Method and device for driving plasma display panel

• US 6,870,521 B2
• Filed: 12/09/2002
• Issued: 03/22/2005
• Est. Priority Date: 01/22/2002
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Pioneer Corporation, Pioneer Display Products Corporation (Pioneer Corporation)
• Inventors: Iwami, Takashi
• Primary Examiner(s): Shankar, Vijay
• Application Number:
  US10/314,256
• Publication Number:
  US 20030137471A1
• Time in Patent Office: 834 Days
• Field of Search: 345/41, 345/55, 345/60, 345/62, 345/63, 345/66, 345/67, 345/68, 315160-176
• US Class Current: 345/60
• CPC Class Codes: G09G 2320/0238 Improving the black level
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/2927 Details of initialising
• CPC Class Codes: G09G 3/293 for address discharge
• CPC Class Codes: G09G 3/2932 Addressed by writing selected cells that are in an OFF state
• CPC Class Codes: G09G 3/2935 Addressed by erasing selected cells that are in an ON state

Abstract

The present invention provides a plasma display driving method and driving device which can improve image display contrast. The method comprises an address step for shifting the discharge cells into an emission enable state when the discharge cells corresponding to each pixel of the plasma display panel are in an emission disable state, by selectively causing the discharge cells to perform a selective writing discharge in accordance with the pixel data of each pixel, based on a video signal, thus generating wall charges in the discharge cells; and, on the other hand, when the discharge cells are in an emission enable state, shifting the discharge cells into an emission disable state by selectively causing the discharge cells to perform a selective erasing discharge in accordance with the pixel data, thus erasing the wall charges in the discharge cells; and an emission sustain step for causing only those discharge cells which are in the emission enable state to emit light repeatedly.

Claims

1. A plasma display panel driving method for driving a plasma display panel, in which discharge cells bearing pixels are formed at intersection points of a plurality of row electrodes corresponding to display lines and a plurality of column electrodes arranged so as to intersect said row electrodes, in a plurality of subfields constituting each field of a video signal, said method comprising:

an address step for setting each said discharge cell in accordance with the pixel data of each pixel based on said video signal either in an emission enable state or an emission disable state, for each said subfield; and

an emission sustain step for causing only said discharge cells in said emission enable state to emit light repeatedly,

wherein said address step comprises a step for, when said discharge cells are in said emission disable state, shifting said discharge cells to an emission enable state by selectively causing said discharge cells to perform a selective writing discharge in accordance with said pixel data, thus generating wall charges in said discharge cells; and

, on the other hand, when said discharge cells are in said emission enable state, shifting said discharge cells to an emission disable state by selectively causing said discharge cells to perform a selective erasing discharge in accordance with said pixel data, thus erasing the wall charges in said discharge cells.

2. The plasma display panel driving method according to claim 1, further comprising:

a reset step for setting all said discharge cells in said emission enable state by performing a reset discharge for all of said discharge cells only in the first subfield among said subfields within the field, immediately before said address step, thus causing the wall charges to be generated in each said discharge cell; and

an erasing step for setting all of said discharge cells in said emission disable state by performing an erasing discharge for all of said discharge cells only in the last subfield among said subfields within the field, immediately after said emission sustain step, thus erasing the charges existing in said discharge cells.

3. The plasma display panel driving method according to claim 1, wherein said address step further comprises:

a selective erasing step for imposing said selective erasing discharges by successively applying scanning pulses to each of said row electrodes, and applying, to said column electrodes, selective erasing data pulses having a pulse voltage in accordance with said pixel data, in synchronization with the application timing of each of said scanning pulses; and

a selective writing step for imposing said selective writing discharges by successively applying priming pulses to each of said row electrodes, immediately preceding the application of each said scanning pulse, and applying, to said column electrodes, selective writing data pulses having a pulse voltage in accordance with said pixel data, in synchronization with the application timing of each said priming pulse.

4. The plasma display panel driving method according to claim 1, further comprising the step of imposing priming discharge for causing priming particles to be formed in the discharge spaces of each said discharge cell, immediately preceding said selective erasing step.

5. A plasma display panel driving device for driving a plasma display panel, in which discharge cells bearing pixels are formed at each intersection point of a plurality of row electrodes corresponding to display lines and a plurality of column electrodes arranged so as to intersect said row electrodes, in a plurality of subfields constituting each field of a video signal, comprising:

an address component for setting each of said discharge cells either in an emission enable state or an emission disable state in accordance with the pixel data of each pixel based on said video signal, for each said subfield; and

an emission sustain component for causing said discharge cells to emit light repeatedly in said emission enable state,

wherein, when said discharge cells are in said emission disable state, said address component shifts said discharge cells to an emission enable state by selectively causing said discharge cells to perform a selective writing discharge in accordance with said pixel data, thus generating wall charges in said discharge cells; and

, on the other hand, when said discharge cells are in said emission enable state, said address component causes said discharge cells to shift to an emission disable state by selectively causing said discharge cells to perform a selective erasing discharge in accordance with said pixel data, thus erasing the wall charges in said discharge cells.

6. The plasma display panel driving device according to claim 5, further comprising:

a reset component for setting all said discharge cells in said emission enable state by performing a reset discharge for all of said discharge cells only in the first subfield among said subfields of said field, immediately preceding said address step, thus causing wall charges to form in each said discharge cells; and

an erasing component for setting all of said discharge cells in said emission disable state by performing an erasing discharge for all of said discharge cells only in the last subfield among said subfields of said field, immediately after said emission sustain step, thus erasing the charges existing in said discharge cells.

7. The plasma display panel driving device according to claim 5, wherein said address component further comprises:

a selective erasing component for imposing said selective erasing discharges by successively applying scanning pulses to said row electrodes, and applying, to said column electrodes, selective erasing data pulses having a pulse voltage in accordance with said pixel data, in synchronization with the application timing of said scanning pulses; and

a selective writing component for imposing said selective writing discharges by sequentially applying priming pulses to each said row electrode, immediately before the application of each said scanning pulse, and applying, to said column electrodes selective writing data pulses having a pulse voltage in accordance with said pixel data, in synchronization with the application timing of each said priming pulse.

8. The plasma display panel driving device according to claim 5, further comprising a component for imposing a priming discharge in order to cause priming particles to be formed in the discharge spaces of each said discharge cell, immediately before said selective erasing discharge.