CN109742112B - OLED display panel and electronic equipment - Google Patents
OLED display panel and electronic equipment Download PDFInfo
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- CN109742112B CN109742112B CN201910014715.5A CN201910014715A CN109742112B CN 109742112 B CN109742112 B CN 109742112B CN 201910014715 A CN201910014715 A CN 201910014715A CN 109742112 B CN109742112 B CN 109742112B
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Abstract
The invention relates to an OLED display panel and electronic equipment, and relates to the technical field of OLED display. The main technical scheme adopted is as follows: an OLED display panel, comprising: the OLED light-emitting unit is arranged on the array substrate and comprises a pixel defining layer and pixels of three primary colors; a light absorbing layer disposed on the pixel defining layer for absorbing red and green light. The OLED display panel provided by the embodiment of the invention solves the technical problem that white light is red or green when the display panel is viewed at a large viewing angle, and improves the display effect of the display panel.
Description
Technical Field
The invention relates to the technical field of OLED display, in particular to an OLED display panel and electronic equipment.
Background
Organic electroluminescent displays (OLED displays) have the advantages of active light emission, high brightness, high resolution, wide viewing angle, fast response speed, low energy consumption, flexibility and the like, and are receiving more attention, and become the next generation display technology that is likely to replace liquid crystal display. Especially flexible display and folding display products, more gradually in recent years is called the trend of OLED development.
However, the OLED display panel in the prior art has a certain technical problem, and is specifically embodied in that when a user watches the OLED display panel, if the user watches the OLED display panel at a large angle with respect to a plane of the OLED display panel, that is, under a large viewing angle condition, a color of a display image watched by the user is red or green, and a color of white light is impure under the large viewing angle. The main reason is that the luminance decay speed (L-decay) of the light emitted by the red, green and blue pixels is different due to the change of the RGB three primary colors with the viewing angle, the luminance decay of the light emitted by the red pixel and the green pixel is slow relative to that of the blue pixel as the viewing angle is larger, and the proportion of the red light and the green light in the white light ratio is higher, which causes the synthesized white light to be red or green at a large viewing angle.
However, no effective means for solving the above technical problems is currently available.
Disclosure of Invention
The main objective of the present invention is to provide an OLED display panel and an electronic device with a novel structure, so that the OLED display panel and the electronic device can solve the technical problem of red or green white light when viewed at a large viewing angle.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the present invention, an OLED display panel includes:
the OLED light-emitting unit is arranged on the array substrate and comprises a pixel defining layer and pixels of three primary colors;
and the light absorbing layer is shielded on the pixel defining layer and is used for absorbing red light and green light.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, in the OLED display panel, the light absorbing layer is a blue color film layer, or the light absorbing layer is a film layer with blue quantum dots;
wherein the light absorbing layer covers the entire upper portion of the pixel defining layer.
Optionally, in the OLED display panel, the pixels of the three primary colors include a blue pixel, a red pixel and a green pixel which are arranged in the pixel defining layer at intervals;
the light absorption layer is a film layer with light absorption particles and is used for absorbing red light, green light and blue light;
the light absorption layer covers partial area of the pixel defining layer between the red light pixel and the blue light pixel to form a first area, and the first area is positioned at one side close to the red light pixel; the light absorption layer covers a partial area of the pixel defining layer between the green pixel and the blue pixel to form a second area, and the second area is positioned at one side close to the green pixel; the light absorbing layer covers the pixel defining layer between the red and green pixels in its entirety.
Optionally, the OLED display panel described above, wherein the first region occupies half of the pixel defining layer between the red pixel and the blue pixel;
the second region occupies half of the pixel defining layer between the green and blue pixels.
Optionally, in the OLED display panel, the light absorbing particles are carbon black particles or black chromium particles.
Optionally, in the OLED display panel, the light absorbing layer has a thickness of 1 to 2 μm.
Optionally, the OLED display panel further includes: the packaging layer covers the OLED light-emitting unit;
wherein the light absorbing layer is disposed on the encapsulation layer;
alternatively, the light absorbing layer is disposed between the pixel defining layer and the encapsulation layer.
Optionally, in the OLED display panel, the light absorbing layer is covered on the OLED light emitting unit as an encapsulation layer.
In addition, the purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the present invention, an electronic device is provided, which includes: an OLED display panel;
the OLED display panel includes:
the OLED light-emitting unit is arranged on the array substrate and comprises a pixel defining layer and pixels of three primary colors;
and the light absorbing layer is shielded on the pixel defining layer and is used for absorbing red light and green light.
By the technical scheme, the OLED display panel and the electronic equipment at least have the following advantages:
in the technical scheme of the invention, the OLED display panel comprises an array substrate and OLED light-emitting units arranged on the array substrate, wherein light-absorbing layers are arranged on pixel defining layers of the OLED light-emitting units and can absorb red light and green light. In the OLED display panel provided in the embodiment of the present invention, the absorption of red light and green light is increased by the light of the three primary colors emitted by the OLED light emitting unit under a large viewing angle, that is, the attenuation speed of the red light and the green light increases with the increase of the viewing angle, and further, the brightness of the red light, the green light and the blue light is at the same attenuation speed under the large viewing angle, so that the white light synthesized by the light of the three primary colors has high purity. In summary, the OLED display panel provided in the embodiment of the present invention solves the technical problem that white light is red or green when viewed at a large viewing angle, and improves the display effect of the display panel.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an OLED display panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the OLED display panel and the electronic device according to the present invention with reference to the accompanying drawings and preferred embodiments will be made as follows. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Example one
As shown in fig. 1 and 2, an OLED display panel according to an embodiment of the present invention includes: an OLED light emitting unit 2 disposed on the array substrate 1, the OLED light emitting unit 2 including a pixel defining layer 21 and pixels of three primary colors, such as a blue pixel 22, a red pixel 23, and a green pixel 24; and a light absorbing layer 3, the light absorbing layer 3 being blocked on the pixel defining layer 21, for absorbing red light and green light.
Specifically, the structure of the array substrate 1 of the OLED display panel provided in the embodiment of the present invention may be set by referring to the prior art, or may be set according to specific use requirements, for example, a TFT array and other circuit portions may be fabricated on a rigid substrate in a deposition and mask manner, or a TFT array and other circuit portions may be fabricated on a flexible substrate; the OLED light emitting unit 2, i.e. the OLED device structure, may be directly fabricated on the array substrate 1 by evaporation, and the OLED light emitting unit 2 may be a structure in which two electrode layers sandwich the pixel defining layer 21, and pixels of three primary colors are disposed in the pixel defining layer 21 at intervals, where the pixels of three primary colors include a blue pixel 22, a red pixel 23, and a green pixel 24. The light absorbing layer 3 is used for absorbing red light and green light and accelerating the intensity attenuation speed of the red light and the green light under the condition of a large viewing angle, the light absorbing layer 3 needs to be shielded on the pixel defining layer 21 and cannot be shielded above the blue light pixel 22, the red light pixel 23 and the green light pixel 24, namely, the light absorbing layer 3 only absorbs the red light and the green light under the condition of the large viewing angle and cannot influence the light emitted by the blue light pixel 22, the red light pixel 23 and the green light pixel 24 under other non-large viewing angles; the light absorbing layer 3 can be directly formed by evaporation, coating, or sputtering, etc. during the fabrication of the OLED light emitting unit 2.
In the technical scheme of the invention, the OLED display panel comprises an array substrate and OLED light-emitting units arranged on the array substrate, wherein light-absorbing layers are arranged on pixel defining layers of the OLED light-emitting units and can absorb red light and green light. In the OLED display panel provided in the embodiment of the present invention, the absorption of red light and green light is increased by the light of the three primary colors emitted by the OLED light emitting unit under a large viewing angle, that is, the attenuation speed of the red light and the green light increases with the increase of the viewing angle, and further, the brightness of the red light, the green light and the blue light is at the same attenuation speed under the large viewing angle, so that the white light synthesized by the light of the three primary colors has high purity. In summary, the OLED display panel provided in the embodiment of the present invention solves the technical problem that white light is red or green when viewed at a large viewing angle, and improves the display effect of the display panel.
As shown in fig. 1 and fig. 2, in the specific implementation, the light absorbing layer 3 is a blue color film layer, or the light absorbing layer 3 is a film layer with blue quantum dots; wherein the light absorbing layer 3 covers the entire upper portion of the pixel defining layer 21.
Specifically, the main body of the blue color film layer is made of a transparent insulating material, and the color of the blue color film layer is formed by using a resin dye, for example, the blue color film layer is formed by mixing a resin material with a certain proportion of a blue resin dye, and the film layer only absorbs red light and green light and does not influence the blue light; the blue quantum dots are arranged in the film layer to absorb red light and green light, and do not affect blue light, the adding amount of the blue quantum dots can be specifically set according to the specific absorption amount of the red light and the green light, wherein the material used by the blue quantum dots can be molybdenum disulfide or cadmium zinc sulfide/zinc sulfide. In summary, after the blue color film layer or the film layer with blue quantum dots is disposed on the pixel defining layer 21, under the condition of a large viewing angle, the red light and the green light are emitted onto the pixel defining layer 21, and are partially absorbed by the blue color film layer or the film layer with blue quantum dots, while the blue light emitted onto the pixel defining layer 21 is not affected, which is equivalent to accelerating the intensity attenuation of the red light and the green light, so that the intensity attenuation speeds of the red light, the green light and the blue light are the same under the condition of a large viewing angle, and the technical problem that the white light emits red or green under a large viewing angle is solved.
Further, as shown in fig. 1 and 2, a blue color film layer or a film layer with blue quantum dots is used as the light absorbing layer 3, and the light absorbing layer 3 preferably has a thickness of 1-2 μm. As shown in fig. 1 and in a specific OLED display panel arrangement, the light absorbing layer 21 may be disposed at a position corresponding to the pixel defining layer 21 after the encapsulation layer 4 is disposed on the OLED light emitting unit 2, or the light absorbing layer 3 may be disposed between the pixel defining layer 21 and the encapsulation layer 4 as shown in fig. 2, i.e., after the OLED light emitting unit 2 is fabricated, the light absorbing layer 3 is fabricated before encapsulation, and finally encapsulated.
As shown in fig. 3-5, in a specific implementation, the three primary color pixels include a blue pixel 22, a red pixel 23, and a green pixel 24 that are arranged at intervals in the pixel defining layer 21; the light absorbing layer 3 is a film layer with light absorbing particles and is used for absorbing red light, green light and blue light.
Specifically, the light absorbing particles may be particles that have an absorbing function on light, such as carbon black particles or black chromium particles, and the light absorbing layer 3 absorbs not only red light and green light, but also blue light. Therefore, when a film layer with light absorbing particles is used as the light absorbing layer 3, the light absorbing layer 3 is required to cover a partial region above the pixel defining layer 21, and the pixel defining layer 21 cannot be entirely covered to avoid absorption of blue light.
When a film layer with light absorbing particles is used as the light absorbing layer 3, specific embodiments thereof may be: the light absorption layer 3 covers a partial area of the pixel defining layer 21 between the red pixel 23 and the blue pixel 22 to form a first area 5, and the first area 5 is located at a side close to the red pixel 23; the light absorbing layer 3 covers a partial area of the pixel defining layer 21 between the green pixel 24 and the blue pixel 22 to form a second area 6, and the second area 6 is located at a side close to the green pixel 24; and the light absorbing layer 3 covers the pixel defining layer 21 between the red pixels 23 and the green pixels 24 in its entirety. Therefore, red light and green light emitted by the red light pixel 24 and the green light pixel 24 are emitted out after being emitted on the pixel defining layer 21 at a large visual angle and passing through the light absorption layer 3 with the light absorption particles, the light absorption particles absorb a part of the red light and the green light, namely the intensity attenuation speed of the red light and the green light at the large visual angle is accelerated, the light absorption layer 3 is not arranged at one side of the pixel defining layer 3 close to the blue light pixel 22, so that the blue light is not absorbed, the intensity attenuation speeds of the red light, the green light and the blue light at the large visual angle are the same, the white light synthesized by the light of the three primary colors is not inclined to red or green, and the purity of the white light at the large visual angle is ensured.
Further, when a film layer with light absorbing particles is used as the light absorbing layer 3, the first regions 5 formed by blocking the pixel defining layers 21 preferably each occupy half of the pixel defining layers 21 between the red pixels 23 and the blue pixels 22, and the second regions 6 formed by blocking the pixel electrode 21 preferably occupy half of the pixel defining layers 21 between the green pixels 24 and the blue pixels 22. By the arrangement, the light absorption layer 3 can only absorb the red light emitted by the red light pixel 23 and the green light emitted by the green light pixel 24, and the blue light emitted by the blue light pixel 22 can not be absorbed. Wherein the light absorbing layer 3 preferably has a thickness of 1 to 2 μm.
And in a specific OLED display panel arrangement, the light absorbing layer 3 may be disposed at a position corresponding to the pixel defining layer 21 after the encapsulation layer 4 is disposed on the OLED light emitting unit 2 as shown in fig. 3, or the light absorbing layer 3 may be disposed between the pixel defining layer 21 and the encapsulation layer 4 as shown in fig. 4, that is, after the OLED light emitting unit 2 is fabricated, the light absorbing layer 3 is fabricated before encapsulation, and finally encapsulated.
In another embodiment, as shown in fig. 5, when the film layer with light-absorbing particles is used as a light-absorbing layer, the light-absorbing particles can be directly dispersed in the encapsulation layer 4, and the position with light-absorbing particles in the encapsulation layer 4 corresponds to the pixel defining layer 21, i.e. the light-absorbing layer is directly used as the encapsulation layer 4 to be encapsulated on the OLED light-emitting unit 2. The embodiment can simplify the manufacturing process of the OLED display panel and improve the production efficiency.
Example two
An embodiment of the present invention provides an electronic device, which includes: an OLED display panel; the OLED display panel as shown in fig. 1 includes: an OLED light emitting unit 2 disposed on the array substrate 1, the OLED light emitting unit 2 including a pixel defining layer 21 and pixels of three primary colors, such as a blue pixel 22, a red pixel 23, and a green pixel 24; and a light absorbing layer 3, the light absorbing layer 3 being blocked on the pixel defining layer 21, for absorbing red light and green light.
Specifically, the OLED display panel described in the second embodiment can directly use the OLED display panel provided in the first embodiment, and the specific implementation structure can refer to the related contents described in the first embodiment, and details are not described herein again.
In the technical scheme of the invention, the OLED display panel comprises an array substrate and OLED light-emitting units arranged on the array substrate, wherein light-absorbing layers are arranged on pixel defining layers of the OLED light-emitting units and can absorb red light and green light. In the OLED display panel provided in the embodiment of the present invention, the absorption of red light and green light is increased by the light of the three primary colors emitted by the OLED light emitting unit under a large viewing angle, that is, the attenuation speed of the red light and the green light increases with the increase of the viewing angle, and further, the brightness of the red light, the green light and the blue light is at the same attenuation speed under the large viewing angle, so that the white light synthesized by the light of the three primary colors has high purity. In summary, the OLED display panel provided in the embodiment of the present invention solves the technical problem that white light is red or green when viewed at a large viewing angle, and improves the display effect of the display panel.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (7)
1. An OLED display panel, comprising:
the OLED light-emitting unit is arranged on the array substrate and comprises a pixel defining layer and three primary color pixels, wherein the three primary color pixels comprise a blue light pixel, a red light pixel and a green light pixel which are arranged in the pixel defining layer at intervals;
a light absorbing layer, which is shielded on the pixel defining layer, for absorbing red light and green light;
the light absorption layer is a film layer with light absorption particles and is used for absorbing red light, green light and blue light, the light absorption layer covers partial area of the pixel definition layer between the red light pixel and the blue light pixel to form a first area, and the first area is positioned on one side close to the red light pixel; the light absorption layer covers a partial area of the pixel defining layer between the green pixel and the blue pixel to form a second area, and the second area is positioned at one side close to the green pixel; the light absorbing layer covers the pixel defining layer between the red and green pixels in its entirety.
2. The OLED display panel of claim 1,
the first region occupies half of the pixel definition layer between the red and blue pixels;
the second region occupies half of the pixel defining layer between the green and blue pixels.
3. The OLED display panel of claim 1,
the light absorbing particles are carbon black particles or black chromium particles.
4. The OLED display panel of any one of claims 1-3,
the thickness of the light absorption layer is 1-2 μm.
5. The OLED display panel of any one of claims 1-3, further comprising:
the packaging layer covers the OLED light-emitting unit;
wherein the light absorbing layer is disposed on the encapsulation layer;
alternatively, the light absorbing layer is disposed between the pixel defining layer and the encapsulation layer.
6. The OLED display panel of claim 1,
the light absorption layer is used as an encapsulation layer to cover the OLED light-emitting unit.
7. An electronic device, comprising:
the OLED display panel of any one of claims 1-6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110299389B (en) * | 2019-06-26 | 2021-06-04 | 合肥视涯技术有限公司 | Organic light emitting display device |
| CN110299391A (en) * | 2019-06-27 | 2019-10-01 | 昆山国显光电有限公司 | A kind of display panel and display device |
| CN110212011B (en) * | 2019-07-12 | 2022-04-01 | 昆山国显光电有限公司 | Display panel and display device |
| CN111933670A (en) * | 2020-08-17 | 2020-11-13 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display device |
| CN112038369A (en) | 2020-08-20 | 2020-12-04 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113013310A (en) * | 2021-02-20 | 2021-06-22 | Tcl华星光电技术有限公司 | Display panel and display device |
| CN113299699B (en) * | 2021-05-08 | 2022-05-31 | 武汉华星光电技术有限公司 | Display panel |
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