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US 10,311,792 B2Granted
Expanded gamut electroluminescent displays and methods
AssigneeLandmark Screens, LLC
InventorPaul O. Scheibe
Life of this patent
Estimating the term…
Abstract
In a display system having pixels made up of electroluminescent devices (ELDs) of three or more basis colors, a control circuit receives for each pixel a specification of a desired color to be displayed on the pixel, and determines a required driving voltage or electrical current for ELDs of each basis color, the required driving voltage or electrical current being determined from values of driving voltages or electrical currents associated with predetermined colors within the spectral locus or the purple line of human vision.
Claims24
A display system, comprising:
- a plurality of pixels each including a plurality of electroluminescent devices (ELDs) of three or more basis colors, the basis colors defining a gamut bounded by the spectral locus and the purple line of human vision, wherein the ELDs of each basis color of each pixel, when driven by a voltage or an electrical current, emit light at a luminosity intensity that corresponds to the driving voltage or electrical current;
- and
- a control circuit that, for each of the pixels, (i) receives a specification of a specified color to be displayed on the pixel, and (ii) determines for the ELDs of each basis color a required driving voltage or electrical current in a corresponding driver for the ELDs of the pixel to display the specified color, each required driving voltage or electrical current being determined from corresponding values of driving voltages or electrical currents associated with predetermined colors within the gamut and a predetermined dynamic range in luminous intensity, subject to constraints on one or more physical characteristics of the ELDs, the constraints limiting, at different times, different groups of the physical characteristics,
- wherein the physical characteristics of the ELDs relate to (i) thermal dissipation in the ELD drivers;
- (ii) luminous intensity dynamic range shaping;
- (iii) smoothness in electrical responses due to control vector transitions;
- and (iv) output ranges of driver circuits.
4 more elements
A method carried out in a display system, comprising:
- providing a plurality of pixels in the display system each including a plurality of electroluminescent devices (ELDs) of three or more basis colors, the basis colors defining a gamut within the spectral locus and the purple line of human vision, wherein the ELDs of each basis color of each pixel, when driven by a voltage or an electrical current, emit light at a luminosity intensity that corresponds to the driving voltage or electrical current;
- and
- for each of the pixels,
- (i) receiving into a control circuit of the display system, a specification of a specified color to be displayed on the pixel;
- and
- (ii) for the ELDs of each basis color, determining in the control circuit a required driving voltage or electrical current in a corresponding driver for the ELDs of the pixel to display the specified color, the required driving voltage or electrical current being determined from corresponding values of driving voltages or electrical currents associated with predetermined colors within the gamut and a predetermined dynamic range in luminous intensity, subject to constraints on one or more physical characteristics of the ELDs, the constraints limiting, at different times, different groups of the physical characteristics,
- wherein the physical characteristics of the ELDs relate to (i) thermal dissipation in the ELD drivers;
- (ii) luminous intensity dynamic range shaping;
- (iii) smoothness in electrical responses due to control vector transitions;
- and (iv) output ranges of driver circuits.
7 more elements
Dependencies are inferred from the claim text.