Claims
- 1. A method for driving a flat display panel with a gradation of visual brightness, the display panel having a plurality of pixels arranged in plural lines, each line having plural pixels and each pixel having a memory function, the method comprising:dividing, with time, each frame to be displayed on said display panel into a respective plurality of successive subframes, the subframes having respective, predetermined weights of brightness gradations and being individually selected to determine the brightness gradation of the respective frame, each subframe being applied at a common timing with respect to all of the plural lines of the display panel; further dividing, with time, each of the subframes into respective, first and second successive time periods, each time period having a respective, common timing with respect to all of the plural lines forming the display panel; controlling respective timings of a start of the first time period and of an end of the second time period of each subframe to be in common for all of the plural lines forming the display panel; setting the time duration of the second time period of each subframe in correspondence to the respective weight of the brightness gradation of that subframe; in the first time period of each subframe, writing display data in corresponding pixels of the display panel by selectively forming a memory medium in each of the corresponding pixels; in the second time period of each subframe, concurrently producing a display in each corresponding pixel in which a respective memory medium was formed in the first time period, for the respective time duration of the second time period of the subframe; and repeating the operations of the subframe with the first time period and the second time period so as to display a picture with gradation.
- 2. A method for driving a flat display panel with a gradation of visual brightness, the display panel having a plurality of pixels arranged in plural lines, each line having plural pixels and each pixel having a memory function, the method comprising:dividing, with time, each frame to be displayed on said display panel into a respective plurality of successive subframes, the subframes having respective, predetermined weights of brightness gradations and being individually selected to determine the brightness gradation of the respective frame, each subframe being applied at a common timing with respect to all of the plural lines of the display panel; further dividing, with time, each of the subframes into respective, first and second successive time periods, each time period having a respective, common timing with respect to all of the plural lines forming the display panel; controlling respective timings of a start of the first time period and of an end of the second time period of each subframe to be in common for all of the plural lines forming the display panel; setting the time duration of the second time period of each subframe in correspondence to the respective weight of the visual brightness gradation of that subframe; in the first time period, and at a common timing for each line of pixels and in succession for the plural lines, selectively forming a memory medium in each selected pixel of the plurality of pixels of said display panel using a first pulse train of a first pulse pitch; in said second time period of each subframe, concurrently producing a display at each selected pixel, in which a memory medium was formed, for the time duration of the second time period of the respective subframe and in succession for the plural subframes of each frame using a second pulse train having a second pulse pitch, a respective number of pulses of the second pulse train being supplied for display in the second time period in accordance with the predetermined weights of the brightness gradations thereof; and repeating the operations of the subframe with the first time period and the second time period so as to display a picture with gradation.
- 3. A method of driving a matrix display panel as claimed in claim 2, wherein the first and second pulse pitches are of different values.
- 4. A method of driving a matrix display panel as claimed in claim 3, wherein the second pulse train has a common pulse pitch in each of the plurality of successive subframes of a frame.
- 5. A method of driving a matrix display panel as claimed in claim 2, wherein the respective, second time periods of the plurality of successive subframes are of a common duration and, for the plurality of successive subframes, the respective second pitches of the respective second pulse train are of respective, different values in accordance with the predeternined, different weights of the respective visual brightness gradations of the successive subframes.
- 6. A method of driving a matrix display panel having a plurality of cells arranged in a plurality of lines, each of the cells having a memory function, the method comprising:dividing a period of a display frame of plural lines into a plurality of successive subframes, each subframe having an addressing period during which cells to be lit later in a display period are selected from all of the cells so as to have a wall charge therein, and a display period subsequent to the addressing period for lighting the selected cells by concurrently applying sustain pulses to all of the cells, each display period being independent of the addressing period for the all lines, the respective numbers of sustain pulses applied in the plurality of successive subframes depending on predetermined weights of brightness gradations of the plurality of successive subframes.
- 7. A method of driving a matrix display panel as recited in claim 6, wherein the respective numbers of sustain pulses applied in the displaying periods of the plurality of successive subframes are chosen so that the visual brightness gradations meet desired gamma characteristics.
- 8. A method of driving a matrix display panel having a plurality of pixels arranged in a plurality of lines, each of said pixels having a memory function, said method comprising:dividing a period of a display frame into a plurality of subframes, wherein the plurality of lines are concurrently activated in each subframe, each subframe including respective and successive addressing and displaying periods; in each addressing period, addressing a pixel by selectively forming a memory medium, according to said memory function, in a selected pixel of a selected line, sequentially for the plurality of lines, and, in the respective, successive displaying periods, lighting each addressed pixel by concurrently applying sustain pulses to all the pixels, the plurality of successive subframes being allocated respective, predetermined numbers of the sustain pulses in accordance with respective, predetermined weights of visual brightness gradations thereof; and an order of the respective subframes of a frame being selected arbitrarily in advance of producing a display in accordance with display conditions.
- 9. A method of driving a plasma display panel having a plurality of parallel first electrodes, a plurality of second electrodes each of which is disposed between adjacent ones of said first electrodes and a plurality of third electrodes in parallel with each other in a crossing direction relative to said first and second electrodes, a plurality of first cells being formed substantially at respective first positions defined by crossed points of the first electrodes and said third electrodes and a plurality of second cells being formed between the first electrodes and the second electrodes at respective second positions corresponding to the first positions of the first cells, wherein the first cells are selectively addressed corresponding to a picture to be displayed and said second cells display the picture corresponding to the selected ones of the first cells, the method comprising:dividing a period of a display frame into a plurality of subframes, each subframe including respective and successive addressing and displaying periods, each said displaying period being independent of the addressing period with respect to all of the first and second cells; in each addressing period, addressing said first cells by selectively forming a wall charge in a selected one of said first cells on each sequentially selected one of said first electrodes, and, in the respective, successive displaying period, lighting said second cells corresponding to selected ones of said first cells by concurrently applying sustain pulses to all the second cells, the plurality of successive subframes being allocated respective, predetermined numbers of the sustain pulses in accordance with respective, predetermined weights of visual brightness gradations thereof; and an order of each one of said subframes is arbitrarily chosen in advance corresponding to a displaying condition.
- 10. A method as recited in claim 9, wherein the addressing further comprises:applying a pulse concurrently between plural first electrodes and plural second electrodes while keeping plural third electrodes at a predetermined voltage, before the first cells are selectively addressed, so that respective wall charges are generated in each of the first and second cells.
- 11. A method of driving a matrix display panel, formed of a plurality of cells arranged in a plurality of lines, each cell being capable of having a charge accumulated therein, the method comprising:dividing a period of a frame displaying a single picture into a plurality of successive subframes, each subframe including an addressing period and a displaying period which is independent of said addressing period with respect to all of the lines; in each addressing period, performing an addressing operation by erasing the charge accumulated in each unselected cell of a selected line, in sequence for the plurality of lines and, in the related displaying period, the selected cells being lit by concurrently applying sustain pulses to all of the plurality of cells, wherein each subframe of the plurality of successive subframes is allocated a predetermined number of sustain pulses in accordance with respective, predetermined brightness gradations of the plurality of successive subframes, a gradation of brightness of a selected cell in a given frame being determined by the total number of sustain pulses applied to the cell in the respective subframes of the given frame.
- 12. A method of driving a matrix display panel, formed of a plurality of pixels each having a memory function, comprising:dividing with time a period of a frame displaying a single picture into a plurality of subframes, each subframe comprising: an address period, executed during a common time for all the pixels, to address a pixel by selectively forming a memory medium in a selected pixel of al the pixels, and a display period, independent from said address period, to light said addressed pixel by an application of sustain pulses to all the pixels, each display period of the respective subframe being allocated a predetermined number of said sustain pulses, said allocated number being different for each subframe so as to weight a gradation to said respective subframe, whereby a gradation of visual brightness of said lit pixel is determined by selectively performing the address operation in each address period of said divided subframe for each of said pixels for each frame.
Priority Claims (6)
Number |
Date |
Country |
Kind |
2-331589 |
Nov 1990 |
JP |
|
4-012976 |
Jan 1992 |
JP |
|
4-106953 |
Apr 1992 |
JP |
|
4-106955 |
Apr 1992 |
JP |
|
4-96203 |
Apr 1992 |
JP |
|
4-110921 |
Apr 1992 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of application Ser. No. 08/888,442, filed Jul. 3, 1997, now U.S. Pat. No. 6,097,357 in turn a continuation-in-part of, and incorporates by reference herein each of:
(1) immediate (first) parent application Ser. No. 08/800,759, filed Feb. 13, 1997, now U.S. Pat. No. 6,195,070 in turn a continuation of Ser. No. 08/469,815, filed Jun. 6, 1995, now allowed as U.S. Pat. No. 5,661,500, and Ser. No. 08/458,288 filed Jun. 2, 1995, now allowed as U.S. Pat. No. 5,674,553, both, in turn a continuation and a divisional, respectively, of application Ser. No. 08/010,169, filed Jan. 28, 1993, now abandoned, and claims priority benefit under 35 USC §119 to Japanese Patent Application Nos. 4-012976, filed Jan. 28, 1992, 4-096203 filed Apr. 16, 1992, 4-106953 filed Apr. 8, 1992, 4-106955 filed Apr. 8, 1992, and 4-110921 filed Apr. 30, 1992; and
(2) immediate (second) parent application Ser. No. 08/674,161, filed Jul. 1, 1996, now allowed as Ser. No. 5,724,054, in turn a division of Ser. No. 08/405,920, filed Mar. 16, 1995 and issued as U.S. Pat. No. 5,541,618 on Jul. 30, 1996, in turn a continuation of Ser. No. 08/181,959, filed Jan. 18, 1994, now abandoned, in turn a continuation of Ser. No. 07/799,255, filed Nov. 27, 1991, now abandoned, and claims priority benefit under 35 USC §119 to Japanese Patent Application No. 2-331589, filed Nov. 28, 1990.
US Referenced Citations (24)
Foreign Referenced Citations (25)
Number |
Date |
Country |
0 157 248 |
Oct 1985 |
EP |
0 366 117 |
May 1990 |
EP |
0 436 416 |
Jul 1991 |
EP |
2 662 534 |
Nov 1991 |
FR |
49-115242 |
Nov 1974 |
JP |
50-135979 |
Oct 1975 |
JP |
51-032051 |
Sep 1976 |
JP |
55-5663 |
Feb 1980 |
JP |
56-094395 |
Jul 1981 |
JP |
57-078751 |
May 1982 |
JP |
61-039341 |
Feb 1986 |
JP |
62-51133 |
Mar 1987 |
JP |
62-180932 |
Aug 1987 |
JP |
63-151997 |
Jun 1988 |
JP |
63-060495 |
Nov 1988 |
JP |
1-304638 |
Dec 1989 |
JP |
1-311540 |
Dec 1989 |
JP |
2-148645 |
Jun 1990 |
JP |
02-219092 |
Aug 1990 |
JP |
2-226699 |
Sep 1990 |
JP |
02-291597 |
Dec 1990 |
JP |
3-77238 |
Apr 1991 |
JP |
03-078937 |
Apr 1991 |
JP |
3-101031 |
Apr 1991 |
JP |
3-269933 |
Dec 1991 |
JP |
Non-Patent Literature Citations (9)
Entry |
Kubo, Akira et al., “Full Color Surface-Discharge ac Plasma Display Panels”, ITEJ. Technical Report vol. 12, No. 49, pp. 49-54, EP '88-57.10 '88-93 (Nov. 1988). |
Shinoda et al., “Low-Voltage Operated AC Plasma-Display Panels,” IEEE Transactions On Electron Devices, vol. ED-26, No. 8, Aug. 1979, pp. 1163-1167. |
Gay et al., “Color Plasma Display Panels with Simplified Structure and Drive,” SID 88 Digest, SID International Symposium—Digest of Technical Papers, May 24-26, 1988, Anaheim, CA, pp. 157-159. |
Ruckmongathan, T.N., “A Generalized Addressing Technique for RMS Responding Matrix LCDS,” 1988 International Display Research Conference, pp. 80-85. |
Uchiike et al., “An 86-Ipi High-Resolution Full-Color Surface-Discharge ac Plasma Display Panels,” Proceedings of the SID, vol. 31, No. 4, 1990, New York, NY, pp. 361-365. |
Yoshikawa et al., “A Full Color AC Plasma Display with 256 Gray Scale,” Japan Display '92, Article S16-2, pp. 605-608. |
Holz, G.E., “Pulsed Gas Discharged Display with Memory,” Burroughs Corporation, ECD, Plainfield, N.J. (2 pages). |
Makino et al., “Improvement of Video Image Quality in AC-Plasma Display Panels by Suppressing the Unfavorable Coloration Effect with Sufficient Gray Shades Capability,” ASIA Display '95, Proceedings of the Fifteenth International Display Research Conference, Oct. 16-18, 1995, Hamamatsu, Japan, Article S19-3, pp. 381-384. |
Osamu, T., “Innovation and Commercial Viability of Large Area Plasma Display through Fujitsu's Continued R&D Activities,” IDW '96, Proceedings of the Third International Display Workshops, vol. 2, Nov. 27-29, 1996, Kobe, Japan, pp. 7-10. |
Continuations (6)
|
Number |
Date |
Country |
Parent |
08/888442 |
Jul 1997 |
US |
Child |
09/451351 |
|
US |
Parent |
08/469815 |
Jun 1995 |
US |
Child |
08/800759 |
|
US |
Parent |
08/458288 |
Jun 1995 |
US |
Child |
08/469815 |
|
US |
Parent |
08/010169 |
Jan 1993 |
US |
Child |
08/469815 |
|
US |
Parent |
08/181959 |
Jan 1994 |
US |
Child |
08/405920 |
|
US |
Parent |
07/799255 |
Nov 1991 |
US |
Child |
08/181959 |
|
US |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
08/800759 |
Feb 1997 |
US |
Child |
08/888442 |
|
US |
Parent |
08/674161 |
Jul 1996 |
US |
Child |
09/451351 |
|
US |