Optical biomedical sensor module and manufacturing method thereof

Abstract

An optical biomedical sensor module includes a circuit board, a light receiving unit stacked on the circuit board, and a light emitting unit stacked on the light receiving unit. There is a corresponding light blocking structure between the light-emitting unit and the light-receiving unit, so as to prevent the light emitted by the light-emitting unit from directly hitting the light-receiving unit. The relationship between the light-emitting unit and the light-receiving unit is stacked up and down, which can not only achieve the effect of reducing the size of the components to make the volume of the wearable device smaller, but also make the light-emitting unit closer to a user, so that The optical path of an incident light radiated from the light-emitting element to the user's skin is shortened, thereby reducing light loss and achieving power saving effect. The present invention also provides a manufacturing method of the aforementioned optical biomedical sensor module.

Description

technical field [0001] The invention relates to a sensor module, in particular to an optical biomedical sensor module and a manufacturing method thereof. Background technique [0002] With the concept of modern people focusing on health management and the rise of wearable devices, sensors that measure human heart rate or blood oxygen and other related health information by detecting photoplethysmography (PPG) have been gradually applied to many wearable devices middle. [0003] refer to figure 1 , an existing optical biomedical sensor module 1, which includes a printed circuit board (PCB) 11, a light receiving element 12 and a light emitting element 13 arranged on the same level of the printed circuit board 11 On the installation surface 111 , there is a light blocking wall 14 surrounding the light receiving element 12 and the light emitting element 13 . In the optical biomedical sensor module 1 , the light receiving element 12 is a sensor using the aforementioned photopl...

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Problems solved by technology

[0004] However, as digital electronic products such as wearable devices continue to become thinner and smaller, the existing optical biomedical sensor module 1 has both the light-receiving element 12 and the light-emitting element 13 arranged on the printed circuit board 11 On the installation surface 111 of the same level, it is difficult to further miniaturize the structure of the existing optical biomedical sensor module 1 when it is applied to a wearable device

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