In this thesis we proposed two new pixel circuits for organic light emission display. The first one is 5T1C circuit with two control signals. It can compensate threshold voltage variation and the drop of the power supply voltage that result in OLED current non-uniformity. We have demonstrates that the pixel circuit has high immunity to the threshold voltage variation. In addition, the circuit uses low supply voltage compared with the conventional 5T1C pixel circuit, so it is a low power driver circuit. The second one employs the voltage feedback method and uses the gain value of design circuit for compensating the threshold voltage shift of the driving TFT.To the aim is to reach that to the flow through current of the driving TFT have no relationship with the threshold voltage of TFT. Thus, the OLED can emission light with retaining uniformity light in each time. Because the proposed circuit configuration has low supply voltage and low select pulse voltage, the spike wave phenomenon can be improved and eliminated while the circuit switchs on and off. Due to the circuit supply voltage is decreased, it power consumption reduce significantly and the capacitor charging time is less than 70 £gs. Thus, in this thesis, the two proposed pixel circuits are both of low voltage and low power.
The two pixel circuits designed have been fabricated by TSMC 0.35£gm 2P4M CMOS technology with 3.3v power supply. The 5TIC chip area is 1031.8 ¡Ñ 1083.7£gm2 and the measured result shows that when the select pulse is 0~10V, the input voltage is 10V, the select pulse2 is 0~8V and the Vdata¡@voltage range is 0~5V, the OLED current is correspond to 0~20.6£gA and the maximum power consumption is 17£gw. The chip area of the voltage feedback circuit is 1083.38 ¡Ñ 1149.8£gm2 and the measured result shows that when the select pulse is 0~10V, the input voltage is 10V and the feedback resistor is 50£[, the power consumption is 72£gw and the charging time is 51.7£gs.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0707108-155910 |
| Date | 07 July 2008 |
| Creators | Wen, Cheng-neng |
| Contributors | James B. Kuo, Jyi-Tsong Lin, A.K. Chu, Meng-Hsueh Chiang, Yao-Tsung Tsai |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707108-155910 |
| Rights | not_available, Copyright information available at source archive |
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