CN114267811A - Display panel and display device - Google Patents
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- CN114267811A CN114267811A CN202111541047.5A CN202111541047A CN114267811A CN 114267811 A CN114267811 A CN 114267811A CN 202111541047 A CN202111541047 A CN 202111541047A CN 114267811 A CN114267811 A CN 114267811A
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Abstract
The application discloses display panel and display device, display panel includes: a substrate; a light emitting layer on the substrate, the light emitting layer including a plurality of light emitting cells; the light correction layer is positioned on one side of the light-emitting layer, which is far away from the substrate, the light correction layer comprises a correction part layer, the correction part layer comprises a first correction part and a second correction part, and the second correction part is positioned on at least one side of the first correction part in the direction perpendicular to the thickness of the display panel; wherein an orthographic projection of the first correction device on the substrate and an orthographic projection of the light emitting unit on the substrate at least partially overlap, and a refractive index of the first correction device is different from a refractive index of the second correction device. The light emitting route can be changed, the light emitting efficiency of the display panel is improved, and the display effect and the service life of the display panel are improved.
Description
Technical Field
The application relates to the field of display, in particular to a display panel and a display device.
Background
The Organic Light Emitting Diode (OLED) display panel has the advantages of high color gamut, flexibility, fast response speed, and the like, and the market share thereof increases year by year. The display effect of the OLED panel is also more and more required by users. However, the OLED display panel includes a light emitting device and a plurality of film layers disposed on the light emitting side of the light emitting device, and each film layer has different absorptivities and refractive indexes, which affect the light emitting efficiency of the light emitting device.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, and aims to improve the light emitting efficiency of the display panel.
An embodiment of a first aspect of the present application provides a display panel, including: a substrate; a light emitting layer on the substrate, the light emitting layer including a plurality of light emitting cells; the light correction layer is positioned on one side of the light-emitting layer, which is far away from the substrate, and comprises a correction part layer, the correction part layer comprises a first correction part and a second correction part, and the second correction part is positioned on at least one side of the first correction part in the direction perpendicular to the thickness direction of the display panel; wherein, the orthographic projection of the first correcting part on the substrate and the orthographic projection of the light-emitting unit on the substrate are at least partially overlapped, and the refractive index of the first correcting part is different from that of the second correcting part.
According to an embodiment of the first aspect of the present application, the second correction portion is provided around the first correction portion.
According to any one of the embodiments of the first aspect of the present application, an orthographic projection of the first correction portion on the substrate is located within an orthographic projection of the light emitting unit on the substrate.
According to any one of the embodiments of the first aspect of the present application, an orthogonal projection center of the first correction portion on the substrate and an orthogonal projection center of the light emitting unit on the substrate are disposed to overlap.
According to any one of the embodiments of the first aspect of the present application, the orthographic projection edge of the first correction portion on the substrate and the orthographic projection edge of the light emitting unit on the substrate are equally spaced.
According to any one of the embodiments of the first aspect of the present application, the orthographic projection edge of the second correction device on the substrate is equidistant from the orthographic projection edge of the first correction device on the substrate.
According to one embodiment of the first aspect of the present application, the number of the second correction devices is plural, the plural second correction devices are mutually sleeved, and the refractive indexes of the plural second correction devices are different.
According to any one of the embodiments of the first aspect of the present application, the refractive index of the first correction device is larger than the refractive index of the second correction device, and the refractive indices of the plurality of second correction devices tend to decrease in the direction from the first correction device to the second correction device.
According to any one of the embodiments of the first aspect of the present application, the refractive index of the first correction device is smaller than the refractive index of the second correction device, and the refractive indices of the plurality of second correction devices tend to increase in the direction from the first correction device to the second correction device.
According to any one of the embodiments of the first aspect of the present application, the plurality of second correction portions are disposed at equal intervals on the orthographic projection edge of the substrate.
According to any one of the previous embodiments of the first aspect of the present application, the light emitting unit includes a first light emitting unit and a second light emitting unit adjacently disposed along a first direction, the first light emitting unit is configured to emit blue light, and the second light emitting unit is configured to emit green light or red light;
along the first direction, a first distance is formed between the first correction portion and the second correction portion corresponding to the first light-emitting unit, a second distance is formed between the first correction portion and the second correction portion corresponding to the second light-emitting unit, and the first distance is larger than the second distance.
According to any one of the embodiments of the first aspect of the present application, the number of the second correction devices corresponding to the first light emitting unit is larger than the number of the second correction devices corresponding to the second light emitting unit.
In accordance with any of the preceding embodiments of the first aspect of the present application, the light-correcting layer further comprises: the first auxiliary layer is positioned on the side, away from the light-emitting layer, of the correction part layer, and the refractive index of the first auxiliary layer is larger than or equal to that of the larger one of the first correction part and the second correction part.
According to any of the embodiments of the first aspect of the present application, the light-correcting layer further comprises a second auxiliary layer located on a side of the first auxiliary layer facing away from the correcting portion layer, and the refractive index of the second auxiliary layer is smaller than the refractive index of the first auxiliary layer.
According to any one of the embodiments of the first aspect of the present application, the refractive index of the first correction unit is larger than the refractive index of the second correction unit, and the light-ray correction layer further includes a third auxiliary layer provided between the light-emitting layer and the correction unit layer, the refractive index of the third auxiliary layer being larger than or equal to the refractive index of the first correction unit.
According to any of the embodiments of the first aspect of the present application, the light-correcting layer further includes a fourth auxiliary layer disposed between the third auxiliary layer and the light-emitting layer, and the refractive index of the fourth auxiliary layer is smaller than the refractive index of the third auxiliary layer.
According to any of the embodiments of the first aspect of the present application, the refractive index of the first correction unit is smaller than the refractive index of the second correction unit, and the light-ray correction layer further includes a fifth auxiliary layer disposed between the light-emitting layer and the correction unit layer, the refractive index of the fifth auxiliary layer being smaller than or equal to the refractive index of the first correction unit.
According to any one of the preceding embodiments of the first aspect of the present application, the number of layers of the fifth auxiliary layer is two or more.
According to any preceding embodiment of the first aspect of the present application, further comprising: the packaging layer is arranged on one side, away from the substrate, of the light emitting unit and comprises a first inorganic layer, a first organic layer and a second inorganic layer which are sequentially stacked along the direction away from the light emitting layer, and the correcting part layer is multiplexed into the first organic layer.
According to any one of the preceding embodiments of the first aspect of the present application, the refractive index of the second inorganic layer is greater than or equal to the refractive index of the first organic layer.
Embodiments of the second aspect of the present application provide a display device, which includes the display panel of any one of the above embodiments.
In the display panel of the embodiment of the application, the display panel comprises a substrate, a light emitting unit and a light correction layer, wherein the light emitting unit and the light correction layer are positioned on the substrate. The light correction layer includes a first correction portion and a second correction portion, and an orthographic projection of the first correction portion on the substrate and an orthographic projection of the light emitting unit on the substrate at least partially overlap, so that light emitted by the light emitting unit can pass through the first correction portion. At least one side of the first correcting part is provided with a second correcting part, the refractive indexes of the first correcting part and the second correcting part are different, a vertical reflecting surface consistent with the emitting direction can be formed between the first correcting part and the second correcting part, and the reflecting surface can reflect the emergent rays of the light emitting unit, so that more emergent rays are emitted from the position right above the light emitting unit, the light emitting route can be changed, the light emitting efficiency of the display panel is improved, and the display effect and the service life of the display panel are improved.
Drawings
Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 illustrates a schematic top view of a display panel according to an embodiment of the present application;
FIG. 2 shows an enlarged partial view of an exemplary region Q of FIG. 1;
FIG. 3 shows a cross-sectional view at A-A of FIG. 2 in one embodiment;
FIG. 4 shows a top view of FIG. 3;
FIG. 5 shows a cross-sectional view at B-B of FIG. 2 in one embodiment;
FIG. 6 shows a cross-sectional view at A-A in FIG. 2 in yet another embodiment;
FIG. 7 shows a cross-sectional view at A-A in FIG. 2 in yet another embodiment;
FIG. 8 shows a cross-sectional view at A-A in FIG. 2 in yet another embodiment;
FIG. 9 shows a cross-sectional view at A-A in FIG. 2 in yet another embodiment;
fig. 10 shows a cross-sectional view at a-a in fig. 2 in yet another embodiment.
100. A display panel; 110. a sub-pixel; 111. a red sub-pixel; 112. a green sub-pixel; 113. a blue sub-pixel;
10. a substrate;
20. a light emitting unit; 21. a first light emitting unit; 22. a second light emitting unit;
30. a correction section layer; 31. a first correction unit; 32. a second correction unit; 33. a reflective surface;
40. a first auxiliary layer;
50. a second auxiliary layer;
60. a third auxiliary layer;
70. a fourth auxiliary layer;
80. a fifth auxiliary layer;
90. a packaging layer; 91. a first inorganic layer; 92. a first organic layer; 93. a second inorganic layer;
AA. A display area; NA, non-display area; x, a first direction; z, thickness direction.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Embodiments of the present disclosure provide a display panel, which may be an Organic Light Emitting Diode (OLED) display panel.
Fig. 1 illustrates a schematic top view of a display panel according to an embodiment of the present application, and fig. 2 illustrates an exemplary enlarged view of a portion of a region Q in fig. 1.
As shown in fig. 1 and 2, according to the display panel 100 of the embodiment of the present application, the display panel 100 includes a display area AA and a non-display area NA. In other embodiments, the display panel 100 may be a full-screen display panel, and the display panel 100 includes the display area AA. The display panel 100 includes a plurality of sub-pixels 110, and the plurality of sub-pixels 110 are, for example, a red sub-pixel 111, a blue sub-pixel 113, and a green sub-pixel 112. In other embodiments, the plurality of sub-pixels 110 further includes, for example, a yellow sub-pixel.
Referring also to fig. 1-3, fig. 3 shows a partial cross-sectional view at a-a of fig. 2.
As shown in fig. 1 to 3, according to the display panel 100 of the embodiment of the present application, the display panel 100 includes: a substrate 10; a light emitting layer on the substrate 10, the light emitting layer including a plurality of light emitting cells 20; a light correction layer on a side of the light emitting layer facing away from the substrate 10, the light correction layer including a correction portion layer 30, the correction portion layer 30 including a first correction portion 31 and a second correction portion 32, the second correction portion 32 being located on at least one side of the first correction portion 31 in a direction perpendicular to a thickness direction of the display panel 100; wherein the orthographic projection of the first correction unit 31 on the substrate 10 and the orthographic projection of the light emitting unit 20 on the substrate 10 at least partially overlap, and the refractive index of the first correction unit 31 is different from the refractive index of the second correction unit 32.
The direction perpendicular to the thickness direction of the display panel 100 is, for example, an arbitrary direction on the plane of the display panel 100.
In the display panel 100 of the embodiment of the present application, the display panel 100 includes a substrate 10, a light emitting unit 20 on the substrate 10, and a light ray correction layer. The light correction layer includes a correction portion layer 30, the correction portion layer 30 includes a first correction portion 31 and a second correction portion 32, and an orthographic projection of the first correction portion 31 on the substrate 10 and an orthographic projection of the light emitting unit 20 on the substrate 10 at least partially overlap, so that light emitted by the light emitting unit 20 can pass through the first correction portion 31. The second correction unit 32 is disposed on at least one side of the first correction unit 31, and the refractive indexes of the first correction unit 31 and the second correction unit 32 are different, a vertical reflection surface 33 in accordance with the emitting direction can be formed between the first correction unit 31 and the second correction unit 32, and the reflection surface 33 can reflect the emitted light of the light emitting unit 20, so that more emitted light is emitted from the light emitting unit 20 directly above, the light emitting path can be changed, the light emitting efficiency of the display panel 100 is improved, the display effect of the display panel 100 is improved, and the service life of the display panel 100 is prolonged.
The substrate 10 may be made of a light-transmitting material such as glass or Polyimide (PI). The sub-pixel 110 includes the light emitting unit 20, and a first electrode layer and a second electrode layer on both sides of the light emitting unit 20.
In some alternative embodiments, the light emitting unit 20 may further include at least one of a hole injection layer, a hole transport layer, an electron injection layer, or an electron transport layer according to design requirements.
The first electrode layer may be a light-transmitting electrode, and the first electrode layer may include an Indium Tin Oxide (ITO) layer or an Indium zinc Oxide (ITO) layer. Alternatively, the first electrode layer may also be a reflective electrode layer, including a first light-transmitting conductive layer, a reflective layer on the first light-transmitting conductive layer, and a second light-transmitting conductive layer on the reflective layer. The first and second transparent conductive layers may be ITO, indium zinc oxide, etc., and the reflective layer may be a metal layer, such as made of silver. The second electrode layer may include a magnesium silver alloy layer.
Illustratively, an array substrate layer may be further disposed between the substrate 10 and the light emitting unit 20, and the array substrate layer includes, for example, a driving device including, for example, a pixel driving circuit and the like.
Referring to fig. 3 and 4 together, fig. 4 is a top view of fig. 3.
In some alternative embodiments, as shown in fig. 3 and 4, the second correction device 32 is disposed around the first correction device 31.
In these alternative embodiments, the second correction unit 32 is annular, and the first correction unit 31 is located in the annular second correction unit 32, so that the outgoing light beams at different positions on the periphery of the first correction unit 31 can be reflected from the reflection surface 33 between the first correction unit 31 and the second correction unit 32, thereby improving the correction effect of the correction unit layer 30 on the light beams emitted by the light emitting units 20, further improving the light extraction efficiency of the display panel 100, and improving the display effect and the service life of the display panel 100.
In some alternative embodiments, the orthographic projection of the first correction portion 31 on the substrate 10 is located within the orthographic projection of the light emitting unit 20 on the substrate 10. That is, the orthographic projection area of the first correction unit 31 on the substrate 10 is smaller than or equal to the orthographic projection area of the light-emitting unit 20 on the substrate 10, the first correction unit 31 is positioned right above the light-emitting unit 20, and the reflection surfaces 33 at different positions in the circumferential direction of the first correction unit 31 can receive the outgoing light from the light-emitting unit 20 and reflect the outgoing light, so that the correction effect of the correction unit layer 30 on the light emitted by the light-emitting unit 20 can be improved, the light-emitting efficiency of the display panel 100 can be improved, and the display effect and the service life of the display panel 100 can be improved.
In some alternative embodiments, the orthographic projection center of the first correction portion 31 on the substrate 10 and the orthographic projection center of the light emitting unit 20 on the substrate 10 are disposed to overlap. The light adjusting effect of the correction layer 30 on the outgoing light of the light emitting unit 20 at different positions in the direction perpendicular to the thickness direction Z is consistent, the difference in the outgoing light amount in different directions is reduced, and the uniformity of the display effect of the display panel 100 is improved.
In some alternative embodiments, the orthographic projection edge of the first correction portion 31 on the substrate 10 and the orthographic projection edge of the light emitting unit 20 on the substrate 10 are equally spaced.
In these alternative embodiments, when the orthographic projection edge of the first correction portion 31 on the substrate 10 and the orthographic projection edge of the light emitting unit 20 on the substrate 10 are disposed at equal intervals, the orthographic projection shape of the first correction portion 31 on the substrate 10 and the orthographic projection shape of the light emitting unit 20 on the substrate 10 are similar, and the orthographic projection center of the first correction portion 31 on the substrate 10 and the orthographic projection center of the light emitting unit 20 on the substrate 10 are disposed to overlap. The light adjusting effect of the correcting portion layer 30 on the outgoing light of the light emitting unit 20 at different positions in the direction perpendicular to the thickness direction Z is more consistent, the difference of the outgoing light in different directions is reduced, and the uniformity of the display effect of the display panel 100 is improved.
In some alternative embodiments, the orthographic projection edge of the second correction device 32 on the substrate 10 is equally spaced from the orthographic projection edge of the first correction device 31 on the substrate 10.
In these alternative embodiments, the light emitted from the first correction unit 31 passes through the second correction unit 32. Since the orthographic projection edge of the second correction unit 32 on the substrate 10 is equidistant from the orthographic projection edge of the first correction unit 31 on the substrate 10, that is, the sizes of the second correction units 32 on different sides of the first correction unit 31 are the same, the adjustment effect of the second correction units 32 on the emergent light of the first correction unit 31 tends to be the same, the difference of the emergent light in different directions can be reduced, and the uniformity of the display effect of the display panel 100 can be improved.
There are various ways of setting the number of the second correction units 32, and for example, one second correction unit 32 is provided around the first correction unit 31.
In other alternative embodiments, there are a plurality of second correction devices 32, the plurality of second correction devices 32 are mutually sleeved, and the refractive indexes of the plurality of second correction devices 32 are different. By providing a plurality of second correction units 32 having different refractive indices, the reflection surfaces 33 can be formed between different second correction units 32, and these reflection surfaces 33 can reflect the light emitted from the light-emitting unit 20, thereby further improving the effect of the correction unit layer 30 in adjusting the light emitted from the light-emitting unit 20.
When there are a plurality of second correction units 32, there are a plurality of setting manners of the refractive index of the plurality of second correction units 32.
In some alternative embodiments, the refractive index of the first correction device 31 is larger than the refractive index of the second correction device 32, and the refractive indices of the plurality of second correction devices 32 have a tendency to decrease in the direction from the first correction device 31 to the second correction device 32.
In these alternative embodiments, when the refractive indices of the plurality of second correction devices 32 have a tendency to decrease in the direction from the first correction device 31 to the second correction device 32, the total reflection angles of the reflection surfaces 33 of the first correction device 31 and the second correction device 32 and the reflection surfaces 33 of the different second correction devices 32 become smaller. In addition, along the direction from the first correction unit 31 to the second correction unit 32, the included angle between the outgoing light of the light-emitting unit 20 and the contact surface becomes smaller, so that the reflection surface 33 can reflect more light, the adjustment effect of the correction unit layer 30 on the outgoing light can be further improved, and the light output amount and the display effect of the display panel 100 can be further improved.
In other alternative embodiments, the refractive index of the first correction device 31 is smaller than the refractive index of the second correction device 32, and the refractive indices of the plurality of second correction devices 32 have a tendency to increase along the direction from the first correction device 31 to the second correction device 32.
In these alternative embodiments, when the outgoing light of the light emitting unit 20 enters the second correcting portion 32, the angle between the outgoing light of the light emitting unit 20 and the reflecting surface 33 is smaller and smaller along the direction from the first correcting portion 31 to the second correcting portion 32. The second correction unit 32 can correct the light emitting direction of the light emitting unit 20, and the larger the refractive index is, the larger the correction angle is, the more light can be emitted from the right above the light emitting unit 20.
In some alternative embodiments, the plurality of second correction portions 32 are disposed at equal intervals on the orthographic projection edge of the substrate 10. The adjustment effect of the second correction unit 32 on the outgoing light beams at different positions tends to be consistent, so that the difference of the outgoing light beams in different directions can be reduced, and the uniformity of the display effect of the display panel 100 can be improved.
Alternatively, when there are a plurality of second correction devices 32, the thickness dimensions of the plurality of second correction devices 32 may be the same or different. For example, as shown in fig. 3 and 4, the number of the second correction devices 32 is three, and two of the three second correction devices 32 on the side closer to the first correction device 31 have the same thickness, and the outermost second correction device 32 is different from the other second correction devices 32 in thickness.
Referring to fig. 5, fig. 5 is a cross-sectional view taken along line B-B of fig. 2.
In some alternative embodiments, as shown in fig. 5, the light emitting unit 20 includes a first light emitting unit 21 and a second light emitting unit 22 adjacently disposed along the first direction X, the first light emitting unit 21 is configured to emit blue light, and the second light emitting unit 22 is configured to emit green or red light. Alternatively, the first light emitting unit 21 is used to form the blue sub-pixel 113, and the second light emitting unit 22 is used to form the green sub-pixel 112 or the red sub-pixel 111.
Along the first direction X, the first correction unit 31 and the second correction unit 32 corresponding to the first light-emitting unit 21 have a first distance d therebetween1The first correction unit 31 and the second correction unit 32 corresponding to the second light emitting unit 22 have a second distance d therebetween2First distance d1Is greater than the second spacing d2。
The first correction unit 31 and the second correction unit 32 corresponding to the first light-emitting unit 21 are: a first correction unit 31 positioned on the first light-emitting unit 21, and a second correction unit 32 positioned on the first correction unit 31 side. The first correction unit 31 and the second correction unit 32 corresponding to the second light emitting unit 22 are: a first correction unit 31 positioned on the second light emitting unit 22, and a second correction unit 32 positioned on the first correction unit 31 side.
In these alternative embodiments, when the distance between the second correction device 32 and the first correction device 31 is larger, the second correction device 32 can better correct the outgoing light of the corresponding light-emitting unit 20. The life span and luminous efficiency of the first light emitting unit 21 for emitting blue light are lower than those of the second light emitting unit 22 for emitting green or red light, the first interval d1Is greater than the second spacing d2The light emitting effect of the display panel 100 is more uniform.
When there is one second correction unit 32, the first pitch d1The distance between the first correction unit 31 and the corresponding second correction unit 32 from the edge of the first correction unit 31 may be set as the second distance d2The distance between the first correction device 31 and the edge of the corresponding second correction device 32 that is away from the first correction device 31 may be set.
When the second correction unit 32 is plural, the first pitch d1May be the first correction unit 31 and a second correcting part 32 farthest from the first correcting part 31, and a second pitch d2The distance between the first correction unit 31 and the second correction unit 32 farthest from the first correction unit 31 may be set.
In some alternative embodiments, the first spacing d may be achieved by adjusting the size or number of the second correction devices 321Is greater than the second spacing d2。
For example, the extension of the second correction device 32 corresponding to the first light emitting unit 21 in the first direction X is larger than the extension of the second correction device 32 corresponding to the second light emitting unit 22 in the first direction X, so that the first pitch d1Is greater than the second spacing d2。
In other alternative embodiments, the number of the second correction devices 32 corresponding to the first light emitting unit 21 is greater than the number of the second correction devices 32 corresponding to the second light emitting unit 22.
In these alternative embodiments, the second correction device 32 corresponding to the first light emitting unit 21 is a second correction device 32 disposed outside the corresponding first correction device 31, and the second correction device 32 corresponding to the second light emitting unit 22 is a second correction device 32 disposed outside the corresponding first correction device 31. The number of the second correction devices 32 corresponding to the first light-emitting units 21 is large, so that the light-emitting efficiency adjustment effect of the correction device layer 30 on the second light-emitting units 22 can be improved, the light-emitting efficiencies of different light-emitting units 20 tend to be consistent, and the uniformity of the display effect of the display panel 100 can be improved.
Referring to FIG. 6, FIG. 6 is a cross-sectional view taken along line A-A of FIG. 2 in accordance with yet another embodiment.
In other alternative embodiments, as shown in fig. 6, the light-correcting layer further includes a first auxiliary layer 40, the first auxiliary layer 40 is located on the side of the correcting section layer 30 facing away from the light-emitting layer, and the refractive index of the first auxiliary layer 40 is greater than or equal to the refractive index of the larger one of the first correcting section 31 and the second correcting section 32.
In these alternative embodiments, the refractive index of the first auxiliary layer 40 is greater than or equal to the refractive index of the higher refractive index of the first correction unit 31 and the second correction unit 32, when the outgoing light enters the first auxiliary layer 40 from the first correction unit 31 or the second correction unit 32, the outgoing light enters the layer structure with the higher refractive index from the layer structure material with the lower refractive index, and the outgoing light is refracted along the normal line extending along the thickness direction Z, so that more light is emitted from the position directly above the light emitting unit 20, which can further improve the light emitting efficiency of the light emitting unit 20 and increase the light output amount of the display panel 100.
Referring to fig. 7, fig. 7 is a cross-sectional view taken along line a-a of fig. 2 in a further embodiment.
In still other alternative embodiments, as shown in fig. 7, the light-correcting layer further includes a second auxiliary layer 50 on the side of the first auxiliary layer 40 facing away from the correcting portion layer 30, the refractive index of the second auxiliary layer 50 being less than the refractive index of the first auxiliary layer 40.
In these optional embodiments, when the emergent light of the light emitting unit 20 enters the second auxiliary layer 50 through the first auxiliary layer 40, the emergent light enters the layer structure with a smaller refractive index through the layer structure with a larger refractive index, and the emergent light is deflected away from the normal line extending along the thickness direction Z, so that the emergent angle of the light emitting unit 20 can be increased, and the display effect of the display panel 100 can be improved.
Referring to fig. 8, fig. 8 is a cross-sectional view taken along line a-a of fig. 2 in accordance with yet another embodiment.
In still other alternative embodiments, as shown in fig. 8, the refractive index of the first correction portion 31 is greater than the refractive index of the second correction portion 32, the light-correcting layer further includes a third auxiliary layer 60 disposed between the light-emitting layer and the correction portion layer 30, and the refractive index of the third auxiliary layer 60 is greater than or equal to the refractive index of the first correction portion 31.
In these alternative embodiments, the refractive index of the third auxiliary layer 60 is greater than or equal to the refractive index of the first correction portion 31, and the refractive index of the first correction portion 31 is greater than the refractive index of the second correction portion 32, so the refractive index of the third auxiliary layer 60 is greater than the refractive index of the second correction portion 32. When the outgoing light enters the second correction portion 32 through the third auxiliary layer 60, the outgoing light enters the layer structure with the smaller refractive index from the layer structure material with the larger refractive index, and the outgoing light is refracted away from the normal line extending along the thickness direction Z at the contact interface between the second correction portion 32 and the third auxiliary layer 60, so that the outgoing light is more easily totally reflected at the vertical reflection surface 33 at the edge of the second correction portion 32, and the light extraction efficiency of the light emitting unit 20 can be further improved, and the light extraction amount of the display panel 100 is improved.
Alternatively, when the refractive index of the first correction device 31 is larger than the refractive index of the second correction device 32, and the plurality of second correction devices 32 are provided, the refractive indices of the plurality of second correction devices 32 tend to decrease along the direction from the first correction device 31 to the second correction device 32.
In some alternative embodiments, with reference to fig. 8, the light-correcting layer further includes a fourth auxiliary layer 70 disposed between the third auxiliary layer 60 and the light-emitting layer, and the refractive index of the fourth auxiliary layer 70 is smaller than the refractive index of the third auxiliary layer 60.
In these alternative embodiments, when the outgoing light of the light emitting unit 20 enters the third auxiliary layer 60 from the fourth auxiliary layer 70, the outgoing light enters the layer structure with a larger refractive index from the layer structure material with a smaller refractive index, and the outgoing light is refracted along the normal line extending along the thickness direction Z, so that more light is emitted from the right above the light emitting unit 20, which can further improve the light extraction efficiency of the light emitting unit 20 and improve the light extraction amount of the display panel 100.
Optionally, referring to fig. 8, the light-correcting layer further includes a first auxiliary layer 40, the first auxiliary layer 40 is located on a side of the correcting portion layer 30 away from the light-emitting layer, and a refractive index of the first auxiliary layer 40 is greater than or equal to a refractive index of one of the first correcting portion 31 and the second correcting portion 32 with a larger refractive index, so as to further improve the light-emitting efficiency of the light-emitting unit 20 and improve the light-emitting amount of the display panel 100.
Optionally, referring to fig. 8, the light-correcting layer further includes a second auxiliary layer 50 located on a side of the first auxiliary layer 40 away from the correcting portion layer 30, and a refractive index of the second auxiliary layer 50 is smaller than a refractive index of the first auxiliary layer 40, so as to increase an exit angle of the light-emitting unit 20 and improve a display effect of the display panel 100.
Referring to FIG. 9, FIG. 9 is a cross-sectional view taken along line A-A of FIG. 2 in accordance with yet another embodiment.
In some alternative embodiments, as shown in fig. 9, the refractive index of the first correction portion 31 is smaller than that of the second correction portion 32, and the light correction layer further includes a fifth auxiliary layer 80 disposed between the light emitting layer and the correction portion layer 30, wherein the refractive index of the fifth auxiliary layer 80 is smaller than or equal to that of the first correction portion 31. Alternatively, the number of the fifth auxiliary layers 80 may be two or more.
In these alternative embodiments, the refractive index of the fifth auxiliary layer 80 is smaller than or equal to the refractive index of the first correction portion 31, and the refractive index of the first correction portion 31 is smaller than the refractive index of the second correction portion 32, that is, the refractive index of the fifth auxiliary layer 80 is smaller than the refractive index of the second correction portion 32. When the emergent light of the light emitting unit 20 enters the second correcting portion 32 from the fifth auxiliary layer 80, the emergent light enters the layer structure with a larger refractive index from the layer structure material with a smaller refractive index, and the emergent light is refracted along the normal line extending along the thickness direction Z, so that more light is emitted from the right above the light emitting unit 20, the light emitting efficiency of the light emitting unit 20 can be further improved, and the light emitting amount of the display panel 100 is improved.
Alternatively, when the refractive index of the first correction device 31 is smaller than the refractive index of the second correction device 32, the number of the second correction devices 32 is plural, and the plurality of the second correction devices 32 are disposed one on another, the refractive indices of the plurality of the second correction devices 32 tend to increase in the direction from the first correction device 31 to the second correction device 32.
Referring to fig. 10, fig. 10 is a cross-sectional view taken along line a-a of fig. 2 according to yet another embodiment.
Optionally, referring to fig. 9, the light-correcting layer further includes a first auxiliary layer 40, the first auxiliary layer 40 is located on a side of the correcting portion layer 30 away from the light-emitting layer, and a refractive index of the first auxiliary layer 40 is greater than or equal to a refractive index of one of the first correcting portion 31 and the second correcting portion 32 with a larger refractive index, so as to further improve the light-emitting efficiency of the light-emitting unit 20 and improve the light-emitting amount of the display panel 100.
Optionally, referring to fig. 9, the light-correcting layer further includes a second auxiliary layer 50 located on a side of the first auxiliary layer 40 away from the correcting portion layer 30, and a refractive index of the second auxiliary layer 50 is smaller than a refractive index of the first auxiliary layer 40, so as to increase an exit angle of the light-emitting unit 20 and improve a display effect of the display panel 100.
In some alternative embodiments, as shown in fig. 10, the display panel 100 further includes an encapsulation layer 90, the encapsulation layer 90 is disposed on a side of the light emitting layer facing away from the substrate 10, the encapsulation layer 90 includes a first inorganic layer 91, a first organic layer 92 and a second inorganic layer 93 sequentially stacked in a direction away from the light emitting unit 20, and the correction portion layer 30 is reused as the first organic layer 92.
In these alternative embodiments, the light-correcting layer is multiplexed into the first organic layer 92, on one hand, the number of layer structures of the display panel 100 is not increased, and on the other hand, the first organic layer 92 is formed by inkjet printing technology, so that the first correcting portion 31 and the second correcting portion 32 with different refractive indexes are easily formed, and the difficulty in manufacturing the display panel 100 can be reduced.
In some alternative embodiments, the refractive index of the second inorganic layer 93 is greater than or equal to the refractive index of the first organic layer 92. When the emergent light of the light emitting unit 20 is incident to the second inorganic layer 93 through the first organic layer 92, the emergent light is incident to the layer structure with a larger refractive index through the layer structure with a smaller refractive index, and the emergent light is refracted along a normal line extending along the thickness direction Z, so that more light is emitted from the right above the light emitting unit 20, the light emitting efficiency of the light emitting unit 20 can be further improved, and the light emitting amount of the display panel 100 is improved.
The display panel 100 may further include a polarizer and a cover plate over the encapsulation layer 90, or the cover plate may be directly disposed over the encapsulation layer 90 without disposing the polarizer. In other alternative embodiments, touch electrodes may also be disposed over the encapsulation layer 90.
Optionally, in some optional embodiments, a light extraction layer and a light modulation layer, such as a lithium fluoride layer, are further disposed between the light emitting layer and the encapsulation layer 90 to improve the light extraction efficiency of the display panel 100.
The embodiment of the present application further provides a display device, which may include the display panel 100 of any of the above embodiments. Since the display device of the embodiment of the present application includes the display panel 100, the display device of the embodiment of the present application has the beneficial effects of the display panel 100, and details are not repeated herein.
The display device in the embodiment of the present application includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet computer, an electronic book, a television, a door lock, a smart phone, a console, and other devices having a display function.
In accordance with the embodiments described herein above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A display panel, comprising:
a substrate;
a light emitting layer on the substrate, the light emitting layer including a plurality of light emitting cells;
the light correction layer is positioned on one side of the light-emitting layer, which is far away from the substrate, and comprises a correction part layer, the correction part layer comprises a first correction part and a second correction part, and the second correction part is positioned on at least one side of the first correction part in the direction perpendicular to the thickness direction of the display panel;
wherein an orthographic projection of the first correction device on the substrate and an orthographic projection of the light emitting unit on the substrate at least partially overlap, and a refractive index of the first correction device is different from a refractive index of the second correction device.
2. The display panel according to claim 1, wherein the second correcting portion is provided around the first correcting portion;
preferably, an orthographic projection of the first correction device on the substrate is located within an orthographic projection of the light emitting unit on the substrate;
preferably, an orthogonal projection center of the first correction unit on the substrate and an orthogonal projection center of the light emitting unit on the substrate overlap each other.
3. The display panel according to claim 2, wherein the orthographic projection edges of the first correction portions on the substrate and the orthographic projection edges of the light emitting units on the substrate are arranged at equal intervals;
preferably, an orthographic projection edge of the second correction device on the substrate is equidistant from an orthographic projection edge of the first correction device on the substrate.
4. The display panel according to claim 2, wherein the number of the second correction portions is plural, the plural second correction portions are fitted to each other, and refractive indices of the plural second correction portions are different;
preferably, the refractive index of the first correction device is larger than the refractive index of the second correction device, and the refractive indices of the plurality of second correction devices tend to decrease in a direction from the first correction device to the second correction device,
or the refractive index of the first correction device is smaller than the refractive index of the second correction device, and the refractive indices of the plurality of second correction devices tend to increase in the direction from the first correction device to the second correction device;
preferably, the plurality of second correction units are provided at equal intervals on the orthographic projection edge on the substrate.
5. The display panel according to claim 2,
the light emitting unit comprises a first light emitting unit and a second light emitting unit which are adjacently arranged along a first direction, wherein the first light emitting unit is used for emitting blue light, and the second light emitting unit is used for emitting green light or red light;
along the first direction, a first distance is formed between the first correction device and the second correction device corresponding to the first light-emitting unit, a second distance is formed between the first correction device and the second correction device corresponding to the second light-emitting unit, and the first distance is larger than the second distance;
preferably, the number of the second correction devices corresponding to the first light emitting unit is larger than the number of the second correction devices corresponding to the second light emitting unit.
6. The display panel of claim 1, wherein the light-correcting layer further comprises: a first auxiliary layer located on a side of the correction section layer facing away from the light-emitting layer, the first auxiliary layer having a refractive index greater than or equal to a refractive index of one of the first correction section and the second correction section, which has a larger refractive index;
preferably, the light-correcting layer further includes a second auxiliary layer located on a side of the first auxiliary layer facing away from the correcting portion layer, and a refractive index of the second auxiliary layer is smaller than a refractive index of the first auxiliary layer.
7. The display panel according to claim 1, wherein the refractive index of the first correction portion is larger than the refractive index of the second correction portion, wherein the light correction layer further comprises a third auxiliary layer provided between the light-emitting layer and the correction portion layer, and wherein the refractive index of the third auxiliary layer is larger than or equal to the refractive index of the first correction portion;
preferably, the light-correcting layer further includes a fourth auxiliary layer disposed between the third auxiliary layer and the light-emitting layer, and a refractive index of the fourth auxiliary layer is smaller than a refractive index of the third auxiliary layer.
8. The display panel according to claim 1, wherein the refractive index of the first correction portion is smaller than the refractive index of the second correction portion, wherein the light correction layer further comprises a fifth auxiliary layer provided between the light-emitting layer and the correction portion layer, and wherein the refractive index of the fifth auxiliary layer is smaller than or equal to the refractive index of the first correction portion;
preferably, the number of layers of the fifth auxiliary layer is two or more.
9. The display panel according to claim 1, further comprising: the packaging layer is arranged on one side, away from the substrate, of the light emitting layer and comprises a first inorganic layer, a first organic layer and a second inorganic layer which are sequentially stacked along the direction away from the light emitting layer, and the correcting portion layer is reused as the first organic layer;
preferably, the refractive index of the second inorganic layer is greater than or equal to the refractive index of the first organic layer.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN202111541047.5A CN114267811A (en) | 2021-12-16 | 2021-12-16 | Display panel and display device |
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| CN202111541047.5A CN114267811A (en) | 2021-12-16 | 2021-12-16 | Display panel and display device |
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