Shift register and image display device

Details Shift register and image display device Shift register and image display device

2007-05-01

2007-05-01

Chow, Dennis-Doon (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S100000

Reexamination Certificate

active

10800352

ABSTRACT:
In a shift register provided with flip-flops that operate in synchronism with a clock signal, and a switching means, which is opened and closed in response to an output of the preceding stage of each of the flip-flops, is installed. The clock signal is selectively inputted by the switching means, and the selected clock signal is inverted and used as a shift register output from each of the stages. Moreover, two kinds of clock signals, each of which has a duty ratio of not more than 50% and which have no overlapped portions in their low-level periods, are used so as to prevent the outputs of the shift-register from overlapping each other. Thus, it is possible to provide a shift register which is preferably used for a driving circuit of an image display device, can miniaturize the driving circuit, and can desirably change the pulse width of the output signal, and also to provide an image display device using such a shift register.

REFERENCES:
patent: 5128974 (1992-07-01), Maekawa
patent: 5400050 (1995-03-01), Matsumoto et al.
patent: 6140159 (2000-10-01), Moon
patent: 6670944 (2003-12-01), Ishii
patent: 0 461 928 (1991-12-01), None
patent: 0 730 258 (1996-09-01), None
patent: 0 760 508 (1997-03-01), None
patent: 0 789 345 (1997-08-01), None
patent: 0 869 472 (1998-10-01), None
patent: 0 903 722 (1999-03-01), None
patent: 02-054621 (1990-02-01), None
patent: 03-147598 (1991-06-01), None
patent: 09-153296 (1997-06-01), None
patent: 10-334685 (1998-12-01), None
patent: 2861951 (1998-12-01), None
patent: 11-272226 (1999-10-01), None
“Dual D-Type Positive Edge-Triggered Flip-Flops with Preset and Clear” (SN7474 data sheet), 1988, Texas Instruments Inc., p. 1.
Notice for Reasons for Refusal from Japanese Office Action pertaining to 2000-117073 (and English Translation).
Notice for Reasons for Refusal from Japanese Office Action pertaining to 11 311191 (and English Translation).
European Search Report dated Jul. 30, 2001 for European Patent Application No. EP 00 30 9617.

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