Abstract: An image conversion unit (200) for converting a first input image with a first resolution into an output image with a second resolution, comprises a coefficient-calculating means (106) for calculating a first filter coefficient on basis of pixel values of the first input image and of pixel values of a second input image.

Abstract: The invention relates to a projection device for projecting an image, comprising an illumination means (1) having an entrance (13) for entering light from a light source, a polarization-selective mirror (3) for transmitting a first polarization component (42) of the light to a display panel (4) and reflecting a second component (43) back to the illumination means (1), and a display panel (4) for selecting colour components of the first polarization component for projection at a projection means (7). The display panel comprises a dichroic filter means (5) for filtering colour components of the first polarization component (42) and a controllable reflective means (6) for changing the state of polarization of the filtered colour components depending on a control signal and for reflecting the filtered colour components back to the polarization-selective mirror (3).

Abstract: An IDDQ test is applied to an electronic circuit (16). A power supply unit supplies power supply current to the electronic circuit. The output impedance of the power supply unit is adjusted to a value selected for the electronic circuit, the value having been selected so that a resonance circuit (14) that comprises a connection between the power supply unit and the electronic circuit is substantially critically dampened. The current sense element (18) that is used to measure IDDQ current is coupled between an external power supply and a supply input of the power supply unit, so that the current sense element does not affect the output impedance.