Nokia Mobile Phones Limited

Mikko Veijo Halttunen

Jorma Matero

Pekka S Lonka

Heikki Mattila

Kjell I Ostman

Pertti J Korhonen

Jaakko Samuli Vanttila

Petteri Vanhanen

Markku Gunnar Kankaanpaa

Paul Sofield

Tapio Rautava

Erkki Tiittanen

Display apparatus, particularly for hand-held equipment, comprising a display means adjustable to vary the transmission of light therethrough and a light source for transmitting light through the display means. A translucent or opaque screen may be provided for receiving light transmitted through the display means. The light transmitted through the display means may be projected to a surface remote from the display apparatus.

Hand-held transmissive LCD having a separation between touch screen and

In the present invention the cover-like part (21) of an RF shield is manufactured from a transparent material, e.g., plastic, and unplated areas that function as light conductors (22) are left in the conductive plating covering the shield. The present invention combines an RF shield and a light conductor into one structure whose manufacturing process is quite easy to control. The present invention eliminates the necessity of having separate plates that function as light conductors.

Lattice RF shield

A telephone holder according to the present invention includes a carrier (101) and a body (102), which are able to move vertically in relation to each other between two extreme positions. In the first extreme position an electrical connector of the telephone (111) is galvanically connected to a counterpart (109) of the connector in the holder. In the second extreme position the connector is disconnected from the counterpart. The carrier is joined to the body by means of slide surfaces (103, 104), which permit the carrier to move back and forth vertically in relation to the body between said extreme positions. The movement and its extent are governed by springs (106), for example. The holder according to the present invention can be accurately formed according to the contours of the telephone (111), preventing the telephone from moving laterally while in the holder, facilitating alignment of the connector with the counterpart (109).

Telephone holder

A method of providing a cover on a substrate to shield against radio frequency radiation, wherein an electrically conductive material--such as a conductive, possibly adhesive, paste--which shields against RF radiation is applied in a fluid state to the desired area of the substrate. The substrate may be a printed circuit board (1) or a base member of an RF housing.

Method for forming an RF shielded enclosure

An assembly and method of assembly for shielding a radio telephone. First and second shields are disposed either side of a circuit board and urged together thereby sandwiching the circuit board. The first shield is relatively rigid compared to the second shield and can cause any deformities in the second shield to be compensated for by the second shield being urged against a rigid first shield, the shields may be removably coupled together which permits simple and quick disassembly if changes or repairs need to be made to the radio telephone.

Radio telephone with compliant shield and method

Structure and technique, for calibrating a vector modulator that does not require a network analyzer, are disclosed which are incorporated in a vector modulation system comprising a standard vector modulator circuit including means for shifting phase to adjust the relative phases of the I and Q components of the modulated RF carrier. Means for attenuating are included in the I and Q modulation system to adjust the relative amplitude of the modulation signals. The disclosure describes a technique wherein the microwave transmitter's I and Q phase difference is measured by measuring the power levels of the I and the Q signals. The power levels are compared and a correction value is stored in a read-only memory to compensate for the error. More particularly, the error compensation is achieved by first determining amplitude error or unbalance by I and Q signal power measurement and an amplitude compensation signal is stored, then a power measurement is carried out for phase compensation and a phase compensation signal is stored.

Tuning techniques for I/Q channel signals in microwave digital

An earthed intermediate frame (2) fitted between circuit boards (1) is provided with through apertures (8) for connectors (4) connecting the circuit boards (1), and grooves (6) are provided in register with the signal runs (5) on the surface of the circuit board (1), located on the surface of the intermediate frame (2) placed against the surface of the circuit board. The intermediate frame made of a metal or the surfaces of the apertures (8) surrounding the connectors (4) connecting the circuit boards (1) and of the grooves (6) covering the signal runs (5) of the circuit board (1) have been coated with an earthed metal folio (7).

Growing community of inventors

Oulu, Finland

Mikko Veijo Halttunen