公开(公告)号：US20030147660A1

公开(公告)日：2003-08-07

申请号：US10200972

申请日：2002-07-24

申请人： Samsung Electronics Co., Ltd

发明人： Woo-jung Shim ,  Seung-deog An

IPC分类号： G03G015/00 ,  G03G015/02 ,  G03G015/06

CPC分类号： G03G15/5041 ,  G03G2215/017

摘要： A method of compensating for image quality controls a tone reproduction curve (TRC). The toner reproduction curve TRC null(k) measured by a color toner density sensor is compared with a target TRC nullR to obtain a deviation nullnull. A variation nullVB of a developer bias VB is calculated from a Jacobian matrix (JB) of a measured developer bias VB to calculate a new developer bias VBN and determining a measured grid voltage VG as a new grid voltage VGN if the deviation (nullnull) is greater than a tolerance nullnullT. A backplating vector VBP is obtained from the grid voltage VGN and the developer bias VBN. The backplating vector VBP is compared with a critical value VT to set control parameters VGN and VBN and control the TRC null. Thus, noise effects on the image quality are minimized to provide an output image closest to an input image quality so as to improve the image quality.

摘要翻译： 补偿图像质量的方法控制色调再现曲线（TRC）。 将由彩色调色剂浓度传感器测量的调色剂再现曲线TRC phi（k）与目标TRC phiR进行比较以获得偏差DELTAphi。 根据测量的显影剂偏压VB的雅可比矩阵（JB）计算显影剂偏压VB的变化量DELTAVB，以计算新的显影剂偏压VBN，并将测量的电网电压VG确定为新的电网电压VGN，如果偏差（DELTAphi）为 大于公差DELTAphiT。 从电网电压VGN和显影剂偏压VBN获得背板矢量VBP。 将背板矢量VBP与临界值VT进行比较，设定控制参数VGN和VBN并控制TRC phi。 因此，对图像质量的噪声影响被最小化以提供最接近输入图像质量的输出图像，以便提高图像质量。

公开(公告)号：US20030219267A1

公开(公告)日：2003-11-27

申请号：US10354181

申请日：2003-01-30

申请人： Samsung Electronics Co., Ltd.

发明人： Woo-jung Shim ,  Seung-deog An ,  Min-seon Kim

IPC分类号： G03G015/02

CPC分类号： G03G15/0266

摘要： A method of controlling a charging potential of an organic photoconductive cell (OPC) includes a first operation of applying two charging voltages Vc1 and Vc2 having respective duties D1 and D2 established in an engine controller unit (ECU) to a conductive roller via a high voltage power supply (HVPS) to charge the OPC, a second operation of measuring sensing voltages Vs1 and Vs2 through a sensing resistor Rs coupled to the conductive roller so that the ECU establishes a target charging current It and calculates a new charging voltage Vc3 and a new duty D3, a third operation of applying the new charging voltage Vc3 and the new duty D3 to the conductive roller via the HVPS to charge the OPC and measuring a charging current Ic3 of the conductive roller, and a fourth operation of comparing a difference between the charging current Ic3 of the conductive roller and the target charging current It with a tolerance value TOL to control the charging potential by using the target charging current when the difference is smaller than the tolerance value TOL. The method maintains the charging potential by compensating for a residual potential of the OPC, thus improving a performance of a printer.

摘要翻译： 控制有机光电导元件（OPC）的充电电位的方法包括：将在发动机控制器单元（ECU）中建立的具有各自的占空比D1和D2的两个充电电压Vc1和Vc2经由高电压施加到导电辊的第一操作 用于对OPC充电的电源（HVPS），通过耦合到导电辊的感测电阻器Rs测量感测电压Vs1和Vs2的第二操作，使得ECU建立目标充电电流It并计算新的充电电压Vc3和新的 负载D3，经由HVPS将新的充电电压Vc3和新的负载D3施加到导电辊的第三操作，以对OPC充电并测量导电辊的充电电流Ic3，以及第四操作， 导电辊的充电电流Ic3和目标充电电流It具有公差值TOL，以通过使用目标充电电弧来控制充电电位 当差值小于公差值TOL时。 该方法通过补偿OPC的残留电位来维持充电电位，从而提高打印机的性能。