CN115077707A - Temperature sensing module and electronic device - Google Patents

Abstract

A temperature sensing module comprises a hollow base, an infrared temperature sensor and a condensing lens. The hollow base comprises a through hole, a first end and a second end, the first end comprises a first opening, the second end is provided with a second opening, and the through hole is communicated between the first opening and the second opening. The infrared temperature sensor is arranged in the through hole and adjacent to the second opening, and comprises a photosensitive surface facing the first opening. The condensing lens is arranged in the through hole and is adjacent to the first opening, and the condensing lens corresponds to the light-sensitive surface of the infrared temperature sensor.

Description

Temperature sensing module and electronic device

Technical Field

The present invention relates to a sensing module, and more particularly, to a temperature sensing module and an electronic device.

Background

Currently, the common body temperature measuring tools can be classified into contact type and non-contact type, and the contact type tools, such as a mercury thermometer or an electronic rapid thermometer, are used to measure the body temperature by contacting a human body part (such as the mouth or the armpit). Non-contact tools, such as ear or forehead guns, perform body temperature measurements by approaching and aiming at the ears or forehead of the human body.

However, in either of the above manners, the body temperature measuring tool must be carried when the user goes out to measure and monitor the body temperature condition of the user at any time, which causes inconvenience and inconvenience to the user.

For example, as shown in fig. 1, most of the conventional forehead thermometers use the infrared temperature sensor P1 for measurement, however, the field of view f (field of view) of the infrared temperature sensor P1 in the conventional forehead thermometers is more than 45 °, so the forehead thermometers need to be very close to the forehead of the user for measurement (for example, the measurement distance D1 is less than 5 cm).

Disclosure of Invention

In view of the foregoing, in one embodiment, a temperature sensing module is provided and includes a hollow base, an infrared temperature sensor, and a condensing lens. The hollow base comprises a through hole, a first end and a second end, wherein the first end and the second end are opposite to each other, the first end is provided with a first opening, the second end is provided with a second opening, and the through hole is communicated between the first opening and the second opening. The infrared temperature sensor is arranged in the through hole and adjacent to the second opening, and comprises a photosensitive surface facing the first opening. The condensing lens is arranged in the through hole and is adjacent to the first opening, and the condensing lens corresponds to the light-sensitive surface of the infrared temperature sensor.

In another embodiment, an electronic device is provided that includes a display and a temperature sensing module. The display comprises a display screen and a frame located around the display screen, and the frame is provided with an opening. The temperature sensing module is arranged in the frame and corresponds to the opening, and the temperature sensing module comprises a hollow base, an infrared temperature sensor and a condensing lens. The hollow base comprises a through hole, a first end and a second end, wherein the first end and the second end are opposite, the first end is provided with a first opening, the second end is provided with a second opening, the through hole is communicated between the first opening and the second opening, and the first opening is adjacent to the opening hole relative to the second opening. The infrared temperature sensor is arranged in the through hole and adjacent to the second opening, and comprises a photosensitive surface facing the first opening. The condensing lens is arranged in the through hole and is adjacent to the first opening, and the condensing lens corresponds to the light-sensitive surface of the infrared temperature sensor.

In summary, according to the temperature sensing module of the embodiment of the invention, the condensing lens corresponds to the photosensitive surface of the infrared temperature sensor, so that the overall measurement angle or the view field of the temperature sensing module can be reduced to increase the measurable distance, and the temperature sensing module can be applied to a commonly used electronic device (such as a smart phone, a tablet computer or a display screen) to measure the body temperature remotely, and therefore, a user can measure and monitor the body temperature condition of the user at any time without additionally carrying a body temperature measuring tool when going out.

Drawings

Fig. 1 is a schematic view showing a conventional infrared temperature sensor.

Fig. 2 is a perspective view of an electronic device according to an embodiment of the invention.

FIG. 3 is a schematic diagram of an electronic device according to an embodiment of the invention.

FIG. 4 is a cross-sectional view of an electronic device according to an embodiment of the invention.

FIG. 5 is a cross-sectional view of another embodiment of a temperature sensing module according to the present invention.

FIG. 6 is a cross-sectional view of another embodiment of a temperature sensing module according to the present invention.

Wherein, the reference numbers:

p1 infrared temperature sensor

Field of view F

D1 distance measurement

1 electronic device

10 display

11 display screen

12 rims

13, 13' opening

14 outer cover

20 temperature sensing module

21 hollow base

22 through hole

23 first end

231 first opening

24 second end

241 second opening

25 infrared ray temperature sensor

251 light-sensitive surface

26,26a,26b condenser lens

261 first surface

262 second surface

263 coating layer

27a,27b first lens

28a,28b second lens

27c third lens

28c fourth lens

29 lens barrel

291 shading plate

292 light transmission opening

30 circuit board

31 inner surface

40 camera module

M measuring angle

D2 distance measurement

Detailed Description

Various embodiments are described in detail below, however, the embodiments are only used as examples and do not limit the scope of the invention. In addition, the drawings in the embodiments omit some components to clearly show the technical features of the present invention. The same reference numbers will be used throughout the drawings to refer to the same or like elements.

Fig. 2 is a perspective view, fig. 3 is a schematic view illustrating an electronic device according to an embodiment of the invention, and fig. 4 is a cross-sectional view illustrating the electronic device according to an embodiment of the invention. As shown in fig. 2 to 4, in the present embodiment, the electronic device 1 is a notebook computer, for example, the electronic device 1 includes a display 10 and a temperature sensing module 20, and the temperature sensing module 20 is mounted on the display 10 for sensing the temperature of the human body. However, the above embodiments are only examples, and in other embodiments, the electronic device 1 may also be a smart phone, a tablet computer, a personal digital assistant (personal digital assistant), a display screen, or other portable electronic products.

As shown in fig. 2 to 4, in the present embodiment, the display 10 includes a display screen 11 and a frame 12 located around the display screen 11, one side of the frame 12 is provided with an opening 13, and the temperature sensing module 20 is disposed in the frame 12 and corresponds to the opening 13, so that the temperature sensing module 20 is not shielded by the frame 12 to perform the function of sensing the temperature of the human body.

As shown in fig. 2 to 4, the temperature sensing module 20 includes a hollow base 21, an infrared temperature sensor 25, and a condensing lens 26. In the embodiment, the hollow base 21 includes a through hole 22 and a first end 23 and a second end 24 opposite to the through hole 22, the first end 23 has a first opening 231, the second end 24 has a second opening 241, the first opening 231 faces the opening 13 of the frame 12 of the display 10, and the first opening 231 is adjacent to the opening 13 relative to the second opening 241, that is, the distance from the first opening 231 to the opening 13 is smaller than the distance from the second opening 241 to the opening 13. The through hole 22 is connected between the first opening 231 and the second opening 241, so that the hollow base 21 is in a ring shape, wherein the shape of the through hole 22 may be a circular hole, an elliptical hole, a square hole or other irregular holes, which is not limited.

As shown in fig. 2 to 4, the infrared temperature sensor 25(Far infrared sensor) is disposed in the through hole 22 and adjacent to the second opening 241, that is, the distance from the infrared temperature sensor 25 to the first opening 231 is greater than the distance from the infrared temperature sensor 25 to the second opening 241. In some embodiments, the infrared temperature sensor 25 may be a pyroelectric type infrared sensor or a quantum type infrared sensor.

As shown in fig. 4, the infrared temperature sensor 25 includes a light-sensing surface 251, and the light-sensing surface 251 faces the first opening 231, so that the light-sensing surface 251 of the infrared temperature sensor 25 can receive infrared rays transmitted by an external object to measure the surface temperature of the external object according to the amount of the infrared rays, for example, the greater the amount of the infrared rays received by the light-sensing surface 251 of the infrared temperature sensor 25, the greater the measured surface temperature of the external object.

As shown in fig. 2 to 4, the condensing lens 26 is disposed in the through hole 22 and adjacent to the first opening 231, and in some embodiments, the condensing lens 26 may be made of glass or optical-grade transparent plastic. In addition, the condensing lens 26 corresponds to the light-sensing surface 251 of the infrared temperature sensor 25, so that the infrared rays transmitted by the external object enter the opening 13 of the frame 12 of the display 10 and are then transmitted to the light-sensing surface 251 of the infrared temperature sensor 25 after being condensed by the condensing lens 26, thereby reducing the overall measurement angle of the temperature sensing module 20 to increase the measurable distance.

In summary, referring to fig. 1, a schematic view of a conventional infrared temperature sensor is shown, in which a field of view f (field of view) of the conventional infrared temperature sensor P1 is more than 45 °, and therefore, a product (e.g., a forehead thermometer) applied to the infrared temperature sensor P1 needs to be very close to the forehead of a human body for measurement (e.g., the measurement distance D1 is less than 5 cm). Referring to fig. 4, the electronic device 1 of the embodiment of the invention corresponds to the light-sensing surface 251 of the infrared temperature sensor 25 through the condensing lens 26, so that the infrared rays transmitted by the external object enter from the opening 13 of the frame 12 of the display 10, and then are condensed by the condensing lens 26 before being transmitted to the light-sensing surface 251 of the infrared temperature sensor 25, thereby greatly reducing the measurement angle M of the temperature sensing module 20, for example, the measurement angle M can be reduced to 6 ° to 10 ° and is much smaller than the view F of the existing infrared temperature sensor P1. Therefore, the measurement distance D2 of the temperature sensing module 20 can be greatly increased based on the reduction of the measurement angle M of the temperature sensing module 20, for example, the measurement distance D2 can be increased to more than 40cm and is much larger than the measurement distance D1 of the existing infrared temperature sensor P1, so that the temperature sensing module 20 of the embodiment of the invention can be applied to a commonly-used electronic device 1 (such as a smart phone, a tablet computer or a display screen) to measure the temperature of a human body in a long distance, and a user can measure and monitor the temperature condition of the user at any time without additionally carrying a body temperature measuring tool when going out.

In some embodiments, the condenser lens 26 may be a thick lens with a thin edge at the center to have a light condensing function, for example, the condenser lens 26 may be a biconvex lens, a plano-convex lens, or a meniscus lens. As shown in fig. 4, in the present embodiment, the condenser lens 26 includes a first surface 261 and a second surface 262 opposite to each other, and both the first surface 261 and the second surface 262 are convex surfaces to form the condenser lens 26 as a biconvex lens, but this is not limited thereto, and in other embodiments, one of the first surface 261 and the second surface 262 of the condenser lens 26 may be a convex surface and the other is a flat surface. Alternatively, one of the first surface 261 and the second surface 262 of the condenser lens 26 may be convex and the other may be concave.

As shown in fig. 4, in the present embodiment, a coating layer 263 is further disposed on the surface of the condenser lens 26 to improve the light transmittance of the condenser lens 26, and the coating layers 263 are disposed on both the first surface 261 and the second surface 262 of the condenser lens 26, so as to improve the accuracy of temperature sensing of the temperature sensing module 20. In some embodiments, the condenser lens 26 may also have a coating 263 on the first surface 261 or a coating 263 on the second surface 262, for example, assuming that the light transmittance of the condenser lens 26 is about 91-92%, 94-95% light transmittance can be achieved if one of the surfaces of the condenser lens 26 is coated with the coating 263, and 98-99% light transmittance can be achieved if both surfaces of the condenser lens 26 are coated with the coatings 263.

As shown in fig. 2 to 4, in the present embodiment, a cover 14 is further disposed in the opening 13 of the frame 12 of the display 10 to protect the temperature sensing module 20, and infrared rays transmitted by an external object can still pass through the cover 14 to be transmitted to the infrared temperature sensor 25 for temperature sensing. In some embodiments, the cover 14 may be a filter, and the filter may allow infrared rays within a specific wavelength range (e.g., specific wavelength range of 6000nm to 12000nm) to pass through the cover 14 and be transmitted to the infrared temperature sensor 25, so as to filter out infrared rays of other wavelengths, thereby obtaining a desired human body temperature value and improving the accuracy of the temperature sensing module 20.

As shown in fig. 2 to 4, the temperature sensing module 20 may include a circuit board 30, the second end 24 of the hollow base 21 is fixedly disposed on the circuit board 30, and the infrared temperature sensor 25 is disposed on the inner surface 31 of the circuit board 30 in the through hole 22, so that external light cannot enter from the second opening 241 of the second end 24 of the hollow base 21, and the sensing accuracy of the infrared temperature sensor 25 is not affected by the external light.

As shown in fig. 2 to 4, in the embodiment, the electronic device 1 further includes a camera module 40, so that the electronic device 1 has functions of taking pictures or network videos, and the camera module 40 and the temperature sensing module 20 can be fixed on the same circuit board 30, so as to reduce the configuration space. In this embodiment, the frame 122 of the display 10 further has another opening 13 ', the opening 13 ' and the opening 13 are disposed side by side, and the camera module 40 is disposed in the frame 12 and corresponds to the opening 13 ', so that the camera module 40 can be shielded by the frame 12 to perform the image capturing function.

As shown in fig. 2 to 4, the condensing lens 26 can be assembled in the through hole 22 and adjacent to the first opening 231 through the lens barrel 29, in this embodiment, the condensing lens 26 is fixed in the lens barrel 29, and the lens barrel 29 is assembled with the first end 23 of the hollow base 21, wherein the outer wall of the lens barrel 29 and the inner wall of the through hole 22 of the hollow base 21 are provided with male and female threads which are matched with each other, so that the lens barrel 29 can be screwed and fixed in the through hole 22 of the hollow base 21. In some embodiments, the lens barrel 29 and the hollow base 21 can be assembled and fixed with each other by other methods such as adhesion, snap fit, or welding.

As shown in fig. 2 to 4, in the present embodiment, an end of the lens barrel 29 away from the infrared temperature sensor 25 includes a light shielding plate 291, the light shielding plate 291 has a light transmitting opening 292, the size of the light transmitting opening 292 is smaller than the size of the first opening 231, wherein the size of the light transmitting opening 292 may correspond to the measurement angle M of the temperature sensing module 20, and other light rays exceeding the measurement angle M range may be blocked by the light shielding plate 291 to prevent other stray light from being transmitted to the infrared temperature sensor 25 to affect the sensing effect.

In some embodiments, the condenser lens 26 may be a single lens or a plurality of lenses. As shown in fig. 5, which is a cross-sectional view of another embodiment of the temperature sensing module of the present invention, the difference between the present embodiment and the above-mentioned fig. 4 is at least that the condensing lens 26a of the present embodiment includes a first lens 27a and a second lens 28a, and the first lens 27a and the second lens 28a are stacked with each other, so that the temperature sensing module 20 can generate more different measurement angles M and measurement distances D2 (please refer to fig. 4) through the matching combination of the first lens 27a and the second lens 28a, so as to correspond to the use distances of different electronic devices 1. For example, the first lens 27a and the second lens 28a may be the same lens, or as shown in fig. 5, the first lens 27a and the second lens 28a may be different lenses, such as the first lens 27a and the second lens 28a have different thicknesses, surface curvatures, and shapes, so as to generate more different measurement angles M and measurement distances D2.

By way of further example, as shown in fig. 4, when the condenser lens 26 is a single lens, the measurement angle M generated by the surface curvature or thickness variation of the condenser lens 26 is 6 ° to 10 °, and the corresponding measurement distance D2 is 40cm to 50 cm. Referring to fig. 5, when the condenser lens 26a includes the first lens 27a and the second lens 28a, the measurement angle M that can be generated by the combination of the first lens 27a and the second lens 28a can be increased to 5 ° to 11 °, and the corresponding measurement distance D2 is 35cm to 55cm, so that more different measurement angles M and measurement distances D2 can be generated as the number of lenses of the condenser lens 26a is increased, so as to correspond to more different electronic devices 1.

As shown in fig. 6, which is a cross-sectional view of another embodiment of the temperature sensing module of the present invention, the difference between the embodiment and the embodiment of fig. 5 is at least that the condensing lens 26b of the present embodiment includes four lenses (a first lens 27b, a second lens 28b, a third lens 27c and a fourth lens 28c), and the first lens 27b, the second lens 28b, the third lens 27c and the fourth lens 28c are stacked on top of each other, so that more different arrangement combinations can be generated by increasing the number of lenses of the condensing lens 26b, and more different measurement angles M and measurement distances D2 can be generated to be suitable for more different types of electronic devices 1. In some embodiments, the number of the condenser lenses 26b may also be three or more, which is not limited.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit of the invention.

Claims (20)

1. A temperature sensing module, comprising:

the hollow base comprises a through hole, a first end and a second end, wherein the first end and the second end are opposite to each other, the first end is provided with a first opening, the second end is provided with a second opening, and the through hole is communicated between the first opening and the second opening;

the infrared temperature sensor is arranged in the through hole and is adjacent to the second opening, the infrared temperature sensor comprises a photosensitive surface, and the photosensitive surface faces the first opening; and

and the condensing lens is arranged in the through hole and is adjacent to the first opening, and the condensing lens corresponds to the light sensing surface of the infrared temperature sensor.

2. The temperature sensing module of claim 1, further comprising a circuit board, wherein the second end of the hollow base is fixedly disposed on the circuit board, and the infrared temperature sensor is disposed on an inner surface of the circuit board within the through hole.

3. The temperature sensing module of claim 1, further comprising a barrel, the barrel being disposed at the first end of the hollow base, the condenser lens being disposed within the barrel.

4. The temperature sensing module of claim 3, wherein an end of the lens barrel distal from the infrared temperature sensor includes a light blocking plate having a light transmissive opening, the light transmissive opening being smaller in size than the first opening.

5. The temperature-sensing module of claim 1, wherein the condenser lens comprises first and second opposing surfaces, the first surface being convex.

6. The temperature-sensing module of claim 5, wherein the second surface is convex or concave.

7. The temperature sensing module of claim 1, wherein the condenser lens comprises a first lens and a second lens, the first lens and the second lens being disposed on top of each other.

8. The temperature sensing module of claim 7, wherein the first lens is different from the second lens.

9. The temperature sensing module of claim 1, wherein the surface of the condenser lens is further coated.

10. An electronic device, comprising:

the display comprises a display screen and a frame positioned around the display screen, wherein the frame is provided with an opening; and

the temperature sensing module, set up in the frame and corresponding to the trompil, the temperature sensing module includes:

the hollow base comprises a through hole and a first end and a second end which are opposite to each other, the first end is provided with a first opening, the second end is provided with a second opening, the through hole is communicated between the first opening and the second opening, and the first opening is adjacent to the open hole relative to the second opening;

the infrared temperature sensor is arranged in the through hole and is adjacent to the second opening, the infrared temperature sensor comprises a light sensing surface, and the light sensing surface faces the first opening; and

and the condensing lens is arranged in the through hole and is adjacent to the first opening, and the condensing lens corresponds to the light sensing surface of the infrared temperature sensor.

11. The electronic device of claim 10, wherein a cover is further disposed within the opening.

12. The electronic device of claim 11, wherein the cover is a filter.

13. The electronic device of claim 10, further comprising a circuit board, wherein the second end of the hollow base is fixedly disposed on the circuit board, and the infrared temperature sensor is disposed on an inner surface of the circuit board within the through hole.

14. The electronic device of claim 13, further comprising a camera module, the camera module being fixedly mounted on the circuit board.

15. The electronic device of claim 10, further comprising a lens barrel, wherein the lens barrel is assembled at the first end of the hollow base, and the condenser lens is disposed in the lens barrel.

16. The electronic device of claim 15, wherein an end of the lens barrel remote from the infrared temperature sensor includes a light blocking plate having a light transmissive opening, the light transmissive opening being smaller in size than the second opening.

17. The electronic device of claim 10, wherein the condenser lens comprises first and second opposing surfaces, the first surface being convex.

18. The electronic device of claim 17, wherein the second surface is convex or concave.

19. The electronic device of claim 10, wherein the condenser lens comprises a first lens and a second lens, the first lens and the second lens being disposed on top of each other.

20. The electronic device of claim 19, wherein the first lens is different from the second lens.

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