Abstract: The present invention relates to a device (100), systems (500, 500?, 500?) and a method for providing imaging of one or more aspects of blood perfusion induced by cardiac induced blood motion in a skin region (12) of a subject. Current perfusion imaging systems use either photoplethysmography (PPG) or speckle contrast (SC), but a problem of both techniques is that considerable ambiguity exists because the source of the signal (volume pulsatility in PPG or blood flow in SC) is unknown. The present invention is based on the idea of combining two different types of measurement, namely widefield imaging and radial imaging, in order to estimate the source depth (20) of the signal to provide more accurate PPG imaging and SC imaging.

Abstract: An autostereoscopic display includes a steerable display backlight, having a light output arrangement for providing lines of light output and a first lenticular lens array, with each lens focused near a corresponding line of light output. A display panel is illuminated by the backlight and a second lenticular array generates at least two views to different viewing directions. Head and/or eye tracking is used for tracking at least two viewers. Views are provided to the two eyes of a tracked viewer at the same time, and views are provided to the two eyes of different tracked viewers time-sequentially.

Abstract: An autostereoscopic display includes a steerable display backlight, having a light output arrangement for providing lines of light output and a first lenticular lens array, with each lens focused near a corresponding line of light output. A display panel is illuminated by the backlight and a second lenticular array generates at least two views to different viewing directions. Head and/or eye tracking is used for tracking at least two viewers. Views are provided to the two eyes of a tracked viewer at the same time, and views are provided to the two eyes of different tracked viewers time-sequentially.

Abstract: An autostereoscopic display comprises a steerable display backlight, comprising a light output arrangement for providing lines of light output and a first lenticular lens array, with each lens focused near a corresponding line of light output. A display panel is illuminated by the backlight and a second lenticular array generates at least two views to different viewing directions. Head and/or eye tracking is used for tracking at least two viewers. Views are provided to the two eyes of a tracked viewer at the same time, and views are provided to the two eyes of different tracked viewers time-sequentially.

Abstract: An autostereoscopic display comprises a steerable display backlight, comprising a light output arrangement for providing lines of light output and a first lenticular lens array, with each lens focused near a corresponding line of light output. A display panel is illuminated by the backlight and a second lenticular array generates at least two views to different viewing directions. Head and/or eye tracking is used for tracking at least two viewers. Views are provided to the two eyes of a tracked viewer at the same time, and views are provided to the two eyes of different tracked viewers time-sequentially.

Abstract: An autostereoscopic display device comprises a display (103) having an array of display pixels (105) and a view forming arrangement (109) of elongate elements which have a long axis which is slanted at an angle ? to the column pixel direction, and the elements have a pitch of P times the width between pixels of the same color in different columns. The pitch P is selected to be: P=0.5·k·(1+S2) in which S=tan ?, and k is a positive integer. This arrangement enables the resulting image projected in respect of each view to have a uniform and regular distribution of pixels across the image. This improves the visual appearance of the views.

Abstract: A device converts three dimensional [3D] image data arranged for a source spatial viewing configuration to a 3D display signal (56) for a 3D display in a target spatial viewing configuration. 3D display metadata has target width data indicative of a target width W t of the 3D display in the target spatial viewing configuration. A processor (52,18) changes the mutual horizontal position of images L and R by an offset O to compensate differences between the source spatial viewing configuration and the target spatial viewing configuration. The processor (52) retrieves source offset data provided for the 3D image data for calculating the offset O, and determines the offset O in dependence of the source offset data. Advantageously the 3D perception for the viewer is automatically adapted based on the source offset data as retrieved to be substantially equal irrespective of the screen size.

Abstract: An autostereoscopic display device comprises a display (103) having an array of display pixels (105) and a view forming arrangement (109) of elongate elements which have a long axis which is slanted at an angle ? to the column pixel direction, and the elements have a pitch of P times the width between pixels of the same colour in different columns. The pitch P is selected to be: P=0.5·k·(1+S2) in which S=tan ?, and k is a positive integer. This arrangement enables the resulting image projected in respect of each view to have a uniform and regular distribution of pixels across the image. This improves the visual appearance of the views.

Abstract: A lens structure for a display device comprises a lenticular arrangement, the lenticular arrangement comprising an array of parallel lenticular elements and comprising a birefringent layer. The extraordinary axis of the birefringent layer is arranged to be substantially at an angle between 30° and 90° with the elongate axis of the lenticular elements.

Abstract: The present invention relates to a method, load (12) and display device (10) where an output parameter value (V) of a power supply (14) coupled to a separate load (12) is regulated. The load (12) demands at least one such parameter value (V) from the power supply (14). The power supply (14) delivers the output parameter value (V) to the load (12). The load (12) comprises a control signal setting unit (16), which receives information relating to the output parameter value (V) and is connected to the power supply (14) for delivering a control signal (VC). The control signal (VC) includes information relating to the output parameter value (V) and is used by the power supply (14) for regulating the output parameter value (V). This makes the control signal setting unit (16) part of a feedback loop. The parameter value is preferably an output voltage, the load a plasma display panel and the display device a television set.

Abstract: The invention relates to an Electromagnetic Interference (EMI) filter circuit (Fa) for suppressing a Line Conducted Interference (LCI) signal. The EMI filter circuit (Fa) comprises a filter inductance (Lo) to carry a supply current (Isup) between a supply voltage (Vsup) and a load (L). The EMI filter circuit (Fa) further comprises an active circuit (Ca), arranged in parallel with the filter inductance (Lo). The active circuit (Ca) comprises a sensing circuit (Mm) to sense the LCI signal and further comprises a suppressing circuit (Ms) to suppress the LCI signal. In an embodiment of the active EMI filter circuit (Fa), the active circuit (Ca) comprises a negative inductance generating circuit to create a negative inductance value. Selecting the negative inductance generating circuit to create an inductance value (Lca) larger than the inductance value of the filter inductance (Lo) creates a resulting inductance (Lr) which is higher compared to the inductance value of the filter inductance (Lo).

Abstract: This invention relates to driving a liquid crystal display with a polarity inversion. The liquid crystal display panel (98) comprises a matrix of pixels (52, 62, 72), which is driven with a sequence of image frames. The method comprises driving the pixels during a first frame (n?1) with a first polarity pattern; driving the pixels with exception of a first set of pixels (54, 66, 74) during a second frame (n) with an inverted polarity pattern; and driving the first set of pixels (54, 66, 74) with the inverted polarity pattern during a third frame (n+1).

Abstract: An autostereoscopic display apparatus (104, 200, 301, 401, 501) is disclosed, comprising lenticular means (203, 305, 402, 502) configured to direct and control light emitted from a source (201, 302). The lenticular means comprises an array of lenticular elements (204, 306, 403, 503), said array of lenticular elements comprising a first surface facing light incident from said source and a second surface facing light emergent from said second surface. The apparatus further comprises a light-absorbing repetitive pattern (507, 517) restricting light passing through said lenticular elements to only a desired portion of said lenticular elements, said light-absorbing repetitive pattern being applied on said second surface of said lenticular means. Use of the autostereoscopic display apparatus in a 3D display and/or multi-view static or dynamic display is also disclosed.

Abstract: The present invention relates to controlling contrast in at least part of a picture. The contrast control is performed by reducing the saturation (2–4) of the picture during contrast increase (1).

Abstract: A display device (506) is driven in a number of sub-fields. Each of the sub-fields is for outputting a respective illumination level by the display device. In each sub-field, a pixel of the displayed image may emit an amount of light corresponding to the particular sub-field, depending on whether it is switched on or not. A required intensity level of the pixel is realized by selecting an appropriate combination of sub-fields in which the pixel is switched on. A selection is made from the possible intensity levels that can be generated by all possible combinations of sub-fields. This selection contains those intensity levels that can be generated by sub-fields that are temporally close together, thus causing that the light of a pixel is emitted during a relatively short period. The image display unit (300) has a look-up table (306) for storing the combinations of sub-fields for the respective selected intensity levels.

Abstract: A display device (506) is driven in a number of sub-fields. Each of the sub-fields is for outputting a respective illumination level by the display device. In each sub-field, a pixel of the displayed image may emit an amount of light corresponding to the particular sub-field, depending on whether it is switched on or not. A required intensity level of the pixel is realized by selecting an appropriate combination of sub-fields in which the pixel is switched on. A selection is made from the possible intensity levels that can be generated by all possible combinations of sub-fields. The selected intensity levels are uniformly spaced on a perceptual scale, allowing a relatively small number of intensity levels for displaying an image with a relatively high perceived quality. The image display unit (300) has a the combinations of sub-fields for the respective selected intensity levels.

Abstract: A full-bridge driver circuit comprising four controllable switches supplies a voltage having alternating polarities between a first and a second electrode of a flat panel display. A series arrangement of a capacitance present between the first and a second electrode, an inductor, and a diode, is arranged in parallel with one of the switches. The diode is poled to be conductive during a resonance phase. The control circuit closes one of the switches so that the inductor and the capacitance form a resonant circuit to reverse the polarity of the voltage in an energy-efficient way without requiring any other controllable switches than the ones forming the full-bridge driver circuit.

Abstract: The present invention relates to controlling contrast in at least part of a picture. The contrast control is performed by reducing the saturation (2-4) of the picture during contrast increase (1).

Abstract: An LLC power converter has an output voltage which is determined by a frequency controller controlling the frequency of an on and off switching of the switches (5, 6) of the converter. In order to stabilize the output voltage at varying output currents, a control circuit feeds back the variation of the total current (I) in the converter to the frequency controller (22, 25) for correcting the frequency of the on and off switching of the switches.

Abstract: A full-bridge driver circuit comprising four controllable switches (S1, S2, S3, S4) supplies a voltage (Vp) having alternating polarities between a first and a second electrode (E1, E2) of a flat panel display (FP),wherein a series arrangement of a capacitance (Cp) present between the first and a second electrode (E1, E2), an inductor (L1), and a diode (D1) is arranged in parallel with one of the switches (S1), and the diode (D1) is poled to be conductive during a resonance phase (P3) wherein the control circuit (CC) closes one of the switches (S1) so that the inductor (L1) and the capacitance (Cp) form a resonant circuit to reverse the polarity of the voltage (Vp) in an energy-efficient way without requiring any other controllable switches than the ones forming the full-bridge driver circuit.