These days, people who already have or having the risk of diseases for example cancer, cardiac disease and cerebrovascular are increasing. As we know, these diseases are caused by lifestyle disease. There is increasing interest in home health check and care.

We propose a novel concept named ambient vital sensing. This concept is based on the involuntary measuring of vital signs of a user relaxing in a living environment and vital signs' trend analysis is also done with the help of past data automatically stored after each session. In addition, by providing feedback to the user, motivation for personal health management is assisted.

We are investigating a novel type of interface that enables the long-term vital sensing through noninvasive direct-contact vital sign detection and observation of the body motion and feedback of health condition by illuminations. Although various types of vital sign measuring equipment are commercially available in these days, complexity and the inconvenience of the user interface coupled with the human reluctance to stick with something for a long time discourages the daily usage of those. Consequently this research proposes a method of involuntary measuring of vital signs of a user relaxing in a living environment. This study also investigates the physical and physiological activity regarding body motion. In addition trend analysis is also done with the help of past data automatically stored after each session.

There are much noise cause of body movement in daily life and one of the least body movement situation is to sit on a chair. This chair-type interface is installed with physiological sensors, which are noninvasive direct-connect, physical sensors, and the user only have to sit on it get measurements. Then this interface automatically measures vital sign and the body motion simultaneously without needing to attach personal health care measuring devices. In addition, this chair provides a feedback of health condition by using an illuminating interface.