Biological information measurement apparatus
First Claim
1. A biological information measurement apparatus comprising:
- a light emitter configured to emit light to irradiate a measurement area; and
light receiver configured to receive light transmitted through or reflected by the measurement area and to photoelectrically convert the light to a photoplethysmographic signal comprising biological information, a substrate in which the light emitter and the light receiver are disposed; and
a guide structurally configured to direct a position of the measurement area relative to the substrate,wherein, in a plan view, the light emitter and the light receiver are disposed in a plane perpendicular to at least one of a direction of the emitted light and a direction of the received light, andwherein the light emitter and the light receiver are positioned such that a line intersecting centers of each the light emitter and the light receiver is diagonal relative to a lengthwise direction of the measurement area, andwherein the substrate comprises a rectangular shape with the light emitter and the light receiver being disposed at diagonally opposing corner areas of the rectangular substrate, and one pair of sides of the substrate is parallel to a center axis of the guide.
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Accused Products
Abstract
A biological information measurement apparatus capable of improving the SN ratio of a photoplethysmographic signal by reducing stray light in detection light that reaches a light-receiving unit from a light-emitting unit is provided. A biological information measurement apparatus includes a light-emitting unit that irradiates a finger, a light-receiving unit that receives and photoelectrically converts light transmitted through or reflected by the finger and outputs a photoplethysmographic signal, and a processing unit that obtains biological information on the basis of the photoplethysmographic signal. The light-emitting and light-receiving units are disposed, in plan view in a plane perpendicular to the direction of the emitted light or the received light, such that a line passing through the centers of the light-emitting unit and the light-receiving unit is slanted relative to a lengthwise direction of the finger.
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Citations
18 Claims
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1. A biological information measurement apparatus comprising:
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a light emitter configured to emit light to irradiate a measurement area; and light receiver configured to receive light transmitted through or reflected by the measurement area and to photoelectrically convert the light to a photoplethysmographic signal comprising biological information, a substrate in which the light emitter and the light receiver are disposed; and a guide structurally configured to direct a position of the measurement area relative to the substrate, wherein, in a plan view, the light emitter and the light receiver are disposed in a plane perpendicular to at least one of a direction of the emitted light and a direction of the received light, and wherein the light emitter and the light receiver are positioned such that a line intersecting centers of each the light emitter and the light receiver is diagonal relative to a lengthwise direction of the measurement area, and wherein the substrate comprises a rectangular shape with the light emitter and the light receiver being disposed at diagonally opposing corner areas of the rectangular substrate, and one pair of sides of the substrate is parallel to a center axis of the guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A biological information measurement apparatus comprising:
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a main body including a guide configured to position a finger of a person in a lengthwise direction of the main body; a planar substrate disposed in a base of the main body; a light emitter disposed in the planar substrate and configured to emit light to irradiate the finger; and a light receiver disposed in the planar substrate and configured to receive light transmitted through or reflected by the finger and to photoelectrically convert the received light to a photoplethysmographic signal comprising biological information of the person, wherein the light emitter and the light receiver are positioned such that a line intersecting centers of each the light emitter and the light receiver is diagonal relative to the lengthwise direction of main body, and wherein the planar substrate comprises a rectangular shape with the light emitter and the light receiver being are disposed at diagonally opposing corner areas of the rectangular planar substrate, and one pair of sides of the planar substrate is parallel to a center axis of the guide of the substrate is parallel to a center axis of the cylindrical hollow cavity. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification