WO2019001111A1 - 彩膜基板及制备方法、显示面板 - Google Patents

彩膜基板及制备方法、显示面板 Download PDF

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Publication number
WO2019001111A1
WO2019001111A1 PCT/CN2018/083868 CN2018083868W WO2019001111A1 WO 2019001111 A1 WO2019001111 A1 WO 2019001111A1 CN 2018083868 W CN2018083868 W CN 2018083868W WO 2019001111 A1 WO2019001111 A1 WO 2019001111A1
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Prior art keywords
color
resisting
unit
color resisting
green
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PCT/CN2018/083868
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English (en)
French (fr)
Inventor
朴正淏
刘芳转
胡竞勇
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京东方科技集团股份有限公司
重庆京东方光电科技有限公司
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Priority to US16/321,610 priority Critical patent/US20210286212A1/en
Publication of WO2019001111A1 publication Critical patent/WO2019001111A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a color filter substrate, a preparation method, and a display panel.
  • a liquid crystal display is a flat, ultra-thin display device composed of a certain number of color or black and white pixels. LCD monitors are very low in power consumption and are therefore favored by users. Most of the general liquid crystal displays use three primary colors, namely red, green and blue. With the constant pursuit of display quality by consumers, red, green, blue and white (RGBW) display technology has also emerged. This technology adds white sub-pixels. The advantage is that the brightness of the picture is higher, so there is no need to increase the number of backlights. Increase the brightness of the screen. Thus, while the three sub-pixels of red, green and blue form a luminance channel, the white sub-pixel also forms a luminance channel, which greatly enhances the brightness of the display.
  • RGBW red, green, blue and white
  • the present disclosure proposes a color film substrate.
  • the color filter substrate includes: a substrate substrate; a plurality of color resisting units arranged in an array on the base substrate, the plurality of color resisting units including a red color resisting unit, a green color resisting unit, a blue color resisting unit, and a yellow color resisting unit; wherein the plurality of color resisting units are equal in height.
  • the yellow color resistive unit is composed of a red color resisting section and a green color resisting section laminated in a direction perpendicular to the base substrate.
  • the ratio of the height of the red color resisting segment and the green color resisting segment is in the range of 0.5 to 0.75.
  • the yellow color resistive unit is composed of a red color resisting segment and a green color resisting segment disposed in the same layer and adjacent to each other.
  • the ratio of the area of the red color resisting segment and the green color resisting segment is in the range of 0.6 to 0.75.
  • a liquid crystal display panel in another aspect of the present disclosure, includes the color film substrate described in the above embodiments, the opposite substrate disposed opposite to the color film substrate, and a liquid crystal layer disposed between the color film substrate and the opposite substrate; The thickness of the liquid crystal layer at the position corresponding to the plurality of color resisting units is equal.
  • a method of preparing a color filter substrate includes: providing a substrate; and arraying a plurality of color resisting units on the substrate, the color resisting unit comprising a red color resisting unit, a green color resisting unit, a blue color resisting unit, and a yellow color a resistance unit; wherein the plurality of color resist units are equal in height.
  • the yellow color resistive unit is composed of a red color resisting segment and a green color resisting segment stacked in a direction perpendicular to the base substrate; wherein the red color resisting segment and the red color The resistive unit is formed by the same patterning process, and the green color resisting section and the green color resisting unit are formed by the same patterning process.
  • arranging the plurality of color resisting units on the substrate substrate includes: disposing a red color resist layer for forming the red color resisting unit and the red color resisting layer; a process of forming the red color resisting unit and the red color resisting layer based on the red color resist layer; and providing a green color resist layer for forming the green color resisting unit and the green color resisting layer; a patterning process of forming the green color resistive unit and the green color resisting segment based on the green color resist layer.
  • the ratio of the height of the red color resisting segment and the green color resisting segment is in the range of 0.5 to 0.75.
  • the yellow color resistive unit is composed of a red color resisting segment and a green color resisting segment disposed in the same layer and adjacent to each other; wherein the red color resisting segment and the red color resisting unit are the same Formed by the sub-patterning process, the green color resisting segment and the green color resisting unit are formed by the same patterning process.
  • arranging the plurality of color resisting units on the substrate substrate includes: disposing a red color resist layer for forming the red color resisting unit and the red color resisting layer; a process of forming the red color resisting unit and the red color resisting layer based on the red color resist layer; and providing a green color resist layer for forming the green color resisting unit and the green color resisting layer; a patterning process of forming the green color resistive unit and the green color resisting segment based on the green color resist layer.
  • the ratio of the area of the red color resisting segment and the green color resisting segment is in the range of 0.6 to 0.75.
  • FIG. 1 shows a schematic cross-sectional view of a color filter substrate in accordance with one embodiment of the present disclosure
  • FIG. 2 shows a schematic cross-sectional view of a color filter substrate in accordance with another embodiment of the present disclosure
  • FIG. 3 is a top plan view showing a color filter substrate according to another embodiment of the present disclosure.
  • FIG. 4 is a schematic cross-sectional view showing a related art display panel
  • FIG. 5 shows a schematic cross-sectional view of a display panel according to an embodiment of the present disclosure
  • FIG. 6 shows a flow chart of a method of preparing a color filter substrate in accordance with one embodiment of the present disclosure.
  • liquid crystal displays based on red, green, blue and white (RGBW) display technology generally have a problem of uneven brightness of display screens.
  • the inventors have found that this is mainly due to the difference in the red, green, blue and white resistance between the red, green, blue and white resistance technologies used in current liquid crystal displays.
  • it is mainly to produce a white resistance by using a disposable full-coating planarization film (OC film).
  • OC film planarization film
  • the white sub-pixels are generally in a recessed state with respect to the red, green and blue sub-pixels, so that after the liquid crystal panel is placed on the box, the box thickness corresponding to the white sub-pixels is larger than the box thickness corresponding to the red, green and blue sub-pixels.
  • the amount of liquid crystal corresponding to the white sub-pixel is correspondingly large, and the height of the spacer (PS) fluctuates greatly, and finally the brightness and transmittance of the white sub-pixel are higher than those of the adjacent red, green and blue sub-pixels.
  • the display has the disadvantage of uneven brightness.
  • the present disclosure is intended to alleviate or solve at least some of the above mentioned problems at least to some extent.
  • the color filter substrate includes: a substrate substrate 100; a plurality of color resist units arranged in an array on the base substrate 100, the plurality of color resist units including a red color Resisting unit 10, green color resisting unit 20, blue color resisting unit 30 and yellow color resisting unit 40;
  • the heights of the plurality of color resist units are equal. Thereby, the display transmittance of the liquid crystal display prepared by the color filter substrate is improved, and the uniformity of the brightness of the display screen is also ensured.
  • the related art uses a planarizing film to form a white color resisting unit, and the planarizing film has a disadvantage that the fluidity is largely uncontrolled, thereby causing a certain step difference between the white color resist and the red, green, and blue color resists. .
  • the white sub-pixels are in a recessed state with respect to the red, green and blue sub-pixels, so that the box thickness at the white sub-pixels and the box thickness at the red, green and blue sub-pixels after the setting of the box are not equal, resulting in display brightness. Not uniform.
  • the display panel based on the RGBW display technology is currently composed of a color film substrate and an array substrate.
  • the array substrate includes an array substrate substrate 200, a thin film transistor 300, and a pixel electrode 400.
  • the color film substrate and the array substrate are formed by forming a display panel.
  • the RGBW display technology is employed in the related art, and the color filter substrate includes a red color resist unit 10, a green color resist unit 20, a blue color resist unit 30, and a white color resist unit 50.
  • the white color resisting unit 50 is formed of a planarizing film, which is too fluid, and the process is not well controlled. This causes a depression at the white color resisting unit 50, which is lower than the height of the red, green and blue resistance unit.
  • the box thickness D3 at the white color resisting unit 50 and the box thickness at the red, green, and blue resisting units are not equal. , eventually resulting in uneven display brightness.
  • the red, green, and blue sub-pixels by optimizing the red, green, and blue sub-pixels, adjusting the ratio of the red color resistance and the green color resistance to obtain a mixed color resistance of the two, that is, a yellow color resistance (Y) instead of the white color resistance, thereby A display panel with higher brightness, wider color gamut, and more sub-pixel points.
  • a yellow color resistance Y
  • the inventors have found that the process controllability of the yellow color resist obtained by mixing the red color resist and the green color resist is superior to that of the flat film material having a large fluidity.
  • the yellow sub-pixel does not appear concave, its height is consistent with the height of the red, green and blue sub-pixels, and the thickness of the box at the yellow sub-pixel is equal to the thickness of the box at the red, green and blue sub-pixels after the setting of the box, thereby improving The brightness of the display is ensured and the brightness uniformity is ensured.
  • the color resisting unit of the color filter substrate includes a red color resist unit 10, a green color resist unit 20, a blue color resist unit 30, and a yellow color resist unit 40.
  • a red color resist unit 10 for the RGB three primary color display technology, the three primary colors of RGB are rich in purple, rose, etc., but are slightly insufficient for other colors.
  • the RGBY display technology of the embodiment of the present disclosure the colors of the blue, green, and yellow colors are more abundant, and the yellow color as the transition color enhances the color gamut of the entire display screen, so that the display color is more delicate and rich.
  • the yellow color resist unit 40 may be composed of a red color resisting section 41 and a green color resisting section 42 stacked in a direction perpendicular to the base substrate 100.
  • the inventors have found that when a certain intensity of light is blocked by red, green and blue, the luminance ratio of red, green and blue light is about 3:9:1, so by using a mixture of red color resistance and green color resistance, Get a relatively high brightness. That is to say, the color film substrate (RGBY display) according to the embodiment of the present disclosure increases the percentage of red and green color resistance with respect to the RGB-based primary color display, thereby being able to improve the brightness unevenness of the display screen while being capable of Increase display brightness.
  • the height of the yellow color resisting unit 40 that is, the height of the red color resisting section 41 and the height of the green color resisting section 42, and the red color resisting unit 10, the green color resisting unit 20, and the blue color resisting unit
  • the height of unit 30 is uniform.
  • the white color resisting unit 40 is replaced by the yellow color resisting unit 40, thereby avoiding the unevenness of the box thickness caused by the step difference between the red, green and blue resistances and the white color resisting, and ensuring the height of the spacers and the liquid crystal amount for the color resists of different colors. Effective control, thus increasing the brightness of the display.
  • the yellow color resisting unit 40 is formed by using the red color resisting section 41 and the green color resisting section 42 to not only control the height of the yellow color resisting unit 40, so that the liquid crystal display panel having the color film substrate can be obtained.
  • the uniform thickness of the box is advantageous for simplifying the preparation process of the color filter substrate, and it is not necessary to introduce materials other than the three color resist layers of red, green and blue.
  • the inventors have found that adjusting the height ratio of the red color resisting section 41 to the green color resisting section 42 can adjust the brightness of the yellow color resisting unit 40.
  • the ratio of the heights of the red color resisting segments 41 and the green color resisting segments 42 may be in the range of 0.5 to 0.75. Thereby, the brightness of the display screen can be further improved.
  • the height ratio of the red color resisting segment 41 to the green color resisting segment 42 may be 2:3.
  • the yellow color resist unit 40 may also be composed of a red color resisting segment 41 and a green color resisting segment 42 which are disposed in the same layer and adjacently.
  • the heights of the red color resisting segments 41 and the green color resisting segments 42 are equal, and the heights of the two color resisting segments are equal to the heights of the red color resisting unit 10, the green color resisting unit 20, and the blue color resisting unit 30, thereby ensuring
  • the box thickness at the last sub-pixel is set to be the same for the box.
  • the ratio of the area of the red color resisting section 41 to the area of the green color resisting section 42 may be in the range of 0.6 to 0.75, thereby further increasing the brightness of the display screen.
  • the area ratio of the red color resisting segment 41 to the green color resisting segment 42 may be 2:3.
  • the color filter substrate includes a red color resist unit 10, a green color resist unit 20, a blue color resist unit 30, and a yellow color resist unit 40
  • the yellow color resist unit 40 is composed of a red color resisting portion 41. It is formed with the green color resisting segment 42 such that the height of the yellow color resisting unit 40 is equal to the height of the red, green and blue resistive units.
  • the specific heights of the red color resist unit 10, the green color resist unit 20, and the blue color resist unit 30 can be designed according to the requirements of the array substrate of the color filter substrate. . That is to say, when the array substrate faces the surface of the color filter substrate side (for example, a non-flat surface), the heights of the red color resist unit 10, the green color resist unit 20, and the blue color resist unit 30 may not be all. Equally, as long as the thickness of the liquid crystal layer at the position corresponding to the plurality of color resisting units can be ensured to be equal.
  • the liquid crystal display panel includes the color filter substrate described in the above embodiments, the opposite substrate disposed opposite to the color filter substrate, and the color film substrate and the opposite substrate a liquid crystal layer; wherein a thickness of the liquid crystal layer at a position corresponding to the plurality of color resisting units is equal. Therefore, the display panel has all the features and advantages of the color film substrate described above, and details are not described herein again. With the above arrangement, the display transmittance of the display panel is improved, and the uniformity of the brightness of the display screen is also ensured.
  • the liquid crystal display panel includes the color film substrate described in the above embodiments, the opposite substrate disposed opposite to the color film substrate, and the color film substrate and the The liquid crystal layer 500 between the opposite substrates; wherein the liquid crystal layer thicknesses D1, D2 at positions corresponding to the plurality of color resisting units are equal.
  • the color filter substrate prepared by the method may be the color film substrate described above.
  • the color filter substrate prepared by the method can have the same features and advantages as the color film substrate described above, and will not be described herein.
  • the method includes: providing a base substrate; and arraying a plurality of color resist units on the base substrate, the color resist unit including a red color resist unit, a green color resist unit, and blue a color resistive unit and a yellow color resisting unit; wherein the plurality of color resisting units are equal in height.
  • the yellow color resistive unit is composed of a red color resisting segment and a green color resisting segment stacked in a direction perpendicular to the base substrate; wherein the red color resisting segment and the red color The resistive unit is formed by the same patterning process, and the green color resisting section and the green color resisting unit are formed by the same patterning process.
  • a yellow color resist unit composed of a red color resisting section and a green color resisting section stacked in a direction perpendicular to the base substrate can be obtained by a simple production process.
  • the height ratio of the red color resisting segment to the green color resisting segment may be 2:3, whereby the brightness of the display screen can be further improved.
  • arranging the plurality of color resisting units on the substrate substrate includes: disposing a red color resist layer for forming the red color resisting unit and the red color resisting layer; a process of forming the red color resisting unit and the red color resisting layer based on the red color resist layer; and providing a green color resist layer for forming the green color resisting unit and the green color resisting layer; a patterning process of forming the green color resistive unit and the green color resisting segment based on the green color resist layer.
  • the “patterning process” in the above description may include processes such as photolithography, inkjet printing, and printing process, and those skilled in the art may design according to actual conditions.
  • the ratio of the height of the red color resisting segment and the green color resisting segment is in the range of 0.5 to 0.75.
  • the yellow color resistive unit is composed of a red color resisting segment and a green color resisting segment disposed in the same layer and adjacent to each other; wherein the red color resisting segment and the red color resisting unit are the same Formed by the sub-patterning process, the green color resisting segment and the green color resisting unit are formed by the same patterning process.
  • a yellow color resisting unit composed of a red color resisting section and a green color resisting section which are disposed in the same layer and adjacently can be obtained by a simple production process.
  • the ratio of the area of the red color resisting segment to the green color resisting segment may be 2:3, whereby the brightness of the display screen can be further improved.
  • arranging the plurality of color resisting units on the substrate substrate includes: disposing a red color resist layer for forming the red color resisting unit and the red color resisting layer; a process of forming the red color resisting unit and the red color resisting layer based on the red color resist layer; and providing a green color resist layer for forming the green color resisting unit and the green color resisting layer; a patterning process of forming the green color resistive unit and the green color resisting segment based on the green color resist layer.
  • the “patterning process” in the above description may include processes such as photolithography, inkjet printing, and printing process, and those skilled in the art may design according to actual conditions.
  • the ratio of the area of the red color resisting segment and the green color resisting segment is in the range of 0.6 to 0.75.
  • a red color resist layer may be disposed on a substrate, and then a red color resistive unit and a red color resistive segment are formed by a first patterning process. And, in the first patterning process, the thickness of the red color resisting segment is smaller than the thickness of the red color resisting unit. Subsequently, a green color resist layer may be disposed on the substrate, and then a green color resisting unit and a green color resisting portion are formed by the second patterning process. Also, in the second patterning process, the thickness of the green color resistive segment is less than the thickness of the green color resistive unit.
  • a yellow color resist unit which is formed by laminating a red color resisting section and a green color resisting section can be formed. It can be understood by those skilled in the art that since the yellow color resistive unit is composed of the stacked red color resisting segments and the green color resisting segments, the thickness of the red color resisting segments in the first patterning process and the second patterning process and The sum of the thicknesses of the green color resisting segments should be equal to the thickness of the red color resisting unit and the green color resisting unit, so as to ensure that the thicknesses of the plurality of color resisting units of the color filter substrate are equal.
  • first patterning process and the “second patterning process” are only for distinguishing two patterning processes, and are not to be construed as limiting their importance or order. That is to say, in the present disclosure, the first patterning process may be performed first, or the second patterning process may be performed first. The first patterning process and the second patterning process may use the same process or different patterning processes. In the first patterning process and the second patterning process, the specific manner of controlling the thickness is also not particularly limited, and those skilled in the art can select according to the specifically selected patterning process.
  • the red color resist layer may be composed of a red color resist glue, and the red color resist glue is exposed and developed to form a red color resistive unit and a red color resisting segment.
  • the first patterning process may also be inkjet printing. At this time, the control of the thickness of the red color resistive unit and the red color resisting section can be achieved by controlling the amount of inkjet printed inkjet material.
  • the second patterning process may also have similar features to the first patterning process described above, and will not be described herein.
  • the yellow color resisting unit and the yellow color resisting unit disposed adjacent to the green color resisting segment may also be formed by the first patterning process and the second patterning process. It can be understood by those skilled in the art that when the yellow color resisting unit is composed of the adjacent red color resisting segment and the green color resisting segment: in the first patterning process, the area of the red color resisting segment is smaller than that of the red color resisting unit. Area; in the second patterning process, the area of the green color resisting section is smaller than the area of the green color resisting unit. At this time, the thickness of the red color resisting segment, the green color resisting segment, the red color resisting unit, and the green color resisting unit are equal.
  • the first patterning process and the second patterning process at this time may also be photolithography or inkjet printing, and the like.
  • the shape of the exposure mask can be controlled such that the area of the red color resisting segment obtained after development is smaller than the area of the red color resisting unit; when the first composition is When the process is inkjet printing, the area of the red color resisting segment obtained after development can be made smaller than the area of the red color resisting unit by introducing a template or controlling the amount of inkjet printing material.
  • the specific steps of the method for forming a red color resist unit, a green color resist unit, a blue color resist unit, and a yellow color resist unit by using a photolithography process may be as follows:
  • a red color resist paste is coated on the substrate for subsequent processing by exposure, development, or the like to form a red color resistive unit and a red color resisting segment.
  • the red color resist is subjected to a first patterning process to obtain a red color resist unit and a red color resist.
  • the first patterning process may include exposing the color resist layer formed of the red color resist glue to the exposure mask. Subsequently, the exposed red color resist is developed to form a red color resist unit and a red color resist, and the remaining red resist is removed.
  • the thickness of the red color resisting unit may be greater than the thickness of the red color resisting section.
  • the light leakage region of the exposure mask formed at the red color resisting unit may be consistent with the shape of the light leakage region at the red color resisting portion, so that the exposure amount at the red color resisting unit is different from that at the red color resisting portion.
  • the exposure amount at the red color resisting segment may be 40% of the exposure amount at the red color resisting unit, so that a red color resisting unit and a red color resisting segment having different areas of the same height may be obtained.
  • the area of the light leakage region of the exposure mask formed at the red color resisting unit can be different from the formation.
  • the area of the corresponding light leakage area at the red color resisting section may be 40% of the area of the light leakage area at the red color resisting unit.
  • a green color resist paste is coated on the substrate for subsequent processing by exposure, development, or the like to form a green color resistive unit and a green color resisting segment.
  • the green color resist paste is subjected to a second patterning process to obtain a green color resistive unit and a green color resisting segment.
  • the second patterning process may include exposing the color resist layer formed of the green photoresist based on the exposure mask. Subsequently, the exposed green resistant is subjected to development processing to form a green color resist unit and a green color resist, and the remaining green resist is removed.
  • the thickness of the green color resisting unit may be greater than the thickness of the green color resisting section.
  • the light leakage region of the exposure mask formed at the green color resisting unit may be consistent with the shape of the light leakage region at the green color resisting portion, so that the exposure amount at the green color resisting unit is different from that at the green color resisting portion.
  • the exposure amount at the green color resisting segment may be 60% of the exposure amount at the green color resisting unit, so that a green color resisting unit and a green color resisting segment having different areas of the same height can be obtained.
  • the area of the light leakage region of the exposure mask formed at the green color resisting unit is different from the light leakage at the green color resisting portion.
  • the area of the district. Specifically, the area of the corresponding light leakage area at the green color resisting section may be 60% of the area of the light leakage area at the green color resisting unit.
  • red color resistive unit and the red color resisting segment and the green color resisting unit and the green color resisting segment is not particularly limited, and those skilled in the art can design according to specific conditions.
  • the red color resisting unit and the red color resisting segment may be prepared first, or the green color resisting unit and the green color resisting segment may be prepared first.
  • the blue color resist unit can be prepared by first coating a color resist substrate with a blue color resist glue, and then performing blue color resist adhesive on the exposure mask based on the exposure mask. Exposure and development treatment to obtain a blue color resisting unit. It should be noted that the order of preparation of the blue color resisting unit is not particularly limited, and those skilled in the art can design according to actual conditions.
  • a blue color resisting unit may be prepared before the red color resisting unit, the red color resisting section, the green color resisting unit, and the green color resisting section are prepared, or may be in a red color resisting unit, a red color resisting section, a green color resisting unit, After the preparation of the green color resisting segment is completed, a blue color resisting unit is prepared.
  • the RGBY display technology avoids the fluctuation of the difference between the sub-pixels in the RGBW display technology, which is favorable for the uniformity of the display box thickness; improves the resolution and brightness of the display screen;
  • the yellow color display of the display screen is used;
  • the yellow color resisting unit is prepared by using the red color resisting unit and the mask of the green color resisting unit, thereby reducing the use of the mask and reducing the cost.
  • the description of the terms “one embodiment”, “another embodiment” or the like means that the specific features, structures, materials or characteristics described in connection with the embodiments are included in at least one embodiment of the present disclosure. .
  • the schematic representation of the above terms is not necessarily directed to the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Further, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without departing from the scope of the invention.

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Abstract

一种彩膜基板及制备方法、显示面板。彩膜基板包括：衬底基板；在衬底基板上阵列排布的多个色阻单元，多个色阻单元包括红色色阻单元（10）、绿色色阻单元（20）、蓝色色阻单元（30）和黄色色阻单元（40）；其中，多个色阻单元的高度相等。由此，提高了由彩膜基板制备的液晶显示器的显示屏透过率，同时也保证了显示屏亮度的均匀性。

Description

彩膜基板及制备方法、显示面板
相关申请
本申请要求保护在2017年6月29日提交的申请号为201710515926.8的中国专利申请的优先权，该申请的全部内容以引用的方式结合到本文中。
技术领域
本公开涉及显示技术领域，具体地，涉及彩膜基板及制备方法、显示面板。
背景技术
液晶显示器，为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成。液晶显示器功耗很低，因此受到用户的青睐。一般的液晶显示器大多采用三原色技术，即红色、绿色、蓝色三种色彩。伴随着消费者对显示品质不断追求，红绿蓝白(RGBW)显示技术也随之兴起，该技术加入了白色的子像素，其优势在于画面的亮度更高，从而不需要增加背光源数量的前提下提升画面亮度。由此，红绿蓝三个子像素形成一个亮度通道的同时，白子像素也形成一个亮度通道，大大提升了显示屏的亮度。
然而，目前彩膜基板及制备方法、显示面板仍有待改进。
公开内容
有鉴于此，在本公开的一个方面，本公开提出了一种彩膜基板。该彩膜基板包括：衬底基板；在所述衬底基板上阵列排布的多个色阻单元，所述多个色阻单元包括红色色阻单元、绿色色阻单元、蓝色色阻单元和黄色色阻单元；其中，所述多个色阻单元的高度相等。由此，提高了由该彩膜基板制备的液晶显示器的显示屏透过率，同时也保证了显示屏亮度的均匀性。
在一些实施例中，所述黄色色阻单元由在垂直于所述衬底基板的方向上层叠的红色色阻段以及绿色色阻段构成。
在一些实施例中，所述红色色阻段以及所述绿色色阻段的高度之 比在0.5到0.75的范围内。
在一些实施例中，所述黄色色阻单元由同层且相邻地设置的红色色阻段以及绿色色阻段构成。
在一些实施例中，所述红色色阻段以及所述绿色色阻段的面积之比在0.6到0.75的范围内。
在本公开的另一个方面，还提供了一种液晶显示面板。所述液晶显示面板包括以上实施例所述的彩膜基板、与所述彩膜基板相对设置的对置基板、以及布置在所述彩膜基板和所述对置基板之间的液晶层；其中，与所述多个色阻单元对应的位置处的液晶层厚度是相等的。
在本公开的另一个方面，还提供了一种制备彩膜基板的方法。所述方法包括：提供衬底基板；以及在所述衬底基板上阵列排布多个色阻单元，所述色阻单元包括红色色阻单元、绿色色阻单元、蓝色色阻单元和黄色色阻单元；其中，所述多个色阻单元的高度相等。
在一些实施例中，所述黄色色阻单元由在垂直于所述衬底基板的方向上层叠的红色色阻段以及绿色色阻段构成；其中，所述红色色阻段以及所述红色色阻单元是通过同一次构图工艺形成的，所述绿色色阻段以及所述绿色色阻单元是通过同一次构图工艺形成的。
在一些实施例中，在所述衬底基板上阵列排布多个色阻单元包括：设置用于形成所述红色色阻单元以及所述红色色阻段的红色色阻层；通过第一构图工艺，基于所述红色色阻层形成所述红色色阻单元以及所述红色色阻段；设置用于形成所述绿色色阻单元以及所述绿色色阻段的绿色色阻层；通过第二构图工艺，基于所述绿色色阻层形成所述绿色色阻单元以及所述绿色色阻段。
在一些实施例中，所述红色色阻段以及所述绿色色阻段的高度之比在0.5到0.75的范围内。
在一些实施例中，所述黄色色阻单元由同层且相邻地设置的红色色阻段以及绿色色阻段构成；其中，所述红色色阻段以及所述红色色阻单元是通过同一次构图工艺形成的，所述绿色色阻段以及所述绿色色阻单元是通过同一次构图工艺形成的。
在一些实施例中，在所述衬底基板上阵列排布多个色阻单元包括：设置用于形成所述红色色阻单元以及所述红色色阻段的红色色阻层；通过第一构图工艺，基于所述红色色阻层形成所述红色色阻单元以及 所述红色色阻段；设置用于形成所述绿色色阻单元以及所述绿色色阻段的绿色色阻层；通过第二构图工艺，基于所述绿色色阻层形成所述绿色色阻单元以及所述绿色色阻段。
在一些实施例中，所述红色色阻段以及所述绿色色阻段的面积之比在0.6到0.75的范围内。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1显示了根据本公开一个实施例的彩膜基板的截面示意图；
图2显示了根据本公开另一个实施例的彩膜基板的截面示意图；
图3显示了根据本公开另一个实施例的彩膜基板的俯视示意图；
图4显示了相关技术的显示面板的截面示意图；
图5显示了根据本公开一个实施例的显示面板的截面示意图；以及
图6显示了根据本公开一个实施例的制备彩膜基板的方法的流程图。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能理解为对本公开的限制。
在本公开的描述中，术语“上”、“下”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开而不是要求本公开必须以特定的方位构造和操作，因此不能理解为对本公开的限制。
本公开是基于发明人的以下发现而作出的。
目前，基于红绿蓝白(RGBW)显示技术的液晶显示器普遍存在显示屏亮度不均匀的问题。发明人发现，这主要是由于目前的液晶显示器所采用的红绿蓝白显示技术中，红、绿、蓝和白色阻之间存在段差造成的。在液晶面板制备过程中，为了减少掩膜板的费用，目前主 要是采用一次性的全涂覆平坦化膜(OC膜)制作白色阻。OC膜的流动性太大，工艺不好控制。因此在制作过程中，白色子像素通常相对于红绿蓝子像素处于凹陷状态，从而在液晶面板对盒设置后，白色子像素对应的盒厚较红绿蓝子像素对应的盒厚大。此外，白色子像素对应处的液晶量相应较多，隔垫物(PS)高度波动大，最终导致白色子像素的亮度、透过率均高于相邻红绿蓝子像素处的亮度。显示屏出现了亮度不均匀的弊端。
本公开旨在至少一定程度上缓解或解决上述提及问题中至少一个。
在本公开的一个方面，提出了一种彩膜基板。根据本公开的实施例，参考图1，该彩膜基板包括：衬底基板100；在所述衬底基板100上阵列排布的多个色阻单元，所述多个色阻单元包括红色色阻单元10、绿色色阻单元20、蓝色色阻单元30和黄色色阻单元40；
其中，所述多个色阻单元的高度相等。由此，提高了由该彩膜基板制备的液晶显示器的显示屏透过率，同时也保证了显示屏亮度的均匀性。
为了方便理解，下面首先对该彩膜基板提高显示屏亮度并能保证亮度均一性的原理进行简单说明。
如前所述，相关技术采用平坦化膜制作白色色阻单元，而平坦化膜存在流动性大不受控制的缺点，从而造成白色色阻与红色、绿色、蓝色色阻之间存在一定的段差。制作过程中，白色子像素相对于红绿蓝子像素来说处于凹陷状态，从而造成对盒设置之后白色子像素处的盒厚与红绿蓝子像素处的盒厚不相等，导致显示屏亮度不均匀。具体的，参考图4，目前基于RGBW显示技术的显示面板由彩膜基板以及阵列基板构成。阵列基板包括阵列基板衬底200、薄膜晶体管300以及像素电极400。彩膜基板与阵列基板通过对盒设置形成显示面板。在相关技术中采用RGBW显示技术，彩膜基板包括红色色阻单元10、绿色色阻单元20、蓝色色阻单元30以及白色色阻单元50。如上所述，白色色阻单元50由平坦化膜形成，其流动性太大，工艺不好控制。由此导致白色色阻单元50处出现凹陷，其高度低于红绿蓝色阻单元的高度。因此，对盒设置后白色色阻单元50处的盒厚D3与红、绿、蓝色阻单元处的盒厚(以绿色色阻单元20为例，如图中所示出的D1)不相等，最终导致显示屏亮度不均匀。
根据本公开的实施例，通过对红绿蓝白子像素进行优化，调节红色色阻和绿色色阻的比例得到二者的混合色阻，即黄色色阻(Y)来代替白色色阻，从而制作出亮度更高、色域更广、子像素点更多的显示面板。发明人发现，由红色色阻和绿色色阻混合得到的黄色色阻的工艺可控性要优于流动性大的平坦化膜材料。因此，黄色子像素不会出现凹陷，其高度与红绿蓝子像素的高度一致，并且在对盒设置后黄色子像素处的盒厚与红绿蓝子像素处的盒厚相等，由此提高了显示屏的亮度并且保证了亮度的均匀性。
下面根据本公开的具体实施例，对该彩膜基板的各个结构进行详细说明。
根据本公开的实施例，该彩膜基板的色阻单元包括红色色阻单元10、绿色色阻单元20、蓝色色阻单元30以及黄色色阻单元40。本领域技术人员能够理解的是，对于RGB三原色显示技术而言，RGB三原色对紫色、玫红等表现较丰富，但对于其他色彩表现均略显不足。而根据本公开实施例的RGBY显示技术，其对蓝、绿、黄等色彩的表现更加丰富，黄色作为过渡色提升了整个显示屏的色域，使得显示色彩更加细腻、丰富。
根据本公开的实施例，参考图2，所述黄色色阻单元40可以由在垂直于所述衬底基板100的方向上层叠的红色色阻段41以及绿色色阻段42构成。发明人发现，一定强度的光分别通过红、绿、蓝色阻时，红光、绿光、蓝光的亮度比约为3∶9∶1，因此通过采用红色色阻和绿色色阻的混合可以得到相对较高的亮度。也即是说，相对于基于RGB三原色显示而言，根据本公开实施例的彩膜基板(RGBY显示)提升了红色和绿色色阻的百分比，从而在改善显示屏的亮度不均的同时，能够提升显示屏亮度。根据本公开的实施例，黄色色阻单元40的高度，即红色色阻段41的高度以及绿色色阻段42的高度之和，与红色色阻单元10、绿色色阻单元20以及蓝色色阻单元30的高度一致。由黄色色阻单元40替代白色色阻单元，从而避免了红绿蓝色阻与白色色阻处的段差导致的盒厚不均，保证了不同颜色的色阻处对于隔垫物高度以及液晶量的有效控制，因此提升了显示屏的亮度。
根据本公开的实施例，采用红色色阻段41与绿色色阻段42形成黄色色阻单元40，不仅有利于控制黄色色阻单元40的高度，使得具有 该彩膜基板的液晶显示面板可以获得均一的盒厚，且有利于简化该彩膜基板的制备工艺，无需引入除去红、绿、蓝三种色阻层以外的材料。发明人发现，调节红色色阻段41与绿色色阻段42的高度比，可调节黄色色阻单元40的亮度。根据本公开的具体实施例，所述红色色阻段41以及所述绿色色阻段42的高度之比可以在0.5到0.75的范围内。由此，可以进一步提高显示屏的亮度。具体的，红色色阻段41与绿色色阻段42的高度比可以为2∶3。
根据本公开的实施例，参考图3，黄色色阻单元40还可以由同层且相邻地设置的红色色阻段41以及绿色色阻段42构成。其中，红色色阻段41以及绿色色阻段42的高度相等，并且该两个色阻段的高度与红色色阻单元10、绿色色阻单元20以及蓝色色阻单元30的高度相等，从而保证对盒设置后个子像素处的盒厚一致。为了提高显示屏的亮度，根据本公开的实施例，红色色阻段41的面积与绿色色阻段42的面积之比可以在0.6到0.75的范围内，从而进一步提高显示屏的亮度。具体的，红色色阻段41与绿色色阻段42的面积比可以为2∶3。
根据本公开的实施例，参考图5，彩膜基板包括红色色阻单元10、绿色色阻单元20、蓝色色阻单元30以及黄色色阻单元40，黄色色阻单元40由红色色阻段41与绿色色阻段42构成，使得黄色色阻单元40的高度与红绿蓝色阻单元的高度相等。在彩膜基板与阵列基板对盒设置后，黄色色阻单元40处的盒厚D2与红、绿、蓝色色阻单元处的盒厚(以图中所示出的D1为例)相等，从而提高了显示屏的亮度，并保证了显示屏亮度的均匀性。需要说明的是，在本公开中，红色色阻单元10、绿色色阻单元20、蓝色色阻单元30的具体高度，可以根据需要与该彩膜基板进行对盒的阵列基板的具体情况进行设计。也即是说，当阵列基板朝向该彩膜基板一侧的表面(例如，非平整的表面时)，红色色阻单元10、绿色色阻单元20、蓝色色阻单元30的高度也可以不全部相等，只要能够保证与所述多个色阻单元对应的位置处的液晶层厚度是相等的即可。
在本公开的另一方面，提出了一种液晶显示面板。根据本公开的实施例，该液晶显示面板包括以上实施例所述的彩膜基板、与所述彩膜基板相对设置的对置基板、以及布置在所述彩膜基板和所述对置基板之间的液晶层；其中，与所述多个色阻单元对应的位置处的液晶层 厚度是相等的。由此，该显示面板具有前面所述的彩膜基板的全部特征以及优点，在此不再赘述。利用以上布置，提高了该显示面板的显示屏透过率，同时也保证了显示屏亮度的均匀性。
如图5所示，在一个实施例中，该液晶显示面板包括以上实施例所述的彩膜基板、与所述彩膜基板相对设置的对置基板、以及布置在所述彩膜基板和所述对置基板之间的液晶层500；其中，与所述多个色阻单元对应的位置处的液晶层厚度D1、D2是相等的。
在本公开的另一个方面，提出了一种制备彩膜基板的方法。根据本公开的实施例，该方法制备的彩膜基板，可以为前面描述的彩膜基板。由此，利用该方法制备的彩膜基板，可以具有与前面描述的彩膜基板相同的特征以及优点，在此不再赘述。根据本公开的实施例，该方法包括：提供衬底基板；以及在所述衬底基板上阵列排布多个色阻单元，所述色阻单元包括红色色阻单元、绿色色阻单元、蓝色色阻单元和黄色色阻单元；其中，所述多个色阻单元的高度相等。由此，可以获得能够提高显示屏透过率，并能保证显示屏亮度均一的彩膜基板。
在一些实施例中，所述黄色色阻单元由在垂直于所述衬底基板的方向上层叠的红色色阻段以及绿色色阻段构成；其中，所述红色色阻段以及所述红色色阻单元是通过同一次构图工艺形成的，所述绿色色阻段以及所述绿色色阻单元是通过同一次构图工艺形成的。由此，可以利用简单的生产工艺获得由红色色阻段以及绿色色阻段在垂直于所述衬底基板的方向上层叠设置而构成的黄色色阻单元。根据本公开的具体实施例，红色色阻段与绿色色阻段的高度比可以为2∶3，由此可以进一步提高显示屏的亮度。
在一些实施例中，在所述衬底基板上阵列排布多个色阻单元包括：设置用于形成所述红色色阻单元以及所述红色色阻段的红色色阻层；通过第一构图工艺，基于所述红色色阻层形成所述红色色阻单元以及所述红色色阻段；设置用于形成所述绿色色阻单元以及所述绿色色阻段的绿色色阻层；通过第二构图工艺，基于所述绿色色阻层形成所述绿色色阻单元以及所述绿色色阻段。由此，可以进一步简化该方法的操作步骤。需要说明的是，上面描述中的“构图工艺”可以包括光刻、喷墨打印以及印刷处理等工艺，本领域技术人员可以根据实际情况进行设计。
在一些实施例中，所述红色色阻段以及所述绿色色阻段的高度之比在0.5到0.75的范围内。
在一些实施例中，所述黄色色阻单元由同层且相邻地设置的红色色阻段以及绿色色阻段构成；其中，所述红色色阻段以及所述红色色阻单元是通过同一次构图工艺形成的，所述绿色色阻段以及所述绿色色阻单元是通过同一次构图工艺形成的。由此，可以利用简单的生产工艺获得由同层且相邻地设置的红色色阻段以及绿色色阻段构成的黄色色阻单元。根据本公开的具体实施例，红色色阻段与绿色色阻段的面积之比可以为2∶3，由此可以进一步提高显示屏的亮度。
在一些实施例中，在所述衬底基板上阵列排布多个色阻单元包括：设置用于形成所述红色色阻单元以及所述红色色阻段的红色色阻层；通过第一构图工艺，基于所述红色色阻层形成所述红色色阻单元以及所述红色色阻段；设置用于形成所述绿色色阻单元以及所述绿色色阻段的绿色色阻层；通过第二构图工艺，基于所述绿色色阻层形成所述绿色色阻单元以及所述绿色色阻段。由此，可以进一步简化该方法的操作步骤。需要说明的是，上面描述中的“构图工艺”可以包括光刻、喷墨打印以及印刷处理等工艺，本领域技术人员可以根据实际情况进行设计。
在一些实施例中，所述红色色阻段以及所述绿色色阻段的面积之比在0.6到0.75的范围内。
例如，根据本公开的具体实施例，可以在基板上设置红色色阻层，然后通过第一构图工艺，形成红色色阻单元以及红色色阻段。并且，在第一构图工艺中，红色色阻段的厚度小于红色色阻单元的厚度。随后，可以在基板上设置绿色色阻层，然后通过第二构图工艺，形成绿色色阻单元以及绿色色阻段。并且，在第二构图工艺中，绿色色阻段的厚度小于绿色色阻单元的厚度。由此，可以形成由红色色阻段以及绿色色阻段层叠设置而构成的黄色色阻单元。本领域技术人员能够理解的是，由于黄色色阻单元由层叠设置的红色色阻段以及绿色色阻段构成，因此，在第一构图工艺以及第二构图工艺中，红色色阻段的厚度以及绿色色阻段的厚度之和应当与红色色阻单元、绿色色阻单元的厚度相等，以便保证该彩膜基板的多个色阻单元对应处的盒厚相等。需要说明的是，在本公开中，“第一构图工艺”以及“第二构图工艺” 仅为了区分两次构图工艺，而不能够理解为对其重要性或是顺序的限定。也即是说，在本公开中，可以首先进行第一构图工艺，也可以首先进行第二构图工艺。第一构图工艺以及第二构图工艺可以采用同种工艺，也可以选用不同的构图工艺。在第一构图工艺、第二构图工艺中，控制厚度的具体方式也不受特别限制，本领域技术人员可以根据具体选用的构图工艺进行选择。例如，当第一构图工艺为光刻时，红色色阻层可以为红色的色阻胶构成的，通过对红色色阻胶进行曝光、显影，形成红色色阻单元以及红色色阻段。通过对曝光量的控制，可以控制色阻胶成型的厚度，从而实现对红色色阻单元以及红色色阻段厚度的控制。根据本公开的另一些实施例，第一构图工艺也可以为喷墨打印。此时，可以通过对喷墨打印的喷墨材料的量的控制，实现对红色色阻单元以及红色色阻段厚度的控制。第二构图工艺也可以具有与上述第一构图工艺类似的特征，在此不再赘述。
根据本公开的另一些实施例，也可以通过第一构图工艺，以及第二构图工艺，形成红色色阻段以及绿色色阻段相邻设置的黄色色阻单元。本领域技术人员能够理解的是，当黄色色阻单元由相邻设置的红色色阻段以及绿色色阻段构成时：在第一构图工艺中，红色色阻段的面积小于红色色阻单元的面积；在第二构图工艺中，绿色色阻段的面积小于绿色色阻单元的面积。此时，红色色阻段、绿色色阻段、红色色阻单元以及绿色色阻单元的厚度均相等。此时的第一构图工艺以及第二构图工艺，也可以为光刻或是喷墨打印，等等。根据本公开的具体实施例，当第一构图工艺为光刻时，可以通过控制曝光掩膜的形状，令显影后获得的红色色阻段的面积小于红色色阻单元的面积；当第一构图工艺为喷墨打印时，也可以通过引入模板，或是控制喷墨打印的材料的量，令显影后获得的红色色阻段的面积小于红色色阻单元的面积。
根据本公开的具体实施例，参考图6，该方法利用光刻处理工艺形成红色色阻单元、绿色色阻单元、蓝色色阻单元以及黄色色阻单元的具体步骤可以如下：
S100：在基板上涂覆红色色阻胶。
根据本公开的实施例，在该步骤中，在基板上涂覆红色色阻胶，以便后续通过曝光、显影等处理，形成红色色阻单元以及红色色阻段。
S200：通过第一构图工艺，形成红色色阻单元以及红色色阻段。
根据本公开的实施例，在该步骤中，对红色色阻胶进行第一构图工艺处理，以便得到红色色阻单元以及红色色阻段。第一构图工艺可以包括基于曝光掩膜，对红色色阻胶形成的色阻层进行曝光处理。随后，对经过曝光处理的红色色阻胶进行显影处理，以便形成红色色阻单元以及红色色阻段，并去除剩余的红色色阻胶。
具体地，当黄色色阻单元由在垂直于所述衬底基板的方向上层叠的红色色阻段以及绿色色阻段构成时，红色色阻单元的厚度可以大于红色色阻段的厚度。具体地，形成红色色阻单元处的曝光掩膜的漏光区，可以与形成红色色阻段处的漏光区的形状一致，令红色色阻单元处的曝光量，不同于红色色阻段处的曝光量。具体的，红色色阻段处的曝光量可以为红色色阻单元处曝光量的40％，从而可以得到面积相同高度不同的红色色阻单元以及红色色阻段。
类似地，当黄色色阻单元由同层且相邻地设置的红色色阻段以及绿色色阻段构成时，可以令形成红色色阻单元处的曝光掩膜的漏光区的面积，不同于形成红色色阻段处的漏光区。具体的，红色色阻段处对应的漏光区的面积可以为红色色阻单元处漏光区面积的40％。通过采用相同的曝光量进行曝光处理，并经显影等处理，最终得到高度相同面积不同的红色色阻单元以及红色色阻段。
S300：在基板上涂覆绿色色阻胶。
根据本公开的实施例，在该步骤中，在基板上涂覆绿色色阻胶，以便后续通过曝光、显影等处理，形成绿色色阻单元以及绿色色阻段。
S400：通过第二构图工艺，形成绿色色阻单元以及绿色色阻段。
根据本公开的实施例，在该步骤中，对绿色色阻胶进行第二构图工艺处理，以便得到绿色色阻单元以及绿色色阻段。类似的，第二构图工艺可以包括基于曝光掩膜，对绿色色阻胶形成的色阻层进行曝光处理。随后，对经过曝光处理的绿色色阻胶进行显影处理，以便形成绿色色阻单元以及绿色色阻段，并去除剩余的绿色色阻胶。
具体地，当黄色色阻单元由层叠设置的红色色阻段以及绿色色阻段构成时，绿色色阻单元的厚度可以大于绿色色阻段的厚度。具体地，形成绿色色阻单元处的曝光掩膜的漏光区，可以与形成绿色色阻段处的漏光区的形状一致，令绿色色阻单元处的曝光量，不同于绿色色阻 段处的曝光量。具体的，绿色色阻段处的曝光量可以为绿色色阻单元处曝光量的60％，从而可以得到面积相同高度不同的绿色色阻单元以及绿色色阻段。
类似地，当黄色色阻单元由相邻设置的红色色阻段以及绿色色阻段构成时，形成绿色色阻单元处的曝光掩膜的漏光区的面积不同于形成绿色色阻段处的漏光区的面积。具体的，绿色色阻段处对应的漏光区的面积可以为绿色色阻单元处漏光区面积的60％。通过采用相同的曝光量进行曝光处理，并经显影等处理，最终得到高度相同面积不同的绿色色阻单元以及绿色色阻段。
需要说明的是，红色色阻单元与红色色阻段以及绿色色阻单元与绿色色阻段的制备顺序不受特别限制，本领域技术人员可以根据具体情况进行设计。例如，可以先制备红色色阻单元与红色色阻段，也可以先制备绿色色阻单元与绿色色阻段。
本领域技术人员能够理解的是，蓝色色阻单元可以是通过以下步骤制备的：首先在彩膜基板衬底上涂覆一层蓝色色阻胶，随后基于曝光掩膜版对蓝色色阻胶进行曝光、显影处理，得到蓝色色阻单元。需要说明的是，蓝色色阻单元的制备顺序不受特别限制，本领域技术人员可以根据实际情况进行设计。例如，可以在红色色阻单元、红色色阻段、绿色色阻单元、绿色色阻段制备之前，制备蓝色色阻单元，或者可以在红色色阻单元、红色色阻段、绿色色阻单元、绿色色阻段制备完成之后，制备蓝色色阻单元。
综上所述，根据本公开的实施例，利用RGBY显示技术避免了RGBW显示技术中子像素间的段差波动，有利于显示屏盒厚的均一性；提升了显示屏的分辨率以及亮度；提升了显示屏黄色色彩的显示效果；黄色色阻单元利用红色色阻单元以及绿色色阻单元的掩膜板进行制备，减少了掩膜板的使用，降低了成本。
在本说明书的描述中，参考术语“一个实施例”、“另一个实施例”等的描述意指结合该实施例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本 说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本公开的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域的普通技术人员在本公开的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (13)

  1. 一种彩膜基板，包括：
    衬底基板；
    在所述衬底基板上阵列排布的多个色阻单元，所述多个色阻单元包括红色色阻单元、绿色色阻单元、蓝色色阻单元和黄色色阻单元；
    其中，所述多个色阻单元的高度相等。
  2. 根据权利要求1所述的彩膜基板，其中，所述黄色色阻单元由在垂直于所述衬底基板的方向上层叠的红色色阻段以及绿色色阻段构成。
  3. 根据权利要求2所述的彩膜基板，其中，所述红色色阻段以及所述绿色色阻段的高度之比在0.5到0.75的范围内。
  4. 根据权利要求1所述的彩膜基板，其中，所述黄色色阻单元由同层且相邻地设置的红色色阻段以及绿色色阻段构成。
  5. 根据权利要求4所述的彩膜基板，其中，所述红色色阻段以及所述绿色色阻段的面积之比在0.6到0.75的范围内。
  6. 一种液晶显示面板，包括权利要求1-5任一项所述的彩膜基板、与所述彩膜基板相对设置的对置基板、以及布置在所述彩膜基板和所述对置基板之间的液晶层；
    其中，与所述多个色阻单元对应的位置处的液晶层厚度是相等的。
  7. 一种制备彩膜基板的方法，包括：
    提供衬底基板；以及
    在所述衬底基板上阵列排布多个色阻单元，所述色阻单元包括红色色阻单元、绿色色阻单元、蓝色色阻单元和黄色色阻单元；
    其中，所述多个色阻单元的高度相等。
  8. 根据权利要求7所述的方法，其中，所述黄色色阻单元由在垂直于所述衬底基板的方向上层叠的红色色阻段以及绿色色阻段构成；
    其中，所述红色色阻段以及所述红色色阻单元是通过同一次构图工艺形成的，所述绿色色阻段以及所述绿色色阻单元是通过同一次构图工艺形成的。
  9. 根据权利要求8所述的方法，其中，在所述衬底基板上阵列排布多个色阻单元包括：
    设置用于形成所述红色色阻单元以及所述红色色阻段的红色色阻层；
    通过第一构图工艺，基于所述红色色阻层形成所述红色色阻单元以及所述红色色阻段；
    设置用于形成所述绿色色阻单元以及所述绿色色阻段的绿色色阻层；
    通过第二构图工艺，基于所述绿色色阻层形成所述绿色色阻单元以及所述绿色色阻段。
  10. 根据权利要求8或9所述的方法，其中，所述红色色阻段以及所述绿色色阻段的高度之比在0.5到0.75的范围内。
  11. 根据权利要求7所述的方法，其中，所述黄色色阻单元由同层且相邻地设置的红色色阻段以及绿色色阻段构成；
    其中，所述红色色阻段以及所述红色色阻单元是通过同一次构图工艺形成的，所述绿色色阻段以及所述绿色色阻单元是通过同一次构图工艺形成的。
  12. 根据权利要求11所述的方法，其中，在所述衬底基板上阵列排布多个色阻单元包括：
    设置用于形成所述红色色阻单元以及所述红色色阻段的红色色阻层；
    通过第一构图工艺，基于所述红色色阻层形成所述红色色阻单元以及所述红色色阻段；
    设置用于形成所述绿色色阻单元以及所述绿色色阻段的绿色色阻层；
    通过第二构图工艺，基于所述绿色色阻层形成所述绿色色阻单元以及所述绿色色阻段。
  13. 根据权利要求11或12所述的方法，其中，所述红色色阻段以及所述绿色色阻段的面积之比在0.6到0.75的范围内。
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