KR20010010325A - Method for controlling digital dynamic focus of television - Google Patents

Abstract

PURPOSE: A method for regulating digital dynamic focus of a television set, is provided to output a pattern preset for focus regulation in each regulation point preset on a screen in order to make a regulator confirm a focus regulation state of each regulation point, and to generate a focus signal of an entire screen on the basis of values of regulation points by a digital interpolation method to generate a digital focus signal, so that an optimum focus state can be maintained. CONSTITUTION: A pattern preset for focus regulation in each regulation point preset on a screen, to make a regulator confirm a focus regulation state of each regulation point. Regulation values of each regulation point are inputted by an operation of a regulation apparatus of the regulator. A focus value of entire screen is generated by a digital interpolation method by using the regulation values of each regulation point. The generated focus value of the entire screen are converted to analog to generate a dynamic focus waveform.

Description

How to control digital dynamic focus on television {METHOD FOR CONTROLLING DIGITAL DYNAMIC FOCUS OF TELEVISION}

TECHNICAL FIELD The present invention relates to television, and in particular, to a method of controlling digital dynamic focus.

In general, a television system using a CRT may require a dynamic focus control circuit for correcting the focus of the center portion and the peripheral portion of the screen. In high-vision color monitors and high-definition televisions (HD-TVs), horizontal and vertical parabola signals are applied to dynamic focus circuits to deflect the electron beam output from the electron gun so that the electron beam is precisely focused on the fluorescent surface. .

1 is a schematic block diagram of a conventional television digital dynamic focus control circuit, and FIG. 2 is an exemplary input / output waveform of each functional unit in FIG. 1. Referring to FIG. 1, the conventional dynamic focus control circuit is an analog circuit system, and includes a horizontal synchronous integrating circuit 10 that receives a horizontal synchronizing signal H-SYNC and integrates it to generate a horizontal parabola waveform. V-SYNC) is inputted and integrated into a vertical synchronous integrating circuit 12 for generating a vertical parabola waveform and the output waveforms of the horizontal and vertical synchronous integrating circuits 10 and 12 and synthesized therein. It is composed.

Vertical and horizontal synchronizing signals separated from the video signal, as shown in Figs. A and B of Fig. 2, respectively, are integrated through the horizontal and vertical synchronizing integrated circuits 12, respectively, to A 'and B' of Fig. 2, respectively. Vertical and horizontal parabola signals as shown are generated. The generated vertical and horizontal parabola signals are synthesized through the synthesizing circuit 14 to generate a dynamic focus control signal as shown in FIG.

However, in the generation method of the dynamic focus control signal as described above, the dynamic focus control signal is determined by the component values applied at the time of product development, and thus it is impossible to adjust the characteristic focus according to each set. In addition, since the parabolic waveforms were made through the integrating circuits 10 and 12, the accurate parabolic waveforms according to the characteristics of each set could not be generated. In addition, since the adjustment for each set is impossible, the same focus cannot be maintained throughout the entire screen, resulting in deterioration of image quality.

Accordingly, an object of the present invention is to provide a digital dynamic focus control method capable of optimal focus adjustment for each television set.

Another object of the present invention is to provide a digital dynamic focus control method of a television capable of generating accurate parabolic waveforms.

Another object of the present invention is to provide a digital dynamic focus control method of a television capable of maintaining the same focus on the entire screen.

In order to achieve the above object, the present invention provides a digital dynamic focus control method for a television, by outputting a preset pattern for focus adjustment at each preset adjustment point position on a screen, thereby allowing the adjuster to check the focus adjustment state of each adjustment point. Receive an adjustment value of each adjustment point by manipulation of an adjustment mechanism of an adjuster, generate a focus value of the entire screen by a digital interpolation method using the adjustment values of each adjustment point, Analog conversion of the focus value produces a dynamic focus waveform.

1 is a schematic block diagram of a conventional television digital dynamic focus control circuit;

2 is an exemplary input / output waveform of each functional unit in FIG. 1;

3 is a schematic overall block diagram of a digital television to which an embodiment of the present invention is applied;

4 is a schematic block diagram of a television digital dynamic focus control circuit according to an embodiment of the present invention;

5 is a schematic flowchart of a television digital dynamic focusing process according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details such as specific components are shown, which are provided to help a more general understanding of the present invention, and it is understood that these specific details may be changed or changed within the scope of the present invention. It is self-evident to those of ordinary knowledge in Esau.

3 is a schematic block diagram of a digital television to which an embodiment of the present invention is applied and is a block diagram of a high definition television (HDTV) employing a moving picture expert group (MPEG) standard. Referring to FIG. 1, a tuner 102 inputs a digital TV broadcast signal received through an antenna 100 to tune a channel under the control of a microcomputer 124 and an IF (Intermediate Frequency) signal according to the tune. Outputs The IF module 104 converts the IF signal output from the tuner 102 into a baseband signal. The channel decoder 106 reproduces the data bit stream by channel decoding the baseband signal output from the IF module 104. The TS (Transport Stream) decoder 108 separates audio data, video data and additional data from the data bit string reproduced by the channel decoder 106. The audio data among the separated data is applied to the audio decoder 110, decoded according to the MPEG standard or the Dolby AC-3 standard, processed by the audio processing unit and the output unit 112, and then the speaker 114 is moved. Is output through voice. The video data is applied to the video decoder 116, decoded according to the MPEG standard, and applied to the OSG (On Screen Graphic) Mixer 118 and merged with the OSG data under the control of the microcomputer 124 to process and output the video. After processing in the unit 120 is output on the screen through the water pipe 122. The OSG data is data for the microcomputer 124 to display various types of information on the screen as a graphic or a text.

In addition, a keypad 130 and an IR receiver 134 are connected to the microcomputer 124, which is a control unit of the HDTV receiver, through a user interface 128. The microcomputer 124 performs an operation according to a command input from the remote controller 132 through the keypad 130 or the IR receiver 134 according to a program stored in the memory unit 126. In addition, the memory unit 126 may include a read only memory (ROM) for storing a program of the microcomputer 124 and a random access memory (RAM) for temporarily storing data according to program execution of the microcomputer 124. And EEPROM (Electrically Erasable And Programmable ROM) for storing various reference data.

4 is a schematic block diagram of a television digital dynamic focus control circuit according to an embodiment of the present invention. Referring to FIG. 4, the adjustment point output circuit 20 displays an adjustment pattern on an appropriately arranged adjustment point on the screen to confirm the focus state of each adjustment point, and the adjustment point adjustment circuit 22 is a remote controller. It is a circuit that converts the focus values of the adjustment points using digital control buttons into digital values.

The digital interpolation circuit 24 generates digital focus signals between screen light bulbs using the adjusted values of the respective adjustment points, and the digital / analog conversion circuit (D / A) 26 generates the digital interpolation circuit 24 in the digital interpolation circuit 24. The digital values are converted into analog signals to generate a dynamic focus control circuit.

5 is a schematic flowchart of a television digital dynamic focusing process according to an embodiment of the present invention. Referring to FIG. 5, in step 30, the controller outputs a preset pattern for focus adjustment at each adjustment point position on the screen so that the adjuster can check the focus adjustment state of each adjustment point. In step 32, the adjuster adjusts an adjustment mechanism such as a remote controller. The adjustment is made so that the focus state of each adjustment point becomes the best using. The act of adjustment is then recorded on the circuit as a digital value.

In step 34, the focus value of the entire screen is generated by the digital interpolation method using the adjustment values of each adjustment point. In step 36, the focus value of the entire screen is generated by the digital / analog conversion circuit 26. You will create a focus waveform.

All processes as shown in FIG. 5 are performed in real time, and the adjuster adjusts the focus while checking the focus adjustment state of the screen.

By the above-described configuration and operation, the digital dynamic focus control process of the television according to the characteristics of the present invention may be performed.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but by the equivalents of the claims and claims.

As described above, the present invention adjusts the focus in real time while viewing the screen of each television, so that the best focus state can be set for each television set. In addition, since the digital interpolation method generates the focus signal of the entire screen based on the adjustment point value, it is possible to improve the focus state by generating a complex type of digital focus signal that could not be produced by analog circuits. You can also adjust the focus of your television set in real time to ensure that you always have the best focus.

Claims (2)

In the digital dynamic focus control method of a television, Outputting a preset pattern for focus adjustment at each preset adjustment point position on the screen so that the adjuster can check the focus adjustment state of each adjustment point; Receiving an adjustment value of each adjustment point by manipulation of the adjustment mechanism of the adjuster; Generating a focus value of the entire screen by a digital interpolation method using the adjustment values of the respective adjustment points; And digitally converting a focus value of the entire generated screen to generate a dynamic focus waveform. The method of claim 1, wherein all the operations are performed in real time.