Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises an array substrate, a plurality of light-emitting units arranged at intervals, a packaging layer, an insulating layer and a color filter layer, a first opening is formed in the insulating layer, the orthographic projection of the first opening on the array substrate is overlapped with the orthographic projection of the light-emitting units on the array substrate, and the color filter layer is arranged on the packaging layer; at least part of the color filter layer is arranged in the first opening, the surface, making contact with the insulating layer, of the color filter layer comprises a first interface, and part of light emitted by the light emitting unit is refracted on the first interface. According to the display panel, on the basis that the PLP technology and the MLP technology are combined, the light-emitting units form refraction at the second interface through the scheme, the emergent light of the display panel is increased, and therefore the light emitting efficiency of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] In order to reduce the power consumption of OLED panels and improve the efficiency of OLED screens, panel manufacturers continue to introduce new technologies. Currently, OLED panels are developing in the direction of large size, high refresh rate, and high brightness. However, in the absence of a breakthrough in battery technology, the market has put forward higher requirements on the power consumption of OLED products.

[0003] Among them, the polarizer (POL) can effectively reduce the reflectivity of the panel under strong light, but it loses nearly 58% of the light output. This greatly increases the life burden of OLED; on the other hand, the polarizer is thick and brittle, which is not conducive to the development of dynamic bending products. In related technologies, there is a POL-less (PLP) technology that uses a color filter (Color Filter) to replace the polarizer (POL). It can not only greatly reduce the thickness of the functional layer, but also can better improve the light output rate. Therefore, the POL-less technology based on the color filter is considered to be one of the key technologies for realizing the development of dynamic bending products.

[0004] In addition, with the help of geometric optics, a micro-array (Micro lens Pattern, MLP) is set up inside the OLED screen to converge the more divergent light emitted by the OLED screen to just above the screen, which is one of the effective means to improve the efficiency of the OLED screen.

[0005] Although some display panels that can combine the PLP technology and the MLP technology have appeared in the related art to reduce the power consumption of the display panels, the light output efficiency of these display panels is low. Summary of the invention

[0006] Embodiments of the present application provide a display panel and a display device to solve the problem of low light extraction efficiency of a display panel combining the PLP technology and the MLP technology in the related art.

[0007] To solve the above problems, the technical solutions provided by this application are as follows:

[0008] In a first aspect, the present application provides a display panel, comprising:

[0009] An array substrate;

[0010] A plurality of light emitting units are arranged on the array substrate at intervals;

[0011] An encapsulation layer, disposed on a side of the light emitting unit away from the array substrate and covering the light emitting unit;

[0012] An insulating layer, disposed on a side of the encapsulation layer away from the array substrate, the insulating layer being provided with a first opening, the orthographic projection of the first opening on the array substrate overlapping with the orthographic projection of the light emitting unit on the array substrate;

[0013] a color filter layer, disposed on a side of the encapsulation layer away from the array substrate, and the color filter layer is at least partially disposed in the first opening; and

[0014] The surface of the color filter layer in contact with the insulating layer includes a first interface, and part of the light emitted by the light-emitting unit is refracted on the first interface.

[0015] In one embodiment, the display panel further includes:

[0016] An optical adhesive layer, disposed on a side of the color filter layer away from the array substrate;

[0017] The surface of the color filter layer in contact with the optical adhesive layer comprises a second interface, and part of the light emitted by the light emitting unit is refracted on the first interface and at least passes through the second interface.

[0018] In one embodiment, the surface of the color filter layer in contact with the optical adhesive layer further includes a third interface, and part of the light emitted by the light emitting unit is totally reflected on the third interface.

[0019] In one embodiment, a cross-sectional shape of a portion of the color filter layer located in the first opening is an inverted trapezoid.

[0020] In one embodiment, a cross-sectional shape of a portion of the color filter layer extending beyond the first opening is a regular trapezoid, and a maximum width of the regular trapezoid is greater than a maximum width of the inverted trapezoid.

[0021] In one embodiment, a refractive index of the color filter layer is greater than a refractive index of the insulation layer.

[0022] In one embodiment, the refractive index of the color filter layer is smaller than the refractive index of the optical adhesive layer.

[0023] In one embodiment, in a top-view direction of the display panel, the color filter layer is in a circular ring shape, and the light-emitting unit is in a circular shape and is located at the center of the circular color filter layer.

[0024] In one embodiment, the display panel further includes:

[0025] The light shielding layer is arranged on a side of the insulating layer away from the array substrate, and the light shielding layer is located between two adjacent color filter layers and in contact with the color filter layers.

[0026] In one embodiment, the display panel further includes: a touch metal layer, which is at least partially disposed in the insulating layer and connected to the light shielding layer, and the orthographic projection of the touch metal layer on the array substrate overlaps with the orthographic projection of the light shielding layer on the array substrate.

[0027] In a second aspect, the present application also provides a display device, comprising the aforementioned display panel.

[0028] The embodiment of the present application provides a display panel, comprising an array substrate; a plurality of light-emitting units arranged at intervals on the array substrate; an encapsulation layer arranged on a side of the light-emitting unit away from the array substrate and covering the light-emitting unit; an insulating layer arranged on a side of the encapsulation layer away from the array substrate, a first opening being provided on the insulating layer, and an orthographic projection of the first opening on the array substrate overlapping with an orthographic projection of the light-emitting unit on the array substrate; a color filter layer arranged on a side of the encapsulation layer away from the array substrate, and a portion of the color filter layer is arranged in the first opening; and an optical adhesive layer arranged on a side of the color filter layer away from the array substrate; wherein the surface of the color filter layer in contact with the insulating layer comprises a first interface, and the surface of the color filter layer in contact with the optical adhesive layer comprises a second interface, and part of the light emitted by the light-emitting unit is refracted on the first interface and at least passes through the second interface. Based on the combination of the PLP technology and the MLP technology, the present application enables the light-emitting unit to form refraction at the second interface through the above scheme, thereby increasing the outgoing light of the display panel, thereby improving the light extraction efficiency of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Attached Figure 1 is a schematic diagram of a cross-sectional structure of a display panel in an embodiment of the present application;

[0031] Attached Figure 2 is a top view of an optional color filter layer in an embodiment of the present application;

[0032] Attached Figure 3 is a schematic diagram of a manufacturing process of a display panel in an embodiment of the present application;

[0033] Attached Figure 4 Schematic diagram of the structure of the display device in the embodiment of the present application.

[0034] Description of reference numerals in the figures:

[0035] 10. Display device; 100. Display panel; 110. Array substrate; 120. Light-emitting unit; 130. Encapsulation layer; 140. Insulation layer; 140a. First opening; 150. Color filter layer; 151. First interface; 152. Second interface; 153. Third interface; 160. Optical adhesive layer. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] In the drawings, the thickness of layers, films, panels, regions, etc. may be exaggerated for clarity and for better understanding and ease of description. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it can be directly on the other element or intervening elements may also be present.

[0038] Reference Figure 1 As shown, according to the first aspect of the present application, the present application provides a display panel 100, including an array substrate 110, a light-emitting unit 120, an encapsulation layer 130, an insulating layer 140, a color filter layer 150 and an optical adhesive layer 160, wherein a plurality of light-emitting units 120 are provided, and the plurality of light-emitting units 120 are arranged at intervals on the array substrate 110, the encapsulation layer 130 is arranged on a side of the light-emitting unit 120 away from the array substrate 110 and covers the light-emitting unit 120, the insulating layer 140 is arranged on a side of the encapsulation layer 130 away from the array substrate 110, the color filter layer 150 is arranged on a side of the encapsulation layer 130 away from the array substrate 110, and the optical adhesive layer 160 is arranged on a side of the color filter layer 150 away from the array substrate 110.

[0039] Specifically, in some embodiments of the present application, a first opening 140a is provided on the insulating layer 140, the orthographic projection of the first opening 140a on the array substrate 110 overlaps with the orthographic projection of the light-emitting unit 120 on the array substrate 110, and the color filter layer 150 is at least partially disposed in the first opening 140a.

[0040] Through the above arrangement, the combination of the PLP structure and the MLP structure of the display panel 100 is basically completed. On this basis, the surface where the color filter layer 150 of the present application contacts the insulating layer 140 includes a first interface 151, and part of the light emitted by the light-emitting unit 120 is refracted on the first interface 151.

[0041] In some embodiments of the present application, the surface of the color filter layer 150 in contact with the optical adhesive layer 160 further includes a second interface 152, and part of the light emitted by the light-emitting unit 120 is refracted on the first interface 151 and at least passes through the second interface 152. It should be noted that the second interface 152 is parallel to the plane where the array substrate 110 is located. The light emitted by the light-emitting unit 120 is refracted through the first interface 151, which increases the number of outgoing light in the display panel 100, thereby improving the light extraction efficiency of the display panel 100. It should be noted that in order to allow the light emitted by the light-emitting unit 120 to be refracted at the first interface 151, in some embodiments of the present application, the refractive index of the insulating layer 140 needs to be less than the refractive index of the color filter layer 150.

[0042] More specifically, in some embodiments of the present application, the cross-sectional shape of the first opening 140a is an inverted trapezoid so that the color filter layer 150 formed in the first opening 140a is an inverted trapezoid, wherein the inclined surface of the inverted trapezoid close to the light-emitting unit 120 is the first interface 151, and the upper surface of the entire color filter layer 150 is the second interface 152. In this embodiment, since the color filter layer 150 in the first opening 140a is an inverted trapezoid, more light can pass through the color filter layer 150 to be emitted, thereby increasing the light-emitting viewing angle of the light-emitting unit 120 and improving the brightness of the display panel 100. It should be noted that, without affecting the function of the color filter layer 150, the ratio of the cross-sectional width of the first opening 140a away from the array substrate 110 to the cross-sectional width of the first opening 140a close to the array substrate 110 can be increased as much as possible, and the present application does not limit this.

[0043] In some embodiments of the present application, the surface of the color filter layer 150 in contact with the optical adhesive layer 160 further includes a third interface 153, and part of the light emitted by the light emitting unit 120 is totally reflected on the third interface 153. It should be noted that the light that is totally reflected by the third interface 153 will directly pass through the optical adhesive layer 160. Similarly, in order to allow the light emitted by the light emitting unit 120 to be totally reflected at the third interface 153, in some embodiments of the present application, the refractive index of the color filter layer 150 is less than the refractive index of the optical adhesive layer 160.

[0044] More specifically, in some embodiments of the present application, the cross-sectional shape of the portion of the color filter layer 150 that exceeds the first opening 140a is a regular trapezoid, and the maximum width of the regular trapezoid is greater than the maximum width of the inverted trapezoid. Among them, the inclined surface of the hypotenuse of the regular trapezoid close to the side of the light-emitting unit 120 is the third interface 153, and the upper surface of the regular trapezoid is the second interface 152. In this embodiment, since the maximum width of the regular trapezoid is greater than the maximum width of the inverted trapezoid, that is, the length of the lower side of the regular trapezoid is greater than the length of the upper side of the inverted trapezoid, more light emitted by the light-emitting unit 120 can pass through the insulating layer 140 and then be directly totally reflected to the optical adhesive layer 160 via the third interface 153, thereby avoiding the probability of light incident from the first interface 151 and then emitted from the third interface 153 as much as possible, which is conducive to improving the light extraction efficiency. It should be noted that, without affecting the function of the color filter layer 150, the ratio of the cross-sectional width of the color filter layer 150 that exceeds the first opening 140a and is away from the array substrate 110 to the cross-sectional width of the right trapezoidal portion of the color filter layer 150 that exceeds the first opening 140a and is close to 1, but is always greater than 1, so that as much light as possible can be totally reflected through the third interface 153.

[0045] Reference Figure 2 As shown, in some embodiments of the present application, the color filter layer 150 of the present application is in the shape of a ring in the top view direction of the display panel 100, the light emitting unit 120 is in the shape of a circle in the top view direction of the display panel 100, and the light emitting unit 120 is located at the center of the color filter layer 150. The inner diameter of the ring formed by the color filter layer 150 is larger than the diameter of the circle formed by the light emitting unit 120. Through this arrangement, the light emitted by the light emitting unit 120 and located around the light emitting unit 120 can be absorbed by the color filter layer 150 as much as possible, and the light directly above the light emitting unit 120 can directly pass through the encapsulation layer 130, the insulating layer 140 and the optical adhesive layer 160, which is beneficial to improve the light emitting efficiency of the display panel 100.

[0046] In some embodiments of the present application, the display panel 100 also includes a light-shielding layer, which is arranged on the side of the insulating layer 140 away from the array substrate 110, and the light-shielding layer is located between two adjacent color filter layers 150 and in contact with the color filter layers 150, wherein the height of the light-shielding layer does not exceed. By setting the light-shielding layer, the sub-pixel light-emitting area can be divided and the color mixing between adjacent pixels can be reduced.

[0047] In addition, in some embodiments, the display panel 100 of the present application is a touch display panel 100, therefore, the display panel 100 also includes a touch metal layer, which is at least partially disposed in the insulating layer 140 and connected to the light-shielding layer, and the orthographic projection of the touch metal layer on the array substrate 110 overlaps with the orthographic projection of the light-shielding layer on the array substrate 110.

[0048] Specifically, in some embodiments, the touch metal layer includes a first touch metal layer and a second touch metal layer, and the insulating layer 140 includes a first insulating layer 140 and a second insulating layer 140. The first insulating layer 140 is disposed on a side of the encapsulation layer 130 away from the array substrate 110, the second insulating layer 140 is disposed on a side of the first insulating layer 140 away from the array substrate 110, a second opening is further disposed on the second insulating layer 140, the first touch metal layer is disposed in the second opening, a portion of the second touch metal layer is also disposed in the second opening and connected to the light shielding layer with the first touch metal layer, and a portion of the second touch metal layer exceeding the second opening.

[0049] In this embodiment, since the reflectivity of the black light shielding layer is low, the reflection of the touch metal layer can be effectively reduced by arranging the touch metal layer below the light shielding layer. It should be noted that although the touch metal layer described in this embodiment is connected to the light shielding layer, in the actual structure, the first touch metal layer, the second touch metal layer and the light shielding layer may not be in contact with each other, and are separated from each other by the insulating layer 140. In this embodiment, the orthographic projection of the light shielding layer on the array substrate 110 completely overlaps with the orthographic projection of the touch metal layer on the array substrate 110.

[0050] In the above-mentioned embodiments, it should be noted that the array substrate 110 may include a substrate, a barrier layer, a buffer layer, a semiconductor layer, a gate insulating layer 140, a gate electrode, a first interlayer insulating layer 140, a source electrode and a drain electrode, a second interlayer insulating layer 140, a first electrode, a pixel defining layer, an organic emission layer and a second electrode. The thickness of each film layer can be set according to the thickness of the actual product, and the embodiments of the present application do not make further limitations.

[0051] Among them, the semiconductor layer is divided into a channel region and a source region and a drain region formed on both sides of the channel region. The channel region of the semiconductor is polysilicon without doping impurities, that is, an intrinsic semiconductor. The source region and the drain region are polysilicon doped with conductive impurities, that is, impurity semiconductors. The impurities doped in the source region and the drain region can be any one of P-type impurities and N-type impurities. The gate electrode is formed on the gate insulating layer 140, and the gate electrode overlaps with the channel region. The source electrode is connected to the source region through the source contact hole, and the drain electrode is connected to the drain region through the drain contact hole. Among them, the gate electrode, the source electrode, and the drain electrode are respectively the control electrode, the input electrode, and the output electrode of the thin film transistor in the display panel 100 driving circuit, and form a thin film transistor together with the semiconductor. The channel of the thin film transistor is formed in the semiconductor between the source electrode and the drain electrode. When setting a more specific film layer structure, it can be set according to the film layer structure of a common thin film transistor, which will not be repeated here.

[0052] In addition, the first electrode may be the anode of the organic light emitting diode of the display panel 100, the second electrode may be the cathode of the organic light emitting diode, and the organic emission layer may be formed by a plurality of layers including one or more emission layers, a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL). In the case where the organic emission layer includes all of the above layers, the hole injection layer (HIL) may be located on the first electrode, and the hole transport layer (HTL), the emission layer, the electron transport layer (ETL), and the electron injection layer (EIL) may be sequentially laminated on the hole injection layer (HIL). Therefore, the first electrode, the organic emission layer, and the second electrode form an organic light emitting element, that is, the aforementioned light emitting unit 120 of the present application, and the encapsulation layer 130 covering the light emitting unit 120 may be formed by alternately laminating one or more organic layers and one or more inorganic layers. Multiple inorganic layers or organic layers may each be provided.

[0053] Reference Figure 3 As shown, the present application also provides a method for manufacturing the display panel 100, which may include the following steps:

[0054] S1: After the process of manufacturing the second touch metal layer, a mask is added to pattern the area where the non-touch metal layer is located, so as to form a first opening 140 a exposing the encapsulation layer 130 on the insulating layer 140 ;

[0055] S2: Filling the first opening 140 a with a color filter material to form a color filter layer 150 , and filling the gaps between the color filter layers 150 with a light shielding layer;

[0056] In this step, it should be noted that the refractive index of the color filter layer 150 is greater than the refractive index of the insulating layer 140 , the color filter layer 150 is only filled near the light-emitting units 120 of the same color, and the height of the shading layer does not exceed the height of the color filter layer 150 .

[0057] S3: Finally, an optical adhesive layer 160 is formed on the color filter layer 150;

[0058] In this step, it should be noted that the refractive index of the optical adhesive layer 160 is greater than the refractive index of the color filter layer 150 , and the optical adhesive layer 160 also serves as a flat layer.

[0059] Reference Figure 4 As shown, according to the second aspect of the present application, the present application further provides a display device 10, which includes the display panel 100 of any of the aforementioned embodiments. Therefore, the display device 10 also includes all the beneficial effects of the aforementioned display surface, which will not be repeated in this application.

[0060] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A display panel, characterized in that: include: An array substrate; A plurality of light emitting units are arranged on the array substrate at intervals; An encapsulation layer, disposed on a side of the light emitting unit away from the array substrate and covering the light emitting unit; An insulating layer, disposed on a side of the encapsulation layer away from the array substrate, the insulating layer being provided with a first opening, the orthographic projection of the first opening on the array substrate overlapping with the orthographic projection of the light emitting unit on the array substrate; A color filter layer is disposed on a side of the encapsulation layer away from the array substrate, and the color filter layer is at least partially disposed in the first opening; as well as The surface of the color filter layer in contact with the insulating layer includes a first interface, and part of the light emitted by the light-emitting unit is refracted on the first interface.

2. The display panel according to claim 1, characterized in that: The display panel further includes: An optical adhesive layer, disposed on a side of the color filter layer away from the array substrate; The surface of the color filter layer in contact with the optical adhesive layer comprises a second interface, and part of the light emitted by the light emitting unit is refracted on the first interface and at least passes through the second interface.

3. The display panel according to claim 1, characterized in that: The surface of the color filter layer in contact with the optical adhesive layer further includes a third interface, and part of the light emitted by the light-emitting unit is totally reflected on the third interface.

4. The display panel according to claim 2, characterized in that: The cross-sectional shape of the portion of the color filter layer located in the first opening is an inverted trapezoid.

5. The display panel according to claim 3, characterized in that: The cross-sectional shape of the portion of the color filter layer that exceeds the first opening is a regular trapezoid, and the maximum width of the regular trapezoid is greater than the maximum width of the inverted trapezoid.

6. The display panel according to any one of claims 1 to 5, characterized in that: The refractive index of the color filter layer is greater than the refractive index of the insulating layer.

7. The display panel according to claim 6, characterized in that: The refractive index of the color filter layer is smaller than the refractive index of the optical adhesive layer.

8. The display panel according to claim 1, characterized in that: In a top-view direction of the display panel, the color filter layer is in a circular ring shape, and the light-emitting unit is in a circular shape and is located at the center of the circular color filter layer.

9. The display panel according to claim 1, characterized in that: The display panel further includes: The light shielding layer is arranged on a side of the insulating layer away from the array substrate, and the light shielding layer is located between two adjacent color filter layers and in contact with the color filter layers.

10. The display panel according to claim 9, characterized in that: The display panel further includes: a touch metal layer, which is at least partially disposed in the insulating layer, and an orthographic projection of the touch metal layer on the array substrate overlaps with an orthographic projection of the light shielding layer on the array substrate.

11. A display device, characterized in that: A display panel comprising any one of claims 1 to 10.

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