KR20000077213A - Drive method and drive apparatus for plasma display - Google Patents

Abstract

A plasma display device capable of reducing power consumption during line image data recording operations in a plasma display device is provided.

Plasma display unit 1 having scan line unit 6 and data line unit 5, scan driver means 7 for selecting one scan line from scan line unit 6, scan controller means 8, data Plasma display device 30 comprising a register line 3 for recording line image data having bit portions connected to each of the data lines of line portion 5, and image data buffer means 2 for latching line image data for one frame. ), Line image data constituting a plurality of different lines different from that of the first line image data currently being recorded on the predetermined scan line 6 is displayed after the first line image data. And a second line image data candidate storage register (31) which is stored as a candidate of second line image data for recording in a second field.

Description

Driving method and drive apparatus for plasma display

The present invention relates to a plasma display driving method and a plasma display device, and more particularly, to a plasma display driving method and a plasma display device for reducing power consumption.

Many techniques have been disclosed as a conventional plasma display driving method or a plasma display device.

For example, as shown in FIG. 2, the conventional plasma display device 20 includes a plasma display unit 1 having a scan line unit 6 and a data line unit 5, and a corresponding scan line unit 6. A high-voltage buffer section on each of the plurality of data lines constituting the scan driver means 8 for controlling the scan driver means, the scan controller means 8 for controlling the scan driver means, and the data line part 5; 4) an image data buffer for calling and latching a recording line image data register portion 3 having a bit portion 10 and a line image data for one frame from a suitable image data storage means not shown; And means (2) and control means (9) for comprehensively controlling the respective means.

In the related art plasma display apparatus, line image data for each horizontal line is sequentially selected from line image data for one frame temporarily stored in the image data buffer means 2 in the order of the number of line scans. The line display data is latched in the write data register 3 and, for example, specified by the scan controller 8 via the high-pressure buffer means 4, and the line image data is placed at the activated line scan number position. Is written on each of the data lines 5).

As a result, in the conventional plasma display apparatus, since the line image data for one frame is recorded in the plasma display unit 1 in the horizontal line number order, the line image data of the number of individual line scans is recorded. Each time, the charge of each data line 5 is charged and discharged, so that the charge and discharge cycle is increased and the wiring capacity of each data line 5 is also high, resulting in a problem of increased power consumption.

As a result, when the number of write operations (charge and discharge) of each pixel is large for driving a high voltage and capacitive load, power consumption increases in proportion to it.

Also, Japanese Patent Laid-Open No. 7-99461 discloses a circuit for performing PSK demodulation and PCM demodulation, a D / A converter, and a low-pass filter circuit, which are used for audio reproduction circuits of satellite broadcasting and the like, on the same chip. Although the formed integrated circuit is described, there is no disclosure or suggestion regarding the driving method of the PDP.

It is therefore an object of the present invention to provide a plasma display device and a plasma display driving method which can reduce the above-described drawbacks of the prior art and can reduce power consumption during line image data recording operations in a plasma display device. .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram illustrating a configuration of one specific example of a plasma display device according to the present invention.

Fig. 2 is a block diagram showing an example of the configuration of a plasma display device in the related art.

* Description of the symbols for the main parts of the drawings *

1: plasma display unit 2: image data buffer means

3: Register section for recording line image data 4: High pressure buffer section

5: data line portion 6: scan line portion

7: Scan driver means 8: Scan controller means

9: control means 10: bit part

20: conventional plasma display apparatus 21: image data storage means

22: unit of accuracy calculation unit 23: Exclusive-OR circuit

24: addition circuit 25: data selection means

26: Comparative operation means 30: Plasma according to the present invention

Display device

31: second line image data 32: first register portion

Candidate storage registers

33: second register section

Means to solve the problem

In order to achieve the above object, the present invention employs a technical configuration as described below.

That is, as the first example according to the present invention, in the plasma display apparatus, the first line image data currently recorded in the predetermined first line of the current plasma display unit in all image data constituting one frame is applied. As the second line image data for recording another line image data constituting a plurality of different lines different from the first line in the plasma display after the first line image data, as a plurality of other line image data candidates. Extracts and calculates the degree of agreement between each of the extracted plurality of types of line image data candidates and the first line image data, and applies other line image data having the greatest degree of agreement with the first line image data. Second line image data to be recorded on the plasma display after the first line image data Is a plasma display driving method configured to record the second line image data on a predetermined line in the plasma display, and as a second example according to the present invention, a scan line portion and a data line portion A plasma display unit having: a scan driver means for selecting a plurality of scan lines constituting the scan line portion, a scan controller means for controlling the scan driver means, and a bit unit connected to each of the plurality of data lines constituting the data line portion A plasma display device comprising: a register portion for recording line image data; and an image data buffer means for latching line image data for one frame, the plasma display apparatus comprising: a first line image data currently being recorded on a predetermined first line of the plasma display portion; Against, the first Second line image data candidate for storing other line image data constituting a plurality of different lines different from the line as candidates of second line image data for recording in the plasma display after the first line image data. It is a plasma display device provided with a storage register.

Embodiment of the present invention

Since the plasma display apparatus and the plasma display driving method according to the present invention employ the above-described technical configuration, the data variation is not changed with respect to any line image data in the current recording while adding a simple circuit configuration. Therefore, since the line image data is selected as a candidate of the line image data to be recorded next, the line image data having fewer charge / discharge cycles to the capacitive load is configured to record the line image data, so that power consumption can be effectively reduced. Become.

Example

EMBODIMENT OF THE INVENTION Below, the structure of one specific example of the plasma display apparatus which concerns on this invention is demonstrated in detail, referring drawings.

1 is a cross-sectional view for explaining the outline of the configuration of one specific example of the plasma display device 30 according to the present invention. In the figure, a plasma display unit having a scan line unit 6 and a data line unit 5 is shown. (1), scan driver means 7 for selecting one scan line from a plurality of scan line groups constituting the scan line part 6, and scan controller means 8 for controlling the scan driver means 7 A register part 3 for recording line image data having a plurality of bit portions 10 connected to each of a plurality of data lines constituting the data line portion 5, and an image for latching line image data for one frame. In the plasma display device 30 constituted of the data buffer means 2, the first line image data currently being recorded on the first predetermined scan line 6 of the plasma display unit 1 is the first. Second line image data candidate storage for storing other line image data constituting a plurality of different lines different from the cause and effect as candidates for second line image data for recording in the plasma display after the first line image data. The plasma display device in which the register 31 is provided is shown.

The second line image data candidate storage register 31 is provided with a plurality of individual line image data storage registers in parallel, and at least two types of second line image data candidate storage registers 32 and 33 are provided. It is preferable that it is done.

In the first register section 32 of the second line image data candidate storage register 31 according to the present invention, the n-th second line image data candidate extracted as the plurality of types of second line image data. Is stored, and the second register section 33 is configured to store the m-th second line image data candidate extracted as the plurality of second line image data.

As a result, in the present invention, the image data buffer means stores the line image data of one frame (consisting of the first line scan to the xth line scan) extracted from the appropriate image data storage means 21. Once stored in (2), the line image data having an arbitrary horizontal line scan number (for example, the first line image data of the line scan number) from the image data buffer means 2 is first line image data. The first line image data, which is first stored in the first line image data recording register 3 and stored in the first line image data recording register 3, is first shown, for example, in FIG. Through the high pressure buffer 14 as described above, the scan controller means 8 responds to the line scan number of the selected arbitrary first line image data. The data is written to the scan line 6 having the corresponding line scan number being activated through the corresponding scan driver 7.

While the first line image data is being recorded in the selected line scan 6, by the data selecting means 25, the image data buffer means 2 latches the line image data for the one frame. From the stored line image data group for one frame, any line scan number (for example, the nth except the line image data having the first line scan number) excluding the line image data in the current recording; the second line after the recording operation of the first line image data of the plurality of types of at least two types of line image data having the m-th, ...- th x-th line scan number) It is selected as a line image data candidate for recording as image data, and is individually stored in each of the first registers 32 and 33 of the second line image data candidate storage register 31. And lead.

In the present invention, the line scan numbers of the plurality of types of line image data selected as the second line image data candidates are arbitrary, and line image data having consecutive line scan numbers may be selected or randomly selected. You may bring it.

Preferably, it is efficient to select from a group of line scan numbers within a certain range, but it is not necessarily limited to this.

As a result, in the present invention, it is necessary that the number of the plurality of types of line image data selected as the second line image data candidate matches the number of registers provided in the second inter-line image data candidate storage register 31. Do.

In the following description, the second line image data candidate storage register 31 is provided with a first register 32 and a second register 33 for storing two second line image data candidates. Although it demonstrates, this invention is not limited to the structure concerned.

In the plasma display device 30 used in the present invention, the configuration of the plasma display unit 1 is not particularly limited, and a conventionally known plasma display unit can be used.

In this specific example in the present invention, a plurality of types of each of the registers 32 and 33 of the second line image data candidate storage register 31 are stored with respect to the first line image data in the recording. Both lines are formed from the state of each bit constituting both line image data using the coincidence degree calculating means 22 for calculating the coincidence degree of each of the second line image data candidates and the first line image data. It is judged to what extent the image data match, and from the corresponding degree of information calculated by the matching degree calculating means 22, the degree of matching with the first line image data is compared by the comparison calculating means 26. A second line for recording the largest other line image data (second line image data candidate) on the plasma display after the first line image data; It is configured to select a data.

More specifically, the correspondence degree calculating means 22 according to the present invention includes all data bits constituting the first line image data and each line image extracted as candidates of the second line image data. It is preferable that the data is configured to compare all data bits corresponding to each other, and more specifically, the matching degree calculating unit 22 includes the first line image data and the second line image data of the current recording. An exclusive-OR circuit 23-1 for comparing the bits corresponding to each other among all the bits constituting the n-th line image data among the plurality of types of line image data candidates for And an addition circuit 24-1 for adding the operation value of each bit by the exclusive-OR circuit 23-1, and performing the arithmetic processing in the addition circuit 24-1.It is preferably configured to In calculating the degree of matching of the line image data between the two.

Similarly, each bit corresponding to each other among all bits constituting the m-th line image data among a plurality of types of line image data which are candidates for the first line image data and the second line image data currently being recorded. An addition circuit 24-2 that adds an operation value of each bit by the exclusive-OR circuit 23-2 for comparing each other with the exclusive-OR circuit 23-2. Is provided, and it is preferable to be configured to calculate the degree of agreement of the line image data between the two by performing arithmetic processing in the addition circuit 24-2.

Finally, a total number comparison means 26 for comparing the match accuracy calculation values output from the addition circuits 24-1 and 24-2 is provided, and the total number comparison circuit 26 provides the first line image. Between the data and each of a plurality of types of line image data (line image data of the nth line scan number and line first image data of the mth line scan number) serving as candidates of the second line image data. It is desired to configure such that the second line image data candidate having the greatest degree of agreement with the first line image data is selected from the plurality of types of corresponding degree of matching data.

In the present invention, when the recording of the first line image data is completed, the line image data as the selected second line image data candidate is stored in the recording line image data register section 3 by the above-described method, At the same time as the recording operation is started, a plurality of types of line image data having different line scan numbers are newly selected by the data selecting means 25, and the first and second line image data candidate storage registers 32 and 33 are selected. ) Will be stored individually.

That is, in the present invention, the first line image data is initially stored in the recording data register 3, and after the line image data which is a candidate of the second line image data is selected and determined, the recording data The first line image data stored in the register 3 is configured to be replaced with the second line image data.

As described above, in the present invention, each bit constituting each of the line image data is to some extent between the first line image data currently being recorded and the second line image data to be recorded next. It is possible to reduce the number of charge / discharge operations in recording the line image data on the data line 5 of the plasma display, as the number of bits that match each other is determined by determining whether or not they match. Similarly, the order of the line scan numbers is changed to select the line image data having a high degree of coincidence between the first line image data and the data currently being recorded as the second line image data to be recorded after the recording operation of the first line image data. To record the line image data.

Consequently, as a feature of the present invention, in the horizontal line scan, the order of writing the data is changed so that the line scan number is ignored and the arrangement of the line scan order of the line image data is changed so that the variation of data, i.e., the number of charges and discharges, is reduced. It is configured to run the record.

After the above operation is repeated, the line image data group for one frame is recorded, and then the light emission operation is performed to display the image.

As a result, in the present invention, since the number of charge / discharge cycles during data writing in the plasma display device decreases, the power consumption consumed by the pixel load capacity can be significantly reduced.

Next, a plasma display driving method which is another example of the present invention will be described. As is apparent from the above description, the plasma display driving method according to the present invention basically has the following configuration.

That is, in the plasma display device 30, the first line image data currently being recorded on the predetermined first line of the current plasma display unit in all image data constituting one frame is different from the first line. Another line image data constituting a plurality of different lines is extracted as a plurality of other line image data candidates as second line image data for recording in the plasma display after the first line image data, and the extracted The degree of agreement between each of the plurality of types of line image data candidates and the first line image data is calculated, and the other line image data having the greatest degree of agreement with the first line image data is converted into the first line image data. Next, it is selected as the second line image data to be recorded on the plasma display, and the plasma A given line in the display, it is configured to record the second line image data.

In the plasma display driving method according to the present invention, at least two types of line image data are used as candidates of line image data to be recorded after the recording operation of the first line image data as the second line image data. It is preferred to be selected.

Furthermore, in the plasma display driving method according to the present invention, the calculation of the degree of coincidence in the plurality of different kinds of the corresponding line image data includes all the data bits constituting the first line image data and It is also preferably configured to compare all data bits corresponding to each other of each of the line image data extracted as candidates of the two line image data.

Further, in the plasma display driving method according to the present invention, the nth line image data among a plurality of types of line image data serving as candidates for the first line image data and the second line image data currently recorded. The comparison operation is performed using the exclusive OR (EX-OR) among the bits corresponding to each other, and the operation values of each bit are arithmetic processed by an addition circuit. It is also preferable to configure so as to calculate the degree of agreement of the line image data.

On the other hand, from a plurality of types of correspondence degree data computed between each of the plurality of types of line image data serving as candidates for the first line image data and the second line image data, a corresponding comparison circuit is used. It is also preferable to configure such that the second line image data candidate having the greatest degree of agreement with the first line image data is selected.

In the present invention, the first line image data is initially stored in a predetermined write data register, and after the line image data that is a candidate of the second line image data is selected and determined, the first line image data is stored in the write data register. It is also preferable that the first line image data stored is replaced with the second line image data.

Since the present invention employs the above-described technical configuration, in the recording operation of the line image data, the line image data for one frame of the corresponding image of the first line image data and the second line image data that are continuously recorded. Since the data recording order is selected so that the data fluctuations are small from the group and the number of charge / discharges to the capacitive load is reduced, the recording (charge / discharge) is performed, thereby enabling a significant reduction in power consumption.

Claims (14)

A plasma display apparatus comprising: a plurality of different lines different from the first line with respect to first line image data currently being recorded on a predetermined first line of all plasma image data constituting one frame. The other line image data to be configured is extracted as a plurality of other line image data candidates as second line image data for recording the plasma line display next to the first line image data, and the extracted plurality of line images. The degree of coincidence between each of the data candidates and the first line image data is calculated, and the other line image data having the greatest degree of coincidence with the first line image data is converted into the plasma display next to the first line image data. Selected as second line image data to be recorded in the corresponding plasma display In a given line in the plasma display driving method which is characterized in that it is configured to record the second line image data. The method of claim 1, And at least two types of line image data are selected as the second line image data as candidates of line image data to be recorded following the recording operation of the first line image data. The method according to claim 1 or 2, The calculation of the degree of coincidence in the plurality of different kinds of the corresponding line image data is performed by all the data bits constituting the first line image data and the respective line image data extracted as candidates of the second line image data. A plasma display driving method, characterized by comparing all data bits corresponding to each other. The method according to any one of claims 1 to 3, Each of the bits corresponding to each other among all the bits constituting the n-th line image data among the plurality of types of line image data which are candidates for the first line image data and the second line image data currently being recorded are selected. A comparison operation is performed using an exclusive OR (EX-OR), and the operation value of each bit is computed by an addition circuit to calculate the degree of agreement of the line image data between the two. Plasma display driving method. The method of claim 4, wherein A corresponding first comparison image using a total comparison circuit from a plurality of types of corresponding degree of matching data calculated between each of a plurality of types of line image data serving as candidates of the first line image data and the second line image data; And a corresponding second line image data candidate having the greatest degree of agreement with the line image data. The method according to any one of claims 1 to 5, The first line image data is initially stored in a predetermined write data register, and after the line image data that is a candidate for the second line image data is selected and determined, the first line stored in the write data register. And the image data is replaced with the second line image data. A plasma display portion having a scan line portion and a data line portion, scan driver means for selecting a plurality of scan lines constituting the scan line portion, scan controller means for controlling the scan driver means, a plurality of data lines constituting the data line portion A plasma display device comprising a register section for recording line image data having bit sections connected to each, and image data buffer means for latching line image data for one frame, wherein the plasma display section is currently writing to a predetermined first line. With respect to the first line image data, the second line image data for recording another line image data constituting a plurality of different lines different from the first line on the plasma display after the first line image data. Article stored as a candidate And a two-line image data candidate storage register. The method of claim 7, wherein And at least two types of second line image data candidate storage registers are provided. The method of claim 8, In the first register section of the second line image data candidate storage register, the nth second line image data candidate extracted as the plurality of second line image data is stored, and in the second register section, And the m-th second line image data candidate extracted as the plurality of second line image data is stored. The method according to any one of claims 7 to 9, A corresponding first degree from the matching degree calculating means for calculating a matching degree between each of the extracted plurality of line image data candidates and the first line image data, and the matching degree information calculated by the matching degree calculating means; Comparison operation means for selecting another line image data having the greatest degree of agreement with the line image data as second line image data to be recorded on the plasma display after the first line image data is provided. Plasma display device. The method of claim 10, The matching degree calculating means is configured to compare all data bits constituting the first line image data with all data bits corresponding to each other of the respective line image data extracted as candidates of the second line image data. Plasma display device characterized in that. The method of claim 11, The correspondence degree calculating means is configured to perform the first bit image data of the first bit image data among the plurality of bits constituting the nth line image data among the plurality of types of line image data which are candidates for the second line image data. Exclusive-OR circuits for comparing the bits corresponding to each other and an adder circuit for adding the operation values of the bits of the exclusive-OR circuit are provided. A plasma display device, configured to calculate the degree of agreement of image data. The method of claim 12, The total number comparison circuit is provided, and the said total number comparison circuit calculates the several types of correspondence computed between each of the several types of line image data which are the candidate of the said 1st line image data and the said 2nd line image data. And a corresponding second line image data candidate having the largest match with the first line image data from the matching degree data. The method according to any one of claims 7 to 13, In the recording data register, the first line image data is initially stored, and after the line image data that is a candidate for the second line image data is selected and determined, the first line image stored in the recording data register. And the data is configured to be replaced with the second line image data.