公开(公告)号：WO1991002235A1

公开(公告)日：1991-02-21

申请号：PCT/JP1989000758

申请日：1989-07-27

Applicant: SEIKO INSTRUMENTS INC. ,  TAKEDA, Haruo ,  NAKAMURA, Nobutaka ,  TAKE, Masafumi

Inventor： SEIKO INSTRUMENTS INC.

IPC: G01N19/00

CPC classification number: G01N11/00

Abstract: The force of a sinusoidal wave is applied to a sample to measure the phase difference on how much the deformation of the sample is lagged behind the force that is applied. For this purpose, the device comprises the sample, a force generator, a timing circuit, a zero-cross detector, a t1 measuring instrument, a t2 measuring instrument, and a phase difference calculating device. The phase difference calculating device calculates a correction using a time t1 (phase difference containing error) from a zero-cross point of a sinusoidal wave of the force measured by the t1 measuring instrument to a zero-cross point of the deformation of the sample, and a time t2 from a zero-cross point of the deformation of the sample measured by the t2 measuring instrument to a next zero-cross point. The phase difference is correctly found even when the zero-cross point is shifted as a result of superposition of DC components on the deformation of the sample due to deformation by thermal expansion and creep phenomenon.

Abstract translation: 将正弦波的力施加到样品上以测量样品的变形滞后于施加的力的相位差。 为此，该装置包括样品，力发生器，定时电路，零交叉检测器，t1测量仪器，t2测量仪器和相位差计算装置。 相位差计算装置使用由t1测量仪器测量的力的正弦波的零交叉点到样品的变形的零交叉点，使用时间t1（相位差包含误差）进行校正， 以及从由t2测量仪器测量的样品的变形的零交叉点到下一个零交叉点的时间t2。 即使当由于热膨胀和蠕变现象导致的样品的变形引起的直流分量的叠加导致零交叉点偏移时，相位差也被正确地发现。

公开(公告)号：WO1999031877A1

公开(公告)日：1999-06-24

申请号：PCT/JP1997004588

申请日：1997-12-12

Applicant: HITACHI, LTD. ,  YAMASAKI, Masami ,  TAKEDA, Haruo

Inventor： HITACHI, LTD.

IPC: H04N05/74

CPC classification number: H04N9/3147 ,  H04N9/12

Abstract: A multi-projection image display device using a plurality of image projectors to form one picture on a screen, in which images projected from the projectors are smoothly connected with one another, so that seams of the images do not appear conspicuously. The image display device has projectors (0121, 0122, 0123, 0124) and a screen (0140) laid out in such a manner that maximum image projection ranges (0151, 0152, 0153, 0154) of the respective projectors ovelap the adjacent ranges. An image signal control unit (0110) for processing an image signal supplied from an external image input (0180) has, therein, a member for cutting out a partial image area dealt with by each projector, an image converting member for performing geometric transformation and local color correction of the partial image, and an arithmetic control member for controlling the image converting member on the basis of image information inputted from a screen state monitor camera (0130). With this structure, smoothing of the seams between the images may be realized simply by image signal processing, and precise adjustment of the optical system of the projectors becomes unnecessary.

Abstract translation: 一种多投影图像显示装置，其使用多个图像投影仪在屏幕上形成一个图像，其中从投影仪投影的图像彼此平滑地连接，使得图像的接缝不显着。 图像显示装置具有投影仪（0121，0122，0123，0124）和以相应投影仪的最大图像投影范围（0151,022,033,0154）相邻范围的方式布置的屏幕（0140）。 一种用于处理从外部图像输入（0180）提供的图像信号的图像信号控制单元（0110），其中具有用于切割由每个投影仪处理的部分图像区域的部件，用于执行几何变换的图像转换部件， 部分图像的局部颜色校正，以及用于基于从屏幕状态监视摄像机（0130）输入的图像信息来控制图像转换部件的运算控制部件。 利用这种结构，可以简单地通过图像信号处理来实现图像之间的接缝的平滑化，并且不需要投影仪的光学系统的精确调整。