KR19990001467A - How to adjust the convergence on the rear projection TV - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting convergence in a rear projection type TV for facilitating convergence adjustment in a large projection TV. .

In the conventional convergence adjustment, the convergence correction is performed based on the entire displayed screen. As the screen size increases, the convergence adjustment of the entire screen is limited because the field of view of the set front adjuster is limited to a part of the entire screen. In order for the controller to move up and down and to the left and right, or the movement of the set itself is accompanied by the difficulty of accurate adjustment is followed.

In the present invention, in order to solve the problems as described above, in the convergence correction of a large screen, after performing the convergence correction using the sub-screen, by applying the result to the main screen using the result of the adjuster This allows for complete convergence adjustments at the desired location regardless of the position, height, or screen size of the.

Description

A method of adjusting convergence in a rear projection TV.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting convergence in a rear projection type TV for facilitating convergence adjustment in a large projection TV. .

First, the configuration of a convergence adjusting device in a conventional rear projection TV will be described with reference to FIG. 1.

PLL unit (1) for generating a clock signal required for the system by using horizontal and vertical synchronization signals (H-BLK, V-BLK) supplied from the deflection unit, and adjustment necessary for adjusting the screen by receiving the clock signal. An adjustment pattern generation section 2 generating a pattern, an adjustment point cursor generation section 3 receiving the clock signal to generate an adjustment point cursor signal, and an adjustment point pattern and an adjustment point cursor signal supplied with a desired convergence adjustment section A mixing unit 4 for outputting the signal on the screen, an address generator 5 for supplying an address to the first memory unit 6 for receiving the clock signal and specifying a desired convergence adjustment position on the screen; The second memory unit 7 storing the standard data for adjustment, and controlling the system collectively, and changing the adjustment value stored in the second memory unit 7 according to a user's input of the adjustment key. Central processing From the section 8, the D / A (Digital / Analog) converter 9 for converting the adjustment data output from the first memory unit 6 into an analog signal, and from the D / A converter 9 A low pass filter 10 for shaping the waveform by low pass filtering the output analog signal, an amplifying unit 11 for amplifying and outputting at an appropriate level output from the low pass filter 10, and an output from the amplifying unit 11 A convergence output amplifier 12 receives the signal and amplifies it into a signal of a desired size to flow to the convergence yoke 13.

The conventional convergence adjusting device configured as such a component generates a clock required by the system in the PLL unit 1 by using the horizontal synchronizing signal H-BLK and the vertical synchronizing signal V-BLK supplied from the deflection unit. Let's go.

The adjustment pattern generation unit 2 and the adjustment point cursor generation unit 3 receive the clock signal generated by the PLL unit 1 as described above to generate the adjustment pattern and adjustment point cursor signals necessary for screen adjustment.

The adjustment pattern and the cursor signal generated in this way are supplied from the mixing unit 4 to output the desired convergence adjustment portion on the screen.

In addition, the address generator 5 receives a clock signal output from the PLL unit 1 and supplies an address to the first memory unit 6 to designate a desired convergence adjustment position on the screen.

At this time, the convergence adjustment standard data is stored in the second memory unit 7, which is an E ² PROM, and the standard data stored in the second memory unit 7 as described above in the central processing unit 8 for the key signal input by the user. Is stored in the first memory unit 6.

That is, when a user inputs an adjustment key to adjust an arbitrary data value, the central processing unit 8 compares the initial value stored in the second memory unit 7 and calculates the increase / decrease data according to the result. The new data value is stored in the memory unit 6.

In this way, the adjustment data stored and output from the first memory unit 6 is converted into an analog signal through the D / A converter 9, and the low-frequency range of the analog signal converted from the D / A converter 9 is output. It is filtered and formalized.

After that, the standardized signal is amplified by the amplification unit 11 at an appropriate level, and the output signal of the amplified amplification unit 11 is amplified again into a signal having a final desired size by the convergence output amplification unit 12. If it flows through the convergence yoke 13, it will appear on the screen for each of R, G and B CRTs.

However, in the conventional convergence adjustment, since the convergence correction is made based on the entire displayed screen, the larger the screen size is, the larger the screen size of the set front adjuster is limited to a part of the entire screen. In order for the controller to move up, down, left and right, or the movement of the set itself is accompanied, the difficulty of accurate adjustment is followed.

In the present invention, in order to solve the problem as described above, in the convergence correction of a large screen, after performing the convergence correction using the sub-screen, by using the result of the adjustment to adjust the controller so that the convergence can be made The goal is to allow complete convergence adjustments at the desired location regardless of the position, height, or screen size of the.

1 is a block diagram of a convergence adjusting device in a conventional general rear-projection TV.

Figure 2 is a flow chart showing the execution process of the convergence adjustment method in the rear-projection type TV (TV) of the present invention.

Referring to Figure 2 of the accompanying drawings, the execution process of the convergence adjustment method in the rear-projection type TV (TV) of the present invention for achieving the above technical object is as follows.

Determining the convergence adjustment mode by searching the current screen state when the user's adjustment key is input;

A main / sub screen switching process of switching between the main screen and the sub-screen when the mode determined according to the search result is the adjustment mode;

Removing the sub-screen by releasing the adjustment mode after executing the main / sub screen switching process and displaying the sub-screen in which the existing adjustment data is stored as the main screen;

A mode switching process for switching to the adjustment mode when the mode determined according to the search result is the normal mode;

The main / sub switching process for switching the main adjustment to the sub picture adjustment mode,

A key input determination process for inputting user's convergence adjustment data;

If it is determined that there is no data input by the user, executing the adjustment mode process to execute convergence adjustment with the existing adjustment data of the sub-screen;

If it is determined that the user enters the data, the process of adjusting the convergence of the sub-screen by the convergence adjustment data input by the user;

When the convergence adjustment is completed after the above process, the main screen and the sub-screen are switched and the sub-screen is deleted.

The convergence adjustment method in the rear projection type TV (TV) of the present invention having such an execution process switches the main screen to a sub-screen without performing the convergence adjustment through a large main screen, and adjusts the convergence through the displayed sub-screen. To make it run,

First, it is determined whether the user's adjustment key is input. When the user selects the adjustment key for convergence adjustment, the central processing unit searches for the state of the currently displayed screen.

If the main screen and the sub screen are displayed together in the central processing unit, the execution of the adjustment mode is executed. If only the main screen is displayed, the normal mode is executed.

In the adjustment mode, the adjustment value of the sub-screen is moved to the main screen, main / sub switching is performed to make the main screen sub-screen, and the adjustment mode is canceled when the main / sub switching is completed.

When the adjustment mode is released, the sub screen disappears, and the sub screen in which the existing adjustment data is stored is displayed as the main screen.

On the other hand, in the normal mode made when only the main screen is displayed, the screen is switched to the adjustment mode state in which the main screen and the sub screen are displayed.

At this time, the sub-screen does not matter what screen is displayed, the main screen must implement a cross-hatch pattern (Cross-Hatch pattern), the implementation method may be various.

It is possible to implement various cross hatches by using OSD method, pre-stored in-house signal, separate pattern device, etc. And considering all conditions, using OSD is most advantageous.

When the adjustment mode is in this manner, the next step is to switch between the main screen and the sub-screen, and execute the sub-screen adjustment mode in which the adjustment data can be changed on the sub-screen to complete the detailed convergence adjustment preparation.

In this state, the user inputs a data adjustment key for adjustment and adjusts the convergence through the technical configuration as in FIG. 1. In the case where such a key input is not desired, the same procedure as in the above adjustment mode process is performed. The adjustment is completed through.

Here, the size and position of the sub-screen in the adjustment mode of the normal mode can be implemented in the size and position desired by the user.

As described above, since the main screen is implemented as a sub-screen at the size and position desired by the user to enable detailed adjustment of the convergence, there is an effect of enabling perfect convergence adjustment regardless of the size and position of the screen.

Claims (2)

Determining the convergence adjustment mode by searching the current screen state when the user's adjustment key is input; A main / sub screen switching process of switching between the main screen and the sub-screen when the mode determined according to the search result is the adjustment mode; Removing the sub-screen by releasing the adjustment mode after executing the main / sub screen switching process and displaying the sub-screen in which the existing adjustment data is stored as the main screen; A mode switching process for switching to the adjustment mode when the mode determined according to the search result is the normal mode; The main / sub switching process for switching the main control to the sub picture adjustment mode, A key input determination process for inputting user's convergence adjustment data; If it is determined that there is no data input by the user, executing the adjustment mode process to execute convergence adjustment with the existing adjustment data of the sub-screen; If it is determined that the user enters the data, the process of adjusting the convergence of the sub-screen by the convergence adjustment data input by the user; When the convergence adjustment is completed after the above process, switching the main screen and the sub-screen, the sub-screen is deleted, characterized in that the process of adjusting the convergence in the rear TV (TV). The method of controlling convergence of a rear projection TV according to claim 1, wherein the sub-screen implemented in the adjustment mode is adjustable to the size and position of the user.