Abstract: The present invention relates to an improved TV converter system for changing digital TV signal to analog and/or having multipurpose capabilities that the host computer of the TV broadcast station remotely controls the TV converter system according to the address and transmits a national emergency disaster warning signal, a digital file of printing contents such as newspaper, commercial catalogues or books, and contents of VOD to the specific TV converters by its' address. It also provides the technology for high speed wireless internet service with the TV converter by its bidirectional data communications system which comprises the downward signal with a digital TV broadcasting signal through the TV converter and upward signal with data transmission system of subscriber's mobile phone network system.

Abstract: This invention provides a pedestrian signal system not only for normal pedestrians but also for the blind, the disabled person of weak sight, and the illiterate by displaying the remaining time of each signal change in image figures at the signal head and by generating a voice signal in real time. It reduces the cost of the system fabrication, installation and maintenance of the system by combining the five functions of the pedestrian signals such as a walk signal, a stop signal, a remaining time of each signal of red/green and/or the voice generator for blinds in one signal head. Also, this invention provides the useful double safety traffic signal system especially for a school zone by installing LED studs on the stop line at crossroad for warning drivers by blinking the LED studs automatically when the walk signal is in on-mode.

Abstract: This invention provides an e-learning system having a capability for authenticating the learner's ID via Internet with the learner's physical Bio-ID such as a fingerprint, an iris and/or a vein of the learner into the login process and additional periodic checking according to the instruction signal generated by the contents. Accordingly, once a learner successfully logs into his or her account, the computer will monitor each learner's progress on a lecture or an examination. Thus, the invention enable to operate a full online distance education from a single database for the worldwide learners, at each learner's own space and scheduling, anytime, anyplace, in any of the major languages selected by the learners and accurately account credit hours of each learner by the lectures and examination on demand for conferring a degree or to transfer the credit to the university where they will earn their degrees.

Abstract: This invention relates to provide a pedestrian signal system not only for the normal pedestrian but also for the blinds, the disabled person of weak sight, and the illiterates by displaying the remaining time of each signal change in image figures at the signal head and by generating voice signal in real time. It reduces the cost of the system fabrication, installation and maintenance of the system by combining the five functions of the pedestrian signals such as a walk signal, a stop signal, a remaining time of each signal of red/green and/or the voice generator for blinds in a one signal head. Also, this invention provides the useful double safety traffic signal system especially for a school zone by installing LED studs on the stop line at crossroad for warning to drivers by blinking the LED studs automatically when the walk signal is on-mode.