PPG packaging module and electronic equipment

Abstract

The utility model discloses a PPG packaging module and electronic equipment. The PPG packaging module comprises a packaging substrate, a packaging rear shell, a plurality of retaining wall structures, at least one light emitting module, at least one light receiving module and a light-transmitting protection layer, the packaging rear shell is fixedly installed on the packaging substrate, and a wrapping cavity is formed between the packaging rear shell and the packaging substrate. Two ends of the plurality of retaining wall structures are respectively connected with the upper surface of the packaging substrate and the packaging rear shell, and the packaging cavity is divided into a plurality of cavities; the light emitting module and the light receiving module are arranged on the packaging substrate and are arranged in the plurality of cavities in a staggered manner; the light-transmitting protective layer is arranged in the cavity. According to the PPG module, through the arrangement, light emitted by the light emitting module can be received by the light receiving module only by penetrating through the light-transmitting protective layer and then being reflected by the skin, so that the refraction times required during light conduction are effectively reduced, the optical efficiency of the PPG module is improved, and the purpose of reducing the power consumption of a system is achieved.

Description

Technical Field

[0001] The utility model relates to the field of electronic equipment, in particular to a PPG packaging module and electronic equipment. Background Art

[0002] At present, with the development of terminal technology, terminal devices have become a part of people's work and life. In order to meet the needs of users for their own health management, many terminal devices can support the user's human body data monitoring function. For example, users can use wearable devices such as smart watches to measure human characteristics such as heart rate, respiratory rate or blood oxygen.

[0003] Typically, a terminal device may be configured with a photoplethysmography (PPG) module for measuring human characteristics. The PPG module mainly includes a light emitting diode (light source) and a light detector. The detection principle is as follows: a light signal is emitted by an LED. After the light signal is transmitted to the skin, part of the light signal will be absorbed by human tissue (including blood) inside the skin, and part of the light signal will be scattered and reflected. A part of the scattered and reflected light signal will be received by the PD and converted into an electrical signal. Among them, the scattered and reflected light signal will show regular changes with the pulsation of the human pulse. The changes in the electrical signal detected by the PD can detect the changes in the pulse wave, and then the heart rate, blood oxygen and other data can be determined based on the changes in the pulse wave.

[0004] However, at present, the PPG modules in the industry basically use a two-color injection molded back shell, with standard LED and PD devices, assembled together to achieve the transmission and reception of optical signals. This structure will cause a gap of about 0.3mm between the LED & PD surface and the back shell lens. The light emitted by the LED chip first enters the encapsulated resin or glass layer, then enters the air layer, and then enters the back shell lens from the air layer, and finally reaches the human body, and is received by the PD after being reflected by the skin. Since the light is refracted by three different media before reaching the skin, and then reflected by the skin and refracted by three media before being received by the PD, the light energy loss is large and the overall optical efficiency is low.

[0005] Therefore, a PPG packaging module and an electronic device are needed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a PPG packaging module and an electronic device, so as to improve the optical efficiency of the PPG module by optimizing the optical design, thereby achieving the purpose of reducing system power consumption, increasing product endurance and improving accuracy.

[0007] In order to solve the above technical problems, the utility model provides a PPG packaging module, including a packaging substrate, a packaging rear shell, a plurality of retaining wall structures, at least one light transmitting module and a light receiving module, and a light-transmitting protective layer;

[0008] The packaging rear shell is fixedly mounted on the packaging substrate, and forms a wrapping chamber between the packaging rear shell and the packaging substrate;

[0009] Two ends of the plurality of retaining wall structures are respectively connected to the upper surface of the packaging substrate and the packaging rear shell, and divide the package chamber into a plurality of cavities;

[0010] The optical transmitting module and the optical receiving module are both arranged on the packaging substrate and are staggered in the plurality of cavities;

[0011] The light-transmitting protective layer is disposed in the cavity and can wrap the light-emitting module or the light-receiving module.

[0012] Furthermore, the light-transmitting protective layer is configured as a silicone lens.

[0013] Furthermore, the silicone lens includes transparent silicone that can be poured into the cavity.

[0014] Furthermore, the retaining wall structure includes a light-absorbing shell and a light-isolating foam connected in sequence from top to bottom;

[0015] The light absorbing shell is fixedly connected to the top wall of the inner cavity of the packaging rear shell;

[0016] The light-isolating foam is fixedly connected to the packaging substrate.

[0017] Furthermore, the light absorbing shell is set to be black.

[0018] Furthermore, the height of the light-isolating foam is one-third to two-thirds of the height of the light emitting module.

[0019] Furthermore, the light emitting module includes at least one LED light emitting chip.

[0020] Furthermore, the light receiving module includes at least one PD photosensitive chip.

[0021] On the other hand, the utility model also provides an electronic device, including a circuit board and the PPG packaging module described in the above embodiment;

[0022] The packaging substrate is disposed on the circuit board and is electrically connected to the circuit board.

[0023] Furthermore, the electronic device includes a smart wearable device.

[0024] Compared with the prior art, the utility model has at least the following beneficial effects:

[0025] By arranging a light-transmitting protective layer in the cavity formed by the packaging substrate, the packaging back shell and the baffle structure, the light emitted by the light transmitting module only needs to pass through the light-transmitting protective layer and then be received by the light receiving module after being reflected by the skin. Compared with the method in the prior art that needs to pass through the packaging layer, the air layer and the back shell lens in sequence, the method adopted by this device has fewer refraction times, so it can effectively improve the optical efficiency of the PPG module, thereby achieving the purpose of reducing system power consumption, increasing product endurance and improving accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a PPG packaging module in one embodiment of the utility model.

[0027] Figure numbers: 1. packaging substrate; 2. packaging back shell; 3. retaining wall structure; 31. light-absorbing shell; 32. light-isolating foam; 4. light-emitting module; 5. light-receiving module; 6. light-transmitting protective layer; 7. circuit board. DETAILED DESCRIPTION

[0028] The PPG packaging module and electronic device of the present invention will be described in more detail below in conjunction with the schematic diagram, which shows the preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein and still achieve the beneficial effects of the present invention. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the present invention.

[0029] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0030] Embodiment 1

[0031] like Figure 1 As shown, an embodiment of the utility model proposes a PPG packaging module, including a packaging substrate 1, a packaging back shell 2, a plurality of retaining wall structures 3, at least one light emitting module 4 and a light receiving module 5, and a light-transmitting protective layer 6.

[0032] The packaging rear shell 2 is fixedly mounted on the packaging substrate 1 , and forms a packaging chamber between the packaging rear shell 2 and the packaging substrate 1 for packaging and protecting the optical transmitting module 4 and the optical receiving module 5 .

[0033] In addition, two ends of the plurality of retaining wall structures 3 are respectively connected to the upper surface of the packaging substrate 1 and the packaging rear shell 2 , and divide the package chamber into a plurality of cavities.

[0034] The plurality of cavities are used to install the light emitting module 4 and the light receiving module 5 respectively, and the retaining wall structure 3 is used to prevent interference between the light emitting module 4 and the light receiving module 5 .

[0035] Specifically, the optical transmitting module 4 and the optical receiving module 5 are both arranged on the packaging substrate 1 and are staggered in the plurality of cavities, that is, the optical transmitting module 4 and the optical receiving module 5 are sequentially and staggeredly arranged in the plurality of cavities.

[0036] The light-transmitting protective layer 6 is disposed in the cavity and can wrap the light-emitting module 4 or the light-receiving module 5 .

[0037] The device sets a light-transmitting protective layer 6 in the cavity formed by the packaging substrate 1, the packaging rear shell 2 and the retaining wall structure 3, so that the light emitted by the light transmitting module 4 only needs to pass through the light-transmitting protective layer 6 and then be received by the light receiving module 5 after being reflected by the skin. Compared with the method in the prior art that needs to pass through the packaging layer, the air layer and the rear shell lens in sequence, the method adopted by the device has fewer refraction times, so it can effectively improve the optical efficiency of the PPG module, thereby achieving the purpose of reducing system power consumption, increasing product endurance and improving accuracy.

[0038] In this embodiment, the light-transmitting protective layer 6 is further defined so as to facilitate better penetration of the light emitted by the light emitting module 4. Specifically, the light-transmitting protective layer 6 is configured as a silicone lens.

[0039] It should be particularly noted that the silicone lens includes transparent silicone that can be poured into the cavity. The transparent silicone is used to form a silicone lens for the penetration of the light emitting module 4 and the reception of the light receiving module 5. In addition, since the transparent silicone has certain expansion and contraction buffering properties, it can also wrap and protect the light emitting module 4 and the light receiving module 5, thereby improving the stability of the product during use.

[0040] In other embodiments, a specific retaining wall structure 3 is further provided to enhance the separation effect between the light emitting module 4 and the light receiving module 5 to prevent interference of light therebetween.

[0041] Specifically, the retaining wall structure 3 includes a light-absorbing shell 31 and a light-isolating foam 32 which are sequentially connected from top to bottom.

[0042] Among them, the light-absorbing shell 31 is fixedly connected to the top wall of the inner cavity of the packaging rear shell 2, and the light-isolating foam 32 is fixedly connected to the packaging substrate 1, that is, the light-emitting module 4 and the light-receiving module 5 are separated by the retaining wall structure 3 formed by the light-absorbing shell 31 and the light-isolating foam 32, thereby ensuring the normal operation of the PPG module.

[0043] It should be noted that the light absorbing housing 31 is set to be black. Since black has the property of absorbing light, it can ensure that the light between the light emitting module 4 and the light receiving module 5 will not interfere with each other.

[0044] In other embodiments, the height of the light-isolating foam 32 is further limited to further enhance the light-isolating effect. The height of the light-isolating foam 32 is one-third to two-thirds of the height of the light-emitting module 4 .

[0045] It should be noted that, in this example, the light emitting module 4 includes at least one LED light emitting chip, and the light receiving module 5 includes at least one PD photosensitive chip.

[0046] Embodiment 2

[0047] Please continue reading Figure 1 Based on the first embodiment, this embodiment further proposes an electronic device to complete the function of monitoring the user's health.

[0048] Specifically, an electronic device includes a circuit board 7 and the PPG packaging module described in Example 1.

[0049] The packaging substrate 1 is disposed on the circuit board 7 and is electrically connected to the circuit board 7 .

[0050] It should be noted that the electronic devices include smart wearable devices, such as watches and bracelets.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A PPG packaging module, characterized in that: It includes a packaging substrate, a packaging rear shell, a plurality of retaining wall structures, at least one light transmitting module and a light receiving module, and a light-transmitting protective layer; The packaging rear shell is fixedly mounted on the packaging substrate, and forms a wrapping chamber between the packaging rear shell and the packaging substrate; Two ends of the plurality of retaining wall structures are respectively connected to the upper surface of the packaging substrate and the packaging rear shell, and divide the package chamber into a plurality of cavities; The optical transmitting module and the optical receiving module are both arranged on the packaging substrate and are staggered in the plurality of cavities; The light-transmitting protective layer is disposed in the cavity and can wrap the light-emitting module or the light-receiving module.

2. The PPG packaging module according to claim 1, characterized in that: The light-transmitting protective layer is configured as a silicone lens.

3. The PPG packaging module according to claim 2, characterized in that: The silicone lens includes transparent silicone that can be poured into the cavity.

4. The PPG packaging module according to claim 3, characterized in that: The retaining wall structure comprises a light-absorbing shell and light-isolating foam connected in sequence from top to bottom; The light absorbing shell is fixedly connected to the top wall of the inner cavity of the packaging rear shell; The light-isolating foam is fixedly connected to the packaging substrate.

5. The PPG packaging module according to claim 4, characterized in that: The light absorbing shell is set to be black.

6. The PPG packaging module according to claim 4, characterized in that: The height of the light-isolating foam is one third to two thirds of the height of the light emitting module.

7. The PPG packaging module according to any one of claims 1 to 6, characterized in that: The light emitting module includes at least one LED light emitting chip.

8. The PPG packaging module according to any one of claims 1 to 6, characterized in that: The light receiving module includes at least one PD photosensitive chip.

9. An electronic device, characterized in that: A circuit board and a PPG packaging module as claimed in any one of claims 1 to 8; The packaging substrate is disposed on the circuit board and is electrically connected to the circuit board.

10. The electronic device according to claim 9, characterized in that: The electronic device includes a smart wearable device.

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