CN111755626A - Display panel and display device - Google Patents
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- CN111755626A CN111755626A CN202010641693.8A CN202010641693A CN111755626A CN 111755626 A CN111755626 A CN 111755626A CN 202010641693 A CN202010641693 A CN 202010641693A CN 111755626 A CN111755626 A CN 111755626A
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- H10K50/00—Organic light-emitting devices
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- H—ELECTRICITY
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- H10K50/00—Organic light-emitting devices
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- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The present application relates to a display panel and a display device; the display panel comprises an anti-reflection structure; when the number of the anti-reflection structures is one, the anti-reflection structures are clamped between any adjacent film layers in the display panel; or when the number of the anti-reflection structures is two or more, the anti-reflection structures are respectively clamped between different adjacent film layers in the display panel; the anti-reflection structures comprise at least one layer of anti-reflection film, and when the number of the anti-reflection structures is two or more, the anti-reflection structures comprise the anti-reflection films with different, partially different or same layers; the antireflection film comprises antireflection units equal to the number of the sub-pixels of the display panel, and by means of the added antireflection structure and the light interference principle, light reflected by the front surface and the rear surface of the antireflection structure is subjected to interference cancellation, so that the light emitting efficiency of the display panel is improved.
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
In recent years, the OLED (Organic Light-Emitting Diode) display technology has been widely used due to its advantages of self-luminescence, high contrast, thin thickness, wide viewing angle, fast response speed, etc. The luminous efficiency is an important parameter of the OLED display technology, and the device with high luminous efficiency has the advantages of high brightness, low energy consumption, long service life and the like.
However, in the top emission type OLED display technology, light emitted from the OLED needs to be transmitted through the multi-layer film structure before entering human eyes. It is known that light is reflected when propagating to the interface between different substances, that is, the light changes the propagation direction at the interface between two substances and returns to the original substance, so that in the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the conventional OLED display technology has low luminous efficiency.
Disclosure of Invention
In view of the above, it is necessary to provide a display panel and a display device for solving the problem of low light emitting efficiency of the conventional OLED display technology.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a display panel, including an anti-reflection structure;
when the number of the anti-reflection structures is one, the anti-reflection structures are clamped between any adjacent film layers in the display panel; or
When the number of the anti-reflection structures is two or more, the anti-reflection structures are respectively clamped between different adjacent film layers in the display panel;
the anti-reflection structures comprise at least one layer of anti-reflection film, and when the number of the anti-reflection structures is two or more, the anti-reflection structures comprise the anti-reflection films with different, partially different or same layers; the antireflection film comprises antireflection units which are arranged in one-to-one correspondence with the sub-pixels of the display panel.
In one embodiment, the anti-reflection structure is one or any combination of the following units: a first anti-reflection structure, a second anti-reflection structure and a third anti-reflection structure;
the first anti-reflection structure is clamped between the anode film layer and the planarization film layer of the display panel;
the second anti-reflection structure is clamped between the planarization film layer and the TFT film layer of the display panel;
the third anti-reflection structure is clamped between the TFT film layer and the top glass of the display panel.
In one embodiment, the first antireflective structure comprises a layer of antireflective film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the first antireflection structure is obtained based on the following formula:
n1the refractive index of the antireflection film in the first antireflection structure is represented; n is0Representing the refractive index of the anode film layer; n is2The refractive index of the planarizing film layer is shown.
In one embodiment, the first antireflective structure comprises a first layer of antireflective film and a second layer of antireflective film; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the first antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the first antireflection structure is obtained based on the following formula:
n′1the refractive index of the first antireflection film layer in the first antireflection structure is represented; n ″)1The refractive index of the second antireflection film in the first antireflection structure is represented; n is0Representing the refractive index of the anode film layer; n is2The refractive index of the planarizing film layer is shown.
In one embodiment, the second antireflective structure comprises a layer of antireflective film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the second antireflection structure is obtained based on the following formula:
n3indicates the second increaseRefractive index of the antireflection film in the transmission structure; n is2Denotes the refractive index of the planarizing film layer; n is4Indicating the refractive index of the TFT film layer.
In one embodiment, the first antireflective structure comprises a first layer of antireflective film and a second layer of antireflective film; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the second antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the second antireflection structure is obtained based on the following formula:
n′3the refractive index of the first antireflection film in the second antireflection structure is represented; n ″)3The refractive index of the second antireflection film in the second antireflection structure is represented; n is2Denotes the refractive index of the planarizing film layer; n is4Indicating the refractive index of the TFT film layer.
In one embodiment, the third antireflective structure comprises a layer of antireflective film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the third antireflection structure is obtained based on the following formula:
n5the refractive index of the antireflection film in the third antireflection structure is represented; n is4Representing the refractive index of the TFT film layer; n is6Indicating the index of refraction of the top glass.
In one embodiment, the third antireflective structure comprises a first antireflective film layer and a second antireflective film layer; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the third antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the third antireflection structure is obtained based on the following formula:
n′5the refractive index of the first antireflection film in the third antireflection structure is represented; n ″)5The refractive index of the second antireflection film in the third antireflection structure is represented; n is4Representing the refractive index of the TFT film layer; n is6Indicating the index of refraction of the top glass.
In one embodiment, the antireflective structure material is magnesium oxide or a transparent organic material.
In another aspect, an embodiment of the present application further provides a display device, including the display panel.
One of the above technical solutions has the following advantages and beneficial effects:
the display panel provided by each embodiment of the application comprises an anti-reflection structure; when the number of the anti-reflection structures is one, the anti-reflection structures are clamped between any adjacent film layers in the display panel; or when the number of the anti-reflection structures is two or more, the anti-reflection structures are respectively clamped between different adjacent film layers in the display panel; the anti-reflection structures comprise at least one layer of anti-reflection film, and when the number of the anti-reflection structures is two or more, the anti-reflection structures comprise the anti-reflection films with different, partially different or same layers; the antireflection film comprises antireflection units equal to the number of the sub-pixels of the display panel, and by means of the added antireflection structure and the light interference principle, light reflected by the front surface and the rear surface of the antireflection structure is subjected to interference cancellation, so that the light emitting efficiency of the display panel is improved.
Drawings
Fig. 1 is a schematic structural diagram of a display panel in an example.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The term "sandwiched" and similar expressions are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to solve the problem of low luminous efficiency of the conventional OLED display technology, in one embodiment, as shown in fig. 1, a display panel 1 is provided, which includes an anti-reflection structure 11;
when the number of the anti-reflection structures 11 is one, the anti-reflection structures 11 are arranged between any adjacent film layers 13 in the display panel 1 in a clamping manner; or
When the number of the anti-reflection structures 11 is two or more, the anti-reflection structures 11 are respectively sandwiched between different adjacent film layers 13 in the display panel 1;
the anti-reflection structures 11 comprise at least one layer of anti-reflection film, and when the number of the anti-reflection structures 11 is two or more, the anti-reflection structures 11 comprise anti-reflection films with different, partially different or the same number of layers; the antireflection film includes antireflection units 111 disposed in one-to-one correspondence with the sub-pixels 15 of the display panel 1.
The anti-reflection structure is used for interfering light emitted by the sub-pixels, so as to avoid the problem of reduction of light emitting efficiency caused by emission when the light penetrates through different film layers in the display panel. In one example, the number of anti-reflection structures is one, and the anti-reflection structures are disposed between any adjacent film layers in the display panel, such as between an anode film layer and a planarization film layer.
In another example, the number of anti-reflection structures is two, where one anti-reflection structure is disposed between any adjacent film layers in the display panel, and another anti-reflection structure is disposed between any other adjacent film layers in the display panel, that is, two anti-reflection structures are disposed between different film layers, for example, one anti-reflection structure is disposed between the anode film layer and the planarization film layer, and another anti-reflection structure is disposed between the TFT film layer and the planarization film layer.
In yet another example, the number of anti-reflection structures is three, and three anti-reflection structures are respectively disposed between different film layers in the display panel, for example, one anti-reflection structure is disposed between the anode film layer and the planarization film layer, one anti-reflection structure is disposed between the TFT film layer and the planarization film layer, and one anti-reflection structure is disposed between the top glass layer and the planarization film layer. The number of the anti-reflection structures can be set according to the number of the film layers in the display panel.
Further, in order to enable the anti-reflection structure to have an anti-reflection effect, in an example, the material of the anti-reflection structure is magnesium oxide or a transparent organic material.
The antireflection structure comprises at least one layer of antireflection film, and the number of layers of the antireflection film can be determined according to actual requirements. Further, when the number of the anti-reflection structures is two or more, the number of layers of the anti-reflection films used in each anti-reflection structure does not interfere with each other, that is, the same number of layers of anti-reflection films may be used in each anti-reflection structure, different numbers of layers of anti-reflection films may be used in each anti-reflection structure, part of the anti-reflection films may be used in the same number of layers, and the other part of the anti-reflection films may be used in different numbers of layers.
The antireflection film is divided into N antireflection units, the number of the antireflection units is equal to the number of the sub-pixels in the display panel, and the antireflection units are arranged in a one-to-one correspondence mode. The sub-pixels at least comprise a red sub-pixel, a blue sub-pixel and a green sub-pixel.
Taking the example that the display panel includes the anode film layer, the planarization film layer, the TFT film layer, and the top glass as an example, in one embodiment, the anti-reflection structure is one or any combination of the following units: a first anti-reflection structure, a second anti-reflection structure and a third anti-reflection structure;
the first anti-reflection structure is clamped between the anode film layer and the planarization film layer of the display panel;
the second anti-reflection structure is clamped between the planarization film layer and the TFT film layer of the display panel;
the third anti-reflection structure is clamped between the TFT film layer and the top glass of the display panel.
It is noted that, in one example, the antireflective structure comprises a first antireflective structure; in two examples, the antireflective structure comprises a second antireflective structure; in three examples, the antireflective structures include a third antireflective structure; in four examples, the antireflective structures include a first antireflective structure and a second antireflective structure; in five examples, the antireflective structures include a first antireflective structure and a third antireflective structure; in six examples, the antireflective structures include a second antireflective structure and a third antireflective structure; in seven examples, the antireflective structures include a first antireflective structure, a second antireflective structure, and a third antireflective structure.
The number of layers of the antireflection film included in the first antireflection structure, the second antireflection structure and the third antireflection structure may be determined according to actual requirements, and in one example, the first antireflection structure includes one layer of antireflection film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel (between 105 mm and 170 mm);
the refractive index of the antireflection film in the first antireflection structure is obtained based on the following formula:
n1showing the permeability of the first permeability-increasing structureThe refractive index of the film; n is0Representing the refractive index of the anode film layer; n is2The refractive index of the planarizing film layer is shown.
The thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel, namely the thickness of the anti-reflection unit corresponding to the red sub-pixel is one fourth of the wavelength of light emitted by the red sub-pixel, the thickness of the anti-reflection unit corresponding to the blue sub-pixel is one fourth of the wavelength of light emitted by the blue sub-pixel, and the thickness of the anti-reflection unit corresponding to the green sub-pixel is one fourth of the wavelength of light emitted by the green sub-pixel. The thickness of the anti-reflection unit is generally between 105 mm and 170 mm.
In another example, a first antireflective structure comprises a first layer of antireflective film and a second layer of antireflective film; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the first antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the first antireflection structure is obtained based on the following formula:
n′1the refractive index of the first antireflection film layer in the first antireflection structure is represented; n ″)1The refractive index of the second antireflection film in the first antireflection structure is represented; n is0Representing the refractive index of the anode film layer; n is2The refractive index of the planarizing film layer is shown.
In one example, the second antireflective structure comprises a layer of antireflective film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the second antireflection structure is obtained based on the following formula:
n3the refractive index of the antireflection film in the second antireflection structure is represented; n is2Denotes the refractive index of the planarizing film layer; n is4Indicating the refractive index of the TFT film layer.
In another example, a first antireflective structure comprises a first layer of antireflective film and a second layer of antireflective film; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the second antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the second antireflection structure is obtained based on the following formula:
n′3the refractive index of the first antireflection film in the second antireflection structure is represented; n ″)3The refractive index of the second antireflection film in the second antireflection structure is represented; n is2Denotes the refractive index of the planarizing film layer; n is4Indicating the refractive index of the TFT film layer.
In one example, the third antireflective structure comprises a layer of antireflective film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the third antireflection structure is obtained based on the following formula:
n5the refractive index of the antireflection film in the third antireflection structure is represented; n is4Representing the refractive index of the TFT film layer; n is6Indicating the index of refraction of the top glass.
In another example, a third antireflective structure comprises a first antireflective film layer and a second antireflective film layer; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the third antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the third antireflection structure is obtained based on the following formula:
n′5the refractive index of the first antireflection film in the third antireflection structure is represented; n ″)5The refractive index of the second antireflection film in the third antireflection structure is represented; n is4Representing the refractive index of the TFT film layer; n is6Indicating the index of refraction of the top glass.
Taking the first anti-reflection structure sandwiched between the anode film layer and the planarization film layer of the display panel, and the first anti-reflection structure includes one anti-reflection film layer as an example, if there is no anti-reflection structure, the amount of light loss when passing through the two layers is obtained based on the following formula:
I＝RI0
wherein R represents the emissivity of the film interface; i represents the intensity of incident light; i is0Indicating the intensity of the emitted light. At n0＝2.1，n21.45 is, I is 3.35% I0Therefore, light loses 3.35% of its intensity when passing through the anode film layer and the planarization film layer. After the first antireflection structure is additionally arranged, the light intensity loss can be reduced by 3.35%.
In the embodiments of the display panel, the display panel comprises an anti-reflection structure; when the number of the anti-reflection structures is one, the anti-reflection structures are clamped between any adjacent film layers in the display panel; or when the number of the anti-reflection structures is two or more, the anti-reflection structures are respectively clamped between different adjacent film layers in the display panel; the anti-reflection structures comprise at least one layer of anti-reflection film, and when the number of the anti-reflection structures is two or more, the anti-reflection structures comprise the anti-reflection films with different, partially different or same layers; the antireflection film comprises antireflection units equal to the number of the sub-pixels of the display panel, and by means of the added antireflection structure and the light interference principle, light reflected by the front surface and the rear surface of the antireflection structure is subjected to interference cancellation, so that the light emitting efficiency of the display panel is improved.
In one embodiment, a display device is further provided, which includes the display panel described in the embodiments of the display panel of the present application.
It should be noted that the display panel in this embodiment is the same as the display panel described in the embodiments of the display panel of the present application, and please refer to the embodiments of the display panel of the present application for details, which are not described herein again.
The display device is high in luminous efficiency and good in display performance.
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 claims. 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. A display panel is characterized by comprising an anti-reflection structure;
when the number of the anti-reflection structures is one, the anti-reflection structures are clamped between any adjacent film layers in the display panel; or
When the number of the anti-reflection structures is two or more, the anti-reflection structures are respectively clamped between different adjacent film layers in the display panel;
the anti-reflection structures comprise at least one layer of anti-reflection film, and when the number of the anti-reflection structures is two or more, the anti-reflection structures comprise anti-reflection films with different, partially different or same layers; the antireflection film comprises antireflection units which are arranged in one-to-one correspondence with the sub-pixels of the display panel.
2. The display panel according to claim 1,
the anti-reflection structure is one or any combination of the following units: a first anti-reflection structure, a second anti-reflection structure and a third anti-reflection structure;
the first antireflection structure is clamped between an anode film layer and a planarization film layer of the display panel;
the second antireflection structure is clamped between the planarization film layer and the TFT film layer of the display panel;
the third antireflection structure is clamped between the TFT film layer of the display panel and the top glass.
3. The display panel of claim 2, wherein the first anti-reflection structure comprises a layer of anti-reflection film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the first antireflection structure is obtained based on the following formula:
n1representing the refractive index of the antireflection film in the first antireflection structure; n is0Representing the refractive index of the anode film layer; n is2Representing the refractive index of the planarizing film layer.
4. The display panel of claim 2, wherein the first antireflective structure comprises a first layer of antireflective film and a second layer of antireflective film; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the first antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the first antireflection structure is obtained based on the following formula:
n′1representing the refractive index of the first antireflection film layer in the first antireflection structure; n ″)1Representing the refractive index of the second antireflection film in the first antireflection structure; n is0Representing the refractive index of the anode film layer; n is2Representing the refractive index of the planarizing film layer.
5. The display panel of claim 2, wherein the second antireflective structure comprises a layer of antireflective film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the second antireflection structure is obtained based on the following formula:
n3representing the refractive index of the antireflection film in the second antireflection structure; n is2Representing the refractive index of the planarizing film layer; n is4Representing the refractive index of the TFT film layer.
6. The display panel according to any one of claims 2 to 4, wherein the first antireflection structure comprises a first antireflection film layer and a second antireflection film layer; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the second antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the second antireflection structure is obtained based on the following formula:
n′3representing the refractive index of the first antireflection film in the second antireflection structure; n ″)3Representing the refractive index of a second layer of antireflection film in the second antireflection structure; n is2Representing the refractive index of the planarizing film layer; n is4Representing the refractive index of the TFT film layer.
7. The display panel according to any one of claims 2 to 4, wherein the third antireflection structure comprises a layer of antireflection film; the thickness of each anti-reflection unit is one fourth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the antireflection film in the third antireflection structure is obtained based on the following formula:
n5representing a refractive index of the antireflection film in the third antireflection structure; n is4Representing the refractive index of the TFT film layer; n is6Representing the refractive index of the top glass.
8. The display panel according to any one of claims 2 to 4, wherein the third antireflection structure comprises a first antireflection film layer and a second antireflection film layer; the thickness of each anti-reflection unit is one sixth of the wavelength of light emitted by the corresponding sub-pixel;
the refractive index of the first antireflection film in the third antireflection structure is obtained based on the following formula:
the refractive index of the second antireflection film in the third antireflection structure is obtained based on the following formula:
n′5representing the refractive index of the first antireflection film in the third antireflection structure; n ″)5Representing the refractive index of the second layer of antireflection film in the third antireflection structure; n is4Representing the refractive index of the TFT film layer; n is6Representing the refractive index of the top glass.
9. The display panel according to any one of claims 1 to 4, wherein the material of the anti-reflection structure is magnesium oxide or a transparent organic material.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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