Seiko Epson Corporation

Ayae Sawado

Akira Ikeda

Kohei Yamada

Megumi Enari

Akiko Yamada

Akira Kitahara

Masayasu Fukuoka

Yuta Machida

Toshiyuki Kasai

Hitoshi Tsuchiya

Tsukasa Eguchi

Yutaka Tsuchiya

Akihide Haruyama

Masakazu Nishida

Sakiko Shimizu

Hiroyuki Masuda

A biological information measurement apparatus includes: a light emitting unit configured to emit laser light to a living body; a light transmission member configured to reflect a part of the laser light and separate the laser light into a first light beam and a second light beam; a first light receiving unit configured to detect the first light beam; and a second light receiving unit configured to detect scattered light. The light transmission member has a first surface where the laser light enters and a second surface where the laser light entering the first surface enters, and D<D, in which a parallel axis parallel to an intersection line between the first surface and an entering surface on which the light emitting unit and the first light receiving unit are disposed is defined as a first axis, an orthogonal axis orthogonal to the first axis on the first surface is defined as a second axis, Dis a first diameter of the laser light along the first axis, and Dis a second diameter of the laser light along the second axis.

Biological information measurement apparatus and biological information measurement system

A biological information acquisition device includes a light source configured to emit a laser beam; a light branching element configured to branch the laser beam into a first luminous flux and a second luminous flux; a first light receiving element configured to receive the first luminous flux; a second light receiving element configured to receive scattered light generated by scattering of the second luminous flux incident on an inspection site of a living body; a differential circuit to which the first light receiving element and the second light receiving element are coupled; a signal processing unit configured to obtain biological fluid information by processing a light detection signal output via the differential circuit; and a first light shielding part configured to reduce the scattered light incident on the first light receiving element.

Biological information acquisition device

A biological analysis device includes an average blood pressure calculation unit that calculates an average blood pressure index related to an average blood pressure of a biological body in accordance with a blood vessel diameter index related to a blood vessel diameter of the biological body and a blood flow index related to a blood flow of the biological body and calculated from an intensity spectrum related to a frequency of light reflected and received from an inside of the biological body through radiation of a laser beam.

Biological analysis device, biological analysis method, and program

A biological analysis device includes: a pulse pressure calculation unit that calculates a pulse pressure index related to a pulse pressure of a biological body; an average blood pressure calculation unit that calculates an average blood pressure index related to an average blood pressure of the biological body; and a blood pressure calculation unit that calculates a systolic blood pressure and a diastolic blood pressure in accordance with the pulse pressure index and the average blood pressure index. At least one of the pulse pressure index and the average blood pressure index is calculated in accordance with a blood flow index which is calculated from an intensity spectrum related to a frequency of light reflected and received from an inside of the biological body through radiation of a laser beam and is related to a blood flow of the biological body.

Pulse pressure and blood pressure analysis device, pulse pressure and blood pressure analysis method, and program

A blood pressure measurement device including a measurement wave detection unit that detects a measurement wave that passed through a measurement region of a subject and generates a detection signal, a blood pressure analysis unit that repeatedly identifies a blood pressure of the subject by analyzing the detection signal, a state determination unit that determines whether or not the subject is in a sleep state, a change determination unit that determines whether or not a time change rate of the blood pressure exceeds a threshold value, and a measurement control unit that shortens a time interval where the blood pressure analysis unit identifies the blood pressure in a case where the state determination unit determines that the subject is in the sleep state and the change determination unit determines that the time change rate exceeds the threshold value.

Blood pressure measurement device and blood pressure measurement method

A biological analysis device includes a blood vessel calculation unit that calculates a blood vessel index related to a blood vessel of a biological body in accordance with a blood mass integration value obtained by integrating blood mass indexes relate to a blood mass of the biological body during an integration period and a blood flow integration value obtained by integrating blood flow indexes related to a blood flow of the biological body during the integration period.

A data processing apparatus includes an arithmetic processing unit that executes a data aggregation step of aggregating N types (N&#x2265;3) of sampling time series data to acquire M types (M&#x2265;2 and N&#x3e;M) of classification time series data, a classification step of classifying the M types of classification time series data into a plurality of clusters, and an appearance data generation step of generating time series appearance data for each cluster.

Data processing apparatus and data processing method

A biological clock time calculating apparatus includes: a measuring portion which measures bio-information that changes on a daily basis; and an arithmetic processing portion which calculates biological clock time based on a measurement result of the measuring portion. A biological clock time calculating method may be configured to include: measuring bio-information which changes on a daily basis; and calculating biological clock time based on the measurement result.

Biological clock time calculating apparatus and biological clock time calculating method

An electro-optical device of the invention includes a first substrate and a second substrate facing each other with an electro-optical medium sandwiched therebetween, a pixel region having a plurality of pixels, and an ion trap section having an electrode formed in a region outside of the pixel region. A trapping voltage applied to the electrode of the ion trap section varies in accordance with a calculated voltage value that is calculated from a driving voltage applied to the electro-optical medium in one or a plurality of the pixels serving as a reference. The trapping voltage is set relatively high when the calculated voltage value belongs to a relatively high voltage range, and the trapping voltage is set relatively low when the calculated voltage value belongs to a relatively low voltage range.

Electro-optical device, method of driving electro-optical device, electronic apparatus, and projector

When axes are projected to a reference surface perpendicular in the thickness direction of a liquid crystal layer, a rotational angle &#x3c6;of an alignment axis of a liquid crystal layer from a reference direction on the reference surface, a rotational angle &#x3c6;of a transmission axis of an incident-side polarizing plate from the reference direction, a rotational angle &#x3c6;of a transmission axis of a wire grid element from the reference direction, and a rotational angle &#x3c6;of a transmission axis of an exit-side polarizing plate from the reference direction satisfy all the equations below:44&#xb0;&#x2266;&#x3c6;-&#x3c6;&#x3c;45&#xb0; or 45&#xb0;&#x3c;&#x3c6;-&#x3c6;&#x2266;45&#xb0;1&#x2266;&#x3c6;2, where1=0.191&#xd7;&#x3c6;+0.986&#xd7;&#x3c6;&#x2212;14.435 and2=0.191&#xd7;&#x3c6;+0.986&#xd7;&#x3c6;+14.435, and1&#x2266;&#x3c6;&#x2212;90&#xb0;&#x2266;2, where1=0.064&#xd7;&#x3c6;+0.841&#xd7;&#x3c6;+1.525&#xd7;&#x3c6;2=0.064&#xd7;&#x3c6;&#x2212;0.841&#xd7;&#x3c6;+1.525&#xd7;&#x3c6;+1.46.

Projector

A liquid crystal device includes a first substrate, a second substrate disposed to face the first substrate, a plurality of pixel electrodes arranged between the first substrate and the second substrate at intervals with each other, and a liquid crystal layer. The liquid crystal layer is interposed between the first substrate and the second substrate, and configured to include a vertical alignment liquid crystal. When the interval between the pixel electrodes adjacent to each other is s [&#x3bc;m], the thickness of the liquid crystal layer is d [&#x3bc;m] and the pretilt angle of the vertical alignment liquid crystal is &#x3b8;[&#xb0;], a relation equation &#x2212;1.6&#xd7;s/d+4.4&#x2266;&#x3b8;&#x2266;&#x2212;2.6&#xd7;s/d+5.6 is satisfied.

Liquid crystal device and electronic apparatus

An electrooptic device includes a first substrate, a second substrate which is arranged so as to be opposed to the first substrate, a plurality of pixel electrodes which are provided between the first substrate and the second substrate, a dielectric multilayer film which is formed so as to cover the plurality of pixel electrodes and in which a plurality of dielectric layers are laminated, and a sealing member which is arranged around a pixel region on which the plurality of pixel electrodes are provided and bonds the first substrate and the second substrate to each other. In the electrooptic device, at least one dielectric layer of the plurality of dielectric layers is formed so as not to overlap with a sealing region on the first substrate, on which the sealing member is arranged.

Electrooptic device and electronic apparatus

A liquid crystal device includes a first substrate; a second substrate facing the first substrate; and a liquid crystal layer sandwiched between the first substrate and the second substrate. A display operation is performed by changing an alignment state of the liquid crystal layer from a splay alignment to a bend alignment. The first substrate includes a plurality of scanning lines, a plurality of data lines intersecting the plurality of scanning lines, a plurality of pixel electrodes, and a plurality of transition electrodes generating a potential difference with respect to the pixel electrodes, the plurality of transition electrodes being formed closer to the liquid crystal layer than the scanning lines or the data lines and closer to the first substrate than the pixel electrodes.

Liquid crystal display device comprising transition electrodes having a same potential as a corresponding one of the scanning lines

A liquid crystal device includes two substrates sandwiching a liquid crystal layer and has a reflective display area and a transmissive display area. A liquid crystal layer thickness adjusting layer makes a thickness of the liquid crystal layer in the reflective display area smaller than in the transmissive display area. The device performs display by transitioning an alignment of the liquid crystal layer from splay alignment to bend alignment. The liquid crystal layer thickness adjusting layer has a slope inclining from the reflective display area side to the transmissive display side. A pixel electrode electrically connected to a switching element, which is electrically connected to a signal line, are provided on one of the substrates. A slit is formed in the pixel electrode at an area overlapping with the slope in plan view and part of the signal line is projected along at least part of the slit.

Transflective liquid crystal device and electronic apparatus having a liquid crystal layer of varying thickness

An optically compensated birefringence mode liquid crystal device includes a plurality of gate lines and source lines interesting each other in a plan view, and a plurality of switching elements formed in a one-to-one correspondence with the intersections of the gate lines and the source lines. The device also includes a plurality of pixel electrodes electrically connected to the switching elements, respectively. Each pixel electrode overlaps a part of an adjacent gate line and/or a part of an adjacent source line in the plan view.

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Kai, Japan

Ayae Sawado