AI algorithms and other processing functions in post-production. However, current forehead thermometers have relatively short detection ranges, and thermal imagers have complex structures that cannot be integrated into thin terminal devices. Summary of the Invention

[0005] This application provides a detector and a mobile terminal for achieving long-distance infrared temperature measurement and improving the miniaturization of the detector.

[0006] Firstly, a detector is provided for temperature detection. This detector mainly comprises a lens, a collimating aperture, and an infrared sensor. In its configuration, the lens, collimating aperture, and infrared sensor are arranged along the optical path, allowing light to pass through the lens and collimating aperture before illuminating the infrared sensor. The lens focuses external light, including light from the target area and light from other areas. All external light, regardless of whether it is within the detected area, can pass through the lens and enter the detector. The collimating aperture filters the light from the target area and blocks light from other areas; that is, it filters the incoming external light, allowing only light from the target area to reach the infrared sensor. The infrared sensor receives the light from the target area and blocks light from other areas. In this technical solution, the focusing effect of the lens allows the detector to detect human body temperature at a greater distance, and the collimating aperture selects the target area, improving detection accuracy. Furthermore, using the collimating aperture as a light-filtering structure reduces the detector's size, facilitating miniaturization.

[0007] In one specific implementation, the ratio of the diameter of the collimating aperture to the diameter of the Airy disk is greater than or equal to 0.5 and less than or equal to 3. This ensures the effectiveness of filtering infrared light and improves the detection result.

[0008] In one specific feasible implementation, the distance between the collimating aperture and the lens can be greater than, equal to, or less than the focal length of the lens. This allows for different distances to be set according to the detection requirements.

[0009] In one specific implementation, the detector further includes a calibration sensor and a controller. The calibration sensor is used to detect the internal temperature of the detector; the controller is used to calibrate the temperature of the infrared light detected by the infrared sensor based on the temperature of the detector detected by the calibration sensor. This improves the detection performance of the detector.

[0010] When setting up infrared sensors and lenses, different correspondences can be used between them. For example, in one optional scheme, there are multiple infrared sensors and multiple lenses, the same number as the number of infrared sensors, with each lens corresponding to one infrared sensor. Alternatively, there can be multiple infrared sensors and one lens; and multiple collimating apertures, each corresponding to one infrared sensor.

[0011] In one alternative embodiment, when there are multiple lenses, a first light-blocking layer is provided between the lenses to isolate light rays. This first light-blocking layer prevents crosstalk and ensures that the light rays passing through each lens are not interfered with.

[0012] In one alternative embodiment, when there is only one lens, the relative distance between the centerline of the collimating aperture and the centerline of the corresponding infrared sensor increases as the distance between the centerline of the corresponding infrared sensor and the centerline of the lens increases. This improves the effect of light illuminating the collimating aperture.

[0013] In an alternative embodiment, the system further includes a substrate and a package cover, the package cover being sealed to the substrate and enclosing a space for accommodating the infrared detector. The substrate and package cover serve as carrier components to support the collimating aperture and lens.

[0014] In one alternative embodiment, a second light-blocking layer is provided on the encapsulation cover; the collimation aperture is formed in the second light-blocking layer.

[0015] In an alternative embodiment, the lens is a protruding structure disposed on the encapsulation cover. This simplifies the detector's structure.

[0016] In one alternative, the lens is set independently and can be supported by the mobile terminal's bracket or housing.

[0017] In an alternative embodiment, the detector further includes a housing for isolating external ambient heat, with the collimating aperture and the infrared sensor located within the housing. This further improves the detection performance.

[0018] Secondly, a mobile terminal is provided, comprising a motherboard and a detector as described above, disposed on the motherboard; wherein the motherboard is electrically connected to an infrared sensor of the detector. In the above technical solution, the focusing effect of the lens enables the detector to detect human body temperature at a greater distance, and the collimating aperture removes ambient stray light, improving detection accuracy. Furthermore, using the collimating aperture as a light-filtering structure reduces the size of the detector, facilitating its miniaturization.

[0019] In an alternative embodiment, when the detector includes a controller, the controller is electrically connected to the motherboard. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the application scenarios of the detector;

[0021] Figure 2 A structural block diagram of the detector provided in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the detector structure provided in an embodiment of this application;

[0023] Figure 4This is a schematic diagram illustrating the application scenario of the detector provided in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the structure of a mobile terminal provided in an embodiment of this application;

[0025] Figure 6 This is a schematic diagram of another detector provided in an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of another detector provided in an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of another detector provided in an embodiment of this application;

[0028] Figure 9 This is a schematic diagram of another detector provided in an embodiment of this application;

[0029] Figure 10 This is a schematic diagram of another detector provided in an embodiment of this application;

[0030] Figure 11 This is a schematic diagram of another detector provided in an embodiment of this application;

[0031] Figure 12 This is a schematic diagram of another detector provided in an embodiment of this application;

[0032] Figure 13 This is a schematic diagram of another detector provided in an embodiment of this application. Detailed Implementation

[0033] The embodiments of this application will now be described in further detail with reference to the accompanying drawings.

[0034] To facilitate understanding of the detector used in the embodiments of this application, its application scenario will first be described. The detector provided in the embodiments of this application is applied to the field of body temperature detection. Figure 1 The illustration depicts a body temperature testing scenario. A detector 100 is positioned towards the forehead of the person being tested, and the body temperature is detected by measuring the temperature of the forehead. Existing technologies commonly use forehead thermometers for body temperature detection; however, forehead thermometers have a relatively short detection range and are quite large. Therefore, this application provides a detector 100 to improve temperature detection and achieve miniaturization. The following detailed description, in conjunction with specific accompanying drawings and embodiments, further clarifies this process.

[0035] Figure 2A structural block diagram of the detector provided in an embodiment of this application is shown. The detector includes a lens 10, a collimating aperture 20, and an infrared sensor 30. The lens 10, collimating aperture 20, and infrared sensor 30 are arranged along the optical path, with the collimating aperture 20 located in the middle, and the lens 10 and infrared sensor 30 located on either side of the collimating aperture 20. Light can pass through the lens 10 and the collimating aperture 20 and then illuminate the infrared sensor 30. The infrared sensor 30 can receive infrared rays from the light passing through the lens 10 and the collimating aperture 20, convert the infrared light signal into an electrical signal, and determine the temperature of the received infrared rays through the electrical signal. The body temperature of the subject can be determined by detecting the infrared temperature.

[0036] Lens 10 is used to converge external light, so as to focus the light outside the detector into the detector. Lens 10 can be of different types, as long as it can converge light. For example, lens 10 can be a double-convex lens, a single-convex lens, a prism, a multi-prism, or other different types of lenses.

[0037] Lens 10 does not filter light; external light passing through lens 10 includes light from the target area and light from other areas. The target area light refers to the area where the detection location of the subject is situated. Figure 1 The application scenario is illustrated. When the detector probes the forehead of a subject, the forehead area is the target area, and the light emitted from the forehead is the target area light. "Other area light" refers to light emitted from areas other than the target area. Taking a first and second subject as an example, when detecting the first subject, the light emitted from the target area of ​​the first subject is the target area light, and the infrared light emitted by the second subject is the "other area light." Similarly, when detecting the second subject, the infrared light emitted by the first subject is the "other area light."

[0038] To ensure detection accuracy, light from other areas should be prevented from illuminating the infrared sensor 30 during detection. Therefore, a collimating aperture 20 is provided in the optical path to allow for selective illumination of different areas. (Reference) Figure 2 As can be seen from the structure shown, the collimating aperture 20 and the lens 10 form a structure similar to a telescope. The diameter of the lens 10 is much larger than that of the collimating aperture 20, so that when the light from the target area and the light from other areas shine on the collimating aperture 20, only the light from the target area can pass through, while the light from other areas cannot pass through the collimating aperture 20.

[0039] As an alternative, when selecting light from the target area using the collimating aperture 20, the ratio of the diameter of the collimating aperture 20 to the diameter of the Airy disk is greater than or equal to 0.5 and less than or equal to 3. The Airy disk is a light spot formed at the focal point due to diffraction when a point source is imaged under diffraction-limited conditions. The center of the light spot is a bright circular spot surrounded by a set of weaker, concentric ring-shaped fringes of alternating light and dark areas. The central bright spot, bounded by the first dark ring, is called the Airy disk.

[0040] For example, the ratio of the diameter of the collimating aperture 20 to the diameter of the Airy disk can be different values ​​such as 0.5, 1, 2, 2.5, and 3. When the collimating aperture 20 adopts the above structure, it can allow light from the target area to pass through while blocking light from other areas.

[0041] Infrared sensor 30 is used to receive infrared light from the target area and detect temperature based on the infrared light. When infrared sensor 30 receives light from the target area passing through collimating aperture 20, the target area light contains infrared light as well as ambient stray light. However, during detection, only infrared light needs to be detected. Therefore, the detector uses infrared sensor 30, which can only receive infrared light and does not receive other ambient stray light, thus avoiding interference from ambient stray light. When infrared light shines on infrared sensor 30, the light signal can be converted into an electrical signal by infrared sensor 30, and the temperature of the detected object can be determined by detecting the electrical signal.

[0042] refer to Figure 3 , Figure 3 A schematic diagram of the detector provided in an embodiment of this application is shown. The lens 10 of the detector can be mounted on the housing or bracket of the mobile terminal. Figure 3 The example shows that the lens 10 is installed on the housing 60 of the mobile terminal, and external light can enter the housing 60 through the lens 10.

[0043] The detector includes a substrate 40 and a package cover 50. The substrate 40 serves as a carrier structure for the infrared sensor 30. It should be understood that a circuit layer is disposed on the substrate 40, and the infrared sensor 30 is electrically connected to the circuit layer of the substrate 40.

[0044] The substrate 40 is provided with a first groove 41 for accommodating the infrared sensor 30. The infrared sensor 30 is disposed in the first groove 41 and is fixedly connected to the substrate 40 by a cantilever 42 extending into the first groove 41, so as to minimize the contact between the infrared sensor 30 and other structures and avoid the temperature of other structures from interfering with the infrared sensor 30.

[0045] The encapsulation cover 50 covers the substrate 40 and has a second groove 51. The second groove 51 corresponds to the first groove 41 and together they form a space to accommodate the infrared sensor 30, thus preventing the infrared sensor 30 from contacting the substrate 40 and the encapsulation cover 50. Furthermore, the encapsulation cover 50 is sealed to the substrate 40, and a vacuum is evacuated from the space enclosed by the first groove 41 and the second groove 51 during sealing to form a vacuum seal, further reducing interference from the external environment to the infrared sensor 30. It should be understood that to ensure that light passing through the lens 10 can reach the infrared sensor 30, the encapsulation cover 50 can be made of infrared-transmitting materials such as silicon, germanium, ZnS, ZnSe, or chalcogenide glass. Taking silicon as an example, silicon itself has good transmittance in the 8-10µm wavelength infrared light range.

[0046] As an alternative, an antireflective coating can be added to the surface of the encapsulation cover to improve the transmittance of the encapsulation cover and extend the wavelength of transmitted light to above 8~12um.

[0047] The encapsulation cover 50 has a first surface, which is the surface of the encapsulation cover 50 facing away from the substrate 40. Light enters the encapsulation cover 50 from the first surface. A first light-blocking layer 70 is provided on the first surface. The first light-blocking layer 70 is provided with a first through-hole 71, which is located in the optical path. Light passing through the lens 10 can pass through the first through-hole 71 and enter the encapsulation cover 50, while light outside the optical path can be blocked by the first light-blocking layer 70. This reduces some of the ambient stray light illuminating the infrared sensor 30, thereby reducing interference with the infrared sensor 30. The first light-blocking layer 70 can be made of metal materials such as aluminum, nickel, titanium, gold, or copper, or coated with light-absorbing materials such as nano-carbon black. The diameter of the first through-hole 71 can be greater than, equal to, or less than the diameter of the lens 10, and is not specifically limited here. As an optional solution, the diameter of the first through-hole 71 is slightly smaller than the diameter of the lens 10.

[0048] A second light-blocking layer 80 is provided on the sidewall of the second groove 51 of the encapsulation cover 50, and a collimating aperture 20 is disposed on the second light-blocking layer 80. Light inside the encapsulation cover 50 can pass through the collimating aperture 20 to illuminate the infrared sensor 30, and the collimating aperture 20 selects the light in the target area, while the light in other areas is absorbed or reflected by the second light-blocking layer 80. For example, the second light-blocking layer 80 can be made of metal materials such as aluminum, nickel, titanium, gold, and copper, or coated with light-absorbing materials such as nano-carbon black.

[0049] The ratio of the diameter of the collimating aperture 20 to the diameter of the Airy disk is greater than or equal to 0.5 and less than or equal to 3. For example, the ratio of the diameter of the collimating aperture 20 to the diameter of the Airy disk can be different values ​​such as 0.5, 1, 2, 2.5, and 3. When the collimating aperture 20 adopts the above structure, it can allow light from the target area to pass through while blocking light from other areas.

[0050] As an optional solution, the detector also includes a housing 60 for isolating heat from the external environment, such as... Figure 3 As shown, the substrate 40 and the encapsulation cover 50 are both located within the housing 60. The collimating aperture 20 and the infrared sensor 30 are also located within the housing 60. The housing 60 isolates external heat, reducing the adverse effects of external heat on the detection results of the infrared sensor 30. For example, the housing 60 can be made of resin, plastic, or other common materials with low thermal conductivity. Alternatively, a heat-insulating layer can be coated on the inner wall of the housing 60 to further improve the heat insulation effect.

[0051] refer to Figure 4 , Figure 4 This diagram illustrates an application scenario of the detector provided in this embodiment. In use, the lens 10 is aimed at the subject, and the infrared light emitted by the subject passes through the lens 10 and then through the collimating aperture 20 to the infrared sensor 30 for detection. Although the collimating aperture 20 reduces the amount of light entering the sensor, the reduction in spatial sampling size improves the resolution of the image. Furthermore, using the collimating aperture 20 allows the detector to detect at greater distances.

[0052] refer to Figure 5 , Figure 5 A schematic diagram of the structure of a mobile terminal provided in an embodiment of this application is shown. The detector is disposed within the housing 200 of the mobile terminal, such as on a support 201, motherboard, or other structure that can support components within the housing 200. Figure 5 As can be seen, the lens 10 is supported by the housing 200, and the collimation aperture 20 and infrared sensor 30 are located inside the housing, so that the detector can be integrated into mobile terminals such as mobile phones and tablets with relatively small size.

[0053] refer to Figure 6 , Figure 6 It shows the basis Figure 3 The image shows a modified structure of the detector. Figure 6 Some of the labels in the text can be referenced. Figure 3 The same reference numerals are used in the same way, and will not be repeated here. Lens 10 can be integrated into the encapsulation cover 40. For example... Figure 6As shown, the part of the encapsulation cover 40 exposed in the first through hole 71 forms an arc-shaped convex structure facing outside the encapsulation cover 40. This arc-shaped convex serves as the lens 10 of the detector, thus making the structure of the entire detector more compact.

[0054] When specifically setting the lens 10 and the collimation small hole 20, the distance d from the lens 10 to the collimation small hole 20 can be approximately equal to the focal length f of the lens 10, and the distance d can be adjusted according to different design objectives during the setting. Exemplarily, the distance d between the collimation small hole 20 and the lens 10 can be greater than, equal to, or less than the focal length f of the lens 10. The following will explain different setting methods in combination with specific drawings. It should be understood that the straight lines with arrows shown in the following drawings represent the light rays at the edge of the detectable range of the detector.

[0055] Reference Figure 7 , Figure 7 shows a schematic diagram when d = f. When d = f, straight light rays can be received, thus obtaining the farthest detection distance, but the detection range of the detector is relatively narrow.

[0056] Reference Figure 8 , Figure 8 shows a schematic diagram when d < f. When d < f, the infrared sensor can receive more infrared light, improving the detection rate of the detector. When setting, the specific viewing angle of the detector can be designed according to actual requirements.

[0057] Reference Figure 9 , Figure 9 shows a schematic diagram when d > f. When d > f, within a specific detection distance range, the infrared sensor can improve the resolution of the detector.

[0058] Reference Figure 10 , Figure 10 shows another deformed structure of the detector based on Figure 9 shown. Figure 10 The partial reference numerals in Figure 9 can refer to the same reference numerals in Figure 10 and will not be elaborated here. The detector includes multiple infrared sensors, and the corresponding number of lens collimation small holes is multiple. The number of lenses is also multiple, and the multiple lenses correspond to the multiple infrared sensors one by one. In

[0059] As an optional solution, when there are multiple lenses, a first light-blocking layer 70 is provided between the multiple lenses to isolate light. The first light-blocking layer 70 is disposed on the first surface of the encapsulation cover 50. When light shines on the lens, the first light-blocking layer 70 avoids crosstalk of light and ensures that the light passing through each lens is not interfered with.

[0060] It should be understood that Figure 10 The detection areas corresponding to the first lens 11 and the second lens 12 shown are... Figure 9 The infrared sensors shown have the same detection area.

[0061] The number of infrared sensors provided in the embodiments of this application is not limited to... Figure 10 The two shown can also be three, four, or other different numbers. When using multiple infrared sensors, the sensors can be arranged in an array, and the corresponding collimating apertures and lenses are also arranged in an array. Furthermore, Figure 10 The setup of multiple infrared sensors shown can also be applied to... Figure 3 In the structure shown, when the lens adopts an independent structure, it is also possible to use multiple lenses, multiple infrared sensors, and multiple collimating apertures.

[0062] refer to Figure 11 , Figure 11 It shows Figure 10 The diagram shows a deformed structure. Figure 11 Some of the labels in the text can be referenced. Figure 10 The same label in. In Figure 11 In the structure shown, the first infrared sensor 31 and the second infrared sensor 32 share a third lens 14. Part of the light passing through the third lens 14 enters the first infrared sensor 31 through the first collimating aperture 21, and part of the light enters the second infrared sensor 32 through the second collimating aperture 22.

[0063] refer to Figure 11 As shown, the first infrared sensor 31 and the second infrared sensor 32 are positioned on either side of the centerline L1 of the third lens 14. The distance between the centerline H1 of the first collimating aperture 21 and the centerline G1 of the first infrared sensor 31 is d1, and the distance between the centerline H2 of the second collimating aperture 22 and the centerline G2 of the second infrared sensor 32 is d2. The distances d1 and d2 are related to the CRA angle of the lens that the first infrared sensor 31 can receive. When setting the first collimating aperture 21 and the second collimating aperture 22, the CRA angle can be set according to the corresponding receiving lenses of the first infrared sensor 31 and the second infrared sensor 32. Here, CRA (Chief Ray Angle) refers to the maximum angle from the lens to the infrared sensor side that can be focused onto the infrared sensor.

[0064] To facilitate understanding of the correspondence between infrared sensors and their corresponding collimating apertures, refer to... Figure 12 The structure shown is that of a detector employing multiple infrared sensors.

[0065] Figure 12 Some of the labels in the text can be referenced. Figure 10 The same label in. In Figure 12 In the structure shown, there are multiple infrared sensors, and these sensors are arranged in an array. Figure 12 The example illustrates the arrangement of a row of infrared sensors in an array. This 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 sensor 33 to the fifth infrared sensor 37 share a single lens 10.

[0066] The multiple collimating apertures corresponding to the aforementioned infrared sensors are offset according to the CRA angle requirements of the corresponding sensors relative to lens 10. To facilitate the description of the correspondence between the collimating apertures and their corresponding infrared sensors, the centerline of lens 10, the centerline of the infrared sensors, and the centerline of the collimating apertures are introduced. The relationship between the aforementioned infrared sensors and their corresponding collimating apertures satisfies the following: the relative distance between the centerline of the collimating aperture and the centerline of the corresponding infrared sensor increases as the distance between the centerline of the corresponding infrared sensor and the centerline of the lens increases.

[0067] refer to Figure 12 As shown, the center line G1 of the first infrared sensor 33 overlaps with the center line L1 of the lens 10, and the second infrared sensor 34, the third infrared sensor 35, the fourth infrared sensor 36, and the fifth infrared sensor 37 are symmetrically arranged on both sides of the first infrared sensor 33.

[0068] The centerline H1 of the first collimating aperture 23 overlaps with the centerline G1 of the first infrared sensor 33 and the centerline L1 of the lens 10. The centerline H2 of the second collimating aperture 24 is spaced d1 from the centerline G2 of the second lens 10, and the centerline H3 of the third collimating aperture 25 is spaced d2 from the centerline G3 of the third infrared sensor 35. Correspondingly, the centerline H4 of the fourth collimating aperture 26 is spaced d1 from the centerline G4 of the fourth infrared sensor 36, and the centerline H5 of the fifth collimating aperture 27 is spaced d2 from the centerline G5 of the fifth infrared sensor 37. Here, d2 > d1, ensuring that as the CRA angle of the sensor changes, the position of the corresponding collimating aperture relative to the infrared sensor also changes, so that light passing through the lens 10 can illuminate the infrared sensor.

[0069] refer to Figure 13 , Figure 13 It shows the basis Figure 9 The image shows a modified structure of the detector. Figure 13 Some of the labels in the text can be referenced. Figure 3 The same reference numerals are used in the same way. In addition to the infrared sensor 30 mentioned above, the detector also includes a calibration sensor 90. The calibration sensor 90 is used to detect the internal temperature of the detector. During setup, the calibration sensor 90 is set up in the same way as the infrared sensor 30. The substrate 40 is fixedly connected to the calibration sensor 90 via a cantilever, and both the substrate 40 and the encapsulation cover plate 50 are provided with grooves to avoid the calibration sensor 90. Furthermore, the calibration sensor 90 is also vacuum-sealed to ensure the sensitivity of its detection. During detection, the calibration sensor 90 can detect the internal temperature of the detector, and more accurately, its own temperature. Figure 13 It can be seen that the calibration sensor 90 and the infrared sensor 30 are in the same environment, so the temperature detected by the calibration sensor 90 can also be considered as the temperature of the infrared sensor 30.

[0070] The detector also includes a controller for calibrating the temperature of the infrared light 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 can obtain the calibrated temperature T0 = T1 - T2 based on these two detected temperatures. This allows the detector to obtain a more accurate calibration temperature.

[0071] This application embodiment also provides a mobile terminal, which includes a motherboard and a detector of any of the above-mentioned types disposed on the motherboard. The motherboard is electrically connected to the infrared sensor of the detector. Additionally, when the detector includes a controller, the controller is also electrically connected to the motherboard. In the above technical solution, the focusing effect of the lens enables the detector to detect human body temperature at a relatively long distance, and the collimating aperture removes ambient stray light, improving detection accuracy. Furthermore, using the collimating aperture as a light-filtering structure reduces the size of the detector, facilitating its miniaturization.

[0072] In an alternative embodiment, the mobile terminal also includes a housing with a through-hole into which the detector's lens can be fitted. The housing supports the detector's lens, further reducing the size of the detector within the mobile terminal.

[0073] As an optional solution, the detector provided in this application embodiment can also work in conjunction with the front or rear camera of a mobile terminal. Temperature measurement can be combined with the front or rear camera, allowing for simultaneous temperature measurement during selfies or rear-facing portrait shots.

[0074] As an alternative, the detector can also work in conjunction with the AI ​​(Artificial Intelligence) facial recognition of mobile terminals. When a user opens the mobile terminal using AI facial recognition, the mobile terminal can automatically record the user's personal health and body temperature monitoring data.

[0075] The detector provided in this application embodiment can also be integrated into a mobile terminal and work in conjunction with the depth information acquisition sensor of the mobile phone. When detecting body temperature, the depth information acquisition sensor detects the distance information of the subject, the detector detects the temperature information of the subject, and the collected depth information is used to calibrate the temperature measurement data.

[0076] In addition, the detector can also be used in the design of CIS (contact image sensor, scanner) for visible light photography / video recording to realize a lensless CIS imaging system.

[0077] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A detector, characterized in that, include: Lenses, collimating apertures, and infrared sensors are arranged along the optical path; among them, The lens is used to converge external light, which includes light from the target area and light from other areas; The collimation aperture is used to filter light from the target area and block light from other areas; The infrared sensor is used to receive infrared light from the target area and detect temperature based on the infrared light. It also includes a substrate and a package cover, wherein the package cover is sealed to the substrate and forms a space for accommodating the infrared sensor; The substrate is provided with a first groove and a cantilever extending into the first groove. The infrared sensor is located in the first groove and is fixedly connected to the substrate through the cantilever. The encapsulation cover has a first surface, which is a surface of the encapsulation cover that is away from the substrate. The first surface is provided with a first light-blocking layer, and the first light-blocking layer is provided with a first through hole, which is located in the optical path. The encapsulation cover is provided with a second groove, which corresponds to the first groove and forms a space to accommodate the infrared sensor; a second light-blocking layer is provided on the side wall of the second groove, and the collimation hole is provided in the second light-blocking layer.

2. The detector as described in claim 1, characterized in that, The ratio of the diameter of the collimating aperture to the diameter of the Airy disk is greater than or equal to 0.5 and less than or equal to 3.

3. The detector as described in claim 1 or 2, characterized in that, It also includes calibrating sensors and controllers; The calibration sensor is used to detect the internal temperature of the detector; The controller is used to calibrate the temperature of the infrared light detected by the infrared sensor based on the temperature of the detector detected by the calibration sensor.

4. The detector as described in claim 1 or 2, characterized in that, There are multiple infrared sensors, and the number of lenses is the same as the number of infrared sensors, with each lens corresponding to one infrared sensor.

5. The detector as described in claim 4, characterized in that, A first light-blocking layer is provided between each pair of adjacent lenses to isolate light.

6. The detector as described in claim 1 or 2, characterized in that, The number of infrared sensors is multiple, the number of lenses is one, and the number of collimating apertures is multiple; wherein, Each collimating aperture corresponds to one of the infrared sensors, and the relative distance between the centerline of the collimating aperture and the centerline of the corresponding infrared sensor increases as the distance between the centerline of the corresponding infrared sensor and the centerline of the lens increases.

7. The detector as described in claim 1 or 2, characterized in that, The lens is a protruding structure disposed on the encapsulation cover.

8. The detector as described in claim 1 or 2, characterized in that, It also includes a housing for isolating external ambient heat, and the collimating aperture and the infrared sensor are located inside the housing.

9. A mobile terminal, characterized in that, It includes a motherboard and a detector as described in any one of claims 1 to 8 disposed on the motherboard; wherein the motherboard is electrically connected to the infrared sensor of the detector.

10. The mobile terminal as described in claim 9, characterized in that, When the detector includes a controller, the controller is electrically connected to the motherboard.

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