2026-09-19T02:54:19Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/368012022-01-13T07:54:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Charles G. Sodini and Vladimir Bulovic.
Lamba, Kartik S
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2007-03-12T17:55:02Z
2007-03-12T17:55:02Z
2006
2006
http://hdl.handle.net/1721.1/36801
80018510
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2006.
Includes bibliographical references (p. 55-56).
Organic LEDs (OLEDs) have the potential to be used to build large-format, thin, flexible displays. Currently, the primary drawback to their usage lies in the difficulty of producing OLEDs which emit light at a constant and predictable brightness over their lifetime. A solution has been proposed which uses organic photo-detectors and optical feedback to control the desired luminosity on a per-pixel basis. This thesis demonstrates the design and fabrication of an integrated silicon control chip and an organic pixel/imaging array, which together form a stable, usable display. The simulation, verification, and testing of this OLED display demonstrates the utility of our solution. In particular, this thesis focuses on the Loop Compensator silicon design and feedback aspects of this circuit. The results demonstrate that the Loop Compensator has the desired DC and frequency characteristics with a measured gain of 100.2 and a variable dominant pole located at digitally-selectable frequencies (using a programmable capacitor array) of 10.8 Hz, 13.5 Hz, 22.8 Hz, and 64.8 Hz, given a clock frequency of 20 kHz.
by Kartik S. Lamba.
M.Eng.
56 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
An integrated circuit for feedback control & compensation of an organic LED display
Thesis
application/pdf
false
Publication
unknown
unknown
<Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="465e004f-3212-4623-9850-7e293abdba29">
<Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type>
<Language>eng</Language>
<Title>An integrated circuit for feedback control & compensation of an organic LED display</Title>
<PublishedIn>
<Publication>
</Publication>
</PublishedIn>
<PublicationDate>2006</PublicationDate>
<Authors>
<Author>
<DisplayName>Lamba, Kartik S</DisplayName>
<Affiliation>
<OrgUnit>
</OrgUnit>
</Affiliation>
</Author>
</Authors>
<Editors>
</Editors>
<Publishers>
<Publisher>
<DisplayName>Massachusetts Institute of Technology</DisplayName>
<OrgUnit />
</Publisher>
</Publishers>
<License>http://dspace.mit.edu/handle/1721.1/7582</License>
<Keyword>Electrical Engineering and Computer Science.</Keyword>
<Abstract>Organic LEDs (OLEDs) have the potential to be used to build large-format, thin, flexible displays. Currently, the primary drawback to their usage lies in the difficulty of producing OLEDs which emit light at a constant and predictable brightness over their lifetime. A solution has been proposed which uses organic photo-detectors and optical feedback to control the desired luminosity on a per-pixel basis. This thesis demonstrates the design and fabrication of an integrated silicon control chip and an organic pixel/imaging array, which together form a stable, usable display. The simulation, verification, and testing of this OLED display demonstrates the utility of our solution. In particular, this thesis focuses on the Loop Compensator silicon design and feedback aspects of this circuit. The results demonstrate that the Loop Compensator has the desired DC and frequency characteristics with a measured gain of 100.2 and a variable dominant pole located at digitally-selectable frequencies (using a programmable capacitor array) of 10.8 Hz, 13.5 Hz, 22.8 Hz, and 64.8 Hz, given a clock frequency of 20 kHz.</Abstract>
<Access xmlns="http://purl.org/coar/access_right"
>
</Access>
</Publication>