Kunimasa Katayama

Development of an Electrostatic Generator for a Cardiac Pacemaker that Harnesses the Ventricular Wall Motion.

Abstract A variable-capacitance-type electrostatic (VCES) generator that harnesses ventricular motion was developed with the aim of driving a cardiac pacemaker permanently without a battery. The developed model of the VCES generator was handmade, but it was too large to implant into the thoracic cavity of a laboratory animal. For this reason, to demonstrate its feasibility, a somewhat complicated method that measured the left ventricular wall motion by means of the accelerometer module put on the free wall and reproduced the motion in real time with a vibration mode simulator was used. The VCES generator was vibrated on the simulator, and its generated power was supplied to the cardiac pacemaker, which then stimulated the heart. A mean power of approximately 36 μW was generated, which was enough to drive the cardiac pacemaker. Continuous electric generation and cardiac pacing were performed successfully for more than 2 h in the animal experiment.

Simplification of infrared illumination of stereoscopic liquid crystal TV

Stereoscopic, multi-parallax, electro-holographic and multi-planar methods are no glasses methods as real-time 3D imaging devices. These methods except stereoscopic need several parallax images or several plane images for their 3D image component. It is known there are many problems for taking and transmission of their 3D images. As for stereoscopic method using lenticular sheet limits the position of the viewers and/or is impossible to observation of the 3D image by several persons simultaneously. Conventional our method Stereoscopic Liquid Crystal TV does not have such above drawbacks but has difficulty to enlarge the size of the 3D image output screen and still remains improvement of the infrared illuminating system for the observers and the image taking system of the TV because of its characteristics of the system components. Two infrared TV cameras and two infrared lumps are necessary for the conventional method. But in this time we produced new methods necessary an infrared TV camera and an infrared lump.

Stereoscopic liquid crystal display II (practical application)

Three-dimensional displays that permit simultaneous observation by plural persons have been reported in other papers, but a 3-D endoscope is only available for stereo image and is better used in the no-glasses method. Hence conventional 3-D techniques were poor for the endoscope for medicine. We produced a new 3-D device (stereoscopic liquid crystal display) which permits simultaneous observation of a stereo pair by plural persons without glasses and we improve the device for the endoscope. We combined the 3-D endoscope and the new 3-D device. The endoscope has two CCD cameras. The cameras create a stereo pair transmitted by two NTSC signals. The system is time-parallel stereoscopic.