Light-emitting device and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorTatsuya Suzuki
Life of this patent
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Abstract
A plurality of groups are arranged in a light emitting device. Each of the groups includes a plurality of light-emitting elements, a plurality of transistors arranged corresponding to the plurality of light-emitting elements and configured to supply current to the plurality of light-emitting elements, and a group control transistor configured to control current flowing through the plurality of transistors. The plurality of groups have a first group and a second group. The first group has a plurality of light-emitting elements. The second group has a plurality of light-emitting elements. A light-emitting element of the second group is arranged between one light-emitting element of the first group and the other light-emitting element of the first group.
Claims10
A light-emitting device in which a plurality of groups are arranged, each of the groups comprising:
- a plurality of light-emitting elements;
- a plurality of transistors arranged corresponding to the plurality of light-emitting elements, respectively and configured to supply current to the plurality of light-emitting elements, respectively;
- and
- a group control transistor configured to control current flowing through the plurality of transistors, wherein
- the plurality of groups comprise a first group and a second group,
- the first group comprises a first group control transistor, a plurality of transistors of the first group through which a first current amount flowing through the first group control transistor flows, and a plurality of light-emitting elements,
- the second group comprises a second group control transistor, a plurality of transistors of the second group through which a second current amount flowing through the second group control transistor flows, and a plurality of light-emitting elements, and
- a light-emitting element of the second group is arranged between one light-emitting element of the first group and the other light-emitting element of the first group.
A light-emitting device comprising:
- a plurality of groups each comprising a plurality of light-emitting elements and a group control transistor connected to the plurality of light-emitting elements;
- and
- a plurality of main control transistors arranged corresponding to the plurality of groups, respectively, wherein
- the plurality of groups comprise a first group and a second group,
- a first current amount flowing through a main control transistor arranged corresponding to the first group flows through a group control transistor of the first group, and a second current amount flowing through a main control transistor arranged corresponding to the second group flows through a group control transistor of the second group, and
- a light-emitting element of the second group is arranged between one light-emitting element of the first group and the other light-emitting element of the first group.
Dependencies are inferred from the claim text.