Appeal No. 95-1516
Application No. 07/672,497
control the amount of current individually for each pattern
detected.
We will respond to appellant’s points in order:
1. As our decision indicated at the top of page 11, we did
take the claimed “density correction circuit” into account,
identifying such as being taught by Suzuki. Clearly, encoder
43
in Suzuki is the density correction circuit since it controls
the laser beam intensity in order to prevent thickening of a
black fine line [see column 4, lines 12-19 of Suzuki]. The
encoder 43 outputs a signal S in accordance with correction
density data selected by a density selective circuit [i.e.,
nine pixel data outputs from the pixel X and adjacent pixels
A-H are supplied to the encoder-column 4, lines 12-14 of
Suzuki]. When this teaching of providing for a sharper, finer
image is taken together with the teachings of Hirane and
Zeise, for the reasons recited at pages 10-11 of our decision,
the artisan would clearly have arrived at the claimed subject
matter.
It is true that Suzuki does not show the corrected
picture signal data being input to a shift register in the LED
head, as claimed. However, Suzuki is employed to show the
obviousness of using a line memory, a density selective
3
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Last modified: November 3, 2007