Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel includes: a substrate; the pixel definition layer is located on one side of the substrate, and the pixel definition layer comprises pixel definition structures and opening areas between the pixel definition structures; the light absorption layer is located on the side, away from the substrate, of the pixel definition layer, and the light absorption layer avoids the opening area. The display panel can prevent external light rays from being reflected when the external light rays are emitted to the display panel, meanwhile, the light rays in the opening area are not influenced to be emitted to the outside, the problem that in the prior art, the strong light resisting effect of the display panel is poor can be solved, reflection of the display panel to the external light is reduced through the light absorption layer, and therefore the contrast ratio of the display panel is improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Currently, organic light emitting diode (OLED) display panels have been widely used due to their excellent properties such as high brightness, high efficiency, wide viewing angle, and autonomous luminescence.

[0003] Since the front screen of the display has a reflective layer or device structure that can reflect ambient light, there is strong reflected light on the surface of the front screen of the display under strong light conditions (such as outdoor sunlight), which causes the display to be whitish, blurred, and the contrast ratio to decrease, seriously affecting the reading and recognition of normal display content and reducing the display quality of the display. In the prior art, circular polarization is often used to eliminate the strong ambient light reflection of the metal electrode in the OLED display panel and improve the contrast. However, with the rapid development of flexible displays, thick and brittle polarizers will be unfavorable for flexible displays, and the anti-glare effect is poor, and the effect of improving the contrast of the display panel is not obvious. Utility Model Content

[0004] The utility model provides a display panel and a display device, so as to reduce the reflection of external light and improve the contrast of the display panel.

[0005] In a first aspect, an embodiment of the utility model provides a display panel, comprising:

[0006] substrate;

[0007] A pixel definition layer, located on one side of the substrate, the pixel definition layer comprising a pixel definition structure and an opening area between the pixel definition structures;

[0008] The light absorbing layer is located on a side of the pixel definition layer away from the substrate, and the light absorbing layer avoids the opening area.

[0009] Furthermore, the display panel further includes:

[0010] A support column, disposed on a side of a portion of the pixel definition structure away from the substrate;

[0011] The cathode layer is located on a side of the pixel definition layer away from the substrate, and the cathode layer covers the pixel definition layer, the light absorption layer and the support column.

[0012] Optionally, the light absorbing layer is located between the cathode layer and the supporting pillars, and the light absorbing layer covers the supporting pillars and a side of the pixel defining structure away from the substrate.

[0013] Optionally, the light absorbing layer is located between the pixel definition layer and the supporting pillars, and the light absorbing layer covers a side of the pixel definition structure away from the substrate.

[0014] Optionally, the display panel includes:

[0015] A support column, disposed on a side of a portion of the pixel definition structure away from the substrate;

[0016] A cathode layer, located on a side of the pixel definition layer away from the substrate, and the cathode layer covers the pixel definition layer and the support column;

[0017] An encapsulation layer, located on a side of the cathode layer away from the substrate, and the encapsulation layer covers the cathode layer;

[0018] The light absorbing layer is located in the packaging layer, and a projection of the light absorbing layer on the substrate avoids a projection of the opening area on the substrate.

[0019] Optionally, the encapsulation layer further includes:

[0020] A first packaging layer is located on a side of the cathode layer away from the substrate, and the first packaging layer covers the cathode layer;

[0021] A second encapsulation layer is located on a side of the first encapsulation layer away from the substrate, and the second encapsulation layer covers the first encapsulation layer;

[0022] a third encapsulation layer, located on a side of the second encapsulation layer away from the substrate, and the third encapsulation layer covers the second encapsulation layer;

[0023] The light absorbing layer is located between the first encapsulation layer and the second encapsulation layer or between the second encapsulation layer and the third encapsulation layer, and a projection of the light absorbing layer on the substrate does not cover a projection of the opening area on the substrate.

[0024] Optionally, the first encapsulation layer and the third encapsulation layer are inorganic layers, and the second encapsulation layer is an organic layer.

[0025] Optionally, also include:

[0026] A support column, disposed on a side of a portion of the pixel definition structure away from the substrate;

[0027] A cathode layer, located on a side of the pixel definition layer away from the substrate, and the cathode layer covers the pixel definition layer and the support column;

[0028] An encapsulation layer, located on a side of the cathode layer away from the substrate, and the encapsulation layer covers the cathode layer;

[0029] The light absorbing layer is located on a side of a portion of the packaging layer away from the substrate, and a projection of the light absorbing layer on the substrate does not cover a projection of the opening area on the substrate.

[0030] Optionally, the material of the light absorbing layer is amorphous silicon; and the thickness of the light absorbing layer is 10-30 nm.

[0031] In a second aspect, an embodiment of the present utility model further provides a display device, comprising the display panel in any embodiment of the present utility model.

[0032] The utility model provides a display panel and a display device, wherein the display panel comprises: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer comprising a pixel definition structure and an opening area between the pixel definition structures; a light absorption layer located on a side of the pixel definition layer away from the substrate, and the light absorption layer avoids the opening area, when external light is directed to the display panel, the light absorption layer can absorb the external light to prevent the external light from being reflected when directed to the display panel, and at the same time does not affect the light in the opening area from being directed to the outside. The utility model can solve the problem of poor anti-glare effect of the display panel in the prior art, and reduce the reflection of the display panel to the external light through the light absorption layer, thereby improving the contrast of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of the utility model.

[0034] Figure 2 A schematic diagram of the structure of another display panel provided in an embodiment of the utility model.

[0035] Figure 3 A schematic diagram of the structure of another display panel provided in an embodiment of the utility model.

[0036] Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the utility model.

[0037] Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the utility model is shown in FIG. Figure 1 As shown, the display panel includes: a substrate 101; a pixel definition layer located on one side of the substrate 101, the pixel definition layer including a pixel definition structure 1021 and an opening area 1022 between the pixel definition structure 1021; a light absorption layer 103 located on a side of the pixel definition layer away from the substrate 101, and the light absorption layer 103 avoids the opening area 1022.

[0040] The light absorbing layer 103 is located on the side of the pixel definition layer away from the substrate 101, for example, Figure 1 As shown, the light absorbing layer 103 can be disposed between the cathode layer 104 and the pixel definition layer. In addition, the light absorbing layer 103 can also be disposed above the cathode layer 104. In addition, an anode layer 106 is disposed between the substrate 101 and the pixel definition layer. The anode layer 106 is at least partially located in the opening area 1022, that is, the opening area 1022 exposes at least part of the anode layer 106. A light emitting layer 107 is also disposed in the opening area 1022. The light emitting layer 107 is in contact with the anode layer 106. The light emitting layer 107 can emit light from the opening area 1022.

[0041] Specifically, the light absorbing layer 103 is located on a side of the pixel definition layer away from the substrate 101, and the light absorbing layer 103 avoids the opening area 1022, so that the light emitted by the light emitting layer 107 will not be absorbed by the light absorbing layer 103 when it is emitted from the opening. In addition, the light absorbing layer 103 can be made of a light absorbing material, and the light absorbing layer 103 can have a good absorption rate for visible light. When external light is emitted to the display panel, the light absorbing layer 103 can absorb the external light to prevent the external light from being reflected when it is emitted to the display panel, thereby improving the brightness and contrast of the light emitted by the light emitting layer 107 to the outside, thereby achieving the effect of improving the contrast of the display panel, and can solve the problem of poor anti-glare effect of the display panel in the prior art.

[0042] In addition, a planarization layer, a driving layer, and a buffer layer stacked from top to bottom may be included between the substrate 101 and the pixel definition layer; the buffer layer is formed on the surface of the substrate 101, and the driving layer is formed on the surface of the buffer layer, and may include multiple thin film transistors, and the thin film transistor at least includes a gate, a gate insulating layer, an active layer, and a source / drain layer. The gate insulating layer is formed under the gate layer, and the active layer is formed under the gate insulating layer, and the active layer is insulated from the gate layer. Source / drain layers are arranged on both sides of the active layer, and the source / drain layer includes a source and a drain, and the source and the drain are electrically connected to the corresponding positions of the active layer respectively; the planarization layer is formed above the driving layer, and an anode layer 106 is arranged on the planarization layer, and the anode layer 106 is electrically contacted with the drain or source in the thin film transistor, and the voltage and current of the anode layer 106 are controlled by the thin film transistor.

[0043] The embodiment of the utility model provides a display panel, including a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer including a pixel definition structure and an opening area between the pixel definition structures; a light absorption layer located on the side of the pixel definition layer away from the substrate, and the light absorption layer avoids the opening area. When external light is emitted to the display panel, the light absorption layer can absorb the external light to prevent the external light from being reflected when it is emitted to the display panel, and at the same time, it does not affect the light in the opening area from being emitted to the outside. The embodiment of the utility model can solve the problem of poor anti-glare effect of the display panel in the prior art, and reduce the reflection of the display panel to the external light through the light absorption layer, thereby improving the contrast of the display panel.

[0044] The embodiment of the utility model further provides another display panel, Figure 2 A schematic diagram of another display panel provided by an embodiment of the present utility model is shown in FIG. Figure 2 As shown, the display panel includes a substrate 101 , a pixel definition layer and a light absorption layer 103 ; the pixel definition layer includes a pixel definition structure 1021 and an opening area 1022 between the pixel definition structures 1021 .

[0045] Further, such as Figure 2 As shown, the display panel also includes: a support column 105, which is arranged on the side of the partial pixel definition structure 1021 away from the substrate 101; a cathode layer 104, which is located on the side of the pixel definition layer away from the substrate 101, and the cathode layer 104 covers the pixel definition layer, the light absorption layer 103 and the support column 105.

[0046] The support column 105 may be located on a side of the pixel definition structure 1021 away from the substrate 101. The support column 105 may be used to support the mask when the light-emitting layer 107 is evaporated to prevent the panel from being scratched when the light-emitting layer 107 is evaporated. The light absorption layer 103 is located between the pixel definition layer and the support column 105. The light absorption layer 103 may absorb external light to prevent external light from being reflected when it is emitted to the display panel, thereby improving the brightness and contrast of the light emitted by the light-emitting layer 107 to the outside world, thereby achieving the effect of improving the contrast of the display panel.

[0047] Optional, Figure 3 A schematic diagram of another display panel provided by an embodiment of the present utility model is shown in FIG. Figure 3 As shown, the light absorbing layer 103 is located between the cathode layer 104 and the supporting pillars 105 , and the light absorbing layer 103 covers the supporting pillars 105 and a side of the pixel definition structure 1021 away from the substrate 101 .

[0048] Specifically, the light absorbing layer 103 can be made after the pixel definition layer is formed and before the light emitting layer 107 is evaporated, so the light absorbing layer 103 can be covered by the common layer in the display panel. For example, the common layer includes the electron transport layer, the electron injection layer, the hole transport layer and the hole injection layer. The light absorbing layer 103 can absorb external light and prevent the external light from being reflected when it is projected to the display panel, thereby improving the brightness and contrast of the light projected by the light emitting layer 107 to the outside world.

[0049] Optional, continue to refer to Figure 2 The light absorbing layer 103 is located between the pixel definition layer and the support pillar 105 , and the light absorbing layer 103 covers a side of the pixel definition structure 1021 away from the substrate 101 .

[0050] Specifically, the light absorbing layer 103 can be made before the support column 105 is prepared, so the light absorbing layer 103 can be covered by the common layer in the display panel, and the common layer can include film layers such as an electron transport layer, an electron injection layer, a hole transport layer, and a hole injection layer. The light absorbing layer 103 can absorb external light and prevent the external light from being reflected when it is emitted to the display panel, thereby improving the brightness and contrast of the light emitted by the light emitting layer 107 to the outside world.

[0051] The embodiment of the utility model further provides another display panel, Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the utility model is shown as follows: Figure 4 As shown, the display panel also includes: a support column 105, which is arranged on a side of a portion of the pixel definition structure 1021 away from the substrate 101; a cathode layer 104, which is located on a side of the pixel definition layer away from the substrate 101, and the cathode layer 104 covers the pixel definition layer and the support column 105; an encapsulation layer 108, which is located on a side of the cathode layer 108 away from the substrate 101, and the encapsulation layer 108 covers the cathode layer 104; the light absorption layer 103 is located in the encapsulation layer 108, and the projection of the light absorption layer 103 on the substrate 101 avoids the projection of the opening area 1022 on the substrate 101.

[0052] The encapsulation layer 108, as an encapsulation film layer of the display panel, may include multiple film layers to improve the encapsulation performance of the display panel and prevent moisture intrusion. The light absorbing layer 103 is located in the encapsulation layer 108, and the projection of the light absorbing layer 103 on the substrate 101 avoids the projection of the opening area 1022 on the substrate 101, so that the light absorbing layer 103 is not covered above the opening area 1022, thereby ensuring that the light absorbing layer 103 does not affect the light emitted to the outside by the light emitting layer 107 in the opening area 1022, so that the light emitted to the outside by the light emitting layer 107 will not be absorbed by the light absorbing layer 103, so that the light absorbing layer 103 only absorbs visible light from the outside, thereby improving the contrast of the display panel.

[0053] Optional, such as Figure 4As shown, the encapsulation layer 108 also includes: a first encapsulation layer 1081, which is located on the side of the cathode layer 104 away from the substrate 101, and the first encapsulation layer 1081 covers the cathode layer 104; a second encapsulation layer 1082, which is located on the side of the first encapsulation layer 1081 away from the substrate 101, and the second encapsulation layer 1082 covers the first encapsulation layer 1081; a third encapsulation layer 1083, which is located on the side of the second encapsulation layer 1082 away from the substrate 101, and the third encapsulation layer 1083 covers the second encapsulation layer 1082; the light absorption layer 103 is located between the first encapsulation layer 1081 and the second encapsulation layer 1082 or between the second encapsulation layer 1082 and the third encapsulation layer 1083, and the projection of the light absorption layer 103 on the substrate 101 does not cover the projection of the opening area 1022 on the substrate 101.

[0054] As shown in Reference 4, the light absorbing layer 103 may be located between the first encapsulation layer 1081 and the second encapsulation layer 1082, or between the second encapsulation layer 1082 and the third encapsulation layer 1083, and the projection of the light absorbing layer 103 on the substrate 101 does not cover the projection of the opening area 1022 on the substrate 101, that is, the light absorbing layer 103 is not covered above the opening area 1022, thereby ensuring that the light absorbing layer 103 will not affect the light emitted by the light emitting layer 107 in the opening area 1022 and will not be absorbed by the light absorbing layer 103.

[0055] Specifically, the light absorbing layer 103 is located between the first encapsulation layer 1081 and the second encapsulation layer 1082 or between the second encapsulation layer 1082 and the third encapsulation layer 1083, that is, the light absorbing layer 103 is located in the encapsulation layer 108. The light absorbing layer 103 can absorb external light and prevent the external light from being reflected when it is emitted to the display panel, thereby improving the brightness and contrast of the light emitted by the light-emitting layer 107 to the outside world, thereby achieving the effect of improving the contrast of the display panel.

[0056] Optionally, the first encapsulation layer 1081 and the third encapsulation layer 1083 are inorganic layers, and the second encapsulation layer 1082 is an organic layer.

[0057] The first encapsulation layer 1081 and the third encapsulation layer 1083 are inorganic layers, and the materials may be SiNx, SiOx, etc. The second encapsulation layer is an organic layer, and the materials may be acrylic, epoxy resin or silicone resin.

[0058] Optionally, in another embodiment of the present invention, the light absorbing layer 103 is located on a side of the partial encapsulation layer 108 away from the substrate 101 , and the projection of the light absorbing layer 103 on the substrate 101 does not cover the projection of the opening area 1022 on the substrate 101 .

[0059] Optionally, the material of the light absorbing layer 103 is amorphous silicon.

[0060] Among them, amorphous silicon material has a good absorption rate for visible light. When amorphous silicon is used as the material of the light absorption layer 103, it can effectively absorb external light and prevent external light from being reflected when it is projected onto the display panel, thereby improving the contrast of the display panel. In addition, amorphous silicon has the characteristics of diversified film forming process, stable performance, good uniformity, etc., which is convenient for forming the light absorption layer 103 in the film layer above the pixel definition layer to absorb external light.

[0061] Optionally, the thickness of the light absorbing layer 103 is 10-30 nm.

[0062] Among them, preferably, the thickness of the light absorbing layer 103 is 20nm. When the thickness of the light absorbing layer 103 is 20nm, it has a good absorption rate for visible light. Setting the thickness of the light absorbing layer 103 to 20nm can effectively absorb external light and prevent external light from being reflected when it is projected onto the display panel, thereby improving the contrast of the display panel.

[0063] Optional, Figure 5 A schematic diagram of the structure of another display panel provided by an embodiment of the utility model is shown as follows: Figure 5 As shown, a planarization layer 111, a protective layer 112, a second interlayer insulating layer 113, a first interlayer insulating layer 114, a gate insulating layer 115 and a buffer layer 109 are stacked from top to bottom between the pixel definition layer and the substrate 101. The thin film transistor 110 also includes a source electrode 1101, a source region 1102, a channel region 1103, a gate 1104, a drain region 1105, and a drain electrode 1106. In addition, a capacitor second electrode 117 is included between the second interlayer insulating layer 113 and the first interlayer insulating layer 114, and a capacitor first electrode 116 is included between the gate insulating layer 115 and the first interlayer insulating layer 114. The anode layer 106 is connected to the driving layer through a via, and the anode layer 106 is also in contact with the light-emitting layer 107, so that the driving layer can control the light-emitting layer 107 to emit light by controlling the voltage of the anode layer 106.

[0064] The embodiment of the utility model provides a display panel, wherein the light absorption layer is located on the side of the pixel definition layer away from the substrate, and the light absorption layer avoids the opening area. When external light is directed to the display panel, the light absorption layer can absorb the external light to prevent the external light from being reflected when directed to the display panel, while not affecting the light in the opening area from being directed to the outside. The embodiment of the utility model can solve the problem of poor anti-glare effect of the display panel in the prior art, and reduce the reflection of the display panel to the external light through the light absorption layer, thereby improving the contrast of the display panel.

[0065] An embodiment of the utility model further provides a display device, comprising the display panel described in any of the above embodiments.

[0066] Specifically, the display device provided by the embodiment of the utility model includes the display panel proposed in any of the above embodiments, and has the beneficial effects of the display panel proposed in the above embodiments, which will not be repeated here. Exemplarily, the display device can be a mobile phone, a wearable device with a display function, a computer, and other display devices.

[0067] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; A pixel definition layer, located on one side of the substrate, the pixel definition layer comprising a pixel definition structure and an opening area between the pixel definition structures; The light absorbing layer is located on a side of the pixel definition layer away from the substrate, and the light absorbing layer avoids the opening area.

2. The display panel according to claim 1, characterized in that: Also includes: A support column, disposed on a side of a portion of the pixel definition structure away from the substrate; The cathode layer is located on a side of the pixel definition layer away from the substrate, and the cathode layer covers the pixel definition layer, the light absorption layer and the support column.

3. The display panel according to claim 2, characterized in that: The light absorbing layer is located between the cathode layer and the supporting pillars, and the light absorbing layer covers the supporting pillars and a side of the pixel definition structure away from the substrate.

4. The display panel according to claim 2, characterized in that: The light absorbing layer is located between the pixel definition layer and the supporting pillars, and the light absorbing layer covers a side of the pixel definition structure away from the substrate.

5. The display panel according to claim 1, characterized in that: Also includes: A support column, disposed on a side of a portion of the pixel definition structure away from the substrate; A cathode layer, located on a side of the pixel definition layer away from the substrate, and the cathode layer covers the pixel definition layer and the support column; An encapsulation layer, located on a side of the cathode layer away from the substrate, and the encapsulation layer covers the cathode layer; The light absorbing layer is located in the packaging layer, and a projection of the light absorbing layer on the substrate avoids a projection of the opening area on the substrate.

6. The display panel according to claim 5, characterized in that: The encapsulation layer further comprises: A first packaging layer is located on a side of the cathode layer away from the substrate, and the first packaging layer covers the cathode layer; A second encapsulation layer is located on a side of the first encapsulation layer away from the substrate, and the second encapsulation layer covers the first encapsulation layer; a third encapsulation layer, located on a side of the second encapsulation layer away from the substrate, and the third encapsulation layer covers the second encapsulation layer; The light absorbing layer is located between the first encapsulation layer and the second encapsulation layer or between the second encapsulation layer and the third encapsulation layer, and a projection of the light absorbing layer on the substrate does not cover a projection of the opening area on the substrate.

7. The display panel according to claim 6, characterized in that: The first encapsulation layer and the third encapsulation layer are inorganic layers, and the second encapsulation layer is an organic layer.

8. The display panel according to claim 1, characterized in that: Also includes: A support column, disposed on a side of a portion of the pixel definition structure away from the substrate; A cathode layer, located on a side of the pixel definition layer away from the substrate, and the cathode layer covers the pixel definition layer and the support column; An encapsulation layer, located on a side of the cathode layer away from the substrate, and the encapsulation layer covers the cathode layer; The light absorbing layer is located on a side of a portion of the packaging layer away from the substrate, and a projection of the light absorbing layer on the substrate does not cover a projection of the opening area on the substrate.

9. The display panel according to any one of claims 1 to 8, characterized in that: The material of the light absorbing layer is amorphous silicon; the thickness of the light absorbing layer is 10-30nm.

10. A display device, characterized in that: Comprising a display panel as claimed in any one of claims 1 to 9.

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