Automatic level adjusting system for a television receiver

Claim 2

An improved television receiver of the type which includes a video signal source for supplying a video signal, picture reproducing means, an automatic level control circuit connected between said video signal source and said picture reproducing means, said automatic level control circuit including reference pulse insertion means for inserting a reference pulse signal into said video signal at a predetermined position, level detecting means connected between said reference pulse insertion means and said picture reproducing means for detecting a signal level at said predetermined position, level correction means connected between said video signal source and said picture reproducing means, and control means connected to said level detecting means for controlling said level correction means such that the level of the video signal is corrected in response to said detected level, wherein the improvement comprises: a non-volatile memory for storing a positional datum corresponding to said predetermined position, and activating means connected between said non-volatile memory and said reference pulse insertion means for activating the latter to generate said reference pulse signal at said predetermined position in response to said positional datum stored in said non-volatile memory.

Claim 3

A television receiver according to claim 1, further including means for setting said positional datum in said non-volatile memory.

Claim 4

A television receiver accordng to claim 2, wherein said setting means sets includes a bus-line connected between said non-volatile memory and said reference pulse insertion means and an outside computer for storing said positional datum into said non-volatile memory via said bus-line.

Claim 5

A television receiver according to claim 3, wherein said outside computer is a television production line computer.

Claim 6

A television receiver according to claim 1, wherein said activating means including a bus-line connected between said non-volatile memory and said reference pulse insertion means.

Claim 7

A television receiver according to claim 1, wherein said reference pulse is either a black or white reference pulse.

Claim 8

A television receiver according to claim 1, wherein said non-volatile memory also stores a cutoff datum of said picture reproducing means.

Claim 9

A television receiver according to claim 1, wherein said reference pulse insertion means includes a reference pulse generator for generating a reference pulse signal, and an adding circuit connected between said video signal source and said reference pulse generator for inserting said reference pulse signal into said video signal.

Claim 10

A television receiver comprising: a video signal source for supplying a plurality of primary color signals; color picture reproducing means; a corresponding plurality of automatic level control circuits connected between said video signal source and said color picture reproducing means for receiving said plurality of primary color signals and for separately supplying level controlled primary color signals to said color picture reproducing means; each of said automatic level control circuits including: reference pulse insertion means for inserting a reference pulse into the corresponding primary color signal at a predetermined position; level detecting means connected between said reference pulse insertion means and said color picture reproducing means for detecting the level of the primary color signal at said predetermined position; level correction means connected between said video signal source and said picture reproducing means; and control means connected to said level detecting means for controlling said level correction means such that the level of the primary color signal is corrected in response to said detected level, said control means including: a non-volatile memory for storing positional data corresponding to said predetermined positions for said plurality of primary color signals, and activating means connected between said non-volatile memory and said reference pulse insertion means for activating the latter to generate said reference pulse signals at said predetermined positions in response to said positional data of said non-volatile memory.

Claim 11

A television receiver comprising: a video signal source for supplying a plurality of primary color signals; color picture reproducing means; a corresponding plurality of automatic level control circuits connected between said video signal source and said color picture reproducing means for receiving said plurality of primary color signals and for separately supplying level controlled primary color signals to said color picture reproducing means; each of said automatic level control circuits including: reference pulse insertion means for inserting a reference pulse into the corresponding primary color signal at a predetermined position; level detecting means connected between said reference pulse insertion means and said color picture reproducing means for detecting the level of the primary color signal at said predetermined position; level correction means connected between said video signal source and said picture reproducing means; and control means connected to said level detecting means for controlling said level correction means such that the level of the primary color signal is corrected in response to said detected level, said control means including: a non-volatile memory for storing positional data corresponding to said predetermined positions for said plurality of primary color signals, and activating means connected between said non-volatile memory and said reference pulse insertion means for activating the latter to generate said reference pulse signals at said predetermined positions in response to said positional data of said non-volatile memory.

Claim 12

A television receiver according to claim 9, wherein said activating means includes a bus-line connected between said non-volatile memory and said reference pulse insertion means.

Claim 13

A television receiver according to claim 10, wherein said positional data are stored into said non-volatile memory via said bus-line from an outside computer.

Claim 16

A method of adjusting the white balance of a television receiver as recited in claim 12, wherein the step of storing the positional datum in the non-volatile memory occurs during manufacturing of the television receiver.

Claim 17

A method of adjusting the white balance of a television receiver as recited in claim 12, wherein the step of generating the reference pulse comprises generating a black reference pulse.

Claim 18

A method of adjusting the white balance of a television receiver as recited in claim 12, wherein the step of generating the reference pulse comprises generating a white reference pulse.

Claim 19

A method of adjusting the white balance of a television receiver as recited in claim 12, further comprising the step of storing picture reproducing cutoff datum for the television receiver.