US 11,955,072 B2
OLED-based display having pixel compensation and method
Seonki Kim, Fishkill, NY (US); Amalkumar P. Ghosh, Hopewell Junction, NY (US); Olivier Prache, Pleasantville, NY (US); and Hyuk Sang Kwon, Sunnyvale, CA (US)
Assigned to eMagin Corporation, Hopewell Junction, NY (US)
Filed by eMagin Corporation, Hopewell Junction, NY (US)
Filed on Jun. 2, 2022, as Appl. No. 17/830,912.
Claims priority of provisional application 63/209,215, filed on Jun. 10, 2021.
Prior Publication US 2022/0398959 A1, Dec. 15, 2022
Int. Cl. G09G 3/3225 (2016.01)
CPC G09G 3/3225 (2013.01) [G09G 2320/0285 (2013.01); G09G 2320/029 (2013.01); G09G 2320/045 (2013.01); G09G 2360/145 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of compensating at least one pixel for an image in a display, comprising the steps of:
(a) storing a pixel map for a display area of the display, the pixel map having a plurality of non-degraded pixels and at least one degraded pixel;
(b) projecting at least one fixed pattern on the display area;
(c) determining a number (NO) of non-degraded pixels required to turn on a sensing system, wherein the number of non-degraded pixels have a luminescence beyond a threshold luminescence sufficient to turn the sensing system on;
(d) setting a count value (i) to zero;
(e) generating a symbol S by energizing a number of degraded pixels equal to i;
(f) measuring a luminescence output of the sensing system to determine whether the sensing system is on;
(g) if the sensing system is not turned on at step (f), adding one to i, and re-generating S by energizing one additional degraded pixel;
(h) if the sensing system turns on at step (f), determining a degradation level based on NO and S;
(i) updating the pixel map based on a current value of S and the degradation level; and
(j) generating image data for forming a compensated image in the display.