Keyboard

• US 5,627,566 A
• Filed: 12/06/1993
• Issued: 05/06/1997
• Est. Priority Date: 06/06/1991
• Status: Expired due to Fees

• Current Assignee: Dietmar Litschel
• Original Assignee: Dietmar Litschel
• Inventors: Litschel, Dietmar
• Primary Examiner(s): SARAS, STEVEN J
• Application Number:
  US08/157,169
• Time in Patent Office: 1,247 Days
• Field of Search: 345/168, 345/174, 345/169, 345/172, 345/156, 341/22, 341/21, 341/34, 178/18, 400/473, 400/477, 400/483, 400/489, 400/87, 400/100, 400/485, 200/5 A, 200/5 R, 434/112-117, 84/743
• US Class Current: 345/168
• CPC Class Codes: B41J 5/10 Arrangements of keyboards , e.g. key button disposition
• CPC Class Codes: G06F 3/0234 using switches operable in different directions
• CPC Class Codes: G09B 21/001 Teaching or communicating with blind persons G09B21/02 - G09B21/06 take precedence
• CPC Class Codes: H01H 13/84 characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback legends H01H13/83
• CPC Class Codes: H01H 2003/0293 with an integrated touch switch
• CPC Class Codes: H01H 2217/032 Feedback about selected symbol, e.g. display

Abstract

A keyboard apparatus having keys selectively interacting with actuation members to provide a preliminary evaluation of a character before actual input of the character is disclosed in one preferred embodiment of the present invention as including at least one key, a triggering unit operably disposed in connection with the key, and sensors arranged on the key. Preferably, the key of the present invention includes at least two selectively actuated sensors which interact with a device, such as, for example, a display or an acoustic indicating arrangement, for generating sound or visible output signals, whereby each sensor generates a different signal. In operation, a response behavior is provided by actuation of the sensors which is different from that of the triggering unit in order to make it possible to provide a preliminary display of the signal before a final input of the signal is triggered.

Claims

1. Keyboard comprising at least one key providing more than one reproducible character, a triggering unit operably disposed in connection with the key, and sensors arranged on the key, said key having at least two selectively actuated sensors, wherein each sensor generates at least one unique signal, each of said signals representative of one of said reproducible characters, said sensors interacting with a device for displaying said signals, and whereby a response behavior of an actuation of the sensors is different from that of the triggering unit to provide means for displaying one of said unique signals before a final triggering of a final signal by means of actuating said triggering unit.

2. Keyboard according to claim 1, characterized in that the sensors and the triggering unit comprise different actuation pressures.

3. Keyboard according to claim 1, characterized in that the sensors and the triggering unit comprise different actuation speeds.

4. Keyboard according to claim 1, characterized in that the sensors and the triggering unit comprise different actuation directions.

5. Keyboard according to claim 1, characterized in that the sensors and the triggering unit comprise different staying durations in an actuation.

6. Keyboard according to claim 1, characterized in that the triggering unit comprises means for delivery of an impulse at an end of an actuation of the key.

7. Keyboard according to claim 1, wherein said device comprises a monitor, said monitor displaying said reproducible character which corresponds to the key touched by a user, there preferably occurring a gating of the character into a display window.

8. Keyboard according to claim 1, wherein said device comprises an acoustic indicating arrangement for representing said reproducible character which corresponds to the key touched by a user.

9. Keyboard according to claim 1, further comprising a storage unit for text components, abbreviations or the like, which on actuation of the sensor of said key brings into display various text components allocated to the key, which are then selectable by actuation of a further key.

10. Keyboard according to claim 1, characterized in that the triggering unit can display different signals in dependence selectively on pressure or speed of an actuation.

11. Keyboard according to claim 1, wherein said reproducible character is selected from a plurality of optional characters associated with said sensors.

12. Keyboard according to claim 11, wherein said optional characters are selected by a user from a group consisting of letters, numerals, braille points, symbols, or command functions.

13. Keyboard as in any of claims 1-6 or 8, further comprising a generation of braille characters of an eight-point braille structure, wherein twelve keys are provided, of which eight of the keys are provided for a generation of individual points and four of the keys are provided for a generation of point pairs.

14. Keyboard according to claim 13, further comprising twelve keys arranged in four rows, in each row there being arranged two keys for the generation of an individual point each, as well as a further key for the generation of a point pair composed from these points.

15. Keyboard as in any of claims 1-6 or 8, further comprising twelve keys, four of said twelve keys including three actuation possibilities.

16. Keyboard as in any of claims 1-6 or 8, further comprising a generation of a six-point braille script including nine keys arranged in three rows.