Display panel and display device
By widening the fan-out line in the middle area of the fan-out zone of the display panel and applying a gradient treatment, the problem of uneven bonding impedance caused by the increase in screen size was solved, and the vertical line defects and vertical mura of the display panel were improved.
Patent Information
- Application Number
- CN202520321128.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-26
AI Technical Summary
As screen size increases, uneven stress on the IC area during bonding process leads to uneven bonding impedance distribution in the display panel, which in turn causes vertical line defects and vertical Mura defects.
In the central area of the fan-out zone of the display panel, the fan-out lines are widened, and the impedance unevenness is balanced by a gradient treatment. The fan-out lines are designed to be symmetrically distributed around the central axis of the central area, and the line width difference between adjacent fan-out lines is adjusted to achieve a smooth and gradual change in impedance.
The impedance in the middle area was reduced, which solved the problems of vertical line defects and vertical mura, and improved the display quality of the display panel.
Smart Images
Figure CN223842559U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, specifically to a display panel and display device. Background Technology
[0002] With the rise of the Mixed Reality (MR) market and the continued growth in consumer demand for large-screen displays, display panels are evolving towards larger screen sizes and higher integration. Currently, the industry commonly employs a two-chip driving solution, separating display driving and digital control functions onto two independent chips. Against this backdrop, chip-on-chip bonding (COC bonding) technology, with its high integration and space utilization advantages, has become the mainstream connection solution in the manufacturing of large-size display panels.
[0003] However, as screen size increases, uneven stress on the left, right and center of the IC (Integrated Circuit) area can easily occur during the bonding process, resulting in uneven bonding impedance distribution on the display panel, which in turn causes display defects such as poor vertical lines and vertical mura (uneven brightness or color).
[0004] Accordingly, there is a need in the field for a new display panel solution to address the aforementioned problems. Utility Model Content
[0005] In order to overcome the above-mentioned defects, this application is made to solve or at least partially solve the technical problems of poor vertical lines and vertical murmurs caused by uneven bonding impedance distribution.
[0006] In a first aspect, a display panel is provided, including a fan-out area, the fan-out area including a central region and a first edge region and a second edge region located on both sides of the central region, wherein the line width of the fan-out line in the central region is greater than the line width of the fan-out line in the first edge region and the second edge region.
[0007] In one technical solution of the above-mentioned display panel, the line width of each fan-out line in the middle area is a first width; the line width of each fan-out line in the first edge area is a second width; and the line width of each fan-out line in the second edge area is a third width.
[0008] In one technical solution of the above-mentioned display panel, the second width is equal to the third width.
[0009] In one technical solution of the above-mentioned display panel, the line width of each fan-out line in the middle area gradually increases from the edge to the center; the line width of each fan-out line in the first edge area gradually increases from the outside to the middle area; and the line width of each fan-out line in the second edge area gradually increases from the outside to the middle area.
[0010] In one technical solution of the above-mentioned display panel, the fan-out lines of the fan-out area are symmetrically distributed with respect to the central axis of the middle area.
[0011] In one technical solution of the above-mentioned display panel, the linewidth difference between adjacent fan-out lines in the middle region is equal; the linewidth difference between adjacent fan-out lines in the first edge region is equal; and the linewidth difference between adjacent fan-out lines in the second edge region is equal.
[0012] In one technical solution of the above-mentioned display panel, the linewidth difference between adjacent fan-out lines is equal from the first edge region to the middle region; the linewidth difference between adjacent fan-out lines is equal from the second edge region to the middle region.
[0013] In one technical solution of the above-mentioned display panel, the middle area includes at least a central sub-region and at least two peripheral sub-regions on both sides, wherein the line width of each fan-out line in the central sub-region is equal, and the line width of each fan-out line in each of the at least two peripheral sub-regions is equal.
[0014] The first edge region includes at least two first sub-edge regions, wherein the line width of each fan-out line in each of the at least two first sub-edge regions is equal, and the line width of the fan-out line in the first sub-edge region closer to the middle region is greater than the line width of the fan-out line in the first sub-edge region farther from the middle region.
[0015] The second edge region includes at least two second sub-edge regions, wherein the line width of each fan-out line in each of the at least two second sub-edge regions is equal, and the line width of the fan-out line in the second sub-edge region closer to the middle region is greater than the line width of the fan-out line in the second sub-edge region farther from the middle region.
[0016] In one technical solution of the above-mentioned display panel, the display panel further includes a display area and a bonding area disposed on both sides of the fan-out area, wherein the fan-out lines in the fan-out area are distributed in a fan shape from the bonding area toward the display area; or
[0017] The fan-out area includes at least a fan-out line composed of a first line segment, a second line segment, and a third line segment connected in sequence, wherein the first line segment extends from the bonding area toward the display area in a first direction, the second line segment extends toward the outside of the display panel along a second direction orthogonal to the first direction, and the third line segment extends from the end of the second line segment toward the display area along the first direction.
[0018] In a second aspect, a display device is provided, the display device comprising the display panel described in any of the above-described display panel technical solutions.
[0019] The above-described technical solutions of this application have at least one or more of the following beneficial effects:
[0020] In implementing the display panel technology solution provided in this application, by widening the fan-out line in the middle area, the impedance in the middle area is reduced, the impedance unevenness caused by bonding is balanced, and the technical problems of poor vertical lines and vertical mura are solved. Attached Figure Description
[0021] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Wherein:
[0022] Figure 1 This is a plan view of a display panel according to an embodiment of this application;
[0023] Figure 2 This is a schematic diagram of the fan-out area of a display panel according to an embodiment of this application;
[0024] Figure 3 This is a schematic diagram of the fan-out area of a display panel according to another embodiment of this application;
[0025] Figure 4 This is a schematic diagram of the fan-out area of a display panel according to another embodiment of this application;
[0026] Figure 5 This is a schematic diagram of the fan-out line distribution of a display panel according to another embodiment of this application;
[0027] Figure 6 This is a schematic diagram of the fan-out area of a display panel according to another embodiment of this application. Detailed Implementation
[0028] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application 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 this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.
[0030] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0031] For example, in one embodiment of this application, please refer to Figure 1 , Figure 1 This is a plan view of a display panel according to an embodiment of the present application, wherein the display panel 100 has a display area 101 and a non-display area surrounding the display area 101.
[0032] The non-display area includes a bonding area 103 and a fanout area 102 disposed between the display area 101 and the bonding area 103.
[0033] In one embodiment, a dual-chip solution is adopted, wherein the first chip is disposed in the bonding area 103 of the display panel 100. Exemplarily, the first chip can be integrated and fabricated on the display panel 100 using CMOS technology; the second chip ( Figure 1 (Not shown) is disposed outside the display panel 100, and signal transmission is achieved with the first chip through FPC traces on the flexible circuit board (FPC), wherein the bonding area 103 is the area that realizes the bonding between the display panel 100 and the flexible circuit board.
[0034] Specifically, the first chip is a DDIC (Display Driver Integrated Circuit), which is located in the middle of the bonding area 103.
[0035] In existing display panel solutions, during the bonding process between the display panel 100 and the flexible circuit board, the bonding area 103 is typically subjected to uneven stress, with the DDIC experiencing less stress and the sides experiencing greater stress. This results in a higher impedance in the middle after bonding and lower impedance on the left and right sides, which easily leads to vertical murmurs.
[0036] To address the aforementioned problems, this application provides a display panel, which please refer to in conjunction with the above. Figure 1 , Figure 2 .in, Figure 2 This is a schematic diagram of the fan-out area of a display panel according to an embodiment of this application.
[0037] This application provides a display panel 100, including a fan-out area 102. The fan-out area 102 includes a central region M and a first edge region L and a second edge region R located on both sides of the central region, wherein the line width of the fan-out line in the central region M is greater than the line width of the fan-out line in the first edge region L and the second edge region R.
[0038] The fan-out area 102 includes multiple fan-out lines, which are traces connecting the edge of the display area 101 to the DDIC, used to transmit electrical signals from the DDIC to various areas of the panel.
[0039] By widening the fan-out line in the middle area, the impedance in the middle area is reduced, the impedance unevenness caused by bonding is balanced, and the technical problems of poor vertical lines and vertical Mura are solved.
[0040] Specifically, the linewidth of the fan-out line within the intermediate region M is greater than the linewidth of the fan-out line within the first edge region L and the second edge region R. This means that the linewidth of any fan-out line within the intermediate region M is greater than the linewidth of any fan-out line within the first edge region L and the second edge region R. The linewidth within each region can be consistent or inconsistent.
[0041] In one embodiment, the line width of each fan-out line in the middle region M is a first width D1; the line width of each fan-out line in the first edge region L is a second width D2; and the line width of each fan-out line in the second edge region R is a third width D3.
[0042] Furthermore, in one embodiment, the second width D2 is equal to the third width D3.
[0043] In other embodiments of this application, the second width D2 and the third width D3 may be set to be unequal as needed. For example, when the impedance of the first edge region L after bonding is greater than that of the second edge region R, the second width D2 may be set to be greater than the third width D3.
[0044] In another embodiment, the linewidth of each fan-out line in the middle region M gradually increases from the edge to the center; the linewidth of each fan-out line in the first edge region L gradually increases from the outside to the middle region M; and the linewidth of each fan-out line in the second edge region R gradually increases from the outside to the middle region M.
[0045] Please see Figure 3 The linewidth of each fan-out line in the middle region M gradually increases from the edge to the center, that is, the linewidth of the fan-out line gradually increases from D11 to D13; the linewidth of each fan-out line in the first edge region L gradually increases from the outside to the middle region, that is, the linewidth of the fan-out line gradually increases from D21 to D24; the linewidth of each fan-out line in the second edge region R gradually increases from the outside to the middle region, that is, the linewidth of the fan-out line gradually increases from D31 to D34.
[0046] Wherein, the center refers to the center of the fan-out area 102. Figure 3 The center shown is on the central axis AA' of the intermediate region M.
[0047] The above technical solution widens the fan-out line in the middle area and then gradually changes the fan-out line impedance, thus achieving a smooth and gradual change in the fan-out line impedance and better balancing the impedance unevenness caused by bonding.
[0048] Furthermore, in one embodiment, the fan-out lines of the fan-out region 102 are symmetrically distributed with respect to the central axis AA' of the intermediate region M.
[0049] It should be noted that the appendix Figure 3 If the number of fan-out lines is odd, the central axis AA' is located on one fan-out line; if the number of fan-out lines is even, the central axis AA' is located between two fan-out lines.
[0050] In one embodiment, the linewidth difference between adjacent fan-out lines in the middle region M is equal; the linewidth difference between adjacent fan-out lines in the first edge region L is equal; and the linewidth difference between adjacent fan-out lines in the second edge region R is equal.
[0051] Please see Figure 3 The linewidth difference between adjacent fan-out lines in the middle region M is Δ1 = D13 - D12 = D12 - D11; the linewidth difference between adjacent fan-out lines in the first edge region L is Δ2 = D24 - D23 = D23 - D22 = D22 - D21; the linewidth difference between adjacent fan-out lines in the second edge region R is Δ3 = D34 - D33 = D33 - D32 = D32 - D31.
[0052] In this embodiment, Δ1 = Δ2 = Δ3; in other embodiments of this application, Δ1, Δ2, and Δ3 may not be equal.
[0053] In another embodiment, such as Figure 4 As shown. From the first edge region L to the middle region M, the linewidth difference between adjacent fan-out lines is equal; from the second edge region R to the middle region M, the linewidth difference between adjacent fan-out lines is also equal. Specifically, in this embodiment, the linewidth of each fan-out line in the middle region M is a first width D1. The linewidth of each fan-out line in the first edge region L gradually increases from D21 to D24, and Δ2 = D24 - D23 = D23 - D22 = D22 - D21; the linewidth of each fan-out line in the second edge region R gradually increases from D31 to D34, and Δ3 = D34 - D33 = D33 - D32 = D32 - D31.
[0054] In another embodiment of this application, please refer to Figure 5 . Figure 5 This is a schematic diagram of the fan-out line distribution of a display panel according to another embodiment of this application.
[0055] The intermediate region M includes at least a central sub-region M1 and at least two peripheral sub-regions M2 and M3 on both sides. The line width of each fan-out line in the central sub-region M1 is equal, and the line width of each fan-out line in each of the at least two peripheral sub-regions M2 and M3 is equal; that is, the line width of the fan-out line in the central sub-region M1 is DM1, the line width of the fan-out line in the peripheral sub-region M2 is DM2, and the line width of the fan-out line in the peripheral sub-region M3 is DM3.
[0056] The first edge region L includes at least two first sub-edge regions L1 and L2, wherein the line width of each fan-out line in each of the at least two first sub-edge regions L1 and L2 is equal, and the line width of the fan-out line in the first sub-edge region closer to the middle region M is larger than the line width of the fan-out line in the first sub-edge region farther away from the middle region; that is, the line width of the fan-out line in the first sub-edge region L1 is DL1, the line width of the fan-out line in the first sub-edge region L2 is DL2, and DL1 > DL2.
[0057] The second edge region R includes at least two second sub-edge regions R1 and R2, wherein the line width of each fan-out line in each of the at least two second sub-edge regions R1 and R2 is equal, and the line width of the fan-out line in the second sub-edge region closer to the middle region M is larger than the line width of the fan-out line in the second sub-edge region farther away from the middle region; that is, the line width of the fan-out line in the second sub-edge region R1 is DR1, the line width of the fan-out line in the second sub-edge region R2 is DR2, and DR1 > DR2.
[0058] The above sub-region division is only an example. The middle region M can be divided into three or more sub-regions as needed, including a central sub-region and several peripheral sub-regions symmetrically distributed on both sides. The first edge region L and the second edge region R can be divided into several sub-regions as needed, and the number is not limited to two. In one embodiment, the sub-regions of the first edge region L and the second edge region R are symmetrically arranged.
[0059] The above technical solution divides the middle region M, the first edge region L, and the second edge region R into several sub-regions, so that the fan-out line satisfies the impedance gradient while the sub-regions with consistent line width reduce the manufacturing difficulty.
[0060] Those skilled in the art will understand that Figure 5 The dashed line shown is just an example of a sub-region boundary line. In practice, the sub-region boundary line can be a straight line, a curve, or a broken line of other shapes to match the actual shape of the fan-out line.
[0061] Furthermore, in one embodiment, please refer to the appendix. Figure 1 The display panel 100 also includes a display area 101 and a bonding area 103 disposed on both sides of the fan-out area 102.
[0062] exist Figures 2 to 5 In the embodiment shown, the fan-out line undergoes path conversion, which helps to save wiring space, thereby increasing the size of the panel display area 101 and improving the screen ratio.
[0063] like Figure 2 As shown, the fan-out area 102 includes at least a fan-out line composed of a first line segment S1, a second line segment S2, and a third line segment S3 connected in sequence. The first line segment S1 extends from the bonding area 103 toward the display area 101 in a first direction, the second line segment S2 extends toward the outside of the display panel 100 along a second direction orthogonal to the first direction, and the third line segment S3 extends from the end of the second line segment S2 toward the display area 101 along the first direction.
[0064] Those skilled in the art will understand that the above embodiments of this application are also applicable to traditional linear fan-outlines.
[0065] like Figure 6 As shown, the fan-out lines in the fan-out area 102 are distributed in a fan shape from the bonding area 103 toward the display area 101; the line width D4 of the fan-out lines in the middle area M is greater than the line widths D5 and D6 of the fan-out lines in the first edge area L and the second edge area R.
[0066] The fan-out lines with straight routing do not undergo path conversion, making the manufacturing process relatively simple. In practice, those skilled in the art can choose whether to perform path conversion on the fan-out lines as needed, or they can use path conversion of other shapes.
[0067] Another aspect of this application provides a display device, which includes the display panel 100 described in any of the above-described display panel technical solutions.
[0068] Accordingly, another aspect of this application also provides a method for manufacturing a display panel, wherein the display panel 100 includes a fan-out region 102, the method comprising:
[0069] The linewidth of the fan-out line in the middle region M of the fan-out area 102 is made larger than the linewidth of the fan-out line in the first edge region L and the second edge region R located on both sides of the middle region M.
[0070] Based on the above method, by widening the fan-out line in the middle region, the impedance in the middle region is reduced, the impedance unevenness caused by bonding is balanced, and the technical problems of poor vertical lines and vertical Mura are solved.
[0071] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effect of this application, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders. These adjusted solutions are equivalent to the technical solutions described in this application and therefore will also fall within the protection scope of this application.
[0072] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a particular embodiment can be found in the relevant descriptions of other embodiments. All the above optional technical solutions can be combined in any way to form optional embodiments of this application, and will not be elaborated upon here.
[0073] The technical solution of this application has been described above with reference to one embodiment shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.
Claims
1. A display panel (100) comprising a fan-out area (102), characterized in that, The fan-out area (102) includes a middle region (M) and a first edge region (L) and a second edge region (R) located on both sides of the middle region (M), wherein the line width of the fan-out line in the middle region (M) is greater than the line width of the fan-out line in the first edge region (L) and the second edge region (R).
2. The display panel (100) according to claim 1, characterized in that, The line width of each fan-out line in the middle region (M) is a first width; the line width of each fan-out line in the first edge region (L) is a second width; and the line width of each fan-out line in the second edge region (R) is a third width.
3. The display panel (100) according to claim 2, characterized in that, The second width is equal to the third width.
4. The display panel (100) according to claim 1, characterized in that, The linewidth of each fan-out line in the middle region (M) gradually increases from the edge to the center; the linewidth of each fan-out line in the first edge region (L) gradually increases from the outside to the middle region (M); the linewidth of each fan-out line in the second edge region (R) gradually increases from the outside to the middle region (M).
5. The display panel (100) according to claim 4, characterized in that, The fan-out lines of the fan-out area (102) are symmetrically distributed around the central axis (AA') of the intermediate region (M).
6. The display panel (100) according to claim 4 or 5, characterized in that, The linewidth difference between adjacent fan-out lines in the middle region (M) is equal; the linewidth difference between adjacent fan-out lines in the first edge region (L) is equal; the linewidth difference between adjacent fan-out lines in the second edge region (R) is equal.
7. The display panel (100) according to claim 5, characterized in that, From the first edge region (L) to the middle region (M), the linewidth difference between adjacent fan-out lines is equal; from the second edge region (R) to the middle region (M), the linewidth difference between adjacent fan-out lines is equal.
8. The display panel (100) according to claim 1, characterized in that, The intermediate region (M) includes at least a central sub-region (M1) and at least two peripheral sub-regions (M2, M3) on both sides, wherein the line width of each fan-out line in the central sub-region (M1) is equal, and the line width of each fan-out line in each of the at least two peripheral sub-regions (M2, M3) is equal. The first edge region (L) includes at least two first sub-edge regions (L1, L2), wherein the line width of each fan-out line in each of the at least two first sub-edge regions (L1, L2) is equal, and the line width of the fan-out line in the first sub-edge region closer to the middle region (M) is greater than the line width of the fan-out line in the first sub-edge region farther away from the middle region (M). The second edge region (R) includes at least two second sub-edge regions (R1, R2), wherein the line width of each fan-out line in each of the at least two second sub-edge regions (R1, R2) is equal, and the line width of the fan-out line in the second sub-edge region closer to the middle region (M) is greater than the line width of the fan-out line in the second sub-edge region farther away from the middle region (M).
9. The display panel (100) according to claim 1, characterized in that, The display panel (100) further includes a display area (101) and a bonding area (103) disposed on both sides of the fan-out area (102), wherein the fan-out lines in the fan-out area (102) are distributed in a fan shape from the bonding area (103) toward the display area; or The fan-out area (102) includes at least a fan-out line consisting of a first line segment (S1), a second line segment (S2), and a third line segment (S3) connected in sequence, wherein the first line segment (S1) extends from the bonding area (103) toward the display area (101) in a first direction, the second line segment (S2) extends toward the outside of the display panel (100) along a second direction orthogonal to the first direction, and the third line segment (S3) extends from the end of the second line segment (S2) toward the display area (101) along the first direction.
10. A display device, characterized in that, The display device includes the display panel (100) according to any one of claims 1-9.