Plasma display panel driving method and plasma display apparatus

• US 6,816,135 B2
• Filed: 06/06/2002
• Issued: 11/09/2004
• Est. Priority Date: 06/07/2001
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Pioneer Corporation, Shizuoka Pioneer Corporation
• Inventors: Iwami, Takashi, Nagaoka, Shiro, Kitagawa, Mitsushi, Ide, Shigeo
• Primary Examiner(s): Liang, Regina
• Assistant Examiner(s): Dinh, Duc Q.
• Application Number:
  US10/162,642
• Publication Number:
  US 20020186185A1
• Time in Patent Office: 887 Days
• Field of Search: 345/60, 345/63, 345/66.68, 345/690-691, 345/204, 345/211, 315/169.4
• US Class Current: 345/60
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/2037 with specific control of sub-frames corresponding to the least significant bits
• CPC Class Codes: G09G 3/2927 Details of initialising
• CPC Class Codes: G09G 3/2935 Addressed by erasing selected cells that are in an ON state
• CPC Class Codes: G09G 3/2937 being addressed only once per frame
• CPC Class Codes: G09G 3/2944 by varying the frequency of sustain pulses or the number of sustain pulses proportionally in each subfield of the whole frame

Abstract

A plasma display panel driving method and a plasma display apparatus which can reduce power consumption. A selective discharge is generated at least once for selectively setting each of discharge cells of a plasma display panel either to a lit discharge cell state or to an unlit discharge cell state in accordance with a video signal. In this case, the number of times the selective discharge is generated is changed in accordance with the power consumption associated with the selective discharge.

Claims

1. A plasma display panel driving method for driving a plasma display panel including a plurality of discharge cells carrying display pixels based on a video signal, said method comprising:

an addressing stage for generating a selective discharge at least once for setting each of said discharge cells to a lit discharge cell state or an unlit discharge cell stage in accordance with pixel data based on said video signal; and

a light emission sustain stage for causing only said discharge cell in said lit discharge cell state to repeatedly discharge,

wherein the number of times of said selective discharges generated in said addressing stage is changed in accordance with power consumption associated with said selective discharge.

2. A plasma display panel driving method according to claim 1, wherein the number of times said selective discharge is generated in said addressing stage is reduced when the power consumption is large as compared with when the power consumption is small.

3. A plasma display panel driving method according to claim 1, wherein the number of times said selective discharge is generated in said addressing stage is set to one or less when the power consumption is large.

4. A plasma display panel driving method according to claim 1, wherein the number of said discharge cells set to either said lit discharge cell state or said unlit discharge cell stage based on said pixel data is counted, and the counted number is used as an index indicative of the power consumption.

5. A plasma display panel driving method according to claim 1, wherein the power consumed by said selective discharge is power consumed in an address driver which generates a pixel data pulse for generating said selective discharge and applies the pixel data pulse to each of said discharge cells.

6. A plasma display panel driving method for driving a plasma display panel including a plurality of cells carrying display pixels in each of a plurality of subfields constituting one field of a video signal, wherein:

each of said subfield includes an addressing stage for selectively generating a selective discharge for setting each of said discharge cells to a lit discharge cell state or an unlit discharge cell stage in accordance with pixel data based on said video signal, and a light emission sustain stage for causing only said discharge cell in said lit discharge cell state to repeatedly discharge, and

said selective discharge is repeatedly generated in said addressing stage only in each of one subfield in each of said plurality of subfields constituting said one field and subfields subsequent to said one subfield and consecutive to each other when power consumption associated with said selective discharge is small, and the number of times said selective discharge is generated in a subfield subsequent to said one subfield is reduced when the power consumption is large.

7. A plasma display panel driving method for driving a plasma display panel including a plurality of cells carrying display pixels in a plurality of subfields constituting one field of a video signal, wherein:

each of said subfield includes an addressing stage for selectively generating a selective discharge for setting each of said discharge cells to a lit discharge cell state or an unlit discharge cell stage in accordance with pixel data based on said video signal, and a light emission sustain stage for causing only said discharge cell in said lit discharge cell state to repeatedly discharge, and

the number of said subfields constituting said one field is smaller when the power consumption associated with said selective discharge is large than when the power consumption is small.

8. A plasma display apparatus having a plurality of row electrode pairs corresponding to display lines and a plurality of column electrodes arranged to intersect with each of said row electrode pairs, and discharge cells each formed at each of intersections of said row electrode pairs and said column electrodes for carrying a pixel, wherein one field display period includes N subfields each comprised of an addressing period and a light emission sustain period for driving said plasma display panel, said plasma display apparatus comprising:

an address driver for generating a pixel data pulse for selectively discharging said discharge cells in said addressing period of one subfield in said N subfields and each of subfields subsequent to said one subfield and consecutive to each other to set said discharge cell to a lit discharge cell state or an unlit discharge cell stage, and applying said pixel data pulse to said column electrodes;

a sustain driver for repeatedly applying a sustain pulse to said row electrodes in said light emission sustain period in each of said subfields to repeatedly discharge only said discharge cells set in said lit discharge state to sustain light emission;

address driver power measuring part for measuring power consumed by said address driver; and

address power control part for changing the number of times said selective discharge is generated in a subfield subsequent to said one subfield in accordance with the power consumption.

9. A plasma display apparatus according to claim 8, wherein said address power control means reduces the number of times of said selective discharges generated in the subfield subsequent to said one subfield when the power consumption is large as compared with when the power consumption is small.

10. A plasma display apparatus according to claim 8, wherein said address power control means generates said selective discharge only in said addressing period in said one subfield when the power consumption is large.