Method for switching keypad
Filing Information
- Patent Number: US6445381
- Application Number: US9521779
- Filing date: 03/09/2000
- Issue date: 09/03/2002
- Predicted expiration date: 03/09/2020
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analyzing 100 million+ documents to uncover your network...- U.S. Classifications: 345/168 · 345/170 · 345/156 · 345/172 · 341/22 ·
- International Classifications: --
- International Classifications: 345168 · 345170 · 345156 · 345172 · 341 26 · 341 22 · 341175 · 710100 ·
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Abstract
A method for switching a keypad is to adopt an externally coupled keypad to a personal computer, wherein a switching program for switching between a hot-key function and a Num Lock function is programmed in a microprocessor of the keypad; when a hot-key or a Num Lock key is pressed, the hot-key function or the Num Lock function is enabled. Besides, every key of the keypad is printed with a figure and a symbol for performing at least two functions.References Cited
U.S. Patent Documents
| Document Number | Assignees | Inventors | Issue/Pub Date |
|---|---|---|---|
| US6011495* | Silitek Corporation | Chen | Jan 2000 |
| US6084576* | Leu et al. | Apr 2000 | |
| US6070204* | Intel Corporation | Poisner | May 2000 |
| US6181262* | Gateway, Inc. | Bennett | Jan 2001 |
Referenced By
| Document Number | Assignee | Inventors | Issue/Pub Date |
|---|---|---|---|
| US6862017 | Richard Chen | Mar 2005 | |
| US6545668 | Fujitsu Takamisawa Component Ltd. | Masanobu Hayama | Apr 2003 |
| US7499032 | Peter J. Mikan | Mar 2009 | |
| US6876312 | Behavior Tech Computer Corporation | Ching-Chiang Yu | Apr 2005 |
| US7020270 | GHASSABIAN FIROOZ | Firooz Ghassabian | Mar 2006 |
| US6909423 | ORtek Technology, Inc. | Yen-Chun Wu et al. | Jun 2005 |
| US7117279 | Lite-On Technology Corporation | Chin Ping Wang et al. | Oct 2006 |
| US7515137 | Intel Corporation | Edward O. Clapper | Apr 2009 |
Patent Family
The current document is not in a family.Independent Claims | See all claims (5)
- 1. A method for switching a numeric keypad having a switching program programmed in a microprocessor of the keypad for switching keys in the keypad between one of three functions: a hot-key function, a Num Lock function, and a normal key function, the method comprising: a) scanning keys of the numeric keyboard, memorizing whether a hot-key or a Num Lock key has been pressed and, if any key in the keypad is pressed, reading the key address; b) judging whether said hot-key is pressed or not after confirmation of the key address and, if pressed, sending out a hot-key code and enabling said hot-key function or judging whether said Num Lock key is pressed; and c) sending out a Num Lock figure code if said Num Lock key is pressed, otherwise, sending out a normal key code.
