Patent ID: 8247959
Filing Date: 2012-08-21
Classification: F21K,H01L

Abstract:
1. An illumination system which, when energized, exhibits a correlated color temperature (CCT) in the range of between about 2000 K and about 20000 K, the system comprising: one or more organic electroluminescent element; wherein said system is configured to provide a total light that appears white when energized, said total light having delta chroma values for each of the fifteen color samples of the color quality scale (CQS) that are preselected to provide enhanced color contrast relative to an incandescent or blackbody light source, in accordance with the following: (A) for a system having a CCT in the range of between about 2000 K and about 3000 K, the delta chroma values are as follows: at least two color samples of the CQS are within the parameters −2 to 7 for VS1; −3 to 7 for VS2; −7 to 7 for VS3; at least one color sample of the CQS is within the parameters −2 to 8 for VS4; −2 to 15 for VS5; at least two color samples of the CQS are within the parameters 1 to 25 for VS6; 4 to 26 for VS7; −1 to 15 for VS8; at least two color samples of the CQS are within the parameters −6 to 7 for VS9; −4 to 6 for VS10; −2 to 8 for VS11; at least one color sample of the CQS is within the parameters −1 to 8 for VS12; −1 to 13 for VS13; and at least one color sample of the CQS is within the parameters −7 to 13 for VS14; −9 to 12 for VS15; (B) for a system having a CCT in the range of between about 3000 K and about 4500 K, the delta chroma values are as follows: at least two color samples of the CQS are within the parameters −5 to 7 for VS1; −3 to 7 for VS2; −7 to 7 for VS3; at least one color sample of the CQS is within the parameters −3 to 8 for VS4; −2 to 15 for VS5; at least two color samples of the CQS are within the parameters 0 to 22 for VS6; 3 to 26 for VS7; −1 to 15 for VS8; at least two color samples of the CQS are within the parameters −6 to 7 for VS9; −4 to 6 for VS10; −4 to 6 for VS11; at least one color sample of the CQS is within the parameters −1 to 8 for VS12; −1 to 13 for VS13; and at least one color sample of the CQS is within the parameters −7 to 15 for VS14; −7 to 12 for VS15; (C) for a system having a CCT in the range of between about 4500 K and about 7500 K, the delta chroma values are as follows: at least two color samples of the CQS are within the parameters −5 to 7 for VS1; −3 to 7 for VS2; −5 to 7 for VS3; at least one color sample of the CQS is within the parameters −3 to 7 for VS4; −2 to 15 for VS5; at least two color samples of the CQS are within the parameters 0 to 22 for VS6; 1 to 26 for VS7; −1 to 15 for VS8; at least two color samples of the CQS are within the parameters −6 to 7 for VS9; −5 to 6 for VS10; −4 to 6 for VS11; at least one color sample of the CQS is within the parameters −2 to 8 for VS12; −1 to 16 for VS13; and at least one color sample of the CQS is within the parameters −5 to 22 for VS14; −6 to 15 for VS15, (D) for a system having a CCT in the range of between about 7500 K and about 20000 K, the delta chroma values are as follows: at least two color samples of the CQS are within the parameters −3 to 7 for VS1; −3 to 7 for VS2; −5 to 8 for VS3; at least one color sample of the CQS is within the parameters −3 to 6 for VS4; −3 to 15 for VS5; at least two color samples of the CQS are within the parameters 0 to 22 for VS6; 0 to 25 for VS7; −1 to 15 for VS8; at least two color samples of the CQS are within the parameters −5 to 7 for VS9; −5 to 6 for VS10; −4 to 6 for VS11; at least one color sample of the CQS is within the parameters −3 to 8 for VS12; −1 to 16 for VS13; and at least one color sample of the CQS is within the parameters −3 to 24 for VS14; −4 to 15 for VS15; wherein all delta chroma values are measured in the CIE LAB space.