CN110504288B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN110504288B CN110504288B CN201910794831.3A CN201910794831A CN110504288B CN 110504288 B CN110504288 B CN 110504288B CN 201910794831 A CN201910794831 A CN 201910794831A CN 110504288 B CN110504288 B CN 110504288B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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Abstract
The invention discloses a display panel and a display device. The display panel includes: a light emitting device layer including a plurality of light emitting devices arranged in an array; the color filter layer is arranged on the light emitting side of the light emitting device layer and comprises a plurality of initial type filter structures and a plurality of adjusting type filter structures, each adjusting type filter structure comprises an adjusting type filter unit and a light blocking unit formed by surrounding the adjusting type filter unit, and the surface of the adjusting type filter unit, which is back to the light emitting device layer, sinks and is formed towards the direction of the light emitting device layer relative to the surface of the light blocking unit, which is back to the light emitting device layer. According to the display panel provided by the embodiment of the invention, the phenomenon of color cast under a large viewing angle can be relieved or eliminated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the development of display technology, the display panel manufacturing technology also tends to mature. The conventional Display panel mainly includes an Organic Light Emitting Diode (OLED) Display panel and a Liquid Crystal Display (LCD) panel. The OLED display panel has the advantages of self-luminescence, low power consumption, fast response speed, wide viewing angle, and the like, and is widely applied to the display field.
However, in the current display panel, the color effect of the picture is poor under a large viewing angle, and a color cast phenomenon is easy to occur, which seriously affects the display effect of the display panel under the large viewing angle.
Therefore, it is desirable to provide a display panel that effectively improves the color shift that easily occurs at a large viewing angle.
Disclosure of Invention
The invention provides a display panel and a display device, wherein the display panel can relieve or eliminate the phenomenon of color cast under a large viewing angle.
In a first aspect, an embodiment of the present invention provides a display panel, which includes:
a light emitting device layer including a plurality of light emitting devices arranged in an array;
the color filter layer is arranged on the light emitting side of the light emitting device layer and comprises a plurality of initial type filter structures and a plurality of adjusting type filter structures, each adjusting type filter structure comprises an adjusting type filter unit and a light blocking unit formed by surrounding the adjusting type filter unit, and the surface of the adjusting type filter unit, which is back to the light emitting device layer, sinks and is formed towards the direction of the light emitting device layer relative to the surface of the light blocking unit, which is back to the light emitting device layer.
According to an aspect of the embodiments of the present invention, a surface of the adjustment type filter unit facing the light emitting device layer is flush with a surface of the light blocking unit facing the light emitting device layer.
The thickness of the adjusting type light filtering unit is set to be smaller than that of the light blocking unit, the surface of the adjusting type light filtering unit facing the light emitting device layer is equal to the surface of the light blocking unit facing the light emitting device layer, the surface of the adjusting type light filtering unit facing away from the light emitting device layer is lower than the surface of the light blocking unit facing away from the light emitting device layer, and the higher light blocking unit can block light rays of corresponding colors emitted by the adjusting type light filtering unit under a large visual angle, so that the phenomenon of color cast of the large visual angle is relieved or eliminated.
According to an aspect of the embodiments of the present invention, the display panel further includes an encapsulation layer, the encapsulation layer being located between the color filter layer and the light emitting device layer, the encapsulation layer being used to seal the light emitting device layer;
the packaging layer is provided with a first surface and a second surface which are opposite, the first surface faces back to the light-emitting device layer, the packaging layer is provided with a plurality of concave parts, the concave parts are formed from the first surface to the second surface, and the adjusting type light filtering unit is at least partially positioned in the concave parts.
The adjustable light filtering unit sinks to a certain height to the groove of the packaging layer, so that the surface of the adjustable light filtering unit facing away from the packaging layer is lower than the surface of the light blocking unit facing away from the packaging layer, and the higher light blocking unit can block light rays with corresponding colors emitted by the adjustable light filtering unit under a large visual angle, thereby relieving or eliminating the phenomenon of large visual angle color cast.
According to an aspect of the embodiments of the present invention, the encapsulation layer includes at least a first inorganic layer, an organic layer, and a second inorganic layer, which are stacked, the first inorganic layer is located on a side of the organic layer facing away from the light emitting device layer, and the second inorganic layer is located on a side of the organic layer facing toward the light emitting device layer;
and a plurality of concave parts are formed on one side of the first inorganic layer, which faces away from the light-emitting device layer.
The depressed part can be formed on the first inorganic layer far away from the light emitting device layer in the packaging layer, so that the surface of the adjusting type light filtering unit facing away from the packaging layer is lower than the surface of the light blocking unit facing away from the packaging layer, and the higher light blocking unit can block light rays with corresponding colors emitted by the adjusting type light filtering unit under a large visual angle, thereby relieving or eliminating the phenomenon of color cast at the large visual angle.
According to an aspect of the embodiments of the present invention, the encapsulation layer includes at least a first inorganic layer, an organic layer, and a second inorganic layer, which are stacked, the first inorganic layer is located on a side of the organic layer facing away from the light emitting device layer, and the second inorganic layer is located on a side of the organic layer facing toward the light emitting device layer;
the adjusting type light filtering unit is at least partially positioned in the concave part, and the first inorganic layer of the corresponding area is positioned in the concave part.
The concave part is formed from the organic layer of the packaging layer, so that the sinking depth of the adjustable light filtering unit is more, and the higher light blocking unit can more effectively block the light rays with the corresponding color emitted under the large viewing angle, thereby further relieving or eliminating the phenomenon of color cast of the large viewing angle.
According to an aspect of the embodiments of the present invention, the light blocking unit in the adjustment type filter structure has a protrusion, and the protrusion is located on a side of the light blocking unit facing away from the light emitting device layer and close to the adjustment type filter unit.
The light blocking units around the adjusting type light filtering units in the adjusting type light filtering structure are provided with bulges, and the bulges of the light blocking units can block light rays with corresponding colors emergent under a large visual angle, so that the phenomenon of color cast of the large visual angle is relieved or eliminated.
According to an aspect of the embodiment of the present invention, the protrusion is a continuous structure surrounding the adjustment type filter unit, or the protrusion is a discontinuous structure surrounding the adjustment type filter unit.
The light output quantity of the light rays with the corresponding colors under a large visual angle is controlled by utilizing the bulges with the non-continuous structures, and the phenomenon of color cast of the large visual angle is further relieved or eliminated.
According to an aspect of the embodiment of the present invention, a surface of a side of the adjustment type filter unit facing away from the light emitting device layer is a surface convex toward a direction facing away from the light emitting device layer.
The surface of one side of the adjusting type filtering unit back to the packaging layer in the adjusting type filtering structure is set to be a convex surface, so that the adjusting type filtering unit forms a light condensing structure, and when light is emitted outwards from the convex surface at a large visual angle, the light deviates from an original path and becomes gathered in a direction perpendicular to the display panel, so that the light emitting quantity of the color light at the large visual angle can be reduced, and the phenomenon of color deviation at the large visual angle is further relieved or eliminated.
According to an aspect of an embodiment of the invention, scattering particles are distributed in the initial-type filtering unit in at least a part of the initial filtering structure.
For example, for the phenomenon that a display screen is bluish under a large viewing angle, the red filter unit and the green filter unit are initial filter units, and scattering particles are arranged in the red filter unit and/or the green filter unit in the initial filter structure, so that the light emitting area of red light and/or green light can be increased, the light emitting amount of the red light and/or green light under the large viewing angle is increased, and the phenomenon that the large viewing angle is bluish is alleviated.
In a second aspect, an embodiment of the present invention provides a display device, which includes the display panel according to any one of the first aspect.
According to the display panel provided by the embodiment of the invention, the display panel comprises the light-emitting device layer and the color filter layer, and the surface of the adjusting type filter unit in the adjusting type filter structure, which faces away from the light-emitting device layer, is subjected to sinking forming relative to the direction of the surface of the light blocking unit in the adjusting type filter structure, which faces away from the light-emitting device layer, towards the light-emitting device layer. Under the large visual angle, the light of the corresponding colour of the outgoing of adjustment type light filtering unit in the adjustment type light filtering structure can be blockked by higher light blocking unit around this adjustment type light filtering unit for the light of the corresponding colour of part can't go out from display panel outgoing, thereby can reduce the light yield of the light of the corresponding colour under the large visual angle, reduce the proportion of the light of the corresponding colour under the large visual angle promptly, reach and alleviate or eliminate the phenomenon of large visual angle colour cast.
Drawings
Other features, objects and advantages of the invention 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 cross-sectional structure of a display panel according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the path of a blue light ray at a large viewing angle according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view illustrating a display panel according to a second embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure diagram of a display panel according to a third embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a display panel according to a fourth embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a top view structure of a partial region of the display panel provided in accordance with FIG. 5;
fig. 7 is a schematic cross-sectional view illustrating a display panel according to a fifth embodiment of the present invention.
Description of reference numerals:
100-a display panel;
10-an array substrate;
20-a light emitting device layer; 21-a red light emitting device; 22-green light emitting device; 23-a blue light emitting device; 24-a pixel defining layer;
30-an encapsulation layer; 31 — a first inorganic layer; 32-organic layer; 33-a second inorganic layer;
40-a color filter layer; 401-modulated filtering structure; 41-light blocking unit; 411-protrusions; 4110-bump units; 421-red filter unit; 422-green filter unit; 423-blue light filtering unit;
l-emergent ray; l1-original path; l2 — actual path.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention 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 invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention 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 invention by illustrating examples of the present invention.
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.
For the current OLED display panel, in the practical application process, the brightness of light rays with different colors has different degrees of attenuation along with the increase of the viewing angle, so that the color shift phenomenon occurs in a display picture emitting light normally under a normal viewing angle under a large viewing angle. For example, the luminance of the red light and the green light attenuates faster as the viewing angle increases, and the luminance of the blue light attenuates slower as the viewing angle increases, so that the light output amount of the blue light is larger under a large viewing angle of the display screen, and the proportion of the blue light is larger, thereby causing the display screen to be bluish under the large viewing angle. Or, the OLED light emitting device itself may have a reddish, greenish or purplish display screen at a large viewing angle due to the material, microcavity effect or other reasons.
The invention provides a display panel and a display device, aiming at the phenomenon that a display picture has color cast under a large visual angle. Features and exemplary embodiments of various aspects of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
For example, the display panels produced on the production line may be periodically detected to determine whether there is a color shift phenomenon at a large viewing angle in the produced display panels and which color shift exists, and then the next batch of display panels may be produced according to the structure of the display panels provided by the embodiment of the present invention.
Features and exemplary embodiments of various aspects of the present invention are described below using an example in which a display panel is blue at a large viewing angle, it being understood that the following embodiments are equally applicable to cases in which a display panel is red, green, and other color shifts at a large viewing angle.
Referring to fig. 1, fig. 3, fig. 4, fig. 5 or fig. 7, fig. 1, fig. 3, fig. 4, fig. 5 and fig. 7 are all examples of the display panel being bluish under a large viewing angle. The display panel 100 provided by the embodiment of the invention includes the light-emitting device layer 20 and the color filter layer 40. The light emitting device layer 20 includes a plurality of light emitting devices arranged in an array. The color filter layer 40 is disposed on the light emitting side of the light emitting device layer 20, the color filter layer includes a plurality of initial type filter structures and a plurality of adjustment type filter structures 401, each adjustment type filter structure 401 includes an adjustment type filter unit (i.e., a blue filter unit 423) and a light blocking unit 41 formed around the adjustment type filter unit, and a surface of the adjustment type filter unit in the adjustment type filter structure 401, which faces away from the light emitting device layer 20, is formed by sinking toward the light emitting device layer 20 relative to a surface of the light blocking unit 41, which faces away from the light emitting device layer 20.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a path of a blue light ray under a large viewing angle. For example, since the surface of the light blocking unit 41 facing away from the light emitting device layer 20 is higher than the surface of the blue filtering unit 423 facing away from the light emitting device layer 20, when a part of the blue light exits from the edge region of the blue filtering unit 423 to the outside of the display panel under a large viewing angle, the part of the blue light is blocked by the light blocking unit 41 higher around the blue filtering unit 423, so that the part of the blue light cannot exit from the display panel.
According to the display panel 100 provided by the embodiment of the present invention, the surface of the adjustment type filter unit facing away from the light emitting device layer 20 in the adjustment type filter structure 401 included in the color filter layer 40 is shaped by sinking toward the light emitting device layer 20 with respect to the surface of the light blocking unit facing away from the light emitting device layer 20. For example, for the phenomenon that the display screen is bluish under a large viewing angle, the blue filter unit 423 is an adjustment type filter unit, at least a part of the surface of the blue filter unit 423 facing away from the light-emitting device layer 20 is formed to sink relative to the surface of the light blocking unit 41 facing away from the light-emitting device layer 20 toward the light-emitting device layer 20, and when a part of the blue light exits from the edge area of the blue filter unit 423 to the outside of the display panel 100 under a large viewing angle, the part of the blue light is blocked by the light blocking unit 41 higher around the blue filter unit 423, so that the part of the blue light cannot exit from the display panel, and thus the light output amount of the blue light under a large viewing angle can be reduced, that is, the ratio of the blue light under a large viewing angle is reduced, and the phenomenon that the bluish under a large viewing angle is alleviated or eliminated is achieved. Similarly, for the phenomenon that the display screen is reddish or greenish under a large viewing angle, the surface of the red filter unit 421 facing away from the light-emitting device layer 20 is set to be shaped in a sinking manner towards the direction of the light-emitting device layer 20 relative to the surface of the light blocking unit 41 surrounding the red filter unit 20, facing away from the light-emitting device layer 20, or the surface of the green filter unit 422 facing away from the light-emitting device layer 20 is set to be shaped in a sinking manner towards the direction of the light-emitting device layer 20 relative to the surface of the light blocking unit 41 surrounding the green filter unit 422 facing away from the light-emitting device layer 20, so that the phenomenon that the large viewing angle is reddish or greenish can be relieved or eliminated. It should be understood that, for the case of other color shifts, it suffices to provide the corresponding filtering unit and light blocking unit in the above-described structure.
In some embodiments, referring to fig. 1, a display panel 100 according to an embodiment of the present invention further includes an array substrate 10, and a light emitting device layer is disposed on one side of the array substrate 10. The array substrate 10 includes a substrate and a thin film transistor (not shown) on the substrate, and the substrate may be a flexible substrate such as polyimide or a rigid substrate such as glass. The thin film transistor is used for driving the corresponding light emitting device to emit light. Illustratively, the thin film transistor includes an active layer, a gate insulating layer, a gate electrode, an interlayer insulating layer, a source electrode and a drain electrode, the source electrode and the drain electrode being electrically connected to the active layer through via holes located on the gate insulating layer and the interlayer insulating layer. The above description is given by way of example of a top gate structure array substrate, however, it will be understood by those skilled in the art that the solution of the present invention can also be applied to a bottom gate structure array substrate. Those skilled in the art can design the top gate structure or the bottom gate structure according to actual needs, and the position of the active layer is provided, which is not described herein again.
In some embodiments, the light emitting device in the light emitting device layer 20 includes an upper electrode, a light emitting layer and a lower electrode (not shown in the figure) which are stacked, and the upper electrode is disposed on a side of the light emitting layer facing away from the array substrate 10. The light emitting device is an organic light emitting device, and the light emitting layer is an organic light emitting layer where holes and electrons injected through the lower electrode and the upper electrode are combined with each other to emit light. Illustratively, the light emitting layer may be an organic light emitting layer and may further include at least one of common layers including a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, and an electron injection layer. However, the present embodiment is not limited thereto. For example, the light emitting layer may be an organic light emitting layer and may also include a common layer that performs various other functions.
In some embodiments, the light emitting device layer 20 includes a plurality of light emitting devices. Specifically, referring to fig. 1, the light emitting device layer 20 includes a plurality of red light emitting devices 21, a plurality of green light emitting devices 22, and a plurality of blue light emitting devices 23. The color filter layer 40 includes a plurality of filter units. Specifically, the color filter layer 40 includes a plurality of red filter units 421, a plurality of green filter units 422, and a plurality of blue filter units 423. Each filter unit is provided corresponding to a light emitting device of a corresponding color, that is, the red filter unit 421 is provided corresponding to the red light emitting device 21, the green filter unit 422 is provided corresponding to the green light emitting device 22, and the blue filter unit 423 is provided corresponding to the blue light emitting device 23.
With continued reference to fig. 1, the light emitting device layer 20 further includes a pixel defining layer 24, and a patterned pixel defining layer 24 may be formed on the array substrate 10, where the pixel defining layer 24 includes a plurality of opening regions, and a plurality of light emitting devices are located in each opening region.
The arrangement of the light emitting devices is not limited in the present application. For example, one red light emitting device 21, one green light emitting device 22, and one blue light emitting device 23 may be used as a repeating unit, and a plurality of repeating units may be repeatedly arranged at a predetermined rule on the array substrate to form the light emitting device layer 20. The repeating units may also include other combinations to provide a higher resolution of the display panel.
In other embodiments, the light emitting device layer 20 may be a white light emitting device layer, for example, one red filter unit 421 corresponding to one white light emitting device, one green filter unit 422 corresponding to one white light emitting device, and one blue filter unit 423 corresponding to one white light emitting device. At this time, one red filter unit 421, one green filter unit 422, and one blue filter unit 423 may be used as a repeating unit, and a plurality of repeating units may be repeatedly arranged on the encapsulation layer 30 at a predetermined rule. The repeating units may also include other combinations to provide a higher resolution of the display panel.
In some embodiments, the light blocking unit 41 included in the adjustment type filter structure 401 is a Black Matrix (BM). Illustratively, the light blocking unit 41 may be formed on a surface of the encapsulation layer 30 on a side facing away from the light emitting device layer 20 by means of film pasting, photolithography, laser processing, inkjet printing, 3D printing, screen printing, micro-contact printing, or the like. The light blocking unit 41 may block and absorb light, preventing crosstalk of light between the filter units.
In some embodiments, the surface of the adjusting filter unit facing the light emitting device layer 20 in the adjusting filter structure 401 is flush with the surface of the light blocking unit 41 facing the light emitting device layer. For example, referring to fig. 1, for the phenomenon that the display screen is bluish under a large viewing angle, the thickness of the blue filtering unit 423 in the adjusting filtering structure 401 may be set to be smaller than the thickness of the light blocking unit 41, so that the surface of the blue filtering unit 423 facing the light emitting device layer 20 is flush with the surface of the light blocking unit 41 facing the light emitting device layer, so that the surface of the blue filtering unit 423 in the adjusting filtering structure 401 facing away from the light emitting device layer 20 is lower than the surface of the light blocking unit 41 facing away from the light emitting device layer, and the higher light blocking unit 41 can block the blue light emitted by the blue filtering unit 423 in the adjusting filtering structure 401 under the large viewing angle, thereby alleviating or eliminating the phenomenon that the large viewing angle is bluish.
In some embodiments, the display panel 100 provided by the embodiments of the present invention further includes an encapsulation layer 30, the encapsulation layer 30 is located between the light emitting device layer 20 and the color filter layer 40, and the encapsulation layer 30 is used for sealing the light emitting device layer 20. The encapsulation layer 30 may be a thin film encapsulation layer, and specifically, the encapsulation layer 30 includes a plurality of inorganic layers and organic layers (not shown in the figure) alternately stacked. For example, the encapsulation layer 30 includes at least two inorganic layers and at least one organic layer, one layer of the encapsulation layer 30 close to the array substrate 10 is the inorganic layer, one layer of the encapsulation layer 30 far away from the array substrate 10 is also the inorganic layer, and the organic layer is between the two inorganic layers. The inorganic layer may be formed by Chemical Vapor Deposition (CVD), and the organic layer may be formed by Ink Jet Printing (IJP). Illustratively, the encapsulation layer 30 includes two inorganic layers and an organic layer disposed in a stacked arrangement with the organic layer disposed between the two inorganic layers. The material of the inorganic layer is preferably silicon nitride with a good water and oxygen blocking effect, but is not limited to silicon nitride; the material of the organic layer includes one or a combination of several of polyvinyl alcohol, urethane acrylate polymer, and polyimide resin, but the invention is not limited thereto.
In some embodiments, the encapsulation layer 30 has a first surface and a second surface opposite to each other, the first surface faces away from the light emitting device layer 20, the encapsulation layer 30 is formed with a plurality of recesses, the recesses are formed from the first surface to the second surface, and the adjustable filter unit is at least partially located in the recesses.
For example, for the phenomenon that a display screen is bluish under a large viewing angle, the blue filtering unit 423 in the adjustment type filtering structure 401 sinks a certain height into the groove of the encapsulation layer 30, so that a side surface of the blue filtering unit 423 facing away from the encapsulation layer 30 is lower than a side surface of the surrounding light blocking unit 41 facing away from the encapsulation layer 30, and the higher light blocking unit 41 can block blue light emitted under the large viewing angle, thereby alleviating or eliminating the phenomenon that the display screen is bluish under the large viewing angle.
In some embodiments, referring to fig. 3, the encapsulation layer 30 includes at least a first inorganic layer 31, an organic layer 32, and a second inorganic layer 33, which are stacked, the first inorganic layer 31 is located on a side of the organic layer 32 facing away from the light-emitting device layer 20, and the second inorganic layer 33 is located on a side of the organic layer 32 facing the light-emitting device layer 20; wherein, a plurality of concave parts are formed on the side of the first inorganic layer 31 opposite to the light-emitting device layer 20.
The recess is formed on the first inorganic layer 31 far away from the light emitting device in the encapsulation layer 30, so that the blue filtering unit 423 is at least partially located in the recess of the first inorganic layer 31, the surface of the blue filtering unit 423 facing away from the encapsulation layer 30 is lower than the surface of the surrounding light blocking unit 41 facing away from the encapsulation layer 30, and the higher light blocking unit 41 can block blue light emitted under a large viewing angle, thereby alleviating or eliminating the phenomenon that the large viewing angle is bluish.
Illustratively, the recess may be formed on the first inorganic layer 31 by inkjet printing, imprinting, etching, or the like, and the shape of the cross section of the recess perpendicular to the array substrate 10 is any one of a rectangle, a semi-ellipsoid, a semicircle, and an inverted trapezoid. Specifically, the shape of the recess may be set according to process conditions and actual requirements.
In some embodiments, referring to fig. 4, the encapsulation layer 30 includes at least a first inorganic layer 31, an organic layer 32, and a second inorganic layer 33, which are stacked, the first inorganic layer 31 is located on a side of the organic layer 32 facing away from the light-emitting device layer 20, and the second inorganic layer 33 is located on a side of the organic layer 32 facing the light-emitting device layer 20; a plurality of concave portions are formed on a side of the organic layer 32 facing away from the light emitting device layer 20, and at least a portion of the blue filtering unit 423 and the first inorganic layer 31 in the corresponding region are located in the concave portions. For example, after the organic layer 32 is formed on the second inorganic layer 33, a recess may be formed on the organic layer 32 by inkjet printing, imprinting, etching, or the like, and a shape of a cross section of the recess perpendicular to the array substrate 10 may be any one of a rectangle, a semi-ellipsoid, a semicircle, and an inverted trapezoid. Specifically, the shape of the first recess may be set according to process conditions and actual requirements. Then, the first inorganic layer 31 is normally deposited on the organic layer 32.
Illustratively, the depth of the blue filter unit 423 in the recess may be 10nm to 1000 nm. In general, the thickness of a single inorganic layer in the thin film encapsulation layer is smaller than that of a single organic layer, and a concave portion is formed from the organic layer 32 of the encapsulation layer 30, so that the depth of the blue filtering unit 423 is greater, that is, the light blocking unit 41 is higher than the blue filtering unit 423, and the higher light blocking unit 41 can more effectively block blue light emitted at a large viewing angle, thereby further alleviating or eliminating the phenomenon that the large viewing angle is bluish.
In some embodiments, the depressions may be formed starting from any one of the organic layers or any one of the inorganic layers of the encapsulation layer 30. Illustratively, the recess starts to be formed at the second inorganic layer 33 shown in fig. 4, which is not limited by the present invention.
In some embodiments, the light blocking unit 41 in the trim filter structure 401 has a protrusion 411, and the protrusion 411 is located on a side of the light blocking unit 41 facing away from the light emitting device layer 20 and close to the trim filter unit in the trim filter structure 401. The light blocking unit 41 around the adjustment type filter unit in the adjustment type filter structure 401 is provided with the protrusion 411, and the protrusion 411 of the light blocking unit 41 can block light of a corresponding color emitted under a large viewing angle, so that the phenomenon of color cast at the large viewing angle is relieved or eliminated.
For example, referring to fig. 5, for the phenomenon of blue shift with a large viewing angle, the blue filtering unit 423 is an adjustment type filtering unit, the light blocking unit 41 around the blue filtering unit 423 has a protrusion 411, and the protrusion 411 is located on a side of the light blocking unit 41 opposite to the light emitting device layer 20 and close to the blue filtering unit 423. The protrusion 411 and the light blocking unit 41 may be of an integral structure. The protrusion 411 is provided on the light blocking unit 41 around the blue filtering unit 423, and the protrusion 411 of the light blocking unit 41 can block blue light emitted under a large viewing angle, thereby alleviating or eliminating the phenomenon that the large viewing angle is bluish.
Further, the protrusion 411 is a continuous structure surrounding the adjusting type filter unit in the adjusting type filter structure 401, or the protrusion 411 is a discontinuous structure surrounding the adjusting type filter unit in the adjusting type filter structure 401. Referring to fig. 6, for the phenomenon that the display image with a large viewing angle is blue, the protrusion 411 is a discontinuous structure surrounding the blue filter unit 423, specifically, the protrusion 411 includes a plurality of protrusion units 4110, the protrusion units 4110 are arranged at intervals, and preferably, the protrusion units 4110 can be arranged at equal intervals. The plurality of protrusion units 4110 are arranged at intervals, and the arrangement density of the protrusion units 4110 can be adjusted, so that the light output amount of the light rays with the corresponding color at a large viewing angle is controlled, and the color cast at the large viewing angle is further relieved or eliminated.
In some embodiments, a surface of a side of the adjustment type filter unit facing away from the light emitting device layer in the adjustment type filter structure 401 is a surface protruding toward a direction facing away from the light emitting device layer 20. Referring to fig. 7, for the phenomenon of bluish with a large viewing angle, a surface of the blue filter unit 423 on a side opposite to the light emitting device layer 20 is set to be a convex surface facing a direction opposite to the light emitting device layer 20. The surface of the side of the blue filter unit 423 facing away from the light emitting device layer 20 is provided as a surface protruding in a direction facing away from the light emitting device layer 20, so that the blue filter unit 423 constitutes a light condensing structure. When the blue emergent light L is emitted from the convex surface at a large viewing angle, the blue emergent light L deviates from the original path L1 and becomes emitted along the actual path L2, that is, the blue filter unit 423 with the convex structure gathers the blue emergent light in a direction perpendicular to the display panel, so that the light emitting amount of the blue emergent light at the large viewing angle can be reduced, and the phenomenon that the large viewing angle is blue can be further alleviated or eliminated.
In some embodiments, scattering particles are distributed in the primary filter cells in at least a portion of the primary filter structure. For example, referring to fig. 1, for the blue-to-blue phenomenon with a large viewing angle, the red filter unit 421 and the green filter unit 422 are initial filter units of the color filter layer 40, and at least a portion of the red filter unit 421 may have scattering particles distributed therein; and/or, scattering particles are distributed in at least a portion of green filter element 422. The scattering particles are disposed in the red filter unit 421 and/or the green filter unit 422, so as to increase the light emitting area of the red light and/or the green light, thereby increasing the light emitting amount of the red light and/or the green light under a large viewing angle, and further alleviating or eliminating the blue phenomenon of the large viewing angle.
In the above embodiments and views, both the phenomenon that a display screen is bluish under a large viewing angle is taken, and the blue filtering unit is taken as an adjustable filtering unit as an example, and the structures of the blue filtering unit 423 in the adjustable filtering structure 401 and the light blocking unit 41 surrounding the blue filtering unit 423 are described, and a person skilled in the art can set at least part of the red filtering unit 421 or at least part of the green filtering unit 422 as the structure of the blue filtering unit 423 described above according to actual needs, which is not described herein again.
The embodiment of the invention also provides a display device, which comprises the display panel 100, and the display device can be applied to any product or component with a display function, such as a virtual reality device, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a wearable watch, an internet of things node, and the like. Since the principle of the display device to solve the problem is similar to the display panel 100, the display device can be implemented by referring to the implementation of the display panel 100, and repeated descriptions are omitted.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. 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 invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A display panel, comprising:
a light emitting device layer including a plurality of light emitting devices arranged in an array;
the color filter layer is arranged on the light emitting side of the light emitting device layer and comprises a plurality of initial type filter structures and a plurality of adjusting type filter structures, each adjusting type filter structure comprises an adjusting type filter unit and a light blocking unit formed by surrounding the adjusting type filter unit, the surface of the adjusting type filter unit, which is back to the light emitting device layer, is sunk and molded relative to the direction of the surface of the light blocking unit, which is back to the light emitting device layer, facing the light emitting device layer, and the surface of the initial type filter structure, which is back to the light emitting device layer, is flush with the surface of the light blocking unit, which is back to the light emitting device layer.
2. The display panel of claim 1, wherein a surface of the adjusting filter unit facing the light emitting device layer is flush with a surface of the light blocking unit facing the light emitting device layer.
3. The display panel according to claim 1, further comprising an encapsulation layer between the color filter layer and the light-emitting device layer, the encapsulation layer sealing the light-emitting device layer;
the packaging layer is provided with a first surface and a second surface which are opposite, the first surface faces back to the light-emitting device layer, the packaging layer is provided with a plurality of concave parts, the concave parts are formed by the first surface being concave to the second surface, and at least part of the adjusting type light filtering unit is positioned in the concave parts.
4. The display panel according to claim 3, wherein the encapsulation layer comprises at least a first inorganic layer, an organic layer and a second inorganic layer, which are stacked, the first inorganic layer being located on a side of the organic layer facing away from the light-emitting device layer, and the second inorganic layer being located on a side of the organic layer facing toward the light-emitting device layer;
wherein the first inorganic layer is formed with the plurality of recesses on a side facing away from the light emitting device layer.
5. The display panel according to claim 3, wherein the encapsulation layer comprises at least a first inorganic layer, an organic layer and a second inorganic layer, which are stacked, the first inorganic layer being located on a side of the organic layer facing away from the light-emitting device layer, and the second inorganic layer being located on a side of the organic layer facing toward the light-emitting device layer;
the side of the organic layer, which faces away from the light-emitting device layer, is provided with a plurality of concave parts, and the adjusting type light filtering unit is at least partially positioned in the concave parts and the first inorganic layer in the corresponding area is positioned in the concave parts.
6. The display panel according to claim 1, wherein the light blocking unit in the adjusting filter structure has a protrusion located on a side of the light blocking unit facing away from the light emitting device layer and close to the adjusting filter unit.
7. The display panel according to claim 6, wherein the protrusion is a continuous structure surrounding the adjusting filter unit, or the protrusion is a discontinuous structure surrounding the adjusting filter unit.
8. The display panel according to claim 1, wherein a surface of a side of the adjustment type filter unit facing away from the light emitting device layer is a surface convex in a direction facing away from the light emitting device layer.
9. The display panel according to any of claims 1-8, wherein scattering particles are distributed in the initial filter cells in at least part of the initial filter structures.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN111613647B (en) * | 2020-04-24 | 2023-12-19 | 合肥维信诺科技有限公司 | Display panel |
| CN111613655A (en) * | 2020-05-27 | 2020-09-01 | 合肥维信诺科技有限公司 | Display panel, manufacturing method thereof and display device |
| CN111864105A (en) * | 2020-07-09 | 2020-10-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN113571552B (en) * | 2021-07-02 | 2023-10-31 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN114023903A (en) * | 2021-10-28 | 2022-02-08 | 武汉华星光电半导体显示技术有限公司 | OLED display panel |
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