The present disclosure relates to the field of display technologies, and in particular to a display panel and a display apparatus.
Organic light emitting diodes (OLEDs), with their low power consumption, high colour saturation, wide viewing angle, thinness and flexibility, are becoming the mainstream in the field of display technologies and can be widely used in end products such as smartphones, tablet PCs and TVs. However, transmittance of OLED display panels still needs to be further improved, especially in the application of under-screen cameras, where the cameras are disposed on back sides of the display regions of the screens and regions corresponding to the under-screen cameras can be used for display and also allows photography functions. The current OLED display panels are not conducive to good photography effect of the under-screen cameras due to poor transmittance, and the current under-screen cameras have a severe glare phenomenon when taking pictures.
Therefore, researches into OLED display panels are yet to be further developed.
The present disclosure is intended to solve, at least to some extent, one of the technical problems in the related art. To this end, an object of the present disclosure is to provide a display panel in which the transmittance is better.
In one aspect of the present disclosure, a display panel is provided in the present disclosure. According to the embodiments of the present disclosure, the display panel has a display region including a first display region and a second display region, and a density of pixel circuits in the first display region is less than a density of pixel circuits in the second display region; the display panel includes: a base substrate; a plurality of first pixel circuits disposed on the base substrate and located in the second display region; a plurality of first traces disposed on a side of the first pixel circuits away from the base substrate; a pixel defining layer disposed on a side of the first traces away from the base substrate and defining a plurality of openings; a plurality of first light emitting devices disposed on the side of the first traces away from the base substrate and located in the first display region, where the first light emitting devices have effective light emitting regions respectively located in the openings, the first light emitting devices have first anodes each including an effective light emitting anode region and a non-light emitting anode region disposed surrounding the effective light emitting anode region, and the pixel defining layer covers the non-light emitting anode region; where the first traces are respectively electrically connected with the first pixel circuits through first vias and respectively electrically connected with the first anodes through second vias, and orthographic projections of the second vias on the base substrate are respectively located in orthographic projections of the first anodes on the base substrate. As a result, the first trace is directly electrically connected with the first anode through the second via, without the need to dispose a protruding portion around the first anode for electrically connecting with the first trace, so that the transmittance of the first display region may be further improved. Furthermore, without disposing the protruding portion, it can reduce the diffraction effect of the light hitting onto the first anode and when the under-screen camera is disposed on the back of the display panel corresponding to the first display region, it can effectively improve the glare phenomenon during photography of the display panel.
According to the embodiments of the present disclosure, the openings are shaped as circles, parts of circles, ovals or parts of ovals, and/or the first anodes are shaped as circles or ovals.
According to the embodiments of the present disclosure, the first light emitting devices include blue light emitting devices, red light emitting devices and green light emitting devices, first anodes in the blue light emitting devices are shaped as circles or sub-circular ovals, and first anodes in the red light emitting devices and the green light emitting devices are shaped as ovals.
According to the embodiments of the present disclosure, the display panel further includes: a first insulating layer disposed on the side of the first pixel circuits away from the base substrate, where the plurality of first traces are disposed on a surface of the first insulating layer away from the base substrate and respectively electrically connected with the first pixel circuits through the first vias penetrating the first insulating layer; a second insulating layer disposed on the surface of the first insulating layer away from the base substrate and covering the first traces, where the pixel defining layer is disposed on a side of the second insulating layer away from the base substrate, and the first anodes are respectively electrically connected with the first traces through the second vias penetrating the second insulating layer.
According to the embodiments of the present disclosure, portions of the orthographic projections of the second vias on the base substrate are respectively covered by orthographic projections of effective light emitting anode regions on the base substrate, and other portions thereof are respectively covered by orthographic projections of non-light emitting anode regions on the base substrate.
According to the embodiments of the present disclosure, the orthographic projections of the second vias on the base substrate are respectively covered by orthographic projections of the non-light emitting anode regions on the base substrate.
According to the embodiments of the present disclosure, the orthographic projections of the second vias on the base substrate are respectively covered by orthographic projections of effective light emitting anode regions on the base substrate.
According to the embodiments of the present disclosure, a material forming the first traces includes at least one of ITO and AZO.
According to the embodiments of the present disclosure, the display panel further includes: a plurality of second pixel circuits and a plurality of second light emitting devices that are both located in the second display region, where the second pixel circuits are respectively connected with second anodes in the second light emitting devices by at least one of following means: the second pixel circuits are directly electrically connected with the second anodes in the second light emitting devices through third vias, to drive the second light emitting devices to emit light; the display panel further includes a conductive layer disposed in a same layer as the first traces, the second anodes are electrically connected with the conductive layer through fourth vias penetrating the second insulating layer, and the conductive layer is electrically connected with the second pixel circuits through fifth vias penetrating the first insulating layer, to drive the second light emitting devices to emit light.
In another aspect of the present disclosure, a display apparatus is provided in the present disclosure. According to the embodiments of the present disclosure, the display apparatus further includes: the display panel described above; an under-screen functional layer, where an orthographic projection of the under-screen functional layer on the display panel overlaps the first display region of the display panel. As a result, the under-screen functional layer in this display apparatus has a large amount of incident light and when it is an under-screen camera, it can effectively improve its shooting quality and improve the glare phenomenon when it takes pictures. A person skilled in the art may understand that the display apparatus has all features and advantages of the display panel described above, and this will not be further elaborated herein.
The following describes in detail embodiments of the present disclosure. The embodiments described below are exemplary and are intended to explain the present disclosure rather than limit the scope of the present disclosure. If no specific technology or condition is specified in the embodiments, the technologies or conditions described in the literature within the field or the product manual shall be adopted.
In one aspect of the present disclosure, a display panel is provided in the present disclosure. According to some embodiments of the present disclosure, the display panel has a display region including a first display region a and a second display region b. In some embodiments, the second display region b is located at an outer edge of the first display region a, which means that the second display region b is disposed at an outer side of the first display region a, or the second display region b is disposed surrounding a periphery of the first display region a. In addition, there is no special requirement for the specific setting position of the first display region a, and a person skilled in the art may flexibly choose it according to the actual design requirements of the under-screen functional region. For example, the first display region may be located in a center of the display panel, or in a corner of the display panel, or as shown in
Moreover, there is no specific requirement for a specific shape of the first display region a, and a person skilled in the art may flexibly choose it according to the actual situation. For example, the shape of the orthographic projection of the first display region a on the base substrate includes but is not limited to a circle, an ellipse, a polygon such as a quadrilateral, a pentagon, or a hexagon, or an irregular shape.
Density of pixel circuits in the first display region a is less than density of pixel circuits in the second display region b, which means that distribution density of the pixel circuits in the first display region a (i.e., the first pixel circuits referred to in the following text) is less than distribution density of the pixel circuits in the second display region b (i.e., the second pixel circuits referred to in the following text). It will be noted that the pixel circuits in the text refer to the driving circuits that provide drive voltage for OLED light emitters, and may be of circuit structures such as 7T1C or 9T2C. It will be noted that the pixel circuit is used to drive the light emitter (OLED device) to emit light, and includes structures such as an active layer, a gate, source-drain, a storage capacitor, a data line, and a scan line.
In addition, as shown in
In addition, the distribution density of the light emitters in the first display region a may be less than or equal to the distribution density of the light emitters in the second display region b, and the distribution density of the light emitters in the second display region b may be less than or equal to the distribution density of the light emitters in the third display region c. Based on the above structure, the distribution density of the pixel circuits in the first display region a is the smallest, and it is ensured that sufficient light passes through the first display region and reach a back of the display panel. Meanwhile, by providing drive voltage for the light emitters in the first display region a through the first pixel circuits in the second display region b, the display resolution (PPI) of the first display region a can be equal to or slightly lower than the display resolution of other regions.
According to the embodiments of the present disclosure, as shown in
According to the embodiments of the present disclosure, referring to
The effective light emitting anode region mentioned above refers to a region of the first anode located inside an opening defined by the pixel defining layer, i.e., the effective light emitting region corresponding to the first light emitter.
According to the embodiments of the present disclosure, with reference to
There are no special requirement for the specific structure of the first pixel circuit 21, and a person skilled in the art may flexibly choose it according to actual conditions. In some embodiments, the first pixel circuit 21 is a structure of 7T1C circuit (i.e., seven transistors and one capacitor), including a driving transistor, a data writing transistor, a storage capacitor, a threshold compensation transistor, a first reset transistor, a second reset transistor, a first light emitting control transistor, and a second light emitting control transistor. There are no special requirements for the vertical structure of the first pixel circuit 21. In some embodiments, as shown in
In addition, referring to
According to the embodiments of the present disclosure, the first traces includes indium tin oxide (ITO), aluminum-doped zinc oxide (AZO) or both. As a result, the first trace has a high transmittance, which further enables the first display region to have a high transmittance.
According to the embodiments of the present disclosure, the relative position between the second via 62 and the first anode 511 may include the followings:
In some embodiments, with reference to
According to the embodiments of the present disclosure, the orthographic projection of the opening 41 of the pixel defining layer on the base substrate is shaped as a circle, a part of a circle, an oval or a part of an oval, and/or the orthographic projection of the first anode on the base substrate is shaped as a circle or an oval. As a result, the above-mentioned shape of the opening and the first anode facilitate a greater use of the opening in the fine metal mask (FMM) plate, to evaporate more light emitting material (EL material) and increase the lifetime of the first light emitter. In some embodiments, the orthographic projection of the first anode on the base substrate is shaped as a circle, the orthographic projection of the opening on the base substrate is also shaped as a circle; in some embodiments, the orthographic projection of the first anode on the base substrate is shaped as an oval, the orthographic projection of the opening on the base substrate is shaped as an oval or a circle. The specific shape of the first anode 511 and the opening 41 and the position of the second via 62 in relation to the first anode 511 and the opening 41 may be shown as follows:
In some embodiments, with reference to
In some other embodiments, referring to
In yet other embodiments, with reference to
In yet other embodiments, with reference to
However, in a same product (i.e., in a same display panel), a person skilled in the art may flexibly combine the specific settings of the second via, the first anode and the opening of the pixel defining layer in
According to the embodiments of the present disclosure, the first light emitters include a blue light emitter, a red light emitter and a green light emitter, where the orthographic projection of a first anode in the blue light emitter on the base substrate 10 is shaped as a circle or a sub-circular oval, and the orthographic projection of first anodes in the red light emitter and the green light emitter on the base substrate 10 are shaped as ovals. As a result, the light emitting efficiency of the first light emitter may be increased as much as possible. It will be noted that the sub-circular oval means that long and short axes of the oval are relatively similar, and a specific size of a difference between the short and long axes is designed flexibly by a person skilled in the art according to actual situations and is not limited herein.
According to the embodiments of the present disclosure, compared to the technical solution in which a protruding portion is disposed around the first anode, a proportion of a hollow area of the first display region in the display panel of the present disclosure is increased from 91.419% to 92.208%, effectively increasing the transmittance of the first display region. A region of the first display region excluding the first anode region is defined as a hollow region, and an area of the hollow region is the hollow area.
According to the embodiments of the present disclosure, with reference to
In some embodiments, referring to
In some other embodiments, referring to
Referring to
As shown in
In some embodiments, as shown in
According to the embodiments of the present disclosure, there are no special requirements for the shape of the second anode. A person skilled in the art may flexibly choose it according to actual requirements. In some embodiments, the shape of the second anode may be designed as a conventional shape in the conventional art; in some other embodiments, the shape of the second anode may be designed as a circle or an oval identical to the shape of the first anode.
In another aspect of the present disclosure, a display apparatus is provided in the present disclosure. According to the embodiments of the present disclosure, referring to
According to the embodiments of the present disclosure, as previously mentioned, since the first anode in the present disclosure does not need to be provided with a protruding portion electrically connected with the first trace, and thus can effectively improve the glare phenomenon when the under-screen camera takes pictures. Specifically, with reference to
According to the embodiments of the present disclosure, there are no special requirements for specific types of the structure of the under-screen functional layer. A person skilled in the art can flexibly choose it according to actual situations. In some specific embodiments, the under-screen functional layer may be an under-screen camera. As a result, it is possible to increase a screen-to-body ratio of the display panel while meeting requirements for the amount of incident light in the under-screen camera.
According to the embodiments of the present disclosure, there are no special requirements for specific types of the above display apparatus. A person skilled in the art may flexibly choose it according to actual conditions, for example, it can be a display device with display function such as a mobile phone, a notebook or a computer. Moreover, a person skilled in the art can understand that the above-mentioned display apparatus also has, in addition to the display panel and the under-screen functional layer described above, structures and components needed by a conventional display device. A mobile phone, for example, can also include essential structures and components such as a cover, a motherboard, a back cover and a middle frame.
It is understood by a person skilled in the art that the display apparatus may include, in addition to the display panel and the under-screen functional layer described above, structures or components needed by a conventional display device. A mobile phone also includes, for example, in addition to the display panel and the under-screen functional layer described above, structures or components such as a touch module, a glass cover, a housing, a voice module and a CPU.
In the descriptions of the present specification, terms such as “an embodiment”, “some embodiments”, “an example”, “a specific example” or “some examples” are intended to refer to that a specific feature, structure, material, or characteristic described in combination with an embodiment or an example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative expressions of the above terms do not necessarily refer to a same embodiment or example. Furthermore, specific feature, structure, material or characteristic described above may be combined in a proper way in any one or more embodiments or examples. In addition, a person skilled in the art may combine different embodiments or examples described in the present specification, as well as features of the different embodiments or examples, without mutual contradiction.
Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations to the present disclosure. Ordinary technical person in the art may make changes, modifications, substitutions, and variations to the above embodiments in the scope of the present disclosure.
This application is a national stage of international PCT Application No. PCT/CN2020/138660, filed on Dec. 23, 2020, the entire contents of which are incorporated herein by reference.
Filing Document | Filing Date | Country | Kind |
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PCT/CN2020/138660 | 12/23/2020 | WO |