Light-emitting element array, drive controlling device, recording head, and image forming device
AssigneeOki Data Corporation
InventorAkira Nagumo
Life of this patent
Estimating the term…
Abstract
A light-emitting element array includes: a resistor connected at a first end to a driving unit; and a plurality of light-emitting elements, each of the plurality of light-emitting elements including a three-terminal switching element having a first terminal, a second terminal, and a third terminal, the first terminal in each of the plurality of light-emitting elements being connected to a second end of the resistor, the second terminal in each of the plurality of light-emitting elements being connected to ground, and the third terminal in each of the plurality of light-emitting elements being connected to a control circuit.
Claims25
A light-emitting element array, comprising:
- a plurality of light-emitting elements each including a switch element;
- a driving unit configured to drive the plurality of light-emitting elements to emit light by supplying a constant current;
- and
- a control circuit configured to control printing operations, wherein
- the switch element including
- first, second and third terminals, the first terminal being connected to the driving unit via a connecting member, the second terminal being connected to ground, and the third terminal being connected to the control circuit, and
- a resistor arranged between the first terminal and the connecting member.
A drive controlling circuit, comprising:
- a switch element included in a light-emitting element;
- a driving unit configured to provide a constant current to the light-emitting element, the driving unit being connected to the light-emitting element via a connecting member;
- a control circuit configured to control the light-emitting element to emit light;
- and
- a resistor, wherein
- the switch element includes first, second and third terminals, the first terminal being connected to the driving unit via the connecting member, the second terminal being connected to ground, and the third terminal being connected to the control circuit,
- the resistor is arranged between the first terminal and the connecting member, and the resistor being provided in the control circuit.
A recording head, comprising:
- a plurality of light-emitting elements, each of the plurality of light-emitting elements including a switch element having first, second and third terminals, each of the plurality of light-emitting elements being controlled by receiving a constant current from a driving unit connected via a connecting member;
- a control circuit configured to provide a control signal at an output terminal, and
- a resistor, wherein
- the first terminal is connected to the driving unit via the connecting member,
- the second terminal is connected to ground,
- the third terminal is connected to the output terminal of the control circuit, and
- the resistor is arranged between the first terminal and the connecting member.
An image forming device, comprising:
- a plurality of light-emitting elements, each of the plurality of light-emitting elements including a switch element, each of the plurality of light-emitting elements being controlled by receiving a constant current from a driving unit connected via a connecting member;
- and
- a resistor arranged between the plurality of light-emitting elements and the connecting member;
- wherein each switch element includes
- a first terminal connected to the driving unit via the connecting member and the resistor,
- a second terminal connected to ground, and
- a third terminal connected to a control circuit.
A printer circuit, comprising:
- an optical print head, including
- a resistor having a first end and a second end,
- a plurality of light-emitting elements, each of the plurality of light-emitting elements including a switch element having a first terminal, a second terminal, and a third terminal, and
- a control circuit;
- a printer driving unit;
- and
- a connecting cable connected between the printer driving unit and the first end of the resistor,
- wherein the first terminal in each of the plurality of light-emitting elements is connected to the second end of the resistor,
- wherein the second terminal in each of the plurality of light-emitting elements is connected to ground, and
- wherein the third terminal in each of the plurality of light-emitting elements is connected to the control circuit.
Dependencies are inferred from the claim text.