Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises an array substrate, a plurality of spaced light emitting units, an encapsulation layer, an insulating layer and a color filter layer. The insulating layer is provided with a first opening. The orthographic projection of the first opening on the array substrate overlaps the orthographic projection of the light emitting unit on the array substrate. The color filter layer is at least partially arranged in the first opening. The surface of the color filter layer in contact with the insulating layer comprises a first interface. Part of the light emitted by the light emitting unit is refracted on the first interface. The application combines the PLP technology and the MLP technology. The light emitting unit is refracted at the second interface by the above scheme. The light emitted by the display panel is increased. The light emitting efficiency of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] To reduce the power consumption of OLED panels and improve the efficiency of OLED screens, panel manufacturers are constantly introducing new technologies. Currently, OLED panels are developing towards larger sizes, higher refresh rates, and higher brightness. However, without a significant breakthrough in battery technology, the market is placing higher demands on the power consumption of OLED products.

[0003] While polarizers (POLs) effectively reduce the reflectivity of panels under strong light, they also result in a loss of nearly 58% of light output. This significantly increases the lifespan burden for OLEDs. Furthermore, polarizers are relatively thick and brittle, hindering the development of dynamically bendable products. In related technologies, there exists POL-less (PLP) technology, which uses color filters to replace polarizers (POLs). This technology not only significantly reduces the thickness of the functional layer but also effectively improves light output. Therefore, POL-less technology based on color filters is considered one of the key technologies for developing dynamically bendable products.

[0004] In addition, by using geometric optics to set up a micro-array (Micro lens pattern, MLP) inside the OLED screen, the relatively divergent light emitted by the OLED screen can be focused onto the top of the screen, which is one of the effective means to improve the efficiency of the OLED screen.

[0005] Although some display panels that combine PLP and MLP technologies have emerged to reduce power consumption, these panels still have low light emission efficiency. Summary of the Invention

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

[0007] To solve the above problems, the technical solution provided in this application is as follows:

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

[0009] Array substrate;

[0010] Multiple light-emitting units are spaced apart on the array substrate;

[0011] An encapsulation layer is disposed on the side of the light-emitting unit away from the array substrate and covers the light-emitting unit;

[0012] An insulating layer is disposed on the side of the encapsulation layer away from the array substrate. The insulating layer has a first opening, and the orthographic projection of the first opening on the array substrate overlaps with the orthographic projection of the light-emitting unit on the array substrate.

[0013] A color filter layer is disposed on the 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 in contact with the insulating layer of the color filter layer includes a first interface, and some of the light emitted by the light-emitting unit is refracted at the first interface.

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

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

[0017] The surface in contact with the color filter layer and the optical adhesive layer includes a second interface, and some of the light emitted by the light-emitting unit is refracted at the first interface and passes through at least 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, on which some of the light emitted by the light-emitting unit undergoes total internal reflection.

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

[0020] In one embodiment, the cross-sectional shape of the portion of the color filter layer extending beyond 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.

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

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

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

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

[0025] A light-shielding layer is disposed on the 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, at least partially disposed in the insulating layer and connected to the light-shielding layer, wherein 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] Secondly, this application also provides a display device, including the aforementioned display panel.

[0028] This application provides a display panel including an array substrate; a plurality of light-emitting units spaced apart on the array substrate; an encapsulation layer disposed on the side of the light-emitting units away from the array substrate and covering the light-emitting units; an insulating layer disposed on the side of the encapsulation layer away from the array substrate, the insulating layer having a first opening, the orthographic projection of the first opening on the array substrate overlapping the orthographic projection of the light-emitting units on the array substrate; a color filter layer disposed on the side of the encapsulation layer away from the array substrate, and the color filter layer being partially disposed in the first opening; and an optical adhesive layer disposed on the 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 includes a first interface, the surface of the color filter layer in contact with the optical adhesive layer includes a second interface, and a portion of the light emitted by the light-emitting units is refracted at the first interface and at least passes through the second interface. Based on a combination of PLP and MLP technologies, this application achieves refraction at the second interface through the above solution, increasing the emitted light of the display panel and thus improving the light extraction efficiency of the display panel. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Appendix Figure 1 This is a schematic cross-sectional view of the display panel in an embodiment of this application;

[0031] Appendix Figure 2 This is a top view of an optional color filter layer in an embodiment of this application;

[0032] Appendix Figure 3 This is a schematic diagram of the manufacturing process of the display panel in the embodiments of this application;

[0033] Appendix Figure 4 This is a schematic diagram of the display device in the embodiments of this application.

[0034] Explanation of the reference numerals in the figure:

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

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the accompanying drawings, the thickness of layers, films, plates, regions, etc., may be exaggerated for clarity, better understanding, and ease of description. It should be understood that when an element such as a layer, film, region, or substrate is referred to as "located on another element," it may be located directly on the other element or there may be inserted elements.

[0038] Reference Figure 1 As shown, according to a first aspect of this application, this application provides a display panel 100, including an array substrate 110, light-emitting units 120, an encapsulation layer 130, an insulating layer 140, a color filter layer 150, and an optical adhesive layer 160. The light-emitting units 120 are provided in multiples, and the multiple light-emitting units 120 are spaced apart on the array substrate 110. The encapsulation layer 130 is disposed on the side of the light-emitting units 120 away from the array substrate 110 and covers the light-emitting units 120. The insulating layer 140 is disposed on the side of the encapsulation layer 130 away from the array substrate 110. The color filter layer 150 is disposed on the side of the encapsulation layer 130 away from the array substrate 110. The optical adhesive layer 160 is disposed on the side of the color filter layer 150 away from the array substrate 110.

[0039] Specifically, in some embodiments of this application, the insulating layer 140 is provided with a first opening 140a, 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] With the above settings, the combination of the PLP structure and the MLP structure of the display panel 100 is basically completed. On this basis, the surface in contact between the color filter layer 150 and the insulating layer 140 includes a first interface 151, and some of the light emitted by the light-emitting unit 120 is refracted on the first interface 151.

[0041] In some embodiments of this application, the surface in contact between the color filter layer 150 and the optical adhesive layer 160 further includes a second interface 152. A portion of the light emitted by the light-emitting unit 120 is refracted at the first interface 151 and passes through at least the second interface 152. It should be noted that the second interface 152 is parallel to the plane of the array substrate 110. By refracting the light emitted by the light-emitting unit 120 through the first interface 151, the number of emitted light rays in the display panel 100 is increased, thereby improving the light extraction efficiency of the display panel 100. It should be noted that, in order for the light emitted by the light-emitting unit 120 to be refracted at the first interface 151, in some embodiments of this 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 this 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 also an inverted trapezoid. The inclined surface of the inverted trapezoid near 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, because the color filter layer 150 in the first opening 140a is an inverted trapezoid, more light can pass through the color filter layer 150 and exit, increasing the light-emitting 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 near the array substrate 110 can be increased as much as possible; this application does not impose any limitations on this.

[0043] In some embodiments of this application, the surface in contact between the color filter layer 150 and the optical adhesive layer 160 further includes a third interface 153, at which some of the light emitted by the light-emitting unit 120 undergoes total internal reflection. It should be noted that the light after total internal reflection at the third interface 153 will directly pass through the optical adhesive layer 160. Similarly, in order to ensure that the light emitted by the light-emitting unit 120 undergoes total internal reflection at the third interface 153, in some embodiments of this 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 this application, the cross-sectional shape of the portion of the color filter layer 150 extending beyond the first opening 140a is a regular trapezoid, with the maximum width of the regular trapezoid being greater than the maximum width of the inverted trapezoid. The inclined surface of the regular trapezoid near 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, because the maximum width of the regular trapezoid is greater than the maximum width of the inverted trapezoid (i.e., 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 from the light-emitting unit 120 can pass through the insulating layer 140 and be directly reflected by the third interface 153 to the optical adhesive layer 160. This minimizes the probability of light entering from the first interface 151 and then exiting from the third interface 153, thus improving 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 extending beyond the first opening 140a on the side away from the array substrate 110 to the cross-sectional width of the trapezoidal portion of the color filter layer 150 extending beyond the first opening 140a on the side close to the array substrate 110 can be close to 1, but 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 this application, the color filter layer 150 is annular in shape when viewed from above the display panel 100, and the light-emitting unit 120 is circular in shape when viewed from above the display panel 100, with the light-emitting unit 120 located at the center of the color filter layer 150. The inner diameter of the annulus formed by the color filter layer 150 is larger than the diameter of the circle formed by the light-emitting unit 120. This arrangement allows the light emitted by the light-emitting unit 120 surrounding it to be absorbed by the color filter layer 150 as much as possible, while 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 for improving the luminous efficiency of the display panel 100.

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

[0047] In addition, in some embodiments, the display panel 100 of this 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. 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 the side of the encapsulation layer 130 away from the array substrate 110, and the second insulating layer 140 is disposed on the side of the first insulating layer 140 away from the array substrate 110. The second insulating layer 140 also has a second opening, in which the first touch metal layer is disposed, and a portion of the second touch metal layer is also disposed in the second opening and connected to the first touch metal layer. The portion of the second touch metal layer extending beyond the second opening is connected to a light-shielding layer.

[0049] In this embodiment, since the black light-shielding layer has low reflectivity, the reflection of the touch metal layer can be effectively reduced by placing 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 and may be separated from each other by an 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 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 emitting layer and a second electrode. The thickness of each film layer can be set according to the thickness of the actual product. This application embodiment does not make further limitations.

[0051] The semiconductor layer is divided into a channel region and source and drain regions formed on both sides of the channel region. The channel region of the semiconductor is undoped polysilicon, i.e., intrinsic semiconductor. The source and drain regions are doped polysilicon with conductive impurities, i.e., spurious semiconductors. The impurities doped in the source and drain regions can be either P-type or N-type impurities. The gate electrode is formed on the gate insulating layer 140 and overlaps with the channel region. The source electrode passes through a source contact hole and connects to the source region, and the drain electrode passes through a drain contact hole and connects to the drain region. The gate electrode, source electrode, and drain electrode are respectively the control electrode, input electrode, and output electrode of the thin-film transistor in the driving circuit of the display panel 100, and together with the semiconductor, form the thin-film transistor. The channel of the thin-film transistor is formed in the semiconductor between the source and drain electrodes. More specific film layer structures can be set according to common thin-film transistor structures, and will not be elaborated here.

[0052] Furthermore, the first electrode can be the anode of the organic light-emitting diode (OLED) of the display panel 100, and the second electrode can be the cathode of the OLED. The organic emission layer is formed by multiple 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). When the organic emission layer includes all of the above layers, the hole injection layer (HIL) can be located on the first electrode, and the hole transport layer (HTL), emission layer, electron transport layer (ETL), and electron injection layer (EIL) can 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, namely the light-emitting unit 120 described above in this application. The encapsulation layer 130 covering the light-emitting unit 120 can be formed by alternately laminating one or more organic layers and one or more inorganic layers. Multiple inorganic or organic layers can be provided.

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

[0054] S1: After the process of 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 140a on the insulating layer 140 that exposes the encapsulation layer 130.

[0055] S2: Fill the first opening 140a with color filter material to form a color filter layer 150, and fill the gaps between the color filter layers 150 with a light-shielding layer.

[0056] In this step, it is important to note that the refractive index of the color filter layer 150 is greater than that of the insulating layer 140, the color filter layer 150 is only filled near the light-emitting unit 120 of the same color, and the height of the light-shielding 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 is important to note that the refractive index of the optical adhesive layer 160 is greater than that of the color filter layer 150, and the optical adhesive layer 160 also serves as a planarization layer.

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

[0060] In summary, although the present application has disclosed the preferred embodiments as described above, the above preferred embodiments are not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be determined by the scope defined in the claims.

Claims

1. A display panel, characterized in that, include: Array substrate; Multiple light-emitting units are spaced apart on the array substrate; An encapsulation layer is disposed on the side of the light-emitting unit away from the array substrate and covers the light-emitting unit; An insulating layer is disposed on the side of the encapsulation layer away from the array substrate. The insulating layer has a first opening, and the orthographic projection of the first opening on the array substrate overlaps with the orthographic projection of the light-emitting unit on the array substrate. A color filter layer is disposed on the 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 in contact with the insulating layer of the color filter layer includes a first interface, and some of the light emitted by the light-emitting unit is refracted at the first interface. The refractive index of the color filter layer is greater than that of the insulating layer.

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

3. The display panel according to claim 2, characterized in that, The surface in contact with the optical adhesive layer of the color filter layer also includes a third interface, on which some of the light emitted by the light-emitting unit undergoes total internal reflection.

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 4, characterized in that, The cross-sectional shape of the portion of the color filter layer extending beyond 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 claim 2, characterized in that, The refractive index of the color filter layer is less than that of the optical adhesive layer.

7. The display panel according to claim 1, characterized in that, From a top view of the display panel, the color filter layer is annular, and the light-emitting unit is circular and located at the center of the annular color filter layer.

8. The display panel according to claim 1, characterized in that, The display panel also includes: A light-shielding layer is disposed on the 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.

9. The display panel according to claim 8, characterized in that, The display panel further includes a touch metal layer, at least partially disposed in the insulating layer, wherein 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.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

Images