Abstract: A game board (2) with a board surface (3) and a scanning display, the scanning display comprises display means for displaying a game board layout on the board surface (3), and detection means for scanning a code surface of a pawn (20) for detecting a pawn code when the code surface of the pawn (20) is directed towards the board surface (3). The game board (2) further comprises or is coupled to a memory (6) for storing a set of codes, and a processor (5) for comparing the detected pawn code to the stored codes to identify the pawn (20). The detection means preferably comprise a plurality of light sensors (12).

Abstract: A system (1) for playing board games comprises a game board (2) and at least one pawn (20). The game board comprises display means (4, 5 and 6) for displaying on a board surface (3) a game board layout. The display means are further arranged to display a pawn input image (22) on the board surface (3). The pawn (20) comprises a contact surface (21) for supporting the pawn (20) on the board surface (3), and an image input part (23) cooperating with the board surface (3) to receive the pawn input image (22). The pawn also comprises an image surface (24) to display a pawn output image (25), and means for conducting (26) the pawn input image (24) from the image input part (23) to the image surface (24).

Abstract: Display apparatus with a display area (2) having a plurality of pixels (9), a mixing unit (3) for preparing a predetermined quantity of color material for one of the plurality of pixels (9), and a transfer unit (4) for transferring the predetermined quantity for a pixel (9) to the associated pixel position in the display area (2). The transfer of color material can be based on an electro-wetting mechanism, an electrophoresis mechanism or a pumping mechanism.

Abstract: The invention relates to a lighting device (1) comprising a lighting unit (2) and a user interface (3) for controlling the lighting colour and/or intensity of the lighting unit (2). The user interface (3) comprises a sensing device (5) with a large number of conductive elements (6), which responds to the proximity of a conductive object, like for instance a human finger pointing to the user interface (3). The user interface (3) can be based on proximity sensing or on touch-control. In both cases an element (6) on the outer surface (4) of the user interface (3) is selected, which corresponds to one of the selectable colours and/or intensities of the lighting unit (2). The selected element (6) generates an output signal which is sent to a processing unit (9), which converts this output signal into a driving signal suitable for the driver circuit (8) to drive the light sources (7).

Abstract: The invention relates to an electrostatic deflection system for deflecting an electron beam (132), and to a matrix display device provided with such an electrostatic deflection system. The deflection system has deflectors (112, 114) for the horizontal and vertical directions, and a focus electrode (110). By applying a sufficiently high voltage difference of for example several kilo Volts between the focus electrode (110) and at least one of the deflectors (112, 114), a bipotential type focusing electron lens is integrated with the deflection system. Thereby, the system achieves simultaneous deflection of the electron beam (132) and focusing of the electron beam onto a surface (140) to be scanned. In a matrix display device, the electron beam (332) may be kept in focus on the display screen (340) thereby obtaining a relatively small spot size and high image quality. Generally, the display screens divided into a number of portions (344). In operation, each portion is scanned by a separate electron beam (332).

Abstract: The present invention relates to a display device (100) arranged to operate in two different modes: a transparent mode and a display mode. The idea of the present invention is that a transparent plate (101) is provided with a plurality of light emitting means (102). The light emitting means are arranged in a grid which defines the pixels of the display device. The area of each light emitting means must be small compared to the area (104) of the corresponding pixel it illuminates, since the plate provided with the light emitting means must appear transparent to the human eye. A first switchable diffuser (103) is placed in front of the plate. Thus, the display device will appear virtually transparent when the diffuser is operated in the transparent mode, whereas when operated in the display mode, the light emitted from the light emitting means will be diffused and result in uniform pixels of the display device.

Abstract: The invention provides a method of activating an electronic paint (50). An electronic-paint registration code on a coded portion (20) of an electronic paint (50) is scanned. A position of an electronic brush (30) relative to the coded portion (20) of the electronic paint (50) is determined based on the scanned electronic-paint registration code, and a predetermined image is written on the electronic paint (50) based on the position of the electronic brush (30).

Abstract: The display apparatus comprises a picture tube (CRT) with an electron gun which generates an electron beam (BB) directed towards a display screen. The electron gun comprises a first and a second electrode (CA, G1). The electron beam (EB) originates from the first electrode (CA). The voltage between the first electrode (CA) and the second electrode ( G1) controls the intensity of the electron beam (EB). A beam current (IB) flows in the first electrode (CA) in response to the electron beam (EB). A (ICA) in the first electrode (CA) is the sum of the beam current (IB) and a current (IC) flowing through a capacitance (CWN) between the first and the second electrode (CA, G1). A compensation circuit (COM) supplies a compensation current (ICO) to the first electrode (CA) to compensate for a capacitive current (IC) through a capacitance (CIN) between the first and the second electrode (CA, G1).

Abstract: A display device is provided with electron beam guiding channels (10). A channel (10) receives an electron beam (EB) and guides the beam (EB) parallel to a luminescent display screen (40). The electron beam (EB) is extractable from the channel (10), after which the beam (EB) impinges on the display screen (40). Electrode means (11, 12, 13) defining an electric potential in the channel (10) are provided for guiding and extracting the electron beam (EB). The electrode means (11, 12, 13) are arranged in such a way that in the channel (10), the electron beam (EB) is focused in a transverse direction being perpendicular to the channel (10) and parallel to the display screen (40). Thus, the electron transmission of the beam guiding channel (10) can be particularly high.