WO2020038193A1 - 彩膜基板及其制造方法、显示装置 - Google Patents

彩膜基板及其制造方法、显示装置 Download PDF

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Publication number
WO2020038193A1
WO2020038193A1 PCT/CN2019/098214 CN2019098214W WO2020038193A1 WO 2020038193 A1 WO2020038193 A1 WO 2020038193A1 CN 2019098214 W CN2019098214 W CN 2019098214W WO 2020038193 A1 WO2020038193 A1 WO 2020038193A1
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Prior art keywords
color
shielding portion
light shielding
size
light
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PCT/CN2019/098214
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English (en)
French (fr)
Inventor
马春红
金羲雄
赵宝杰
Original Assignee
京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
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Priority to US16/647,698 priority Critical patent/US20200278579A1/en
Publication of WO2020038193A1 publication Critical patent/WO2020038193A1/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
    • G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
    • 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
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element

Definitions

  • Embodiments of the present disclosure relate to the field of display technology, and in particular, to a color filter substrate and a manufacturing method thereof, and a display device.
  • the liquid crystal display device is one of display devices which are widely used at present.
  • the liquid crystal display device mainly includes an array substrate, a color filter substrate, a polarizer, a backlight, and a liquid crystal.
  • Color film substrates are usually used to achieve color display.
  • Each pixel of the color filter substrate may be composed of three sub-pixels of red (R), green (G), and blue (B).
  • Embodiments of the present disclosure provide a color filter substrate, a manufacturing method thereof, and a display device.
  • a color filter substrate includes a substrate, a color resist and a light shielding portion located on the substrate.
  • the light shielding portions and the color resist are alternately disposed along the first direction.
  • the size of the light-shielding portion in the first direction depends on the sensitivity of the human eye to the color mixing of both sides of the light-shielding portion.
  • the size of the light shielding portion is directly proportional to the color mixing sensitivity of the human eye to the color resistance on both sides of the light shielding portion.
  • the size of the light shielding portion whose color mixing sensitivity on both sides is smaller than a predetermined threshold is smaller than the size of the light shielding portion whose color mixing sensitivity on both sides is smaller than a predetermined threshold.
  • the size of the color resistance along the first direction is the same.
  • the color resistance includes a red color resistance, a green color resistance, and a blue color resistance provided along the first direction.
  • the light-shielding section includes a first light-shielding section located between the red and blue color resists, a second light-shielding section between the red and green color resists, and a third light-shielding between the green and blue color resists. unit.
  • the size of the third light shielding portion is smaller than the size of the first light shielding portion and the size of the second light shielding portion.
  • a size of the first light shielding portion is smaller than a size of the second light shielding portion.
  • the size of the first light shielding portion is 4.0 ⁇ m
  • the size of the second light shielding portion is 4.5 ⁇ m
  • the size of the third light shielding portion is 3.5 ⁇ m
  • the size of the color resistance is 15 ⁇ m.
  • a display device includes a color filter substrate and an array substrate according to the first aspect of the present disclosure.
  • a light-shielding layer that is at least partially overlapped with the light-shielding portion of the color filter substrate is disposed on the array substrate at intervals.
  • a method for manufacturing a color filter substrate according to the first aspect of the present disclosure is provided.
  • a substrate is first provided, and then a color resist and a light shielding portion are formed on the substrate.
  • the color resistance and the light shielding portion are alternately disposed along the first direction.
  • the size of the light-shielding portion in the first direction depends on the sensitivity of the human eye to the color mixing of both sides of the light-shielding portion.
  • the size of the light shielding portion is set to be proportional to the color mixing sensitivity of the human eye to the color resistance on both sides of the light shielding portion.
  • the size of the light shielding portion where the color mixing resistance of the color resistance on both sides is less than a predetermined threshold is set to be smaller than the size of the light shielding portion having the color mixing sensitivity of the color resistance on both sides is greater than a predetermined threshold.
  • FIG. 1 shows a schematic cross-sectional view of a display device
  • FIG. 2 is a schematic plan view of a color filter substrate of the display device shown in FIG. 1;
  • FIG. 3 is a schematic cross-sectional view when the color filter substrate and the array substrate of the display device shown in FIG. 1 are not accurately aligned with a box;
  • FIG. 4 illustrates a schematic cross-sectional view of a color filter substrate according to an embodiment of the present disclosure
  • FIG. 5 illustrates a schematic top view of a color filter substrate according to an embodiment of the present disclosure
  • FIG. 6 illustrates a schematic cross-sectional view of a display device according to an embodiment of the present disclosure
  • FIG. 7 illustrates a schematic cross-sectional view when a color filter substrate and an array substrate of a display device are not accurately aligned with a box according to an embodiment of the present disclosure
  • FIG. 8 shows a schematic flowchart of a method for manufacturing a color filter substrate according to an embodiment of the present disclosure.
  • each layer is exaggerated for clarity. It should be understood that when referring to a layer, a region, or a component "on” another part, it means that it is directly on the other part, or there may be other components in between. In contrast, when a component is referred to as being “directly on” another, it means that no other component is in between.
  • the orientations or positional relationships indicated by the terms “up”, “down”, “left”, “right”, “inside”, “outside” and the like are based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present disclosure. And simplify the description, rather than indicating or implying that the machine or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the present disclosure.
  • FIG. 1 shows a schematic cross-sectional view of a part of a display device.
  • the display device is, for example, a liquid crystal display device.
  • the liquid crystal display device may include a color filter substrate 11, an array substrate 12, a liquid crystal layer 13 placed between the two substrates, and a backlight provided below the array substrate 12. Unit (not shown).
  • the color filter substrate 11 may include a substrate 110, a color resist, and a light shielding portion 111.
  • the color resistance may include a red color resistance R, a green color resistance G, and a blue color resistance B.
  • FIG. 2 is a schematic plan view of a color filter substrate of the display device shown in FIG. 1. As shown in FIGS. 1 and 2, the color resists and the light shielding portions 111 are alternately disposed.
  • the size O1 of the red color resistance R, the green color resistance G, and the blue color resistance B in the first direction D1 (for example, a direction parallel to the surface of the substrate 110) are all the same, for example, 15 ⁇ m.
  • the size CD0 of each light-shielding portion 111 along the first direction D1 is the same, and is, for example, 4.0 ⁇ m.
  • the array substrate 12 may include a light shielding layer (for example, a region where a thin film transistor TFT is provided) 121, a dielectric layer 120 (for example, a non-conductive layer), and a pixel electrode 122.
  • the light-shielding layer 121 is provided corresponding to the light-shielding portion 111 and can block light emitted from the backlight unit.
  • a size SD0 of the light shielding layer 121 along the first direction D1 may be larger than a size CD0 of the light shielding portion 111.
  • the size SD0 of the light shielding layer 121 is 4.5 ⁇ m.
  • the pixel electrode 122 may be controlled by a circuit, and an electric field is formed between the pixel electrode 122 and a common electrode (not shown), so that the liquid crystal molecules in the liquid crystal layer 13 are deflected. After the light emitted by the backlight unit passes through the array substrate 12, the liquid crystal layer 13 and the color filter substrate 11 in this order, the display device can display a color display and grayscale brightness.
  • the display device displays red.
  • the voltage on the pixel electrode 122 controls the liquid crystal molecules under the green color resistance G to deflect, light passes through the green color resistance G, and the display device displays green.
  • the array substrate and the color film substrate may be relatively offset after the box, that is, inaccurate alignment box.
  • the offset reaches a certain level, the light generated by the backlight unit in a monochrome picture may pass through the color resistance of two colors at the same time.
  • the human eye When viewed from a side viewing angle (such as when the angle between the human eye and the display panel is 30 °, 45 °, or 60 °), the human eye may observe a cross-color between multiple colors.
  • FIG. 3 shows a schematic cross-sectional view of the color filter substrate and the array substrate of the display device shown in FIG. 1 in a case where the box is not accurately aligned.
  • the array substrate 12 is offset from the color filter substrate 11 to the right by a certain distance. Accordingly, the pixel electrode 122 on the array substrate 12 is also shifted to the right.
  • the pixel electrode 122 is controlled in the same manner as in FIG. 1, not only the liquid crystal molecules below the red color resistance R are deflected, but also a part of the liquid crystal molecules below the right green color resistance G is also deflected.
  • the human eye since the size CD0 of the light shielding portion 111 is small, light can pass through the red color resistance R and the green color resistance G at the same time, so the human eye may observe a mixed color of red and green in a red or green side view angle (Ie, yellow). Similarly, when light passes through the red color resist R and the blue color resist B at the same time, the human eye may observe a mixed color of red and blue (ie, purple) in a red picture or a blue picture side viewing angle. When light passes through the green color barrier G and the blue color barrier B at the same time, the human eye may observe a mixed color of green and blue (ie, cyan) in a green picture or a blue picture side viewing angle.
  • each light shielding portion is the same, and the risk of color mixing is reduced by increasing the size of the light shielding portion as a whole.
  • this will affect the transmittance of the display device.
  • Limited by the requirement of transmittance the increase in the size of the light shielding portion is limited. Therefore, the degree of reducing the risk of color mixing by using this method is extremely limited, and at the same time, the transmittance of the display device is lost.
  • the human eye has different sensitivity to colors, the sensitivity is also different when observing the mixing of two colors. For example, because the human eye is more sensitive to yellow, in the red or green picture, it may be easier for the human eye to observe the yellow and red mixed color, that is, cross-color. Because the human eye is relatively insensitive to cyan, in the blue or green picture, it is not easy for the human eye to observe the occurrence of crosstalk between green and blue.
  • the embodiment of the present disclosure adjusts the size of the light shielding part based on the sensitivity of the human eye to color mixing, sets the position of the light shielding part where the risk of crosstalk is large (that is, the human eye can easily observe the color mixing), and has a wider size, and the risk of setting the crosstalk is small.
  • the size of the light-shielding portion at the position is narrow. The following describes it in detail with reference to the embodiments.
  • FIG. 4 illustrates a schematic cross-sectional view of a color filter substrate according to an embodiment of the present disclosure.
  • the color filter substrate 21 includes a substrate 210, a color resist and a light shielding portion located on the substrate 210.
  • the color resistance and the light shielding portion are alternately disposed along the first direction D1 (for example, a direction parallel to the surface of the substrate 210).
  • the color resistance may include a red color resistance R, a green color resistance G, and a blue color resistance B disposed along the first direction D1.
  • the light shielding portion may include a first light shielding portion 2111 located between the red color resistance R and the blue color resistance B, a second light shielding portion 2112 between the red color resistance R and the green color resistance G, and a green color resistance G and a blue color resistance.
  • each light-shielding portion along the first direction D1 depends on the sensitivity of the human eye to the color mixing of the two sides of the light-shielding portion.
  • the size CD1 of the first light-shielding portion 2111 depends on the sensitivity of the human eye to the mixed color of blue and red (ie, purple)
  • the size CD2 of the second light-shielding portion 2112 depends on the human color to the mixed color of red and green ( That is, the sensitivity of yellow)
  • the size CD3 of the third light-shielding portion 2113 depend on the sensitivity of the human eye to a mixed color of green and blue (ie, cyan).
  • Table 1 shows the occurrence of color mixing at different sizes of light shielding parts and different viewing angles when the color film substrate and the array substrate have a misalignment of 2.5 ⁇ m.
  • the size of the light-shielding portion is beneficial to reduce the probability of color mixing, and reducing the size of the light-shielding portion is easy to increase the color mixing probability.
  • the size of the light shielding portion at a position where the human eye can easily observe the mixed color is increased to reduce the probability that the human eye can observe the mixed color.
  • the size of the light-shielding portion at a position where it is difficult for the human eye to observe color mixing is reduced to ensure transmittance.
  • the size of the light shielding portion may be set to be proportional to the color mixing sensitivity of the human eye to the color resistance on both sides of the light shielding portion. It can be understood that the sensitivity of the human eye to yellow, purple, and cyan decreases in order. For example, since the color mixing of the color resistance on both sides of the second light-shielding portion 2112 is yellow and the sensitivity of the human eye to yellow is high, the size CD2 of the second light-shielding portion 2112 can be increased, for example, 4.5 ⁇ m to reduce the color mixture. risk.
  • the size CD1 of the first light-shielding portion 2111 can be set smaller than that of the second light-shielding portion 2112.
  • CD2 is, for example, 4.0 ⁇ m. That is, compared with the color filter substrate in FIG. 1, the size CD1 of the first light-shielding portion 2111 does not change, and the risk of color mixing does not change.
  • the mixed color of the color resists on both sides of the third light shielding portion 2113 is cyan, and it is difficult for human eyes to observe cyan.
  • FIG. 5 shows a schematic top view of a color filter substrate according to an embodiment of the present disclosure, wherein the color filter substrate has a structure such as the color filter substrate 21 in FIG. 4.
  • the size of the light shielding portion whose color mixing sensitivity on both sides of the light shielding portion is smaller than a predetermined threshold may be set to be smaller than the light shielding portion having a color mixing sensitivity on both sides of the light blocking portion which is greater than a predetermined threshold. size.
  • the predetermined threshold may be set according to actual needs based on the sensitivity of the human eye to the color mixing of the two colors. For example, the predetermined threshold may be set when the color mixing sensitivity of the two colors is lower than the predetermined threshold. The human eye is less sensitive to the color mixing, and the human eye is more sensitive to the color mixing when the color mixing sensitivity of the two colors is higher than a predetermined threshold.
  • a predetermined threshold is set so that the predetermined threshold is greater than the color mixing sensitivity of the green color resistance and the blue color resistance on both sides of the third light shielding portion 2113, and is smaller than that of the second light shielding portion 2112.
  • the size CD3 of the third light shielding portion 2113 may be set to be smaller than the size CD1 of the first light shielding portion 2111 and smaller than the size CD2 of the second light shielding portion 2112.
  • the size CD1 of the first light-shielding portion 2111 and the size CD2 of the second light-shielding portion 2112 may be designed according to the actual color mixing situation, and the relative sizes of the two are not specifically limited.
  • the size CD1 of the first light shielding portion 2111 may be larger than the size CD2 of the second light shielding portion 2112
  • the size CD1 of the first light shielding portion 2111 may be equal to the size CD2 of the second light shielding portion 2112
  • the size CD1 of the first light shielding portion 2111 may be The size CD2 is larger than the size CD2 of the second light shielding portion 2112.
  • the dimensions O1 of the red color resistor R, the blue color resistor B, and the green color resistor G in the first direction D1 are all the same, for example, 15 ⁇ m. This ensures the transmittance of the display device.
  • a method of setting a multi-line-width light-shielding portion is used to reduce the risk of color mixing.
  • the line width of the light-shielding portion in the position where the color mixing risk is high is designed to be wide, and the line width of the light-shielding portion in the position where the color mixing risk is small is designed to be narrow. Therefore, it is possible to improve the color mixing problem without reducing the transmittance.
  • an embodiment of the present disclosure further provides a display device.
  • FIG. 6 illustrates a schematic cross-sectional view of a display device according to an embodiment of the present disclosure.
  • the display device includes the color film substrate 21, the array substrate 22 described above, the liquid crystal layer 23 placed between the two substrates, and a backlight unit (not shown) provided below the array substrate 22.
  • the array substrate 22 is provided with light-shielding layers at least partially overlapping the light-shielding portions of the color filter substrate 21 at intervals.
  • the light-shielding layer may include a first light-shielding layer 2211 at least partially overlapping with the first light-shielding portion 2111, a second light-shielding layer 2212 at least partially overlapping with the second light-shielding portion 2112, and a third light-shielding portion 2113 at least partially overlapping Third light-shielding layer 2213.
  • the size of the light-shielding layer in the first direction D1 is slightly larger than the size of the light-shielding portion opposite thereto.
  • the size of the light-shielding layer of the light-shielding portion corresponding to the position where the cross-color risk is high is larger than the size of the light-shielding portion corresponding to the position of the cross-color risk is small.
  • the size CD1 of the first light-shielding portion 2111 is 4.0 ⁇ m
  • the size SD1 of the first light-shielding layer 2211 is 4.5 ⁇ m.
  • the size CD2 of the second light shielding portion 2112 is 4.5 ⁇ m, and the size SD2 of the second light shielding layer 2212 is 5.0 ⁇ m.
  • the size CD3 of the third light shielding portion 2113 is 3.5 ⁇ m, and the size SD3 of the third light shielding layer 2213 is 4.0 ⁇ m.
  • the size of the light-shielding portion at a position where the risk of cross-coloring is high is increased, the size of the light-shielding portion at a position where the risk of cross-coloring is small is reduced, and the risk of cross-coloring of the display device is reduced without affecting the transmittance.
  • FIG. 7 schematically illustrates a cross-sectional view of a color filter substrate and an array substrate of a display device according to an embodiment of the present disclosure without being accurately aligned with a box.
  • the array substrate 22 is shifted to the right relative to the color filter substrate 21, and the pixel electrode 222 on the array substrate 22 is also shifted to the right accordingly.
  • the pixel electrode 222 controls the deflection of the liquid crystal molecules under the red color resistance R, the deflected liquid crystal molecules do not extend beyond the range of the second light-shielding portion due to the increase in the size CD of the second light-shielding portion 2112, so that cross-colors are avoided phenomenon.
  • FIG. 8 schematically shows a flowchart of steps of a method for manufacturing a color filter substrate according to an embodiment of the present disclosure.
  • a substrate is provided.
  • a color resist and a light shielding portion are formed on the substrate.
  • the color resists and the light shielding portions are alternately disposed along the first direction. The size of the light-shielding portion in the first direction depends on the sensitivity of the human eye to the color mixing of both sides of the light-shielding portion.
  • the size of the light shielding portion is set to be proportional to the color mixing sensitivity of the human eye to the color resistance on both sides of the light shielding portion.
  • the size of the light-shielding portion whose color mixing sensitivity on both sides is less than a predetermined threshold is set to be smaller than the size of the light-shielding portion whose color mixing sensitivity on both sides is greater than a predetermined threshold.

Abstract

本公开的实施例提供了彩膜基板及其制造方法和显示装置。彩膜基板包括衬底以及位于衬底上色阻和遮光部。色阻与遮光部沿第一方向交替设置。遮光部沿第一方向的尺寸依赖于人眼对遮光部两侧的色阻的混色敏感度。

Description

彩膜基板及其制造方法、显示装置
相关申请的交叉引用
本申请要求于2018年8月24日递交的申请号为201810971887.7的中国专利申请的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及显示技术领域，具体地涉及彩膜基板及其制造方法、以及显示装置。
背景技术
液晶显示装置是目前应用较广泛的显示设备之一。液晶显示装置主要包括阵列基板、彩膜基板、偏光片、背光源和液晶等。彩膜基板通常用于实现彩色显示。彩膜基板的每一个像素可由红(R)、绿(G)、蓝(B)三个子像素组成。
发明内容
本公开的实施例提供了彩膜基板及其制造方法和显示装置。
根据本公开的第一方面，提供了一种彩膜基板。彩膜基板包括衬底、位于衬底上的色阻和遮光部。遮光部与色阻沿第一方向交替设置。遮光部沿第一方向的尺寸依赖于人眼对遮光部两侧的色阻的混色敏感度。
在本公开的实施例中，遮光部的尺寸与人眼对遮光部两侧的色阻的混色敏感度成正比。
在本公开的实施例中，两侧的色阻的混色敏感度小于预定阈值的遮光部的尺寸小于两侧的色阻的混色敏感度大于预定阈值的遮光部的尺寸。
在本公开的实施例中，色阻沿第一方向的尺寸相同。
在本公开的实施例中，色阻包括：沿第一方向设置的红色色阻、绿色 色阻和蓝色色阻。遮光部包括：位于红色色阻和蓝色色阻之间的第一遮光部，位于红色色阻和绿色色阻之间的第二遮光部，位于绿色色阻和蓝色色阻之间的第三遮光部。第三遮光部的尺寸小于第一遮光部的尺寸和第二遮光部的尺寸。
在本公开的实施例中，第一遮光部的尺寸小于第二遮光部的尺寸。
在本公开的实施例中，第一遮光部的尺寸是4.0μm，第二遮光部的尺寸是4.5μm，第三遮光部的尺寸是3.5μm，色阻的尺寸是15μm。
根据本公开的第二方面，提供了一种显示装置。显示装置包括根据本公开的第一方面的彩膜基板和阵列基板。阵列基板上间隔设置有与彩膜基板的遮光部至少部分重合的遮光层。
根据本公开的第三方面，提供了一种用于制造根据本公开的第一方面的彩膜基板的方法。在方法中，首先提供衬底，然后在衬底上形成色阻和遮光部。色阻和遮光部沿第一方向交替设置。遮光部沿第一方向的尺寸依赖于人眼对遮光部两侧的色阻的混色敏感度。
在本公开的实施例中，将遮光部的尺寸设置为与人眼对遮光部两侧的色阻的混色敏感度成正比。
在本公开的实施例中，设置两侧的色阻的混色敏感度小于预定阈值的遮光部的尺寸小于两侧的色阻的混色敏感度大于预定阈值的遮光部的尺寸。
附图说明
为了更清楚地说明本公开的技术方案，下面将对实施例的附图进行简单说明。应当知道，以下描述的附图仅仅是本公开的一些实施例，而非对本公开的限制，其中相同的附图标记指示相同的部分。在附图中：
图1示出了显示装置的示意性截面图；
图2示出了如图1所示的显示装置的彩膜基板的示意性俯视图；
图3示出了如图1所示的显示装置的彩膜基板和阵列基板不准确对盒时的示意性截面图；
图4示出了根据本公开的实施例的彩膜基板的示意性截面图；
图5示出了根据本公开的实施例的彩膜基板的示意性俯视图；
图6示出了根据本公开的实施例的显示装置的示意性截面图；
图7示出了根据本公开的实施例的显示装置的彩膜基板和阵列基板不准确对盒时的示意性截面图；
图8示出了根据本公开的实施例的用于制造彩膜基板的方法的示意性流程图。
具体实施方式
为了使本公开的实施例的目的、技术方案和优点更加清楚，下面将结合附图，对本公开的实施例的技术方案进行清楚、完整的描述。显然，所描述的实施例仅仅是本公开的一部分实施例，而并非全部的实施例。基于所描述的实施例，本领域的普通技术人员在无需创造性劳动的前提下所获得的所有其它实施例，也都属于本公开的范围。
首先需要说明的是，除非上下文中另外明确地指出，否则在本文和所附权利要求中所使用的词语的单数形式包括复数，反之亦然。因而，当提及单数时，通常包括相应术语的复数。相似地，措辞“包含”和“包括”将解释为包含在内而不是独占性地，除非本文中明确禁止这样的解释。在本文中使用术语“示例”之处，特别是当其位于一组术语之后时，所述“示例”仅仅是示例性的和阐述性的，且不应当被认为是独占性的或广泛性的。
此外，在附图中，为了清楚起见，夸大了各层的厚度及区域。应当理解的是，当提到层、区域、或组件在别的部分“上”时，指其直接位于别的部分上，或者也可能有别的组件介于其间。相反，当某个组件被提到“直接”位于别的组件上时，指并无别的组件介于其间。术语“上”、“下”、“左”、“右”、“内”、“外”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和简化描述，而不是指示或暗示所指的机或元件必须具有特定的方位、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。
图1示出了显示装置的一部分的示意性截面图。如图1所示，显示装置例如是液晶显示装置，液晶显示装置可包括彩膜基板11、阵列基板12、在两个基板之间放置的液晶层13、以及在阵列基板12的下方设置的背光单元(未示出)。
彩膜基板11可包括衬底110、色阻和遮光部111。根据本公开的实施例，该色阻可以包括红色色阻R、绿色色阻G和蓝色色阻B。图2示出了如图1所示的显示装置的彩膜基板的示意性俯视图。如图1和图2所示，色阻和遮光部111交替设置。红色色阻R、绿色色阻G和蓝色色阻B沿第一方向D1(例如，平行于衬底110表面的方向)的尺寸O1均相同，例如为15μm。各遮光部111沿第一方向D1的尺寸CD0均相同，例如为4.0μm。
如图1所示，阵列基板12可包括遮光层(例如，设置薄膜晶体管TFT的区域)121、介质层120(例如，非导电层)和像素电极122。遮光层121与遮光部111相对应地设置，且可遮挡背光单元发出的光。根据本公开的实施例，遮光层121沿第一方向D1的尺寸SD0可以大于遮光部111的尺寸CD0。例如，遮光层121的尺寸SD0为4.5μm。像素电极122可被电路控制，在像素电极122与公共电极(未示出)之间形成电场，从而使得液晶层13中的液晶分子发生偏转。在背光单元发出的光依次经过阵列基板12、液晶层13和彩膜基板11后，显示装置可呈现彩色显示和灰阶亮度。
在彩膜基板11和阵列基板12准确对盒的情况下，当控制阵列基板12上的像素电极122上的电压以使得某种颜色的色阻下方的液晶分子偏转时，背光单元发出的光经过透过该色阻，使得显示装置的对应位置处可以显示相应的颜色。如图1所示，当像素电极122上的电压使得红色色阻R下方的液晶分子偏转时，光透过红色色阻R，显示装置显示红色。此外，当像素电极122上的电压控制绿色色阻G下方的液晶分子偏转时，光透过绿色色阻G，显示装置显示绿色。当像素电极122上的电压控制蓝色色阻B下方的液晶分子偏转时，光透过蓝色色阻B，显示装置显示蓝色。每个色阻的两侧设置有遮光部111，以避免光同时透过两个颜色的色阻而发生混色现象。因此，当彩膜基板11和阵列基板12对盒精确、两者没有产生相对 移动时，对于单色画面(红/绿/蓝)，人眼在侧视角下观察不到串色现象。
然而，在显示装置中，由于阵列基板和彩膜基板各自的制备工艺、对盒工艺及设备等因素的影响，所以阵列基板和彩膜基板对盒后可能会发生相对偏移，即不精准对盒。当偏移达到一定程度时，单色画面下背光单元产生的光可能同时透过两种颜色的色阻。在侧视角观察时(如人眼与显示面板夹角为30°、45°或60°时)，人眼可能观察到多种颜色之间的串色。
图3示出了如图1所示的显示装置的彩膜基板和阵列基板在不准确对盒的情况下的示意性截面图。如图3所示，阵列基板12相对彩膜基板11向右偏移一定距离。相应地，阵列基板12上的像素电极122也向右偏移。当采用与图1相同的方式控制像素电极122时，不仅红色色阻R下方的液晶分子发生偏转，其右侧绿色色阻G下方的部分液晶分子也发生偏转。
在此情况下，由于遮光部111的尺寸CD0较小，光可同时透过红色色阻R和绿色色阻G，因此人眼可能在红色画面或绿色画面侧视角下观察到红色和绿色的混色(即，黄色)。类似地，当光同时透过红色色阻R和蓝色色阻B时，人眼可能在红色画面或蓝色画面侧视角下观察到红色和蓝色的混色(即，紫色)。当光同时透过绿色色阻G和蓝色色阻B时，人眼可能在绿色画面或蓝色画面侧视角下观察到绿色和蓝色的混色(即，青色)。
通常，各遮光部的尺寸相同，并且通过整体增大遮光部尺寸的方式来降低混色发生的风险。然而，这样会影响显示装置的透过率。受限于透过率的要求，遮光部尺寸的增大程度有限。因此，利用这种方式来降低混色发生风险的程度极其有限，同时会使显示装置的透过率受到损失。
由于人眼对颜色的敏感度不同，因此在观察两种颜色混色时敏感度也不同。例如，由于人眼对黄色较为敏感，在红色或绿色画面中，因此人眼可能更容易观察到红色和绿色的黄色混色，即串色。由于人眼对青色相对不敏感，在蓝色或绿色画面中，因此人眼不容易观察到绿色和蓝色发生串色。
本公开的实施例基于人眼对混色的敏感度来调整遮光部的尺寸，设置串色风险大(即人眼容易观察到混色)的位置的遮光部的尺寸较宽，以及 设置串色风险小的位置的遮光部的尺寸较窄。以下结合实施例进行详细描述。
图4示出了根据本公开的实施例的彩膜基板的示意性截面图。如图4所示，彩膜基板21包括衬底210、位于衬底210上的色阻和遮光部。色阻与遮光部沿第一方向D1(例如，平行于衬底210表面的方向)交替设置。在实施例中，色阻可包括沿第一方向D1设置的红色色阻R、绿色色阻G和蓝色色阻B。遮光部可包括位于红色色阻R和蓝色色阻B之间的第一遮光部2111，位于红色色阻R和绿色色阻G之间的第二遮光部2112，位于绿色色阻G和蓝色色阻B之间的第三遮光部2113。
各遮光部沿第一方向D1的尺寸依赖于人眼对遮光部两侧的色阻的混色敏感度。具体地，第一遮光部2111的尺寸CD1依赖于人眼对蓝色和红色的混色(即，紫色)的敏感度，第二遮光部2112的尺寸CD2依赖于人眼对红色和绿色的混色(即，黄色)的敏感度，第三遮光部2113的尺寸CD3依赖于人眼对绿色和蓝色的混色(即，青色)的敏感度。
下表1示出了在彩膜基板和阵列基板对位偏差为2.5μm时，在不同尺寸的遮光部和不同观察角度下的混色发生率。
表1
Figure PCTCN2019098214-appb-000001
如表1所示，增大遮光部的尺寸有利于减小混色发生概率，而减小遮光部的尺寸则容易增大混色发生概率。此外，观察角度越大，所观察的混色发生概率越高。在实施例中，将人眼容易观察到混色的位置的遮光部尺寸增大，以减小人眼观察到混色的概率。同时，将人眼不容易观察到混色的位置的遮光部尺寸减小，以保证透过率。
在本公开的实施例中，遮光部的尺寸可被设置为与人眼对遮光部两侧的色阻的混色敏感度成正比。可以理解，人眼对黄色、紫色、青色的敏感度依次递减。例如，由于第二遮光部2112两侧色阻的混色为黄色，且人眼 对黄色的敏感度较高，因此可增大第二遮光部2112的尺寸CD2，例如为4.5μm，以减小混色风险。此外，第一遮光部2111两侧色阻的混色为紫色，人眼对紫色的敏感度低于对黄色的敏感度，因此可设置第一遮光部2111的尺寸CD1小于第二遮光部2112的尺寸CD2，例如为4.0μm。也就是说，与图1中的彩膜基板相比，第一遮光部2111的尺寸CD1不变，混色风险不变。另一方面，第三遮光部2113两侧色阻的混色为青色，而人眼不易观察到青色。因此，在两个基板偏差在一定范围内时，可不考虑其串色风险。通过减小第三遮光部2113的尺寸CD3，例如将其设置为3.5μm，而保证显示装置的透过率不变。图5示出了根据本公开的实施例的彩膜基板的示意性俯视图，其中彩膜基板具有例如图4中的彩膜基板21的结构。
在另一实施例中，也可将遮光部两侧的色阻的混色敏感度小于预定阈值的遮光部的尺寸设置为小于两侧的色阻的混色敏感度大于预定阈值的遮光部的所述尺寸。根据本发明的实施例，预定阈值可以基于人眼对两种颜色的混色敏感度根据实际需要来设定，例如，预定阈值可以被设定为在两种颜色的混色敏感度低于预定阈值时人眼对该混色较不敏感，而当两种颜色的混色敏感度高于预定阈值时人眼对该混色较敏感。例如，以图4的色阻配置为例，设置预定阈值，以使得该预定阈值大于第三遮光部2113两侧的绿色色阻和蓝色色阻的混色敏感度，并且小于第二遮光部2112两侧的红色色阻和绿色色阻以及第一遮光部2111两侧的蓝色色阻和红色色阻的混色敏感度。例如，第三遮光部2113的尺寸CD3可被设置为小于第一遮光部2111的尺寸CD1，且小于第二遮光部2112的尺寸CD2。此外，可根据生产实际混色情况设计第一遮光部2111的尺寸CD1和第二遮光部2112的尺寸CD2，而不对二者的相对大小进行具体限定。例如，第一遮光部2111的尺寸CD1可大于第二遮光部2112的尺寸CD2，第一遮光部2111的尺寸CD1可等于第二遮光部2112的尺寸CD2，或者第一遮光部2111的尺寸CD1可大于第二遮光部2112的尺寸CD2。
此外，如图所示，红色色阻R、蓝色色阻B和绿色色阻G沿第一方向D1的尺寸O1均相同，例如为15μm。由此，保证了显示装置的透过率。
根据本公开的实施例，基于人眼对混色的敏感度，采用设置多线宽的遮光部的方式来降低混色发生的风险。将混色风险大的位置的遮光部的线宽设计的较宽，混色风险小的位置的遮光部的线宽设计的较窄。因此，可以在不降低透过率的情况下改善混色问题。
基于以上描述，本公开实施例还提供了显示装置。
图6示出了根据本公开的实施例的显示装置的示意性截面图。如图6所示，显示装置包括如上描述的彩膜基板21、阵列基板22、在两个基板之间放置的液晶层23、以及在阵列基板22的下方设置的背光单元(未示出)。
阵列基板22上间隔设置有与彩膜基板21的遮光部至少部分重合的遮光层。具体地，遮光层可包括与第一遮光部2111至少部分重合的第一遮光层2211，与第二遮光部2112至少部分重合的第二遮光层2212，以及与第三遮光部2113至少部分重合的第三遮光层2213。
如图6所示，遮光层沿第一方向D1的尺寸略大于与其相对的遮光部的尺寸。在实施例中，对应于串色风险大的位置的遮光部的遮光层的尺寸大于对应于串色风险小的位置的遮光部的尺寸。例如，第一遮光部2111的尺寸CD1为4.0μm，第一遮光层2211的尺寸SD1为4.5μm。第二遮光部2112的尺寸CD2为4.5μm，第二遮光层2212的尺寸SD2为5.0μm。第三遮光部2113的尺寸CD3为3.5μm，第三遮光层2213的尺寸SD3为4.0μm。
根据本公开的实施例，增大串色风险大的位置的遮光部的尺寸，减小串色风险小的位置的遮光部的尺寸，降低显示装置的串色风险，且不影响透过率。
图7示意性示出了根据本公开的实施例的显示装置的彩膜基板和阵列基板在不准确对盒的情况下的截面图。如图7所示，阵列基板22相对于彩膜基板21向右偏移，阵列基板22上的像素电极222也相应地向右偏移。虽然像素电极222控制红色色阻R下方的液晶分子发生偏转，但是由于第二遮光部2112的尺寸CD增大，发生偏转的液晶分子不会延伸超过第二遮光部的范围，因此避免发生串色现象。
图8示意性示出了根据本公开的实施例的用于制造彩膜基板的方法的 步骤的流程图。在步骤S810中，提供衬底。在步骤S820中，在衬底上形成色阻和遮光部。在实施例中，色阻和遮光部沿第一方向交替设置。遮光部沿第一方向的尺寸依赖于人眼对遮光部两侧的色阻的混色敏感度。
在本公开的实施例中，将遮光部的尺寸设置为与人眼对遮光部两侧的色阻的混色敏感度成正比。
在另一实施例中，设置两侧的色阻的混色敏感度小于预定阈值的遮光部的尺寸小于两侧的色阻的混色敏感度大于预定阈值的遮光部的尺寸。
以上对本公开的若干实施方式进行了详细描述，但本公开的保护范围并不限于此。显然，对于本领域的普通技术人员来说，在不脱离本公开的精神和范围的情况下，可以对本公开的实施例进行各种修改、替换或变形。本公开的保护范围由所附权利要求限定。

Claims (11)

  1. 一种彩膜基板，包括：
    衬底；
    色阻，位于所述衬底上；以及
    遮光部，位于所述衬底上，与所述色阻沿第一方向交替设置，
    其中，所述遮光部沿所述第一方向的尺寸依赖于人眼对所述遮光部两侧的色阻的混色敏感度，遮光部两侧的色阻的颜色不同。
  2. 根据权利要求1所述的彩膜基板，其中，
    所述遮光部的所述尺寸与人眼对所述遮光部两侧的色阻的混色敏感度成正比。
  3. 根据权利要求1所述的彩膜基板，其中，
    两侧的色阻的混色敏感度小于预定阈值的所述遮光部的所述尺寸小于两侧的色阻的混色敏感度大于所述预定阈值的所述遮光部的所述尺寸。
  4. 根据权利要求1至3中任一项所述的彩膜基板，其中，
    所述色阻沿所述第一方向的尺寸相同。
  5. 根据权利要求4中任一项所述的彩膜基板，其中，
    所述色阻包括：沿所述第一方向设置的红色色阻、绿色色阻和蓝色色阻；
    所述遮光部包括：位于红色色阻和蓝色色阻之间的第一遮光部，位于红色色阻和绿色色阻之间的第二遮光部，位于绿色色阻和蓝色色阻之间的第三遮光部；
    其中，所述第三遮光部的尺寸小于所述第一遮光部的尺寸和所述第二遮光部的尺寸。
  6. 根据权利要求5所述的彩膜基板，其中，
    所述第一遮光部的尺寸小于所述第二遮光部的尺寸。
  7. 根据权利要求6所述的彩膜基板，其中，
    所述第一遮光部的尺寸是4.0μm，所述第二遮光部的尺寸是4.5μm，所 述第三遮光部的尺寸是3.5μm，所述色阻的尺寸是15μm。
  8. 一种显示装置，包括：
    根据权利要求1至7中任一项所述的彩膜基板；以及
    阵列基板，其中，所述阵列基板上间隔设置有与所述彩膜基板的遮光部在垂直于衬底的方向上至少部分重合的遮光层。
  9. 一种制造如权利要求1至5中任一项所述的彩膜基板的方法，包括：
    提供衬底；
    在所述衬底上形成色阻和遮光部，所述色阻和所述遮光部沿第一方向交替设置，其中，所述遮光部沿所述第一方向的尺寸依赖于人眼对所述遮光部两侧的色阻的混色敏感度，遮光部两侧的色阻的颜色不同。
  10. 根据权利要求9所述的方法，其中，
    将所述遮光部的所述尺寸设置为与人眼对所述遮光部两侧的色阻的混色敏感度成正比。
  11. 根据权利要求9所述的方法，其中，
    设置两侧的色阻的混色敏感度小于预定阈值的所述遮光部的所述尺寸小于两侧的色阻的混色敏感度大于所述预定阈值的所述遮光部的所述尺寸。
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