CN109001942B - Display panel and method for manufacturing the same - Google Patents
Display panel and method for manufacturing the same Download PDFInfo
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- CN109001942B CN109001942B CN201811182493.XA CN201811182493A CN109001942B CN 109001942 B CN109001942 B CN 109001942B CN 201811182493 A CN201811182493 A CN 201811182493A CN 109001942 B CN109001942 B CN 109001942B
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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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
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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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13398—Spacer materials; Spacer properties
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Abstract
The invention discloses a display panel and a manufacturing method thereof, wherein the display panel comprises a pixel array substrate, a display medium layer, a color filter element substrate and a plurality of polymer walls. The display medium layer and the plurality of polymer walls are positioned between the pixel array substrate and the color filter element substrate. The color filter element substrate comprises a substrate, a color filter element, a polymer wall defining layer and a plurality of transparent spacers. The color filter element is positioned on the substrate and comprises a plurality of first through holes. The polymer wall defining layer is located on the color filter element and comprises a plurality of second through holes. The second through holes are respectively overlapped with the first through holes in the direction vertical to the substrate. A plurality of transparent spacers are located in the first and second through holes. The polymer walls and the transparent spacers overlap in a direction perpendicular to the substrate.
Description
Technical Field
The present invention relates to an electro-optical device and a method for manufacturing the same, and more particularly, to a display panel and a method for manufacturing the same.
Background
With the progress of technology, when the display medium material layer of the display panel includes the photo-polymerization monomer, a photo mask is used to cover the substrate, and then the substrate is irradiated with light, so that the light passes through the photo mask and the light holes of the display panel to generate a polymer wall (polymer wall) in the display medium layer. However, since light reaches the display medium after passing through media having different refractive indexes and/or thicknesses such as air, a photomask, and a glass substrate, a difference in optical path is easily generated due to refraction, and the size of the formed polymer wall is larger than an original design value, thereby decreasing the aperture ratio of the display panel. Therefore, a solution to the above problem is needed.
Disclosure of Invention
The invention provides a display panel, which can solve the problem of uneven shape and/or width of a polymer wall.
The invention provides a manufacturing method of a display panel, which can solve the problem of uneven shape and/or width of a polymer wall.
The invention discloses a display panel, which comprises a pixel array substrate, a display medium layer, a color filter element substrate and a plurality of polymer walls. The display medium layer is positioned between the pixel array substrate and the color filter element substrate. The polymer walls are positioned between the pixel array substrate and the color filter element substrate. The color filter element substrate comprises a substrate, a color filter element, a polymer wall defining layer and a plurality of transparent spacers. The color filter element is positioned on the substrate and comprises a plurality of first through holes. The polymer wall defining layer is located on the color filter element and comprises a plurality of second through holes. The second through holes are respectively overlapped with the first through holes in the direction vertical to the substrate. A plurality of transparent spacers are located in the first and second through holes. The polymer walls and the transparent spacers overlap in a direction perpendicular to the substrate.
The invention discloses a manufacturing method of a display panel, which comprises the steps of forming a color filter element substrate, covering a pixel array substrate on the color filter element substrate, forming a display medium material layer between the pixel array substrate and the color filter element substrate, irradiating ultraviolet light on the color filter element substrate, enabling the ultraviolet light to penetrate through a transparent isolating piece, and enabling a photopolymerization monomer to polymerize into a plurality of polymer walls. The method for forming the color filter element substrate comprises the steps of providing a substrate, forming a plurality of transparent spacers on the substrate, forming a color filter element on the substrate, and forming a polymer wall definition layer on the color filter element. The color filter element includes a plurality of first through holes. The polymer wall definition layer includes a plurality of second through holes. The second through hole overlaps the first through hole in a direction perpendicular to the substrate. The transparent spacer is located in the first through hole and the second through hole. The display medium material layer comprises a plurality of display media and a plurality of photo-polymerization monomers. The polymer walls and the transparent spacers overlap in a direction perpendicular to the substrate.
Based on the above, the display panel and the manufacturing method thereof of the invention can improve the problem of uneven shape and/or width of the polymer wall, and improve the display quality of the display panel.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1A to fig. 1E are schematic diagrams illustrating a manufacturing process of a display panel according to an embodiment of the invention;
FIG. 2A is a schematic top view of a part of a color filter substrate according to an embodiment of the present invention;
FIG. 2B is a schematic top view of a part of the color filter substrate according to an embodiment of the invention;
FIG. 2C is a schematic top view of a part of the color filter substrate according to an embodiment of the invention;
fig. 2D is a schematic top view of a part of the elements of a pixel array substrate according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a display panel according to another embodiment of the invention.
Description of the symbols
10. 20, 30, 40: display panel
100: color filter element substrate
110: substrate
120: transparent spacer
130: color filter element
140: polymer wall definition layer
142: a first transparent electrode
142a, 146 a: conducting wire
142b, 146 b: electrode for electrochemical cell
144: electrochromic layer
146: a second transparent electrode
150: planarization layer
200: display medium material layer
200': display medium layer
210: display medium
220: photopolymerizable monomers
220': polymer wall
300: pixel array substrate
AA': thread
B: blue color filter pattern
BM: shading pattern
D1: direction of rotation
DL: data line
GL: scanning line
G: green light filtering pattern
O1: first through hole
O2: second through hole
P: pixel structure
PE: pixel electrode
R: red filter pattern
T: active (active) element
UV: ultraviolet light
θ: degree of the meter
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, without departing from the spirit or scope of the present invention.
Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Exemplary embodiments are described herein with reference to cross-sectional views that are schematic illustrations of idealized embodiments. Thus, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or (and/or) tolerances, are to be expected. Thus, the embodiments described herein should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, a region shown or described as flat may generally have rough and/or nonlinear features. Further, the acute angles shown may be rounded. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.
Fig. 1A to fig. 1E are schematic diagrams illustrating a manufacturing process of a display panel according to an embodiment of the invention. Fig. 2A is a schematic top view of a part of the color filter substrate according to an embodiment of the invention. Fig. 2B is a schematic top view of a part of the color filter substrate according to an embodiment of the invention. Fig. 2C is a schematic top view of a part of the color filter substrate according to an embodiment of the invention. Fig. 2D is a schematic top view of a part of the elements of the pixel array substrate according to an embodiment of the invention.
Referring to fig. 1A to 1C, the color filter substrate 100 includes a substrate 110, a plurality of transparent spacers 120, a color filter 130, and a polymer wall definition layer 140. In the embodiment, the color filter substrate 100 further includes a light-shielding pattern BM, but the invention is not limited thereto. In some embodiments, the color filter substrate 100 is a flexible substrate, but the invention is not limited thereto.
Referring to fig. 1A, a substrate 110 is provided, and a plurality of transparent spacers 120 are formed on the substrate 110. In the present embodiment, the substrate 100 is, for example, a rigid substrate (rigid substrate) or a flexible substrate (flexible substrate). For example, the substrate 100 may be made of glass, plastic, composite material, or other materials that can provide support and can be fabricated into a plate structure. The transparent spacer 120 is made of acrylic resin or other suitable materials.
Next, referring to fig. 1B, a color filter 130 is formed on the substrate 110. The color filter 130 includes, for example, a red filter pattern R, a green filter pattern G, and a blue filter pattern B, wherein a light-shielding pattern BM is preferably disposed between the filter patterns. The color filter element 130 includes a plurality of first through holes O1.
Then, referring to fig. 1C, a first transparent electrode 142, an electrochromic layer 144 and a second transparent electrode 146 are sequentially formed on the color filter element 130.
Referring to fig. 1C and fig. 2A, wherein a section line AA' in fig. 2A corresponds to fig. 1C, and fig. 2A illustrates the first transparent electrode 142 and the transparent spacer 120 and omits to illustrate other components.
In the present embodiment, the first transparent electrode 142 includes a plurality of electrodes 142b and a conductive line 142a connecting the electrodes 142 b. In some embodiments, the electrode 142b covers the color filter element 130, and the wire 142a covers the transparent spacer 120. In some embodiments, the thickness of the portion of the transparent spacer 120 overlapping the conductive line 142a is smaller, so that the conductive line 142a and the electrode 142b can be formed substantially on the same plane, wherein the portion of the transparent spacer 120 with smaller thickness is formed by a half-tone mask (for example, but the invention is not limited thereto). In some embodiments, the conductive lines 142a are formed on other insulating layers instead of the transparent spacers 120, but the invention is not limited thereto.
In some embodiments, the partially transparent spacer 120 is positioned between a plurality of first transparent electrodes 142 separated from each other.
The material of the first transparent electrode 142 is, for example, Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), and tin dioxide (SnO)2) Tin Oxyfluoride (FTO), antimony doped tin oxide (ATO), indium oxide (In)2O3) An organic conductive material (e.g., polyacetylene, polyaniline, polypyrrole, or polythiophene), or other suitable material.
Referring to fig. 1C and fig. 2B, wherein a section line AA' in fig. 2B corresponds to fig. 1C, and fig. 2B illustrates the first transparent electrode 142, the electrochromic layer 144 and the transparent spacer 120 and omits to illustrate other components.
An electrochromic layer 144 is formed on the first transparent electrode 142.
Example of the material of the electrochromic layer 144Such as an electrochromic mixture including an oxidative color-changing material, a reductive color-changing material, a polymeric material (e.g., polymethacrylate or other suitable materials), and a solvent (e.g., propylene carbonate or other suitable solvents). The color-changing material may be an organic material such as Viologen (Viologen), cyclopentadienyl iron (ferrocene), or other suitable material; the inorganic material is, for example, a metal oxide, and specifically may be tungsten trioxide (WO)3) Vanadium pentoxide (V)2O5) Etc., or other suitable materials.
Referring to fig. 1C and fig. 2C, wherein a section line AA' in fig. 2C corresponds to fig. 1C, and fig. 2C illustrates the first transparent electrode 142, the electrochromic layer 144, the transparent spacer 120 and the second transparent electrode 146 and omits to illustrate other components.
In the present embodiment, the second transparent electrode 146 includes a plurality of electrodes 146b and a conductive line 146a connecting the electrodes 146 b. In some embodiments, electrode 146b covers electrochromic layer 144 and conductive line 146a covers transparent spacer 120. In some embodiments, the thickness of the portion of the transparent spacer 120 overlapping the conductive line 146a is smaller, so that the conductive line 146a and the electrode 146b can be formed substantially on the same plane, wherein the portion of the transparent spacer 120 with smaller thickness is formed by a half-tone mask (for example, but the invention is not limited thereto). In some embodiments, the conductive line 146a is formed on other insulating layers instead of the transparent spacer 120, but the invention is not limited thereto.
In some embodiments, partially transparent spacer 120 is positioned between a plurality of second transparent electrodes 146 that are separated from each other.
The material of the second transparent electrode 146 may be the same as or different from the material of the first transparent electrode 142.
The first transparent electrode 142, the electrochromic layer 144, and the second transparent electrode 146 constitute a polymer wall defining layer 140. The polymer wall defining layer 140 includes a plurality of second through holes O2. The second through hole O2 overlaps the first through hole O1 in the direction D1 perpendicular to the substrate 110. The transparent spacer 120 is located in the first through hole O1 and the second through hole O2.
Then, referring to fig. 1D and fig. 2D, the pixel array substrate 300 is covered on the color filter substrate 100, and the display medium material layer 200 is formed between the pixel array substrate 300 and the color filter substrate 100.
The display medium material layer 200 includes a plurality of display media 210 and a plurality of photopolymerizable monomers 220.
The display medium 210 may include liquid crystal molecules, an electrophoretic display medium, or other suitable media.
The photopolymerizable monomer 220 can be polymerized under light irradiation, for example, the photopolymerizable monomer 220 can be polymerized under ultraviolet light irradiation.
In some embodiments, the pixel array substrate 300 includes a substrate, a plurality of data lines DL, a plurality of scan lines GL (or scan lines), and a pixel structure P (as shown in fig. 2D). The scan lines GL and the data lines DL are interlaced with each other. Each pixel structure P is electrically connected to a corresponding one of the scan lines GL and a corresponding one of the data lines DL.
The pixel structure P includes a pixel electrode PE and an active device T. The pixel electrode PE can be a transmissive pixel electrode, a reflective pixel electrode, or a transflective pixel electrode. The material of the transmissive pixel electrode includes metal oxide, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or other suitable oxide, or a stacked layer of at least two of the above. The material of the reflective pixel electrode comprises a metal material with high reflectivity.
The active device T may be a bottom gate thin film transistor or a top gate thin film transistor, which includes a gate, a channel, a source and a drain. The gate electrode is electrically connected to one of the scan lines GL, the source electrode is electrically connected to one of the data lines DL, and the drain electrode is electrically connected to the pixel electrode PE. In some embodiments, the active device T and the pixel electrode PE are electrically connected through other driving devices (not shown), but the invention is not limited thereto. Although the present embodiment is exemplified in that each pixel structure P includes an active device T and a pixel electrode PE, the present invention is not limited thereto.
In some embodiments, the pixel array substrate 300 further includes a common electrode (not shown), and the pixel array substrate 300 may control liquid crystal in a Fringe Field Switching (FFS) mode, an in-plane switching (IPS) mode, or other suitable modes.
Then, referring to fig. 1E, the color filter substrate 100 is irradiated with ultraviolet light UV having a wavelength of 365 nm, and the transmittance of the polymer wall defining layer 140 to the ultraviolet light UV is less than 10%. The ultraviolet light UV passes through the transparent partition 120 and polymerizes the photopolymerizable monomer 220 into a plurality of polymer walls 220'.
The polymer walls 220' are located between the pixel array substrate 300 and the color filter substrate 100. The polymer walls 220' overlap the transparent spacers 120 in a direction D1 perpendicular to the substrate 110. In the present embodiment, the position of the polymer wall 220' generated after the ultraviolet light UV is irradiated corresponds to the position of the transparent partition 120. The polymer walls 220 'and the transparent spacers 120 are made of transparent material and are optically isotropic, so that when the color filter substrate and the pixel array substrate are attached to the polarizer, the incident polarized light passing through the polymer walls 220' and the transparent spacers 120 is blocked by the emergent polarizer, and appears opaque black.
In the present embodiment, the electrochromic layer 144 is transparent when no voltage is applied to the electrochromic layer 144. The electrochromic layer 144 may be activated by either a horizontal electric field or a vertical electric field. When a voltage is applied to the electrochromic layer 144, the electrochromic layer 144 may change color, e.g., turn black, by gaining or losing electrons.
In this embodiment, the property of the electrochromic layer 144 can also be used to drive the electrochromic layer 144 to be black as required to make the dark state of the display panel 10 darker, thereby preventing light from penetrating the display panel in the dark state.
In the embodiment, when the ultraviolet light UV is irradiated, the electrochromic layer 144 is located between the color filter element 130 and the display medium layer 200 ', so that the ultraviolet light UV can be blocked, and the electrochromic layer 144 is directly disposed above the display medium 210, thereby reducing the probability of refraction of the ultraviolet light UV rays through other substances, improving the problem of uneven shape or width of the polymer wall 220 ' caused by the optical path difference, further enhancing the pressing reliability of the display panel, and maintaining the thickness of the display medium layer 200 '. In addition, the deterioration of the display medium 210 in the display medium layer 200' due to the irradiation of ultraviolet light can be prevented.
Based on the above, the display panel 10 and the manufacturing method thereof of the present invention can generate a plurality of polymer walls 220' with the same shape and width after being irradiated with the ultraviolet light UV, thereby solving the problem of color mixing of the display panel 10, improving the problem of aperture ratio reduction, and improving the display quality of the display panel 10.
Fig. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the invention. It should be noted that the embodiment of fig. 3 follows the element numbers and partial contents of the embodiment of fig. 1E, wherein the same or similar element numbers are used to indicate the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.
The main difference between the embodiment of fig. 3 and the embodiment of fig. 1E is that: the first transparent electrode 142 and the second transparent electrode 146 are disposed in different manners.
Referring to fig. 3, the display panel 20 includes a color filter substrate 100, a display medium layer 200', and a pixel array substrate 300. The color filter substrate 100 includes a substrate 110, a plurality of transparent spacers 120, a color filter 130, and a polymer wall definition layer 140.
In the color filter substrate 100 of the present embodiment, the polymer wall definition layer 140 includes a first transparent electrode 142, an electrochromic layer 144, and a second transparent electrode 146 on the color filter 130.
The first and second transparent electrodes 142 and 146 are located between the electrochromic layer 144 and the color filter element 130. The first transparent electrode 142 and the second transparent electrode 146 are separated from each other. That is, the electrochromic layer 144 covers the first transparent electrode 142, the second transparent electrode 146, and the color filter element 130.
The manufacturing method of the display panel 20 is substantially the same as the manufacturing method of the display panel 10, wherein in the manufacturing process of the display panel 20, the first transparent electrode 142 and the second transparent electrode 146 are formed on the color filter 130 and separated from each other, and then the electrochromic layer 144 is formed on the color filter 130.
In the present embodiment, the electrochromic layer 144 is transparent when no voltage is applied to the electrochromic layer 144. When a voltage is applied to the electrochromic layer 144, the electrochromic layer 144 changes color by being able to absorb light in a wider range of wavelengths. For example, the electrochromic layer 144 turns black to serve as a light shielding layer to prevent the display medium 210 from being damaged by the irradiation of ultraviolet light UV, and also to make the dark state of the display panel 20 darker, thereby preventing light from penetrating the display panel in the dark state.
In the embodiment, when the ultraviolet light UV is irradiated, the electrochromic layer 144 is located between the color filter element 130 and the display medium layer 200 ' to serve as an ultraviolet light shielding layer, so that the path through which the light passes can be reduced, and the probability that the light is refracted by passing through other substances can be reduced because the electrochromic layer is directly disposed above the display medium 210, so that the problem of non-uniform shape or width of the polymer wall 220 ' caused by an optical path difference can be solved, the pressing reliability of the display panel can be enhanced, and the thickness of the display medium layer 200 ' can be maintained.
Based on the above, the display panel 20 and the manufacturing method thereof of the present invention can generate a plurality of polymer walls 220' with the same shape and width after the ultraviolet light UV is irradiated, and solve the problem of color mixing of the display panel 20, improve the problem of aperture ratio reduction, and improve the display quality of the display panel 20.
Fig. 4 is a schematic cross-sectional view of a display panel according to another embodiment of the invention. It should be noted that the embodiment of fig. 4 follows the element numbers and partial contents of the embodiment of fig. 1E, wherein the same or similar element numbers are used to indicate the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.
The main difference between the embodiment of fig. 4 and the embodiment of fig. 1E is that: the polymer wall defining layer 140 is replaced with a planarization layer 150.
Referring to fig. 4, the display panel 30 includes a color filter substrate 100, a display medium layer 200', and a pixel array substrate 300. The color filter substrate 100 includes a substrate 110, a plurality of transparent spacers 120, a color filter 130, and a planarization layer 150.
In the color filter substrate 100 of the present embodiment, the planarization layer 150 is located on the color filter 130. The planarization layer 150 is located between the color filter element 130 and the display medium layer 200'. The material of the planarization layer 150 is, for example, acryl or other suitable material that does not allow ultraviolet light UV to penetrate through.
In this embodiment, the planarization layer 150 can serve as an ultraviolet light shielding layer to prevent the display medium 210 from being damaged by ultraviolet light UV during exposure.
The planarization layer 150 includes a plurality of second through holes O2. The second through holes O2 overlap the first through holes O1 in the color filter element 130 in the direction D1 perpendicular to the substrate 110, respectively. The transparent spacer 120 is disposed in the first through hole O1 and the second through hole O2, and the polymer walls 220' and the transparent spacer 120 overlap in a direction D1 perpendicular to the substrate 110.
The manufacturing method of the display panel 30 is substantially the same as the manufacturing method of the display panel 10, wherein in the manufacturing process of the display panel 30, the planarization layer 150 including the plurality of second through holes O2 is formed on the color filter element 130. Next, the pixel array substrate 300 is covered on the planarization layer 150, and a display medium material layer is formed between the pixel array substrate 300 and the planarization layer 150.
In the embodiment, when the ultraviolet light UV is irradiated, the planarization layer 150 is located between the color filter element 130 and the display medium layer 200 ' as the polymer wall defining layer, and the planarization layer 150 is disposed above the display medium 210, so that the probability of light being refracted by other substances can be reduced, and thus the problem of uneven shape or width of the polymer wall 220 ' caused by the optical path difference can be improved, the pressing reliability of the display panel 30 can be enhanced, and the thickness of the display medium layer 200 ' can be maintained.
Based on the above, the display panel 30 and the manufacturing method thereof of the present invention can generate a plurality of polymer walls 220' with the same shape and width after the ultraviolet light UV is irradiated, and solve the problem of color mixing of the display panel 30 and the problem of aperture ratio reduction, thereby improving the display quality of the display panel 30.
Fig. 5 is a schematic cross-sectional view of a display panel according to another embodiment of the invention. It should be noted that the embodiment of fig. 5 follows the element numbers and partial contents of the embodiment of fig. 4, wherein the same or similar elements are denoted by the same or similar reference numbers, and the description of the same technical contents is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.
The main difference between the embodiment of fig. 5 and the embodiment of fig. 4 is that: the transparent spacer 120 in the display panel 40 has a convex arc-shaped top surface.
Referring to fig. 5, the display panel 40 includes a color filter substrate 100, a display medium layer 200', and a pixel array substrate 300. The color filter substrate 100 includes a substrate 110, a plurality of transparent spacers 120, a color filter 130, and a planarization layer 150.
In the color filter substrate 100 of the present embodiment, the transparent spacer 120 has a convex arc top surface facing the pixel array substrate 300, wherein the degree θ of the convex arc top surface is, for example, greater than 60 degrees, but is not limited thereto.
In this embodiment, when the ultraviolet light UV is irradiated, the convex arc top surface of the transparent partition 120 may have a light condensing function, so that the width of the polymer wall 220' generated after the ultraviolet light UV is irradiated is smaller than the width of the transparent partition 120, and the aperture ratio of the display panel is further improved.
The manufacturing method of the display panel 40 is substantially the same as the manufacturing method of the display panel 10, wherein during the manufacturing process of the display panel 40, the transparent spacer 120 has an arc-shaped top surface protruding toward the pixel array substrate 300. The convex arc-shaped top surface of the transparent spacer 120 is manufactured, for example, by a post-exposure baking process.
In the present embodiment, when the ultraviolet light UV is irradiated, the planarization layer 150 is located between the color filter element 130 and the display medium layer 200', so as to improve the optical path difference. In addition, a polymer wall 220' of smaller width can be created by the convex curved top surface of the transparent partition 120.
Based on the above, the display panel 40 and the manufacturing method thereof of the present invention can generate a plurality of polymer walls 220 'with the same shape and width after the ultraviolet light UV is irradiated, and the width of the polymer walls 220' is smaller than the width of the transparent partition 120, so as to solve the color mixing problem of the display panel 40, improve the aperture ratio, and improve the display quality of the display panel 40.
In summary, in the display panel and the manufacturing method thereof of the present invention, the polymer wall defining layer or the flat layer located between the color filter element and the display medium layer is used as the light shielding layer, so that a plurality of polymer walls with the same shape and width can be generated, thereby solving the color mixing problem of the display panel and improving the problem of aperture ratio reduction. In addition, through the transparent isolating piece with the convex arc-shaped top surface, a polymer wall with a width smaller than that of the transparent isolating piece can be produced, and the aperture opening ratio of the display panel is improved.
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (14)
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| TW107126018A TWI691767B (en) | 2018-07-27 | 2018-07-27 | Display panel and manufacturing method thereof |
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| TWI691767B (en) | 2020-04-21 |
| CN109001942A (en) | 2018-12-14 |
| TW202008055A (en) | 2020-02-16 |
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