公开(公告)号：US20030086717A1

公开(公告)日：2003-05-08

申请号：US10214940

申请日：2002-08-09

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Woo-jung Shim ,  Min-Seon Kim

IPC分类号： G03G015/00

CPC分类号： G03G15/5041 ,  G03G2215/00042 ,  G03G2215/00054

摘要： A toner reproduction curve (TRC) control method is provided. The TRC method for controlling a printer including a color toner density (CTD) sensor includes the steps of (a) measuring a development potential VB, a charging potential VO, an exposure potential VR, and a development current Id and evaluating a development vector VD, which is the difference between the development potential VB and the exposure potential VR, and a backplating vector VBP, which is the difference between the charging potential VO and the exposure potential VR; (b) forming a TRC space using TRC data detected from the CTD sensor; (c) obtaining a TRC characteristic function from the TRC data, the development vector VDnullx, the backplating vector VBPnully, and the development current Idnullz; (d) forming an RTRC by setting TRC data, whose covariance is smaller than a threshold value among the detected TRC data, as RTRC data; and (e) measuring TRC data, comparing the measured TRC data with the RTRC data to calculate control parameter values, and controlling the printer using the control parameter values. The TRC method does not require other sensors but the CTD sensor. By using internal parameters covering environmental changes, the charging potential of a photosensitive body, a state of a developer, and the efficiency of a charger can be estimated, thereby realizing efficient TRC control.

摘要翻译： 提供调色剂再现曲线（TRC）控制方法。 用于控制包括彩色调色剂密度（CTD）传感器的打印机的TRC方法包括以下步骤：（a）测量显影电位VB，充电电位VO，曝光电位VR和显影电流Id，并评估显影矢量VD ，其是显影电位VB和曝光电位VR之间的差异，以及作为充电电位VO和曝光电位VR之间的差的背板矢量VBP; （b）使用从CTD传感器检测的TRC数据形成TRC空间; （c）从TRC数据获得TRC特征函数，开发向量VD = x，背板矢量VBP = y，显影电流Id = z; （d）通过将检测到的TRC数据中的协方差小于阈值的TRC数据设置为RTRC数据来形成RTRC; 和（e）测量TRC数据，将测量的TRC数据与RTRC数据进行比较以计算控制参数值，以及使用控制参数值来控制打印机。 TRC方法不需要其他传感器，但不需要CTD传感器。 通过使用覆盖环境变化的内部参数，可以估计感光体的充电电位，显影剂的状态和充电器的效率，从而实现有效的TRC控制。

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。

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：US20030228157A1

公开(公告)日：2003-12-11

申请号：US10349038

申请日：2003-01-23

申请人： SAMSUNG ELECTRONICS CO., LTD

发明人： Seung-young Byun ,  Woo-jung Shim

IPC分类号： G03G015/00 ,  G03G015/08

CPC分类号： G03G15/5041 ,  G03G15/0851 ,  G03G15/0863 ,  G03G15/5058 ,  G03G15/556

摘要： A method of detecting toner depletion in an image forming apparatus. The method includes comparing an accumulation pixel number Qt that is obtained by accumulating and counting a number of pixels of a printed image, with a reference pixel number Qr, calculated from an amount of toner received in a developing unit, and recognizing that the image forming apparatus is in a toner low state if the accumulation pixel number Qt is larger than the reference pixel number Qr. The method further includes comparing a concentration Di of the printed image with a predetermined reference concentration Dr and detecting toner depletion in the case of the toner low state. The method further includes determining whether the developing unit is a new developing unit, if the developing unit is reinstalled in the toner depletion state.

摘要翻译： 一种检测图像形成装置中的调色剂耗尽的方法。 该方法包括比较通过累积和计数打印图像的像素数而获得的累加像素数Qt与从显影单元中接收的调色剂量计算的参考像素数Qr，并且识别图像形成 如果累积像素数Qt大于参考像素数Qr，则设备处于调色剂低状态。 该方法还包括将打印图像的浓度Di与预定的参考浓度Dr进行比较，并在调色剂低状态的情况下检测墨粉消耗。 该方法还包括如果显影单元被重新安装在调色剂耗尽状态，则确定显影单元是否是新的显影单元。

公开(公告)号：US20020141786A1

公开(公告)日：2002-10-03

申请号：US10046711

申请日：2002-01-17

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Woo-jung Shim ,  Chung-guk Baek

IPC分类号： G03G015/10

CPC分类号： G03G15/11

摘要： A squeezing device of a wet printer for separating a liquid carrier element that is not used for forming an image from ink supplied to the photosensitive belt, includes a squeezing roller mounted to be opposite to the photosensitive belt, a bias applying unit for biasing the squeezing roller with a certain potential, and a plurality of backup rollers mounted side by side to be opposite to the squeezing roller across the photosensitive belt placed between the plurality of backup rollers and the squeezing roller, in order to extend a contact width between the photosensitive belt and the squeezing roller. A printer to which the squeezing device of a wet printer is applied secures a sufficient charging time of the photosensitive belt and lowers a voltage for generating a townsend discharge, to thereby enhance charging performances and printing qualities.

摘要翻译： 用于将不用于形成图像的液体载体元件从供应给感光带的油墨分离的湿式打印机的挤压装置包括安装成与感光带相对的挤压辊，偏压施加单元，用于偏压挤压 具有一定电位的辊子，以及多个支撑辊并排安装，以与穿过位于多个支承辊和挤压辊之间的感光带相对的挤压辊相对，以便延伸感光带之间的接触宽度 和挤压辊。 使用湿式打印机的挤压装置的打印机确保感光带的足够的充电时间并降低用于产生乡镇放电的电压，从而提高充电性能和打印质量。