KR20010075982A - Convergence adjustment apparatus and method - Google Patents

Abstract

PURPOSE: A device for regulating convergence and a method of the same are provided to improve a phenomenon which a color spreads or a color focus is distorted partially on a screen by getting a user to shift partial convergence regulating reference data of the screen directly. CONSTITUTION: A memory(301) records initial convergence regulating reference data. A regulation pattern generation unit(302) generates a convergence regulation pattern corresponding to a regulation pattern control signal. An input unit(308) selects a convergence regulating command and regulating position, and inputs convergence regulating data to shift by using the convergence regulation pattern. A system control unit(303) generates the regulation pattern control signal for selecting the convergence regulation pattern corresponding to the convergence regulating command and regulating position, and shifts the initial convergence regulating reference data into the convergence regulating data to shift. A convergence control unit(304) applies the convergence regulation data to shift and operates the convergence regulating data by an appointed convergence operation formula to generate a convergence yoke voltage.

Description

Convergence adjustment apparatus and method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for adjusting the convergence of a television, and in particular, a user effectively responds to the convergence distortion caused by the influence of the geomagnetic field in the region where the television is installed after the convergence adjustment is completed in the production line. A convergence adjustment device and method for performing partial convergence adjustment.

Projection televisions have respective Cathode Ray Tubes (CRTs) that display images of red, green, and blue colors and project them on a screen screen. However, as shown in FIG. 1, since distances and angles between the R, G, and B CRTs and the screen are different, a convergence adjustment for exactly matching the R, G, and B color signals in one place is necessary.

Accordingly, convergence adjustment is performed using a separate adjustment jig and a pattern generator in the adjustment process of the projection television production line. For example, in the real-time digital convergence correction system, the convergence adjustment data of horizontal and vertical lines are variably adjusted by interpolation, and 5 × 5 seed data stored in a memory is applied to a known fourth-order Lagrange polynomial. Calculate. The reason for using the quadratic function is that the CRT sphere of the projection TV is made aspherical to increase luminous efficiency. To obtain the most natural curve connecting the aspherical CRT surface, 5 points with the highest degree of curved surface are selected. Seed points were selected and calibration of convergence was performed using the Lagrange fourth interpolation polynomial.

In this way, the product is shipped after fine adjustment of the convergence of each part of the screen in the adjustment process of the production line of the projection TV. Therefore, the convergence adjustment is exactly correct in the production line in which the product is shipped, but sometimes the convergence adjustment is distorted depending on the influence of the geomagnetic field of the region where the projection TV is installed after the product is shipped.

In order to improve the phenomenon that the convergence adjustment is distorted by the user environment as described above, the user can adjust the convergence by the conventional technology as follows.

That is, as shown in FIG. 1, the conventional convergence adjusting device includes a memory 201, a system control unit 202, a convergence control unit 203, a DC level adjusting unit 204, an amplifier 205, and a convergence coil. 206 and input means 207.

The memory 201 stores convergence adjustment data that has been adjusted in the adjustment process of the production line. At this time, the convergence adjustment data of all the vertical and horizontal lines may be stored in the memory 201, but typically only the convergence adjustment reference data is stored as the seed data.

The system control unit 202 inputs the vertical / horizontal synchronization signal, reads the corresponding seed data of the memory 201 and applies it to the convergence control unit 203, and the convergence control unit 203 prescribes the seed data. A convergence correction signal is generated by calculating convergence adjustment data at all points using a convergence equation (eg, a known fourth-order Lagrange polynomial).

At this time, the DC level adjusting unit 204 changes the DC level of the convergence correction signal to a value corresponding to the convergence adjustment value applied directly by the user through the input means 207 through the convergence correction signal applied from the system control unit 202. .

Then, it is applied to the R, G, B convergence coil 206 via the amplifier 205 so that the user can adjust the convergence of the entire screen.

That is, the variation of the overall DC level of the convergence correction signal causes the entire screen to be shifted for the R, G, and B color signals.

Therefore, according to the related art, when the convergence adjustment is changed after the TV is shipped, the convergence can be adjusted by moving the entire screen with a simple DC voltage variable, but when the partial convergence of the screen is changed, the user There was a problem that could not be partially adjusted convergence.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a convergence adjusting device and a method for directly adjusting convergence of a screen partly by a user, in which a convergence is changed due to a local magnetic field after installation of a television, in order to solve the above problems. have.

1 shows the structure of a cathode ray tube and a screen of a typical projection television.

2 is a configuration diagram of a convergence adjustment device according to the prior art.

3 is a configuration diagram of a convergence adjustment device according to the present invention.

4 is a flowchart of a convergence adjustment method according to the present invention.

5 shows a screen for determining an adjustment position in the convergence adjustment method according to the present invention.

In order to achieve the above technical problem, the convergence adjustment device according to the present invention is a convergence adjustment device of a television, comprising: a memory for storing initial convergence adjustment reference data and an adjustment pattern for generating a convergence adjustment pattern corresponding to an adjustment pattern control signal; A generation unit, input means for selecting a convergence adjustment command and an adjustment position according to a user's selection, and inputting convergence adjustment data to be changed using the convergence adjustment pattern, the convergence adjustment command input from the input means, and Generating the adjustment pattern control signal for selecting a corresponding convergence adjustment pattern corresponding to the adjustment position, and for changing the initial convergence adjustment reference data stored in the memory with the convergence adjustment data to be changed; Applying the control system and convergence adjustment data to be the change and will be characterized in that it comprises the convergence control unit for operation by the convergence adjustment data to generate a convergence yoke voltage by a predetermined convergence equation.

In accordance with one aspect of the present invention, there is provided a method for adjusting convergence of a television, the method comprising: (a) determining whether a convergence adjustment command is input, (b) determining the result of step (a) When the convergence adjustment command is input, a step for the user to select a convergence adjustment position, (c) displaying an adjustment pattern corresponding to the convergence adjustment position selected in step (b), and (d) the adjustment Changing the convergence adjustment reference data initially set to the change convergence adjustment reference data corresponding to the value adjusted using the pattern; and (e) convergence adjustment by a predetermined convergence equation using the change adjustment convergence adjustment reference data. And generating the data.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the apparatus for adjusting convergence according to the present invention includes a memory 301, an adjustment pattern generator 302, a system controller 303, a convergence controller 304, a cathode ray tube block 305, and a signal processor. 306, deflection control unit 307, and input means 308 are provided.

The cathode ray tube block 305 includes R, G, B, cathode ray tubes 305A, 305B, and 305C, deflection yokes of each cathode ray tube (305D, 305E, 305F), and convergence yokes of each cathode ray tube (305G, 305H, 305I). It consists of.

The memory 301 stores convergence adjustment data that has been adjusted in the adjustment process of the production line. At this time, the convergence adjustment values of all vertical horizontal lines may be stored in the memory 301. However, it is effective to store only the convergence adjustment reference data as 5x5 seed data as an example. In an embodiment of the present invention, only convergence adjustment reference data is stored.

The adjustment pattern generator 302 generates a convergence adjustment pattern in response to the adjustment pattern control signal of the system controller 303.

The system control unit 303 executes system-wide control. In particular, the system control unit 303 analyzes key commands input through the input unit 308 and executes the corresponding control.

The convergence control unit 304 applies the convergence adjustment reference data read from the memory 302 to the convergence equation and calculates and applies the convergence adjustment data of the entire horizontal / vertical line to the convergence yoke.

The signal processor 306 separates and demodulates a video signal from a broadcast signal received by an antenna (not shown), converts it into R, G, and B signals, and adjusts the convergence output from the adjustment pattern generator 302. Signal processing is performed to output the pattern to the R, G, B cathode ray tubes 305A, 305B, and 305C.

The deflection control unit 307 deflects the electrons generated by the electron gun (not shown) inside the cathode ray tube in the vertical / horizontal direction by the force of the electromagnetic field caused by the deflection control voltage.

Next, the operation of the configuration of FIG. 3 will be described in detail with reference to the flowchart of FIG. 4.

In step 401, it is determined whether a convergence adjustment command has been input to the system control unit 303. That is, it is determined whether the user inputs the key command of the convergence adjustment command by using the key button of the input means 308.

In step 402, if the convergence adjustment command is input as a result of the determination in step 401, the user selects the convergence adjustment position using the key button of the input means 308. For example, when a convergence adjustment command is input, a screen for selecting a convergence adjustment position as shown in FIG. 5 may be output, and the user may determine the position of the screen on which the convergence adjustment is to be performed using a key button of the corresponding number. . In addition, the program can be designed to adjust the convergence by moving the entire screen by the user's selection (for example, a "0" key button). That is, according to the user's intention, the convergence adjustment of the full screen or the convergence adjustment of the partial screen can be freely selected.

In step 403, the convergence adjustment pattern for executing the convergence adjustment at the position of the screen portion selected in step 402 is generated in the adjustment pattern generator 302 in accordance with the adjustment pattern control signal of the system control unit 303. That is, when the user selects the convergence adjustment position as the upper right ④, the cross pattern (+) of R, G, and B colors is generated only on the upper right of the screen and displayed on the screen.

In step 404, a cross pattern of the remaining R and B colors is matched with a G pattern as an example of the horizontal or vertical direction in the displayed cross pattern.

For example, in the method of moving the cross pattern, the horizontal direction uses a channel up / down key button installed in the input means 308, and the vertical direction uses a volume +/− key button to adjust the convergence. ) Can be designed. The color selection for adjusting the convergence may design a program of the system controller 303 to be selected using a red / blue selection key button installed in the input means 308.

In step 405, the system control unit 303 changes the convergence adjustment reference data initially stored in the memory 301 with the convergence adjustment reference data which is changed by the user in the adjustment in step 404.

In step 406, the convergence control unit 304 generates the convergence adjustment data by the convergence equation using the change adjustment convergence adjustment reference data. That is, the change adjustment convergence adjustment reference data is applied to the convergence calculation equation to calculate all convergence adjustment data between the convergence adjustment reference data. Then, the convergence is corrected by applying a voltage corresponding to the calculated convergence adjustment data to the convergence yokes 305G, 305H, and 305I of the R, G, and B cathode ray tubes.

After the product is shipped in this way, color blurring or partial color shift caused by the effects of the earth's magnetic field, etc., can be partially corrected by the user's choice. It became.

As described above, according to the present invention, the user directly changes the partial convergence adjustment reference data of the screen to the partial color bleeding or the phenomenon that the focus is shifted due to the influence of the geomagnetic field after shipment of the product. It is effective to improve color blurring or partial color shift of the screen.

Claims (4)

In the convergence adjustment device of the television, A memory for storing initial convergence adjustment reference data; An adjustment pattern generator for generating a convergence adjustment pattern corresponding to the adjustment pattern control signal; Input means for selecting a convergence adjustment command and an adjustment position according to a user's selection, and inputting convergence adjustment data to be changed using the convergence adjustment pattern; Generating the adjustment pattern control signal for selecting the convergence adjustment pattern corresponding to the convergence adjustment command and adjustment position inputted from the input means, and the initial convergence adjustment stored in the memory with the convergence adjustment data to be changed; A system controller for changing the reference data; And And a convergence controller configured to apply the convergence adjustment data to be changed to calculate the convergence yoke voltage by calculating the convergence adjustment data according to a predetermined convergence equation. The apparatus of claim 1, wherein the memory stores only N × M seed data as a reference for the convergence calculation by the adjustment process during production. The apparatus of claim 1, wherein the adjustment position controls a full screen convergence adjustment or a partial screen convergence adjustment that moves the entire screen to be determined by a user's selection. In the convergence adjustment method of the television, (a) determining whether a convergence adjustment command is input; (b) a step for the user selecting a convergence adjustment position when the convergence adjustment command is input as a result of the determination of step (a); (c) displaying an adjustment pattern corresponding to the convergence adjustment position selected in step (b); (d) changing the convergence adjustment reference data initially set to the change convergence adjustment reference data corresponding to the adjusted value using the adjustment pattern; And and (e) generating convergence adjustment data by using a predetermined convergence equation by using the change adjustment convergence adjustment reference data.