Koninklijke Philips Corporation N.V.

Philips Lighting Holding B.v.

Nebojsa Fisekovic

Mark Thomas Johnson

Carsten Deppe

Johan Paul Marie Gerard Linnartz

Peter Luerkens

Jeroen Hubert Christoffel Jacobus Stessen

Johan P M G Linnartz

Ulrich Boeke

Martin Hillebrand Blees

Ludo Haenen

Mikhail Victorovich Sorokin

Klaas Vegter

Tore Nauta

Bennie Simpelaar

Wilhelmus Frederik Laurens Maria Hoeben

Sel-Brian Colak

Franciscus Johannes Stommels

Ferry Barrois

The present invention relates to an arrangement () for a merchandise display system. The arrangement comprises a detector () arranged to detect the presence of a person () in the proximity of a display region () adapted to accommodate a piece of merchandise (), a temperature adjustment device () arranged to adjust the temperature in the proximity of the display region, and a controller () 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.

Merchandise display system

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.

OLED display device

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.

Method for controlling pixel brightness in a display device

Controlling a lighting system, which comprises a controller (), lighting units (), and a sensing device. Each lighting unit comprises a lighting source () and a modulated light source (). 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.

Illumination control

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

Scanning backlight for a matrix display

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.

Portable illumination device

Matrix display device with improved image sharpness

Growing community of inventors

Eindhoven, Netherlands

Nebojsa Fisekovic