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OSD circuit for displaying advertising picture data

  • US 5,325,183 A
  • Filed: 08/17/1992
  • Issued: 06/28/1994
  • Est. Priority Date: 02/29/1992
  • Status: Expired due to Fees
First Claim
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1. An OSD circuit for displaying picture data on the screen of a television receiver, comprising:

  • a signal generator for generating signals synchronized with horizontal synchronizing signals from a received video signal, and for supplying the generated signals as clock signals to a first counter;

    said first counter generating horizontal scanning addresses to memories by counting said clock signals, and being cleared upon receipt of a subsequent horizontal synchronizing signal so the horizontal scanning address returns to its initial value;

    a second counter for generating vertical scanning addresses by counting said horizontal synchronizing signals in order to supply them to said memories, and being cleared upon receipt of a vertical synchronizing signal of said received video signal so the vertical scanning address returns to its initial value;

    a third counter for generating delay signals required for displaying a data block of one picture scene for a particular period of time on the screen by counting the vertical synchronizing signals, and for supplying the delay signals to said memories thereby causing said memories to output the data block;

    said third counter being cleared upon receipt of a power-on signal to select said memories in a predetermined sequence, and thereby causing data block data to be output in a predetermined sequence;

    a flip-flop circuit for generating disabling signals to said memories in response to carry signals after receipt of the carry signals form said first counter to prevent a dual display of the picture data; and

    an automatic color adjuster for selecting picture data from said memories contrasting to the colors of the picture of the currently received video signal;

    wherein said memories store said picture data separately as main color data, first sub-color data, second sub-color data, and brightness data.

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