公开(公告)号：US3625591A

公开(公告)日：1971-12-07

申请号：US3625591D

申请日：1969-11-10

Applicant: IBM

Inventor： FREISER MARVIN J ,  HALLER IVAN

IPC: G02F1/137 ,  G02F1/26

CPC classification number: G02F1/1375 ,  Y10T428/10

Abstract: An electro-optical display device employing a cell comprising a nematic liquid between two glass plates whose inner surfaces have been coated with transparent electrodes. Such coated electrodes are rubbed with a cloth or filter paper so that the liquid crystal film becomes oriented along the direction of rubbing. Such film will be homogeneous and strongly birefringent so that when an electric field is applied to the electrodes of the cell and the latter is viewed between crossed polarizers, a marked contrast in light between the quiescent and active states, respectively, of the cell is observed, even in the presence of ambient illumination of the cell.

公开(公告)号：US3895373A

公开(公告)日：1975-07-15

申请号：US47720474

申请日：1974-06-07

Applicant: IBM

Inventor： FREISER MARVIN J ,  TEANEY DALE T

IPC: G02F1/133 ,  G09G3/36 ,  H04N5/74 ,  G08B5/36

CPC classification number: G09G3/3622

Abstract: A method and apparatus for selectively exciting a matrix of voltage responsive devices in which each of said device is responsive to a voltage difference between a row and column drive line. A plurality of row and column drive lines are fed with an AC voltage, the phases of said voltage on said column drive lines being different from the phases on said row drive lines. A device is selectively excited by adjusting the phase of voltage on the row and column drive lines, associated with said selected device, to be equal to each other, and different from either the phases on other column or other row drive lines. The three different phases of voltage available (one on unselected columns, another on unselected rows, the third on the selected row and column) differ in increments of 2 pi /3. In this manner the voltage across a selected device can be reduced to zero without affecting the amplitude of voltage applied to any other device.

Abstract translation: 一种用于选择性地激励电压响应装置的矩阵的方法和装置，其中每个所述装置响应于行和列驱动线之间的电压差。 多个行和列驱动线被馈送有AC电压，所述列驱动线上的所述电压的相位与所述行驱动线上的相位不同。 通过将与所选择的装置相关联的行和列驱动线上的电压的相位彼此相等地选择性地激励器件，并且不同于其它列或其它行驱动线上的相。 电压可用的三个不同阶段（一个在未选择的列，另一个在未选择的行上，第三个在所选行和列上）以2 pi / 3的增量不同。 以这种方式，所选器件上的电压可以减小到零，而不影响施加到任何其他器件的电压的幅度。

公开(公告)号：US3114895A

公开(公告)日：1963-12-17

申请号：US13647761

申请日：1961-09-07

Applicant: IBM

Inventor： FREISER MARVIN J ,  SWIHART JAMES C

IPC: G11C11/44

CPC classification number: G11C11/44 ,  Y10S505/834