公开(公告)号：KR1020010017115A

公开(公告)日：2001-03-05

申请号：KR1019990032464

申请日：1999-08-07

Applicant: 한국과학기술원

Inventor： 한철희 ,  정훈주 ,  이승우

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G2310/027

Abstract: PURPOSE: A circuit of digital driving for a liquid crystal displayer is provided to reduce the number of data bus lines and data latches by managing the information about bits of the digital image information in order according to time. CONSTITUTION: The device includes the first data latch(31), a shift register(33), the second data latch(32) and a digital/analog converter(34). The first data latch(31) stores the data of the digital image information in order through a data bus. The shift register(33) locks the operation of the first data latch(31) to the location of the digital image information input from the outside. The second data latch(32) stores the digital information stored in the first data latch(31) before converting into analog. The digital/analog converter(34) inputs the data of the digital image information stored in the second data latch(32) in order each bit and converts them into the analog signal.

Abstract translation: 目的：提供一种用于液晶显示器的数字驱动电路，通过根据时间顺序管理数字图像信息的位的信息来减少数据总线和数据锁存器的数量。 构成：该装置包括第一数据锁存器（31），移位寄存器（33），第二数据锁存器（32）和数/模转换器（34）。 第一数据锁存器（31）通过数据总线顺序存储数字图像信息的数据。 移位寄存器（33）将第一数据锁存器（31）的操作锁定到从外部输入的数字图像信息的位置。 第二数据锁存器（32）在转换成模拟之前存储存储在第一数据锁存器（31）中的数字信息。 数字/模拟转换器（34）按照每个位的顺序输入存储在第二数据锁存器（32）中的数字图像信息的数据，并将其转换为模拟信号。

公开(公告)号：KR1020030081919A

公开(公告)日：2003-10-22

申请号：KR1020020020378

申请日：2002-04-15

Applicant: 한국과학기술원

Inventor： 고준철 ,  정훈주

IPC: G09G3/30

Abstract: PURPOSE: A pixel circuit and an OLED(Organic Light Emitting Diode) display device using the same are provided to form uniformly the luminance of an OLED device by generating the driving current including a non-uniform threshold voltage of a polysilicon TFT. CONSTITUTION: A pixel circuit includes the first transistor(TFT1), the second transistor(TFT2), the first capacitor(C1), the third transistor(TFT3), the fourth transistor(TFT4), and the second capacitor(C2). The first transistor(TFT1) is used for receiving the voltage from data lines and outputting the driving current to an OLED. The second transistor(TFT2) is turned on or off according to a selective pulse through the first scan line in order to output the voltage to a gate terminal of the first transistor(TFT1). The first capacitor(C1) is used for storing a voltage difference between the gate terminal and a source terminal of the first transistor(TFT1). The third transistor(TFT3) is turned on or off according to the selective pulse through the first scan line in order to connect the first capacitor(C1) to the source terminal of the first transistor(TFT1). The fourth transistor(TFT4) is turned on or off according to the selective pulse through the second scan line in order to output the voltage of the data line to the outside. The second capacitor(C2) is used for storing the output voltage of the fourth transistor.

Abstract translation: 目的：提供使用其的像素电路和OLED（有机发光二极管）显示装置，以通过产生包括多晶硅TFT的不均匀阈值电压的驱动电流来均匀地形成OLED器件的亮度。 构成：像素电路包括第一晶体管（TFT1），第二晶体管（TFT2），第一电容器（C1），第三晶体管（TFT3），第四晶体管（TFT4）和第二电容器（C2）。 第一晶体管（TFT1）用于从数据线接收电压并将驱动电流输出到OLED。 根据通过第一扫描线的选择脉冲，第二晶体管（TFT2）导通或截止，以将电压输出到第一晶体管（TFT1）的栅极端子。 第一电容器（C1）用于存储栅极端子和第一晶体管（TFT1）的源极端子之间的电压差。 为了将第一电容器（C1）与第一晶体管（TFT1）的源极端子连接，第三晶体管（TFT3）根据通过第一扫描线的选择脉冲导通或截止。 根据通过第二扫描线的选择脉冲，第四晶体管（TFT4）导通或截止，以将数据线的电压输出到外部。 第二电容器（C2）用于存储第四晶体管的输出电压。

公开(公告)号：KR100345285B1

公开(公告)日：2002-07-25

申请号：KR1019990032464

申请日：1999-08-07

Applicant: 한국과학기술원

Inventor： 한철희 ,  정훈주 ,  이승우

IPC: G09G3/36

CPC classification number: G09G3/3688 ,  G09G2310/027

Abstract: 본발명은비트정보를시간에따라차례로처리함으로서비트정보가지나가는버스선의개수와열 방향과수직한방향으로필요한데이터래치의개수를줄여서구동회로가차지하는폭을감소시켜고밀도로집적이가능하게하는액정표시기용디지털구동회로에관한것으로서, 데이터버스를통해입력되는 n-비트의디지털영상정보를비트별로차례로입력받아표시하는액정표시기에있어서; 데이터버스를통해디지털영상정보의데이터를순서대로저장하는제1 데이터래치와, 상기제1 데이터래치의동작을외부에서입력되는디지털영상정보의위치와동기시키는쉬프트레지스터와, 상기제1 데이터래치에저장되었던디지털정보를아날로그로변환하기전에저장하는제2 데이터래치와, 상기제2 데이터래치에저장되어있는디지털영상정보의데이터를비트별로차례로입력받아서아날로그신호로변환하는디지털-아날로그변환기를포함하는것을특징으로한다.

公开(公告)号：KR100452114B1

公开(公告)日：2004-10-12

申请号：KR1020020020378

申请日：2002-04-15

Applicant: 한국과학기술원

Inventor： 고준철 ,  정훈주

IPC: G09G3/30

Abstract: PURPOSE: A pixel circuit and an OLED(Organic Light Emitting Diode) display device using the same are provided to form uniformly the luminance of an OLED device by generating the driving current including a non-uniform threshold voltage of a polysilicon TFT. CONSTITUTION: A pixel circuit includes the first transistor(TFT1), the second transistor(TFT2), the first capacitor(C1), the third transistor(TFT3), the fourth transistor(TFT4), and the second capacitor(C2). The first transistor(TFT1) is used for receiving the voltage from data lines and outputting the driving current to an OLED. The second transistor(TFT2) is turned on or off according to a selective pulse through the first scan line in order to output the voltage to a gate terminal of the first transistor(TFT1). The first capacitor(C1) is used for storing a voltage difference between the gate terminal and a source terminal of the first transistor(TFT1). The third transistor(TFT3) is turned on or off according to the selective pulse through the first scan line in order to connect the first capacitor(C1) to the source terminal of the first transistor(TFT1). The fourth transistor(TFT4) is turned on or off according to the selective pulse through the second scan line in order to output the voltage of the data line to the outside. The second capacitor(C2) is used for storing the output voltage of the fourth transistor.

Abstract translation: 目的：提供一种像素电路和使用其的OLED（有机发光二极管）显示装置，以通过产生包括多晶硅TFT的不均匀阈值电压的驱动电流来均匀地形成OLED器件的亮度。 构成：像素电路包括第一晶体管（TFT1），第二晶体管（TFT2），第一电容器（C1），第三晶体管（TFT3），第四晶体管（TFT4）和第二电容器（C2）。 第一晶体管（TFT1）用于接收来自数据线的电压并将驱动电流输出至OLED。 第二晶体管（TFT2）根据通过第一扫描线的选择性脉冲导通或截止，以便将电压输出到第一晶体管（TFT1）的栅极端子。 第一电容器（C1）用于存储第一晶体管（TFT1）的栅极端子和源极端子之间的电压差。 第三晶体管（TFT3）根据通过第一扫描线的选择性脉冲导通或截止，以便将第一电容器（C1）连接到第一晶体管（TFT1）的源极端子。 第四晶体管（TFT4）根据通过第二扫描线的选择脉冲导通或截止，以便将数据线的电压输出到外部。 第二电容器（C2）用于存储第四晶体管的输出电压。