CN1750081A

CN1750081A - Driving method for color plasma display screen for saving frame storage content

Info

Publication number: CN1750081A
Application number: CNA2005100961550A
Authority: CN
Inventors: 尤剑鸣; 刘海峰
Original assignee: Irico Group Electronics Co Ltd
Current assignee: Sichuan Sterope Orion Display Co., Ltd.
Priority date: 2005-10-14
Filing date: 2005-10-14
Publication date: 2006-03-22
Anticipated expiration: 2025-10-14
Also published as: CN100362544C

Abstract

The color plasma display screen driving method with saving in frame storage capacity includes the first dividing the time for displaying one frame of image into time sections in the same number as the display lines, with each of the time section being corresponding to one addressing or holding stage; determining the addressing pulse number for each addressing stage the same as the number of sub-fields in each image frame; forming one straight line of slope -1 from the upper left corner to the lower right corner of the screen to obtain the data of first sub-field with the straight line passed line, rightwards shifting the time section of the first sub-field to obtain the second sub-field data, and so on to obtain the straight lines of all the sub-fields. During displaying, the data of one line is addressed while the data of the continuous new line are stored to the read out memory space. By means of the reasonable distribution of the sub-field display mode, only one set of frame memory is used in continuous image display in low cost.

Description

A kind of driving method for color plasma display screen of saving frame storage content

Technical field

The present invention relates to a kind of drive controlling and method for displaying image of color plasma display, particularly a kind of driving method for color plasma display screen of saving frame storage content.

Background technology

Color plasma display is to adopt sub-field type to realize that many grades gray scale of image shows, one two field picture time was divided into a plurality of sons field, each son different weight of distribution, corresponding different gray shade scales, by the various combination of antithetical phrase field, realize that many grades gray scale of image shows.Color plasma display is because the sub-displaying mode of its uniqueness, can not the TV signal data that receive directly be shown according to former form, when the view data of first row occurs, the successive image data do not occur, and at this moment need to show the first sub-field data of putting in order frame image data, so in color plasma display, when image is shown, need carry out the certain data format conversion, this just requires data are stored.

The method of the color plasma display of main flow employing at present is: two framing storeies (A and B) are set, and every group capacity is the size of frame data; When the data of present frame write frame memory A according to the sub-field type of color plasma display, show from frame memory B sense data; Because all data of having stored previous frame among the frame memory B are not so when reading, the situation that needs data presented invalid can occur.Data in frame memory B have shown and have finished, and at this moment, also just in time write frame data among the frame memory A, can from frame memory A, sense data show, at this moment, the new view data of input writes frame memory B according to the sub-field type of color plasma display.Like this, two framing storeies are read-write in turn, consecutive image satisfactorily can be shown.

Adopt two framing storeies, obviously improved the cost of color plasma display circuit.When scale of mass production, if the amount of frame memory is reduced half, the reduction of cost can obviously embody.Therefore, need by drive controlling reasonable in design and method for displaying image, the capacity that reduces frame memory reduces cost.

Summary of the invention

The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of half of classic method of the quantity of frame memory can being reduced to is provided, one framing storer promptly only is set, the driving method for color plasma display screen of the saving frame storage content that the color plasma display consecutive image satisfactorily can be shown again simultaneously.

For achieving the above object, the technical solution used in the present invention is: the time average that at first will show a two field picture is assigned as the time period that equates with the line number of display line in the image resolution ratio, and each time period perhaps keeps the phase as one as an address period; In each address period, the number of the row of required addressing is for being divided into each two field picture number that shows, promptly how many height fields each two field picture adopts realize, then in each address period, how many individual and this corresponding addressing pulses in child field are just arranged, how many row are carried out addressing; Determine that the method for the row of required addressing in each address period is as follows: do slope from the screen upper left corner to the lower right corner and be-1 straight line, owing to will show that the time average of a two field picture is assigned as the time period that equates with the line number of display line in the image resolution ratio, the data of every section just corresponding scanning of time delegation, this slope is exactly the data of the 1st son of corresponding required addressing of time period for the row of-1 straight line process, move right time period of weight of the 1st sub-place correspondence from this straight line, do slope and be-1 straight line, so, these two straight lines the row of process be exactly the second sub-field data in the corresponding row of corresponding required addressing of time period, and the like, make all sub-number of fields purpose straight lines, also just determined a certain period a certain son field of certain delegation's correspondence of required addressing; During demonstration, because the time period of being divided can not be divided exactly by the image gray levels that will show (256), 256 original grey level transition are become 240 gray levels, it is corresponding one by one with 240 new gray levels that gray shade scale in 256 gray levels 240 is reached following gray shade scale, and with the gray shade scale 240 in 240 gray levels of corresponding Cheng Xin all of the gray shade scale more than 240 in 256 gray levels, 240 new like this gray levels just can characterize 256 gray levels.

Because the present invention by the reasonable distribution of antithetical phrase displaying mode, has reduced the quantity of the employed frame memory of color plasma display, can realize only adopting a framing storer to realize the continuous demonstration of image, significantly reduce the cost of circuit.

Description of drawings

Fig. 1 is the synoptic diagram of display packing of the present invention;

Fig. 2 is the present invention's complete son synoptic diagram of arranging in a frame time.

Embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail.

Referring to Fig. 1, display mode of the present invention is that the time average that will show each two field picture is divided into the time period that equates with the line number of display line, each time period is an address period, perhaps being one keeps the phase, here resolution is 852 * 480, and each two field picture is adopted 8 sons, 256 grade gray scales of realization, the time average of so just the 16.67ms of each frame being removed reset period is divided into 480 time periods, each son field of display mode of the present invention is different in the starting and ending time of different display lines, here every line down, the starting and ending time of same son is moved a time period after successively.So the address period of certain delegation may be the demonstration phase of next line, referring to Fig. 2, (have multirow in the same time period and will carry out addressing for the row that in certain time period, will carry out addressing, as distributing for son field shown in Figure 2,8 son fields are exactly 8 row), this time period is exactly an address period, and the other times section is exactly the phase of keeping.Therefore, display mode of the present invention, address period is at each row.For a son distribution, the time period that each is such, 8 behavior address period are arranged, i.e. 8 addressing pulses are arranged, successively addressing of corresponding these 8 row in each time period.So just realized display mode of the present invention.

The method of the row of required addressing is as follows in each address period: do slope from the screen upper left corner to the lower right corner and be-1 straight line, and Fig. 1, the oblique line in the lower right corner is represented previous frame image data presented for extending the straight line of coming from upper left in 2.

Consider pairing row of different time segment addressing and sub-field data below.

For each frame, first son be from the first row delegation to the end, shared 480 time periods, and promptly by from top to bottom order, each time period addressing delegation, last time period is finished the addressing to last column.

With first a son principle, the section sometime for dotted line representative among Fig. 2 has 8 straight lines, these 8 straight lines the row of process, be exactly at this moment between 8 row of the required addressing of section.For every frame data, only need each time period from frame memory, to read the data of delegation, it should be noted that: this data line has just been represented the capacity of the required storage space that takies of data line, but be distributed in 8 row, and represented different sons, this from Fig. 2 process 8 oblique lines just as can be seen.And in general, because the number of the number of institute's time segment and display line is equal, so frame memory always writes the data of delegation in a period of time.Like this, in a period of time,, just can realize normally reading with the storer of a frame capacity fully to data line as long as the time that will write and read staggers.All can write the data of incipient newline in each time period, so for all display lines, always reading at this row of each row of data after all sub-field data write, guarantees the problem that can not occur reading in advance.Because the son of back is with same speed sense data, so after several rows, the reading the time that will take next frame of data.But because the integrating effect of human eye and the continuity of image, human eye is seen is still a complete image.Because the present invention's read-write is same speed, for the data of each row, before writing, the data of reading just in time are the capacity of data line, and the new data of this delegation just can write the storage space the inside of having read.The data of row to be shown can't be because of the appearance of the data of newline and are capped.

Therefore, use the storer that has only a frame capacity, the situation that the data that neither can take place to read also are not written into, the data that new delegation also can not take place override the situation of the data that also are not read out, and consecutive image can be shown satisfactorily.

Because a two field picture of the present invention is divided into 480 time periods, each grade gray scale can only be the integral multiple of time period, like this, can only realize the grade gray scale of aliquot 480 in theory, as 480,240,160 etc., but, 480 grade gray scales only do not express with 8, and 160 grade gray scales are less than original grade gray scale greatly in raw image data, image fault is bigger, select to realize 240 grade gray scales, the gray scale difference of high gray shade scale is not clearly for human eye, so as long as the gray shade scale more than 240 is all changed into 240, and with the gray shade scale 240 in 240 gray levels of corresponding Cheng Xin all of the gray shade scale more than 240 in 256 gray levels, 240 new like this gray levels just can characterize 256 gray levels.

Claims

1, a kind of driving method for color plasma display screen of saving frame storage content is characterized in that:

1) time average that at first will show a two field picture is assigned as the time period that equates with the line number of display line in the image resolution ratio, and each time period perhaps keeps the phase as one as an address period;

2) in each address period, the number of the row of required addressing is for being divided into each two field picture number that shows, promptly how many height fields each two field picture adopts realize, then in each address period, how many individual and this corresponding addressing pulses in child field are just arranged, how many row are carried out addressing;

3) determine that the method for the row of required addressing in each address period is as follows: do slope from the screen upper left corner to the lower right corner and be-1 straight line, owing to will show that the time average of a two field picture is assigned as the time period that equates with the line number of display line in the image resolution ratio, the data of every section just corresponding scanning of time delegation, this slope is exactly the data of the 1st son of corresponding required addressing of time period for the row of-1 straight line process, move right time period of weight of the 1st sub-place correspondence from this straight line, do slope and be-1 straight line, so, these two straight lines the row of process be exactly the second sub-field data in the corresponding row of corresponding required addressing of time period, and the like, make all sub-number of fields purpose straight lines, also just determined a certain period a certain son field of certain delegation's correspondence of required addressing;

When 4) showing, because the time period of being divided can not be divided exactly by the image gray levels that will show (256), 256 original grey level transition are become 240 gray levels, it is corresponding one by one with 240 new gray levels that gray shade scale in 256 gray levels 240 is reached following gray shade scale, and with the gray shade scale 240 in 240 gray levels of corresponding Cheng Xin all of the gray shade scale more than 240 in 256 gray levels, 240 new like this gray levels just can characterize 256 gray levels.