KR20050114082A - Power supply device for plasma display panel and plasma display panel comprising the same - Google Patents

Abstract

A power supply apparatus for a plasma display panel and a plasma display panel having the same according to the present invention include: a standby power supply unit supplying a standby voltage to the plasma display panel; And a main power supply unit supplying a plurality of DC voltages different from the standby voltage to the plasma display panel.

The present invention provides a power supply device in which the output of the standby power supply unit and the output of the main power supply unit do not overlap, thereby realizing the circuit simplification, thereby reducing the number of parts, reducing the cost, and reducing the space occupied by the power circuit. have. In addition, the plasma display panel of the present invention can ensure the reliability of the product by controlling to apply / block the low voltage such as logic power source and switching power source separately from the high voltage.

Description

Power supply of plasma display panel and plasma display panel having same {Power supply device for plasma display panel and plasma display panel comprising the same}

The present invention relates to a display panel, such as a plasma display panel (PDP), and more particularly to a power supply for a display panel.

1 is a view showing the structure of a conventional three-electrode surface discharge plasma display panel.

Referring to FIG. 1, between the front and rear glass substrates 100 and 106 of a conventional surface discharge plasma display panel 1, address electrode lines A ₁ , A ₂ ,..., A _m , Dielectric layers 102 and 110, Y electrode lines Y ₁ , ..., Y _n , X electrode lines X ₁ , ..., X _n , fluorescent layer 112, barrier rib 114, and As a protective layer, the magnesium monoxide (MgO) layer 104 is provided, for example. The plasma forming gas is sealed in the discharge space 108.

2 illustrates a general driving device of the plasma display panel of FIG. 1.

Referring to the drawings, a typical driving device of the plasma display panel 1 includes an image processor 200, a controller 202, an address driver 206, an X driver 208, and a Y driver 204. The image processing unit 200 converts an external analog image signal into a digital signal, and internal image signals, for example, 8-bit red (R), green (G) and blue (B) image data, clock signals, vertical and horizontal, respectively. Generate synchronization signals. The controller 202 generates the driving control signals SA, SY, and SX according to the internal image signal from the image processor 200. The address driver 206 processes the address signal SA among the drive control signals SA, SY, and SX from the controller 202 to generate a display data signal, and generates the display data signal through the address electrode lines. To apply. The X driver 208 processes the X driving control signal SX among the driving control signals SA, SY, and SX from the controller 202 and applies the X driving control signal SX to the X electrode lines. The Y driver 204 processes the Y driving control signal SY among the driving control signals SA, SY, and SX from the controller 202 and applies the Y driving control signal SY to the Y electrode lines.

As a driving method of the plasma display panel 1 having the structure described above, an address-display separation driving method which is mainly used is disclosed in US Pat.

FIG. 3 is a timing diagram illustrating an example of a driving signal of the panel shown in FIG. 1. The address electrode A, the common electrode X, and the scan electrode in one subfield SF in the ADS driving method of the AC PDP. The drive signal applied to (Y1 to Yn) is shown. Referring to FIG. 3, one subfield SF includes a reset period PR, an address period PA, and a sustain discharge period PS.

The reset period PR initializes the wall charge state of all cells by applying reset pulses to the scan lines of all groups and forcibly performing a write discharge. In the address period PA, the bias voltage Ve is applied to the common electrode X, and the scan electrodes Y1 to Yn and the address electrodes A1 to Am are simultaneously turned on at the cell positions to be displayed, thereby displaying the display cells. Select. After the address period PA is performed, the sustain pulse Vs is alternately applied to the common electrodes X and the scan electrodes Y1 to Yn to perform the sustain discharge period PS. In PDP, the brightness is adjusted by the number of sustain discharge pulses.

2 and 3, the Y driving unit 204 requires a logic power source, a reset power source (Vs, Vset), a scan power source (V _SC-H , V _SC-L ), a holding power source (V _S ), and the like. do. X driving unit 208, require a logic power supply, X bias power source (Ve), holding power (V _S) and the like. In addition, the address driver 206 needs an address power source Va.

4 is a schematic block diagram illustrating a power supply unit of a plasma display panel.

The power supply unit is largely divided into a main power supply unit 500 and a standby power supply unit 502.

The main power supply unit 500 supplies various voltages V1... Vn and 506 required by the PDP module 506. The output voltages of the main power supply unit 500 include low voltages such as logic power supply (5V, 3.3V), switching power supply (12V), reset voltage (V _SET ), address voltage (V _A ), scan voltage (V_ _SC ), the sustain discharge voltage (V _S) includes a high voltage, such as the electrode drive voltage and the like. The power supply 506 of the image processor 504 is also low voltage.

The standby power supply unit 502 is connected to AC power, and supplies power to the image processor 504 in a state in which the main power supply unit 500 does not operate, that is, in a standby state.

The image processing unit 504 operates in the same manner as the image processing unit 200 of FIG. micom) and the like, and require a standby power source 508, for example, 5V, to be always operated.

In the above-described conventional power supply unit structure, since the logic power output 5V of the main power supply unit 500 and the standby power output 5V of the standby power supply unit 502 overlap, the cost increases due to the increase in the number of parts and the circuit. There are problems such as the complexity of the power supply and the increase of the space occupied by the power supply circuit.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a power supply device for a display panel having a new configuration and a display panel having the same.

According to an aspect of the present invention, there is provided a power supply apparatus for a plasma display panel and a plasma display panel including the same; a standby power supply unit supplying an standby voltage to the plasma display panel; And a main power supply unit supplying a plurality of DC voltages different from the standby voltage to the plasma display panel.

The standby voltage supply unit may include two output terminals for outputting the standby voltage, and one of the output terminals may include a first switching unit.

The main power supply unit may include an AC / DC converter converting an input AC voltage into a first DC voltage. And a DC / DC converter configured to convert the first voltage into a plurality of DC voltages and output the converted DC voltages.

The AC / DC converter may include: a rectifier for converting the input AC voltage into a rectified voltage; And a power factor correction unit configured to convert the rectified voltage into a power factor corrected first voltage.

The standby power supply unit may convert the rectified voltage into the standby voltage and supply the converted voltage to the plasma display panel.

The standby power unit may convert the rectified voltage or the first voltage to the standby voltage and supply the converted voltage to the plasma display panel.

According to another aspect of the present invention, there is provided a power supply apparatus for a plasma display panel and a plasma display panel having the same, the standby power supply unit supplying a standby voltage and a low voltage to the plasma display panel; And a main power supply unit supplying the plasma display panel with a plurality of DC voltages different from the standby voltage and the low low voltage.

The standby voltage supply unit may include two output terminals for outputting the standby voltage, and one of the output terminals may include a first switching unit.

The power supply device may further include a second switching unit for switching the low voltage output.

The low voltage may include at least one of 12V and 3.3V.

The main power supply unit may include an AC / DC converter converting an input AC voltage into a first DC voltage. And a DC / DC converter configured to convert the first voltage into a plurality of DC voltages and output the converted DC voltages.

The AC / DC converter may include: a rectifier for converting the input AC voltage into a rectified voltage; And a power factor correction unit configured to convert the rectified voltage into a power factor corrected first voltage.

The standby power supply unit may convert the rectified voltage into the standby voltage and supply the converted voltage to the plasma display panel.

The standby power unit may convert the rectified voltage or the first voltage to the standby voltage and supply the converted voltage to the plasma display panel.

Hereinafter, a configuration and an operation of a power supply apparatus for a plasma display panel and a plasma display panel having the same according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is a block diagram illustrating a plasma display panel including a power supply apparatus according to an exemplary embodiment of the present invention, wherein the standby power supply unit 910, the main power supply units 900, 902, and 904 and the first switching unit ( 922.

The standby power supply unit 910 supplies standby voltages 907 and V _SB to the plasma display panel. The standby power supply unit 912 is connected to the AC power supply, and supplies the standby power sources 907 and V _SB to the image processing unit 908 in a state where the main power supply unit 500 does not operate, that is, in a standby state. Where V _SB is for example 5V.

The image processor 908 operates in the same manner as the image processor 200 of FIG. 2, and controls the remote controller sensing unit 920 and the controller in the image processor 908 to sense a remote control signal 918 in a standby state. The standby power source 907 (V _SB ), for example, 5V, for always operating micom) or the like is required to be always input.

The PDP module 906 includes a panel provided with the electrodes of FIG. 1, a driver for driving the panel, a logic controller for outputting a control signal of the driver, and the like. The logic controller may use the same power source as the standby power source. In addition, in order to ensure the reliability of the PDP module 906, it is preferable to generate the control signals of the logic controller before other driving signals.

The power supply device of the present invention is a first switching unit 922 for applying / blocking the standby voltages 907 and V _SB to the PDP module 906 separately from the DC / DC converter 904 output voltage of the main power supply unit. ) May be provided. The first switching unit 922 applies / blocks standby power 907 and V _SB to the PDP module 906 by the PDP module turn on / turn off signal 916 sensed by the remote controller sensing unit 920.

The main power supply units 900, 902, and 904 supply various voltages V1... Vn, 905 required by the PDP module 906 and voltages required by the image processor 908.

The main power supply unit may include an AC / DC converter that converts an input AC voltage into a first DC voltage, and a DC / DC converter 904 that converts the first voltage into a plurality of DC voltages and outputs the plurality of DC voltages.

The AC / DC converter may include a rectifier 900 and a power factor correction unit 902.

The rectifier 900 includes a rectifier circuit such as a bridge diode to convert an input AC voltage into a rectified voltage 901.

The power factor correction unit 902 includes a power factor correction circuit including an inductor, a diode, a capacitor, and a switch to minimize waste of power consumption. In addition, the power factor correction unit 902 normally supplies the power factor correction voltage 903 that has stably boosted the voltage to the DC / DC converter 904.

The DC / DC converter 904 outputs a plurality of DC power supplies V1, V2,... Vn required by the PDP module 906. To this end, several DC / DC converters having different conversion ratios may be provided.

The output voltage of the DC / DC converter 904 includes voltages other than the standby voltages 907 and V _SB , that is, low voltages such as the logic power supply 3.3V and the switching power supply 12V, and the reset voltage of FIG. 3. V _S , V _SET ), the address voltage (V _A ), the scan voltage (V _{SC -H} , V _{SC -L} ), the sustain discharge voltage (V _S ), and the erase voltage applied to the X electrode in the reset period PR ( Ve) and a high voltage for driving an electrode such as a bias voltage Vb applied to the X electrode in the address period PA and Vb = Ve in FIG. 3 are included. In addition, the DC / DC converter 904 of the main power supply unit supplies low voltages (12V, 3.3V, etc.) required by the image processor 908.

Meanwhile, the standby power supply unit 910 may receive the rectified voltage 901 or the power factor-compensated first voltage 903 to secure reliability for instantaneous power failure (DIP).

FIG. 6 is a block diagram illustrating a plasma display panel including a power supply device according to another exemplary embodiment of the present invention. 922, a second switching unit 912.

The standby power supply unit 910 of FIG. 6 supplies the standby voltages 907 and V _SB and the low voltages V _L1 and V _Lm to the plasma display panel. The standby power supply unit 912 is connected to the AC power supply, and supplies the standby power sources 907 and V _SB to the image processing unit 908 in a state where the main power supply unit 500 does not operate, that is, in a standby state. Where V _SB is for example 5V. In addition, the standby power supply unit 910 supplies low voltages (V _L1 : V _Lm ), for example, 15V, 12V, and 3.3V to the PDP module 906 and the image processing unit 908 while the main power supply unit 500 operates.

The image processor 908 operates in the same manner as the image processor 200 of FIG. 2, and controls the remote controller sensing unit 920 and the controller in the image processor 908 to sense a remote control signal 918 in a standby state. The standby power source 907 (V _SB ), for example, 5V, for always operating micom) or the like is required to be always input.

The PDP module 906 includes a panel provided with the electrodes of FIG. 1, a driver for driving the panel, a logic controller for outputting a control signal of the driver, and the like. The logic controller may use the same power source as the standby power source. In addition, in order to ensure the reliability of the PDP module 906, it is preferable to generate the control signals of the logic controller before other driving signals. In addition to this, it is preferable to supply the low voltage required by the PDP module 906 and the image processor 908 before other high voltages.

The power supply device of the present invention is a first switching unit 922 for applying / blocking the standby voltages 907 and V _SB to the PDP module 906 separately from the DC / DC converter 904 output voltage of the main power supply unit. And a second switching unit 912 for applying / blocking the low voltages 914 and V _L1 : V _Lm to the PDP module 906 and the image processing unit 908.

The first switching unit 922 applies / blocks standby power 907 and V _SB to the PDP module 906 by the PDP module turn on / turn off signal 916 sensed by the remote controller sensing unit 920.

The second switching unit 912 receives the low voltages 914 and V _L1 : V _Lm by the PDP module turn on / turn off signal 916 sensed by the remote controller sensing unit 920 and the image processing unit ( 908 is applied / blocked.

In the plasma display panel of the present invention, low voltages such as logic power and switching power supplies (5V, 3.3V, 12V, 15V) are applied / blocked by the first switching unit 922 and the second switching unit 912 in addition to the high voltage. By controlling so as to ensure the reliability of the product.

The main power supply units 900, 902, and 904 supply various voltages V _H1 : V _Hn and 909 required by the PDP module 906. The voltages V _H1 : V _Hn and 909 except for the standby voltage 910 output voltages V _{SB and} V _L1 : V _{Lm of the} DC / DC converter 904 are supplied.

Meanwhile, the standby power supply unit 910 may receive the rectified voltage 901 or the power factor-compensated first voltage 903 to secure reliability for instantaneous power failure (DIP).

The plasma display panel according to the embodiment of the present invention may be implemented as having the above-described power supply device, for example, the driving device of FIG. 2 and the panel of FIG.

The best embodiments have been disclosed in the drawings and specification above. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, the present invention has the following effects.

The present invention realizes a circuit simplification by providing a power supply device in which the output of the standby power supply section and the output of the main power supply section do not overlap.

According to the present invention, there is an effect of reducing the number of parts, cost, and reducing the space occupied by the power supply circuit.

The plasma display panel of the present invention can ensure the reliability of the product by controlling to apply / block the low voltage such as the logic power supply and the switching power supply separately from the high voltage.

In addition, apart from the high voltage driving the electrode of the plasma display panel, a low voltage for generating various control signals may be applied.

The invention is not limited to the examples described above and represented in the drawings. Those skilled in the art taught by the above-described embodiments, many modifications to the above-described embodiments are possible by substitution, erasure, merging, etc. within the scope and object of the present invention described in the following claims.

1 is a view showing the structure of a conventional three-electrode surface discharge plasma display panel.

FIG. 2 shows a typical driving apparatus of the plasma display panel shown in FIG. 1.

3 is a timing diagram illustrating an example of a driving signal of the panel illustrated in FIG. 1.

4 is a schematic block diagram illustrating a power supply unit of a plasma display panel.

5 is a block diagram illustrating a plasma display panel including a power supply device according to an exemplary embodiment of the present invention.

6 is a block diagram illustrating a plasma display panel including a power supply device according to another exemplary embodiment of the present invention.

Claims (15)

A standby power supply unit supplying a standby voltage to the plasma display panel; And And a main power supply for supplying a plurality of DC voltages different from the standby voltage to the plasma display panel. The method of claim 1, wherein the standby voltage supply unit And two output terminals for outputting the standby voltage and a first switching unit at one of the output terminals. The method of claim 1, wherein the main power supply unit, An AC / DC converter converting the input AC voltage into a first DC voltage; And And a DC / DC converter configured to convert the first voltage into a plurality of DC voltages and output the converted DC voltages. The method of claim 3, wherein the AC / DC converter, A rectifier for converting the input AC voltage into a rectified voltage; And And a power factor correction unit for converting the rectified voltage into a power factor corrected first voltage. The method of claim 4, wherein the standby power supply unit, And converting the rectified voltage into the standby voltage and supplying the rectified voltage to the plasma display panel. The method of claim 5, wherein the standby power unit, And converting the rectified voltage or the first voltage into the standby voltage and supplying the rectified voltage to the plasma display panel. A standby power supply unit supplying a standby voltage and a low voltage to the plasma display panel; And And a main power supply unit supplying the plasma display panel with a plurality of direct current voltages different from the standby voltage and the low low voltage. The method of claim 7, wherein the standby voltage supply unit And two output terminals for outputting the standby voltage and a first switching unit at one of the output terminals. The method of claim 7, wherein the standby voltage supply unit And a second switching unit configured to switch the output of the low voltage. The method of claim 7, wherein the low voltage, Power supply of the plasma display panel comprising at least one of 15V, 12V and 3.3V. The method of claim 7, wherein the main power supply unit, An AC / DC converter converting the input AC voltage into a first DC voltage; And And a DC / DC converter configured to convert the first voltage into a plurality of DC voltages and output the converted DC voltages. The method of claim 11, wherein the AC / DC converter, A rectifier for converting the input AC voltage into a rectified voltage; And And a power factor correction unit for converting the rectified voltage into a power factor corrected first voltage. The method of claim 12, wherein the standby power supply unit, And converting the rectified voltage into the standby voltage and supplying the rectified voltage to the plasma display panel. The method of claim 13, wherein the standby power supply unit, And converting the rectified voltage or the first voltage into the standby voltage and supplying the rectified voltage to the plasma display panel. A plasma display panel comprising the power supply device according to any one of claims 1 to 14.