公开(公告)号：US07403175B1

公开(公告)日：2008-07-22

申请号：US10969494

申请日：2004-10-19

Applicant: James C. Dunphy ,  William Cummings ,  Christopher J. Spindt ,  Ronald L. Hansen ,  Jun (Gordon) Liu ,  Lee Cressi ,  Colin Stanners

Inventor： James C. Dunphy ,  William Cummings ,  Christopher J. Spindt ,  Ronald L. Hansen ,  Jun (Gordon) Liu ,  Lee Cressi ,  Colin Stanners

IPC: G09G3/22

CPC classification number: G09G3/22 ,  G09G2320/0233 ,  G09G2320/0285

Abstract: Methods for compensating for brightness variations in a field emission device. In one embodiment, a method and system are described for measuring the relative brightness of rows of a field emission display (FED) device, storing information representing the measured brightness into a correction table and using the correction table to provide uniform row brightness in the display by adjusting row voltages and/or row on-time periods. A special measurement process is described for providing accurate current measurements on the rows. This embodiment compensates for brightness variations of the rows, e.g., for rows near the spacer walls. In another embodiment, a periodic signal, e.g., a high frequency noise signal, is added to the row on-time pulse in order to camouflage brightness variations in the rows near the spacer walls. In another embodiment, the area under the row on-time pulse is adjusted to provide row-by-row brightness compensation based on correction values stored in a memory resident correction table. In another embodiment, the brightness of each row is measured and compiled into a data profile for the FED. The data profile is used to control cathode burn-in processes so that brightness variations are corrected by physically altering the characteristics of the emitters of the rows.

Abstract translation: 补偿场致发射装置的亮度变化的方法。 在一个实施例中，描述了用于测量场发射显示（FED）装置的行的相对亮度的方法和系统，将表示测量的亮度的信息存储到校正表中，并且使用校正表在显示器中提供均匀的行亮度 通过调整行电压和/或行导通时间周期。 描述了一种特殊的测量过程，用于在行上提供精确的电流测量。 该实施例补偿行的亮度变化，例如用于靠近隔离壁的行。 在另一个实施例中，周期性信号，例如高频噪声信号，被添加到行准时脉冲，以伪装靠近隔离壁的行中的亮度变化。 在另一实施例中，根据存储在存储器驻留校正表中的校正值，调整行导通时间脉冲之下的面积以提供逐行亮度补偿。 在另一个实施例中，测量每行的亮度并将其编译成用于FED的数据简档。 数据轮廓用于控制阴极老化过程，从而通过物理地改变行的发射器的特性来校正亮度变化。

公开(公告)号：US06822628B2

公开(公告)日：2004-11-23

申请号：US09895985

申请日：2001-06-28

Applicant: James C. Dunphy ,  William Cummings ,  Christopher J. Spindt ,  Ronald L. Hansen ,  Jun (Gordon) Liu ,  Lee Cressi ,  Colin Stanners

Inventor： James C. Dunphy ,  William Cummings ,  Christopher J. Spindt ,  Ronald L. Hansen ,  Jun (Gordon) Liu ,  Lee Cressi ,  Colin Stanners

IPC: G09G322

CPC classification number: G09G3/22 ,  G09G2320/0233 ,  G09G2320/0285

Abstract: Methods for compensating for brightness variations in a field emission device. In one embodiment, a method and system are described for measuring the relative brightness of rows of a field emission display (FED) device, storing information representing the measured brightness into a correction table and using the correction table to provide uniform row brightness in the display by adjusting row voltages and/or row on-time periods. A special measurement process is described for providing accurate current measurements on the rows. This embodiment compensates for brightness variations of the rows, e.g., for rows near the spacer walls. In another embodiment, a periodic signal, e.g., a high frequency noise signal, is added to the row on-time pulse in order to camouflage brightness variations in the rows near the spacer walls. In another embodiment, the area under the row on-time pulse is adjusted to provide row-by-row brightness compensation based on correction values stored in a memory resident correction table. In another embodiment, the brightness of each row is measured and compiled into a data profile for the FED. The data profile is used to control cathode burn-in processes so that brightness variations are corrected by physically altering the characteristics of the emitters of the rows.

Abstract translation: 补偿场致发射装置的亮度变化的方法。 在一个实施例中，描述了用于测量场发射显示（FED）装置的行的相对亮度的方法和系统，将表示测量的亮度的信息存储到校正表中，并且使用校正表在显示器中提供均匀的行亮度 通过调整行电压和/或行导通时间周期。 描述了一种特殊的测量过程，用于在行上提供精确的电流测量。 该实施例补偿行的亮度变化，例如用于靠近隔离壁的行。 在另一个实施例中，周期性信号，例如高频噪声信号，被添加到行准时脉冲，以伪装靠近隔离壁的行中的亮度变化。 在另一实施例中，根据存储在存储器驻留校正表中的校正值，调整行导通时间脉冲之下的面积以提供逐行亮度补偿。 在另一个实施例中，测量每行的亮度并将其编译成用于FED的数据简档。 数据轮廓用于控制阴极老化过程，从而通过物理地改变行的发射器的特性来校正亮度变化。