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    • 4. 发明公开
    • 액정 표시 장치 제어기
    • 液晶显示控制器
    • KR1020020013715A
    • 2002-02-21
    • KR1020010045246
    • 2001-07-26
    • 가부시키가이샤 히타치세이사쿠쇼
    • 구도야스유끼후루하시쯔또무요꼬따요시까즈마쯔도도시미쯔히가아쯔히로
    • G09G3/36
    • G09G3/3696G09G3/2014G09G3/2022G09G3/3611G09G2330/021
    • PURPOSE: A liquid crystal display controller is provided to obtain a full and/or partial display with good display quality and/or low power consumption based on the scanning period for an active scan line being dependent upon a number of reference clock pulses. CONSTITUTION: A liquid crystal display controller(101) includes an external device(101) provided with a CPU(101a), a memory(101b) and a bus connecting the CPU(101a) and the memory(101b). The external device(101) is connected to a liquid crystal display(LCD) apparatus controller(102) provided with a system interface(104), a control register(105), a reference clock generator(106), a timing generator(107), an address decoder(108), a display memory(109), a data line driver(110), a scanning line driver(111) and a driving voltage generator(112). The liquid crystal display controller(101) includes one or more of the following features: keeping the frequency substantially constant for different numbers of active scan lines, allowing change of the frequency due to characteristics of the LCD, displaying gradation with near linear effective voltage characteristics, displaying gradation data with lower power or displaying a partial or full screen in a mobile device, for example, a cell phone.
    • 目的:提供一种液晶显示控制器,用于根据参考时钟脉冲的数量,基于扫描期间获得具有良好显示质量和/或低功耗的全部和/或部分显示。 构成:液晶显示控制器(101)包括设置有CPU(101a)的外部设备(101),存储器(101b)和连接CPU(101a)和存储器(101b)的总线。 外部设备(101)连接到具有系统接口(104),控制寄存器(105),参考时钟发生器(106),定时发生器(107)的液晶显示器(LCD)设备控制器 ),地址解码器(108),显示存储器(109),数据线驱动器(110),扫描线驱动器(111)和驱动电压发生器(112)。 液晶显示控制器(101)包括以下特征中的一个或多个:对于不同数量的有源扫描线,保持频率基本恒定,允许由于LCD的特性而改变频率,显示具有接近线性有效电压特性的灰度 以较低功率显示灰度数据,或者在移动设备(例如,手机)中显示部分或全屏。
    • 9. 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。