CN109192076B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109192076B CN109192076B CN201811303421.6A CN201811303421A CN109192076B CN 109192076 B CN109192076 B CN 109192076B CN 201811303421 A CN201811303421 A CN 201811303421A CN 109192076 B CN109192076 B CN 109192076B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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Abstract
The embodiment of the invention discloses a display panel and a display device. The display panel includes: a display area and a transparent display area; the transparent display area comprises a plurality of sub-pixels and a transparent area, and anode electrodes of at least two sub-pixels with the same color are connected. The embodiment of the invention solves the problem that the brightness difference exists in the display panel because the transparent display area is compatible with the transparent function and the display function in the existing full-screen display panel.
Description
Technical Field
The present disclosure relates to but not limited to the field of display technologies, and particularly to a display panel and a display device.
Background
With the rapid development of display technology, full-screen display has become the development trend of mobile display devices such as mobile phones.
In order to realize a full-screen display and also consider a front camera, a display area with a low PPI and a partially transparent display area is disposed in the display panel in the prior art, and the display area may be referred to as: a transparent display area or a weak display area. Because the transparent display region has both transparent and display functions, the PPI in the transparent display region is low, and the display brightness of the region is reduced, so that the transparent display region has a significant brightness difference from the surrounding normal display region.
Disclosure of Invention
In order to solve the above technical problem, embodiments of the present invention provide a display panel and a display device, so as to solve the problem of brightness difference in the display panel due to the fact that a transparent display area is compatible with two functions of transparent and display in the existing full-screen display panel.
An embodiment of the present invention provides a display panel, including: a display area and a transparent display area;
the transparent display area comprises a plurality of sub-pixels and a transparent area, and anode electrodes of at least two sub-pixels with the same color are connected.
Optionally, in the display panel as described above, the sub-pixels in the transparent display region include a first sub-pixel provided with a driving thin film transistor TFT and a second sub-pixel not provided with a driving TFT;
the at least two same-color sub-pixels connected with the anode electrode comprise a first sub-pixel and at least one second sub-pixel.
Optionally, in the display panel as described above, the sub-pixels include at least three colors, the transparent display region is divided into a plurality of pixel units arranged in an array, and each pixel unit includes one first sub-pixel of each color and at least one second sub-pixel of each color; in each pixel unit, the anode electrode of the first sub-pixel of each color is respectively connected with the anode electrode of at least one second sub-pixel of the same color.
Alternatively, in the display panel as described above,
and the driving TFT is used for driving the first sub-pixel provided with the TFT and the second sub-pixel connected with the anode electrode of the first sub-pixel to be switched on and off.
Optionally, in the display panel as described above, the at least two same-color sub-pixels to which the anode electrodes are connected are sub-pixels in adjacent positions.
Optionally, in the display panel as described above, the anode electrode is connected to at least two sub-pixels of the same color, and the sub-pixels are configured to be turned on or off simultaneously during a scanning process of the display panel.
Optionally, in the display panel as described above, at least two sub-pixels of the same color to which the anode electrodes are connected are located in different sub-pixel rows of the display panel.
Optionally, in the display panel as described above, the transparent display region has a rectangular or circular shape.
An embodiment of the present invention further provides a display device, including: the display panel is arranged on one side, away from the light emitting surface, of the display panel, and the camera module is arranged in an orthographic projection area of the transparent display area;
the camera module is used for shooting images through the transparent area in the transparent display area while the display panel displays the images.
According to the display panel and the display device provided by the embodiment of the invention, the display panel comprises the display area and the transparent display area, the transparent display area comprises a plurality of sub-pixels and the transparent area, and the anode electrodes of at least two sub-pixels with the same color in the transparent display area are connected, so that the display panel can simultaneously start the plurality of sub-pixels with the same color, which are connected with the anode electrodes in the transparent display area, in the scanning process, and the display brightness of the transparent display area can be effectively improved. According to the display panel provided by the invention, the anode electrodes of the sub-pixels in the transparent display area are reasonably configured, so that the problem of brightness difference in the display panel caused by the fact that the transparent display area is compatible with two functions of transparency and display in the existing full-face screen display panel is solved. In addition, the embodiment of the invention can effectively improve the light emitting area of the transparent display area under the condition of not changing the PDL and FMM opening areas, thereby avoiding the adverse effect on the opening area in the conventional display area caused by increasing the PDL and FMM opening areas in the transparent display area.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic diagram illustrating a positional relationship between a display panel and a camera in a conventional display device;
FIG. 2 is a schematic diagram of a position relationship between a display panel and a camera in a conventional display device;
FIG. 3 is a schematic diagram of a position relationship between a display panel and a camera in a conventional display device;
fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a transparent display area in a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another transparent display area in the display panel according to the embodiment of the present invention;
FIG. 7 is a schematic diagram of pixel density of a transparent display region in a conventional display panel;
FIG. 8 is a schematic structural diagram of another transparent display area in the display panel according to the embodiment of the invention;
fig. 9 is a flowchart of a method for manufacturing a display panel according to an embodiment of the invention;
FIG. 10 is a flowchart illustrating a method for fabricating a display panel according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The following specific embodiments of the present invention may be combined, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 1 shows a relative position between a display panel and a camera in a conventional display device, such as a mobile phone, which is a schematic diagram of a positional relationship between a display panel and a camera in a conventional display device. The camera 120 of the display device 100 shown in fig. 1 is located at the periphery of the display panel 110, and does not occupy the space of the display panel 110, however, the display device 100 with the structure shown in fig. 1 generally has a region dedicated to the placement of the camera 120, so that the periphery of the display device 100 has a wider frame.
With the development and progress of display technology, the ratio of displayable area in the display panel is increased, as shown in fig. 2, which is a schematic diagram of a position relationship between another display panel and a camera in the conventional display device. It can be seen that the display panel 210 of the display device 200 shown in fig. 2 has an opening therein, i.e., a non-display region 230 disposed inside the display panel 210, and the camera 220 disposed on the backlight side of the display panel 200 overlaps with a front projection region of the non-display region 230. Although the display device 200 shown in fig. 2 can improve the ratio of the light-emitting area in the display panel 210 to some extent, the camera 220 is disposed through the opening inside the display panel 210, and the display effect of the full-screen display cannot be achieved.
Fig. 3 is a schematic diagram of a position relationship between a display panel and a camera in a conventional display device. The entire screen of the display device 300 shown in fig. 3 is a display panel 310, that is, the display panel 310 is a full-screen display panel, the camera 320 of the display device 300 is disposed on a side of the display panel 310 away from the light emitting surface, a region of the display panel 310 overlapping with a negative projection region of the camera 320 is a transparent display region 330 (or referred to as a weak display region), and the other region of the display panel 310 is a normal display region 310 a. Although the display device 300 shown in fig. 3 can achieve the effect of full-screen display, the transparent display region 330 should have both transparent and display functions, so that the PPI in the transparent display region 330 is low, the display brightness of the region is reduced, and thus, the transparent display region 330 and the peripheral normal display region 310a have a significant brightness difference.
In view of the above-mentioned brightness difference between the transparent display region 330 and the peripheral normal display region 310a in the display apparatus 300 shown in fig. 3, an improvement method has been proposed in the prior art, in which the effective light emitting area in the transparent display region 330 is increased by increasing the opening area of a Pixel Definition Layer (PDL) and a high-precision Metal Mask (FMM) in the transparent display region 330, so as to increase the display brightness.
In the above method, since the requirement for the manufacturing accuracy of the FMM is high, when the opening area of a certain region is increased, the manufacturing accuracy of the original normal opening area may be affected. Therefore, in the above scheme of increasing the display brightness of the transparent display region 330 by increasing the PDL and the FMM opening area in the transparent display region 330, the manufacturing process is difficult, the cost rate of the display panel is reduced, and the manufacturing cost is increased accordingly.
Fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 5 is a schematic structural diagram of a transparent display area in the display panel according to the embodiment of the present invention. The display panel 400 provided in this embodiment may include: a display area 410 and a transparent display area 420.
The transparent display region 420 includes a plurality of sub-pixels 430 and a transparent region 440, and the anode electrodes 430a of at least two sub-pixels 430 with the same color are connected;
the display panel 400 provided by the embodiment of the invention can simultaneously turn on a plurality of same-color sub-pixels 430 connected with the anode electrodes 430a in the transparent display area 420 during scanning.
Fig. 4 illustrates the overall structure of the display panel 400, fig. 5 illustrates a top view of the transparent display region 420 in the display panel 400, and fig. 5 illustrates only the sub-pixels 430 in the transparent display region 420 and the related structure. The display panel 400 provided by the embodiment of the invention is a full-screen display panel, and reference may be made to the cross section of the display panel 310 in fig. 3. The Display panel 400 of the embodiment of the invention is a self-luminous Display panel, and may be, for example, an Organic electroluminescent Display (OLED) panel, a micro Light Emitting Diode (micro LED) panel, or another type of Display panel capable of realizing self-luminous. In addition, as shown in fig. 5, the transparent regions 440 in the transparent display region 420 may be disposed at intervals between the plurality of sub-pixels 430, that is, the sub-pixels 430 for implementing the display effect and the transparent regions 440 for implementing the transparent effect of the transparent display region 420 may be uniformly disposed.
In the normal display area 410 of the display panel 400 in the prior art or the embodiment of the invention, one pixel generally includes a plurality of sub-pixels with different colors, and each sub-pixel in each pixel has an independent anode electrode, and the display panel turns on the sub-pixels in each row in turn, for example, when scanning is performed. The transparent display region 330 of the conventional display panel 310 shown in fig. 3 adopts the same scanning manner as described above, and since the PPI of the transparent display region 330 is significantly smaller than the PPI of the display region 310a of the display panel 310, a significant brightness difference exists between the transparent display region 330 of the display panel 310 and the display region 310a, which affects the display effect of the display panel.
In the display panel 400 provided in the embodiment of the present invention, the transparent display region 420 also needs to be compatible with display and transparency functions, and in order to solve the problem of brightness difference between the transparent display region and the display region in the conventional display panel and avoid the influence of increasing the PDL and the FMM opening area of the transparent display region on the opening area in the conventional display region in the conventional scheme, the anode electrodes 430a of the sub-pixels 430 in the transparent display region 420 are connected, so that the anode electrodes 430a of the sub-pixels 430 in the transparent display region 420 are no longer independent, but the anode electrodes 430a of the sub-pixels 430 in the same color are connected with each other. In practical applications, the at least two sub-pixels 430 of the same color connected by the anode electrode 430a may be sub-pixels 430 in adjacent positions, which is beneficial to the preparation of the anode trace in the process of manufacturing the anode electrode 430 a.
Based on the connection relationship of the anode electrodes 430a of the sub-pixels 430 with the same color in the transparent display area 420, in the scanning process of the display panel 400 according to the embodiment of the present invention, the scanning manner of the display area 410 may be a conventional scanning manner, for example, progressive scanning, and the scanning manner of the transparent display area 420 is: at least two same-color sub-pixels 430 connected by the anode electrode 430a are simultaneously turned on or simultaneously turned off.
For example, as shown in fig. 5, in the transparent display area 420, the anode electrodes 430a of three sub-pixels 430 with the same color and adjacent positions are connected by metal routing, when the display device 400 scans the transparent display area 420, the sub-pixels 430 connected to the three anode electrodes 430a are simultaneously turned on, and it can be seen that the three sub-pixels 430 connected to the anode electrodes 430a shown in fig. 5 are located in different scanning lines (i.e., sub-pixel rows), for example, when a first row is scanned, only the sub-pixels in the first row in the display area 410 are turned on, and in the transparent display area 420, the sub-pixels 430 in the first row, the second row and the third row are substantially turned on, so that the display brightness of the transparent display area 420 can be increased, and the brightness difference between the transparent display area 420 and the display area 410 can be improved. Therefore, the embodiment of the invention can effectively improve the light-emitting area of the transparent display region 420 without changing the PDL and the FMM opening area, thereby achieving the purpose of improving the overall brightness in the transparent display region 420. In addition, in the embodiment of the present invention, the process of connecting the anode electrodes 430a of the sub-pixels 430 with the same color is easy to implement, and can be implemented only by changing the mask of the anode electrode 430a, so that the manufacturing cost is low and the yield is high.
It should be noted that, in the transparent display area 420 shown in fig. 5, the anode electrodes 430a of the three sub-pixels 430 with the same color are connected as an example, and the number of the sub-pixels 430 connected by the anode electrodes 430a is not limited in the embodiment of the present invention, and may be two, four or more. In addition, the three sub-pixels 430 connected to the anode electrode 430a may be located in the same scan line, and this arrangement may also improve the display brightness of the transparent display region 420, but the display effect may be different, and there may be bright and dark stripes, or the display effect is better if the three sub-pixels 430 connected to the anode electrode 430a are located in different scan lines (i.e., sub-pixel lines).
The display panel 400 provided by the embodiment of the invention comprises a display area 410 and a transparent display area 420, wherein the transparent display area 420 comprises a plurality of sub-pixels 430 and a transparent area 440, and the anode electrodes 430a of at least two sub-pixels 430 with the same color in the transparent display area 420 are connected, so that the display panel can simultaneously start the plurality of sub-pixels 430 with the same color, which are connected with the anode electrodes 430a in the transparent display area 420, in the scanning process, and the display brightness of the transparent display area 420 can be effectively improved. According to the display panel 400 provided by the invention, the anode electrodes 430a of the sub-pixels 430 in the transparent display area 420 are reasonably configured, so that the problem of brightness difference in the display panel due to the fact that the transparent display area is compatible with the two functions of transparency and display in the existing full-screen display panel is solved. In addition, the embodiment of the invention can effectively improve the light emitting area of the transparent display region 420 under the condition of not changing the PDL and FMM opening areas, thereby avoiding the adverse effect on the opening area in the conventional display region caused by increasing the PDL and FMM opening areas in the transparent display region, and the process mode of configuring the anode electrode 430a in the embodiment of the invention is easy to realize, thereby being beneficial to reducing the manufacturing cost and improving the yield.
Optionally, fig. 6 is a schematic structural diagram of another transparent display region in the display panel according to the embodiment of the present invention, in the display panel 400 according to the embodiment of the present invention, the sub-pixels in the transparent display region 420 include a first sub-pixel 431 provided with a driving Thin Film Transistor (TFT) and a second sub-pixel 432 not provided with a driving TFT (the TFT array layer and the driving TFT are not illustrated in fig. 6, and only 431 and 432 indicate which sub-pixels are the sub-pixels provided with the driving TFT or not provided with the driving TFT); in addition, the at least two same-color sub-pixels 430 connected to the anode electrode 430a include a first sub-pixel 431 and at least a second sub-pixel 432. It should be noted that, as shown in fig. 6, the anode electrodes 430a of the three same-color sub-pixels 430 are connected as an example, and fig. 6 illustrates that only one of the three anode electrodes 430a connected sub-pixels 430 is a first sub-pixel 431 provided with a driving TFT, and the other two sub-pixels are second sub-pixels 432 not provided with a driving TFT, that is, the plurality of same-color sub-pixels 430 connected by the anode electrodes 430a are driven by the same group of driving TFTs.
Generally, the on and off of the sub-pixels in the display panel during the scanning process are controlled by the driving TFTs corresponding to the sub-pixels one by one, that is, in the conventional display panel, each sub-pixel is connected to a group of driving TFTs, so that the number of the driving TFTs is the same as that of the sub-pixels, and a group of driving TFTs generally includes a plurality of TFT transistors (for example, 6 or 7), and the driving TFTs need to avoid the light emitting region and a part of the transparent region of each sub-pixel when designing the TFT array layer. As shown in fig. 7, which is a schematic diagram of the pixel density of a transparent display region in a conventional display panel, it can be seen that the density of sub-pixels 331 in the transparent display region 330 is very low due to the area occupied by the circuit of the driving TFT.
In contrast, the display panel 400 according to the embodiment of the invention connects the anode electrodes 430a of the sub-pixels 430 of the same color in the transparent display region 420, and, of the plurality of sub-pixels 430 to which the anode electrodes 430a are connected, only one sub-pixel is the first sub-pixel 431 provided with the driving TFT, the other second sub-pixels 432 connected to the anode electrode 430a of the first sub-pixel 431 are not provided with a driving TFT, but share a set of driving TFTs with the first sub-pixel 431, that is, a plurality of same-color sub-pixels 430 (including a first sub-pixel 431 and at least a second sub-pixel 432) are controlled to be simultaneously turned on by a group of driving TFTs, and therefore, the driving TFTs in the embodiment of the present invention, for driving the first subpixel 431 provided with the driving TFT and the second subpixel 432 connected to the anode electrode 430a of the first subpixel 431 to be turned on and off; accordingly, the structure of the transparent display region 420 can reduce the circuit occupied area of the TFT transistors in the TFT array layer, i.e., reduce the metal shading area, thereby increasing the transmittance of the sub-pixels 430 and further improving the display brightness of the transparent display region 420. Comparing the pixel density of the transparent display region 420 in the display panel 400 shown in fig. 5 and 6 with the pixel density of the transparent display region in the prior art shown in fig. 7, it can be seen that the density of the sub-pixels 430 in the transparent display region 420 is increased after the number of the driving TFTs is significantly reduced, and the display brightness of the transparent display region 420 is not affected by the increase of the PPI in the transparent display region 420 due to the increase of the number of the sub-pixels 430 that are lit up during scanning. As can be seen from comparing fig. 5 (or fig. 6) and fig. 7, in the display panel 400 provided in the embodiment of the present invention, the light-emitting area per unit area in the transparent display region 420 is increased, so as to increase the display brightness of the region, and effectively improve the brightness difference between the transparent display region 420 and the display region 410.
Optionally, fig. 8 is a schematic structural diagram of another transparent display region in the display panel according to the embodiment of the present invention, and it can be seen that the transparent display region 420 may be divided into a plurality of pixel units 420a arranged in an array (one pixel unit 420a is indicated by a dashed-line box in fig. 8), and the sub-pixels 430 include at least three colors, so that each pixel unit 420a includes one first sub-pixel 431 of each color and at least one second sub-pixel 432 of each color; in addition, in each pixel unit 420a, the anode electrodes 430a of the first sub-pixels 431 of each color are respectively connected with the anode electrodes 430a of at least one second sub-pixel 432 of the same color.
In the embodiment of the present invention, the space of the transparent display region 420 may be divided, for example, into a plurality of pixel units 420a arranged in an array, so as to reasonably configure the connection manner of the sub-pixels 430 and the arrangement manner of the driving TFTs in the region, and fig. 8 illustrates that the sub-pixels 430 include three colors of red, green, and blue (R, G, B), each pixel unit 420a includes the sub-pixels 430 of the three colors, and each sub-pixel 430 of each color has three. Specifically, the anode electrodes 430a of all the same-color sub-pixels 430 (including one first sub-pixel 431 and at least one second sub-pixel 432 of the same color) in each pixel unit 420a are connected, each pixel unit 420a of the transparent display region 420 shown in fig. 8 includes one red first sub-pixel 431, one green first sub-pixel 431 and one blue first sub-pixel 431, and two red second sub-pixels 432, two green second sub-pixels 432 and two blue second sub-pixels 431, and each pixel unit 420a illustrated by a dotted line frame in fig. 8 is connected with the anode electrodes 430a of the red second sub-pixels 432 (two are illustrated in fig. 8). According to the PPI of the transparent display region 420 and the brightness difference between the two regions, the size of the pixel unit 420a can be divided reasonably, that is, the display brightness which is the same as or close to that of the display region 410 can be achieved when several sub-pixels 430 with the same color are calculated in the pixel unit 420 a.
In practical applications, the at least three color sub-pixels 431 in each pixel unit 420a are connected to at least three driving TFTs, that is, the pixel unit 420a illustrated in fig. 8 includes 9 three color sub-pixels, and the 9 sub-pixels are driven only by three sets of driving TFTs, that is, the set of driving TFTs is configured for the first red, green and blue sub-pixels 431 in the pixel unit 420 a.
The display panels 400 of fig. 5, 6 and 8 of the present invention are illustrated by taking the sub-pixels 430 comprising Red, Green and Blue (Red, Green and Blue, abbreviated as RGB) sub-pixels 430 as an example, and taking the pixel unit 420a in the transparent display area 420 shown in fig. 8 as an example, no matter how many sub-pixels 430 are included in the pixel unit 420a, the number of driving TFTs for controlling the turn-on and turn-off of the sub-pixel 430 in each pixel unit 420a is the same as the number of colors of the sub-pixel 430 in the pixel unit 420a, that is, in each pixel unit 420a, all the red sub-pixels 430 are connected to the driving TFT of the red first sub-pixel 431 through the connected anode electrode 430a, all the green sub-pixels 430 are connected to the driving TFT of the green first sub-pixel 431, and all the blue sub-pixels 430 are connected to the driving TFT of the blue first sub-pixel 431. It can be seen that, in the embodiment of the present invention, the driving TFTs and the sub-pixels 430 in the pixel unit 420a are configured in such a manner that the number of the driving TFTs in the transparent display area 420 is n times smaller than that in the prior art, where n is the number of the sub-pixels 430 with the same color in the pixel unit 420 a. By dividing the transparent display region 420, the problem of brightness difference can be effectively improved, and the number and connection mode of the driving TFTs can be conveniently configured according to the pixel unit 420 a.
It should be noted that, in the transparent display region 420 shown in fig. 8, each pixel unit 420a includes three sub-pixels 430 with the same color as an example, that is, the anode electrodes 430a of the sub-pixels 430 with the same color in the pixel unit 420a are connected. In the embodiment of the present invention, the number of the sub-pixels 430 with the same color in each pixel unit 420a is not limited, and may be two, four or more, in order to ensure the uniformity of the display brightness inside the transparent display region 420, the number of the sub-pixels 430 with the same color in the divided pixel units 420a may be the same, and the arrangement modes of the sub-pixels 430 in different pixel units 420a are the same, which may refer to the structure shown in fig. 8.
In the display panel 400 provided in the above embodiments of the present invention, in order to achieve the effect of improving the display brightness of the transparent display region 420 and reducing the brightness difference between the transparent display region 420 and the display region 410, the anode electrodes 430a of the sub-pixels 430 with the same color are connected, and the sub-pixels 430 connected to the anode electrodes 430a are preferably adjacent to the sub-pixels 430, so that the light emitting area of the sub-pixels 430 in the transparent display region 420 is larger than the light emitting area of the sub-pixels in the transparent display region of the existing display panel when the display panel 400 scans.
Optionally, in the embodiment of the present invention, the transparent display area 420 may be designed to be rectangular, circular, or in other shapes, and the shape of the transparent display area 420 may be configured reasonably according to the shape of the device disposed on the backlight side of the transparent display area 420.
In practical applications, as shown in fig. 5, 6 and 8, in the transparent display region 420, the dotted rectangular squares in the transparent region 440 are actually empty, that is, the manufactured display panel 400 does not have the rectangular squares indicated by dotted lines in the film layer (i.e., the electrode layer and the light-emitting layer) to which the sub-pixels 430 belong, and the regions outside the sub-pixels 430 in the electrode layer and the light-emitting layer may be filled with a transparent material to achieve the light transmission effect of the transparent region 440, and in fig. 5, 6 and 8, for convenience of showing the relative position relationship of the sub-pixels 430 connected to the anode electrode 430a, the dotted lines with the same size and arrangement form are filled in the transparent region 440.
Based on the display panel 400 provided in the above embodiments of the present invention, an embodiment of the present invention further provides a manufacturing method of a display panel, which is used for manufacturing the display panel 400 provided in any of the above embodiments of the present invention.
Fig. 9 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention. The method provided by the embodiment of the invention can comprise the following steps:
s510, forming an anode layer film of sub-pixels in a display area and a transparent display area of the display panel;
s520, performing graphical processing on the anode layer film by using an anode layer mask plate to form anode electrodes of the sub-pixels, wherein the anode electrodes of at least two sub-pixels with the same color in the formed transparent display area are connected.
In the embodiment of the present invention, a relation structure between a subpixel and an anode electrode in a middle transparent display area may be provided with reference to any one of embodiments shown in fig. 5, fig. 6, and fig. 8, and a display panel manufactured by the manufacturing method provided by the embodiment of the present invention is a full-screen display panel, and is a self-luminous display panel, for example, an OLED panel, a micro LED panel, or another type of display panel capable of realizing self-luminescence. A sub-pixel of a self-light emitting type display panel may generally include an anode electrode layer, an organic-light Emitting Layer (EL) and a cathode electrode layer. Based on the structural difference between the transparent display area in the display panel shown in fig. 5, 6, and 8 and the transparent display area in the conventional display panel, the manufacturing method of the display panel according to the embodiment of the present invention is different in that the metal trace of the anode electrode of the sub-pixel in the transparent display area is used, that is, the manufacturing method is an embodiment of manufacturing the anode electrode of the sub-pixel in the display panel according to the embodiment.
Similar to the conventional process for manufacturing the anode electrode in the display panel, an anode layer film for forming the anode electrode may be manufactured first, and the anode layer film may be a metal film layer with a certain thickness formed by a deposition process. Then, a pre-made Anode layer mask (Anode mask) can be used to perform patterning processing on the metal thin film layer, where the patterning processing may include processes such as glue coating, exposure, development, and etching, that is, an Anode electrode of a sub-pixel is formed in a pre-configured manner, and the structure of the Anode electrode in the transparent display region formed by the steps and the Anode mask is as follows: the anode electrodes of at least two sub-pixels of the same color are connected. In addition, the structure of the anode electrode of the sub-pixel in the display area is similar to that in the prior art, and is not specifically described here.
By adopting the manufacturing method of the display panel provided by the embodiment of the invention, the anode electrode of the sub-pixel in the formed display panel has the same structure as the display panel provided by the embodiment shown in fig. 5, and the scanning mode of the display panel is the same as the scanning mode of the display panel shown in fig. 5, namely, the scanning mode of the transparent display area is that a plurality of sub-pixels with the same color connected with the anode electrode are simultaneously started. According to the manufacturing method of the display panel provided by the embodiment of the invention, the anode electrode of the display panel in any one of the above embodiments can be manufactured only by changing the anode layer mask plate of the anode electrode, that is, the light-emitting area of the transparent display area can be effectively increased without changing the opening areas of PDL and FMM, and the purpose of increasing the overall brightness in the transparent display area is achieved. In addition, the process mode of the manufacturing method provided by the embodiment of the invention is easy to realize, the manufacturing cost is low, and the yield is high.
It should be noted that, by using the manufacturing method of the display panel according to the embodiment of the present invention, the anode electrode of the sub-pixel in the manufactured display panel, specifically, the anode electrode of the sub-pixel in the transparent display area, has the same structure as that of the display panel according to any embodiment shown in fig. 5, and reference may be made to the specific structure and example in the display panel, which is not described herein again.
According to the manufacturing method of the display panel provided by the embodiment of the invention, the anode layer thin films of the sub-pixels in the display area and the transparent display area of the display panel are formed, and the anode layer thin films are subjected to graphical processing by adopting the anode layer mask plate to form the anode electrodes of the sub-pixels, wherein the anode electrodes of at least two sub-pixels with the same color in the formed transparent display area are connected, so that the display brightness of the transparent display area can be effectively improved. According to the manufacturing method of the display panel, the problem that brightness difference exists in the display panel due to the fact that the transparent display area is compatible with the transparent function and the display function in the existing full-screen display panel is solved by reasonably designing the anode layer mask plate of the sub-pixels in the transparent display area. In addition, the embodiment of the invention can effectively improve the light emitting area of the transparent display area under the condition of not changing the opening areas of the PDL and the FMM, thereby avoiding the adverse effect on the opening area in the conventional display area caused by increasing the opening areas of the PDL and the FMM in the transparent display area.
Optionally, fig. 10 is a flowchart of another manufacturing method of a display panel according to an embodiment of the present invention, and on the basis of the embodiment shown in fig. 9, the manufacturing method according to the embodiment of the present invention may further include, before S510:
s500, forming a TFT array layer of the display panel, wherein the formed TFT array layer comprises a plurality of groups of driving TFTs arranged in an array manner;
the implementation manner of S520 in the embodiment of the present invention may be:
and carrying out graphical processing on the anode layer film by adopting an anode layer mask plate to form an anode electrode of the sub-pixel, wherein the sub-pixel in the formed transparent display area comprises a first sub-pixel provided with a driving TFT and a second sub-pixel not provided with the driving TFT, and at least two sub-pixels with the same color, which are connected with the anode electrode, comprise a first sub-pixel and at least one second sub-pixel.
Generally, the on and off of the sub-pixels in the display panel during the scanning process are controlled by the driving TFTs corresponding to the sub-pixels one by one, that is, in the conventional display panel, each sub-pixel is connected to a group of driving TFTs, so that the number of the driving TFTs is the same as that of the sub-pixels, and a group of driving TFTs generally includes a plurality of TFT transistors (for example, 6 or 7), and the driving TFTs need to avoid the light emitting region and a part of the transparent region of each sub-pixel when designing the TFT array layer. Referring to the pixel density of the transparent display region shown in fig. 7, it can be seen that the density of sub-pixels in the transparent display region 330 is very low due to the influence of the area occupied by the circuit of the driving TFT.
In contrast, in the display panel manufactured by the manufacturing method provided by the embodiment of the present invention, due to the graphic design of the anode layer mask plate, in the formed transparent display region, the anode electrodes of the sub-pixels with the same color are connected, and only one of the sub-pixels connected to the anode electrodes is the first sub-pixel provided with the driving TFT, and the other second sub-pixels connected to the anode electrode of the first sub-pixel are not provided with the driving TFT, but share one group of driving TFTs with the first sub-pixel, that is, the driving TFT in the embodiment of the present invention can drive the first sub-pixel provided with the driving TFT and the second sub-pixel connected to the anode electrode of the first sub-pixel to be turned on and off simultaneously, accordingly, the structure of the transparent display area can reduce the occupied area of circuits of the TFT transistors in the TFT array layer, namely, the metal shading area is reduced, so that the penetration rate of the sub-units is increased, and the display brightness of the transparent display area is further improved. Comparing the pixel density of the transparent display region in the display panel provided by the embodiment of the invention shown in fig. 5, 6 and 8 with the pixel density of the transparent display region in the prior art shown in fig. 7, it can be seen that the density of the sub-pixels in the transparent display region is increased after the number of the driving TFTs is significantly reduced, and the PPI increase in the transparent display region does not affect the display brightness thereof because the number of the sub-pixels lighted during scanning is increased. Comparing fig. 5 (or fig. 6 and 8) with fig. 7, it can be seen that the display panel manufactured in the embodiment of the present invention increases the light emitting area per unit area in the transparent display region, increases the display brightness of the region, and effectively improves the brightness difference between the transparent display region and the display region.
It should be noted that, by using the manufacturing method of the display panel according to the embodiment of the present invention, the anode electrode of the sub-pixel in the manufactured display panel, specifically, the anode electrode of the sub-pixel in the transparent display region, the setting manner and the driving manner of the driving TFT in the transparent display region, and the corresponding relationship between the driving TFT in the pixel unit and the sub-pixel have the same structure as the display panel according to any one of the embodiments shown in fig. 8, and the same technical effect can be achieved by referring to the specific structure and example in the display panel, which is not described herein again.
Based on the display panel 400 provided in the above embodiments of the present invention, the embodiment of the present invention further provides a display device.
As shown in fig. 11, which is a schematic structural diagram of a display device according to an embodiment of the present invention, a display device 40 according to an embodiment of the present invention may include the display panel 400 according to any one of the embodiments shown in fig. 4 to 6 and fig. 8, and a camera module 450 disposed on a side of the display panel 400 away from a light-emitting surface and located in a front projection area of the transparent display area 420; the specific structure inside the transparent display region 420 is not illustrated in fig. 11, and reference may be made to the structures illustrated in fig. 5, 6, and 8.
The camera module 450 is configured to capture an image through the transparent area 440 in the transparent display area 420 while the display panel 400 displays the image.
The transparent display region 420 and the transparent region 440 are disposed in the display panel 400, and the non-display region (i.e., the transparent region 440) is used to implement other non-display functions, such as an image capture function. Therefore, a functional device, such as the camera module 450 or other types of functional devices, is disposed on a side of the transparent display region 420 away from the light emitting surface (i.e., a side of the display panel 400 away from the user).
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A display panel, comprising: a display area and a transparent display area;
the transparent display area comprises a plurality of sub-pixels and a transparent area without the sub-pixels, and anode electrodes of at least two sub-pixels with the same color are connected;
the sub-pixels in the transparent display area comprise a first sub-pixel provided with a driving Thin Film Transistor (TFT) and a second sub-pixel not provided with the driving TFT;
the at least two same-color sub-pixels connected with the anode electrode comprise a first sub-pixel and at least one second sub-pixel, and the driving TFT is used for driving the first sub-pixel provided with the TFT and the second sub-pixel connected with the anode electrode of the first sub-pixel to be simultaneously turned on or turned off in the scanning process of the display panel.
2. The display panel according to claim 1, wherein the sub-pixels comprise at least three colors, the transparent display region is divided into a plurality of pixel units arranged in an array, and each of the pixel units comprises one first sub-pixel of each color and at least one second sub-pixel of each color; in each pixel unit, the anode electrode of the first sub-pixel of each color is respectively connected with the anode electrode of at least one second sub-pixel of the same color.
3. The display panel according to any one of claims 1 to 2,
at least two sub-pixels with the same color and connected with the anode electrode are sub-pixels at adjacent positions.
4. The display panel according to any one of claims 1 to 2, wherein at least two same color sub-pixels connected by the anode electrode are located in different sub-pixel rows of the display panel.
5. The display panel according to any one of claims 1 to 2, wherein the transparent display region has a rectangular or circular shape.
6. A display device, comprising: the display panel according to any one of claims 1 to 5, and a camera module disposed on a side of the display panel away from the light emitting surface and located in a front projection area of the transparent display area;
the camera module is used for shooting images through the transparent area in the transparent display area while the display panel displays the images.
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