Display panel and display device

Abstract

This invention provides a display panel and a display device. The display panel includes a display area and a non-display area surrounding the display area. The non-display area includes a first non-display area and a second non-display area opposite to each other along a first direction. The display panel further includes: a driving circuit including a first gate driving unit; and an electromagnetic induction coil including a plurality of first electromagnetic induction coils. Each first electromagnetic induction coil includes a first lead and a first winding portion electrically connected to the first lead. At least a portion of the first winding portion is located within the display area. The first gate driving unit is located within the second non-display area, and the first lead is located within the first non-display area. This invention solves the problem that the horizontal coil routing of the electromagnetic pen induction coil causes inconsistent space occupation by the coils on the left and right sides of the display panel, resulting in differences between the left and right sides of the display panel, which is detrimental to the application of the display panel in subsequent display devices.

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] Currently, in display devices, to save on component costs and improve system integration, integrating various functional components within the display screen is a development trend. The sensing module (electromagnetic induction coil) of an electromagnetic pen is precisely such a suitable functional module for integration into display devices. It can be integrated into LCD (liquid crystal display), OLED (organic light-emitting diode display), and also into mini LED (mini light-emitting diode display) and micro LED (micro light-emitting diode display) displays or backlights. Figure 1 As shown, in one current integration scheme, the signal line of the horizontal coil is pulled out separately at its left end to form a trace, and connected to the driver IC from the left non-display area, while the right end is directly shorted. In operation, the first signal line serves as the input signal line, and the fourth signal line serves as the output signal line, forming a coil. The remaining signal lines are configured similarly, thus forming a horizontal coil. The vertical coil follows the same principle. Because the horizontal coil trace of the electromagnetic pen's sensing coil causes inconsistent space occupation by the coil on the left and right bezels, a difference exists between the left and right bezels of the panel, which is detrimental to the application of the display panel in subsequent display devices. Summary of the Invention

[0003] Embodiments of the present invention provide a display panel and a display device to solve the problem that the horizontal coil routing of the electromagnetic pen induction coil causes inconsistent space occupied by the coil in the left and right bezels, resulting in differences between the left and right bezels of the panel, which is not conducive to the application of the display panel in subsequent display devices.

[0004] To address the above problems, the technical solutions provided by the embodiments of the present invention are as follows:

[0005] A display panel includes a display area and a non-display area disposed around the display area, the non-display area including a first non-display area and a second non-display area opposite to each other along a first direction; the display panel further includes:

[0006] The driving circuit includes a first gate driving unit; and

[0007] An electromagnetic induction coil includes a plurality of first electromagnetic induction coils, each first electromagnetic induction coil including a first lead and a first winding portion electrically connected to the first lead, at least a portion of the first winding portion being located within the display area;

[0008] The first gate driving unit is located in the second non-display area, and the first lead is located in the first non-display area.

[0009] According to a preferred embodiment of the present invention, the first lead includes a first input lead and a first output lead, and the two ends of the first winding portion are electrically connected to the first input lead and the first output lead, respectively. The first input lead and the first output lead are both located in the first non-display area.

[0010] According to a preferred embodiment of the present invention, the first winding portions of a plurality of first electromagnetic induction coils are electrically connected within the second non-display area.

[0011] According to a preferred embodiment of the present invention, the driving circuit further includes a second gate driving unit;

[0012] The electromagnetic induction coil also includes a plurality of second electromagnetic induction coils. The second electromagnetic induction coil includes a second lead and a second winding portion. The second lead includes a second input lead and a second output lead. The second winding portion is electrically connected to the second input lead and the second output lead respectively. At least a portion of the second winding portion is located within the display area.

[0013] The second gate driving unit is located in the first non-display area, and the second input lead and the second output lead are both located in the second non-display area.

[0014] According to a preferred embodiment of the present invention, there is an overlapping region between two adjacent first electromagnetic induction coils and between two adjacent second induction coils.

[0015] According to a preferred embodiment of the present invention, there is an overlapping area between adjacent first induction coils and second induction coils.

[0016] According to a preferred embodiment of the present invention, the number of turns of both the first winding portion and the second winding portion is greater than or equal to 1.

[0017] According to a preferred embodiment of the present invention, the non-display area further includes a third non-display area and a fourth non-display area disposed opposite to each other in a second direction, the second direction intersecting the first direction, and the electromagnetic induction coil further includes a plurality of third electromagnetic induction coils, the third electromagnetic induction coils being disposed intersecting with the first electromagnetic induction coil and the second electromagnetic induction coil respectively.

[0018] According to a preferred embodiment of the present invention, the driving circuit includes a first metal layer and a second metal layer, the first metal layer includes a source metal and a drain metal, the second metal layer includes a gate metal, the first metal layer further includes a first electromagnetic induction coil and a second electromagnetic induction coil, and the second metal layer further includes the third electromagnetic induction coil.

[0019] Embodiments of the present invention also provide a display device, including a display panel as described in any of the preceding claims.

[0020] The beneficial effects of the present invention are as follows: by placing the first lead of the first electromagnetic induction coil in the first non-display area and placing the first gate driving unit in the second non-display area, the first non-display area is used for the wiring of the electromagnetic induction coil and the second non-display area is used for the wiring of the driving circuit, so that the space required for the left and right bezels in the display panel is consistent, thereby solving the problem that the horizontal coil wiring of the electromagnetic pen induction coil causes the coil in the left and right bezels to occupy different spaces, resulting in differences between the left and right bezels of the display panel, which is not conducive to the application of the display panel in subsequent display devices. Attached Figure Description

[0021] 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.

[0022] Appendix Figure 1 This is a schematic diagram of the electromagnetic induction coil in the existing scheme;

[0023] Appendix Figure 2 This is a schematic diagram of the structure of an electromagnetic induction coil in one embodiment of the present invention;

[0024] Appendix Figure 3 This is a schematic diagram of the structure of an electromagnetic induction coil in one embodiment of the present invention;

[0025] Appendix Figure 4 This is a schematic diagram of the structure of the third electromagnetic induction coil in one embodiment of the present invention;

[0026] Appendix Figure 5 This is a schematic diagram of the structure of the first electromagnetic induction coil in one embodiment of the present invention;

[0027] Appendix Figure 6 This is a schematic diagram of the structure of the second electromagnetic induction coil in one embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0029] like Figure 2 As shown, an embodiment of the present invention provides a display panel 3, including a display area AA and a non-display area surrounding the display area AA. The display area AA includes a pixel region constructed by multiple data lines and multiple gate lines. Each pixel region is provided with a sub-pixel, and multiple sub-pixel arrays are arranged. The non-display area is arranged around the display area AA and includes a first non-display area and a second non-display area opposite each other along a first direction X. In this embodiment, the first non-display area corresponds to the left border of the display panel 3, and the second non-display area corresponds to the right border of the display panel 3.

[0030] The display panel 3 further includes a driving circuit and an electromagnetic induction coil. The driving circuit is located in the non-display area and is used to connect with the corresponding gate line to provide driving voltage for the corresponding sub-pixel. It includes a plurality of first gate driving units 22, all of which are located in the second non-display area, and each of the first gate driving units 22 is electrically connected to a corresponding gate line.

[0031] The electromagnetic induction coil is used to sense the position of the electromagnetic pen and includes a plurality of first electromagnetic induction coils 11 extending along the first direction X and arranged along the second direction Y. Each first electromagnetic induction coil 11 includes a first lead and a first winding portion 113 electrically connected to the first lead. The first lead is used to be electrically connected to a sensing signal input terminal and a sensing signal output terminal. In each first electromagnetic induction coil 11, at least a portion of the first winding portion 113 is located within the display area AA to sense the position of the electromagnetic pen within the display area AA. At least a portion of the first winding portion 113 is located within the second non-display area, and the first winding portions 113 of the plurality of first electromagnetic induction coils 11 located within the second non-display area are electrically connected to each other. The first lead is located within the first non-display area.

[0032] This invention places the first lead of the first electromagnetic induction coil 11 in the first non-display area and the first gate driving unit 22 in the second non-display area. The first non-display area is used for the wiring of the electromagnetic induction coil, and the second non-display area is used for the wiring of the driving circuit. By adopting a single-sided driving method, the frame used for the wiring of the electromagnetic induction coil is free of driving circuit wiring. This makes the space required for the left and right frames of the display panel 3 consistent, thereby solving the problem that the horizontal coil wiring of the electromagnetic pen induction coil causes inconsistent space occupied by the coil in the left and right frames, resulting in differences between the left and right frames of the display panel 3, which is not conducive to the application of the display panel 3 in subsequent display devices.

[0033] In some embodiments, such as Figure 2 As shown, the first lead includes a first input lead 111 and a first output lead 112. One end of the first winding portion 113 is electrically connected to the first input lead 111, and the other end of the first winding portion 113 is electrically connected to the first output lead 112. The first input lead 111 is electrically connected to a corresponding first sensing signal input terminal, and the first output lead 112 is electrically connected to a corresponding first sensing signal output terminal. Both the first input lead 111 and the first output lead 112 are located in the first non-display area. When the first sensing signal input terminal is energized, the corresponding first winding portion 113 will generate a magnetic field, and the movement of the electromagnetic pen will cause the magnetic field to change.

[0034] In some embodiments, such as Figure 3 As shown, the driving circuit also includes a plurality of second gate driving units 21. The second gate driving units 21 are located in the first non-display area. Each second gate driving unit 21 is electrically connected to a corresponding gate line and together with the first gate driving unit 22, provides driving voltage for the pixels in the display area AA. Setting driving circuits on both sides of the display panel 3 and providing driving voltage for the corresponding pixels is a technical means well known to those skilled in the art, and will not be described in detail here.

[0035] The electromagnetic induction coil further includes a plurality of second electromagnetic induction coils 12 extending along the first direction X and arranged along the second direction Y. Each second electromagnetic induction coil 12 includes a second lead and a second winding portion 123. One end of the second winding portion 123 is electrically connected to the second input lead 121, and the other end is electrically connected to the second output lead 122. The second input lead 121 is electrically connected to a corresponding second induction signal input terminal, and the second output lead 122 is electrically connected to a corresponding second induction signal output terminal. Both the second input lead 121 and the second output lead 122 are located in the second non-display area, and at least a portion of the second winding portion 123 is located within the display area AA. When the second induction signal input terminal is energized, the corresponding second winding portion 123 generates a magnetic field, and the movement of the electromagnetic pen causes a change in the magnetic field. In this embodiment, a plurality of first electromagnetic induction coils 11 are arranged from the upper edge to the lower edge of the display panel 3, and a plurality of second electromagnetic induction coils 12 are arranged from the lower edge to the upper edge of the display panel 3, with the plurality of first electromagnetic induction coils 11 and the plurality of second electromagnetic induction coils 12 having overlapping portions.

[0036] This invention addresses the problem that the horizontal coil routing of the electromagnetic pen induction coil causes inconsistent space occupation by the coil on the left and right sides of the display panel 3, which is detrimental to the application of the display panel 3 in subsequent display devices. This is achieved by placing the first and second leads of the electromagnetic induction coil in the first and second non-display areas respectively, and by evenly distributing the electromagnetic induction coil routing on the left and right sides of the display panel 3.

[0037] Please continue reading. Figure 3 It is known that the larger the area of ​​the sensing zone enclosed by the electromagnetic induction coils, the worse the sensing accuracy of the electromagnetic pen. In order to more accurately sense the position of the electromagnetic pen, the two adjacent first electromagnetic induction coils 11 in the display area AA are set to partially overlap. Similarly, the two adjacent second induction coils are also set to partially overlap to more accurately sense the position of the electromagnetic pen. Furthermore, there is also an overlapping area between adjacent first induction coils and second induction coils.

[0038] In some embodiments, such as Figure 5 and Figure 6As shown, the number of turns of the first winding portion 113 and the second winding portion 123 is greater than or equal to 1. It can be seen that as the number of turns of the winding portion in the corresponding electromagnetic induction coil increases, the magnetic field generated by the corresponding electromagnetic induction coil becomes stronger. Specifically, the sensing area enclosed by the first electromagnetic induction coil 11 is the first sensing area, and the sensing area enclosed by the second electromagnetic induction coil 12 is the second sensing area. The first winding portion 113 has 2 turns around the first sensing area, and the second winding portion 123 has 2 turns around the second sensing area. It can be seen that as the magnetic field of the electromagnetic induction coil strengthens, the sensing accuracy of the electromagnetic pen also increases.

[0039] In some embodiments, such as Figure 4 As shown, the non-display area further includes a third non-display area and a fourth non-display area disposed opposite to each other in the second direction Y. The second direction intersects with the first direction. In this embodiment, the third non-display area corresponds to the lower edge of the display panel 3, and the fourth display area AA corresponds to the upper edge of the display panel 3. The electromagnetic induction coil further includes a plurality of third electromagnetic induction coils 13, which are respectively disposed intersecting with the first electromagnetic induction coil 11 and the second electromagnetic induction coil 12.

[0040] Specifically, multiple third electromagnetic induction coils 13 extend along the second direction Y and are arranged along the first direction X. Each third electromagnetic induction coil 13 includes a third lead and a third winding portion 133. The third lead includes a third input lead 131 and a third output lead 132. One end of the third winding portion 133 is electrically connected to the third input lead 131, and the other end is electrically connected to the third output lead 132. The third input lead 131 is electrically connected to a corresponding third induction signal input terminal, and the third output lead 132 is electrically connected to a corresponding third induction signal output terminal. Both the third input lead 131 and the third output lead 132 are located in the third non-display area, and at least a portion of the third winding portion 133 is located within the display area AA. When the third induction signal input terminal is energized, the corresponding third winding portion 133 generates a magnetic field, and the movement of the electromagnetic pen causes a change in the magnetic field.

[0041] In this embodiment, the first direction X is perpendicular to the second direction Y. The first direction X is relative to the horizontal direction of the display panel 3, and the second direction Y is relative to the vertical direction of the display panel 3. Therefore, the third sensing area enclosed by any of the third electromagnetic induction coils 13 is respectively intersected and partially overlapped with the first sensing area enclosed by any of the first electromagnetic induction coils 11 and the second sensing area enclosed by any of the second electromagnetic induction coils 12.

[0042] During the driving process of the electromagnetic induction coils, energizers can be sequentially applied to each of the first or second induction signal input terminals in the second direction Y, causing the corresponding first electromagnetic induction coil 11 or second electromagnetic induction coil 12 to generate a magnetic field. Similarly, energizers can be sequentially applied to each of the third induction signal input terminals in the first direction X, causing the corresponding third electromagnetic induction coil 13 to generate a magnetic field. It is worth noting that the first electromagnetic induction coil 11 and the second electromagnetic induction coil 12 are both considered as electromagnetic induction lines in the horizontal direction of the display panel 3, and the third electromagnetic induction coil 13 is considered as an electromagnetic induction line in the vertical direction of the display panel 3. Therefore, the specific selection order of each electromagnetic induction coil can be selected according to requirements. This is a common technique used by those skilled in the art and will not be elaborated here.

[0043] Furthermore, from the formula Φ=nBS, we know that Φ is the magnetic flux, n is the number of turns of the electromagnetic induction coil, B is the strength of the generated magnetic field, and S is the area enclosed by each electromagnetic induction coil. When multiple electromagnetic induction coils are distributed in the display area AA, the touch position of the electromagnetic pen can be sensed by sensing the change in magnetic flux within the sensing area enclosed by each electromagnetic induction coil.

[0044] Specifically, when the electromagnetic pen is used for touch control, the electromagnetic pen is brought close to the display panel 3, and the magnetic field generated by it causes the magnetic flux in each electromagnetic induction coil to change. Along the first direction X, the third electromagnetic induction coil 13 with the largest change in magnetic flux (i.e., induction intensity) can be sensed, and along the second direction Y, the first electromagnetic induction coil 11 or the second electromagnetic induction coil 12 with the largest change in magnetic flux can also be sensed. Therefore, the position where the first electromagnetic induction coil 11 / second electromagnetic induction coil 12 and the third electromagnetic induction coil 13 intersect and overlap is the touch position of the electromagnetic pen.

[0045] In one embodiment of the present invention, the driving circuit includes a first metal layer and a second metal layer (not shown in the figure). The first metal layer includes a source metal and a drain metal, and the second metal layer includes a gate metal. The first metal layer also includes a first electromagnetic induction coil 11 and a second electromagnetic induction coil 12. The second metal layer also includes a third electromagnetic induction coil 13. It is known that an insulating layer is provided between the first metal layer and the second metal layer. The first electromagnetic induction coil 11, the second electromagnetic induction coil 12 and the third electromagnetic induction coil 13 are arranged in layers to prevent short circuits.

[0046] An embodiment of the present invention also provides a display device, including the display panel 3 as described in any of the above embodiments. It is understood that the display device can be a device for displaying video or still images, including fixed terminals such as televisions, desktop computers, monitors, and billboards, and can also include mobile terminals such as mobile phones, tablet computers, mobile communication terminals, electronic notebooks, e-books, multimedia players, navigators, and laptops, and can also include wearable electronic devices such as smartwatches, smart glasses, virtual reality devices, and augmented reality devices.

[0047] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area surrounding the display area, the non-display area comprising a first non-display area and a second non-display area opposite to each other along a first direction; the display panel further includes: The driving circuit includes a first gate driving unit; and An electromagnetic induction coil includes a plurality of first electromagnetic induction coils, each first electromagnetic induction coil including a first lead and a first winding portion electrically connected to the first lead, at least a portion of the first winding portion being located within the display area; at least a portion of the first winding portion being located within a second non-display area, and the first winding portions of the plurality of first electromagnetic induction coils located within the second non-display area are all electrically connected to each other. The first gate driving unit is located in the second non-display area, and the first lead is located in the first non-display area, so that the space required for the left and right bezels in the display panel is consistent.

2. The display panel according to claim 1, characterized in that, The first lead includes a first input lead and a first output lead. The two ends of the first winding portion are electrically connected to the first input lead and the first output lead, respectively. Both the first input lead and the first output lead are located in the first non-display area.

3. The display panel according to claim 2, characterized in that, The first winding portions of the plurality of first electromagnetic induction coils are electrically connected within the second non-display area.

4. The display panel according to claim 3, characterized in that, The driving circuit further includes a second gate driving unit; The electromagnetic induction coil also includes a plurality of second electromagnetic induction coils. The second electromagnetic induction coil includes a second lead and a second winding portion. The second lead includes a second input lead and a second output lead. The second winding portion is electrically connected to the second input lead and the second output lead respectively. At least a portion of the second winding portion is located within the display area. The second gate driving unit is located in the first non-display area, and the second input lead and the second output lead are both located in the second non-display area.

5. The display panel according to claim 4, characterized in that, There are overlapping areas between two adjacent first electromagnetic induction coils and between two adjacent second electromagnetic induction coils.

6. The display panel according to claim 5, characterized in that, There is an overlapping area between the adjacent first electromagnetic induction coil and the second electromagnetic induction coil.

7. The display panel according to claim 4, characterized in that, The number of turns in both the first winding section and the second winding section is greater than or equal to 1.

8. The display panel according to claim 4, characterized in that, The non-display area also includes a third non-display area and a fourth non-display area disposed opposite to each other in the second direction, the second direction intersecting the first direction, and the electromagnetic induction coil also includes a plurality of third electromagnetic induction coils, the third electromagnetic induction coils being disposed intersecting with the first electromagnetic induction coil and the second electromagnetic induction coil respectively.

9. The display panel according to claim 8, characterized in that, The driving circuit includes a first metal layer and a second metal layer. The first metal layer includes a source metal and a drain metal, and the second metal layer includes a gate metal. The first metal layer also includes a first electromagnetic induction coil and a second electromagnetic induction coil, and the second metal layer also includes the third electromagnetic induction coil.

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

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