US 20120250046A1
United States
(19)
(12) Patent Application Publication (10) Pub. No.: US 2012/0250046 A1
LEE
(54)
(75)
(43) Pub. Date:
Oct. 4, 2012
IMAGE FORMING APPARATUS TO SAVE
TONER AND METHOD TO CONTROL THE
SAME
Publication Classi?cation
(51)
Int. Cl.
H04N 1/60
Inventor:
(52)
US. Cl. ....................................................... .. 358/19
H0 Kenn LEE, suwomsi (KR)
(73) Assignee:
(2006.01)
Samsung Electronics Co., Ltd,
(57)
SUWOII-Si (KR)
An image forming apparatus to save toner, Which can increase
(21) Appl. No.:
13/469,505
the sharpness of printed data (for example, images or charac
ters) on a printing medium While achieving toner saving, and
(22)
May 11, 2012
Filed:
a method to control the same. The image forming apparatus
includes a determinator, a storage unit, and a halftoning pro
cessor. The determinator receives a command signal to print
and then determines Whether or not the received command
Related US, Application Data
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ABSTRACT
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signal is a command signal for a toner saving mode. The
(63)
Contmuation of appl1cat1on No. 12/029,594, ?led on
Feb' 12’ 2008’ HOW Pat NO' 8,199,385
Storage unit Stores a hal?one table in which an LPI higher
than a normal LPI is set. lfthe received command signal is a
(30)
Foreign Application Priority Data
command signal for the toner saving mode, the halftoning
processor generates and outputs halftoning result by compar
ing gray level values corresponding to pixels of received input
Feb. 15, 2007
(KR) ............................... .. 2007 -16013
image data With grayscale values of the stored halftone table.
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