KR20020009825A - Apparatus for correcting the convergence corresponding to size of display means in TV - Google Patents

Abstract

PURPOSE: An apparatus for correcting convergence based on the sizes of television display devices, which stores convergence basic data items different for the sizes of televisions to be produced in one memory and reads convergence basic data corresponding to the size of a television model using a convergence control IC, is provided to utilize the data for correcting convergence. CONSTITUTION: An apparatus for correcting convergence of television includes a memory(302) for storing convergence basic data items different for the sizes of television display devices, and a system controller(301) for generating convergence control commands corresponding to information about the sizes of the display devices and convergence control key data. The apparatus further has a convergence controller(303) for reading convergence basic data corresponding to the information about the sizes of the display devices transmitted from the system controller and calculating convergence correction data according to a predetermined convergence calculating expression to generate a convergence yoke voltage.

Description

Apparatus for correcting the convergence corresponding to size of display means in TV}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for compensating convergence of televisions, and more particularly, to store convergence adjustment basic data different for each size of television display means in a single memory, and to store several models of different sizes of television display means in a single convergence control IC. A convergence correction device for each size of a television display means for executing convergence correction using an integrated circuit.

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 is required to exactly match the beams of the R, G, and B color signals in one place.

Convergence adjustment is typically performed by matching the red and blue color images around the green color image. Specifically, a cross hatch pattern generated by the pattern generator is applied to the R / G / B CRT to obtain an image projected on the screen, and miss convergence of the R / G / B image projected on the screen. The degree of convergence is detected through a charge coupled device (CCD), and a convergence adjustment value for correcting a driving voltage applied to the convergence coil of the R / G / B CRT is calculated according to the detected miss convergence degree. The calculated convergence adjustment value is stored in the memory, and the convergence correction value is corrected by the stored convergence adjustment value.

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, by adjusting the convergence adjustment data of the horizontal line and the vertical line by interpolation, 5 × 5 seed data stored in the 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 television is made aspherical to increase luminous efficiency. To obtain the most natural curve connecting the curved surface of the aspherical CRT, 5 points with the highest degree of curved surface are selected. Convergence correction was performed by selecting the seed point and calculating convergence data of the point using Lagrangian fourth-order interpolation polynomial.

As shown in FIG. 2, the conventional apparatus for correcting convergence includes a system controller 201, a memory 202, a convergence controller 203, an amplifier AMP, a convergence coil 205, and a signal processor. 206 and a cathode ray tube (CRT: 207).

When the convergence adjustment mode is selected from the key input means (not shown in the drawing), the system controller 201 outputs control data for convergence adjustment to the convergence control unit 203, and the convergence adjustment input from the outside to the signal processing unit 206. Send a command to process the pattern signal.

Then, the convergence control unit 203 reads the convergence basic data stored in the memory 202 in time with the timing of the input vertical sync signal Vsync and the horizontal sync signal Hsync. Convergence adjustment data at all points is calculated by using the fourth-order Lagrangian polynomial).

The convergence correction signal is then amplified by the amplifier 204 and then applied to the convergence coils 205 of R, G, and B, respectively. The R, G, and B signals of the convergence adjustment pattern signal signal-processed by the signal processor 206 are output to the CRT 207. The CRT 207 is amplified by the amplified convergence correction signal applied to the convergence coil 205. The deflection amount of the beams of the R, G, and B signals outputted at the N-th output signal is determined. In the convergence adjustment mode, the convergence adjustment is performed so that the beams of the R, G, and B signals are matched in one place using the convergence adjustment pattern.When the convergence adjustment is performed, the convergence basic data is changed, and after the convergence adjustment is completed, the memory (202) Updates the convergence basic data stored at) to the changed convergence basic data after the convergence adjustment.

However, the convergence basic data stored in the memory 202 for this convergence correction is different for each size of the television display means (CRT or screen). Accordingly, the convergence correction apparatus according to the related art uses a convergence control IC including a memory storing only convergence basic data corresponding to a single size of the television display means, so that each time a different model is produced for each inch of the television display means, There was a problem in designing and controlling the convergence control IC.

The technical problem to be solved by the present invention is to solve the above problems, after storing the different convergence basic data for each size of the television to be produced in one memory for each TV size, the size of the television using a single convergence control IC The present invention provides a convergence correction device for each size of a television display means for reading out convergence basic data corresponding to the size of a corresponding model and using the same for convergence correction.

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

2 is a configuration diagram of a convergence correction device for a television according to the prior art.

3 is a block diagram of a size-specific convergence correction device of the television display means according to the present invention.

In order to achieve the above technical problem, the apparatus for correcting convergence for each size of the television display means according to the present invention includes a memory for storing convergence basic data for each display means size of the television, and the display of the television. A system controller for generating a convergence adjustment command corresponding to the information on the means size and the convergence adjustment key data inputted, and the convergence basic data corresponding to the information on the display means size of the television transmitted from the system controller from the memory; And a convergence control unit for generating the converged yoke voltage by reading the convergence correction data by a predetermined convergence equation.

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 correcting size-specific convergence of the television display means according to the present invention includes a system controller 301, a memory 302, a convergence controller 303, an amplifier AMP 304, and a signal processor ( 305, a cathode ray tube block 306, an adjustment pattern generator 307, and a key input unit 308.

The cathode ray tube block 306 is formed by the R, G, B cathode ray tubes 306A, 306B, and 306C, the vertical convergence yokes 306D, 306E, and 306F of each cathode ray tube, and the horizontal convergence yokes 306G and 306H of each cathode ray tube. , 306I).

The system controller 301 collectively controls the system, generates information about the size of the television display means, analyzes the convergence adjustment key signal when the convergence adjustment key signal is input from the key input means 308, and generates a convergence adjustment command. Play a role.

The memory 302 stores all the size of the television to be produced, that is, the basic data of convergence of each inch model.

The convergence control unit 303 inputs information about the size of the television display means output from the system control unit 301, and the signal processing unit 305 receives corresponding convergence basic data corresponding to the size of the television display means in the memory 302. After the timing is read out to the applied vertical / horizontal synchronization signal, the convergence correction data at all points is calculated by using a convergence equation (for example, a fourth-order Lagrangian polynomial), which is converted into a converged yoke voltage and output. . When the convergence adjustment command is applied from the system control unit 301, the convergence basic data corresponding to the information on the display means size of the television stored in the memory 302 is updated with the data changed in accordance with the convergence adjustment.

The amplifier 304 amplifies the converged yoke voltage output from the convergence controller 303 with a constant gain.

The signal processor 305 processes the input image signal by a predetermined process, converts the image signal into R, G, and B signals, and outputs the separated image signal.

The cathode ray tube block 306 is composed of R, G and B cathode ray tubes 306A, 306B, and 306C, each cathode ray tube having a vertical / horizontal convergence yoke for deflecting the beam in the vertical and horizontal directions. .

The adjustment pattern generator 307 serves to generate an adjustment pattern signal for convergence adjustment when a convergence adjustment command is applied from the system controller 301.

In the present invention, the adjustment pattern generator 307 is installed inside the television. However, in some cases, the adjustment pattern generator 307 may be installed outside the television and input and used only through the video input terminal in the convergence adjustment mode.

The key input unit 308 is composed of various key buttons for executing the operation of the television, and also includes a key button for convergence adjustment. Since the convergence adjustment is difficult for the general user, it is effective to design the keyboard for the convergence adjustment so that it can be used only during the production adjustment process or after-sales service.

The convergence control unit 303 and the memory 302 can be designed as an IC for convergence control, which is a single integrated circuit.

Next, the operation of the convergence correction method according to the present invention will be described.

First, when the convergence adjustment mode is selected by the key input unit 308, the system control unit 301 analyzes the key data input from the key input unit 308, and then converges to the adjustment pattern generation unit 307 and the convergence control unit 308. Information about the adjustment command and the size of the display means of the model is output.

Accordingly, the adjustment pattern generation unit 307 outputs the pattern signal for the convergence adjustment to the signal processing unit 305, and the signal processing unit 305 converts the input convergence adjustment pattern signal into the R, G, and B signals to produce a cathode ray. The R, G, B cathode ray tubes 306A, 306B, and 306C of the tube block 306 are outputted. The signal processing unit 305 separates the vertical / horizontal synchronization signal of the convergence adjustment pattern signal and outputs it to the convergence control unit 303.

The convergence control unit 303 retrieves the convergence basic data corresponding to the information on the size of the display means input from the system control unit 301 in the memory 302, reads the timing data in a vertical / horizontal synchronization signal, and then converges. The convergence correction data at all points is calculated by the equation, and then converted into a converged yoke voltage and output.

The convergence yoke voltage output from the convergence control unit 303 is amplified by a certain gain in the amplification unit 304 and then applied to the vertical / horizontal convergence yokes 306D to 306I of the R, G and B cathode ray tubes 306A, 306B, and 306C. By adjusting the vertical / horizontal deflection of the beam applied to each cathode ray tube, the R, G, and B beams are adjusted to match one point. The convergence basic data of the memory 302 is changed according to the convergence adjustment. After the convergence adjustment is completed, the convergence basic data corresponding to the size of the display means of the memory 302 is updated with the changed convergence basic data after the convergence adjustment.

In this manner, the convergence adjustment mode is executed. In the normal mode other than the convergence adjustment mode, the memory 302 retrieves the convergence basic data corresponding to the information about the size of the television display means applied from the system control unit 301. After reading, the convergence correction data at all points is calculated by the convergence equation, and then converted into the converged yoke voltage and outputted. After passing through the amplification unit 304, it is applied to the vertical / horizontal convergence yokes of the R, G, and B cathode ray tubes. To correct the deflection of the beam.

This operation makes it possible to produce a single convergence control IC regardless of the display means size of the television and to correct the convergence.

As described above, according to the present invention, a convergence control IC including a memory and a convergence control unit for storing all the convergence basic data for each size of the television display means to be produced is developed, and a single common model is used for the derivative model for each size of the display means. By applying the convergence control IC of, firstly, it is not necessary to design the convergence control IC for each display size, which can reduce the design cost, and secondly, it is necessary to manage the replacement of the convergence control IC for each model at the time of production. There is no effective management cost can be reduced.

Claims (4)

In the convergence correction device of the television, A memory for storing convergence basic data for each display means size of the television; A system controller for generating a convergence adjustment command corresponding to the information on the display means size of the television and the input convergence adjustment key data; And A convergence control unit for generating convergence yoke voltage by reading convergence basic data corresponding to information on the display means size of the television transmitted from the system control unit from the memory, and calculating convergence correction data by a predetermined convergence equation. Size-specific convergence correction device of the television display means comprising a. The convergence basic data according to claim 1, wherein, when the convergence adjustment command is input, the convergence control unit converts the convergence basic data corresponding to the information about the display means size of the television stored in the memory into the convergence basic data changed according to the convergence adjustment. And a size-specific convergence correction device for television display means, characterized in that for updating. The apparatus of claim 1, wherein the memory and the convergence control unit are designed as a single convergence control IC. The apparatus according to claim 2, further comprising an adjustment pattern generator for generating a convergence adjustment pattern signal when the convergence adjustment command is generated.