Variable color display system

• US 5,656,935 A
• Filed: 12/12/1995
• Issued: 08/12/1997
• Est. Priority Date: 01/15/1986
• Status: Expired due to Fees

• Current Assignee: Texas Digital Systems, Inc. (NCR Voyix Corporation)
• Original Assignee: Texas Digital Systems, Inc. (NCR Voyix Corporation)
• Inventors: Havel, Karel
• Primary Examiner(s): Karlsen, Ernest F.
• Application Number:
  US08/571,246
• Time in Patent Office: 609 Days
• Field of Search: 324/115, 324/99 D, 324/96, 324/132, 345/83, 345/88, 345/150
• US Class Current: 324/115
• CPC Class Codes: G01R 13/02 for displaying measured electric variables in digital form
• CPC Class Codes: G01R 13/26 Circuits for controlling the intensity of the electron beam or the colour of the display
• CPC Class Codes: G01R 13/405 using a plurality of active, i.e. light emitting, e.g. electro-luminescent elements, i.e. bar graphs
• CPC Class Codes: G01R 15/125 for digital multimeters
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/14 Semiconductor devices, e.g. diodes

Abstract

A variable color display system exhibits a display unit in a color in accordance with the value of a limit. The color signals are developed in accordance with the value of the limit and applied to a color control input of the display system to control its color substantially continuously.

Claims

1. A display system comprising:

a display device for exhibiting a display unit in a variable color, said display device including a color control input for substantially continuously controlling color of said display unit;

means for developing by a continuously variable color technique a color control signal in accordance with a relation of said display unit to a limit;

means for applying said color control signal to said color control input for controlling color of said display unit.

2. A display system comprising:

a display device for exhibiting in a variable color an indication of a value of a signal, said display device including a color control input for substantially continuously controlling color of said indication;

means for developing by a continuously variable color technique a color control signal in accordance with a relation of said value to a limit;

means for applying said color control signal to said color control input for controlling color of said indication.

3. A display system comprising:

a display device for exhibiting in a variable color a digital indication of a value of a signal, said display device including a color control input for substantially continuously controlling color of said digital indication;

means for developing by a continuously variable color technique a color control signal in accordance with a relation of said value to a limit;

means for applying said color control signal to said color control input for controlling color of said digital indication.