Abstract:
A photosensitive layer of or for a cathode ray tube is illuminated by means of a laser illumination arrangement. The laser illumination arrangement comprises a homogenizer which serves to reduce the coherence of the laser beam.
Abstract:
A circuit arrangement (40) and display apparatus are described for use in 3-D graphics, where 2-D texture maps stored at different resolutions in a pyramidal array are indexed by a pair of texture coordinates and an associated level coordinate (L). In order to introduce depth cues to the 2-D transformed image of the 3-D environment, a focus depth (F) for the image is specified and those image components having a depth (z) other than the focus depth have their texture blurred to direct the viewer's eye to the depth of interest. The texture blurring is introduced by applying an offset (FS) to the level coordinate (L) indexing the pyramidal array in an amount determined by the distance to the focus depth.
Abstract:
Encoding device for encoding a program and recording device. When a program of a certain duration is converted into compressed data (encoded), it is desirable for the total number of data to fit in an available data space, for example, when recorded on an information carrier. More particularly in variable bit rate compression such as a video signal via MPEG-2, this is hard to forecast. For this purpose, a recording device according to the invention comprises a compression unit (22) whose bit rate is influenced by a system controller (45) via a control input (26) during the encoding process in dependence on the remaining part of the vacant data space on the information carrier (1) and the remaining duration of the program. When parameters influencing the bit rate are set in the compression unit (22), the system controller will take the complexity of the program derived during a previously encoded part of the program into account. Furthermore, a separate encoding device is described arranged for receiving time information and data space information and there is also described the control of the bit rate of a compression unit (22) in dependence on the time, data space and program complexity information.
Abstract:
An apparatus is disclosed for controlling pixel addressing of a pixel display device to drive the display device as an N view autostereoscopic display. A graphics controller (40) generates multiple views of a scene from different viewpoints. The graphics controller (40) selectively accesses a combined image memory buffer (43), so that portions of each view are written by the graphics controller (40) to allocated areas of the combined image memory buffer (43). A display (54) is driven according to the data in the combined memory buffer. This arrangement reduced data transfer volume for the generation of image data which comprises interleaved portions from individual images.
Abstract:
A semiconductor body (11) has first and second opposed major surfaces (11a and 11b). First and second main regions (13 and 14) meet the second major surface (11b) and a voltage-sustaining zone is provided between the first and second regions (13 and 14). The voltage-sustaining zone has a semiconductor region (11) of one conductivity type forming a rectifying junction (J) with a region (15) of the device such that, when the rectifying junction is reverse-biased in one mode of operation, a depletion region extends in the semiconductor region of the voltage-sustaining zone. A number of conductive regions (22) are isolated from and extend through the semiconductor region (11) in a direction transverse to the first and second major surfaces (11a and 11b) so as to be spaced apart in a direction between first and second main regions. A voltage regulator (20; 20null; 20a and 20b) is provided for setting the voltage at each conductive regions (22) so as to control the voltage distribution, and thus the electrical field profile, in the voltage- sustaining zone when the rectifying junction is reverse-biased in said one mode of operation.
Abstract:
A method of generating a plurality of images for display of a 3D scene from different viewpoints comprises generating a model of the scene using a homogenous coordinate system which uses first, second and third orthogonal axes and a homogeneity value. A first display image is obtained from a first viewpoint and one or more further display images are obtained by updating the a coordinate value of the first display image using the displacement value and the homogeneity value. The use of the homogeneity value reduces the complexity of the calculations required to obtain the further images by post processing.
Abstract:
The device integrates, on a synthetic material foil, a system for detecting the action of keys of a keyboard and a homogeneous illumination system for the keyboard. A film 10 is folded into two parts 11 and 12. Domes 13 are preformed on the upper part 11 and a detection circuit 16 is printed on the lower part 12. Contact electrodes 15 are fixed under each dome 13 so as to realize an electric contact with the detection circuit 16 when the dome 13 is pressed by means of a key 22 of the keyboard 20. The keys of the keyboard are illuminated by an electroluminescent ink 17 between the domes 13, deposited on a plane surface 18 of the upper part 11 of the synthetic material foil 10.
Abstract:
The system comprises a display device with a pattern of pixels (3) controlled by a control circuit (8) and a backlight system for illuminating the display device, which backlight system comprises a light-emitting panel and a light source (16, 16null, 16null, . . . ) associated with the light-emitting panel. The light source comprises a plurality of light-emitting diodes (LEDs) of at least two different colors. The control circuit (8) also controls the luminous flux of the LEDs. Preferably, the intensity of the light emitted by the LEDs (16, 16null, 16null) varies with the light level of the image to be displayed by the display device. Preferably, the intensity of the light emitted by the backlight system can be controlled on a frame-to-frame basis and, preferably, also for each color. Preferably, the LEDs comprise a plurality of red, green, blue (and amber) LEDs, each, preferably, having a luminous flux of at least 5 lumen. The color point of an image to be displayed on the display screen of the display device is set by the backlight system, enabling an optimum contrast to be obtained for the image to be displayed by the display device.
Abstract:
The invention relates to a head-mounted display provided with an image display device and an optical system. The optical system comprises a first null/4 plate, a lens element, a semi-transmissive mirror, a second null/4 plate and a polarization-dependent mirror, arranged, in this order, from the incident side for projecting an image to be formed by the image display device on a user's retina.
Abstract:
The invention relates to a semiconductor device comprising a substrate (1) comprising for instance silicon with thereon a layer (2, 4) comprising at least organic material which contains a passage (6, 8) to the substrate (1). The passage (6,8) has walls (7, 9) transverse to the layer (2, 4). A metal layer (11) is applied on the substrate (1) in at least that portion which adjoins the passage (8). The organic material forming the walls (7, 9) of the passage (6, 8) is covered with an oxide liner (12), and the passage (6, 8) is filled with a metal (14). According to the invention, a metal liner (13) comprising Ti or Ta is provided between the oxide liner (12) and the metal (14) filling the passage (6, 8). It is achieved by this that the device has a better barrier between the organic material (2, 4) and the interconnection metal (14) and that the organic material (2, 4) has a better protection during the various steps of the process.