Keyboard with flexible display and prompt capability

• US 6,067,074 A
• Filed: 08/19/1994
• Issued: 05/23/2000
• Est. Priority Date: 08/27/1986
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Lueders, William R.
• Primary Examiner(s): Hjerpe, Richard A.
• Application Number:
  US08/293,104
• Time in Patent Office: 2,104 Days
• Field of Search: 345/173, 345/174, 345/175, 345/172, 345/168, 345/104, 345/156, 345/157, 345/87, 345/179, 345/102, 341/23, 178/18.01, 178/18.03, 178/18.05-18.08, 349/41, 349/122
• US Class Current: 345/156
• CPC Class Codes: G06F 3/0238 Programmable keyboards key guide holders G06F3/0224
• CPC Class Codes: H01H 13/702 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
• CPC Class Codes: H01H 2201/02 Piezo element
• CPC Class Codes: H01H 2217/026 Pencil operated
• CPC Class Codes: H01H 2219/012 programmable
• CPC Class Codes: H01H 2219/018 Electroluminescent panel
• CPC Class Codes: H01H 2239/004 High frequency adaptation or shielding

Abstract

A keyboard (10) is disclosed including a flexible display membrane (36) overlying a plurality of pressure-responsive switches (28). The display membrane (36) can be electrically addressed to display location indicia (48) indicating the position of an underlying switch (46), and functional indicia (50) indication the function of the key (46). Informational text (58) can also be displayed on the flexible display (36) indicating the choice of switches to effect a desired function. An interactive exchange of information between the keyboard user and a processing system (14) can be achieved to accomplish a desired function. Graphical information can be input to the processing system (14) by an array (90) of pressure-responsive elements (91). Graphics input by the array (90) can be reproduced on an overlying portion (96) of the flexible display membrane (36).

Claims

1. A programmable processing system, comprising:

a keyboard having a plurality of switches, each individually operable to generate electrical indication of its operations and wherein each is individually operable to perform multiple functions;

a flexible, continuous programmable template display membrane having electrical connections for addressing display elements to be illuminated, wherein said membrane covers said switches; and

a processor electrically connected to said keyboard and to said membrane for displaying on said display membrane positional indicia of desired ones of said switches, and for displaying on said display membrane functional indicia of the function of desired ones of said switches.

2. The processing system of claim 1 wherein said processor is programmed for displaying on said template display membrane prompt text for giving the user of said system a choice of operations between at least two switches to effect a desired function to be performed.

3. The processing system of claim 1 wherein said processor is programmed to locate only those switches which are necessary to accomplish a desired function.

4. The processing system of claim 3 wherein said processor is programmed to display new switch locations and functions in response to the selection and actuation by the user of one said switch.

5. A method of providing interactive communications between a user of a keyboard having a programmable display membrane covering an array of pressure sensitive keys, and a processing system in order to complete a task which includes plural functions, comprising the steps of:

displaying on the programmable display membrane of the keyboard the location and function of keys to be used to effect a first desired function;

generating data from the keyboard indicating actuation of keyboard keys;

receiving said data at the processing system;

displaying new information on the programmable display membrane of the keyboard in response to said data, said displayed new information indicating the location and function of keys to be used to effect a second desired function, the keys being programmable such that a single key may perform an unlimited number of functions;

displaying the informational text on the programmable display membrane of the keyboard at continuous locations including locations between keys as well as overlying keys not used to effect the currently desired function; and

repeating the steps of generating and receiving data and displaying new key locations and functions until the task has been completed.