Abstract: A method for controlling and compensating aging in an LED device includes measuring a performance change in light output of the LED device. The LED device is controlled with a first compensation algorithm derived from the measured performance change, during a first period, to effect a luminance change over time in the light output of the LED device. Subsequently, a second compensation algorithm, derived from the measured performance change, and different from the first compensation algorithm, during a second period, effects a second luminance change over time in the LED device's light output. The second luminance change over time in the second period is different from the first luminance change over time in the first period. Furthermore, the first and second periods together are less than the lifetime of the LED device.

Abstract: An electroluminescent display system, comprising: a) a display composed of an array of regions, wherein the current to each of the regions is provided by a pair of power lines and wherein each region includes an array of light emitting elements for emitting light; b) a pixel driving circuit for independently controlling the current to each light-emitting element in response to an image signal, wherein the intensity of the light output by the light emitting elements is dependent upon the current provided to each light emitting element; and c) a display driver for receiving an input image signal and generating a converted image signal for driving the light emitting elements in the display, wherein the display driver analyzes the input image signal to estimate the current that would result at, at least, one point along at least one of the power lines providing current to each of the regions, if employed without further modification, based upon device architecture and material and performance characteristics of d

Abstract: An OLED display for producing a full color image, comprising a plurality of at least four different colored pixels including three different colored addressable gamut-defining pixels and a fourth addressable within-gamut pixel, each pixel having an organic light-emitting diode with first and second electrodes and one or more organic light-emitting layers provided between the electrodes; the OLED display having a selected display white point, display peak luminance, gamut-defining pixel peak luminances and within-gamut pixel peak luminance; and drive circuitry for regulating luminance of the organic light-emitting diode of each of the colored pixels wherein the sum of the gamut-defining pixel peak luminances is less than the display peak luminance.

Abstract: A method for making an OLED device, including: providing a plurality of subpixels of different colors, including at least three gamut-defining subpixels, each subpixel requiring an operating voltage which is based on the maximum current density required by that subpixel; selecting the display operating voltage to be equal to or greater than the maximum required subpixel operating voltage; and selecting the area of the subpixels to reduce the maximum required subpixel operating voltage, thereby reducing the display operating voltage so as to reduce power consumption in the device.

Abstract: A method for transforming three color-input signals (R, G, B) corresponding to three gamut-defining color primaries of a display to four color-output signals (R?, G?, B?, W) corresponding to the gamut-defining color primaries and one additional primary of the display, where the additional primary has color that varies with drive level, comprising: a) determining a relationship between drive level of the additional primary and intensities of the three gamut-defining primaries which together produce equivalent color over a range of drive levels for the additional primary; and b) employing the three color-input signals R, G, B and the relationship defined in a) to determine a value for W of the four color-output signals, and modification values to be applied to one or more of the R, G, B components of the three color-input signals to form the R?, G?, B? values of the four color-output signals.

Abstract: A method for controlling and compensating aging in an LED device includes measuring a performance change in light output of the LED device. The LED device is controlled with a first compensation algorithm derived from the measured performance change, during a first period, to effect a luminance change over time in the light output of the LED device. Subsequently, a second compensation algorithm, derived from the measured performance change, and different from the first compensation algorithm, during a second period, effects a second luminance change over time in the LED device's light output. The second luminance change over time in the second period is different from the first luminance change over time in the first period. Furthermore, the first and second periods together are less than the lifetime of the LED device.

Abstract: A method of selecting an OLED device to be manufactured based on customer requirements, including the customer providing first and second sets of requirements, providing a plurality of OLED device constructions based on the first and second sets of requirements, device architecture options, and a database including device component performance information. The method also includes providing a number of performance parameters of each of the device constructions, determining, based upon the second set of requirements, a figure of merit term comprising two or more parameters and including the importance of those parameters, and using the figure of merit term to calculate a figure of merit for the possible OLED device constructions.

Abstract: An OLED display for producing a multicolor image includes a plurality of pixels including three different colored addressable gamut-pixels and a fourth addressable within-gamut-pixel, each pixel having a separately addressable organic light-emitting diode with first and second electrodes and one or more organic light emissive layers provided between the electrodes; active matrix circuitry including a separate power transistor for at least two of the three different colored addressable gamut-pixels for regulating current between a first and second voltage source through the organic light-emitting diode of the colored addressable gamut-pixel; and the active matrix circuitry including a power transistor for the fourth addressable within-gamut-pixel for regulating current between a third and fourth voltage source through the organic light-emitting diode of the fourth addressable within-gamut-pixel wherein at least three of the first, second, third, and fourth voltage sources provide different voltage levels.