US-20260130287-A1 - METHOD FOR MAKING LIGHT-EMITTING ASSEMBLY

US20260130287A1US 20260130287 A1US20260130287 A1US 20260130287A1US-20260130287-A1

Abstract

A method of making light-emitting assembly, the method includes: providing a substrate comprising a driving circuit configured for outputting a first driving signal; forming a light-emitting diode on the substrate, the light-emitting diode comprising a first electrode, a second electrode, and a light-emitting layer between the first electrode and the second electrode, wherein the first electrode is connected to the driving circuit to receive the first driving signal; forming a transparent electrode on a side of the second electrode away from the light-emitting layer to connect the second electrode, and an orthographic projection area of the transparent electrode on the substrate being larger than an orthographic projection area of the second electrode on the substrate; and connecting the transparent electrode to a wire transmitting a second driving signal, so that the light-emitting layer emits source light according to the first driving signal and the second driving signal.

Inventors

Kuang-Hua Liu

Assignees

CENTURY TECHNOLOGY (SHENZHEN) CORPORATION LIMITED

Dates

Publication Date: 20260507
Application Date: 20251231
Priority Date: 20220311

Claims (15)

1 . A method of making light-emitting assembly, the method comprising: providing a substrate comprising a driving circuit configured for outputting a first driving signal; forming a plurality of light-emitting diodes on the substrate, each of the plurality of light-emitting diode comprising a first electrode, a second electrode, and a light-emitting layer between the first electrode and the second electrode, wherein the first electrode is connected to the driving circuit to receive the first driving signal; forming a plurality of transparent electrodes electrically insulated from each other, wherein each of the plurality of light-emitting diodes is connected to a corresponding one of the plurality of transparent electrodes, and the plurality of transparent electrodes is on a side of the second electrode away from the light-emitting layer and is connected to the second electrode, and an orthographic projection area of each of the plurality of transparent electrodes on the substrate is larger than an orthographic projection area of the second electrode on the substrate; and connecting each of the plurality of transparent electrodes to a wire wherein in response to the wire transmitting a second driving signal, the light-emitting layer emits source light according to the first driving signal and the second driving signal.
2 . The method of making light-emitting assembly of claim 1 , wherein the orthographic projection of each of the plurality of transparent electrodes on the substrate completely covers the orthographic projection of the second electrode on the substrate.
3 . The method of making light-emitting assembly of claim 1 , further comprising: providing a plurality of connection pads and connecting each of the plurality of connection pads between the second electrode and corresponding one of the plurality of transparent electrodes; wherein the orthographic projection area of each of the plurality of transparent electrodes on the substrate is larger than an orthographic projection area of each of the plurality of connection pads on the substrate.
4 . The method of making light-emitting assembly of claim 3 , wherein each of the plurality of connection pads is made of metal.
5 . The method of making light-emitting assembly of claim 3 , wherein the orthographic projection of each of the plurality of transparent electrodes on the substrate completely covers the orthographic projection of corresponding one of the plurality of connection pads on the substrate.
6 . The method of making light-emitting assembly of claim 1 , further comprising electrically connecting the wire to the driving circuit, and configuring the driving circuit to output the second driving signal.
7 . The method of making light-emitting assembly of claim 1 , further comprising: covering an insulation layer on a surface of the substrate having the plurality of light-emitting diodes, wherein each of the plurality of light-emitting diodes is embedded in the insulation layer, the plurality of transparent electrodes are on a side of the insulation layer away from the substrate; and arranging the wire at least partially on the side of the insulation layer away from the substrate.
8 . The method of making light-emitting assembly of claim 7 , further comprising: etching the insulating layer to expose the second electrode of each of the plurality of light-emitting diodes from the insulating layer.
9 . The method of making light-emitting assembly of claim 7 , wherein the wire is further arranged to extend on a surface of the insulation layer away from the substrate.
10 . The method of making light-emitting assembly of claim 7 , wherein the wire is further arranged to extend a part of the wire on to a surface of the insulation layer away from the substrate, extend other part of the wire on to a surface of the substrate having the plurality of light emitting diodes, and electrically connecting the wire to the driving circuit.
11 . The method of making light-emitting assembly of claim 1 , wherein the plurality of light-emitting diodes are formed to emit the source light of a same color.
12 . The method of making light-emitting assembly of claim 11 , further comprising configuring the source light for illumination or displaying images.
13 . The method of making light-emitting assembly of claim 1 , wherein the plurality of light-emitting diodes are formed to emit the source light of different color, and the method further comprising configuring the source light to display an image.
14 . The method of making light-emitting assembly of claim 13 , wherein the source light comprises red, green, and blue light.
15 . The method of making light-emitting assembly of claim 1 , wherein the wire is made of metal.

Description

FIELD The present disclosure generally relates to lighting and display technology, particularly relates to a method for making the light-emitting assembly. BACKGROUND A light-emitting diode (LED) is widely used in lighting devices, display devices, and the like. A vertical type of LED has an upper electrode, a lower electrode, and a light-emitting layer between the upper electrode and the lower electrode. When a voltage difference between the upper electrode and the lower electrode reaches a preset value, the light-emitting layer will emit light of a certain wavelength. A size of a single LED is very small (micron scale), so one lighting device or one display device always includes a plurality of closely arranged LEDs to achieve light-emitting or display. The upper electrode and/or the lower electrode of each LED needs to be electrically connected to other conductive structures by connecting wires. However, it is difficult to align the connecting wires with the upper electrode and/or the lower electrode of the LED because of the small size of a single LED, which causes misalignment, wherein a current loop cannot be formed, and the LED cannot emit light normally. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 illustrates a display device in a first embodiment of the present disclosure. FIG. 2 is a cross-sectional view of a light-emitting assembly of the display device illustrated in FIG. 1. FIG. 3 is a planar view of the light-emitting assembly illustrated in FIG. 2. FIG. 4 illustrates a cross-sectional view of a light-emitting assembly in another embodiment of the present disclosure. FIG. 5 is a flow chart of a method of making the light-emitting assembly in a first embodiment of the present disclosure. FIG. 6 is a cross-sectional view of the light-emitting assembly after block S2 process of the flow chart shown in FIG. 5. FIG. 7 is another cross-sectional view of the light-emitting assembly after block S2 of the flow chart shown in FIG. 5. FIG. 8 is a cross-sectional view of the light-emitting assembly after block S3 process of the flow chart shown in FIG. 5. FIG. 9 illustrates a display device in a second embodiment of the present disclosure. DETAILED DESCRIPTION It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure. Several definitions that apply throughout this disclosure will now be presented. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series, and the like. “Above” means one layer is located on top of another layer. In one example, it means one layer is situated directly on top of another layer. In another example, it means one layer is situated over the second layer with more layers or spacers in between. When a feature or element is herein referred to as being “on” another feature or element, it can be directly on the other feature or element or intervening features and/or elements may also be present. It will also be understood that, when a feature or element is referred to as being “connected”, “attached” or “coupled” to another feature or element, it can be directly connected, attached or coupled to the other feature or element or intervening features or elements may be present. As shown in FIG. 1, a display device 100 is used to display images. The display device 100 is, for example, a smart device such as a mobile phone, a computer, a TV, or an outdoor display screen. In this embodiment, the display device 100 is a self-illuminating display device including a light-emitting assembly 10 shown in FIG. 2. The display device 100 may further include one or more optical function films (such as a brightness enhancement film, an antireflection film, etc., neither shown), an outer frame (not shown), or other structures. As shown in FIG. 2, the light-emitting assembly 10 includes a substrate 1 and a plurality of light-emitting diodes (LEDs) 2 on a surface of the substrate 1. In this embodiment, the substrate 1 includes a glass plate 11 and a driving circuit 12 on a surface of the glass plate 11. In this embodiment,