公开(公告)号：KR1020090026998A

公开(公告)日：2009-03-16

申请号：KR1020070092134

申请日：2007-09-11

Applicant: 삼성전자주식회사

Inventor： 김형래

IPC: H03F3/45

CPC classification number: H03F3/45192 ,  H03F1/0205 ,  H03F1/083 ,  H03F3/3022 ,  H03F3/45219 ,  H03F3/45475 ,  H03F2200/153 ,  H03F2203/30015 ,  H03F2203/45236 ,  H03F2203/45244 ,  H03F2203/45248 ,  H03F2203/45318 ,  H03F2203/45352 ,  H03F2203/45512 ,  H03F2203/45626 ,  H03F2203/45726

Abstract: An operational amplifier having a high slew rate and stability is provided to output a stable voltage regardless of variation of a load capacitance. An operational amplifier(10-1) includes a differential amplifier(11), an output stage(23), and a control unit. The differential amplifier generates a first current and a second current in response to a voltage difference between a first input signal(Vin+) and a second input signal(Vin-). The first input signal is inputted through a first input terminal. The second input signal inputted through a second input terminal. The first current is outputted through a first output node(ND1). The second current is outputted through a second output node(ND2). The output stage generates an output signal(Vout) through the output node. The control unit receives a voltage of the first output node and a voltage of the second output node as a bias voltage, and controls an output current of the output stage in order to determine an output signal of the output stage in response to the voltage of the first output node and the voltage of the second output node.

Abstract translation: 提供具有高转换速率和稳定性的运算放大器以输出稳定的电压，而不管负载电容的变化如何。 运算放大器（10-1）包括差分放大器（11），输出级（23）和控制单元。 差分放大器响应于第一输入信号（Vin +）和第二输入信号（Vin-）之间的电压差产生第一电流和第二电流。 第一输入信号通过第一输入端输入。 通过第二输入端输入的第二输入信号。 通过第一输出节点（ND1）输出第一电流。 第二电流通过第二输出节点（ND2）输出。 输出级通过输出节点产生输出信号（Vout）。 控制单元接收第一输出节点的电压和第二输出节点的电压作为偏置电压，并且控制输出级的输出电流，以便响应于输出级的电压来确定输出级的输出信号 第一输出节点和第二输出节点的电压。

公开(公告)号：KR1020090012811A

公开(公告)日：2009-02-04

申请号：KR1020070076963

申请日：2007-07-31

Applicant: 삼성전자주식회사

Inventor： 김형래

IPC: H03F3/45 ,  G09G3/296

CPC classification number: H03F3/45183 ,  G09G3/3688 ,  H03F3/45708 ,  H03F2203/45248 ,  H03F2203/45366

Abstract: A rail-to-rail operational amplifier and a display driver IC are provided to obtain little power consumption and high slew rate by varying first input stage current and second input stage current proportionally to voltage difference of a differential input signal pair. According to voltage difference of a differential input signal pair, a first input stage circuit(100) provides first input stage current. According to the voltage difference of the differential input signal pair, a second input stage circuit(200) provides second input stage current. An output stage circuit(320) produces output signal based on the first and second input stage currents. The first input stage circuit and the second input stage circuit have similar configuration. The first input stage circuit has a differential amplifier, a first adaptive biasing circuit and a second adaptive biasing circuit. According to the differential amplifier(110) is the voltage difference of the differential input signal pair, it is generated the first current and the complementarily controlled second current. The first adaptive biasing circuit(120) controls first adaptive variable current for comprising tail current of the differential amplifier based on the first current. The second adaptive biasing circuit(130) controls the second adaptive variable current for comprising the tail current of the differential amplifier based on the second current. The first adaptive variable current and the second adaptive variable current are complementarily varied based on the voltage difference of the differential input signal pair.

Abstract translation: 提供轨到轨运算放大器和显示驱动器IC，以通过与差分输入信号对的电压差成比例地改变第一输入级电流和第二输入级电流来获得少量功耗和高转换速率。 根据差分输入信号对的电压差，第一输入级电路（100）提供第一输入级电流。 根据差分输入信号对的电压差，第二输入级电路（200）提供第二输入级电流。 输出级电路（320）基于第一和第二输入级电流产生输出信号。 第一输入级电路和第二输入级电路具有相似的结构。 第一输入级电路具有差分放大器，第一自适应偏置电路和第二自适应偏置电路。 根据差分放大器（110）是差分输入信号对的电压差，产生第一电流和互补控制的第二电流。 第一自适应偏置电路（120）基于第一电流来控制包括差分放大器的尾电流的第一自适应可变电流。 第二自适应偏置电路（130）基于第二电流来控制包括差分放大器的尾电流的第二自适应可变电流。 第一自适应可变电流和第二自适应可变电流根据差分输入信号对的电压差互补地变化。

公开(公告)号：KR1020080064931A

公开(公告)日：2008-07-10

申请号：KR1020070001823

申请日：2007-01-07

Applicant: 삼성전자주식회사

Inventor： 정준호 ,  김형래 ,  박영준 ,  성준호

IPC: G02F1/133

CPC classification number: G09G3/342 ,  G09G2310/0237 ,  G09G2310/024 ,  G09G2320/0247 ,  G09G2320/0261 ,  G09G2320/064 ,  G09G2320/103

Abstract: A display device and a backlight scanning method thereof are provided to reduce a motion blur and a flicker efficiently by driving a backlight based on a scanning signal. A display device includes an image processor(201), a display panel driver(202), a backlight emitting unit(303), a parameter generator(301), and a backlight driver(302). The image processor receives and processes an image signal to be displayed on a display panel. The display panel driver drives the display panel to display the image signal. The parameter generator calculates parameters to extract motion characteristics from the image signal. The backlight driver generates a scanning signal adjusted according to the parameters generated by the parameter generator. The scanning signal has a plurality of scanning pulses during one frame period.

Abstract translation: 提供一种显示装置及其背光扫描方法，用于通过基于扫描信号驱动背光来有效地减少运动模糊和闪烁。 显示装置包括图像处理器（201），显示面板驱动器（202），背光源发光单元（303），参数发生器（301）和背光驱动器（302）。 图像处理器接收并处理要在显示面板上显示的图像信号。 显示面板驱动程序驱动显示面板显示图像信号。 参数发生器计算参数以从图像信号中提取运动特性。 背光驱动器产生根据参数发生器产生的参数调整的扫描信号。 扫描信号在一帧期间具有多个扫描脉冲。

公开(公告)号：KR1020080044714A

公开(公告)日：2008-05-21

申请号：KR1020060114120

申请日：2006-11-17

Applicant: 삼성전자주식회사

Inventor： 최학훈 ,  김형래

IPC: H04N7/01 ,  G09G5/00

CPC classification number: H04N7/0127 ,  G06T7/269 ,  H04N7/012

Abstract: A display device for displaying an image in response to an inputted image signal and a display method are provided to perform an image process adaptively in response to the image signal and improve image quality with reduced energy consumption. An image processing unit(110) changes a frame rate of an inputted image signal and outputs the changed image signal. A display unit(120) displays an image on the basis of the image signal outputted by the image processing unit. A motion evaluating unit(130) evaluates a motion change quantity between frames of the image signal inputted in the image processing unit. A control unit(140) controls the image processing unit to adjust a change quantity of the frame rate of the image signal according to the motion change quantity evaluated by the motion evaluating unit.

Abstract translation: 提供用于响应于输入的图像信号和显示方法显示图像的显示装置，以响应于图像信号自适应地执行图像处理，并以降低的能量消耗提高图像质量。 图像处理单元（110）改变输入的图像信号的帧速率并输出改变的图像信号。 显示单元（120）基于由图像处理单元输出的图像信号显示图像。 运动评估单元（130）评估在图像处理单元中输入的图像信号的帧之间的运动变化量。 控制单元（140）控制图像处理单元根据由运动评估单元评估的运动变化量来调整图像信号的帧速率的变化量。

公开(公告)号：KR100815588B1

公开(公告)日：2008-03-20

申请号：KR1020060077324

申请日：2006-08-16

Applicant: 삼성전자주식회사

Inventor： 정준호 ,  성준호 ,  성기범 ,  첸한펭 ,  김형래

IPC: H04N5/57 ,  G02F1/13357 ,  G09G3/22

Abstract: 디스플레이장치 및 그 밝기조정방법이 개시된다. 본 발명의 디스플레이장치는 영상을 디스플레이하는 디스플레이장치에 있어서, 소정 개수의 부분영역으로 분할되어 각 부분영역별로 밝기가 조정되는 발광부; 발광부에 연결되어 발광부의 각 부분영역의 밝기를 조절하는 구동부; 및 입력되는 영상신호에 대응하여 발광부의 각 부분영역의 밝기조정에 적용될 대표값을 계산하고, 상기 대표값을 콘트라스트 개선(contrast enhancement)기법으로 보상하여 상기 구동부로 출력하는 제어부를 포함한다. 본 발명에 따르면, 백라이트의 각 부분영역별 밝기조정이 이루어짐으로써 발생되는 인접 부분영역과의 상호작용에 의한 밝기 증감을 보상하도록 각 부분영역의 밝기조정을 위해 적용될 대표값을 조절하여 명암비를 효과적으로 개선시킬 수 있는 디스플레이장치 및 그 밝기조정방법이 제공된다.
백라이트, 부분영역, 콘트라스트 개선, 히스토그램 이퀄라이제이션, 스트레치, 바이 히스토그램 이퀄라이제이션

公开(公告)号：KR100759902B1

公开(公告)日：2007-09-18

申请号：KR1020060077771

申请日：2006-08-17

Applicant: 삼성전자주식회사

Inventor： 첸한펭 ,  성준호 ,  성기범 ,  김형래 ,  정준호 ,  최훈

IPC: G09G3/36 ,  G09G3/20 ,  G02F1/133

CPC classification number: G09G3/3406 ,  G02F1/1336 ,  G09G3/36 ,  G09G2310/027

Abstract: A liquid crystal display and a method of adjusting brightness for the same are provided to enhance brightness ratio by controlling brightness for each area of a back light unit in correspondence to image signals. A liquid crystal display comprises a back light unit(300), a liquid crystal display unit(400), and a control unit(200). The back light unit includes a light emitting unit(320) divided into a plurality of partial areas such that the brightness of each partial area is controlled. The liquid crystal display unit includes an LCD panel unit(420) and an LCD drive unit(410). The control unit calculates representative value applied to control brightness of each partial area in correspondence to image signals, reduces the representative value by a predetermined ratio to reduce power consumption, and outputs the reduced representative value to the back light unit.

Abstract translation: 提供液晶显示器和调整其亮度的方法，以通过根据图像信号控制背光单元的每个区域的亮度来增强亮度比。 液晶显示器包括背光单元（300），液晶显示单元（400）和控制单元（200）。 背光单元包括被分成多个部分区域的发光单元（320），使得每个部分区域的亮度被控制。 液晶显示单元包括LCD面板单元（420）和LCD驱动单元（410）。 控制单元对应于图像信号计算应用于控制每个部分区域的亮度的代表值，将代表值减小预定比例以减少功耗，并将减小的代表值输出到背光单元。

公开(公告)号：KR1020070092533A

公开(公告)日：2007-09-13

申请号：KR1020060022797

申请日：2006-03-10

Applicant: 삼성전자주식회사

Inventor： 김형래 ,  이동열

IPC: G02F1/133

CPC classification number: G09G3/3406 ,  G09G2310/08 ,  G09G2320/064

Abstract: An apparatus and a method for generating backlight signals synchronized with a frame signal are provided to synchronize blinking frequencies of a backlight signal with frequencies of the frame signal, thereby removing flickers generated in an LCD(Liquid Crystal Display). A source driver(114) drives data lines of a display panel(102) based on digital video data. A gate driver(116) successively drives gate lines of the display panel. A timing controller(120) generates a frame signal and a line clock signal in response to a first control signal. A light source control signal generator(122) generates a light source control signal synchronized with the frame signal based on a second control signal and the line clock signal. The light source control signal generator includes a line counter for outputting a count value in response to the light source control signal and the line clock signal, and a comparator for comparing the count value with the second control signal and outputting the light source control signal as a comparison result.

Abstract translation: 提供一种用于产生与帧信号同步的背光信号的装置和方法，以使背光信号的闪烁频率与帧信号的频率同步，从而消除在LCD（液晶显示器）中产生的闪烁。 源驱动器（114）基于数字视频数据驱动显示面板（102）的数据线。 栅极驱动器（116）依次驱动显示面板的栅极线。 定时控制器（120）响应于第一控制信号产生帧信号和行时钟信号。 光源控制信号发生器（122）基于第二控制信号和行时钟信号产生与帧信号同步的光源控制信号。 光源控制信号发生器包括用于响应于光源控制信号和行时钟信号输出计数值的行计数器，以及用于将计数值与第二控制信号进行比较的比较器，并将光源控制信号输出为 比较结果。

公开(公告)号：KR100707306B1

公开(公告)日：2007-04-12

申请号：KR1020050017820

申请日：2005-03-03

Applicant: 삼성전자주식회사

Inventor： 김형래 ,  최윤경 ,  조민수

IPC: G09G3/36 ,  G09G3/20

CPC classification number: G05F3/245

Abstract: 본 발명의 기준 전압 발생기는 출력전압이 온도에 반비례하는 다양한 온도계수를 구현할 수 있으며, 온도계수가 다르더라도 상온에서 동일한 출력전압을 생성할 수 있어 안정적인 전압을 공급할 수 있는 것을 특징으로 한다. 본 발명에 의하면 온도에 따라 반비례하는 출력전압을 생성하는 기준 전압 발생기를 제공하여, TFT-LCD의 게이트 드라이버에 고온에서도 안정적인 전압을 공급할 수 있게 되어 TFT-LCD의 고온에서의 신뢰성을 향상시킬 수 있다.

公开(公告)号：KR1020050022069A

公开(公告)日：2005-03-07

申请号：KR1020030059094

申请日：2003-08-26

Applicant: 삼성전자주식회사

Inventor： 김형래

IPC: H02M3/155

CPC classification number: H02M3/07

Abstract: PURPOSE: A boosting circuit, a boosting power device, and a power boosting control method are provided to reduce the number of external capacitors and generate boosting voltages which are stepped up or stepped down due to the charging or pumping by two-phase drive. CONSTITUTION: A boosting circuit comprises the first capacitor(C1) connected between the first node(35) and the second node(36); the second capacitor(C2) connected between the third node(37) and the fourth node(38); the third capacitor(C3) connected between the first boosted voltage output node(39) and the third power(GND); the fourth capacitor(C4) connected between the second boosted voltage output node(40) and the third power; the first switch(21) for switching connection or disconnection between the fourth power(-VCI) and the first node in response to the logic of the first control signal(a); the second switch(22) for switching connection or disconnection between the fourth power and the third node in response to the logic of the second control signal(b); the third switch(23) for switching connection or disconnection between the third power and the third node in response to the logic of a third control signal(c); the fourth switch(24) for switching connection or disconnection between the first node and the first boosted voltage output node in response to the logic of the fourth control signal(d); and the fifth switch(25) for switching connection or disconnection between the first node and the first power in response to the logic of the fifth control signal(e).

Abstract translation: 目的：提供升压电路，升压功率器件和功率提升控制方法，以减少外部电容器的数量，并产生由于通过两相驱动进行充电或泵送而升压或降压的升压电压。 构成：升压电路包括连接在第一节点（35）和第二节点（36）之间的第一电容器（C1）。 连接在第三节点（37）和第四节点（38）之间的第二电容器（C2）; 连接在第一升压电压输出节点（39）和第三电源（GND）之间的第三电容器（C3）; 连接在第二升压电压输出节点（40）和第三电源之间的第四电容器（C4） 用于响应于第一控制信号（a）的逻辑，切换第四电源（-VCI）和第一节点之间的连接或断开的第一开关（21）。 用于响应于第二控制信号（b）的逻辑来切换第四电源和第三节点之间的连接或断开的第二开关（22）。 用于响应于第三控制信号（c）的逻辑来切换第三电源和第三节点之间的连接或断开的第三开关（23）。 用于响应于第四控制信号（d）的逻辑，切换第一节点和第一升压电压输出节点之间的连接或断开的第四开关（24）。 以及用于响应于第五控制信号（e）的逻辑来切换第一节点和第一功率之间的连接或断开的第五开关（25）。

公开(公告)号：KR1020040043221A

公开(公告)日：2004-05-24

申请号：KR1020020071390

申请日：2002-11-16

Applicant: 삼성전자주식회사

Inventor： 김형래 ,  박재호

IPC: G02F1/133

CPC classification number: G09G3/3696 ,  G09G3/3625 ,  G09G2330/021

Abstract: PURPOSE: A super twist nematic liquid crystal display diving circuit is provided to decrease the number of external capacitors and minimize power consumption. CONSTITUTION: A super twist nematic liquid crystal display driving circuit(300) includes a reference voltage generator(310), a voltage booster(320), a voltage controller(330), and the first and second common voltage generators(350,370). The reference voltage generator generates a reference voltage(VREF) in response to an external voltage(VCI). The voltage controller generates the first and second segment voltages(VM,V1) for driving a segment electrode of a super twist nematic liquid crystal display panel in response to the reference voltage and a boosted voltage(VCSL). The first common voltage generator generates the first common voltage(+VR) that is controller to be higher than the first segment voltage and drives a common electrode of the liquid crystal display panel. The second common voltage generator generates the second common voltage(-VR) that is controlled to be lower than the first segment voltage and drives the common electrode of the liquid crystal display panel.

Abstract translation: 目的：提供超扭曲向列型液晶显示器潜水电路，减少外部电容器的数量，降低功耗。 构成：超扭曲向列液晶显示驱动电路（300）包括参考电压发生器（310），升压器（320），电压控制器（330）以及第一和第二公共电压发生器（350,370）。 参考电压发生器响应于外部电压（VCI）产生参考电压（VREF）。 电压控制器响应于参考电压和升压电压（VCSL）产生用于驱动超扭曲向列型液晶显示面板的段电极的第一和第二段电压（VM，V1）。 第一公共电压发生器产生第一公共电压（+ VR），其是控制器高于第一段电压并驱动液晶显示面板的公共电极。 第二公共电压发生器产生被控制为低于第一段电压并驱动液晶显示面板的公共电极的第二公共电压（-VR）。