Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate, a plurality of light-emitting devices and a plurality of first electromagnetic induction coils. The plurality of light-emitting devices are positioned on one side of the substrate; the multiple first electromagnetic induction coils are located on the side, close to the substrate, of the light-emitting device, and the orthographic projection of the first electromagnetic induction coils on the substrate does not overlap the orthographic projection of the light-emitting device on the substrate. According to the technical scheme, the use performance of the display panel and the display device is improved.

Description

Technical Field

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

[0002] With the development of display technology, touch-enabled display devices are being used more and more widely.

[0003] However, existing touch-enabled display devices occupy a large space and are quite thick, which is not conducive to the design of thinner and lighter display devices, resulting in poor performance. Summary of the Invention

[0004] The present invention provides a display panel and a display device to improve the performance of the display device.

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

[0006] substrate;

[0007] Multiple light-emitting devices are located on one side of the substrate;

[0008] A plurality of first electromagnetic induction coils are located on the side of the light-emitting device closer to the substrate, and the orthographic projection of the first electromagnetic induction coils on the substrate does not overlap with the orthographic projection of the light-emitting device on the substrate.

[0009] Optionally, the display panel may also include:

[0010] A plurality of second electromagnetic induction coils are located on the side of the first electromagnetic induction coil away from the substrate, and the orthographic projection of the first electromagnetic induction coil on the substrate coincides with the orthographic projection of the second electromagnetic induction coil on the substrate.

[0011] Preferably, the second electromagnetic induction coil is disposed on the same layer as the light-emitting device;

[0012] Preferably, each of the second electromagnetic induction coils is connected in series or in parallel with the corresponding first electromagnetic induction coil;

[0013] Alternatively, a plurality of second electromagnetic induction coils arranged along the first direction are connected in parallel to form a first group of electromagnetic induction coils, and a plurality of first electromagnetic induction coils arranged along the first direction are connected in parallel to form a second group of electromagnetic induction coils, wherein the first group of electromagnetic induction coils and the corresponding second group of electromagnetic induction coils are connected in series or in parallel.

[0014] A plurality of second electromagnetic induction coils arranged along the second direction are connected in parallel to form a third group of electromagnetic induction coils, and a plurality of first electromagnetic induction coils arranged along the second direction are connected in parallel to form a fourth group of electromagnetic induction coils. The third group of electromagnetic induction coils is connected in series or in parallel with the corresponding fourth group of electromagnetic induction coils; wherein, the first direction and the second direction intersect.

[0015] Optionally, the display panel may also include:

[0016] The first electrode and the second electrode are connected to the first electrode and the second electrode of the light-emitting device, respectively, and the first electrode and the second electrode are located on the side of the light-emitting device closer to the substrate.

[0017] Preferably, the first electrode and the second electrode are insulated from each other in the same layer;

[0018] Preferably, the display panel further includes a pixel circuit and a first insulating layer, the pixel circuit being located on the side of the first electrode close to the substrate, and the first insulating layer covering the pixel circuit.

[0019] Optionally, the display panel further includes: a first connecting lead and a second connecting lead; the first connecting lead is connected between the first electrode and the first electrode of the light-emitting device, and the second connecting lead is connected between the second electrode and the second electrode of the light-emitting device;

[0020] Preferably, the first connecting lead, the second connecting lead, and the first electromagnetic induction coil are arranged in the same layer.

[0021] Optionally, the conductivity of the material of the first electrode is greater than or equal to the conductivity of the material of the first connecting lead;

[0022] The conductivity of the second electrode is greater than or equal to the conductivity of the first connecting lead;

[0023] Preferably, the conductivity of the material of the first electromagnetic induction coil is greater than or equal to the conductivity of the material of the first connecting lead.

[0024] Optionally, the display panel may also include:

[0025] A second insulating layer is located between the first electrode and the first electromagnetic induction coil in the thickness direction of the display panel.

[0026] Preferably, the dielectric constant of the material of the second insulating layer is less than the dielectric constant of the material of the first insulating layer;

[0027] Preferably, the display panel further includes:

[0028] A third insulating layer is located on the surface of the second insulating layer away from the substrate and covers the first electromagnetic induction coil, the first connecting lead, and the second connecting lead;

[0029] The dielectric constant of the material of the third insulating layer is less than that of the material of the first insulating layer.

[0030] Optionally, the display panel may also include:

[0031] An encapsulation layer is located on the side of the first electromagnetic induction coil away from the substrate and covers the light-emitting device;

[0032] Preferably, the dielectric constant of the encapsulation layer material is less than the dielectric constant of the first insulating layer material.

[0033] Optionally, the winding direction of the first electromagnetic induction coil is parallel to the surface of the substrate away from the first electromagnetic induction coil;

[0034] The first electromagnetic induction coil is made of conductive wire wound in a spiral shape, and the thickness of the first electromagnetic induction coil is equal to the diameter of the conductive wire.

[0035] Optionally, the display panel may also include:

[0036] An electromagnetic lead is provided, with its first end connected to the first electromagnetic induction coil and its second end connected to the touch chip corresponding to the display panel.

[0037] According to another aspect of the present invention, a display device is provided, the display device comprising the display panel described in any embodiment of the present invention.

[0038] The technical solution of this invention integrates the first electromagnetic induction coil into the display panel by placing the first electromagnetic induction coil on the side of the light-emitting device closest to the substrate. This eliminates the need for an additional electromagnetic induction substrate and the need to bond the display panel to the electromagnetic induction substrate, reducing the thickness of the display device and facilitating a thinner and lighter design, thereby improving the performance of the display device. Furthermore, the first electromagnetic induction coil does not obstruct the light-emitting surface of the light-emitting device, thus avoiding any impact on the light emitted by the device and the displayed image. Therefore, by placing the first electromagnetic induction coil within the display panel, the thickness of the display device is reduced while ensuring normal light emission from the light-emitting device, improving the performance of both the display panel and the display device.

[0039] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a cross-sectional view of a display panel provided in an embodiment of the present invention;

[0042] Figure 2 This is a cross-sectional view of another display panel provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of another display panel provided in an embodiment of the present invention;

[0045] Figure 5 This is a cross-sectional view of another display panel provided in an embodiment of the present invention;

[0046] Figure 6 This is a cross-sectional view of another display panel provided in an embodiment of the present invention;

[0047] Figure 7 This is a cross-sectional view of another display panel provided in an embodiment of the present invention;

[0048] Figure 8 This is a cross-sectional view of another display panel provided in an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Detailed Implementation

[0050] 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 of the present invention. 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 scope of protection of the present invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention 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 invention 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.

[0052] As mentioned in the background section, existing display devices suffer from poor performance. The inventors have discovered that this problem arises because the display device includes a touch substrate and a display panel. The display panel includes light-emitting devices, which can include light-emitting diodes (LEDs) or organic light-emitting diodes (OLEDs). The touch substrate includes touch sensing devices, which can be capacitive or electromagnetic. The touch sensing devices are connected to the touch chip of the display device, and the touch chip can obtain the voltage from the touch sensing devices.

[0053] Touch chips can determine the touch position based on changes in the voltage of touch sensors, thus enabling touch control. For example, when a stylus or finger touches a display device, the capacitance of the capacitive sensor at the corresponding location changes, resulting in a change in its voltage. The touch chip can then determine the touch position based on this voltage change. Similarly, when a stylus (electromagnetic pen) touches a display device, the magnetic field of the electromagnetic sensor at the corresponding location changes, i.e., the magnetic flux of the electromagnetic sensor changes, resulting in a change in its voltage. The touch chip can then determine the touch position based on this voltage change.

[0054] In related technologies, the touch substrate is treated as an independent substrate and attached to the surface of the display panel by adhesive or other bonding techniques. This results in a thicker display device, which affects the thinner and lighter design of the display device and leads to poorer performance.

[0055] To address the aforementioned technical problems, embodiments of the present invention provide a display panel. Figure 1 This is a cross-sectional view of a display panel provided in an embodiment of the present invention, with reference to... Figure 1The display panel includes:

[0056] substrate 110;

[0057] Multiple light-emitting devices 120 are located on one side of the substrate 110;

[0058] Multiple first electromagnetic induction coils 130 are located on the side of the light-emitting device 120 close to the substrate 110, and the orthographic projection of the first electromagnetic induction coils 130 on the substrate 110 does not overlap with the orthographic projection of the light-emitting device 120 on the substrate 110.

[0059] The substrate 110 provides support, protection, and cushioning. The substrate 110 can be a flexible substrate or a rigid substrate, such as a glass substrate; this embodiment does not limit its application. The light-emitting device 120 can include a light-emitting diode (LED) or a Micro LED. Therefore, the display device formed by the display panel can be a Micro LED display device or a Mini LED display device; this embodiment does not limit its application. The display panel includes a plurality of first electromagnetic induction coils 130. The number of turns of the first electromagnetic induction coil 130 can be single-turn or multi-turn; this is not limited here. The first electromagnetic induction coil 130 can be wound into a circle, a rectangle, or other polygonal shapes; this embodiment does not limit its application.

[0060] Multiple first electromagnetic induction coils 130 can be disposed on the same film layer, and the multiple first electromagnetic induction coils 130 can be arranged in an array. Between two adjacent light-emitting devices 120 in the orthographic projection of the substrate 110, there may be one, two, or multiple first electromagnetic induction coils 130 in the orthographic projection of the substrate 110. This embodiment does not limit this. Figure 1 The diagram shows a case where a first electromagnetic induction coil 130 is disposed between two adjacent light-emitting devices 120. That is, there may be a first electromagnetic induction coil 130 projected onto the substrate 110 between the orthogonal projections of two adjacent light-emitting devices 120 onto the substrate 110, but this is not a limitation.

[0061] When the first electromagnetic induction coil 130 is energized, it generates a magnetic field. When a stylus (electromagnetic pen) approaches the first electromagnetic induction coil 130, the magnetic flux of the first electromagnetic induction coil 130 changes, resulting in a change in the voltage of the first electromagnetic induction coil 130. Therefore, by obtaining the voltage of the first electromagnetic induction coil 130, the touch position can be determined based on the voltage change of the first electromagnetic induction coil 130, thereby controlling the light-emitting device 120 corresponding to the touch position to emit light, facilitating touch control. The stylus can be an active stylus, meaning it can generate a magnetic field when energized. When the stylus approaches the first electromagnetic induction coil 130, the magnetic field generated by the stylus causes a change in the magnetic field of the first electromagnetic induction coil 130, resulting in a change in the magnetic flux of the first electromagnetic induction coil 130, and consequently, a change in the voltage of the first electromagnetic induction coil 130. Alternatively, the stylus can be a passive stylus, meaning the stylus tip can be made of conductive material. When the stylus approaches the first electromagnetic induction coil 130, it will also cause a change in the magnetic field of the first electromagnetic induction coil 130, thereby causing a change in the voltage of the first electromagnetic induction coil 130.

[0062] For example, the first electromagnetic induction coils 130 in each row are connected in parallel or series and then connected to the touch chip, and the first electromagnetic induction coils 130 in each column are also connected in parallel or series and then connected to the touch chip. This allows the touch chip to obtain the voltage of the first electromagnetic induction coils 130 in each row and each column. For example, if the touch chip detects a change in the voltage of the first electromagnetic induction coil 130 in the i-th row and j-th column, it can determine that a touch has occurred at the first electromagnetic induction coil 130 in the i-th row and j-th column, and thus determine the touch position. After sending the touch position to the driver chip, the driver chip can drive the light-emitting device 120 corresponding to the touch position to emit light, thereby realizing touch control. The touch chip can be a separate chip or integrated into the driver chip; this embodiment does not limit this. Here, i and j are integers greater than or equal to 1.

[0063] Specifically, by placing the first electromagnetic induction coil 130 on the side of the light-emitting device 120 near the substrate 110, the first electromagnetic induction coil 130 can be integrated into the display panel. This eliminates the need for an additional electromagnetic induction substrate and the need to bond the display panel to the electromagnetic induction substrate, reducing the thickness of the display device and facilitating a thinner, lighter design, thus improving the performance of the display device. Furthermore, placing the first electromagnetic induction coil 130 on the side of the light-emitting device 120 near the substrate 110 ensures that the first electromagnetic induction coil 130 does not affect the outward emission of light from the light-emitting device 120, i.e., it does not affect the displayed image. Moreover, the orthographic projection of the first electromagnetic induction coil 130 onto the substrate 110 does not overlap with the orthographic projection of the light-emitting device 120 onto the substrate 110, further preventing the first electromagnetic induction coil 130 from affecting the light emission of the light-emitting device 120. Thus, by placing the first electromagnetic induction coil 130 in the display panel, the thickness of the display device formed by the display panel is reduced while ensuring normal light emission of the light-emitting device 120, improving the performance of both the display panel and the display device.

[0064] Furthermore, integrating the first electromagnetic induction coil 130 into the display panel can avoid the problem that the touch substrate cannot perform electromagnetic induction properly due to the separate touch substrate not being firmly fixed to the display panel, thus improving the reliability and stability of touch sensing.

[0065] The technical solution of this embodiment integrates the first electromagnetic induction coil into the display panel by placing it on the side of the light-emitting device closest to the substrate. This eliminates the need for an additional electromagnetic induction substrate and the need to bond the display panel to the electromagnetic induction substrate, reducing the thickness of the display device and facilitating a thinner and lighter design, thereby improving the performance of the display device. Furthermore, the first electromagnetic induction coil does not obstruct the light-emitting surface of the light-emitting device, thus avoiding any impact on the light emitted by the device and the displayed image. In this way, by placing the first electromagnetic induction coil within the display panel, the thickness of the display device is reduced while ensuring normal light emission from the light-emitting device, improving the performance of both the display panel and the display device.

[0066] Based on the above technical solutions, the following description may also include the structure of the display panel, but it is not intended to limit this application.

[0067] Figure 2 This is a cross-sectional view of another display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 2 The display panel also includes:

[0068] Multiple second electromagnetic induction coils 140 are located on the side of the first electromagnetic induction coil 130 away from the substrate 110, and the orthographic projection of the first electromagnetic induction coil 130 on the substrate 110 coincides with the orthographic projection of the second electromagnetic induction coil 140 on the substrate 110.

[0069] The number of turns of the second electromagnetic induction coil 140 can be the same as that of the first electromagnetic induction coil 130, and the shape of the second electromagnetic induction coil 140 can also be the same as that of the first electromagnetic induction coil 130. The orthographic projection of the first electromagnetic induction coil 130 onto the substrate 110 coincides with the orthographic projection of the second electromagnetic induction coil 140 onto the substrate 110. Therefore, the orthographic projection of the second electromagnetic induction coil 140 onto the substrate 110 does not overlap with the orthographic projection of the light-emitting device 120 onto the substrate 110, ensuring that the second electromagnetic induction coil 140 does not affect the light emission of the light-emitting device 120. Multiple second electromagnetic induction coils 140 can be disposed on the same film layer, and multiple second electromagnetic induction coils 140 can be arranged in an array.

[0070] Specifically, by setting a first electromagnetic induction coil 130 and a second electromagnetic induction coil 140, a double-layer coil can be formed. The magnetic flux of the magnetic field at the first electromagnetic induction coil 130 becomes the sum of the magnetic flux of the magnetic field of the first electromagnetic induction coil 130 and the magnetic field of the second electromagnetic induction coil 140. When the stylus touches the display panel, the change in the magnetic flux of the magnetic field of the first electromagnetic induction coil 130 is more obvious, making it easier to recognize the touch, improving the touch sensitivity, and further improving the performance of the display panel and the display device formed by the display panel.

[0071] Optionally, refer to Figure 2 The second electromagnetic induction coil 140 is disposed on the same layer as the light-emitting device 120. In this way, there is no need to set an additional film layer, which facilitates the thin and light design of the display panel. Furthermore, the second electromagnetic induction coil 140 does not block the light-emitting surface of the light-emitting device 120, so that the second electromagnetic induction coil 140 will not block the light of the light-emitting device 120 and avoid affecting the light emission of the light-emitting device 120.

[0072] Based on the above technical solution, the connection method of the first electromagnetic induction coil 130 and the second electromagnetic induction coil 140 will be described below, but this is not intended to limit the present application.

[0073] In one embodiment, each second electromagnetic induction coil 140 is connected in series or in parallel with the corresponding first electromagnetic induction coil 130.

[0074] Specifically, the first electromagnetic induction coil 130 corresponding to the second electromagnetic induction coil 140 refers to the first electromagnetic induction coil 130 whose orthogonal projection on the substrate 110 coincides with the orthogonal projection of the second electromagnetic induction coil 140 on the substrate 110. That is, the first electromagnetic induction coil 130 and the second electromagnetic induction coil 140 are arranged in a one-to-one correspondence, and the orthogonal projection of the first electromagnetic induction coil 130 on the substrate 110 coincides with the orthogonal projection of the corresponding second electromagnetic induction coil 140 on the substrate 110.

[0075] Specifically, by connecting the second electromagnetic induction coil 140 in series or in parallel with the corresponding first electromagnetic induction coil 130, the magnetic field generated by the first electromagnetic induction coil 130 and the magnetic field generated by the second electromagnetic induction coil 140 can be superimposed, resulting in a larger magnetic flux at the first electromagnetic induction coil 130. When the stylus touches the display panel, the change in magnetic flux of the first electromagnetic induction coil 130 is more obvious, thereby improving the touch sensitivity.

[0076] In another implementation, Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, for reference. Figure 3 Multiple second electromagnetic induction coils 140 arranged along the first direction X are connected in parallel to form a first group of electromagnetic induction coils 141. Figure 4 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, for reference. Figure 4 Multiple first electromagnetic induction coils 130 arranged along the first direction X are connected in parallel to form a second group of electromagnetic induction coils 142. The first group of electromagnetic induction coils 141 and the corresponding second group of electromagnetic induction coils 142 are connected in series or in parallel.

[0077] refer to Figure 3 Multiple second electromagnetic induction coils 140 arranged along the second direction Y are connected in parallel to form a third group of electromagnetic induction coils 143, as referenced. Figure 4 Multiple first electromagnetic induction coils 130 arranged along the second direction Y are connected in parallel to form a fourth group of electromagnetic induction coils 144. The third group of electromagnetic induction coils 143 is connected in series or in parallel with the corresponding fourth group of electromagnetic induction coils 144. The first direction X intersects with the second direction Y.

[0078] In this embodiment, the first direction X can be the row direction, and the second direction Y can be the column direction. Alternatively, the first direction X can be a diagonal direction at a certain angle to the row direction, and the second direction Y can be a diagonal direction at a certain angle to the column direction, with the first direction X and the second direction Y intersecting. This embodiment does not impose any limitations on this.

[0079] It should be noted that, Figure 3 and Figure 4The diagram illustrates the case where the first direction X is the row direction as commonly referred to, and the second direction Y is the column direction as commonly referred to, but it does not impose any limitations. Figure 3 The diagram shows that the second electromagnetic induction coil 140 is rectangular. Figure 4 The diagram shows the case where the first electromagnetic induction coil 130 is rectangular, but it is not limited to that case. Figure 3 The diagram illustrates the second electromagnetic induction coil 140, but does not limit the number of turns or the winding method of the second electromagnetic induction coil 140. Figure 4 The diagram illustrates the first electromagnetic induction coil 130, but does not limit the number of turns or the winding method of the first electromagnetic induction coil 130.

[0080] Specifically, the second group of electromagnetic induction coils 142 corresponding to the first group of electromagnetic induction coils 141 refers to the second group of electromagnetic induction coils 142 whose orthographic projection on the substrate 110 coincides with the orthographic projection of the first group of electromagnetic induction coils 141 on the substrate 110. In other words, the orthographic projection of the first group of electromagnetic induction coils 141 on the substrate 110 coincides with the orthographic projection of the corresponding second group of electromagnetic induction coils 142 on the substrate 110. Similarly, the orthographic projection of the third group of electromagnetic induction coils 143 on the substrate 110 coincides with the orthographic projection of the corresponding fourth group of electromagnetic induction coils 144 on the substrate 110.

[0081] Specifically, the first set of electromagnetic induction coils 141 is connected in series or in parallel with the corresponding second set of electromagnetic induction coils 142, thereby strengthening the magnetic field in the first direction X. The third set of electromagnetic induction coils 143 is connected in series or in parallel with the corresponding fourth set of electromagnetic induction coils 144, thereby strengthening the magnetic field in the second direction Y. In this way, the specific touch position can be better determined based on the changes in the magnetic field (voltage change) in the first direction X and the second direction Y, that is, the coordinates of the touch position can be determined, which is beneficial to improving the touch sensitivity.

[0082] It should be noted that, Figure 3 This only shows the connection relationship between the second electromagnetic induction coils 140, and does not limit the wiring method and the arrangement of the second electromagnetic induction coils 140. Figure 4 The diagram only shows the connection relationship between the first electromagnetic induction coils 130, and does not limit the wiring method or the arrangement of the first electromagnetic induction coils 130.

[0083] Based on the above technical solutions, the following describes the structures that the display panel may also include, but this is not intended to limit this application.

[0084] Figure 5 This is a cross-sectional view of another display panel provided in an embodiment of the present invention. Figure 6 This is a cross-sectional view of another display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 5 or Figure 6 The display panel also includes:

[0085] The first electrode 151 and the second electrode 152 are connected to the first electrode 151 and the second electrode 152 of the light-emitting device 120. The first electrode 151 and the second electrode 152 are located on the side of the light-emitting device 120 close to the substrate 110.

[0086] Specifically, for example, the first electrode of the light-emitting device 120 is the anode, and the second electrode is the cathode; or, the first electrode of the light-emitting device 120 is the cathode, and the second electrode is the anode. This embodiment is not limited to this. By providing a first electrode 151 and a second electrode 152, voltage can be supplied to the first electrode of the light-emitting device 120 through the first electrode 151, and voltage can be supplied to the second electrode of the light-emitting device 120 through the second electrode 152. When the voltage difference between the first electrode and the second electrode of the light-emitting device 120 reaches the turn-on voltage of the light-emitting device 120, the light-emitting device 120 can emit light. In this way, it is convenient to drive the light-emitting device 120 to emit light.

[0087] Optionally, refer to Figure 5 or Figure 6 The first electrode 151 and the second electrode 152 are insulated from each other in the same layer. This reduces the number of film layers, decreases the thickness of the display panel, and facilitates a thinner and lighter design for the display panel and display device. Furthermore, the insulation between the first electrode 151 and the second electrode 152 prevents interference between the voltages on the first electrode 151 and the second electrode 152, ensuring the accuracy of the voltage transmitted to the light-emitting device 120 and guaranteeing its normal light emission. This improves the reliability and stability of the display panel and further enhances its performance.

[0088] Optionally, refer to Figure 5 or Figure 6 The display panel also includes a pixel circuit 160 and a first insulating layer 171. The pixel circuit 160 is located on the side of the first electrode 151 near the substrate 110, and the first insulating layer 171 covers the pixel circuit 160.

[0089] The pixel circuit 160 can be a 2T1C pixel circuit or its variations, a 7T1C pixel circuit or its variations, a 3T1C pixel circuit, or a 5T1C pixel circuit, etc., and this embodiment is not limited to any particular type. The pixel circuit 160 can be connected to the first electrode 151, through which a driving voltage is provided to the first electrode of the light-emitting device 120. The second electrode 152 can provide a power supply voltage to the second electrode of the light-emitting device 120, facilitating the light emission of the light-emitting device 120.

[0090] Specifically, the first insulating layer 171 can be an organic insulating layer or an inorganic insulating layer. The first insulating layer 171 covers the pixel circuit 160, isolating the pixel circuit 160 from the second electrode 152, etc., preventing the voltage on the second electrode 152 from affecting the voltage of the pixel circuit 160. By placing the pixel circuit 160 on the side of the first electrode 151 closer to the substrate 110, the first electrode 151 and the second electrode 152 can shield against electromagnetic interference, preventing the voltage in the pixel circuit 160 from affecting the magnetic field of the first electromagnetic induction coil 130, and preventing the magnetic field of the first electromagnetic induction coil 130 from affecting the driving voltage and driving current generated by the pixel circuit 160. This improves the reliability and stability of the display panel, further enhancing the performance of the display panel and display device.

[0091] Optionally, refer to Figure 5 or Figure 6 The display panel also includes a first connecting lead 181 and a second connecting lead 182. The first connecting lead 181 is connected between the first electrode and the first electrode 151 of the light-emitting device 120, and the second connecting lead 182 is connected between the second electrode and the second electrode 152 of the light-emitting device 120. This facilitates the connection of the first electrode of the light-emitting device 120 to the first electrode 151 and the second electrode of the light-emitting device 120 to the second electrode 152, allowing driving voltage to be transmitted to the first electrode of the light-emitting device 120 through the first electrode 151 and power supply voltage to be transmitted to the second electrode of the light-emitting device 120 through the second electrode 152. The first connecting lead 181 can be connected to the first electrode 151 via a via, and the second connecting lead 182 can be connected to the second electrode 152 via a via.

[0092] Optionally, refer to Figure 5 or Figure 6 The first connecting lead 181 and the second connecting lead 182 are disposed on the same layer as the first electromagnetic induction coil 130. Therefore, it is not necessary to add a film layer to the display panel to house the first electromagnetic induction coil 130; that is, the first electromagnetic induction coil 130 can be disposed within the existing film layer of the display panel, thus avoiding increasing the thickness of the display panel. Furthermore, the elimination of an additional touch substrate reduces the thickness of the display device formed by the display panel, facilitating a thinner and lighter design of the display device and improving the performance of both the display panel and the display device.

[0093] Based on the above technical solutions, optionally, the conductivity of the material of the first electrode 151 is greater than or equal to the conductivity of the material of the first connecting lead 181; the conductivity of the second electrode 152 is greater than or equal to the conductivity of the first connecting lead 182. This results in better conductivity of the materials of the first electrode 151 and the second electrode 152, achieving better electromagnetic shielding. This prevents changes in the magnetic field of the first electromagnetic induction coil 130 caused by the voltage in the pixel circuit 160, and avoids the magnetic field of the first electromagnetic induction coil 130 affecting the driving voltage and driving current generated by the pixel circuit 160. This improves the reliability and stability of the display panel, thereby enhancing the performance of the display panel and the display device. The materials of the first electrode 151 and the second electrode 152 can be the same; for example, the materials of the first electrode 151 and the second electrode 152 may include conductive materials such as copper.

[0094] Optionally, the conductivity of the material of the first electromagnetic induction coil 130 is greater than or equal to the conductivity of the material of the first connecting lead 181. This results in better conductivity and lower resistance for the first electromagnetic induction coil 130, reducing energy loss and thus improving its electromagnetic induction capability, thereby enhancing the sensitivity of touch recognition. The material of the first electromagnetic induction coil 130 may include conductive materials such as copper.

[0095] Based on the above technical solutions, the following describes the film layer structure that the display panel may also include, but this is not intended to limit this application.

[0096] Optionally, refer to Figure 5 or Figure 6 The display panel includes:

[0097] The second insulating layer 172 is located between the first electrode 151 and the first electromagnetic induction coil 130 in the thickness direction of the display panel.

[0098] Specifically, the second insulating layer 172 can be an inorganic insulating layer or an organic insulating layer. By placing the second insulating layer 172 between the film layer containing the first electrode 151 and the film layer containing the first electromagnetic induction coil 130, the second insulating layer 172 can insulate the first electromagnetic induction coil 130 from the first electrode 151 and from the second electrode 152. This can reduce the coupling capacitance between the first electromagnetic induction coil 130 and the first electrode 151, and reduce the coupling capacitance between the first electromagnetic induction coil 130 and the second electrode 152, avoiding mutual interference between the first electromagnetic induction coil 130 and the first electrode 151, and avoiding mutual interference between the first electromagnetic induction coil 130 and the second electrode 152, thereby reducing the losses of the first electromagnetic induction coil 130, the first electrode 151, and the second electrode 152, and improving the sensing sensitivity of the first electromagnetic induction coil 130.

[0099] Optionally, the dielectric constant of the material of the second insulating layer 172 is lower than that of the material of the first insulating layer 171. This results in a lower dielectric constant for the material of the second insulating layer 172, which further reduces the coupling capacitance between the first electromagnetic induction coil 130 and the first electrode 151, and further reduces the coupling capacitance between the first electromagnetic induction coil 130 and the second electrode 152. This further reduces the losses of the first electromagnetic induction coil 130, the first electrode 151, and the second electrode 152, and reduces the heat generated by the first electromagnetic induction coil 130 during induction, facilitating heat dissipation of the first electromagnetic induction coil 130.

[0100] Optionally, refer to Figure 5 or Figure 6 The display panel also includes:

[0101] The third insulating layer 173 is located on the surface of the second insulating layer 172 away from the substrate 110 and covers the first electromagnetic induction coil 130, the first connecting lead 181 and the second connecting lead 182.

[0102] The dielectric constant of the material of the third insulating layer 173 is less than that of the material of the first insulating layer 171.

[0103] Specifically, the third insulating layer 173 can be an organic or inorganic insulating layer, and the material of the third insulating layer 173 can be the same as or different from the material of the second insulating layer 172. By setting the third insulating layer 173, the first electromagnetic induction coil 130 is insulated from the light-emitting device 120, avoiding the coupling capacitance caused by the close proximity of the first electromagnetic induction coil 130 and the light-emitting device 120. This avoids mutual interference between the first electromagnetic induction coil 130 and the light-emitting device 120, ensures normal light emission of the light-emitting device 120, and reduces the loss of the first electromagnetic induction coil 130, which is beneficial to improving the reliability and stability of the display panel.

[0104] By setting the dielectric constant of the material of the third insulating layer 173 to be smaller than that of the material of the first insulating layer 171, the dielectric constant of the third insulating layer 173 is reduced, thereby further reducing the coupling capacitance between the first electromagnetic induction coil 130 and the light-emitting device 120 and reducing the loss of the first electromagnetic induction coil 130.

[0105] Based on the above technical solutions, Figure 7 This is a cross-sectional view of another display panel provided in an embodiment of the present invention. Figure 8 This is a cross-sectional view of another display panel provided in an embodiment of the present invention. Optionally, refer to... Figure 7 or Figure 8 The display panel also includes:

[0106] The encapsulation layer 174 is located on the side of the first electromagnetic induction coil 130 away from the substrate 110 and covers the light-emitting device 120.

[0107] Specifically, the encapsulation layer 174 can be an inorganic layer or an organic layer, or a stack of inorganic and organic layers; this embodiment does not impose any limitations. By setting the encapsulation layer 174, the display panel can be encapsulated, covering the light-emitting device 120. This achieves the effect of protecting the light-emitting device 120, preventing it from being corroded by moisture and other gases, ensuring that the light-emitting device 120 can emit light normally, and improving the reliability and stability of the display panel.

[0108] And, as Figure 8 As shown, the encapsulation layer 174 covers the second electromagnetic induction coil 140, which can protect the second electromagnetic induction coil 140 and make the second electromagnetic induction coil 140 insulated from other electrodes or leads, so as to avoid affecting the electromagnetic induction of the second electromagnetic induction coil 140.

[0109] Optionally, the dielectric constant of the material of the encapsulation layer 174 is lower than that of the material of the first insulating layer 171. This results in a lower dielectric constant for the encapsulation layer 174, leading to a larger change in the magnetic field of the first electromagnetic induction coil 130 when the stylus (electromagnetic pen) approaches it. This enhances the electromagnetic induction between the first electromagnetic induction coil 130 and the stylus, thereby increasing the sensitivity of the first electromagnetic induction coil 130, reducing electromagnetic propagation losses, improving electromagnetic induction accuracy, and ultimately enhancing the performance of the display panel and the display device formed therefrom. Similarly, this can increase the sensitivity of the second electromagnetic induction coil 140, improving the touch response.

[0110] Based on the above technical solutions, optionally, the winding direction of the first electromagnetic induction coil 130 is parallel to the surface of the substrate 110 away from the first electromagnetic induction coil 130.

[0111] The first electromagnetic induction coil 130 is made of conductive wire wound in a spiral shape, and the thickness of the first electromagnetic induction coil 130 is equal to the diameter of the conductive wire.

[0112] Specifically, the winding direction of the first electromagnetic induction coil 130 is parallel to the surface of the substrate 110 away from the surface of the first electromagnetic induction coil 130. That is, the first electromagnetic induction coil 130 is horizontally wound into a spiral shape by conductive wire, so that the thickness of the first electromagnetic induction coil 130 formed by winding is very small. The thickness of the first electromagnetic induction coil 130 is equal to the wire diameter of the conductive wire, which is beneficial to the thin and light design of the display panel. The conductive wire can be copper wire or enameled wire, or it can be conductive wire of other materials. This embodiment does not limit it.

[0113] Similarly, the winding direction of the second electromagnetic induction coil 140 is parallel to the surface of the substrate 110 and away from the surface of the first electromagnetic induction coil 130; the second electromagnetic induction coil 140 is wound into a spiral shape by conductive wire, and the thickness of the second electromagnetic induction coil 140 is equal to the wire diameter. In this way, the thickness of the second electromagnetic induction coil 140 is very small, which facilitates the thin and light design of the display panel and the display device formed by the display panel.

[0114] The first electromagnetic induction coil 130 and the second electromagnetic induction coil 140 may have the same number of turns, and the first electromagnetic induction coil 130 and the second electromagnetic induction coil 140 may have the same shape, which may be rectangular, circular or other polygonal shapes. This embodiment does not limit them.

[0115] Based on the above technical solutions, optionally, refer to Figure 4 The display panel also includes:

[0116] The electromagnetic lead 190 has its first end connected to the first electromagnetic induction coil 130 and its second end connected to the touch chip corresponding to the display panel.

[0117] Specifically, the display device formed by the display panel may include a touch chip, that is, the display panel is correspondingly provided with a touch chip. By setting an electromagnetic lead 190, the first electromagnetic induction coil 130 is connected to the touch chip, so that the touch chip can obtain the voltage of the first electromagnetic induction coil 130, and thus determine the touch position according to the voltage change of the first electromagnetic induction coil 130.

[0118] In this embodiment, the electromagnetic lead 190 can connect multiple first electromagnetic induction coils 130 to the touch chip. Specifically, the multiple first electromagnetic induction coils 130 are connected via the electromagnetic lead 190 to form a second group of electromagnetic induction coils 142 or a fourth group of electromagnetic induction coils 144. The second group of electromagnetic induction coils 142 or the fourth group of electromagnetic induction coils 144 are then connected to the touch chip via the electromagnetic lead 190. Alternatively, the electromagnetic lead 190 can connect each first electromagnetic induction coil 130 to the touch chip; that is, each first electromagnetic induction coil 130 is connected to the touch chip via the electromagnetic lead 190. This embodiment does not impose a limitation on this method.

[0119] Similarly, such as Figure 3 As shown, the electromagnetic lead 190 can also connect the second electromagnetic induction coil 140, and then connect the second electromagnetic induction coil 140 to the first electromagnetic induction coil 130 or the touch chip. It should be noted that... Figure 4 The diagram only shows the connection between the electromagnetic lead 190 and the first electromagnetic induction coil 130, and does not limit the routing of the electromagnetic lead 190. Figure 3 The diagram only shows the connection between the electromagnetic lead 190 and the second electromagnetic induction coil 140, and does not limit the routing of the electromagnetic lead 190.

[0120] Furthermore, the technical solution of this embodiment, by setting the electromagnetic lead 190 in the display panel, eliminates the need to set a separate touch substrate for the electromagnetic lead 190, that is, there is no need to attach the touch substrate to the surface of the display panel. Thus, the electromagnetic lead 190 does not need to be set as a transparent trace, reducing the cost of the display panel and the display device.

[0121] Based on the above technical solutions, the pixel circuit 160 may include multiple thin-film transistors and storage capacitors. For example, the pixel circuit 160 includes a data writing transistor, a driving transistor, and a storage capacitor. The data writing transistor can transmit data voltage to the driving transistor, and the driving transistor can generate a driving current according to the data voltage, thereby causing the light-emitting device 120 to emit light in response to the driving current. The storage capacitor can maintain the control electrode potential of the driving transistor, thereby maintaining the driving current generated by the driving transistor and ensuring that the light-emitting device 120 emits light. The pixel circuit 160 may also include other transistors, such as initialization transistors and threshold compensation transistors, etc. This embodiment does not limit the scope of the invention. Figure 7 and Figure 8 The structure of the transistor in the pixel circuit 160 is illustrated using the data writing transistor T1 in the pixel circuit 160 as an example. Figure 7 or Figure 8As shown, the pixel circuit 160 includes a data writing transistor T1, which includes a first terminal T11, a second terminal T12, a control terminal T13, and an active layer T14. For example, the first terminal T11 may be the source, and the second terminal T12 may be the drain; alternatively, the first terminal T11 may be the drain, and the second terminal T12 may be the source. This embodiment does not impose such limitations. The first terminal T11 of the data writing transistor T1 is connected to either the drain or source region of the active layer T14, and the second terminal T12 is connected to either the source or drain region of the active layer T14. The control terminal T13 of the data writing transistor T1 is the gate.

[0122] This invention also provides a display device. Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. Figure 9 As shown, the display device 20 includes the display panel 21 provided in any embodiment of the present invention. Therefore, the display device 20 has the same beneficial effects as the display panel 21 provided in any embodiment of the present invention, which will not be described in detail here. The display device 20 can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, etc.

[0123] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. 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 invention should be included within the scope of protection of this invention.

Claims

1. A display panel, characterized in that, include: substrate; Multiple light-emitting devices are located on one side of the substrate; A plurality of first electromagnetic induction coils are located on the side of the light-emitting device closer to the substrate, and the orthographic projection of the first electromagnetic induction coils on the substrate does not overlap with the orthographic projection of the light-emitting device on the substrate.

2. The display panel according to claim 1, characterized in that, Also includes: A plurality of second electromagnetic induction coils are located on the side of the first electromagnetic induction coil away from the substrate, and the orthographic projection of the first electromagnetic induction coil on the substrate coincides with the orthographic projection of the second electromagnetic induction coil on the substrate. Preferably, the second electromagnetic induction coil is disposed on the same layer as the light-emitting device; Preferably, each of the second electromagnetic induction coils is connected in series or in parallel with the corresponding first electromagnetic induction coil; Alternatively, a plurality of second electromagnetic induction coils arranged along the first direction are connected in parallel to form a first group of electromagnetic induction coils, and a plurality of first electromagnetic induction coils arranged along the first direction are connected in parallel to form a second group of electromagnetic induction coils, wherein the first group of electromagnetic induction coils and the corresponding second group of electromagnetic induction coils are connected in series or in parallel. A plurality of second electromagnetic induction coils arranged along the second direction are connected in parallel to form a third group of electromagnetic induction coils, and a plurality of first electromagnetic induction coils arranged along the second direction are connected in parallel to form a fourth group of electromagnetic induction coils. The third group of electromagnetic induction coils is connected in series or in parallel with the corresponding fourth group of electromagnetic induction coils; wherein, the first direction and the second direction intersect.

3. The display panel according to claim 1, characterized in that, Also includes: The first electrode and the second electrode are connected to the first electrode and the second electrode of the light-emitting device, respectively, and the first electrode and the second electrode are located on the side of the light-emitting device closer to the substrate. Preferably, the first electrode and the second electrode are insulated from each other in the same layer; Preferably, the display panel further includes a pixel circuit and a first insulating layer, the pixel circuit being located on the side of the first electrode close to the substrate, and the first insulating layer covering the pixel circuit.

4. The display panel according to claim 3, characterized in that, Also includes: A first connecting lead and a second connecting lead; the first connecting lead is connected between the first electrode and the first electrode of the light-emitting device, and the second connecting lead is connected between the second electrode and the second electrode of the light-emitting device; Preferably, the first connecting lead, the second connecting lead, and the first electromagnetic induction coil are arranged in the same layer.

5. The display panel according to claim 4, characterized in that, The conductivity of the material of the first electrode is greater than or equal to the conductivity of the material of the first connecting lead; The conductivity of the second electrode is greater than or equal to the conductivity of the first connecting lead; Preferably, the conductivity of the material of the first electromagnetic induction coil is greater than or equal to the conductivity of the material of the first connecting lead.

6. The display panel according to claim 4, characterized in that, Also includes: A second insulating layer is located between the first electrode and the first electromagnetic induction coil in the thickness direction of the display panel. Preferably, the dielectric constant of the material of the second insulating layer is less than the dielectric constant of the material of the first insulating layer; Preferably, the display panel further includes: A third insulating layer is located on the surface of the second insulating layer away from the substrate and covers the first electromagnetic induction coil, the first connecting lead, and the second connecting lead; The dielectric constant of the material of the third insulating layer is less than that of the material of the first insulating layer.

7. The display panel according to claim 3, characterized in that, Also includes: An encapsulation layer is located on the side of the first electromagnetic induction coil away from the substrate and covers the light-emitting device; Preferably, the dielectric constant of the encapsulation layer material is less than the dielectric constant of the first insulating layer material.

8. The display panel according to claim 1, characterized in that, The winding direction of the first electromagnetic induction coil is parallel to the surface of the substrate away from the first electromagnetic induction coil; The first electromagnetic induction coil is made of conductive wire wound in a spiral shape, and the thickness of the first electromagnetic induction coil is equal to the diameter of the conductive wire.

9. The display panel according to claim 1, characterized in that, Also includes: An electromagnetic lead is provided, with its first end connected to the first electromagnetic induction coil and its second end connected to the touch chip corresponding to the display panel.

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

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