KR20000003667A - Method of displaying a screen of a pdp television - Google Patents

Abstract

PURPOSE: A method of displaying a screen of a PDP(Plasma Display Panel) television set is provided to process a PDP screen of a channel, on which a broadcast signal is not provide, with a predetermined color or image. CONSTITUTION: The method comprises steps of: detecting a broadcast signal on a channel with a tuner(100); determining whether the broadcast signal on the channel exists or not; displaying the detected broadcast signal on the PDP screen when the broadcast signal exists; and displaying a predetermined color signal or image on the PDP screen when the broadcast signal does not exist. Thereby, it is possible to provide a watcher with a comfort screen by displaying a comfort color or image signal on the PDP screen instead of a noise signal when the broadcast signal does not exist.

Description

How to display screen of PDTV

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen display method of a plasma display panel (PDP) TV, and more particularly, to a screen display method for blue-backing a screen when no signal is input to a tuning channel.

Among the various display devices that are applied to various fields, cathode ray tubes that can display clearly, colorize, operate easily, and have low manufacturing costs are used in many fields, but the cathode ray tubes themselves are Frasco (Frasco). ) Has a structure of the form, it is large in size and requires a high operating voltage of approximately 10,000V. There is a disadvantage that display distortion occurs.

Therefore, recently, a so-called flat display device having a large display area and a small volume has been researched and developed. For example, active elements such as EL (Electro Luminescence), LED (Light Emitting Diode), PDP, and liquid crystal (LCD) Passive devices such as displays (ECDs) and electrochromic displays (ECDs) are typical flat display devices.

In particular, the PDP display device has a memory function that continues discharge when the input pulse is input once, and the display point is defined by the matrix structure, so that there is no distortion of the image, and the light emission frequency is high at 50-100KHz, so there is no flickering advantage. The present invention relates to a technique for displaying a broadcast signal using such a PDP.

In general, plasma refers to three phases of a substance, that is, another state different from the solid, liquid, and gaseous states. Here, the substance in the gaseous state is energized by external force, such as voltage, to be ionized ( Electron is separated), and the plasma display may be a device that displays text, graphics, or images by using a glow discharge area during a gas discharge phenomenon.

1 shows the structure of a color PDP in a strip arrangement.

Referring to FIG. 1, the PDP includes three electrodes per unit cell for display, that is, an address electrode 10 for data writing, a scan / hold electrode 11 for sequentially scanning a line, and maintaining a cell discharge, and It consists of a sustain electrode 12 which assists in maintaining the discharge. In addition, each cell is separated into partitions 13 and has a structure in which a penning mixed gas is enclosed therein. Here, the penning mixed gas is an argon (Ar) or xenon (Xe) in a neon (Ne) gas. A small amount of can be added to lower the discharge start voltage than a single gas, and is a gas mainly used in fluorescent lamps for a long time.

In such a PDP, when a voltage is applied between the electrodes, discharge occurs on the surfaces of the dielectric layer 14 and the protective layer (MgO) 15 to generate ultraviolet rays, and the fluorescent material is excited by the ultraviolet rays to apply the substance. The color display becomes possible accordingly. The discharge region is between two parallel transparent electrodes 11 and 12 on the front glass substrate 16.

A PDP TV is a system for converting a video signal received from an antenna, that is, an analog signal into digital, and displaying the converted frame data of the digital video signal on a PDP screen as described above in association with a field synchronization signal. In such a PDP TV, when a broadcast signal is not input to a tuning channel, noise appears on the full screen in the prior art, resulting in a bad visual sense.

Accordingly, the present invention is to solve the above-described problems of the prior art, and provides a screen display method of the PDP TV that can provide a higher quality service by blue-backing the screen when the broadcast signal is not input to the tuning channel Has its purpose.

In order to achieve the above object, the present invention provides a screen display of a PDP TV which converts an analog video signal received from a tuner into digital, and displays the frame data of the converted digital video signal on a PDP screen in association with a field synchronization signal. A method comprising: determining if a video signal is detected on the tuning channel when the PDP TV is tuned to a predetermined channel; If an image signal is detected on the tuning channel, displaying the image signal on the PDP screen; And if the video signal is not detected in the tuning channel, screen processing the PDP screen with a predetermined color.

1 is a structural diagram of a general PDP;

2 is an overall configuration diagram of a PDP TV for performing the screen display method of the present invention.

<Description of the code | symbol about the principal part of drawing>

100: tuner 110: signal processing unit

120: A / D converter 130, 220: memory

140: data processing unit 150: synchronization signal separation unit

160: control signal generating unit 170: holding unit

180: scan and hold section 190: address section

200: PDP 210: synchronization signal detection unit

220: memory 230: switching unit

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

2 shows an overall configuration diagram of a PDP TV for performing the screen display method of the present invention.

In FIG. 2, the PDP TV includes a tuner 100, a signal processor 110, an analog / digital (A / D) converter 120, a memory 130, a data processor 140, and a sync signal separator 150. , Control signal generator 160, holding unit 170, scanning and holding unit 180, addressing unit 190, PDP 200, synchronization signal detecting unit 210, memory 220, switching unit 230 It is composed of

Referring to FIG. 2, the tuner 100 receives a broadcast signal of a predetermined channel and provides it to the sync signal separator 150 and the signal processor 110. The signal processor 110 generates analog R (Red), G (Green), and B (Blue) signals from the broadcast signal of a predetermined channel and provides the same to the A / D converter 120 and the A / D converter 120. ) Converts it to digital and provides it to the memory 130, and the memory 130 stores the digital R, G, and B signals input from the A / D converter 120.

The data processor 140 converts the interlaced scanning digital R, G, and B signals stored in the memory 130 into sequential scanning digital signals, and collects image signals having the same weights to form one subfield. Reconfigured to provide to the switching unit 230.

The sync signal separator 150 separates the horizontal and vertical sync signals from the broadcast signal output from the tuner 100 and provides them to the control signal generator 160, and the control signal generator 160 is a sync signal separator. The timing signal for scanning the horizontal line, the timing pulse for holding, and the timing pulse for addressing are generated using the synchronization signal provided from 150, respectively. At this time, the control signal generator 160 alternately provides a timing pulse for maintenance to the holding unit 170 and the scan and holding unit 180. In addition, when the synchronization signal is not input from the synchronization signal separation unit 150, the control signal generator 160 may include a timing pulse for scanning a horizontal line using an internal oscillator, a timing pulse for sustaining, and a timing pulse for addressing. Occurs each.

The holding unit 170 applies a high voltage, for example, 180 V to 340 V, to the sustain electrode of the PDP 200 based on the timing pulse provided from the control signal generator 160, and the scan and hold unit 180. The high voltage is applied to the scan and sustain electrodes of the PDP 200 based on the timing pulse for scanning the horizontal line provided from the control signal generator 160. In addition, the scan and sustain unit 180 applies a high voltage to the scan and sustain electrodes based on the timing pulse for the sustain provided from the control signal generator 160.

The sync signal detector 210 searches the output of the sync signal separator 150 to determine whether a sync signal is detected, and generates a control signal corresponding to the determination result to generate the control signal generator 160 and the switching unit ( 230 each. The memory 220 stores blueback screen data for processing a blueback screen, and is configured as a read only memory (ROM). The switching unit 230 functions to selectively provide the output of the memory 220 or the output of the data processing unit 140 to the address unit 190, and is controlled by the control signal provided by the synchronization signal detecting unit 210. Is switched.

The address unit 190 addresses the unit cells selected in the horizontal line according to the image data provided from the switching unit 230 based on the timing pulse for addressing provided from the control signal generator 160.

The present invention is a screen display method for blue-backing a screen when a broadcast signal is not input to a tuning channel using the PDP TV configured as described above.

First, when a predetermined channel is selected, the tuner 100 detects a broadcast signal of the corresponding channel and provides the same to the sync signal separator 150 and the signal processor 110. Here, when a broadcast signal is loaded on the detected channel, the broadcast signal will be composed of a composite video signal. Accordingly, the signal processor 110 separates the analog R, G, and B signals and the audio signal from the composite video signal, and then provides the analog R, G, and B signals to the A / D converter 120, and the audio signal. Is provided to an audio signal processor (not shown).

The A / D converter 120 converts analog R, G, and B signals to digital, and provides them to the memory 130. Although not shown in the drawing, the memory 130 includes a memory for storing a digital R signal, a memory for storing a digital G signal, and a memory for storing a digital B signal, and the digital R, G, and B signals are inputted. When the corresponding R, G and B signals are stored in the corresponding R, G and B memories, the digital R, G and B signals stored in the memory 130 are interlaced R, G and B signals. Accordingly, the data processor 140 converts the interlaced scanning digital R, G, and B signals into sequential scanning digital signals, collects image signals having the same weight, and reconstructs them into one subfield to switch. To the unit 230.

Meanwhile, the sync signal separator 150 separates the horizontal and vertical sync signals from the broadcast signal output from the tuner 100 and provides them to the control signal generator 160 and the sync signal detector 210, respectively. In this case, if the tuning channel includes a broadcast signal, the sync signal is separated by the sync signal separating unit 150, but if the broadcast channel is not included in the tuning channel, the sync signal will not be detected.

Accordingly, the sync signal detector 210 determines whether the sync signal is input from the sync signal separator 150, and when the sync signal is input, the switching unit connects the data processor 140 and the address unit 190. If the control signal 230 is not input and the synchronization signal is not input, the switching unit 230 is controlled to connect the memory 220 and the address unit 190.

Meanwhile, when the horizontal and vertical synchronization signals are input from the synchronization signal separator 150, the control signal generator 160 may include a timing pulse for scanning a horizontal line, a timing pulse for sustaining, and an address based on the input synchronization signal. Although the timing pulses for generating the horizontal and vertical synchronization signals from the synchronization signal separator 150 are not input, the timing pulses for maintaining the horizontal lines, the timing pulses for the maintenance, and the addressing are performed using an internal oscillator. Generate timing pulses for each.

Therefore, the holding unit 170 provides a high voltage to the holding electrode of the PDP 200 based on the timing pulse provided from the control signal generating unit 160, and the scan and holding unit 180 controls the control signal generating unit ( The high voltage is applied to the scan and sustain electrodes of the PDP 200 based on the timing pulse provided from 160.

Meanwhile, the switching unit 230 selectively provides an output of the memory 220 or an output of the data processing unit 140 to the address unit 190 based on the control signal of the synchronization signal detection unit 210.

The address unit 190 addresses the unit cells selected in the horizontal line according to the image data or the blue back image data provided from the switching unit 230 based on the timing pulse for the address provided from the control signal generator 160. .

As described above, when the broadcast signal is not input to the tuning channel, the present invention has an effect of providing a higher quality service to the viewer by blue-backing the screen. In addition, the screen setting is not limited to the blueback, but can be implemented in various ways according to a user's selection.

Claims (3)

A screen display method of a PDP TV which converts an analog video signal received from a tuner into digital, and displays the frame data of the converted digital video signal on a PDP screen in association with a field synchronization signal. Determining whether an image signal is detected in the tuning channel when the PDP TV is tuned to a predetermined channel; If an image signal is detected on the tuning channel, displaying the image signal on the PDP screen; And if the video signal is not detected in the tuning channel, processing the PDP screen with a predetermined color. The method of claim 1, wherein the determining of whether a video signal is detected in the tuning channel comprises: And a screen display method for discriminating according to whether a synchronization signal is detected in said tuning channel. The method of claim 1, wherein the preset color screen is a blue back screen.