Bar graph type touch switch and display device

• US 4,121,204 A
• Filed: 12/14/1976
• Issued: 10/17/1978
• Est. Priority Date: 12/14/1976
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Serrano, Juan de J., Welch, Stanley B., Chen, David Y.
• Primary Examiner(s): Trafton, David L.
• Application Number:
  US05/750,559
• Time in Patent Office: 672 Days
• Field of Search: 340/337, 340/365 C, 340/378 R, 361/288, 361/181, 307/116, 200/5 A
• US Class Current: 345/174
• CPC Class Codes: F24C 7/082 on ranges, e.g. control panels, illumination
• CPC Class Codes: H03K 17/962 Capacitive touch switches
• CPC Class Codes: H03K 2217/96066 Thumbwheel, potentiometer, scrollbar or slider simulation by touch switch
• CPC Class Codes: H03K 2217/96076 with spring electrode
• CPC Class Codes: H05B 1/0266 Cooktops

Abstract

A user input/output device comprises a lighted, segmented bar graph type display and an array of light transmitting touch sensitive areas superimposed over the bar graph display. A suitable circuit means is responsive to the touch sensitive areas and connected for driving the segments of the bar graph such that when any one of the touch sensitive areas is touched, a corresponding display segment and all display segments to one side are energized and the remaining display elements are de-energized.

Claims

1. A touch switch and display device comprising:

a linear array of display segments strung out such that each segment is adjacent to no more than two other segments, said display segments adapted to be progressively energized to form a bar graph type display to represent a numerical quantity;

a linear array of light transmitting touch sensitive areas superimposed over said linear array of display segments; and

circuit means responsive to said touch sensitive areas and connected for energizing said display segments such that when any one of said touch sensitive areas is touched, a corresponding display segment and all display segments to one side are energized, and the remaining display segments are de-energized.

2. A device according to claim 1, wherein said touch sensitive areas are superimposed in a one-for-one relationship over said display segments.

3. A device according to claim 1, wherein said display segments are arranged in a straight line.

4. A touch control bar graph device comprising:

a dielectric panel including a transparent window area;

a linear array of light transmitting touch sensitive areas mounted on said panel over said window area, said array of touch sensitive areas being formed of a linear array of capacitive touch switches disposed on said panel, each of said touch switches including a transparent touch pad applied to the front side of said panel over said window area and a rear pad applied to the rear side of said panel in at least partially overlapping relationship with said touch pad so said touch pad and said rear pad form the two plates of a capacitor;

a linear array of display segments mounted behind said panel and positioned so as to be visible through said window area, said array of display segments strung out such that each segment is adjacent to no more than two other segments, and said display segments adapted to be progressively energized to form a bar graph type display to represent a numerical quantity; and

circuit means connected to said rear touch switch pads and responsive to said touch sensitive areas for driving said display segments such that when any one of said touch sensitive areas is touched, a corresponding display segment and all display segments to one side are energized, and the remaining display segments are de-energized.