Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device. A display panel comprises: a first display area and a second display area; the second display area is located in a first area of a display surface of the display panel. The second display area comprises a plurality of cathodes arranged in a preset pattern, a plurality of cathode removal areas, and at least two of the plurality of cathodes are connected in parallel; wherein the first area is an area opposite to an area where an optical functional element is arranged at the bottom of the display surface of the display panel. In this way, the resistance of the cathode can be reduced, the local voltage drop of the second display area can be avoided, and the problem of darkening of the second display area can be improved. At the same time, the transmittance of the second display area is improved, and the display effect of the display panel is ensured.

Description

Technical Field

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

[0002] With the continuous development of display devices, display panels are increasingly moving towards thinner, lighter, wider viewing angles, more flexible displays, and lower power consumption. Among these, the development of full-screen displays is gaining increasing popularity among users. In the process of developing full-screen displays, various methods such as notch screens, pop-up screens, waterdrop screens, and punch-hole screens have been used to continuously increase the screen-to-body ratio. However, these methods all sacrifice the display effect to some extent and are not true full-screen displays. Currently, completely hiding functional components such as cameras and light sensors under the display panel to maximize the screen-to-body ratio has become the mainstream approach.

[0003] Currently, in order to ensure the normal light sensitivity of functional devices and improve the transmittance of the area where the functional element is located, the cathode is usually patterned.

[0004] However, patterning the cathode, i.e. removing the cathode to form a cathode removal area, increases the cathode resistance, causing a significant voltage drop in local areas of the display panel. This results in the areas where the functional components are located in the display panel appearing darker, affecting the display effect of the display panel. Summary of the Invention

[0005] This invention provides a display panel and a display device to solve the problem of local dimming caused by significant local voltage drop in the display panel in related technologies.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide a display panel, the display panel comprising: a first display area and a second display area;

[0008] The second display area is located in the first area of ​​the display surface of the display panel;

[0009] The second display area includes multiple cathodes arranged in a preset pattern, multiple cathode removal areas, and at least two of the multiple cathodes are connected in parallel.

[0010] The first region is the region opposite to the region at the bottom of the display surface of the display panel where optical functional elements are disposed.

[0011] Optionally, the multiple cathodes included in the second display area are arranged in a mesh pattern.

[0012] Optionally, the second display area includes a first cathode and a second cathode;

[0013] The first cathode extends along the row direction of the pixel, and multiple first cathodes are arranged at equal intervals along the column direction of the pixel;

[0014] The second cathode and the first cathode are arranged intersectingly so that multiple first cathodes are connected in parallel.

[0015] Optionally, the angle between the first cathode and the second cathode is an acute angle.

[0016] Optionally, the angle between the first cathode and the second cathode is a right angle.

[0017] Optionally, the display panel further includes a substrate;

[0018] The cathode is disposed on the substrate, and a light emission adjustment structure is provided on the side of the cathode facing away from the substrate.

[0019] Optionally, the cathode is made of a metal or an alloy, and the light emission adjustment structure is made of a metal oxide; wherein the transmittance of the light emission adjustment structure is greater than the transmittance of the cathode.

[0020] Optionally, the display panel includes a plurality of pixel units;

[0021] Each pixel unit includes multiple sub-pixel units with different colors;

[0022] The cathode is equidistant from each of the adjacent sub-pixel units in the pixel unit; the cathodes are arranged in an array.

[0023] Optionally, each pixel unit includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit;

[0024] The red sub-pixel units and the green sub-pixel units are alternately spaced along the pixel row direction, and the red sub-pixel units and the green sub-pixel units are alternately spaced along the pixel column direction;

[0025] The blue sub-pixel unit is located between the green sub-pixel units and the red sub-pixel units, which are arranged in two alternating rows.

[0026] Optionally, the cathode is located between the red sub-pixel unit and the green sub-pixel unit that are adjacent upwards in the pixel column, or between the red sub-pixel unit and the green sub-pixel unit that are adjacent upwards in the pixel row.

[0027] Optionally, the blue sub-pixel unit is located in the gap between the green sub-pixel units and the red sub-pixel units that are alternately arranged in two adjacent rows.

[0028] Optionally, each pixel unit includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit;

[0029] Each pixel unit, comprising a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit, is arranged around the cathode, with the cathode offset from the blue sub-pixel unit.

[0030] Optionally, the second display area includes a central area and a peripheral area surrounding the central area;

[0031] The number of cathode removal zones located in the central region is greater than the number of cathode removal zones located in the peripheral region.

[0032] Optionally, the number of cathode removal zones increases sequentially from the peripheral region to the central region.

[0033] Optionally, within the second display area, the ratio between the area occupied by the cathode removal area and the area occupied by the cathode is between 0.1 and 1.

[0034] Optionally, the pixel density of the second display area is a preset multiple of that of the first display area, so that the transmittance of the second display area is greater than that of the first display area.

[0035] Optionally, the display panel may further include a third display area;

[0036] The third display area is located between the first display area and the second display area. The pixel density of the third display area is greater than that of the second display area and less than that of the first display area.

[0037] Optionally, the resistance of the cathode in the third display area is greater than the resistance of the cathode in the second display area, but less than the resistance of the cathode in the first display area.

[0038] Optionally, the shape of the second display area can be any one of a circle, square, oval, rhombus, polygon, or irregular shape.

[0039] In a second aspect, embodiments of the present invention also provide a display device, the display device comprising a functional device and a display panel as described in any embodiment of the first aspect; the projection of the sensing component or functional triggering component of the functional element on the substrate at least partially overlaps with the projection of the cathode removal region on the substrate at least partially.

[0040] As can be seen from the above embodiments, in this embodiment of the invention, since the second display area is located in the first region of the display surface of the display panel, and the first region is the region opposite to the region where optical functional elements are disposed at the bottom of the display surface of the display panel, the second display area includes multiple cathodes arranged in a preset pattern and multiple cathode removal areas. Therefore, under the action of the cathode removal areas, the pixel density of the second display area is less than that of the first display area, that is, the transmittance of the second display area is less than that of the first display area, thus satisfying the light-sensing requirements of the functional elements. Furthermore, since at least two of the multiple cathodes are connected in parallel, the resistance of the cathodes can be reduced, avoiding significant local voltage drops in the second display area, thereby improving the problem of the second display area being too dark. While improving the transmittance of the second display area, the display effect of the display panel is guaranteed. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram illustrating the structure of a display panel provided in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram illustrating one of the layouts of pixel units and cathodes included in a display panel according to an embodiment of the present invention;

[0044] Figure 3 This is a second schematic diagram illustrating the layout of pixel units and cathodes in a display panel provided by an embodiment of the present invention.

[0045] Figure 4 This is a third schematic diagram illustrating the layout of pixel units and cathodes in a display panel provided by an embodiment of the present invention.

[0046] Figure 5 This is one of the schematic diagrams showing the distribution of cathodes in a display panel provided by an embodiment of the present invention;

[0047] Figure 6 This is one of the schematic diagrams showing the distribution of cathodes in a display panel provided by an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram showing the distribution of the cathode removal area within the first display area of ​​a display panel according to an embodiment of the present invention;

[0049] Figure 8This is a schematic diagram showing the arrangement of cathodes in the first display area of ​​a display panel according to an embodiment of the present invention;

[0050] Figure 9 This is a schematic diagram showing the arrangement of cathodes in the first display area of ​​another display panel provided in an embodiment of the present invention;

[0051] Figure 10 This is a schematic diagram showing the distribution of different areas of a display panel according to an embodiment of the present invention.

[0052] Figure label:

[0053] 1: First display area; 2: Second display area; 3: Third display area; 4: Cathode; 5: Cathode removal area; 6: Pixel unit; 61: Sub-pixel unit; 41: First cathode; 42: Second cathode; Detailed Implementation

[0054] 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, not all, of the embodiments of the present invention. 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.

[0055] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0056] In a first aspect, embodiments of the present invention provide a display panel. Figure 1 This is a schematic diagram illustrating the structure of a display panel provided in an embodiment of the present invention. Figure 2 This diagram illustrates one of the layout schematics of pixel units and cathodes included in a display panel according to an embodiment of the present invention. Figure 3 This is a second schematic diagram illustrating the layout of pixel units and cathodes in a display panel according to an embodiment of the present invention. Figure 4 This is the third schematic diagram illustrating the layout of pixel units and cathodes in a display panel according to an embodiment of the present invention. Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, an embodiment of the present invention provides a display panel, which includes: a first display area 1 and a second display area 2; the second display area 2 is located in a first area of ​​the display surface of the display panel; the second display area 2 includes a plurality of cathodes 4 arranged in a preset pattern, a plurality of cathode removal areas 5, and at least two of the plurality of cathodes 4 are connected in parallel; wherein, the first area is the area opposite to the area at the bottom of the display surface of the display panel where optical functional elements are disposed.

[0057] In this embodiment, the first display area 1 is the main display area of ​​the display panel, and the second display area 22 is the area opposite to the area where optical functional elements are located at the bottom of the display surface. The second display area 22 can be located at any position on the display surface of the display panel, and its specific position is determined by the position of the optical functional elements in the display panel. These optical functional elements can be optical components such as cameras and photosensitive sensors, and this embodiment of the invention does not limit this. In addition, the shape of the second display area 2 can be any shape, such as circle, square, ellipse, rhombus, polygon, or irregular shape, and this embodiment of the invention does not limit this either.

[0058] To achieve the desired optical and display effects in the second display area 2, in this embodiment of the invention, the second display area 2 includes multiple cathodes 4 arranged in a preset pattern and multiple cathode removal areas 5. Thus, under the action of the cathode removal areas 5, the pixel density of the second display area 2 is less than that of the first display area 1. In other words, the gap between two adjacent pixel units 6 in the second display area 2 is larger than the gap between two adjacent pixel units 6 in the first display area 1. This gap refers to the area in either the first display area 1 or the second display area 2 where no pixel units 6 are provided, thereby making the transmittance of the second display area 2 less than that of the first display area 1. It should be noted that in this embodiment of the invention, a pixel unit 6 refers to the basic unit constituting the basic primary colors and grayscale of the display panel, and each pixel unit 6 includes one red sub-pixel, one green sub-pixel, and one blue sub-pixel.

[0059] Furthermore, it should be noted that the cathode removal area 5 can be achieved by depositing the cathode 4 across the entire surface, followed by patterned removal using laser technology. Alternatively, it can be achieved using a vacuum evaporation deposition method with an evaporation mask. Specifically, before depositing the cathode 4, a layer of material that repels the cathode 4 material is deposited using a patterned mask; this is called an inhibitor. The pattern of the inhibitor material on the cathode 4 is consistent with the pattern of the area to be removed from the cathode 4. After the inhibitor material is deposited, the entire cathode 4 is deposited. Due to the material repulsion, the area of ​​the cathode 4 with the inhibitor pattern cannot adhere, thus achieving patterned removal of the cathode 4. This forms multiple cathodes 4 arranged in a preset pattern within the second display area 2, and the cavities between the multiple cathodes 4 form the cathode removal area 5. In addition, the display panel also includes a substrate. The projections of the cathode removal area 5 and the light-emitting layer of the pixel unit 6 in the second display area 2 onto the substrate do not overlap. This ensures that the setting of the cathode removal area 5 does not affect the normal display of the second display area 2, guaranteeing the display effect of the second display area 2.

[0060] Furthermore, removing cathode 4 would cause multiple cathodes 4 to be connected in series, thereby increasing the resistance of cathode 4 and affecting the display effect of the display substrate. Therefore, in this embodiment of the invention, at least two of the multiple cathodes 4 are connected in parallel, thereby reducing the resistance of the cathode 4.

[0061] As can be seen from the above embodiments, in this embodiment of the invention, since the second display area 2 is located in the first region of the display surface of the display panel, the first region is the region opposite to the region where optical functional elements are disposed at the bottom of the display surface of the display panel. The second display area 2 includes a plurality of cathodes 4 arranged in a preset pattern and a plurality of cathode removal areas 5. Therefore, under the action of the cathode removal areas 5, the pixel density of the second display area 2 is less than the pixel density of the first display area 1, that is, the transmittance of the second display area 2 is less than the transmittance of the first display area 1, thus meeting the light-sensing requirements of the functional elements. Furthermore, since at least two of the plurality of cathodes 4 are connected in parallel, the resistance of the cathodes 4 can be reduced, avoiding significant local voltage drop in the second display area 2, thereby improving the problem of the second display area 2 being too dark. While improving the transmittance of the second display area 2, the display effect of the display panel is guaranteed.

[0062] Furthermore, the cathode 4 can be arranged in a preset pattern. The preset shape is a pattern formed by arranging multiple cathodes 4 in a certain order, such as a mesh pattern, a grid pattern, or a strip. This embodiment of the invention does not limit this.

[0063] In some embodiments, such as Figure 8 and Figure 9As shown, the second display area 2 includes a plurality of cathodes 4 arranged in a mesh pattern. It should be noted that the plurality of cathodes 4 can extend along the row direction of the pixels, and the plurality of cathodes 4 are arranged at equal intervals, so that the plurality of cathodes 4 are arranged in parallel, thereby forming a horizontal mesh structure within the second display area 2. In this embodiment, each pair of adjacent cathodes 4 forms a cathode removal area 5, and the cathode removal area 5 is elongated. Alternatively, it may also include cathodes 4 extending along the column direction of the pixels, such that the cathodes 4 along the row direction of the pixels and the cathodes 4 along the column direction of the pixels intersect. In this embodiment, four staggered cathodes 4 form a cathode removal area 5, and the cathode removal area 5 is square or rhomboid in shape. This facilitates the parallel arrangement of multiple cathodes 4 extending along the row direction of the pixels to reduce resistance.

[0064] Furthermore, such as Figure 3 and Figure 4 As shown, the second display area 2 includes a first cathode 41 and a second cathode 42; the first cathode 41 extends along the row direction of the pixels, and multiple first cathodes 41 are arranged at equal intervals along the column direction of the pixels; the second cathode 42 and the first cathode 41 are intersected so that multiple first cathodes 41 are connected in parallel.

[0065] It should be noted that the spacing between any two adjacent cathodes 4 is determined based on the transmittance required by the second display area 2. In other words, the size of the cathode removal area 5 formed between any two adjacent cathodes 4 in the pixel row direction is determined based on the transmittance required by the second display area 2. The number of second cathodes 42 can be equal to or less than the number of first cathodes 41; this embodiment of the invention does not limit this. It should also be noted that each second cathode 42 needs to be connected to each first cathode 41, that is, one second cathode 42 is connected to each row of first cathodes 41. For example, taking five first cathodes 41 and two second cathodes 42 as an example, the five first cathodes 41 are arranged sequentially along the pixel column direction, one second cathode 42 is connected to the first side of the five first cathodes 41, and the other second cathode 42 is connected to the second side of the five first cathodes 41. In this way, the second cathodes 42 and the first cathodes 41 are equivalent to a parallel circuit, thereby reducing the resistance within the second display area 2. In this embodiment of the invention, the pixel row direction and pixel column direction are two mutually perpendicular directions within the plane of the display panel. In the pixel matrix, the pixel row direction can be understood as the extension direction of each row of pixels in the pixel matrix, and the pixel column direction can be understood as the extension direction of each column of pixels in the pixel matrix. The pixel row direction is as follows: Figure 3 The direction indicated by X in the graph represents the pixel column direction. Figure 3 The direction shown in Y.

[0066] In some possible ways of implementation, such as Figure 4As shown, the included angle between the first cathode 41 and the second cathode 42 is an acute angle. In this embodiment, the plurality of first cathodes 41 can be equivalent to a rectangular region, and the second cathodes 42 are arranged along the diagonal of the matrix region, thereby enabling the plurality of first cathodes 41 to be arranged in parallel through the second cathodes 42. It should be noted that the shape of the cathode removal area 5 enclosed by the first cathodes 41 and the second cathodes 42 is triangular and trapezoidal, and the areas of the plurality of cathode removal areas 5 are not equal.

[0067] In other possible ways of implementation, such as Figure 3 As shown, the included angle between the first cathode 41 and the second cathode 42 is a right angle. In this embodiment, the plurality of first cathodes 41 can be equivalent to a rectangular region, and the second cathodes 42 are equally spaced along the two parallel sides perpendicular to the rectangular region, thereby allowing the plurality of first cathodes 41 to be connected in parallel through the second cathodes 42. It should be noted that in this embodiment, the cathode removal area 5 formed between the first cathodes 41 and the second cathodes 42 is rectangular in shape. In particular, to ensure that the area of ​​the cathode removal area 5 formed between the first cathodes 41 and the second cathodes 42 is equal, the plurality of first cathodes 41 are equally spaced, the plurality of second cathodes 42 are equally spaced, and the number of first cathodes 41 and the number of second cathodes 42 are equal, with the distance between any two adjacent first cathodes 41 being equal to the distance between any two adjacent second cathodes 42.

[0068] Furthermore, to further reduce the resistance within the second display area 2, in some embodiments, the display panel further includes a substrate, with a cathode disposed on the substrate and a light emission adjustment structure provided on the side of the cathode facing away from the substrate. It should be noted that, according to the resistance formula R = ρL / S (where ρ represents the resistivity of the resistor, determined by its inherent properties, L represents the length of the resistor, and S represents the cross-sectional area of ​​the resistor), by providing a light emission adjustment structure on the side of the cathode 4 facing away from the substrate, the cross-sectional area of ​​the cathode 4 can be increased, thereby further reducing the resistance.

[0069] Furthermore, the cathode 4 can be made of metal or alloy, and the light emission adjustment structure can be made of a metal oxide. It should be noted that the cathode 4 can be a metal such as silver, aluminum, lithium, magnesium, or indium, or an alloy such as a magnesium-silver alloy or an aluminum-lithium alloy. The light emission adjustment structure can be made of indium tin oxide, aluminum oxide, or magnesium oxide, etc., and this application does not limit the specific materials used in this embodiment.

[0070] For example, taking a magnesium-silver alloy as the cathode 4, in some embodiments, the resistance of the cathode can be reduced by adjusting the ratio of the magnesium-silver alloy. Typically, the magnesium-silver ratio in a magnesium-silver alloy is 10:1. If the magnesium-silver ratio in the magnesium-silver alloy is reduced to 9:1, 8:1, or lower, since the resistivity of magnesium is greater than that of silver, the resistance of cathode 4 can be reduced by increasing the relative proportion of silver.

[0071] In addition, it should be noted that the transmittance of the light-emitting adjustment structure is greater than that of the cathode 4, so as to ensure that the light-emitting adjustment structure does not affect the overall light transmission performance of the first display area 1 and the second display area 2.

[0072] An indium tin oxide layer is deposited on the surface of cathode 4. It should be noted that, according to the resistance formula R = ρL / S (where ρ represents the resistivity of the resistor, which is determined by its own properties, L represents the length of the resistor, and S represents the cross-sectional area of ​​the resistor), by depositing an indium tin oxide layer on the surface of cathode 4, the cross-sectional area of ​​cathode 4 can be increased, thereby further reducing the resistance.

[0073] It should also be noted that if multiple cathodes 4 are arranged around a certain sub-pixel unit 61, the resistance of that sub-pixel unit 61 will increase, causing local darkening at that sub-pixel unit 61 and affecting the display effect of the display panel. Therefore, in this embodiment of the invention, each cathode 4 needs to be evenly distributed to avoid local darkening and color shift.

[0074] Based on this, in the embodiments of the present invention, such as Figure 5 and Figure 6 As shown, the display panel includes multiple pixel units 6, each pixel unit 6 includes multiple sub-pixel units 61 of different colors, and the cathode 4 is equidistant from each sub-pixel unit 61 in the adjacent pixel unit 6.

[0075] It should be noted that the multiple pixel units 6 are arranged in a preset matrix, such as an 8x8 matrix. This ensures that sub-pixel units 61 of the same color within each pixel unit 6 are also arranged in a matrix, with gaps between adjacent pixel units 6. The cathode 4 is positioned in the gap between adjacent pixel units 6 and is evenly distributed among the multiple pixel units 6, ultimately ensuring that the distance between the cathode 4 and each sub-pixel unit 61 in adjacent pixel units 6 is equal. This avoids localized darkening at pixel units 6, prevents color shifts, and improves the display panel's performance. It should also be noted that the cathode 4 can be arranged according to... Figure 5 and Figure 6 The arrangement shown is evenly distributed, in Figure 5In this configuration, the cathodes 4 are arranged in a uniform, zigzag pattern along the pixel row, ensuring that the distance between adjacent cathodes 4 is equal, thus guaranteeing that the distance between the cathode 4 and each sub-pixel unit 61 in the adjacent pixel unit 6 is equal. Figure 6 In this embodiment, the cathode 4 is evenly arranged in the inclined direction according to the number of pixel units 6, which also ensures that the distance between the cathode 4 and each sub-pixel unit 61 in the adjacent pixel unit 6 is equal. The specific arrangement of the cathode 4 is determined according to the distribution of the pixel units 6 and the vapor deposition process of the cathode 4, and this embodiment of the invention does not limit this. In addition, it should be noted that the display panel also includes auxiliary wires, and multiple pixel units 6 are electrically connected through auxiliary wires. To further improve the transmittance of the first display area 1, the spacing between every two adjacent auxiliary wires can also be increased. It should also be noted that the distance between the cathode 4 and each sub-pixel unit 61 in the adjacent pixel unit 6 can be understood as the distance between the orthographic projection of the cathode 4 on the substrate and the distance between the cathode 4 and the orthographic projection of each sub-pixel unit 61 in the adjacent pixel unit 6 on the substrate.

[0076] Furthermore, in some embodiments, each pixel unit 6 includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit; the red sub-pixel units and green sub-pixel units are alternately spaced along the pixel row direction and alternately spaced along the pixel column direction; the blue sub-pixel unit is located between the two rows of alternately spaced green and red sub-pixel units.

[0077] It should be noted that pixel row direction and pixel column direction are two mutually perpendicular directions within the plane of the display panel. In a pixel matrix, pixel row direction can be understood as the extension direction of each row of pixels, and pixel column direction can be understood as the extension direction of each column of pixels. Pixel row direction is as follows: Figure 3 The direction indicated by X in the graph represents the pixel column direction. Figure 3The direction is indicated by Y. In this embodiment, the red, green, and blue sub-pixel units included in each pixel unit 6 can be arranged in a triangular pattern. The red and green sub-pixels are located on the same straight line upwards in the pixel row, and the blue sub-pixel units are located between the alternating rows of green and red sub-pixel units. In other words, if the red, green, and blue sub-pixel units included in each pixel unit 6 are arranged in an isosceles triangle, the line connecting the red and green sub-pixels forms the base of the isosceles triangle, and the blue sub-pixel is located at one vertex of the isosceles triangle. In this way, the distribution of the red, green, and blue sub-pixel units included in each pixel unit 6 facilitates the rational configuration of the cathode 4, making the distance between the cathode 4 and each sub-pixel unit 61 in the adjacent pixel unit 6 equal, avoiding local darkening at the pixel unit 6, avoiding color shift, and improving the display effect of the display panel.

[0078] In some embodiments, the cathode 4 is located between adjacent red and green sub-pixel units in the pixel column, or between adjacent red and green sub-pixel units in the pixel row.

[0079] It should be noted that by utilizing the distribution of the red sub-pixel units, green sub-pixel units, and blue sub-pixel units included in each pixel unit 6, the cathode 4 can be located between the red and green sub-pixel units adjacent to each other in the pixel column, or between the red and green sub-pixel units adjacent to each other in the pixel row, thereby making the distance between the cathode 4 and each sub-pixel unit 61 in the adjacent pixel unit 6 equal.

[0080] Furthermore, the blue sub-pixel units are located in the gaps between the green and red sub-pixel units that are alternately arranged in two adjacent rows.

[0081] It should be noted that in each pair of adjacent rows of sub-pixel units, one row can be distributed with alternating red, blue, red, and blue sub-pixel units, while the other row can be distributed with alternating blue, red, blue, and red sub-pixel units, resulting in an alternating distribution of red, blue, red, and blue sub-pixel units upwards along the pixel column. This creates a square sub-pixel unit grid, with the blue sub-pixel units located at the center of this grid. This ensures that the cathode 4 is positioned at the center of two sides of any adjacent square sub-pixel unit grid, guaranteeing that the distance between the cathode 4 and each sub-pixel unit 61 in the adjacent pixel unit 6 is equidistant.

[0082] In some embodiments, each pixel unit includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit; the red sub-pixel unit, green sub-pixel unit, and blue sub-pixel unit included in each pixel unit are arranged around the cathode, and the cathode 4 is offset from the blue sub-pixel unit.

[0083] It should be noted that, in this embodiment, the distance between the cathode 4 and the red sub-pixel units included in each pixel unit can be equal to the distance between the cathode 4 and the green sub-pixel units included in each pixel unit. This distance can be denoted as the first distance. The distance between the cathode 4 and the blue sub-pixel units included in each pixel unit is the second distance. The second distance is greater than the first distance, thereby causing the cathode 4 to deviate from the blue sub-pixel units. This avoids the cathode 4 being arranged around the blue sub-pixel units, avoids increasing the resistance of the blue sub-pixel units, and avoids the blue sub-pixel units becoming too dark. It should also be noted that the above-described setting of the cathode 4 deviating from the blue sub-pixel units is only an exemplary embodiment. If the red or green sub-pixel units become too dark, that is, if the cathode 4 is arranged all around the red or green sub-pixel units, the cathode 4 can be deviated from the red or green sub-pixel units.

[0084] Furthermore, in some embodiments, the cathodes 4 are arranged in an array. It should be noted that the cathodes 4 can form a square array with an equal number of rows and columns, a rectangular array with a different number of rows and columns, or a diamond array arranged diagonally upwards. Thus, when the cathodes 4 are arranged in an array, since the spacing between any two adjacent cathodes 4 is equal, the distance between the cathode 4 and each sub-pixel unit 61 in the adjacent pixel unit 6 can be guaranteed to be equal.

[0085] In other embodiments, such as Figure 7 As shown, the second display area 2 includes a central area and a peripheral area surrounding the central area, and the number of cathode removal areas 5 disposed in the central area is greater than the number of cathode removal areas 5 disposed in the peripheral area.

[0086] It should be noted that, since the central region of the second display area 2 requires a higher transmittance than the peripheral region, a greater number of cathode removal areas 5 need to be provided in the central region to meet this requirement. In this embodiment, the number of cathode removal areas 5 in the central region is greater than the number in the peripheral region. Therefore, not only can the requirement for higher transmittance in the central region be met, but the lower resistance of the peripheral region can also neutralize the higher resistance in the central region, preventing a large pixel resistance in the central region. It should also be noted that, taking a square second display area 2 as an example, in the diagonal direction of the second display area 2, the number of cathode removal areas 5 located near the intersection of the two diagonals is greater than the number of cathode removal areas 5 located at the four corners. Furthermore, in the diagonal direction, from the center to the perimeter, the spacing between each pair of removal areas increases sequentially.

[0087] Furthermore, in some embodiments, the number of cathode removal regions 5 increases sequentially from the peripheral region to the central region.

[0088] It should be noted that the cathode removal areas 5 can increase sequentially in an arithmetic progression from the peripheral area to the central area, or they can increase sequentially in a geometric progression from the peripheral area to the central area. This embodiment of the invention does not limit this. For example, taking the second display area 2 as a square area, multiple cathode removal areas 5 can be arranged diagonally. The number of cathode removal areas 5 in a row formed on both sides of the diagonal decreases sequentially from the center to the corner. Within each row of cathode removal areas 5, the spacing between each adjacent pair and between the removal areas increases sequentially in the direction from the center to the corner.

[0089] Furthermore, in this embodiment of the invention, within the second display area 2, the ratio between the area occupied by the cathode removal area 5 and the area occupied by the cathode 4 is between 0.1 and 1.

[0090] It should be noted that the ratio between the area occupied by the cathode removal region 5 and the area occupied by the cathode 4 determines the transmittance of the second display area 2. When the ratio increases, the transmittance of the second display area 2 increases; when the ratio decreases, the transmittance of the second display area 2 decreases. Thus, when the ratio between the area occupied by the cathode removal region 5 and the area occupied by the cathode 4 is between 0.1 and 1, the arrangement of the cathode removal region 5 and the cathode 4 is not limited to a specific ratio, allowing the second display area 2 to be flexibly selected according to the transmittance requirements of the internal optical components.

[0091] In addition, in some embodiments, the pixel density of the second display area 2 is a preset multiple of that of the first display area 1, so that the transmittance of the second display area 2 is greater than that of the first display area 1.

[0092] It should be noted that, to improve the optical and display effects of the display panel in the second display area 2, the pixel density of the second display area 2 is a preset multiple of that of the first display area 1. This preset multiple is a multiple less than 1 and greater than 0, such as 2 / 3, 1 / 2, 1 / 3, 1 / 4, or any other multiple of the pixel density of the first display area. This results in a larger gap between two adjacent pixel units 6 in the second display area 2 compared to the gap between two adjacent pixel units 6 in the first display area 1. This gap refers to the area in either the first display area 1 or the second display area 2 where no pixel units 6 are located, thus making the transmittance of the second display area 2 lower than that of the first display area 1.

[0093] Furthermore, such as Figure 10 As shown, the display panel also includes a third display area 3;

[0094] The third display area 3 is located between the first display area 1 and the second display area 2. The pixel density of the third display area 3 is greater than that of the second display area 2, but less than that of the first display area.

[0095] It should be noted that, since the third display area 3 is located between the first display area 1 and the second display area 2, the pixel density of the third display area 3 is greater than that of the second display area 2 but less than that of the first display area. Therefore, the pixel density of the third display area 3 falls between that of the first display area and the second display area 2, and consequently, the transmittance of the third display area 3 falls between that of the first display area and the second display area 2. This results in the transmittance of the display panel decreasing sequentially from the first display area 1, the third display area 3, and the second display area 2, creating a transition area for the increase in transmittance. The display of the third display area 3 acts as a buffer, thus preventing significant boundary differences due to pixel imbalance between the first display area 1 and the second display area 2, thereby improving the brightness and uniformity of the display panel.

[0096] It should also be noted that, in one possible implementation, the pixel density values ​​of the first display area 1, the third display area 3, and the second display area 2 form an arithmetic sequence. That is, the difference between the pixel density value of the third display area 3 and the pixel density value of the first display area 1 is equal to the difference between the pixel density value of the second display area 2 and the pixel density value of the third display area 3. This makes the transmittance of the display panel decrease evenly from the first display area 1, the third display area 3, and the second display area 2, which helps to further avoid obvious boundary differences in pixel imbalance between the first display area 1 and the second display area 2.

[0097] In another possible implementation, the pixel density values ​​of the first display area 1, the third display area 3, and the second display area 2 are in a geometric sequence. Since the pixel density values ​​of the first display area 11, the third display area 3, and the second display area 2 are in an arithmetic or geometric sequence, the transmittance of the display panel decreases in a stepwise manner from the first display area 1, the third display area 3, and the second display area 2. This helps to further avoid obvious boundary differences in pixel imbalance between the first display area 1 and the second display area 2.

[0098] In some embodiments, the resistance of the cathode 4 in the third display area 3 is greater than the resistance of the cathode 4 in the second display area 2, but less than the resistance of the cathode 4 in the first display area 1. Thus, since the resistance of the cathode 4 in the third display area 3 is greater than the resistance of the cathode 4 in the second display area 2, but less than the resistance of the cathode 4 in the first display area 1, the resistance of the third display area 3 can compensate for the resistance of the second display area 2, keeping the overall resistance in a balanced state. This avoids losses caused by increases or decreases in resistance, and maintains a balanced display effect on the display panel.

[0099] As can be seen from the above embodiments, in this embodiment of the invention, since the second display area 2 is located in the first region of the display surface of the display panel, the first region is the region opposite to the region where optical functional elements are disposed at the bottom of the display surface of the display panel. The second display area 2 includes a plurality of cathodes 4 arranged in a preset pattern and a plurality of cathode removal areas 5. Therefore, under the action of the cathode removal areas 5, the pixel density of the second display area 2 is less than the pixel density of the first display area 1, that is, the transmittance of the second display area 2 is less than the transmittance of the first display area 1, thus meeting the light-sensing requirements of the functional elements. Furthermore, since at least two of the plurality of cathodes 4 are connected in parallel, the resistance of the cathodes 4 can be reduced, avoiding significant local voltage drop in the second display area 2, thereby improving the problem of the second display area 2 being too dark. While improving the transmittance of the second display area 2, the display effect of the display panel is guaranteed.

[0100] Secondly, embodiments of the present invention also provide a display device, which includes functional components and a display panel as described in any of the embodiments of the first aspect above.

[0101] It should be noted that the display device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle display device, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. Non-mobile display devices can be personal computers (PCs), televisions (TVs), ATMs, or self-service machines, etc. This embodiment of the invention does not impose specific limitations. The beneficial effects of this display device are the same as those of the aforementioned display panel, and this embodiment of the invention will not elaborate further.

[0102] The projection of the sensing component or the triggering component of the functional element onto the substrate at least partially overlaps with the projection of the cathode removal region 5 onto the substrate, thus ensuring that the functional element can be photosensitive normally.

[0103] Optionally, the functional elements include a camera, an infrared radiation element, a reflective sensing element, an ambient light sensor, a fingerprint recognition element, and a sound-emitting element. Thus, when the transmittance of the second display area 2 of the display panel is less than that of the first display area 1, since the second display area 2 is located in the first region of the display surface of the display panel, which is the region opposite to the area where the functional elements are located at the bottom of the display surface, the transmittance of the region opposite to the region where the functional elements are located is increased compared to the transmittance of other regions. This allows the functional elements to sense light normally, thereby improving the optical and display effects of the display panel.

[0104] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0105] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0106] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0107] The technical solution provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes: a first display area and a second display area; the display panel also includes a substrate and a plurality of pixel units; The second display area is located in the first area of ​​the display surface of the display panel; The second display area includes multiple cathodes arranged in a preset pattern and multiple cathode removal areas. At least two of the cathodes are connected in parallel. The cathode removal areas are obtained by patterning removal using laser technology after full-area evaporation of the cathodes, or by vacuum evaporation deposition using an evaporation mask. The cavity between the multiple cathodes forms the cathode removal areas. The projection of the cathode removal areas onto the substrate does not overlap with the projection of the light-emitting layer of the pixel unit in the second display area. The first region is the region opposite to the region at the bottom of the display surface of the display panel where optical functional elements are disposed; The second display area includes multiple cathodes arranged in a mesh pattern; The second display area includes a first cathode and a second cathode; The first cathode extends along the row direction of the pixel, and multiple first cathodes are arranged at equal intervals along the column direction of the pixel; The second cathode and the first cathode are arranged intersectingly so that multiple first cathodes are connected in parallel.

2. The display panel according to claim 1, characterized in that, The angle between the first cathode and the second cathode is an acute angle.

3. The display panel according to claim 1, characterized in that, The angle between the first cathode and the second cathode is a right angle.

4. The display panel according to claim 1, characterized in that, The display panel also includes a substrate; The cathode is disposed on the substrate, and a light emission adjustment structure is provided on the side of the cathode facing away from the substrate.

5. The display panel according to claim 4, characterized in that, The cathode is made of a metal or alloy, and the light emission adjustment structure is made of a metal oxide. The transmittance of the light-emitting adjustment structure is greater than that of the cathode.

6. The display panel according to claim 1, characterized in that, Each pixel unit includes multiple sub-pixel units with different colors; The cathode is equidistant from each of the adjacent sub-pixel units in the pixel unit; The cathodes are arranged in an array.

7. The display panel according to claim 6, characterized in that, Each pixel unit includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit; The red sub-pixel units and the green sub-pixel units are alternately spaced along the pixel row direction, and the red sub-pixel units and the green sub-pixel units are alternately spaced along the pixel column direction; The blue sub-pixel unit is located between the green sub-pixel units and the red sub-pixel units, which are arranged in two alternating rows.

8. The display panel according to claim 7, characterized in that, The cathode is located between the red sub-pixel unit and the green sub-pixel unit that are adjacent upwards in the pixel column, or between the red sub-pixel unit and the green sub-pixel unit that are adjacent upwards in the pixel row.

9. The display panel according to claim 7, characterized in that, The blue sub-pixel unit is located in the gap between the green sub-pixel units and the red sub-pixel units, which are arranged alternately in two adjacent rows.

10. The display panel according to claim 1, characterized in that, Each pixel unit includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit; Each pixel unit includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit arranged around the cathode, with the cathode offset from the blue sub-pixel unit.

11. The display panel according to claim 1, characterized in that, The second display area includes a central area and a peripheral area surrounding the central area; The number of cathode removal zones located in the central region is greater than the number of cathode removal zones located in the peripheral region.

12. The display panel according to claim 11, characterized in that, The number of cathode removal zones increases sequentially from the peripheral area to the central area.

13. The display panel according to claim 1, characterized in that, Within the second display area, the ratio between the area occupied by the cathode removal area and the area occupied by the cathode is between 0.1 and 1.

14. The display panel according to claim 1, characterized in that, The pixel density of the second display area is a preset multiple of that of the first display area, so that the transmittance of the second display area is greater than that of the first display area.

15. The display panel according to claim 14, characterized in that, The display panel also includes a third display area; The third display area is located between the first display area and the second display area. The pixel density of the third display area is greater than that of the second display area and less than that of the first display area.

16. The display panel according to claim 15, characterized in that, The resistance of the cathode in the third display area is greater than the resistance of the cathode in the second display area, and less than the resistance of the cathode in the first display area.

17. The display panel according to claim 1, characterized in that, The shape of the second display area is any one of the following: circle, square, oval, rhombus, polygon, or irregular shape.

18. A display device, characterized in that, The display device includes functional elements and a display panel as described in any one of claims 1-17; The projection of the sensing component or functional triggering component of the functional element onto the substrate at least partially overlaps with the projection of the cathode removal region onto the substrate at least partially.

Images