TWI771912B - Display device - Google Patents

Abstract

A display device includes a substrate, a material layer, a plurality of isolation walls and a plurality of light-emitting elements. The substrate has a plurality of pixel areas and a circuit area between the pixel areas. The material layer is disposed on the substrate. The isolation wall is disposed on the substrate and embedded in the material layer. Each isolation wall surrounds the corresponding pixel area, and each isolation wall is a discontinuous wall. The light-emitting element is disposed on the material layer. Each light-emitting element is located in a corresponding pixel area. Each light-emitting element has a first conductive wire and a second conductive wire. At least one of the first conductive wire and the second conductive wire of each light-emitting element extends to the circuit area through a gate of the corresponding isolation wall.

Description

display device

The present invention relates to a display device, and more particularly, to a display device having a partition wall.

A light-emitting element array display device is composed of a plurality of light-emitting elements arranged on a substrate and arranged in an array. Inheriting the characteristics of the current light-emitting elements, the light-emitting element array display device has the advantages of power saving, high efficiency, high brightness and fast response time. The light-emitting element array display device is divided into an upper light emitting type that emits light away from the substrate and a lower light emitting type that emits light toward the substrate. Among them, the light emitting efficiency of the lower light emitting type is better, and the field pattern of the light emitting is relatively uniform. However, the downward light emitting type display device has the problem that the light rays of adjacent pixel regions interfere with each other, which leads to the degradation of the display quality.

The present invention provides a display device which can improve the phenomenon that the light rays of adjacent pixel regions interfere with each other.

The display device of the present invention includes a substrate, a material layer, a plurality of partition walls and a plurality of light-emitting elements. The substrate has a plurality of pixel regions and a plurality of pixel regions located between the pixel regions a circuit area. The material layer is disposed on the substrate. The isolation wall is disposed on the substrate and embedded in the material layer. Each partition wall surrounds the corresponding pixel area, and each partition wall is a discontinuous wall. The light-emitting element is arranged on the material layer. Each light-emitting element is located in the corresponding pixel area. Each light-emitting element has a first wire and a second wire. At least one of the first wire and the second wire of each light-emitting element extends from a break in the corresponding partition wall to the circuit area.

In an embodiment of the present invention, the top of the isolation wall is exposed outside the material layer, and the bottom of the isolation wall is in contact with the substrate.

In an embodiment of the present invention, each breach includes a first breach and a second breach. Each of the first wires extends from the corresponding first breach of the partition wall to the circuit area. Each of the second wires extends from the corresponding second opening of the partition wall to the circuit area.

In an embodiment of the present invention, when viewed along a normal direction of the substrate, the edge of the side of each partition wall close to the corresponding light-emitting element is arc-shaped.

In an embodiment of the present invention, when viewed along a direction perpendicular to a normal direction of the substrate, the cross-section of each partition wall is arc-shaped at the edge of the side close to the corresponding light-emitting element.

In an embodiment of the present invention, each pixel area has a plurality of light-emitting elements. The first wire structures of the light emitting elements in the same pixel area are connected to each other, and the second wire structures of the light emitting elements in the same pixel area are connected to each other.

In one embodiment of the invention, the material layer is a stacked layer. Viewed from a direction perpendicular to a normal direction of the substrate, the edges on both sides of the section of each partition wall are stepped, and the wall thickness of each partition wall increases from the bottom of each partition wall upward.

In an embodiment of the present invention, the light emitting element is a light emitting diode.

In an embodiment of the present invention, the material of the partition wall is a polymer material.

In an embodiment of the present invention, the display device further includes a reflective material layer disposed on the substrate and covering the material layer, the isolation wall and the light-emitting element.

In an embodiment of the present invention, the material of the reflective material layer is the same as that of the isolation wall.

In an embodiment of the present invention, at least a part of the isolation wall is also embedded in the substrate.

Based on the above, in the display device of the present invention, the partition wall surrounds the pixel area, which can prevent light from entering the adjacent pixel area, thereby improving the display quality.

100, 200, 300, 400, 500, 600, 700, 800, 900: Display devices

110,510: Substrate

120,420: Material Layer

130, 132, 330, 530, 630, 830, 930: partition walls

130T, 132T: top

130B, 132B, 430B: Bottom

140: Light-emitting element

142,642,742: First wire

144,644,744: Second wire

150: Reflective material layer

P10: pixel area

C10: Circuit area

G12, G14, G62: break

S12: light-emitting surface

VSS: common circuit

TFT: driver circuit

D12, D14: Direction

W12, W14, W16: width

332,432,833: Edge

422: Layer

FIG. 1 is a schematic top view of a display device according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional schematic diagram of the display device of FIG. 1 taken along the line I-I.

3 to 7 are partial cross-sectional schematic views of display devices according to another five embodiments of the present invention.

8 to 11 are schematic partial top views of display devices according to other four embodiments of the present invention.

FIG. 1 is a schematic top view of a display device according to an embodiment of the present invention picture. FIG. 2 is a partial cross-sectional schematic diagram of the display device of FIG. 1 taken along the line I-I. Referring to FIGS. 1 and 2 , the display device 100 of this embodiment includes a substrate 110 , a material layer 120 , a plurality of isolation walls 130 and a plurality of light-emitting elements 140 . The substrate 110 has a plurality of pixel regions P10 and a circuit region C10 between the pixel regions P10. The material layer 120 is disposed on the substrate 110 . The isolation wall 130 is disposed on the substrate 110 and embedded in the material layer 120 . In other words, it can be seen from the cross-sectional view of FIG. 2 that the partition wall 130 passes through the material layer 120 . Each partition wall 130 surrounds the corresponding pixel region P10 , and each partition wall 130 is a discontinuous wall. In other words, it can be seen from the top view of FIG. 1 that each partition wall 130 is roughly located around a corresponding pixel region P10, but the partition wall 130 does not surround the entire pixel region P10, but presents a discontinuous appearance .

The light-emitting element 140 is disposed on the material layer 120 . Each light-emitting element 140 is located in the corresponding pixel region P10. Each light-emitting element 140 has a first wire 142 and a second wire 144 . The first wire 142 and the second wire 144 extend from a corresponding opening of the partition wall 130 (including the first opening G12 and the second opening G14 ) to the circuit region C10 . The breaches (including the first breach G12 and the second breach G14 ) are the discontinuities of the partition wall 130 seen from the top view of FIG. 1 .

In the display device 100 of the present embodiment, since the periphery of the pixel region P10 is substantially surrounded by the partition wall 130 , the light emitted from the light emitting elements 140 in one pixel region P10 toward the substrate 110 (toward the light emitting surface of the substrate 110 ) S12 light-emitting) will not enter into other adjacent pixel areas P10, and the light emitted by the light emitting elements 140 of other adjacent pixel areas P10 will not enter into this pixel area P10. In this way, a good display quality can be obtained. In addition, the partition wall 130 has a first breach The first wire 142 and the second wire 144 can pass through the G12 and the second opening G14, so the first wire 142 and the second wire 144 can be connected to the common circuit VSS and the driving circuit TFT in the circuit region C10. In this way, the light extraction rate can be improved without arranging circuits in the pixel region P10.

In this embodiment, the tops 130T of the isolation walls 130 are exposed outside the material layer 120 , and the bottoms 130B of the isolation walls 130 are in contact with the substrate 110 . That is, there is no gap between the bottom 130B of the partition wall 130 and the substrate 110 , and the top 130T of the partition wall 130 also has no material layer 120 , which can reduce the chance of light leakage therefrom. In this embodiment, the light emitting element 140 may be a light emitting diode. The material of the partition wall 130 in this embodiment may be a polymer material. From another viewpoint, the material of the partition wall 130 of this embodiment may be a highly reflective material. The material of the partition wall 130 can be polyparahydroxystyrene, polyester cyclic acrylate, polyester derivatives, molecular glass, etc. and derivatives thereof as the main material, and titanium oxide (TiO ₂ ) can be added therein.

In this embodiment, each partition wall 130 has a first opening G12 and a second opening G14. Each of the first wires 142 extends from the corresponding first opening G12 of the partition wall 130 to the circuit region C10 . Each of the second wires 144 extends from the corresponding second opening G14 of the partition wall 130 to the circuit region C10 . The first wires 142 in the circuit region C10 can be connected downward to the common circuit VSS through conductive vias, and the second wires 144 can be downwardly connected to the driving circuit TFT in the circuit region C10 through conductive vias. The driving circuit TFT may include thin film transistors. In addition, the pixel region P10 in this embodiment has the light-emitting element 140 , the first wire 142 and the second wire 144 , and does not have other driving elements, that is, a circuit clearance area.

In this embodiment, each pixel region P10 has a plurality of light emitting elements 140 . The light emitting elements 140 in the same pixel region P10 share a first wire 142 and a second wire 144 . However, in other embodiments, each light-emitting element 140 may also use its own first wire 142 and second wire 144 .

3 is a partial cross-sectional schematic diagram of a display device according to another embodiment of the present invention. Referring to FIG. 3 , the display device 200 of the present embodiment is substantially the same as the display device 100 of FIGS. 1 and 2 , and only the differences are described herein. The display device 200 further includes a reflective material layer 150 disposed on the substrate 110 and covering the material layer 120 , the partition wall 130 and the light-emitting element 140 . The reflective material layer 150 can further ensure that the light emitted by the light-emitting element 140 is emitted from the light-emitting surface S12 and will not be emitted from a direction away from the substrate 110 , so as to improve the light-emitting rate. In addition, the materials of the reflective material layer 150 and the isolation wall 130 in this embodiment may be the same, but the present invention is not limited thereto. In other words, holes can be dug in the material layer 120 and filled with appropriate materials to form the reflective material layer 150 and the isolation wall 130 at one time.

FIG. 4 is a partial cross-sectional schematic diagram of a display device according to still another embodiment of the present invention. Referring to FIG. 4 , the display device 300 of this embodiment is substantially the same as the display device 100 of FIGS. 1 and 2 , and only the differences are described herein. Viewed from a direction D14 perpendicular to a normal direction D12 of the substrate 110 , the cross-section of each partition wall 330 is arc-shaped at the edge 332 of the side close to the corresponding light-emitting element 140 . In other words, when viewed along a direction D14 perpendicular to a normal direction D12 of the light-emitting surface S12 of the substrate 110 , the cross-section of each partition wall 330 is curved along the edge 332 of the side close to the corresponding light-emitting element 140 . In this way, the light emitted by the partition wall 330 to the light emitting element 140 can be improved spotlight effect. In this embodiment, the cross-section of each partition wall 330 also has an arc-shaped edge on the side away from the corresponding light-emitting element 140 , but the invention is not limited to this.

5 is a partial cross-sectional schematic diagram of a display device according to still another embodiment of the present invention. Referring to FIG. 5 , the display device 400 of this embodiment is substantially the same as the display device 100 of FIGS. 1 and 2 , and only the differences are described herein. The material layer 420 includes multiple sub-material layers 422 , that is, the material layer 420 is formed by stacking a plurality of sub-material layers 422 . Viewed from a direction D12 perpendicular to a normal direction D14 of the substrate 110 , the edges 432 on both sides of the cross-section of each partition wall 430 are stepped. On the other hand, the widths W12 , W14 and W16 of the partition wall 430 in the horizontal direction of FIG. 5 increase upward from the bottom 430B. In this way, the light condensing effect of the partition wall 430 on the light emitted by the light emitting element 140 can also be improved. In this embodiment, the edges 432 on both sides of the cross section of each partition wall 430 are stepped, but only the edge on one side close to the corresponding light-emitting element 140 may be stepped, and the invention is not limited to this. . For example, a pit can be formed after each sub-material layer 422 of the material layer 420 is formed, and a larger pit can be formed on the pit of the previous layer 422 after the next sub-material layer 422 is formed, that is, Form the desired stepped structure.

6 is a partial cross-sectional schematic diagram of a display device according to a further embodiment of the present invention. Referring to FIG. 6 , the display device 500 of this embodiment is substantially the same as the display device 100 of FIGS. 1 and 2 , and only the differences are described herein. In this embodiment, at least a part of a partition wall 530 in a pixel area is also embedded in the substrate 510 . For example, the left part of the partition wall 530 in FIG. 5 is not embedded in the substrate 510 , and the right part of the partition wall 530 in FIG. 5 is embedded in the substrate 510 . Thus, more The concentrating effect of the partition wall 530 on the light emitted by the light emitting element 140 is further improved. In other embodiments, one isolation wall 530 in one pixel area may also be entirely embedded in the substrate 510 .

FIG. 7 is a partial cross-sectional schematic diagram of a display device according to still another embodiment of the present invention. Referring to FIG. 7 , the display device of this embodiment is substantially the same as the display device 100 of FIGS. 1 and 2 , and only the differences are described here. In this embodiment, the tops 132T of the isolation walls 132 are not coplanar with the surface of the material layer 120 , that is, the tops 132T of the isolation walls 132 protrude from the surface of the material layer 120 to form a level difference structure. Because the first wire 142 and the second wire 144 pass through the first opening G12 and the second opening G14 as shown in FIG. 1 , they will not encounter the step structure formed by the partition wall 630 , which can avoid the occurrence of disconnection. question. In addition, the bottom portion 132B of the partition wall 132 may not be in contact with the substrate 110 .

FIG. 8 is a schematic partial top view of a display device according to another embodiment of the present invention. Referring to FIG. 8 , the display device 600 of this embodiment is substantially the same as the display device 100 of FIG. 1 , and only the differences are described herein. The partition wall 630 in this embodiment has only one opening G62, and both the first wire 642 and the second wire 644 extend outward from the opening G62.

FIG. 9 is a schematic partial top view of a display device according to still another embodiment of the present invention. Referring to FIG. 9 , the display device 700 of the present embodiment is substantially the same as the display device 100 of FIG. 1 , and only the differences are described herein. The wiring methods of the first wires 742 and the second wires 744 in this embodiment are different from those in FIG. 1 , so as to cope with the light-emitting elements 140 arranged in different orientations.

FIG. 10 is a schematic partial top view of a display device according to still another embodiment of the present invention. Referring to FIG. 10 , the display device 800 of this embodiment is substantially the same as the display device 100 of FIG. 1 , and only the differences are described herein. Viewed along a normal direction D12 of the substrate 110 , an edge 833 of one side of each partition wall 830 close to the corresponding light-emitting element 140 is arc-shaped. In this way, the condensing effect of the partition wall 830 on the light emitted by the light emitting element 140 can be improved. In addition, in this embodiment, there is only one light-emitting element 140 in each pixel region P10.

FIG. 11 is a schematic partial top view of a display device according to a further embodiment of the present invention. Referring to FIG. 11 , the display device 900 of this embodiment is substantially the same as the display device 100 of FIG. 1 , and only the differences are described herein. In this embodiment, there are three light-emitting elements 140 in each pixel region P10 , that is, each partition wall 930 surrounds the three light-emitting elements 140 . The first wires 142 of the three light-emitting elements 140 in the same pixel area P10 are structurally connected to each other, and the second wires 144 of the three light-emitting elements 140 in the same pixel area P10 are structurally connected to each other. In other words, the light emitting elements 140 in the same pixel region P10 share a first wire 142 and a second wire 144 .

To sum up, in the display device of the present invention, the partition walls surrounding the pixel regions can prevent light from entering the adjacent pixel regions, so that the display quality can be improved. In addition, the isolation wall retains a hole for the wire to pass through, which can reduce the probability of wire breakage and improve the yield.

110: Substrate

120: Material Layer

130: Separation Wall

130T: top

130B: Bottom

140: Light-emitting element

142: First wire

144: Second wire

P10: pixel area

C10: Circuit area

VSS: common circuit

TFT: driver circuit

S12: light-emitting surface

Claims (12)

A display device, comprising: a substrate with a plurality of pixel regions and a circuit region between the pixel regions; a material layer disposed on the substrate; a plurality of isolation walls disposed on the substrate and Embedded in the material layer, wherein each of the partition walls surrounds the corresponding pixel region, and each of the partition walls is a discontinuous wall; and a plurality of light-emitting elements, disposed on the material layer, wherein each of the light-emitting elements is located at In the corresponding pixel area, each light-emitting element has a first wire and a second wire, and at least one of the first wire and the second wire of each light-emitting element is connected from a corresponding one of the partition wall. The breach extends into the circuit area. The display device of claim 1, wherein tops of the partition walls are exposed outside the material layer, and bottoms of the partition walls are in contact with the substrate. The display device of claim 1, wherein each of the openings includes a first opening and a second opening, and each of the first wires extends from the first opening of the corresponding partition wall to the circuit area , each of the second wires extends from the corresponding second break of the partition wall to the circuit area. The display device according to claim 1, wherein when viewed along a normal direction of the substrate, an edge of one side of each of the partition walls close to the corresponding light-emitting element is arc-shaped. The display device according to claim 1, wherein when viewed along a direction perpendicular to a normal direction of the substrate, the cross-section of each partition wall is arc-shaped at the edge of the side close to the corresponding light-emitting element. The display device of claim 1, wherein each pixel area has a plurality of the light-emitting elements, the first wires of the light-emitting elements in the same pixel area are structurally connected to each other, and the same pixel The second wires of the light-emitting elements in the region are structurally connected to each other. The display device according to claim 1, wherein the material layer comprises a plurality of sub-material layers, when viewed along a direction perpendicular to a normal direction of the substrate, the edges on both sides of the cross-section of each partition wall are stepped, and The wall thickness of each of the partition walls increases upward from the bottom of each of the partition walls. The display device of claim 1, wherein the light-emitting elements are light-emitting diodes. The display device according to claim 1, wherein the materials of the partition walls are polymer materials. The display device of claim 1, further comprising a reflective material layer disposed on the substrate and covering the material layer, the partition walls and the light-emitting elements. The display device according to claim 10, wherein the material of the reflective material layer is the same as that of the partition walls. The display device according to claim 1, wherein at least a part of the partition walls is also embedded in the substrate.

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