公开(公告)号：EP0772297B1

公开(公告)日：2001-02-28

申请号：EP96307757.3

申请日：1996-10-25

Applicant: STMicroelectronics Limited

Inventor： Mellot, Pascal

IPC: H03K5/156

CPC classification number: H03K5/1565

公开(公告)号：EP1615112A1

公开(公告)日：2006-01-11

申请号：EP04254079.9

申请日：2004-07-07

Applicant: STMicroelectronics Limited ,  STMicroelectronics S.A.

Inventor： Raynor, Jeffrey ,  Mellot, Pascal

IPC: G06F3/033

CPC classification number: G06F3/0317

Abstract: An optical mouse has an image sensor (12) providing image data via an ADC (14) to a correlation circuit (16) and a motion estimation circuit (18) to provide output signals representative of mouse motion. The output signals are disabled when the mouse is lifted away from the working surface. This is achieved by summing each frame, after filtering in a high-pass filter (22), in a summer (26) to provide a single value, and comparing this with a threshold. If the filtered and summed value exceeds the threshold, this indicates that the image contains in-focus objects, and thus that the mouse is on the working surface.

Abstract translation: 光学鼠标具有经由ADC（14）向相关电路（16）和运动估计电路（18）提供图像数据以提供代表鼠标运动的输出信号的图像传感器（12）。 当鼠标从工作表面抬起时，输出信号被禁用。 这通过在高通滤波器（22）中滤波之后，在夏季（26）中对每个帧求和以提供单个值，并将其与阈值进行比较来实现。 如果过滤和求和值超过阈值，则表示图像包含对焦对象，因此鼠标位于工作表面上。