KR20000046844A - Power control apparatus for pdp television system - Google Patents

Abstract

PURPOSE: A power control apparatus for a PDP television system is provided to set the power on timing differently using mute signals for controlling signal at a PDP signal processor and a PDP signal controller. CONSTITUTION: A power control apparatus for a PDP television system includes a set top box(210), microcomputers(214,222), a signal processor(212), a power supply(224) and a PDP module(225). The set top box(210) generates brightness signal and color signal. The microcomputers(214,222) make the output of a PDP signal processor and a PDP signal controller mute or activates slowly based on the time interval between power off and power on. The signal processor(212) make the color signal mute while the mute signal from the micro computer exists. The power supply(224) supplies driving power when a power on signal from the micro computer is input The PDP module(225) display color signal generated from the signal processor.

Description

PD-TV system power control

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for efficiently controlling a power control signal when power is turned on in a plasma display panel (PDP) TV system. This invention relates to a power supply control device of a system for controlling PD power control according to a standby time in order to effectively prevent the power supply.

1 is a power control block diagram of a PD-TV system according to the prior art. As shown in FIG. 1, a set-top box which receives a TV signal through an antenna ANT and generates a luminance signal Y and a color signal C is shown in FIG. 110; It is configured as a PD device 120 for processing the luminance / color signal (Y / C) supplied from the set-top box 110 to display on the internal PD module.

A tuner 111 for detecting a video signal of a required channel from a high frequency TV signal received through an antenna ANT; A signal processor 112 for processing an image signal of an intermediate frequency output from the tuner 111 and outputting a luminance / color signal (Y / C); An interface unit 113 for communicating a serial clock signal and data (SCL / SDA) with the PD device 120; Each part in the set-top box 110 is collectively controlled, and the microcomputer 114 has an on-screen function.

In addition, the PD device 120 includes a light receiving unit 121 for receiving and processing a remote control signal selectively output by a user; A microcomputer 122 for communicating the serial clock signal and data (SCL / SDA) with the interface unit 113 in the set-top box 110 and controlling the driving of the power supply unit 124 and the peripheral circuit in the PD device 120; ; A signal processor 123 for processing the luminance / color signals Y / C supplied from the signal processor 112 and outputting red, green, and blue signals R, G, and B; In addition to supplying the power required for each part in the PD device 120, when the power-on signal V_ON is input from the microcomputer 122, the power Va and Vs are supplied to the PD module 125. A power supply unit 124; It is composed of an address voltage generator 125A, a sustain voltage generator 125B, 125C, and a PD panel 125D, and is driven by power supplies Va and Vs output from the power supply unit 124. A PD module 125 displaying color signals R, G, and B output from the signal processor 123 is configured.

Referring to the operation of the power control device of the conventional PD-TIVE configured as described above is as follows.

With the high frequency TV signal received through the antenna ANT being supplied to the tuner 111 in the set-top box 110, the tuner 111 is a corresponding channel according to the tuning data supplied from the microcomputer 114. After tuning to, process TV signal of the channel and output video signal of intermediate frequency.

The signal processor 112 generates a luminance / color signal (Y / C) from an image signal of an intermediate frequency output from the tuner 111, and under the control of the microcomputer 114, the luminance / color signal (Y / C). ) Is transmitted to the signal processor 123 in the PD device 120.

On the other hand, when the user outputs a power-on signal using the remote control, the microcomputer 122 in the PD device 120 receives the signal through the light receiving unit 121 and then relays the signal to the power supply unit 124 (RY_ON) Outputs and confirms that the monitor voltage 5V_MO is input to "high" from the power supply unit 124, and then activates the power-on signal V_ON for turning on the power supplies Va and Vs. .

Accordingly, the power supply unit 124 outputs power Va to the address voltage generation unit 125A of the PD module 125 and outputs power Vs to the sustain voltage generation units 125B and 125C. The PD panel 125D is driven by them.

On the other hand, the signal processor 123 exchanges serial clock signals / data (SCL / SDA) with the microcomputer 122, and the luminance / color signal (Y /) supplied from the signal processor 112 of the set-top box 110. Color signals R, G, and B are generated from C) and output to the PD module 125.

Therefore, the color signals R, G, and B output from the signal processor 123 are displayed on the PD panel 125D.

However, in the power control device of such a conventional PD-TIVE system, since the monitor voltage is activated in the power supply unit of the PD device, the microcomputer outputs a power-on signal to the power supply unit. There was a defect that the power of the PD device was turned on immediately, causing a transient on the screen.

Accordingly, a technical problem to be achieved by the present invention is to use a mute signal for controlling a signal of a PD signal processing unit and a mute signal for controlling a signal of a PD panel control unit of a PD module. PD-Tive, which sets the on timing differently, provides a power supply control system.

1 is a power supply control block diagram of a PD-TV system according to the prior art.

2 is an exemplary block diagram of a power supply control apparatus of a PD-TV system according to the present invention.

Figure 3 is a detailed block diagram showing an embodiment of the power supply unit in FIG.

4 (a)-(e) are control timing diagrams at power-on after t ₀ elapses after power-off.

5 (a) to 5 (e) are control timing diagrams at power on after 3 seconds have elapsed after power off.

6 (a)-(e) are control timing diagrams at power-on within t ₀ after power-off.

7A to 7F are control timing diagrams when power is turned on within about 3 seconds after power off.

8 is a flowchart of a power supply control signal according to the present invention;

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

210: set-top box 211: tuner

212,223: signal processing unit 213: interface unit

214,222: microcomputer 220: PD device

221: light receiving unit 224: power supply unit

225: PD Module

FIG. 2 is a block diagram of an exemplary embodiment of a power supply control system of a PD-TV system for achieving an object of the present invention. As shown in FIG. 2, a luminance signal (Y) and a color signal are received by receiving a TV signal through an antenna (ANT). Set-top box 210 for generating (C); It was configured as a PD device 220 for processing the luminance / color signal (Y / C) supplied from the set-top box 210 to display on the internal PD module.

The set top box 210 includes a tuner 211 which detects a video signal of a required channel from a TV signal of a high frequency received through an antenna ANT; A signal processor 212 for processing an image signal of an intermediate frequency output from the tuner 211 and outputting a luminance / color signal (Y / C); An interface unit 213 for communicating a serial clock signal and data (SCL / SDA) with the PD device 220; Each part in the set-top box 210 is collectively controlled and constituted by a microcomputer 214 having an on-screen function.

In addition, the PD device 220 includes: a light receiving unit 221 for receiving and processing a remote control signal selectively output by a user; In communication with the interface unit 213 in the set-top box 210 and the serial clock signal and data (SCL / SDA) and controlling the driving of each system, the power-on signal is supplied when the time after the power-off is relatively short. A microcomputer 222 which activates early, but mutes the output signals of the signal processing unit and the PD panel using a mute signal, and activates the power-on signal late if possible. The luminance / color signal Y / C supplied from the signal processor 212 is processed to output red, green, and blue signals R, G, and B, and a mute signal SIG_MU from the microcomputer 222. A signal processor 223 for muting the color signals R, G, and B while is inputted; In addition to supplying the power required by the respective parts of the PD device 220, when the power-on signal V_ON is input from the microcomputer 222, the power Va and Vs are supplied to the PD module 225. A power supply unit 224; The PD module 225 is driven by the power supplies Va and Vs output from the power supply unit 224 to display the color signals R, G, and B output from the signal processing unit 223.

The PD module 225 transmits the color signals R, G, and B output from the signal processor 223 to the PD panel 225E, and the screen mute signal SCR_MU is input from the microcomputer 222. PD panel control unit 225A for muting the output signal during the operation; An address voltage generator 225B, a sustain voltage generator 225C, and 225D that are supplied with the power supplies Va and Vs from the power supply unit 224 to drive the PD panel 225E.

When described in detail with reference to Figures 3 to 8 attached to the operation of the present invention configured as described above are as follows.

In the set-top box 210, the tuner 211 receives a high-frequency TV signal received through the antenna ANT to generate a video signal of an intermediate frequency from the TV signal of the requested channel, and the signal processor 212 A luminance / color signal (Y / C) is generated from an image signal of an intermediate frequency and transmitted to the signal processor 223 in the PD device 220 under the control of the microcomputer 214.

In the PD device 220, when the power-on signal of the remote controller is input through the light receiving unit 221 and transmitted to the microcomputer 222, the microcomputer 222 passes from the immediately previous power-off time to the current time of power-on. The time t is calculated, and the time t is compared with a predetermined time t ₀ , and the power and output signals are controlled as described below according to the comparison result.

First, an operation process of the power supply unit 224 under the control of the microcomputer 222 will be described in detail with reference to FIG. 3.

When the code PWR for turning on the 220V power is transmitted to the standby power supply unit 302 through the line filter 301, the standby power supply unit 302 is driven to output the power-on signal AC_ON as "high." The microcomputer 222 receives the power-on signal AC_ON and outputs the relay-on signal RY_ON to the rectifier circuit 303 as "high."

Accordingly, the voltage rectified through the rectifier circuit 303 and the PFC 304 is supplied to the first power supply unit 305 and the second power supply unit 306. As a result, the first power supply unit 305 generates power Vs and outputs the power Vs to the power control unit 307, and the second power supply unit 306 generates power Va to generate the power supply Va and the direct current / direct current. It outputs to the conversion part 308 side.

The DC / DC converter 308 supplies the 5V power required by the PD panel 225E, and when the 5V power is normally output, the high voltage of the monitor voltage 5V_MO is applied to the microcomputer 222. Will output At this time, the microcomputer 222 confirms that the monitor voltage 5V_MO is input as "high" and outputs the power-on signal V_ON as "high".

The power controller 307 receives the powers Vs and Va supplied from the first and second power units 305 and 306, and the power-on signal V_ON is "high" from the microcomputer 222. When input to the power supply (Vs), (Va) is output to the PD module 225.

On the other hand, the microcomputer 222 activates the power-on signal (V_ON) to prevent the transient phenomenon appearing on the screen, by using the screen mute signal (SCR_MU) PD panel control unit 225A from the PD panel 225E The signal supplied to the controller is controlled, and the signal supplied from the signal processor 223 to the PDP controller 225A is controlled using the mute signal SIG_MU. The address voltage generator 225B, the sustain voltage generators 225C, and 225D use the power supplies Va and Vs output from the power control unit 307 of the power supply unit 224 to provide the PDP panel 225E. To drive.

A detailed description will be given below with reference to FIGS. 4 to 7 to which a control process for preventing transient and voltage instability of a screen when power is turned on in the PD device 220 is described.

First, when the power-on signal PWR_ON of the remote controller is input through the light receiving unit 221 after the predetermined time t ₀ elapses from the time when the power is turned off, the microcomputer 222. ) Outputs the relay on signal RY_ON to the power supply unit 224 as "high" as shown in FIG. 4 (b) to turn on the power supply relay.

As shown in (c) of FIG. 4, the microcomputer 222 has a high monitor voltage 5V_MO from the power supply unit 224 within t ₂ hours after t ₁ hour has elapsed from the time when the power-on signal PWR_ON is input. "To be supplied.

As a result of the above check, if the monitor voltage 5V_MO is supplied "high" within t ₂ hours, the power-on signal V_ON is output "high" after t ₃ hours as shown in FIG. Turn on all power to 220).

As shown in (e) of FIG. 4, the screen mute signal SCR_MU is released after t ₄ hours from the time when the power-on signal PWR_ON is input, so that the output signal of the PDP panel controller 225A becomes the PDP panel ( 225E).

Meanwhile, the control process of FIG. 4 will be described with reference to the practical application example of FIG. 5.

When the relay is turned on as shown in (c) of FIG. 5 and the monitor voltage (5V_MO) is input after 500m to 1sec has elapsed, and the monitor voltage (5V_MO) is input as "high" within 3 seconds from the relay on time, 4.5 seconds after 500 m to 1 sec has elapsed, the power-on signal V_ON is output as "high". Also, the screen mute signal SCR_MU is released 5.5 to 6 seconds after the relay on time.

As a result, in the related art, as soon as the monitor voltage 5V_MO is input as "high", a transient phenomenon appears on the screen by outputting the power-on signal V_ON to "high" for turning on the power supply Va and Vs. I,

In the present invention, as described above, the power-on signal V_ON is output as "high" after 4.5 sec. And the screen mute signal SCR_MU is released after 5.5 sec to 6 sec from the relay on time, so that no transient phenomenon occurs. .

On the other hand, unlike FIG. 4 and FIG. 5, it is possible to control the release timing of the mute signals SCR_MU and SIG_MU in order to activate the power-on signal V_ON as soon as possible, and to prevent screen transients caused by this. Another embodiment will be described with reference to FIG. 6.

As shown in FIGS. 6A to 6C, after a predetermined time t ₀ has elapsed from the time when the power is turned off, the power-on signal PWR_ON of the remote controller is input through the light receiving unit 221 to relay the ON signal. (RY_ON) is output as "high", and when t ₁ hour has elapsed therefrom, it is checked whether the monitor voltage 5V_MO is input as "high" within t ₂ hours.

If the monitor voltage (5V_MO) is input as "high" within t ₂ hours as a result of the above check, wait again for the time t ₃ for the t ₂ hours as shown in (c) and (d) of FIG. Stabilizes the power by outputting the power-on signal V_ON as "high".

Thereafter, in order to prevent the screen transient caused by quickly activating the power-on signal (V_ON), as shown in (d) and (e) of FIG. 6, the mute signal SIG_MU is released after t ₄ hours. The color signals R, G, and B output from the processing unit 223 can be supplied to the PD panel controller 225A, and after ₅ hours, the screen mute signal SCR_MU is released to release the screen mute signal SCR_MU. The output signal can be supplied to the PDP panel 225E.

Meanwhile, the control process of FIG. 6 will be described with reference to the practical application example of FIG. 7.

If 500m to 1sec has elapsed since the remote controller's power-on signal (PWR_ON) and relay-on signal (RY_ON) started being output "high", check that the monitor voltage (5V_MO) is input as "high" within 1.5 sec. .

As a result of the check, when the monitor voltage 5V_MO is input to "high" within 1.5 sec, the power-on signal V_ON is output to "high" within 1.5 sec from this. In addition, in order to prevent a transient phenomenon of the screen caused by outputting the power-on signal V_ON as "high", when the monitor voltage 5V_MO is input as "high", a mute signal ( SIG_MU is released and the screen mute signal SCR_MU is released 3.5 to 4.5 sec after the start of outputting the relay on signal RY_ON "high".

Meanwhile, referring to the signal flow chart of FIG. 8, a control process for stabilizing a system at power-on is as follows.

When the microcomputer 222 receives the power-on signal PWR_ON of the remote controller through the light receiving unit 221, whether the predetermined time t ₀ (eg, t ₀ : 3 seconds) has elapsed since the power is turned off. If it is confirmed that the elapsed time, the control function is performed at the timing as shown in Fig. 4 (S1-S4).

The relay-on signal RY_ON is output as "high", and when t ₁ (500m to 1sec) time elapses, it is checked whether the monitor voltage (5V_MO) is input as "high". (S5-S7)

If the monitor voltage 5V_MO is not input as "high", check whether t ₂ hours have elapsed. If not, return to the input checking step S6 of the monitor voltage 5V_MO. If so, the DC / DC conversion Judging from the abnormality of the unit 308, the relay on signal RY_ON is switched to "low" to turn off the power, and then ends. (S8, S9)

However, if the monitor voltage (5V_MO) is input as "high" as a result of the above check, if it is determined that the t ₂ and t ₃ time is the same (see Fig. 6), the power-on signal after t ₃ (1.5sec) Outputs (V_ON) as "high" to turn on the power, release the mute signal (SIG_MU) after t ₄ (2sec), and prevent the screen muting signal after t ₅ (3.5sec ~ 4.5sec) SCR_MU) is released. (S10-S13)

However, if t ₃ is determined to be longer than t ₂ (see FIG. 4), the power-on signal V_ON is activated "high" after t ₃ (4.5 sec) to turn on the power. After t ₄ (5.5 sec to ₆ sec), the screen mute signal SCR_MU is canceled. (S14, S15)

As a result, as described above, the control signal timing is set differently according to the time after the power is turned off, thereby improving the reliability of the system.

That is, if the time for power-on after the power-off is short, the power-on signal V_ON is activated "high" quickly, and the mute signal SIG_MU is used to prevent the transient phenomenon caused by the signal processing unit 223. The output signal is muted and the output signal of the PD panel control unit 223 is muted by using the screen mute signal SCR_MU.

In addition, if the time after the power-off is long, the power-on signal (V_ON) is activated as late as possible "high" to prevent the transient phenomenon.

As described in detail above, the present invention activates the power-on signal as soon as possible when the power-on time is short after the power-off, and mutes the output signal of the signal processor by using the mute signal to prevent the transient phenomenon caused by the power-on signal. By using the screen mute signal, the output signal of the PD panel control unit 223 is muted. If the time after the power-off is long, the power-on signal can be activated as late as possible to prevent the transient phenomenon and operate the system more stably. It has an effect.

Claims (3)

A set top box for receiving a high frequency TV signal and generating a luminance signal and a color signal; In communication with the set top box and the serial clock signal and data, and controlling the driving of each part in the PD device, when the time after the power-off is relatively short, the power-on signal is quickly activated, and the signal processing unit is used by using the mute signal. A microcomputer which mutes the output signal of the PD panel control unit and activates the power-on signal as late as possible if it is long; A signal processor for processing luminance / color signals supplied from the set-top box to output red, green, and blue signals, and muting the color signals while a mute signal is input from the microcomputer; A power supply unit for supplying power required by each unit in the PD device and supplying driving power to the PD module when a power-on signal is input from the microcomputer; And a PD module that is driven by a driving power output from the power supply unit and displays a color signal output from the signal processing unit. The apparatus of claim 1, further comprising: a standby power supply for activating a power-on signal (AC_ON) and outputting it to the microcomputer when a power-on code is input; A rectifier circuit and a FPC for outputting a rectified voltage of a predetermined level when a relay on signal RY_ON is input from the microcomputer; A first power supply unit and a second power supply unit receiving the rectified voltage to generate powers Va and Vs; A power control unit for transmitting the powers Va and Vs to a PD panel when an active power-on signal V_ON is input from the microcomputer; When the power supply (Va) is supplied to supply the power required by the PD panel, and while the power supply is normally output, DC / DC conversion unit for activating the monitor voltage (5V_MO) and outputs to the microcomputer side, characterized in that the configuration PD-TV system power control. The PD module of claim 1, further comprising a PD panel control unit configured to transfer the color signal output from the signal processing unit to the PD panel, and to mute the output signal while the screen mute signal is input from the microcomputer. PD-TV system power control.