Printer
AssigneeSeiko Epson Corporation
InventorsTatsuya Shimoda, Takao Nishikawa
Life of this patent
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Abstract
Primary scanning or other operation is not required by the light source of an internal exposure method, significantly improving the positioning of each color. An EL pixel array 134 is affixed as internal light source 124 to the entire surface of a photoconductive drum 114, and pixels controllable by TFT layer 144 are allocated to the entire image formation area of the photoconductive drum 114. Unlike with a conventional internal light source using an LED, a mechanism for moving in a primary scanning direction is therefore not needed and elements whereby the position of each color image shift are completely eliminated. As a result, there is absolutely no color shifting in full color images, and high quality images can be obtained.
Claims2
A printer comprising:
- a latent image light source comprising an EL pixel array, the EL pixel array comprising:
- at least one light emitting layer;
- an electrode layer opposed to one side of the light emitting layer;
- a TFT layer comprising a circuit part for controlling light emission from the light emitting layer by providing the light emitting layer with a current, and a plurality of pixel parts opposed to the other side of the light emitting layer and segmenting the light emitting layer into segment areas, the circuit part controlling light emission from the light emitting layer by providing current to each segment area of the light emitting layer independently;
- a photoconductive drum;
- and
- the EL pixel array being disposed substantially completely around the outside of the photoconductive drum.
Dependencies are inferred from the claim text.