US Patent No. 10,321,534
COLOR ERROR CORRECTED SEGMENTED LED ARRAY
| Patent No. | 10,321,534 |
|---|---|
| Issue Date | June 11, 2019 |
| Title | Color Error Corrected Segmented Led Array |
| Inventorship | Nicola Bettina Pfeffer, Eindhoven (NL) Arjen Gerben Van Der Sijde, Eindhoven (NL) Brendan Moran, San Jose, CA (US) |
| Assignee | LUMILEDS LLC, San Jose, CA (US) |
Claim of US Patent No. 10,321,534
1. A method of color error correction for a segmented LED array, the method comprising:(a) calculating a target luminance for LED segments in a segmented LED array based on an initial luminance pattern;
(b) determining a luminance ratio based on the target luminance, the luminance ratio defined as a ratio of a primary luminance value of the primary LED segment to a secondary luminance value of the at least one adjacent LED segment;
(c) comparing the luminance ratio to a predefined threshold ratio, and
(i) if the luminance ratio is greater than or equal to the predefined ratio, then the secondary luminance value of the at least one adjacent LED segment is maintained, or
(ii) if the luminance ratio is less than the predefined ratio, then the secondary luminance value of the at least one adjacent LED segment is increased.
(b) determining a luminance ratio based on the target luminance, the luminance ratio defined as a ratio of a primary luminance value of the primary LED segment to a secondary luminance value of the at least one adjacent LED segment;
(c) comparing the luminance ratio to a predefined threshold ratio, and
(i) if the luminance ratio is greater than or equal to the predefined ratio, then the secondary luminance value of the at least one adjacent LED segment is maintained, or
(ii) if the luminance ratio is less than the predefined ratio, then the secondary luminance value of the at least one adjacent LED segment is increased.