CN109830515B - Display panel and display device - Google Patents
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- CN109830515B CN109830515B CN201910123773.1A CN201910123773A CN109830515B CN 109830515 B CN109830515 B CN 109830515B CN 201910123773 A CN201910123773 A CN 201910123773A CN 109830515 B CN109830515 B CN 109830515B
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Abstract
The invention describes a display panel and a display device, the display panel comprising: the light-emitting diode comprises a substrate, a light-emitting layer and an auxiliary layer, wherein the light-emitting layer is positioned on one side of the substrate, and the auxiliary layer is positioned on one side of the light-emitting layer, which is far away from the substrate; wherein the light emitting layer includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit; the auxiliary layer includes a first auxiliary layer covering the red light emitting cells, a second auxiliary layer covering the green light emitting cells, and a third auxiliary layer covering the blue light emitting cells; the extinction degree of the third auxiliary layer is greater than the extinction degrees of the first auxiliary layer and the second auxiliary layer. The auxiliary layer is arranged above the pixel units with different colors, so that the attenuation degrees of light rays with different colors in the light-emitting layer under the same visual angle are similar, and the visual angle color cast of the display panel is reduced.
Description
Technical Field
The present invention relates to the field of display, and in particular, to a display panel and a display device including the same.
Background
In recent years, Organic Light-Emitting diodes (OLEDs) have become a very popular flat panel display industry in the sea and abroad, which is known as the next generation of "star" flat panel display technology, mainly because OLEDs have the characteristics of self-luminescence, wide viewing angle, fast response time, high luminous efficiency, thin panel thickness, capability of manufacturing large-sized and bendable panels, simple manufacturing process, low cost, and the like.
Since the light emission spectrum of an OLED display is relatively wide, improving color purity is crucial for practical applications. Generally, there are two types of packaging methods for OLEDs, one is glass cement packaging, and the other is thin film packaging. When thin film encapsulation is adopted, a uniform thin film is generally used for encapsulation above the light emitting unit in the organic electroluminescent device to block the penetration of moisture and oxygen. The organic electroluminescent device has the phenomenon of blue shift of a spectrum under a high visual angle, and the organic electroluminescent device actually packaged by the thin film has larger attenuation amount of red light and green light and smaller attenuation amount of blue light under the high visual angle, so that the blue light brightness is highest, and the red light brightness is lowest, and a display panel of the organic electroluminescent device is caused to emit blue under the high visual angle, thereby seriously influencing the display effect of the display panel, particularly the display effect during bending.
Therefore, it is an urgent need in the display field to improve the brightness uniformity of the display panel at high viewing angles.
Disclosure of Invention
In view of the foregoing, the present invention provides a display panel and a display device.
The present invention provides a display panel, comprising: the light-emitting diode comprises a substrate, a light-emitting layer and an auxiliary layer, wherein the light-emitting layer is positioned on one side of the substrate, and the auxiliary layer is positioned on one side of the light-emitting layer, which is far away from the substrate; wherein the light emitting layer includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit; the auxiliary layer includes a first auxiliary layer covering the red light emitting cells, a second auxiliary layer covering the green light emitting cells, and a third auxiliary layer covering the blue light emitting cells; the extinction degree of the third auxiliary layer is greater than or equal to the extinction degrees of the first auxiliary layer and the second auxiliary layer.
The invention also provides a display device which comprises any display panel provided by the invention.
Compared with the prior art, the invention has at least one of the following outstanding advantages:
according to the display panel and the display device, the auxiliary layer is arranged above the pixel units with different colors, so that the attenuation degrees of light rays with different colors in the light emitting layer under the same visual angle are similar, and the visual angle color cast of the display panel is reduced.
Drawings
FIG. 1 is a graph of RGB viewing angle luminance decay of a display panel of the prior art;
FIG. 2 is a schematic diagram of a display panel according to the present invention;
FIG. 3 is a RGB viewing angle luminance decay diagram of a display panel according to the present invention;
FIG. 4 is a schematic view of another display panel structure provided by the present invention;
FIG. 5 is a schematic view of another display panel structure provided by the present invention;
FIG. 6 is a schematic view of another display panel structure provided by the present invention;
FIG. 7 is a schematic view of another display panel structure provided by the present invention;
FIG. 8 is a schematic view of another display panel structure provided by the present invention;
FIG. 9 is a schematic view of another display panel structure provided by the present invention;
fig. 10 is a schematic structural diagram of a display device according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Further, in the following description, the same reference numerals are used in the drawings to designate the same or similar structures, and thus their repetitive description will be omitted. In addition, in order to make the respective components shown in the drawings clearer, the scale of the structural diagram of the display panel is appropriately adjusted.
Organic electroluminescent devices (OLEDs) exhibit a blue shift in the spectrum at high viewing angles. In the existing display panel, the speed of the light emitted by the OLED light-emitting units of different colors decaying with the brightness of the viewing angle is different. Where blue light decay is particularly slow. Referring to fig. 1, a luminance decay graph of RGB viewing angles of a display panel in the prior art is shown. As can be seen from fig. 1, in the optical viewing angle luminance curve of the conventional display panel, when the viewing angle is 70 °, the luminance of blue light is above 40%, and the luminance of red light has been attenuated to below 20% at the same viewing angle. Therefore, after the gamma adjustment (with the 0 degree viewing angle as the standard adjustment) is performed on the display panel, the blue light brightness is higher under the high viewing angle, and the problem that the display panel is blue at the high viewing angle is presented.
Therefore, according to the display panel and the display device, the auxiliary layer is arranged above the pixel units with different colors, so that the attenuation degrees of light rays with different colors in the light emitting layer under the same visual angle are similar, and the problem of visual angle color cast of the display panel is reduced.
Referring to fig. 2, a structure of a display panel according to the present invention is shown.
The display panel comprises a substrate 100, a light-emitting layer 200 positioned on one side of the substrate 100 and an auxiliary layer 300 positioned on one side of the light-emitting layer 200 far away from the substrate 100; wherein the light emitting layer 200 includes a red light emitting unit 201, a green light emitting unit 202, and a blue light emitting unit 203; the auxiliary layer 300 includes a first auxiliary layer 310 covering the red light emitting cells 201, a second auxiliary layer 320 covering the green light emitting cells 202, a third auxiliary layer 330 covering the blue light emitting cells 203; the extinction degree of the third auxiliary layer 330 is greater than the extinction degrees of the first and second auxiliary layers 310 and 320.
Specifically, the substrate 100 includes a substrate, a buffer layer covering the substrate, and a thin film transistor array over the buffer layer. The substrate to which the present application relates may be a flexible substrate, the substrate of which is made of any suitable insulating material having flexibility, and which may be transparent, translucent or opaque. Above the thin film transistor array, a light emitting layer 200 is disposed, and in general, the light emitting layer 200 in the OLED display panel includes an anode, an organic light emitting layer, and a cathode, which are sequentially disposed. Wherein the organic light emitting layer may further include at least one of an organic light emitting material layer, a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Transport Layer (ETL), and an electron injection layer (FIL). Of course, the present invention may also include other film layers in the prior art, which are not described in detail in this specification. Further, in order to realize color display, the organic light emitting material layer in the organic light emitting layer includes at least three organic light emitting materials of red, green, and blue, thereby constituting a red light emitting unit 201, a green light emitting unit 202, and a blue light emitting unit 203.
Generally, light is attenuated when propagating through a medium, and in a light-absorbing medium, the attenuation of light energy (absorption of light) is generally expressed by an extinction coefficient K. When the thickness of the medium is d, the wavelength of the light is lambda, and the initial light intensity is I0When the intensity of the light after passing through the medium is I, the intensity of the light satisfies the following light attenuation formula:
in the present application, the extinction degree is the product of the extinction coefficient K and the dielectric thickness d, i.e. Kd. It should be noted that, in an actual implementation process, the adjustment of the extinction degree can be realized by selecting materials with different K values or designing extinction media with different thicknesses.
Specifically, the extinction degree of the third auxiliary layer 330 above the blue light emitting unit 203 is greater than the extinction degrees of the first auxiliary layer 310 of the red light emitting unit 201 and the second auxiliary layer 320 of the green light emitting unit 202, and then the attenuation degree of the blue light is greater than the attenuation degrees of the red light and the green light when the light passes through the auxiliary layers, so that the intensity of the blue light passing through the display panel is close to the intensity of the red light and the green light, thereby reducing the brightness difference between the lights of different colors and reducing the color shift problem of the display panel at a high viewing angle.
With continued reference to fig. 2, a first auxiliary layer 310 is disposed on the red light-emitting unit 201, a first auxiliary layer 320 is disposed on the green light-emitting unit 202, and a first auxiliary layer 330 is disposed on the blue light-emitting unit 203, for example, the thickness of the three light auxiliary layers is the same as shown in fig. 2. Optionally, the material of the first auxiliary layer 310, the second auxiliary layer 320, and the third auxiliary layer 330 is amorphous silicon. The inventor conducted the RGB viewing angle luminance decay test by placing the display panel under the same conditions as in fig. 1, and please refer to fig. 3 for the test result.
Referring to fig. 3, the present invention provides an RGB viewing angle luminance attenuation chart of a display panel. An auxiliary layer of 80nm is deposited on the luminous layer of the display panel, and the auxiliary layer is made of amorphous silicon material. Amorphous silicon is known to attenuate brightness to different wavelengths to the greatest extent for blue light, the second green light, and the smallest red light. As can be seen from fig. 3, under the same test conditions as the display panel in fig. 1, the display panel provided by the present invention increases the speed of luminance decay with viewing angle by adding the auxiliary layer on the light emitting layer. Wherein, under a high visual angle (the visual angle is 70 degrees), the blue light brightness is reduced to 25 percent from the original 42 percent, and the brightness is reduced by 17 percent; the green light brightness is reduced from 31% to 21%, and the brightness is reduced by 10%; the red brightness decreased from 18% to 14%, the brightness decreased by 4%. The above data show that the auxiliary layer is arranged above the pixel unit, so that the attenuation speed of blue light brightness under a high viewing angle is increased, the brightness difference between different colors of light under the high viewing angle is reduced, and the brightness uniformity of the display panel is improved.
Optionally, referring to fig. 4, a structural diagram of another display panel provided by the present invention is shown.
In another display panel provided by the present invention, the thickness of the first auxiliary layer 310 is d1, the thickness of the second auxiliary layer 320 is d2, and the thickness of the third auxiliary layer 330 is d3, wherein d1 is not less than d2 is not less than d 3. The attenuation of light can be increased by increasing the thickness of the auxiliary layer according to the formula described hereinbefore. Because the attenuation degree of the brightness of the red light, the green light and the blue light in the medium is gradually reduced, the thickness of the auxiliary layer can be gradually increased to reduce the brightness difference among the three colors when the display panel emits light, so that the color cast problem of the display panel under a high viewing angle is reduced. Fig. 4 only exemplarily shows a case where the thickness of the first auxiliary layer 310 is smaller than that of the second auxiliary layer 320, and the thickness of the second auxiliary layer 320 is smaller than that of the third auxiliary layer 330.
It is understood that the extinction degree of the auxiliary layer is the result of the combined effect of the extinction coefficient and the thickness of the auxiliary layer, and in the embodiment of fig. 4, the extinction coefficients of the first auxiliary layer 310, the second auxiliary layer 320 and the third auxiliary layer 330 may be the same, and when d1 ≦ d2 < d3, the extinction degree of the third auxiliary layer 330 is greater than the extinction degrees of the second auxiliary layer 320 and the first auxiliary layer 310; the first auxiliary layer 310, the second auxiliary layer 320 and the third auxiliary layer 330 may be formed of the same material and processed by the same process, so that the manufacturing process of the display panel may be simplified. In another embodiment, the extinction coefficients of the first auxiliary layer 310, the second auxiliary layer 320, and the third auxiliary layer 330 may be different, and only the product of the extinction coefficient and the thickness of the third auxiliary layer 330, that is, the extinction degree, is greater than that of the second auxiliary layer 320 and the first auxiliary layer 310. Therefore, in the present embodiment, the extinction coefficient of the auxiliary layer is not particularly limited.
It should be noted that, when d1 is d2 is d3, please refer to fig. 2, that is, the thicknesses of the first auxiliary layer 310, the second auxiliary layer 320 and the third auxiliary layer 330 are the same, the extinction coefficient of the first auxiliary layer 310 corresponding to the red wavelength is K1, the extinction coefficient of the second auxiliary layer 320 corresponding to the green wavelength is K2, and the extinction coefficient of the third auxiliary layer 330 corresponding to the blue wavelength is K3, where K1 < K2 < K3. At the moment, the extinction degree of the auxiliary layer to the blue light is larger than that to the green light, and the extinction degree of the auxiliary layer to the green light is larger than that to the red light, so that when the light penetrates through the display panel, the light intensity difference among the red light, the green light and the blue light is reduced, the purpose of adjusting the brightness when the light penetrates through the display panel is achieved, and the problem of color cast of the display panel under a high visual angle is reduced.
In the embodiment of the present invention, the extinction coefficient of the auxiliary layer in the display panel is K, where K is greater than 0 and less than or equal to 1. It will be appreciated that the greater the extinction coefficient K of the medium, the less light passes through the medium and the more opaque the medium. For example, the extinction coefficient K of common metal materials, aluminum (Al), is 1.95, and generally, aluminum is an opaque material; therefore, the auxiliary layer is made of a material with a large extinction coefficient, the auxiliary layer needs to be thin enough, the thickness range of the light transmission of the aluminum material is 0-10 nm, the process difficulty and the production cost are increased, and the adjusting function of the auxiliary layer on the emergent brightness of the display panel is reduced. In order not to affect the display effect of the display panel, the extinction coefficient of the auxiliary layer in the present application is less than or equal to 1. Specifically, the auxiliary layer according to the present application may be silicon or an organic material, and the extinction coefficient of silicon (Si) is 0.15, while the extinction coefficient of each layer in a common organic material such as an OLED evaporation material, for example, a hole transport layer, an organic optical coupling layer, etc., is about 0.3. Of course, other materials consistent with the description of the present application are possible, and are not specifically limited herein.
In another embodiment, please refer to fig. 5, fig. 5 is a schematic view illustrating a structure of another display panel provided by the present invention. In the display panel, the first auxiliary layer 310 includes only the first encapsulating layer 312, the second auxiliary layer 320 includes the second encapsulating layer 322 and the second extinction auxiliary layer 321, and the third auxiliary layer 330 includes the third encapsulating layer 332 and the third extinction auxiliary layer 331, wherein the thickness of the second extinction auxiliary layer 321 is smaller than or equal to that of the third extinction auxiliary layer 331.
Generally, the first encapsulation layer 312, the second encapsulation layer 322 and the third encapsulation layer 332 may be common thin film encapsulation layers, and may be formed by sequentially stacking an inorganic layer, an organic layer and an inorganic layer to encapsulate the light emitting layer 200, so as to prevent water and oxygen from corroding the light emitting material, thereby improving the reliability of the display panel; meanwhile, the film package can also enable the display panel to have bendable performance, so that the more general applicability of the display panel is improved. It should be noted that the encapsulation layer of the display panel in the present invention includes, but is not limited to, the above, and may also be a single inorganic layer as the encapsulation layer or other encapsulation forms, such as rigid encapsulation, which is not limited in this respect. In addition, in this embodiment, the first encapsulation layer 312, the second encapsulation layer 322, and the third encapsulation layer 332 are continuous thin film encapsulation structures, and may be formed and prepared simultaneously during the preparation process.
With continued reference to fig. 5, fig. 5 exemplarily shows an embodiment in which only the first encapsulating layer 312 is disposed above the red light-emitting unit 201, the second encapsulating layer 322 and the second extinction auxiliary layer 321 are disposed above the green light-emitting unit 202, and the third encapsulating layer 332 and the third extinction auxiliary layer 331 are disposed above the blue light-emitting unit 203, where the thickness of the second extinction auxiliary layer 321 is smaller than that of the third extinction auxiliary layer 331. Thereby achieving that the degree of attenuation of blue light is greater than the degree of attenuation of green light and greater than the degree of attenuation of red light in the process of light transmission through the light auxiliary layer 300. Finally, the light intensities of different colors penetrating through the display panel are similar, so that the problem of color cast of the display panel under a high angle is reduced.
Optionally, referring to fig. 6, a structural diagram of another display panel provided by the present invention is shown. In yet another embodiment, the first auxiliary layer 310 includes a first encapsulating layer 312 and a first matting layer 311, the second auxiliary layer 320 includes a second encapsulating layer 322 and a second matting auxiliary layer 321, and the third auxiliary layer 330 includes a third encapsulating layer 332 and a third matting auxiliary layer 331, wherein the thickness of the first matting layer 311 is smaller than the thickness of the second matting layer 321 and smaller than the thickness of the third matting layer 331, so that the light emitted by the light emitting units of different colors is attenuated differently when passing through the auxiliary layers, blue light is largest, green light is second, and red light is smallest. Finally, the light intensities of different colors penetrating through the display panel are similar, so that the problem of color cast of the display panel under a high angle is reduced.
It can be understood that the extinction degree of the auxiliary layer is a result of the combined action of the extinction coefficient and the thickness of the auxiliary layer, and in the embodiments of fig. 5 and 6, the extinction coefficients of the second extinction auxiliary layer 321 and the third extinction auxiliary layer 331 can be the same, so that the second extinction auxiliary layer 321 and the third extinction auxiliary layer 331 can be formed by the same material and through the same process, thereby simplifying the manufacturing process of the display panel. However, in another embodiment, the extinction coefficients of the second extinction auxiliary layer 321 and the third extinction auxiliary layer 331 may not be the same, and may be formed of different materials. It is only necessary that the product of the extinction coefficient and the thickness of the extinction auxiliary layer in the final third auxiliary layer 330, that is, the extinction degree, is greater than that of the second auxiliary layer 320. Therefore, in the present embodiment, the extinction coefficients of the second extinction auxiliary layer 321 and the third extinction auxiliary layer 331 are not specifically limited.
With continued reference to fig. 5 and fig. 6, the second extinction auxiliary layer 321 is disposed on a side of the second encapsulation layer 322 away from the substrate 100; the third extinction auxiliary layer 331 is located on a side of the second encapsulation layer 332 away from the substrate 100. Optionally, the thicknesses of the second extinction auxiliary layer 321 and the third extinction auxiliary layer 331 are both less than 100nm, so that the problem of color cast of the display panel is reduced, and the thickness of the display panel is not excessively increased, so that the bending performance and the applicability of the panel are not affected.
Optionally, referring to fig. 7, a structural diagram of another display panel provided by the present invention is shown. The second encapsulating layer in the display panel includes a second encapsulating layer 323 and a second encapsulating layer 324, and the second matting auxiliary layer 321 is located between the second encapsulating layer 323 and the second encapsulating layer 324; the third encapsulating layer includes a third encapsulating layer 333 and a third encapsulating layer 334, and the third light absorption auxiliary layer 331 is located between the third encapsulating layer 333 and the third encapsulating layer 334.
Specifically, in the embodiment of fig. 7, the second encapsulation layer and the third encapsulation layer may be a conventional structure in which an inorganic layer, an organic layer, and an inorganic layer are sequentially stacked. Further, the second encapsulating layer 323 is an inorganic structure such as silicon nitride, the second encapsulating layer 324 is a stacked structure of an organic layer and an inorganic layer, and the second matting auxiliary layer 321 may be located in the organic layer, embedded in the encapsulating structure by reducing the thickness of the organic layer; or when the matting auxiliary layer is an organic material, it may replace part of the organic layer in a conventional encapsulation layer. In another embodiment, the thickness of the organic layer may also be kept constant, that is, the thickness of the encapsulation layer itself is kept constant, and the thickness of the extinction auxiliary layer is increased in the display panel. It can be understood that, in the embodiment, when the extinction auxiliary layer is located inside the encapsulation layer, the purpose of reducing the color cast of the display panel at the high viewing angle can be achieved without additionally increasing the thickness of the film layer in the display panel, which is beneficial to the lightness and thinness of the display panel; and at this moment, the extinction auxiliary layer cannot be directly contacted with the light-emitting layer, and the thicknesses of the second extinction auxiliary layer 321 and the third extinction auxiliary layer 331 are both smaller than 100nm, so that the original thickness of the packaging layer cannot be excessively occupied, and the packaging reliability of the display panel is ensured. In this embodiment, the thickness of the encapsulation layer may be kept constant, and the increased thickness of each extinction auxiliary layer is finally reflected as the increased thickness of each auxiliary layer, so as to avoid causing encapsulation defects. Therefore, the thickness of the encapsulation layer is not limited in the present application.
For convenience of description and understanding of the technical solutions in the present application, fig. 2 and fig. 4 to fig. 7 only schematically illustrate the positional relationship between the light emitting layer and the auxiliary layer, and other film layer structures in the display panel are not shown in the drawings. In addition, the light emitting units are closely arranged in the drawing, but there may be gaps between the light emitting units in an actual product, and other arrangements may be included.
Optionally, referring to fig. 8, a structural diagram of another display panel provided by the present invention is shown.
The first auxiliary layer 310 further includes a first matting auxiliary layer 311, and the first matting auxiliary layer 311 includes a first a matting auxiliary layer 315 and a first b matting auxiliary layer 316; the second matting aid layer 321 includes a second matting aid layer 325 and a second diethyl matting aid layer 326;
the first extinction auxiliary layer 315 and the second extinction auxiliary layer 325 are made of inorganic materials, and the first second extinction auxiliary layer 316, the second extinction auxiliary layer 326 and the third extinction auxiliary layer 331 are made of organic materials, wherein the extinction coefficient of the organic materials is larger than that of the inorganic materials, that is, the extinction coefficients of the first extinction auxiliary layer 315 and the second extinction auxiliary layer 325 are larger than that of the first second extinction auxiliary layer 316, the second extinction auxiliary layer 326 and the third extinction auxiliary layer 331.
Optionally, the display panel further includes a touch structure, where the touch structure includes a first metal layer 410, an insulating layer, and a second metal layer 420 stacked in sequence; the insulating layer includes a first extinction aid layer 315 and a second extinction aid layer 325.
It should be noted that the third extinction auxiliary layer 331 may include a third extinction auxiliary layer 335 and a third extinction auxiliary layer 336, and in this case, the third extinction auxiliary layer 335 and the third extinction auxiliary layer 336 may be made of the same material or different materials; however, the third extinction auxiliary layer 336 and the second extinction auxiliary layer 326 are both made of organic materials with larger extinction coefficients, and the thickness of the third extinction auxiliary layer 336 is larger than that of the second extinction auxiliary layer 326, so that the extinction degree of the third auxiliary layer 330 is larger than that of the second auxiliary layer 320.
It can be understood that, in the technical scheme, the touch structure and the extinction auxiliary layer are integrated together, and the extinction auxiliary layer is used as an insulating layer between metal layers in the touch structure, so that the thickness of the display panel is not increased while the high-viewing-angle color cast of the display panel is reduced by using the auxiliary layer, and the display panel is light and thin.
Optionally, referring to fig. 9, a structural schematic diagram of another display panel provided by the present invention is shown.
The first auxiliary layer 310 in the display panel further comprises a first extinction auxiliary layer 311, and the third extinction auxiliary layer 331 comprises a third extinction auxiliary layer 335 and a third extinction auxiliary layer 336; the first extinction auxiliary layer 311, the second extinction auxiliary layer 321, and the third extinction auxiliary layer 336 are made of organic materials, the third extinction auxiliary layer 335 is made of inorganic materials, and the extinction coefficient of the organic materials is smaller than that of the inorganic materials. It is understood that the extinction coefficient of the inorganic material is greater than that of the organic material, that is, the extinction coefficient of the third extinction auxiliary layer 335 is greater than that of the first, second, and third extinction auxiliary layers 311, 321, and 336, so that the extinction degree of the third extinction auxiliary layer 331 is greater than that of the first and second extinction auxiliary layers 311 and 321. Therefore, when the light emitted by the pixel unit penetrates through the auxiliary layer, the attenuation of the blue light is maximum, the brightness difference among different colors of light is reduced, and the purpose of improving the brightness uniformity of the display panel under the high visual angle is achieved.
Optionally, the display panel further includes a touch structure, where the touch structure includes a first metal layer 410, an insulating layer, and a second metal layer 420 stacked in sequence; the insulating layer includes a first extinction auxiliary layer 335. In the embodiment, the touch structure and the extinction auxiliary layer are integrated together, and the extinction auxiliary layer is used as an insulating layer between metal layers in the touch structure, so that the thickness of the display panel is not increased while the high-viewing-angle color cast of the display panel is reduced by using the auxiliary layer, and the display panel is light and thin.
It can be understood that, when the extinction auxiliary layer is reused as the insulating layer of the touch structure, the thickness of the extinction auxiliary layer can be 100-500 nm, so that short circuit between the touch metal layers can be prevented, and adjustment of the extinction auxiliary layer on the emergent light brightness of the display panel is facilitated.
It should be noted that fig. 8 and 9 are only schematic representations of the relationship between the film layers in the display panel, and do not represent the specific structure and size in the actual display panel.
Based on the same inventive concept, the present application further provides a display device, and referring to fig. 10, fig. 10 is a schematic diagram of a display device provided in an embodiment of the present application, where the display device includes any of the display panels described in the present application. In the present application, the embodiments of the display device can refer to the embodiments of the display panel, and repeated descriptions are omitted here. It should be noted that, the display device provided in the embodiments of the present application may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following advantages:
the display panel and the display device of the invention, the display panel includes: the light-emitting diode comprises a substrate, a light-emitting layer and an auxiliary layer, wherein the light-emitting layer is positioned on one side of the substrate, and the auxiliary layer is positioned on one side of the light-emitting layer away from the substrate; wherein the light emitting layer includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit; the auxiliary layer includes a first auxiliary layer covering the red light emitting unit, a second auxiliary layer covering the green light emitting unit, and a third auxiliary layer covering the blue light emitting unit; the extinction degree of the third auxiliary layer is greater than the extinction degrees of the first auxiliary layer and the second auxiliary layer. The light auxiliary layer is arranged above the pixel units with different colors, so that the attenuation degrees of light rays with different colors in the light emitting layer under the same visual angle are similar, and the visual angle color cast of the display panel is reduced.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (11)
1. A display panel, comprising: the light-emitting diode comprises a substrate, a light-emitting layer and an auxiliary layer, wherein the light-emitting layer is positioned on one side of the substrate, and the auxiliary layer is positioned on one side of the light-emitting layer, which is far away from the substrate; wherein the content of the first and second substances,
the light emitting layer includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit;
the auxiliary layer includes a first auxiliary layer covering the red light emitting cells, a second auxiliary layer covering the green light emitting cells, and a third auxiliary layer covering the blue light emitting cells;
the extinction degree of the third auxiliary layer is greater than the extinction degrees of the first auxiliary layer and the second auxiliary layer;
the thickness of the first auxiliary layer is d1, the thickness of the second auxiliary layer is d2, and the thickness of the third auxiliary layer is d3, wherein d1 is not less than d2 is not less than d 3;
the first auxiliary layer comprises a first packaging layer, the second auxiliary layer comprises a second packaging layer and a second extinction auxiliary layer, the third auxiliary layer comprises a third packaging layer and a third extinction auxiliary layer, and the thickness of the second extinction auxiliary layer is smaller than or equal to that of the third extinction auxiliary layer.
2. The display panel according to claim 1, wherein the first auxiliary layer, the second auxiliary layer, and the third auxiliary layer have the same thickness;
the extinction coefficient of the first auxiliary layer corresponding to the red light wavelength is K1, the extinction coefficient of the second auxiliary layer corresponding to the green light wavelength is K2, and the extinction coefficient of the third auxiliary layer corresponding to the blue light wavelength is K3, wherein K1 is more than K2 and more than K3.
3. The display panel of claim 1, wherein the second matting auxiliary layer is located on a side of the second encapsulation layer away from the substrate; the third light extinction auxiliary layer is positioned on one side, far away from the substrate, of the third packaging layer.
4. The display panel of claim 1, wherein the second encapsulation layer comprises a second encapsulant layer and a second diethyl encapsulation layer, the second matte auxiliary layer being between the second encapsulant layer and the second diethyl encapsulation layer;
the third packaging layer comprises a third packaging layer and a third packaging layer, and the third extinction auxiliary layer is located between the third packaging layer and the third packaging layer.
5. The display panel of claim 1, wherein the first auxiliary layer further comprises a first matte auxiliary layer comprising a first matte auxiliary layer and a first second matte auxiliary layer; the second matting auxiliary layer comprises a second matting auxiliary layer and a second diethyl matting auxiliary layer;
the first extinction auxiliary layer and the second extinction auxiliary layer are made of inorganic materials, the first extinction auxiliary layer, the second extinction auxiliary layer and the third extinction auxiliary layer are made of organic materials, and the extinction coefficient of the organic materials is larger than that of the inorganic materials.
6. The display panel according to claim 5, wherein the display panel further comprises a touch structure, the touch structure comprising a first metal layer, an insulating layer, and a second metal layer stacked in this order;
the insulating layer includes the first and second extinction auxiliary layers.
7. The display panel of claim 1, wherein the first auxiliary layer further comprises a first matte auxiliary layer, and the third matte auxiliary layer comprises a third matte auxiliary layer and a third matte auxiliary layer;
the first extinction auxiliary layer, the second extinction auxiliary layer and the third extinction auxiliary layer are made of organic materials, the third extinction auxiliary layer is made of inorganic materials, and the extinction coefficient of the organic materials is smaller than that of the inorganic materials.
8. The display panel according to claim 5, wherein the display panel further comprises a touch structure, the touch structure comprising a first metal layer, an insulating layer, and a second metal layer stacked in this order;
the insulating layer includes the first matting auxiliary layer.
9. The display panel of claim 1, wherein the auxiliary layer has an extinction coefficient K, where 0 < K ≦ 1.
10. The display panel of any of claims 1-9, wherein the material of the auxiliary layer comprises amorphous silicon.
11. A display device characterized in that it comprises a display panel according to any one of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910123773.1A CN109830515B (en) | 2019-02-19 | 2019-02-19 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910123773.1A CN109830515B (en) | 2019-02-19 | 2019-02-19 | Display panel and display device |
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| CN110491930B (en) | 2019-09-20 | 2021-04-16 | 昆山国显光电有限公司 | Display panel and display device |
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