KR100213275B1 - Horizontal line scanning method in the plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal line scanning method of a PDP display device, and based on a timing pulse for scanning from a pulse generator based on Vsync separated through a synchronization separator, horizontal lines L ₁ and L _3. , L ₃ , ..., L _M-1 ) are scanned (S ₁ , S ₃ , S ₅ , ..., S _M-1 ), then the horizontal lines of the stormwater (L ₂ , L ₄ , L ₆ , ..., L _M ) is scanned and one subfield is sustained entirely through the sustain unit and the scan and sustain unit based on the timing pulse for sustaining from the pulse generator, thereby storing the image data stored in the memory. Does not have to be converted into a sequential scanning method through the data processing unit, thereby wasting memory and improving the data processing speed of the data processing unit.

Description

METHOD FOR SCANING THE HORIZONTAL LINE IN PLASMA DISPLAY PANEL

1 is a block diagram of a PD display device suitable for applying the data addressing method of the PDP display device according to the present invention.

FIG. 2 is a data addressing timing diagram of one subfield for explaining a process of addressing odd field data and even field data on a per-throw line basis in a PDP display according to a preferred embodiment of the present invention.

FIG. 3 is a subfield shown to explain a process of sequentially scanning, addressing, and sustaining each horizontal line when addressing odd field data and even field data on a PDP panel according to another embodiment of the present invention. Data addressing timing diagram.

4 is a diagram illustrating data processing of a subfield shown in order to explain a process of scanning and addressing a sequential scan mode image on a PDP panel by a horizontal line unit and sustaining an entire subfield simultaneously according to a conventional method. Timing diagram.

* Explanation of symbols for main parts of the drawings

110: ADC 120: memory

130: data processing unit 135: synchronous separation unit

140: pulse generator 150: sustain unit

160: scan and sustain unit 170: addressing unit

180: PDP panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PDP display device, and more particularly to a PDP suitable for addressing a sub-field of an interlaced mode image on a PDP panel. A data addressing method of a display device.

Here, the scan (SCAN) means that the unit cell to emit light is selected from the unit cells on each horizontal line of the PDP display device, and then light is generated by applying wall charges to the selected unit cell.

Among various display devices that are applied to various fields, cathode ray tubes (hereinafter abbreviated as CRTs), which have a clear display, colorization, simple operation, and low manufacturing cost, are used in many fields. Since the CRT itself has a structure of a FRASCO type, the CRT is large in size, requires a high operating voltage of approximately 10,000V, and has a big disadvantage of display distortion.

Therefore, there is a strong demand for the emergence of a display device that can replace the above CRT, and research on a so-called flat display device having a large display area and a small volume has been continuously conducted in many fields related thereto.

On the other hand, the flat display device as described above includes active elements such as ELECTRO LUMINESCENCE, LIGHT EMITTING DIODE, PDP, LIQUID CRYSTAL DISPLAY, ELECTRO CHROMIC, etc. DISPLAY) and the like, and the present invention relates to a display device using a PDP which is substantially one of the active elements.

For reference, the advantages of the above-described PDP display device include a memory function that continues discharge when the input pulse is input once, and the display point is defined by the matrix structure, so that there is no distortion of the image and the emission frequency is 50-100 kHz. Because it is high, there is no flicker. In addition, since the PDP has a planar structure, it is advantageous for miniaturization, and since the material that reduces digestion by discharge is used on the surface of the dielectric layer in contact with the discharge, the life is long, and since the panel structure is mainly composed of the glass plate, the semi-fixed information is projected as a slide. It is possible to superimpose on a slide, which is advantageous for simplicity.

FIG. 4 is a diagram illustrating a process of scanning and addressing a progressive scan mode image on a PDP panel by one horizontal line unit in accordance with a conventional method and sustaining an entire subfield simultaneously. Data addressing timing diagram.

Referring to FIG. 4, I ₁ , I ₂ , I ₃ ,..., _M denote front emission and front emission of unit cells existing in the previous horizontal line in order to match the emission state of each unit cell between horizontal lines. S ₁ , S ₂ , S ₃ , ..., S _M represent the intervals for scanning (line selection and data addressing) each horizontal line, and T represents all units in one subfield. Indicates the interval for sustaining the cell.

As can be seen in FIG. 4, after performing I ₁ on one subfield, scanning the first horizontal line L ₁ (S ₁ ), performing I ₂ , and then performing the second horizontal line ( L ₂ ) scans (S ₂ ) and then completes the scan to the last horizontal line (L _M ) by performing the I ₃ and then scanning the third horizontal line (L ₃ ) (S ₃ ) Complete the addressing of the data.

Then, when the last horizontal line L _M is scanned, full sustain is performed for a predetermined sustain period for one subfield image data addressed on the PDP panel.

That is, the conventional PDP display adopts a method of supporting an image display for a sequential scan mode image in which each subfield data is sequentially scanned by one horizontal line and written to each horizontal line of the PDP panel.

On the other hand, in the NTSC broadcast mode, it has an interlaced scan mode image, not a sequential scan mode image, that is, an image mode that is divided into a radix field and an even field to form one frame.

Therefore, in the conventional PDP display device that supports only the progressive scan mode image, when the interlaced scan mode image (odd field and even field) in analog form is received, the odd field signal and the even field signal are respectively N bits (eg, After converting the digital data of each 8-bit RGB data into a sequential scan mode image using a frame memory, the image data converted into the sequential scan mode is converted into N subfield data. It is reconstructed and provided on the PDP panel.

As a result, when the interlaced scan mode image is displayed on the PDP panel according to the conventional method in the PDP display apparatus, the interlaced scan mode image must be converted into a sequential scan mode image, resulting in a waste of memory. However, there is a problem that a delay in data processing speed due to such image change is inevitably accompanied. That is, the conventional method requires at least two frame memories in consideration of alternate writing, reading and reconstruction into subfields in units of frames.

Accordingly, the present invention is to solve the problems of the prior art as described above, by reconstructing each of the odd and even field of the interlaced mode image received by the PDP display device into sub-fields on the PDP panel in interlaced mode It is an object of the present invention to provide a data addressing method of a PDP display device which can be addressed to.

In order to achieve the above object, the present invention provides a method for addressing data in a PDP display apparatus for reconstructing an interlaced scan mode video signal corresponding to a screen mode of P × Q size into N subfields and displaying them on a PDP panel. Based on the timing pulse for the line scan, by sequentially addressing each of the line data in the subfield corresponding to the odd field in the interlaced scan mode video signal to the corresponding odd-numbered horizontal line, the odd field corresponding subfield data is respectively stored. Writing in an odd horizontal line; The even field by sequentially addressing each line data in the subfield corresponding to the even field to the corresponding even-numbered horizontal line based on a timing pulse for the line scan synchronized with the end of writing of the odd field corresponding subfield data. A second step of writing corresponding subfield data into the even-numbered horizontal lines; And a third step of simultaneously sustaining the entire odd-numbered and even-numbered horizontal lines based on timing pulses for sustaining in synchronization with the end of writing of the even field corresponding subfield data. do.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a PD display device suitable for applying a data addressing method of a PDP display device according to the present invention. The ADC (ANALOG TO DIGITAL CONVERTER; hereinafter abbreviated as ADC 110), a memory 120, and a data processor 130, a sync separator 135, a pulse generator 140, a sustain unit 150, a scan and sustain unit 160, an addressing unit 170, and a PDP panel 180.

Referring to FIG. 1, the ADC 110 converts an analog image signal (eg, an interlaced scan NTSC image signal) into digital image data, that is, converts an RGB signal into N-bit digital data, respectively, and stores the memory ( 120) respectively.

In addition, the data processing unit 130 extracts interlaced digital image data (odd field data and even field data) stored in the memory 120, and converts the digital image data into a sequential scan type digital image data. Reconstruct each of the N subfields, for example, the odd field and the even field, into eight subfields each consisting of image data having equal weights (WEIGHT). Each subfield image data of the even field is provided to the addressing unit 170.

Here, by adopting the data addressing method according to the present invention, the data processing unit 130 uses the interlaced scan mode video data (odd field and even field video data) as in the conventional method, to sequentially scan video data. No need to convert Therefore, the data processor 130 does not need to include a memory for converting the interlaced scan mode image into a progressive scan mode image, and does not have to take the delay in processing speed due to the image conversion.

Next, the sync separating unit 135 separates the horizontal sync signal (VERTICAL SYNC) (hereinafter, abbreviated as Vsync) inserted into the input video signal, and the separated horizontal sync signal is provided to the pulse generator 140. do.

Meanwhile, the pulse generator 140 includes a microprocessor that performs overall operation control of the PDP display apparatus. The pulse generator 140 includes a microprocessor for performing timing pulses and sustains for line scan using Vsync provided from the sync separator 135. A timing pulse and a timing pulse for addressing are respectively generated. In this case, the pulse generator 140 alternately provides a timing pulse for sustain to the sustain unit 150 and the scan and sustain unit 160.

Here, the sustain unit 150 applies a high voltage, for example 180V to 340V, to the sustain electrode of the PDP panel 180 based on the timing pulse for sustain provided from the pulse generator 140, and scans and The sustain unit 160 applies a high voltage to the scan and sustain electrodes of the PDP panel 180 based on the timing pulse for the scan provided from the pulse generator 140. In addition, the scan and sustain unit 160 applies a high voltage to the scan and sustain electrodes based on a timing pulse for sustain provided from the pulse generator 140.

At this time, in the sustain unit 150 and the scan and sustain unit 160, according to a preferred embodiment of the present invention, when all horizontal lines are sequentially scanned by scanning one horizontal line in a perverse skipping by one horizontal line That is, the subfield data of the odd field is sequentially scanned to odd horizontal lines, the even field subfield data is sequentially scanned to even horizontal lines, and all horizontal lines are scanned. A sustain pulse with is simultaneously provided to the scan in all horizontal lines and the sustain electrode.

Therefore, according to the data addressing method according to the preferred embodiment of the present invention, first, the subfield data of the odd field is scanned by every horizontal line, and the sequential data is written in the odd horizontal lines, and in the same manner, The subfield data is sequentially written on even-numbered horizontal lines, and in synchronization with this, the sustain field is performed on the subfields of the odd and even fields, so that the display of the subfields of the odd and even fields is performed.

Further, in the sustain unit 150 and the scan and sustain unit 160, according to another embodiment of the present invention, one horizontal line of the perforation unit (the odd horizontal line in the odd field and the even horizontal line in the even field) Each time a horizontal line is scanned (i.e., wall charge generation and data addressing), a sustain pulse is generated to maintain the discharge of the selected unit cell in the scanned horizontal line. The scan and sustain electrodes (not shown) are provided.

Accordingly, according to the line scanning method according to another embodiment of the present invention, all horizontal lines are sequentially scanned, addressed and sustained in one horizontal line unit (ie, radix field horizontal line and even field horizontal line). By being driven, display for one subfield is executed.

Here, the timing pulse for the scan and the timing pulse for the sustain generated in the sustain unit 150 and the scan and sustain unit 160 and provided to the sustain electrode, the scan and the sustain electrode, which are not shown, are scanned according to a conventional method. This can be generated by simple modification of the timing pulse used at the time. Therefore, such a simple timing pulse change is easily understood by those skilled in the art, and thus detailed illustration and description thereof are omitted herein.

The addressing unit 170 includes a plurality of data drivers each having a plurality of output pins, and is provided from the data processing unit 130 based on timing pulses for addressing provided from the pulse generator 140. The reconstructed subfield image data (i.e., each subfield data of the odd field and the even field) are addressed horizontally in the PDP panel 180 by one line, and the subfield line data of the odd field is sequentially horizontal to the odd horizontal line. The odd field line data is addressed to write, and the even field line data is written by sequentially addressing the subfield line data of the even field to the even horizontal line.

Next, a process of addressing data on each horizontal line according to the present invention using the PDP display device having the above-described configuration will be described.

FIG. 2 is a data addressing timing diagram of one subfield shown to explain a process of addressing odd field data and even field data on a per-throw line basis in a PDP display device according to a preferred embodiment of the present invention. A process of scanning a line according to a preferred embodiment will now be described with reference primarily to FIGS. 2 and 2.

First, an analog video signal, that is, an interlaced video signal, is converted into digital image data (ie, odd-numbered field and even-field image data) of each N bits of RGB through the ADC 110 and stored in the memory 120. The radix field and even field image data are respectively reconstructed into N subfield data through the data processor 130, and the respective subfield data corresponding to the radix field and the even field which are thus reconstructed are provided to the addressing unit 170. In this case, the vertical synchronization signal Vsync is separated from the input analog image signal through the synchronization separator 135, and the vertical synchronization signal Vsync thus separated is provided to the pulse generator 140.

Accordingly, in the pulse generator 140, timing pulses for scan, sustain, and addressing are generated based on the separated vertical synchronization signal Vsync, and the timing pulses generated in the pulse generator 140 are scanned and sustained. , The sustain unit 150 and the addressing unit 170 are respectively provided. In detail, the timing pulse for the scan generated from the pulse generator 140 is provided to the scan and sustain unit 160, and the timing pulse for the sustain generated from the pulse generator 140 is sustained with the sustain unit 150. Alternately provided to the scan and sustain unit 160, timing pulses for addressing generated from the pulse generator 140 are provided to the addressing unit 170.

Referring to FIG. 2, when one subfield data corresponding to the odd field is provided, the scan and sustain unit 160 sequentially scans the odd horizontal lines, that is, L ₁ , L ₃ , L ₅ , --- The scan lines are selected in the order of -L _M-1 , and the odd-numbered horizontal lines L ₁ , L ₃ , L ₅ , ---- L _M in accordance with data addressing from the addressing unit 170 synchronized with the selection of each line. _Since each line data is written sequentially at _-1 , the scan for one subfield data corresponding to the odd field is completed.

In addition, the scan and sustain unit 160 sequentially scans the even-numbered horizontal lines, that is, L ₂ , L ₄ , L ₆ ,-in synchronization with the end of the scan for one subfield data corresponding to the odd field. to select the scanning line in the order of _M --L, the even-numbered horizontal lines according to the data from the addressed addressable unit 170 is synchronized with the line select L _2, and _{L 4, L 6, ---- L} M As each line data is written sequentially, the scan for one subfield data corresponding to the even field is completed.

Then, in synchronization with the end of the scan for each one subfield data corresponding to the odd field and the even field, respectively, the sustain unit 150 and the scan and sustain unit 160 all horizontal lines (odd and even numbers). Sustain is performed simultaneously on the horizontal lines).

In the second FIG, I ₁ to I _N denotes a section in which the top emission and a full erase the unit cells existing on a horizontal line of the previous sub-field in order to match the light emission state of each of the unit cells in the horizontal line, S ₁ to S _N represents a section for scanning each horizontal line (ie, line selection and data addressing), and T represents a section for sustaining all selected unit cells existing in one subfield of the odd and even fields.

That is, in the preferred embodiment of the present invention, the odd field corresponding subfield data is sequentially addressed to odd horizontal lines and the even field correspondence subfield data is sequentially addressed to even horizontal lines. Next, by sustaining the entire horizontal line, it is possible to address each line in the PDP panel in interlaced scanning mode without converting the interlaced scan mode image into a progressive scan mode image.

Therefore, according to this embodiment of scanning the interlaced scan mode image with the PDP panel as it is, it is not necessary to include a memory required for converting the interlaced scan mode image into a sequential scan mode image as in the conventional method. Waste can be suppressed, and the problem of delay in processing speed that occurs when converting interlaced images into progressive scan images can be prevented at the source.

FIG. 3 is a subfield shown to explain a process of sequentially scanning, addressing, and sustaining each horizontal line when addressing odd field data and even field data on a PDP panel according to another embodiment of the present invention. Is a data addressing timing diagram.

Referring to FIG. 3, when the interlaced scan mode image is input, the present embodiment sequentially addresses the odd field-corresponding subfield data to odd-numbered horizontal lines, and then evens the even-field-corresponding subfield data into even-numbered horizontal lines. From the point of view of sequential addressing in lines, it can be regarded as substantially the same as the above-described preferred embodiment, but as in the above-described preferred embodiment, both the radix field and the even field corresponding subfield are stanned (addressed) It is different from the above-mentioned preferred embodiment in that scan and sustain are simultaneously performed one horizontal line for each horizontal line in the odd field and the even field without sustaining the horizontal lines at the same time.

That is, in this embodiment, unlike the above-described preferred embodiment in which all horizontal lines (i.e., odd and even horizontal lines) are all scanned and then sustain the entire horizontal lines simultaneously, as shown in FIG. 3 as an example. As shown, a scan S ₁ and sustain T ₁ are performed on horizontal line L ₁ when the radix field corresponding subfield is provided, followed by a scan on horizontal line L ₃ , S ₃ ) and sustain (T ₃ ) in order to scan sequentially (S _N-1 ) and sustain (T _N-1 ) to the last horizontal line (L _M-1 ) of the odd numbered odd field corresponding subfield Complete the scan and sustain for, and perform the scan and sustain on the subfields corresponding to the even field in the same manner.

Therefore, in this embodiment, the interlaced mode image can be addressed to the PDP panel by sequentially scanning the subfield data corresponding to the odd field and the even field, respectively, thereby obtaining substantially the same results as in the above-described preferred embodiment. have.

In addition, since the present embodiment simultaneously scans and sustains one horizontal line for each horizontal line in the radix field and the even field, all horizontal lines are simultaneously scanned after scanning an image in sequential scanning mode as in the conventional method. Luminance difference between horizontal lines that can be caused when sustaining, that is, long scan time, can effectively prevent the luminance difference between horizontal lines from falling or disappearing due to wall charge applied to the selected unit cell in the front horizontal line. That has another effect.

As described above, according to the present invention, the interlaced scanning method, i.e., radix field data, is sequentially scanned on the odd-numbered horizontal lines of the PDP panel without conversion of the interlaced mode image into the progressive scan mode image, and then the even field Since the data is addressed on all horizontal lines in such a manner as to sequentially scan the data evenly on even-numbered horizontal lines of the PDP panel, the memory required for converting the interlaced mode image into the sequential scan mode image as in the conventional method. Since it is not necessary to provide such a device, unnecessary waste of memory can be suppressed, and a problem of delay in processing speed that occurs when converting an interlaced scan image into a progressive scan image can be effectively prevented.

Claims (1)

A method of addressing data in a PDP display device in which an interlaced scan mode video signal corresponding to a P × Q size screen mode is reconstructed into N subfields and displayed on a PDP panel, wherein the data is addressed based on a timing pulse for line scan. A first process of writing the odd-field corresponding subfield data to each odd-numbered horizontal line by sequentially addressing each of the line data in the subfield corresponding to the odd-numbered field in the interlaced scan mode video signal. ; The even field by sequentially addressing each line data in the subfield corresponding to the even field to the corresponding even-numbered horizontal line based on a timing pulse for the line scan synchronized with the end of writing of the odd field corresponding subfield data. A second step of writing corresponding subfield data into the even-numbered horizontal lines; And a third step of simultaneously sustaining the entire odd-numbered and even-numbered horizontal lines on the basis of a timing pulse for sustain synchronized with the end of writing of the even-field-specific subfield data.