Display panel and display device

Abstract

The present application discloses a display panel and a display device, which relate to the field of display technology and can improve the light leakage problem caused by the sliding of support pillars without affecting the aperture ratio of display pixels. The display panel comprises: a color filter substrate; an array substrate arranged opposite to the color filter substrate, the array substrate comprising a driving transistor, a gate signal line and a data signal line, the gate signal line and the data signal line are both electrically connected to the driving transistor; a plurality of support pillars are arranged on one side of the array substrate close to the color filter substrate; the orthographic projection of the support pillars on the array substrate at least partially covers the area where the driving transistor is located and / or the area where the gate signal line is located and / or the area where the data signal line is located.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] At present, traditional liquid crystal display products usually have the problem of scratching the alignment film after the support column slides due to external force. The scratched position of the alignment film cannot be aligned normally, and the liquid crystal molecules are disordered, which easily causes light leakage. The light leakage caused by the scratched alignment film usually manifests as uneven display, broken bright spots or red and blue spots. However, the existing way to solve the light leakage caused by the sliding of the support column is usually to enlarge or widen the shading structure to cover the light leakage at the scratched position, but this solution will cause the display pixel aperture ratio to decrease. Summary of the invention

[0003] The embodiments of the present application provide a display panel and a display device, which can improve the light leakage problem caused by the sliding of support columns without affecting the display pixel aperture ratio.

[0004] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising:

[0005] Color film substrate;

[0006] An array substrate, arranged opposite to the color filter substrate, the array substrate comprising a driving transistor, a gate signal line and a data signal line, the gate signal line and the data signal line are both electrically connected to the driving transistor;

[0007] A plurality of supporting columns are arranged on one side of the array substrate close to the color filter substrate;

[0008] The orthographic projection of the supporting pillar on the array substrate at least partially covers the area where the driving transistor is located and / or the area where the gate signal line is located and / or the area where the data signal line is located.

[0009] In some embodiments, the driving transistor includes a gate and a source-drain electrode;

[0010] The orthographic projection of at least one of the support pillars on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line; and / or,

[0011] An orthographic projection of at least one of the supporting pillars on the array substrate covers an overlapping region between the gate and the source-drain electrode.

[0012] In some embodiments, the geometric center of the orthographic projection of at least one of the support pillars on the array substrate coincides with the geometric center of the overlapping region of the gate signal line and the data signal line; and / or,

[0013] The geometric center of the orthographic projection of at least one of the support pillars on the array substrate coincides with the geometric center of the region where the driving transistor is located; and / or,

[0014] The geometric center of the orthographic projection of at least one of the support pillars on the array substrate coincides with the geometric center of the overlapping region of the gate and the source-drain electrode.

[0015] In some embodiments, the support column includes a first support column and a second support column;

[0016] In the thickness direction of the array substrate, the size of the first supporting column is greater than the size of the second supporting column.

[0017] In some embodiments, the orthographic projection of the first supporting column on the array substrate covers the area where the driving transistor is located, and / or the orthographic projection of the first supporting column on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line;

[0018] The orthographic projection of the second supporting column on the array substrate covers the area where the gate signal line is located, and / or, the orthographic projection of the second supporting column on the array substrate covers the area where the data signal line is located, and / or, the orthographic projection of the second supporting column on the array substrate covers the area where the driving transistor is located, and / or, the orthographic projection of the second supporting column on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line.

[0019] In some embodiments, the orthographic projection of the first supporting column on the array substrate covers the area where the driving transistor is located, the orthographic projection of part of the second supporting column on the array substrate covers the area where the gate signal line is located, and the orthographic projection of part of the second supporting column on the array substrate covers the area where the driving transistor is located.

[0020] In some embodiments, the support column further comprises a third support column;

[0021] In the thickness direction of the array substrate, the size of the second supporting column is greater than the size of the third supporting column;

[0022] The orthographic projection of the third support column on the array substrate covers the area where the gate signal line is located, and / or, the orthographic projection of the third support column on the array substrate covers the area where the data signal line is located, and / or, the orthographic projection of the third support column on the array substrate covers the area where the driving transistor is located, and / or, the orthographic projection of the third support column on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line.

[0023] In some embodiments, the second support column and the third support column are arranged at intervals from each other.

[0024] In some embodiments, the ratio of the effective support density of the first support column to the support end surface density is greater than or equal to 90%;

[0025] Among them, the effective support density is the actual contact density between one end of all the first support columns close to the color film substrate and the color film substrate, the actual contact density is the actual contact area divided by the area of ​​the display area of ​​the display panel, and the support end surface density is the end area of ​​all the first support columns close to one end of the color film substrate divided by the area of ​​the display area.

[0026] In some embodiments, the display panel further includes:

[0027] A liquid crystal layer, disposed between the array substrate and the color filter substrate;

[0028] The color filter substrate comprises a light shielding structure and a color filter film, wherein the light shielding structure is arranged between adjacent color filter films;

[0029] The orthographic projection of the support column on the color filter substrate falls into the area where the light shielding structure is located.

[0030] In some embodiments, one end of the first supporting column close to the color filter substrate is disposed in a gap formed between adjacent color filter films at corresponding positions.

[0031] In some embodiments, the color filter film around the first support column forms a retaining wall;

[0032] In the thickness direction of the array substrate, a ratio of a size of the retaining wall to a size of the first supporting column is less than or equal to 1 / 3.

[0033] In some embodiments, the driving transistor includes a gate and a source-drain electrode, and the orthographic projection of the first supporting column on the array substrate covers an overlapping area of ​​the gate and the source-drain electrode;

[0034] In the thickness direction of the array substrate, the size of the first support column is the thickness of the liquid crystal layer corresponding to the area where the first support column is located minus the thickness of the gate, the thickness of the source and drain electrodes, and the difference in thickness between the shading structure and the color filter film.

[0035] In some embodiments, the color filter film surrounding the support pillar includes a blue filter film and a red filter film.

[0036] According to a second aspect of an embodiment of the present application, a display device is provided, including:

[0037] A display panel as described in the first aspect.

[0038] The display panel provided by the embodiment of the present application is provided with a support structure on a side of the array substrate close to the color film substrate, and the orthographic projection of the support column on the array substrate at least partially covers the area where the driving transistor is located, and / or the orthographic projection of the support column on the array substrate at least partially covers the area where the gate signal line is located, and / or the orthographic projection of the support column on the array substrate at least partially covers the area where the data signal line is located. The support column is provided in the area where the opaque gate signal line, data signal line or driving transistor is located, so that the light transmittance of the display panel is not affected. In addition, due to the shading characteristics of the gate signal line, data signal line or driving transistor, and the position of the top of the support column is the area where the shading structure on the color film substrate is located, scratch leakage can be improved without increasing the size of the shading structure. In addition, since the surface of the color filter substrate close to the array substrate is flatter than the surface of the array substrate close to the color filter substrate, the contact area between the top of the support column and the color filter substrate is larger, and the actual base area between the top of the traditional support column and the array substrate is larger, so the support effect is better. On the basis of the same support effect, the top area of ​​the support column can be reduced, so there is no need to increase the size of the shading structure, and the size of the shading structure can even be reduced as the support area of ​​the support column is reduced, which can further increase the aperture ratio of the display panel, thereby improving the light transmittance of the display panel and improving the display effect. In addition, since the color filter substrate is relatively flat, the support column is set on the array substrate, and the contact between the support column and the color filter substrate is more stable, which can reduce the risk of the support column slipping due to external force and scratching the alignment film, thereby improving the poor light leakage caused by scratches on the support column of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic partial cross-sectional structure diagram of a display panel provided in an embodiment of the present application;

[0040] Figure 2 A schematic partial structural diagram of an array substrate provided in an embodiment of the present application;

[0041] Figure 3 A schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application;

[0042] Figure 4 A schematic partial cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0043] Figure 5 A schematic partial cross-sectional structure diagram of another display panel provided in an embodiment of the present application;

[0044] Figure 6A schematic partial structural diagram of another array substrate provided in an embodiment of the present application;

[0045] Figure 7 A schematic partial cross-sectional structure diagram of a display panel provided in an embodiment of the present application;

[0046] Figure 8 A schematic partial structural diagram of another array substrate provided in an embodiment of the present application;

[0047] Fig. 9 A schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application;

[0048] Fig.10 A position relationship diagram of a support column provided in an embodiment of the present application;

[0049] Fig.11 A schematic partial cross-sectional structure of another display panel provided in an embodiment of the present application;

[0050] Fig.12 A schematic structural diagram of a display panel provided in an embodiment of the present application;

[0051] Fig.13 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0053] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0054] At present, traditional liquid crystal display products usually have the problem of scratching the alignment film after the support column slides due to external force. The scratched position of the alignment film cannot be aligned normally, and the liquid crystal molecules are disordered, which easily causes light leakage. The light leakage caused by the scratched alignment film usually manifests as uneven display, broken bright spots or red and blue spots. However, the existing way to solve the light leakage caused by the sliding of the support column is usually to enlarge or widen the shading structure to cover the light leakage at the scratched position, but this solution will cause the display pixel aperture ratio to decrease.

[0055] In view of this, the embodiments of the present application provide a display panel and a display device, which can improve the light leakage problem caused by the sliding of the support column without affecting the display pixel aperture ratio.

[0056] According to a first aspect of an embodiment of the present application, a display panel is provided. Figure 1 A schematic partial cross-sectional structure diagram of a display panel provided in an embodiment of the present application; Figure 2 A schematic partial structural diagram of an array substrate provided in an embodiment of the present application. Figure 1 and Figure 2 The display panel provided in the embodiment of the present application includes: a color film substrate 100 and an array substrate 200, the array substrate 200 is arranged opposite to the color film substrate 100, the array substrate 200 includes a driving transistor 210, a gate signal line 220 and a data signal line 230, and the gate signal line 220 and the data signal line 230 are both electrically connected to the driving transistor 210; a plurality of supporting columns 300 are arranged on a side of the array substrate 200 close to the color film substrate 100; the orthographic projection of the supporting column 300 on the array substrate 200 at least partially covers the area where the driving transistor 210 is located, and / or, the orthographic projection of the supporting column 300 on the array substrate 200 at least partially covers the area where the gate signal line 220 is located, and / or, the orthographic projection of the supporting column 300 on the array substrate 200 at least partially covers the area where the data signal line 230 is located. The support column 300 can be used to support the distance between the array substrate 200 and the color filter substrate. A liquid crystal layer can be arranged between the array substrate 200 and the color filter substrate 100 , and the support column 300 can be used to support the thickness of the liquid crystal layer, that is, to support the cell thickness.

[0057] For example, Figure 2As shown, the gate signal line 220 and the data signal line 230 intersect, but the two belong to different metal layers and are insulated from each other. The area formed by the intersection of the gate signal line 220 and the data signal line is the pixel area 101. The data signal line 230 is used to electrically connect the source and drain electrodes of the driving transistor 210 to provide a data signal; the gate signal line 220 is used to electrically connect the gate of the driving transistor 210 to provide a scanning drive signal. For example, the driving transistor 210 can be arranged in the intersection area of ​​the gate signal line 220 and the data signal line 230 or in the vicinity of the intersection area. Usually, the driving transistor 210 is used to drive the pixel electrode. The channel on the active layer of the driving transistor 210 is easy to leak under light, so the area where the driving transistor 210 is located is usually opaque, that is, the light of the backlight source required by the liquid crystal display panel will penetrate from the pixel area 101, and will not penetrate from the area of ​​the driving transistor 210. The opening of the pixel area 101 refers to the light-transmitting area, and the aperture ratio is the ratio of the area of ​​the light-transmitting area of ​​the pixel area 101 to the total area. In addition, the data signal line 230 and the gate signal line 220 are usually made of metal materials and are also opaque.

[0058] For example, Figure 2 As shown, the support column 300 may include four categories, namely, a first-category support column 301, a second-category support column 302, a third-category support column 303, and a fourth-category support column 304. The orthographic projection of the first-category support column 301 on the array substrate covers the area where the driving transistor 210 is located, the orthographic projection of the second-category support column 302 on the array substrate covers the overlapping area of ​​the data signal line 230 and the gate signal line 220, the orthographic projection of the third-category support column 303 on the array substrate covers the area where the data signal line 230 is located, and the orthographic projection of the fourth-category support column 304 on the array substrate covers the area where the gate signal line 220 is located.

[0059] Illustratively, the display panel provided in the embodiment of the present application may only be provided with one or more of the first type of support column 301, the second type of support column 302, the third type of support column 303 and the fourth type of support column 304, which may be provided according to specific support requirements, and the embodiment of the present application does not make any specific limitation.

[0060] It should be noted that the coverage mentioned in the embodiments of the present application can be full coverage or partial coverage. As long as there is overlap, it can be called coverage.

[0061] It should be noted that in a liquid crystal display panel, when the support column slides due to an external force, the opposite alignment film will be scratched. The scratched position of the alignment film cannot be aligned normally, and the disordered liquid crystal molecules can easily cause light leakage. The light leakage caused by the scratched alignment film usually manifests as uneven display, broken bright spots or red and blue spots. Usually, the support column is arranged on the side of the color film substrate close to the array substrate, and the support column is arranged at the position where the shading structure of the color film substrate is located, and the scratched alignment film is on the side of the array substrate. Therefore, the existing way to solve the light leakage problem caused by the sliding of the support column is usually to enlarge or widen the shading structure to cover the light leakage at the scratched position, but this solution will cause the display pixel opening rate to decrease, reduce the light output rate of the display panel, and reduce the display effect of the display panel.

[0062] In view of the above problems, the display panel provided by the embodiment of the present application is provided with a support column 300 on a side of the array substrate 200 close to the color filter substrate 100, and the orthographic projection of the support column 300 on the array substrate 200 at least partially covers the area where the driving transistor 210 is located, and / or, the orthographic projection of the support column 300 on the array substrate 200 at least partially covers the area where the gate signal line 220 is located, and / or, the orthographic projection of the support column 300 on the array substrate 200 at least partially covers the area where the data signal line 230 is located. The support column 300 is provided in the area where the opaque gate signal line 220, the data signal line 230 or the driving transistor 210 is located, and the light transmittance of the display panel is not affected. In addition, due to the light shielding characteristics of the gate signal line 220, the data signal line 230 or the driving transistor 210, and the position of the top of the support column 300 is the area where the light shielding structure on the color filter substrate 100 is located, scratch light leakage can be improved without increasing the size of the light shielding structure. In addition, since the surface of the color film substrate 100 close to the array substrate 200 is flatter than the surface of the array substrate 200 close to the color film substrate 100, the contact area between the top of the support column 300 and the color film substrate 100 is larger, and the actual base area between the top of the conventional support column and the array substrate is larger, so the support effect is better. On the basis of the same support effect, the top area of ​​the support column 300 can be reduced, so there is no need to increase the size of the shading structure, and the size of the shading structure can even be reduced as the support area of ​​the support column 300 is reduced, so the aperture ratio of the display panel can be further improved, and then the light transmittance of the display panel can be improved, and the display effect can be improved. In addition, since the color film substrate 100 is relatively flat, the support column 300 is arranged on the array substrate 200, and the contact between the support column 300 and the color film substrate 100 is more stable, which can reduce the risk of the support column 300 slipping and scratching the alignment film due to external force, and thus improve the poor light leakage caused by scratches on the support column of the display panel.

[0063] In some embodiments, the driving transistor includes a gate and a source-drain electrode; the orthographic projection of at least one supporting column 300 on the array substrate 200 covers the overlapping area of ​​the gate signal line 220 and the data signal line 230 .

[0064] Exemplary, reference Figure 2 The orthographic projection of the second type of support pillars 302 on the array substrate 200 covers the overlapping area of ​​the gate signal line 220 and the data signal line 230 .

[0065] In some embodiments, the orthographic projection of at least one supporting pillar 300 on the array substrate 200 covers the overlapping region of the gate and the source and drain electrodes.

[0066] For example, Figure 3 This is a schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application. Figure 3 As shown, the driving transistor 210 includes a gate 211, an active layer 212 and a source-drain electrode 213, the source-drain electrode includes a source and a drain, the gate signal line 220 is electrically connected to the gate 211, and the data signal line 230 is electrically connected to the source or the drain of the source-drain electrode 213. The orthographic projection of the support column 300 on the array substrate 200 covers the overlapping area of ​​the gate 211 and the source-drain electrode 213, that is, the support column 300 overlaps with the driving transistor 210, and may further overlap with the gate and the source-drain electrode.

[0067] It should be noted that during the preparation of the array substrate 200, the gate 211 and the gate signal line 220 can be prepared in the same layer, that is, they can be prepared synchronously; the source and drain electrodes 213 and the data signal lines 230 are prepared synchronously. After the source and drain electrodes are prepared and before the pixel electrodes are prepared, an organic flat layer can be provided to flatten the surface of the array substrate 200, which is more conducive to the standing stability of the support column 300.

[0068] For example, Figure 4 A schematic partial cross-sectional structure diagram of another display panel provided in an embodiment of the present application. Figure 4 As shown, the support column 300 overlaps with the data signal line 230 and the source-drain electrode 213 and can be set according to specific support requirements and the range of shading. The present application does not make specific limitations.

[0069] It should be noted that the conventional support column is set on the color film substrate, usually standing on the light shielding structure, the base of the light shielding structure is relatively soft, the support column is not easy to rebound after being compressed by external force, and large-size products are more likely to have defects. In the display panel provided in the embodiment of the present application, the support column 300 stands on the driving transistor 210, the gate signal line 220 or the data signal line 230, and the metal material is relatively hard. The support column 300 is easy to rebound after being compressed by external force, and is not easy to cause defects.

[0070] It should be noted that the support pillars on the traditional color filter substrate side need to undergo a high temperature baking process after preparation, and the pixel electrodes on the array substrate also need a high temperature baking process. In the display panel provided by the embodiment of the present application, after the support pillars 300 are arranged on the array substrate 200, the baking processes of the pixel electrodes and the support pillars 300 can be combined, and the two separate process steps can be combined into one, which can reduce one process step and save production capacity.

[0071] In some embodiments, the geometric center of the orthographic projection of at least one supporting column 300 on the array substrate 200 coincides with the geometric center of the overlapping region of the gate signal line 220 and the data signal line 230 .

[0072] In some embodiments, the geometric center of the orthographic projection of at least one supporting column 300 on the array substrate 200 coincides with the geometric center of the region where the driving transistor 210 is located.

[0073] In some embodiments, the geometric center of the orthographic projection of at least one support column 300 on the array substrate 200 coincides with the geometric center of the overlapping region of the gate 211 and the source-drain electrode 213. The coincidence of the geometric centers can fully utilize the light shielding performance of the gate signal line 220, the data signal line 230 or the driving transistor 210 to avoid affecting the light transmittance of the display panel.

[0074] In some embodiments, the support column 300 includes a first support column and a second support column; in the thickness direction of the array substrate 200, the size of the first support column is larger than the size of the second support column. The first support column can be regarded as a main support column, and the second support column can be regarded as an auxiliary support column. The orthographic projection of the first support column on the array substrate 200 covers the area where the driving transistor 210 is located, and / or, the orthographic projection of the first support column on the array substrate 200 covers the overlapping area of ​​the gate signal line 220 and the data signal line 230. The orthographic projection of the second support column on the array substrate 200 covers the area where the gate signal line 220 is located, and / or, the orthographic projection of the second support column on the array substrate 200 covers the area where the data signal line 230 is located, and / or, the orthographic projection of the second support column on the array substrate 200 covers the area where the driving transistor 210 is located, and / or, the orthographic projection of the second support column on the array substrate 200 covers the overlapping area of ​​the gate signal line 220 and the data signal line 230.

[0075] For example, Figure 5 A schematic partial cross-sectional structure diagram of another display panel provided in an embodiment of the present application. Figure 5As shown, in the thickness direction H of the array substrate 200, the size of the first support column 310 is greater than the size of the second support column 320, that is, the height of the first support column 310 is greater than the height of the second support column 320. When the display panel is squeezed by external force, the first support column 310 can directly play the role of supporting the cell thickness; when the squeezed cell thickness reaches the height of the second support column 320, the second support column 320 can play the role of auxiliary support to prevent the cell thickness of the display panel from being too low, causing display abnormality.

[0076] In some embodiments, the orthographic projection of the first support column 310 on the array substrate 200 covers the area where the driving transistor 210 is located, the orthographic projection of part of the second support column 320 on the array substrate 200 covers the area where the gate signal line 220 is located, and the orthographic projection of part of the second support column 320 on the array substrate 200 covers the area where the driving transistor 210 is located.

[0077] For example, Figure 6 This is a schematic partial structural diagram of another array substrate provided in an embodiment of the present application. Figure 6 As shown, the orthographic projection of the first support column 310 on the array substrate 200 covers the area where the driving transistor 210 is located, and the orthographic projection of the second support column 320 on the array substrate 200 covers the area where the gate signal line 220 is located. Since the size of the second support column 320 can be slightly smaller than the size of the first support column 310, the second support column 320 can be arranged in the area where the gate signal line 220 is located.

[0078] In some embodiments, the support column further includes a third support column; in the thickness direction of the array substrate, the size of the second support column is larger than the size of the third support column; the orthographic projection of the third support column on the array substrate covers the area where the gate signal line is located, and / or, the orthographic projection of the third support column on the array substrate covers the area where the data signal line is located, and / or, the orthographic projection of the third support column on the array substrate covers the area where the driving transistor is located, and / or, the orthographic projection of the third support column on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line. The third support column and the second support column can be used together as auxiliary support columns, and the height of the third support column is less than the height of the second support column. Then, the support column can be presented as a three-stage height difference setting, which can better support the box thickness and provide a better buffering support effect against external force squeezing the box thickness.

[0079] For example, Figure 7 This is a schematic partial cross-sectional structure diagram of a display panel provided in an embodiment of the present application. Figure 7 As shown, in the thickness direction H of the array substrate 200 , the size of the first support column 310 is larger than the size of the second support column 320 , and the size of the second support column 320 is larger than the size of the third support column 330 .

[0080] For example, one first support column 310, 18 second support columns 320, and 18 third support columns 330 may be arranged in an average of 36 pixel regions 101. The second support columns 320 and the third support columns 330 may be arranged alternately, that is, the second support columns 320 and the third support columns 330 may be arranged alternately, which may better play the role of auxiliary support.

[0081] For example, Figure 8 This is a schematic partial structural diagram of another array substrate provided in an embodiment of the present application. Figure 8 As shown, the first support column 310 is arranged in the area where the driving transistor 210 is located, and the first support column 310 partially covers the overlapping area of ​​the data signal line 230 and the gate signal line 220. The second support column 320 is arranged in the area where the gate signal line 220 is located. Since the line width of the gate signal line 220 is generally greater than the line width of the data signal line 230, the gate signal line 220 has enough light shielding space to set the second support column.

[0082] For example, a product is designed for the Z architecture, that is, Figure 8 The driving transistors 210 between the upper and lower adjacent pixels are arranged on both sides of the same data signal line 230, and the driving transistors 210 in two adjacent rows are not arranged on the same side. The first support column 310 is arranged in the area where the driving transistor 210 is located, and the remaining shorter auxiliary support columns can be arranged in the area where the gate signal line 220 is located. In addition, some second support columns 320 can be arranged in the area where the driving transistor 210 is located. Due to the difference in film layer structure, the metal layer where the driving transistor 210 and the gate signal line 220 are located will form a height difference of about 0.2 to 0.4 μm. After the support column is made, the second support column 320 and the third support column 330 will still have a height difference of about 0.1 to 0.2 μm. Combined with the first support column 310, a three-stage support column arrangement can be formed, that is, the first support column 310 is used as the main support column, and the second support column 320 and the third support column 330 are used as auxiliary support columns of two heights. The three-stage support column has better pressure resistance than the two-stage one. That is, when the metal wire where the support column is located fluctuates with the process, the two-stage support column is similar to a large speed bump. After the support column is compressed, the deformation of the screen is large, and the thickness of the liquid crystal box of the display panel fluctuates greatly, which makes black spots and blue spots prone to occur. The three-stage support column will be like two small speed bumps, using the elasticity of the support column to reduce the fluctuation of the thickness of the liquid crystal box when under pressure, thereby improving problems such as pressure-induced black spots and blue spots.

[0083] It should be noted that the height of the second support column 320 and the third support column 330 are both smaller than the height of the first support column 310. Usually, the smaller the height, the smaller the end area. Exemplarily, the end area of ​​the second support column 320 and the third support column 330 close to the color film substrate 100 is smaller than the end area of ​​the first support column 310 close to the color film substrate 100; the end area of ​​the second support column 320 and the third support column 330 away from the color film substrate 100 is smaller than the end area of ​​the first support column 310 away from the color film substrate 100.

[0084] In some embodiments, the ratio of the effective support density of the first support column 310 to the support end surface density is greater than or equal to 90%; wherein the effective support density is the actual contact density between one end of all the first support columns close to the color film substrate and the color film substrate, the actual contact density is the actual contact area divided by the area of ​​the display area of ​​the display panel, and the support end surface density is the end area of ​​all the first support columns close to the color film substrate divided by the area of ​​the display area.

[0085] In some embodiments, Fig. 9 This is a schematic partial cross-sectional structural diagram of another display panel provided in an embodiment of the present application. Fig. 9 As shown, the display panel further includes: a liquid crystal layer 400, which is disposed between the array substrate 200 and the color filter substrate 100; the color filter substrate 100 includes a light shielding structure BM and a color filter film 110, and the light shielding structure BM is disposed between adjacent color filter films 110; illustratively, the color filter film 110 includes a blue filter film b and a green filter film g. The orthographic projection of the support column 300 on the color filter substrate 100 falls into the area where the light shielding structure BM is located.

[0086] Exemplary, reference Fig. 9 The color filter film 110 is also provided with an optical adhesive layer OC and an alignment film PI on one side close to the array substrate 200, and an alignment film is also provided on the array substrate 200. It should be noted that different color filter films 110 generally have different thicknesses, and the optical adhesive layer OC is mainly used to flatten and protect the color filter film 110.

[0087] It should be noted that the actual contact area between the end of the support column 300 close to the color film substrate 100 and the color film substrate 100 will effectively play a supporting role. Since the first support column 310 acts as the main support column and has the highest height, the first support column 310 needs to contact the color film substrate 100 when the display panel is not squeezed by the outside world, and the actual contact area is the effective contact area, which is also the effective support area. However, in the traditional display panel, the support column is arranged on one side of the color film substrate, and the actual contact area between the support column and the array substrate is affected by the flatness of the surface of the array substrate. Therefore, the ratio of the actual contact area between the existing support column and the array substrate to the total area of ​​the end face of the support column is between 30% and 50%. In order to ensure that the effective contact area of ​​the support column is sufficient, the area of ​​the contact end face of the support column needs to be enlarged. After the end face of the support column is enlarged, in order to ensure that the support column is scratched and light leakage is blocked, the size of the shading structure needs to be enlarged, which will cause the aperture ratio of the display panel to decrease and affect the light transmittance of the display panel. To address this problem, the display panel provided in the embodiment of the present application sets the support column 300 on the array substrate 200, and the end face of the support column 300 contacts the color film substrate 100. Since the film layer structure of the color film substrate 100 is simple and the surface is flatter, the ratio of the actual contact area between the end face of the first support column 310 and the color film substrate 100 to the end face area can reach 90% or above. Under the condition of the same effective support area, the end area of ​​the first support column 310 in the embodiment of the present application does not need to be increased, and can even be appropriately reduced. The occupied area space of the first support column 310 can be appropriately reduced accordingly, and the size of the shading structure BM can be appropriately reduced, which will not affect the aperture ratio, and can even increase the aperture ratio, thereby improving the light transmittance of the display panel.

[0088] For example, the aperture ratio of the pixel area is mainly affected by the size and position of the auxiliary support column and its corresponding light shielding structure BM in addition to the design of the array substrate 200. Taking a 15.6-inch FHD (Full High Definition) product as an example, in the two-stage support column setting, that is, the support column includes two heights of support columns, the top density of the original design auxiliary support column is 32912μm 2 / mm 2 , that is, the area ratio of the top of the auxiliary support column on the plane, the actual contact density of the array substrate is 14021μm 2 / mm 2 , that is, the area ratio of the top of the auxiliary support column on the array substrate. Because there are vertical and horizontal grooves on the drive device of the array substrate, the auxiliary support column cannot fully contact the side of the array substrate, so the actual contact area is 40 to 50% smaller than the top area density of the support column. The actual contact area of ​​the auxiliary support column is the contact area of ​​the display panel when it is squeezed.

[0089] To address this problem, the support column 300 of the embodiment of the present application is disposed in the overlapping region of the gate electrode and the source-drain electrode, and the support column 300 is supported on the optical adhesive layer OC on the side of the color filter substrate 100. For example, Fig.10 A position relationship diagram of a support column provided in an embodiment of the present application. Fig.10 As shown, the support column 300 is arranged in the overlapping area of ​​the gate signal line 220 and the data signal line 230, which can also be regarded as the area where the driving transistor is located. The boundary of the existing shading structure projected on the array substrate can be represented as the first boundary BM1, and the boundary of the shading structure provided in the embodiment of the present application projected on the array substrate can be represented as the second boundary BM2; the boundary of the existing support column projected on the array substrate near one end of the array substrate is the third boundary PS1, and the boundary of the support column provided in the embodiment of the present application projected on the array substrate near one end of the color film substrate is the fourth boundary PS4. The boundaries of the existing shading structure and the support column are represented by dotted lines, and the boundaries of the support column and the shading structure of the embodiment of the present application are represented by solid lines. Fig.10 It can be seen that the support column provided in the embodiment of the present application is arranged on one side of the array substrate, and the size of the support column can be reduced without affecting the supporting effect, thereby reducing the size of the light shielding structure, increasing the aperture ratio, and improving the light transmittance of the display panel. For example, the size of the top end face of the support column can be reduced from 22μm in the original design to 13μm, and the corresponding BM shielding position will also be reduced. Through calculation, it can be seen that the pixel aperture ratio can be increased by 4%.

[0090] In some embodiments, Fig.11 A schematic partial cross-sectional structure diagram of another display panel provided in an embodiment of the present application. Fig.11 As shown, the end of the first support column 310 close to the color filter substrate 100 is arranged in the gap formed between the adjacent color filter films 110 at the corresponding position. The orthographic projections of the adjacent color filter films 110 corresponding to the first support column 310 on the array substrate 200 do not overlap, so a certain gap space is formed. The step difference in the gap can be used to accommodate the end of the first support column 310 close to the color filter substrate 100, and the color filter film 110 around the first support column 310 forms a retaining wall; the retaining wall is formed by the film layer segment of the color filter film 110 and the light shielding structure BM. In the thickness direction H of the array substrate 200, the ratio of the size H1 of the retaining wall to the size H2 of the first support column is less than or equal to 1 / 3.

[0091] For example, Fig.12 This is a schematic structural diagram of a display panel provided in an embodiment of the present application. Fig.12As shown, the color filter film includes a blue filter film b, a green filter film g and a red filter film r. The color filter film surrounding the support column 300 includes a blue filter film b and a red filter film r. The transmittance of the blue filter film b is about 10%, the transmittance of the green filter film g is about 60%, and the transmittance of the red filter film r is about 30%. The transmittance of the blue filter film b and the red filter film r is relatively small. In the case of light leakage due to scratches on the alignment film, the light leakage transmittance is also small, which can reduce the visibility of the light leakage. In addition, the transmittance of the blue filter film b and the red filter film r is relatively small, and the occupied area is also small. Setting the support column 300 between the two can reduce the impact on the aperture ratio.

[0092] Exemplarily, the top of the first support column 310 is set in the retaining wall. When the display panel is squeezed by external force, the first support column is not easy to slide, which can reduce the scratches on the alignment film PI and reduce the display unevenness and red and blue spots caused by scratches on the alignment film. Taking the 15.6-inch FHD product as an example, the thickness of the color filter film 110 is 2μm, and the thickness of the OC is 1.3μm. After the OC is flattened, the height difference between the color filter film 110 and the shading structure BM in the plane is reduced to about 0.5μm. The outer diameter of the top of the first support column 310 can be reduced from 13μm to 8μm. Considering the alignment accuracy of the array substrate 200 and the color film substrate 100 is 5.0, it is equivalent to the first support column 310 being placed in a flat pit with a diameter of 18μm on the side of the color film substrate 100. The first support column 310 is surrounded by a retaining wall, and the height of the retaining wall is approximately 1 / 4 of the height of the first support column 310, which effectively prevents the first support column 310 from sliding, thereby improving the display defects caused by sliding scratches on the alignment film.

[0093] In some embodiments, in the thickness direction of the array substrate, the size of the first support column is the thickness of the liquid crystal layer corresponding to the area where the first support column is located minus the thickness of the gate, the thickness of the source and drain electrodes, and the difference in thickness between the light shielding structure and the color filter film. The height dimension of the first support column here can be regarded as an absolute height.

[0094] For example, taking a 15.6-inch FHD product as an example, the liquid crystal cell thickness of the display panel is designed to be 3.0 μm, and the cell thickness can be understood as the thickness of the liquid crystal layer between the array substrate 200 and the color filter substrate 100. The film thickness of the source and drain electrode 213 is 0.56 μm, and the thickness of the gate 211 is 0.36 μm. Considering the influence of the film thickness step difference on one side of the color filter substrate 100 such as the light shielding structure BM and the color filter film 110, the height of the first support column 310 relative to the opening area of ​​the pixel area is required to be 2.6 μm, that is, the absolute height of the first support column 310 is 1.68 μm = 2.6-0.56-0.36. The height of the first support column 310 is reduced, and the uniformity of the first support column 310 during the manufacturing process will be improved, which can improve the uniformity of the display effect of the display panel and avoid the occurrence of many display defects.

[0095] According to a second aspect of the embodiments of the present application, a display device is provided. Fig.13 Schematic diagram of a display device provided in an embodiment of the present application. Fig.13 As shown, the display device includes: the display panel 1000 as described in the first aspect.

[0096] It should be noted that the display device provided in the embodiments of the present application may include displays such as smart phones, tablet computers, laptop computers, and televisions.

[0097] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0099] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0100] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A display panel, characterized in that: include: Color film substrate; An array substrate, arranged opposite to the color filter substrate, the array substrate comprising a driving transistor, a gate signal line and a data signal line, the gate signal line and the data signal line are both electrically connected to the driving transistor; A plurality of supporting columns are arranged on one side of the array substrate close to the color filter substrate; The orthographic projection of the support pillar on the array substrate at least partially covers the area where the driving transistor is located and / or the area where the gate signal line is located and / or the area where the data signal line is located; The support column comprises a first support column and a second support column; In the thickness direction of the array substrate, the size of the first supporting column is greater than the size of the second supporting column; The ratio of the effective support density of the first support column to the support end surface density is greater than or equal to 90%; Among them, the effective support density is the actual contact density between one end of all the first support columns close to the color film substrate and the color film substrate, the actual contact density is the actual contact area divided by the area of ​​the display area of ​​the display panel, and the support end surface density is the end area of ​​all the first support columns close to one end of the color film substrate divided by the area of ​​the display area.

2. The display panel according to claim 1, characterized in that: The driving transistor includes a gate and a source-drain electrode; The orthographic projection of at least one of the support pillars on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line; and / or, An orthographic projection of at least one of the supporting pillars on the array substrate covers an overlapping region between the gate and the source-drain electrode.

3. The display panel according to claim 2, characterized in that: The geometric center of the orthographic projection of at least one of the support pillars on the array substrate coincides with the geometric center of the overlapping area of ​​the gate signal line and the data signal line; and / or, The geometric center of the orthographic projection of at least one of the support pillars on the array substrate coincides with the geometric center of the region where the driving transistor is located; and / or, The geometric center of the orthographic projection of at least one of the support pillars on the array substrate coincides with the geometric center of the overlapping region of the gate and the source-drain electrode.

4. The display panel according to claim 1, characterized in that: The orthographic projection of the first supporting column on the array substrate covers the area where the driving transistor is located, and / or the orthographic projection of the first supporting column on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line; The orthographic projection of the second supporting column on the array substrate covers the area where the gate signal line is located, and / or, the orthographic projection of the second supporting column on the array substrate covers the area where the data signal line is located, and / or, the orthographic projection of the second supporting column on the array substrate covers the area where the driving transistor is located, and / or, the orthographic projection of the second supporting column on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line.

5. The display panel according to claim 4, characterized in that: The orthographic projection of the first supporting column on the array substrate covers the area where the driving transistor is located, the orthographic projection of part of the second supporting column on the array substrate covers the area where the gate signal line is located, and the orthographic projection of part of the second supporting column on the array substrate covers the area where the driving transistor is located.

6. The display panel according to claim 1, characterized in that: The support column also includes a third support column; In the thickness direction of the array substrate, the size of the second supporting column is greater than the size of the third supporting column; The orthographic projection of the third support column on the array substrate covers the area where the gate signal line is located, and / or, the orthographic projection of the third support column on the array substrate covers the area where the data signal line is located, and / or, the orthographic projection of the third support column on the array substrate covers the area where the driving transistor is located, and / or, the orthographic projection of the third support column on the array substrate covers the overlapping area of ​​the gate signal line and the data signal line.

7. The display panel according to claim 6, characterized in that: The second supporting column and the third supporting column are arranged at intervals from each other.

8. The display panel according to claim 1, characterized in that: Also includes: A liquid crystal layer, disposed between the array substrate and the color filter substrate; The color filter substrate comprises a light shielding structure and a color filter film, wherein the light shielding structure is arranged between adjacent color filter films; The orthographic projection of the support column on the color filter substrate falls into the area where the light shielding structure is located.

9. The display panel according to claim 8, characterized in that: One end of the first supporting column close to the color filter substrate is arranged in a gap formed between adjacent color filter films at corresponding positions.

10. The display panel according to claim 9, characterized in that: The color filter film surrounding the first support column forms a retaining wall; In the thickness direction of the array substrate, a ratio of a size of the retaining wall to a size of the first supporting column is less than or equal to 1 / 3.

11. The display panel according to claim 9, characterized in that: The driving transistor comprises a gate and a source-drain electrode, and the orthographic projection of the first supporting column on the array substrate covers the overlapping area of ​​the gate and the source-drain electrode; In the thickness direction of the array substrate, the size of the first support column is the thickness of the liquid crystal layer corresponding to the area where the first support column is located minus the thickness of the gate, the thickness of the source and drain electrodes, and the difference in thickness between the shading structure and the color filter film.

12. The display panel according to claim 8, characterized in that: The color filter film surrounding the support column includes a blue filter film and a red filter film.

13. A display device, characterized in that: include: A display panel as claimed in any one of claims 1 to 12.

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