CN104658489B - A kind of driving method and its driving IC for LCD panel - Google Patents

Abstract

The object of the present invention is to provide a driving method for an LCD panel based on a 2n primary color sub-pixel structure and a driving IC thereof. Wherein, the sub-pixel array of the LCD panel is M*N and the LCD panel is based on a sub-pixel structure of 2n primary colors; the driving method utilizes a driver IC of an LCD panel based on a 3-primary color sub-pixel structure, and the driver IC's The number of signal source channels is at least N; in the row direction, the sub-pixels of an integer multiple of 2n are used as a unit, and for the sub-pixels of the same integer multiple of 2n consecutive units in every two consecutive units, 2 columns are used as a sub-pixel unit, and cross-connect the driver IC with the 2 signal source channels corresponding to each subunit to the 2 columns of subpixels in the corresponding subunit, so that the polarities of the subpixels of the same color in each row are complementary. Compared with the prior art, the driving method of the present invention makes the polarities of the sub-pixels of each color complementary in the row direction, so that there will be no shift of the common voltage to avoid color display deviation.

Description

A kind of driving method and its driving IC for LCD panel

technical field

The invention relates to the technical field of LCD panels, in particular to a driving technology for LCD panels.

Background technique

A traditional liquid crystal panel (LCD) adopts the specification that one pixel has three sub-pixels, and the three sub-pixels respectively display the three primary colors of red (R), green (G) and blue (B). The display of the three primary colors is achieved by coating the three sub-pixels with color-resist coatings of different colors. Generally speaking, the color-resist coating will absorb 2/3 of the white backlight, so that the overall transmittance of the liquid crystal module is not high. .

In response to this situation, a new 4-color sub-pixel specification has emerged, which can additionally display white (W) or other colors in addition to the three primary colors. If the sub-pixels are coated with transparent color resist, they can display white, and the brightness of the backlight is not lost, which improves the overall brightness and transmittance of the module. Therefore, in general, in order to obtain higher brightness, the 4-color sub-pixel will use the RGBW setting.

Based on the 4-color sub-pixel specification, a variety of color arrangement rules and corresponding driving methods that are different from conventional sub-pixel division methods have been derived. In this type of method, a pixel is no longer strictly divided into 4 (or 3 or other multiple) sub-pixels, but the number of divisions is reduced to a certain extent, and instead the image processing algorithm is combined with the panel structure, Ensure that the panel can still accept traditional RGB image signals and display images that are the same or close to the original image, even if it is not constructed in traditional RGB.

When the pixel matrix of the liquid crystal panel is applied with voltage, in order to protect the liquid crystal molecules, it can only be applied with AC voltage, which leads to the concept of pixel polarity. The polarity distribution is generally a bit flipped, row flipped, column flipped, frame flipped, etc. Each method has its own advantages and disadvantages and suitable applications. But the main purpose is to obtain good display effect, lower power consumption, and more convenient driving process.

For the LCD panel with 3-color sub-pixel structure, since it is arranged in RGB, and the polarity output of the driver IC is +-+-+-..., this makes the polarity of each single-color sub-pixel in the row direction always complementary .

However, for an LCD panel with a 4-color sub-pixel structure, the polarity distribution is much more complicated.

For example, for a liquid crystal panel with an RGBW four-color sub-pixel structure, its color distribution follows the RGWB

WBRG

periodic cycle. Wherein, the R sub-pixel and the G sub-pixel form a pixel, and the B sub-pixel and the W sub-pixel form a pixel. Due to its unique color arrangement, the usual pixel polarity arrangement modes such as dot flip and column flip tend to cause various display problems that do not appear on conventional RGB screens on this panel.

FIG. 1 shows a liquid crystal panel with a 4-color sub-pixel structure in the aforementioned color arrangement, and the polarity selection circuit of its driving IC is based on dot inversion. Here, for the sake of simplicity, only 4 groups of RGWB are shown

WBRG

periodic cycle.

With reference to FIG. 2 , FIG. 2 a shows a possible poor image display situation when the dots of the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 1 are reversed. When the full screen is red, there is voltage coupling between the circuit nodes on the panel. All R sub-pixels on the screen are turned on, and all other sub-pixels are turned off.

As shown in FIG. 2b, some sub-pixels in the odd-numbered rows such as the 1st row and the 3rd row are positively polarized and all turned on in the current frame, but there are no corresponding negatively polarized sub-pixels that are turned on at the same time. In this way, the voltage variation of the entire row of sub-pixels is shifted toward the positive polarity direction as a whole. Each sub-pixel electrode in the first row and the third row has a coupling capacitance with the common electrode, so that the voltage V _com on the common electrode is coupled toward the forward direction and deviates from the common potential. Since the turn-on degree of the sub-pixel depends on the potential difference between the sub-pixel electrode and the common electrode, when the common electrode voltage deviates from the common potential, the voltage between each sub-pixel and the common electrode deviates, resulting in the first row and the first row The sub-pixels that are fully on on row 3 have insufficient voltage, while the sub-pixels that are fully off have tiny voltages. In this way, the display colors of row 1 and row 3 deviate.

The situation of the even-numbered lines such as the 2nd line and the 4th line is also similar, except that the common voltage V _com deviates toward the negative direction as a whole, which eventually causes the display colors of the 2nd line and the 4th line to deviate.

To sum up, in the case of the pixel polarity distribution shown in Figure 1 and Figure 2a, the common voltage V _com appears to be coupled in the opposite direction to the odd row and the even row, resulting in deviations in the full-screen color. Also, this situation occurs when any of the RGB primary colors are displayed on the full screen, which is a very common display situation, so the pixel polarity distribution shown in Figure 1 and Figure 2a will damage the pixel polarity distribution using this arrangement. The usage of the terminal of the LCD panel.

FIG. 3 a shows another possible display defect of the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 1 when dot inversion occurs. When the full screen displays cyan (cyan, which is a 1:1 mixture of the primary colors G and B), the voltage coupling between the circuit nodes on the panel. All G and B sub-pixels on the screen are turned on, and all other sub-pixels are turned off.

As shown in FIG. 3b , some sub-pixels in odd-numbered rows such as row 1 and row 3 are negatively polarized and all turned on in the current frame, but there are no corresponding sub-pixels with positive polarity that are turned on at the same time. In this way, the voltage variation of the entire row of pixels is shifted toward the negative polarity direction as a whole. There is a coupling capacitance between each pixel electrode in the first row and the third row and the common electrode, so that the voltage V _com on the common electrode is coupled in a negative direction and deviates from the common potential.

The situation of the even-numbered lines such as the 2nd line and the 4th line is also similar, except that the common voltage V _com deviates towards the positive direction as a whole, which eventually causes the display colors of the 2nd line and the 4th line to deviate.

It can be seen that the example shown in Figure 3a and b is of the same type as the example shown in Figure 2a and b, but the degree of the example shown in Figure 3a and b is more serious, so that it will also damage the liquid crystal panel using this arrangement usage of the terminal.

Figure 4 shows the RGWB compliance

WBRG

For a liquid crystal panel with a 4-color sub-pixel structure in a color arrangement, the polarity selection circuit of the driver IC is based on column inversion. Likewise, for simplicity of description, Fig. 4 still only shows the periodic cycles of four groups of RGWBs.

FIG. 5 shows a possible poor image display situation when the columns of the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 4 are reversed. When red is displayed on the full screen, the corresponding relationship between color and polarity on the panel. All R sub-pixels on the screen are turned on, and all other sub-pixels are turned off. At this time, the polarities of all R pixels are positive, and obviously, at the moment of some other frames, the polarities of all R sub-pixels will be negative again. That is, at any moment of a specific frame, the polarities of all R sub-pixels are consistent.

It should be noted that although R sub-pixels are used for illustration here, those skilled in the art should understand that for sub-pixels of any color, there is a characteristic that the polarity is always consistent, and there is no polarity of the same color but reversed. to compensate for this polarity tendency. In this case, if the V _com voltage is not at the proper potential, the color of all positive polarity R subpixels will deviate from the color of all negative polarity R subpixels, that is, the overall color of the positive and negative frames different, causing flicker.

Contents of the invention

The object of the present invention is to provide a driving method for an LCD panel based on a 2n primary color sub-pixel structure and a driving IC thereof.

According to one aspect of the present invention, a driving method for an LCD panel is provided, wherein the sub-pixel array of the LCD panel is M*N and the LCD panel is based on a sub-pixel structure of 2n primary colors, and n is greater than or an integer equal to 2;

Wherein, the driving method utilizes a driving IC of an LCD panel based on a 3-primary color sub-pixel structure;

Wherein, the driving method includes:

- In the row direction, the sub-pixels of an integer multiple of 2n are used as a unit, and for the sub-pixels of the same integer multiple of 2n consecutive units in every two consecutive units, 2 columns are used as a sub-unit, and the drive IC The 2 signal source channels corresponding to each subunit are cross-connected to the 2 columns of subpixels in the corresponding subunit, so that the polarities of the subpixels of the same color in each row are complementary.

According to another aspect of the present invention, a driver IC for an LCD panel is also provided, wherein the sub-pixel array of the LCD panel is M*N and the LCD panel is based on a sub-pixel structure of 2n primary colors, n is an integer greater than or equal to 2;

Wherein, the driver IC is configured as:

- The number of signal source channels is N;

- In the row direction, the N signal source channels of the driver IC are sequentially connected to the sub-pixels in the corresponding columns, and 2n columns of sub-pixels are used as a unit, so that the polarities of the sub-pixels of the same color in two adjacent units are opposite.

Compared with the prior art, the present invention makes it possible to use any existing driver IC of an LCD panel based on a 3-primary-color sub-pixel structure to drive an LCD panel based on a 2n-primary-color sub-pixel structure and a sub-pixel array of M*N, As long as the number of signal source channels of the driver IC is at least N. Moreover, the driving method of the present invention enables the polarities of the sub-pixels of each color to be complementary in the row direction, so that there will be no offset of the common voltage to avoid color display deviation.

In addition, the present invention also provides a special driver IC to be applied to an LCD panel based on a sub-pixel structure of 2n primary colors. The sub-pixel array of the LCD panel is M*N, and the number of signal source channels of the driver IC is N. After each signal source channel of the driver IC is sequentially connected to the sub-pixels of the corresponding column, the output polarity of each signal source makes the polarity of the sub-pixels of the same color in each row complementary.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 shows a partial schematic diagram of a liquid crystal panel based on a dot inversion 4-color sub-pixel structure in the prior art;

FIG. 2a shows a schematic diagram of a possible poorly displayed image when the dots of the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 1 are reversed;

FIG. 2b shows a schematic diagram of the common voltage V _com of each row of sub-pixels in the case of poorly displayed images shown in FIG. 2a;

FIG. 3 a is a schematic diagram showing another possible poorly displayed image when the dots of the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 1 are reversed;

FIG. 3b shows a schematic diagram of the common voltage V _com of each row of sub-pixels in the case of poorly displayed images shown in FIG. 3a;

FIG. 4 shows a partial schematic diagram of another liquid crystal panel based on a column inversion 4-color sub-pixel structure in the prior art;

FIG. 5 shows a schematic diagram of a possible poorly displayed image when the column of the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 4 is reversed;

FIG. 6 shows a schematic diagram of a polarity distribution mode of a liquid crystal panel with a 4-color sub-pixel structure according to the present invention;

FIG. 7a shows a schematic diagram of the sub-pixel polarity distribution when the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 6 displays red in full screen;

Fig. 7b shows a schematic diagram of the common voltage V _com of each row of sub-pixels in the display case shown in Fig. 7a;

FIG. 8a shows a schematic diagram of the sub-pixel polarity distribution when the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 6 displays cyan in full screen;

Fig. 8b shows a schematic diagram of the common voltage V _com of each row of sub-pixels in the display case shown in Fig. 8a;

Fig. 9 shows an exemplary polarity selection connection schematic diagram according to the driving method of the present invention;

Fig. 10 shows another exemplary polarity selection connection schematic diagram according to the driving method of the present invention;

FIG. 11 shows a schematic diagram of a part of the connection between a driver IC and an LCD panel according to the present invention.

The same or similar reference numerals in the drawings represent the same or similar components.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The present invention is intended to be applied to an LCD panel based on a 2n primary color sub-pixel structure, where n is an integer greater than or equal to 2, that is, the present invention can be applied to an LCD panel based on an even number of primary colors, for example, to an LCD panel based on 4 primary colors , 6 primary colors... LCD panel with sub-pixel structure, its sub-pixel array is M*N. Each pixel is composed of an even number of sub-pixels less than or equal to 2n. For example, for an LCD panel with 4 primary colors, each pixel can be composed of 2 sub-pixels or 4 sub-pixels; for an LCD panel with 6 primary colors, each pixel can be composed of 2 sub-pixels, 4 sub-pixels or 6 sub-pixels; thus analogy.

For the convenience of description, the LCD panel based on the 4-primary color sub-pixel structure is used as an example in this paper. However, those skilled in the art should understand that this example is only for the purpose of explaining the present invention, and should not be regarded as a reference to the present invention. Any limitation of the present invention, and any other LCD panel based on the 2n primary color sub-pixel structure applicable to the present invention still falls within the patent protection scope of the present invention.

Further, for an LCD panel based on a 4-primary-color sub-pixel structure, the 4 primary colors may be any 4 colors, especially without loss of generality, the 4 primary colors are red, green, blue and any other color. In particular, the other arbitrary color is white.

Likewise, for ease of description, red, green, blue and white are used as four primary colors to illustrate the LCD panel based on the sub-pixel structure of four primary colors of the present invention. However, those skilled in the art should understand that this example is only for the purpose of explaining and illustrating the present invention, and should not be regarded as any limitation to the present invention. Any other 4 colors, such as they can be used to form sub-pixels based on 4 primary colors The LCD panel of the structure still belongs to the patent protection scope of the present invention.

Furthermore, for the convenience of explanation, the arrangement of red, green, blue and white in this paper is RGWB

WBRG

Let's take an example. In addition, the R sub-pixel and the G sub-pixel form a pixel, and the B sub-pixel and the W sub-pixel form a pixel. However, those skilled in the art should understand that this example is only for the purpose of explaining the present invention, and should not be regarded as any limitation to the present invention. Other 4-color arrangements and/or suitable pixel composition structures/ Quantity still belongs within the patent protection scope of the present invention.

In addition, since the driving method in the present invention can be performed by using any existing driver IC of an LCD panel based on a 3-primary color sub-pixel structure, as long as the number of signal source channels (source channels) of the driver IC is not less than N, and the The polarity selection circuit of the driver IC can be any polarity selection circuit other than the existing polarity selection circuit based on row inversion, such as a polarity selection circuit based on column inversion, a polarity selection circuit based on point inversion, or a polarity selection circuit based on Polarity selection circuit for frame inversion. Wherein, the polarity selection circuit based on point inversion may further include a polarity selection circuit based on single-point inversion and a polarity selection circuit based on multi-point inversion.

In an existing LCD panel with a 3-primary-color structure, the number of columns of sub-pixels and the number of signal source channels of its driving IC are consistent and correspond one-to-one.

Therefore, the number of signal source channels of the driver ICs of various existing 3-primary color LCD panels is as follows:

The number of signal source channels of the driver IC for FHD screen 1920*1080 (resolution) is 1080*3=3240;

HD screen 1280*720 (resolution) driver IC signal source channel number is 720*3=2160;

The number of signal source channels of the driver IC for QHD screen 960*540 (resolution) is 540*3=1620;

The number of signal source channels of the driver IC of the WVGA screen is 480*3=1440.

For example, when the resolution sub-pixel array of the LCD panel applied in the present invention is 960*1080, and the number of signal source channels required by the LCD panel is N=1080, then its driver IC can use any signal source channel number greater than or The driver IC of the existing 3-primary LCD panel equal to 1080, such as the driver IC of FHD screen 1920*1080, the driver IC of HD screen 1280*720 or the driver IC of QHD screen 960*540, the number of signal source channels of these driver ICs are respectively 3240, 2160, 1620. In addition, the sub-pixel array applied in the present invention is a 960*1080 LCD panel, and its driving IC can even be a WVGA screen driving IC, and the number of signal source channels is 480*3=1440.

For another example, when the resolution sub-pixel array of the LCD panel used in the present invention is 1280*1440, and the number of signal source channels required by the LCD panel is N=1440, then its driver IC can use any signal source channel number greater than Or the driver IC of the existing 3-primary LCD panel equal to 1440, such as the driver IC of FHD screen 1920*1080, the driver IC of HD screen 1280*720 or the driver IC of QHD screen 960*540, the number of signal source channels of these driver ICs They are 3240, 2160, 1620 respectively. In addition, the sub-pixel array applied in the present invention is a 1280*1440 LCD panel, and its driving IC can even use a WVGA screen driving IC, and the number of signal source channels is exactly 480*3=1440.

As another example, when the sub-pixel array of the LCD panel used in the present invention is 1920*2160, and the number of signal source channels required by the LCD panel is N=2160, then its driver IC can use any signal source channel number greater than or equal to 2160 existing 3-color LCD panel driver IC, such as FHD screen 1920*1080 driver IC or HD screen 1280*720 driver IC, the signal source channels of these two driver ICs are 3240 and 2160 respectively.

Wherein, the polarity distribution of the sub-pixel dot matrix depends on the output polarity of the signal source. Moreover, the control of the positive and negative polarities of the sub-pixels by the signal source output of the driver IC requires the control of a special polarity selection circuit. In order to reduce the complexity of the control circuit, the polarity selection is not completely free to define, but some output polarity schemes are prepared in advance and selected from them when actually used on the terminal. Therefore, some polarity inversion methods built into the driver IC, such as single-point inversion, multi-point inversion, column inversion, zig-zag inversion, etc., can only be selected but cannot be changed.

Here, for the convenience of description, the polarity selection circuit of the driving IC used in this paper is mostly based on column inversion as an example. However, those skilled in the art should understand that this example is only for the purpose of explaining the present invention, and should not be regarded as any limitation to the present invention. Other existing polarity reversal methods, such as they can be applied to the present invention , such as point flipping, frame flipping, etc., still belong to the patent protection scope of the present invention.

Figure 6 shows the RGWB compliant

WBRG

The polarity distribution mode of the liquid crystal panel with the 4-color sub-pixel structure in the color arrangement mode. Wherein, the polarities of all sub-pixels in each column are the same, and the polarity distribution between adjacent columns is a periodic arrangement in which "+-+-" and "-+-+" appear alternately. According to this, in the row direction, the polarity is defined as a unit every 4 columns, and the normal column inside the unit is reversed, and the polarity of the subpixels of the same color between adjacent units is opposite, that is, the corresponding position pixels between adjacent units opposite polarity.

FIG. 7 a shows the sub-pixel polarity distribution when the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 6 displays red in full screen. Wherein, all R sub-pixels are turned on, and all other sub-pixels are turned off. On each row, the polarity of the R subpixels is always complementary. With reference to FIG. 7b , from the first row to the fourth row, the R subpixels are always complementary in polarity, and there will be no bias coupling caused by the same polarity of the subpixels in a single row. Similarly, for a full screen display of other colors, on any row, any one of the monochromatic subpixels is always complementary in polarity.

FIG. 8 a shows the sub-pixel polarity distribution when the liquid crystal panel with the 4-color sub-pixel structure shown in FIG. 6 displays cyan in the full screen. Wherein, the G sub-pixel and the B sub-pixel are all turned on, and the other sub-pixels are all turned off. On each row, the polarity of the G subpixels is always complementary, and the polarity of the B subpixels is always complementary. Referring to FIG. 8b , from the first row to the fourth row, the G sub-pixel and the B sub-pixel are always complementary in polarity, and there will be no biased coupling caused by the same polarity of a single row of sub-pixels.

In the present invention, when using a driver IC based on an LCD panel with a 3-primary-color sub-pixel structure to drive an LCD panel based on a 2n-primary-color sub-pixel structure, in the row direction, sub-pixels that are an integer multiple of 2n are used as a unit, such as The sub-pixels of 2n*k columns are one unit, for any continuous sub-pixels of the same integer multiple of 2n in every two consecutive units, such as the sub-pixels of any continuous 2n*k columns in every two consecutive units, with 2 columns are a subunit, and the driver IC and the 2 signal source channels corresponding to each subunit are exchanged and connected (that is, cross-connected) to the 2 columns of subpixels in the corresponding subunit, that is, the first signal source channel Connect to the subpixel in the second column of the corresponding subunit, and connect the second signal source channel to the subpixel in the first column of the corresponding subunit, so that the polarities of the subpixels of the same color in each row are complementary.

FIG. 9 shows an exemplary polarity selection connection schematic diagram of the driving method according to the present invention. Among them, the LCD panel with 4-color sub-pixel structure complies with RGWB

WBRG

, and only 4 sets of arrangements are shown here. Each column of subpixels has the same polarity. The sub-pixel array of the liquid crystal panel is 1280*1440, the driving method adopts the existing HD screen 1280*720 driving IC, and the number of signal source channels is 2160.

In the row direction, 4 columns of sub-pixels are used as a unit. For the sub-pixels of 4 consecutive columns in every two consecutive units, such as the 2nd-5th column of sub-pixels, 2 columns are used as a sub-unit. The driver IC and the first sub-pixel The two signal source channels corresponding to the unit (that is, the second and third signal source channels) are cross-connected to the two columns of sub-pixels in the sub-unit in reverse order, that is, the second signal source channel is connected to the first sub-unit The second column of sub-pixels in the first sub-pixel unit (that is, the third column of sub-pixels in the first sub-pixel unit), connect the third signal source channel to the first column of sub-pixels in the first sub-unit (that is, the first sub-pixel unit in the The second column of sub-pixels), repeat the previous cross-connection steps for the 2 columns of sub-pixels in the next subunit, that is, the 4th and 5th signal source channels of the driver IC are cross-connected to the 2nd and 5th signal source channels in the second subunit The first column of sub-pixels (that is, the first column of sub-pixels in the second sub-pixel unit and the fourth column of sub-pixels in the first column of sub-pixel units), and so on, repeat the previous cross-connection steps until all sub-units in a unit All the sub-pixels in the drive IC are cross-connected to the corresponding signal source channels of the driver IC; then repeat the steps of dividing sub-units and cross-connecting the next unit until each sub-pixel column in all units in the row direction is connected to The corresponding signal source channels of the drive ICs are such that the polarities of the subpixels of the same color in each row are complementary.

Here, since the number of signal source channels required by this driving method is 1440, but the number of signal source channels of the driver IC used this time is 2160, for the remaining 720 (2160-1440) signal source channels, connect them hang empty. Wherein, the signal source channels connected to the LCD panel may be any continuous 1440 signal source channels of the driving IC used.

In addition, for the LCD panel shown in FIG. 9 , the drive IC for the existing FHD screen 1920*1080, the drive IC for the QHD screen 960*540 or the drive IC for the WVGA screen can also be used. When using the driver IC of the existing 3-primary color FHD screen or QHD screen, after any continuous 1440 signal source channels of the driver IC are connected to all sub-pixel columns of the LCD panel in sequence according to the above connection steps, the remaining signal The connection of the source channel is empty. When the driver IC of the existing WVGA screen is used, since the number of signal source channels is exactly 1440, after connecting all the signal source channels to all sub-pixel columns of the LCD panel in sequence according to the above connection steps, there will be no remaining signal source channels .

Referring to Figure 10, 4 columns of sub-pixels are still taken as a unit, and for 4 consecutive columns of sub-pixels in every two consecutive units, such as the sub-pixels in the 1st to 4th columns, and the corresponding sequence of signal source channels, that is, the driver IC used The 1st to 4th signal source channels of the driver IC are cross-connected according to 2 columns per subunit, such as connecting the 1st column (that is, the 1st column of subpixels) of the 1st subunit with the 2nd signal source channel of the driver IC Connect, connect the 2nd column in the 1st subunit (that is, the 2nd column of subpixels) with the first signal source channel of the driver IC, and connect the 1st column in the 2nd subunit (ie, the 3rd column of subpixels) with the driver The 4th signal source channel of the IC is connected, and the 2nd column in the 2nd subunit (that is, the 4th column of subpixels) is connected to the 3rd signal source channel of the driver IC, and the polarity distribution of the subpixels thus obtained is The polarity complementarity of sub-pixels of the same color is also satisfied in the row direction.

In addition, for an LCD screen with 4 primary color sub-pixels, 8 columns of sub-pixels are used as a unit, and for every two consecutive units of 8 consecutive columns of sub-pixels and corresponding signal source channels, 2 columns are used as a sub-unit. In the unit, the sub-pixel column and the signal source channel corresponding to the sub-unit are switched and cross-connected, so that the polarities of the sub-pixels of the same color are always complementary in the row direction.

According to the driving method of the present invention, when the driving IC adopts any flipping method, in the row direction, the polarities of the sub-pixels of the same color are always complementary; The polarity of the subpixels is also complementary.

When the LCD panel is used to display images, the signal source channels output image data, and output corresponding image data in the order of sub-pixel columns connected to each signal source channel. Accordingly, the output order of the image data is the same as the order of the corresponding sub-pixel columns when it is displayed on the LCD panel, and the image signal will be output to the corresponding pixel column, and the overall image is still displayed normally. For example, when the subpixels of the LCD panel are arranged like RGWBRGWB…

WBRGWBRG…,

The 3rd and 4th signal source channels of the driver IC are cross-connected with the 3rd and 4th column sub-pixels, and the 5th and 6th signal source channels of the driver IC are cross-connected with the 5th and 6th column sub-pixels, that is, the third channel of the driver IC The signal source channel is connected to the 4th column of sub-pixels, the 4th signal source channel of the driver IC is connected to the 3rd column of sub-pixels, the 5th signal source channel of the driver IC is connected to the 6th column of sub-pixels, the 6th signal source of the driver IC The channel is connected to the sub-pixels in the fifth column, so that the image data is output according to the order of the sub-pixel columns, that is, the output order of the image data is consistent with the order of the sub-pixel columns. For the 3rd to 6th signal sources of the driver IC channel, the driver IC will output image data in the order of the 4th signal source channel → the 3rd signal source channel → the 6th signal source channel → the 5th signal source channel.

According to the driving method of the present invention, the order of the image data output by the signal source channel needs to be changed, which does not require additional cost for systems that use algorithms to realize non-common RGB displays such as RGBW. For this type of display system, the RGB signal of the traditional image needs to be processed by a special conversion chip into a signal suitable for the RGBW pixel system. During this conversion process, it is very easy to change the order of the image data output by the signal source channel. Achieved. In this way, the RGBW display can be realized while using the traditional LCD driver chip, and the display defect that may be caused by the RGBW color distribution can be eliminated by using the pixel polarity distribution of the present invention.

FIG. 11 shows a schematic diagram of a part of the connection between a driving IC and an LCD panel according to the present invention, and the driving IC is applied to an LCD panel based on a sub-pixel structure of 4 primary colors. The sub-pixel array of the LCD panel is 1280*1440.

The number of signal source channels of the driver IC is N=1440; as shown in Figure 11, in the row direction, each signal source channel of the driver IC is sequentially connected to the sub-pixels in the corresponding column, and all the sub-pixels in the same column have the same polarity. And 4 columns of sub-pixels are used as a unit, so that the polarities of the sub-pixels of the same color in two adjacent units are opposite, and the polarities of the sub-pixels of the same color in each row are complementary.

Moreover, since the polarity selection circuit of the driving IC adopts column inversion, the driving IC makes normal column inversion inside each unit, and the polarity of sub-pixels at corresponding positions between adjacent units is reversed.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned. In addition, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or devices stated in the system claims may also be realized by one unit or device through software or hardware. The words first, second, etc. are used to denote names and do not imply any particular order.

Claims (11)

1. a kind of driving method for LCD panel, wherein, the array of sub-pixels of the LCD panel is M*N and the LCD faces Sub-pixel structure of the plate based on 2n primary colours, n are the integer more than or equal to 2；Wherein, each sub-pixel sub-pixel adjacent thereto Differ；

Wherein, which utilizes the driving IC of the LCD panel based on 3 primary color sub-pixels structures；

Wherein, which includes：

- in the row direction, the sub-pixel arranged using the integral multiple of 2n is a unit, for continuous 2n in each two sequential cells The sub-pixel of same integral multiple row, with 2 row for a subelement, by the driving IC 2 signal sources corresponding with each subelement Passage cross-connects to 2 row sub-pixels in corresponding subelement, so that the polarity of the sub-pixel of same color is complementary in often going； Wherein, the sub-pixel of the same integral multiple row of the continuous 2n crosses over two affiliated sequential cells；

- when the LCD panel is used to display image, the output order and the signal source channels of the driving IC of view data The order for being connected to the sub-pixel column of the LCD panel is identical.

2. driving method according to claim 1, wherein, which further includes：

- when the signal source port number of the driving IC is more than N, the line of remaining signal source channels is hung empty.

3. driving method according to claim 1, wherein, the polarity selecting circuit of the driving IC includes turning over based on row Turn, put the polarity selecting circuit of any one of upset or zigzag upset.

4. driving method according to any one of claim 1 to 3, wherein, the LCD panel is based on 4 primary color sub-pixels Structure.

5. driving method according to claim 4, wherein, 4 primary color sub-pixels include red sub-pixel, the sub- picture of green Element, blue subpixels and a kind of sub-pixel of other colors.

6. driving method according to claim 5, wherein, the sub-pixel of other colors is white sub-pixels.

7. a kind of driving IC for LCD panel, wherein, the array of sub-pixels of the LCD panel is M*N and the LCD panel Based on the sub-pixel structure of 2n primary colours, n is the integer more than or equal to 2；Wherein, each sub-pixel sub-pixel adjacent thereto is not It is identical；

Wherein, driving IC is configured as：

- signal source port number is N；

- in the row direction, N number of signal source channel sequence of driving IC is connected to the sub-pixel of respective column, and son is arranged with 2n Pixel is a unit so that the opposite polarity of the sub-pixel of same color in two neighboring unit.

8. driving IC according to claim 7, wherein, the polarity selecting circuit of driving IC is included based on row upset, point Upset or zigzag upset any one of polarity selecting circuit.

9. the driving IC according to claim 7 or 8, wherein, wherein, the LCD panel is based on 4 primary color sub-pixels structures.

10. driving IC according to claim 9, wherein, 4 primary color sub-pixels include red sub-pixel, the sub- picture of green Element, blue subpixels and a kind of sub-pixel of other colors.

11. driving IC according to claim 10, wherein, the sub-pixel of other colors is white sub-pixels.