公开(公告)号：US06259754B1

公开(公告)日：2001-07-10

申请号：US09105744

申请日：1998-06-26

申请人： Tae Bo Jeong

发明人： Tae Bo Jeong

IPC分类号： H03D324

CPC分类号： H03D13/003

摘要： A phase frequency detection circuit of a phase locked loop (PLL) for liquid crystal display which compares a phase between an external synchronous signal and an internal synchronous signal from the PLL to generate a phase difference detection signal, including: a dividing circuit for dividing the external synchronous signal and the horizontal synchronous signal; a phase difference detecting circuit for detecting the phase difference between the divided external synchronous signal and the divided horizontal synchronous signal from the dividing circuit; a phase discriminating circuit for discriminating whether the divided external synchronous signal is ahead of the divided horizontal synchronous signal and generating the phase discriminating signal; and a comparison device for receiving the phase difference detection signal from the phase difference detection circuit and the phase discriminating signal from the phase discriminating circuit to generate the phase frequency difference signal.

摘要翻译： 一种用于液晶显示器的锁相环（PLL）的相位频率检测电路，其比较来自PLL的外部同步信号和内部同步信号之间的相位，以产生相位差检测信号，包括：除法电路 外部同步信号和水平同步信号; 相位差检测电路，用于检测来自分频电路的分频外部同步信号和分频水平同步信号之间的相位差; 用于鉴别划分的外部同步信号是否在划分的水平同步信号之前并产生相位鉴别信号的相位鉴别电路; 以及用于从相位差检测电路接收相位差检测信号和来自相位鉴别电路的相位鉴别信号以产生相位差信号的比较装置。

公开(公告)号：US6144357A

公开(公告)日：2000-11-07

申请号：US106570

申请日：1998-06-29

申请人： Tae Bo Jeong

发明人： Tae Bo Jeong

IPC分类号： G09G3/36 ,  H02M3/07

CPC分类号： H02M3/07 ,  G09G3/3696 ,  G09G2330/021

摘要： A driving circuit is provided for generating driving voltages of a liquid crystal display comprising a plurality of thin film transistors, each of which includes a source, drain, and gate. The driving circuit includes: a switching part for generating first to fourth control signals which swing between a first power voltage and a second power voltage using first to fourth input logic control signals; a driving voltage generating part controlled by the first to the fourth control signals, for generating gate on and off voltages for turning on and off said thin film transistors by raising said second power voltage and dropping said first power voltage; and a voltage maintenance part for maintaining said gate on and off voltages inputted from said driving voltage generating part at a selected voltage level.

摘要翻译： 提供一种用于产生包括多个薄膜晶体管的液晶显示器的驱动电压的驱动电路，每个薄膜晶体管包括源极，漏极和栅极。 驱动电路包括：开关部，用于使用第一至第四输入逻辑控制信号产生在第一电源电压和第二电源电压之间摆动的第一至第四控制信号; 由所述第一至第四控制信号控制的驱动电压产生部分，用于产生用于通过升高所述第二电源电压并降低所述第一电源电压来导通和关断所述薄膜晶体管的栅极导通和关断电压; 以及电压维持部，用于将从所述驱动电压产生部输入的所述栅极导通和截止电压维持在选定的电压电平。

公开(公告)号：US06369856B1

公开(公告)日：2002-04-09

申请号：US09108032

申请日：1998-06-30

申请人： Tae Bo Jeong

发明人： Tae Bo Jeong

IPC分类号： H04N510

CPC分类号： H04N5/10

摘要： A synchronous signal detection circuit which detect a vertical synchronous signal and a horizontal synchronous signal from composite synchronous signal, including: a reset generation means for receiving an external composite synchronous signal and an external main clock signal to generate a reset signal at falling edge of the composite synchronous signal; a counter means being reset by the reset signal received from the reset generation means and for counting the main clock signal to generate first through fourth output signals; a vertical synchronous signal detection means for receiving the second output signal of the counter means and the composite synchronous signal to detect the vertical synchronous signal of the composite synchronous signal and generating the vertical synchronous signal; and a horizontal synchronous signal detection means for receiving the third and the fourth output signals of the counter means and the reset signal of the reset generation means to detect the horizontal synchronous signal of composite synchronous signal having a period of 1 horizontal scanning interval (1H).

摘要翻译： 一种从复合同步信号检测垂直同步信号和水平同步信号的同步信号检测电路，包括：复位产生装置，用于接收外部复合同步信号和外部主时钟信号，以在下行沿产生复位信号 复合同步信号; 计数器装置由从复位产生装置接收到的复位信号复位，并用于对主时钟信号进行计数以产生第一至第四输出信号; 垂直同步信号检测装置，用于接收计数装置的第二输出信号和复合同步信号，以检测复合同步信号的垂直同步信号并产生垂直同步信号; 以及水平同步信号检测装置，用于接收计数器装置的第三和第四输出信号和复位产生装置的复位信号，以检测具有1个水平扫描间隔（1H）的周期的复合同步信号的水平同步信号， 。

公开(公告)号：US06362805B1

公开(公告)日：2002-03-26

申请号：US09276415

申请日：1999-03-25

申请人： Tae Bo Jeong

发明人： Tae Bo Jeong

IPC分类号： G09G336

CPC分类号： G09G5/006

摘要： A mode detection circuits in LCDs is disclosed, comprising: a first mode signal detection means for detecting an enable/synchronous signal mode in response to a vertical synchronous signal and for generating a first mode detection signal; a second mode signal detection means for detecting an enable mode signal based on a data enable signal and a clock signal and for generating a second mode detection signal; a mode selection means for selecting one of a first mode detection signal and a second mode detection signal from the first mode signal detection means and the second mode signal detection means in response to a mode selection signal and for providing the selected mode detection signal as a mode determining signal.

摘要翻译： 公开了一种LCD中的模式检测电路，包括：第一模式信号检测装置，用于响应于垂直同步信号检测使能/同步信号模式并产生第一模式检测信号; 第二模式信号检测装置，用于基于数据使能信号和时钟信号检测使能模式信号，并用于产生第二模式检测信号; 模式选择装置，用于响应于模式选择信号从第一模式信号检测装置和第二模式信号检测装置中选择第一模式检测信号和第二模式检测信号中的一个，并将所选择的模式检测信号提供为 模式确定信号。