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US 2026/0064032 A1Published application
Image forming apparatus with top emission light emitting device
AssigneeCanon Kabushiki Kaisha
InventorsYasutomo Furuta, Hayato Koyama, Koichiro Nakanishi
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Abstract
A second electrode is laminated on a light emitting layer on an opposite side across the light emitting layer from a first electrode laminated on a silicon substrate. The second electrode is capable of transmitting light. A photoconductor drum is exposed to light by using light transmitted through the second electrode.
Claims18
An image forming apparatus comprising:
- a photoconductor configured to be driven to rotate about a rotational axis;
- and
- an exposure head that includes a light emitting device, and a lens array configured to guide light emitted from the light emitting device to a photoconductor surface, wherein
- the light emitting device includes
- a silicon substrate that includes a drive circuit configured to drive the light emitting device,
- a first electrode layer that includes a plurality of electrodes arranged in a two-dimensional array in a rotation direction of the photoconductor and in a direction substantially parallel to the rotational axis and separately formed on the silicon substrate,
- a light emitting layer formed in a layer on the first electrode layer and configured to produce light when a voltage is applied, and
- a second electrode layer provided in common for the plurality of electrodes of the first electrode layer on an opposite side across the light emitting layer from a side on which the silicon substrate and the first electrode layer are disposed and configured to be capable of transmitting light,
- the drive circuit is configured to control a voltage of each of the electrodes included in the first electrode layer in accordance with image data such that the light emitting layer produces light, and
- the lens array is disposed between the second electrode layer and the photoconductor surface such that light transmitted through the second electrode layer is guided onto the photoconductor.
7 more elements
An image forming apparatus comprising:
- a photoconductor configured to be driven to rotate about a rotational axis;
- and
- an exposure head that includes a light emitting device, and a lens array configured to guide light emitted from the light emitting device to a photoconductor surface, wherein
- the light emitting device includes
- a silicon substrate that includes a drive circuit configured to drive the light emitting device,
- a first electrode layer that includes a plurality of electrodes arranged in a direction substantially parallel to the rotational axis and separately formed on the silicon substrate,
- a light emitting layer formed in a layer on the first electrode layer and configured to produce light when a voltage is applied, and
- a second electrode layer provided in common for the plurality of electrodes of the first electrode layer on an opposite side across the light emitting layer from a side on which the silicon substrate and the first electrode layer are disposed and configured to be capable of transmitting light,
- the drive circuit is configured to control a potential of each of the electrodes included in the first electrode layer in accordance with image data such that the light emitting layer produces light, and
- the lens array is disposed between the second electrode layer and the photoconductor surface such that light transmitted through the second electrode layer is guided onto the photoconductor.
7 more elements
Dependencies are inferred from the claim text.