Automatic adjustment apparatus for independently adjusting different regions of a picture raster

• US 5,087,976 A
• Filed: 10/31/1990
• Issued: 02/11/1992
• Est. Priority Date: 11/10/1989
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Amano, Toshio, Oda, Osamu
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): HSIA, SHERRIE Y
• Application Number:
  US07/607,284
• Time in Patent Office: 468 Days
• Field of Search: 358/188, 358/191.1, 358/193.1, 358/194.1, 358/168, 358/169, 358/166, 358/169, 358/166, 358/174, 358/164, 358/27, 358/22 PIP, 358/183
• US Class Current: 348/25
• CPC Class Codes: H04N 21/43072 of multiple content streams on the same device
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 5/44504 Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
• CPC Class Codes: H04N 5/45 Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 5/57 Control of contrast or brightness

Abstract

An automatic picture adjustment apparatus in which input video signals are subjected to level conversion for picture quality adjustment within a time period which is shorter than one vertical synchronization period so that the picture quality adjustment of predetermined different portions of the raster may be independently corrected.

Claims

1. An automatic picture adjustment apparatus comprising, a level converter for performing level conversion on input video signals for adjusting the picture quality of a displayed image;

a level detector receiving and detecting the level of said input video signals, a controller which controls said level converter and receiving the output signal of said level detector, wherein said controller controls said level detector within a predetermined time period shorter than one vertical synchronization period, further comprising a sampling signal generator which generates sampling signals for determining individual sampled video signals which respectively correspond to different regions of a picture raster, and an A/D converter controlled by said sampling signal generator and converting the input video signals into corresponding digital signals, wherein said controller is formed of a micro-computer circuit, wherein said micro-computer circuit establishes individual parameters for each of said different regions of said picture raster, and wherein said level converter is controlled such that said different regions of a picture raster are individually adjusted.

2. A television receiver having an automatic picture adjustment function, said television receiver comprising, an automatic picture adjustment apparatus, a tuner which receives RF signals and converts them into intermediate frequency signals, an intermediate frequency circuit receiving and processing said intermediate frequency signals and supplying them to said automatic picture adjustment apparatus, and a display device for displaying an image receiving the output of said automatic picture adjustment apparatus, and wherein said automatic picture adjustment apparatus independently controls each different regions of said picture raster.

3. A television receiver comprising, a tuner which receives incoming signals and passes a selected signal, a level converter which receives the output of said tuner, a video presentation means with a picture area which receives and displays the output of said level converter, an automatic picture quality adjustment circuit receiving an output of said tuner and supplying an output to control said level converter to modify its output to said presentation means so that signals displayed on different regions of said picture area are differently amplified so that each region can be independently corrected and the complete picture area is made up of said different regions, wherein said automatic picture quality adjustment circuit comprises a micro-computer which includes a sampling signal generator, a level detector and a control circuit, and including an analog to digital converter connected between said tuner and said microcomputer circuit.