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US 7,884,971 B2Granted
Multiplied pulse generation device, multiplied pulse generation method, image forming apparatus, and image reading apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorShigeki Akiyama
Life of this patent
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Abstract
In a multiplied pulse generation device, a detection signal is outputted every time a driven object is driven by a specific amount. An actual cycle indicating a time interval between the detection signal and a previous detection signal is measured. An estimated cycle is estimated based on at least past two actual cycles including the actual cycle measured. A multiplied pulse is sequentially generated in such a manner that a multiplied cycle indicating a time interval per which the multiplied pulse is generated is sequentially changed according to an amount of change from the actual cycle to the estimated cycle.
Claims19
A multiplied pulse generation device comprising:
- a detection signal output unit that outputs a detection signal every time a driven object is driven by a specific amount;
- an actual cycle measurement unit that measures an actual cycle indicating a time interval between the detection signal and a previous detection signal every time the detection signal is outputted from the detection signal output unit;
- an estimation unit that estimates an estimated cycle indicating a time interval until output of a next detection signal from the detection signal output unit based on at least past two actual cycles every time the detection signal is outputted from the detection signal output unit, the at least past two actual cycles including the actual cycle measured by the actual cycle measurement unit as a result of output of the detection signal;
- and
- a multiplied pulse generation unit that sequentially generates a multiplied pulse obtained by multiplying the detection signal outputted, by a predetermined multiplication factor, every time the detection signal is outputted from the detection signal output unit, and that sequentially generates the multiplied pulse in such a manner that a multiplied cycle indicating a time interval per which the multiplied pulse is generated is sequentially changed according to an amount of change from the actual cycle measured by the actual cycle measurement unit to the estimated cycle estimated by the estimation unit every time the detection signal is outputted from the detection signal output unit.
2 more elements
A multiplied pulse generation device comprising:
- a detection signal output unit that outputs a detection signal every time a driven object is driven by a specific amount;
- an actual cycle measurement unit that measures an actual cycle indicating a time interval between the detection signal and a previous detection signal every time the detection signal is outputted from the detection signal output unit;
- an estimation unit that estimates an estimated cycle indicating a time interval until output of a next detection signal from the detection signal output unit based on at least past two actual cycles every time the detection signal is outputted from the detection signal output unit, the at least past two actual cycles including the actual cycle measured by the actual cycle measurement unit as a result of output of the detection signal;
- and
- a multiplied pulse generation unit that sequentially generates a multiplied pulse obtained by multiplying the detection signal outputted, by a predetermined multiplication factor, every time the detection signal is outputted from the detection signal output unit, and that sequentially generates the multiplied pulse in such a manner that a multiplied cycle indicating a time interval per which the multiplied pulse is generated is gradually changed from a multiplied cycle of a last multiplied pulse generated based on the previous detection signal to a multiplied cycle of a last multiplied pulse to be generated this time, and that a sum of multiplied cycles of multiplied pulses to be generated is consistent with the estimated cycle.
2 more elements
A multiplied pulse generation method comprising the steps of:
- outputting a detection signal every time a driven object is driven by a specific amount;
- measuring an actual cycle indicating a time interval between the detection signal and a previous detection signal every time the detection signal is outputted;
- estimating an estimated cycle indicating a time interval until output of a next detection signal based on at least past two actual cycles every time the detection signal is outputted, the at least past two actual cycles including the actual cycle measured as a result of output of the detection signal;
- and
- sequentially generating a multiplied pulse obtained by multiplying the detection signal outputted, by a predetermined multiplication factor, every time the detection signal is outputted, and sequentially generating the multiplied pulse in such a manner that a multiplied cycle indicating a time interval per which the multiplied pulse is generated is sequentially changed according to an amount of change from the actual cycle measured, to the estimated cycle every time the detection signal is outputted.
2 more elements
A multiplied pulse generation method comprising the steps of:
- outputting a detection signal every time a driven object is driven by a specific amount;
- measuring an actual cycle indicating a time interval between the detection signal and a previous detection signal every time the detection signal is outputted;
- estimating an estimated cycle indicating a time interval until output of a next detection signal based on at least past two actual cycles every time the detection signal is outputted, the at least past two actual cycles including the actual cycle measured as a result of output of the detection signal;
- and
- sequentially generating a multiplied pulse obtained by multiplying the detection signal outputted, by a predetermined multiplication factor, every time the detection signal is outputted, and sequentially generating the multiplied pulse in such a manner that a multiplied cycle indicating a time interval per which the multiplied pulse is generated is gradually changed from a multiplied cycle of a last multiplied pulse generated based on the previous detection signal to a multiplied cycle of a last multiplied pulse to be generated this time, and that a sum of multiplied cycles of multiplied pulses to be generated is consistent with the estimated cycle.
2 more elements
Dependencies are inferred from the claim text.