TH21033A - "Linear compensation circuit for wide screen televisions" - Google Patents

Abstract

A linear compensation circuit for wide screen televisions that can be compensated for. For linear images, which may be distorted due to changes in the distortion flow when the display format is changed from the 4x3 aspect ratio (AR) to AR 16x9 and vice versa. This linear compensation circuit includes a variable linear compensation coil. Which is connected to the horizontal deflection coil And controls for the change in inductance Of the linear compensation coil that changes according to the display format changes AR 4x3 and AR 16x9 in order to compensate for the linear value of the image displayed on the monitor.

Claims (4)

1. A linear-pass compensation circuit for wide screen televisions that adjusts the horizontal deflection current supplied to the horizontal deflection coil in accordance with the image display format, which is determined by the aspect ratio. (AR) This linear compensation circuit consists of a variable linear compensation coil connected to the extraction coil. Such horizontal deviation The inductance of this variable linear compensation coil is varied. A microcomputer for the provisioning of a control signal according to a predetermined visualization scheme and a control circuit for the control of changes in the inductance in the Responds to the said control signal The control circuit consists of a current detector. Horizontal deflection For detecting the level of the horizontal deflection current supplied to Such horizontal deflection coil 2. A linear compensation circuit for a wide screen TV tuner that adjusts the horizontal deflection current supplied to the deflection coil according to the picture format. Which is determined by the aspect ratio This linear compensation circuit consists of A variable linear compensation coil is connected to the Afternoon such a horizontal deflection The inductance of the changing linear compensation coil Such values will be changed. A microcomputer for providing a control signal according to a predetermined visualization scheme and a control circuit for controlling the change of inductance in the Responds to the said control signal The control circuit consists of a current detector. Horizontal deflection for detecting the level of the horizontal deflection stream supplied to the Such horizontal deflection coil Buffer for inversion of horizontal deflection currents Such that was detected by The horizontal deflection current detector and the amplification of the inverse horizontal deflection from the buffer. According to the control signal from the aforementioned microcomputer And providing an amplified current To the variable linear compensation coil thereof With a combined current Control induction 3. A linear compensation circuit for a wide screen TV tuner that adjusts the horizontal deflection current supplied to the deflection coil according to the picture format. Which is determined by the aspect ratio This linear compensation circuit consists of A variable linear compensation coil is connected to the Afternoon such a horizontal deflection The inductance of the changing linear compensation coil Such values will be changed. Where the variable linear compensation winding consists of a variable inductance transformer. Where the inductance Of its secondary winding is transformed with the said inductive control current flowing. To its primary winding A microcomputer for providing a control signal according to the image display format. Defined and Control circuit for controlling the change of inductance in the Responds to the said control signal The control circuit consists of a current detector. Horizontal deflection for detecting the level of the horizontal deflection stream supplied to the Such horizontal deflection coil Buffer for inversion of horizontal deflection currents This is detected by the said horizontal deflection current detector and the amplification for the inverse horizontal deflection current amplification from the buffer. The control signal from the said microcomputer And providing an amplified current Such to the variable linear compensation coil such as the inductive control current. 4. A linear compensation circuit for wide screen televisions that adjusts the horizontal deflection current supplied to the deflection coil according to the picture format. Which is determined by the aspect ratio This linear compensation circuit consists of A variable linear compensation coil is connected to the deflection coil. Such landscape The inductance of this variable linear compensation coil is varied. A microcomputer for providing a predefined visual wave control signal and a control circuit for controlling the change of inductance in the Responding to the said control signal The control circuit consists of a current detector. Horizontal deflection For detecting the level of the horizontal deflection current supplied to The aforementioned horizontal deflection coils and the expander where they will consist of First transistor, which is turned on / off following the logic control signal from the microcomputer. The aforementioned router And a second transmitter for amplifying the inductive control current. It is said that there is an amplification factor which will be varied depending on the output level of the said buffer and the on / off state of the first transistor. And will provide Such amplified inductance control current to the transformed linear compensation coil. Convertible In order to change the aforementioned inductance of the compensation coil Linear changeable value