TWI527013B - Display panel and data conversion method - Google Patents

Description

Display panel and data conversion method

The present invention relates to a display panel, and more particularly to a data conversion method in a display panel.

In order to improve the transmittance and reduce the power consumption, the technology of a display panel having sub-pixels of four colors such as red, green, blue, and white (RGBW) can be found in various applications.

However, the size of the sub-pixels using the four colors is relatively smaller than the size of the sub-pixels of the commonly-used three-color (RGB), so that the image of the panel of the four-color sub-pixel is in some cases insufficient in brightness and color. The problem of insufficient saturation. In addition, as the resolution of the product application becomes higher and higher, it becomes more and more difficult to set four sub-pixels in one pixel in the panel.

Therefore, how to enable the display panel to effectively display four colors while improving the fluency and brightness of the screen while reducing the size of the sub-pixels is one of the current important research and development topics, and has become a related field. There is an urgent need for improvement.

One aspect of the present disclosure is to provide a display panel. The display panel includes a plurality of pixels, a pixel conversion unit, and a pixel data generation unit. The pixel conversion unit is configured to generate four gradation values corresponding to the four display colors for each pixel according to the original image signal. The pixel data generating unit is configured to determine one pixel data of the plurality of pixels. Each of the pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel arranged in a horizontal direction to respectively correspond to three of the four display colors. The second sub-pixel value of the second sub-pixel of the Nth pixel is determined according to the gradation value of the corresponding color in the Nth pixel, and the first sub-pixel value of the first sub-pixel of the Nth pixel is according to the first N pixels and the N-1th pixel are determined by the two color gradation values of the corresponding color, and the third sub-pixel value of the third sub-pixel of the Nth pixel is based on the Nth pixel and the N+1th The two gradation values of the corresponding colors in the pixels are determined, and N is a positive integer greater than one.

Another aspect of the present disclosure is to provide a data conversion method for driving a display panel, wherein the display panel includes a plurality of pixels, each pixel including a first sub-pixel sequentially arranged in a horizontal direction, The second sub-pixel and the third sub-pixel. The pixel data conversion method comprises the following steps: generating a four-color image signal according to an original image signal, wherein the four-color image signal includes four color gradation values for four corresponding display colors in each pixel; and determining one pixel data of the plurality of pixels The second sub-pixel value of the second sub-pixel of the Nth pixel is determined according to the gradation value of the corresponding color in the Nth pixel, and the first sub-pixel value of the first sub-pixel of the Nth pixel is According to the second color of the corresponding color of the Nth pixel and the N-1th pixel, and the third sub-pixel of the Nth pixel The pixel value is determined according to the two gradation values of the corresponding color in the Nth pixel and the N+1th pixel, and N is a positive integer greater than 1.

In summary, the display panel and data conversion method disclosed in the present disclosure can effectively display four colors without reducing the size of the sub-pixels, and at the same time improve picture fluency and brightness.

In order to make the disclosure more obvious, the attached symbols are as follows:

100‧‧‧ display panel

120‧‧‧Image display area

122‧‧‧Pixel Array

124‧‧ ‧ pixels

140‧‧‧pixel conversion unit

142‧‧‧Pixel data generation unit

160‧‧‧Source Driver

180‧‧‧gate driver

a, b, c‧‧‧ subpixels

GL1~GLM‧‧‧ gate line

DL1~DLN‧‧‧ data line

RGB‧‧‧ raw image signal

RGBW‧‧‧ four-color image signal

DRGB‧‧‧ modulated image signal

DATA1‧‧‧ image data

DATA2‧‧‧Pixel data

300, 400‧‧‧ method

301, 302, 303, 304, 305, 306, 303a, 304a, 304b, 305a, 306a, 306b, 401, 402, 403, 404, 405, 406, 403a, 404a, 404b, 405a, 406a, 406b‧‧ step

R, G, B, R1 to R5, G1 to G5, B1 to B5, R1' to R5', G1' to G5', B1' to B5', B6', W1' to W5' ‧ ‧ gradation values

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. 2 is a schematic diagram of the original image signal, the four-color image signal, and the data of each sub-pixel in FIG. 1; FIG. 3 is a flowchart illustrating a data conversion method for calculating the sub-pixel a according to an embodiment of the present disclosure; And FIG. 4 is a flow chart showing a data conversion method for calculating the sub-pixel c according to an embodiment of the present disclosure.

The embodiments are described in detail below with reference to the accompanying drawings, but the embodiments are not intended to limit the scope of the invention, and the description of structural operations is not intended to limit the order of execution thereof The structure, which produces equal devices, is within the scope of the present invention. In addition, the drawings are for illustrative purposes only and are not based on the original size. Figure. For ease of understanding, the same elements in the following description will be denoted by the same reference numerals.

The terms "first", "second", etc., as used herein, are not intended to refer to the order or the order, and are not intended to limit the invention, only to distinguish the elements described in the same technical terms. Or just operate.

In addition, the term "coupled" or "connected" as used herein may mean that two or more elements are in direct physical or electrical contact with each other, or indirectly in physical or electrical contact with each other, or Multiple components operate or act upon each other.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a display panel 100 according to an embodiment of the disclosure. As shown in FIG. 1 , the display panel 100 includes an image display area 120 , a pixel conversion unit 140 , a pixel data generation unit 142 , a source driver 160 , and a gate driver 180 . The image display area 120 includes a pixel array formed by a plurality of data lines (eg, N data lines DL1 DLNN) and a plurality of gate lines (eg, M gate lines GL1 GGLM) and a plurality of pixels 124. 122. Each pixel 124 includes a sub-pixel a, a sub-pixel b, and a sub-pixel c. The sub-pixel a, the sub-pixel b, and the sub-pixel c are sequentially arranged in the horizontal direction, and are arranged to display different colors. For example, in the same pixel 124, the sub-pixel a is used to display red, the sub-pixel b is used to display blue, and the sub-pixel c is used to display green. In various embodiments, the sub-pixel a, the sub-pixel b, and the sub-pixel c in the same pixel 124 can respectively display three of red, green, blue, and white.

The pixel conversion unit 140 is configured to receive the original image signal RGB and generate a four-color image signal RGBW according to the original image signal RGB. In this disclosure In various embodiments of the content, the four-color image signal RGBW produces four gradation values for each of the four display colors (ie, red, green, blue, white).

The pixel data generating unit 142 determines the pixel data of the plurality of pixels 124 based on the four color image signals RGBW. The pixel data of each pixel 124 includes pixel values of sub-pixel a, sub-pixel b, and sub-pixel c. In other words, the pixel data generating unit 142 can generate the modulated image signal DRGB to the source driver 160 according to the four color image signal RGBW, wherein the modulated image signal DRGB includes pixel data in the plurality of pixels 124. In some embodiments, the pixel conversion unit 140 and the pixel data generation unit 142 described above may be a control wafer. In other embodiments, the pixel conversion unit 140 and the pixel data generation unit 142 can be integrated in a timing controller.

The source driver 160 is coupled to the pixel data generating unit 142 and configured to generate a plurality of data signals according to the modulated image signal DRGB and transmit the data signals to the corresponding pixels 124 through the data lines DL1 DL DLN. The gate driver 180 is coupled to the gate lines GL1 G GLM and is used to output the gate driving signals to the gate lines GL1 G GLM and then to the image display area 120 to the corresponding pixels 124 .

In various embodiments of the present disclosure, the pixel data generating unit 142 may calculate the sub-pixel a, the sub-pixel b, and the sub-pixel in the pixel 124 according to the corresponding pixel data corresponding to the currently calculated pixel 124 and the previous and succeeding pixel data. The sub-pixel value of c. In this way, the display panel 100 can have better picture fluency. The relevant operations here will be detailed in the subsequent paragraphs. Bright.

Please refer to FIG. 2, which is a schematic diagram of the original image signal, the four-color image signal, and the data of each sub-pixel in FIG. As shown in FIG. 2, the original image signal RGB includes a plurality of pieces of image data DATA1, and the plurality of pieces of image data DATA1 sequentially correspond to the plurality of pixels 124. Each image data DATA1 includes a gradation value (for example, R1) that enables the corresponding sub-pixel a to display red, so that the corresponding sub-pixel b can display a green gradation value (for example, G1) and the corresponding sub-pixel c can be displayed. The blue level value (for example, B1).

Referring to FIG. 1 together, when the pixel conversion unit 140 receives the original image signal RGB, the four-color image signal RGBW is generated according to the original image signal RGB. In various embodiments, the pixel conversion unit 140 can convert the original image signal RGB into a four-color image signal RGBW by various color sequential methods. For example, as shown in FIG. 2, the pixel conversion unit 140 may interpolate a white pixel value (W1') next to the blue pixel value (B1) of each image data DATA1 to generate a four-color image signal RGBW. That is to say, the four-color image signal RGBW includes a plurality of pieces of pixel data DATA2, and each of the pixels DATA2 corresponds to a specific image data DATA1 and pixels 124. Each of the pixel data DATA2 includes a red gradation value (for example, R1'), a green gradation value (for example, G1'), a blue gradation value (for example, B1'), and a white gradation value (for example, W1').

As described above, the pixel data generating unit 142 can generate the modulated image signal DRGB to the source driver 160 according to the four color image signal RGBW to determine the sub-pixel values of the respective sub-pixels a, b, and c. The pixel data generating unit 142 sorts the colors according to the colors in the plurality of pixel data DATA2. The color gradation value corresponds to the sub-pixel value of the sub-pixel a, the sub-pixel b, and the sub-pixel c in which the plurality of pixels 124 are provided. For example, as shown in FIG. 2, the pixel data generating unit 142 sets the red gradation value (R1'), the green gradation value (G1'), and the blue gradation value (B1') in the pixel data DATA2 of the first pen. Corresponding to the sub-pixel values of the sub-pixel a, the sub-pixel b, and the sub-pixel c in the first pixel 124 of the same column.

In addition, the pixel data generating unit 142 further calculates the sub-pixel values in the pixels 124 after the first pixel 124 of the same column according to the pixel data DATA2 of the pen and the front and rear pixel data DATA2.

For example, as shown in FIG. 2, the sub-pixels a of the second pixel 124 need to display white according to the color order, and the pixel data generating unit 142 can according to the corresponding white gradation value W1' in the first pixel data DATA2. (hereinafter referred to as the previous level gradation value) and the corresponding white gradation value W2' (hereinafter referred to as the first level gradation value) in the second pixel data DATA2 determine the sub-pixel value of the sub-pixel a. The sub-pixel values of the sub-pixels b of the second pixel 124 are displayed in red according to the color order, and the pixel data generating unit 142 can set the corresponding red gradation value R2 ′ in the second pen-pixel data DATA2 as the sub-pixel b. Pixel values. Similarly, the sub-pixel values of the sub-pixels c of the second pixel 124 need to be displayed in green according to the color order, and the pixel data generating unit 142 can be based on the green color-graded value G3' in the third pixel data DATA2 (hereinafter referred to as the secondary color). The step value) and the green gradation value G2' (hereinafter referred to as the second level gradation value) in the second pixel data DATA2 determine the sub-pixel value of the sub-pixel c.

And so on, the pixel data generating unit 142 can generate a plurality of pixels Sub-pixel value of 124. By this arrangement, in the pixel structure having three sub-pixels, the sub-pixels a, b, c in each pixel 124 can respectively display three of red, green, blue, and white. As such, the display panel 100 can display four colors (red, blue, green, and white) without reducing the sub-pixels a, b, and c, thereby improving the brightness of the display panel 100.

The following paragraphs will present several embodiments that may be used to implement the detailed operations of computing sub-pixel a and sub-pixel c described above, but the disclosure is not limited to the following embodiments.

In addition, for convenience of explanation, the gradation value of the corresponding color corresponding to the N-1th pixel used in calculating the sub-pixel value of the sub-pixel a in the Nth pixel is defined as “pre-level gradation”. The value of the gradation value of the corresponding color corresponding to the Nth pixel used in calculating the sub-pixel value of the sub-pixel a in the Nth pixel is defined as the "first-level gradation value". Similarly, the gradation value of the corresponding color corresponding to the (N+1)th pixel used in calculating the sub-pixel value of the sub-pixel c in the Nth pixel is defined as “secondary gradation value”. And the gradation value of the corresponding color corresponding to the Nth pixel used in calculating the sub-pixel value of the sub-pixel c in the Nth pixel is defined as the “second-level gradation value”.

In addition, for convenience of explanation, the calculation process of the pixel values of the sub-pixel a and the sub-pixel c of the second pixel 124 (that is, N=2 described above) will be described below in conjunction with different flowcharts.

Please refer to FIG. 3 . FIG. 3 is a flowchart illustrating a data conversion method for calculating a sub-pixel a according to an embodiment of the present disclosure. For convenience of explanation, the operation of the pixel conversion unit 142 shown in FIG. 1 and the data transfer The method 300 is described together. As shown in FIG. 3, the data conversion method 300 includes a step 301, a step 302, a step 303, a step 304, a step 305, a 306, a step 303a, a step 304a, a step 304b, a step 305a, a step 306a, and a step 306b.

In step 301, the pixel data generating unit 142 receives the plurality of pieces of pixel data DATA2. As described earlier, each of the pixel data DATA2 includes a red color scale value, a green color scale value, a blue color scale value, and a white tone scale value.

In step 302, the pixel data generating unit 142 compares the previous level level value with the first level level level value. If the first level gradation value is greater than or equal to the previous level gradation value, step 303 is performed. On the other hand, if the first level gradation value is smaller than the previous level gradation value, step 305 is performed.

In step 303, the pixel data generating unit 142 further compares a magnitude D1 with a first predetermined value TH1, wherein the magnitude D1 is an absolute value of the difference between the previous level level value and the first level level level value. value. The first predetermined value TH1 can be set according to the system specification of the display panel 100, and is stored in advance in the register of the pixel data generating unit 142. If the magnitude D1 is greater than or equal to the first predetermined value TH1, step 303a is performed. On the other hand, if the magnitude D1 is smaller than the first predetermined value TH1, step 304 is performed.

In step 303a, after the pixel data generating unit 142 confirms that the magnitude D1 is greater than or equal to the first predetermined value TH1, the sub-pixel value of the sub-pixel a is set to the first-level gradation value (ie, the pre-level gradation value and The larger of the first level gradation values). In this way, it is ensured that the display panel 100 maintains a certain brightness and avoids the problem of jaggedness on the edges of the characters on the screen, thereby improving the smoothness of the screen.

For example, taking the sub-pixel a in the second pixel of FIG. 2 as an example, it is assumed that the first predetermined value TH1 is set to 64. Since the sub-pixels a of the second pixel 124 are to be displayed in color according to the color arrangement, the pixel data generating unit 142 sets the previous level gradation value to the white gradation W1 ′ of the first pen pixel data DATA 2 (for example, 16), and The first level gradation value sets the white gradation value W2' of the second pen pixel data DATA2 (for example, 128).

In this example, the pixel data generating unit 142 compares the previous level gradation value (16) with the first level gradation value (128), and knows that the first level gradation value is greater than the previous level gradation value (ie, the step 302). The pixel data generating unit 142 calculates the magnitude D1 (D1=| 16-128 |=112) according to the difference between the previous level gradation value and the first level gradation value, and compares the magnitude D1 with the first After the predetermined value TH1, it is known that the magnitude D1 is greater than the first predetermined value TH1 (ie, step 303). Therefore, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel a to the first-level color gradation value (128).

Referring to FIG. 3 again, in step 304, the pixel data generating unit 142 further compares the magnitude D1 with a second predetermined value TH2, wherein the first predetermined value TH1 is greater than the second predetermined value TH2. Similarly to the first predetermined value TH1, the second predetermined value TH2 may be previously set in the register of the pixel data generating unit 142 according to actual specification requirements. If the magnitude D1 is greater than or equal to the second predetermined value TH2, step 304a is performed. On the other hand, if the magnitude D1 is smaller than the second predetermined value TH2, step 304b is performed.

In step 304a, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel a as the product of the product of the first-level gradation value and the first weight coefficient X1 and the sum of the product of the pre-level gradation value and the second weight coefficient X2. . by The first level gradation value is greater than the previous level gradation value. In this example, the first weighting factor X1 may be set to be greater than the second weighting factor X2, that is, the first level gradation value having a higher brightness. Has a higher weight. In this way, the sub-pixel values of the sub-pixel a can be made to have sufficient brightness.

For example, taking the sub-pixel a in the second pixel of FIG. 2 as an example, it is assumed that the first predetermined value TH1 is set to 64, and the second predetermined value TH2 is set to 32. Since the sub-pixels a of the second pixel 124 are to be displayed in white according to the color arrangement, the pixel data generating unit 142 sets the previous level gradation value to the white gradation value W1 ′ of the first pen pixel data DATA 2 (for example, 32), and The first level gradation value is set to the white gradation value W2' of the second pen pixel data DATA2 (for example, 64).

In this example, the pixel data generating unit 142 calculates the magnitude D1 (D1=| 32-64 |=32) based on the difference between the previous level gradation value and the first level gradation value, and by comparison After the value D1 and the first predetermined value TH1, it is known that the magnitude D1 is smaller than the first predetermined value TH1 (ie, step 303). Therefore, the pixel data generating unit 142 further compares the magnitude D1 with the second predetermined value TH2 (ie, step 304). In this example, since the magnitude D1 is equal to the second predetermined value TH2, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel a to the product of the first-level gradation value and the first weight coefficient X1 and the pre-level gradation. The sum of the product of the value and the second weighting factor X2.

Referring again to FIG. 3, in step 304b, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel a to the average of the previous-level gradation value and the first-level gradation value. Thus, with this arrangement, the sub-pixel a can be made when the pre-level gradation value is close to the first-level gradation value. More uniform brightness performance.

For example, when the second predetermined value TH2 is set to 16, the previous level gradation value is 24, and the first home level gradation value is 16, the pixel data generating unit 142 may set the sub-pixel value of the sub-pixel a to 20.

The operations of steps 305, 305a, 306, 306a, and 306b are similar to the operations of steps 303, 303a, 304, 304a, and 304b described above. The difference is that in steps 305, 305a, 306, 306a, and 306b, the pre-level gradation value is greater than the first-level gradation value. Therefore, in step 305a, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel a to the previous-level gradation value (ie, the greater of the previous-level gradation value and the first-level gradation value). In step 306a, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel a to the product of the pre-level gradation value and the first weight coefficient X1 and the product of the first-level gradation value and the second weight coefficient X2. Sum. The first weight coefficient X1 is greater than the second weight coefficient X2, that is, the higher-level pre-level value has more weights, so that the sub-pixel a can have a certain brightness.

The data conversion method 300 provides a manner of setting sub-pixel values of three different sub-pixels a by the first predetermined value TH1 and the second predetermined value TH2. In this way, the sub-pixel value of the sub-pixel a can be determined by the adjacent two pixel data and the corresponding pixel data to achieve a more uniform and smooth picture brightness performance.

Referring to FIG. 4, FIG. 4 is a flowchart illustrating a data conversion method for calculating a sub-pixel c according to an embodiment of the present disclosure. The data conversion method 400 includes a step 401, a step 402, a step 403, a step 404, a step 405, a 406, a step 403a, a step 404a, a step 404b, and a step. 405a, step 406a, and step 406b.

In step 401, the pixel data generating unit 142 receives the plurality of pieces of pixel data DATA2. In step 402, the pixel data generating unit 142 compares the secondary level value with the second level level value. If the second level gradation value is greater than or equal to the secondary gradation value, step 403 is performed. On the other hand, if the second level gradation value is less than the secondary gradation value, step 405 is performed.

In step 403, the pixel data generating unit 142 further compares the magnitude D2 with a first predetermined value TH1, and the magnitude D2 is an absolute value of a difference between the secondary gradation value and the second primary gradation value. If the magnitude D2 is greater than or equal to the first predetermined value TH1, step 403a is performed. On the other hand, if the magnitude D2 is smaller than the first predetermined value TH1, step 404 is performed.

In step 403a, after the pixel data generating unit 142 confirms that the magnitude D2 is greater than or equal to the first predetermined value TH1, the sub-pixel value of the sub-pixel c is set to the second local value gradation value (ie, the secondary gradation value and the second value). The larger of the values of the values).

For example, taking the sub-pixel c in the second pixel of FIG. 2 as an example, it is assumed that the first predetermined value TH1 is set to 64. Since the sub-pixels c of the second pixel 124 are to be displayed in green according to the color arrangement, the pixel data generating unit 142 sets the secondary gradation value to the green gradation value G3 ′ of the third pen pixel data DATA 2 (for example, 16), and The second level gradation value is set to the green gradation value G2' of the second pen pixel data DATA2 (for example, 128).

In this example, the pixel data generating unit 142 compares the secondary gradation value (16) with the second primary gradation value (128), and knows that the second primary gradation value is greater than the secondary gradation value (ie, the step 402). The pixel data generating unit 142 is based on the secondary The difference between the gradation value and the second gradation value is calculated by the magnitude D2 (D2=| 16-128 |=112), and the amount is obtained by comparing the magnitude D2 with the first predetermined value TH1. The value D2 is greater than the first predetermined value TH1 (ie, step 403). Therefore, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel c to the second-level color gradation value (128).

In step 404, the pixel data generating unit 142 further compares the magnitude D2 with the second predetermined value TH2. If the magnitude D2 is greater than or equal to the second predetermined value TH2, step 404a is performed. On the other hand, if the magnitude D2 is smaller than the second predetermined value TH2, step 404b is performed.

In step 404a, the pixel data generating unit 142 sets the pixel value of the sub-pixel c to the sum of the product of the second-level gradation value and the first weight coefficient X1 and the product of the product of the secondary gradation value and the second weight coefficient X2. . Similarly, since the second level gradation value is greater than the secondary gradation value, in this example, the first weighting factor X1 may be set larger than the second weighting factor X2. In this way, the sub-pixel values of the sub-pixel c can be made to have sufficient brightness.

Taking the sub-pixel c in the second pixel of FIG. 2 as an example, it is assumed that the first predetermined value TH1 is set to 64, and the second predetermined value TH2 is set to 32. Since the sub-pixels c of the second pixel 124 are to be displayed in green according to the color arrangement, the pixel data generating unit 142 sets the secondary gradation value to the green gradation value G3 ′ of the third pen pixel data DATA 2 (for example, 32), and The second level gradation value is set to the green gradation value G2' of the second pen pixel data DATA2 (for example, 64).

In this example, the pixel data generating unit 142 calculates the magnitude D2 based on the difference between the secondary gradation value and the second gradation value (D2=| 32-64 | =32), and by comparing the magnitude D2 with the first predetermined value TH1, it is known that the magnitude D2 is smaller than the first predetermined value TH1 (ie, step 403). Therefore, the pixel data generating unit 142 further compares the magnitude D2 with the second predetermined value TH2 (ie, step 404). In this example, since the magnitude D2 is equal to the second predetermined value TH2, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel c to the product of the second-level gradation value and the first weight coefficient X1 and the secondary gradation. The sum of the product of the value and the second weighting factor X2.

In step 404b, the pixel data generating unit 142 sets the pixel value of the sub-pixel c to the average of the secondary level value and the second level level value. For example, when the second predetermined value TH2 is set to 16, the secondary gradation value is 24, and the second primary gradation value is 16, the pixel data generating unit 142 may set the sub-pixel value of the sub-pixel c to 20.

The operations of steps 405, 405a, 406, 406a, and 406b are similar to the operations of steps 403, 403a, 404, 404a, and 404b described above. The only difference is that in steps 405, 405a, 406, 406a, and 406b, the secondary gradation value is greater than the second primary gradation value. Therefore, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel c to the secondary gradation value in step 405a. In step 406a, the pixel data generating unit 142 sets the sub-pixel value of the sub-pixel c to the product of the secondary gradation value and the first weight coefficient X1 and the product of the second-level gradation value and the second weight coefficient X2. Sum. The first weight coefficient X1 is greater than the second weight coefficient X2, that is, the secondary gradation value with higher brightness has a higher weight, so that the sub-pixel c can have a certain brightness.

The data conversion methods 300 and 400 described above are only the second pixel 124. For example, but not limited thereto, the data conversion methods 300, 400 can be applied to N pixels 124, where N is a positive integer greater than one. By setting the three-level pixel data provided by the data conversion methods 300 and 400, the pixels 124 of the display panel 100 can display four colors of red, blue, green, and white under the structure of three sub-pixels. At the same time, the picture fluency and brightness are improved.

In summary, the display panel and data conversion method disclosed in the present disclosure can effectively display four colors without reducing the size of the sub-pixels, and at the same time improve picture fluency and brightness.

The present disclosure has been disclosed in the above embodiments, and is not intended to limit the present invention, and the present disclosure may be modified and modified without departing from the spirit and scope of the present disclosure. The scope of protection of the content is subject to the definition of the scope of the patent application.

100‧‧‧ display panel

120‧‧‧Image display area

122‧‧‧Pixel Array

124‧‧ ‧ pixels

140‧‧‧pixel conversion unit

142‧‧‧Pixel data generation unit

160‧‧‧Source Driver

180‧‧‧gate driver

a, b, c‧‧‧ subpixels

GL1~GLM‧‧‧ gate line

DL1~DLN‧‧‧ data line

RGB‧‧‧ raw image signal

RGBW‧‧‧ four-color image signal

DRGB‧‧‧ modulated image signal

Claims (18)

A display panel includes: a plurality of pixels; a pixel conversion unit configured to generate four color gradation values corresponding to four display colors for each pixel according to an original image signal; and a pixel data generating unit for determining the One of the pixel data, wherein each pixel includes a first sub-pixel sequentially arranged in a horizontal direction, and a second sub-pixel and a third sub-pixel respectively correspond to three display colors, respectively. The second sub-pixel value of the second sub-pixel of the Nth pixel in the pixel is determined according to the color gradation value of the corresponding color in the Nth pixel, and the first sub-pixel of the Nth pixel The first sub-pixel value is determined according to the two-tone value of the corresponding color in the Nth pixel and the N-1th pixel, and the third sub-pixel value of the third sub-pixel of the Nth pixel is based on The Nth pixel and the N+1th pixel are determined by two gradation values of the corresponding color, and N is a positive integer greater than 1, wherein the pixel data generating unit sets the Nth pixel and the N-1th pixel. Ratio of two gradation values of corresponding colors And comparing a first magnitude with a first predetermined value to determine the first sub-pixel value, wherein the first magnitude is a two-level of the corresponding color of the Nth pixel and the N-1th pixel The absolute value of the difference between the values. The display panel of claim 1, wherein the four display colors comprise red, blue, green, and white. The display panel of claim 1, wherein one of the two gradation values of the corresponding color in the Nth pixel and the N-1th pixel is greater than or equal to the Nth pixel and the N-1th pixel When the other one of the two gradation values corresponding to the color is greater than or equal to the first predetermined value, the pixel data generating unit sets the first sub-pixel value to the Nth pixel and the Nth - the larger of the two gradation values of the corresponding color in one pixel. The display panel of claim 3, wherein when the first quantity is less than the first predetermined value, the pixel data generating unit further compares the first quantity with a second predetermined value, when the first When the magnitude is greater than or equal to the second predetermined value, the pixel data generating unit further determines two color gradation values, a first weight coefficient, and a second weight coefficient of the corresponding color in the Nth pixel and the N-1th pixel. Determining the first sub-pixel value, wherein the first predetermined value is greater than the second predetermined value. The display panel of claim 4, wherein the pixel data generating unit sets the first sub-pixel value to an Nth pixel and an N-1th pixel when the first magnitude is less than the second predetermined value The average of the two gradation values of the corresponding color. The display panel of claim 1, wherein the pixel data generating unit compares the two color gradation values of the corresponding color in the Nth pixel and the N+1th pixel, and compares a second magnitude with a first a predetermined value to decide The third sub-pixel value, wherein the second magnitude is an absolute value of a difference between two gradation values of a corresponding color of the Nth pixel and the (N+1)th pixel. The display panel of claim 6, wherein the pixel data generating unit sets the third sub-pixel value to the Nth pixel and the N-1th when the second magnitude is greater than or equal to the first predetermined value. The larger of the two gradation values of the corresponding color in the pixel. The display panel of claim 7, wherein when the second magnitude is less than the first predetermined value, the pixel data generating unit further compares the second magnitude with a second predetermined value, when the second When the magnitude is greater than or equal to the second predetermined value, the pixel data generating unit further determines two gradation values, a first weight coefficient, and a second weight coefficient of the corresponding color in the Nth pixel and the (N+1)th pixel. The third sub-pixel value is determined, wherein the first predetermined value is greater than the second predetermined value. The display panel of claim 8, wherein the pixel data generating unit sets the third sub-pixel value to the Nth pixel and the N+1th pixel when the second magnitude is less than the second predetermined value The average of the two gradation values of the corresponding color. A data conversion method for driving a display panel, the display panel comprising a plurality of pixels, each pixel comprising a first sub-pixel, a second sub-pixel and a third sub-pixel arranged in a horizontal direction. The image The method for converting data includes: generating a four-color image signal according to an original image signal, wherein the four-color image signal includes four color gradation values for corresponding four display colors in each pixel; determining pixel data of one of the pixels The second sub-pixel value of the second sub-pixel of the Nth pixel of the pixels is determined according to the color gradation value of the corresponding color in the Nth pixel, and the first pixel of the Nth pixel The first sub-pixel value of one of the sub-pixels is determined according to the two-tone value of the corresponding color of the N-th pixel and the N-1th pixel, and the third sub-pixel of the third sub-pixel The pixel value is determined according to the two gradation values of the corresponding color in the Nth pixel and the N+1th pixel, N is a positive integer greater than 1; and the Nth pixel and the N-1th pixel are compared Corresponding to the two gradation values of the color, and comparing a first magnitude with a first predetermined value to determine the first sub-pixel value, wherein the first magnitude is the Nth pixel and the N-1th pixel The absolute value of the difference between the two gradation values of the corresponding color. The data conversion method of claim 10, wherein one of the two gradation values of the corresponding color in the Nth pixel and the N-1th pixel is greater than or equal to the Nth pixel and the N-1th pixel And setting the first sub-pixel value to the Nth pixel and the N-1th pixel when the other one of the two color gradation values of the corresponding color is greater than or equal to the first predetermined value The larger of the two gradation values of the corresponding color. The data conversion method of claim 11, wherein when the first quantity is less than the first predetermined value, the first quantity is compared with a second predetermined value, when the first quantity is greater than or equal to the And determining, by the second predetermined value, the first sub-pixel value according to the two-tone value of the corresponding color in the Nth pixel and the N-1th pixel, a first weight coefficient, and a second weight coefficient, where the first A predetermined value is greater than the second predetermined value. The data conversion method of claim 12, wherein when the first magnitude is smaller than the second predetermined value, setting the first sub-pixel value to a corresponding color of the Nth pixel and the N-1th pixel The average of the two gradation values. The data conversion method of claim 10, further comprising: comparing two gradation values of corresponding colors of the Nth pixel and the N+1th pixel, and comparing a second magnitude with the first predetermined value, The third sub-pixel value is determined, wherein the second magnitude is an absolute value of a difference between two gradation values of the corresponding color in the Nth pixel and the N+1th pixel. The data conversion method of claim 14, wherein one of the two gradation values of the corresponding color in the Nth pixel and the N+1th pixel is greater than or equal to the Nth pixel and the N+1th pixel And setting the third sub-pixel value to the Nth pixel and the N+1th pixel when the other one of the two gradation values of the corresponding color is greater than or equal to the first predetermined value The larger of the two gradation values of the corresponding color. The data conversion method of claim 15, wherein when the magnitude is less than the first predetermined value, the second magnitude is compared with a second predetermined value, and when the second magnitude is greater than or equal to the second Determining the third sub-pixel value according to the two-tone value of the corresponding color in the Nth pixel and the N+1th pixel, a first weight coefficient, and a second weight coefficient, wherein the first predetermined The value is greater than the second predetermined value. The data conversion method of claim 16, wherein when the second magnitude is less than the second predetermined value, setting the third sub-pixel value to a corresponding color of the Nth pixel and the (N+1)th pixel The average of the two gradation values. The data conversion method of claim 10, wherein the four display colors comprise red, blue, green, and white.