公开(公告)号：JPH0322125A

公开(公告)日：1991-01-30

申请号：JP14885290

申请日：1990-06-08

Applicant: APPLE COMPUTER

Inventor： POORU EMU DONOBUAN ,  SUUII TON CHIA

IPC: G06F3/038 ,  G06F3/023 ,  G06F3/048 ,  G09G5/08

Abstract: PURPOSE: To minimize the movement of a cursor by sampling the parts of an electric signal, which are temporarily discreted, by means of a cursor controller and executing respective samples in the designated section of the function of prediction speed in the movement of the cursor controller. CONSTITUTION: This cursor controller generates the electric signal expressing a position and at least two parts of the electric signal, which is temporarily discreted, are sampled. The respective samples are executed in a designated period and the designated period is the function of prediction speed in the movement of the cursor controller. The sampled parts are compared mutuallyt and with the precedingly sampled electric signal. Comparison is analyzed for deciding whether or not the signal is transmitted to a cursor so as to execute movement in the display of a computer controller. Thus, the 'jitter' of the cursor when the cursor controller is substantially still is minimized.

公开(公告)号：JPH03102215A

公开(公告)日：1991-04-26

申请号：JP13277790

申请日：1990-05-24

Applicant: APPLE COMPUTER

Inventor： POORU EMU DONOBUAN

IPC: G01D5/36 ,  G06F3/038 ,  H03M1/00 ,  H03M1/24 ,  H03M1/30

Abstract: PURPOSE: To reduce the power consumption, by providing a freely positionable light shield means for opening and closing an optical path generated from a light source means to a light convergence and electric conduction means and synchronizing the light source means and the light convergence and electric conduction means in pulse. CONSTITUTION: A pulse input means 12 for generating a pulse-like electric signal is provided on a device 10, and connected to a light source means 14. A current limit resistor R and a light emitting diodes D1, D2 mutually connected in series are provided on the means 14, which is connected to a ground point 16. Two phototransistors PT1, PT2 are connected to the means 12. The optical paths of light beams 20, 22 generated from the diodes D1, D2 are opened and closed. Consequently, pulse output generated from the transistors PT1, PT2 which are a light convergence and electric conduction means is transmitted to an encoder 24, and utilized for encoding. Thus, since the means 14 and the transistors PT1, PT2 are synchronized in pulse, power consumption can be held minimum.