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1.发明公开Driving apparatus for active driving of liquid crystal display 失效Steuereinrichtungfüraktive Steuerung einerFlüssigkristallanzeigeeinrichtung。
公开(公告)号：EP0678844A1
公开(公告)日：1995-10-25
申请号：EP95105680.3
申请日：1995-04-14
IPC分类号： G09G3/36
CPC分类号： G09G3/3625
摘要： A driving apparatus for driving a passive matrix liquid crystal display utilizing an active driving method includes an image buffer storage (100) for storing one frame of image data (Sv) in the form of matrix to outputs image data (Sv:232) column by column to produce a rearranged image data (S100). A matrix generator (3) generates a row data (S3). A data converter (300) multiplies the rearranged image data (S100) with the row vectors (Sm) to produce a converted data (S300). A converted data buffer storage (400) stores the converted data (S300) and outputs row by row to produce a column data (S400). A LCD driver (500) is provided for producing a column signal (S9) based on the column data (S400) and a row signal (S13) based on the row data (S3), and further applying these row and column signals (S13 and S9) to the row and column electrodes (221 and 222), respectively, to drive the LCD.
摘要翻译： 利用主动驱动方法驱动无源矩阵液晶显示器的驱动装置包括：图像缓冲存储器（100），用于以矩阵形式存储一帧图像数据（Sv），以通过以下方式输出图像数据（Sv：232） 列以产生重新排列的图像数据（S100）。 矩阵生成器（3）生成行数据（S3）。 数据转换器（300）将重新布置的图像数据（S100）与行向量（Sm）相乘以产生转换数据（S300）。 转换后的数据缓冲存储器（400）存储转换后的数据（S300），逐行输出，生成列数据（S400）。 提供LCD驱动器（500），用于基于列数据（S400）和基于行数据（S3）的行信号（S13）产生列信号（S9），并且进一步应用这些行和列信号（S13 和S9）分别连接到行和列电极（221和222）以驱动LCD。
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公开(公告)号：EP0140716B1
公开(公告)日：1991-01-23
申请号：EP84307529.2
申请日：1984-11-01
IPC分类号： H04N9/83
CPC分类号： H04N9/8707 , H04N9/831
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公开(公告)号：EP0178868A3
公开(公告)日：1988-08-17
申请号：EP85307312
申请日：1985-10-11
CPC分类号： H04N9/79 , H04N9/7921 , H04N9/831
摘要： A chrominance signal processing apparatus used for such as the color television signal recording and reproducing apparatus (VTR) to record and reproduce a color television signal, comprises means (2,3,26,17,24) for converting a carrier chrominance signal (fsc) to a low-band signal (fc) for recording, and, for reproduction, means (27,16,13) for reconverting the converted low-band signal (fc) to the carrier chrominance signal (fsc) of the original color subcarrier frequency, to thereby record and reproduce the chrominance signal. Means (40, 41, 42, 43) for detecting the burst in the carrier chrominance signal (fsc) necessary for the level adjustment of the chrominance signal or for the control of the conversion frequency or for discrimination of black and white signal under a state of the low-band converted chrominance signal during recording and reproduction, the level detection, phase detection, and synchronous detection in low frequency are made possible. Further, the level detection, phase detection, and synchronous detection are carried out after once demodulating the low-band converted chrominance signal into two color difference signals in the base band to thereby use a part of circuit in common and improve performance. Furthermore, by performing digital sampling demodulation for demodulating the low-band inverted burst into the base band by means of an AID converter and digital circuits, integration of digital LSis, combined used of detection circuits, detection circuits and a part of frequency conversion circuits, realization of any non-linear characteristics and reduction of external parts such as analog filters become possible of the chrominance signal processing apparatus. Accordingly, a small and inexpensive chrominance signal processing apparatus of low consumption power is realized.
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5.发明公开Method and apparatus for reproducing a chrominance signal 失效Verfahren und Vorrichtung zum Wiedergeben eines Chrominanzsignals。
公开(公告)号：EP0140716A2
公开(公告)日：1985-05-08
申请号：EP84307529.2
申请日：1984-11-01
IPC分类号： H04N9/83
CPC分类号： H04N9/8707 , H04N9/831
摘要： A low-range-converted carrier chrominance signal (C L ) is demodulated (17) and a base-band signal is passed through a holding circuit and a comb filter (18a, 18b) in converting the low-range-converted carrier chrominance signal into a base-band chrominance signal or a carrier chrominance signal having a prescribed subcarrier frequency, for thereby removing an unwanted side band component and a crosstalk from adjacent tracks, which are produced upon demodulation, so that a low-pass or bandpass filter (21) for removing a side band produced by the conversion may be dispensed with or may have less strict characteristics. Furthermore, the carrier chrominance signal is generated by a means (22, 23, 24) for synchronising the low-range-converted chrominance signal (62) in phase with the low-range conversion carrier, sampling (16) the low-range-converted i chrominance signal with a first clock signal (eF c ) having a frequency which is a multiple of that of the low-range conversion carrier, converting the sampled data into two color difference signal sampled data (e, f) and synthesizing the two color difference signal sampled data (e, f) for issuance with a reference clock signal (4Fsc) which is n times the carrier frequency of the carrier chrominance signal. With this arrangement, the number of circuit components required is reduced and the circuit components can easily be made as a a semiconductor device.
摘要翻译： 低频变换载波色度信号（CL）被解调（17），并且基带信号通过保持电路和梳状滤波器（18a，18b），以将低范围转换的载波色度信号转换成 具有规定副载波频率的基带色度信号或载波色度信号，从而去除在解调时产生的不需要的边带分量和来自相邻轨道的串扰，使得低通或带通滤波器（21） 用于去除由转换产生的边带可以省去或可能具有较不严格的特性。 此外，载波色度信号由用于使低范围转换的色度信号（62）与低范围转换载波相位同步的装置（22,23,24）产生，采样（16）低范围转换色度信号 将具有频率为低倍范围转换载波倍数的频率的第一时钟信号（eFc）转换成色度信号，将采样数据转换成两个色差信号采样数据（e，f），并合成两个色差 信号采样数据（e，f），用于发出与载波色度信号的载波频率的n倍的参考时钟信号（4Fsc）。 利用这种布置，减少了所需的电路部件的数量，并且可以容易地将电路部件制成半导体器件。
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公开(公告)号：EP0621578A2
公开(公告)日：1994-10-26
申请号：EP94106025.3
申请日：1994-04-19
IPC分类号： G09G3/36
CPC分类号： G09G3/3625
摘要： A driving apparatus for a liquid crystal display of a type sandwiching a layer of liquid crystal material capable of responding to a voltage of an effective value applied between row and column electrodes. The apparatus includes an image data buffer memory for storing and outputting a digital image data of one frame, transferred from an external circuit, in the form of an image data matrix; a matrix generator for outputting data having a predetermined orthogonal matrix; a converter for converting the image data with the use of the orthogonal matrix into an converted data matrix and for outputting the converted data matrix; a converted data buffer memory for storing and outputting the converted data matrix; a driver for driving the liquid crystal display in synchronism with a row signal, which applies the orthogonal matrix to the row electrodes of the liquid crystal display, and also a column signal which applies the converted data matrix to the column electrodes of the liquid crystal display.
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公开(公告)号：EP0197767A2
公开(公告)日：1986-10-15
申请号：EP86302468.3
申请日：1986-04-03
IPC分类号： H04N5/91
摘要： A video signal processing apparatus incorporates a 1 H or 2H (H: horizontal synchronization period) delay circuit (3). The output of the delay circuit (3) is fed back to the input thereof so as to average the noise, thus raising the signal S/N ratio. The feedback line includes a nonlinear processing circuit (8) with a small gain when the signal input has a low vertical correlation, whereby the signal S/N ratio is improved without causing delay of the colour signal in the vertical direction nor deterioration of resolution of the luminance signal.
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公开(公告)号：EP0185474A1
公开(公告)日：1986-06-25
申请号：EP85308535.5
申请日：1985-11-25
发明人： Matsumoto, Tokikazu
IPC分类号： H04N9/80
CPC分类号： H04N9/87
摘要： A video signal processing apparatus for use in a video tape recorder of the PAL system obtains a composite video signal without causing a vertical colour shift on a display screen which would normally be caused by a time difference between a chrominance signal and a luminance signal. The apparatus comprises a 1H delay circuit (1) for delaying an input luminance signal by one horizontal synchronizing period (1H), an operational circuit (12), a 2H comb filter (10) that passes an input chrominance signal, and an adder circuit (5) for adding an output signal of the operational circuit (12) and an output signal of the 2H comb filter (10) thereby to obtain the composite video signal. The operational circuit (12) allows an output signal of the 1H delay circuit to pass therethrough when a difference in level between the input luminance signal and the output signal of the 1H delay circuit is large, and, when the difference is small, outputs a sum of the two signals.
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公开(公告)号：EP0140716A3
公开(公告)日：1986-06-25
申请号：EP84307529
申请日：1984-11-01
IPC分类号： H04N09/83
CPC分类号： H04N9/8707 , H04N9/831
摘要： A low-range-converted carrier chrominance signal (C L ) is demodulated (17) and a base-band signal is passed through a holding circuit and a comb filter (18a, 18b) in converting the low-range-converted carrier chrominance signal into a base-band chrominance signal or a carrier chrominance signal having a prescribed subcarrier frequency, for thereby removing an unwanted side band component and a crosstalk from adjacent tracks, which are produced upon demodulation, so that a low-pass or bandpass filter (21) for removing a side band produced by the conversion may be dispensed with or may have less strict characteristics. Furthermore, the carrier chrominance signal is generated by a means (22, 23, 24) for synchronising the low-range-converted chrominance signal (62) in phase with the low-range conversion carrier, sampling (16) the low-range-converted i chrominance signal with a first clock signal (eF c ) having a frequency which is a multiple of that of the low-range conversion carrier, converting the sampled data into two color difference signal sampled data (e, f) and synthesizing the two color difference signal sampled data (e, f) for issuance with a reference clock signal (4Fsc) which is n times the carrier frequency of the carrier chrominance signal. With this arrangement, the number of circuit components required is reduced and the circuit components can easily be made as a a semiconductor device.
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