Electronic keyboard template

Details Electronic keyboard template Electronic keyboard template

1991-05-13

1993-01-19

Yusko, Donald J.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

341 22, 341 23, 3647091, 36470914, 36470915, 340711, G09G 300

Patent

active

051810298

ABSTRACT:
An electronic keyboard template for use with software applications programs is responsive to command signals transmitted by designated function keys on a computer keyboard. The template includes an LCD display screen for displaying icons representative of operations performed by the function keys, control circuitry, and driving circuitry for generating the display of the icons on the LCD screen. In a preferred embodiment, the control circuitry includes a microprocesor, a Random-Access-Memory, and a digital Look-Up-Table, and the driving circuitry comprises a matrix driver and a refresh sequencer. The driving circuitry may further include a DC-to-DC convertor, and a plurality of shift registers for energizing pixel locations designated within a grid system on the LCD screen. In an alternative embodiment, the control circuitry may be external to the template (e.g., within the keyboard).

REFERENCES:
patent: 4870604 (1989-09-01), Tatsuno
patent: 4890832 (1990-01-01), Komaki
patent: 4908612 (1990-03-01), Bromley et al.
patent: 5080516 (1992-01-01), Ward
Microsoft Corporation, Microsoft.RTM. GW-Basic.RTM. Interpreter User's Guide, 1986, pp. 33-34.

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