Abstract: A full color high brightness reflective display (200, 250, 300, 350) is formed from individual multifaced pyramid-like reflectors (400, 450, 500, 600, 725, 800). Each face (410, 420, 460, 470 510, 520, 610, 620, 730, 740, 810, 820) of the reflector specularly reflects two of the three primary colors of incident light (461, 481, 581, 661, 781, 861), and can be controlled to either reflect, diffusely or specularly, or absorb the other primary color, thereby controlling a color of reflected light (462, 482, 582, 662, 782, 862). A liquid crystal layer (415, 425, 465, 475) may be used at each face, with a polarization filter (480) at the entrance to the reflector, or combined with the layer. An electro wetting cell (514, 524) or an electrophoretic layer (615, 625) may also be used. A deposition layer formed by reversible metal deposition may be used. A movable, dynamic foil mechanism (850) may also be used.

Abstract: The invention relates to a projection display device (10, 40, 60, 70) for casting an image onto a projection screen (26, 56, 86). The device comprises a spatial light modulator (16, 46, 62, 76) including an array of light modulating elements (18, 48, 78), and a light source (12, 42, 72) arranged to illuminate the modulator. The device is characterized in that each light modulating element of the modulator is illuminated by light diverging in a least one dimension, which light is spatially modulated by the modulator and cast onto the projection screen. An advantage with the projection display device according to the invention is that it can be realized in a very compact fashion. The invention further relates to a hand held device comprising such projection display device.

Abstract: The invention provides for a method and display apparatus (10) having driving circuitry for driving a display panel (24) having a plurality of addressable discharge cells (26) driven by display pulses (DP), including the steps of applying data pulses (DAP) during the time interval between display pulses (DP) and characterized by the step of priming charges for each of the discharge cells (26) by means of the reset discharges so as to reduce the required data voltage, and in particular such a method wherein one TV-field period (TF) is divided into a plurality of sub-fields (SF) all of which are of substantially equal time durations.

Abstract: In a stereoscopic display apparatus having optical directory elements such as lenticular elements (4) extending parallel to each other and being slanted at an angle to one of the rows and columns of picture element the picture elements (2) are positioned out of focus at the optical directory elements, in such a manner that the modulation depth of “dark bands” is minimized.

Abstract: A projection system is described for displaying image information, comprising an illumination system for generating a light beam, a scanning device comprising a mirror for scanning the generated light beam to form an image on a screen, and a scan angle enlarger cooperating with the scanning device for enlarging a scan angle of the generated light beam. The scan angle enlarger comprises a reflective polarizer, a quarter-wave plate and a mirror arranged to reflect the light beam at least once between the reflective polarizer and the mirror via the quarter-wave plate. This arrangement allows a compact assembly of the projection system for use in small portable devices such as mobile phones and PDAs.

Abstract: A multiview display device (600) for displaying multiple views, the multiple views having respective viewing angles related to an object to be displayed is disclosed. The display device comprises optical means (1108) for displaying multiple viewing cones, a first one of the multiple viewing cones having an angular distribution (630) of the views relative to the display device; and driving means (1106) for providing the optical means (1108) with sets of image data corresponding to the respective views. The sets of image data are provided such that the angular distribution (630) has a first part of adjacent views with increasing viewing angle and a second part of adjacent views with decreasing viewing angle and the angular distribution (630) has a first one of the views in between a maximum view which corresponds to a maximum viewing angle and a minimum view which corresponds to a minimum viewing angle.

Abstract: The invention relates to a field emission device, and a method of manufacturing same. The field emission device comprises a gate electrode (140, 340, 440) which is provided with a pattern of electron passing apertures (135, 335, 435). The gate electrode (140, 340, 440) is arranged near particles (110, 310, 410) distributed on a substrate (125, 325, 425), at least a part of said particles (110, 310, 410) being arranged for emitting electrons. By means of the gate electrode (140, 340, 440), an electric field is applicable by means of which emitting particles emit electrons. Particularly good electron emission is obtained, because the pattern of apertures (135, 335, 435) is similar to the distribution of particles (110, 310, 410) on the substrate. This is achieved by means of the manufacturing method, in which the particles (110, 310, 410) are used in an illumination step to mask regions (155, 355) of a photo layer (150, 352).

Abstract: A backlight (5) for a 3D display device, the backlight (5) comprising a planar light guide (7) through which light is guided transversely by internal reflection. The light guide (7) is provided with a plurality of grooves (8), which are configured to direct light propagating within the light guide (7), out of a face (7f) of the light guide (7) so as to form a plurality of line light sources.

Abstract: A display device for displaying a three dimensional image such that different views are displayed according to the viewing angle has a display panel with a plurality of separately addressable pixels for displaying said image. The pixels are grouped such that different pixels in a group correspond to different views of the image. The pixels are configured in colour clusters for each physical location within the image, a cluster comprising three pixel groups each corresponding to a different primary colour. A display driver controls a transmission characteristic of each pixel to generate an image according to received image data. The drive signals applied to each pixel in the display panel are adjusted using colour correction values that vary the optical transmission of each pixel within a group and each group within a cluster so as to produce an image colour for each cluster that is independent of viewing direction.

Abstract: A display device comprising a light guide (12), a front plate (14), and an intermediate electromechanically operable foil (16). Two electrode layers (22, 23) are arranged on either side of the foil (16) to induce electrostatic forces on the foil (16) and to bring selected portions of the foil into contact with the light guide (12), thereby extracting light from the light guide (12). The second electrode layer (22) is arranged on the opposite side of the light guide (12) with reference to the foil (16), and separated from the light guide (12) by means of a refractive layer (28). As no electrode layer is required on the light guide itself, the light path of rays extracted from the light guide is cleaner, and the absorption of light is reduced.

Abstract: A two dimensional scanning device, for use in a projecting display, comprising a surface (53) suspended by at least two torsion elements (55) defining a torsion axis (B), and a first actuator (60, 61) for pivoting said surface (53) around said torsion axis (B). The scanner further comprises a cantilever beam (51) having one end fixed in relation to said surface and an opposite end arranged to bend around a bending axis (A) non-parallel to said torsion axis (B). The cantilever beam (51) is provided with a reflective surface and a second actuator (58) is arranged to bring said cantilever beam to oscillate at its resonance frequency. The combination of a slow torsion scanner and a faster cantilever scanner 10 provides a two dimensional scanner capable of scanning a laser beam in a raster pattern to project an image.

Abstract: A display for displaying and storing images comprises an optically addressable electrophoretic display (PD) with a stack of a photoconductive layer (PCF) and an electrophoretic layer (EF) being sandwiched between electrodes (E1, E2). An optical addressing means (AD) supplies addressing light (AL) to the photoconductive layer (PCF). A controller (CO) controls a driver (DR1) to supply a drive voltage (DV) between the electrodes (E1, E2) with a value enabling a change of the optical state of the electrophoretic layer (EF) in response to the addressing light (AL) impinging on the photoconductive layer (PCF). Finally, the power consumption of the optical addressing means (AD) is minimized.

Abstract: The present invention relates to an optical imaging system. The system comprises at least one light source for producing at least one light beam (10). Beam shaping optics (11) arranged to expand the at least one light beam (10) in one direction. At le',ast one one-dimensional array of beam switches (1) is arranged to receive the expanded at least one light beam (10) and modulate it to form a line image. A projection lens (12) is provided for projecting said line image. A slow mirror scanner (13) is arranged to scan consecutive line images to form a two-dimensional image.

Abstract: A flat panel display apparatus comprises plasma discharge cells, which formed between a first base plate (2a) and a second base plate (1a). The first base plate (2a) has pairs of sustain electrodes (2b, 2c), and a second base plate (1a) has data electrodes (1b). Between said electrodes (2b, 2c, 1b) discharge volumes are formed. The device further has a drive circuit which comprises a circuit for providing data to the discharge cells. The display device comprises a conductive layer (51, 72, 91, 101) on the first (2a) or second substrate (1a) for both of a pair of sustain electrodes (2b, 2c). Said conductive layer (51, 72, 91, 101) extends outside the discharge volume (4) and forms an internal capacitance (Cpar) in the display device which capacitance is in parallel to the capacitance formed in operation by the pair of sustain electrodes and the discharge.

Abstract: The invention relates to a method of controlling a display screen, particularly a foil display built up of a number of lines, the display screen comprising at least one light source, a movable element, and selection means for locally bringing the movable element into contact with the light source, in which the selection means comprise row and column electrodes and means for applying control voltage signals to the invention also relates to a display source, a movable element, and selection means for locally bringing the movable element into contact with the light source, in which the selection means comprise row and column electrodes and means for applying control voltage signals to the row and column electrodes. Because of a minimum switching time of pixels, not all pixels, i.e. lines can be activated immediately when the display screen is addressed line by line.

Abstract: A display unit comprising electro-wetting pixels (1300) is provided. The inventive pixels (1300) provide bistable or multi-stable pixel states and thus facilitates passive matrix addressing. For this purpose an additional electrode (1305) is arranged for each multi-stable state. Consequently, each pixel comprises one counter electrode (1306) and at least one pair of address and retain electrodes (1304, 1305). In order to activate a pixel, an address potential is applied to the address and retain electrodes (1304, 1305) in relation to the counter electrode (1306), and in order to deactivate a pixel the potential is removed. In order to retain a current pixel state a retain potential is applied to only the retain electrode (1305) in relation to the counter electrode (1306); the current pixel state, be it active or passive, will then be preserved and the retain potential configuration thus provides a bistable pixel state.

Abstract: A display device (1) comprises a luminescent display screen (15), and means for directing electrons towards the display screen (15). Said means comprises comprise an arrangement of at least three plates (36, 41, 42), with a middle plate (36) having selection apertures, and selection electrodes associated with the selection apertures. The selection apertures, the selection electrodes and the plates are arranged for having the electron currents, on their way from a source to the electroluminescent screen, selectively pass the apertures in the middle plate and alternately run at opposite sides of the middle plate. An anti-leakage layer (44 eg) for providing in operation a tunneling counteracting potential is provided on a plate of the arrangement to prevent leakage electrons through gaps between the middle plate and an adjacent plate.

Abstract: A display device comprising a plurality of pixels (26), a light source (23), and addressing means (24, 25) for coupling a selected pixel to said light source to thereby emit light, wherein the addressing means (24, 25) are arranged to address each pixel using pulse-width modulation (PWM). Further, the display comprises means (20) for amplitude modulating the intensity of said light source (23). The combination of the two modulations generates an exponentially distributed emitted light intensity, enabling proper gray scale rendering for a limited resolution in the time domain.

Abstract: The invention relates to a cathodoluminescent gas discharge display having a reversed plasma direction, wherein secondary electrons (e?) generated by the impact of plasma ions (I+) on a cathode (5) are used to excite a luminescent substance (6). An advantage of the invention is that the ion feedback flow is reduced, which implies the application of a higher acceleration voltage and consequently a higher luminous efficacy.

Abstract: A three electrode PDP comprises a scan driver (SD) which supplies a substantially sine wave shaped voltage (VS) between first and the second scan electrodes (SEi, CEi), an amplitude of the substantially sine wave shaped voltage (VS) being large enough to sustain plasma cells (PCij), but being too small to ignite the plasma cells (PCij). A data driver (DD) supplies a substantially pulse shaped voltage (VD) to the data electrodes (DEi) for controlling an amount of light produced by the plasma cells (PCij). The sine wave shaped voltage may have a predetermined frequency such that more than one stable light output level is obtained.