Nokia Mobile Phones Limited

Jouko Haavisto

Mika Isotalo

Arto Peuhu

Marko Erkkil&auml;

Kaj Saarinen

Juha T Rinne

Steven Barrett

A modular system for personal data acquisition and communication, is expanded advantageously a cellular telephone system the functions of which can be increased by means of various expansion cards. A host device in the system according to the invention, such as a mobile communication device, need not be equipped with all possible functions in the manufacturing stage but some of the functions can be realized on expansion cards, and the user can add a desired function to the host device according to need. The expansion cards are small and they are installed substantially inside the host device, such as a mobile communication device, so that the entity formed by the host device and the expansion card seems to the user as a single compact device. Advantageously, the expansion cards include, in addition to the hardware needed, also the software required for controlling the operation of the modules.

Modular mobile communication system

It is possible to create a two channel data transfer system using an infrared link according to the invention. It is possible by utilizing it to transfer data between two terminal devices ( ) simultaneously to both directions (full duplex), or to establish a two-channel data transfer connection between two terminal devices ( ). An infrared link according to the invention is realized using linearly polarized infrared light (LV, LH). In it a data transfer channel formed using an infrared connection is divided into two separate channels using e.g. polarizers (V , V , H , H ) or beam splitters (BS , BS ). In this case, when data is transferred between two terminal devices ( ), the data transfer to one direction is realized e.g. using vertically polarized infrared light (LV), and correspondingly to the other direction using horizontally polarized infrared light (LH).

Infrared link

A mobile communications device is constructed to receive an expansion card which provides to the mobile communications device the capability of generating images. The expansion card contains the basic devices, utilities, and control for the imaging function.

A radiotelephone proximity detector including a first proximity unit having a receiver and a second proximity unit having a transmitter, wherein the units can be coupled together and the coupling can be detected. One of the units is associated with a radiotelephone and the other with a user. When the units are coupled, they are responsive to the detection of their uncoupling, whereupon the transmitter of the second proximity unit transmits a proximity signal to the receiver of the first unit. The first proximity unit estimates the proximity of the radiotelephone and the user on the basis of the received proximity signal. Thus the two units operate together such that, when coupled, at least one of the units enters a standby mode, and when uncoupled, at least one of the units sends a proximity signal to the other unit.

Growing community of inventors

Nokia, Finland

Jouko Haavisto