公开(公告)号：US4641156A

公开(公告)日：1987-02-03

申请号：US650521

申请日：1984-09-14

申请人： Morio Ohta ,  Shizuo Tsuchiya ,  Yoshito Nakano ,  Masaru Aikawa ,  Seiji Asaumi

发明人： Morio Ohta ,  Shizuo Tsuchiya ,  Yoshito Nakano ,  Masaru Aikawa ,  Seiji Asaumi

IPC分类号： G01D15/14 ,  G06K15/12 ,  H04N1/036 ,  H04N1/193 ,  H04N1/40

CPC分类号： G01D15/14 ,  G06K15/1252 ,  H04N1/036 ,  H04N1/193 ,  H04N1/40025

摘要： In the recording apparatus of this invention, liquid crystal light shutter operates by using the double frequency drive. The double frequency drive utilizes signals of a high frequency f.sub.H and lower frequency f.sub.L. The dielectric anisotropy of liquid crystal matrial becomes positive in the case of the frequency f.sub.L lower than crossover frequency f.sub.C and becomes negative in the case of the frequency f.sub.H higher than the frequency f.sub.C. When the data signal including the signal of the frequency f.sub.L for a final period of a writing cycle Tw, is applied to write selection electrodes and data signal electrodes, liquid crystal light shutter is kept open for the final period of the writing cycle Tw, namely, opening or closing state of the shutter which is caused during a selection period can be eliminated.

摘要翻译： 在本发明的记录装置中，通过使用双频驱动来操作液晶光闸。 双频驱动采用高频fH和低频fL的信号。 在频率fL低于交越频率fC的情况下，液晶母线的介电各向异性变为正，在频率fH高于频率fC的情况下变为负。 当包含写入周期Tw的最后期间的频率f L的信号的数据信号被施加到写入选择电极和数据信号电极时，液晶光闸在写入周期Tw的最后期间保持打开，即 可以消除在选择期间引起的快门的打开或关闭状态。

公开(公告)号：US4614954A

公开(公告)日：1986-09-30

申请号：US649851

申请日：1984-09-12

申请人： Morio Ohta ,  Shizuo Tsuchiya ,  Yoshito Nakano ,  Masaru Aikawa ,  Seiji Asaumi

发明人： Morio Ohta ,  Shizuo Tsuchiya ,  Yoshito Nakano ,  Masaru Aikawa ,  Seiji Asaumi

IPC分类号： G01D15/14 ,  G06K15/12 ,  H04N1/036 ,  H04N1/193 ,  H04N1/40 ,  G01D9/42 ,  G01D15/06 ,  G02F1/13

CPC分类号： G06K15/1252 ,  G01D15/14 ,  H04N1/036 ,  H04N1/193 ,  H04N1/40025

摘要： In a recording apparatus of this invention, liquid crystal light shutter operates by using the double frequency drive. The double frequency drive employs a higher frequency f.sub.H and lower frequency f.sub.L. The dielectric anisotropy becomes positive in the case of the lower frequency f.sub.L than crossover frequency f.sub.C and becomes negative in the case of the higher frequency f.sub.H than the frequency f.sub.C of liquid crystal material. The driver circuit of liquid crystal light shutter includes a delay circuit (146). Both a recording data delayed through the delay circuit (146) and a recording data formed without going through the delayed circuit (146) are produced in an LSI, to be supplied to write selecting electrodes and signal electrodes of the liquid crystal light shutter, thereby driving the liquid crystal light shutter in a time sharing manner.

摘要翻译： 在本发明的记录装置中，液晶光闸通过使用双频驱动器进行操作。 双频驱动采用高频fH和较低频率fL。 在频率fL低于交越频率fC的情况下，介电各向异性变为正，在频率fH高于液晶材料的频率fC的情况下变为负。 液晶光闸的驱动电路包括延迟电路（146）。 在LSI中产生延迟通过延迟电路（146）的记录数据和不经过延迟电路（146）形成的记录数据，以提供给液晶光闸的写选择电极和信号电极，从而 以分时方式驱动液晶光闸。