CN109801943B - Display panel and display device - Google Patents
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- CN109801943B CN109801943B CN201910019642.9A CN201910019642A CN109801943B CN 109801943 B CN109801943 B CN 109801943B CN 201910019642 A CN201910019642 A CN 201910019642A CN 109801943 B CN109801943 B CN 109801943B
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Abstract
The present disclosure relates to display technologies, and particularly to a display panel and a display device. The display panel includes a substrate, a thin film transistor circuit layer, and a light emitting display layer. The thin film transistor circuit layer has a plurality of maximum opaque regions. The light emitting display layer includes a plurality of sub-pixels. The sub-pixel with the largest area in the plurality of sub-pixels is the largest sub-pixel. One of the largest sub-pixels entirely covers one of the largest opaque regions. One of the sub-pixels except for the largest sub-pixel partially covers the largest opaque region. One of the largest sub-pixels entirely covers one of the largest opaque regions, which may make the area of the transparent region of the display panel larger. The display panel better meets the requirement of the fingerprint identification function under the screen on the light-transmitting area.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the market demand for full-screen, the fingerprint recognition function is also placed in the display area. It is an inevitable trend of the display device to realize the function of identifying the fingerprint under the screen. In order to realize the function of fingerprint under the screen, a sufficient light-transmitting area needs to be reserved when the display device is designed, and the sufficient light-transmitting area is used for transmitting fingerprint information of a user side to the fingerprint identification sensor. In the conventional scheme, a sufficient light transmission area cannot be reserved in the display device, so that the fingerprint identification function of the display device cannot meet the actual application requirement.
Disclosure of Invention
Based on this, it is necessary to provide a display panel and a display device to solve the problem that a sufficient light-transmitting area cannot be left in the display device in the conventional scheme.
A display panel, comprising:
a substrate;
the thin film transistor circuit layer is arranged on the substrate and is provided with a plurality of maximum light-tight areas;
the light-emitting display layer is arranged on one side, far away from the substrate, of the thin film transistor circuit layer and comprises a plurality of sub-pixels, and the sub-pixel with the largest area in the plurality of sub-pixels is the largest sub-pixel;
one of the largest sub-pixels in the light emitting display layer completely covers one of the largest opaque regions in the thin film transistor circuit layer.
In one embodiment, at least one of the sub-pixels except for the largest sub-pixel partially covers one of the largest opaque regions.
In one embodiment, in the light-emitting display layer, each six sub-pixels form a minimum repeating unit, each minimum repeating unit has two maximum sub-pixels, wherein a first maximum sub-pixel covers one maximum opaque region, and a second maximum sub-pixel covers a partial region of two maximum opaque regions.
In one embodiment, the thin film transistor circuit layer includes a plurality of thin film transistors and a plurality of storage capacitors;
each of the maximum opaque regions is divided into a first region and a second region;
the first area is an area where the plurality of storage capacitors are located;
the second region is a region where electrical connection lines between the plurality of storage capacitors are located, and the area of the first region is larger than that of the second region.
In one embodiment, a first one of said largest sub-pixels covers one of said first regions; the second maximum sub-pixel covers partial areas of two first regions and covers one second region, wherein the second region is a region between the two first regions.
In one embodiment, the area of the largest sub-pixels is equal to or larger than the area of the first region, and one of the largest sub-pixels completely covers one of the first regions.
In one embodiment, the six subpixels in the minimal repeating unit are arranged in two rows and three columns, a first one of the two largest subpixels is located in a first row and a first column, and a second one of the two largest subpixels is located in a second row and a third column.
In one embodiment, further comprising:
the driving circuit is arranged on the light-emitting display layer and is electrically connected with the plurality of sub-pixels respectively; and the contact hole is arranged between the thin film transistor circuit layer and the light-emitting display layer, one end of the contact hole is electrically connected with the output end of the driving circuit, and the other end of the contact hole is electrically connected with the anode of the sub-pixel.
In one embodiment, a line of anodes of the plurality of sub-pixels arranged in one direction row coincides with a line of the maximum opaque region arranged in one direction row.
A display device, comprising: the display panel of any of the above.
The present disclosure relates to display technologies, and particularly to a display panel and a display device. The display panel includes a substrate, a thin film transistor circuit layer, and a light emitting display layer. The thin film transistor circuit layer has a plurality of maximum opaque regions. The light emitting display layer includes a plurality of sub-pixels. The sub-pixel with the largest area in the plurality of sub-pixels is the largest sub-pixel. One of the largest sub-pixels entirely covers one of the largest opaque regions. One of the sub-pixels except for the largest sub-pixel partially covers the largest opaque region. One of the largest sub-pixels entirely covers one of the largest opaque regions, which may make the area of the transparent region of the display panel larger. The display panel better meets the requirement of the fingerprint identification function under the screen on the light-transmitting area.
Drawings
Fig. 1 is a schematic structural diagram of a display panel provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a thin film transistor circuit layer according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a portion of a thin film transistor circuit layer provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of a structure of a light-emitting display layer provided in an embodiment of the present application;
FIG. 5 is a schematic diagram of a stacked structure of a portion of a display panel provided in an embodiment of the present application;
FIG. 6 is a schematic diagram of a stacked structure of a portion of a display panel provided in an embodiment of the present application;
FIG. 7 is a schematic diagram of a minimal repeating unit provided in an embodiment of the present application;
FIG. 8 is a schematic view of a pixel display of a minimal repeating unit provided in an embodiment of the present application;
fig. 9 is a schematic view of a display device provided in an embodiment of the present application.
The reference numbers illustrate:
Thin film transistor circuit layer 20
Maximum opaque region 221
Light emitting display layer 30
Minimal repeating unit 312
Contact hole 33
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As described in the background art, in the prior art, the light-emitting display layer is generally directly laid on the thin film transistor circuit layer, and the problem of light transmission of the whole display screen body is not particularly considered, and the problems of obstacles to the fingerprint identification function under the screen caused by the light transmission area of the display panel and the small light transmission area are not fully considered. The inventor researches and discovers that the reason why the whole display screen body is poor in light transmission is that both the light-emitting display layer and the thin film transistor circuit layer are provided with lightproof film layers, and if the area of the overlapped part of the lightproof film layers is small, the light transmission area of the display panel is low, so that the performance optimization of the display panel is influenced, for example, the performance of fingerprint identification under the screen is poor easily.
The application provides a display panel and display device, display panel can fully improve the printing opacity area, is favorable to the realization of fingerprint recognition function under the screen. The application provides a display panel and display device, design cost is low, need not great change design process, can effectual effective printing opacity region that enlarges display panel. And this application provides a display panel and display device, the not big enough and lead to the unable problem that realizes of fingerprint identification function under display device's the screen can not appear transmitting light area in using.
The display panel and the display device provided by the present application can be directed to an Organic Light-Emitting Diode (OLED) screen structure. The OLED screen body has the self-luminous characteristic. Generally, the OLED device uses a very thin organic material coating and a glass substrate, when a current flows, the organic material emits light, and the OLED display screen has a large viewing angle and can save electric energy. In terms of the organic light-emitting material used in the OLED, a small molecule device system may be selected, and a polymer device system using a conjugated polymer as a material may also be selected. The application of the small molecule OLED device is wider in view of the requirements of monitoring reliability, electrical characteristics and production stability of the screen body.
Referring to fig. 1 to 4, in one embodiment, a display panel 100 is provided. The display panel 100 includes a substrate 10, a thin film transistor circuit layer 20, and a light emitting display layer 30.
The substrate 10 may be a hard-screen glass or a flexible-screen polyimide. The thin film transistor circuit layer 20 is disposed on one side of the substrate 10. The thin film transistor circuit layer 20 has a plurality of maximum opaque regions 221. Specifically, the maximum opaque region 221 is a relatively large opaque region in the thin film transistor circuit layer 20. The maximum opaque region 221 may be some opaque metal layer or some electrode plate.
The light emitting display layer 30 includes a plurality of sub-pixels 31. The area of each sub-pixel 31 in the plurality of sub-pixels 31 may not be completely the same, wherein the sub-pixel 31 with the largest area is the largest sub-pixel 311. The plurality of sub-pixels 31 includes a red sub-pixel, a blue sub-pixel, and a green sub-pixel. In one embodiment, the plurality of sub-pixels 31 may further include a compensation sub-pixel. The parameters of the compensation sub-pixel may be the same as those of any one of the red, blue or green sub-pixels, or may be set by other designers.
One of the largest sub-pixels 311 in the light emitting display layer 30 completely covers one of the largest opaque regions 221 in the thin film transistor circuit layer 20. One of the largest sub-pixels 311 entirely covers one of the largest opaque regions 221, which may make the area of the transparent region of the display panel 100 larger. The display panel 100 better meets the requirement of the fingerprint identification function under the screen for the light-transmitting area.
In this embodiment, the display panel 100 includes the substrate 10, the thin film transistor circuit layer 20, and the light emitting display layer 30. And the largest sub-pixel 311 in the light emitting display layer 30 covers the largest opaque region 221 in the thin film transistor circuit layer 20. Specifically, one of the largest sub-pixels 311 completely covers one of the largest opaque regions 221. One of the sub-pixels 31 of the plurality of sub-pixels 31 except for the largest sub-pixel 311 partially covers the largest light opaque region 221. The above design can make the area of the light-transmitting area of the display panel 100 larger. The display panel 100 better meets the requirement of the fingerprint identification function under the screen for the light-transmitting area.
In one embodiment, at least one of the sub-pixels 31 of the plurality of sub-pixels 31 except the largest sub-pixel 311 partially covers one of the largest opaque regions 221.
In this embodiment, the arrangement of one or more of the sub-pixels 31 except for the maximum sub-pixel 311 is provided, so that the area of the light-transmitting region of the display panel 100 can be further increased.
In one embodiment, a minimal repeating unit 312 is formed in the emissive display layer 30 for every six of the sub-pixels 31. Each of the minimal repeating units 312 has two maximal sub-pixels 311. Referring to fig. 6, a first maximum sub-pixel 311 (blue sub-pixel) covers a partial area of the maximum opaque region 221. The second maximum subpixel 311 (blue subpixel) covers a partial area of both of the maximum opaque regions 221.
In this embodiment, one of the minimum repeating units 312 is defined, and the other sub-pixels 31 disposed in the light-emitting display layer 30 are defined by the minimum repeating unit 312. The other sub-pixels 31 in the minimal repeating unit 312 cover a small portion of the maximum opaque region 221. The maximum light transmission area is achieved in the minimum repeating unit 312. By disposing the light emitting display layer 30 according to the minimum repeating unit 312, the light transmission area of the display panel 100 can be maximized. In this embodiment, the display panel 100 is manufactured according to the design scheme shown in fig. 6, and the light transmittance of the pixel can reach 24.9% through software simulation, which increases the light transmission area by 1.1% compared with the conventional design scheme.
In one embodiment, the thin film transistor circuit layer 20 includes a plurality of thin film transistors 21 and a plurality of storage capacitors 22. Each of the maximum opaque regions 221 is divided into a first region 222 and a second region 223.
The first region 222 is a region where the plurality of storage capacitors 22 are located. The second region 223 is a region where electrical connection lines between the plurality of storage capacitors 22 are located. The area of the first region 222 is larger than the area of the second region 223.
In this embodiment, the maximum opaque region 221 located in the thin film transistor circuit layer 20 is divided into the first region 222 and the second region 223, so that the structure of the thin film transistor circuit layer 20 can be sufficiently distinguished. This makes it possible, on the one hand, to reduce the light-impermeable areas of the first region 222 and the second region 223 in a targeted manner. On the other hand, the position of the maximum sub-pixel 311 can be set more reasonably, so that the opaque regions of the thin film transistor circuit layer 20 and the light-emitting display layer 30 are overlapped as much as possible, so that the whole display panel 100 has the maximum transparent area.
Referring to fig. 5, in one embodiment, a first of the largest sub-pixels 311 covers one of the first regions 222.
In this embodiment, the first maximum sub-pixel 311 covers one of the first regions 222, and the specific covering manner may be to make the opaque region of the storage capacitor 22 and the opaque region (anode) of the maximum sub-pixel 311 overlap as much as possible. In the covering process, there may be a case that the edge of the opaque region of the largest sub-pixel 311 leaks out, and at this time, the covering manner may be optimized by calculation or the like, so that the first largest sub-pixel 311 covers one first region 222, and the opaque area of the display panel 100 is ensured to be the minimum to the maximum extent.
Referring to fig. 6, in an embodiment, a second maximum sub-pixel 311 covers a part of the areas of two first regions 222 and covers a second region 223, wherein the second region 223 is a region between the two first regions 222. The differences between fig. 5 and 6 are: a first one of the largest sub-pixels 311 in a first one of the smallest repeating units 312 in fig. 5 covers the first area 222 and the second area 223 of one of the largest opaque areas 221. The first maximum sub-pixel 311 in the second minimum repeating unit 312 covers a part of the areas of the two first regions 222 and covers one second region 223, wherein the second region 223 is a region between the two first regions 222.
In fig. 6, the first maximum sub-pixel 311 in the first minimum repeating unit 312 completely covers only the first region 222 of one of the maximum opaque regions 221, and does not cover the second region 223. The first maximum sub-pixel 311 in the second minimum repeating unit 312 covers a part of the areas of the two first regions 222 and covers one second region 223, wherein the second region 223 is a region between the two first regions 222. Specifically, whether the actual operation is performed according to the scheme of fig. 5 or the scheme of fig. 6, the selection can be made by referring to the specific area of the maximum sub-pixel 311.
Since the arrangement structure of the sub-pixels 31 and the arrangement structure of the maximum opaque regions 221 are not identical, it is impossible to cover one of the maximum opaque regions 221 per one of the maximum sub-pixels 311. In one embodiment, a second one of the largest sub-pixels 311 in one of the minimal repeating units 312 covers a part of the area of two of the first regions 222 and covers one of the second regions 223. Wherein the second region 223 is a region between the two first regions 222. Specifically, the second largest sub-pixel 311 may cover 80% of the opaque area of the first region 222. The second largest sub-pixel 311 may cover 20% of the opaque area of the other first area 222. Alternatively, the second largest sub-pixel 311 may cover 70% of the opaque area of one of the first regions 222. The second largest sub-pixel 311 may cover 20% of the opaque area of the other first area 222. Still alternatively, the second largest sub-pixel 311 may cover 60% of the opaque area of one of the first regions 222. The second largest sub-pixel 311 may cover 20% of the opaque area of the other first area 222. Specifically, the coverage condition also needs to be determined according to the layout requirements of the designer for the thin film transistor circuit layer 20 and the light emitting display layer 30.
In this embodiment, no matter how the coverage proportion is allocated, the whole light transmission area of the display panel 100 is increased, the problem that the light transmission area of the display panel 100 is small is solved, and the design requirement of the fingerprint identification function under the screen on the light transmission area is better met.
In one embodiment, the area of the largest sub-pixels 311 is equal to or larger than the area of the first regions 222, and one of the largest sub-pixels 311 completely covers one of the first regions 222.
In this embodiment, the area of the largest sub-pixel 311 is greater than or equal to the area of the first region 222, specifically, the area of the opaque anode layer in the largest sub-pixel 311 may be greater than or equal to the area of the opaque electrode plate in the storage capacitor 22.
Referring to fig. 4, fig. 5 and fig. 6, in an embodiment, the display panel 100 shown in fig. 4 further includes a driving circuit 32. The driving circuit 32 is disposed on the light emitting display layer 30 and electrically connected to the plurality of sub-pixels 31, respectively. The display panel 100 further includes a contact hole 33 as shown in fig. 7. The contact hole 33 is disposed between the thin film transistor circuit layer 20 and the light emitting display layer 30. And one end of the contact hole 33 is electrically connected to the output terminal of the driving circuit 32, and the other end is electrically connected to the anode of the sub-pixel 31. The two dashed boxes in fig. 7 show two straight lines where the contact hole 33 is located, where the straight lines respectively outlined by the two dashed boxes are not absolute straight lines, and only the row and column arrangement of the sub-pixels is realized through the contact hole. The two dotted frames may or may not be straight lines, and may specifically be adjusted according to design requirements, for example, may be a zigzag structure.
In this embodiment, the driving circuit 32 is electrically connected to the plurality of sub-pixels 31, respectively, and is configured to send driving control signals to the plurality of sub-pixels 31. The driving circuit 32 controls the plurality of sub-pixels 31 to perform different types of display. The contact hole 33 enables electrical connection of the sub-pixel 31 and the driving circuit 32.
Referring to fig. 7-8, in one embodiment, the six subpixels 31 in the minimal repeating unit 312 are arranged in two rows and three columns, a first one 311 of the two largest subpixels 311 is located in a first row and a first column, and a second one 311 of the two largest subpixels 311 is located in a second row and a third column. In fig. 5, the sub-pixels 31 in the first row are arranged in such a manner that the blue sub-pixel, the green sub-pixel, and the red sub-pixel are sequentially arranged. In fig. 5, the sub-pixels 31 in the second row are arranged in a manner that red, green, and blue sub-pixels are sequentially arranged.
In this embodiment, an arrangement structure of the minimum repeating unit 312 is provided, and of course, the minimum repeating unit 312 may have other arrangement structures, which may be changed according to design requirements. Or the arrangement structure of the minimum repeating unit 312 is continuously adjusted during the display process of the display panel 100 to adapt to the display panel 100 maintaining the display with the maximum light transmission area.
In one embodiment, as shown in fig. 5-7, a first one of the largest sub-pixels 311 and a second one of the largest sub-pixels 311 are both blue sub-pixels.
In this embodiment, two of the largest sub-pixels 311 in one of the minimum repeating units 312 are designed to be blue sub-pixels according to actual display requirements. It is understood that two of the largest sub-pixels 311 in one of the minimal repeating units 312 may also be designed as green sub-pixels. It is understood that two of the largest sub-pixels 311 in one of the minimal repeating units 312 may also be designed as red sub-pixels. It is understood that two of the largest sub-pixels 311 in one of the minimal repeating units 312 may also be designed as sub-pixels of different colors.
Referring to fig. 7, in one embodiment, a connection line of the anodes of the plurality of sub-pixels 31 arranged in a row along one direction coincides with a connection line of the maximum opaque regions 221 arranged in a row along one direction. The connection of the contact holes 33 in fig. 7 can be illustrated by two dotted line boxes, and the pixel arrangement is such that the minimum repeating unit 312 is displayed in an arrangement of a first line BGR (blue-red sub-pixel, blue sub-pixel, red sub-pixel) and a second line RGB (red sub-pixel, blue-red sub-pixel). The pixel arrangement structure in fig. 7 is determined according to the position of each of the contact holes 33 connected to the sub-pixels, and is not determined only according to the specific physical position of the sub-pixels. The contact holes 33 in the first row of dashed boxes in fig. 7 can be considered to be in a straight line. The contact holes 33 in the second row of the dashed box in fig. 7 can be considered to be in a straight line. Thus, one of the minimal repeating units 312 in fig. 7 forms the pixel arrangement structure shown in fig. 8.
In this embodiment, the display panel 100 has the plurality of sub-pixels 31 and the plurality of maximum opaque regions 221 arranged in order, so that on one hand, the maximum transparent area of the display panel 100 can be ensured. On the other hand, the arrangement structure can fully reduce the difficulty of process design and has high process repeatability.
Referring to fig. 9, in an embodiment, a display device 200 is provided, including the display panel 100 described in any one of the above embodiments.
The display device 200 may further include a package structure, a touch electrode, and a cover plate. The package structure, the touch electrode and the cover plate are sequentially stacked on one side of the light-emitting display layer 30 away from the thin film transistor circuit layer 20.
The display device 200 may be a smart phone, a tablet computer, a car stereo, or other display devices 200 using the display panel 100. For example, the display device 200 may be a smart billboard or other place where the display panel 100 is applied. The display panel 100 may be a hard-screen OLED or a flexible OLED, and may be distinguished by selecting different materials according to the substrate 10.
The display device 200 may further include an underscreen fingerprint identifier disposed on a surface of the substrate 10 away from the thin film transistor circuit layer 20, and the display panel 100 has a larger light-transmitting area, which may meet the use requirement of the underscreen fingerprint identifier.
In this embodiment, also incorporated in the display device 200, a first one of the largest sub-pixels 311 in one of the smallest repeating units 312 covers a partial region of one of the largest opaque regions 221; the idea of designing that the second maximum sub-pixel 311 in one of the minimum repeating units 312 covers a part of the two maximum opaque regions 221. The display device 200 also solves the problem of small light transmission area, and better meets the requirement of the fingerprint identification function under the screen on the light transmission area.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An organic electroluminescent display panel, comprising:
a substrate (10);
a thin film transistor circuit layer (20) disposed on the substrate (10), the thin film transistor circuit layer (20) having a plurality of maximum opaque regions (221);
the light-emitting display layer (30) is arranged on one side, away from the substrate (10), of the thin film transistor circuit layer (20), the light-emitting display layer (30) comprises a plurality of sub-pixels (31), and the sub-pixel (31) with the largest area in the plurality of sub-pixels (31) is the largest sub-pixel (311);
one of the largest sub-pixels (311) in the light emitting display layer (30) completely covers one of the largest opaque regions (221) in the thin film transistor circuit layer (20), and the largest sub-pixel (311) includes the opaque region.
2. The organic electroluminescent display panel according to claim 1, wherein at least one of the sub-pixels (31) of the plurality of sub-pixels (31) other than the largest sub-pixel (311) partially covers one of the largest opaque regions (221).
3. The organic electroluminescent display panel according to claim 2, wherein in the luminescent display layer (30), every six of the sub-pixels (31) form a minimum repeating unit (312), each of the minimum repeating units (312) having two maximum sub-pixels (311), wherein a first one of the maximum sub-pixels (311) covers one of the maximum opaque regions (221), and wherein a second one of the maximum sub-pixels (311) covers a partial region of both of the maximum opaque regions (221).
4. The organic electroluminescent display panel according to claim 3, wherein the thin film transistor circuit layer (20) includes a plurality of thin film transistors (21) and a plurality of storage capacitors (22);
each of the maximum opaque regions (221) is divided into a first region (222) and a second region (223);
the first region (222) is a region where the plurality of storage capacitors (22) are located;
the second region (223) is a region where electrical connection lines between the plurality of storage capacitors (22) are located, and the area of the first region (222) is larger than the area of the second region (223).
5. The organic electroluminescent display panel according to claim 4,
a first one of said largest sub-pixels (311) covers one of said first regions (222);
a second one of said largest sub-pixels (311) covers a partial area of two of said first regions (222) and covers one of said second regions (223), wherein said second region (223) is a region between said two of said first regions (222).
6. The organic electroluminescent display panel according to claim 4, wherein the area of the largest sub-pixels (311) is equal to or larger than the area of the first regions (222), and one of the largest sub-pixels (311) completely covers one of the first regions (222).
7. The organic electroluminescent display panel according to claim 3, wherein six of the subpixels (31) in the minimal repeating unit (312) are arranged in an arrangement of two rows and three columns, a first one of the largest subpixels (311) of the two largest subpixels (311) is located in a first row and a first column, and a second one of the largest subpixels (311) of the two largest (311) is located in a second row and a third column.
8. The organic electroluminescent display panel according to claim 7, wherein a first one of the largest sub-pixels (311) and a second one of the largest sub-pixels (311) are both blue sub-pixels.
9. The organic electroluminescent display panel according to claim 8, wherein a line of anodes of the plurality of sub-pixels (31) arranged in a row in one direction coincides with a line of the maximum opaque regions (221) arranged in a row in one direction.
10. A display device, comprising: the organic electroluminescent display panel (100) according to any one of claims 1 to 9.
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