TWI630447B - Display panel and optical sheet thereof - Google Patents

Abstract

The invention provides a display panel and an optical sheet used by the display panel. The optical sheet includes a base layer, a light shielding layer, a color filter structure, a scattering layer, and a first reflective layer. The light-shielding layer is located on the base layer, and the light-shielding layer has a plurality of openings. The color filter structure is disposed in at least a part of the opening, and the color filter structure includes a plurality of sub-dots. The scattering layer is disposed between the color filter structure and the base layer. The first reflective layer is disposed between the color filter structure and the light-shielding layer. According to this, the probability of the quantum dots being excited can be increased through the scattering layer and the first reflective layer, thereby improving the light conversion efficiency of the display panel.

Description

Display panel and optical sheet used by display panel

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

Quantum dot display technology, due to its good optical properties, has recently been widely used in various electronic devices with display screens, such as smart phones, tablet computers, notebook computers, and LCD TVs. For quantum dot display technology, the display panel is additionally provided with a quantum dot enhanced film with multiple colors of quantum dots between the backlight module and a color dot (quantum dot color filter, QDCF), or a quantum dot color filter Replace traditional color filters.

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

In order to solve the problems faced by conventional technologies, the present invention relates to a display panel and an optical sheet used by the display panel 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 located on the base layer, and the light-shielding layer has a plurality of openings. The color filter structure is disposed in at least a part of the opening, and the color filter structure includes a plurality of sub-dots. The scattering layer is located between the color filter structure and the base layer. The first reflective layer is disposed between the color filter structure and the light-shielding layer.

In one embodiment, a display panel includes a first substrate, a second substrate, a display medium layer, a plurality of signal lines, a plurality of active elements, a base layer, a light shielding layer, a scattering layer, a color filter structure, and a first A reflective layer and a plurality of pixel electrodes. The second substrate is disposed opposite the first substrate. The display medium layer is located between the first substrate and the second substrate. The signal line is located on the first substrate. The active component is located on the first substrate and is electrically connected to the signal line. The light shielding layer is located on the base layer and has a plurality of openings. Wherein, in a vertical projection direction of the first substrate, the light shielding layer overlaps at least part of the signal lines. The scattering layer is located on the base layer. The color filter structure has a plurality of light conversion patterns, the light conversion patterns are disposed in at least a part of the openings, and each light conversion pattern includes a plurality of sub-dots. The first reflective layer is disposed between the color filter structure and the light-shielding layer. The pixel electrodes are disposed corresponding to the openings, and are electrically connected to the corresponding active elements, respectively.

In summary, according to the display panel of the present invention and the optical sheet used by the display panel, the light-transmitting scattering layer and the reflective layer between the color filter structure and the light-shielding layer allow light to have a longer light in the color filter structure. Path to increase the probability of 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 base layer, so that the manufacturing process can be appropriately simplified. In some embodiments, the reflective layer between the color filter structure and the light-shielding layer is not disposed on a portion adjacent to the light-emitting surface, so as to avoid reflection of the display panel due to reflection of ambient light sources.

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

Referring to FIGS. 1A to 1B, the optical sheet 10 includes a base layer 11, a light-shielding layer 12, a scattering layer 13, a color filter structure 14, and a first reflection layer 15.

In this 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 12s2. 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 part of the opening 121, and the color filter structure 14 includes a plurality of sub-dots 142. It should be noted that the quantum dot 142 referred to herein is not limited to a point-like zero-dimensional structure, and may also be a multi-dimensional structure, such as a quantum wire, a quantum cone, a quantum column, etc. As the quantum dot 142. Among them, 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 base layer 11 is a light incident surface 14s1, and the surface of the color filter structure 14 remote from the base layer 11 is a light exit surface 14s2. The scattering layer 13 is at least located between the color filter structure 14 and the base layer 11. In this 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 part of the opening 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 be different. In one embodiment, the light conversion patterns 141 are disposed one-to-one in the opening 121. The light conversion pattern 141 and the first reflection layer 15 may fill the entire opening 121 provided. The light shielding layer 12 may surround each light conversion pattern 141.

In one embodiment, the optical sheet 10 converts incident light into red light and green light as an example. If the light source is blue light, the light conversion pattern 141 may include a red light conversion pattern 141 and a green light conversion pattern 141, and a part of the opening 121 is not provided with the light conversion pattern 141 but a light transmission pattern. The red light conversion pattern 141 can convert incident blue light into red light to emit red light. The green light conversion pattern 141 can convert incident blue light into green light to emit green light. The light transmission pattern allows the blue light source to penetrate and emit blue light. In another embodiment, the optical sheet 10 converts incident light into red light, blue light, and green light as an example. If the light source is ultraviolet light, the light conversion pattern 141 may include red light conversion pattern 141 and blue light. The conversion pattern 141 and the green light conversion pattern 141 are respectively disposed in corresponding openings 121. The red light conversion pattern 141 can convert incident ultraviolet light into red light to emit red and green light. The conversion pattern 141 can convert incident ultraviolet light into green light to emit green light, and the blue light conversion pattern 141 can convert incident ultraviolet light into blue light to emit blue light. However, the present invention is not limited thereto, and the color and / or configuration quantity of light that can be converted by the light conversion pattern 141 can be adjusted according to actual application requirements.

As shown in FIG. 1B, in this embodiment, the first reflective layer 15 completely covers the entire sidewall 12 s 3 of the light shielding layer 12 adjacent to the color filter structure 14. The light conversion pattern 141 of the light shielding layer 12, the first reflection layer 15 and the color filter structure 14 has a predetermined thickness along a direction perpendicular to the surface of the base layer 11. The scattering layer 13 is disposed between the light incident surface 141 s 1 of the color filter structure 14 and the base layer 11. The scattering layer 13 may be directly adjacent to the color filter structure 14 and the base layer 11, but is not limited thereto. The scattering layer 13 may not be directly adjacent to the color filter structure 14 and the base layer 11.

FIG. 2 is a schematic partial cross-sectional view of the optical sheet according to the first embodiment of the present invention when irradiated with light. Please refer to FIG. 2. In the optical sheet 10 of this embodiment, when the light L is incident from the other side of the base layer 11 relative to the color filter structure 14 toward the optical sheet 10 and enters the optical sheet 10, the incident light is transmitted by The scattering layer 13 scatters into the inside of the color filter structure 14, thereby increasing the light path of the light in the color filter structure 14, thereby increasing the probability of the quantum dot 142 being excited by the light, thereby improving light conversion efficiency. In addition, when the light in the color filter structure 14 is directed toward the light-shielding layer 12, the light directed at the light-shielding layer 12 will first strike the first reflection layer 15 and be reflected back to the inside of the color filter structure 14 by the first reflection layer 15. In order to reduce the absorption of light by the light-shielding layer 12, and further increase the light path of the light in the color filter structure 14, the probability of the quantum dot 142 being excited by the light is increased, thereby improving the light conversion efficiency. Similarly, if the light emitted by the quantum dot 142 is excited by the light, it can be reflected by the first reflective layer 15 back to the inside of the color filter structure 14 when it is directed toward the light shielding layer 12, and it can be directed toward the light emitting surface of the color filter structure 14 14s2 or transmitted to the light emitting surface 14s2 of the color filter structure 14 through multiple reflections to reduce light being absorbed by the light shielding layer 12. Based on the above, the optical sheet 10 of this embodiment can increase the probability of the quantum dots being excited, thereby improving the light conversion efficiency.

Please refer to FIG. 3A. 3A is a schematic partial plan view of an optical sheet according to a second embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the optical sheet shown along a line B-B in FIG. 3A. The second embodiment shown in FIGS. 3A and 3B follows the component numbers and parts of the components of the first embodiment, in which the same components are labeled with the same symbols, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments are not repeated.

As shown in FIGS. 3A and 3B, unlike the first embodiment, in the optical sheet 10A of this embodiment, the scattering layer 13A is disposed between the color filter structure 14 and the base layer 11 and the light-shielding layer 12 and the base layer. Between 11. In an exemplary embodiment, the scattering layer 13 may cover the entire surface of the base layer 11 adjacent to the color filter structure 14 and the light-shielding layer 12, that is, the entire surface of the base layer 11 is covered on the upper surface 11 s 2. Therefore, the optical sheet 10A of this embodiment can increase the probability of the quantum dots being excited, thereby improving the light conversion efficiency, and the scattering layer 13A can be fabricated on the base layer 11 through a one-time process, which can further simplify the scattering layer 13A appropriately. Production process.

The optical sheet of the present invention is not limited to the above embodiments. The following will sequentially introduce the optical sheets of other preferred embodiments of the present invention, and in order to facilitate the comparison of the differences between the embodiments and simplify the description, the same or similar reference numerals are used in the following embodiments to indicate the same or similar Components, and mainly describe the differences between the embodiments, and will not repeat the repeated parts.

Please refer to FIG. 4A and FIG. 4B. 4A is a schematic partial plan view of an optical sheet according to a third embodiment of the present invention. FIG. 4B is a schematic cross-sectional view of the optical sheet shown along a line C-C in FIG. 4A. As shown in FIGS. 4A and 4B, unlike the first embodiment, in the optical sheet 10B of this embodiment, a first reflective layer 15B is disposed on a side wall 12 s 3 of a part of the light shielding layer 12. In detail, the first reflective layer 15B is disposed on the side wall 12s3 adjacent to a portion of the lower surface 12s1, and is not disposed on the side wall 12s3 adjacent to another portion of the upper surface 12s2. Therefore, with the above-mentioned configuration of the first reflective layer 15B, which is disposed on the side wall 12s3 of the light-shielding layer 12 away from the light-emitting surface 14s2 portion, the ambient light source (such as indoor light or outdoor sunlight, etc.) will not directly shine on the first The reflective layer 15B can prevent reflections.

Please refer to Figure 5. FIG. 5 is a schematic cross-sectional view of an optical sheet according to a fourth embodiment of the present invention. As shown in FIG. 5, unlike the third embodiment, in the optical sheet 10C of this 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 an exemplary embodiment, the base layer 11 has an upper surface 11s2 and a lower surface 11s1 located on opposite sides, and the scattering layer 13C may cover the entire surface of the base layer 11 adjacent to the color filter structure 14 and the light-shielding layer 12, that is, the entire surface The upper surface 11s2 of the base layer 11. Thereby, the scattering layer 13C can be manufactured on the base layer 11 at one time, and the manufacturing process of the scattering layer 13 can be simplified appropriately.

Please refer to Figure 6. FIG. 6 is a schematic cross-sectional view of 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 this 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 this embodiment, the second reflective layer 16 is connected to the first reflective layer 15D.

Please refer to Figure 7. FIG. 7 is a schematic cross-sectional view of an optical sheet according to a sixth embodiment of the present invention. As shown in FIG. 7, unlike the fifth embodiment, in the optical sheet 10E of this 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. The scattering layer 13E can be manufactured on the base layer 11 through a one-time process, so that the manufacturing process of the scattering layer 13E can be appropriately simplified.

Please refer to Figure 8. FIG. 8 is a schematic cross-sectional view of an optical sheet according to a seventh embodiment of the present invention. As shown in FIG. 8, unlike the fifth embodiment, in the optical sheet 10F of this embodiment, a first reflective layer 15F is disposed on a side wall 12 s 3 of a part of the light shielding layer 12. The first reflective layer 15F is disposed on the side wall 12s3 adjacent to a portion of the lower surface 12s1, and is not disposed on the side wall 12s3 adjacent to another portion of the upper surface 12s2. Thereby, the ambient light source does not directly irradiate the first reflective layer 15F, and thus the situation of light reflection can be avoided.

Please refer to Figure 9. FIG. 9 is a schematic cross-sectional view of an optical sheet according to an eighth embodiment of the present invention. As shown in FIG. 9, unlike the seventh embodiment, in the optical sheet 10G of this 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. The scattering layer 13G can be manufactured on the base layer 11 through a one-time process, which can further simplify the manufacturing process of the scattering layer 13G.

Please continue to refer to FIGS. 6 to 9. In these embodiments, when light is irradiated from the base layer 11 to the light shielding layer 12, the light is reflected from the second reflective layer 16 back to the base layer 11 without being absorbed by the light shielding layer 12, and the reflected light can be located on the substrate The reflective surface of layer 11 opposite to the light-shielding layer 12 (eg, the reflective surface in the backlight module or the surface of the base layer 11 opposite to the light-shielding layer 12) is reflected again, thereby increasing the incidence of light incident on the color filter structure 14. Opportunities, and further improve the utilization of the backlight source, thereby increasing the light conversion efficiency of the display panel 100.

In addition, 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 located 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 Figure 10. FIG. 10 is a schematic cross-sectional view of an optical sheet according to a ninth embodiment of the present invention. As shown in FIG. 10, unlike the fifth embodiment, the optical sheet 10H of this embodiment may further include a third reflective layer 17. In this embodiment, a 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 opposite sides of the base layer 11, respectively. In the vertical projection direction z of the base layer 11, the third reflective layer 17 overlaps the light-shielding layer 12, but does not overlap the color filter structure 14.

As shown in FIG. 10, in this embodiment, when the scattering layer 13H is disposed between the color filter structure 14 and the base layer 11 and is not disposed between the light shielding layer 12 and the base layer 11, the third reflective layer 17 faces The surface of 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 surface-processed into a rough surface 171, so that the second reflective layer 16 can reflect light at 180 degrees It is no longer reflected by the third reflective layer 17 at 180 degrees, but provides an opportunity for the light reflected by the third reflective layer 17 to be incident on the color filter structure 14. Wherein, the third reflective layer 17 may be a patterned metal layer (eg, copper or aluminum) and its surface is roughened by etching.

Please refer to Figure 11. FIG. 11 is a schematic cross-sectional view of an optical sheet according to a tenth embodiment of the present invention. As shown in FIG. 11, unlike the ninth embodiment, in the optical sheet 10I of this 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. 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 there is a scattering layer 13I under the light-shielding layer 12, the light reflected by the second reflection layer 16 is less likely to be directly reflected to the third reflection layer 17 side by 180 degrees because it is scattered by the scattering layer 13I. Therefore, the surface 172 of the third reflective layer 17 facing the second reflective layer 16 may be a smooth surface. But not limited to this. In another exemplary embodiment, when 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, the third reflective layer 17 faces the surface 172 of the second reflective layer 16. It can also be rough, so as to increase the reflection angle of the light to increase the chance of the reflected light entering the color filter structure 14.

Please refer to Figure 12. FIG. 12 is a schematic cross-sectional view of an optical sheet according to an eleventh embodiment of the present 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 side wall 12s 3 of a part of the light shielding layer 12, whereby the ambient light source is not directly irradiated The first reflective layer 15J can avoid reflections.

Please refer to Figure 13. 13 is a schematic cross-sectional view of an optical sheet according to a twelfth embodiment of the present invention. As shown in FIG. 13, unlike the tenth embodiment, in the optical sheet 10K of this embodiment, the first reflective layer 15K is disposed on the side wall 12s3 of a part of the light-shielding layer 12, so that the ambient light source does not directly shine on The first reflective layer 15K can avoid reflections.

In some embodiments, the aforementioned scattering layers 13, 13A-13K may have a plurality of scattering particles, and these scattering particles may be distributed in a single layer or a plurality of layers. In some embodiments, the scattering particles can be assembled on the base layer 11 by a self-assembly method, or can be directly applied to the substrate by a surface structure modification method (such as deposition, etching, coating, and / or photomask steps, etc.). The surface of the layer 11 (or the plating film on the surface of the base layer 11) is formed by processing, but the manufacturing method is not limited here. In some embodiments, the material of the scattering particles may be inorganic particles or polymer materials. Among them, the inorganic particles may be, for example, titanium dioxide, zinc oxide, and the like, but are not limited thereto. In some embodiments, the scattering particles can be circular, arc-shaped, cone-shaped, prismatic, or other geometric / non-geometric configurations. In addition, the particle diameter of the scattering particles may be between 20 nm and 200 nm.

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

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

In some embodiments, the aforementioned quantum dots 142 may be single-layered or multi-layered nanometers composed of compounds such as zinc selenide (ZnSe), cadmium sulfide (CdS), cadmium selenide (CdSe), and zinc sulfide (ZnS). semiconductors. In addition, when the quantum dot 142 has a multilayer structure, each layer may be the same material or different materials. For example, taking the structure of the quantum dot 142 as an inner and outer double layer as an example, the inner layer may be cadmium selenide (CdSe), and the outer layer may be zinc sulfide (ZnS). In addition, the above materials are merely examples, and are not limited thereto. In addition, for the light conversion patterns 141 of different colors, the quantum dots 142 of the same material may be used, or the quantum dots 142 of different materials may be used, which is not limited thereto.

In some embodiments, the aforementioned second reflective layer 16 and the first reflective layers 15 and 15A-15K may be made of the same material or different materials.

In some embodiments, the aforementioned third reflective layer 17 may be the same material as the first reflective layer 15, 15A-15K and / or the second reflective layer 16, or may be a different material.

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

Please refer to FIG. 14 and FIG. 15. FIG. 14 is an exploded view of a display panel according to the first embodiment of the present invention. FIG. 15 is a schematic cross-sectional view of the display panel of FIG. 14. As shown in FIG. 14 and FIG. 15, the display panel 100 of this embodiment includes an optical sheet 10F, a first substrate 20, a second substrate 30, a display medium layer 40, a plurality of signal lines 50, and a plurality of active devices of the seventh embodiment. Element 60 and a plurality of pixel electrodes 70. Among them, the components of the optical sheet 10F have been described in the previous paragraphs, and will not be repeated here. The following describes only the other components of the display panel 100 and their corresponding relationships with the components of the optical sheet 10F. In addition, for convenience and clarity of presenting the present invention, the active elements 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 located 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 is not limited thereto. For example, the display medium layer 40 may also include other non-self-luminous display medium layers such as electrophoretic display medium layers, or other suitable non-self-luminous display medium layers For example, an organic electroluminescent display medium layer.

The signal line 50 and the active device 60 are located on the first substrate 20, and the active device 60 is electrically connected to the signal line 50. In the vertical projection direction z of the first substrate 20, the light shielding layer 12 overlaps at least part of the signal lines 50. The pixel electrode 70 is disposed corresponding to the opening 121 and is electrically connected to the corresponding active device 60 respectively.

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

In this embodiment, the optical sheet 10F may be disposed on the second substrate 30 (that is, 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 on the display medium layer 40. 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 (the lower portion 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 exit 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. The following will sequentially introduce display panels of other preferred embodiments of the present invention, and in order to facilitate the comparison of the differences between the embodiments and simplify the description, the same or similar reference numerals are used in the following embodiments to indicate the same or similar Components, and mainly describe the differences between the embodiments, and will not repeat the repeated parts.

Please refer to Figure 16. 16 is a schematic cross-sectional view of a display panel according to a second embodiment of the present invention. As shown in FIG. 16, unlike the display panel 100 of the first embodiment, the display panel 100A of this embodiment includes an optical sheet 10G of the eighth embodiment. In other words, in this 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 Figure 17. 17 is a schematic cross-sectional view of a display panel according to a third embodiment of the present invention. As shown in FIG. 17, unlike the display panel 100 of the first embodiment, the display panel 100B of this embodiment includes an optical sheet 10J of the eleventh embodiment. In this embodiment, the optical sheet 10J has a third reflective layer 17, and the third reflective layer 17 is disposed on the first substrate 20 (ie, the array substrate), and other elements of the optical sheet 10J are disposed on the second substrate 30 (ie Opposite substrate). The third reflective layer 17 is correspondingly disposed on the signal line 50. In the vertical projection direction z of the first substrate 20, the third reflective layer 17 overlaps the signal line 50. In addition, 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 a rough surface 171.

Please refer to Figure 18. 18 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present invention. As shown in FIG. 18, unlike the display panel 100 of the first embodiment, the display panel 100C of this embodiment includes the optical sheet 10K of the twelfth embodiment. In this embodiment, the optical sheet 10K has a third reflective layer 17, and the third reflective layer 17 is disposed on the first substrate 20 (that is, the array substrate), and other elements of the optical sheet 10K are disposed on the second substrate 30 (that is, To the substrate). The third reflective layer 17 is correspondingly disposed on the signal line 50. In the vertical projection direction z of the first substrate 20, the third reflective layer 17 overlaps the signal line 50. In addition, a scattering layer 13K is 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 a smooth surface 172 (as shown in FIG. 18), but this is not the case. As a limitation, it can also be a rough surface.

In some embodiments, the first substrate 20 and the signal line 50 may be covered with an insulating layer 92a. The pixel electrode 70 and the third reflective layer 17 are located on the insulating layer 92a. In other words, the insulating layer 92 a is located 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 base layer 11 and the display medium layer 40. In addition, there may be one or more other film layers between the common electrode 85 and the base layer 11, such as a third substrate 91 for providing the common electrode 85 and the like.

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

Please refer to Figure 19. 19 is a schematic cross-sectional view of a display panel according to a fifth embodiment of the present invention. As shown in FIG. 19, unlike the display panel 100 of the first embodiment, the display panel 100D of this embodiment includes the optical sheet 10C of the fourth embodiment, and the optical sheet 10C may be disposed on the first substrate 20 of the display panel 100D ( Ie array substrate). In other words, with the display medium layer 40 as a boundary, the second substrate 30 is located above the display panel 100D, and the pixel electrode 70, the light shielding layer 12, the color filter structure 14, the first reflective layer 15C, the scattering layer 13C, and the base layer 11 The signal line 50, the active device 60 and the first substrate 20 are located below the display panel 100D. The base layer 11 may be an insulating layer covering the first substrate 20 and the signal line 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 on a side adjacent to the first substrate 20, and the light emitting surface 14s2 of the color filter structure 14 is located on a side remote 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 exemplary embodiment, the pixel electrode 70 and the light conversion pattern 141 may be separated by an insulating layer 92b. 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 Figure 20. 20 is a schematic cross-sectional view of a display panel according to a sixth embodiment of the present invention. As shown in FIG. 20, unlike the display panel 100D of the fifth embodiment, the display panel 100E of this embodiment includes an optical sheet 10J of the eleventh embodiment. That is, in this 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 is connected to the first reflective layer 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 is spaced from 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 (that is, the surface of the signal line 50 facing the second reflective layer 16). In addition, 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 a rough surface 171.

Please refer to Figure 21. 21 is a schematic cross-sectional view of a display panel according to a seventh embodiment of the present invention. As shown in FIG. 21, unlike the display panel 100D of the fifth embodiment, the display panel 100F of this embodiment includes the optical sheet 10K of the twelfth embodiment. That is, in this 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 is connected to 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 is spaced from 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 (the surface facing the second reflective layer 16). In addition, a scattering layer 13K is 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 a smooth surface 172 (as shown in FIG. 21), but this is not the case. As a limitation, it can also 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 and 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 polarizing plates 90a, 90b. The polarizing plates 90 a and 90 b are disposed on the first substrate 20 and / or on the second substrate 30. When the polarizer 90 a is disposed on the second substrate 30, the polarizer 90 a is located on the other surface of the second substrate 30 opposite to the display medium layer 40. The polarizer 90 a, 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 90 b is disposed on the first substrate 20. The polarizer 90 b is located on the other surface of the first substrate 20 relative to the base layer 11, that is, between the first substrate 20 and the backlight module 80.

It should be noted that although the display panels 100 and 100A to 100F shown in FIGS. 14 to 21 are schematic diagrams of the optical sheets 10C, 10F, 10G, 10J, and 10K of the foregoing partial embodiments, the present invention is not limited thereto. The optical sheets 10, 10A, 10B, 10D, 10E, 10H, and 10I of other embodiments can also be applied.

In summary, according to the display panel of the present invention and the optical sheet used by the display panel, the light-transmitting scattering layer and the reflective layer between the color filter structure and the light-shielding layer allow light to have a longer light in the color filter structure. Path to increase the probability of 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 base layer, so that the manufacturing process can be appropriately simplified. In some embodiments, the reflective layer between the color filter structure and the light-shielding layer is not disposed on a portion adjacent to the light-emitting surface, so as to avoid reflection of the display panel due to reflection of ambient light sources.

100, 100A-100F‧‧‧ display panel

10, 10A-10K‧‧‧Optical sheet

11‧‧‧ basal layer

11s1‧‧‧ lower surface

11s2‧‧‧upper surface

12‧‧‧ shading layer

121‧‧‧ opening

12s1‧‧‧ lower surface

12s2‧‧‧upper surface

12s3‧‧‧ sidewall

13, 13A-13K‧‧‧Scattering layer

14‧‧‧color filter structure

141‧‧‧light conversion pattern

142‧‧‧ Quantum Dots

14s1‧‧‧Incoming surface

14s2‧‧‧ smooth surface

15, 15A-15K‧‧‧First reflective layer

16‧‧‧Second reflective layer

17‧‧‧ third reflective layer

171‧‧‧ rough surface

172‧‧‧ surface

20‧‧‧ the first substrate

30‧‧‧second substrate

40‧‧‧Display media layer

50‧‧‧ signal line

60‧‧‧Active components

70‧‧‧pixel electrode

80‧‧‧ backlight module

85‧‧‧Common electrode

90a‧‧‧Polarizer

90b‧‧‧Polarizer

91‧‧‧ Third substrate

92a‧‧‧ Insulation

92b‧‧‧ insulation

L‧‧‧light

FIG. 1A is a schematic partial plan view of an optical sheet according to a first embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of the optical sheet shown along a line A-A in FIG. 1A. FIG. 2 is a schematic partial cross-sectional view of the optical sheet according to the first embodiment of the present invention when irradiated with light. 3A is a schematic partial plan view of an optical sheet according to a second embodiment of the present invention. FIG. 3B is a schematic cross-sectional view of the optical sheet shown along a line B-B in FIG. 3A. 4A is a schematic partial plan view of an optical sheet according to a third embodiment of the present invention. FIG. 4B is a schematic cross-sectional view of the optical sheet shown along a line C-C in FIG. 4A. FIG. 5 is a schematic cross-sectional view of an optical sheet according to a fourth embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of an optical sheet according to a fifth embodiment of the present invention. FIG. 7 is a schematic cross-sectional view of an optical sheet according to a sixth embodiment of the present invention. FIG. 8 is a schematic cross-sectional view of an optical sheet according to a seventh embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of an optical sheet according to an eighth embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of an optical sheet according to a ninth embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of an optical sheet according to a tenth embodiment of the present invention. FIG. 12 is a schematic cross-sectional view of an optical sheet according to an eleventh embodiment of the present invention. 13 is a schematic cross-sectional view of an optical sheet according to a twelfth embodiment of the present invention. FIG. 14 is an exploded view of a display panel according to the first embodiment of the present invention. FIG. 15 is a schematic cross-sectional view of the display panel of FIG. 14. 16 is a schematic cross-sectional view of a display panel according to a second embodiment of the present invention. 17 is a schematic cross-sectional view of a display panel according to a third embodiment of the present invention. 18 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present invention. 19 is a schematic cross-sectional view of a display panel according to a fifth embodiment of the present invention. 20 is a schematic cross-sectional view of a display panel according to a sixth embodiment of the present invention. 21 is a schematic cross-sectional view of a display panel according to a seventh embodiment of the present invention.

Claims (18)

An optical sheet includes: a base layer; a light-shielding layer on the base layer, the light-shielding layer having a plurality of openings; a color filter structure disposed in at least part of the openings, the color filter structure Including a plurality of sub-dots; a scattering layer disposed between the color filter structure and the base layer, wherein the color filter structure has a light entrance surface and a light exit surface, and the scattering layer is disposed on the color filter structure The light incident surface; and a first reflective layer disposed between the color filter structure and the light shielding layer. The optical sheet according to claim 1, wherein the scattering layer has a plurality of scattering particles. The optical sheet according to claim 1, wherein the light shielding layer includes a lower surface adjacent to the base layer, an upper surface opposite to the lower surface, and a sidewall connecting the lower surface and the upper surface, wherein the first The reflective layer is disposed on the side wall adjacent to a portion of the lower surface, and is not disposed on the side wall adjacent to another portion of the upper surface. The optical sheet according to claim 1, further comprising a second reflective layer between the light shielding layer and the base layer. The optical sheet according to claim 4, further comprising: a third reflective layer and the second reflective layer respectively disposed on opposite sides of the base layer, wherein the third reflective layer has a The surface is rough, and the third reflective layer overlaps the light shielding layer in a vertical projection direction of the base layer, but does not overlap the color filter structure. The optical sheet according to claim 1, wherein the scattering layer is further disposed between the light shielding layer and the base layer. The optical sheet according to claim 6, further comprising: a second reflective layer between the light shielding layer and the scattering layer; and a third reflective layer, wherein the third reflective layer and the second reflective layer are respectively The third reflective layer is disposed on opposite sides of the base layer and overlaps the light shielding layer in a vertical projection direction of the base layer, but does not overlap the color filter structure. 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 portion. A display panel includes: a first substrate; a second substrate opposite to the first substrate; a display medium layer located between the first substrate and the second substrate; and a plurality of signal lines located on the first substrate On a substrate; a plurality of active elements located on the first substrate and electrically connected to the signal lines; a base layer; a light-shielding layer located on the base layer, the light-shielding layer having a plurality of openings Wherein, in a vertical projection direction of the first substrate, the light-shielding layer overlaps at least part of the signal lines; a scattering layer is located on the base layer; a color filter structure, the color filter structure has A plurality of light conversion patterns, the light conversion patterns are disposed in at least part of the openings, and each of the light conversion patterns includes a plurality of sub-dots, wherein the color filter structure has a light incident surface and a light outgoing surface, and the scattering A layer is disposed on the light incident surface of the color filter structure; a first reflection layer is disposed between the color filter structure and the light shielding layer; and a plurality of pixel electrodes are disposed corresponding to the openings, Corresponding to and connected to the electrically active elements. The display panel according to claim 9, wherein the base layer is disposed on the signal lines and the active devices, and the pixel electrodes are disposed between the light conversion patterns and the display medium layer. The display panel according to claim 9, wherein the base layer is disposed between the second substrate and the display medium layer, the light emitting surface is located between the second substrate and the color filter structure, and the display medium layer Located between the pixel electrodes and the light conversion patterns. The display panel according to claim 9, wherein the scattering layer has a plurality of scattering particles. The display panel according to claim 9, wherein the light-shielding layer includes a lower surface adjacent to the base layer, an upper surface opposite to the lower surface, and a sidewall connecting the lower surface and the upper surface, wherein the first The reflective layer is disposed on the side wall adjacent to a portion of the lower surface, and is not disposed on the side wall adjacent to another portion of the upper surface. The display panel according to claim 9, further comprising a second reflective layer between the light shielding layer and the base layer. The display panel according to claim 14, further comprising: a third reflective layer disposed between the second reflective layer and the corresponding signal line, wherein the third reflective layer has a roughness toward the second reflective layer. Surface, and the third reflective layer overlaps the light shielding layer in a vertical projection direction of the base layer, but does not overlap the color filter structure. The display panel according to claim 9, 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. The display panel according to claim 16, further comprising: a second reflective layer between the light shielding layer and the base layer; and a third reflective layer disposed on the second reflective layer and the corresponding signal line In between, the third reflective layer overlaps the light shielding layer in a vertical projection direction of the base layer, but does not overlap the color filter structure. The display panel according to claim 9, 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 portion.