Capacitive-load driving circuit capable of properly handling temperature rise and plasma display apparatus using the same

• US 7,737,641 B2
• Filed: 02/10/2006
• Issued: 06/15/2010
• Est. Priority Date: 09/29/2000
• Status: Expired due to Fees

• Current Assignee: Maxell, Ltd.
• Original Assignee: Fujitsu Hitachi Plasma Display Limited (Hitachi, Ltd.)
• Inventors: Inoue, Hirokazu, Kishi, Tomokatsu, Takagi, Akihiro, Kawada, Toyoshi, Sano, Yuji
• Primary Examiner(s): Owens; Douglas W
• Assistant Examiner(s): TRAN, CHUC
• Application Number:
  US11/350,848
• Publication Number:
  US 20060125411A1
• Time in Patent Office: 1,586 Days
• Field of Search: 315/169.3, 315/160, 315/169.1, 315/167, 315/169.2, 315/169.4, 345/36, 345/183, 345 76- 83, 345210-212, 345/204, 345/65, 345/92, 345/101, 313/585, 313/586, 313/590
• US Class Current: 315/169.3
• CPC Class Codes: G09G 2310/0289 Details of voltage level shifters arranged for use in a driving circuit
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/045 Protection against panel overheating
• CPC Class Codes: G09G 3/28 using luminous gas-discharge panels, e.g. plasma panels
• CPC Class Codes: G09G 3/296 Driving circuits for producing the waveforms applied to the driving electrodes
• CPC Class Codes: G09G 3/2965 using inductors for energy recovery
• CPC Class Codes: H01J 11/26 Address electrodes
• CPC Class Codes: H05B 44/00 Circuit arrangements for operating electroluminescent light sources for operating light emitting diodes H05B45/00

Abstract

A capacitive-load driving circuit has a configuration in which a driving power supply source is connected to an output terminal via a driving device. The capacitive-load driving circuit has a power distributing circuit inserted between the driving power supply source and the driving device. Therefore, temperature rise (power consumption) in the capacitive-load driving circuit can be distributed.

Claims

1. An electrode driving circuit for a flat panel display apparatus including a configuration in which a driving power supply source and a reference potential point are connected to an output terminal via a corresponding driving device, wherein:

a power distributing circuit is inserted between at least one of the driving power supply source or the reference potential point and the driving device; and

the power distributing circuit is a different element from the driving device;

wherein the driving power supply source outputs a plurality of different voltage levels in a selective manner; and

wherein the power distributing circuit includes a plurality of power distributing units, one for each of the plurality of different voltage levels.

2. The electrode driving circuit for the flat panel display apparatus as claimed in claim 1, wherein each of the power distributing units has a function as a switch for selecting one of the plurality of different voltage levels.

3. An electrode driving circuit for a flat panel display apparatus having an output terminal and comprising:

a driving power supply source and a reference potential point connected to the output terminal by respective driving devices; and

a power distributing circuit connected between at least one of the driving power supply source or the reference power potential point and one of the driving devices;

wherein the driving power supply source outputs, selectively, a plurality of different voltage levels; and

wherein the power distributing circuit includes a plurality of power distributing units, one for each of the plurality of different voltage levels.

4. The electrode driving circuit for the flat panel display apparatus as claimed in claim 3, wherein each of the power distributing units functions as a switch to select one of the plurality of different voltage levels.

5. A plasma display apparatus having a plurality of display electrodes and address electrodes, comprising:

a driving device applying voltages to the address electrodes;

a driving power supply source supplying power to the driving device; and

a power distributing circuit inserted between the driving power supply source and the driving device, wherein the power distributing circuit is a different element from the driving device;

wherein the driving power supply source outputs, selectively, a plurality of different voltage levels; and

wherein the power distributing circuit includes a plurality of power distributing units, one for each of the plurality of different voltage levels.

6. A plasma display apparatus having a plurality of addressing electrodes, scan electrodes, and display electrodes and using a plurality of subframes for displaying an image of a frame, at least one of the subframes having an addressing period for selecting display cells and a sustain period for generating sustain discharge in the selected display cells, comprising:

an addressing driver applying addressing pulses to the plurality of address electrodes during the addressing period;

a scan driver applying scanning pulses having opposite polarity to that of the addressing pulses during the addressing period; and

a common driver applying sustain pulses to the display electrodes during the sustain period;

wherein the addressing driver has a driving power supply source supplying power of the address pulses, at least one addressing drive IC, which is connected to the power supply source and reference potential point, for applying the addressing pulses to a plurality of addressing electrodes corresponding with display data, and a resistive element which is inserted between the driving power supply source and the addressing drive IC or between the reference potential point and the addressing drive IC, wherein the addressing driver has a plurality of the addressing drive ICs.

7. A plasma display apparatus according to claim 6, wherein the impedance of the resistive element is higher than one-tenth of the resistive impedance that the addressing drive IC provides at the time of conduction.

8. A plasma display apparatus according to claim 6, wherein the addressing drive IC has a plurality of driving elements corresponding to N addressing electrodes, and the impedance of the resistive element is higher than one-tenth of conductive resistive impedance divided by N that one of the driving elements provides.

9. A plasma display apparatus having a plurality of addressing electrodes, scan electrodes, and display electrodes and using a plurality of subframes for displaying an image of a frame, at least one of the subframes having an addressing period for selecting display cells and a sustain period for generating sustain discharge in the selected display cells, comprising:

an addressing driver applying addressing pulses to the plurality of address electrodes during the addressing period;

a scan driver applying scanning pulses having opposite polarity to that of the addressing pulses during the addressing period; and

a common driver applying sustain pulses to the display electrodes during the sustain period;

wherein the scan driver applies intermediate voltage to the plurality of scan electrodes and selects a line by applying a scanning pulse having a voltage that is lower than the intermediate voltage, and the addressing driver applies the addressing pulse to the address electrodes when the scanning pulse is applied; and

wherein the addressing driver has a driving power supply source supplying power of the address pulses, at least one addressing drive IC, which is connected to the power supply source and reference potential point, for applying the addressing pulses to a plurality of addressing electrodes corresponding with display data, and a resistive element which is inserted between the driving power supply source and the addressing drive IC or between the reference potential point and the addressing drive IC, wherein the addressing driver has a plurality of the addressing drive ICs.

10. A plasma display apparatus according to claim 9, wherein the impedance of the resistive element is higher than one-tenth of the resistive impedance that the addressing drive IC provides at the time of conduction.

11. A plasma display apparatus according to claim 9, wherein the addressing drive IC has a plurality of driving elements corresponding to N addressing electrodes, and the impedance of the resistive element is higher than one-tenth of conductive resistive impedance divided by N that one of the driving element provides.