Membrane applied to intelligent wearable equipment and provided with optical microstructure

Abstract

The utility model provides a diaphragm applied to intelligent wearable equipment and provided with an optical microstructure, an optical lens and the technical field of intelligent wearing, and aims to solve the problems that when the intelligent wearable equipment in the prior art is used, only detection light with a single focal length can be formed when an LED lamp and a Fresnel lens are combined for heart rate monitoring and blood oxygen monitoring; in order to solve the problems that different biological characteristics cannot be detected, and a Fresnel lens is thick, has bulges and cannot be tightly attached to the skin of a detected object, so that the measurement precision is inaccurate and the use is relatively inconvenient, the micro-lens sensor comprises a transparent layer, a shading layer, a PET film layer, a micro-lens film layer and a circuit layer which are sequentially arranged from top to bottom, and a dot-matrix micro-lens structure is arranged on the micro-lens film layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical lenses and smart wearable devices, and more specifically, particularly relates to a diaphragm with an optical microstructure that is applied to smart wearable devices. Background Art

[0002] Heart rate and blood oxygen are the most important vital signs of the human body. They vary from person to person due to age, gender and other physiological conditions. The significance of measuring heart rate and blood oxygen is mainly reflected in three aspects. First, in terms of exercise, heart rate can reflect the real information of the user's body during exercise. Secondly, in terms of disease, by monitoring whether the resting heart rate is within the normal range, monitoring cardiac arrest and abnormal increase in heart rate during daily activities, it can play a role in timely prevention of diseases. Even by monitoring the heart rate through electrocardiogram, it can detect whether the heart rhythm is abnormal. Finally, in terms of mental aspects, the monitored heart rate variability can be used to analyze the evaluation of autonomic nervous function, such as mental stress, tension and relaxation, and sleep quality.

[0003] At present, heart rate detection and blood oxygen detection are mainly carried out through smart wearable devices, such as smart watches with heart rate monitoring and blood oxygen monitoring. Existing smart watches on the market monitor human blood oxygen and heart rate by configuring LED lights, PD receivers, Fresnel lenses, etc. However, the light emitted by the LED lamp passes through the Fresnel lens and only forms a detection light of a single focal length. When more detection objects need to be monitored, it is necessary to increase the combination of LED lights emitting light of different wavelengths and Fresnel lenses. This will increase the cost and is not conducive to the accuracy of detection. At the same time, the optical detection component Fresnel lens is thicker and more inconvenient to use. When the user wears the smart watch, there will be a bulge in the middle of the Fresnel lens, which will bring a sense of pressure and foreign body to the wearer's wrist, resulting in a poor experience. In addition, the bulge causes the smart wearable device to be unable to fit tightly, thereby reducing the measurement accuracy.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a membrane with an optical microstructure applied to smart wearable devices is provided, in order to achieve a purpose with greater practical value. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a diaphragm with an optical microstructure applied to a smart wearable device, so as to solve the problems in the prior art that when the smart wearable device is in use, the combination of LED lights and Fresnel lenses for heart rate monitoring and blood oxygen monitoring will only form detection light with a single focal length, which cannot detect different biological characteristics, and the Fresnel lens is thick and has protrusions, and cannot fit closely with the skin of the detection object, resulting in inaccurate measurement accuracy and inconvenient use.

[0006] The purpose and effect of the diaphragm with optical microstructure applied to smart wearable devices in the utility model are achieved by the following specific technical means:

[0007] A membrane with an optical microstructure used in smart wearable devices comprises a transparent layer, a light shielding layer, a PET film layer, a microlens film layer, and a circuit layer, which are arranged in sequence from top to bottom. A first receiving groove is provided at the bottom center of the PET film layer, and two second receiving grooves are respectively provided at the bottom of the PET film layer and are located at both ends of the first receiving groove. An LED lamp located in the first receiving groove is provided on the top surface of the circuit layer, and two PD receivers located in the second receiving grooves are respectively provided on the top surface of the circuit layer. A microlens film layer located directly above the LED lamp is attached to the top wall of the first receiving groove, and a microlens film layer located directly above the PD receiver is attached to the reverse side of the top wall of the second receiving groove, and a dot matrix microlens structure is provided on the microlens film layer.

[0008] Furthermore, the dot matrix microlens structure includes small lenses and large lenses. The large lenses are arranged in a circular array around the center of the microlens film layer and spread outward. In addition to the large lens array area, the microlens film layer also has a plurality of small lenses arranged in an array. The small lenses and the large lenses are arranged in an alternating array.

[0009] Furthermore, a light blocking member is provided between the first accommodating groove and the second accommodating groove.

[0010] Furthermore, the light-shielding layer includes a transparent area and a light-shielding area, the transparent area is located above the first accommodating groove and the second accommodating groove, and the light-shielding area is located at both ends of the light-shielding layer and directly above the light blocking member.

[0011] Furthermore, the diameter of the small lens is 0.05 μm

[0012] Furthermore, the diameter of the large lens is 0.12 μm.

[0013] Compared with the prior art, the utility model has the following beneficial effects.

[0014] By arranging a dot matrix microlens structure on the microlens film layer, the light signal emitted by the LED lamp can monitor different biological characteristics of the human body through the dot matrix microlens structure. The microlens film layer has a focusing effect on the light signal emitted by the LED lamp. The dot matrix microlens structure includes a large lens and a small lens. The large lens and the small lens focus the light emitted by the LED lamp respectively to form detection lights with different focal lengths. The detection lights with different focal lengths are focused on the hemoglobin and oxygenated hemoglobin in the blood vessels of the object to be measured to monitor different biological characteristics of the human body. At the same time, a reverse microlens film layer is arranged above the PD receiver, which can reflect and focus the detection light signal of the detected object to the PD receiver. The large lens and small lens on the microlens film layer can form reflected light into light signals with different focal lengths, which are fed back to the PD receiver to convert different light signals into electrical signals of different biological characteristics to form specific blood oxygen values ​​and heart rate values. The dot matrix microlens structure on the microlens film layer reduces monitoring errors, reduces light loss, and improves the accuracy of monitoring precision. The microlens film layer is used to replace the traditional Fresnel lens, and the transparent layer with a comfortable material fits the user's skin, avoiding the problem that the protrusions on the Fresnel lens cannot fit closely to the user, thereby improving the accuracy of monitoring precision, making the smart wearable device thinner and lighter, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional view of a membrane with an optical microstructure that is applied to a smart wearable device according to the present invention.

[0016] Figure 2 It is a stereoscopic diagram of the microlens film layer of the utility model.

[0017] Figure 3 It is a plan view of the microlens film layer of the utility model.

[0018] Figure 4 yes Figure 3 A-A section view.

[0019] Figure 5 It is a schematic diagram of the optical path of the microlens thin film layer of the utility model.

[0020] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0021] 1. Transparent layer; 2. Shading layer; 3. PET film layer; 4. Microlens film layer; 5. Circuit layer; 6. LED lamp; 7. PD receiver; 21. Transparent area; 22. Shading area; 31. First receiving groove; 32. Second receiving groove; 33. Light blocking member; 41. Small lens; 42. Large lens. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0023] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example:

[0026] As attached Figure 1 To Attachment Figure 5 As shown:

[0027] A membrane with an optical microstructure used in smart wearable devices comprises a transparent layer 1, a light shielding layer 2, a PET film layer 3, a microlens film layer 4, and a circuit layer 5 which are sequentially arranged from top to bottom. The transparent layer 1 is made of a comfortable material for fitting with human skin. The above combination replaces the combination of a traditional Fresnel lens and a film layer, thereby avoiding the problem that the protrusions on the Fresnel lens cannot fit closely with the user, improving the monitoring accuracy and the user's comfort. A first receiving groove 31 is provided at the center of the bottom of the PET film layer 3, and two second receiving grooves 32 are respectively provided at the bottom of the PET film layer 3 and located at both ends of the first receiving groove 31. An LED lamp 6 located in the first receiving groove 31 is provided on the top surface of the circuit layer 5, and two PD receivers 7 located in the second receiving groove 32 are respectively provided on the top surface of the circuit layer 5. The first receiving groove 31 and the second receiving groove 32 reduce the space occupied by the LED lamp 6 and the PD receiver 7, making the wearable device light and thin, easy to carry, and improving the user's use experience. A microlens film layer 4 located directly above the LED lamp 6 is attached to the top wall of the first accommodating groove 31. The microlens film layer 4 focuses the detection light emitted by the LED lamp 6 into the blood vessels of the human skin. A microlens film layer 4 located directly above the PD receiver 7 is attached to the top wall of the second accommodating groove 32 in the reverse direction. The reversely attached microlens film layer 4 can focus the reflected light signal formed by the detection light in the blood vessels of the human skin onto the PD receiver 7. The PD receiver 7 converts the light signal into an electrical signal, thereby obtaining the heart rate value and blood oxygen value in the monitoring data, thereby achieving the purpose of monitoring human health data. A dot matrix microlens structure is arranged on the microlens film layer 4. The light emitted by the LED lamp 6 can monitor different biological characteristics of the human body through the dot matrix microlens structure, and the reflected light formed by different biological characteristics can be collected on the PD receiver 7, so that the PD receiver 7 can quickly analyze the reflected light signals of different biological characteristics to form electrical signals, obtain different health data values ​​of the human body, and improve the accuracy of monitoring precision.

[0028] Among them, the dot matrix microlens structure includes a small lens 41 and a large lens 42. The large lens 42 is arranged in a circular array around the center of the microlens film layer 4 and diffuses outward. The large lens 42 can focus the detection light emitted by the LED lamp 6 into the blood vessels of the human skin to form a detection light with a longer focal length, which is reflected to the reversely arranged microlens film layer 4 to focus the reflected light again to form reflected light signals with different focal lengths, which are focused on the PD receiver 7. The PD receiver 7 collects different reflected light signals, analyzes them into electrical signals, extracts different biological characteristics, and obtains different monitoring health values. The array setting of multiple large lenses 42 avoids the inaccuracy of detection of a single detection light with a longer focal length. Multiple comparative detections obtain more accurate health monitoring data, thereby improving the accuracy of monitoring precision. In addition to the large lens 42 array area, the lens film layer 4 also has a plurality of small lenses 41 arrayed therein. The small lenses 41 and the large lenses 42 are arranged in an interlaced array. The small lenses 41 can focus the detection light emitted by the LED lamp 6 into the blood vessels of the human skin to form a detection light with a shorter focal length. The detection light with a shorter focal length is reflected to the reversely arranged microlens film layer 4 to focus the reflected light again to form reflected light signals with different focal lengths, which are focused on the PD receiver 7. The PD receiver 7 collects different reflected light signals, analyzes them into electrical signals, extracts different biological characteristics, and obtains different monitoring health values. The array arrangement of the plurality of small lenses 41 avoids the inaccuracy of detection of a single detection light with a shorter focal length. Multiple comparative detections obtain relatively accurate health monitoring data, thereby improving the accuracy of monitoring precision.

[0029] Specifically, the small lenses 41 and the large lenses 42 arranged in an array in an interlaced manner respectively focus the light emitted by the LED lamp 6 to form detection lights of different focal lengths. The detection lights of different focal lengths are focused on the hemoglobin and oxygenated hemoglobin in the blood vessels of the object to be measured to monitor different biological characteristics of the human body. At the same time, a reverse microlens film layer 4 is arranged above the PD receiver 7, which can reflect and focus the detection light signal of the object to be detected to the PD receiver 7. The large lenses 42 and the small lenses 41 on the microlens film layer 4 can form the reflected light into light signals of different focal lengths, which are fed back to the PD receiver 7, and the different light signals are quickly converted into electrical signals of different biological characteristics to form specific blood oxygen values ​​and heart rate values. The dot matrix microlens structure on the microlens film layer 4 reduces the monitoring error, reduces the light loss, and improves the accuracy of the monitoring precision.

[0030] Among them, a light blocking member 33 is also arranged between the first accommodating groove 31 and the second accommodating groove 32. The light blocking member 33 is used to separate the detection light emitted by the LED lamp 6 and the reflected light generated by the detection light of the LED lamp 6 in the human blood vessels, so as to avoid the loss of light caused by the mixing of the two lights and improve the accuracy of monitoring precision.

[0031] Among them, the shading layer 2 includes a transparent area 21 and a shading area 22. The transparent area 21 is located above the first accommodating groove 31 and the second accommodating groove 32. The shading area 22 is located at both ends of the shading layer 2 and directly above the light blocking member 33. The transparent area 21 on the shading layer 2 is used for the transmission of the detection light emitted by the LED lamp 6 and the reflected light of the PD receiver 7. The shading area 22 avoids the mixing of the detection light of the LED lamp 6 and the reflected light received by the PD receiver 7, which facilitates the detection light emitted by the LED lamp 6 to better irradiate the blood vessels of the human skin, and at the same time facilitates the PD receiver 7 to better collect the optical signal of the reflected light to form an accurate electrical signal, thereby obtaining accurate heart rate values ​​and blood oxygen values, reducing the loss of light during the monitoring process, and improving the accuracy of the monitoring accuracy.

[0032] The diameter of the small lens 41 is 0.05 μm.

[0033] The diameter of the large lens 42 is 0.12 μm.

[0034] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A membrane having an optical microstructure and applied to a smart wearable device, characterized in that: The invention comprises a transparent layer (1), a light shielding layer (2), a PET film layer (3), a microlens film layer (4), and a circuit layer (5) which are arranged in sequence from top to bottom. A first receiving groove (31) is provided at the center of the bottom of the PET film layer (3). Two second receiving grooves (32) are respectively provided at the bottom of the PET film layer (3) and are located at both ends of the first receiving groove (31). An LED lamp (6) located in the first receiving groove (31) is arranged on the top surface of the circuit layer (5). Two PD receivers (7) located in the second receiving grooves (32) are respectively arranged on the top surface of the circuit layer (5). A microlens film layer (4) located directly above the LED lamp (6) is attached to the top wall of the first receiving groove (31). A microlens film layer (4) located directly above the PD receiver (7) is attached to the top wall of the second receiving groove (32). A dot matrix microlens structure is provided on the microlens film layer (4).

2. The membrane with an optical microstructure used in a smart wearable device according to claim 1, characterized in that: The dot matrix microlens structure comprises small lenses (41) and large lenses (42); the large lenses (42) are arranged in a circular array around the center of the microlens film layer (4) and diffuse outward; the microlens film layer (4) is also arranged with a plurality of small lenses (41) in an array in addition to the large lens (42) array area; the small lenses (41) and the large lenses (42) are arranged in an alternating array.

3. The membrane with an optical microstructure used in a smart wearable device according to claim 1, characterized in that: A light blocking member (33) is also provided between the first accommodating groove (31) and the second accommodating groove (32).

4. The membrane with an optical microstructure used in a smart wearable device according to claim 3, characterized in that: The light-shielding layer (2) comprises a transparent area (21) and a light-shielding area (22); the transparent area (21) is located above the first receiving groove (31) and the second receiving groove (32); and the light-shielding area (22) is located at both ends of the light-shielding layer (2) and directly above the light-blocking member (33).

5. The membrane with an optical microstructure used in a smart wearable device according to claim 2, characterized in that: The diameter of the small lens (41) is 0.05 μm.

6. The membrane with an optical microstructure used in a smart wearable device according to claim 2, characterized in that: The diameter of the large lens (42) is 0.12 μm.

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