CN103887323A

CN103887323A - Display panel and display device thereof

Info

Publication number: CN103887323A
Application number: CN201410124075.0A
Authority: CN
Inventors: 沈仕旻; 李孟庭
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2014-03-28
Filing date: 2014-03-28
Publication date: 2014-06-25

Abstract

The invention provides a display panel and a display device thereof. The display panel is provided with a pixel array. The pixel array comprises multiple pixel units, each pixel unit is formed by two first sub pixels, two second sub pixels, two third sub pixels and two fourth sub pixels, and any two adjacent sub pixels are of different colors. The connecting lines of the centers of the adjacent first sub pixels, the centers of the adjacent second sub pixels, the centers of the adjacent third sub pixels and the centers of the adjacent fourth sub pixels form a non-rectangular parallelogram. Compared with the prior art, the display panel and the display device thereof can reduce the number of the sub pixels of each original pixel from three to two to reduce the area of pixel layout of the pixels, and image resolution in display can be improved. In addition, sub pixel design of RGBY four colors is adopted by the pixel units of the display panel and the display device thereof, and power consumption is lowered by being compared with sub pixel design of RGB three-primary colors.

Description

Display panel and display device thereof

Technical Field

The present invention relates to the field of semiconductor technology and organic electroluminescent display technology, and more particularly, to a display panel having a novel pixel arrangement structure and a display device thereof.

Background

The Organic Light Emitting Diode (OLED) can be classified into a Passive Matrix OLED (PMOLED) and an Active Matrix OLED (AMOLED) according to a driving method. The PMOLED is that when data is not written, the light emitting diode does not emit light; the light emitting diode emits light only during data writing. The driving mode has simple structure, low cost and easy design, and is mainly suitable for small and medium-sized displays. In the AMOLED, each pixel has a capacitor for storing data, so that each pixel is maintained in a light-emitting state. The power consumption of the AMOLED is significantly less than that of the PMOLED, and the driving method thereof is suitable for developing a large-sized and high-resolution display, so that the AMOLED is a main development direction in the future.

Generally, PPI (Pixels Per Inc) is the unit of image resolution of a display, representing the number of pixels Per inch that it possesses. The higher the PPI value is, the higher the density of the displayed image on the display screen is, and the more the details of the image are enriched. However, in the prior art, the AMOLED often increases the complexity of the pixel circuit and further increases the area of the pixel layout. Therefore, it is obviously difficult to achieve a high image resolution with this driving scheme.

Another solution to improve the image resolution of AMOLED in the prior art is to use Pentile technology. Specifically, the conventional pixel is composed of three red, green and blue sub-pixels (RGB), while the Pentile single pixel is different, one is a red and green sub-pixel, and the other is a blue and green sub-pixel. As is well known, only three primary colors constitute all colors, while two colors do not constitute all colors. Therefore, when the image is actually displayed, a pixel of Pentile "borrows" another color of the pixel adjacent to the pixel to form three primary colors. For example, in the horizontal direction, each pixel and the adjacent pixels share a sub-pixel of a color that they do not have, to achieve the effect of white display in common. The pixel arrangement adopting the Pentile technology has the advantages that only two colors of organic light-emitting materials are arranged on each display unit, and the material area is large, so that the process difficulty can be reduced, and the cost can be reduced. However, this design also has a limit on resolution improvement.

In view of the above, a need still exists in the art for a display panel and a display device thereof, or how to improve the conventional display panel, especially the pixel arrangement, to reduce the area of the sub-pixel layout, improve the image resolution, and reduce the average power consumption during image display.

Disclosure of Invention

In view of the above-mentioned drawbacks of the display panel in the prior art, the present invention provides a novel display panel and a display device including the same, so as to reduce the area of the sub-pixel layout and improve the image resolution.

According to an aspect of the present invention, there is provided a display panel having a pixel array, wherein the pixel array of the display panel includes a plurality of pixel units, each pixel unit is composed of 8 sub-pixels including two first sub-pixels, two second sub-pixels, two third sub-pixels and two fourth sub-pixels, any two adjacent sub-pixels are different in color, and central connecting lines of the adjacent first sub-pixels, second sub-pixels, third sub-pixels and fourth sub-pixels form a non-rectangular parallelogram.

In an embodiment of the present invention, the pixel unit is divided into four columns, a first column and a third column sequentially set the first sub-pixel and the second sub-pixel, a second column and a fourth column sequentially set the third sub-pixel and the fourth sub-pixel, and two adjacent columns are arranged in a staggered manner.

In an embodiment of the present invention, the pixel unit is divided into four rows, the first sub-pixel and the second sub-pixel are located in the first row and the third row and arranged in an opposite order, the third sub-pixel and the fourth sub-pixel are located in the second row and the fourth row and arranged in an opposite order, and two adjacent rows are arranged in a staggered manner.

In an embodiment of the present invention, the pixel unit is divided into four rows, the first sub-pixel and the fourth sub-pixel are located in the first row and the third row and arranged in an opposite order, the second sub-pixel and the third sub-pixel are located in the second row and the fourth row and arranged in an opposite order, and two adjacent rows are arranged in a staggered manner.

In one embodiment, the first to fourth sub-pixels are rectangular, regular hexagonal or diamond.

According to another aspect of the present invention, a display panel having a pixel array is provided, wherein the pixel array of the display panel at least includes a first pixel group and a second pixel group, and the first pixel group and the second pixel group have four sub-pixels with different colors, the first sub-pixel and the second sub-pixel in the first pixel group are arranged in a first row, and the third sub-pixel and the fourth sub-pixel are arranged in a second row; the first sub-pixels and the second sub-pixels in the second pixel group are arranged in a third row, the third sub-pixels and the fourth sub-pixels are arranged in a fourth row, any two adjacent rows are arranged in a staggered mode, any two adjacent sub-pixels are different in color, and central connecting lines of the first sub-pixels, the second sub-pixels, the third sub-pixels and the fourth sub-pixels which are adjacent form a non-rectangular parallelogram.

In one embodiment, the first sub-pixel and the second sub-pixel are arranged in the first column and the third column in the reverse order, and the third sub-pixel and the fourth sub-pixel are arranged in the second column and the fourth column in the reverse order.

In one embodiment, the first to fourth sub-pixels are a blue sub-pixel, a red sub-pixel, a yellow sub-pixel and a green sub-pixel, respectively.

In one embodiment, the first to fourth sub-pixels are a blue sub-pixel, a yellow sub-pixel, a red sub-pixel and a green sub-pixel, respectively.

According to still another aspect of the present invention, there is provided a display device including:

a display panel according to an aspect of the present invention;

the sub-pixel display circuit is used for respectively outputting first color data, second color data, third color data and fourth color data; and

and the driving circuit is electrically coupled to the sub-pixel display circuit and the display panel and is used for respectively converting the received first color data, second color data, third color data and fourth color data into a first pixel voltage, a second pixel voltage, a third pixel voltage and a fourth pixel voltage so as to correspondingly control four different sub-pixels.

The display panel and the display device thereof adopt the invention, the pixel array of the display panel comprises a plurality of pixel units, each pixel unit consists of 8 sub-pixels including two first sub-pixels, two second sub-pixels, two third sub-pixels and two fourth sub-pixels, any two adjacent sub-pixels are different in color, and the central connecting lines of the adjacent first sub-pixels, second sub-pixels, third sub-pixels and fourth sub-pixels form a non-rectangular parallelogram. Compared with the prior art, the invention can reduce the number of the sub-pixels of each pixel from three to two so as to reduce the area of pixel layout and improve the image resolution during display. In addition, the pixel unit of the invention adopts the sub-pixel design of the RGBY four colors, and the power consumption is lower than that of the sub-pixel design of the RGB three primary colors. Moreover, the color coverage of the panel can be larger due to the introduction of the yellow sub-pixel.

Drawings

The various aspects of the present invention will become more apparent to the reader after reading the detailed description of the invention with reference to the attached drawings. Wherein,

FIG. 1 is a schematic diagram of a pixel arrangement of a display panel according to an embodiment of the invention;

FIG. 2A illustrates an alternative embodiment of a pixel arrangement of the display panel of FIG. 1;

FIG. 2B illustrates another alternative embodiment of a pixel arrangement of the display panel of FIG. 1;

FIG. 3 is a schematic diagram of a pixel arrangement of a display panel according to another embodiment of the invention;

FIG. 4 is a schematic diagram illustrating a manufacturing process of a pixel arrangement of the display panel of FIG. 1;

fig. 5 (a) to 5 (c) show schematic diagrams of the shape of a sub-pixel in the pixel arrangement of fig. 1 or 3, respectively; and

fig. 6 is a schematic structural view illustrating a display device according to still another embodiment of the present invention.

Detailed Description

In order to make the present disclosure more complete and complete, reference is made to the accompanying drawings, in which like references indicate similar or analogous elements, and to the various embodiments of the invention described below. However, it will be understood by those of ordinary skill in the art that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for illustrative purposes and are not drawn to scale.

Specific embodiments of various aspects of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram illustrating a pixel arrangement of a display panel according to an embodiment of the invention. The display panel of the present invention has a pixel array. The pixel array includes a plurality of pixel units 1. In the present application, unless otherwise specifically described, B denotes a Blue (Blue) subpixel, R denotes a Red (Red) subpixel, G denotes a Green (Green) subpixel, and Y denotes a Yellow (Yellow) subpixel.

As shown in fig. 1, each pixel unit 1 includes 8 sub-pixels. The pixel unit 1 is composed of two blue sub-pixels 100, two yellow sub-pixels 102, two red sub-pixels 104, and two green sub-pixels 106. The pixel unit 1 is divided into four columns as viewed from rows and columns of the pixel structure, the sub-pixel 100 and the sub-pixel 104 are sequentially disposed in the 1 st and 3 rd columns, the sub-pixel 102 and the sub-pixel 106 are sequentially disposed in the 2 nd and 4 th columns, and the 1 st and 2 nd columns are staggered, and the 2 nd and 3 rd columns are staggered.

In addition, as can be seen from the pixel arrangement of fig. 1, any two adjacent sub-pixels are different colors. For example, the leftmost sub-pixel B is adjacent to the sub-pixel Y, the sub-pixel G, and the sub-pixel R, but is not adjacent to another sub-pixel B. The sub-pixel Y located between the two sub-pixels B is adjacent to the sub-pixel B and the sub-pixel G, but is not adjacent to the other sub-pixel Y. The connecting lines of the centers of the adjacent sub-pixels B, Y, R, and G form a non-rectangular parallelogram as indicated by the bold solid-line frame in the figure.

FIG. 2A illustrates an alternative embodiment of a pixel arrangement of the display panel of FIG. 1. Fig. 2B illustrates another alternative embodiment of a pixel arrangement of the display panel of fig. 1.

As shown in fig. 2A, in this alternative embodiment, the pixel unit 1 is divided into four columns, the sub-pixel B and the sub-pixel R are located in the 1 st column, and the sub-pixel B is in the 1 st row and the sub-pixel R is in the 2 nd row. In contrast, the sub-pixels B and R are located in the 3 rd column, and the sub-pixel B is located in the 2 nd row and the sub-pixel R is located in the 1 st row, i.e. the sub-pixels in the 1 st column and the 3 rd column are the same but arranged in the opposite order.

Similarly, subpixel Y and subpixel G are in column 2, with subpixel Y in row 1 and subpixel G in row 2. The sub-pixel Y and the sub-pixel G are also located in the 4 th column, and the sub-pixel Y is located in the 2 nd row and the sub-pixel G is located in the 1 st row, that is, the sub-pixels in the 2 nd column and the 4 th column are the same but arranged in the opposite order.

The main difference between fig. 2B and fig. 2A is that the color of the sub-pixels in each column is different. Specifically, the sub-pixel B and the sub-pixel Y are located in the 1 st column and the 3 rd column in the opposite arrangement order, the sub-pixel R and the sub-pixel G are located in the 2 nd column and the 4 th column in the opposite arrangement order, and adjacent two columns are staggered.

Fig. 3 is a schematic diagram illustrating a pixel arrangement of a display panel according to another embodiment of the invention. Referring to fig. 3, in this embodiment, the display panel has a pixel array. The pixel array at least comprises a first pixel group 20 and a second pixel group 22, and the first pixel group 20 and the second pixel group 22 have four sub-pixels with different colors. In some embodiments, the shape of the sub-pixel may include a variety, such as a rectangle, a regular hexagon, or a diamond, as shown in fig. 5 (a) -5 (c).

In detail, the first pixel group 20 includes a sub-pixel 201, a sub-pixel 203, a sub-pixel 205, and a sub-pixel 207. The sub-pixels 201 and 205 are arranged in a first column, and the sub-pixels 203 and 207 are arranged in a second column. Any two adjacent sub-pixels are different in color, and the central connecting lines of the

adjacent sub-pixels

201, 203, 205 and 207 form a non-rectangular parallelogram. The sub-pixels in the first and second columns are staggered, i.e. the sub-pixels 201 and 203 are located in different rows, and the sub-pixels 205 and 207 are also located in different rows.

The second pixel group 22 includes a sub-pixel 221, a sub-pixel 223, a sub-pixel 225, and a sub-pixel 227. The sub-pixels 221 and 225 are arranged in a first column, and the sub-pixels 223 and 227 are arranged in a second column. Any two adjacent sub-pixels are different colors, and the central connecting lines of the

adjacent sub-pixels

221, 223, 225 and 227 form a non-rectangular parallelogram. The sub-pixels in the first and second columns are staggered, i.e. the sub-pixels 221 and 223 are located in different rows, and the sub-pixels 225 and 227 are also located in different rows.

It should be understood by those skilled in the art that fig. 3 only schematically illustrates one pixel arrangement structure of the display panel, where the first columns of the first pixel group 20 and the second pixel group 22 are the red sub-pixel and the blue sub-pixel, and the second columns of the first pixel group 20 and the second pixel group 22 are the yellow sub-pixel and the green sub-pixel, but the invention is not limited thereto. In other embodiments, blue and yellow sub-pixels may be disposed in a first column of the

pixel groups

20 and 22, and red and green sub-pixels may be disposed in a second column of the

pixel groups

20 and 22.

Compared with the prior art, the method reduces the number of the sub-pixels of each pixel from three to two, reduces the area of pixel layout, and accordingly improves the image resolution during display. In addition, experimental data show that when power consumption tests are performed on four display panels (RGBY 1, RGBY2, RGBY3 and RGBY4, respectively) having the pixel arrangement of the present invention, the average power consumption of RGBY1 is 276mW, the average power consumption of RGBY2 is 273mW, the average power consumption of RGBY3 is 268mW, and the average power consumption of RGBY4 is 269mW, and the power consumption can be saved by about 15% to 18% compared with the power consumption of 326mW of the display panel having the conventional three primary color pixel arrangement.

Fig. 4 is a schematic manufacturing flow diagram of a pixel arrangement of the display panel in fig. 1. As is well known, an OLED (Organic Light-emitting Diode), herein called an Organic Light-emitting Diode, is a Light-emitting Diode based on Organic semiconductor materials. The OLED has the advantages of all solid state, active light emitting, high contrast, ultra-thin, low power consumption, no visual angle limitation, high response speed, wide working temperature range, easiness in realizing flexibility, large area, low power consumption and the like, and can be used as a display device. In order to obtain an OLED with higher performance, an organic semiconductor Layer is generally additionally provided with a plurality of layers such as a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Emitting Material Layer (EML), an Electron Transport Layer (ETL), and an Electron Injection Layer (EIL) between a cathode and an anode thereof.

In the manufacturing process of the pixel arrangement of the present invention, the deposition sequence of the above layers may be sequentially expressed as a common HIL/HTL, an HTL (G-HTL) for a green OLED, an HTL (Y-HTL) for a yellow OLED, an HTL (R-HTL) for a red OLED, a common Electron Blocking Layer (EBL), an EML (G-EML) for a green OLED, an EML (Y-EML) for a yellow OLED, an EML (R-EML) for a red OLED, an EML (B-EML) for a blue OLED, and a common ETL/cathode.

Fig. 5 (a) to 5 (c) show schematic shapes of sub-pixels in the pixel arrangement of fig. 1 or 3, respectively. As shown, the shape of the sub-pixel R/B/G/Y may include a variety, such as a rectangle, a regular hexagon, or a diamond. Similarly, the central connecting lines of the adjacent sub-pixels R, B, G and Y also form a non-rectangular parallelogram.

Fig. 6 is a schematic structural view illustrating a display device according to still another embodiment of the present invention. Referring to fig. 6, the display device of the present invention at least includes a sub-pixel display circuit 60, a display panel 62 and a driving circuit 64. The display panel, and particularly the pixel arrangement of the display panel, has been described in detail in the foregoing, and for convenience, the description is omitted here.

The sub-pixel display circuit 60 is used for outputting a first color data, a second color data, a third color data and a fourth color data, respectively. For example, the sub-pixel display circuit 60 outputs two paths of color data, one of which is data of a yellow sub-pixel and data of a green sub-pixel, in accordance with the position of the sub-pixel in the pixel arrangement, and performs serial output in accordance with their column order. The other path is data of the blue sub-pixel and data of the red sub-pixel, and serial output is carried out according to the column sequence of the blue sub-pixel and the red sub-pixel.

The driving circuit 64 is electrically coupled to the sub-pixel display circuit 60 and the display panel 62, and is configured to convert the received first color data, second color data, third color data and fourth color data into a first pixel voltage, a second pixel voltage, a third pixel voltage and a fourth pixel voltage, respectively, so as to correspondingly control four different sub-pixels. In a specific embodiment, the driving circuit 64 may further include a first driver 641 and a second driver 643. The first driver 641 is configured to provide pixel voltages for driving and controlling the yellow and green sub-pixels, and the second driver 643 is configured to provide pixel voltages for driving and controlling the blue and red sub-pixels.

Hereinbefore, specific embodiments of the present invention are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present invention without departing from the spirit and scope of the invention. Such modifications and substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. A display panel is provided with a pixel array, which is characterized in that the pixel array of the display panel comprises a plurality of pixel units, each pixel unit is composed of 8 sub-pixels including two first sub-pixels, two second sub-pixels, two third sub-pixels and two fourth sub-pixels,

any two adjacent sub-pixels are different in color, and the central connecting lines of the first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel which are adjacent form a non-rectangular parallelogram.

2. The display panel according to claim 1, wherein the pixel unit is divided into four columns, a first column and a third column sequentially set the first sub-pixel and the second sub-pixel, a second column and a fourth column sequentially set the third sub-pixel and the fourth sub-pixel, and two adjacent columns are arranged in a staggered manner.

3. The display panel according to claim 1, wherein the pixel unit is divided into four columns, the first sub-pixel and the second sub-pixel are located in a first column and a third column and arranged in an opposite order, the third sub-pixel and the fourth sub-pixel are located in a second column and a fourth column and arranged in an opposite order, and two adjacent columns are arranged in a staggered manner.

4. The display panel according to claim 1, wherein the pixel unit is divided into four columns, the first sub-pixel and the fourth sub-pixel are located in a first column and a third column and arranged in an opposite order, the second sub-pixel and the third sub-pixel are located in a second column and a fourth column and arranged in an opposite order, and two adjacent columns are arranged in a staggered manner.

5. A display panel having a pixel array, wherein the pixel array of the display panel at least comprises a first pixel group and a second pixel group, and the first pixel group and the second pixel group have four sub-pixels with different colors,

the first sub-pixel and the second sub-pixel in the first pixel group are arranged in a first row, and the third sub-pixel and the fourth sub-pixel are arranged in a second row;

the first sub-pixels and the second sub-pixels in the second pixel group are arranged in a third row, the third sub-pixels and the fourth sub-pixels are arranged in a fourth row, any two adjacent rows are arranged in a staggered manner,

6. The display panel according to claim 5, wherein the first sub-pixel and the second sub-pixel are arranged in an opposite order in a first column and a third column, and the third sub-pixel and the fourth sub-pixel are arranged in an opposite order in a second column and a fourth column.

7. The display panel according to claim 6, wherein the first to fourth sub-pixels are a blue sub-pixel, a red sub-pixel, a yellow sub-pixel and a green sub-pixel, respectively.

8. The display panel according to claim 6, wherein the first to fourth sub-pixels are a blue sub-pixel, a yellow sub-pixel, a red sub-pixel and a green sub-pixel, respectively.

9. The display panel according to any one of claims 1 to 8, wherein the first to fourth subpixels have a rectangular, regular hexagonal, or rhombic shape.

10. A display device, characterized in that the display device comprises:

a display panel according to any one of claims 1 to 8;