A display panel and a display device

Abstract

The present invention provides a display panel and a display device. The display panel includes a light-transmitting area, a wiring area, and a display area; an array substrate, a color filter substrate, and a liquid crystal layer located between the two substrates. The array substrate includes a first metal wiring and a second metal wiring disposed in the wiring area and the display area; the wiring area includes a first area having only the first metal wiring, a second area having only the second metal wiring, and a third area having the first metal wiring and the second metal wiring, and there is an overlapping area of the orthographic projections of the first metal wiring and the second metal wiring on the display panel in the third area; the heights of the array substrates corresponding to the first area, the second area, and the third area increase in sequence; at least the first cell thickness corresponding to the first area is set to be equal to the second cell thickness corresponding to the second area. The present invention can effectively improve the imaging quality of the light-sensitive element in the light-transmitting area of the display panel under the condition of a thin display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display panel and a display device. Background Art

[0002] As the requirements for the cost and thinning of display screens are getting higher and higher, display panels have to reduce some relatively thick film layers to meet certain cost and thickness requirements, such as the planarization layer on the array substrate.

[0003] The planarization layer on the array substrate is used to planarize the surface of the array substrate that is uneven due to the patterning of relevant film layers after preparing thin-film transistors or signal traces. When the planarization layer is removed, the surface of the array substrate is uneven, and the thickness of the liquid crystal layer formed at different positions between the array substrate and the counter substrate is non-uniform. Light passing through liquid crystal layers with different thicknesses will form different optical path differences. Since the areas where thin-film transistors or signal traces are usually located are in light-blocking areas or non-display areas, that is, they will be blocked by, for example, a black matrix, the optical path differences formed in this part have little impact on the display. However, for current popular display panels with blind hole areas, light-sensitive components such as cameras are correspondingly arranged below the blind hole areas, and there are a large number of signal traces around the blind hole areas, resulting in unevenness of the surface of the array substrate around the blind hole areas. However, the heights of the support columns for supporting the array substrate and the counter substrate are the same, which greatly affects the support effect around the blind hole areas. If support columns with different heights are prepared for different areas around the blind hole area, the implementation process is complex, and the height uniformity of the support columns is difficult to control, thus unable to ensure effective support around the blind hole areas, easily leading to poor support around the blind hole areas and serious depression in the blind hole areas, etc., affecting the imaging quality of the light-sensitive components. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a display panel and a display device, which can effectively improve the imaging quality of the light-sensitive components in the light-transmitting area, that is, the blind hole area, under the condition of a thin display panel.

[0005] In a first aspect, the present invention provides a display panel, including:

[0006] A light-transmitting area, at least part of a wiring area surrounding the light-transmitting area, and at least part of a display area surrounding the wiring area;

[0007] An array substrate and a color filter substrate arranged opposite to each other, and a liquid crystal layer located between the array substrate and the color filter substrate. The array substrate includes a first metal trace and a second metal trace provided in the wiring area and the display area. The color filter substrate includes a plurality of light-filtering parts, an optical planarization layer, and a plurality of support columns provided in the wiring area and the display area; wherein the support columns include main support columns and auxiliary support columns;

[0008] The wiring area includes a first area, a second area, and a third area. The first area only has first metal wirings, the second area only has second metal wirings, and the third area has both first metal wirings and second metal wirings. And in the direction perpendicular to the display panel, the projections of the first metal wirings and the projections of the second metal wirings have an overlapping area; the height of the array substrate corresponding to the first area is less than the height of the array substrate corresponding to the second area, and the height of the array substrate corresponding to the second area is less than the height of the array substrate corresponding to the third area;

[0009] The wiring area includes a first cell thickness, a second cell thickness, and a third cell thickness. Wherein the first cell thickness is the cell thickness corresponding to the first area, the second cell thickness is the cell thickness corresponding to the second area, and the third cell thickness is the cell thickness corresponding to the third area; at least the first cell thickness is equal to the second cell thickness.

[0010] In a second aspect, the present invention also provides a display device, and the display device includes the display panel described in the first aspect.

[0011] The display panel provided by the present invention has a relatively thin film layer thickness. The array substrate of the wiring area around the light-transmitting area has a first area, a second area, and a third area, and the heights corresponding to the three areas are different, resulting in different cell thicknesses in different areas. The present invention at least ensures that the cell thicknesses of the first area and the second area are equal, which can make the heights of the support columns in the first area and the second area consistent. Further, an operable, simple and easy photolithography process is adopted to prepare the support columns, so as to ensure the uniformity of the heights of the support columns, thereby effectively ensuring the support around the light-transmitting area, ensuring the flatness of the light-transmitting area, and improving the imaging quality of the light-sensitive element. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. The drawings described here are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0013] Figure 1 It is a top view schematic diagram of a display panel provided by an embodiment of the present invention;

[0014] Figure 2 is Figure 1 a schematic diagram of area S of the display panel;

[0015] Figure 3 is Figure 2 a schematic diagram of area S' of the display panel;

[0016] Figure 4 is Figure 3A schematic cross-sectional view along the cutting line A-A';

[0017] Figure 5 is Figure 2 Another schematic view showing the area of the display panel S';

[0018] Figure 6 is Figure 5 A schematic cross-sectional view along the cutting line B-B';

[0019] Figure 7 is Figure 2 Another schematic view showing the area of the display panel S';

[0020] Figure 8 is Figure 7 A schematic cross-sectional view along the cutting line C-C';

[0021] Figure 9 is Figure 2 Another schematic view showing the area of the display panel S';

[0022] Figure 10 is Figure 9 A schematic cross-sectional view along the cutting line D-D';

[0023] Figure 11 is Figure 2 Another schematic view showing the area of the display panel S';

[0024] Figure 12 is Figure 11 A schematic cross-sectional view along the cutting line E-E';

[0025] Figure 13 is Figure 2 Another schematic view showing the area of the display panel S';

[0026] Figure 14 is Figure 13 A schematic cross-sectional view along the cutting line F-F';

[0027] Figure 15 A schematic top view of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0028] Next, the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] At present, the demand for the thinning of display panels is increasing, and the cost of display panels is constantly decreasing. These two factors have led to the continuous thinning or deletion of the film layers of display panels. Under the demand for thinning, it may be necessary to delete non-functional film layers such as the planarization layer on the array substrate, which will result in an uneven surface of the film layer after the signal lines and driving elements on the display panel are patterned; for the blind hole screens widely used in the market, that is, there are blind hole light-transmitting areas on the display panel, and photosensitive elements such as cameras are arranged under this area for video, photography, etc. Due to the requirement of high light transmittance, support columns are not arranged in the blind hole light-transmitting area, and the blind hole light-transmitting area is prone to deformation under atmospheric pressure. The thinning of the display panel means that the film layer thickness or the substrate thickness of the display panel is thinner, which further reduces the ability of the blind hole light-transmitting area to resist external pressure, and the blind hole light-transmitting area is more likely to deform. Further, after deleting the planarization layer such as the planarization layer, the unevenness of the film layer surface makes the cell thickness of the display panel uneven, and there are a large number of signal traces around the blind hole light-transmitting area. Therefore, the cell thickness fluctuation in this area is particularly serious, resulting in uneven support force around the blind hole light-transmitting area, which further exacerbates the deformation degree of the blind hole light-transmitting area. Therefore, there is an urgent need for a solution to improve the support of the blind hole light-transmitting area of the thin display panel and ensure the imaging quality of the photosensitive elements.

[0030] An embodiment of the present invention provides a display panel, as Figures 1 - 4 shown, Figure 1 is a top view schematic diagram of a display panel provided by an embodiment of the present invention, Figure 2 is Figure 1 a schematic diagram of area S of the display panel, Figure 3 is Figure 2 a schematic diagram of area S' of the display panel, Figure 4 is Figure 3 a cross-sectional schematic diagram along the section line A-A'; the display panel 1 includes a light-transmitting area K, which corresponds to a photosensitive element located below the display panel, a wiring area P at least partially surrounds the light-transmitting area K, and a display area AA at least partially surrounds the wiring area P. The display panel 1 includes an array substrate 11 and a color filter substrate 12 arranged opposite to each other, and a liquid crystal layer 13 located between the array substrate 11 and the color filter substrate 12. The array substrate 11 in the wiring area P and the display area AA has a first metal trace M1 and a second metal trace M2. The color filter substrate 12 in the wiring area P and the display area AA has a plurality of filter parts F, an optical planarization layer OC, and a plurality of support columns PS, wherein the support columns PS include main support columns MPS and auxiliary support columns SPS.

[0031] Figures 2 - 4 In order to clearly illustrate the technical points of the present invention, only some film layers and signal lines are shown, as Figure 2Only a wiring method around the light-transmitting area K is partially shown, but it does not represent all wiring methods of the present invention, and only some signal lines are shown. The present invention does not limit the wiring method and quantity around the light-transmitting area K. And in order to fully display the positional relationship between the first metal trace M1 and the second metal trace M2, a straight line is used to represent the second metal trace M2 in the figure, and a dotted line is used to represent the first metal trace M1, and Figure 4 Only some of the film layers related to the technical key points of the present invention are shown, and other film layers are not shown. Optionally, in addition to the film layers shown in the figure on the array substrate 11 and the color filter substrate 12, other film layers may also be included; the present invention does not limit the specific shapes of the light-transmitting area K and the wiring area P. In the figure, only a circular light-transmitting area K is shown. In other optional embodiments of the present invention, its shape may also be square, oval, etc.

[0032] The wiring area P includes a first area P1, a second area P2, and a third area P3. The first area P1 only has the first metal trace M1, the second area P2 only has the second metal trace M2, and the third area P3 has the first metal trace M1 and the second metal trace M2. Among them, in the direction Z perpendicular to the display panel 1, there is a projection overlapping area of the first metal trace M1 and the second metal trace M2. Optionally, the array substrate 11 includes a substrate. The first metal trace M1 is arranged closer to the substrate than the second metal trace M2, that is, the first metal trace M1 is located below the second metal trace M2. There is a first insulating layer D1 between the first metal trace M1 and the second metal trace M2 to isolate the first metal trace M1 and the second metal trace M2 and prevent short circuit between the two. There is a second insulating layer D2 between the second metal trace M2 and the liquid crystal layer 13, that is, the second insulating layer D2 is arranged above the second metal trace M2. Optionally, a first electrode layer, a third insulating layer, a second electrode layer, and an alignment layer are sequentially stacked above the second insulating layer D2. That is, the support pillar PS located in the wiring area P actually abuts against the alignment layer. However, in order to clearly show the technical key points of the present invention, the first electrode layer, the third insulating layer, the second electrode layer, and the alignment layer are not shown in Figure 4 the figure, and its stacking method is only one of the stacking methods of the present invention. The present invention does not limit that there may be other film layer stacking methods above the second insulating layer D2. It should be noted that the film layers stacked above the second insulating layer D2 have a small thickness and have little influence on the overall thickness of the first area P1, the second area P2, and the third area P3.

[0033] Since only the first metal trace M1 exists in the first region P1, and the first metal trace M1 is located on the side close to the substrate, with the first insulating layer D1 and the second insulating layer D2 provided above it, which can fill it to a certain extent, the thickness of the array substrate 11 corresponding to the first region P1 is the smallest, that is, the height on the vertical display panel 1 is the smallest; only the second metal trace M2 exists in the second region P2, and the film layer where the second metal trace M2 is located is arranged on the side of the first metal trace M1 away from the substrate, with the second insulating layer D2 provided above it. Therefore, the thickness of the array substrate 11 corresponding to the second region P2 is larger than the thickness of the array substrate 11 corresponding to the first region P1, and it is increased by about 0.2 μm compared with the thickness of the array substrate 11 corresponding to the first region P1; the third region P3 has the first metal trace M1 and the second metal trace M2, and also has the first insulating layer D1 and the second insulating layer D2. The thickness of the corresponding array substrate 11 is the largest compared with the first region P1 and the second region P2, and it is increased by about 0.5 μm compared with the thickness of the array substrate 11 corresponding to the first region P1. That is, there are three regions with different thicknesses of the array substrate 11 in the trace region P around the light-transmitting region K. The thickness of the array substrate 11 in the first region P1 is the smallest, the thickness of the array substrate 11 in the second region P2 is in the middle, and the thickness of the array substrate 11 in the third region P3 is the largest. Thus, the cell thickness of the display panel 1 corresponding to the first region P1 is set as the first cell thickness T1, the cell thickness of the display panel 1 corresponding to the second region P2 is set as the second cell thickness T2, and the cell thickness of the display panel 1 corresponding to the third region P3 is set as the third cell thickness T3. Here, the cell thickness refers to the thickness along the Z direction between the array substrate 11 and the color filter substrate 12, that is, the thickness filled by the liquid crystal layer 13. At least the first cell thickness T1 and the second cell thickness T2 are set to be equal, that is, the column heights of the support posts PS at the first region P1 and the second region P2 can be set to be the same. Thus, by using a single photolithography technique, support posts PS with the same height can be set, without the need to add an additional support post PS preparation process, and the existing support post PS setting process can be adopted. At the same time, the uniformity of the support post PS size is ensured, thereby better ensuring the effective support around the light-transmitting region K, ensuring the flatness of the light-transmitting region, and improving the imaging quality of the light-sensitive element.

[0034] Optionally, please continue to refer to Figures 3 - 4, in the Z direction of the vertical display panel 1, the projected area of the light filtering portion F corresponding to the second region P2 can be set to 85% - 95% of the projected area of the light filtering portion F in the first region P1. For example, it can be set to 85%, 90%, or 95%. This part can be selected and set according to the specific thickness difference of the array substrate 11 corresponding to the first region P1 and the second region P2. According to the flatness of the optical flat layer OC on the color filter substrate 12 and the volume calculation of the light filtering portion F, the projected area of the light filtering portion F in the second region P2 is set to 85% - 95% of the projected area of the light filtering portion F in the first region P1. With the thickness of the light filtering portions F in the two regions remaining unchanged, the thickness of the color filter substrate 12 in the first region P1 after being flattened by the optical flat layer OC can be made greater than the thickness of the color filter substrate 12 in the second region P2 after being flattened by the optical flat layer OC. Compared with the first region P1, the thickness of the color filter substrate 12 in the second region P2 is reduced by approximately 0.2 μm, that is, the thickness difference between the two is basically the same as the thickness difference of the array substrate 11, thereby ensuring that the first cell thickness T1 is equal to the second cell thickness T2, ensuring effective support around the light transmission area K, ensuring the flatness of the light transmission area, and improving the imaging quality of the light sensing element.

[0035] Optionally, referring to Figures 3 - 4 , under the condition of ensuring that the first cell thickness T1 and the second cell thickness T2 are basically the same, in the Z direction of the vertical display panel 1, part of the main support pillars MPS can be set in the first region P1, and part of the main support pillars MPS can be set in the second region P2. Since compared with the third region P3, the first region P1 and the second region P2 only have one kind of metal trace, and the area they include is larger than that of the third region P3, and the settings of the light filtering portion F in the first region P1 and the light filtering portion F in the display area AA are kept consistent. Therefore, setting the main support pillars MPS to support the first region P1 and the second region P2 helps to keep the cell thickness of the trace area P and the display area AA consistent, ensures effective support around the light transmission area K, ensures the flatness of the light transmission area, and improves the imaging quality of the light sensing element.

[0036] Optionally, without adjusting the light filtering portion F in the third region P3, that is, keeping the projected area of the light filtering portion F in the third region P3 and the projected area of the light filtering portion F in the first region P1 in the Z direction of the vertical display panel 1 consistent. Since the thickness of the array substrate 11 corresponding to the third region P3 is relatively high, the main support pillars MPS should be avoided from supporting the third region P3, that is, the projection of the main support pillars MPS does not overlap with the third region P3, so as to avoid the main support pillars MPS abutting against regions with different thicknesses, resulting in uneven support around the light transmission area K, thereby affecting the flatness of the light transmission area and the imaging quality of the light sensing element.

[0037] Optionally, as Figures 5 - 6 shown, Figure 5 is Figure 2 another schematic diagram of the S' area of the display panel. Figure 6For Figure 5 A schematic cross-sectional view along the cutting line B-B'; in order to enhance the support around the light-transmitting area K, auxiliary support columns SPS can be provided to support the third area P3, that is, the projection of the auxiliary support columns SPS overlaps with the third area P3. At this time, the wiring area P around the light-transmitting area K is supported not only by the main support columns MPS but also by the auxiliary support columns SPS, and the heights of the main support columns MPS and the auxiliary support columns SPS are the same as those of the main support columns MPS and the auxiliary support columns SPS in the display area AA. Therefore, it can be formed by a halftone mask through a single photolithography process, which is not only simple and easy to operate but also can increase the support strength around the light-transmitting area K, helping to ensure the effective support around the light-transmitting area K, ensuring the flatness of the light-transmitting area, and improving the imaging quality of the light-sensing element.

[0038] Referring to Figures 1 - 6 , in the direction Z perpendicular to the display panel 1, the projection of a single support column PS in the main support columns MPS partially located in the first area P1 overlaps with at least two adjacent first metal traces M1, and the projection of a single support column PS in the main support columns MPS partially located in the second area P2 overlaps with at least two adjacent second metal traces M2. The projection of a single auxiliary support column SPS in the auxiliary support columns SPS partially located in the third area P3 overlaps with the projection of at least two adjacent second metal traces M2 and also overlaps with the projection of at least two adjacent first metal traces M1; on the one hand, the first metal traces M1 and the second metal traces M2 in the wiring area P are usually the winding lines of the signal lines in the display area AA, and their arrangements are very dense, that is, the distance between two adjacent traces is very small, usually less than the diameter of a single support column PS. Setting a single support column PS between two traces requires the two traces to avoid the support column PS, which may increase the occupied area of the wiring area P, making it impossible to achieve a narrow border for the light-transmitting area K and also affecting the display effect. Therefore, the single support column PS needs to be set above the traces, that is, the projection of the single support column PS needs to overlap with the projection of the first metal trace M1 and / or the second metal trace M2. On the other hand, there is actually a slight thickness difference between the thickness of the array substrate 11 corresponding to the area with traces and the gap area between adjacent traces, which is not shown in the figure. And the line width of a single trace is much smaller than the diameter of a single support column PS. Therefore, the projection of a single support column PS overlapping with the projection of at least two adjacent first metal traces M1 and / or the second metal trace M2 can ensure the support of the support column PS and prevent situations such as sliding and skewing of the support column PS, thus ensuring the effective support around the light-transmitting area K, ensuring the flatness of the light-transmitting area, and improving the imaging quality of the light-sensing element.

[0039] Optionally, as Figures 7 - 8 shown Figure 7 For Figure 2 Another schematic view of the S' area of the display panel Figure 8 ForFigure 7 A schematic cross-sectional view along the section line C-C'; it can be arranged in the direction Z perpendicular to the display panel 1. The projected area of the light filtering part F in the second area P2 is 85% - 95% of the projected area of the light filtering part F in the first area P1, such as 85%, 90%, 95%. The projected area of the light filtering part F in the third area P3 is 75% - 85% of the projected area of the light filtering part F in the first area P1, such as 75%, 80%, 85%. This part can be selectively arranged according to the specific thickness differences of the array substrates 11 corresponding to the first area P1, the second area P2, and the third area P3. According to the flatness of the optical flat layer OC on the color filter substrate 12 and the volume of the light filtering part F, the projected area of the light filtering part F in the second area P2 is set to be 85% - 95% of the projected area of the light filtering part F in the first area P1, and the projected area of the light filtering part F in the third area P3 is set to be 75% - 85% of the projected area of the light filtering part F in the first area P1. With the thickness of the light filtering parts F in the three areas remaining unchanged, the thickness of the color filter substrate 12 in the first area P1 after being flattened by the optical flat layer OC can be made greater than the thicknesses of the color filter substrates 12 in the second area P2 and the third area P3 after being flattened by the optical flat layer OC. Compared with the first area P1, the thickness of the color filter substrate 12 in the second area P2 is reduced by about 0.2 μm, and the thickness of the color filter substrate 12 in the third area P3 is reduced by about 0.5 μm. That is, the thickness difference reduction in the two areas is basically the same as the thickness difference increase in the array substrate 11, so as to ensure that the first cell thickness T1, the second cell thickness T2, and the third cell thickness T3 are all equal, ensure the uniformity of the support around the light transmission area K, ensure the flatness of the light transmission area, and improve the imaging quality of the light sensing element.

[0040] Optionally, as Figures 9 - 10 shown, Figure 9 is Figure 2 another schematic view of the S' area of the display panel, Figure 10 is Figure 9 a schematic cross-sectional view along the section line D-D'; Figure 9In this case, it is possible to set the projection areas of the light filtering parts F located in the first area P1, the second area P2, and the third area P3 to be the same in the direction Z perpendicular to the display panel 1, while the thickness of the optical flat layer OC covering the light filtering part F is set regionally, that is, the thickness h1 of the optical flat layer OC corresponding to the first area P1 is greater than the thickness h2 of the optical flat layer OC corresponding to the second area P2, and the thickness h2 of the optical flat layer OC corresponding to the second area P2 is greater than the thickness h3 of the optical flat layer OC corresponding to the third area P3, that is, h1>h2>h3, so that the first cell thickness T1, the second cell thickness T2, and the third cell thickness T3 are all equal, ensuring the uniformity of the support around the light transmission area K, ensuring the flatness of the light transmission area, and improving the imaging quality of the light sensing element. The optical flat layers OC with different thicknesses can be made of photosensitive materials and prepared using a halftone mask, or by adjusting process parameters, the optical flat layers OC in different areas are coated different numbers of times to achieve different thicknesses of the optical flat layers OC corresponding to different areas. The present invention does not limit this.

[0041] Optionally, as Figures 11 - 12 shown, Figure 11 is Figure 2 another schematic diagram of the S' area of the display panel, Figure 12 is Figure 11 a cross-sectional schematic diagram along the section line E-E'; the second auxiliary metal trace DM2 is provided in the first area P1. The second auxiliary metal trace DM2 is arranged on the same layer as the second metal trace M2, and in the direction Z perpendicular to the display panel 1, the projection of the first metal trace M1 and the projection of the second auxiliary metal trace DM2 have an overlapping area; similarly, the first auxiliary metal trace DM1 is provided in the second area P2. The first auxiliary metal trace DM1 is arranged on the same layer as the first metal trace M1, and in the direction Z perpendicular to the display panel 1, the projection of the second metal trace M2 and the projection of the first auxiliary metal trace DM1 have an overlapping area; optionally, the first auxiliary metal trace DM1 or the second auxiliary metal trace DM2 is only added in places where the support posts PS need to be provided locally, ensuring that the support posts PS are supported on the overlapping area of the first auxiliary metal trace DM1 and the second metal trace M2, or supported on the overlapping area of the first metal trace M1 and the second auxiliary metal trace DM2, that is, ensuring that the cell thicknesses in the places where the first area P1, the second area P2, and the third area P3 need to be supported are the same, thereby ensuring the uniformity of the support around the light transmission area K, ensuring the flatness of the light transmission area, and improving the imaging quality of the light sensing element.

[0042] Optionally, as Figures 7 - 10As shown, when the cell thickness corresponding to the first region P1, the second region P2, and the third region P3 is made consistent by adjusting the settings of the light filtering part F or the optical flat layer OC on the color film substrate 12, some main support pillars MPS can be arranged in the first region P1, some main support pillars MPS can be arranged in the second region P2, and some main support pillars MPS can be arranged in the third region P3. Moreover, the main support pillars MPS do not need to be arranged by distinguishing regions, which simplifies the layout scheme. And the main support pillars MPS can be prepared together with the main support pillars MPS located in the display area AA, which is beneficial to ensuring that the cell thickness of the wiring area P and the display area AA is consistent, and the supporting degree of the wiring area P is relatively uniform, so as to ensure the uniformity of the support around the light transmission area K, ensure the flatness of the light transmission area, and improve the imaging quality of the light sensing element.

[0043] Optionally, as Figures 11 - 12 shown, when the cell thickness corresponding to the regions where the support pillars PS need to be arranged in the first region P1, the second region P2, and the third region P3 is made consistent by locally increasing the auxiliary metal wiring on the array substrate 11, if the projected area of the light filtering part F in the wiring area P is not adjusted, even if the projected areas of the light filtering parts F in the wiring area P and the display area AA remain the same, due to the addition of the auxiliary metal wiring on the array substrate 11, the auxiliary metal wiring and the original metal wiring form a stack, so the overall thickness of the array substrate 11 corresponding to the area where the support pillars PS are arranged is larger, and the corresponding cell thickness is smaller. At this time, auxiliary support pillars SPS can be arranged to support the first region P1, the second region P2, and the third region P3. And in the direction Z perpendicular to the display panel 1, in the first region P1, the overlapping area of the projection of the first metal wiring M1 and the second auxiliary metal wiring DM2 is the first overlapping area; in the second region P2, the overlapping area of the projection of the second metal wiring M2 and the first auxiliary metal wiring DM1 is the second overlapping area; in the third region P3, the overlapping area of the projection of the first metal wiring M1 and the second metal wiring M2 is the third overlapping area. The auxiliary support pillars SPS can be arranged to support the first overlapping area, the second overlapping area, and the third overlapping area, which is beneficial to ensuring that the cell thickness of the wiring area P and the display area AA is consistent, and the supporting degree of the wiring area P is relatively uniform, so as to ensure the uniformity of the support around the light transmission area K, ensure the flatness of the light transmission area, and improve the imaging quality of the light sensing element.

[0044] Optionally, for the above situation, if the projected area of the light filtering portion F of the wiring area P is adjusted so that the projected area of the light filtering portion F of the wiring area P is smaller than that of the light filtering portion F of the display area AA, it is equivalent to reducing the overall thickness of the color filter substrate 12, thereby compensating for the larger thickness of the array substrate 11 in the area of the support posts PS corresponding to the wiring area P. At this time, the main support posts MPS can be set to support the first area P1, the second area P2, and the third area P3, and in the direction Z perpendicular to the display panel 1, the main support posts MPS can be set to support the first overlapping area, the second overlapping area, and the third overlapping area, which can also ensure that the cell gap of the wiring area P and the display area AA is consistent, and the support degree of the wiring area P is relatively uniform, thereby ensuring the uniformity of the support around the light transmission area K, ensuring the flatness of the light transmission area, and improving the imaging quality of the light sensing element.

[0045] Referring to Figures 7 - 10 , in the direction Z perpendicular to the display panel 1, among the main support posts MPS partially located in the first area P1, a single main support post MPS is the first main support post, and its projection overlaps with at least two adjacent first metal traces M1. Among the main support posts MPS partially located in the second area P2, a single main support post MPS is the second main support post, and its projection overlaps with at least two adjacent second metal traces M2. The single main support post MPS among the main support posts MPS located in the third area P3 is the third main support post, and its projection overlaps with the projection of at least two adjacent second metal traces M2 and also overlaps with the projection of at least two adjacent first metal traces M1. On the one hand, the first metal traces M1 and the second metal traces M2 in the wiring area P are usually the windings of the signal lines in the display area AA, and their arrangements are very dense, that is, the distance between two adjacent traces is very small, usually less than the diameter of a single support post PS. Setting a single support post PS between two traces requires the two traces to avoid the support post PS, which may increase the occupied area of the wiring area P, making it impossible to achieve a narrow border for the light transmission area K and also affecting the display effect. Therefore, it is necessary to set a single support post PS above the traces, that is, the projection of a single support post PS needs to overlap with the projection of the first metal traces M1 and / or the second metal traces M2. On the other hand, there is actually a slight thickness difference between the thickness of the array substrate 11 corresponding to the area with traces and the gap area between adjacent traces, which is not shown in the figure. And the line width of a single trace is much smaller than the diameter of a single support post PS. Therefore, the projection of a single support post PS overlapping with the projection of at least two adjacent first metal traces M1 and / or the second metal traces M2 can ensure the support of the support post PS and prevent situations such as the sliding or skewing of the support post PS, thereby ensuring the effective support around the light transmission area K, ensuring the flatness of the light transmission area, and improving the imaging quality of the light sensing element.

[0046] Similarly, referring to Figures 11 - 12, in the Z direction of the vertical display panel 1, among the auxiliary support columns SPS partially located in the first region P1, a single auxiliary support column SPS is the first auxiliary support column, and its projection overlaps with the projections of at least two adjacent first metal traces M1 and also overlaps with the projections of at least two adjacent second auxiliary metal traces DM2. Among the auxiliary support columns SPS partially located in the second region P2, a single auxiliary support column SPS is the second auxiliary support column, and its projection overlaps with the projections of at least two adjacent second metal traces M2 and also overlaps with the projections of at least two adjacent first auxiliary metal traces DM1. The projection of a single auxiliary support column SPS among the auxiliary support columns SPS partially located in the third region P3 overlaps with the projections of at least two adjacent second metal traces M2 and also overlaps with the projections of at least two adjacent first metal traces M1; the beneficial effects of its setting are as described above and will not be elaborated here. Optionally, if the projected area of the light filtering portion F of the trace area P is adjusted so that the projected area of the light filtering portion F of the trace area P is smaller than the projected area of the light filtering portion F of the display area AA, then the main support column MPS is used to support the trace area P, and the relevant setting methods are the same as those of the auxiliary support column SPS and will not be elaborated here.

[0047] Optionally, as Figures 13 - 14 shown, Figure 13 is Figure 2 another schematic diagram of the S' area of the display panel, Figure 14 is Figure 13 a cross-sectional schematic diagram along the cutting line F-F'; for the trace routing in the trace area P, there may be a situation where the projections of two or fewer second metal traces M2 and first metal traces M1 overlap. If a support column PS needs to stand in the overlapping area of the second metal trace M2 and the first metal trace M1 at this time, it may cause the support column PS to stand unsteadily. Therefore, a second auxiliary metal trace DM2 is provided on at least one side perpendicular to the extending direction of the second metal trace M2 in the third region P3. The projection of the support column PS overlaps with the projection of the second metal trace M2 and the second auxiliary metal trace DM2 on at least one side of it, so as to ensure that the support column PS located thereon has a relatively flat contact surface and ensure the support performance of the support column PS. Figure 14 Only when the third region P3 is supported by the main support column MPS, the projection of a single main support column MPS in the main support column MPS overlaps with the projection of the second metal trace M2 and the second auxiliary metal trace DM2 on at least one side of it. This solution is also applicable when the third region P3 is supported by the auxiliary support column SPS, and the projection of a single auxiliary support column SPS in the auxiliary support column SPS overlaps with the projection of the second metal trace M2 and the second auxiliary metal trace DM2 on at least one side of it.

[0048] An embodiment of the present invention also provides a display device, which includes display terminal products such as smartphones, flat panel display devices, notebook display devices, etc. For example, Figure 15 as shown Figure 15 is a top view schematic diagram of a display device provided by an embodiment of the present invention. The display device 2 includes the above-mentioned display panel 1. The beneficial effects produced by the display device are also the same as those described in the above embodiments, and will not be elaborated here.

[0049] The above description shows and describes several preferred embodiments of the present application. However, as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be within the scope of the inventive concept described herein, through the above teachings or the technology or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the appended claims of the present application.

Claims

1. A display panel, characterized in that, it includes: a light-transmitting area, a wiring area at least partially surrounding the light-transmitting area, and a display area at least partially surrounding the wiring area; an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer located between the array substrate and the color filter substrate. The array substrate includes a first metal wiring and a second metal wiring disposed in the wiring area and the display area. The color filter substrate includes a plurality of light-filtering portions, an optical flat layer, and a plurality of support columns disposed in the wiring area and the display area; the support columns include main support columns and auxiliary support columns; the wiring area includes a first area, a second area, and a third area. The first area only has the first metal wiring, the second area only has the second metal wiring, and the third area has the first metal wiring and the second metal wiring. And in the direction perpendicular to the display panel, the projections of the first metal wiring and the second metal wiring have an overlapping area; the height of the array substrate corresponding to the first area is less than the height of the array substrate corresponding to the second area, and the height of the array substrate corresponding to the second area is less than the height of the array substrate corresponding to the third area; the wiring area includes a first cell thickness, a second cell thickness, and a third cell thickness. The first cell thickness is the cell thickness corresponding to the first area, the second cell thickness is the cell thickness corresponding to the second area, and the third cell thickness is the cell thickness corresponding to the third area; at least the first cell thickness is equal to the second cell thickness.

2. The display panel according to claim 1, characterized in that, in the direction perpendicular to the display panel, the projected area of the light-filtering portion in the second area is 85% - 95% of the projected area of the light-filtering portion in the first area.

3. The display panel according to claim 1 or 2, characterized in that, in the direction perpendicular to the display panel, the projections of some of the main support columns overlap with the first area, and the projections of some of the main support columns overlap with the second area.

4. The display panel according to claim 3, characterized in that, in the direction perpendicular to the display panel, the projected area of the light-filtering portion in the third area is the same as that in the first area, and the projection of the main support column does not overlap with the third area.

5. The display panel according to claim 4, characterized in that, in the direction perpendicular to the display panel, the projection of the auxiliary support column overlaps with the third area.

6. The display panel according to claim 5, characterized in that, In the direction perpendicular to the display panel, the projection of a single main support column among the main support columns partially located in the first region overlaps with the projections of at least two adjacent first metal traces, the projection of a single main support column among the main support columns partially located in the second region overlaps with the projections of at least two adjacent second metal traces, and the projection of a single auxiliary support column among the auxiliary support columns partially located in the third region overlaps with the projections of at least two adjacent second metal traces and also overlaps with the projections of at least two adjacent first metal traces.

7. The display panel according to claim 2, wherein, in the direction perpendicular to the display panel, the projected area of the light filtering portion in the third region is 75% - 85% of the projected area of the light filtering portion in the first region.

8. The display panel according to claim 1, wherein, in the direction perpendicular to the display panel, the thickness of the optical flat layer in the first region is greater than the thickness of the optical flat layer in the second region, and the thickness of the optical flat layer in the second region is greater than the thickness of the optical flat layer in the third region.

9. The display panel according to claim 7 or 8, wherein, in the direction perpendicular to the display panel, part of the projection of the main support column overlaps with the first region, part of the projection of the main support column overlaps with the second region, and part of the main support column overlaps with the third region.

10. The display panel according to claim 9, wherein, in the direction perpendicular to the display panel, a single main support column among the main support columns partially located in the first region is a first main support column, the projection of the first main support column overlaps with the projections of at least two adjacent first metal traces, a single main support column among the main support columns partially located in the second region is a second main support column, the projection of the second main support column overlaps with the projections of at least two adjacent second metal traces, and a single main support column among the main support columns partially located in the third region is a third main support column, the projection of the third main support column overlaps with the projections of at least two adjacent second metal traces.

11. The display panel according to claim 1, wherein, the first region has a second auxiliary metal trace, the second auxiliary metal trace is arranged on the same layer as the second metal trace, and in the direction perpendicular to the display panel, the projection of the first metal trace and the projection of the second auxiliary metal trace have an overlapping area; the second region has a first auxiliary metal trace, the first auxiliary metal trace is arranged on the same layer as the first metal trace, and in the direction perpendicular to the display panel, the projection of the second metal trace and the projection of the first auxiliary metal trace have an overlapping area.

12. The display panel according to claim 11, wherein, In the direction perpendicular to the display panel, in the first region, the overlapping region between the projection of the first metal trace and the projection of the second auxiliary metal trace is the first overlapping region; in the second region, the overlapping region between the projection of the second metal trace and the projection of the first auxiliary metal trace is the second overlapping region; in the third region, the overlapping region between the projection of the first metal trace and the projection of the second metal trace is the third overlapping region. Part of the projection of the auxiliary support pillar overlaps with the first overlapping region, part of the projection of the auxiliary support pillar overlaps with the second overlapping region, and part of the auxiliary support pillar overlaps with the third overlapping region. Alternatively, part of the projection of the main support pillar overlaps with the first overlapping region, part of the projection of the main support pillar overlaps with the second overlapping region, and part of the main support pillar overlaps with the third overlapping region.

13. The display panel according to claim 11, wherein, On at least one side of the extending direction of the second metal trace perpendicular to the third region, there is the second auxiliary metal trace, and the projection of a single main support pillar among the main support pillars overlaps with both the projection of the second metal trace and the projection of the second auxiliary metal trace on at least one side thereof.

14. A display device, wherein, It includes the display panel according to any one of claims 1 to 13.

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