Organic electroluminescent device and fabrication methods...

Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor... – Field effect device in non-single crystal – or...

Reexamination Certificate

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C257S040000, C257S059000, C257S079000

Reexamination Certificate

active

07397065

ABSTRACT:
The invention discloses an organic electroluminescent device comprising a pixel element. The pixel element comprises a substrate comprising a control area and a sensitive area, a switch device and a driving device overlying the control area, a photo diode serving as a photo sensor overlying the sensitive area, an OLED element disposed in the sensitive area and illuminating to the photo sensor, and a capacitor coupled to the photo sensor and the driving device. Specifically, a photo current corresponding to a brightness of the OLED element is generated by the photo diode responsive to the OLED element illuminating the photo diode such that a voltage of the capacitor is adjusted by the photo current to control the current passing through the driving device, thus changing the illumination of the OLED element. A method for fabricating the OLED is also provided.

REFERENCES:
patent: 2003/0063081 (2003-04-01), Kimura et al.
patent: 2005/0007320 (2005-01-01), Smith et al.
patent: 2006/0030084 (2006-02-01), Young
patent: 2007/0236429 (2007-10-01), Tseng et al.
patent: 0923067 (1999-06-01), None
patent: 1122792 (2001-08-01), None
patent: 1096466 (2005-05-01), None
patent: WO 2004/019123 (2004-03-01), None
“38.1: Optical Feedback for AMOLED Display Compensation Using LTPS and a-Si:H Technologies” Fish, et al., 2005, pp. 1340-1343.
“35.2: Improved Optical Feedback for AMOLED Display Differential Ageing Compensation” Fish, et al., 2004, pp. 1120-1123.
“32.1: Invited Paper: A Comparison of Pixel Circuits for Active Matrix Polymer/Organic LED Displays” Fish, et al., 2002, pp. 968-971.
“Optical Feedback in Active Matrix Polymer OLED Displays” Giraldo et al., 2003; pp. 529-530.
EPO Office Action mailed Oct. 27, 2006.

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