公开(公告)号：JPH0764048A

公开(公告)日：1995-03-10

申请号：JP12437294

申请日：1994-05-13

Applicant: SONY CORP

Inventor： NITO KEIICHI ,  YASUDA AKIO ,  KATAOKA NOBUE ,  TAKANASHI HIDEHIKO ,  MATSUI ERIKO ,  YOU EIHO ,  HIDE FUMIASA

IPC: G02F1/13 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/137 ,  G02F1/141 ,  G09G3/36

Abstract: PURPOSE:To enable high-speed wobbling (picture element shifting) and to efficiently attain higher resolution by combining a phase modulation optical element having spacings spacings filled with specific liquid crystals and an optically transparent double refractive medium. CONSTITUTION:This optical device consists of a combination of the phase modulation optical element in which with plural pieces of optically transparent base bodies provided with optically electrodes and oriented films in this order are arranged to face each other apart the prescribed spacings on the electrode and oriented film sides, and in which at least one kind of the liquid crystals selected from among a ferroelectric liquid crystal 3, antiferroelectric liquid crystal and smectic liquid crystal exhibiting an electric gradient effect are injected in the spacings, and the optically transparent double refractive medium 4. By this constitution, the phase of light is changed and the plane of polarization is shifted by the phase modulation optical element and further, incident light is selectively refracted by the double refractive medium 4 and, therefore, the discrete pixels are effectively wobbled. The resolution is thus improved and the image quality is improved as well.

公开(公告)号：JPH077705A

公开(公告)日：1995-01-10

申请号：JP17231793

申请日：1993-06-18

Applicant: SONY CORP

Inventor： MATSUI ERIKO ,  TAKANASHI HIDEHIKO ,  HIDE FUMIASA ,  KATAOKA NOBUE ,  YOU EIHO ,  NITO KEIICHI ,  YASUDA AKIO

IPC: H04N5/335 ,  H04N5/349 ,  H04N5/357 ,  H04N5/372 ,  H04N5/374 ,  H04N5/378 ,  H04N5/66

Abstract: PURPOSE:To obtain high contrast even for the use for a long time by applying a pulse with a specific width and voltage opposite in the polarity to a write pulse to the device just before the write pulse so as to execute electric field orientation processing thereby forming a uniform domain in each picture element of an electro-optic element. CONSTITUTION:An electric field orientation processing pulse EP of the opposite polarity to that of a write pulse WP is applied to a device having an electro- optic element in which a liquid crystal display is injected between opposite electrodes just before the application of the write pulse WP at a head of each field. The pulse width Pwb of the pulse EP and an absolute value Vb of an applied voltage are selected to satisfy the relation of Pwb>=Pwa and/or PwbXVb>PwaXVa, where Pwa is the pulse width of the write pulse WP and Va is an absolute value of the applied voltage. Thus, the write pulse is applied by a short pulse width or a low voltage and high contrast and high resolution are obtained at a low voltage.

公开(公告)号：JPH077704A

公开(公告)日：1995-01-10

申请号：JP17231593

申请日：1993-06-18

Applicant: SONY CORP

Inventor： NITO KEIICHI ,  YASUDA AKIO ,  TAKANASHI HIDEHIKO ,  MATSUI ERIKO ,  KATAOKA NOBUE ,  YOU EIHO ,  HIDE FUMIASA

IPC: G02F1/133 ,  G09G3/36 ,  H04N5/335 ,  H04N5/349 ,  H04N5/357 ,  H04N5/372 ,  H04N5/374 ,  H04N5/378 ,  H04N5/66

Abstract: PURPOSE:To attain low voltage drive and to improve the stability by repeating application of two positive pulses and two negative pulses succeeding to the positive pulses when an optical device having a liquid crystal cell is driven and selecting an absolute value of the 1st pulse larger than an absolute value of the 2nd pulse in the pulses of same polarity. CONSTITUTION:A display device 1 is composed of combination of a liquid crystal display element LCD 2, a ferroelectric liquid crystal display element LC 3 as a phase modulation optical element and a double refraction medium 4 comprising a crystal plate or the like. An output light 6 from the LCD 2 has a linearly polarized light and a wobbling element 7 comprising the FLC 3 and the medium 4 deviates picture elements. When the display device is driven, positive and negative pulses being the combination of a head pulse P of a high voltage and a low DC voltage are applied to the device repetitively. Thus, the pulse P contributes to high speed processing and the pulse DC is used for the adjustment of a cone angle, the device is driven at a low voltage and the electrochemical stability and the wobbling effect are improved.