Title:
TRACK BALL
Document Type and Number:
Japanese Patent JP3204237
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the durability of a track ball and to make the ball free from maintenance.
SOLUTION: An infrared sensor part 1 is constituted so that plural infrared sensor cells are arranged in a semispherical base at equal interval. Each infrared sensor cell detect infrared rays from a human body when a hand touches it. An interface part 2 obtains a moving direction and moving speed based on the change vector of the detection position distribution of a part which the hand touches in the infrared sensor part 1 and transmits them to a computer 4 through a connected serial interface 5 as the shift of X/Y-axes or a Z-axis.
Inventors:
Naotada Matsudaira
Application Number:
JP1409199A
Publication Date:
September 04, 2001
Filing Date:
January 22, 1999
Export Citation:
Assignee:
NEC
International Classes:
G06F3/033; G06F3/03; G06F3/0354; G06F3/041; G06F3/042; (IPC1-7): G06F3/033; G06F3/03
Domestic Patent References:
| JP7295738A | ||||
| JP1153102A | ||||
| JP1191923A | ||||
| JP5282093A | ||||
| JP7175584A | ||||
| JP10222292A | ||||
| JP11288355A |
Attorney, Agent or Firm:
Kaneyuki Matsuura