KR100447601B1 - Correction circuit for miss-Convergence correction device of deflection yoke - Google Patents

Abstract

The present invention relates to a device for correcting miss convergence of deflection yoke, and more particularly, to improve a method of improving the conventional coil by adjusting the distribution of the coil and changing an additive to suppress the BING phenomenon during the miss convergence. However, the present invention relates to an improvement circuit of a misconvergence correction device of a deflection yoke for calcination by adjusting the amount of current flowing through a coma-free coil by varying a long period of improvement and insufficient improvement.

Description

Correction circuit for miss-convergence correction device of deflection yoke

The present invention relates to a device for correcting miss convergence of deflection yoke, and more particularly, to improve a method of improving the conventional coil by adjusting the distribution of the coil and changing an additive to suppress the BING phenomenon during the miss convergence. However, the present invention relates to an improvement circuit of a misconvergence correction device of a deflection yoke for calcination by adjusting the amount of current flowing through a coma-free coil by varying a long period of improvement and insufficient improvement.

Generally, deflection yoke is a device for deflecting an electron beam emitted from an electron gun of a cathode ray tube. Coma Free is the VCR (Ver.Center Raster) characteristic of deflection yoke, ie the center of red (R) / blue (B) and green (G) vertical misalignments at the measuring point on the vertical axis of the cathode ray tube. It makes the convergence sensitivity good.

In addition, misconvergence in the deflection yoke is displayed on the screen due to landing error, distortion error, and VCR distortion. This landing error refers to a misconvergence in which the electron beams R, G, and B scanned from the electron gun are not accurately scanned at each pixel on the screen, and are scanned from each pixel to the center of the screen or to the edge of the screen. (narrow) means misconvergence in a widened state.

In addition, the distortion error is a misconvergence in which the electron beams B, G, and R are scanned on the screen out of the upper and lower sides of the screen, or are driven to the center of the screen to prevent the beam from being scanned at the edges. It means the misconvergence of the barrelized or pinned state.

In addition, the VCR distortion is a misconvergence in which the red beam R and the blue beam B are accurately scanned on the screen, whereas the green beam G is not accurately scanned on each pixel of the screen, and an error occurs in the vertical direction.

1 is a circuit diagram of an apparatus for correcting misconvergence in such a conventional deflection yoke.

As shown therein, the vertical coil unit from the node A14 to the node A13 is provided, and the first and second resistors R1 and R2 connected in parallel to the output terminal (node A13) of the vertical coil unit, and the vertical coil unit An anode terminal is connected to an output terminal (node A13), and a cathode terminal includes a first diode D1 connected to the other end of the first resistor R1, and a cathode terminal is connected to an anode terminal of the first diode D1. The anode terminal is connected in parallel with a second diode D2 connected to the other end of the second resistor R2, an anode terminal of the second diode D2, and a cathode terminal of the first diode D1. And a series of YHA variable resistors YHA and YHA variable resistors YHA, each of which has a variable resistance according to a voltage applied to an anode terminal of the first diode D1, in series. The conduction current is changed by the resistance First and is added YHA correction consisting of two coma-free coil (given reference numeral mi).

The portion from node A5 to node A3 is commonly referred to as a YHC misconvergence adjustment section, in which a third and fourth commafree coils (not given reference numerals) are connected in series with the YHA correction portion. A YHC variable resistor (YHC VR) is connected in parallel to the third and fourth comaprider coils. The YHC variable resistor (YHC VR) controls the relative amount of current flowing through the third and fourth comaprider coils. To adjust the on-screen misconvergence.

The following description of the circuit will be omitted.

In this case, when a normal screen without miss convergence is provided through the above-described circuit, the normal screen pattern is illustrated as shown in FIG. 2. However, FIGS. 3 and 4 attached to FIG. BING) is an exemplary view for explaining the phenomenon, Figure 3 shows the ice phenomenon and Figure 4 shows the reverse ice phenomenon.

The conventional method for suppressing such ice phenomenon is to take a method of improving the distribution of the coil, change of the additives, etc., but the problem of long improvement period and insufficient improvement has occurred.

An object of the present invention for solving the conventional problems as described above relates to a miss convergence correction device of the deflection yoke, in particular, to suppress the BING phenomenon during the miss convergence (conventional coil) Improvement circuit of deflection yoke's misconvergence correction device for calcination by adjusting the amount of current flowing through the comafree coil by adjusting the current distribution through the distribution distribution and the change of the additives. To provide.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram of a misconvergence correction apparatus for a general deflection yoke.

2 is an exemplary view of a normal screen.

3 and 4 are diagrams illustrating the state of the screen according to the occurrence of BING phenomenon during miss convergence.

5 is a circuit diagram illustrating a misconvergence correction apparatus for a deflection yoke according to the present invention.

Features of the circuit according to the present invention to achieve the above object, the first to second upper, lower coma precoil electrically connected in series with the vertical coil main portion; A YHC misconvergence adjustment unit connected in parallel to the first upper and lower comaprider coils to adjust a relative amount of current flowing through the first upper and lower comaprire coils to adjust misconvergence on the screen; A YV misconvergence adjustment unit connected in parallel to the second upper and lower comaprider coils and controlling a relative amount of current flowing through the second upper and lower comaprire coils to adjust vertical misconvergence of the screen; An upper YH variable resistor connected in series between a connection point of the YHC misconvergence adjusting unit and a first upper coma pre coil and a second upper coma pre coil to adjust an amount of current flowing through the upper coma precoil; And a lower YH variable resistor connected in series between the connection point of the YHC misconvergence adjusting unit and the first lower coma preil coil and the second lower coma pre coil to adjust an amount of current flowing in the lower coma precoil. .

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

First, the configuration and operation of a noise improvement circuit according to the present invention will be described with reference to FIG. 5.

FIG. 5 is a circuit improved from the node A13 to the node A5 in the configuration according to the prior art of FIG. 1, wherein the YHC misconvergence adjusting unit is connected to the lower comapri coil using a variable resistor called YHA. This is to adjust the misconvergence on the screen by controlling the relative amount of current flowing through the upper comapri coil.

Looking at the configuration briefly, the vertical coil portion from node A14 to node A13 is provided, and the first and second variable resistors VR1 and VR2 connected in parallel to the output terminal (node A13) of the vertical coil portion, and the vertical nose An anode terminal is connected to a part of an output terminal (node A13), and a cathode terminal is connected to a first diode D1 connected to the other end of the first variable resistor VR1 and a cathode is connected to an anode terminal of the first diode D1. A terminal is connected and the anode terminal is connected to the other end of the second variable resistor VR2, the anode terminal of the second diode D2, and the cathode terminal of the first diode D1. Are connected in series and connected in series to one end of the YHA variable resistor (YHA) and the YHA variable resistor (YHA), the resistance of which is varied according to the voltage across the anode terminal of the first diode (D1), and the YHA variable resistor (YHA). Conduction by variable resistance value of There is a YHA correction section composed of first and second comapricoils (reference numbers not given) whose currents vary.

The portion from node A5 to node A3 is commonly referred to as a YHC misconvergence adjustment section, in which a third and fourth commafree coils (not given reference numerals) are connected in series with the YHA correction portion. A YHC variable resistor (YHC VR) is connected in parallel to the third and fourth comaprider coils. The YHC variable resistor (YHC VR) controls the relative amount of current flowing through the third and fourth comaprider coils. To adjust the on-screen misconvergence.

The description of the subsequent circuits is omitted.

Therefore, after adjusting the YH volume (YHA) during the operation test, the operator visually adjusts the characteristics of the current flowing in the upper and lower copa precoils.

At this time, if a problem occurs in the upper side or the lower side due to the characteristics of the current to be adjusted, the variable resistors VR1 and VR2 corresponding to the upper side or the lower side in which the problem occurs among the variable resistors referred to as reference numerals VR1 and VR2 which are further configured. By adjusting only the defect of the screen characteristic that causes a problem is minimized.

Although preferred embodiments of the present invention have been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, when the improvement circuit according to the present invention is provided, the conventional circuit is distributed by adjusting the distribution of the coil and changing the additives in order to suppress the BING phenomenon during the miss convergence. Inadequate problems can be solved.

Claims (1)

First to second upper and lower comapricoils electrically connected in series with the vertical coil main part; A YHC misconvergence adjustment unit connected in parallel to the first upper and lower comaprider coils to adjust a relative amount of current flowing through the first upper and lower comaprire coils to adjust misconvergence on the screen; A YV misconvergence adjustment unit connected in parallel to the second upper and lower comaprider coils and controlling a relative amount of current flowing through the second upper and lower comaprire coils to adjust vertical misconvergence of the screen; An upper YH variable resistor connected in series between a connection point of the YHC misconvergence adjusting unit and a first upper coma pre coil and a second upper coma pre coil to adjust an amount of current flowing through the upper coma precoil; And And a lower YH variable resistor connected in series between the connection point of the YHC misconvergence adjusting unit and the first lower coma precoil and the second lower coma pre coil to adjust an amount of current flowing in the lower coma precoil. Improved circuit for misconvergence correction device of deflection yoke.