Pattern display system

• US 4,360,804 A
• Filed: 04/07/1980
• Issued: 11/23/1982
• Est. Priority Date: 04/10/1979
• Status: Expired

• Current Assignee: Nippon Electric Company Limited (NEC Corporation)
• Original Assignee: Nippon Electric Company Limited (NEC Corporation)
• Inventors: Ohura, Toshio
• Primary Examiner(s): TRAFTON, DAVID
• Application Number:
  US06/137,800
• Time in Patent Office: 960 Days
• Field of Search: 340/703, 340/701, 358/22
• US Class Current: 345/690
• CPC Class Codes: G09G 5/024 using colour registers, e.g. to control background, foreground, surface filling G09G5/06 takes precedence

Abstract

In a pattern display system wherein color signals are produced based on serial color data signals of red, green and blue and background colors from background color information storage means and a color pattern is displayed on predetermined picture elements in response to the color signals and an output of a voltage level signal generating circuit, there is provided color control information storage means, and amplitudes of the voltage level signal and the color signal are controlled by color control information from the storage means, so that the color pattern display can be effected with deep, pale, bright and dark properties of color controlled.

Claims

1. A pattern display system for use with color picture displays on a picture screen through random scanning comprising:

color signal generator means receiving color data and generating a color signal;

voltage levelof voltage levels for deciding a luminance of color;

amplitude control means having a plurality of information of amplitudes for deciding a saturation of color;

logical circuit means having a control signal storage circuit and a select signal generating circuit for generating a select signal which selects one of the plurality of information of voltage levels and one of the plurality of information of amplitudes based on the output of the control signal storage circuit; and

transfer means of said color signal which has already been controlled of its amplitude and voltage level.

2. A pattern display system for use with color picture displays on a picture screen through random scanning comprising:

input terminals for receiving serial color data signals of red, green and blue;

an input terminal for receiving a serial control signal which designates a priority pattern display;

background color information storage means for storing and feeding background colors;

a color difference generator circuit for generating color signals based on the serial color data signals, background color information and serial control signal;

a modulation circuit for modulating the output of the color difference generator circuit;

a circuit for generating a voltage level signal representative of brightness level;

color control information storage means; and

logical circuit means responsive to the color control information from the storage means and the serial control signal from the priority input terminal for applying to the voltage level generating circuit an output which controls the amplitude of the voltage level signal and applying to the modulation circuit an output which controls the amplitude of the color signals;

whereby, based on outputs of the modulation circuit and voltage level generating circuit, a color pattern display on predetermined picture elements can be effected with deep, pale, bright and dark properties of color controlled.

3. A pattern display system according to claim 2 wherein the output for controlling the amplitude of color signals is applied to the modulation circuit through variable impedance detecting means.

4. A pattern display system according to claim 2 wherein said color control information storage means comprises a storage for black and white display control information, a storage for information controlling the presence or absence of pattern, and a storage for information controlling brightness.

5. A pattern display system according to claim 2 wherein said color control information storage means comprises a storage for black and white display control information, a storage for information controlling the presence or absence of pattern, a storage for information controlling brightness, and a storage for information controlling intermediate color.