KR100418890B1 - PDP module protecting Apparatus for PDP TV - Google Patents

Abstract

The present invention relates to a PD module protection device of PD PD which prevents damage of PD module completely in case of power failure. Power factor correction unit converts PD module and commercial AC power into DC and raises the voltage level by a predetermined level. And a switching unit for supplying or blocking commercial AC power to the power factor correction unit, a plurality of power units supplying sustain, scan, and address driving power to the PD module using the output power of the power factor correction unit, and outputs of each of the plurality of power units. A plurality of PWM controllers and a plurality of PWM controllers for providing a PWM signal for voltage generation and dividing the output of the corresponding power supply part through a voltage divider resistor to compare with the reference voltage and to stop the operation of the corresponding power supply part when the reference voltage is less than the reference voltage. Compares the divided voltage level and the respective reference voltage If the phase is less than the reference voltage includes an abnormal power control unit for outputting a power failure signal, and the microcomputer to control the switching unit according to the output of the control unit to cut off the supply of commercial AC power to the power factor correction unit any one or more of the entire power supply unit In this case, the power output of the entire power supply can be cut off to prevent damage to the PD module and improve the reliability of the product.

Description

PDP module protecting Apparatus for PDP TV

The present invention relates to a TV, and more particularly to a PD module protection device of PD TV.

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, PD is able to manufacture considerably thinner than the existing CRT due to its structural characteristics, and it has excellent brightness characteristics compared to LCD, satisfying the technical requirements as TV, 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 top plate and the bottom plate are bonded to each other, the top plate is a dielectric layer formed on the scan (Y) and sustain (X) electrode formed in parallel with each other and the top plate including the scan electrode and the sustain electrode And a protective film. The lower plate includes an address (Z) 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 the phosphor is excited by ultraviolet rays generated at this time, thereby realizing color.

As shown in FIG. 1, a PD module protection device of PD TV according to the related art includes a PD module 21 for implementing an image and a Vs power supply unit for supplying a sustain voltage to the X electrode of the PD module 21. 17) a Vsetup power supply 18 for supplying a setup voltage to the Y electrode of the PD module using the output of the Vs power supply unit 17 and a scan to the Y electrode of the PD module using the output of the Vs power supply unit 17 Vsc power supply unit 19 for supplying a voltage, Va power supply unit 20 for supplying an address voltage to the Z electrode of the PD module 21, the Vs power supply unit 17 and Va power supply unit 18 and Vsetup power supply unit 19 ) And the Vsc power supply unit 20 and provide a pulse signal having a duty rate according to a predetermined frequency so that the power output of the corresponding power supply is made, and the output of the power supply is fed back through the voltage divider resistor to obtain a reference value. And rain In addition, the PWM control unit 17-1 (18-1) (19-1) (20-1), 220 ~ 260V commercial AC power supply to control the duty ratio of the pulse signal to stop the operation of the power supply unit when an abnormality occurs. Rectifier 11 for rectifying the power supply, standby power supply 12 for supplying power to the essential components so that the user can respond to the operation command input through the remote control in the standby mode, 220 ~ 260V commercial AC power input A power factor correction unit 16 for boosting and generating a 380 to 400V DC voltage, a relay 14 for switching a commercial AC power input to the power factor correction unit 16, and the relay 14 Relay driver 15 for controlling the operation of the power supply, the standby power supply unit 12 receives a power supply of the microcomputer 13 to control the relay driver 15 according to the power on / off command is configured. .

Looking at the operation of the module protection device of the PD TV according to the prior art configured as described above are as follows.

The commercial AC power is rectified through the rectifier 11, supplied to the microcomputer 13 through the standby power supply 12, and simultaneously supplied to the power factor correction unit 16 through the relay 14.

Subsequently, the power factor correction unit 16 boosts the commercial AC power and converts the DC power into DC to supply a DC voltage of 380 to 400V to the Vs power supply unit 17 and the Va power supply unit 20.

Therefore, the Vs power supply unit 17, Va power supply unit 20, Vsetup power supply unit 18, and Vsc power supply unit 19 are respectively PWM control units 17-1, 18-1, 19-1 and 20-1. DC voltage is generated according to the duty ratio of the pulse signal supplied from the supply to the PD module 21.

At this time, since the operation principle of each PWM control unit is the same, for example, the PWM control unit 17-1 for controlling the Vs power supply unit 17 divides the output voltage of the Vs power supply unit 17 through the voltage divider resistor. If it is normal compared to the reference voltage, that is, the reference voltage or more, the pulse signal of the normal duty ratio is outputted so that the Vs power supply unit 17 outputs the normal voltage. If the reference voltage is less than the reference voltage, the operation and damage of the PD module may be caused. As a result, the pulse signal output is interrupted to stop the operation of the Vs power supply unit 17.

As a result, only the driving power output of the power supply unit in which the abnormality occurs is cut off, and the other power supply units continue to supply the driving power to the PD module 21.

Since the power supply unit of the PDP TV according to the prior art stops the operation of only the power configuration in which an abnormality occurs, there is a problem that may damage the PD module by supplying power to the PD module in other power configurations.

Therefore, an object of the present invention is to provide a PD module protection device of PD TV which can completely prevent damage to PD module when a power failure occurs.

1 is a block diagram showing the configuration of a PD module protection device of PD TV according to the prior art

2 is a block diagram showing the configuration of a PD module protection device of PD TV according to the present invention

Explanation of symbols for main parts of the drawings

31: rectifier 32: standby power supply

33: micom 34: relay

35: relay drive unit 36: power factor correction unit

37: Vs power supply part 38: Vsetup power supply part

39: Vsc power supply part 40: Va power supply part

41: PD module 42: abnormal power control unit

37-1, 38-1, 39-1, 40-1: PWM control

The present invention provides a PD module, a power factor correction unit for converting a commercial AC power source into a DC and raising its voltage level by a predetermined level, a switching unit for supplying or blocking a commercial AC power source to the power factor compensation unit, and an output power factor of the power factor compensation unit. It provides a plurality of power supply units for supplying sustain, scan, and address drive power to the PDP module, and PWM signals for generating the output voltage of each of the power supply units. Compare and compare the divided voltage levels of each of the plurality of PWM control units and the respective reference voltages corresponding to the plurality of PWM control units to stop the operation of the corresponding power supply unit if the reference voltage is lower than the reference voltage. An abnormal power supply control unit for outputting an abnormal signal, and the switching unit in accordance with the output of the control unit It characterized in that it comprises a microcomputer to control the supply of commercial AC power to the power factor correction unit.

Hereinafter, a preferred embodiment of a PD module protection apparatus of PD TV according to the present invention with reference to the accompanying drawings in detail.

2 is a block diagram showing the configuration of a PD module protection apparatus of PD TV according to the present invention.

As shown in FIG. 2, the PD module protection apparatus of PDTV according to the present invention includes a PD module 41 for implementing an image and a Vs power supply unit 37 for supplying a sustain voltage to the X electrode of the PD module 41. ), A Vsetup power supply 38 for supplying a setup voltage to the Y electrode of the PD module 41 using the output of the Vs power supply 37, and a PD module 41 using the output of the Vs power supply 17. Vsc power supply unit 39 for supplying a scan voltage to the Y electrode of the V, a Va power supply unit 40 for supplying an address voltage to the Z electrode of the PD module 41, the Vs power supply unit 37 and the Va power supply unit 40 And the Vsetup power supply unit 38 and the Vsc power supply unit 39, respectively, and provide a pulse signal having a duty rate according to a preset frequency so that the power supply of the corresponding power supply is made and the output of the power supply is divided accordingly. Voltage divided by dividing through PWM control unit (37-1) (38-1) (39-1) (39-1) (40-) to compare the reference value for determining the abnormality of the power supply and if it is less than the reference value to adjust the duty ratio of the pulse signal to stop the operation of the corresponding power supply unit. 1), rectifying unit 31 for rectifying commercial AC power of 220 ~ 260V, standby power unit 32 for supplying power to the essential components so that the user can respond to the operation command input through the remote control in the standby mode Power factor correction unit 36 for receiving a commercial AC power of 220 ~ 260V and boosting it up to generate a 380 ~ 400V DC voltage, for switching the commercial AC power input to the power factor correction unit 36 The divided voltage of the relay 34, the relay driver 35 for controlling the driving of the relay 34, and the respective PWM control units 37-1, 38-1, 39-1, 40-1. If the level is read and each of them is below the reference voltage, The relay power driver 42 may receive an abnormal power control unit 42 for outputting a phase signal and the standby power unit 32 may receive power, and according to an external power on / off signal and a power abnormal signal output from the abnormal power controller 42. And a microcomputer 33 for controlling 35).

At this time, looking at the detailed configuration of the abnormal power control unit 42, the divided voltage of the PWM control unit (37-1) 38-1 (39-1) (40-1) is input to each end and the corresponding PWM at the other end The comparator includes four comparators to which the reference voltage is applied and an output of the comparator includes an OR gate applied through the four input terminals.

Looking at the operation of the module protection device of the PD TV according to the present invention configured as described above are as follows.

The commercial AC power is rectified through the rectifier 31, supplied to the microcomputer 33 through the standby power supply 32, and simultaneously supplied to the power factor correction unit 36 through the relay 34.

Subsequently, the power factor correction unit 36 boosts the commercial AC power and converts the DC power into DC to supply a DC voltage of 380 to 400V to the Vs power supply 37 and the Va power supply 40.

Accordingly, the Vs power supply unit 37, the Va power supply unit 40, the Vsetup power supply unit 38, and the Vsc power supply unit 39 generate DC voltages according to the duty ratios of the pulse signals supplied from the respective PWM control units. To feed.

Each PWM control unit, for example, the PWM control unit 37-1 for controlling the Vs power supply unit 37 receives the output voltage of the Vs power supply unit 37 through the voltage dividing resistor and compares with the reference voltage to normal. That is, when the reference voltage level is higher than the normal duty ratio pulse signal is output so that the Vs power supply unit 37 outputs the normal voltage, and if the output voltage of the Vs power supply unit 37 received through the voltage divider resistor is less than the reference voltage, the pulse is output. The signal output is interrupted to stop the operation of the Vs power supply 37. In the case of other PWM control unit, the basic operation principle is the same, so detailed operation description will be omitted.

At the same time, the abnormal power supply controller 42 compares each divided voltage level of each PWM control unit 37-1, 38-1, 39-1, 40-1 with the corresponding reference voltage and is less than the reference voltage. In this case, 'high' is output to the input terminal of the OR gate. Therefore, the OR gate outputs a power supply abnormal signal having a 'high' level to the microcomputer 33 when at least one of the inputs is less than the reference voltage.

Subsequently, the microcomputer 33 controls the relay driver 35 to 'off' the relay 34.

Therefore, since the AC power input to the power factor correction unit 36 is cut off, the power supply from the Vs power supply unit 37, the Va power supply unit 40, the Vsetup power supply unit 38, and the Vsc power supply unit 39 to the PD module 41 is perfect. Is blocked.

The PD module protection device of PDTV according to the present invention has the effect of preventing damage to the PD module by preventing power output of the entire power unit when any one of the entire power units is abnormal, thereby improving the reliability of the product. .

Claims (2)

PD module, A power factor correction unit for converting a commercial AC power into a DC and raising the voltage level by a predetermined level; Switching unit for supplying or blocking commercial AC power to the power factor correction unit, At least two power supply units for supplying a PD module driving power using the output power of the power factor correction unit; At least two PWMs that provide a PWM signal for generating driving power to each power supply unit and divide the driving power generated by each power supply unit through a voltage divider resistor to compare with the reference voltage and to stop the operation of the corresponding power supply unit if the reference voltage is smaller than the reference voltage. Control Panel, An abnormal power control unit for comparing the divided voltage level of each PWM control unit with a corresponding reference voltage and outputting a power error signal when at least one of them is smaller than the reference voltage; The PD module protection device of PDTV including a microcomputer to control the switching unit according to the output of the abnormal power control unit to block the supply of commercial AC power to the power factor correction unit. According to claim 1, The abnormal power controller includes a plurality of comparators each of which receives a divided voltage of each PWM control unit at one end thereof and receives a reference voltage of the corresponding PWM control unit at the other end thereof; The PD module protection device of PD PD, characterized in that it comprises an OR gate for receiving the output of the plurality of comparators through an input terminal, respectively.