Fabrication method of color filter substrate, color filter substrate and display device

A fabrication method of a color filter substrate, a color filter substrate and a display device are provided. The fabrication method includes forming an interlayer insulating layer and a first color filter group above the conductive pattern, wherein, the first color filter group includes color filter(s) of at least one color, the interlayer insulating layer and the first color filter group are formed by a same material; the interlayer insulating layer is configured to electrically insulate the conductive connecting portion from the conductive bridging portion.

This application claims priority to and the benefit of Chinese Patent Application No. 201610069573.9 filed on Feb. 1, 2016, which application is incorporated herein in its entirety.

TECHNICAL FIELD

Embodiments of the present disclosure relate to a fabrication method of a color filter substrate, a color filter substrate and a display device.

BACKGROUND

A display screen (touch screen) having a touch function has been more and more widely used. And a capacitive touch screen is an important form of the touch screen. The capacitive touch screen is provided with a plurality of driving electrodes and sensing electrodes intersecting with each other, and a capacitance is formed in an adjacent position of the two types of electrodes; the respective driving electrodes load driving signals in a manner of scanning, and the sensing electrodes accordingly generate sensing signals; and when there is a touch, a human body or a touch pen gets close to a touch region, the capacitance between the two types of electrodes in the region is affected, the sensing signals of the corresponding sensing electrodes are changed, so that a touch position can be determined.

SUMMARY

An embodiment of the present disclosure provides a fabrication method of a color filter substrate, including: forming a conductive pattern above an upper surface of a base substrate, the conductive pattern including two first electrode blocks arranged in a first direction, two second electrode blocks arranged in a second direction intersecting with the first direction, and a conductive connecting portion for connecting the two first electrode blocks; forming an interlayer insulating layer and a first color filter group above the conductive pattern, wherein, the first color filter group includes color filter(s) of at least one color, the interlayer insulating layer and the first color filter group are formed by a same material; and forming a conductive bridging portion for connecting the two second electrode blocks above the interlayer insulating layer, wherein, the interlayer insulating layer is configured to electrically insulate the conductive connecting portion from the conductive bridging portion.

Another embodiment of the present disclosure provides a color filter substrate, including: a base substrate; a conductive pattern located above an upper surface of the base substrate, including two first electrode blocks arranged in a first direction, two second electrode blocks arranged in a second direction intersecting with the first direction, and a conductive connecting portion for connecting the two first electrode blocks; an interlayer insulating layer and a first color filter group located above the conductive pattern, wherein, the first color filter group includes color filter(s) of at least one color, the interlayer insulating layer and the first color filter group are formed by a same material; and a conductive bridging portion located above the interlayer insulating layer and configured for connecting the two second electrode blocks, wherein, the interlayer insulating layer is configured to electrically insulate the conductive connecting portion from the conductive bridging portion.

Yet another embodiment of the present disclosure provides a display device, including the color filter substrate described above.

DETAILED DESCRIPTION

In a structure of a related capacitive touch screen, driving electrodes include first electrode blocks arranged in a row, sensing electrodes include second electrode blocks arranged in a same layer with the first electrode blocks, and a connecting portion for connecting two adjacent second electrode blocks. An interlayer insulating layer is arranged above the connecting portion, a bridging portion is arranged above the interlayer insulating layer and used for connecting two adjacent second electrode blocks. But the inventors have found that the interlayer insulating layer arranged between the bridging portion and the connecting portion needs to be prepared by a separate preparation process, resulting in high process cost.

As for the above problems in the related capacitive touch screen, embodiments of the present disclosure provide a fabrication method of a color filter substrate, a color filter substrate and a display device, which are simple in process and low in cost.

The technical solutions of the embodiments of the present disclosure will be described in a clearly and fully understandable way in connection with the drawings. It is obvious that the described embodiments are just a part but not all of the embodiments of the present disclosure. Based on the described embodiments herein, those skilled in the art can obtain other embodiment(s), without any inventive work, which should be within the scope of the present disclosure.

In conjunction with what are shown inFIGS. 1 to 7, the embodiment provides a fabrication method of a color filter substrate, including steps of preparing a plurality of driving electrode rows and a plurality of sensing electrode columns, wherein, each of the driving electrode rows and each of sensing electrode columns intersect with each other; each of the sensing electrode columns includes a plurality of first sensing electrode blocks1(i.e., the first electrode blocks1are sensing electrode blocks), and a conductive connecting portions11for connecting every two adjacent first electrode blocks1; and each of the driving electrode rows includes a plurality of second electrode blocks (i.e., the second electrode blocks2are driving electrode blocks), and a conductive bridging portion21for bridging two adjacent second electrode blocks2. Here, for example, the plurality of first electrode blocks1and the plurality of second electrode blocks2as well as the connecting portion11for connecting the two adjacent first electrode blocks1are located in a same layer, and the bridging portion21for bridging the two adjacent second electrode blocks2is located in another layer. Of course, in another embodiment, it may also be that, the two adjacent second electrode blocks2are connected by a connecting portion located in a same layer, and the two adjacent first electrode blocks1are connected by a bridging portion located in different layers.

In the fabrication method of the color filter substrate in the present disclosure, an interlayer insulating layer between the connecting portion and the bridging portion can be also formed together with a color filter of at least one color synchronously, so that process steps and production cost can be reduced.

Here, the fabrication method of the embodiment is described by only taking an example that the two adjacent first electrode blocks1are connected by the connecting portion11and the two adjacent second electrode blocks2are connected by the bridging portion21.

The color filter substrate, for example, includes color filters of N different colors; color filters of M different colors are formed while the interlayer insulating layer is formed; a protruding portion is formed above a bridging portion21after the bridging portion21is formed, and color filters of other K different colors are formed while the protruding portion is formed; where, M+K=N. Here, M, K and N are nonzero integers, for example, N≥3, M≥1, and K≥1. In the embodiment, it is described by taking an example of N=3, K=1 or 2, color filters of three different colors are a red filter5, a green filter6and a blue filter, respectively. However, it is not limitative to the embodiment, and they may also be color filters of other colors or more colors.

As a first implementation mode of the embodiment, as shown in conjunction withFIGS. 1 and 5, the fabrication method of the color filter substrate, for example, including steps of:

Step1: forming a pattern of a black matrix3on a base substrate10by a patterning process, the pattern of the black matrix3defining a plurality of pixel regions on the color filter substrate.

Step2: forming a first transparent electrode layer (ITO) on the base substrate10where step1has been completed, and forming a pattern including a plurality of first electrode blocks1, a plurality of second electrode blocks2and connecting portions11for connecting two adjacent first electrode blocks1; wherein, the plurality of first electrode blocks1are arranged in columns. A sensing electrode is formed by the first electrode blocks1located in a same column and the connecting portions11connecting the first electrode blocks1located in the same column. Since the respective connecting portions11are located above the black matrix3, display may be not affected.

Step3: depositing a first color resisting layer (e.g., a red color filter layer) on the base substrate10where step2has been completed, and forming a pattern including a red filter5and an interlayer insulating layer4located above the respective connecting portions11by a patterning process. Thus, the interlayer insulating layer4and the red color filter5are located in a same layer. The formed interlayer insulating layer4is disconnected from the red filter5adjacent thereto, and the second electrode block2is exposed at a disconnected position. It should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

Step4: forming a second transparent conductive layer on the base substrate10where step3has been completed, and forming a pattern including bridging portions21for bridging every two adjacent second electrode blocks2located in a same row by a patterning process. So far, preparations of the driving electrodes and the sensing electrodes are completed.

Step5: depositing a second color resisting layer (e.g., a green color filter layer) on the base substrate10where step4has been completed, and forming a pattern including a green filter6by a patterning process.

Step6: depositing a third color resisting layer (e.g., a blue color filter layer) on the base substrate10where step5has been completed, and forming a pattern including a blue filter by a patterning process.

In summary, the interlayer insulating layer4between the connecting portion11and the bridging portion21are synchronously formed with the red color filter5, so that process steps may be saved and production cost may be reduced.

In the fabrication method, for example, with reference toFIG. 5, first protruding portions61above the respective bridging portions21can be formed together with the green filter6when patterning the second color resisting layer in step5, and thus the green filter6and the first protruding portion61are located in a same layer. The green filter6and the first protruding portion61are arranged apart from each other. A second protruding portion71above the first protruding portion61can be formed together with the blue filter when patterning the third color resisting layer in step6, and thus the blue filter and the second protruding portion71are located in a same layer. The blue filter and the second protruding portion71are arranged apart from each other. In a direction perpendicular to an upper surface of the base substrate10, the interlayer insulating layer4, the first protruding portion61and the second protruding portion71are stacked sequentially. That is, vertical projections of the interlayer insulating layer4, the first protruding portion61and the second protruding portion71on the upper surface of the base substrate10overlap with each other. In this case, a sum of thicknesses of the first protruding portion61and the second protruding portion71and the interlayer insulating layer4may exactly meet a need of a height of a spacing pillar, and therefore, it is not necessary to prepare the spacing pillar separately in the method, so that a further process step may be saved and production cost may be reduced. It should be understood that, the interlayer insulating layer4and the red filter5are made of a same material, so that the interlayer insulating layer is red; the first protruding portion61and the green filter6are made of a same material, so that the first protruding portion61is green; the second protruding portion71and the blue filter are made of a same material, so that the second protruding portion71is blue; Thus, the interlayer insulating layer4, the first protruding portion61and the second protruding portion71sequentially located above the connecting portion11are superimposed, which is equivalent to superimpose the red, green and blue filters on this position, so that light transmittance at the position is very low. In an example, the black matrix3may be omitted below the connecting portion11, thereby saving a further process step and reducing production cost. Of course, light leakage may be better avoided by reserving the black matrix3.

It should be noted here that, in another implementation mode of the embodiment, the interlayer insulating layer may be synchronously formed with the green filter6or the blue filter, and a corresponding method is similar to the method described above, which will be not described here in detail.

As a second implementation mode of the embodiment, as shown in conjunction withFIGS. 2 and 6, the fabrication method of the color filter substrate, for example, including steps of:

Step1: forming a pattern of a black matrix3on a base substrate10by a patterning process, the pattern of the black matrix3defining a plurality of pixel regions on the color filter substrate.

Step2: forming a first transparent electrode layer (ITO) on the base substrate10where step1has been completed, and forming a pattern including a plurality of first electrode blocks1, a plurality of second electrode blocks2and connecting portions11for connecting two adjacent first electrode blocks1; wherein, the plurality of first electrode blocks are arranged in columns, and a sensing electrode is formed by the first electrode blocks1located in a same column and the connecting portions11for connecting the first electrode blocks1located in the same column. Since the respective connecting portions11are located above the black matrix3, display may be not affected.

Step3: depositing a first color resisting layer (e.g., a red color filter layer) on the base substrate10where step2has been completed, and forming a pattern including a red filter5and a first sub interlayer insulating layer41(a first sub layer structure of the interlayer insulating layer4) located above each of the connecting portions11by a patterning process. Thus, the first sub interlayer insulating layer41and the red filter5are located in a same layer, wherein, the formed first sub interlayer insulating layer41is disconnected from the red filter5adjacent thereto, and the second electrode block2is exposed at a disconnected position. It should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

Step4: depositing a second color resisting layer (e.g., a green filter layer) on the base substrate10where step3has been completed, and forming a pattern including a green filter6and a second sub interlayer insulating layer42(a second sub layer structure of the interlayer insulating layer4) located above each of the first sub interlayer insulating layers41by a patterning process. Thus, the second sub interlayer insulating layer42and the green filter6are located in a same layer, wherein the formed second sub interlayer insulating layer42is disconnected from the green filter6and the red filter5, and the second electrode block2is exposed at the disconnected position. It should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

Step5: forming a second transparent conductive layer on the base substrate10where step4has been completed, and forming a pattern of bridging portions21for bridging every two adjacent second electrode blocks2located in a same row by a patterning process. So far, preparations of the driving electrode and the sensing electrode are completed.

Step6: depositing a third color resisting layer (e.g., a blue color filter layer) on the base substrate10where step5has been completed, and forming a pattern including a blue filter by a patterning process.

In summary, the interlayer insulating layer4(including the first sub interlayer insulating layer41and the second sub interlayer insulating layer42) between the connecting portion11and the bridging portion21are formed with the red color filter5and the green filter6synchronously, so that a process step can be saved and production cost may be reduced.

In the fabrication method, a protruding portion8above the interlayer insulating layer4is formed together with the blue filter by the patterning the third color resisting layer in step6. Thus, the protruding portion8and the blue filter are located in a same layer. With reference toFIG. 6, the first sub interlayer insulating layer41and the second sub interlayer insulating layer42as well as the protruding portion8are arranged sequentially in a direction perpendicular to an upper surface of the substrate10, that is, vertical projections of the first sub interlayer insulating layer41and the second sub interlayer insulating layer42as well as the protruding portion8on the base substrate10overlap with each other. In this case, a sum of thicknesses of the protruding portion8and the first sub interlayer insulating layer41and the second sub interlayer insulating layer42may exactly meet a need of a height of a spacing pillar. Therefore, it is not necessary to prepare the spacing pillar separately in the method, so that a further process step may be saved and production cost may be reduced. It should be understood that, the first sub interlayer insulating layer41and the red filter5are made of a same material, so that the first sub interlayer insulating layer41is red; the second sub interlayer insulating layer42and the green filter6are made of a same material, so that the second sub interlayer insulating layer42is green; the protruding portion8and the blue filter are made of a same material, so that the protruding portion8is blue. Thus, the first sub interlayer insulating layer41, the second sub interlayer insulating layer42and the protruding portion8sequentially located above the connecting portion11are superimposed, which is equivalent to superimpose the red, green and blue filters on this position, so that light transmittance at the position is very low, and the black matrix3may be not arranged below the connecting portion11, thereby saving a further process step and reducing production cost, and of course, the black matrix3may be also arranged, which may maximally avoid light leakage.

It should be noted here that, in another implementation mode of the embodiment, the interlayer insulating layer may be formed with the green filter and blue filters or the blue filter and red filter5synchronously, and corresponding method is similar to the method described above, which will be not described here in detail.

As a third implementation mode of the embodiment, as shown in conjunction withFIGS. 3 and 7, the fabrication method of the color filter substrate, for example, including steps of:

Step1: forming a pattern of a black matrix3on a base substrate10by a patterning process, the pattern of the black matrix3defining a plurality of pixel regions on the color filter substrate.

Step2: forming a first transparent electrode layer (ITO) on the base substrate10where step1has been completed, and forming patterns including a plurality of first electrode blocks1, a plurality of second electrode blocks2and connecting portions11for connecting two adjacent first electrode blocks1; wherein, the plurality of first electrode blocks are arranged in columns, and a sensing electrode is formed by the first electrode blocks1located in a same column and the connecting portions11for connecting the first electrode blocks1located in the same column. Since each connecting portion11is located above the black matrix3, display may be not affected.

Step3: depositing a first color resisting layer (e.g., a red color filter layer) on the base substrate10where step2has been completed, and forming a pattern including a red filter5and first sub interlayer insulating layers41(first sub layer structure of the interlayer insulating layer4) respectively located above the connecting portions11by a patterning process. Thus, the first sub interlayer insulating layers41and the red filter5are located in a same layer, wherein, the formed first sub interlayer insulating layers41are disconnected from the red filter5adjacent thereto, and the second electrode block2is exposed at a disconnected position, and it should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

Step4: depositing a second color resisting layer (e.g., a green filter layer) on the base substrate10where step3has been completed, and forming a pattern including a green filter6and a second sub interlayer insulating layers42(second sub layer structure of the interlayer insulating layer4) respectively located above the first sub interlayer insulating layers41by a patterning process. Thus, the second sub interlayer insulating layers42and the green filter6are located in a same layer, wherein, the formed second sub interlayer insulating layer42are disconnected from the green filter6and the red filter5, and the second electrode block2is exposed at the disconnected position, and it should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

Step5: depositing a third color resisting layer (e.g., a blue filter layer) on the base substrate10where step4has been completed, and forming a pattern including a blue filter and third sub interlayer insulating layers43(third sub layer structure of the interlayer insulating layer4) respectively located above the second sub interlayer insulating layers42by a patterning process. Thus, the third sub interlayer insulating layers43and the blue filter are located in a same layer, wherein, the formed third sub interlayer insulating layer43are disconnected from the green filter6, the red filter5and the blue filter, and the second electrode block2is exposed at the disconnected position; and it should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

Step6: forming a second transparent conductive layer on the base substrate10where step5has been completed, and forming a pattern of bridging portions21for bridging every two adjacent second electrode blocks2located in a same row by a patterning process. So far, preparations of the driving electrode and the sensing electrode are completed.

In conclusion, the interlayer insulating layer between the connecting portion11and the bridging portion21is formed with the red color filter5and the green filter6as well as the blue filter synchronously, so that a process step may be saved and production cost may be reduced.

In the fabrication method, a sum of thicknesses of the first sub insulating layer41and the second sub insulating layer42and the third sub interlayer insulating layer43may exactly meet a need of a height of a spacing pillar, and therefore, it is not necessary to prepare the spacing pillar separately in the method, so that a further process step may be saved and production cost may be reduced. It should be understood that, the first sub interlayer insulating layer41and the red filter5are made of a same material, so that the first sub interlayer insulating layer41is red; the second sub interlayer insulating layer42and the green filter6are made of a same material, so that the second sub interlayer insulating layer42is green; the third sub interlayer insulating layer43and the blue filter are made of a same material, so that the third sub interlayer insulating layer43is blue, and thus the first sub interlayer insulating layer41, the second sub interlayer insulating layer42and the third sub interlayer insulating layer43sequentially located above the connecting portion11are superimposed, which is equivalent to superimpose the red, green and blue filters on here, so that light transmittance at the position is very low, and it is not necessary to arrange the black matrix3below the connecting portion11, thereby saving a further process step and reducing production cost, and of course, the black matrix3may be also arranged, which may better avoid light leakage.

In conjunction with what are shown inFIGS. 4 to 7, the embodiment provides a color filter substrate, including a plurality of driving electrode rows and a plurality of sensing electrode columns, wherein, the driving electrode rows intersect with the sensing electrode columns; each of the driving electrode rows includes a plurality of first electrode blocks1, and conductive connecting portions11for connecting two adjacent first electrode blocks1; and each of the driving electrode columns includes a plurality of second electrode blocks2, and conductive bridging portions21for bridging two adjacent second electrode blocks2. In another example, it may also be that, the two adjacent second electrode blocks2are connected by a connecting portion11, and the two adjacent first electrode blocks1are connected by a bridging portion21. In the embodiment, the fabrication method of the embodiment is described by only taking an example that the two adjacent first electrode blocks1are connected by the connecting portion11and the two adjacent second electrode blocks2are connected by the bridging portion21.

Herein, the color filter substrate includes color filters of N different colors; color filters of M different colors are formed while the interlayer insulating layer is formed; a protruding portion is formed above a bridging portion after the bridging portion is formed, and color filters of other K different colors are formed while the protruding portion is formed; wherein, M+K=N. In the embodiment, it is described by taking an example of N=3, K=1 or 2; color filters of three different colors are a red filter5, a green filter6and a blue filter, respectively. However, it is not limitative to the embodiment, and they may also be color filters of other colors or more colors.

As a first structure of the embodiment, as shown inFIG. 5, the color filter substrate, for example, includes parts of:

a base substrate10,

a black matrix3arranged on the base substrate10, the black matrix3defining a plurality of pixel regions.

a plurality of first electrode blocks1, a plurality of second electrode blocks2, and a connecting portion11for connecting two adjacent first electrode blocks1, located in a same layer and arranged above a layer where the black matrix3is located; wherein, the plurality of first electrode blocks1are arranged in columns, and a sensing electrode is formed by the first electrode blocks1located in a same column and the connecting portions11for connecting the first electrode blocks1located in the same column. Since each connecting portion11is located above the black matrix3, display may be not affected.

a red filter5and an interlayer insulating layer4, arranged above a layer where the plurality of first electrode blocks1, the plurality of second electrode blocks2and the connecting portion11for connecting the every two adjacent first electrode blocks1are located, the interlayer insulating layer4being located directly above the respective connecting portions11; wherein, the formed interlayer insulating layer4is disconnected from the red filter5adjacent thereto, and the second electrode block2is exposed at a disconnected position. It should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

bridging portions21, for bridging every two adjacent second electrode blocks2located in a same row, and arranged above a layer where the red filter5and the interlayer insulating layer4are located.

Of course, a green filter6and a blue filter are also included.

In summary, the interlayer insulating layer4between the connecting portion11and the bridging portion21and the red color filter5are arranged in a same layer, so that a process step may be saved and production cost may be reduced. Specific forming method is as described in the first implementation mode of Embodiment 1.

For example, a first protruding portion is located above each of the bridging portions21, and the first protruding portion and the green filter are arranged in a same layer and made of a same material; and a second protruding portion71is located on the first protruding portion61, and the second protruding portion71and the blue filter are arranged in a same layer and made of a same material. In this case, a sum of thicknesses of the first protruding portion61and the second protruding portion71and the interlayer insulating layer4may exactly meet a need of a spacing pillar, and therefore, it is not necessary to prepare the spacing pillar separately in the method, so that a process step may be saved and production cost may be reduced. It should be understood that, the interlayer insulating layer and the red filter5are made of a same material, so that the interlayer insulating layer is red; the first protruding portion and the green filter6are made of a same material, so that the first protruding portion61is green; the second protruding portion71and the blue filter are made of a same material, so that the second protruding portion71is blue. Thus, the interlayer insulating layer, the first protruding portion61and the second protruding portion71sequentially located above the connecting portion11are superimposed, which is equivalent to superimpose the red, green and blue filters on here, so that light transmittance at the position is very low, and it is not necessary to arrange the black matrix3below the connecting portion11, thereby saving process steps and reducing production cost, and of course, the black matrix3may be also arranged, which may maximally avoid light leakage.

It should be noted here that, the expression “film layers arranging in (a) same layer” described in the embodiments refers to that the film layers are formed by using the same one mask.

Of course, the interlayer insulating layer4in the embodiment may be also formed with the green filter6or the blue filter synchronously, which will not be repeated here in detail.

As a second structure of the embodiment, as shown inFIG. 6, the color filter substrate includes parts of:

a base substrate10,

a black matrix3arranged above the base substrate10, the black matrix3defining a plurality of pixel regions.

a plurality of first electrode blocks1, a plurality of second electrode blocks2and connecting portions11for connecting two adjacent first electrode blocks1, which are arranged above the layer where the black matrix3is located; wherein, the plurality of first electrode blocks1are arranged in columns, and a sensing electrode is formed by the first electrode blocks1located in a same column and the connecting portions11for connecting the first electrode blocks1located in the same column. And each connecting portion11is located above the black matrix3, so that display may be not affected.

a red filter5and a first sub interlayer insulating layer41(a first layer structure of the interlayer insulating layer4), arranged above a layer where the plurality of first electrode blocks1, the plurality of second electrode blocks2and the connecting portion11for connecting the two adjacent first electrode blocks1are located, the first sub interlayer insulating layer41being located directly above the respective connecting portions11, wherein, the formed first sub interlayer insulating layer41is disconnected from the red filter5adjacent thereto, and the second electrode block2is exposed at a disconnected position; and it should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

a green filter6and a second sub interlayer insulating layer42(a second layer structure of the interlayer insulating layer4), arranged above a layer where the red filter5and the first sub interlayer insulating layer41are located, and the second sub interlayer insulating layer42being respectively located directly above the first sub interlayer insulating layers41, wherein, the formed second sub interlayer insulating layer42is disconnected from the green filter6and the red filter5, and the second electrode block2is exposed at the disconnected position. It should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

bridging portions21, for bridging every two adjacent second electrode blocks2located in a same row, and arranged above the layer where the green filter6and the second sub interlayer insulating layer42are located. So far, preparations of the driving electrode and the sensing electrode are completed.

Of course, a blue filter is also included. The structure of the color filter in the embodiment may be prepared by using the second implementation mode of Embodiment 1.

In summary, the interlayer insulating layer4between the connecting portion11and the bridging portion21has a first portion41arranged in same layer with the red filter5and the second portion42arranged in same layer with the green filter6, so that the interlayer insulating layer4may be formed with the red filter5and the green filter6synchronously by the same patterning processes, and thus a process step may be saved and production cost may be reduced.

For example, a protruding portion8and the blue filter are arranged in a same layer, and at this time, a sum of thicknesses of the protruding portion8and the first sub interlayer insulating layer41and the second sub interlayer insulating layer41may exactly meet a need of a spacing pillar, and therefore, it is not necessary to prepare the spacing pillar separately in the structure, so that process steps may be saved and production cost may be reduced. It should be understood that, the first sub interlayer insulating layer41and the red filter5are made of a same material, so that the first sub interlayer insulating layer41displays red; the second sub interlayer insulating layer42and the green filter6are made of a same material, so that the second sub interlayer insulating layer42displays green; the protruding portion8and the blue filter are made of a same material, so that the protruding portion8displays blue, and thus the first sub interlayer insulating layer41, the second sub interlayer insulating layer42and the protruding portion8sequentially located above the connecting portion11are superimposed, which is equivalent to superimpose the red, green and blue filters on here, so that light transmittance at the position is very low, and it is not necessary to arrange the black matrix3below the connecting portion11, thereby saving process steps, and reducing production cost, and of course, the black matrix3may be also arranged, which may maximally avoid light leakage.

It should be noted that, the interlayer insulating layer4in the embodiment may be also formed with the green filter6and the blue filter synchronously, or formed with the blue filter and the red filter synchronously, a principle thereof is same as that of the structure described above, which will not be described here in detail.

As a third structure of the embodiment, as shown inFIG. 7, the color filter substrate includes parts of:

a base substrate10, a black matrix3arranged above the base substrate10; and the black matrix3defines a plurality of pixel regions.

a plurality of first electrode blocks1, a plurality of second electrode blocks2and a connecting portion11for connecting two adjacent first electrode blocks1, which are arranged above a layer where the black matrix3is located; wherein, the plurality of first electrode blocks1are arranged in columns, and a sensing electrode is formed by the first electrode blocks1located in a same column and the connecting portion11for connecting the first electrode blocks1located in the same column. And each connecting portion11is located above the black matrix3, so that display may be not affected.

a red filter5and a first sub interlayer insulating layer41(a first layer structure of the interlayer insulating layer4), arranged above a layer where the plurality of first electrode blocks1, the plurality of second electrode blocks2and the connecting portions11for connecting the two adjacent first electrode blocks1are located, the first sub interlayer insulating layer41being located above each of the connecting portions11, wherein, the formed first sub interlayer insulating layer41is disconnected from the red filter5adjacent thereto, and the second electrode block2is exposed at a disconnected position. It should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

a green filter6and a second sub interlayer insulating layer42(a second layer structure of the interlayer insulating layer4), arranged above a layer where the red filter5and the first sub interlayer insulating layer41are located, the green filter6being located directly above each of the first sub interlayer insulating layers41, wherein, the formed second sub interlayer insulating layer42is disconnected from the green filter6and the red filter5, and the second electrode block2is exposed at the disconnected position. It should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

a blue filter and a third sub interlayer insulating layer43(a third layer structure of the interlayer insulating layer4), arranged above a layer where the green filter6and the second sub interlayer insulating layer42are located, the blue filter being located directly above each of the second sub interlayer insulating layers42, wherein, the formed third sub interlayer insulating layer43is disconnected from the green filter6, the red filter5and the blue filter, and the second electrode block2is exposed at a disconnected position, and it should be noted here that, the second electrode block2does not need to be completely exposed, so long as it is partly exposed.

bridging portions21, for bridging every two adjacent second electrode blocks2located in a same row, and arranged above the layer where the blue filter and the third sub interlayer insulating layer43are located. The color filter in the embodiment is prepared by using the third implementation mode of Embodiment 1.

In summary, the interlayer insulating layer between the connecting portion11and the bridging portion21has the first portion41arranged in same layer with the red filter5, the second portion42arranged in same layer with the green filter6and the third portion43arranged in same layer with the blue filter, so that the interlayer insulating layer4may be formed with the red filter5, the green filter6and the blue filter synchronously, and thus a process step may be saved and production cost may be reduced.

In the color filter of the embodiment, a sum of thicknesses of the first sub interlayer insulating layer41, the second sub interlayer insulating layer42and the third sub interlayer insulating layer43may exactly meet a need of a spacing pillar, and therefore, it is not necessary to prepare the spacing pillar separately in the method, so that a further process step may be saved and production cost may be reduced. It should be understood that, the first sub interlayer insulating layer41and the red filter5are made of a same material, so that the first sub interlayer insulating layer41is red; the second sub interlayer insulating layer42and the green filter6are made of a same material, so that the second sub interlayer insulating layer42is green; the third sub interlayer insulating layer43and the blue filter are made of a same material, so that the third sub interlayer insulating layer43is blue, and thus the first sub interlayer insulating layer41, the second sub interlayer insulating layer42and the third sub interlayer insulating layer43sequentially located above the connecting portion11are superimposed, which is equivalent to superimpose the red, green and blue filters on here, so that light transmittance at the position is very low, and it is not necessary to arrange the black matrix3below the connecting portion11, thereby saving a further process step and reducing production cost; and of course, the black matrix3may be also arranged, which may better avoid light leakage.

The embodiment provides a display device, including the color filter substrate provided by Embodiment 2.

One example of the display device is a liquid crystal display device, wherein, an array substrate is arranged opposite to a counter substrate to form a liquid crystal cell, and the liquid crystal cell is filled with liquid crystal material therein. A pixel electrode of each pixel unit of the array substrate is used for exerting an electric field to control a rotation degree of the liquid crystal material so as to carry out a display operation. In some examples, the liquid crystal display device further includes a backlight for providing backlight for the array substrate.

Another example of the display device is an organic electroluminescent display device (OLED), wherein, an organic light emitting material stacking layer is formed on an array substrate, and as a positive electrode or a negative electrode, a pixel electrode of each pixel unit is used for driving organic light emitting material to emit light, so as to implement a display operation.

Still another example of the display device is E-paper display device, wherein, an electronic-ink layer is formed on an array substrate, and a pixel electrode of each pixel unit is used for applying voltage to drive charged micro-particles in the electronic-ink to move, so as to implement a display operation.

The display device, for example, can be any product or component having a display function, such as a liquid crystal panel, electronic paper, a mobile phone, a tablet PC, a TV, a display, a notebook computer, a digital photo frame, a navigator, etc.

The display device in the embodiment has low production cost.

Although the present disclosure is described in detail hereinbefore with general illustration and embodiments, based on the present disclosure, certain amendments or improvements can be made thereto, which is obvious for those skilled in the art. Therefore, the amendments or improvements made to the present disclosure without departing from the spirit of the present disclosure should be within the scope of the present disclosure.

The present application claims priority of Chinese Patent Application No. 201610069573.9 filed on Feb. 1, 2016, the disclosure of which is incorporated herein by reference in its entirety as part of the present application.