KR100247247B1 - Apparatus for controlling horizontal and vertical deflection of crt projector - Google Patents

Abstract

Disclosed is a horizontal and vertical deflection control apparatus of a CRT projector having a plurality of cathode ray tubes (hereinafter referred to as CRTs). According to the present invention, a synchronous signal is received and synchronized with each other to separately output horizontal and vertical deflection currents that perform horizontal and vertical convergence based on preset horizontal and vertical convergence coefficients corresponding to a plurality of cathode ray tubes, respectively. And a deflection yoke portion for receiving horizontal and vertical deflection currents respectively corresponding to the plurality of cathode ray tubes from the means and the deflection means, respectively, to horizontally and vertically deflect the traveling paths of the respective cathode rays in the plurality of cathode ray tubes. Therefore, the present invention does not include a horizontal / vertical convergence unit and a horizontal / vertical convergence yoke unit that consumes a lot of power, and independently control horizontal and vertical deflections with respect to CRTs corresponding to R, G, and B signals. Horizontal and vertical convergence functions can be performed with only the vertical deflection yoke, which simplifies the circuit, lowers the cost, and reduces power consumption.

Description

Horizontal and vertical deflection control device of the CrT projector

The present invention relates to a horizontal and vertical deflection control device of a CRT projector using three cathode ray tubes (CRT), respectively corresponding to red, green, and blue. Horizontal and vertical convergence function with only horizontal / vertical deflection yoke part by independently controlling horizontal and vertical deflection for CRT corresponding to R, G, and B signals without separate vertical / vertical convergence part and horizontal / vertical convergence yoke part It relates to a horizontal and vertical deflection control device of the CRT projector capable of performing.

In general, a CRT projector is provided with a plurality of CRTs corresponding to red, green, and blue, respectively, and the deflection control device is a device for controlling the traveling path of the cathode ray in each of these CRTs. The deflection control device is largely divided into a deflection part and a convergence part. The deflection part serves to deflect the traveling path of the cathode ray in each CRT horizontally and vertically according to the horizontal / vertical synchronization signal, and the convergence part is formed on one screen from each of the CRTs. It serves to match the phases so that they do not deviate from each other. The deflection section is divided into horizontal and vertical deflection sections, and the convergence section is also divided into horizontal and vertical convergence sections.

2, the operation of the prior art horizontal and vertical deflection control device will be briefly described.

Figure 2 is a block diagram showing a horizontal and vertical deflection control device of the prior art. As shown in FIG. 2, the apparatus of FIG. 2 generates horizontal and vertical synchronization signals and outputs them to the horizontal deflection unit 23, the vertical deflection unit 25, the horizontal distortion correction unit 22, and the convergence control unit 27. The part 21 is provided. The sync signal generator 21 is connected with a horizontal distortion compensator 22 that receives the sync signal from the sync signal generator 21 and corrects the horizontal deflection distortion of the horizontal deflector 23. The horizontal distortion correction unit 22 has a horizontal deflection current to the horizontal deflection yoke unit 24 based on the horizontal distortion correction signal input from the horizontal distortion correction unit 22 and the horizontal synchronization signal input from the synchronization signal generator 21. The horizontal deflection portion 23 for outputting is connected. A horizontal deflection yoke unit 24 is connected to the horizontal deflection unit 23 to receive a horizontal deflection current from the horizontal deflection unit 23 and horizontally deflect the traveling path of the cathode ray in each of the R, G, and B CRTs. The synchronous signal generator 21 is connected to a vertical deflector 25 for outputting a vertical deflection current to the vertical deflection yoke 26 based on the synchronous signal input from the synchronous signal generator 21. A vertical deflection yoke unit 26 is connected to the vertical deflection unit 25 to receive a vertical deflection current from the vertical deflection unit 25 and vertically deflect the traveling path of the cathode ray in each of the R, G and B CRTs. In addition, the sync signal generator 21 receives a sync signal from the sync signal generator 21 to output a horizontal and vertical convergence control signal to the horizontal convergence unit 28 and the vertical convergence unit 29, respectively. 27) is connected. The convergence control unit 27 is connected to a horizontal convergence unit 28 that receives a horizontal convergence control signal from the convergence control unit 27 and outputs a horizontal convergence current to the horizontal convergence yoke unit 30. The horizontal convergence yoke unit 30 is connected to the horizontal convergence unit 28 to receive the horizontal convergence current from the horizontal convergence unit 28 and to horizontally change the position of each phase to be formed on each of the R, G, and B CRTs. The convergence control unit 27 is connected to a vertical convergence unit 29 that receives a vertical convergence control signal from the convergence control unit 27 and outputs a vertical convergence current to the vertical convergence yoke unit 31. The vertical convergence unit 29 is connected to the vertical convergence yoke unit 31 that receives the vertical convergence current from the vertical convergence unit 29 and vertically changes the position of each phase formed on each of the R, G, and B CRTs.

First, the horizontal deflection unit 23 and the vertical deflection unit 25 output horizontal and vertical deflection currents to the horizontal deflection yoke unit 24 and the vertical deflection yoke unit 26 according to the synchronization signal input from the synchronization signal generator 21. Are printed respectively. The horizontal deflection yoke unit 24 corresponds to the R, G, and B CRTs one-to-one, and is connected in parallel with each other in the R (Red) horizontal deflection yoke 241, the G (Green) horizontal deflection yoke 242, and B (Blue). The horizontal deflection yoke 243 is provided to uniformly deflect the traveling path of the cathode ray of each corresponding CRT. The vertical deflection yoke unit 26 corresponds to each of the R, G, and B CRTs, and is connected to each other in series with each other by the R vertical deflection yoke 261, the G vertical deflection yoke 262, and the B vertical deflection yoke 263. And uniformly deflect the traveling paths of the cathode rays of the corresponding CRTs. In addition, the horizontal distortion correction unit 22 connected to the synchronization signal generator 21 is horizontally distorted by the E / W (East / West) amplifier 222 according to the synchronization signal input from the synchronization signal generator 21. E / W amplifier 222 which amplifies the horizontal distortion correction signal input from the E / W (East / West) control unit 221 and the E / W control unit 221 and outputs the correction signal to the horizontal deflection unit 23. ) To correct the horizontal distortion of the horizontal deflection portion 23. Meanwhile, the convergence control unit 27 supplies the horizontal and vertical convergence control signals for R, G, and B to the horizontal convergence unit 28 and the vertical convergence unit 29 according to the synchronization signal input from the synchronization signal generator 21. Will be printed respectively. The horizontal convergence unit 28 generates an electric current for driving a horizontal convergence yoke for each of R, G, and B according to the horizontal convergence control signal for each of R, G, and B input from the convergence control unit 27. 281, a G convergence section 282 and a B convergence section 283 are provided to output the horizontal convergence current to each yoke of the horizontal convergence yoke section 30. The horizontal convergence yoke unit 30 includes an R horizontal convergence yoke 301, a G horizontal convergence yoke 302, and a B horizontal convergence yoke 303, according to a horizontal convergence current for each of R, G, and B inputted thereto. R, G, B Horizontally moves the images formed on each CRT. The vertical convergence unit 29 generates an electric current for driving the vertical convergence yoke for each of the R, G, and B according to the vertical convergence control signal for each of the R, G, and B input from the convergence control unit 27. 291, a G convergence section 292 and a B convergence section 293 are provided to output the vertical convergence current to each yoke of the vertical convergence yoke section 31. The vertical convergence yoke unit 31 includes an R horizontal convergence yoke 311, a G horizontal convergence yoke 312, and a B horizontal convergence yoke 313, according to a vertical convergence current for each of R, G, and B inputted thereto. R, G, B Vertically shifts the image on each CRT.

However, the horizontal and vertical deflection control apparatuses of the prior art as described above have a problem in that a circuit is complicated, expensive, and power consumption is large because the horizontal / vertical convergence section and the horizontal / vertical convergence yoke section exist separately.

Therefore, the object of the present invention is to perform the horizontal / vertical convergence function without having to provide a horizontal / vertical convergence unit and a horizontal / vertical convergence yoke separately, the circuit is simple, low cost and low power consumption horizontal and vertical of the CRT projector It is to provide a deflection control device.

1 is a block diagram showing a horizontal and vertical deflection control device according to an embodiment of the present invention,

Figure 2 is a block diagram showing a horizontal and vertical deflection control device of the prior art.

<Description of the symbols for the main parts of the drawings>

11: sync signal generator 12: convergence controller

13: horizontal convergence control unit 131: red E / W amplifier

132: green E / W amplifier 133: blue E / W amplifier

14: horizontal deflection section 15: horizontal deflection yoke section

151: R horizontal deflection yoke 152: G horizontal deflection yoke

153: B horizontal deflection yoke 16: vertical deflection

17: vertical deflection yoke 171: R vertical deflection yoke

172: G vertical deflection yoke 173: B vertical deflection yoke

The horizontal and vertical deflection control device of the CRT projector according to the present invention for achieving the above object is a deflection control device of a CRT projector having a plurality of cathode ray tubes, the synchronization signal is received in synchronization with the preset Horizontal and vertical corresponding to a plurality of cathode ray tubes respectively from deflection means and deflection means for separately outputting horizontal and vertical deflection currents that perform horizontal and vertical convergence based on the horizontal and vertical convergence coefficients corresponding to the plurality of cathode ray tubes, respectively. It includes a deflection yoke portion for receiving the deflection current individually and horizontally and vertically deflect the traveling path of each cathode ray in the plurality of cathode ray tubes.

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

1 is a block diagram showing a horizontal and vertical deflection control apparatus of a CRT projector according to an embodiment of the present invention. As shown, the apparatus of FIG. 1 includes a synchronization signal generator 11 for generating horizontal and vertical synchronization signals and outputting them to the horizontal deflection portion 14, the vertical deflection portion 16 and the convergence control portion 12. . The synchronization signal generator 11 has a horizontal convergence according to the synchronization signal input from the synchronization signal generator 11 based on the horizontal / vertical convergence coefficient and the horizontal distortion correction coefficient for each of R, G, and B set by the user. A convergence control unit 12 for outputting the control signal and the distortion correction control signal to the horizontal convergence control unit 13 and the vertical convergence control signal to the vertical deflection unit 16 is connected. The convergence control unit 12 supplies the horizontal convergence signal and the horizontal distortion correction signal for each of the R, G, and B according to the horizontal convergence control signal and the distortion correction control signal for each of the R, G, and B inputted from the convergence control unit 12. The horizontal convergence control unit 13 outputs to the horizontal deflection unit 14 is connected. The horizontal convergence control unit 13 has a horizontal convergence signal for each of R, G, and B input from the horizontal convergence control unit 13, a horizontal distortion correction signal, and a horizontal synchronous signal input from the synchronization signal generator 11. A horizontal deflection portion 14 for outputting a horizontal deflection current for each of R, G, and B to the horizontal deflection yoke portion 15 is connected. The horizontal deflection unit 14 horizontally deflects the traveling path of each cathode ray in the CRT corresponding to each of R, G and B according to the horizontal deflection current with respect to each of R, G and B inputted from the horizontal deflection unit 14. The horizontal deflection yoke 15 is connected.

On the other hand, the convergence control unit 12 supplies a vertical deflection current for each of R, G, and B to the vertical deflection yoke unit 17 according to the vertical convergence control signal for each of R, G, and B input from the convergence control unit 12. The output of the vertical deflection portion 16 is connected. The vertical deflection unit 16 vertically deflects the traveling path of each cathode ray in the CRT corresponding to each of R, G and B according to the vertical deflection current with respect to each of R, G and B input from the vertical deflection unit 16. The vertical deflection yoke 17 is connected.

The operation of the apparatus of the present invention configured as described above will be described in more detail.

The convergence control unit 12 is horizontal in accordance with the horizontal and vertical synchronization signals input from the synchronization signal generator 11 based on the horizontal / vertical convergence coefficient and the horizontal distortion correction coefficient for each of R, G, and B set by the user. The convergence control unit 13 outputs the horizontal convergence control signal and the horizontal distortion correction control signal for each of the R, G, and B, and the vertical deflection unit 16 outputs the vertical convergence control signal for each of the R, G, and B. . The horizontal convergence control unit 13 includes a red E / W (East / West) amplifier 131, a green E / W amplifier 132, and a blue E / W amplifier 133, respectively, for R, G, and B signals. The horizontal convergence control signal and the horizontal distortion correction control signal are respectively input to the horizontal deflection unit 14 to amplify and output the horizontal convergence signal and the horizontal distortion correction signal corresponding to the R, G, and B signals, respectively. The horizontal deflection unit 14 receives a horizontal convergence signal and a horizontal distortion correction signal corresponding to the R, G, and B signals from the horizontal convergence adjusting unit 13, respectively, and outputs the horizontal synchronization signal input from the synchronization signal generating unit 11 to the horizontal synchronization signal. In synchronism, the horizontal deflection current, which has undergone horizontal convergence and horizontal distortion correction for each of R, G, and B, is outputted to the horizontal deflection yoke unit 15. The horizontal deflection yoke unit 15 receives horizontal deflection currents corresponding to the R, G, and B signals, respectively, and horizontally deflects the traveling paths of the cathode rays in the CRTs corresponding to the R, G and B signals, respectively.

On the other hand, the vertical deflection unit 16 receives the vertical convergence signal corresponding to the R, G, and B signals from the convergence control unit 12, respectively, and synchronizes the R, G in synchronization with the vertical synchronization signal input from the synchronization signal generation unit 11. The vertical deflection current, which has undergone vertical convergence for each of B and B, is output to the vertical deflection yoke unit 17. The vertical deflection yoke unit 17 receives a vertical deflection current corresponding to the R, G, and B signals, respectively, and vertically deflects the traveling path of each cathode ray in the CRT corresponding to the R, G, and B signals, respectively.

As described above, in the horizontal and vertical deflection control apparatus of the CRT projector, the present invention can perform horizontal / vertical convergence without providing a separate horizontal / vertical convergence section and a horizontal / vertical convergence yoke section, thereby simplifying a circuit. The price is lower and power consumption is reduced.

Claims (4)

In the deflection control device of a CRT projector having a plurality of cathode ray tubes, The plurality of cathode ray tubes are configured to receive a synchronization signal and synchronize the horizontal and vertical deflection currents separately corresponding to the plurality of cathode ray tubes based on preset horizontal and vertical convergence coefficients. Deflecting means for outputting respectively corresponding to the deflection means; And A CRT projector comprising a deflection yoke for individually receiving horizontal and vertical deflection currents corresponding to the plurality of cathode ray tubes from the deflection means, respectively, to horizontally and vertically deflect the traveling paths of the cathode rays in the plurality of cathode ray tubes. Horizontal and vertical deflection control device. 2. The horizontal / vertical convergence control according to claim 1, wherein the deflection means receives a synchronization signal and synchronizes with the synchronization signal based on a preset horizontal / vertical convergence coefficient and horizontal distortion correction coefficient. A convergence control unit for outputting a signal and a horizontal distortion correction control signal, respectively; A horizontal convergence adjusting unit which receives a horizontal distortion correction control signal and a plurality of horizontal convergence control signals from the convergence control unit and outputs a horizontal convergence corrected signal corresponding to the plurality of cathode ray tubes respectively based on the horizontal distortion correction control signal; A plurality of horizontal deflections which receive a horizontal synchronization signal and generate a plurality of horizontal deflection currents corresponding to the plurality of cathode ray tubes, and synthesize the horizontal deflection signals respectively output by the horizontal convergence control unit to perform horizontal convergence A horizontal deflection portion for outputting current corresponding to the plurality of cathode ray tubes, respectively; And A plurality of vertical deflection currents corresponding to the plurality of cathode ray tubes generated in synchronization with the vertical synchronization signal and subjected to vertical convergence on the basis of the plurality of vertical convergence control signals output from the convergence controller; And a vertical deflection portion for outputting a vertical deflection current corresponding to the plurality of cathode ray tubes, respectively. The horizontal convergence control unit according to claim 2, wherein the horizontal convergence control unit receives horizontal convergence control signals corresponding to the plurality of cathode ray tubes from the convergence control unit and amplifies them individually to output horizontal convergence signals corresponding to the plurality of cathode ray tubes. Horizontal and vertical deflection control device of a CRT projector, characterized in that it comprises a plurality of E / W amplifier. 2. The apparatus of claim 1, wherein the deflection yoke unit comprises: a horizontal deflection yoke unit for horizontally deflecting a traveling path of each cathode ray in the plurality of cathode ray tubes receiving a plurality of horizontal deflection currents output from the deflection means; And And a vertical deflection yoke for receiving a plurality of vertical deflection currents output by the deflection means and vertically deflecting the traveling paths of the cathode lines in the plurality of cathode ray tubes. .

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