TWI820627B - Display device and manufacturing method thereof - Google Patents

Abstract

A display device and a manufacturing method thereof are provided. The display device includes a light-emitting element package including a first substrate, at least one light-emitting element, an encapsulation layer, and conductive pads. The first substrate has opposite upper and lower surfaces, and the edge of the lower surface has a notch. The at least one light emitting element is disposed on the upper surface of the first substrate, wherein the light emitting element has a positive electrode and a negative electrode. The encapsulation layer covers the light emitting element. The conductive pads are disposed on the lower surface of the first substrate, and respectively electrically connected to the positive electrode and the negative electrode of the light-emitting element.

Description

Display device and manufacturing method thereof

The present disclosure relates to a display device and a manufacturing method thereof.

Color displays usually consist of pixels that emit three colors of light: red, green, and blue. The display is, for example, a liquid crystal display, an organic light-emitting diode display or a micro-light-emitting diode (LED) display. Micro LED displays use micro LEDs to emit light. The biggest challenge in manufacturing micro-LED displays is how to place a large number of micro-LEDs at precise locations on the display substrate to form a pixel array. The method of placing the micro LEDs is, for example, to pick up the micro LEDs one by one from the supply substrate through a pick and place assembly, and then place the micro LEDs on the display substrate in sequence. Alternatively, a mass transfer method can be used to use the auxiliary substrate as a stamper, fill it with micro-LEDs, and then place the micro-LEDs on the display substrate through the stamper. However, the complexity and cost of these technologies increase rapidly as pixel density increases and display size decreases.

In view of the above, a new production method is urgently needed to overcome the above problems.

The present disclosure provides a light-emitting element package, which includes a first substrate, at least one light-emitting element, a packaging layer and a plurality of conductive pads. The first substrate has an upper surface and a lower surface opposite to each other, and an edge of the lower surface has a notch. At least one light-emitting element is disposed on the upper surface of the first substrate, wherein the light-emitting element has a positive electrode and a negative electrode. The encapsulation layer covers the light emitting element. A plurality of conductive pads are disposed on the lower surface of the first substrate and are electrically connected to the positive electrode and the negative electrode of the light-emitting element respectively.

In some embodiments, these light-emitting elements include red light-emitting elements, green light-emitting elements and blue light-emitting elements, wherein each of the red light-emitting element, the green light-emitting element and the blue light-emitting element has a positive electrode and a negative electrode.

In some embodiments, the conductive pads are electrically connected to the positive electrodes and negative electrodes of the red light-emitting element, the green light-emitting element and the blue light-emitting element respectively.

In some embodiments, these conductive pads include a first conductive pad, a second conductive pad, a third conductive pad and a fourth conductive pad. The first conductive pad is electrically connected to the positive electrode of the red light-emitting element, and the second conductive pad is electrically connected to the positive electrode of the red light emitting element. The third conductive pad is electrically connected to the positive electrode of the blue light-emitting element, and the fourth conductive pad is electrically connected to the negative electrodes of the red light-emitting element, the green light-emitting element and the blue light-emitting element.

In some embodiments, the lower surfaces of the conductive pads are each polygonal.

In some embodiments, the lower surfaces of the conductive pads are substantially flush.

In some embodiments, the outline of the light-emitting element package is a polygon when viewed from above.

In some embodiments, the outline of the light-emitting element package is a quadrilateral when viewed from above.

In some embodiments, the light emitting element package further includes pillars disposed on the packaging layer.

In some embodiments, the light emitting device package further includes an adhesive layer disposed between the pillar and the packaging layer.

The present disclosure provides a display device, which includes the light-emitting element package of any of the aforementioned embodiments, a second substrate, and a plurality of conductive junctions. The second substrate has a groove and a protruding portion, and the protruding portion extends from the side wall of the groove. A plurality of conductive contacts are disposed on the bottom surface of the trench. The light-emitting element package is disposed in the trench, the protruding portion of the second substrate is located in the recess of the first substrate of the light-emitting element package, and the conductive pads of the light-emitting element package are each electrically connected to some conductive junctions.

In some embodiments, these light-emitting elements include red light-emitting elements, green light-emitting elements and blue light-emitting elements, wherein each of the red light-emitting element, the green light-emitting element and the blue light-emitting element has a positive electrode and a negative electrode.

In some embodiments, these conductive pads include a first conductive pad, a second conductive pad, a third conductive pad and a fourth conductive pad. The first conductive pad is electrically connected to the positive electrode of the red light-emitting element, and the second conductive pad is electrically connected to the positive electrode of the red light emitting element. is electrically connected to the positive electrode of the green light-emitting element, the third conductive pad is electrically connected to the positive electrode of the blue light-emitting element, and the fourth conductive pad is electrically connected to the negative electrodes of the red light-emitting element, the green light-emitting element and the blue light-emitting element. The number of conductive contacts is four, and these conductive contacts are electrically connected to the first conductive pad, the second conductive pad, the third conductive pad and the fourth conductive pad respectively.

In some embodiments, the protrusion substantially matches the shape of the recess.

In some embodiments, the trench has a polygonal outline when viewed from above.

The present disclosure provides a method for manufacturing a display device, which includes the following operations: (a) providing a first substrate and a plurality of conductive interfaces, wherein the first substrate has a trench and a protruding portion, and the protruding portion extends from the side wall of the trench , these conductive contacts are disposed on the bottom surface of the trench. (b) Flow the liquid suspension containing the light-emitting element package through the upper surface of the first substrate, wherein the light-emitting element package includes: a second substrate, at least one light-emitting element, an encapsulation layer, pillars and a plurality of conductive pads. The second substrate has an upper surface and a lower surface opposite to each other, and an edge of the lower surface has a notch. At least one light-emitting element is disposed on the upper surface of the second substrate, wherein the light-emitting element has a positive electrode and a negative electrode. The encapsulation layer covers the light emitting element. The pillars are arranged on the encapsulation layer. A plurality of conductive pads are disposed on the lower surface of the second substrate and are electrically connected to the positive electrode and the negative electrode of the light-emitting element respectively. (c) Arrange the light-emitting element package in the trench, wherein the protruding portion of the first substrate is located in the recess of the second substrate.

In some embodiments, the method of manufacturing a display device further includes: after arranging the light-emitting element package in the trench, removing the pillars from the packaging layer.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are intended to provide further explanation of the present disclosure as claimed.

A plurality of implementations of the present disclosure will be disclosed in figures below. For clarity of explanation, many practical details will be explained in the following description. However, it should be understood that these practical details should not be used to limit the disclosure. That is, in some implementations of this disclosure, these practical details are not necessary. In addition, for the sake of simplifying the drawings, some commonly used structures and components will be illustrated in a simple schematic manner in the drawings. The same numbers in the drawings represent the same or similar components.

Although a series of operations or steps are used below to illustrate the method disclosed herein, the order shown in these operations or steps should not be construed as a limitation of the disclosure. For example, certain operations or steps may be performed in a different order and/or concurrently with other steps. Furthermore, not all illustrated operations, steps, and/or features must be performed to implement implementations of the present disclosure. Additionally, each operation or step described herein may include several sub-steps or actions.

The present disclosure provides a light emitting element package. Please refer to Figures 1A and 1B. Figure 1A is a schematic cross-sectional view of a light emitting element package according to various embodiments of the present disclosure. Figure 1B is a schematic structural diagram of a light-emitting element in a light-emitting element package according to various embodiments of the present disclosure, viewed from above.

As shown in FIG. 1A , the light emitting element package 100 includes a substrate 110 , at least one light emitting element L, a packaging layer 120 , conductive pads 140 and 150 and pillars 130 . The substrate 110 has an upper surface S1 and a lower surface S2 facing each other. The edge E of the lower surface S2 has a notch N. The light-emitting element L is disposed on the upper surface S1 of the substrate 110 . The encapsulation layer 120 covers the light emitting element L. The pillars 130 are disposed on the encapsulation layer 120 . A plurality of conductive pads 140 and 150 are provided on the lower surface S2 of the substrate 110 . As shown in FIG. 1B , the light-emitting element L has a positive electrode L1 and a negative electrode L2. The conductive pads 140 and 150 shown in Figure 1A are electrically connected to the positive electrode L1 and the negative electrode L2 of the light-emitting element L shown in Figure 1B respectively. For example, the conductive pads 140 and 150 can pass through the wiring in the substrate 110 (not shown) are electrically connected to the positive electrode L1 and the negative electrode L2 respectively. In other words, the substrate 110 is provided with a circuit layout for interconnecting the light-emitting element L and the target substrate.

The light-emitting element package 100 of the present disclosure can be installed in a groove of a substrate through fluid self-assembly to form a display device. It is worth noting that during the fluid self-assembly process, the encapsulation layer 120 isolates the light-emitting element L from the liquid, which can protect the light-emitting element L and prevent the light-emitting element L from being damaged by the collision of the light-emitting element package 100 when the liquid flows. After installation, posts 130 are removed from encapsulation layer 120 . In other embodiments, the light emitting element package 100 further includes an adhesive layer (not shown) disposed between the pillars 130 and the packaging layer 120 . The installation process by fluid self-assembly will be described in detail later.

Figure 1A takes one light-emitting element L as an example. However, the number of light-emitting elements is not limited to this. The number of light-emitting elements can be adjusted according to design requirements, such as two, three, four, etc., but is not limited to this. In some embodiments, the light-emitting element L is a red light-emitting element, a green light-emitting element, a blue light-emitting element, or a white light-emitting element, but is not limited thereto. Figure 1A takes two conductive pads 140 and 150 as an example. However, the number of conductive pads is not limited to this. The number of conductive pads can be adjusted according to the design requirements or the number of light-emitting elements, for example, two, three, or four. Etc., but not limited to this.

In some embodiments, as shown in Figure 1A, the lower surfaces of the conductive pads 140, 150 are substantially flush, but are not limited thereto. In other embodiments, the thickness of the conductive pad 140 is greater than the thickness of the conductive pad 150 . In yet other embodiments, the thickness of conductive pad 140 is less than the thickness of conductive pad 150 .

In some embodiments, the lower surfaces of the conductive pads 140 and 150 are each polygonal, such as a triangle, a quadrilateral, a pentagon or a hexagon, but are not limited thereto. In other embodiments, the lower surfaces of the conductive pads 140 and 150 are each in a circular, oval or other arbitrary shape.

In some embodiments, the outline of the light emitting element package 100 in plan view is a polygon, such as a triangle, a quadrilateral, a pentagon or a hexagon, but is not limited thereto. In other embodiments, the outline of the light emitting element package 100 in plan view is circular, elliptical, or other arbitrary shapes.

In some embodiments, the light emitting element package 100 does not include the pillars 130 . As shown in FIG. 1C , FIG. 1C is a schematic cross-sectional view of a light emitting element package 100A according to various embodiments of the present disclosure. The difference between the light-emitting element package 100A and the light-emitting element package 100 is that there are no pillars on the packaging layer 120 of the light-emitting element package 100A.

The present disclosure provides another light emitting element package. Please refer to Figures 2A and 2B. Figure 2A is a schematic cross-sectional view of a light emitting element package according to various embodiments of the present disclosure. Figure 2B is a schematic structural diagram of a light-emitting element in a light-emitting element package according to various embodiments of the present disclosure, viewed from above.

As shown in FIG. 2A , the light emitting element package 200 includes a substrate 110 , a red light emitting element R, a green light emitting element G, a blue light emitting element B, a packaging layer 220 , conductive pads 420 and 430 and pillars 130 . The substrate 110 has an upper surface S1 and a lower surface S2 facing each other. The edge E of the lower surface S2 has a notch N. The red light-emitting element R, the green light-emitting element G and the blue light-emitting element B are disposed on the upper surface S1 of the substrate 110 . The encapsulation layer 220 covers the red light-emitting element R, the green light-emitting element G and the blue light-emitting element B. The pillars 130 are disposed on the encapsulation layer 220 . The conductive pads 420 and 430 are disposed on the lower surface S2 of the substrate 110 . As shown in Figure 2B, the red light-emitting element R has an anode R1 and a cathode R2, the green light-emitting element G has an anode G1 and a cathode G2, and the blue light-emitting element B has an anode B1 and a cathode B2. The conductive pads 420 and 430 shown in Figure 2A are electrically connected to the positive electrodes R1, G1, B1 and negative electrodes R2 of the red light-emitting element R, the green light-emitting element G and the blue light-emitting element B shown in Figure 2B, respectively. G2, B2. For example, the conductive pads 420 and 430 can be electrically connected to the positive electrodes R1, G1, and B1 and the negative electrodes R2, G2, and B2 respectively through traces (not shown) in the substrate 110. In other words, a circuit layout is provided in the substrate 110 for interconnecting the red light-emitting element R, the green light-emitting element G and the blue light-emitting element B with the target substrate.

Please refer to Figure 2B, Figure 3 and Figure 4. Figures 3 and 4 are schematic diagrams of the wiring of the substrate 110 of the light emitting element package 200 according to various embodiments of the present disclosure. The positive electrode R1 of the red light-emitting element R is connected to the circuit 310 below it, the circuit 310 is connected to the conductive hole 312 below it, and the conductive hole 312 is connected to the conductive pad 410 below it. The positive electrode G1 of the green light-emitting element G is connected to the circuit 320 below it, the circuit 320 is connected to the conductive hole 322 below it, and the conductive hole 322 is connected to the conductive pad 420 below it. The positive electrode B1 of the blue light-emitting element B is connected to the circuit 330 below it, the circuit 330 is connected to the conductive hole 332 below it, and the conductive hole 332 is connected to the conductive pad 430 below it. Furthermore, the negative electrodes R2, G2, and B2 of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B are connected to the lines 340 under these negative electrodes R2, G2, and B2, and the lines 340 are connected to the via holes thereunder. 342, the via 342 is connected to the conductive pad 440 thereunder.

Through the structural design of the wiring mentioned above, the conductive pad 410 is electrically connected to the positive electrode R1 of the red light-emitting element R, the conductive pad 420 is electrically connected to the positive electrode G1 of the green light-emitting element G, and the conductive pad 430 is electrically connected to the blue light-emitting element. The positive electrode B1 of element B and the conductive pad 440 are electrically connected to the negative electrodes R2, G2, and B2 of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B. Figure 4 takes four conductive pads 410, 420, 430, and 440 as an example. However, the number of conductive pads is not limited to this. The number of conductive pads can be adjusted according to the design requirements or the number of light-emitting elements, for example, two or three. One, four, five, six, etc., but not limited to this.

The light-emitting element package 200 of the present disclosure can be installed in a groove of a substrate through fluid self-assembly to form a display device. It is worth noting that during the fluid self-assembly process, the encapsulation layer 220 isolates the red light-emitting element R, the green light-emitting element G and the blue light-emitting element B from the liquid, which can protect the above-mentioned light-emitting elements and prevent the light-emitting element from being encapsulated when the liquid flows. The collision of the body 200 damages the above-mentioned light-emitting element. After installation, posts 130 are removed from encapsulation layer 220 . In other words, in some embodiments, the light emitting element package 200 does not include the pillars 130 . The process of installing the light emitting element package 200 by fluid self-assembly will be described in detail later.

The implementation of the light-emitting element package 200 in FIG. 2A may refer to the implementation of the light-emitting element package 100 in FIG. 1A . In some embodiments, the lower surfaces of the conductive pads 410, 420, 430, 440 are substantially flush, but are not limited thereto. In other embodiments, the conductive pads 410, 420, 430, 440 have different thicknesses. For example, the thickness of the conductive pad 440 is greater than the thickness of the conductive pads 410, 420, and 430, or the thickness of the conductive pad 440 is less than the thickness of the conductive pads 410, 420, and 430, but it is not limited thereto.

In some embodiments, the lower surfaces of the conductive pads 410, 420, 430, and 440 are each polygonal, such as a triangle, a quadrilateral, a pentagon, or a hexagon, but are not limited thereto. In other embodiments, the lower surfaces of the conductive pads 410, 420, 430, and 440 are each circular, elliptical, or other arbitrary shapes.

In some embodiments, the outline of the light emitting element package 200 in plan view is a polygon, such as a triangle, a quadrilateral, a pentagon or a hexagon, but is not limited thereto. In other embodiments, the outline of the light emitting element package 200 in plan view is circular, elliptical, or other arbitrary shapes.

FIG. 5 is a schematic cross-sectional view of a light emitting element package 500 according to various embodiments of the present disclosure. The difference between the light-emitting element package 500 in FIG. 5 and the light-emitting element package 200 in FIG. 2A is that the light-emitting element package 500 further includes an adhesive layer 510 disposed between the pillar 130 and the packaging layer 220 . Subsequent layer 510 may facilitate attachment of post 130 to encapsulation layer 220 . The subsequent layer 510 is, for example, silicon dioxide, but is not limited thereto. In some implementations, the adhesive layer 510 may be wet etched to remove the pillars 130 .

Figure 6 is a schematic cross-sectional view of a display device 600 according to various embodiments of the present disclosure. The display device 600 includes a light emitting element package 200, a substrate 610, and conductive contacts 612 and 614 as shown in FIG. 2 . The substrate 610 has a trench T and a protruding portion TP. The protruding portion TP extends from the sidewall SW of the trench T. Conductive contacts 612 and 614 are provided on the bottom surface BS of the trench T. The light-emitting element package 200 is disposed in the trench T, and the protruding portion TP of the substrate 610 is located in the notch N of the substrate 110 of the light-emitting element package 200 .

FIG. 6 only shows one trench T, but the number of trenches T is not limited thereto. The number of trenches can be adjusted according to design requirements, and the substrate 610 can include multiple trenches.

In order to understand the structure of the display device 600 more clearly, please refer to FIG. 4 , FIG. 6 , FIG. 7 and FIG. 8 at the same time. Figure 7 is a schematic cross-sectional view of a substrate 610 and conductive junctions 612, 614 according to various embodiments of the present disclosure. Figure 8 is a schematic top view of a substrate 610 and conductive junctions 612, 614, 616, 618 in accordance with various embodiments of the present disclosure. The light-emitting element package 200 is disposed in the trench T, and the conductive pads 410, 420, 430, and 440 of the light-emitting element package 200 are each electrically connected to the conductive junctions 618, 612, 614, and 616. Figure 8 takes four conductive contacts 612, 614, 616, and 618 as an example. However, the number of conductive contacts is not limited to this. The number of conductive contacts can be adjusted according to the design and number of conductive pads, for example, two. , three, four, five, six, etc., but not limited to this. In some embodiments, the conductive junctions 612, 614, 616, and 618 are connected to the wiring (not shown) in the substrate 610 to control the light emission of the light emitting element package 200.

As shown in Figure 8, in some embodiments, the outline of the trench T in plan view is a polygon, such as a triangle, a quadrilateral, a pentagon or a hexagon, but is not limited thereto. In other embodiments, the outline of the trench T in plan view is circular, elliptical, or other arbitrary shapes. In some embodiments, the trench T substantially matches the shape of the light emitting element package 200 .

Please refer to Figures 4 and 8 at the same time. In some embodiments, the shapes of the protrusion TP and the notch N substantially match. In some embodiments, the volume of the protrusion TP is substantially equal to the volume of the notch N. In other embodiments, the volume of the protrusion TP is smaller than the volume of the notch N. When the light emitting element package 200 is to be disposed in the trench T of the substrate 610, the light emitting element package 200 will be disposed in the trench T only when the protruding portion TP of the substrate 610 is aligned with the notch N of the substrate 110, so that Ensure that the conductive pads 410, 420, 430, and 440 of the light emitting element package 200 are connected to the conductive interfaces 612, 614, 616, and 618 in the correct direction and polarity.

The present disclosure provides a method of manufacturing a display device. Please refer to Figure 2A, Figure 2B and Figures 6 to 9. Figure 9 is a schematic diagram of a process of making a display device 600 according to various embodiments of the present disclosure. The method includes the following operations: (a) As shown in Figures 7 to 8, a substrate 610 and a plurality of conductive interfaces 612, 614, 616, 618 are provided, wherein the substrate 610 has a trench T and a protruding portion TP, and the protruding portion TP is from The sidewall SW of the trench T extends out, and the conductive contacts 612, 614, 616, and 618 are provided on the bottom surface BS of the trench T. (b) As shown in FIG. 9 , the liquid suspension containing the light-emitting element package 200 is caused to flow through the upper surface S3 of the substrate 610 . Since the light emitting element package 200 has the pillars 130 , when the pillars 130 contact the upper surface S3 of the substrate 610 , they will flip over on the substrate 610 due to the flow of liquid until they fall into the trench T. As shown in FIGS. 2A and 4 , the light-emitting element package 200 includes a substrate 110, a red light-emitting element R, a green light-emitting element G, a blue light-emitting element B, a packaging layer 220, and conductive pads 410, 420, 430, and 440. , and column 130. The substrate 110 has an upper surface S1 and a lower surface S2 facing each other. The edge E of the lower surface S2 has a notch N. The red light-emitting element R, the green light-emitting element G and the blue light-emitting element B are disposed on the upper surface S1 of the substrate 110 . The encapsulation layer 220 covers the red light-emitting element R, the green light-emitting element G and the blue light-emitting element B. The pillars 130 are disposed on the encapsulation layer 220 . The conductive pads 410, 420, 430, and 440 are disposed on the lower surface S2 of the substrate 110. As shown in Figure 2B, the red light-emitting element R has an anode R1 and a cathode R2, the green light-emitting element G has an anode G1 and a cathode G2, and the blue light-emitting element B has an anode B1 and a cathode B2. The conductive pads 410, 420, 430, and 440 are electrically connected to the positive electrodes R1, G1, and B1 and the negative electrodes R2, G2, and B2 of the red light-emitting element R, the green light-emitting element G, and the blue light-emitting element B, respectively. (c) As shown in FIG. 6 , the light emitting element package 200 is placed in the trench T, where the protruding portion TP of the substrate 610 is located in the notch N of the substrate 110 . In detail, when the light emitting element package 200 rolls to the groove T of the substrate 610, it will fall into the groove T, and only when the protrusion TP of the substrate 610 is aligned with the notch N of the substrate 110, the light emitting element will emit light. The element package 200 will be disposed in the trench T to ensure that the conductive pads 410, 420, 430, and 440 of the light-emitting element package 200 are connected to the conductive interfaces 612, 614, 616, and 618 in the correct direction and polarity.

In some embodiments, after disposing the light emitting device package 200 in the trench T, the pillars 130 are removed from the packaging layer 220 .

FIG. 10 is a schematic diagram of a process of making a display device 600 according to various embodiments of the present disclosure. As shown in Figure 10, when the light-emitting element package 200 falls into the trench T, the conductive pads 410, 420, 430, and 440 of the light-emitting element package 200 do not fall downward into the trench T, so the light-emitting element package 200 cannot If placed in the groove T, it will be driven by the liquid suspension, leave the groove T, continue to roll on the substrate 610, and may fall into another groove. Similarly, if the conductive pads 410, 420, 430, and 440 of the light-emitting element package 200 fall downward into the trench T, however, the protruding portion TP of the substrate 610 is not aligned with the notch N of the substrate 110, the light-emitting element package 200 It cannot be placed in the trench T, and will be driven by the liquid suspension to leave the trench T. The design of the protrusion TP and the notch N in this disclosure can avoid incorrect docking of the light-emitting element package 200 and the conductive interface. , thereby improving manufacturing yield.

When manufacturing a display device, the above-mentioned fluid self-assembly method can be used to install light-emitting element packages with different emitting colors on a substrate with multiple grooves in stages. For example, firstly, The component package is first installed in a part of the groove of the substrate, the light-emitting component package that emits green light is first installed in another part of the groove of the substrate, and then the light-emitting component package that emits blue light is first installed in the remaining groove of the substrate. , forming a display device. Therefore, three transfers are required to manufacture the display device using the above process. It is worth noting that when manufacturing a display device, the above-mentioned fluid self-assembly method can be used to use the light-emitting element package 200 containing light-emitting elements of three different colors as a transfer unit and be installed in the groove of the substrate at one time. Therefore, only one transfer is required to manufacture the display device using the above process. The light-emitting element package 200 is a light-emitting unit that can emit white light. Therefore, compared with the step-by-step installation method, the time required for installation of the light-emitting element package 200 of the present disclosure is only 1/1 of the time required for the step-by-step installation. 3. Therefore, the structural design of the light-emitting element package 200 disclosed in this disclosure can significantly reduce manufacturing costs, significantly save manufacturing time, and increase assembly speed. For example, assembly speeds can exceed 50 million transfer units per hour. The manufacturing method of the present disclosure can be used to produce LED displays with small pitch or high pixels per inch (PPI) value.

In summary, the structural design of the protrusions and recesses in the light-emitting element package of the present disclosure can ensure that the conductive pads and conductive interfaces of the light-emitting element package are connected to the conductive interface in the correct direction and polarity, thereby improving manufacturing yield rate. Moreover, the method of manufacturing a display device disclosed in the present disclosure can achieve mass transfer of packages to the substrate through fluid self-assembly, thereby significantly reducing manufacturing costs and significantly saving manufacturing time, which is beneficial to the production of display devices. Great help.

Although the present disclosure has been described in considerable detail with reference to certain embodiments, other embodiments are possible. Accordingly, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.

It will be apparent to those skilled in the art that various modifications and changes can be made in the structure of the present disclosure without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the present disclosure cover the modifications and variations of this disclosure falling within the scope of the appended claims.

100, 100A, 200, 500: Light emitting element package 110,610:Substrate 120,220: Encapsulation layer 130: column 140,150:Conductive pad 310,320,330,340: Line 312,322,332,342: Guide hole 410,420,430,440: Conductive pad 510:Add layer 600: Display device 612,614,616,618: Conductive junction B: Blue light emitting element B1: positive pole B2: negative pole BS: bottom surface E: edge G: Green light emitting element G1: positive pole G2: negative pole L:Light-emitting element L1: positive pole L2: negative pole N: notch R: red light emitting element R1: positive pole R2: negative pole S1: upper surface S2: Lower surface S3: Upper surface SW: side wall T:Trench TP:Protrusion

The above and other aspects, features and other advantages of this disclosure can be understood more clearly by referring to the content of the specification and the accompanying drawings, in which: Figures 1A, 1C and 2A are schematic cross-sectional views of light emitting element packages according to various embodiments of the present disclosure. Figures 1B and 2B are schematic structural diagrams of light-emitting elements in a light-emitting element package according to various embodiments of the present disclosure. Figures 3 and 4 are schematic wiring diagrams of the substrate of the light emitting element package according to various embodiments of the present disclosure. Figure 5 is a schematic cross-sectional view of a light emitting element package according to various embodiments of the present disclosure. Figure 6 is a schematic cross-sectional view of a display device according to various embodiments of the present disclosure. Figure 7 is a schematic cross-sectional view of a substrate and conductive junction according to various embodiments of the present disclosure. Figure 8 is a schematic top view of a substrate and conductive junction according to various embodiments of the present disclosure. Figures 9 and 10 are schematic diagrams of the process of manufacturing a display device according to various embodiments of the present disclosure.

100:Light-emitting element package

110:Substrate

120: Encapsulation layer

130: column

140,150:Conductive pad

E: edge

L:Light-emitting element

N: notch

L1: positive pole

S1: upper surface

S2: Lower surface

Claims (7)

A display device including: A light-emitting element package, including: A first substrate has an upper surface and a lower surface opposite to each other, and an edge of the lower surface has a notch; At least one light-emitting element is disposed on the upper surface of the first substrate, wherein the light-emitting element has a positive electrode and a negative electrode; An encapsulation layer covering the light-emitting element; and A plurality of conductive pads are disposed on the lower surface of the first substrate and are electrically connected to the positive electrode and the negative electrode of the light-emitting element respectively; a second substrate having a groove and a protrusion extending from one side wall of the groove; and A plurality of conductive contacts are provided on a bottom surface of the trench, The light-emitting element package is disposed in the trench, the protruding portion of the second substrate is located in the recess of the first substrate of the light-emitting element package, and the conductive pads of the light-emitting element package are each electrically These conductive interfaces are electrically connected. The display device of claim 1, wherein the light-emitting elements include a red light-emitting element, a green light-emitting element and a blue light-emitting element, wherein the red light-emitting element, the green light-emitting element and the blue light-emitting element Each has a positive electrode and a negative electrode. The display device of claim 2, wherein the conductive pads include a first conductive pad, a second conductive pad, a third conductive pad and a fourth conductive pad, and the first conductive pad is electrically connected to the The anode of the red light-emitting element, the second conductive pad is electrically connected to the anode of the green light-emitting element, the third conductive pad is electrically connected to the anode of the blue light-emitting element, and the fourth conductive pad is electrically connected to the anode of the blue light-emitting element. The number of conductive junctions connected to the negative electrodes of the red light-emitting element, the green light-emitting element and the blue light-emitting element is four, and the conductive junctions are electrically connected to the first conductive pad and the blue light-emitting element respectively. The second conductive pad, the third conductive pad and the fourth conductive pad. The display device of claim 1, wherein the protrusion substantially matches the shape of the notch. The display device of claim 1, wherein the groove has a polygonal outline in plan view. A method of manufacturing a display device, comprising: (a) Provide a first substrate and a plurality of conductive contacts, wherein the first substrate has a trench and a protrusion extending from one side wall of the trench, and the conductive contacts are disposed on the on one bottom surface of the trench; (b) Flow a liquid suspension containing a light-emitting element package through an upper surface of the first substrate, wherein the light-emitting element package includes: A second substrate has an upper surface and a lower surface opposite to each other, and an edge of the lower surface has a notch; At least one light-emitting element is disposed on the upper surface of the second substrate, wherein the light-emitting element has a positive electrode and a negative electrode; a packaging layer covering the light-emitting element; a pillar disposed on the encapsulation layer; and A plurality of conductive pads are disposed on the lower surface of the second substrate and are electrically connected to the positive electrode and the negative electrode of the light-emitting element respectively; and (c) Arrange the light-emitting element package in the trench, wherein the protrusion of the first substrate is located in the recess of the second substrate. The method of claim 6, further comprising: after disposing the light-emitting element package in the trench, removing the pillar from the packaging layer.

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