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US 2011/0234741 A1Published application
Driving circuit, driving device and image forming device
AssigneeOki Data Corporation
InventorAkira NAGUMO
Life of this patent
Estimating the term…
Abstract
Each of a plurality of gate driving parts outputs a first potential (2 V) during a period in which the gates of a plurality of thyristors belonging to the corresponding set are driven (S1N=Low) and outputs a second potential (5 V) that is higher than the first potential at a rising part of the anode driving voltage during a period in which the gates of a plurality of thyristors belonging to the corresponding set are not driven (S1N=High). Each of a plurality of gate driving parts outputs a third potential (3 V) that is lower than the second potential at periods other than the rising part of the anode driving voltage during a period in which the gates of a plurality of thyristors belonging to the corresponding set are not driven (S1N=High).
Claims19
A driving circuit, comprising:
- driven elements that form an array;
- and
- a driving element array that drives the driven elements, wherein
- the driven elements are 3-terminal switching elements that include first, second and third terminals and control current passage between the first and second terminals by one of voltage applied to the third terminal and electric current flowing to the third terminal,
- the 3-terminal switching elements form a plurality of groups each being configured by a plurality of 3-terminal switching elements that are adjacently positioned,
- the first terminals belonging to a same group of the 3-terminal switching elements are connected to each other,
- a plurality of sets of the 3-terminal switching elements are respectively formed by corresponding ones of the 3-terminal switching elements belonging to different groups, and the third terminals of the 3-terminal switching elements belonging to a same set are connected to one of a plurality of common busses respectively provided for the plurality of sets via a respective electric connection unit,
- the second terminals of the 3-switching elements are connected to ground,
- the driving element array includes a plurality of first driving parts that are respectively provided to the plurality of groups and a plurality of second driving parts that are respectively provided to the plurality of sets,
- each of the plurality of the first driving parts drives the respective first terminals of the 3-terminal switching elements belonging to a corresponding group at a first timing different from first timings for the other first driving parts,
- each of the plurality of the second driving parts drives the respective third terminals of the 3-terminal switching elements of a corresponding set via a corresponding common bus and the corresponding electric connection unit, at a second timing different from second timings for the other second driving parts, and
- each of the plurality of second driving parts outputs:
- a first potential during a period to drive the respective third terminals of the 3-terminal switching elements belonging to the corresponding set,
- a second potential that is different from the first potential, at a beginning of the first timings at which the first terminals of the 3-terminal switching elements belonging to the corresponding group are driven by the respective first driving parts, when the respective third terminals of the 3-terminal switching elements belonging to the corresponding sets are not driven, and
- a third potential that is different from the first and second potentials, after the beginning of the first timings at which the first terminals of the 3-terminal switching elements belonging to the corresponding group are driven by the respective first driving parts, when the respective third terminals of the 3-terminal switching elements belonging to the corresponding sets are not driven.
12 more elements
A driving circuit, comprising:
- a plurality of 3-terminal switching elements that form an array, the 3-terminal switching elements each including first, second and third terminals, the first terminal being connected to a signal line, the second terminal being connected to ground, the third terminal being connected to a common bus, a plurality of groups of the 3-terminal switching elements being formed by adjacent ones of the 3-terminal switching elements, a plurality of sets of the 3-terminal switching elements being formed by corresponding ones of the 3-terminal switching elements in different groups;
- a plurality of signal lines that respectively connect the first terminals of each of the plurality of groups of the 3-terminal switching elements;
- a plurality of common buses are that respectively connected to the third terminals of the 3-terminal switching elements of each of the plurality of sets;
- and
- a driving element array that drives the 3-terminal switching elements, the driving element array including a plurality of first driving parts respectively provided to the plurality of groups, and a plurality of second driving parts respectively provided to the plurality of sets, the first driving parts driving the respective first terminals of the 3-terminal switching elements of the groups at first timings, and the second driving parts driving the respective third terminals of the 3-terminal switching elements of the respective set via the corresponding common bus, at second timings, the first timings of the first driving elements being different from each other, the second timings of the second driving elements being different from each other,
- wherein each of the plurality of second driving parts outputs:
- a first potential in a period to drive the third terminals of the 3-terminal switching elements of the corresponding set,
- a second potential that is different from the first potential, at a beginning of the first timings at which the first terminals are driven by the first driving parts, when the respective third terminals of the 3-terminal switching elements of the corresponding set are not driven, and
- a third potential that is different from the first and second potentials, after the beginning of the first timings at which the first terminals are driven by the first driving parts, when the respective third terminals of the 3-terminal switching elements of the corresponding sets are not driven.
6 more elements
Dependencies are inferred from the claim text.