Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel comprises an array substrate; the organic light-emitting layer is arranged on the surface of the array substrate; the organic light-emitting layer comprises an anode layer, a light-emitting layer and a cathode layer which are stacked; the packaging layer is arranged on one side, far away from the array substrate, of the organic light-emitting layer; the polaroid is arranged on the side, away from the organic light-emitting layer, of the packaging layer; the polaroid has a first preset thickness and / or a first preset dielectric constant; wherein the first preset thickness is larger than the standard thickness, and the first preset dielectric constant is smaller than the standard dielectric constant; the standard thickness and the standard dielectric constant are the thickness and the dielectric constant of the standard polaroid. According to the embodiment of the utility model, the touch sensitivity of the display panel of the OLED notebook computer can be improved, and the possibility of hand ghost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display panel and display device. Background Technology

[0002] As the size of Organic Light-Emitting Diode (OLED) displays gradually increases, the demand for laptops with medium-sized OLED screens is growing. Therefore, the performance of OLED devices is crucial for laptops.

[0003] The core requirement for OLED laptop displays is to eliminate the need for an outer protective cover while still maintaining touch functionality. However, existing OLED laptop touch displays suffer from a relatively large Cd / Cs capacitance, resulting in a small capacitance difference between the finger area and the non-finger area compared to the Cd / Cs ratio. This makes OLED laptop displays prone to touch malfunctions, often resulting in "ghost hand" errors. Here, Cd represents the coupling capacitance between the finger and a trace extending in one direction during touch, while Cs represents the coupling capacitance between the finger and a trace extending in another direction. Utility Model Content

[0004] This invention provides a display panel and display device to solve the problem of touch malfunction and ghost hand issues that easily occur on OLED laptop screens.

[0005] According to one aspect of the present invention, a display panel is provided, comprising:

[0006] Array substrate;

[0007] An organic light-emitting layer is disposed on the surface of the array substrate; the organic light-emitting layer includes an anode layer, a light-emitting layer and a cathode layer stacked together.

[0008] An encapsulation layer is disposed on the side of the organic light-emitting layer away from the array substrate;

[0009] A polarizer is disposed on the side of the encapsulation layer away from the organic light-emitting layer; the polarizer has a first preset thickness and / or a first preset dielectric constant;

[0010] Wherein, the first preset thickness is greater than the standard thickness, and the first preset dielectric constant is less than the standard dielectric constant; the standard thickness and the standard dielectric constant are the thickness and dielectric constant of the standard polarizer.

[0011] Optionally, the range of the first preset thickness includes greater than or equal to 226 μm, and the range of the first preset dielectric constant includes 2.5 to 3.

[0012] Optionally, the polarizer is a circular polarizer.

[0013] Optionally, the polarizer includes a pressure-sensitive adhesive layer, a phase difference film layer, a first cellulose triacetate layer, a polyvinyl alcohol film layer, and a second cellulose triacetate layer stacked together.

[0014] Optionally, the pressure-sensitive adhesive layer has a first thickness, the phase difference film layer has a second thickness, both the first triacetate cellulose layer and the second triacetate cellulose layer have a third thickness, and the polyvinyl alcohol film layer has a fourth thickness.

[0015] The first thickness ranges from 15 to 25 μm, the second thickness ranges from 6 to 20 μm, the third thickness ranges from 80 to 100 μm, and the fourth thickness ranges from 12 to 30 μm.

[0016] Optionally, the display panel may also include a touch control layer;

[0017] The touch control layer is disposed on the side of the polarizer away from the encapsulation layer, and the touch control layer is used to adjust the capacitive voltage difference generated by touch.

[0018] Optionally, the touch control layer is a transparent film layer.

[0019] Optionally, the touch control layer includes a 3A optical film, the 3A optical film having a second preset thickness and a second preset dielectric constant.

[0020] Optionally, the range of the second preset thickness includes greater than or equal to 125 μm, and the range of the second preset dielectric constant includes less than or equal to 3.

[0021] According to another aspect of the present invention, a display device is provided, comprising a display panel as described in any embodiment of the first aspect.

[0022] The display panel provided in this embodiment of the invention features a polarizer on the side of the encapsulation layer away from the organic light-emitting layer. The polarizer has a first preset thickness greater than the standard thickness of a standard polarizer to increase the inter-plate distance of the parallel-plate capacitor formed between the finger and the display panel. Alternatively, the polarizer has a first preset dielectric constant less than the standard dielectric constant of a standard polarizer to decrease the dielectric constant of the parallel-plate capacitor. Both of these methods reduce the coupling capacitance Cd / Cs generated between the finger and the traces in the display panel during touch, increasing the difference between the capacitance difference ΔC between the area touched by the finger and the non-finger area and the coupling capacitance Cd / Cs. This improves the touch sensitivity of the OLED laptop display panel and reduces the possibility of ghosting.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a display panel according to an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the structure of a display panel provided by related technologies;

[0027] Figure 3 This is a schematic diagram of the structure of a polarizer in a display panel according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the structure of another display panel according to an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of a display device provided according to an embodiment of the present utility model. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] This utility model embodiment provides a display panel. Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present utility model. Figure 1 As shown, the display panel includes: an array substrate 10, an organic light-emitting layer 20, an encapsulation layer 30, and a polarizer 40.

[0033] An organic light-emitting layer 20 is disposed on the surface of the array substrate 10; the organic light-emitting layer 20 includes an anode layer, a light-emitting layer, and a cathode layer stacked together. Figure 1 Not shown in the diagram; the encapsulation layer 30 is disposed on the side of the organic light-emitting layer 20 away from the array substrate 10; the polarizer 40 is disposed on the side of the encapsulation layer 30 away from the organic light-emitting layer 20; the polarizer 40 has a first preset thickness and / or a first preset dielectric constant; wherein, the first preset thickness is greater than the standard thickness, and the first preset dielectric constant is less than the standard dielectric constant; the standard thickness and standard dielectric constant are the thickness and dielectric constant of a standard polarizer.

[0034] Specifically, the array substrate 10 may include a thin-film transistor (TFT) circuit fabricated using low-temperature poly-silicon (LTPS) technology, used to control the voltage between the anode and cathode layers in the organic light-emitting layer 20, thereby controlling the light-emitting layer to emit light or extinguish. The encapsulation layer 30 may include an encapsulation cover plate, i.e., a FIT encapsulation cover plate, which is commonly used in OLED display panels for glass adhesive encapsulation. A polarizer 40 is disposed on the surface of the encapsulation layer 30.

[0035] Regarding the conventional notebook computer display panel structure provided in related technologies Figure 2 A schematic diagram of a display panel structure provided for related technologies. For example... Figure 2As shown, it does not have an outermost protective cover plate and also includes a stacked array substrate 01, an organic light-emitting layer 02, an encapsulation layer 03, and a polarizer 04. In the display panel provided by the related technology, a standard polarizer is used on the surface of the encapsulation layer 03. The standard polarizer, i.e., a conventional polarizer, has a standard thickness and a standard dielectric constant. For example, the standard thickness can be 102 μm, and the standard dielectric constant can be 3.25. When the display panel provided by the related technology is touched, the coupling capacitance Cd / Cs generated between the finger and the traces in different directions is large. This makes the capacitance difference ΔC between the area touched by the finger and the non-finger area too small compared with the coupling capacitance Cd / Cs. Therefore, the accuracy of determining the touch position is low, and touch failure and ghost hand situations are prone to occur.

[0036] Based on this, the difference between the capacitance difference ΔC and the capacitance can be increased by reducing the coupling capacitance between the finger and the trace during touch, thus improving the sensitivity of touch control by accurately distinguishing between the finger-touched area and the non-finger area. As for the parallel plate capacitor, its capacitance can be calculated using formula (1). Formula (1) can be expressed as follows:

[0037]

[0038] Where ε represents the dielectric constant of the parallel plate capacitor; ε0 represents the relative dielectric constant; S represents the area of ​​the parallel plate capacitor facing each other; k represents the electrostatic constant; and d represents the distance between the parallel plates.

[0039] When touching an OLED display panel with a finger, the facing area is equal to the area of ​​the finger and the corresponding area on the display panel; therefore, the facing area remains constant. Based on this, to reduce the coupling capacitance Cd / Cs generated between the finger and the traces in the display panel during touch, this can be achieved by increasing the distance d between the parallel plates and / or decreasing the dielectric constant ε of the parallel plate capacitors.

[0040] In this embodiment of the invention, the display panel may employ a thicker polarizer 40, i.e., a first preset thickness greater than the standard thickness of a standard polarizer, to increase the inter-plate distance of the parallel plate capacitor formed between the finger and the display panel. This reduces the coupling capacitance Cd / Cs generated by the finger and the traces in the display panel during touch, and increases the difference between the capacitance difference ΔC and the coupling capacitance Cd / Cs between the area touched by the finger and the non-finger area. Alternatively, the display panel may employ a polarizer 40 with a smaller dielectric constant, i.e., a first preset dielectric constant less than the standard dielectric constant of a standard polarizer, to reduce the dielectric constant of the parallel plate capacitor. This further reduces the coupling capacitance Cd / Cs generated by the finger and the traces in the display panel during touch, and increases the difference between the capacitance difference ΔC and the coupling capacitance Cd / Cs between the area touched by the finger and the non-finger area. Display panels prepared using polarizers 40 with one or both of the above features can effectively improve the touch sensitivity of OLED laptop display panels and reduce the possibility of ghosting.

[0041] The display panel provided in this embodiment of the invention features a polarizer on the side of the encapsulation layer away from the organic light-emitting layer. The polarizer has a first preset thickness greater than the standard thickness of a standard polarizer to increase the inter-plate distance of the parallel-plate capacitor formed between the finger and the display panel. Alternatively, the polarizer has a first preset dielectric constant less than the standard dielectric constant of a standard polarizer to decrease the dielectric constant of the parallel-plate capacitor. Both of these methods reduce the coupling capacitance Cd / Cs generated between the finger and the traces in the display panel during touch, increasing the difference between the capacitance difference ΔC between the area touched by the finger and the non-finger area and the coupling capacitance Cd / Cs. This improves the touch sensitivity of the OLED laptop display panel and reduces the possibility of ghosting.

[0042] Optionally, based on the above embodiments, the range of the first preset thickness includes greater than or equal to 226 μm, and the range of the first preset dielectric constant includes 2.5 to 3.

[0043] For example, for a 14.5-inch laptop OLED display, a polarizer 40 with a first preset thickness of 226μm and a first preset dielectric constant of 2.94 will be used, as well as a standard polarizer with a standard thickness of 102μm and a standard dielectric constant of 3.256 will be used to test the touch performance. The test results can be presented in Table 1.

[0044] Table 1 Touch Performance Test Table

[0045]

[0046] The mutual capacitance value Cm represents the coupling capacitance generated at the intersection of the finger and the traces in different directions during touch.

[0047] As can be seen from Table 1, compared with the standard polarizer, the OLED display panel with the polarizer 40 with increased thickness and decreased dielectric constant meets the performance test requirements and has significantly better touch performance than conventional laptop OLED displays.

[0048] Optionally, Figure 3 This is a schematic diagram of the structure of a polarizer in a display panel according to an embodiment of the present invention. Based on the above embodiments, as follows... Figure 3 As shown, the polarizer 40 includes a pressure-sensitive adhesive layer 41, a phase difference film layer 42, a first cellulose triacetate layer 43, a polyvinyl alcohol film layer 44, and a second cellulose triacetate layer 45, which are stacked together.

[0049] The pressure-sensitive adhesive layer 41 has a first thickness, the phase difference film layer 42 has a second thickness, the first cellulose triacetate layer 43 and the second cellulose triacetate layer 45 both have a third thickness, and the polyvinyl alcohol film layer 44 has a fourth thickness; the first thickness ranges from 15 to 25 μm, the second thickness ranges from 6 to 20 μm, the third thickness ranges from 80 to 100 μm, and the fourth thickness ranges from 12 to 30 μm.

[0050] For example, in an OLED display panel, the polarizer 40 is a circular polarizer. The thickness of each layer in the polarizer 40 is set within a corresponding thickness range to ensure that the overall thickness of the polarizer 40 is greater than or equal to 226 μm, thereby improving the touch sensitivity of the display panel.

[0051] Optionally, Figure 4 This is a schematic diagram of another display panel provided in an embodiment of the present utility model. Based on the above embodiments, as follows... Figure 4 As shown, the display panel also includes a touch control layer 50.

[0052] The touch control layer 50 is disposed on the side of the polarizer 40 away from the encapsulation layer 30, and the touch control layer 50 is used to adjust the capacitive voltage difference generated by touch.

[0053] Specifically, by adding a touch control layer 50 to the surface of the polarizer 40, the capacitance difference ΔC between the area touched by the finger and the non-finger area can be further controlled, increasing the difference between the capacitance difference ΔC and the coupling capacitance Cd / Cs, thereby improving the touch sensitivity of the OLED display panel. For example, the touch control layer 50 is a transparent film layer. By using a transparent material to form the touch control layer 50, the touch sensitivity of the display panel can be improved without affecting the display effect.

[0054] Optionally, based on the above embodiments, the touch control layer 50 includes a 3A optical film, the 3A optical film having a second preset thickness and a second preset dielectric constant.

[0055] Specifically, the touch control layer 50 can be made of polyethylene terephthalate (PET) 3A optical film. A 3A optical film is a thin film with three main characteristics, which may include anti-glare (AG), anti-reflective (AR), and anti-fingerprint (AF) properties. By setting a 3A optical film on the surface of the polarizer 40, specular reflection can be reduced, achieving anti-glare by diffusing reflected light; it also achieves anti-reflection and anti-reflection, making the screen display brighter and the picture more vivid; using a highly hydrophobic material can also reduce fingerprint residue and make the touch smooth. For example, the second preset thickness ranges from greater than or equal to 125 μm, and the second preset dielectric constant includes less than or equal to 3. By increasing the second preset thickness of the 3A optical film and / or decreasing the second preset dielectric constant of the 3A optical film, the distance between the plates of the parallel plate capacitor formed between the finger and the display panel can be further increased; and / or the dielectric constant of the parallel plate capacitor can be decreased, thereby further improving the touch sensitivity of the OLED laptop display panel and reducing the possibility of ghost hands.

[0056] This utility model embodiment also provides a display device. Figure 5 This is a schematic diagram of a display device provided in an embodiment of the present utility model. Figure 5 As shown, the display device can be a laptop computer or similar device whose screen does not have an outermost protective cover. The display device includes the display panel provided in any embodiment of this utility model, and its technical principles and effects are similar, so they will not be described in detail here.

[0057] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A display panel, characterized in that, include: Array substrate; An organic light-emitting layer is disposed on the surface of the array substrate; the organic light-emitting layer includes an anode layer, a light-emitting layer and a cathode layer stacked together. An encapsulation layer is disposed on the side of the organic light-emitting layer away from the array substrate; A polarizer is disposed on the side of the encapsulation layer away from the organic light-emitting layer; the polarizer has a first preset thickness and / or a first preset dielectric constant; Wherein, the first preset thickness is greater than the standard thickness, and the first preset dielectric constant is less than the standard dielectric constant; the standard thickness and the standard dielectric constant are the thickness and dielectric constant of the standard polarizer.

2. The display panel according to claim 1, characterized in that, The first preset thickness ranges from 226 μm to greater than or equal to 226 μm, and the first preset dielectric constant ranges from 2.5 to 3.

3. The display panel according to claim 1, characterized in that, The polarizer is a circular polarizer.

4. The display panel according to claim 3, characterized in that, The polarizer comprises a pressure-sensitive adhesive layer, a phase difference film layer, a first cellulose triacetate layer, a polyvinyl alcohol film layer, and a second cellulose triacetate layer, all stacked together.

5. The display panel according to claim 4, characterized in that, The pressure-sensitive adhesive layer has a first thickness, the phase difference film layer has a second thickness, both the first triacetate cellulose layer and the second triacetate cellulose layer have a third thickness, and the polyvinyl alcohol film layer has a fourth thickness. The first thickness ranges from 15 to 25 μm, the second thickness ranges from 6 to 20 μm, the third thickness ranges from 80 to 100 μm, and the fourth thickness ranges from 12 to 30 μm.

6. The display panel according to claim 1, characterized in that, Also includes: Touch control layer; The touch control layer is disposed on the side of the polarizer away from the encapsulation layer, and the touch control layer is used to adjust the capacitive voltage difference generated by touch.

7. The display panel according to claim 6, characterized in that, The touch control layer is a transparent film layer.

8. The display panel according to claim 6, characterized in that, The touch control layer includes a 3A optical film, which has a second preset thickness and a second preset dielectric constant.

9. The display panel according to claim 8, characterized in that, The second preset thickness ranges from 125 μm to 125 μm, and the second preset dielectric constant ranges from 3 to 3.

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

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