CN110687726A - Special-shaped display panel and display device - Google Patents

Abstract

The invention provides a special-shaped display panel and a display device, and relates to the technical field of display panels, wherein the special-shaped display panel comprises: the display device comprises a main display area and a secondary display area at the edge of the main display area, wherein the main display area is provided with a plurality of first pixel units which are repeatedly arranged, the secondary display area is provided with a plurality of second pixel units which are repeatedly arranged, and the sub-pixel units of the first pixel units and the sub-pixel units of the second pixel units have the same width; the sub-pixel units of the first pixel unit and the second pixel unit respectively comprise a pixel shielding layer positioned at the edge of the sub-pixel unit, a plurality of pixel electrodes arranged at intervals and a pixel electrode slit positioned between two adjacent pixel electrodes; the width of the pixel electrode slit of the sub-pixel unit of the second pixel unit is larger than that of the pixel electrode slit of the sub-pixel unit of the first pixel unit; the width of the pixel electrode of the sub-pixel unit of the second pixel unit is smaller than that of the pixel electrode of the sub-pixel unit of the first pixel unit.

Description

A special-shaped display panel and display device

technical field

The invention belongs to the technical field of display panels, and in particular relates to a special-shaped display panel and a display device.

technical background

The main difference between the special-shaped display panel and the conventional display panel is that its display area is no longer a single rectangular structure. In watch and vehicle applications, the panel display area will be required to present special shapes such as circles, arcs, and diamonds. The pixel units in the display panel are mostly rectangular or other relatively regular structures. Therefore, when the pixel unit of this structure is applied to a special-shaped display panel, there will be problems at the edge of the display panel where the pixel unit and the display panel boundary cannot be completely fitted. Happening. At this time, if the integrity of the RGB pixel unit is maintained, the edge of the special-shaped display panel will appear microscopically obvious jaggedness, which may lead to a sense of jaggedness visible to the naked eye; if incomplete RGB pixels are used on the edge of the display panel The cell structure will improve the jaggedness, but also cause color cast problems in the edge areas.

As shown in FIG. 1 is a schematic structural diagram of an existing sub-pixel unit 100. At the boundary of the special-shaped display panel, if the existing pixel unit structure is maintained, without changing the pixel shielding layer (Pixel BM), the special-shaped The edge of the display panel may appear jagged as shown in FIG. 2 (the area shown by the dotted line 200 in FIG. 2 ). If the pixel blocking layer is changed according to the edge of the special-shaped display panel, the RGB transmittance in a pixel unit will be inconsistent and serious color shift will occur, as shown in the area marked 300 in FIG. 3 .

In order to improve the zigzag problem of the special-shaped display panel, there are the following technical solutions in the prior art: one is to use a special shading structure to improve the zigzag display, as shown in Figure 4, but the aperture ratio of the surrounding pixels is significantly reduced in this method , the screen pixel density (PPI) is reduced in disguise, and the bar-shaped shading structure may lead to display dark lines; the other is to use a special pixel size/gap to improve the jagged display, as shown in Figure 5, but this method is changing the pixel The gap will also reduce the PPI of the screen, and the special pixel size will lead to changes in the circuit; another is to use a special circuit to improve the jagged display, that is, through a special circuit, the pixels in the edge display area of the special-shaped display device are applied differently. operating voltage to reduce the brightness of the pixels at the edge, but this method is less operable.

SUMMARY OF THE INVENTION

The present invention provides a special-shaped display panel and a display device. The special-shaped display panel and the display device process the effective area of the common electrode and the pixel electrode in the pixel to weaken the fringing electric field (intensity, range) to reduce the transmittance of the pixel , to optimize the jagged edge of the special-shaped display panel.

The technical scheme of the present invention is as follows:

The invention discloses a special-shaped display panel, comprising: a main display area and a sub-display area located at the edge of the main display area, the main display area has a plurality of first pixel units arranged repeatedly, and the sub-display area has A plurality of second pixel units arranged repeatedly, characterized in that the sub-pixel units of the first pixel unit and the sub-pixel units of the second pixel unit have the same width; the sub-pixel units of the first pixel unit and the second pixel unit have the same width; The sub-pixel units of the pixel unit all include a pixel shielding layer located at the edge of the sub-pixel unit, a plurality of pixel electrodes located in the sub-pixel unit and arranged at intervals, and a pixel electrode slit located between two adjacent pixel electrodes;

Wherein, the width of the pixel electrode slit of the sub-pixel unit of the second pixel unit is larger than the width of the pixel electrode slit of the sub-pixel unit of the first pixel unit; the width of the pixel electrode of the sub-pixel unit of the second pixel unit is smaller than that of the first pixel unit. The width of the pixel electrode of the sub-pixel unit of the pixel unit.

Preferably, both the first pixel unit and the second pixel unit have m (m=3 or 4) sub-pixel units.

Preferably, the number of pixel electrode slits in each sub-pixel unit is three.

Preferably, the second pixel unit in the secondary display area is composed of multiple groups of sub-pixel units with gradual changes, and different sub-pixel units have pixel electrode slits and pixel electrodes of different widths.

Preferably, the widths of the pixel electrode slits of the sub-pixel units from the inside to the outside in the sub-display area show an increasing trend, and the width of the pixel electrodes show a decreasing trend.

Preferably, there are at least three types of sub-pixels in each row of sub-pixels in the sub-display area.

The present invention also discloses a liquid crystal display device, the liquid crystal display device includes any of the aforementioned special-shaped display panels.

The present invention can bring the following beneficial effects:

In the present invention, under the condition that the width of the sub-pixel unit of the second pixel unit is consistent with the width of the sub-pixel unit of the first pixel unit, only by adjusting the width of the pixel electrode slit of the sub-pixel unit in the second pixel unit and the width of the pixel electrode The width of the edge electric field in the display area is weakened, thereby reducing the driving ability of the liquid crystal molecules, so as to achieve the purpose of weakening the display effect at the edge of the panel.

Description of drawings

The present invention will be further described below by describing preferred embodiments in a clear and easy-to-understand manner with reference to the accompanying drawings.

1 is a schematic diagram of a sub-pixel unit in the prior art;

2 is a schematic diagram of a jagged edge of a special-shaped display panel in the prior art;

3 is a schematic diagram of edge color shift of a special-shaped display panel in the prior art;

4 is a schematic diagram of the prior art using a special shading structure to improve the jagged display;

Fig. 5 is the schematic diagram that adopts special pixel size/gap to improve jagged display in the prior art;

6 is a schematic cross-sectional view of a sub-pixel unit of the present invention;

7 is a top view of a sub-pixel unit of the present invention;

8 is a schematic diagram of the distribution of edge sub-pixel units of a special-shaped display panel according to the present invention;

9 is a schematic diagram of the pixel electrode slit width and the pixel electrode width of the normal sub-pixel unit Pixel Normal and the sub-pixel units Pixel1-Pixel5 of the present invention;

Fig. 10 is the variation table of transmittance under the driving voltage of 0-5V of different sub-pixel units of the present invention;

FIG. 11 is a display comparison diagram of the edge of the panel before and after the improvement of the present invention.

Detailed ways

In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts, and obtain other implementations.

In order to keep the drawings concise, the drawings only schematically show the parts related to the present invention, and they do not represent its actual structure as a product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. As used herein, "one" not only means "only one", but also "more than one".

The technical solutions of the present invention are described in detail below with specific embodiments.

The present invention provides a special-shaped display panel, comprising: a main display area and a sub-display area located at the edge of the main display area, the main display area has a plurality of first pixel units arranged repeatedly, and the sub-display area has a plurality of first pixel units. a repeating arrangement of second pixel units. Both the first pixel unit and the second pixel unit have m (m=3 or 4) sub-pixel units; the sub-pixel units of the first pixel unit and the sub-pixel units of the second pixel unit have the same width.

FIG. 6 is a schematic cross-sectional view of the sub-pixel unit, and FIG. 7 is a top view of the sub-pixel unit. As shown in FIGS. 6 and 7 , each sub-pixel unit includes a common electrode 10, a plurality of pixels located in the sub-pixel unit and arranged at intervals The electrode 20, the spacer layer 30 separated between the common electrode 10 and the pixel electrode 20, the liquid crystal layer 40, the pixel shielding layer (Pixel BM) 50 located between two adjacent sub-pixel units, and two adjacent pixel electrodes Pixel electrode slits (Slit) 21 between 20. An electric field 50 for driving the liquid crystal layer 40 is generated between the common electrode 10 and the pixel electrode 20 . Pixel Electrode Pixel Electrode Among them, the number of pixel electrode slits in the sub-pixel unit is multiple, which can be determined according to the size of the specific sub-pixel unit. All are 3.

The following are specific embodiments of the present invention:

Define the width of the pixel electrode slit 21 as W, the width of the pixel electrode 20 (ie the distance between two adjacent pixel electrode slits 21) as S, then the pixel electrode slit of the sub-pixel unit of the first pixel unit has a width of S. The width is W1, the width of the pixel electrode slit of the sub-pixel unit of the second pixel unit is W2; the width of the pixel electrode of the sub-pixel unit of the first pixel unit is S1, and the width of the pixel electrode of the sub-pixel unit of the second pixel unit is S1. The width is S2.

The width W2 of the pixel electrode slit of the sub-pixel unit of the second pixel unit is greater than the width W1 of the pixel electrode slit of the sub-pixel unit of the first pixel unit; the width S2 of the pixel electrode of the sub-pixel unit of the second pixel unit It is smaller than the width S1 of the pixel electrode of the sub-pixel unit of the first pixel unit.

In this embodiment, the second pixel unit in the secondary display area may be composed of multiple groups of sub-pixel units with gradual changes, that is, different sub-pixel units in the second pixel unit have pixel electrode slits and pixels with different widths Electrodes, these different sub-pixel units are combined to form different second pixel units according to the specific display requirements of the edge of the display panel. These gradient second pixel units can present multiple sets of gradient gray scales under the same voltage, which can well optimize the jagged display.

FIG. 8 is a schematic diagram showing the distribution of sub-pixel units at the edge of a special-shaped display panel. The first pixel unit is located in the main display area, and the second pixel unit is located in the sub-display area. The first pixel unit is composed of normal sub-pixel units PixelNormal, and the second pixel unit is composed of multiple groups of gradient sub-pixel units (illustrated as Pixel1-Pixel5 in FIG. 8). The sub-pixel units Pixel1-Pixel5 shown in the figure are respectively Sub-pixel units with different pixel electrode slit widths and pixel electrode widths.

In the sub-display area, the pixel electrode slit widths 21 and the widths of the pixel electrodes 20 of multiple groups of gradual sub-pixel units can vary in various ways, and in the sub-display area, the pixel electrodes of the sub-pixel units from the inside to the outside The width of the slit 21 shows an increasing trend, the width of the pixel electrode 20 shows a decreasing trend, and the final visual effect is that the brightness gradually decreases. In this embodiment, it can be any combination of sub-pixel units Pixel1-Pixel5. Considering that the sub-display area has a certain width from the inside to the outside and must be a complete pixel unit, each row of sub-pixels in the sub-display area is gradually changed. The unit has at least three sub-pixel units.

9 is a schematic diagram of the width of the slits of the pixel electrodes 21 of the normal sub-pixel unit Pixel Normal and the sub-pixel units Pixel1-Pixel5 and the width of the pixel electrodes 20 in this embodiment, wherein the slits of the pixel electrodes 21 of the normal sub-pixel unit PixelNormal The width W and the width S of the pixel electrode 20 are 2.9 μm and 2.7 μm respectively, the slit width W21 of the pixel electrode 21 of the sub-pixel unit Pixel1 and the width S21 of the pixel electrode 20 are 3.1 μm and 2.5 μm respectively; The slit width of the pixel electrode 21 and the width of the pixel electrode 20 are 3.3 μm and 2.3 μm respectively; the slit width of the pixel electrode 21 of the sub-pixel unit Pixel3 and the width of the pixel electrode 20 are 3.5 μm and 2.1 μm respectively; the sub-pixel unit The slit width of the pixel electrode 21 and the width of the pixel electrode 20 of Pixel4 are 3.7 μm and 1.9 μm respectively; the width of the pixel electrode slit 21 and the width of the pixel electrode 20 of the sub-pixel unit Pixel5 are 3.9 μm and 1.7 μm respectively. The widths of the slits of the pixel electrodes 21 of the normal sub-pixel unit Pixel Normal and the sub-pixel units Pixel1 to Pixel5 are gradually increasing, and the widths of the pixel electrodes 20 are gradually decreasing. It should be noted that this embodiment only proposes a value of the slit width of the pixel electrode 21 and the width of the pixel electrode 20 of the sub-pixel units Pixel1-Pixel5, and other value possibilities are all within the protection of the present invention within the range.

10 is a table showing the change of transmittance of different sub-pixel units under the driving voltage of 0-5V. The figure shows that under the same voltage, due to the width of the pixel electrode slit 21 of the sub-pixel unit and the Different widths result in different transmittances, so that different sub-pixel units can form different gray scales (gray scales), which is conducive to the weakened display of the edge of the display panel and the reduction of jaggedness.

The present invention also discloses a liquid crystal display device, which comprises the above-mentioned special-shaped display panel.

11 is a display comparison diagram of the edge of the panel before and after the improvement of the present invention. The present invention does not change the width of the sub-pixel unit of the second pixel unit, but compares the width of the sub-pixel unit of the second pixel unit with the width of the first pixel unit. The widths of the sub-pixel units in the second pixel unit are kept the same. The present invention only adjusts the width of the pixel electrode slit 21 and the width of the pixel electrode 20 of the sub-pixel unit in the second pixel unit, so that the fringing electric field strength of the display area is weakened, thereby reducing the liquid crystal molecules. Driving ability to achieve the purpose of weakening the display effect at the edge of the panel.

It should be noted that the above descriptions are only the preferred embodiments of the present invention, but the present invention is not limited to the specific details of the above-mentioned embodiments. Within the scope of the concept, without departing from the principle of the present invention, several improvements and modifications can also be made to carry out various equivalent transformations to the technical solutions of the present invention. These improvements, modifications and equivalent transformations should also be regarded as the protection scope of the present invention. .

Claims (7)

1. A special-shaped display panel, comprising: A main display area and a sub-display area located at the edge of the main display area, the main display area has a plurality of first pixel units arranged repeatedly, and the sub-display area has a plurality of second pixel units arranged repeatedly, characterized in that In that, the sub-pixel unit of the first pixel unit and the sub-pixel unit of the second pixel unit have the same width; a pixel shielding layer, a plurality of pixel electrodes located in the sub-pixel unit and arranged at intervals, and a pixel electrode slit located between two adjacent pixel electrodes; The width of the pixel electrode slit of the sub-pixel unit of the second pixel unit is larger than the width of the pixel electrode slit of the sub-pixel unit of the first pixel unit; the width of the pixel electrode of the sub-pixel unit of the second pixel unit is smaller than that of the first pixel unit. The width of the pixel electrode of the sub-pixel unit of the pixel unit. 2 . The special-shaped display panel according to claim 1 , wherein the first pixel unit and the second pixel unit both have m (m=3 or 4) sub-pixel units. 3 . 3 . The special-shaped display panel according to claim 1 , wherein the number of pixel electrode slits in each sub-pixel unit is three. 4 . 4 . The special-shaped display panel according to claim 1 , wherein the second pixel unit of the sub-display area is composed of multiple groups of sub-pixel units with gradual changes, and different sub-pixel units have pixel electrodes with different widths. slits and pixel electrodes. 5 . The special-shaped display panel according to claim 4 , wherein the widths of the pixel electrode slits of the sub-pixel units from the inside to the outside in the sub-display area show an increasing trend, and the width of the pixel electrodes show a decreasing trend. 6 . 6 . The special-shaped display panel according to claim 5 , wherein there are at least three types of sub-pixels in each row of gradient sub-pixels in the sub-display area. 7 . 7. A liquid crystal display device, characterized in that, the liquid crystal display device comprises the special-shaped display panel according to any one of claims 1-6.

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