Color television kinescope setup apparatus

Claim 2

In a color television receiver including a color kinescope having a plurality of electron guns each of said electron guns including a beam intensity control electrode, said receiver also including a video information signal source having an output terminal direct coupled to each of said beam intensity control control electrodes, said video signal source including at least one active device and a load impedance connected in series with said active device between two terminals of a source of operating potential for energizing said active device and therefore said video information signal source and said receiver including means for deflecting electron beams produced by said respective guns in a pair of mutually perpendicular directions, control apparatus comprising in combination: a. switching means coupled in series with said active device and said load impedance and operative in a first position for disconnecting said active device from said load impedance to remove said source of operating potential from said active device to therefore disable said device, said switching means including means operative in said first position for coupling said load impedance to said source of energizing potential for applying to said beam intensity control electrodes of said kinescope a predetermined bias for each of said electron guns.

Claim 3

The control apparatus according to claim 1, wherein said means operative in said first position includes a resistor for coupling said load impedance between said source of energizing potential and said load impedance to form a voltage divider for providing said predetermined bias for each for of said electron guns.

Claim 4

The control apparatus according to claim 1 further including, second switching means associated with said beam deflection means for selectively disabling the deflection of said beam in at least one of said pair of mutually perpendicular directions.

Claim 5

In a color television receiver including a color kinescope having a plurality of electron guns each of said electron guns including a beam intensity control electrode, said receiver also including a video information signal source having an output terminal, and a source of energizing potential, and said receiver further including beam deflecting means for deflecting electron beams produced by said respective guns in a pair of mutually perpendicular directions, control apparatus comprising in combination: a. an active device having input, output and common electrodes; b. means including at least one load impedance coupling said output and common electrodes across said source of energizing potential for energizing said active device; c. a first direct current coupling path between said input electrode of said active device and said video information signal source; d. a second direct current coupling path between said output electrode of said active device and said beam intensity control electrodes of said kinescope for applying video information signals thereto; e. switching means operative in a first position for disconnecting said load impedance from said active device to disable said active device and, therefore, said video signals applied to said beam intensity control electrodes, said switching means including means for connecting said load impedance across said source of energizing potential for providing a predetermined operating bias to said electron beam intensity control electrodes, and f. second switching means associated with said beam deflection means for selectively disabling the deflection of said beams in one of said pair of mutually perpendicular directions.

Claim 6

In a color television receiver including a color kinescope having a plurality of electron guns each of said electron guns including a beam intensity control electrode, said receiver also including a video information signal source having an output terminal, and a source of energizing potential, and said receiver further including beam deflecting means for deflecting electron beams produced by said respective guns in a pair of mutually perpendicular directions, control apparatus comprising in combination: a. an active device having input, output and common electrodes; b. means including at least one load impedance coupling said output and common electrodes across said source of energizing potential for energizing said active device; c. a first direct current coupling path between said input electrode of said active device and said video information signal source; d. a second direct current coupling path between said output electrode of said active device and said beam intensity control electrodes of said kinescope for applying video information signals thereto; e. switching means operative in a first position for disconnecting said load impedance from said active device to disable said active device and, therefore, said video signals applied to said beam intensity control electrodes, said switching means including means for connecting said load impedance across said source of energizing potential for providing a predetermined operating bias to said electron beam intensity control electrodes, and f. second switching means associated with said beam deflection means for selectively disabling the deflection of said beams in one of said pair of mutually perpendicular directions.

Claim 7

The control apparatus according to claim 4 wherein said active device is a vacuum tube having a plate output, a common cathode electrode and a grid input electrode.

Claim 8

The control apparatus according to claim 5 wherein said load impedance includes a resistor coupled between said cathode electrode and the point of reference potential of said energizing supply.

Claim 9

Setup control apparatus for use in a color television receiver having a color kinescope included therein, said kinescope having a plurality of electron guns each one having a beam intensity control electrode, said receiver also including a video information signal source having an output terminal, said receiver further including a source of operating potential, and said receiver including means for deflecting electron beams produced by said respective guns in a pair of mutually perpendicular directions, comprising in combination: a. an active device having input, output and common electrodes, a first direct coupling path between said output electrode and said beam intensity control electrodes of said kinescope, and a second direct coupling path between said input electrode and said output terminal of said video signal source, b. switching means including a resistor coupling said output electrode and said common electrode of said active device across said source of operating potential for energizing said device in a first selectable position of said switching means and for disconnecting said active device from said source of operating potential in a second selectable position of said switching means, which second selectable position includes means for connecting said resistor across said source of operating potential for providing a predetermined bias to said beam intensity control electrodes of said kinescope of a magnitude useful for kinescope setup.

Claim 10

Setup control apparatus for use in a color television receiver having a color kinescope included therein, said kinescope having a plurality of electron guns each one having a beam intensity control electrode, said receiver also including a video information signal source having an output terminal, said receiver further including a source of operating potential, and said receiver including means for deflecting electron beams produced by said respective guns in a pair of mutually perpendicular directions, comprising in combination: a. an active device having input, output and common electrodes, a first direct coupling path between said output electrode and said beam intensity control electrodes of said kinescope, and a second direct coupling path between said input electrode and said output terminal of said video signal source, b. switching means including a resistor coupling said output electrode and said common electrode of said active device across said source of operating potential for energizing said device in a first selectable position of said switching means and for disconnecting said active device from said source of operating potential in a second selectable position of said switching means, which second selectable position includes means for connecting said resistor across said source of operating potential for providing a predetermined bias to said beam intensity control electrodes of said kinescope of a magnitude useful for kinescope setup.

Claim 11

The apparatus according to claim 7 further including: a. second switching means associated with said beam deflection means for selectively disabling the deflection of said beam in one of said pair of mutually perpendicular directions for said second selectable position of said switching means.

Claim 12

Setup control apparatus for use in a color television receiver having a color kinescope included therein, said kinescope having a plurality of electron guns each one having a beam intensity control electrode, said receiver also including a video information signal source having an output terminal, said receiver further including a source of operating potential, and said receiver including means for deflecting electron beams produced by said respective guns in a pair of mutually perpendicular directions, comprising in combination: a. an active device having input, output and common electrodes, a first direct coupling path between said output electrode and said beam intensity control electrodes of said kinescope, and a second direct coupling path between said input electrode and said output terminal of said video signal source, b. means coupled to said output electrode of said active device adapted to apply thereto said operating potential, c. a first resistor having first and second terminals, said second terminal connected to a point of reference potential, d. switching means having first and second selectable positions, said first position coupling said first terminal of said resistor to said common terminal of said active device to thereby comPlete a DC path for said active device, said second position serving to disconnect said resistor from said common terminal, e. a second resistor having a first terminal coupled to said first direct coupling path and a second terminal coupled to said switching means in said second position, to form a voltage divider with said first resistor for biasing said beam intensity control electrodes of said kinescope at a predetermined bias in said second position.

Claim 13

Setup control apparatus for use in a color television receiver having a color kinescope included therein, said kinescope having a plurality of electron guns each one having a beam intensity control electrode, said receiver also including a video information signal source having an output terminal, said receiver further including a source of operating potential, and said receiver including means for deflecting electron beams produced by said respective guns in a pair of mutually perpendicular directions, comprising in combination: a. an active device having input, output and common electrodes, a first direct coupling path between said output electrode and said beam intensity control electrodes of said kinescope, and a second direct coupling path between said input electrode and said output terminal of said video signal source, b. means coupled to said output electrode of said active device adapted to apply thereto said operating potential, c. a first resistor having first and second terminals, said second terminal connected to a point of reference potential, d. switching means having first and second selectable positions, said first position coupling said first terminal of said resistor to said common terminal of said active device to thereby comPlete a DC path for said active device, said second position serving to disconnect said resistor from said common terminal, e. a second resistor having a first terminal coupled to said first direct coupling path and a second terminal coupled to said switching means in said second position, to form a voltage divider with said first resistor for biasing said beam intensity control electrodes of said kinescope at a predetermined bias in said second position.