KR19990004716A - TV's Semi-Transparent Screen Anti Shake Device - Google Patents

Abstract

According to the present invention, a blanking state is always maintained for the boundary screen area of the semi-transparent screen when the semi-transparent screen is formed for an execution state or a function setting state for a predetermined function of the television, thereby preventing the shaking of the screen. Provides a semi-transparent screen anti-shake device for television.

To this end, the present invention provides a VCO / PLL circuit 12 for voltage controlled oscillation and PLL operation by a horizontal synchronous signal HS separated from the synchronous separator 10, and a vertical synchronous separated from the synchronous separator 10. A synchronous control circuit 14 and a microcomputer 42 which receive a signal VS and perform a control for synchronizing a generation processing state of the fast blanking signal FB by the synchronous clock signal from the VCO / PLL circuit 12; The semi-transparent processing unit 16 which performs semi-transparent processing for displaying a predetermined functional state under the display control of < RTI ID = 0.0 > and < / RTI > the fast blanking signal FB and the predetermined functional state display from the character memory 18 according to the semi-transparent processing. A semi-transparent screen display processing apparatus for a television having a display signal converting section 20 that performs a display signal processing on a color character text signal RGB for a display, wherein the path through the display signal converting section 20 passes. First to fourth signal buffer means 22, 24, 26, 28 for buffering output to the blanking signal FB and color character character signal RGB, and the first to fourth signal buffer means 22, First to fourth signal delay means (30, 32, 34, 36) for delaying each of the fast blanking signal FB and the color character character signal RGB through the 24, 26, 28 by a predetermined delay period; And receiving the fast blanking signal FB through the fourth signal buffer means 28 and the fast blanking signal FB delayed by a predetermined delay period through the fourth signal delay means 36, respectively. And a blanking signal comparison processing means 38 for performing the following operations; The blanking signal BL generated according to the comparison processing result of the blanking signal comparison processing means 38 causes screen blanking of the boundary area of the semi-transparent screen by one vertical image line.

Description

TV's Semi-Transparent Screen Anti Shake Device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semi-transparent screen anti-shake device of a television. More particularly, the invention relates to a semi-transparent screen on a television when a semi-transparent screen is reproduced for display of a predetermined functional state or operation state. The present invention relates to a semi-transparent screen shake prevention device of a television for preventing a screen shake phenomenon.

In general, televisions have various functions in addition to a broadcast play function for receiving a television broadcast signal of a plurality of broadcast channels and playing a video / audio through a CRT and a speaker. A broadcast channel switching function and a contrast of a video signal are provided. It has various functions such as adjustment of video level such as brightness or color, volume control for voice signal, wake up and sleep reservation.

On the other hand, the necessity of the screen display so that the viewer can check the function execution state or the setting state of the predetermined function for the various functions, a semi-transparent (Half Blanking) as a way to display the screen so that the function can be confirmed Or Semi-Transparent) display method has been proposed and applied.

FIG. 1A is a diagram illustrating a display state of a first semi-transparent screen in a general television, and according to the drawing, when a predetermined function execution state such as ABC CH 101 is to be displayed on a screen, After the display signal (CD) for the function execution status is displayed on the assigned semi-transparent screen, the fast blanking signals (FB1 to FB5) for each image line for the semi-transparent screen region are set for a predetermined period. As shown in FIG. 1B, for example, as shown in FIG. 1B, the second fast blanking signal FB2 is generated while blanking is performed on the image line on which the second fast blanking signal FB2 is displayed. The semi-transfer run is made by reproducing the image line around the image line to be displayed as a normal image scanning line. The effect is to make it happen.

2A is a diagram illustrating a display state of a second semi-transparent screen in a general television, and according to the drawing, unlike the first semi-transparent screen as shown in FIG. For each dot or pixel, the fast blanking signals FB are alternately displayed for a predetermined period, and the screens are displayed.For each image line in each semi-transparent screen area, the fast blanking signals FB are replaced for each dot. As shown in Fig. 2B, the fourth image line L4 has a blanking indication of the display signal CD4 for a predetermined function execution state, as shown in Fig. 2B, and the fast blanking signal FB per dot. By allowing the waveforms to appear superimposed, the semitransparent effect can be generated.

However, in the first and second semi-transparent screens of the television as shown in Figs. 1A and 2A, the fast blanking signal is generated per one video line or one dot per predetermined period on the area of each semi-transparent screen. Since the screens are interchanged with each other, there is a problem that the boundary area of the semi-transparent screen appears to be shaken, which acts as an obstacle for viewing.

Accordingly, the present invention has been made in view of the above circumstances, and the blanking state is always set for the boundary screen area of the semi-transparent screen when the semi-transparent screen is formed for the execution state or the function setting state for a predetermined function of the television. It is an object of the present invention to provide a semi-transparent screen anti-shake device of a television which is maintained so that the screen phenomenon is prevented.

In order to achieve the above object, according to the semi-transparent screen anti-shake device of the present invention, a VCO / PLL circuit for voltage controlled oscillation and PLL operation by a horizontal synchronous signal separated from a synchronous separation unit, and the synchronous separation A synchronous control circuit which receives a vertical synchronous signal separated from the negative part and performs a control for synchronizing a processing state for generating a fast blanking signal by a synchronous clock signal from the VCO / PLL circuit, and displays a predetermined functional state under display control of a microcomputer. And a semi-transparent processing unit for performing semi-transparent processing for the display signal, and a display signal converting unit for performing display signal processing for the fast blanking signal according to the semi-transparent processing and the color character character signal for displaying a predetermined function state from the character memory. In semi-transparent screen display processing device of television First and fourth signal buffer means for performing buffering output for the fast blanking signal and the color character character signal through the display signal conversion unit, and the respective fast blanking signals and color through the first to fourth signal buffer means. First to fourth signal delay means for delaying the character character signal by a predetermined delay period, and fast blanking signal delayed by the predetermined delay period through the fourth signal delay means and the fast blanking signal through the fourth signal buffer means. Blanking signal comparison processing means for receiving signals and performing signal comparison processing, respectively; The blanking signal generated according to the result of the comparison processing of the blanking signal comparison processing means provides a semitransparent screen anti-shake device of a television configured to screen blank the boundary area of the semi-transparent screen by one vertical image line.

According to the present invention configured as described above, when the display screen for the execution state or setting state of a predetermined function is formed as a semi-transparent screen in a television, blanking is performed by one vertical line with respect to the boundary area of the semi-transparent screen. A line is formed to prevent shaking of the semi-transparent screen.

1A is a view showing a display state of a first semi-transparent screen in a general television;

FIG. 1B is a waveform diagram illustrating a generation state of a fast blanking signal for screen display of a semi-transparent line in the semi-transparent screen shown in FIG. 1A;

2A is a view showing a display state of a second semi-transparent screen in a general television;

FIG. 2B is a waveform diagram illustrating a generation state of a fast blanking signal for displaying a semi-transparent line in the semi-transparent screen shown in FIG. 2A;

3 is a block diagram showing a semi-transparent screen anti-shake device of a television according to the present invention;

FIG. 4 is a diagram illustrating a generation state of a blanking signal for preventing a shaking phenomenon occurring on a boundary area of a semi-transparent screen according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2: tuner, 4: video IF section,

6: image detector, 8: image signal processor,

10: synchronous separator, 12: VCO / PLL circuit,

14: synchronous control circuit, 16: semi-transparent processing unit,

18: character memory, 20: display signal conversion section,

22, 24, 26, 28: output buffer, 30, 32, 34, 36: signal delay,

38: exclusive oragate, 40: function setting section,

42: microcomputer, 44: data memory.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

3 is a block diagram showing a semi-transparent screen anti-shake device of a television according to the present invention. In the apparatus of the present invention, reference numeral 2 denotes a channel for selecting a predetermined broadcast channel from a microcomputer 42, which will be described later. The tuner converts the RF signal of the corresponding broadcast channel into an intermediate frequency signal among the plurality of broadcast channels defined by the reception antenna upon receiving the tuned data, and 4 denotes a TV broadcast signal in the form of the tuned intermediate frequency signal. An image IF portion to be amplified is shown.

In addition, reference numeral 6 denotes an image detector which detects a complex video signal from the intermediate frequency enhanced television broadcast signal, and 8 denotes a multi-stage signal amplification process of the composite video signal detected. Color character signal (RGB) and fast blanking signal received as a result of semi-transparent processing are output as synthesized as a color image signal through brightness adjustment, contrast adjustment, and color demodulation processing for the luminance signal. And an image signal processing unit which synthesizes and outputs the blanking signal BL for blanking the boundary area of the FB and the semi-transparent screen with the color image signal.

In addition, reference numeral 10 denotes a synchronous separator for separating the horizontal / vertical synchronous signal HS / VS from the composite video signal from the image signal processor 8, and 12 denotes the separated horizontal synchronous signal HS. And a VCO / PLL circuit which generates a synchronous clock signal by performing a voltage controlled oscillation operation and a phase locked loop (PLL) operation. 14 denotes a VCO / PLL circuit which is synchronized by receiving a vertical synchronous signal VS from the synchronous separation unit 10. The synchronous control circuit which performs a control operation so that semi-transparent processing is performed in synchronization with the synchronous clock signal from the VCO / PLL circuit 12 is shown.

Reference numeral 16 denotes a semi-transparent controlled by the microcomputer 42, which will be described later, for generating a fast blanking signal FB for generating a half blank screen on the screen display of a predetermined function execution state or function setting state. 18 denotes a processing unit, and 18 denotes color character character data for displaying the execution state or setting state of various various functions, and the execution state or setting state of a predetermined function is processed by the processing operation of the semi-transparent processing unit 16. Represents a character memory that reads out the color character data of the character.

Reference numeral 20 denotes a fast blanking signal FB from the semi-transparent processing unit 16 and the character memory 18 which are synchronized by receiving a synchronous clock signal by synchronous control of the synchronous control circuit 14. And a display signal converting section which performs display signal processing so that color character character data from the screen can be displayed on the screen.

Further, reference numerals 22, 24, 26, and 28 denote first to fourth signal buffers which are buffered by receiving the color character character signal RGB and the fast blanking signal FB from the display signal converter 20. 30, 32, 34, and 36 denote a predetermined delay period for the color character character signal RGB and the fast blanking signal FB, respectively, through the first to fourth signal buffer units 22, 24, 26, and 28, respectively. The first to fourth signal delay units for delaying the signal are shown.

In addition, an exclusive logical sum is received by receiving the fast blanking signal FB through the fourth signal buffer unit 28 and the fast blanking signal FB delayed by a predetermined delay period through the fourth signal delay unit 36. Processing to generate a fast blanking signal FB according to the result, and a blanking signal BL for blanking one vertical image line of the boundary area between the syringes for the boundary area of the semi-transparent screen. ) Denotes an exclusive oragate which is generated to the image signal processing section 8 side.

Reference numeral 40 denotes a function setting unit which is composed of a matrix button unit provided in a remote control remote control unit or a control panel predetermined unit of the main body, and performs a key input operation for executing or setting an overall function assigned to the television.

Further, reference numeral 42 denotes a predetermined function in the semitransparent processing unit 16 based on a control program of the data memory 44 in accordance with a key operation for execution or setting of a predetermined function from the function setting unit 40. The microcomputer performs processing control for reproducing the semi-transparent screen in the execution state or the setting state of the.

Next, the operation of the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, when a television broadcast signal tuned through the tuner 2 and converted into an intermediate frequency signal is subjected to intermediate frequency amplification by the image IF unit 4 and detected by the image detector 6 and separated, The image signal processing unit 8 processes the separated composite image signal as an image signal and outputs the image reproducibly as a color image signal.

In this state, when the function setting section 40 performs a key operation for switching the broadcast channel, the microcomputer 42 recognizes the key input of the function setting section 40 and controls the control program of the data memory 44. On the basis of the tuner 2, the channel selection data for the tuning of the corresponding broadcast channel is applied to the channel, so that channel switching is performed to the corresponding broadcast channel, and the semi-transparent processing unit 16 is controlled to control the broadcast channel. The switching state of is controlled to be displayed as a semi-transparent screen.

Accordingly, the semi-transparent processing unit 16 receives the synchronization clock signal generated from the VCO / PLL circuit 12 by the synchronization control circuit 14 to synchronize the semi-transparent display of the switching state of the broadcast channel. The fast blanking signal FB is generated, while the display signal converter 20 switches between the fast blanking signal FB from the semi-transparent processing unit 16 and the broadcast channel from the character memory 18. The color character character data for display is received and the signal conversion process is performed so that the screen can be displayed.

Then, the first to fourth signal buffer units 22, 24, 26, 28 buffer the color character character signal RGB and the fast blanking signal FB from the display signal conversion unit 20, respectively. And the first to fourth signal delay units 30, 32, 34, and 36 are connected to the color character character signal RGB through the first to fourth signal buffer units 22, 24, 26, and 28, respectively. The fast blanking signal FB is delayed and output for a predetermined delay period.

Meanwhile, in the exclusive oragate 38, the fast blanking signal FB from the fourth signal buffer unit 28 and the fast blanking signal delayed by a predetermined delay period through the fourth signal delay unit 36 are performed. FB) is subjected to an exclusive OR to output the fast blanking signal FB in the semitransparent screen region, and the blanking signal so as to complete the screen blanking for one vertical image line of the boundary region of the semitransparent screen. (BL) is generated.

Therefore, the screen blur phenomenon is canceled while the screen vertical boundary area of the semi-transparent screen appearing on the video screen is completely blanked.

According to the present invention made as described above, when displaying the execution state or setting state of a predetermined function on the television as a semi-transparent screen, the boundary area of the semi-transparent screen can be completely blanked. It is possible to eliminate the shaking phenomenon of the screen boundary area generated when the transparent screen is formed.

Claims (2)

The VCO / PLL circuit 12 for voltage controlled oscillation and PLL operation by the horizontal synchronization signal HS separated from the synchronization separator 10 and the vertical synchronization signal VS separated from the synchronization separator 10 Under the display control of the synchronous control circuit 14 and the microcomputer 42 which is applied and performs a control for synchronizing the generation processing state of the fast blanking signal FB by the synchronous clock signal from the VCO / PLL circuit 12, A semitransparent processing unit 16 for performing semitransparent processing for displaying the functional status of the character, and a color character character for displaying the predetermined state of the function from the fast blanking signal FB and the character memory 18 according to the semitransparent processing. In a semi-transparent screen display processing apparatus for a television having a display signal converting section 20 that performs display signal processing for a signal RGB, First to fourth signal buffer means (22, 24, 26, 28) for buffering the fast blanking signal (FB) and the color character character signal (R.G.B) through the display signal conversion section (20); First to fourth signals for delaying each of the fast blanking signal FB and the color character text signal RGB through the first to fourth signal buffer means 22, 24, 26 and 28 by a predetermined delay period; Signal delay means (30, 32, 34, 36), The signal processing is performed by receiving the fast blanking signal FB through the fourth signal buffer means 28 and the fast blanking signal FB delayed by a predetermined delay period through the fourth signal delay means 36, respectively. Blanking signal comparison processing means 38; The blanking signal BL generated according to the comparison processing result of the blanking signal comparison processing means 38 causes the screen blanking of the boundary area of the semitransparent screen by one vertical image line. Anti Shake Device. The apparatus of claim 1, wherein the blanking signal comparison processing means (38) is made of an exclusive oragate.