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    • 2. 发明授权
    • 액정 표시 장치
    • 액정표시장치
    • KR100461485B1
    • 2004-12-14
    • KR1020020020666
    • 2002-04-16
    • 가부시키가이샤 히타치세이사쿠쇼
    • 가와찌겐시로우미야자와도시오나가따데쯔야하세가와아쯔시
    • G02F1/1335
    • G02F1/133555G02F1/136213H01L27/12H01L27/1214
    • In a liquid crystal display device having a transmissive display region and a reflective display region within a unit pixel, the present invention disposes an optical reflection layer having an almost rectangular planar shape as extended in the unit pixel elongate direction at substantially a central portion midway between two neighboring signal electrodes, defines almost rectangular regions between the optical reflection layer and two signal electrodes adjacent thereto as the transmissive display region in the unit pixel, and forms a pixel electrode at a level spaced from that of the optical reflection layer by a dielectric film so as to cover the entire surface of the unit pixel, so that power consumption of the liquid crystal display device is reduced while image quality thereof is improved.
    • 在单位像素内具有透射显示区域和反射显示区域的液晶显示装置中,本发明在单元像素长度方向上延伸的具有近似矩形平面形状的光学反射层设置在基本中央部分 两个相邻的信号电极在光学反射层和与其相邻的两个信号电极之间限定几乎为矩形的区域作为单位像素中的透射显示区域,并且通过介电膜形成与光学反射层隔开的级别的像素电极 以覆盖单位像素的整个表面,从而降低液晶显示装置的功耗,同时提高其图像质量。
    • 4. 发明公开
    • 액정 표시 장치 및 그 구동 방법
    • 液晶显示装置及其驱动方法
    • KR1020010030358A
    • 2001-04-16
    • KR1020000053684
    • 2000-09-09
    • 가부시키가이샤 히타치세이사쿠쇼
    • 구도야스유끼후루하시쯔또무미야자와도시오미까미요시로아끼모또하지메만바노리오
    • G02F1/136
    • G09G3/3688G09G3/2014G09G3/3648G09G3/3655G09G2310/0259
    • PURPOSE: To control transmissivity of each liquid crystal cell with pulse width of a gradation voltage control signal and to reduce an increase of a circuit scale even when the number of gradation is increased by turning on a gate of a pixel on a scanning line and turning off the gates of the pixels on other non-scanning lines. CONSTITUTION: For example, in the case of the liquid crystal cell 11, the gate is turned on when a scanning line signal Vy1 is 'low', and the gradation voltage control signal Vx1 is 'high', and a gradation voltage Vd1 at this time is applied to the liquid crystal cell 11. Then, the potential (V 40) that the gradation voltage control signal Vx1 arrives at the last of the 'high' period is held to become the applied voltage to the liquid crystal cell until a next frame. From this fact, the matter that the gradation information 40 of the pixel of the liquid crystal cell 11 is converted to the liquid crystal applied voltage V 40 is obtained. Thus, an applied voltage effective value of each pixel is controlled according to the display data, and an active matrix type liquid crystal display device is realized.
    • 目的:为了控制具有灰度电压控制信号的脉冲宽度的每个液晶单元的透射率,并且即使当通过打开扫描线上的像素的栅极和转动来增加灰度的数量时,也可以减小电路规模的增加 关闭其他非扫描线上的像素的栅极。 例如,在液晶单元11的情况下,当扫描线信号Vy1为“低”时,栅极导通,灰度电压控制信号Vx1为“高”,此时的栅极电压为Vd1 时间被施加到液晶单元11.然后,保持灰度电压控制信号Vx1在“高”周期的最后到达的电位(V 40)成为向液晶单元施加的电压,直到下一个 帧。 从该事实可知,液晶单元11的像素的灰度信息40被转换为液晶施加电压V 40。 因此,根据显示数据控制每个像素的施加电压有效值,并实现有源矩阵型液晶显示装置。
    • 7. 发明公开
    • 화상 표시 장치
    • 图像显示设备
    • KR1020020002189A
    • 2002-01-09
    • KR1020010009634
    • 2001-02-26
    • 가부시키가이샤 히타치세이사쿠쇼
    • 아끼모또하지메미까미요시로미야자와도시오
    • G02F1/133
    • G09G3/3648G09G3/20G09G3/32G09G3/3406G09G3/3677G09G3/3688G09G2300/0842G09G2310/0205G09G2310/027G09G2310/0297G09G2320/062G09G2320/0633G09G2330/021G09G2340/0407G09G2340/0428
    • PURPOSE: To reduce the power consumption of a display device. CONSTITUTION: This display device is a picture display device which has a display part 50 constituted of plural pixels 10 and a control part 20 performing the control of the display part 50, and the device has a D/A conversion part converting digital display data into an analog picture signal, and this D/A conversion part is constituted of a first D/A conversion part (low power- consumption D/A converter) and a second D/A conversion part (highly accurate D/A converter 11). When these two D/A conversion parts are compared from the view point of the power consumption at the time of operations, since the power consumption at the time of the operation of the first D/A conversion part is smaller than that at the time of the operation of the second D/A conversion part, the device outputs a converted analog signal to the display part 50 by operating either the first D/A conversion part or the second D/A conversion part in accordance with the command of the control part 20 and the display part 50 changes the number of independent display pixels of the part 50 in accordance with the command of the control part 20 and performs the display according to the analog picture signal.
    • 目的:降低显示设备的功耗。 构成:该显示装置是具有由多个像素10构成的显示部50和进行显示部50的控制的控制部20的图像显示装置,该装置具有将数字显示数据变换为 模拟图像信号,该D / A转换部分由第一D / A转换部分(低功耗D / A转换器)和第二D / A转换部分(高精度D / A转换器11)构成。 当从操作时的功耗的观点来比较这两个D / A转换部分时,由于第一D / A转换部分的操作时的功耗小于 第二D / A转换部分的操作,该装置根据控制部分的命令通过操作第一D / A转换部分或第二D / A转换部分将转换的模拟信号输出到显示部分50 20,并且显示部分50根据控制部分20的命令改变部分50的独立显示像素的数量,并根据模拟图像信号执行显示。
    • 8. 发明授权
    • 액정 표시 장치 및 그 구동 방법
    • 액정표시장치및그구동방법
    • KR100405014B1
    • 2003-11-07
    • KR1020000053684
    • 2000-09-09
    • 가부시키가이샤 히타치세이사쿠쇼
    • 구도야스유끼후루하시쯔또무미야자와도시오미까미요시로아끼모또하지메만바노리오
    • G02F1/136
    • G09G3/3688G09G3/2014G09G3/3648G09G3/3655G09G2310/0259
    • An active matrix type liquid crystal display apparatus includes a display pixel unit including a plurality of pixels arranged in a matrix; a data signal driving circuit for outputting a gray-scale voltage control signal to the pixels and having a pulse width in accordance with gray-scale information of display data, a scan signal driving circuit for outputting at least one of an active voltage and inactive voltage to the pixels, and a gray-scale voltage selecting circuit for outputting a gray-scale voltage to the pixels. The gray-scale voltage in increased and decreased in accordance with time. Each of the pixels includes a liquid crystal cell and a switching element having a drain terminal, a common terminal and a gate terminal. The gate terminal is connected to the data signal driving circuit through a gate electrode, the common terminal is connected to the scan signal driving circuit through a common electrode, and the drain terminal is connected to the gray-scale voltage selecting circuit through a drain electrode.
    • 有源矩阵型液晶显示装置包括:显示像素单元,包括排列成矩阵的多个像素; 数据信号驱动电路,用于向像素输出灰度电压控制信号,并且具有与显示数据的灰度信息相应的脉冲宽度;扫描信号驱动电路,用于输出有效电压和无效电压中的至少一个 以及用于向像素输出灰阶电压的灰阶电压选择电路。 灰度电压随时间增加和减少。 每个像素包括液晶单元和具有漏极端子,公共端子和栅极端子的开关元件。 栅极端通过栅极连接数据信号驱动电路,公共端通过公共电极连接扫描信号驱动电路,漏极端通过漏极连接灰阶电压选择电路 。
    • 10. 发明公开
    • 액정 표시 장치
    • 液晶显示器
    • KR1020020081108A
    • 2002-10-26
    • KR1020020020666
    • 2002-04-16
    • 가부시키가이샤 히타치세이사쿠쇼
    • 가와찌겐시로우미야자와도시오나가따데쯔야하세가와아쯔시
    • G02F1/1335
    • G02F1/133555G02F1/136213H01L27/12H01L27/1214
    • PURPOSE: To realize a liquid crystal display with low power consumption and high image quality. CONSTITUTION: In a partial transmission and reflective liquid crystal display having a transmission display area and a reflex area in a unit pixel, a light reflex layer is arranged at an approximately center part between two adjacent signal electrodes, defined as the plane shape of approximately rectangular shape extended in the longitudinal direction of the pixel and an approximately rectangular area among the reflection layer and two signal electrodes adjacent to it is stipulated as the transmission display area. A pixel electrode formed by the light reflex layer and an insulation film is formed so as to cover the almost entire surface of the pixel area. Consequently, area of a liquid crystal electrode can be maximized and the total opening ratio a can be increased. Area of a reflex display part can be maximized whole preventing occurrence of short- circuit between the light reflex layer and the signal electrode. In addition, area ratio of reflex to transmission can be freely designed by adjusting the length of a short axis of the nearly rectangular light reflex layer.
    • 目的:实现低功耗,高图像质量的液晶显示。 构成:在具有单位像素中的透射显示区域和反射区域的部分透射和反射型液晶显示器中,光反射层布置在两个相邻信号电极之间的大致中心部分,被定义为大致矩形的平面形状 形状在像素的纵向方向上延伸,并且反射层和与其相邻的两个信号电极之间的大致矩形区域被规定为透射显示区域。 形成由光反射层和绝缘膜形成的像素电极,以覆盖像素区域的几乎整个表面。 因此,液晶电极的面积可以最大化,并且总开口率a可以增加。 反射显示部分的面积可以最大化,防止光反射层和信号电极之间发生短路。 另外,通过调整近似矩形的光反射层的短轴的长度,可以自由地设计反射与透射的面积比。