KR20040045565A - Apparatus for, and method of, controlling convergence of projection display using computer - Google Patents

Abstract

PURPOSE: An apparatus and a method for controlling convergence of a projection display using a computer are provided to adjust the convergence easily, accurately and rapidly. CONSTITUTION: A convergence control apparatus(100) includes a mode controller(111) for setting a convergence control mode, a timing generation unit(112) for controlling an input signal to be recognized by a microcomputer(152) of a projection display(150), a computer(110) having a timing output unit(113) for controlling a carrier frequency to transmit the input signal and including a convergence control program, and a timing generator(120) for physically converting the input signal into a signal recognizable by the microcomputer. The apparatus further includes a signal level controller(151) for controlling the level of the converted signal, the microcomputer for generating a control signal in response to the controlled signal, a convergence controller(154) for generating a convergence control signal in response to the control signal, and a convergence driver(155) for generating a horizontal/vertical deflection correction signal in response to the convergence control signal.

Description

Apparatus and method for adjusting the convergence of the projection display using a computer {APPARATUS FOR, AND METHOD OF, CONTROLLING CONVERGENCE OF PROJECTION DISPLAY USING COMPUTER}

TECHNICAL FIELD The present invention relates to projection displays, and more particularly, to an apparatus for adjusting the convergence of a projection display using a computer.

Recently, in a cathode ray tube projection display apparatus using three R (red), G (green), and B (blue) tubes, which are rapidly increasing in demand, such a projection display apparatus is used to express an image in order to express an image. Each of the R, G, and B projection lenses, which project light from each cathode ray tube, presents an image on the screen through a reflecting mirror.

Here, convergence means that each of the R, G, and B light meet at a point on the screen through each projection route. If each of the R, G, and B lights does not collect at a point on the screen, you will not see a more accurate image. Therefore, convergence is an important factor in determining image quality in the projection display, and thus fine adjustment is required.

As shown in FIG. 5, in order to adjust the convergence in the prior art, when the convergence adjustment button of the remote controller (not shown) is pressed, the digital image processing unit 53 outputs a reference signal for color matching (see FIG. 6). When pressing the shift key of the remote controller while watching the reference signal, the position shift signal transmitted from the remote controller is transmitted from the IR receiver 30 to the microcomputer 52.

Here, as shown in Fig. 6, the reference signal is outputted with nine points.

Subsequently, the microcomputer 52 transmits a control signal for convergence adjustment to the convergence adjustment unit 54, and the convergence adjustment unit 54 transmits a correction signal for the cathode ray tube driver 56 to the convergence driver 55.

The cathode ray tube driver 55 corrects the deflection signal generated by the deflection unit 57 with a correction signal output from the convergence driver 55 to match the signals of R, G, and B at one point of the screen.

When projecting an analog signal such as a TV or a VCR with such a conventional projection display, since the effective visible area is about 67% of the real signal area, the start and end portions of the vertical video signal are not visible on the screen. There was no correlation in the error.

However, when inputting a multimedia signal using a computer such as a PC, since 100% of the signal appears in the effective visible area, fine adjustment at the edge of the screen is very difficult with the 9-point reference signal.

In addition, the prior art convergence adjustment device has a disadvantage in that the adjustment takes a long time because the user needs to manually adjust the remote control by referring to the convergence adjustment reference signal.

Therefore, in order to solve the above problem, the present invention provides a convergence adjusting device capable of conveniently, precisely and quickly performing a convergence adjustment that has an important effect on image quality in a cathode ray tube projection display using R, G, and B 3 tubes. It is an object to provide a method.

According to one aspect of the invention, the mode control unit for setting the convergence adjustment mode according to the convergence adjustment program, a timing generator for adjusting the input signal according to each mode to a signal that can be recognized by the microcomputer of the projection display, and the carrier A computer having a timing output unit for controlling the frequency and transmitting the input signal, and having a built-in convergence adjustment program; A timing generator for physically converting the input signal transmitted from the computer into a signal that can be recognized by the microcomputer of the projection display; A signal level controller for adjusting the level of the converted input signal to a predetermined size, a micom for generating a control signal according to the adjusted input signal, a convergence adjusting unit for generating a convergence adjustment signal based on the control signal of the micom; And a projection display having a convergence driver for generating a horizontal / vertical deflection correction signal according to the convergence adjustment signal.

Preferably, the projection display outputs a convergence adjustment screen in response to a control signal from the microcomputer. The apparatus may further include a digital image processor for transmitting a vertical synchronizing signal and a horizontal synchronizing signal to the convergence adjusting unit.

Preferably, the computer further comprises a database unit for storing the convergence adjustment data.

According to another aspect of the invention, the step of transmitting an input signal for the mode, position, movement, etc. from the computer to the microcomputer of the projection display to adjust the convergence of the projection display; Outputting a control signal according to the transmitted input signal from the microcomputer; Generating a convergence adjustment signal by a convergence adjustment unit based on the output control signal; Generating a horizontal / vertical deflection correction signal according to the convergence adjustment signal in a convergence driver; And storing the convergence adjustment data in a database of the computer.

The method may further include outputting a convergence adjustment screen from the digital image processing unit by the control signal of the microcomputer, and transmitting a vertical synchronization signal and a horizontal synchronization signal to the convergence adjustment unit.

1 is a block diagram of an apparatus for adjusting convergence of a projection display using a computer according to a preferred embodiment of the present invention.

2A and 2B are operational flowcharts of an apparatus for adjusting convergence of a projection display using a computer according to a preferred embodiment of the present invention.

3 is a diagram illustrating a convergence adjustment screen output from a digital image processing unit in a convergence adjustment apparatus according to a preferred embodiment of the present invention.

4 is a block diagram showing a convergence adjusting unit in the convergence adjusting apparatus according to the preferred embodiment of the present invention.

5 is a configuration diagram of an apparatus for adjusting convergence of a projection display according to the prior art.

6 is a diagram illustrating a convergence adjustment reference signal output from a digital image processing unit of a projection display according to the prior art.

* Description of the symbols for the main parts of the drawings *

10: convergence adjuster 30: IR receiver

100: convergence adjusting device according to the present invention

110: computer 120: timing generator

151: signal level control unit

As shown in FIG. 1, the convergence adjustment device 100 according to the present invention includes a mode control unit 111 for setting a convergence adjustment mode, and an input signal for each mode is recognized by the microcomputer 152 of the projection display 150. A computer (110) having a timing generation unit (112) for adjusting to a signal capable of being made available, and a timing output unit (113) for controlling the carrier frequency to transmit the input signal; A timing generator (120) for physically converting an input signal transmitted from the computer (110) into a signal that can be recognized by the microcomputer (112) of the projection display (150); On the basis of the signal level control unit 151 for adjusting the level of the converted input signal to a predetermined size, the microcomputer 152 for generating a control signal according to the adjusted input signal, and the control signal of the microcomputer 152 And a projection display 150 including a convergence adjustment unit 154 for generating a convergence adjustment signal, and a convergence driver 155 for generating a horizontal / vertical deflection correction signal according to the convergence adjustment signal.

Hereinafter, a method of adjusting convergence of a projection display using a computer according to the present invention will be described in detail with reference to the accompanying drawings.

2A and 2B show an operation flowchart of the apparatus for adjusting the convergence of the projection display using a computer according to the present invention.

As shown in FIG. 2A, first, the computer 110 switches the convergence adjustment mode to the center adjustment mode (for G color) of the projection display 150 (S1).

When a signal is input to the computer 110 to adjust the center, the timing output unit 113 carries the input signal on a carrier and transmits the signal to the timing generator 120. In the timing generator 120, the transmitted input signal is adjusted to a clock frequency that can be recognized by the microcomputer 152 of the projection display 150, and the level of the input signal is adjusted by the signal level controller 151 (S2).

When this input signal is input to the microcomputer 152, the microcomputer 152 instructs the digital image processing unit 153 to output the convergence adjustment screen. By this command, the digital image processing unit 153 outputs the convergence adjustment screen (see FIG. 3), and transmits the vertical synchronization signal VD and the horizontal synchronization signal HD for the convergence adjustment to the convergence adjustment unit 154 (see FIG. 4). (S3).

Here, as shown in Fig. 3, a total of 64 reference signals are output on the convergence adjustment screen, so that more precise convergence can be adjusted.

Subsequently, movement data (for G color) corresponding to the horizontal synchronization signal and the vertical synchronization signal which are output reference signals are input to the computer 110 (S4).

This movement data is converted as in the center adjustment mode and transmitted to the microcomputer 152 (S5). The microcomputer 152 generates a control signal for the movement data (S6). In accordance with this control signal, the convergence adjustment unit 154 outputs the convergence adjustment signal (S7). In response to this adjustment signal, the convergence driver 155 outputs a vertical / horizontal deflection correction signal (S8).

When the steps S1 to S8 for the G color are performed in the same manner for the B and R colors (S9), fine adjustment for the G color is performed again (S10). This fine adjustment is repeated as in the center adjustment (S11).

Thereafter, the adjustment data is stored in the computer (S12).

As shown in Fig. 2B, after accumulating and summing such data stored in the computer (S13), the accumulated data are averaged (S14), and the initial adjustment data is calculated (S15).

The calculated initial adjustment data is stored in the database unit of the computer (S16).

This initial adjustment data is used as an initial reference signal when adjusting convergence in the production process. That is, in the case of repeating the adjustment adjustment, the initial reference signal stored in the database unit of the computer is stored in the memory of the convergence adjustment unit (for example, the memory of FIG. 4) of other projection displays, so that the convergence initial value of each projection display is increased. Optimal adjustment can be made.

Thus, productivity can be improved by quickly and precisely adjusting the convergence of the projection display.

As described above, the present invention can improve the productivity in producing the R, G, B three-tube cathode ray tube projection display compared to the prior art, and can also make the adjustment of the convergence more precise, so that Sharpness can be improved in the projection display.

While the present invention has been described and illustrated with reference to preferred embodiments, it will be appreciated by those skilled in the art that the present invention is not limited to the above-described embodiments but should be limited only by the appended claims.

Claims (5)

In the apparatus for adjusting the convergence of the projection display, A mode control unit for setting a convergence adjustment mode, a timing generator for adjusting an input signal according to each mode to a signal that can be recognized by a microcomputer of the projection display, and a timing output unit for controlling the carrier frequency to transmit the input signal. A computer incorporating a convergence adjusting program; A timing generator for physically converting an input signal transmitted from the computer into a signal that can be recognized by the microcomputer of the projection display; And A signal level controller for adjusting the level of the converted input signal to a predetermined size, a micom for generating a control signal according to the adjusted input signal, a convergence adjusting unit for generating a convergence adjustment signal based on the control signal of the micom; And a projection display having a convergence driver for generating a horizontal / vertical deflection correction signal according to the convergence adjustment signal. The apparatus of claim 1, wherein the projection display further comprises a digital image processing unit configured to output a convergence adjustment screen according to a control signal from the microcomputer, and to transmit a vertical synchronization signal and a horizontal synchronization signal to the convergence adjustment unit. The apparatus of claim 1, wherein the computer program further comprises a database unit for storing the convergence adjustment signal. Transmitting an input signal for mode, position, movement, etc. from a computer to the microcomputer of the projection display to adjust the convergence of the projection display; Outputting a control signal according to the transmitted input signal from the microcomputer; Generating a convergence adjustment signal by a convergence adjustment unit based on the output control signal; Generating a horizontal / vertical deflection correction signal according to the convergence adjustment signal in a convergence driver; And Storing the convergence adjustment data on the computer. The convergence adjustment method of claim 4, further comprising: outputting a convergence adjustment screen from the digital image processing unit and transmitting a vertical synchronization signal and a horizontal synchronization signal to the convergence adjustment unit according to the control signal of the microcomputer.