US Patent No: 8,194,111
Number of patents in Portfolio can not be more than 2000
Light-emitting element head, light-emitting element chip, image forming apparatus and signal supply method
Stats
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Jun 5, 2012
Issued date -
Apr 22, 2009
filing date -
12/427,913
serial no -
In Force
status
Importance
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Abstract
The light-emitting element head is provided with: plural light-emitting element chips in each of which light-emitting elements are arrayed in a line; a lighting signal supply unit supplying lighting signals for setting whether or not the light-emitting elements emit light, each of the lighting signals being provided in common to the light-emitting element chips that belong to one of N groups into which the plural light-emitting element chips are divided, where N is an integer of 2 or more; and a clock signal supply unit supplying a first clock signal as a transfer signal for causing the light-emitting elements to sequentially emit light, and second clock signals for setting the light-emitting elements ready to emit light, the second clock signals being different from one another, being supplied to the respective light-emitting element chips belonging to the one of the N groups, and being supplied in common across the N groups.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 7,954,917 Exposure device, exposure system, light-emitting element circuit board and image forming apparatus | 2 | 2007 | |
| 8,098,271 Exposure device, light-emitting device, image forming apparatus and failure diagnosing method | 1 | 2009 | |
| 8,004,550 Light-emitting element head, image forming apparatus and signal supply method | 1 | 2009 | |
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| 2011/0164,103 Light Emitting Element Array, Light Emitting Device, and Image Forming Apparatus | 2 | 2007 | |
| 2010/0177,155 Light Emitting Element Array, Light Emitting Device, and Image Forming Apparatus | 2 | 2008 | |
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| 6,559,879 LED array head, circuit board, and LED array chip | 9 | 1999 | |
| 7,990,407 Drive circuit, light print head, and image forming apparatus | 2 | 2009 | |
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| 5,969,744 Recording head and image forming apparatus using the same | 9 | 1997 | |
Patent Citation Ranking
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