Led Display System
First Claim
1. A signal processor (SC) for converting a sample of an input signal (IV) into a selected combination (DCi) of drive values for at least four LED'"'"'s (PLi) of a pixel (11) of a full color LED display to obtain a desired color of the combined light emitted by the four LED'"'"'s (PLi) substantially fitting the sample of the input signal (IV), the signal processor (SC) comprises:
- means (RD) for receiving the sample of the input signal (IV) to determine possible combinations (PDCi) of drive values for which the combined light emitted by the at least four LED'"'"'s (PLi) substantially fits the sample of the input signal (IV),means (LD) for receiving the possible combinations (PDCi) to determine degradation or lifetime indications (PLTi) for these possible combinations, andmeans (CD) for receiving the possible combinations (PDCi) and the degradation or lifetime indications (PLTi) to determine the selected combination (DCi) as the one of the possible combinations (PDCi) providing substantially the minimum overall degradation or the maximum overall lifetime for the at least four LED'"'"'s (PLi) of the pixel (11).
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Accused Products
Abstract
A method of displaying an input signal (IV) on a full color LED display is discussed wherein the display has pixels (11) comprising at least four LED'"'"'s (PLi) which respectively emit light with four primary colors. The method comprises converting (SC) the input signal (IV) into drive signals for the at least four LED'"'"'s (PLi). The converting (SC) comprises: (i) determining (RD) valid ranges (VRi) of at least two of the drive signals (DSi) to obtain a color of the combined light emitted which fits the input signal (IV), (ii) determining (LD) a gradation or lifetime indication (LTi) of the at least two LED'"'"'s (PLi) for associated ones of the drive signals (DSi) within the valid ranges (VRi), and (iii) determining (CD) a combination (DCi) of values of drive signals (DSi) providing substantially the minimum degradation, or the maximum lifetime, of a combination of the at least two LED'"'"'s (PLi) based on the degradation or lifetime indications (LTi).
130 Citations
9 Claims
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1. A signal processor (SC) for converting a sample of an input signal (IV) into a selected combination (DCi) of drive values for at least four LED'"'"'s (PLi) of a pixel (11) of a full color LED display to obtain a desired color of the combined light emitted by the four LED'"'"'s (PLi) substantially fitting the sample of the input signal (IV), the signal processor (SC) comprises:
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means (RD) for receiving the sample of the input signal (IV) to determine possible combinations (PDCi) of drive values for which the combined light emitted by the at least four LED'"'"'s (PLi) substantially fits the sample of the input signal (IV), means (LD) for receiving the possible combinations (PDCi) to determine degradation or lifetime indications (PLTi) for these possible combinations, and means (CD) for receiving the possible combinations (PDCi) and the degradation or lifetime indications (PLTi) to determine the selected combination (DCi) as the one of the possible combinations (PDCi) providing substantially the minimum overall degradation or the maximum overall lifetime for the at least four LED'"'"'s (PLi) of the pixel (11). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of displaying an input signal (IV) on a full color LED display having pixels (11) comprising at least four LED'"'"'s (PLi), respectively emitting light with four primary colors, the method comprises converting (SC) the input signal (IV) into drive signals for the at least four LED'"'"'s (PLi) of a same one of the pixels (11) comprising:
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determining (RD) valid ranges (VRi) of at least two of the drive signals (DSi) for obtaining a color of the combined light emitted fitting the input signal (IV), determining (LD) a gradation or lifetime indication (LTi) of the at least two LED'"'"'s (PLi) for associated ones of the drive signals (DSi) within the valid ranges (VRi), and determining (CD) a combination (DCi) of values of drive signals (DSi) providing substantially a minimum degradation, or a maximum lifetime, of a combination of the at least two LED'"'"'s (PLi) based on the degradation or lifetime indications (LTi).
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Specification