Display panel and display device

Abstract

The application discloses a display panel and a display device, and relates to the technical field of display, and comprises a substrate and heating wires arranged on one side of the substrate; a display area is provided with a plurality of pixel units arranged in an array along a first direction and a second direction, each pixel unit comprises at least two sub-pixels, the sub-pixels in the same pixel unit are arranged along the first direction, and the first direction intersects with the second direction; the heating wires comprise a plurality of heating branches, and adjacent heating branches along the first direction or the second direction are electrically connected through connecting portions; the heating branch comprises at least two parallel heating branch lines; the orthogonal projection of the heating branch line in the same heating branch on the plane of the display panel overlaps with the orthogonal projection of at least one sub-pixel on the plane of the display panel; wherein at least part of the line segments in the heating branch line are located in an opening area, and the connecting portion is located in a non-opening area. In this way, the heating uniformity in the sub-pixel unit is improved, and the display effect is improved.

Description

Technical Field

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

[0002] Liquid crystal is a special state of matter that possesses both the birefringence characteristic of crystals and the fluidity of liquids. Liquid crystal displays (LCDs) are display devices made by changing the optical properties of liquid crystal molecules under the influence of an external electric field. They come in various types and are currently widely used in various displays and electronic instruments. However, due to limitations in liquid crystal materials, the response time increases at low temperatures. This increased response time leads to deterioration in image quality, causing problems such as trailing and ghosting in dynamic images, affecting the visual experience. When the temperature drops further (below -30℃), the alignment layer of the display is damaged, the liquid crystal state disappears, and it becomes a crystal, losing its liquid crystal properties, and the image cannot be displayed.

[0003] To solve the above problems, heating elements are introduced into the display panel to heat the liquid crystal, but uneven heating is a common problem. Summary of the Invention

[0004] In view of this, the present invention provides a display panel and a display device for improving heating uniformity in sub-pixel units.

[0005] In a first aspect, the present invention provides a display panel having a display area and a non-display area, the display area including an opening area and a non-opening area, comprising: a substrate and a heating trace disposed on one side of the substrate;

[0006] The display area is provided with a plurality of pixel units arranged in an array along a first direction and a second direction. Each pixel unit includes at least two sub-pixels. The sub-pixels in the same pixel unit are arranged along the first direction, and the first direction and the second direction intersect.

[0007] The heating trace includes multiple heating branches, and adjacent heating branches along the first direction or the second direction are electrically connected by a connecting part; the heating branch includes at least two parallel heating branches; the orthographic projection of the heating branch in the same heating branch onto the plane where the display panel is located overlaps with the orthographic projection of at least one sub-pixel onto the plane where the display panel is located.

[0008] Wherein, at least a portion of the heating branch line is located in the opening area, and the connecting portion is located in the non-opening area.

[0009] In a second aspect, the present invention provides a display device including the display panel provided in the first aspect of the present invention.

[0010] Compared with the prior art, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0011] The display panel and display device provided by this invention include a display area with an array of multiple pixel units, each pixel unit comprising at least two sub-pixels arranged along a first direction. Simultaneously, heating traces are introduced into the display panel, each heating trace comprising multiple heating branches. Each heating branch includes at least two parallel heating lines, and adjacent heating branches are electrically connected via a connecting portion. The orthographic projection of the same heating branch onto the plane of the display panel overlaps with the orthographic projection of at least one sub-pixel onto the plane of the display panel. At least a portion of the heating branches is located in an open area, and the connecting portion connecting adjacent heating branches is located in a non-open area. Thus, the same pixel unit can be heated by at least two heating lines within the same heating branch. Compared to the method of heating pixel units using a single heating line in related technologies, this avoids the problem of uneven heating and display unevenness caused by severely localized heating of the pixel unit. Therefore, the method of heating pixel units using at least two heating lines in this invention effectively improves the heating uniformity of the pixel unit, thereby improving the display effect of the display panel and display device in low-temperature environments.

[0012] Of course, any product implementing this invention need not necessarily achieve all of the technical effects described above at the same time.

[0013] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0015] Figure 1 The image shown is a top view of a display panel provided in an embodiment of the present invention;

[0016] Figure 2 The diagram shows a connection between the heating support and the connecting part.

[0017] Figure 3 The diagram shown illustrates the relative positional relationship between pixel units and heating traces in a display panel provided by an embodiment of the present invention.

[0018] Figure 4 The image shown is another top view of the display panel provided in an embodiment of the present invention;

[0019] Figure 5 As shown Figure 4A cross-sectional view of the display panel along the AA direction;

[0020] Figure 6 As shown Figure 4 Another AA-axis cross-sectional view of the central display panel;

[0021] Figure 7 The diagram shows a relative positional relationship between the pixel electrode and the heating branch.

[0022] Figure 8 As shown Figure 7 A BB-direction cross-section diagram;

[0023] Figure 9 The diagram shows another relative positional relationship between the pixel electrode and the heating branch.

[0024] Figure 10 As shown Figure 9 A CC-direction cross-sectional view;

[0025] Figure 11 The image shown is another top view of the display panel provided in an embodiment of the present invention;

[0026] Figure 12 The diagram shows a connection between the heating support and the connecting part.

[0027] Figure 13 The diagram shows a relative positional relationship between the heating element and different color sub-pixels in the pixel unit.

[0028] Figure 14 The diagram shows a layout of different heating branches within the same heating section.

[0029] Figure 15 The diagram shows a relative positional relationship between the pixel electrode and the heating branch.

[0030] Figure 16 As shown Figure 15 A DD-direction cross-sectional view;

[0031] Figure 17 The diagram shown is a schematic diagram of a connection between a pixel electrode and a transistor in the driving layer in an embodiment of the present invention.

[0032] Figure 18 As shown Figure 4 Another AA-axis cross-sectional view of the central display panel;

[0033] Figure 19 As shown Figure 4 Another AA-axis cross-sectional view of the central display panel;

[0034] Figure 20The diagram shown is a structural schematic of a display device provided in an embodiment of the present invention. Detailed Implementation

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0038] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0039] Various modifications and variations can be made to this invention without departing from its spirit or scope, as will be apparent to those skilled in the art. Therefore, this invention is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this invention can be combined with each other without contradiction.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0041] Figure 1 The image shown is a top view of a display panel provided in an embodiment of the present invention. Figure 2 The diagram shown illustrates one possible connection between the heating support and the connecting part. Figure 3 The diagram shown illustrates the relative positional relationship between pixel units and heating traces in a display panel provided by an embodiment of the present invention.

[0042] Please refer to Figure 1 and Figure 2 This invention provides a display panel 100, which is provided with a display area A1 and a non-display area A2. The display area A1 includes an opening area A11 and a non-opening area A12. The display panel 100 includes a substrate 01 and a heating trace 00 disposed on one side of the substrate 01.

[0043] Display area A1 is provided with a plurality of pixel units P0 arranged in an array along the first direction F1 and the second direction F2. Each pixel unit P0 includes at least two sub-pixels P. The sub-pixels P in the same pixel unit P0 are arranged along the first direction F1, and the first direction F1 and the second direction F2 intersect.

[0044] The heating trace 00 includes multiple heating branches 10, and adjacent heating branches 10 along the first direction F1 or the second direction F2 are electrically connected by a connecting part 20; the heating branch 10 includes at least two parallel heating branches 11; the orthographic projection of the heating branch 11 in the same heating branch 10 onto the plane where the display panel is located overlaps with the orthographic projection of at least one sub-pixel P onto the plane where the display panel is located.

[0045] At least a portion of the heating branch line 11 is located in the open area A11, and the connecting portion 20 is located in the non-open area A12.

[0046] It should be noted that, Figure 1 The illustration uses only a rectangular display panel as an example and does not limit the shape of the display panel. In some other embodiments of the present invention, the shape of the display panel may also be other, such as a rounded rectangle, a circle or other feasible shapes. Figure 1 The illustration only shows one arrangement of pixel units P0 contained in the display panel, and does not limit the number, shape and size of the actual pixel units P0 contained in the display panel.

[0047] It should also be noted that, Figure 1 This description only uses the example of each heating branch 10 comprising two parallel heating branches 11, and does not limit the actual number of heating branches 11 included in the heating branch 10. In some other embodiments of the present invention, the same heating branch 10 may also include three or more heating branches 11, for example, please refer to Figure 2 and Figure 3 The number of heating branches 11 included in the heating branch 10 corresponding to different pixel units P0 may be the same or different, and the present invention does not specifically limit this.

[0048] Optionally, the display panel provided in this embodiment of the invention is a liquid crystal display panel. This embodiment of the invention introduces heating traces 00 into the display panel, which can heat the display panel in low-temperature environments, enabling the display panel to function in low-temperature environments.

[0049] In the display panel provided in this embodiment of the invention, the display area A1 includes an open area A11 and a non-open area A12. Optionally, a black matrix is ​​provided in the display panel. The non-open area A12 refers to the area blocked by the black matrix BM, and the open area A11 refers to the area where light can pass through without being blocked by the black matrix BM.

[0050] Continue to refer to Figures 1 to 3 In the display panel provided in this embodiment of the invention, the display area A1 is provided with a plurality of pixel units P0 arranged in an array, and each pixel unit P0 includes at least two sub-pixels P arranged along the first direction F1. This embodiment of the invention uses the example of a pixel unit P0 including three sub-pixels P for illustration, but does not limit the actual number of sub-pixels P included in the pixel unit P0. In some other embodiments of the invention, the same pixel unit P0 may also include more than three sub-pixels. This embodiment of the invention introduces a heating trace 00 in the display panel. The heating trace 00 includes a plurality of heating branches 10. Each heating branch 10 includes at least two parallel heating branches 11. Adjacent heating branches 10 are electrically connected by a connecting portion 20. The orthographic projection of the same heating branch 10 onto the plane of the display panel overlaps with the orthographic projection of at least one sub-pixel P onto the plane of the display panel. At least a portion of the heating branches 11 is located in the opening area A11, and the connecting portion 20 connecting two adjacent heating branches 10 is located in the non-opening area A12. In this way, the same pixel unit P0 can be heated by at least two heating branches 11 in the same heating branch 10. Compared with the method of heating the pixel unit P0 by a single heating line in the related technology, it avoids the problem of uneven heating of the pixel unit P0 and the resulting display unevenness. Therefore, the present invention adopts the method of heating the pixel unit P0 by at least two heating branches 11, which effectively improves the heating uniformity of the pixel unit P0, thus helping to improve the display effect of the display panel and display device in low temperature environment.

[0051] Furthermore, in this embodiment of the invention, adjacent heating branches 10 are connected by a connecting portion 20, and each heating branch 11 in the heating branch 10 is essentially connected in parallel, which reduces the overall impedance of the heating trace 00. When the heating voltage supplied to the heating trace 00 is constant, the heating current transmitted on the heating trace 00 can be increased due to the reduced impedance of the heating trace 00, thereby improving the heating effect.

[0052] Furthermore, in this embodiment of the invention, at least a portion of the heating branch lines 11 in the heating branch 10 are disposed in the open area, while the connecting portion 20 is disposed in the non-open area, which is equivalent to reducing the area of ​​the heating traces in the non-open area. Since some signal lines are usually disposed in the non-open area, when the area of ​​the heating traces in the non-open area is reduced, it is beneficial to reduce the coupling capacitance between the heating traces and the signal lines in the non-open area, thereby improving the stability and accuracy of signal transmission in other signal lines in the display panel.

[0053] Figure 4 The image shown is another top view of the display panel provided in an embodiment of the present invention. Figure 5 As shown Figure 4 A cross-sectional view along the AA direction of a display panel. Optionally, the display panel includes a first substrate 101 and a second substrate 102 disposed opposite to each other, wherein the first substrate 101 is an array substrate and the second substrate 102 is a color filter substrate.

[0054] Please refer to Figure 4 and Figure 5 In an optional embodiment of the present invention, the display panel further includes multiple scan lines SL and multiple data lines DL located in the non-opening area A12. The scan lines SL and data lines DL are arranged intersectingly, and at least some of the heating branches 11 do not overlap with the orthographic projections of the scan lines SL and data lines DL on the display panel.

[0055] Specifically, in this embodiment of the invention, the scan line SL and data line DL introduced into the display panel are located in the non-opening area A12. That is, the orthogonal projection of the scan line SL and data line DL onto the plane of the display panel is blocked by a black matrix. When the heating branch 10 and the connecting part 20 are introduced into the display panel together in this application, most of the heating branch lines 11 in the heating branch 10 are located in the opening area A11, and the connecting part 20 is located in the non-opening area A12. That is, among the heating traces 00 located in the display area A1, only the connecting part 20 or the connecting part 20 and a small portion of the heating branch lines 11 are located in the non-opening area A12. Most of the heating branches 11 are located in the opening area A11. The orthographic projection of these heating branches 11 on the display panel does not overlap with the data lines DL and scan lines SL in the non-opening area A12. Only the connecting part 20 or a small part of the heating branches 11 may overlap with the data lines DL or scan lines SL. This arrangement is equivalent to reducing the overlap area between the heating trace 00 and the scan lines SL and data lines DL. Since the heating trace 00 transmits heating signals, the scan line SL transmits scanning signals, and the data line DL transmits data signals, when the orthographic projection of the heating trace 00 overlaps with the scan line SL or the data line DL on the display panel, a coupling capacitor will be formed between the heating trace 00 and the scan line SL or the heating trace 00 and the data line DL, affecting the accuracy of the signals transmitted on the scan line SL or the data line DL. Therefore, in this embodiment of the invention, when introducing the heating trace 00, minimizing the overlap area between the heating trace 00 and the scan line SL or data line DL is beneficial to reducing the coupling capacitance between the heating trace 00 and the scan line SL or data line DL, thereby improving the accuracy and stability of the signal transmitted on the scan line SL or data line DL.

[0056] Figure 6 As shown Figure 4 Another AA-axis cross-sectional view of the display panel. Figure 5 and Figure 6 Two feasible configurations for the common electrode T2 and pixel electrode T1 in the display panel are shown respectively. Figure 5 In the illustrated embodiment, the common electrode T2 is disposed on the side of the pixel electrode T1 facing the substrate. Figure 6 In the illustrated embodiment, the pixel electrode T1 is disposed on the side of the common electrode T2 facing the substrate.

[0057] Please refer to 5 and Figure 6 and combined Figure 4In an optional embodiment of the present invention, the sub-pixel P includes a pixel electrode T1, and the display panel further includes a common electrode T2; the heating branch line 11 is located on the side of the pixel electrode T1 and the common electrode T2 facing the substrate, and the orthographic projection of the heating branch line 11 on the plane of the display panel overlaps with the orthographic projection of the pixel electrode T1 and the common electrode T2 that is closer to the substrate on the plane of the display panel.

[0058] Specifically, when a heating trace 00 is introduced into the display panel, the heating branch 11 in the heating branch 10 is located on the side of the common electrode T2 and the pixel electrode T1 facing the substrate. When the common electrode T2 is located on the side of the pixel electrode T1 facing the substrate, the orthographic projection of the heating branch 11 onto the plane of the display panel overlaps with the orthographic projection of the common electrode T2 onto the plane of the display panel. Thus, it is equivalent to using the common electrode T2 to at least partially block the heating branch 11, which helps to reduce the problem of the heating branch 11 being visible when it is introduced into the display area A1. At the same time, the common electrode T2 can also play the role of electric field shielding, preventing the introduction of the heating branch 11 from affecting the normal display of the display panel. When the pixel electrode T1 is located on the side of the common electrode T2 facing the substrate, the orthographic projection of the heating branch line 11 on the plane of the display panel overlaps with the orthographic projection of the pixel electrode T1 on the plane of the display panel. In this way, the pixel electrode T1 is used to at least partially block the heating branch line 11, which helps to reduce the problem that the heating branch line 11 may be visible when it is introduced into the display area A1. At the same time, the pixel electrode T1 can also play a role in electric field shielding to a certain extent, reducing the impact of the electric field of the heating trace on the normal display of the display panel.

[0059] Continue to refer to Figure 5 and Figure 6 In an optional embodiment of the present invention, the orthographic projection of the heating branch 11 onto the plane where the display panel is located is within the orthographic projection range of the pixel electrode T1 and the common electrode T2 that is closer to the substrate onto the plane where the display panel is located.

[0060] When the common electrode T2 is located on the side of the pixel electrode T1 facing the substrate, the orthographic projection of the heating branch line 11 on the plane of the display panel is within the orthographic projection range of the common electrode T2 on the plane of the display panel. In this way, the heating branch line 11 is effectively shielded by the common electrode T2, which helps to avoid the problem of the heating branch line 11 being visible when it is introduced into the display area A1. At the same time, the common electrode T2 can also play a better role in electric field shielding.

[0061] When the pixel electrode T1 is located on the side of the common electrode T2 facing the substrate, the orthographic projection of the heating branch line 11 on the plane of the display panel is within the orthographic projection range of the pixel electrode T1 on the plane of the display panel. In this way, the pixel electrode T1 is used to block the heating branch line 11, which helps to avoid the problem that the heating branch line 11 may be visible when it is introduced into the display area A1. At the same time, the pixel electrode T1 can also play a better role in electric field shielding.

[0062] Figure 7 The diagram shows a relative positional relationship between pixel electrode T1 and heating branch 11. Figure 8 As shown Figure 7 A BB-direction cross-sectional view is provided. This embodiment uses a pixel electrode T1 including multiple electrode strips T11 as an example for illustration, but does not limit the actual number of electrode strips T11 contained in a single pixel electrode T1.

[0063] Please refer to Figure 7 and Figure 8 In an optional embodiment of the present invention, the pixel electrode T1 is located on the side of the common electrode T2 facing the substrate O1. The pixel electrode T1 includes a plurality of electrode strips T11, and the orthographic projection of the heating branch line 11 on the plane where the display panel is located is within the orthographic projection range of the electrode strip T11 on the plane where the display panel is located.

[0064] Specifically, please combine Figure 7 and Figure 8 When the heating branch 10 is introduced into the display area A1, the heating branch line 11 in the heating branch 10 can be correspondingly set with the electrode strip T11 in the pixel electrode T1. For example, the approximate extension direction of the heating branch line 11 is the same as the approximate extension direction of the electrode strip T11 in the pixel electrode T1. In this way, the heating branch line 11 can be hidden directly below the electrode strip T11, that is, the orthographic projection of the heating branch line 11 on the plane where the display panel is located is within the orthographic projection range of the electrode strip T11 on the plane where the display panel is located. When observing the display panel from the light-emitting surface of the display panel, since the heating branch line 11 is hidden under the electrode strip T11, the observer cannot observe the introduction of the heating branch line 11. Therefore, the problem of the heating branch line 11 being visible when it is introduced into the display panel is effectively avoided. Thus, while achieving uniform heating of the pixel unit P0 of the display panel, it is also beneficial to ensure the display effect of the display panel. In addition, when the orthographic projection of the heating branch line 11 on the plane of the display panel is set within the orthographic projection range of the electrode strip T11 on the plane of the display panel, the pixel electrode T1 can be used to shield the electric field between the heating branch line 11 and the common electrode T2, so as to avoid the electric field from affecting the normal display of the display panel.

[0065] It should be noted that, Figure 7The embodiments only illustrate the pixel electrode T1 by taking a scheme in which the pixel electrode T1 includes multiple electrode strips T11 as an example, but do not limit the actual structure of the pixel electrode T1. In some other embodiments of the present invention, the pixel electrode T1 may also be embodied as a block structure, etc.

[0066] Figure 7 The illustrated embodiment shows a scheme where the extending direction of the heating branch line 11 in the heating support 10 is approximately the same as the extending direction of the electrode strip T11 in the pixel electrode T1. However, this does not limit the specific structure of the heating support 10 and the heating branch line 11. In some other embodiments of the present invention, when the pixel electrode T1 includes multiple electrode strips T11, the extending direction of the heating branch line 11 may also intersect with the extending direction of the electrode strip T11. For example, please refer to... Figure 9 and Figure 10 , Figure 9 The diagram shows another relative positional relationship between pixel electrode T1 and heating branch 11. Figure 10 As shown Figure 9 A CC-direction cross-section. For Figure 9 In the illustrated scheme, since the extending direction of the electrode strip T11 in the pixel electrode T1 intersects with the extending direction of the heating branch line 11, it is impossible to hide the heating branch line 11 directly below the electrode strip T11. Therefore, in an optional embodiment of the present invention, please refer to... Figure 9 and Figure 10 The common electrode T2 is located on the side of the pixel electrode T1 facing the substrate 01, and the orthographic projection of the heating branch line 11 on the plane where the display panel is located is within the orthographic projection range of the common electrode T2 on the plane where the display panel is located.

[0067] Even if the extending direction of the heating branch line 11 intersects with the extending direction of the pixel strip of the pixel electrode T1, when the common electrode T2 is positioned on the side of the pixel electrode T1 facing the substrate, the heating branch line 11 can still be positioned directly below the common electrode T2. The common electrode T2 can then shield the heating branch line 11, thus helping to avoid the problem of the heating branch line 11 being visible. Furthermore, when the orthographic projection of the heating branch line 11 onto the plane of the display panel is positioned within the orthographic projection range of the common electrode T2 onto the plane of the display panel, the common electrode T2 can also be used to shield the electric field formed between the heating branch line 11 and the common electrode T2, preventing this electric field from affecting the normal display of the display panel.

[0068] Please refer to Figure 1 or Figure 4 In an optional embodiment of the present invention, the orthographic projection of the same heating support 10 onto the plane of the display panel overlaps with the orthographic projection of a sub-pixel P onto the plane of the display panel; or, please refer to Figure 11The orthographic projection of the same heating element 10 onto the plane of the display panel overlaps with the orthographic projection of at least one pixel unit P0 onto the plane of the display panel, wherein, Figure 11 The image shown is another top view of the display panel provided in an embodiment of the present invention.

[0069] Specifically, please refer to Figure 1 or Figure 4 When multiple heating branches 10 are introduced into the display area A1, each heating branch 10 can be configured in a one-to-one correspondence with a sub-pixel P. That is, one heating branch 10 corresponds to the area where one sub-pixel P is located for heating. In this way, each sub-pixel P has a corresponding heating branch 10 for heating, which helps to improve the heating uniformity of the areas corresponding to different sub-pixels P. Optionally, the heating branches 10 corresponding to different sub-pixels P contain the same number of heating branches 11. When different heating branches 10 are formed using the same number of heating branches 11, there is no need to differentiate the design of different branches, which also helps to simplify the manufacturing process of the heating traces 00. In addition, the method of configuring the heating branches 10 in a one-to-one correspondence with the sub-pixels P can also reduce the area of ​​the heating traces set in the non-opening area, thereby reducing the coupling capacitance between the heating traces and other signal lines in the non-opening area, which helps to improve the signal transmission stability and accuracy of other signal lines in the display panel.

[0070] Please refer to Figure 11 When multiple heating branches 10 are introduced into the display area A1, each heating branch 10 can be configured to correspond one-to-one with a pixel unit P0. When the same pixel unit P0 includes three sub-pixels P, the same heating branch 10 can heat all three sub-pixels P in the same pixel unit P0 simultaneously. This helps to improve the heating uniformity of the areas corresponding to different pixel units P0. In addition, when a heating branch 10 heats each sub-pixel P in a pixel unit P0, the orthographic projection of the same heating branch line 11 onto the plane of the display panel will intersect with each sub-pixel P in the pixel unit P0. Therefore, the length of the heating branch line 11 in the heating branch 10 can be extended to a certain extent, which helps to increase the size of the heating branch 10. This simplifies the manufacturing difficulty of the heating branch 10 and improves the manufacturing efficiency of the display panel.

[0071] Please refer to Figure 1 , Figure 4 and Figure 11 In one optional embodiment of the present invention, the number of heating branches 11 included in the same heating branch 10 is n, where 2≤n≤5.

[0072] Specifically, the more heating branches 11 included in the same heating branch 10, the more evenly these heating branches 11 can be arranged, thereby achieving more uniform heating of the sub-pixel P and improving the overall heating uniformity of the display panel. However, if the number of heating branches 11 included in the same heating branch 10 is too large, for example, more than 5, it may have a significant impact on the aperture ratio of the sub-pixel P, and thus a significant impact on the overall aperture ratio loss of the display panel. Conversely, if the number of heating branches 11 included in the heating branch 10 is small, for example, if the heating branch 10 includes only one heating branch 11, the heating difference between the area of ​​the sub-pixel P that overlaps with the heating branch 11 and the area of ​​the sub-pixel P that is far away from the heating branch 11 is large, causing uneven heating within the sub-pixel P. Therefore, when the number of heating branches 11 included in the same heating branch 10 is set to between 2 and 5 in the embodiments of the present invention, the heating uniformity of the heating branch 10 on the sub-pixel P can be improved by arranging the branches in the area corresponding to the sub-pixel P, and the problem of large aperture ratio loss caused by introducing too many heating branches 11 in the same heating branch 10 can be avoided, thereby helping to ensure the overall aperture ratio of the display panel.

[0073] Optionally, the number of heating branches 11 included in the same heating branch 10 is n=3 or n=4, which can be flexibly adjusted according to actual needs. The present invention does not impose a specific limitation on this.

[0074] Figure 12 The diagram shows a connection between the heating support 10 and the connecting part 20.

[0075] Please refer to Figure 12 In an optional embodiment of the present invention, in the same heating branch 10, the total line width of each heating branch 11 is D0; the line width of the connecting part 20 is D1, wherein D0 < D1.

[0076] Specifically, in this embodiment of the invention, adjacent heating branches 10 are connected by a connecting portion 20, and the heating branches 11 in the heating branches 10 are essentially connected in parallel, which reduces the overall impedance of the heating traces 00. When the heating voltage supplied to the heating traces 00 is constant, the heating current transmitted on the heating traces 00 can be increased due to the reduced impedance of the heating traces 00, thereby improving the heating effect. In this embodiment, when the total linewidth D0 of the heating branches 11 in the same heating branch 10 is set to be less than the linewidth of the connecting portion 20, the impedance of each heating branch 11 will be larger. When the same current flows through the heating branch 11 with larger impedance, the heat generated by the heating branch 11 will be larger. Similarly, since the linewidth of the connecting portion 20 is larger, its impedance will be smaller, and when the same current flows through the connecting portion 20, the heat generated by the connecting portion 20 will be smaller. Since the heating branch 11 is used to heat the sub-pixel P in the opening area A11, and the connecting part 20 is located in the non-opening area A12, it hardly plays a role in heating the sub-pixel P. Therefore, the above design of the embodiment of the present invention is equivalent to increasing the heat dissipated by the heating trace 00 of the heating branch 10, so that more heat generated by the heating trace 00 is concentrated in the opening area A11 corresponding to the sub-pixel P. Therefore, while improving the heating effect on the sub-pixel P, it is also beneficial to improve the effective utilization rate of the heat generated by the heating trace 00.

[0077] Continue to refer to Figure 12 In one optional embodiment of the present invention, the line widths of the heating branches 11 in the same heating branch 10 are equal.

[0078] When the line widths of different heating branches 11 in the same heating branch 10 are set to be equal, there is no need to design different sizes for the different heating branches 11 in the same heating branch 10. This helps to reduce the manufacturing difficulty of the heating branch 10 and thus improves the manufacturing efficiency of the heating trace 00.

[0079] Figure 13 The diagram shows a relative positional relationship between the heating support 10 and different color sub-pixels P in the pixel unit P0.

[0080] Please refer to Figure 13 In an optional embodiment of the present invention, the sub-pixel P includes a green sub-pixel P1 and a blue sub-pixel P2. The number of heating branches 11 included in the heating branch 10 corresponding to the green sub-pixel P1 is n1, and the number of heating branches 11 included in the heating branch 10 corresponding to the blue sub-pixel P2 is n2, where n1 < n2.

[0081] Specifically, this embodiment illustrates a design where the heating support 10 corresponds one-to-one with the sub-pixels P. When the sub-pixels P in pixel unit P0 include green sub-pixels P1 and blue sub-pixels P2, this embodiment illustrates a design that differentiates the heating support 10 corresponding to the green sub-pixels P1 and blue sub-pixels P2. When the sub-pixels P in the display panel include green sub-pixels P1 and blue sub-pixels P2, during the display process, the green sub-pixels P1 contributes more to the brightness of the display panel, while the blue sub-pixels P2 contribute less. In other words, the brightness of the display panel largely depends on the aperture ratio corresponding to the green sub-pixels P1. When the heating branch 10 includes at least two heating branches 11, the number n1 of heating branches 11 included in the heating branch 10 corresponding to the green sub-pixel P1 can be set to be smaller than the number n2 of heating branches 11 included in the heating branch 10 corresponding to the blue sub-pixel P2, thereby reducing the occlusion area of ​​the opening area of ​​the green sub-pixel P1 by the heating branches 11, and avoiding or minimizing the impact on the overall brightness of the display panel when the heating branch 10 is introduced into the display panel. Figure 13 The illustrated embodiment uses n1=2 and n2=3 as examples for explanation, but does not limit the specific values ​​of n1 and n2.

[0082] Optionally, the sub-pixel P also includes a red sub-pixel P3. The contribution of the red sub-pixel P3 to the brightness of the display panel is between that of the green sub-pixel P1 and the blue sub-pixel P2. When different heating branches 10 are introduced for heating the sub-pixel P, the number of heating branches 11 included in the heating branch 10 corresponding to the red sub-pixel P3 is n3. Optionally, n1 < n2 ≤ n3. In this way, uniform heating of the red sub-pixel P3 can be achieved without affecting the overall brightness of the display panel.

[0083] Figure 14 The diagram shows a layout of different heating branches 11 in the same heating branch 10.

[0084] Please refer to Figure 14 In an optional embodiment of the present invention, in the same heating branch 10, the heating branch 11 includes a first heating branch 111 and a second heating branch 112. The first heating branch 111 is located on the side of the second heating branch 112 away from the geometric center of the sub-pixel P. The line width D01 of the second heating branch 112 is smaller than the line width D02 of the first heating branch 111.

[0085] Specifically, Figure 14The illustrated embodiment includes three heating branches 11 within the same heating section 10. Among these three heating branches 11, the second heating branch 112 is located at or near the center of sub-pixel P, and the first heating branch 111 can be considered as heating branches 11 located on either side of the second heating branch 112. In some optional embodiments, during the display process, the position of sub-pixel P near its geometric center contributes significantly to the display accuracy. In low-temperature environments, if the liquid crystal near the geometric center experiences a longer response time due to low temperature, the impact on the display effect will be more pronounced. Therefore, in this embodiment, the linewidth of the second heating branch 112 near the geometric center of sub-pixel P is set to be smaller, thereby increasing the impedance of the second heating branch 112. When the same current flows through the first heating branch 111 and the second heating branch 112, more heat will be generated on the second heating branch 112, which is more conducive to reducing or avoiding the impact of low temperature on the liquid crystal in the area surrounding the geometric center of sub-pixel P, ensuring the stability of the liquid crystal performance in this area.

[0086] Figure 15 The diagram shows a relative positional relationship between pixel electrode T1 and heating branch 11. This embodiment uses five heating branches in the same heating branch 10 as an example for illustration. Figure 16 As shown Figure 15 A DD-direction cross-sectional view showing some of the film layers other than the pixel electrode T1 and the heating branch 10.

[0087] Please refer to Figure 15 and Figure 16 In an optional embodiment of the present invention, the display panel further includes a black matrix BM, and in the same heating branch 10, at least a portion of the heating branch 11 overlaps with the orthographic projection of the black matrix BM on the plane of the display panel.

[0088] In this embodiment of the invention, the non-aperture area refers to the area blocked by the aforementioned black matrix BM, and the aperture area refers to the area through which light can pass without being blocked by the aforementioned black matrix BM. When the same heating branch 10 includes multiple heating branches 11, in this embodiment, at least a portion of the heating branch 11 furthest from the geometric center of the pixel aperture is hidden directly below the black matrix BM. That is, the orthographic projection of this portion of the heating branch 11 onto the plane of the display panel overlaps with the orthographic projection of the black matrix BM onto the plane of the display panel. This portion of the heating branch 11 can also heat the liquid crystal in the area corresponding to the sub-pixel P, and at the same time, it can reduce the overlap area between the heating branch 11 and the aperture area A11, which is beneficial to reducing the area occupied by the heating branch 11 in the aperture area A11, thereby reducing the impact of the introduction of the heating branch 11 on the aperture ratio of the display panel.

[0089] In an optional embodiment of the present invention, the heating branch 10 comprises a transparent conductive material. Optionally, the heating branch 10 may comprise a transparent conductive material such as ITO or IZO. Thus, even if the heating branch 10 is disposed in the opening area A11 of the display panel, the heating branch line 11 in the heating branch 10 has a negligible impact on the aperture ratio of the display panel. Therefore, it is beneficial to ensure both the heating uniformity of the display panel and the aperture ratio of the display panel.

[0090] Figure 17 The diagram shown illustrates one connection between pixel electrode T1 and transistor T in the driving layer in an embodiment of the present invention. Figure 18 As shown Figure 4 Another AA-axis cross-sectional view of the display panel. Figure 19 As shown Figure 4 Another AA-axis cross-sectional view of the display panel. Figure 18 The illustrated embodiment shows a scheme in which the heating support 10 and the second metal layer M2 are disposed in the same layer. Figure 19 The embodiment shown illustrates a scheme in which the heating support 10 is disposed in the same layer as the first metal layer M1.

[0091] Please refer to Figures 17 to 19 and combined Figure 4 In an optional embodiment of the present invention, the display panel includes a driving layer 02, the driving layer 02 is provided with a plurality of transistors T, the driving layer 02 includes a first metal layer M1 and a second metal layer M2, the gate of the transistor T is located in the first metal layer M1, and the source and / or drain of the transistor T is located in the second metal layer M2; the heating branch 10 is located in the first metal layer M1, or the heating branch 10 is located in the second metal layer M2.

[0092] Specifically, when the heating support 10 is set in the first metal layer M1 or the second metal layer M2 in the display panel, there is no need to introduce a new film layer in the display panel to set the heating support 10. The existing film layer structure in the display panel can be reused. Therefore, it is beneficial to simplify the overall film layer structure of the display panel when the heating support 10 is introduced into the display panel, and the overall thickness of the display panel will not be increased.

[0093] In one optional embodiment of the present invention, appropriate reference is made. Figures 1 to 4 The connecting part 20 and the heating support 10 are arranged on the same layer. When the connecting part 20 and the heating support 10 are arranged on the same layer, the connecting part 20 can be manufactured at the same time as the heating support 10, without the need to introduce different manufacturing processes for the heating support 10 and the connecting part 20. This helps to simplify the manufacturing process of the heating support 10 and the connecting part 20 and improve the production efficiency of the display panel.

[0094] Please refer to Figure 4Optionally, the heating trace 00 also includes a heating bus 30 connected to the heating support 10. The heating bus 30 is located in the non-display area A2 of the display panel. By providing heating traces 00 to the two heating buses 30 in the non-display areas A2 on both sides of the display area A1, the heating signal can be transmitted to the heating support 10 to realize the heating function of the sub-pixel P. Optionally, the heating bus 30, the heating support 10, and the connecting part 20 are arranged in the same layer. In this way, the heating trace 00 can be fabricated in the same film layer and the same process, which helps to improve the production efficiency of the display panel.

[0095] Based on the same inventive concept, the present invention also provides a display device. Figure 20 The diagram shown is a structural schematic of a display device provided in an embodiment of the present invention. Please refer to it. Figure 20 The display device 200 includes the display panel 100 provided in the above embodiments of the present invention.

[0096] It is understood that the display device provided in the embodiments of the present invention can be other display devices with display functions, such as computers, mobile phones, and tablets, and the present invention does not impose specific limitations on them. The display device provided in the embodiments of the present invention has the beneficial effects of the display panel provided in the embodiments of the present invention. For details, please refer to the specific descriptions of the display panel in the above embodiments, which will not be repeated here.

[0097] As can be seen from the above embodiments, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0098] The display panel and display device provided by this invention include a display area with an array of multiple pixel units, each pixel unit comprising at least two sub-pixels arranged along a first direction. Simultaneously, heating traces are introduced into the display panel, each heating trace comprising multiple heating branches. Each heating branch includes at least two parallel heating lines, and adjacent heating branches are electrically connected via a connecting portion. The orthographic projection of the same heating branch onto the plane of the display panel overlaps with the orthographic projection of at least one sub-pixel onto the plane of the display panel. At least a portion of the heating branches is located in an open area, and the connecting portion connecting adjacent heating branches is located in a non-open area. Thus, the same pixel unit can be heated by at least two heating lines within the same heating branch. Compared to the method of heating pixel units using a single heating line in related technologies, this avoids the problem of uneven heating and display unevenness caused by severely localized heating of the pixel unit. Therefore, the method of heating pixel units using at least two heating lines in this invention effectively improves the heating uniformity of the pixel unit, thereby improving the display effect of the display panel and display device in low-temperature environments.

[0099] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, characterized by, The display panel comprises a substrate and a heating trace arranged on one side of the substrate, and is provided with a display area and a non-display area. The display area is provided with a plurality of pixel units arranged in a first direction and a second direction, each of the pixel units comprises at least two sub-pixels, the sub-pixels in the same pixel unit are arranged in the first direction, and the first direction intersects with the second direction. The heating trace comprises a plurality of heating branches, and the heating branches adjacent in the first direction or the second direction are electrically connected through a connecting portion; the heating branch comprises at least two parallel heating branch lines; the projection of the heating branch line in the same heating branch on the plane of the display panel overlaps with the projection of at least one sub-pixel on the plane of the display panel. At least part of the heating branch line is located in the opening area, and the connecting portion is located in the non-opening area. The sub-pixel comprises a pixel electrode, and the display panel further comprises a common electrode. The heating branch line is located on the side of the pixel electrode and the common electrode facing the substrate. The pixel electrode is located on the side of the common electrode facing the substrate, the pixel electrode comprises a plurality of electrode strips, and the projection of the heating branch line on the plane of the display panel is located in the projection range of the electrode strip on the plane of the display panel. In the same heating branch, the sum of the line widths of each heating branch line is DO; and the line width of the connecting portion is D1, wherein DO < D1.

2. The display panel of claim 1, wherein, The display panel further comprises a plurality of scanning lines and a plurality of data lines located in the non-opening area, the scanning lines and the data lines are arranged in a cross manner, and the projection of at least part of the heating branch line on the display panel does not overlap with the projection of the scanning line and the data line on the display panel.

3. The display panel of claim 1, wherein, The projection of the same heating branch on the plane of the display panel overlaps with the projection of one sub-pixel on the plane of the display panel; or the projection of the same heating branch on the plane of the display panel overlaps with the projection of at least one pixel unit on the plane of the display panel.

4. The display panel of claim 1, wherein, The number of heating branch lines contained in the same heating branch is n, and 2 ≤ n ≤ 5.

5. The display panel of claim 1, wherein, The line widths of the heating branch lines in the same heating branch are equal.

6. The display panel of claim 5, wherein, The sub-pixel comprises a green sub-pixel and a blue sub-pixel, the number of heating branch lines contained in the heating branch corresponding to the green sub-pixel is n1, the number of heating branch lines contained in the heating branch corresponding to the blue sub-pixel is n2, and n1 < n2.

7. The display panel of claim 1, wherein, The display panel further comprises a black matrix, and the projection of at least part of the heating branch line in the same heating branch on the plane of the display panel overlaps with the projection of the black matrix on the plane of the display panel.

8. The display panel of claim 1, wherein, The heating branch comprises a transparent conductive material.

9. The display panel of claim 1, wherein, The display panel comprises a driving layer provided with a plurality of transistors, the driving layer comprises a first metal layer and a second metal layer, the gate of the transistor is located on the first metal layer, and the source and / or drain of the transistor is located on the second metal layer. The heating branch is located in the first metal layer, or the heating branch is located in the second metal layer.

10. The display panel of claim 1, wherein, The connecting part is arranged in the same layer as the heating branch.

11. A display device comprising: The display panel comprises any one of claims 1-10.

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