公开(公告)号：US20120250046A1

公开(公告)日：2012-10-04

申请号：US13469505

申请日：2012-05-11

Applicant: Ho Keun LEE

Inventor： Ho Keun LEE

IPC: H04N1/60

CPC classification number: H04N1/405 ,  H04N1/4056

Abstract: An image forming apparatus to save toner, which can increase the sharpness of printed data (for example, images or characters) on a printing medium while achieving toner saving, and a method to control the same. The image forming apparatus includes a determinator, a storage unit, and a halftoning processor. The determinator receives a command signal to print and then determines whether or not the received command signal is a command signal for a toner saving mode. The storage unit stores a halftone table in which an LPI higher than a normal LPI is set. If the received command signal is a command signal for the toner saving mode, the halftoning processor generates and outputs halftoning result by comparing gray level values corresponding to pixels of received input image data with grayscale values of the stored halftone table.

Abstract translation: 一种用于节省调色剂的图像形成装置，其可以在实现调色剂节省的同时增加打印介质上的打印数据（例如，图像或字符）的清晰度，以及控制该调色剂的方法。 图像形成装置包括确定器，存储单元和半色调处理器​​。 确定器接收打印命令信号，然后确定接收到的命令信号是否是用于调色剂节省模式的命令信号。 存储单元存储其中设置了高于正常LPI的LPI的半色调表。 如果接收的命令信号是用于调色剂保存模式的命令信号，则半色调处理器​​通过将与接收到的输入图像数据的像素相对应的灰度值与存储的半色调表的灰度值进行比较来产生并输出半色调结果。

公开(公告)号：US20090033703A1

公开(公告)日：2009-02-05

申请号：US12060400

申请日：2008-04-01

Applicant: Ho Keun LEE

Inventor： Ho Keun LEE

IPC: B41J29/38

CPC classification number: B41J29/393

Abstract: An inkjet image forming apparatus and a method to control the same to correct characteristics of a plurality of print heads of the apparatus to have uniform characteristics includes a plurality of test patterns printed according to the timing of printing of dots through a row of odd nozzles and a row of even nozzles of each of the plurality of print heads and information of the drive timing corresponding to a brightest test pattern of the printed test patterns is stored. When a normal print operation is performed, a different drive timing is applied to each of the plurality of print heads based on the stored information, thereby compensating for the difference between the one or more characteristics of the print heads.

Abstract translation: 一种喷墨图像形成装置及其控制方法，用于校正装置的多个打印头的特性以具有均匀的特性，包括根据通过奇数喷嘴列打印点的定时打印的多个测试图案，以及 存储多个打印头中的每一个的一排偶数喷嘴和对应于打印的测试图案的最亮测试图案的驱动定时的信息。 当执行正常的打印操作时，基于所存储的信息将不同的驱动定时应用于多个打印头中的每一个，从而补偿打印头的一个或多个特性之间的差异。