Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Reexamination Certificate
2006-03-07
2006-03-07
Nguyen, Linh M. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
C327S296000
Reexamination Certificate
active
07009440
ABSTRACT:
The objective of this invention is to provide a pulse signal generator with a simple constitution that can reduce the number of signals required for setting the pulse width, as well as a display device using said pulse signal generator. Pulse assignment signal DP0input to the initial stage of pulse signal generating units PG(i,0)–PG(i,39) connected in cascade is sequentially transferred towards the last stage of the cascade connection. After transfer of the pulse assignment signal to the pulse signal generating unit in each stage, the count value of said pulse signal generating unit is initialized. Then, the pulses of pulse strings PS0–PS39in the various pulse signal generating units are counted. The count value of the pulse string is compared to the pulse assignment signal in the comparison unit of each pulse signal generating unit, and, in accordance with the comparison result, the level of the drive pulse signal of the LED is inverted. The pulse intervals (pulse timing) of pulse strings PS0–PS39are controlled individually by control unit1so that the drive pulse signal output from the pulse signal generating unit has the desired pulse width.
REFERENCES:
patent: 5164704 (1992-11-01), Steen et al.
Nakamura Hiroko
Nogawa Masashi
Tateishi Tetsuo
Brady III W. James
Kempler William B.
Nguyen Linh M.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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