Abstract: A pixel structure is provided comprising a plurality of sub-pixels, each sub-pixel comprising at least two sub-sub-pixels, each sub-sub-pixel being for the emission of light of one of at least two colors, the sub-sub-pixels being uniformly arranged within the sub-pixel, each sub-pixel of one pixel comprising the same arrangement of sub-sub-pixels. Furthermore, a reflective display comprising pixels with the pixel structure of the invention is provided, having an high image quality.

Abstract: A calibration method for calibrating a fixed format emissive display device having a plurality of pixels is described In the display each pixel comprises at least three sub-pixels for emitting light of different real primary colours. The method comprises determining, for each real primary colour separately, a virtual target primary colour which can be reached by at least 80% of the pixels of the display, determining a colour gamut defined by the determined virtual target primary colours, and adjusting the drive currents to the sub-pixels to achieve a colour inside the determined colour gamut. A display having an extended range of colours is described, i.e. a gamut of colours that is more than the gamut provided by an n virtual primary colour based electronic multicolour display, as measured on a chromaticity diagram, for example. A color and/or brightness uniform image can be produced with this fixed format emissive display device.

Abstract: The present invention provides a multicolor OLED pixel structure having a plurality of light emitting color elements, each color element emitting light of a particular color. Optical centers of the color elements coincide substantially at an optical center for the pixel structure and any portion of a color element of the pixel structure has an equally luminous portion of the same color element located diametrically opposite thereto with respect to the optical center of the pixel structure. Light from all the color elements adds to be able to form emitted white light. A plurality of pixel structures may be formed into an array for an active or passive display.

Abstract: A method of optimizing lifetime of an OLED display element and an OLED display element with optimized lifetime for possible use in a tiled display, while maintaining light output are described. It compensates an OLED operating parameter such as supply voltage and/or on-time of the operating current based on at least one environmental factor which affects aging and on at least one operating factor which is indicative of aging, e.g. by determining the brightness of an OLED display element. To optimize the light output, pre-charge of the aged OLED display elements can be optimized. The knowledge of the working temperature of OLED tiles may be used to regulate the cooling and thus the working temperature, thus improving the lifetime of the display. Furthermore the intensity and contrast of the display illumination may be set within predefined limits to reduce the aging.

Abstract: A method of designing a fixed format emissive display is described using a computing device having a processor and a memory, the display comprising an array of emissive pixel elements, each pixel element comprising at least two sub-pixel elements made of different materials. The method comprises selecting areas of the at least two sub-pixel elements so that each pixel element displays white at a predetermined white point within a certain tolerance over a lifetime of the pixel, and such that the lifetimes of the sub-pixel areas are within a predetermined tolerance of each other. A display having sub-pixel elements optimized so that each pixel element displays white at a predetermined white point within a certain tolerance over a lifetime of the pixel, and such that the lifetimes of the sub-pixel areas are within a predetermined tolerance of each other is also described.

Abstract: A pixel module for use in a large-area display has a cluster of sequentially interconnected similar pixel modules that are driven by a central controller. The module includes pixel elements that have a serial video data bus input, and command input lines that are electrically connected to inputs of a latch. The latch has parallel inputs and outputs which are clocked with a data dock input. Also included are a current driver device for driving the pixels, a first inverter for driving the data clock input, an address input connected to a second inverter, an EEPROM connected to the input port, and a power supply.

Abstract: A display pixel module for use in a configurable large-screen display application, with an array of pixels (122) mounted at the front (200) of the module (120) and provided with input and output connectors (206–207), characterized in that at least some of the side walls (202) and of the upper and lower walls (203–204) are tapered inwardly, enclosing an angle (A) with the front (200) and in that it is provided with mounting means to fix the module on a mounting surface of a display.

Abstract: A pixel structure is provided comprising a plurality of sub-pixels, each sub-pixel comprising at least two sub-sub-pixels, each sub-sub-pixel being for the emission of light of one of at least two colors, the sub-sub-pixels being uniformly arranged within the sub-pixel, each sub-pixel of one pixel comprising the same arrangement of sub-sub-pixels. Furthermore, a reflective display comprising pixels with the pixel structure of the invention is provided, having an high image quality.

Abstract: A calibration method for calibrating a fixed format emissive display device having a plurality of pixels is described In the display each pixel comprises at least three sub-pixels for emitting light of different real primary colours. The method comprises determining, for each real primary colour separately, a virtual target primary colour which can be reached by at least 80% of the pixels of the display, determining a colour gamut defined by the determined virtual target primary colours, and adjusting the drive currents to the sub-pixels to achieve a colour inside the determined colour gamut. A display having an extended range of colours is described, i.e. a gamut of colours that is more than the gamut provided by an n virtual primary colour based electronic multicolour display, as measured on a chromaticity diagram, for example. A color and/or brightness uniform image can be produced with this fixed format emissive display device.

Abstract: The present invention relates to a configurable emissive display tile, e.g. an organic light-emitting diode (OLED) display tile and associated methods for use in a tiled large-screen display application. The OLED tile assembly of the present invention is capable of operating either as an autonomous display or, alternatively, may operate within a set of OLED display tiles forming a larger tiled display. An embodiment of an OLED tile assembly (100) according to an embodiment of the present invention is shown in FIG. 1C, including a power supply (158), a cooling system with cooling fans (160) and cooling blocks (146) and a control system, comprising a control board (154) with processor, an OLED board (142) and a substrate (140).

Abstract: The present invention relates to a method of controlling a modular, tiled, large-screen emissive display application, e.g. an OLED display application. The method of controlling e.g. includes a first control level (214) for controlling the emissive devices, a second control level (212) for controlling the emissive display modules and a third control level for controlling the emissive display tiles (210). The number of control levels can be larger or it can be restricted to two levels. The method of controlling according to the present invention allows for similar control and calibration algorithms to be run at all levels, and allows for distributed processing in order to reduce bandwidth requirements and processing complexity. Furthermore, the control method of the present invention includes a method of operating and a method of monitoring a modular, tiled, large-screen emissive display.

Abstract: A display pixel module for use in a configurable large-screen display application, with an array of pixels (122) mounted at the front (200) of the module (120) and provided with input and output connectors (206-207), characterized in that at least some of the side walls (202) and of the upper and lower walls (203-204) are tapered inwardly, enclosing an angle (A) with the front (200) and in that it is provided with mounting means to fix the module on a mounting surface of a display.

Abstract: Configurable large-area display system with a display (114) comprising a plurality of sub-displays that each contain an array of pixels (122), characterized in that it further comprises a central controller hardware and software block (110) containing software to control the display system (100) and to generate control data and video signals to be displayed on the display (114); a digitizer (112) that converts said control data and video signals to a digital signal compatible with the display (114); whereby the digitized control data and video signals are passed from one sub-display to the next, and whereby each sub-display is a control unit (116) capable of controlling the individual pixels (122) of said control unit (116) as a function of its position within the display (114) and of the received control data and video signals.

Abstract: A pixel module for use in a large-area display, in particular as part of a cluster (118) of a plurality of sequentially interconnected similar pixel modules (120) and driven by a central controller (116), comprising one or more pixel elements (122), characterized in that it further comprises a serial video data bus input (SERIAL IN) and one or more command input lines (CMD's In) electrically connected to inputs of a latch (210) having parallel inputs and outputs and which is clocked with a data clock input (DATA CLK); a current driver device for driving said one or more pixels (122) which is electrically connected to the outputs of latch (210) and to the data clock input (DATA CLK) and which includes a serial output port (SERIAL OUT) for transmitting the serial data to the next pixel module (120) in sequence; a first inverter (214), the output of which (DATA CLK “not”) can be used to drive the data clock input (DATA CLK) of the next pixel module (120) in sequence; a grayscale clock (GS CLK) input which is ele

Abstract: A method of optimizing lifetime of an OLED display element and an OLED display element with optimized lifetime for possible use in a tiled display, while maintaining light output are described. It compensates an OLED operating parameter such as supply voltage and/or on-time of the operating current based on at least one environmental factor which affects aging and on at least one operating factor which is indicative of aging, e.g. by determining the brightness of an OLED display element. To optimize the light output, pre-charge of the aged OLED display elements can be optimized. The knowledge of the working temperature of OLED tiles may be used to regulate the cooling and thus the working temperature, thus improving the lifetime of the display. Furthermore the intensity and contrast of the display illumination may be set within predefined limits to reduce the aging.

Abstract: A method of designing a fixed format emissive display is described using a computing device having a processor and a memory, the display comprising an array of emissive pixel elements, each pixel element comprising at least two sub-pixel elements made of different materials. The method comprises selecting areas of the at least two sub-pixel elements so that each pixel element displays white at a predetermined white point within a certain tolerance over a lifetime of the pixel, and such that the lifetimes of the sub-pixel areas are within a predetermined tolerance of each other.

Abstract: The present invention provides a multicolor OLED pixel structure having a plurality of light emitting color elements, each color element emitting light of a particular color. Optical centers of the color elements coincide substantially at an optical center for the pixel structure and any portion of a color element of the pixel structure has an equally luminous portion of the same color element located diametrically opposite thereto with respect to the optical center of the pixel structure. Light from all the color elements adds to be able to form emitted white light. A plurality of pixel structures may be formed into an array for an active or passive display.