Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-08-22
2006-08-22
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S2140AG, C348S300000, C348S307000
Reexamination Certificate
active
07095005
ABSTRACT:
In an image reading device of the present invention, the polarity of a driving voltage for a Cs electrode is reversed every reading cycle (frame). For example, the Cs electrode is driven by positively charging the capacitor in odd-numbered cycles (frames) and by negatively charging the capacitor in even-numbered cycles (frames). As a result, an image reading device is provided that does not readily change electrical characteristics of the capacitor or TFT, and therefore are reliable over extended periods of use.
REFERENCES:
patent: 5184007 (1993-02-01), Saika et al.
patent: 5912465 (1999-06-01), Kobayashi et al.
patent: 6738031 (2004-05-01), Young et al.
patent: 8055/1990 (1990-01-01), None
patent: 05243547 (1993-09-01), None
patent: 2001-0081036 (2001-08-01), None
Chinese Office Action and English translation thereof mailed Jul. 1, 2005 in corresponding Chinese application No. 200310114379.0.
WO 01/24512 dated Apr. 5, 2001 (family patent of KR2001-0081036 listed above).
Korean Office Action mailed Oct. 28, 2005 (w/English translation thereof).
Luu Thanh X.
Yam Stephen
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