KR100672563B1 - Apparatus for controling power of PDP TV - Google Patents

Abstract

The present invention relates to PDTV's power control device that operates each power related configuration at a precise timing according to a preset order to prevent deterioration of device reliability. A constant voltage generator for receiving a power supply and generating a predetermined constant voltage, a plurality of power supply units for converting the constant voltage generated from the constant voltage generator into an operating voltage for driving each part of the PD module, and a predetermined sequence according to the power control signal of the microcomputer Since the furnace switching unit and a plurality of power supply units are configured to include a power control microcomputer that outputs a power on / off signal at a corresponding timing such that the power supply unit is turned on or off, the reliability of the device can be improved.

TV / Power

Description

PDTV TV's power control device {Apparatus for controling power of PDP TV}

1 is a block diagram showing a power supply control apparatus of PDTV according to the prior art

FIG. 2 is a diagram illustrating power output timing of each unit according to FIG. 1. FIG.

Figure 3 is a block diagram showing a power control device of PDTV according to the present invention

4 is a diagram illustrating the power output timing of each part according to FIG.

Explanation of symbols for main parts of the drawings

31: standby power unit 32: relay

33: relay control unit 34: constant voltage generating unit

35: 5 V power supply 36: Vs power supply

37: Va power supply 38: Micom

39: power control microcomputer 40: Vs control unit

41: Va control unit

The present invention relates to a TV, and more particularly, to a power supply control apparatus of PDTV.                         

A TV is a video device that tunes and demodulates a broadcast signal according to a channel selected by a user from among broadcast signals transmitted from a broadcasting station, divides it into voice and video, and outputs it through a screen and a speaker through corresponding voice and image processing. In addition to the most widely used CRT, there is also a TV using LCD, PDP, etc. to satisfy the high quality / large screen characteristics.

Particularly, in the case of PD TV, it is possible to manufacture considerably thinner than the existing CRT in terms of its structural characteristics and to satisfy the technical requirements of TV as it has excellent luminance characteristics compared to LCD, and it has been spotlighted as the next generation TV due to its excellent layout characteristics such as wall installation. have.

However, due to the characteristics of PDP, high voltage is required during operation, so control of power-related configuration is one of the technical requirements for commercialization of PDTV.

At this time, looking at the schematic structure of the PDP, the upper plate and the lower plate is configured to be bonded to each other, the upper plate includes a scan electrode and a sustain electrode formed in parallel with each other, and a dielectric layer and a protective film formed on the upper plate including the scan electrode and the sustain electrode. The lower plate includes an address electrode, a dielectric film formed on the front surface of the substrate including the address electrode, a partition formed on the dielectric film between the address electrodes, and a phosphor formed on the partition wall and the dielectric film surface in each discharge cell. In addition, the space between the upper plate and the lower plate is filled with discharge gas mixed with inert gas such as helium (He), xenon (Xe), and the like to form a discharge region.

The PD is discharged as a predetermined voltage is applied to the electrodes, and phosphors are excited by ultraviolet rays generated at this time, thereby realizing color. Therefore, a module driving unit for controlling the drive of the PD module so that a predetermined voltage is applied to the electrode according to a predetermined timing.

As shown in FIG. 1, the power control apparatus of PDTV according to the related art receives a commercial AC power input to generate a constant voltage (eg, 380V) and generates a predetermined voltage (eg, 380V). The 5V power supply unit 15 converts the constant voltage generated by the generator 14 to supply 5V operating power to the module driver, and the constant voltage generated by the constant voltage generator 14 is transformed to drive the sustain electrode of the PDP panel. Supplying the sustain voltage (Vs) A Va power supply unit 17 and a constant voltage generator 14 that convert an constant voltage generated by the power supply unit 16 and the constant voltage generator 14 to supply an address voltage Va for driving an address electrode of a PD panel. The relay 12 for controlling the power supply to the furnace, the relay controller 13 for controlling the operation of the relay 12, the standby mode, that is, the user's response to the operation command input through the remote control while the image is not displayed. Standby power supply unit 11 for supplying power to the essential components, the operating power is supplied through the standby power supply unit 11 and the 5V power supply unit 15 and the Vs power supply unit 16 in accordance with a predetermined control algorithm And a microcomputer 18 for controlling the Va power supply unit 17.

Referring to the power control operation of the prior art configured as described above is as follows.

First, when the user 'turns on' the power using the remote controller, the microcomputer 18 recognizes the power 'on' command received through the infrared signal receiving means (not shown) and performs the procedure in a predetermined control algorithm. Operate each component accordingly. At this time, the operation of each component in a predetermined order is to prevent the occurrence of reliability degradation such as overload is applied to each component causing damage.

For this reason, the microcomputer 18 is in the order of the relay 12 'on' → 5V power supply 15 'on' → Va power supply 17 'on' → Vs power supply 16 'on'. Output control signal to each part to be 'on'. That is, when the user presses the power key, the control signal is output to the relay controller 13, and then the control signal is simultaneously output to the Vs power supply 16 and the Va power supply 17.

At this time, the 5V power supply unit 15 is designed to be 'on' before the Va power supply unit 17 is 'on' by receiving a constant voltage from the constant voltage generator 14 as the relay 12 is 'on'. The power supply unit 17 is designed to be 'on' first even if the 'on' signal is applied simultaneously with the Vs power supply unit 16.

Therefore, the module driving unit of the PDP received the operating power through the 5V power supply unit 15 supplies the power supplied from the Vs power supply unit 16 and the Va power supply unit 17 to the corresponding electrode so as to meet a predetermined timing. The PDP is driven and an image of the channel selected by the user is implemented accordingly.

However, even though the Va power supply 17 is designed to be 'on' first compared to the Vs power supply 16, in practice, the Vs power supply 16 and the Va power supply as shown in FIG. Supply section 17 is 'on' at the same time.                         

That is, although the Vs power supply 16 and Va power supply 17 are each designed to be 'on' with a predetermined time difference, the actual voltage characteristic does not immediately rise to the corresponding voltage level but rises with a predetermined slope. Therefore, although the actual operation point has a predetermined time difference, the point of time when the voltage level reaches the corresponding voltage level and the 'on' operation is almost no difference, and even if there is a difference, it is not enough to secure the reliability of the device.

On the other hand, when the power 'off', except that the relay 12 first 'off', the rest is 'off' in the reverse order.

The power control device of PDTV according to the prior art turns on detailed power-related components differently from the preset order when the power is 'on', thereby reducing the reliability of the device due to unnecessary electrical interference between each power-related components and PD module. There is a problem.

Accordingly, the present invention has been made to solve the above-mentioned problems, and provides a power supply control device of PDTV to operate each power supply-related configuration at a precise timing in accordance with a predetermined order to prevent degradation of the reliability of the device. Has its purpose.

The present invention provides a switching unit for inputting or blocking commercial AC power, a constant voltage generator for receiving a predetermined AC voltage and generating a predetermined constant voltage, and a constant voltage generated from the constant voltage generator as an operating voltage for driving each part of the PD module. And a plurality of power supply units for transforming power, and a power control microcomputer for outputting a power on / off signal at a corresponding timing such that the switching unit and the plurality of power supplies are turned on or off in a predetermined order according to the power control signal of the microcomputer. It is characterized by.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the power control device of PDTV according to the present invention in detail.

3 is a block diagram showing a power supply control apparatus of PDTV according to the present invention, Figure 4 is a view showing the power output timing of each part according to FIG.

As shown in FIG. 3, the power control apparatus of PDTV according to the present invention receives a microcomputer 38 that outputs a total system control and a power control signal, and receives a commercial AC power input thereto. A constant voltage generator 34 generating a 380V, a 5V power supply 35 supplying a 5V operating power to the module driver by converting the constant voltage generated by the constant voltage generator 34, and the constant voltage generator 34 Vs for supplying sustain voltage (Vs) for driving sustain electrode of PD panel by transforming constant voltage A Va power supply unit 37 and a constant voltage generator 34 which supply an address voltage Va for driving an address electrode of a PD panel by transforming a constant voltage generated by the power supply unit 36 and the constant voltage generator 34. The relay 32 for controlling the power supply to the furnace, the relay controller 33 for controlling the operation of the relay 32, the standby mode, that is, corresponding to the operation command input by the user through the remote control while the image is not displayed. Standby power supply unit 31 for supplying power to the necessary components, when the power 'on' signal is input from the microcomputer 38, relay 32-5V power supply 35-Va power supply 37- The power control microcomputer 39 outputs a control signal to be 'on' in the order of the Vs power supply unit 36, and the 5V power supply unit 35 is 'on' according to the control signal output from the power control microcomputer 39. Next Va power supply 37 is 'on' The Va control unit 41 controls the Va power supply unit 37 to be turned on according to the control signal output from the power control microcomputer 39, and then the Vs power supply unit 37 is turned on with a predetermined time difference. It is configured to include a Vs control unit 40 to control to.

At this time, the Vs control unit 40 and the Va control unit 41 are configured to include a delay element and a switching element having a different delay time, the delay element of the Vs control unit 40 is delayed compared to the delay element of the Va control unit 41 Long time

The power control operation of PDTV according to the present invention configured as described above is as follows.

First, when the user 'turns on' the power using the remote controller, the microcomputer 18 recognizes the power 'on' command received through the infrared signal receiving means (not shown) and controls the power 'on' signal with the power. Output to the microcomputer 39.

Subsequently, the power supply control microcomputer 39 controls the relay control unit 33 to turn on the relay 32. Therefore, the commercial AC power is supplied to the constant voltage generator 34.

The constant voltage generator 34 converts the supplied commercial AC power into a constant voltage of about 380 V and supplies the same to the 5 V power supply 35, the Vs power supply 36, and the Va power supply 37.

Subsequently, the 5V power supply unit 35 transforms the constant voltage of 380V generated by the constant voltage generator 34 to supply 5V operating power of a control circuit for controlling the PD module.

On the other hand, the power control microcomputer 39 'turns on' the relay 32 through the relay controller 33 and then outputs an 'on' signal to the Va controller 41. Accordingly, the Va control unit 41 turns on the Va power supply unit 37. Accordingly, the Va power supply unit 37 transforms the constant voltage of 380V generated by the constant voltage generator 34 to supply the address electrode driving voltage of the PD.

The power control microcomputer 39 outputs an 'on' signal to the Va controller 41 and then outputs an 'on' signal to the Vs controller 40 with a predetermined time difference. Accordingly, the Vs controller 40 is 'on' with a time delay that is sufficiently delayed compared to the Va controller 41 by the operation of the internal switching element and the delay element, thereby regulating the constant voltage of 380 V generated by the constant voltage generator 34. The voltage is transformed to supply the sustain electrode driving voltage of the PD.

In other words, unlike the conventional method, the power control microcomputer 39 outputs an 'on' signal to the Va controller 41 and the Vs controller 40 with a predetermined time difference, thereby causing a primary delay, and causing the Va controller 41 and The V control unit 40 and the V control unit 40 have a sufficient time difference to ensure the reliability of the device by causing a secondary delay due to the hardware configuration of each of the Vs control unit 40, that is, the delay element. ) Works.

Accordingly, the power supply from the Vs power supply unit 36 and the Va power supply unit 37 is supplied to the corresponding electrode so that the module driving unit of the PDP received the operating power through the 5V power supply unit 35 meets a preset timing. The PDP is driven and thus the image of the channel selected by the user is implemented through the PD module.

The power control device of PDTV according to the present invention is equipped with a separate power control microcomputer and control means for controlling each power-related configuration to operate the power-related configuration in a predetermined order with sufficient time difference to improve the reliability of the device It can be effected.

Claims (7)

PD module; A switching unit for inputting or blocking commercial AC power; A constant voltage generator configured to receive the commercial AC power and generate a predetermined constant voltage; A first power supply unit converting the constant voltage generated by the constant voltage generator into an operating power source of a control circuit for controlling the PD module driving; A second power supply unit for converting the constant voltage generated by the constant voltage generator into a driving power source for driving the address electrode of the PD module; A third power supply unit converting the constant voltage generated by the constant voltage generator into a driving power source for driving the sustain electrode of the PD module; And a power control microcomputer for outputting a power on / off signal at a corresponding timing such that the switching unit and the plurality of power supplies are turned on or off in a predetermined order. The method of claim 1, And a delay element and a switching element each having a different delay time, and further comprising a plurality of power supply controllers for turning on / off a corresponding power supply with a predetermined time difference according to a power on / off signal of the power control microcomputer. PD PTV power control device comprising a. The method of claim 2, The plurality of power supply control unit, A first power supply control unit controlling a power supply of the second power supply unit; And And a second power supply control unit for controlling the power supply of the third power supply unit. The method of claim 2, The predetermined order is The power control device of PDTV, characterized in that the first power supply, the second power supply and the third power supply in the order. The method of claim 3, wherein And a delay time of the first power supply controller is shorter than a delay time of the second power supply controller. delete delete

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