Data input device

Details Data input device Data input device

1998-06-03

2000-08-01

Lao, Lun-Yi

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

345162, 345123, G09G 508

Patent

active

060973722

ABSTRACT:
In a data input device, an X-encoder 2 and a Y-encoder 3 are driven by a track ball 1 called a track ball and pulse outputs can be obtained from the respective encoders. Switches SW1, SW2, SW3 and SW4 are disposed around the track ball 1. When the track ball 1 is rolled about a Z-axis by a finger F while depressing a peripheral portion of the track ball 1 with the finger F, the finger F successively touches the switches SW1, SW2, SW3 and SW4. At the time, since the outputs from the X-encoder 2 and the Y-encoder 3 are converted into data on a Z-axis coordinate in response to the outputs from the switches, data about the Z-axis can be input. With this arrangement, the data input device can input Z-axis coordinate data which cannot be input by prior art track ball type data input devices.

REFERENCES:
patent: 4839805 (1989-06-01), Pearson, Jr. et al.
patent: 5404152 (1995-04-01), Nagai
patent: 5473344 (1995-12-01), Bacon et al.
patent: 5491497 (1996-02-01), Suzuki
patent: 5521617 (1996-05-01), Imai et al.
patent: 5771038 (1998-06-01), Wang
patent: 5917473 (1999-06-01), Yeh

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