Color filter substrate, liquid crystal display panel and display device

Abstract

The utility model provides a color filter substrate, a liquid crystal display panel and a display device. The color filter substrate comprises: a substrate plate; the color filter substrate comprises a substrate plate and a black matrix layer formed on the substrate plate, the color filter substrate further comprises a plurality of substrate parts, each substrate part comprises a base, a base platform and a color resistance platform, the base is formed on the substrate plate, the base platform partially covers a part of the black matrix layer, and the color resistance platform covers a part of the black matrix layer. The color resistance table is formed by protruding and extending from the side, away from the base, of the base table, and the top face of the color resistance table is flush with the top face of the base table. And the plurality of spacers are formed on the top surface of the base station.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field especially, relate to a kind of color filter substrate, liquid crystal display panel and display device. BACKGROUND

[0002] In liquid crystal display panel, color filter (CF) substrate and TFT substrate are important part of constituting liquid crystal cell. Therefore, in manufacturing process, as for supporting CF substrate and TFT substrate and accurately controlling the distance between the two substrates (cell gap), photo spacer (PS), its height needs to be accurately designed and manufactured. In addition, in prior art, photo spacer is usually formed on the top surface of substrate, and the area of the top surface of substrate is substantially the same as the area of the bottom of photo spacer.

[0003] When TFT substrate and CF substrate are subjected to external force, photo spacer is prone to relative displacement, so that photo spacer and the supported substrate also have relative displacement. Because the area of the top surface of substrate is small, the photo spacer slides, and part of the photo spacer is separated from the top surface of substrate, which affects the yield of liquid crystal display panel, to solve the problems existing in prior art. SUMMARY

[0004] The utility model is completed in view of the above problem, and its purpose is to provide a kind of color filter substrate that can well guarantee the height of photo spacer, and liquid crystal display panel and display device with the structure.

[0005] An embodiment of the utility model provides a kind of color filter substrate, it includes: base plate;And black matrix layer, it is formed on the base plate, the color filter substrate also includes multiple substrate parts, it includes pedestal, abutment and color resistance platform, the pedestal is formed on the base plate, and the abutment partially covers a portion of the black matrix layer, the color resistance platform is formed by protruding and extending from the side of the abutment away from the pedestal, and the top surface of the color resistance platform is flush with the top surface of the abutment;And multiple photo spacers, it is formed on the top surface of the abutment.

[0006] Preferably, in an embodiment, the multiple substrate parts are formed by different multiple color resistance layers.

[0007] Preferably, in an embodiment, the multiple color resistance layers include first color resistance strip, second color resistance strip and third color resistance strip of different colors respectively, and the multiple substrate parts are formed by the first color resistance strip, the second color resistance strip and the third color resistance strip respectively.

[0008] Preferably, in an embodiment, the plurality of spacers includes a main spacer formed on a top surface of a substrate portion by a stack of two color resist layers of different colors.

[0009] Preferably, in an embodiment, the plurality of color resist layers includes first, second, and third color resist strips of different colors, respectively, and the main spacer is formed on a substrate portion formed by the first color resist strip by the second and third color resist strips.

[0010] Preferably, in an embodiment, the plurality of spacers includes a sub-spacer formed on a substrate portion by a stack of one color resist layer of a different color.

[0011] Preferably, in an embodiment, the plurality of color resist layers includes first, second, and third color resist strips of different colors, respectively, and the sub-spacer is formed on a substrate portion formed by the second color resist strip by the third color resist strip.

[0012] Preferably, in an embodiment, the spacer is located at a non-central position of the base and is disposed toward one side of the color resist base.

[0013] An embodiment of the present application provides a liquid crystal display panel, comprising a TFT substrate, a liquid crystal, and a color filter substrate provided by the above embodiment, wherein the liquid crystal is filled between the TFT substrate and the color filter substrate.

[0014] An embodiment of the present application provides a display device comprising the display panel provided by the above embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0016] Figure 1 is a structural schematic view of a color filter substrate related to the prior art.

[0017] Figure 2 is a structural schematic view of a color filter substrate related to the prior art. Figure 1 is a sectional schematic view of the color filter substrate shown.

[0018] Figure 3 is a structural schematic view of a color filter substrate related to the present application.

[0019] Figure 4 is a cross-sectional view of the color filter substrate. Figure 3 is a cross-sectional view of the color filter substrate. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] In order to make the above and other objects, features, and advantages of the present application more apparent, preferred embodiments of the present application will be described below in detail with reference to the accompanying drawings. In addition, the directional terms mentioned in the present application, such as up, down, top, bottom, front, back, left, right, inner, outer, etc., are only reference directions of the accompanying drawings. Therefore, the directional terms are used to explain and understand the present application, rather than to limit the present application.

[0022] As described above, in a liquid crystal display panel, the color filter substrate and the TFT substrate are important parts of the liquid crystal cell. Therefore, in the manufacturing process, as a spacer for supporting the CF substrate and the TFT substrate and accurately controlling the distance between the two substrates, its height needs to be accurately designed and manufactured.

[0023] In the prior art, in order to simplify the process steps and save production costs, a spacer stacked by RGB pixels (color resistance material) is known. However, since the color resistance material is in a semi-fluid state before the last baking process of each process, it is easy to flow to low-lying places, and the color resistance reserved by the spacer itself is relatively less, resulting in a lower height of the final spacer, thereby affecting the cell gap.

[0024] For example, Figure 1 and Figure 2 A color filter substrate as a prior art is shown, wherein Figure 1 is a structural schematic view of the color filter substrate, Figure 2 is a cross-sectional view of the color filter substrate. As Figure 1 and Figure 2 shown, the color resistance of red (R), green (G), and blue (B) three primary color pixels is arranged in strips in sequence. Among them, the main PS is stacked by BM+RGB. Among them, BM+R is the base, and the G+B spacer determines the height of the main PS.

[0025] However, since the color resistance material is in a semi-fluid state before the last baking process of each process, it is easy to flow to low-lying places such as the black matrix layer. Specifically, in the case ofFigure 2 In the color filter substrate shown, due to the relatively smaller size of the base on the left of the spacer, the color resist on the base is prone to flow to the gap of the black matrix layer, the color resist remaining on the base is relatively less, and the height of the spacer is relatively low. Therefore, the size of the base also affects the stacking effect of the spacer, thereby affecting the final height of the spacer.

[0026] Therefore, it is necessary to provide an improved color filter substrate, and a liquid crystal display panel and a display device having the same, to solve the problems existing in the prior art.

[0027] Hereinafter, the color filter substrate provided by the present application, and the liquid crystal display panel and the display device having the same will be described.

[0028] As shown in Figure 3 and Figure 4 The color filter substrate 100 includes a base plate 10, a black matrix layer (BM) 20 formed on the base plate 10, a plurality of substrate portions 30 formed on the base plate 10 and partially covering the black matrix layer 20, and a spacer 40 formed on the substrate portion 30.

[0029] More specifically, the base plate 100 can be made of transparent material, specifically made of inorganic material such as glass, quartz, etc., or made of organic material such as polymethyl methacrylate (PMMA), etc., which is not limited here.

[0030] A plurality of black matrix layers 20 are formed side by side with a spacing on the base plate 10. In other words, the black matrix layers 20 are arranged in an array on the top surface of the base plate 10 and function as a light shielding layer to prevent light leakage, etc. There is a gap between each black matrix layer 20. In addition, as shown in Figure 4 In this embodiment, the cross-sectional shape of the black matrix layer 20 is trapezoidal, but is not limited thereto and can be other shapes, for example, can also be rectangular.

[0031] The substrate portion 30 is formed on the base plate 10 and is stacked on at least a portion of the black matrix layer 20. In other words, in this embodiment, the substrate portion 30 is formed in the gap and is stacked on at least a portion of the black matrix layer 20 adjacent to the gap. Thus, through the synergistic effect of the black matrix layer 20 and the substrate portion 30, crosstalk of light can be effectively prevented, and leakage of light between pixels is blocked, thereby improving the contrast and color purity of the display.

[0032] It is readily understood that the multiple substrate portions 30 are formed from multiple different color resist layers. Specifically, the multiple substrate portions 30 are formed by a first color resist strip 31, a second color resist strip 32, and a third color resist strip 33 arranged at intervals. It is readily understood that the first color resist strip 31, the second color resist strip 32, and the third color resist strip 33 are all strip-shaped substrate portions extending in the same direction. In this embodiment, the first color resist strip 31, the second color resist strip 32, and the third color resist strip 33 are color resist strips of different colors. In other words, the multiple color resist layers include a first color resist strip 31, a second color resist strip 32, and a third color resist strip 33 of different colors. Specifically, in this embodiment, the first color resist strip 31 is set as a red color resist strip R, the second color resist strip 32 is set as a green color resist strip G, and the third color resist strip 33 is set as a blue color resist strip B. However, this application is not limited to this, and the color and number of color resist strips can be adjusted according to their structural design and process requirements. Hereinafter, without distinguishing between the first color resist strip 31, the second color resist strip 32, and the third color resist strip 33, they will sometimes be collectively referred to as the substrate portion 30.

[0033] Furthermore, in this embodiment, a spacer 40 is formed on the substrate 30.

[0034] Specifically, the spacer 40 includes a main spacer 41 and a secondary spacer 42. In this embodiment, the first spacer 41 is formed by stacking a second color strip 32 and a third color strip 33 on the top surface of the substrate portion 30 of the first color strip 31, and the secondary spacer 42 is formed by stacking a third color strip 33 on the top surface of the substrate portion 30 of the second color strip 32, and so on.

[0035] The plurality of substrate portions 30 include at least a first substrate portion 31 and a second substrate portion 33. The first substrate portion 31 is formed by a first color resist strip 31, and the second substrate portion 33 is formed by a second color resist strip 32.

[0036] like Figure 4 As shown in cross-sectional view, the first substrate 31 includes an integrally formed base 33, a platform 35, and a first color resist platform 31a. The surface of the base 33 is formed as a plane, and the base 33 is located between two adjacent black matrix layers 20. The platform 35 is located at one end of the base 33 and extends and protrudes from the surface of the base 33, thus the base 33 and the platform 35 have a stepped structure. A main spacer 41 is formed on the platform 35.

[0037] In this embodiment, the base 35 protrudes from the left end of the top surface of the base 33. However, it is not limited to this and may also protrude from the right end of the base 33. Preferably, the base 35 is stacked on the top surface and a portion of the sidewalls of the black matrix layer 20 in the vertical direction of the substrate. In this embodiment, the main spacer 41 is located on the left side of the top surface of the base 35.

[0038] The first color blocking platform 31a is block-shaped and extends from the side of the base 35 away from the base 33. The top surface 313a of the first color blocking platform 31a is flush with the top surface of the base 35, and the bottom surface of the first color blocking platform 31a covers the top surface of the corresponding black matrix layer 20.

[0039] Specifically, the first color resist stage 31a extends and protrudes from the side of the base 35 away from the base 33, that is, it protrudes laterally from one side of the base 35. Thus, the top surface 313a of the first color resist stage 31a is continuous and flush with the top surface of the base 35, further ensuring that the main spacer 41 is formed on the top surface of the base 35. Because the first color resist stage 31a protrudes from the base 35, the top surface area of ​​the first color resist stage 31a and the base 35 where the main spacer 41 is formed becomes larger, preventing the main spacer 41 from flowing in a semi-fluid state towards lower terrain during its formation. This significantly improves the stacking effect of the spacers and further prevents a portion of the spacer from detaching from the top surface of the substrate when the spacer slides due to external forces, thereby improving the substrate yield.

[0040] like Figure 3 As shown, when viewed from above, the mask opening pattern of the first color blocking strip 31a is trapezoidal, but it is not limited to this and can also be other shapes, such as semicircular, rectangular, etc. Furthermore, a protrusion 37 is formed at the end of the base 33 opposite to the end where the base 35 is formed. Thus, the first color blocking strip 31 also has a recess 39 formed by the base 33, the base 35, and the protrusion 37. In this embodiment, the first color blocking strip 31a, the base 35, the base 33, and the protrusion 37 are integrally formed, that is, formed from the first color blocking strip 31.

[0041] In addition, such as Figure 4 As shown, the second color stopper 32 has the same cross-sectional shape as the first color stopper 31, therefore a detailed description of the second color stopper 32 is omitted. Furthermore, since the third color stopper 33 does not have a spacer 40 formed on it, its cross-sectional shape is also approximately the same as that of the first color stopper 31, except that no corresponding color stopper platform is formed. Additionally, in this embodiment, the height of the base (not shown) of the third color stopper 33 is slightly higher than that of the first color stopper 31 and the second color stopper 32, but it is not limited to this and can also be the same height. A detailed description of the third color stopper 33 is also omitted here. Furthermore, in this embodiment, an example is shown where the first color stopper 31 and the second color stopper 32 include color stopper platforms, but it is not limited to this, and each color stopper may also include a color stopper platform.

[0042] In addition, in the preparation process of the color filter substrate 100, the first color resist strip 31, the second color resist strip 32 and the third color resist strip 33 are formed in sequence by vacuum drying, edge color resist removal, pre-baking and cooling, exposure and development, and re-baking processes. In addition, the main spacer 41 is formed on the first color resist strip 31, and the auxiliary spacer 42 is formed on the second color resist strip 32. In the process of forming the first color resist strip 31, the first spacer 411 is formed on the first color resist strip 31 at the same time when the second color resist strip 32 is prepared; in the process of forming the second color resist strip 32, the second spacer 413 is formed on the first spacer 411 at the same time when the third color resist strip 31 is prepared (see FIG. 4B). Figure 4

[0043] In addition, in the process of preparing the first color resist strip 31 and the second color resist strip 32, in the edge color resist removal process, recess cutting is performed at positions corresponding to the positions where the main spacer 41 and the auxiliary spacer 42 are to be formed later, so that the first color resist strip 31 and the second color resist strip 32 respectively include the first color resist platform 31a and the second color resist platform 32a which protrude from the base side to the side.

[0044] Therefore, by forming the spacer at the position corresponding to the color resist platform, the area around the spacer is increased, so that the semi-fluid state of the spacer is difficult to flow to the black matrix layer 20 which is in a low position before the last re-baking process in the preparation process of the spacer, thereby improving the height of the prepared spacer, and avoiding the situation that part of the spacer is separated from the top surface of the substrate.

[0045] Table 1 shows the values of various parameters of the color filter substrates prepared by the same process with and without the formation of the color resist platform, respectively.

[0046] Table 1

[0047]

[0048] ​According to the table 1, in the two color filter substrates, the height of the spacer is higher when the color resistance platform is formed, that is, the stacking effect of the spacer can be improved significantly. Thus, the amount of liquid crystal in the liquid crystal box can be increased, and the cost of the color resistance can be reduced while the cell gap is kept unchanged. In contrast, in order to keep the height of the spacer unchanged, the film thickness of the black matrix layer needs to be increased when the color resistance platform is not formed, thus resulting in an increase in the consumption of the color resistance. In addition, when the color resistance platform is formed, the critical dimension of the top of the spacer is larger, thus the pressure can be dispersed more evenly when the substrate is supported by the spacer, and the surface pressure strength can be increased.

[0049] In addition, it is easy to understand that the thickness and type of each layer can be adjusted flexibly according to actual needs, so that the height of the main spacer and the auxiliary spacer of the completed color filter substrate meets the design requirements.

[0050] In addition, the liquid crystal display panel provided by the utility model includes a TFT substrate, liquid crystal and the color filter substrate as described above, wherein the liquid crystal is filled between the TFT substrate and the color filter substrate.

[0051] Further, the display device provided by the utility model includes the liquid crystal display panel as described above. The display device can be a liquid crystal panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator or any product or component with a display function.

[0052] In addition, in the present disclosure, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" 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 not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0053] All aspects of the embodiments disclosed herein are exemplary and are not limited in this way. Therefore, the technical scope of the utility model is not only explained by the above-mentioned embodiments, but is defined based on the description of the claims. In addition, all modifications within the meaning and scope equivalent to the claims are included.

Claims

1. A color filter substrate, comprising: Base plate; and a black matrix layer, which is formed on the substrate, The color filter substrate is characterized in that... The color filter substrate further includes multiple substrate portions, which include a base, a stage, and a color resist stage. The base is formed on the substrate, and the platform partially covers a portion of the black matrix layer. The color blocking stage extends from the side of the base away from the base, and the top surface of the color blocking stage is flush with the top surface of the base. as well as Multiple spacers are formed on the top surface of the base.

2. The color filter substrate according to claim 1, characterized in that, The plurality of substrates are formed by different color resist layers.

3. The color filter substrate according to claim 2, characterized in that, The plurality of color resist layers include a first color resist strip, a second color resist strip, and a third color resist strip, each of which is a different color. The plurality of substrate portions are formed by the first color resist strip, the second color resist strip, and the third color resist strip, respectively.

4. The color filter substrate according to claim 1, characterized in that, The plurality of spacers includes a main spacer, which is formed on the top surface of the substrate by stacking two color resist layers of different colors.

5. The color filter substrate according to claim 4, characterized in that, The plurality of color resist layers include a first color resist strip, a second color resist strip, and a third color resist strip, each with distinct characteristics. The main spacer is formed on a substrate portion formed by the first color resist strip, and then formed by the second color resist strip and the third color resist strip.

6. The color filter substrate according to claim 1, characterized in that, The plurality of spacers includes subspacers, which are formed on the substrate by stacking a color resist layer of a different color.

7. The color filter substrate according to claim 6, characterized in that, The plurality of color resist layers include a first color resist strip, a second color resist strip, and a third color resist strip, each with distinct characteristics. The sub-spacer is formed on a substrate portion formed by the second color barrier strip, through the third color barrier strip.

8. The color filter substrate according to claim 1, characterized in that, The spacer is located in a non-central position on the base and is positioned on one side of the color blocking stage.

9. A liquid crystal display panel, characterized in that, include TFT substrate, liquid crystal, and color filter substrate as described in any one of claims 1-8, The liquid crystal is filled between the TFT substrate and the color filter substrate.

10. A display device, characterized in that, Includes the liquid crystal display panel as described in claim 9.

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