Light-emitting device and display device

Abstract

The application discloses a light emitting device and a display device. The light emitting device comprises a transparent layer, three light emitting elements, a wiring layer and an insulating layer. The transparent layer comprises a first side, a second side, a third side and a fourth side connected in sequence, wherein the fourth side and the first side are connected. The three light emitting elements comprise a first light emitting element, a second light emitting element and a third light emitting element in sequence along the direction from the second side to the fourth side, and the light emitting colors of each light emitting element are different, wherein the size of at least one light emitting element is smaller than that of any other light emitting element. The wiring layer is arranged above the three light emitting elements, and the wiring layer is electrically connected with each light emitting element. The insulating layer is arranged on part of the wiring layer. Thus, the application improves the light emitting brightness of the light emitting device by controlling the size proportion of the light emitting elements emitting different colors of light in the light emitting device.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor devices, and in particular to a light-emitting device and a display device. Background Art

[0002] LED chips are widely used in display devices, vehicle lamps, general lighting and other fields due to their high reliability, long life and low power consumption. For example, LED chips can be used as backlight light sources for various display devices. At present, the size of tiny chips (micro-LED chips, generally less than 100nm) is too small, and the process of grabbing the chips and fixing them on the display panel is relatively difficult. Therefore, the three RGB chips are formed into a unit pixel package, which makes it easier to grab the unit pixel and fix it to the display panel.

[0003] Existing unit pixel packages also present some unresolved issues. For example, a unit pixel typically contains three light-emitting elements with different light colors. Because light-emitting elements of the same size emit varying amounts of light, the color ratio of the light output is substandard, affecting the brightness of the entire unit pixel. Furthermore, increasing the brightness of a single chip is currently difficult. Increasing the number of light-emitting elements within a unit pixel to increase the light output of a specific color would increase the overall unit pixel area, hindering device miniaturization. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a light-emitting device and a display device to control the ratio of each color in a pixel unit to make the light output brightness of a single pixel unit higher.

[0005] In order to achieve the above-mentioned and other related objectives, the present invention provides a light-emitting device, comprising:

[0006] A transparent layer comprising a first side, a second side, a third side, and a fourth side connected in sequence, wherein the fourth side is connected to the first side;

[0007] Three light-emitting elements, including a first light-emitting element, a second light-emitting element, and a third light-emitting element in sequence from the second side to the fourth side, wherein at least one light-emitting element has a size smaller than that of any other light-emitting element;

[0008] A wiring layer is provided above the three light emitting elements, and the wiring layer is electrically connected to each light emitting element;

[0009] The insulating layer is arranged on a portion of the wiring layer.

[0010] According to one aspect of the present invention, the present invention further provides a display device, comprising:

[0011] display substrate;

[0012] At least one light emitting device is disposed on the surface of the display substrate. The light emitting device is electrically connected to the display substrate. The light emitting device is the above-mentioned light emitting device.

[0013] Compared with the prior art, the light-emitting device and display device of the present invention have at least the following beneficial effects:

[0014] The light-emitting device of the present invention includes a transparent layer, three light-emitting elements, a wiring layer and an insulating layer. The transparent layer includes a first side, a second side, a third side and a fourth side connected in sequence, wherein the fourth side is connected to the first side. The three light-emitting elements include a first light-emitting element, a second light-emitting element and a third light-emitting element in sequence along the direction from the second side to the fourth side, and the light-emitting color of each light-emitting element is different, wherein at least one light-emitting element has a size smaller than that of any other light-emitting element. The wiring layer is arranged above the three light-emitting elements, and the wiring layer is electrically connected to each of the light-emitting elements. The insulating layer is arranged on part of the wiring layer. Therefore, the present invention optimizes the light-emitting ratio configuration of the light-emitting device by controlling the size ratio of the light-emitting elements emitting light of different colors in the light-emitting device, and approaches the optimal ratio after RGB is combined into white light.

[0015] Furthermore, the three light-emitting elements within the light-emitting device are red, green, and blue. The green and blue light-emitting elements are enlarged to optimize the ratio of light output from the different colors. Furthermore, the increased size of the blue light-emitting element also improves its anti-static properties.

[0016] Furthermore, in order to ensure that the size of the entire light-emitting device remains unchanged, the center of the blue light-emitting element is translated relative to the center of the red light-emitting element or the green light-emitting element, so that the light-emitting area of ​​the blue light-emitting element is symmetrical on the left and right, and the distance between the electrode of the blue light-emitting element and the adjacent pad wiring is increased, thereby reducing the risk of short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a top view of the light emitting device according to one embodiment of the present invention;

[0018] Figure 2 is a schematic top view of the structure of a light emitting device according to another embodiment of the present invention;

[0019] Figure 3 In one embodiment of the present invention, Figure 1 Schematic diagram of the structure in the B-B' direction;

[0020] Figure 4 In one embodiment of the present invention, Figure 1Schematic diagram of the structure in the B-B' direction;

[0021] Figure 5 Schematic diagram of the structure of a display device in an embodiment of the present invention.

[0022] List of reference numerals:

[0023] 01 First side

[0024] 02 Second side

[0025] 03 The Third Side

[0026] 04 The Fourth Side

[0027] 100 transparent layers

[0028] 200 adhesive layer

[0029] 300 fill layers

[0030] 401 first light-emitting element

[0031] 402 second light emitting element

[0032] 403 third light-emitting element

[0033] 410 first electrode

[0034] 420 second electrode

[0035] 500 wiring layers

[0036] 501 First Floor

[0037] 502 Second Floor

[0038] 510 First pad wiring

[0039] 520 Second pad wiring

[0040] 530 Third pad wiring

[0041] 540 Fourth pad wiring

[0042] 550 Connection Wiring

[0043] 601 First Guard Electrode

[0044] 602 second protective electrode

[0045] 603 Third Guard Electrode

[0046] 604 fourth protective electrode

[0047] 700 insulation layer DETAILED DESCRIPTION

[0048] The following specific embodiments illustrate the embodiments of the present invention. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features of the embodiments may be combined with each other unless they conflict.

[0049] It should be noted that the diagrams provided in the embodiments of the present invention are only schematic illustrations of the basic concept of the present invention. Although the diagrams only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation, the form, quantity, and proportion of each component in actual implementation can be changed at will, and the component layout form may also be more complex. The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of this application. Therefore, they have no technical significance. Any structural modification, change in proportional relationship, or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose of the present invention.

[0050] In order to improve the light emission ratio of different colors of light in a light-emitting device and improve the light emission brightness of the light-emitting device, this embodiment provides a light-emitting device, including:

[0051] A transparent layer comprising a first side, a second side, a third side, and a fourth side connected in sequence, wherein the fourth side is connected to the first side;

[0052] Three light-emitting elements, including a first light-emitting element, a second light-emitting element, and a third light-emitting element in sequence from the second side to the fourth side, wherein at least one light-emitting element has a size smaller than that of any other light-emitting element;

[0053] A wiring layer is provided above the three light emitting elements, and the wiring layer is electrically connected to each light emitting element;

[0054] The insulating layer is provided on a portion of the wiring layer. Thus, the embodiment improves the brightness of the light emitting device by controlling the size ratio of the light emitting elements emitting light of different colors in the light emitting device.

[0055] Optionally, the first light-emitting element is a red light-emitting element, the second light-emitting element is a green light-emitting element, and the third light-emitting element is a blue light-emitting element.

[0056] Optionally, the size of the red light emitting element is smaller than that of the green light emitting element, and the size of the red light emitting element is smaller than that of the blue light emitting element.

[0057] Optionally, the size of the green light emitting element is equal to the size of the blue light emitting element.

[0058] Optionally, the wiring layer includes pad wiring, and the pad wiring includes a first pad wiring, a second pad wiring, a third pad wiring and a fourth pad wiring, wherein the first pad wiring and the second pad wiring are arranged on both sides of the red light emitting element, and the third pad wiring and the fourth pad wiring are arranged on both sides of the blue light emitting element.

[0059] Optionally, the size of the green light emitting element is larger than that of the blue light emitting element.

[0060] Optionally, the red light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, the green light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, and the blue light emitting element is sequentially provided with a second electrode and a first electrode along the direction from the first side to the third side.

[0061] Optionally, the red light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, the green light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, and the blue light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side.

[0062] Optionally, the first electrode is a P electrode, and the second electrode is an N electrode.

[0063] Optionally, the centers of the red and green light-emitting elements are aligned, and the center of the blue light-emitting element is offset in the direction of the first side relative to the center of the green light-emitting element. Because a light-emitting area exists below the P-electrode of the light-emitting diode, the entire blue light-emitting element is shifted in the direction of the first side. That is, under normal circumstances, the centers of the three light-emitting elements are aligned. In this embodiment, the center of the blue light-emitting element is offset in the direction of the first side relative to the center of the green light-emitting element. This can center the light-emitting area of ​​the blue light-emitting element, increase the light-emitting area of ​​the light-emitting area, and further increase the light extraction efficiency of the blue light-emitting element, thereby achieving a better light extraction effect without changing the overall size of the light-emitting device.

[0064] Optionally, along the direction from the first side to the third side, each light-emitting element includes a first end and a second end, the distance D3 between the first end of the blue light-emitting element and the first end of the green light-emitting element is 0 to 20 μm, and the distance D5 between the second end of the blue light-emitting element and the second end of the green light-emitting element is 0 to 20 μm.

[0065] Optionally, the wiring layer also includes connecting wiring, the first pad wiring is connected to the first electrode of the red light emitting element, the first electrode of the green light emitting element and the first electrode of the blue light emitting element through the connecting wiring; the second pad wiring is connected to the second electrode of the red light emitting element through the connecting wiring, the third pad wiring is connected to the second electrode of the green light emitting element through the connecting wiring, and the fourth pad wiring is connected to the second electrode of the blue light emitting element through the connecting wiring.

[0066] Optionally, a distance D4 between an edge of the electrode of the blue light emitting element adjacent to the third pad wiring and an edge of the third pad wiring in a direction from the first side to the third side is greater than 5 μm.

[0067] Optionally, the absolute value of the difference between the distance D2 between the edge of the blue light emitting element and the fourth side of the transparent layer and the distance D1 between the edge of the red light emitting element and the second side of the transparent layer is less than 20 μmnm, which can prevent color difference and ensure good light output effect.

[0068] Optionally, the red light emitting element, the green light emitting element and the blue light emitting element are arranged in sequence along a direction from the second side to the fourth side of the transparent layer.

[0069] Optionally, the lighting device further includes:

[0070] The filling layer is filled between adjacent light-emitting elements.

[0071] Optionally, the filling layer contains a black filling component, and the black filling component includes at least one of carbon black, titanium nitride, iron oxide, ferrosoferric oxide or iron powder.

[0072] Optionally, the wiring layer includes:

[0073] The first layer is in contact with the light-emitting element and the filling layer, and is electrically connected to the light-emitting element;

[0074] The second layer has one side electrically connected to the first layer.

[0075] Optionally, the lighting device further includes:

[0076] The adhesive layer is arranged above the transparent layer, and the three light emitting elements are arranged on the adhesive layer at intervals.

[0077] Optionally, the lighting device further includes:

[0078] A plurality of protection electrodes are formed on the wiring layer at intervals and are electrically connected to the wiring layer.

[0079] This embodiment further provides a display device, including:

[0080] display substrate;

[0081] At least one light emitting device is disposed on the surface of the display substrate. The light emitting device is electrically connected to the display substrate. The light emitting device is the above-mentioned light emitting device.

[0082] The present invention is described in detail below with reference to specific embodiments.

[0083] Example 1

[0084] This embodiment provides a light emitting device, referring to Figure 1 The light emitting device includes a transparent layer 100 , three light emitting elements, a wiring layer 500 and an insulating layer 700 .

[0085] Reference Figure 1 , the transparent layer 100 may have a light transmittance of more than 60% in the visible light range. Optionally, the transparent layer 100 may be a transparent substrate, which may be a light-transmitting substrate such as PET, glass, quartz, sapphire, or transparent ceramic. The light-emitting device needs to have a certain thickness for easy use by the client, so the thickness of the transparent layer 100 is preferably greater than 10μm, specifically preferably 30μm to 50μm, 50μm to 100μm, or 100μm to 300μm. A plurality of light-emitting elements are provided on the surface of the transparent layer 100. The side of the transparent layer 100 away from the light-emitting element is the light-emitting surface of the light-emitting device, that is, the light emitted by the light-emitting element is emitted outward through the transparent layer 100. In this embodiment, the transparent layer 100 includes a first side 01, a second side 02, a third side 03, and a fourth side 04 connected in sequence, wherein the fourth side 04 is connected to the first side 01.

[0086] Three light-emitting elements are disposed on the transparent layer 100, including a first light-emitting element, a second light-emitting element, and a third light-emitting element along the direction from the second side 02 to the fourth side 04 of the transparent layer 100. Each light-emitting element emits a different light color, and at least one light-emitting element is smaller than any other light-emitting element. In this embodiment, the first light-emitting element is a red light-emitting element 401, the second light-emitting element is a green light-emitting element 402, and the third light-emitting element is a blue light-emitting element 403.

[0087] Optionally, refer to Figure 3Since different light-emitting elements usually have different thicknesses, an adhesive layer 200 is provided between the transparent layer 100 and the light-emitting element, wherein the material of the adhesive layer 200 can be an elastic material such as silicone. Therefore, the light-emitting element will be partially sunken into the adhesive layer 200 to keep the electrode surface of the light-emitting element at the same level, and the height difference of the light-emitting surface of each light-emitting element can be reduced, so that the light emitted from the side of the light-emitting element is absorbed as much as possible by the filling layer 300 described below, so as to improve the contrast of the light-emitting device. The thickness of the adhesive layer 200 is preferably 1μm to 15μm or 3μm to 10μm. If the thickness of the adhesive layer 200 is greater than 15μm, the alignment accuracy of the light-emitting element may be affected.

[0088] The light-emitting element in this embodiment mainly refers to a micron-sized light-emitting diode, whose width or length ranges from 2 to 5 μm, 5 to 10 μm, 10 to 20 μm, 20 to 50 μm or 50 to 100 μm, and its thickness ranges from 2 to 15 μm, preferably 5 to 10 μm.

[0089] Specifically, each light-emitting element includes a semiconductor stack layer, and the semiconductor stack layer may include a first semiconductor layer, a second semiconductor layer, and an active layer arranged in sequence therebetween, wherein the first semiconductor layer is an N-type semiconductor layer, the second semiconductor layer is a P-type semiconductor layer, and the active layer is a multi-layer quantum well layer, which can provide red light, green light, or blue light radiation. The N-type semiconductor layer, the multi-layer quantum well layer, and the P-type semiconductor layer are only the basic constituent units of the light-emitting element. On this basis, the light-emitting element may also include other functional structural layers that have an optimizing effect on the performance of the light-emitting element. In this embodiment, referring to Figure 1 The three light-emitting elements include a first light-emitting element, a second light-emitting element and a third light-emitting element in sequence along the direction from the second side 02 to the fourth side 04 of the transparent layer 100, wherein the first light-emitting element is a red light-emitting element 401, the second light-emitting element is a green light-emitting element 402, and the third light-emitting element is a blue light-emitting element 403.

[0090] Optionally, refer to Figure 3A filling layer 300 is provided between adjacent light-emitting elements or around the side walls of the light-emitting elements. The provision of the filling layer 300 can prevent color mixing or light interference between adjacent light-emitting elements, thereby improving the contrast of the light-emitting device. The filling layer 300 is provided as a black glue layer that absorbs light. Specifically, the filling layer 300 can be a component formed by dispersing a black filling component with a particle size not greater than 1 μm in a transparent or translucent material such as silica gel, epoxy resin, polyimide, low-temperature glass, polysiloxane, polysilazane, etc. The black filling component in the filling layer 300 includes but is not limited to carbon black, titanium nitride, iron oxide, ferroferric oxide, iron powder, etc. The particle size range of the black filling component is preferably 10 to 100 nm, or 100 to 200 nm, or 200 to 300 nm, or 300 nm to 500 nm. The filling layer 300 can also be made of a black dye.

[0091] Reference Figure 3 The wiring layer 500 is disposed above the three light-emitting elements and the filling layer 300 and electrically connects to each light-emitting element via metal wiring within it. The wiring layer 500 includes a plurality of wirings, and the periphery of the wiring layer 500 is filled with an insulating layer 700 to electrically isolate adjacent wirings. The wiring layer 500 can be a single layer or multiple layers made of at least one material selected from titanium, copper, chromium, nickel, gold, platinum, aluminum, titanium nitride, tantalum nitride, or tantalum. In this embodiment, the wiring layer 500 comprises a two-layer structure, specifically a first layer 501 and a second layer 502. The first layer 501 is in direct contact with the light-emitting elements, and the second layer 502 is formed above the first layer 501. The first layer 501 is used to adhere the second layer 502 to the light-emitting elements and the filling layer 300, and the second layer 502 primarily serves as a conductor. The materials of the first layer 501 include, but are not limited to, one or more of titanium, nickel, titanium nitride, tantalum nitride, or tantalum, while the materials of the second layer 502 include, but are not limited to, one or more of copper, aluminum, or gold. The wiring layer 500 can be prepared by sputtering, evaporation, or the like.

[0092] Reference Figure 1 The wiring layer 500 includes pad wiring, which includes a first pad wiring 510, a second pad wiring 520, a third pad wiring 530, and a fourth pad wiring 540. The first pad wiring 510 and the second pad wiring 520 are disposed on both sides of the red light emitting element 401. The third pad wiring 530 and the fourth pad wiring 540 are disposed on both sides of the blue light emitting element 403.

[0093] Reference Figure 3The insulating layer 700 is formed on the wiring layer 500, and a portion of the insulating layer 700 can be removed by exposure and development, thereby exposing a portion of the surface of the wiring layer 500. The insulating layer 700 can be formed of a material such as epoxy resin, polysiloxane, or photoresist, and can oxidize the surface of the wiring layer 500 and electrically isolate different wirings to prevent leakage failure of the light-emitting device.

[0094] Optionally, refer to Figure 1 and 4 A protective electrode is also formed on the portion of the wiring layer 500 exposed by the insulating layer 700. When the material forming the wiring layer 500 is easily oxidized, for example, in some embodiments, when the surface metal of the wiring layer 500 is Cu, the protective electrode formed on the exposed wiring layer 500 can protect the exposed wiring layer 500. In this embodiment, the protective electrodes include a first protective electrode 601, a second protective electrode 602, a third protective electrode 603, and a fourth protective electrode 604. The first protective electrode 601 is formed on the first pad wiring 510, the second protective electrode 602 is formed on the second pad wiring 520, the third protective electrode 603 is formed on the third pad wiring 530, and the fourth protective electrode 604 is formed on the fourth pad wiring 540.

[0095] Because the light-emitting device or unit pixel package in the prior art contains three light-emitting elements with different light-emitting colors, the light-emitting elements of the same size have different light outputs, resulting in a substandard light color ratio, which in turn affects the brightness of the entire unit pixel. In addition, it is difficult to brighten a single chip. If the number of light-emitting elements in a unit pixel is increased to increase the light output of a certain light color, the overall area of ​​the unit pixel will increase, which is not conducive to the miniaturization of the device. To solve this technical problem, the present embodiment sets the size of the chips of different light-emitting colors of the light-emitting device so that the size of the light-emitting device itself will not be increased while achieving the color ratio and ensuring the performance of the light-emitting device itself.

[0096] Specifically, in this embodiment, referring to Figure 1 , the size of the red light emitting element 401 is smaller than that of the green light emitting element 402, and the size of the red light emitting element 401 is smaller than that of the blue light emitting element 403. As a result, the light output brightness of the green light emitting element 402 and the blue light emitting element 403 can be improved, so that the light output brightness of the entire light emitting device can achieve a better effect. In addition, since the size of the blue light emitting element is increased, the antistatic ability of the blue light emitting element can also be further improved. Among them, the size of the green light emitting element 402 can be greater than or equal to the size of the blue light emitting element 403.

[0097] In one embodiment, referring to Figure 1, the size of the green light emitting element 402 is equal to the size of the blue light emitting element 403. That is, the size of the green light emitting element 402 and the size of the blue light emitting element 403 are enlarged at the same ratio relative to the red light emitting element 401. In addition, because solder pads are provided on both sides of the blue light emitting element 403, the solder pads on both sides will limit the increase in the area of ​​the blue light emitting element 403. To ensure the overall size of the light emitting device, the position of the solder pads is generally not changed, and the area of ​​the blue light emitting element 403 is increased as much as possible. As a result, the size of the green light emitting element 402 may be larger than that of the blue light emitting element 403, but the size difference between the two is not very large.

[0098] Each light-emitting element further includes a first electrode 410 and a second electrode 420. The semiconductor stack of the light-emitting element has a mesa exposing the first semiconductor layer, the first electrode 410 is formed on the mesa and electrically connected to the first semiconductor layer, and the second electrode 420 is formed on the second semiconductor layer and electrically connected to the second semiconductor layer.

[0099] In one embodiment, referring to Figure 1The red light-emitting element 401 is provided with a first electrode 410 and a second electrode 420 in sequence along the direction from the first side 01 to the third side 03. The green light-emitting element 402 is provided with a first electrode 410 and a second electrode 420 in sequence along the direction from the first side 01 to the third side 03. The blue light-emitting element 403 is provided with a second electrode 420 and a first electrode 410 in sequence along the direction from the first side 01 to the third side 03. In this case, the connecting wiring 550 sequentially connects the first electrode 410 of the red light-emitting element 401, the first electrode 410 of the green light-emitting element 402, and the first electrode 410 of the blue light-emitting element 403 along the direction from the second side 02 to the fourth side 04. Because the first electrode 410 and the second electrode 420 of the blue light-emitting element 403 are located opposite to the other two light-emitting elements, the connecting wiring 550 has a corner when connecting to the blue light-emitting element 403. Furthermore, in this embodiment, the first electrode 410 is a P electrode, and the second electrode 420 is an N electrode. Because there is a light-emitting area below the P-electrode of the LED, the entire blue light-emitting element 403 is shifted toward the first side 01. That is, under normal circumstances, the centers of the three light-emitting elements are aligned. In this embodiment, the center of blue light-emitting element 403 is offset toward the first side 01 relative to the center of green light-emitting element 402. This makes the light-emitting area of ​​blue light-emitting element 403 bilaterally symmetrical, increases the distance between the electrode of the blue light-emitting element and the adjacent pad wiring, reduces the risk of short circuits, and achieves better light output without changing the overall size of the light-emitting device, thereby ensuring the yield of the light-emitting device. Optionally, along the direction from the first side 01 to the third side 03, each light-emitting element includes a first end and a second end. The distance D3 between the first end of blue light-emitting element 403 and the first end of green light-emitting element 402 is 0 to 20 μm, and the distance D5 between the second end of blue light-emitting element 403 and the second end of green light-emitting element 402 is 0 to 20 μm. A distance D4 between the edge of the electrode of the blue light emitting element 403 adjacent to the third pad wiring 530 and the edge of the third pad wiring 530 in the direction from the first side 01 to the third side 03 is greater than 5 μm.

[0100] Optionally, refer to Figure 1 The absolute value of the difference between the distance D2 between the edge of the blue light emitting element 403 and the fourth side 04 of the transparent layer 100 and the distance D1 between the edge of the red light emitting element 401 and the second side 02 of the transparent layer 100 is less than 20 μm. This can prevent color difference and ensure good light output. Optionally, D1 can be equal to D2, and D1 and D2 are between 15 and 50 μm.

[0101] In another embodiment, referring to Figure 2The red light-emitting element 401 is provided with a first electrode 410 and a second electrode 420 in sequence along the direction from the first side 01 to the third side 03. The green light-emitting element 402 is provided with a first electrode 410 and a second electrode 420 in sequence along the direction from the first side 01 to the third side 03. The blue light-emitting element 403 is provided with a first electrode 410 and a second electrode 420 in sequence along the direction from the first side 01 to the third side 03. In this case, the connection wiring 550 sequentially connects the first electrode 410 of the red light-emitting element 401, the first electrode 410 of the green light-emitting element 402, and the first electrode 410 of the blue light-emitting element 403 along the direction from the second side 02 to the fourth side 04. Because the first electrode 410 and the second electrode 420 of each light-emitting element are arranged in the same direction, the connection wiring 550 has no corners.

[0102] In this embodiment, referring to Figure 1 , the red light emitting element 401, the green light emitting element 402, and the blue light emitting element 403 are sequentially arranged along the direction from the second side 02 to the fourth side 04 of the transparent layer 100. In other embodiments, the light emitting elements can be arranged at any position on the transparent layer 100, and the present invention does not limit the position of the light emitting elements on the transparent layer 100.

[0103] Example 2

[0104] This embodiment provides a display device, referring to Figure 5 The display device includes a display substrate 002 and at least one light-emitting device 001 formed on the display substrate 002. The light-emitting device can be electrically connected to the display substrate 002 by fixing the wiring layer with solder paste or other means, or a protective electrode can be formed on the wiring layer and then fixed to the display substrate 002 with solder paste or other means to form an electrical connection. The light-emitting device is the light-emitting device in the above-mentioned embodiment 1 and similarly has the above-mentioned technical effects.

[0105] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A light emitting device, characterized in that: include: A transparent layer comprising a first side, a second side, a third side, and a fourth side connected in sequence, wherein the fourth side is connected to the first side; three light-emitting elements, including a first light-emitting element, a second light-emitting element, and a third light-emitting element in sequence along the direction from the second side to the fourth side, the first light-emitting element being a red light-emitting element, the second light-emitting element being a green light-emitting element, and the third light-emitting element being a blue light-emitting element, the red light-emitting element being smaller than the green light-emitting element, the red light-emitting element being smaller than the blue light-emitting element, and the green light-emitting element being larger than the blue light-emitting element; a wiring layer disposed above the three light-emitting elements, the wiring layer being electrically connected to each of the light-emitting elements, the wiring layer including pad wiring, the pad wiring including a first pad wiring, a second pad wiring, a third pad wiring, and a fourth pad wiring, wherein the first pad wiring and the second pad wiring are disposed on both sides of the red light-emitting element, and the third pad wiring and the fourth pad wiring are disposed on both sides of the blue light-emitting element; The insulating layer is arranged on a portion of the wiring layer.

2. The light emitting device according to claim 1, wherein The red light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, the green light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, and the blue light emitting element is sequentially provided with a second electrode and a first electrode along the direction from the first side to the third side.

3. The light emitting device according to claim 1, wherein The red light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, the green light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side, and the blue light emitting element is sequentially provided with a first electrode and a second electrode along the direction from the first side to the third side.

4. The light emitting device according to claim 2, wherein: The first electrode is a P electrode, and the second electrode is an N electrode.

5. The light emitting device according to claim 1 or 3, characterized in that: The centers of the red light emitting element and the green light emitting element are aligned, and the center of the blue light emitting element is offset in the direction of the first side relative to the center of the green light emitting element.

6. The light emitting device according to claim 1 or 3, characterized in that: Along the direction from the first side to the third side, each of the light-emitting elements includes a first end and a second end, a distance D3 between the first end of the blue light-emitting element and the first end of the green light-emitting element is 0~20μm, and a distance D5 between the second end of the blue light-emitting element and the second end of the green light-emitting element is 0~20μm.

7. The light emitting device according to claim 2 or 3, characterized in that: The wiring layer also includes connecting wiring, the first pad wiring is connected to the first electrode of the red light emitting element, the first electrode of the green light emitting element and the first electrode of the blue light emitting element through the connecting wiring; the second pad wiring is connected to the second electrode of the red light emitting element through the connecting wiring, the third pad wiring is connected to the second electrode of the green light emitting element through the connecting wiring, and the fourth pad wiring is connected to the second electrode of the blue light emitting element through the connecting wiring.

8. The light emitting device according to claim 4, wherein: A distance D4 between an edge of an electrode of the blue light emitting element adjacent to the third pad wiring and an edge of the third pad wiring in a direction from the first side to the third side is greater than 5 μm.

9. The light emitting device according to claim 1, wherein: An absolute value of a difference between a distance D2 between an edge of the blue light emitting element and the fourth side of the transparent layer and a distance D1 between an edge of the red light emitting element and the second side of the transparent layer is less than 20 μm.

10. The light emitting device according to claim 1, wherein The light emitting device further comprises: A filling layer is filled between adjacent light-emitting elements. The filling layer contains a black filling component, and the black filling component includes at least one of carbon black, titanium nitride, iron oxide or iron powder.

11. The light emitting device according to claim 10, characterized in that The wiring layer includes: The first layer is adhered to the light emitting element and the filling layer, and is electrically connected to the light emitting element; The second layer has one side electrically connected to the first layer.

12. The light emitting device according to claim 1, wherein The light emitting device further comprises: an adhesive layer, disposed above the transparent layer, wherein the three light-emitting elements are spaced apart from each other on the adhesive layer; A plurality of protection electrodes are formed on the wiring layer at intervals and are electrically connected to the wiring layer.

13. A display device, characterized in that: include: display substrate; At least one light-emitting device is disposed on a surface of the display substrate, the light-emitting device being electrically connected to the display substrate, and the light-emitting device is the light-emitting device according to any one of claims 1 to 12.

Images