KR101010165B1 - Method for driving deinterlace of driving liquid crystal display panel - Google Patents

Abstract

The present invention relates to a method of driving a deinterlace of a liquid crystal display, and the present invention relates to a data voltage difference between adjacent upper and lower lines of each of a plurality of odd line fields and even line fields provided to form a plurality of progressive frames. Comparing a full white voltage and a full black voltage difference used in driving the liquid crystal display; And copying the lower side of the compared upper / lower line data voltage when the data voltage difference between the upper / lower lines becomes at least 2/3 of the difference between the full white voltage and the full black voltage. Fill the data of the empty lines of the progressive frame, or compare the top if the data voltage difference between these top / bottom lines is less than at least 2/3 of the difference between the full white voltage and the full black voltage And calculating the average value between the lower line data voltages and filling the average value with the empty line data of the progressive frame, wherein the DC related afterimage generated when the deinterlace drive is performed without using an IP chip. And it is possible to solve the black / white unclear boundary problem.

Deinterlaced, Progressive Frame, Interlaced Field, Odd Field, Even Field

Description

Deinterlacing driving method of liquid crystal display {METHOD FOR DRIVING DEINTERLACE OF DRIVING LIQUID CRYSTAL DISPLAY PANEL}

1 is a first embodiment of a deinterlace driving method used to form a progressive frame P from interlaced field I data in a deinterlacing driving method of a liquid crystal display according to the prior art. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. Exemplary diagram showing a case of configuration.

FIG. 2 is a second embodiment of a deinterlace driving method used to form a progressive frame P from interlaced field I data in a deinterlacing driving method of a liquid crystal display according to the related art. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. Exemplary diagram showing a case of configuration.

FIG. 3 is a first embodiment of a deinterlace driving method used to construct a progressive frame P from interlace field I data in the deinterlace driving method of the liquid crystal display according to the present invention. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. Exemplary diagram showing an example of configuration.

4 is a second embodiment of a deinterlace driving method used to construct a progressive frame P from interlaced field I data in the deinterlacing driving method of a liquid crystal display according to the present invention. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. Exemplary diagram showing an example of configuration.

*** Explanation of symbols for main parts of drawing ***

L1, L3, L5, L7, L9, L11, L13: Odd Field Line

L2, L4, L6, L8, L10, L12, L14: Even field line

L'1, L'3, L'5, L'7, L'9, L'11, L'13: Insert odd line

L'2, L'4, L'6, L'8, L'10, L'12, L'14: Even Even Line

L'1/3, L'3/5, L'5/7, L'7/9, L'9/11, L'11/13: Average data line

L'2/4, L'4/6, L'6/8, L'8/10, L'10/12, L'12/14: Average data line

I: interface field P: progressive frame

The present invention relates to a method of driving a liquid crystal display device, and more particularly, to solve DC-related afterimages and black / white unclear boundary problems generated when deinterlace driving is performed without using an IP chip. The deinterlace driving method of the liquid crystal display device.

Digital television is currently being developed based on the MPEG-2 standard, and the interlace scan (interlace) used in analog television systems to facilitate the transition from conventional analog television to digital television. Scan) method.

In addition, progressive television monitors, liquid crystal displays (LCDs), or personal computers currently available for digital television display interlaced digital images or current analog television signals rather than progressive digital images. Mainly used to This is a problem arising from the transition from analog television to digital television, and interlaced scans will be used for at least the next few years.

In the deinterlace driving method using the above-mentioned general interlace scan, one field scans an odd line, and two fields scan an even line.

In addition, a deinterlacing driving method using a general sequential scanning (progressive scan) is a method of scanning both odd lines and even lines on one screen.                         

From this point of view, the following two methods are used for the deinterlace driving method used to construct a frame from existing field data.

FIG. 3 is a first embodiment of a deinterlace driving method used to construct a frame from field data in the deinterlace driving method of a liquid crystal display according to the present invention, wherein (a) is an odd field line. line is an exemplary view showing a case of configuring a progressive frame (Pregressive Frame), (b) is an illustration showing an example of configuring a progressive frame from an even field line (even field line). to be.

1 is a first embodiment of a deinterlace driving method used to form a progressive frame P from interlaced field I data in a deinterlacing driving method of a liquid crystal display according to the prior art. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. It is an exemplary figure which shows the case where it comprises.

FIG. 2 is a second embodiment of a deinterlace driving method used to form a progressive frame P from interlaced field I data in a deinterlacing driving method of a liquid crystal display according to the related art. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. It is an exemplary figure which shows the case where it comprises.

According to a first embodiment of the conventional deinterlace driving method, as shown in FIG. 1 (a), an odd field I consisting of odd lines l1, l3, l5, l7, l9, l11, l13,... L'1, l'3, l'5, l'7 between the odd lines l1, l3, l5, l7, l9, l11, l13, ...... l1, l'1, l3, l'3, l5, l'5, l7, l'7, l9 It forms a progressive frame of odd fields consisting of l'9, l11, l'11, l13, l'13 ...

That is, in the case of an odd line, as shown in FIG. 1 (a), when one progressive signal is copied to form a progressive frame, data about an empty line is directly connected to an upper line, for example, an upper line l1. Copy and use the upper line (l1) of the lower line (l3).

In addition, in the case of the even line as described above, an even field including even lines l2, l4, l6, l8, l10, l12, l14,... l'2, l'4, l'6, l 'between the even lines l2, l4, l6, l8, l10, l12, l14,. 8, l'10, l'12, l'14, ... by copying the video signals l2, l'2, l4, l'4, l6, l'6, l8, l'8, A progressive field of even fields consisting of l10, l'10, l12, l'12, l14, l'14 ... is formed.

That is, in the case of an even line, as shown in FIG. 1 (b), when one progressive signal is copied to form a progressive frame, data for an empty line is directly placed on an upper line, for example, an upper line l2. Copy and use the upper line (l2) of and the lower line (l4).

On the other hand, the second embodiment of the conventional deinterlace driving method, as shown in Fig. 2 (a), the odd field consisting of the odd lines l1, l3, l5, l7, l9, l11, l13, ... Determining the average value between the lines located at the top and bottom between the odd lines l1, l3, l5, l7, l9, l11, l13, ... by using the video signal composed of the (odd field) This means that the video signals of l'1/3, l'3/5, l'5/7, l'7/9, l'9/11, l'11/13, ... Copy l1, l'1/3, l3, l'3/5, l5, l'5/7, l7, l'7/9, l9, l'9/11, l11, l'11/13 It forms a progressive frame of odd fields consisting of, l13, .....

That is, in the case of odd lines, as shown in FIG. 2 (a), when one progressive signal is copied to form a progressive frame, the data values of the upper line and the lower line immediately adjacent to the data for the empty line are used. This is determined by averaging. For example, the data value obtained by dividing the sum of the data values of the upper line l1 and the lower line l3 by two, that is, l1 / 3, is determined as the data value of the empty line.

On the other hand, the second embodiment of the conventional deinterlace driving method, as shown in Fig. 2 (b), an even field consisting of the odd lines l2, l4, l6, l8, l10, l12, l14, ... Determining the average value between the lines located at the top and bottom between the even lines l2, l4, l6, l8, l10, l12, l14, ...... by using the image signal composed of the even field This means that the video signal of l'2/4, l'4/6, l'6/8, l'8/10, l'10/12, l'12/14, ... By copying l2, l'2/4, l4, l'4/6, l6, l'6/8, l8, l'8/10, l10, l'10/12, l12, l'12/14 A progressive frame of odd fields consisting of, l14, .....

That is, as in the above, in the even line, as shown in FIG. 2 (b), when the progressive frame is copied by copying one insufficient signal, the upper line and the lower line immediately adjacent to the data for the empty line are formed. The average of the data values is determined. For example, a data value obtained by dividing the sum of the data values of the upper line l2 and the lower line l4 by two, i.e., l1 / 3, is determined as the data value of the empty line.

However, according to the first embodiment of the deinterlacing driving method of the video signal according to the prior art, since the data of the upper line is simply copied by using the data of the upper line, the same line is regularly repeated, so that the resolution Will lead to degradation.

In addition, according to the second embodiment of the present invention, data of an empty line is averaged with data values of immediately adjacent upper and lower lines. In this case, a horizontal afterimage called an interlace afterimage occurs. If the pattern coming out of the driving screen is a black and white contrast pattern (chess pattern), cinema pattern (cinema pattern) takes the average value of the upper and lower lines, the boundary becomes unclear between them .

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, the object of the present invention is to provide a DC-related afterimage that occurs when the deinterlace driving without using an IP (Interlace to Progressive) chip and The present invention provides a deinterlacing driving method of a liquid crystal display device that can solve an unclear boundary problem of black and white.

The deinterlacing driving method of the liquid crystal display device for achieving the object of the present invention comprises the steps of providing an interlace field consisting of a plurality of odd line field and a plurality of even line field to form a plurality of progressive frames; The data voltage difference between adjacent top / bottom lines of each of the plurality of odd line fields and even line fields and the full white voltage and the full black voltage difference used in driving the liquid crystal display are compared with each other. Doing; And copying the lower side of the compared upper / lower line data voltage when the data voltage difference between the upper / lower lines becomes at least 2/3 of the difference between the full white voltage and the full black voltage. Fill the data of the empty lines of the progressive frame, or compare the top if the data voltage difference between these top / bottom lines is less than at least 2/3 of the difference between the full white voltage and the full black voltage And calculating the average value between the lower line data voltages and filling the average value with the empty line data of the progressive frame.

Hereinafter, a deinterlace driving method of a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.                     

FIG. 3 is a first embodiment of a deinterlace driving method used to construct a progressive frame P from interlace field I data in the deinterlace driving method of the liquid crystal display according to the present invention. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. It is an exemplary figure which shows the example which comprises.

The first embodiment of the deinterlace driving method according to the present invention, unlike the deinterlace driving method used to construct a frame from the existing field data, the data voltage of the adjacent upper and lower lines to fill the data of the empty line If the difference is more than 2/3 of the difference between the full white voltage and the full black voltage used in the IPS (In-Plane Switching mode) operation of the liquid crystal display, Copy the lower side of the voltage as it is to fill the empty line data.

This will be described with reference to FIG. 3 (a) using an image signal composed of odd fields consisting of odd lines L1, L3, L5, L7, L9, L11, L13,... L'1, L'3, L'5, L'7, L'9, L'11 between the odd lines L1, L3, L5, L7, L9, L11, L13, ... L1, L'1, L3, L'3, L5, L'5, L7, L'7, L9, L'9, L11, L It forms a progressive frame of odd fields consisting of '11, L13, L'13 ... '.

That is, in the case of the odd lines, as shown in FIG. 3 (a), the data voltage difference between adjacent upper / lower lines, for example, L1 and L3, is filled to fill the data of the empty lines. (In-Plane Switching mode) If the difference between the full white voltage and the full black voltage difference used in driving is greater than 2/3, the lower side of the compared top / bottom line data (i.e. Assuming that the data voltage of the L3 line is lower than the data voltage of the L1 line), the L3 line is copied as it is to fill the empty line data.

In the same manner as described above, in the case of an even field, the even field including even lines L2, L4, L6, L8, L10, L12, L14, ... will be described with reference to FIG. L'4, L'6, L'8, between even-numbered lines L2, L4, L6, L8 L10, L12, L14, ... by using an image signal composed of fields L'10, L'12, L'14, L ..., L'4, L4, L'6, L6, L'8, L8, L'10, L10, It forms a progressive frame of even fields consisting of L'12, L12, L'14, L14, .....

That is, in the case of even-numbered lines, as shown in FIG. 3 (b), the data voltage difference between adjacent upper / lower lines, for example, L2 and L4, to fill the empty line data is changed to IPS ( If the difference between the full white voltage and the full black voltage difference used in In-Plane Switching mode is greater than 2/3, the lower side of the voltage of the upper / lower line data compared (ie, L4 line). Assuming that the data voltage of is lower than the data voltage of the L2 line), the L4 line is copied as is to fill the empty line data.                     

A second embodiment of a deinterlace driving method of a liquid crystal display according to the present invention will be described with reference to FIG. 4 as follows.

4 is a second embodiment of a deinterlace driving method used to construct a progressive frame P from interlaced field I data in the deinterlacing driving method of a liquid crystal display according to the present invention. ) Is an exemplary diagram showing a case of forming a progressive frame from an odd field line, and (b) shows a progressive frame from an even field line. It is an exemplary figure which shows the example which comprises.

The second embodiment of the deinterlace driving method of the liquid crystal display according to the present invention is different from the deinterlace driving method used to construct a frame from the existing field data. If the data voltage difference of the line is less than 2/3 of the difference between the full white voltage and the full black voltage used in the in-plane switching mode (IPS) operation of the liquid crystal display, The average value between the voltages of the line data is determined and this value is filled with the data of the empty line.

This will be described with reference to FIG. 4 (a) using an image signal composed of odd fields consisting of odd lines L1, L3, L5, L7, L9, L11, L13,... L'1/3, L'3/5, L'5/7, L'7/9 between the odd lines L1, L3, L5, L7, L9, L11, L13, ... L1, L'1/3, L3, L'3/5, L5, L'5/7, L7 by copying the video signals of L'9/11, L'11/13, ... A progressive field of an odd field consisting of L'7/9, L9, L'9/11, L11, L'11/13, L13, ..... is formed.

That is, in the case of the odd lines, as shown in FIG. 4 (a), the data voltage difference between adjacent upper / lower lines, for example, L1 and L3, to fill the data of the empty line is changed to IPS ( If less than 2/3 of the difference between the full white voltage and the full black voltage used in In-Plane Switching mode, the average value of the compared upper / lower line data voltages is obtained. The data voltage of the L3 line and the data voltage of the L1 line divided by 2) are copied as is and the data of the empty line is filled.

Similarly, even in the case of the even field, the even field consisting of the even lines L2, L4, L6, L8, L10, L12, L14, ... will be described with reference to FIG. L'2/4, L'4/6, between the even lines L2, L4, L6, L8, L10, L12, L14, ... by using an image signal composed of (Even field). Copy the video signals of L'6/8, L'8/10, L'10/12, L'12/14, ... to L2, L'2/4, L4, L'4 / Even-field progressive frame consisting of 6, L6, L'6/8, L8, L'8/10, L10, L'10/12, L12, L'12/14, L14, ..... progressive frame).

That is, in the case of even-numbered lines, as shown in FIG. 4 (b), the data voltage difference between adjacent upper / lower lines, for example, L2 and L4, in order to fill the data of the empty lines is changed to IPS ( If less than 2/3 of the difference between the full white voltage and the full black voltage used in In-Plane Switching mode, the average value of the compared upper / lower line data voltages is obtained. The data of the empty line is filled by copying the L'2/4 line, which is the data voltage of the L4 line and the data voltage of the L2 line, divided by two.

As described above, according to the deinterlacing driving method of the liquid crystal display according to the present invention, unlike the deinterlacing driving method used to construct a frame from the existing field data, it is adjacent to fill the data of the empty line. When the data voltage difference of the top / bottom line is more than 2/3 of the difference between the full white voltage and the flat black voltage used in driving the LCD module in IPS mode, the lower side of the compared top / bottom line data voltage is kept as it is. Fill the empty data by copying, or if the difference of the compared line data voltage is less than 2/3, the average value is calculated between them and the empty line data is filled.

Therefore, this reduces residual DC, which may cause afterimages, and has the effect of improving afterimages. Also, if the pattern coming out of the driving screen is a black and white contrast pattern such as a chess pattern or a cinema pattern, the lower side is copied and The boundary can be clearly expressed by filling in the data of.

On the other hand, while described above with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below And can be changed.

Claims (2)

Providing an interlaced field comprising a plurality of odd line fields and a plurality of even line fields to construct a plurality of progressive frames; The data voltage difference between adjacent top / bottom lines of each of the plurality of odd line fields and even line fields and the full white voltage and the full black voltage difference used in driving the liquid crystal display are compared with each other. Doing; And When the data voltage difference between these top / bottom lines is at least 2/3 of the difference between the full white voltage and the full black voltage, the lower side of the compared top / bottom line data voltages is copied and progressive. If the data on the empty lines of the frame is filled or if the data voltage difference between these top / bottom lines is less than at least 2/3 of the difference between the full white voltage and the full black voltage, And calculating the average value between the lower line data voltages and filling the average value with the empty line data of the progressive frame. The liquid crystal display of claim 1, wherein when the interlaced field pattern is a chess pattern or a cinema pattern, data of a blank line is filled by copying a lower line voltage among upper and lower lines. A method for driving deinterlace of a device.

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