CN108107627B

CN108107627B - Display panel and optical sheet used therefor

Info

Publication number: CN108107627B
Application number: CN201711314894.1A
Authority: CN
Inventors: 王盛弘; 栾鸿志; 郭廷逸; 蔡璧妃; 杨何源
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2017-10-03
Filing date: 2017-12-12
Publication date: 2020-10-16
Anticipated expiration: 2037-12-12
Also published as: TW201915567A; CN108107627A; TWI630447B

Abstract

The invention provides a display panel and an optical sheet used by the same. The optical sheet comprises a substrate layer, a shading layer, a color filtering structure, a scattering layer and a first reflecting layer. The light-shielding layer is positioned on the base layer and is provided with a plurality of openings. The color filter structure is arranged in at least part of the opening and comprises a plurality of quantum dots. The scattering layer is arranged between the color filter structure and the substrate layer. The first reflecting layer is arranged between the color filter structure and the shading layer. Therefore, the probability of the quantum dots being excited can be improved through the scattering layer and the first reflecting layer, and the light conversion efficiency of the display panel is improved.

Description

Display panel and optical sheet used therefor

Technical Field

The invention relates to a quantum dot display technology, in particular to a display panel and an optical sheet used by the display panel.

Background

Due to its excellent optical properties, quantum dot display (quantum dot display) technology has recently been widely applied to various electronic devices with display screens, such as smart phones, tablet computers, notebook computers, liquid crystal televisions, and the like. For the quantum dot display technology, the display panel is additionally provided with a quantum dot reinforced film with a plurality of color quantum dots between the backlight module and the color filter (QDCF), or the quantum dot color filter replaces the traditional color filter.

For the quantum dot color filter, the color filter structure has quantum dots, and the quantum dots can be excited by the light incident into the color filter structure to emit light of a specific color. However, some of the light incident into the color filter structure cannot be converted effectively, resulting in a poor light utilization efficiency of the display panel.

Disclosure of Invention

In order to solve the problems in the prior art, the present invention provides a display panel and an optical sheet used therein, so as to improve the light conversion efficiency of the display panel.

In one embodiment, an optical sheet includes a base layer, a light shielding layer, a scattering layer, a color filter structure, and a first reflective layer. The light-shielding layer is positioned on the base layer and is provided with a plurality of openings. The color filter structure is arranged in at least part of the opening and comprises a plurality of quantum dots. The scattering layer is located between the color filter structure and the substrate layer. The first reflecting layer is arranged between the color filter structure and the shading layer.

In one embodiment, a display panel includes a first substrate, a second substrate, a display dielectric layer, a plurality of signal lines, a plurality of active devices, a substrate layer, a light-shielding layer, a scattering layer, a color filter structure, a first reflective layer, and a plurality of pixel electrodes. The second substrate is arranged opposite to the first substrate. The display medium layer is positioned between the first substrate and the second substrate. The signal line is located on the first substrate. The active element is positioned on the first substrate and electrically connected with the signal line. The shading layer is positioned on the base layer and is provided with a plurality of openings. The shading layer is at least overlapped with part of the signal lines in a vertical projection direction of the first substrate. The scattering layer is located on the base layer. The color filter structure is provided with a plurality of light conversion patterns, the light conversion patterns are arranged in at least part of the openings, and each light conversion pattern comprises a plurality of quantum dots. The first reflecting layer is arranged between the color filter structure and the shading layer. The pixel electrodes are arranged corresponding to the openings and are electrically connected with the corresponding active elements respectively.

In summary, according to the display panel and the optical sheet used in the display panel of the invention, the light has a longer optical path in the color filter structure through the scattering layer of the light incident surface and the reflective layer between the color filter structure and the light shielding layer, so as to improve the probability of the quantum dots being excited, thereby improving the light conversion efficiency of the display panel. In some embodiments, the scattering layer is formed on the surface of the substrate layer, thereby simplifying the manufacturing process. In some embodiments, the reflective layer between the color filter structure and the light-shielding layer is not disposed at a portion adjacent to the light-emitting surface, so as to prevent the display panel from reflecting due to reflection of the ambient light source.

Drawings

Fig. 1A is a schematic partial top view illustrating an optical sheet according to a first embodiment of the invention.

FIG. 1B is a cross-sectional view of the optical sheet shown in FIG. 1A along the line A-A.

Fig. 2 is a schematic partial cross-sectional view illustrating the optical sheet according to the first embodiment of the invention when being irradiated with light.

Fig. 3A is a schematic partial top view illustrating an optical sheet according to a second embodiment of the invention.

FIG. 3B is a cross-sectional view of the optical sheet shown in FIG. 3A along line B-B.

Fig. 4A is a schematic partial top view illustrating an optical sheet according to a third embodiment of the invention.

FIG. 4B is a cross-sectional view of the optical sheet shown in FIG. 4A along the line C-C.

Fig. 5 is a schematic cross-sectional view illustrating an optical sheet according to a fourth embodiment of the invention.

Fig. 6 is a schematic cross-sectional view illustrating an optical sheet according to a fifth embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view illustrating an optical sheet according to a sixth embodiment of the invention.

Fig. 8 is a schematic cross-sectional view illustrating an optical sheet according to a seventh embodiment of the invention.

Fig. 9 is a schematic cross-sectional view illustrating an optical sheet according to an eighth embodiment of the invention.

Fig. 10 is a schematic cross-sectional view illustrating an optical sheet according to a ninth embodiment of the invention.

Fig. 11 is a schematic cross-sectional view illustrating an optical sheet according to a tenth embodiment of the invention.

Fig. 12 is a schematic cross-sectional view of an optical sheet according to an eleventh embodiment of the invention.

Fig. 13 is a schematic cross-sectional view illustrating an optical sheet according to a twelfth embodiment of the invention.

Fig. 14 is an exploded view of the display panel according to the first embodiment of the invention.

Fig. 15 is a schematic cross-sectional view of the display panel of fig. 14.

Fig. 16 is a schematic cross-sectional view illustrating a display panel according to a second embodiment of the invention.

Fig. 17 is a schematic cross-sectional view illustrating a display panel according to a third embodiment of the invention.

Fig. 18 is a schematic cross-sectional view illustrating a display panel according to a fourth embodiment of the invention.

Fig. 19 is a schematic cross-sectional view illustrating a display panel according to a fifth embodiment of the invention.

Fig. 20 is a schematic cross-sectional view illustrating a display panel according to a sixth embodiment of the invention.

Fig. 21 is a schematic cross-sectional view illustrating a display panel according to a seventh embodiment of the invention.

Description of the symbols:

100. 100A-

100F display panel

10, 10A-10K optical sheet

11 bottom surface of base layer 11s1

11s2 Upper surface 12 light-shielding layer

Lower surface of 121 opening 12s1

12s2 Upper surface 12s3 side wall

13. 13A-13K scattering layer 14 color filter structure

141 photo-conversion pattern 142 quantum dots

14s1 incident surface 14s2 emergent surface

15. 15A-15K first reflective layer 16 second reflective layer

17 rough surface of third reflective layer 171

172 surface 20 first substrate

30 second substrate 40 display medium layer

50 signal line 60 active element

70 pixel electrode 80 backlight module

85 common electrode 90a polarizer

90b polarizer 91 third substrate

92a insulating layer 92b insulating layer

L ray

Detailed Description

Fig. 1A is a schematic partial top view illustrating an optical sheet according to a first embodiment of the invention. FIG. 1B is a cross-sectional view of the optical sheet shown in FIG. 1A along the line A-A.

Referring to fig. 1A to 1B, the optical sheet 10 includes a substrate layer 11, a light shielding layer 12, a scattering layer 13, a color filter structure 14, and a first reflective layer 15.

In the present embodiment, the light-shielding layer 12 is located on the base layer 11, and the light-shielding layer 12 has a plurality of openings 121. The light-shielding layer 12 includes a lower surface 12s1 adjacent to the base layer 11, an upper surface 12s2 opposite to the lower surface 12s1, and a sidewall 12s3 connecting the lower surface 12s1 and the upper surface 12s 2. The light-shielding layer 12 can shield light, and the opening 121 of the light-shielding layer 12 can allow light to pass through.

The color filter structure 14 is disposed in at least a portion of the opening 121, and the color filter structure 14 includes a plurality of quantum dots 142. The quantum dots 142 are not limited to a dot-shaped zero-dimensional structure, and may be a multi-dimensional structure, such as: quantum wires, cones, columns, etc., are referred to herein, for simplicity, as quantum dots 142. The color of the light can be determined by controlling the particle size of the quantum dots 142.

The first reflective layer 15 is disposed between the color filter structure 14 and the light-shielding layer 12. The scattering layer 13 is located on the base layer 11. The surface of the color filter structure 14 adjacent to the substrate layer 11 is a light incident surface 14s1, and the surface of the color filter structure 14 away from the substrate layer 11 is a light emitting surface 14s 2. The scattering layer 13 is located at least between the color filter structure 14 and the base layer 11. In the present embodiment, the scattering layer 13 may be disposed on the light incident surface 14s1 of the color filter structure 14.

In some embodiments, the color filter structure 14 may include a plurality of light conversion patterns 141, and the light conversion patterns 141 are disposed in at least a portion of the openings 121. The colors of the plurality of light conversion patterns 141 may be the same, but not limited thereto; in other embodiments, the colors of the plurality of light conversion patterns 141 may not be the same. In one embodiment, the light conversion patterns 141 are disposed in the openings 121 one by one. The light conversion pattern 141 and the first reflective layer 15 may fill the entire opening 121. The light-shielding layer 12 may surround each of the light conversion patterns 141.

In one embodiment, the optical sheet 10 converts incident light into red light and green light. If the light source is blue light, the light conversion pattern 141 may include a light conversion pattern 141 of red light and a light conversion pattern 141 of green light, and a portion of the openings 121 are not provided with the light conversion pattern 141 but with a light penetration pattern. The light conversion pattern 141 of red light may convert the incident blue light into red light to emit red light. The light conversion pattern 141 of green light may convert incident blue light into green light to emit green light. The light penetrating pattern is used for penetrating the blue light source to emit blue light. In another embodiment, for example, the optical sheet 10 converts incident light into red light, blue light and green light respectively, if the light source is ultraviolet light, the light conversion patterns 141 may include light conversion patterns 141 of red light, light conversion patterns 141 of blue light and light conversion patterns 141 of green light, and are disposed in corresponding one of the openings 121, respectively, the light conversion patterns 141 of red light may convert incident ultraviolet light into red light to emit red light, the light conversion patterns 141 of green light may convert incident ultraviolet light into green light to emit green light, and the light conversion patterns 141 of blue light may convert incident ultraviolet light into blue light to emit blue light. However, the present invention is not limited thereto, and the color and/or the number of the light that can be converted by the light conversion pattern 141 can be adjusted according to the actual application requirement.

As shown in fig. 1B, in the present embodiment, the first reflective layer 15 completely covers the entire sidewall 12s3 of the light shielding layer 12 adjacent to the color filter structure 14. The light-shielding layer 12, the first reflective layer 15 and the light-converting pattern 141 of the color filter structure 14 have a predetermined thickness along a direction perpendicular to the surface of the substrate layer 11. The scattering layer 13 is disposed between the light incident surface 141s1 of the color filter structure 14 and the substrate layer 11. The scattering layer 13 may directly adjoin the color filter structure 14 and the substrate layer 11, but not limited thereto; the scattering layer 13 may not directly adjoin the color filter structure 14 and the base layer 11.

Fig. 2 is a schematic partial cross-sectional view illustrating the optical sheet according to the first embodiment of the invention when being irradiated with light. Referring to fig. 2, in the optical sheet 10 of the present embodiment, when light L is emitted from the other side of the base layer 11 opposite to the color filter structure 14 to the optical sheet 10 and enters the optical sheet 10, the incident light is scattered to the inside of the color filter structure 14 by the scattering layer 13, so as to increase the optical path of the light in the color filter structure 14, and further increase the probability of the quantum dots 142 being excited by the light, thereby increasing the light conversion efficiency. Moreover, when the light in the color filter structure 14 is emitted to the light-shielding layer 12, the light emitted to the light-shielding layer 12 first irradiates the first reflective layer 15 and is reflected back to the interior of the color filter structure 14 by the first reflective layer 15, so as to reduce the absorption of the light by the light-shielding layer 12, further increase the optical path of the light in the color filter structure 14, and further improve the probability of the quantum dot 142 being excited by the light, thereby improving the light conversion efficiency. Similarly, if the light emitted by the quantum dots 142 excited by the light is emitted to the light shielding layer 12, the light can be reflected back to the interior of the color filter structure 14 by the first reflective layer 15 and emitted to the light emitting surface 14s2 of the color filter structure 14 or emitted to the light emitting surface 14s2 of the color filter structure 14 through multiple reflections, so as to reduce the absorption of the light by the light shielding layer 12. Based on the above, the optical sheet 10 of the present embodiment can improve the probability of quantum dots being excited, thereby improving the light conversion efficiency.

Please refer to fig. 3A. Fig. 3A is a schematic partial top view illustrating an optical sheet according to a second embodiment of the invention. FIG. 3B is a cross-sectional view of the optical sheet shown in FIG. 3A along line B-B. The second embodiment shown in fig. 3A and 3B follows the element numbers and partial contents of the first embodiment, wherein the same elements are denoted by the same symbols, 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.

As shown in fig. 3A and 3B, unlike the first embodiment, in the optical sheet 10A of the present embodiment, the scattering layer 13A is disposed between the color filter structure 14 and the base layer 11 and between the light shielding layer 12 and the base layer 11. In one example, the scattering layer 13 may cover the entire surface of the base layer 11 adjacent to the color filter structures 14 and the light-shielding layer 12, i.e., the entire surface of the base layer 11 covers the upper surface 11s 2. Therefore, the optical sheet 10A of the present embodiment can increase the probability of quantum dots being excited, thereby increasing the light conversion efficiency, and can manufacture the scattering layer 13A on the substrate layer 11 by one-step process, thereby appropriately simplifying the manufacturing process of the scattering layer 13A.

The optical sheet of the present invention is not limited to the above-described embodiments. In order to facilitate comparison of differences between the embodiments and simplify descriptions, the same or similar reference numerals are used to identify the same or similar elements in the following embodiments, and descriptions are mainly provided for differences between the embodiments, so that repeated descriptions are omitted.

Please refer to fig. 4A and fig. 4B. Fig. 4A is a schematic partial top view illustrating an optical sheet according to a third embodiment of the invention. FIG. 4B is a cross-sectional view of the optical sheet shown in FIG. 4A along the line C-C. As shown in fig. 4A and 4B, unlike the first embodiment, in the optical sheet 10B of the present embodiment, the first reflective layer 15B is disposed on a part of the side wall 12s3 of the light shielding layer 12. In detail, the first reflective layer 15B is disposed on the sidewall 12s3 adjacent to a portion of the lower surface 12s1, and is not disposed on the sidewall 12s3 adjacent to another portion of the upper surface 12s 2. Therefore, by disposing the first reflective layer 15B on the sidewall 12s3 of the light shielding layer 12 away from the light exit surface 14s2, an ambient light source (e.g., indoor light or outdoor sunlight) will not directly irradiate the first reflective layer 15B, thereby avoiding light reflection.

Please refer to fig. 5. Fig. 5 is a schematic cross-sectional view illustrating an optical sheet according to a fourth embodiment of the invention. As shown in fig. 5, unlike the third embodiment, in the optical sheet 10C of the present embodiment, the scattering layer 13C is disposed between the color filter structure 14 and the base layer 11 and between the light-shielding layer 12 and the base layer 11. In one example, the base layer 11 has an upper surface 11s2 and a lower surface 11s1 on opposite sides, and the scattering layer 13C may cover the entire surface of the base layer 11 adjacent to the color filter structures 14 and the light-shielding layer 12, i.e., the entire surface covers the upper surface 11s2 of the base layer 11. Thus, the scattering layer 13C can be formed on the underlayer 11 at a time, and the manufacturing process of the scattering layer 13 can be appropriately simplified.

Please refer to fig. 6. Fig. 6 is a schematic cross-sectional view illustrating an optical sheet according to a fifth embodiment of the present invention. As shown in fig. 6, unlike the first embodiment, the optical sheet 10D of the present embodiment may further include a second reflective layer 16, and the second reflective layer 16 is located between the light-shielding layer 12 and the base layer 11. In the present embodiment, the second reflective layer 16 is connected to the first reflective layer 15D.

Please refer to fig. 7. Fig. 7 is a schematic cross-sectional view illustrating an optical sheet according to a sixth embodiment of the invention. As shown in fig. 7, unlike the fifth embodiment, in the optical sheet 10E of the present embodiment, the scattering layer 13E is disposed between the color filter structure 14 and the base layer 11 and between the light shielding layer 12 and the base layer 11, and the scattering layer 13E can be formed on the base layer 11 by a one-time process, so that the process of forming the scattering layer 13E can be simplified appropriately.

Please refer to fig. 8. Fig. 8 is a schematic cross-sectional view illustrating an optical sheet according to a seventh embodiment of the invention. As shown in fig. 8, unlike the fifth embodiment, in the optical sheet 10F of the present embodiment, the first reflective layer 15F is provided on part of the side wall 12s3 of the light shielding layer 12. The first reflective layer 15F is disposed on the sidewall 12s3 adjacent to a portion of the lower surface 12s1, and is not disposed on the sidewall 12s3 adjacent to another portion of the upper surface 12s 2. Thereby, the ambient light source does not directly irradiate the first reflective layer 15F, and thus the reflection of light can be avoided.

Please refer to fig. 9. Fig. 9 is a schematic cross-sectional view illustrating an optical sheet according to an eighth embodiment of the invention. As shown in fig. 9, unlike the seventh embodiment, in the optical sheet 10G of the present embodiment, the scattering layer 13G is disposed between the color filter structure 14 and the base layer 11 and between the light shielding layer 12 and the base layer 11, and the scattering layer 13G can be formed on the base layer 11 by a one-time process, so that the process of forming the scattering layer 13G can be simplified appropriately.

Please continue to refer to fig. 6 to fig. 9. In these embodiments, when light irradiates from the substrate layer 11 to the light-shielding layer 12, the light is reflected from the second reflective layer 16 back to the substrate layer 11 without being absorbed by the light-shielding layer 12, and the reflected light can be reflected again by a reflective surface (e.g., a reflective surface in the backlight module or another surface of the substrate layer 11 opposite to the light-shielding layer 12) on the other side of the substrate layer 11 opposite to the light-shielding layer 12, so as to increase the chance that the light enters the color filter structure 14, further improve the utilization rate of the backlight source, and further increase the light conversion efficiency of the display panel 100.

Further, when the scattering layers 13E and 13G are disposed between the light-shielding layer 12 and the base layer 11, the second reflective layer 16 may be disposed on the scattering layers 13E and 13G, that is, between the light-shielding layer 12 and the scattering layers 13E and 13G.

Please refer to fig. 10. Fig. 10 is a schematic cross-sectional view illustrating an optical sheet according to a ninth embodiment of the invention. As shown in fig. 10, unlike the fifth embodiment, the optical sheet 10H of the present embodiment may further include a third reflective layer 17. In this embodiment, the second reflective layer 16 is disposed on the lower surface 12s1 of the light shielding layer 12, and the third reflective layer 17 and the second reflective layer 16 are disposed on two opposite sides of the base layer 11. And the third reflective layer 17 overlaps the light-shielding layer 12 but does not overlap the color filter structure 14 in the vertical projection direction z of the base layer 11.

As shown in fig. 10, in the present embodiment, when the scattering layer 13H is disposed between the color filter structure 14 and the base layer 11 but not between the light-shielding layer 12 and the base layer 11, the surface of the third reflective layer 17 facing the second reflective layer 16 is a rough surface 171. In other words, when there is no scattering layer 13H under the light shielding layer 12, the surface of the third reflective layer 17 adjacent to the second reflective layer 16 is processed into a rough surface 171, so that the light reflected by the second reflective layer 16 at 180 degrees is no longer reflected by the third reflective layer 17 at 180 degrees, and the light reflected by the third reflective layer 17 can enter the color filter structure 14. The third reflective layer 17 may be a patterned metal layer (e.g., copper or aluminum) and the surface thereof is etched to be rough.

Please refer to fig. 11. Fig. 11 is a schematic cross-sectional view illustrating an optical sheet according to a tenth embodiment of the invention. As shown in fig. 11, unlike the ninth embodiment, in the optical sheet 10I of the present embodiment, the scattering layer 13I is disposed between the color filter structure 14 and the base layer 11 and between the light shielding layer 12 and the base layer 11, and the surface 172 of the third reflective layer 17 facing the second reflective layer 16 may be a smooth reflective surface. In other words, when the scattering layer 13I is located below the light-shielding layer 12, the light reflected by the second reflective layer 16 is less likely to be directly reflected to the third reflective layer 17 side by 180 degrees due to scattering by the scattering layer 13I. The surface 172 of the third reflective layer 17 facing the second reflective layer 16 may be a smooth surface. But not limited thereto. In another example, when the scattering layer 13I is disposed between the color filter structure 14 and the substrate layer 11 and between the light-shielding layer 12 and the substrate layer 11, the surface 172 of the third reflective layer 17 facing the second reflective layer 16 may also be rough, so as to increase the reflection angle of the light and increase the chance of the reflected light entering the color filter structure 14.

Please refer to fig. 12. Fig. 12 is a schematic cross-sectional view of an optical sheet according to an eleventh embodiment of the invention. As shown in fig. 12, unlike the ninth embodiment, in the optical sheet 10J of the present embodiment, the first reflective layer 15J is disposed on a portion of the sidewall 12s3 of the light shielding layer 12, so that the ambient light source does not directly irradiate the first reflective layer 15J, thereby avoiding the occurrence of light reflection.

Please refer to fig. 13. Fig. 13 is a schematic cross-sectional view illustrating an optical sheet according to a twelfth embodiment of the invention. As shown in fig. 13, unlike the tenth embodiment, in the optical sheet 10K of the present embodiment, the first reflective layer 15K is disposed on a portion of the sidewall 12s3 of the light shielding layer 12, so that the ambient light source does not directly irradiate the first reflective layer 15K, thereby avoiding the reflection of light.

In some embodiments, the scattering layers 13, 13A-13K may have a plurality of scattering particles, and the scattering particles may be distributed in a single layer or in multiple layers. In some embodiments, the scattering particles may be assembled on the substrate layer 11 by a self-assembly method, or may be formed by directly processing the surface of the substrate layer 11 (or the coating film on the surface of the substrate layer 11) by a surface structure modification method (such as deposition, etching, coating, and/or masking steps), but the manufacturing method is not limited herein. In some embodiments, the material of the scattering particles may be inorganic particles or polymer material. Among them, the inorganic particles may be, for example, titanium dioxide, zinc oxide, etc., but are not limited thereto. In some embodiments, the scattering particles may be circular, rounded, pyramidal, prismatic, or other geometric/non-geometric configurations. In addition, the scattering particles may have a particle size between 20nm and 200 nm.

In some embodiments, the substrate layer 11 is made of a transparent insulating material. The transmittance of light to the substrate layer 11 may be about 60 to 99%, preferably 80 to 99%. In some embodiments, the material of the base layer 11 may be at least one of Poly (methyl methacrylate), PMMA), epoxy resin, Polyethylene terephthalate (PET), and polyvinyl Chloride (PVC), but not limited thereto.

In some embodiments, the light-shielding layer 12 may be a photoresist material, such as a black photoresist, but not limited thereto. In some embodiments, the shape of the opening 121 may be rectangular in a top view, but is not limited thereto. In some embodiments, the openings 121 are arranged in a matrix, but not limited thereto.

In some embodiments, the quantum dots 142 may be single-layer or multi-layer nano-semiconductor materials composed of zinc selenide (ZnSe), cadmium sulfide (CdS), cadmium selenide (CdSe), zinc sulfide (ZnS), and other compounds. When the quantum dots 142 are a multi-layer structure, each layer may be made of the same material or different materials. For example, taking the quantum dot 142 as an inner and outer bilayer structure as an example, the inner layer can be cadmium selenide (CdSe) and the outer layer can be zinc sulfide (ZnS). The above materials are merely examples, and are not limited thereto. For the light conversion patterns 141 of different colors, quantum dots 142 of the same material may be used, or quantum dots 142 of different materials may be used, but not limited thereto.

In some embodiments, the second reflective layer 16 and the first

reflective layers

15, 15A-15K may be the same material or different materials.

In some embodiments, the third reflective layer 17 may be made of the same material as the first

reflective layers

15, 15A-15K and/or the second reflective layer 16, or made of a different material.

In some embodiments, the optical sheet may be applied to a display panel.

Please refer to fig. 14 and fig. 15. Fig. 14 is an exploded view of the display panel according to the first embodiment of the invention. Fig. 15 is a schematic cross-sectional view of the display panel of fig. 14. As shown in fig. 14 and 15, the display panel 100 of the present embodiment includes the optical sheet 10F of the seventh embodiment, a first substrate 20, a second substrate 30, a display medium layer 40, a plurality of signal lines 50, a plurality of active devices 60, and a plurality of pixel electrodes 70. The elements of the optical sheet 10F are already described in the previous paragraphs, and are not repeated herein, and only other elements of the display panel 100 and their corresponding relationship with the elements of the optical sheet 10F will be described below. In addition, for convenience and clarity of the present invention, the active devices of the display panel are not shown in the cross-sectional view.

In this embodiment, the second substrate 30 is disposed opposite to the first substrate 20, and the display medium layer 40 is disposed between the first substrate 20 and the second substrate 30. The first substrate 20 and the second substrate 30 may be rigid substrates or flexible substrates such as glass substrates, quartz substrates, sapphire substrates, plastic substrates, or other suitable substrates. The display medium layer 40 may be a liquid crystal layer, but not limited thereto, for example, the display medium layer 40 may also include other non-self-luminous display medium layers such as an electrophoretic display medium layer, or other suitable non-self-luminous display medium layers such as an organic electroluminescent display medium layer.

The signal line 50 and the active device 60 are disposed on the first substrate 20, and the active device 60 is electrically connected to the signal line 50. The light-shielding layer 12 overlaps at least a part of the signal line 50 in the vertical projection direction z of the first substrate 20. The pixel electrodes 70 are disposed corresponding to the openings 121 and are electrically connected to the corresponding active devices 60, respectively.

The signal lines 50 may include a plurality of data lines and a plurality of scan lines. In the vertical projection direction z of the first substrate 20, the data lines and the scan lines are interlaced to define a plurality of pixel regions. The pixel electrodes 70 are respectively disposed in the corresponding pixel regions.

In the present embodiment, the optical sheet 10F may be disposed on the second substrate 30 (i.e., the opposite substrate) of the display panel 100. In other words, with the display medium layer 40 as a boundary, the second substrate 30, the light shielding layer 12, the color filter structure 14, the first reflective layer 15F, the second reflective layer 16, the scattering layer 13F and the base layer 11 are located above the display medium layer 40 (at the upper part of the display panel 100), and the pixel electrode 70, the signal line 50, the active device 60 and the first substrate 20 are located below the display medium layer 40 (at the lower part of the display panel 100). More specifically, the base layer 11 is disposed between the second substrate 30 and the display medium layer 40. The color filter structure 14 is disposed between the base layer 11 and the second substrate 30, and the display medium layer 40 is located between the pixel electrode 70 and the light conversion pattern 141. The scattering layer 13F is disposed on the light incident surface 14s1 of the color filter structure 14, and the light emitting surface 14s2 of the color filter structure 14 is located between the second substrate 30 and the color filter structure 14.

The display panel of the present invention is not limited to the above embodiments. In order to facilitate comparison of differences between the embodiments and simplify the description, the same or similar reference numerals are used to designate the same or similar components in the embodiments, and the description is mainly directed to differences between the embodiments, and repeated descriptions are omitted.

Please refer to fig. 16. Fig. 16 is a schematic cross-sectional view illustrating a display panel according to a second embodiment of the invention. As shown in fig. 16, a display panel 100A of the present embodiment includes optical sheets 10G of the eighth embodiment, unlike the display panel 100 of the first embodiment. In other words, in the present embodiment, the scattering layer 13G is disposed between the color filter structure 14 and the base layer 11 and between the light shielding layer 12 and the base layer 11.

Please refer to fig. 17. Fig. 17 is a schematic cross-sectional view illustrating a display panel according to a third embodiment of the invention. As shown in fig. 17, a display panel 100B of the present embodiment includes an optical sheet 10J of the eleventh embodiment, unlike the display panel 100 of the first embodiment. In the present embodiment, the optical sheet 10J has the third reflective layer 17, the third reflective layer 17 is disposed on the first substrate 20 (i.e., the array substrate), and the other elements of the optical sheet 10J are disposed on the second substrate 30 (i.e., the opposite substrate). The third reflective layer 17 is correspondingly disposed on the signal line 50. The third reflective layer 17 overlaps the signal line 50 in the perpendicular projection direction z of the first substrate 20. Further, the scattering layer 13J is not provided between the lower surface 12s1 of the light shielding layer 12 and the base layer 11, and the surface of the third reflective layer 17 facing the light shielding layer 12 is the rough surface 171.

Please refer to fig. 18. Fig. 18 is a schematic cross-sectional view illustrating a display panel according to a fourth embodiment of the invention. As shown in fig. 18, a display panel 100C of the present embodiment includes an optical sheet 10K of the twelfth embodiment, unlike the display panel 100 of the first embodiment. In the present embodiment, the optical sheet 10K has the third reflective layer 17, the third reflective layer 17 is disposed on the first substrate 20 (i.e., the array substrate), and the other elements of the optical sheet 10K are disposed on the second substrate 30 (i.e., the opposite substrate). The third reflective layer 17 is correspondingly disposed on the signal line 50. The third reflective layer 17 overlaps the signal line 50 in the perpendicular projection direction z of the first substrate 20. Further, the scattering layer 13K is disposed between the lower surface 12s1 of the light shielding layer 12 and the base layer 11, and the surface of the third reflective layer 17 facing the light shielding layer 12 is a smooth surface 172 (as shown in fig. 18), but not limited thereto, it may be a rough surface.

In some embodiments, the first substrate 20 and the signal line 50 may be covered with an insulating layer 92 a. The pixel electrode 70 and the third reflective layer 17 are on the insulating layer 92 a. In other words, the insulating layer 92a is positioned between the first substrate 20 and the pixel electrode 70 and the third reflective layer 17.

In some embodiments, the

display panels

100, 100A, 100B and 100C may further include a common electrode 85, and the common electrode 85 is disposed between the substrate layer 11 and the display medium layer 40. In addition, one or more other layers, such as a third substrate 91 for disposing the common electrode 85, may be disposed between the common electrode 85 and the base layer 11.

In some embodiments, the backlight module 80 may be disposed on the other side of the first substrate 20 opposite to the display medium layer 40, and the backlight module 80 serves as a light source of the display panel 100 to emit light toward the first substrate 20.

In some embodiments, the

display panels

100, 100A, 100B, and 100C may further include one or more polarizers 90A, 90B. The

polarizers

90a and 90b may be disposed on the first substrate 20 and/or the second substrate 30. When the polarizer 90a is disposed on the second substrate 30, the polarizer 90a is located between the base layer 11 and the third substrate 91. The polarizer 90b is disposed on the first substrate 20, and the polarizer 90b is located on the other side surface of the first substrate 20 opposite to the display medium layer 40, i.e., between the first substrate 20 and the backlight module 80.

Please refer to fig. 19. Fig. 19 is a schematic cross-sectional view illustrating a display panel according to a fifth embodiment of the invention. As shown in fig. 19, unlike the display panel 100 of the first embodiment, the display panel 100D of the present embodiment includes the optical sheet 10C of the fourth embodiment, and the optical sheet 10C may be disposed on the first substrate 20 (i.e., the array substrate) of the display panel 100D. In other words, the second substrate 30 is located on the upper portion of the display panel 100D with the display medium layer 40 as a boundary, and the pixel electrode 70, the light shielding layer 12, the color filter structure 14, the first reflective layer 15C, the scattering layer 13C, the base layer 11, the signal line 50, the active device 60 and the first substrate 20 are located on the lower portion of the display panel 100D. The base layer 11 may be an insulating layer covering the first substrate 20 and the signal lines 50. The color filter structure 14 is disposed on the other side of the base layer 11 opposite to the first substrate 20, and the pixel electrode 70 is located between the display medium layer 40 and the light conversion pattern 141. The light incident surface 14s1 of the color filter structure 14 is located at a side adjacent to the first substrate 20, and the light emitting surface 14s2 of the color filter structure 14 is located at a side away from the first substrate 20 (adjacent to the pixel electrode 70). The scattering layer 13C is disposed on the light incident surface 14s1 of the color filter structure 14. In an example, the pixel electrode 70 and the light conversion pattern 141 may be spaced apart by an insulating layer 92 b. In other words, the insulating layer 92b covers the optical sheet 10C (the light-shielding layer 12 and the color filter structure 14).

Please refer to fig. 20. Fig. 20 is a schematic cross-sectional view illustrating a display panel according to a sixth embodiment of the invention. As shown in fig. 20, a display panel 100E of the present embodiment includes optical sheets 10J of the eleventh embodiment, unlike the display panel 100D of the fifth embodiment. That is, in the present embodiment, the optical sheet 10J has the second reflective layer 16, and the second reflective layer 16 is located between the light shielding layer 12 and the base layer 11. The second reflective layer 16 connects the first reflective layers 15J. In addition, the optical sheet 10 has a third reflective layer 17, and the third reflective layer 17 is disposed between the second reflective layer 16 and the corresponding signal line 50. The base layer 11 covers the first substrate 20 and the third reflective layer 17. The base layer 11 spaces the second reflective layer 16 and the third reflective layer 17. In an exemplary embodiment, the third reflective layer 17 may be directly formed on the upper surface of the signal line 50 (i.e., the surface of the signal line 50 facing the second reflective layer 16). Further, the scattering layer 13J is not provided between the lower surface 12s1 of the light shielding layer 12 and the base layer 11, and the surface of the third reflective layer 17 facing the light shielding layer 12 is the rough surface 171.

Please refer to fig. 21. Fig. 21 is a schematic cross-sectional view illustrating a display panel according to a seventh embodiment of the invention. As shown in fig. 21, a display panel 100F of the present embodiment includes optical sheets 10K of the twelfth embodiment, unlike the display panel 100D of the fifth embodiment. That is, in the present embodiment, the optical sheet 10K has the second reflective layer 16, and the second reflective layer 16 is located between the light shielding layer 12 and the base layer 11. The second reflective layer 16 connects the first reflective layer 15K. In addition, the optical sheet 10K has a third reflective layer 17, and the third reflective layer 17 is disposed between the second reflective layer 16 and the corresponding signal line 50. The base layer 11 covers the first substrate 20 and the third reflective layer 17. The base layer 11 spaces the second reflective layer 16 and the third reflective layer 17. In an exemplary embodiment, the third reflective layer 17 may be directly formed on the upper surface (the surface facing the second reflective layer 16) of the signal line 50. In addition, the scattering layer 13K is disposed between the lower surface 12s1 of the light shielding layer 12 and the base layer 11, and the surface of the third reflective layer 17 facing the light shielding layer 12 is a smooth surface 172 (as shown in fig. 21), but not limited thereto, and may be a rough surface.

In some embodiments, the

display panels

100D, 100E and 100F may further include a common electrode 85, and the common electrode 85 is disposed between the second substrate 30 and the display medium layer 40.

In some embodiments, the backlight module 80 may be disposed on the other side of the first substrate 20 opposite to the display medium layer 40, and the backlight module 80 serves as a light source of the

display panels

100, 100A to 100F to emit light toward the first substrate 20.

In some embodiments, the

display panels

100D, 100E, and 100F may further include one or

more polarizers

90a, 90 b. The

polarizers

90a and 90b are disposed on the first substrate 20 and/or the second substrate 30. When the polarizer 90a is disposed on the second substrate 30, the polarizer 90a is located on the other side surface of the second substrate 30 opposite to the display medium layer 40. The polarizer 90a, the second substrate 30 and the common electrode 85 may be sequentially stacked, and the common electrode 85 is adjacent to the display medium layer 40. The polarizer 90b is disposed on the first substrate 20, and the polarizer 90b is located on the other side surface of the first substrate 20 opposite to the base layer 11, i.e. between the first substrate 20 and the backlight module 80.

It should be noted that although the

display panels

100, 100A to 100F shown in fig. 14 to 21 are illustrated by the

optical sheets

10C, 10F, 10G, 10J and 10K of some embodiments, the invention is not limited thereto, and the

optical sheets

10, 10A, 10B, 10D, 10E, 10H and 10I of other embodiments may also be applied.

Claims

1. An optical sheet, comprising:

a base layer having an upper surface;

a light-shielding layer on the substrate layer, the light-shielding layer having a plurality of openings;

the color filtering structure is arranged in at least part of the opening and comprises a plurality of quantum dots;

the scattering layer is arranged between the color filter structure and the substrate layer, the color filter structure is provided with a light inlet surface and a light outlet surface, the light inlet surface is positioned between the upper surface of the substrate layer and the light outlet surface of the color filter structure, and the scattering layer is arranged on the light inlet surface of the color filter structure;

the first reflecting layer is arranged between the color filter structure and the shading layer; and

a second reflective layer between the light-shielding layer and the upper surface of the substrate layer.

2. The optical sheet according to claim 1, wherein the scattering layer has a plurality of scattering particles.

3. The optical sheet according to claim 1, wherein the light-shielding layer comprises a lower surface adjacent to the base layer, an upper surface opposite to the lower surface of the light-shielding layer, and a sidewall connecting the lower surface of the light-shielding layer and the upper surface of the light-shielding layer, wherein the first reflective layer is disposed on the sidewall adjacent to a portion of the lower surface of the light-shielding layer and is not disposed on the sidewall adjacent to another portion of the upper surface of the light-shielding layer.

4. The optical sheet of claim 1, further comprising:

and the third reflecting layer and the second reflecting layer are respectively arranged at two opposite sides of the substrate layer, wherein the third reflecting layer has a rough surface facing the second reflecting layer, and the third reflecting layer is overlapped with the shading layer in a vertical projection direction of the substrate layer but is not overlapped with the color filter structure.

5. The optical sheet of claim 1, wherein the scattering layer is further disposed between the light-shielding layer and the base layer.

6. The optical sheet according to claim 5, wherein the second reflective layer is located between the light-shielding layer and the scattering layer; and

the optical sheet further comprises a third reflecting layer, wherein the third reflecting layer and the second reflecting layer are respectively arranged on two opposite sides of the substrate layer, and the third reflecting layer is overlapped with the shading layer in a vertical projection direction of the substrate layer but is not overlapped with the color filter structure.

7. The optical sheet according to claim 1, wherein the light-shielding layer has a sidewall, and the first reflective layer is disposed on the sidewall of the light-shielding layer away from the light-emitting surface.

8. A display panel, comprising:

a first substrate;

the second substrate is arranged opposite to the first substrate;

the display medium layer is positioned between the first substrate and the second substrate;

a plurality of signal lines on the first substrate;

a plurality of active elements on the first substrate and electrically connected to the signal lines;

a base layer having an upper surface;

a light-shielding layer located on the base layer, the light-shielding layer having a plurality of openings, wherein the light-shielding layer at least overlaps with a portion of the signal lines in a vertical projection direction of the first substrate;

a color filter structure having a plurality of light conversion patterns disposed in at least a portion of the openings, each of the light conversion patterns including a plurality of quantum dots;

the scattering layer is arranged on the substrate layer, the color filter structure is provided with a light inlet surface and a light outlet surface, the light inlet surface is arranged between the upper surface of the substrate layer and the light outlet surface of the color filter structure, and the scattering layer is arranged on the light inlet surface of the color filter structure;

the first reflecting layer is arranged between the color filter structure and the shading layer;

a second reflective layer between the light-shielding layer and the upper surface of the substrate layer; and

and the pixel electrodes are arranged corresponding to the openings and are respectively and electrically connected with the corresponding active elements.

9. The display panel of claim 8, wherein the base layer is disposed over the signal lines and the active elements, and the pixel electrode is disposed between the light conversion pattern and the display medium layer.

10. The display panel of claim 8, wherein the base layer is disposed between the second substrate and the display medium layer, the light emitting surface is between the second substrate and the color filter structure, and the display medium layer is between the pixel electrode and the light conversion pattern.

11. The display panel according to claim 8, wherein the scattering layer has a plurality of scattering particles.

12. The display panel according to claim 8, wherein the light-shielding layer comprises a lower surface adjacent to the base layer, an upper surface opposite to the lower surface of the light-shielding layer, and a sidewall connecting the lower surface of the light-shielding layer and the upper surface of the light-shielding layer, wherein the first reflective layer is disposed on the sidewall adjacent to a portion of the lower surface of the light-shielding layer and is not disposed on the sidewall adjacent to another portion of the upper surface of the light-shielding layer.

13. The display panel according to claim 8, further comprising:

and a third reflective layer disposed between the second reflective layer and the corresponding signal line, wherein the third reflective layer has a rough surface facing the second reflective layer, and the third reflective layer overlaps with the light-shielding layer but does not overlap with the color filter structure in a vertical projection direction of the substrate layer.

14. The display panel of claim 8, wherein the scattering layer is disposed between the color filter structure and the base layer and between the light-shielding layer and the base layer.

15. The display panel according to claim 14, further comprising: and a third reflective layer disposed between the second reflective layer and the corresponding signal line, wherein the third reflective layer overlaps the light-shielding layer but does not overlap the color filter structure in a vertical projection direction of the substrate layer.

16. The display panel according to claim 14, wherein the light-shielding layer has a sidewall, and the first reflective layer is disposed on the sidewall of the light-shielding layer away from the light-emitting surface.