Abstract: A display device is provided that comprises a liquid crystal display panel (2) for displaying an image by spatial light modulation. The image is represented by a plurality of image elements each having an image data value (7). The display device further comprises a display controller (1) arranged to determine a signal voltage to be applied to the panel (2) for each image element in dependence upon its image data value (7) and a secondary data value (8) for the element, there being a predetermined mapping between the data values and the signal voltage. The secondary data values (8) are arranged to vary across the image so as to introduce variations in luminance as a result of the mapping. The mapping and secondary data values (8) are mutually arranged to take account of the signal voltage to on-axis luminance response of the panel (2) so that the luminance variations introduced on-axis tend to balance locally through spatial averaging to, and hence would not be perceivable by, an on-axis viewer (3).

Abstract: A method of processing an image comprises: receiving pixel data constituting an image, the pixel data including at least four sub-pixel color components having respective data values, and modifying one or more of the sub-pixel color component data values. The data values of corresponding sub-pixels from two pixels are modified in opposite directions to one another and such that the overall luminance of the display panel appears substantially unchanged to an on-axis viewer of the display panel.

Abstract: A tactile feedback actuator includes a first electrode and a second electrode separated by a gap, and a surface layer above the first and second electrodes. The first electrode receives a first stimulus voltage at a first frequency and the second electrode receives a second stimulus voltage at a second frequency, and the first and second electrodes superimpose the first and second stimulus voltages to generate a total voltage that has a beat frequency less than a perception threshold frequency. An object in contact with a portion of the surface layer is caused to vibrate at the beat frequency. The first electrode and the second electrode may constitute an electrode array including a plurality of column electrode segments, and a plurality of row electrode segments. An object in contact with a portion of the surface layer above one or more electrode segments is caused to vibrate at the beat frequency.

Abstract: A display comprises a parallax optic (2), such as a combined parallax barrier and lens array, and a pixellated display device (1). The pixels of the display device (1) are arranged as groups cooperating with a parallax element (4) of the parallax optic (2). Each group comprises a first pixel (A) aligned with the centre of the parallax element (4), second and third pixels (B, C) on either side of the first pixel (A), and fourth pixels (D) shared with adjacent groups and disposed outside the second pixels (B, C). The parallax elements (4) make the different pixels of each group visible in different viewing regions. A control arrangement selects regions of the display and selects different combinations of the pixels of each group for image display within respective regions so as to provide simultaneously-present different viewing modes having different viewing range characteristics.

Abstract: An apparatus extracts water from the air using a single circuit of gas containing a compressor, a cooling element, a heat exchanger and an ion source, where a single stream of air is used to provide water and to pre-cool the inlet air.

Abstract: A tactile feedback actuator includes a first electrode and a second electrode separated by a gap, and a surface layer above the first and second electrodes. The first electrode receives a first stimulus voltage at a first frequency and the second electrode receives a second stimulus voltage at a second frequency, and the first and second electrodes superimpose the first and second stimulus voltages to generate a total voltage that has a beat frequency less than a perception threshold frequency. An object in contact with a portion of the surface layer is caused to vibrate at the beat frequency. The first electrode and the second electrode may constitute an electrode array including a plurality of column electrode segments, and a plurality of row electrode segments. An object in contact with a portion of the surface layer above one or more electrode segments is caused to vibrate at the beat frequency.

Abstract: A single view display of reduced power consumption is provided. The display comprises a display device for displaying the single view and an optical system for concentrating light modulated by the single view into a reduced angular range. A viewer direction determining system determines the direction of a viewer relative to the display and controls the display device and the optical system so that the angular range includes the direction of the viewer.

Abstract: A method and apparatus is provided for reducing color shift in relation to viewing angle in an LCD. The method includes receiving a plurality of pixel data constituting an image, each pixel data including a plurality of sub-pixel color components having respective data values; for each of the pixel data, comparing the sub-pixel color component data values included therein; and based on the comparison, modifying the sub-pixel color component data values included in the pixel data to reduce color shift when displayed on the LCD.

Abstract: An optical system is provided for use with a display device to convert a flat image from the display device to a non-flat image. The optical system comprises first and second spaced-apart partial reflectors, at least one of which is non-flat. The reflectors, together with polarization optics, provide a light path such that light from the display is at least partially transmitted by the first reflector, partially reflected by the second reflector, partially reflected by the first reflector and partially transmitted by the second reflector so that a viewer perceives a non-flat, for example curved, image. Light which does not follow the light path is prevented from leaving the optical system.

Abstract: A method of processing an image comprises: receiving pixel data constituting an image, the pixel data including at least four sub-pixel colour components having respective data values, and modifying one or more of the sub-pixel colour component data values. The data values of corresponding sub-pixels from two pixels are modified in opposite directions to one another and such that the overall luminance of the display panel appears substantially unchanged to an on-axis viewer of the display panel.

Abstract: In one embodiment of the present invention, a drive circuit includes: a logic block connected between a source of a first voltage and a source of a second voltage, and a sampler including a plurality of sampling circuits. Each sampling circuit is for sampling, in use, an input data signal and outputting a voltage to a respective output. The drive circuit further includes a voltage booster having plurality of voltage boost circuits, each voltage boost circuit being associated with a respective one of the sampling circuits and, in use, generating a boosted voltage signal and providing the boosted voltage signal to the respective sampling circuit. Each voltage boost circuit is connected between the source of the first voltage and the source of the second voltage. The logic block may be, but is not limited to, a shift register.

Abstract: A camera including an imaging system having a first depth of field for one or more first frequencies of optical radiation and a second depth of field, smaller than the first depth of field, for one or more second frequencies of optical radiation. The imaging system includes an iris having a first aperture for the first frequency(ies) of optical radiation and a second aperture, larger than the first aperture, for the second frequency(ies) of optical radiation. The first aperture is defined by an outer opaque ring and the second aperture is defined by an inner chromatic ring. The inner chromatic ring blocks the first frequency(ies) and passes the second frequency(ies) such that the image formed by the first frequency(ies) is sharper than the image formed by the second frequency(ies), and that sharpness may be transposed to other images by known image processing techniques.

Abstract: A method and apparatus is provided for reducing colour shift in relation to viewing angle in an LCD. The method includes receiving a plurality of pixel data constituting an image, each pixel data including a plurality of sub-pixel colour components having respective data values; for each of the pixel data, comparing the sub-pixel colour component data values included therein; and based on the comparison, modifying the sub-pixel colour component data values included in the pixel data with respect to two or more of the plurality of sub-pixel colour components to reduce colour shift when displayed on the LCD.

Abstract: A light guide includes a light guide substrate having a top surface through which light is to be emitted, a bottom surface, an incident edge surface through which incident light is to be introduced into the light guide substrate, and another edge surface. The another edge surface includes at least one micro structure operative to reflect at least a portion of the incident light, which travels through the light guide substrate and is incident on the another edge surface, back within the light guide substrate.

Abstract: A display comprises a parallax optic (2), such as a combined parallax barrier and lens array, and a pixellated display device (1). The pixels of the display device (1) are arranged as groups cooperating with a parallax element (4) of the parallax optic (2). Each group comprises a first pixel (A) aligned with the centre of the parallax element (4), second and third pixels (B, C) on either side of the first pixel (A), and fourth pixels (D) shared with adjacent groups and disposed outside the second pixels (B, C). The parallax elements (4) make the different pixels of each group visible in different viewing regions. A control arrangement selects regions of the display and selects different combinations of the pixels of each group for image display within respective regions so as to provide simultaneously-present different viewing modes having different viewing range characteristics.

Abstract: A display device is provided that comprises a liquid crystal display panel (2) for displaying an image by spatial light modulation. The image is represented by a plurality of image elements each having an image data value (7). The display device further comprises a display controller (1) arranged to determine a signal voltage to be applied to the panel (2) for each image element in dependence upon its image data value (7) and a secondary data value (8) for the element, there being a predetermined mapping between the data values and the signal voltage. The secondary data values (8) are arranged to vary across the image so as to introduce variations in luminance as a result of the mapping. The mapping and secondary data values (8) are mutually arranged to take account of the signal voltage to on-axis luminance response of the panel (2) so that the luminance variations introduced on-axis tend to balance locally through spatial averaging to, and hence would not be perceivable by, an on-axis viewer (3).

Abstract: A display device is provided, including a signal transmission mechanism that makes it possible to reduce the number of pins on an FPC board connected to a TFT substrate or eliminate the necessity for the FPC board, and that can be readily applied to a compact device. The present liquid crystal display device includes light detectors, a receiver circuit, a display control circuit, a video signal line drive circuit, a scanning signal line drive circuit, and a display portion, which are formed on a TFT substrate of a liquid crystal display panel, and it also includes white LEDs, and an LED drive circuit, which are included in a backlight portion. The LED drive circuit drives the white LEDs, each emitting a light (modulation) signal LS in accordance with an externally-provided video signal VS. The receiver circuit generates (demodulates) the video signal VS based on a signal received via the light detector.

Abstract: An optical system is provided, for example for use with a display device (1) to convert a flat image from the display device (1) to a non-flat image. The optical system comprises first and second spaced-apart partial reflectors (3, 5), at least one of which is non-flat. The reflectors (3, 5), together with polarisation optics (2, 4), provide a light path (6) such that light from the display (1) is at least partially transmitted by the first reflector (3), partially reflected by the second reflector (5), partially reflected by the first reflector (3) and partially transmitted by the second reflector (5) so that a viewer (8) perceives a non-flat, for example curved, image. Light which does not follow the light path (6) is prevented from leaving the optical system.

Abstract: A method and apparatus is provided for reducing colour shift in relation to viewing angle in an LCD. The method includes receiving a plurality of pixel data constituting an image, each pixel data including a plurality of sub-pixel colour components having respective data values; for each of the pixel data, comparing the sub-pixel colour component data values included therein; and based on the comparison, modifying the sub-pixel colour component data values included in the pixel data to reduce colour shift when displayed on the LCD.

Abstract: A touch sensor for a touch display is provided which includes an optical element including at least one electrically conductive layer, the at least one electrically conductive layer being partially reflective and partially transmissive with respect to incident light; and sensing circuitry electrically coupled to the at least one electrically conductive layer to determine positioning of a finger, hand or other type of pointing device relative to the optical element.