Display panel and display device

Abstract

This invention discloses a display panel and a display device. The display panel includes a first display area and a second display area. The display panel has a driving unit located at at least one of the first display area and the interface edge between the first and second display areas. The driving unit includes a first driving pixel circuit distributed along a first direction and at least one capacitor compensation block. Each first driving pixel circuit and each capacitor compensation block corresponds to a pixel structure. The pixel structures corresponding to the first driving pixel circuit and the pixel structures corresponding to the capacitor compensation block are both connected to the first driving pixel circuit. The electrical environments of the first and second display areas differ. By providing a capacitor compensation block, the difference in electrical environment between the first and second display areas can be effectively reduced or even eliminated, thus reducing brightness differences. Furthermore, the capacitor compensation block has a simple structure, which can improve transmittance and further enhance the display effect.

Description

Technical Field

[0001] This invention belongs to the field of display technology, specifically relating to display panels and display devices. Background Technology

[0002] With technological advancements and increasing consumer demand for large-screen smartphones, manufacturers have consistently strived to improve screen-to-body ratios. From so-called bezel-less phones to notch screens, waterdrop screens, and pop-up camera designs, the development towards true full-screen displays has been relentless. Under-display cameras are considered the ultimate solution for true full-screen displays, where the screen has no cutouts and the camera is hidden beneath the screen. Compared to notch and waterdrop screens, it further enhances the full-screen experience and improves user experience. However, existing under-display camera designs have shortcomings in refresh rate and visual effects, such as the inability to achieve high refresh rates, impact on screen-door visibility and facial recognition, or the need for 2-6 additional masks, increasing screen costs. Summary of the Invention

[0003] Currently, all FDC (under-display camera technology) mobile phones use a circular hole design of less than 3.8mm. When there are differences in the electrical environment of the screen display area of ​​the irregular screen, RC compensation is used to keep the pixel brightness of the area consistent. This includes the R-corner irregular area, and special design compensation is carried out around the notch or punch-hole screen to ensure that the pixel row where the signal is located is consistent with the charging time of the adjacent pixel row, thereby reducing the brightness difference, especially for full screen with large hole.

[0004] The present invention aims to improve at least one of the above-mentioned technical problems to at least some extent.

[0005] This invention provides a display panel including a first display area and a second display area. The display panel has a driving unit located at at least one of the first display area and the interface edge between the first and second display areas. The driving unit includes a first driving pixel circuit distributed along a first direction and at least one capacitor compensation block. Each first driving pixel circuit and each capacitor compensation block corresponds to a pixel structure. The pixel structures corresponding to the first driving pixel circuit and the pixel structures corresponding to the capacitor compensation block are both connected to the first driving pixel circuit. The electrical environments of the first and second display areas differ. By setting the capacitor compensation block, the difference in electrical environment between the first and second display areas can be effectively reduced or even eliminated, thus reducing brightness differences. Furthermore, due to the simple structure of the capacitor compensation block, the design of this invention can also improve transmittance, further enhancing the display effect.

[0006] The first display area is used to house photosensitive elements such as an under-display camera. If the transmittance of this area is too low, it will affect the performance of the photosensitive element. In some embodiments of the present invention, the pixel density of the first display area is lower than that of the second display area. This ensures that the transmittance of the first display area meets the transmittance requirements of the photosensitive element, without affecting its functionality.

[0007] According to an embodiment of the present invention, the driving unit includes a first driving pixel circuit and a capacitor compensation block. The two pixel structures corresponding to the first driving pixel circuit and the capacitor compensation block are both connected to the first driving pixel circuit. Therefore, one first driving pixel circuit in the driving unit can drive the pixel structure located above the first driving pixel circuit and also drive the pixel structure located above the capacitor compensation block; that is, one first driving pixel circuit can drive two pixel structures, achieving a one-to-two effect. This further improves transmittance and enhances the display effect.

[0008] According to an embodiment of the present invention, the display panel further includes a plurality of gate signal lines extending along a first direction. The capacitor compensation block includes a first electrode plate and a second electrode plate stacked together, and an insulating layer located between the first electrode plate and the second electrode plate. The first electrode plate is connected to the gate signal lines, and the second electrode plate is connected to the direct signal lines. Therefore, the capacitor compensation block can compensate for the gate signal lines, reducing the load difference between gate signal lines in different rows and further improving the display effect.

[0009] According to an embodiment of the present invention, the material forming the insulating layer includes silicon nitride.

[0010] According to an embodiment of the present invention, the display panel includes a first gate metal layer, a second gate metal layer, a first source / drain metal layer and a second source / drain metal layer stacked together, and an insulating medium is spaced between the first gate metal layer, the second gate metal layer, the first source / drain metal layer and the second source / drain metal layer, the first electrode plate is formed by the first gate metal layer and the second electrode plate is formed by the second gate metal layer.

[0011] According to an embodiment of the present invention, the pixel structure corresponding to the capacitor compensation block is connected to the first driving pixel circuit through a first trace, the first trace being formed by the second source / drain metal layer.

[0012] According to an embodiment of the present invention, the second display area is provided with a second driving pixel circuit, which has the same structure as the first driving pixel circuit. Therefore, the first and second driving pixel circuits can be formed in a single process, simplifying the operation and eliminating the need for an additional masking process, thus reducing production costs.

[0013] According to an embodiment of the present invention, the display panel further includes a plurality of data transmission lines extending along a second direction, wherein the first direction intersects the second direction; the data transmission lines are formed by the first source / drain metal layer.

[0014] According to an embodiment of the present invention, the outline of the first display area is circular, elliptical, rectangular or irregular.

[0015] According to an embodiment of the present invention, the driving unit includes a first driving pixel circuit and two capacitor compensation blocks. Each capacitor compensation block corresponds to a pixel structure, and the first driving pixel circuit and the pixel structures corresponding to the two capacitor compensation blocks are all connected. Therefore, one first driving pixel circuit in the driving unit can drive both the pixel structure located above it and the pixel structure located above the capacitor compensation blocks; that is, one first driving pixel circuit can drive three pixel structures, achieving a one-to-three effect. This further improves transmittance and enhances the display effect.

[0016] The present invention also provides a display device comprising the display panel described above. Thus, the display device possesses all the features and advantages of the display panel described above, which will not be repeated here.

[0017] According to an embodiment of the present invention, the display device further includes a photosensitive element disposed below a first display area of ​​the display panel. The photosensitive element includes a camera, a face recognition sensor, etc. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the display panel in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the display panel structure in another embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the display panel structure in another embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the display panel structure in another embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the display panel structure in another embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] A1 - First display area, A2 - Second display area, 100 - Driving unit, 110 - First driving pixel circuit, 120 - Capacitor compensation block, 200 - Pixel structure, 210 - First sub-pixel structure, 220 - Second sub-pixel structure, 230 - Third sub-pixel structure, 300 - Gate signal line, 400 - Direct signal line, 500 - First trace, 600 - Data transmission line, a - First reset signal line, b - Second reset signal line, c - Second direct signal line, d - Light emission signal line. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below. These embodiments are exemplary and are only used to explain the present invention, and should not be construed as limiting the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the art or according to the product instructions. Reagents used, unless otherwise specified, are all commercially available conventional products.

[0026] This invention provides a display panel, referenced Figure 1 The display panel includes a first display area A1 and a second display area A2, as shown in the reference. Figure 2 The display panel has a driving unit 100 located at at least one of the interface edges of the first display area A1 and the second display area A2. The driving unit 100 includes a first driving pixel circuit 110 distributed along a first direction and at least one capacitor compensation block 120. Each first driving pixel circuit 110 and each capacitor compensation block 120 is correspondingly provided with a pixel structure 200. Both the pixel structure 200 corresponding to the first driving pixel circuit 110 and the pixel structure 200 corresponding to the capacitor compensation block 120 are connected to the first driving pixel circuit 110. Since the electrical environments of the first display area A1 and the second display area A2 differ, by setting the capacitor compensation block 120, the difference in electrical environment between the first display area A1 and the second display area A2 can be reduced or even eliminated, thereby reducing brightness differences and achieving a high refresh rate. Because the capacitor compensation block 120 has a simpler structure than the first driving pixel circuit 110, it can reduce wiring density, increase transmittance, improve display effect, and also improve process yield. Furthermore, since the area of ​​the capacitor compensation block 120 is smaller than that of the first driving pixel circuit 110, space can be saved, and more pixel structures 200 can be set in the first display area A1 to further improve the display effect.

[0027] For ease of understanding, the principles of this invention will be briefly explained here.

[0028] The display panel further includes a substrate, with a driving unit 100 located on one side of the substrate and pixel structures 200 located on the side of the driving unit 100 away from the substrate. The number of pixel structures above the driving unit 100 is equal to the sum of the number of first driving pixel circuits 110 and the number of capacitor compensation blocks 120 in the driving unit 100, and multiple pixel structures correspond one-to-one with the driving pixel circuits 110 and the capacitor compensation blocks 120, that is, each first driving pixel circuit 110 has one pixel structure 200 above it, and each capacitor compensation block 120 has one pixel structure 200 above it. The pixel structures 200 corresponding to the first driving pixel circuits 110 and the pixel structures 200 corresponding to the capacitor compensation blocks 120 are all connected to the first driving pixel circuits 110. Specifically, the pixel structures 200 above the first driving pixel circuits 110 are driven to emit light through the first driving pixel circuits 110; the pixel structures 200 located above the capacitor compensation blocks 120 are driven to emit light through the adjacent first driving pixel circuits 110. In other words, through a first driving pixel circuit 110 in the driving unit 100, multiple pixel structures 200 located above the driving unit 100 can be driven to achieve the effect of one driving two, one driving three, or one driving N (N is greater than or equal to 4).

[0029] According to an embodiment of the present invention, the pixel density of the first display area A1 is less than the pixel density of the second display area A2. Specifically, the first display area A1 is an under-display camera area. The pixel density of the under-display camera area is less than the pixel density of the normal display area, which allows the transmittance of the under-display camera area to meet the transmittance requirements of the photosensitive element without affecting the function of the photosensitive element.

[0030] The driving unit 100 is located at at least one of the interfaces between the first display area A1 and the second display area A2. When the driving unit 100 is located in the first display area A1, compensation can be performed at the under-display camera opening position. When the driving unit 100 is located at the interface between the first display area A1 and the second display area A2, compensation can be performed at the edge of the under-display camera opening position. Alternatively, the driving unit 100 can be set at the first display area A1, and also at the interface between the first display area A1 and the second display area A2. In this case, compensation is performed at both the under-display camera opening position and the edge of the opening.

[0031] Those skilled in the art can select the position of the driving unit 100 based on the difference in electrical environment between the first display area A1 and the second display area A2. For example, when the difference in electrical environment between the first display area A1 and the second display area A2 is small, compensation can be made only at the edge of the under-display camera opening, that is, the driving unit 100 can be placed at the interface edge between the first display area A1 and the second display area A2. When the difference in electrical environment between the first display area A1 and the second display area A2 is large, compensation can be made at the position of the under-display camera opening, that is, the driving unit 100 can be placed in the first display area A1, or the driving unit 100 can be placed in the first display area A1, and the driving unit 100 can also be placed at the interface edge between the first display area A1 and the second display area A2.

[0032] According to an embodiment of the present invention, the driving unit 100 includes a first driving pixel circuit 110 and a capacitor compensation block 120. Two pixel structures 200 corresponding to the first driving pixel circuit 110 and the capacitor compensation block 120 are both connected to the first driving pixel circuit 110. Therefore, the first driving pixel circuit 110 can drive both the pixel structure 200 located above it and the pixel structure 200 located above the capacitor compensation block 120, achieving a one-to-two effect. Specifically, when the first driving pixel circuit 110 illuminates the pixel structure 200 above it, the pixel structure 200 located above the capacitor compensation block 120 also illuminates. This further improves transmittance and enhances the display effect.

[0033] The display panel also includes multiple gate signal lines 300 extending along a first direction. Some pixels in the first display area A1 and pixels in the same row in the second display area A2 provide gate signals through the same gate signal line. Other gate signal lines are only electrically connected to pixels in the second display area A2 and provide gate signals. In this case, there is a load difference between the different gate signal lines, resulting in differences in the gate signals of the pixels, which affects the uniformity of screen brightness and the display quality.

[0034] According to an embodiment of the present invention, reference Figure 3 The capacitor compensation block 120 includes a first electrode plate and a second electrode plate stacked together, and an insulating layer located between the first electrode plate and the second electrode plate. The first electrode plate is connected to the gate signal line 300, and the second electrode plate is connected to the direct signal line 400 (Vinital). The direct signal line 400 is used to fix the voltage and initialize the device. Thus, with the first electrode plate connected to the gate signal line 300, the capacitor compensation block 120 can compensate for the capacitance of the gate signal line, reducing the load difference of gate signal lines located in different rows and improving display quality.

[0035] According to an embodiment of the present invention, the material forming the insulating layer includes silicon nitride.

[0036] This invention does not limit the thickness of the insulating layer; those skilled in the art can adjust it according to application requirements. For example, it can be...

[0037] According to some embodiments of the present invention, the first driving pixel circuit 110 may include structures such as "2T1C", "6T1C", "7T1C", "6T2C" or "7T2C", where "T" represents a thin film transistor, the number before "T" indicates the number of thin film transistors, and "C" represents a storage capacitor, the number before "C" indicates the number of storage capacitors.

[0038] Compared to the structure of the first driving pixel circuit 110, the capacitor compensation block 120 has a simpler structure, which can improve the transmittance of the first display area, that is, improve the transmittance of the under-display camera area without affecting the function of the under-display camera. At the same time, compared to the footprint of the first driving pixel circuit 110, the footprint of the capacitor compensation block 120 is smaller. Therefore, more pixel structures can be set in the first display area to reduce the image gap between the first and second display areas, improve or even solve the screen-door effect, and improve the display effect.

[0039] According to some embodiments of the present invention, reference Figure 3 The display panel also includes multiple traces, including but not limited to a first reset signal line a, a second reset signal line b, a second direct signal line c, and an illuminant signal line d.

[0040] According to an embodiment of the present invention, the display panel includes a first gate metal layer, a second gate metal layer, a first source / drain metal layer and a second source / drain metal layer stacked together, and an insulating medium is spaced between the first gate metal layer, the second gate metal layer, the first source / drain metal layer and the second source / drain metal layer, the first electrode plate is formed by the first gate metal layer and the second electrode plate is formed by the second gate metal layer.

[0041] According to an embodiment of the present invention, reference Figure 2 The pixel structure 200 includes a first sub-pixel structure 210, a second sub-pixel structure 220, and a third sub-pixel structure 230. The first sub-pixel structure 210, the second sub-pixel structure 220, and the third sub-pixel structure 230 emit different colors, such as red sub-pixels, green sub-pixels, and blue sub-pixels.

[0042] According to an embodiment of the present invention, reference Figure 4 The pixel structure 200 corresponding to the capacitor compensation block 120 is connected to the first driving pixel circuit 110 through the first trace 500, which is formed by the second source-drain metal layer.

[0043] According to an embodiment of the present invention, a second driving pixel circuit is provided in the second display area A2, and the second driving pixel circuit has the same structure as the first driving pixel circuit 110. Therefore, the first driving pixel circuit 110 and the second driving pixel circuit can be formed in a single process, which is simple to manufacture, does not require additional masking, and results in lower production costs.

[0044] According to an embodiment of the present invention, the display panel further includes a plurality of data transmission lines 600 extending along a second direction, wherein the first direction intersects the second direction; the data transmission lines 600 are formed by the first source / drain metal layer.

[0045] According to embodiments of the present invention, the outline of the first display area A1 is circular, elliptical, rectangular, or irregular. Furthermore, the present invention does not limit the size of the first display area A1; those skilled in the art can select the appropriate size according to their usage requirements.

[0046] According to an embodiment of the present invention, reference Figure 5 The driving unit 100 includes a first driving pixel circuit 110 and two capacitor compensation blocks 120. Each capacitor compensation block 120 is correspondingly provided with a pixel structure 200. The first driving pixel circuit 110 and the corresponding pixel structures 200 of the two capacitor compensation blocks 120 are all connected. Thus, the first driving pixel circuit 110 can drive the pixel structure 200 above it to emit light, and it can also drive the pixel structure 200 above the capacitor compensation block 120 to emit light, achieving one-to-three illumination. Since the area of ​​the capacitor compensation block 120 is smaller than that of the first driving pixel circuit 110, the transmittance of the camera area can be further improved, and more pixel structures 200 can be set in the camera area, which can further improve the display effect.

[0047] Specifically, refer to Figure 3 The wiring in the under-display camera area may include: first driving pixel circuit 110 - capacitor compensation block 120 - capacitor compensation block 120 - first driving pixel circuit 110.

[0048] It should be noted that, Figure 2 This illustration shows a scenario where the drive unit 100 includes a capacitor compensation block 120. Figure 5 The illustration shows a drive unit 100 including two capacitor compensation blocks 120. However, the number of capacitor compensation blocks 120 in the drive unit 100 is not limited to this; the number of capacitor compensation blocks can be 3, 4, 5, 6, or more, and it can still achieve the same functionality as in the driving unit 100. Figure 2 The structure shown Figure 5 The technical effects of structures similar to those shown, such as improved transmittance, increased process yield, and improved display quality, will not be elaborated upon here.

[0049] The present invention also provides a display device comprising the display panel described above. Therefore, this display device possesses all the features and advantages of the display panel described above, which will not be repeated here. In general, this display device has a better display effect.

[0050] According to an embodiment of the present invention, the display device further includes a photosensitive element disposed below a first display area A1 of the display panel. The photosensitive element includes a camera, and also includes a face recognition sensor, etc.

[0051] In the description of this invention, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0052] Additionally, it should be noted that the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0053] In the description of this specification, the references to terms such as "one embodiment," "another embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope 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 has a driving unit located at at least one of the first display area and the interface edge between the first and second display areas. The driving unit includes a first driving pixel circuit distributed along a first direction and at least one capacitor compensation block. Each first driving pixel circuit and each capacitor compensation block corresponds to a pixel structure. The pixel structure corresponding to the first driving pixel circuit and the pixel structure corresponding to the capacitor compensation block are both connected to the first driving pixel circuit. The display panel also includes a plurality of gate signal lines extending along the first direction. The capacitor compensation block includes a first electrode plate and a second electrode plate stacked together, and an insulating layer located between the first electrode plate and the second electrode plate. The first electrode plate is connected to the gate signal lines, and the second electrode plate is connected to the direct signal lines. The first electrode plate is formed by a first gate metal layer, and the second electrode plate is formed by a second gate metal layer.

2. The display panel according to claim 1, characterized in that, The pixel density of the first display area is less than that of the second display area.

3. The display panel according to claim 1, characterized in that, The driving unit includes a first driving pixel circuit and a capacitor compensation block. The two pixel structures corresponding to the first driving pixel circuit and the capacitor compensation block are both connected to the first driving pixel circuit.

4. The display panel according to claim 1, characterized in that, The material forming the insulating layer includes silicon nitride.

5. The display panel according to claim 1, characterized in that, The display panel includes a first gate metal layer, a second gate metal layer, a first source / drain metal layer, and a second source / drain metal layer stacked together, and an insulating medium is spaced between the first gate metal layer, the second gate metal layer, the first source / drain metal layer, and the second source / drain metal layer.

6. The display panel according to claim 5, characterized in that, The pixel structure corresponding to the capacitor compensation block is connected to the first driving pixel circuit through a first trace, which is formed by the second source-drain metal layer.

7. The display panel according to claim 1, characterized in that, The second display area is provided with a second driving pixel circuit, which has the same structure as the first driving pixel circuit.

8. The display panel according to claim 1, characterized in that, The display panel also includes a plurality of data transmission lines extending along a second direction, wherein the first direction intersects the second direction; The data transmission line is formed by a first source / drain metal layer.

9. The display panel according to claim 1, characterized in that, The outline of the first display area is circular, elliptical, rectangular, or irregular.

10. The display panel according to claim 1, characterized in that, The driving unit includes a first driving pixel circuit and two capacitor compensation blocks. Each capacitor compensation block is provided with a corresponding pixel structure. The first driving pixel circuit and the pixel structures corresponding to the two capacitor compensation blocks are all connected.

11. A display device, characterized in that, The display device includes the display panel as described in any one of claims 1-10.

12. The display device according to claim 11, characterized in that, The display device also includes a photosensitive element disposed below the first display area of ​​the display panel.

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