Abstract
A new external algorithm with sensing circuit are proposed to compensate
AMOLED display degradation. The compensation is enabled by first evaluating
degradation level of OLEDs based on the OLED anode voltages detected by a
newly-designed sensing subcircuit. According to sensed voltages, the external
algorithm selects appropriate built-in models to compensate OLED degradation
with the aim to achieve expected OLED emitted luminance. The models are established
based on prior measurements to prescribe the relations between luminance and
current
$(L-I)$
and
luminance and voltage
$(L-V)$
of each OLED. In this way of compensation, the proposed method
is able to incorporate negative effects of OLED degradation aggravation while
increasing driving current to compensate the original decay in OLED luminance.
Moreover, another algorithm along with the 4T0.5C pixel circuit as presented
in prior studies are adopted to compensate process variation in
$V_{\rm th}$
among pixels for improving
the emission uniformity of an AMOLED panel. Experiments are conducted by combining
the external algorithm with sensing circuit and the pixel circuit to validate
the performances of compensating and alleviating OLED degradation.
© 2013 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription