Abstract: The present invention relates to an arrangement (10) for a merchandise display system. The arrangement comprises a detector (5) arranged to detect the presence of a person (8) in the proximity of a display region (2) adapted to accommodate a piece of merchandise (3), a temperature adjustment device (4) arranged to adjust the temperature in the proximity of the display region, and a controller (6) configured to, based on the detection, control the temperature adjustment device. The present invention is advantageous in that the temperature difference may contribute to how the piece of merchandise is perceived by the person.

Abstract: The present invention relates to an arrangement (10) for a merchandise display system. The arrangement comprises a detector (5) arranged to detect the presence of a person (8) in the proximity of a display region (2) adapted to accommodate a piece of merchandise (3), a temperature adjustment device (4) arranged to adjust the temperature in the proximity of the display region, and a controller (6) configured to, based on the detection, control the temperature adjustment device. The present invention is advantageous in that the temperature difference may contribute to how the piece of merchandise is perceived by the person.

Abstract: The invention relates to an active matrix display device comprising a display with a plurality of display pixels, each having a current driven emissive element, a data input for receiving an analogue data signal, at least one drive element connected to a power supply and arranged to drive the current emissive element in accordance with the data signal and selecting means arranged to provide, in response to a select signal, the data signal to the at least one drive element to generate an overall brightness level during a frame period in accordance with the data signal. The device is adapted to divide the frame period in at least a first sub-period during which the emissive element carries a first non-zero current and a second sub-period during which the emissive element carries a second non-zero current, the at least first and second non-zero current yielding the overall brightness level.

Abstract: The invention relates to an active matrix display device comprising a display with a plurality of display pixels, a data input for receiving a data signal and a controller for distributing said data signal over said display pixels to generate an image on said display with an overall brightness value for each display pixel during at least one frame period. The device is adapted to divide said frame period for at least one subset of said display pixels such that said display pixels of said at least one subset have at least a light output at a first non-zero brightness level during a first sub-period of said frame period and at a second non-zero brightness level during a second sub-period of said frame period, the time averaged sum of said brightness levels being substantially equal to said overall brightness level.

Abstract: Controlling a lighting system, which comprises a controller (2, 10), lighting units (6), and a sensing device. Each lighting unit comprises a lighting source (12) and a modulated light source (14). A single light source may be used to function as both the lighting source and the modulated light source. Each modulated light source emits uniquely modulated light. A radiation pattern of each modulated light source coincides substantially with a radiation pattern of a lighting source of the same lighting unit. The sensing device is suitable to sense modulated light in a viewing area. Lighting units from which the sensing device senses modulated light are identified from the modulation of that modulated light. The sensing device measures the intensity of the modulated light from the identified lighting unit. The lighting sources are controlled dependent on control data which comprises measuring values of measured light intensities.

Abstract: A scanning backlight unit (BU) for a matrix display comprises a plurality of light sources (L1, . . . , Ln). A driver (2) supplies drive signals (D1, . . . , Dn) to the light sources (L1, . . . , Ln). A controller (3) controls the driver (2) to separately activate the light sources (L1, . . . , Ln) to obtain light-emitting regions (5) being active. A light sensor (4) is associated with a group of at least two of the light sources (L1, . . . , Ln) to supply a sensor signal (SES) which indicates a luminance (LU) of the group. The controller (3) reads the sensor signal (SES) at different instants (ts1, . . . , tsn) at which mutually different subsets of the light sources (L1, . . . , Ln) of the group are active to control the driver (2) to supply power levels to the light sources (L1, . . . , Ln) of the group to obtain a luminance (LU1, . . . , LUn) of each one of the light sources (L1, . . . , Ln) of the group in dependence on the sensor signal (SES).

Abstract: A portable illumination device, for illuminating an object through a medium having an absorption coefficient, has a lighting unit including at least two differently colored light sources for emitting light having a color distribution and a control unit for adjusting the color distribution. The control unit is adapted to receive a distance estimate corresponding to the distance between the illumination device and the object, and adjust the color distribution depending on the distance estimate, such that light reflected from the object is perceived to have substantially correct color reproduction.

Abstract: A liquid crystal display comprising first and second liquid crystal display panel (1, 3), each defining an array of picture elements (13, 15). The resolution of the image displayed on the second liquid crystal display panel (3) is lower than that of the image displayed on the first liquid crystal display panel (1). The picture elements (15) of the second liquid crystal display panel (3), located between the first liquid crystal display panel (1) and backlighting means (2) may be relatively large and preferably partially overlap at least in one direction. A charge is selectively applied to the picture elements (15) of the second liquid crystal display panel (3) corresponding to the relatively darker portions of the image to be displayed on the first liquid crystal panel (1), so as to at least limit the amount of light reaching these portions of the first liquid crystal display panel (1) and thereby increasing the contrast trio of the device.

Abstract: The present invention relates to a portable illumination device (100) for illuminating an object (200) through a medium having an absorption coefficient, the illumination device (100) comprising a lighting unit (101) including at least two differently colored light sources (Li-L3) for emitting light having a color distribution, and a control unit (105) for adjusting the color distribution. The control unit (105) is adapted to receive a distance estimate corresponding to the distance between the illumination device (100) and the object (200), and adjust the color distribution depending on the distance estimate, such that light reflected from the object is perceived to have substantially correct color reproduction. An advantage with the invention is that an object (200) illuminated through a medium will be perceived by a user using the portable illumination device (100) as having a substantially correct color reproduction.

Abstract: A scanning backlight unit (BU) for a matrix display comprises a plurality of light sources (L1, . . . , Ln). A driver (2) supplies drive signals (D1, . . . , Dn) to the light sources (L1, . . . , Ln). A controller (3) controls the driver (2) to separately activate the light sources (L1, . . . , Ln) to obtain light-emitting regions (5) being active. A light sensor (4) is associated with a group of at least two of the light sources (L1, . . . , Ln) to supply a sensor signal (SES) which indicates a luminance (LU) of the group. The controller (3) reads the sensor signal (SES) at different instants (ts1, . . . , tsn) at which mutually different subsets of the light sources (L1, . . . , Ln) of the group are active to control the driver (2) to supply power levels to the light sources (L1, . . . , Ln) of the group to obtain a luminance (LU1, . . . , LUn) of each one of the light sources (L1, . . . , Ln) of the group in dependence on the sensor signal (SES).

Abstract: Controlling a lighting system, which comprises a controller (2, 10), lighting units (6), and a sensing device. Each lighting unit comprises a lighting source (12) and a modulated light source (14). A single light source may be used to function as both the lighting source and the modulated light source. Each modulated light source emits uniquely modulated light. A radiation pattern of each modulated light source coincides substantially with a radiation pattern of a lighting source of the same lighting unit. The sensing device is suitable to sense modulated light in a viewing area. Lighting units from which the sensing device senses modulated light are identified from the modulation of that modulated light. The sensing device measures the intensity of the modulated light from the identified lighting unit. The lighting sources are controlled dependent on control data which comprises measuring values of measured light intensities.

Abstract: The invention relates to an active matrix display device comprising a display with a plurality of display pixels, a data input for receiving a data signal and a controller for distributing said data signal over said display pixels to generate an image on said display with an overall brightness value for each display pixel during at least one frame period. The device is adapted to divide said frame period for at least one subset of said display pixels such that said display pixels of said at least one subset have at least a light output at a first non-zero brightness level during a first sub-period of said frame period and at a second non-zero brightness level during a second sub-period of said frame period, the time averaged sum of said brightness levels being substantially equal to said overall brightness level.

Abstract: The invention relates to an active matrix display device comprising a display with a plurality of display pixels, each having a current driven emissive element, a data input for receiving an analogue data signal, at least one drive element connected to a power supply and arranged to drive the current emissive element in accordance with the data signal and selecting means arranged to provide, in response to a select signal, the data signal to the at least one drive element to generate an overall brightness level during a frame period in accordance with the data signal. The device is adapted to divide the frame period in at least a first sub-period during which the emissive element carries a first non-zero current and a second sub-period during which the emissive element carries a second non-zero current, the at least first and second non-zero current yielding the overall brightness level.

Abstract: The invention relates to an active matrix display system and a method of operating such a system. The system comprises an active matrix display panel and a scanning backlight including several light members (3a-e) each of which illuminates a pixel line or a sector of pixel lines, in a fully activated state (8) of high light intensity for a limited period of time when the pixel lines in that sector have been addressed (6a-e) according to a video signal and have reached a new fully or nearly fully modulated state. This is done to eliminate or reduce the tendency of the so called “Sample and Hold” artefact when displaying fast moving objects on the display. According to the invention the light members (3a-e) are not switched off completely during a time period between two successive fully activated states of high light intensity.

Abstract: Matrix display devices are addressed, using a multiple line addressing method. In such a method, two or more paired lines are addressed at the same time and receive the same luminance value data. A method is provided where the line multiplet is shifted by a number of lines (preferably one) for two successive subframes, and where the average of the values over the subframes is equal to the original luminance value data. Further improvements of the method comprise clipping of out-of-range values, and flicker reduction by limiting the differences between the luminance values for two successive frames.

Abstract: A dithering method converts an input pixel value of n+k bits into an output pixel value of n bits by truncating k bits. The truncated part of k bits is compared with a pseudo random number. If the value of the k bits is larger than or equal to the value of the pseudo random number, than the output pixel value is made equal to 1 plus the input value of the n bits.

Abstract: Matrix display devices are addressed, using a multiple line addressing method. In such a method, two or more paired lines are addressed at the same time and receive the same luminance value data. A method is provided where the line multiplet is shifted by a number of lines (preferably one) for two successive subframes, and where the average of the values over the subframes is equal to the original luminance value data.