CN217485439U - Light-emitting element, backlight, and display device - Google Patents

Abstract

The embodiment of the utility model discloses light emitting component, backlight and display device. The light emitting element includes: the bracket is arranged on one side of the substrate; the bracket comprises a first cavity and a second cavity; the first light-emitting unit is arranged in the first cavity and comprises an ultraviolet light device, the ultraviolet light device is used for emitting ultraviolet light, the first light-emitting unit is used for emitting ultraviolet light, converting the ultraviolet light into red light and green light and emitting the red light and the green light; and the second light-emitting unit is connected with the first light-emitting unit, is arranged in the second cavity and is used for emitting long-wave blue light. The ultraviolet light which does not cause damage to human eyes in the light finally generated by the light-emitting element has the long-wave blue light which is beneficial to the human eyes, so that the damage of the ultraviolet light generated in the light-emitting element to the human eyes can be avoided, and the light-emitting element has the function of protecting the eyes.

Description

Light-emitting element, backlight, and display device

Technical Field

The embodiment of the utility model provides a relate to and show technical field, especially relate to a light emitting component, backlight and display device.

Background

Ultraviolet light refers to light in the visible light with wavelengths between 312 and 760nm, wherein the ultraviolet light with wavelengths between 312 and 450nm has extremely high energy and can penetrate the lens to the retina, causing atrophy and even death of retinal pigment epithelial cells, and if the light sensitive cells die under the irradiation of the ultraviolet light, the vision of the human eye is reduced or even completely lost, and the damage is irreversible. At present, the prior art can generate blue light by relying on ultraviolet light and generate red light and green light by excitation, so that the harm of the ultraviolet light to human eyeballs cannot be avoided. In order to solve the problem, the prior art adopts a mode of directly exciting the quantum dots or the fluorescent powder by the long-wave blue light to realize display, but the excitation efficiency of the long-wave blue light to the quantum dots or the fluorescent powder material is extremely low, so that the display efficiency of the whole display device is reduced, and the power consumption is increased.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a light emitting component, backlight and display device to avoid the inside shortwave blue light that produces of light emitting component to the injury of people's eye, realize that the light that light emitting component produced has the function of eyeshield to people's eye, can guarantee higher light conversion efficiency simultaneously, reduce light emitting device's whole consumption.

In a first aspect, an embodiment of the present invention provides a light emitting element, including:

the bracket is arranged on one side of the substrate; the bracket comprises a first cavity and a second cavity;

the first light-emitting unit is arranged in the first cavity and comprises an ultraviolet light device used for emitting ultraviolet light, the first light-emitting unit is used for emitting ultraviolet light, converting the ultraviolet light into red light and green light and emitting the red light and the green light;

and the second light-emitting unit is connected with the first light-emitting unit, is arranged in the second cavity and is used for emitting long-wave blue light.

Optionally, the first light emitting unit further includes:

the wavelength conversion layer is arranged on one side, far away from the substrate, of the ultraviolet light device and is filled in the first cavity, and the surface of one side, far away from the substrate, of the wavelength conversion layer is flush with one end, far away from the substrate, of the support; the wavelength conversion layer is used to convert ultraviolet light into red and green light.

Optionally, the material of the wavelength conversion layer comprises:

at least one of a red light quantum dot material and a green light quantum dot material.

Optionally, a second light emitting unit comprising:

the long-wave blue light device is used for emitting long-wave blue light;

the packaging adhesive layer is arranged on one side, away from the substrate, of the long-wave blue light device and fills the second cavity, and the surface of one side, away from the substrate, of the packaging adhesive layer is flush with one end, away from the substrate, of the support; the packaging adhesive layer is used for increasing the refractive index and the light transmittance of light emitted by the long-wave blue light device.

Optionally, the bracket comprises a first side wall, a second side wall and a third side wall, the first side wall and the third side wall are adjacent to form a first cavity; the second sidewall and the third sidewall abut to form a second cavity.

Optionally, the third sidewall is perpendicular to the base;

the included angle between the first side wall and the substrate is an obtuse angle, the orthographic projection of the opening of the first cavity far away from the substrate on the substrate covers the orthographic projection of the opening of the first cavity close to the substrate on the substrate;

the included angle between the second side wall and the substrate is an obtuse angle, the orthographic projection of the opening of the second cavity far away from the substrate on the substrate covers the orthographic projection of the opening of the second cavity close to the substrate on the substrate.

Optionally, the light emitting element further comprises an electrode;

the substrate comprises a through hole, and the electrode is arranged in the through hole of the substrate; the electrodes comprise a first electrode, a second electrode and a third electrode, and the first electrode, the second electrode and the third electrode are arranged in the same layer;

the first light-emitting unit is electrically connected with the first electrode and the second electrode through bonding wires respectively, and the second light-emitting unit is electrically connected with the second electrode and the third electrode through bonding wires respectively.

Optionally, the ultraviolet light device comprises an ultraviolet light diode chip, the ultraviolet light diode chip comprising a flip chip;

the long-wave blue light device comprises a long-wave blue light diode chip, and the long-wave blue light diode chip comprises a flip chip.

In a second aspect, embodiments of the present invention further provide a backlight, which includes a plurality of light emitting elements as in any one of the first aspects and a substrate;

the light-emitting element is arranged on one side of the substrate, and the substrate is used for driving the light-emitting element to emit light.

In a third aspect, embodiments of the present invention further provide a display device, which includes the light emitting element according to any one of the first aspect, or includes the backlight according to the second aspect.

The embodiment of the utility model provides a technical scheme can convert the ultraviolet ray into the first luminescence unit of red light and green glow through setting up in the first cavity of the support that sets up in basement one side, sets up the second luminescence unit that can produce the long wave blue light in the second cavity of support, and the light that can avoid first luminescence unit to send takes place the mixed light phenomenon with the light that the second luminescence unit sent in the inside of support. The first light-emitting unit is electrically connected with the second light-emitting unit, so that the first light-emitting unit and the second light-emitting unit can be ensured to emit light simultaneously. Compare the light emitting component of prior art this scheme can convert the ultraviolet ray harmful to human eyes that it produced into the red light and the green glow function harmless to human eyes through utilizing first luminescence unit to combine the function of the profitable long wave blue light of human body that the second luminescence unit can produce, thereby do not have the ultraviolet ray that causes the injury to human eyes in the light that makes light emitting component finally produced, have the profitable long wave blue light of human eyes, and then can avoid the ultraviolet ray that light emitting component produced to the injury of human eyes, make light emitting component have the function of eyeshield. The light emitting element has high efficiency of exciting red light and green light by ultraviolet light, so that the consumption of converting short-wave blue light into red light and green light by the light emitting element is reduced.

Drawings

Fig. 1 is a cross-sectional view of a structure of a light emitting device according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of another structure of a light emitting device according to an embodiment of the present invention;

fig. 3 is a top view of a structure of a light emitting device according to an embodiment of the present invention;

fig. 4 is a top view of another structure of a light emitting device according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of another structure of a light emitting device according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of a backlight according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another display device according to an embodiment of the present invention

Fig. 9 is a cross-sectional view of a display device according to an embodiment of the present invention.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model provides a light emitting component, figure 1 is the embodiment of the utility model provides a cross-sectional view of light emitting component's structure. As shown in fig. 1, the light emitting element includes: a substrate 110, a support 120 disposed at one side of the substrate 110; the holder 120 includes a first cavity and a second cavity; the first light emitting unit 130, the first light emitting unit 130 is disposed in the first cavity, the first light emitting unit 130 includes an ultraviolet light device 131, the ultraviolet light device 131 is configured to emit ultraviolet light, the first light emitting unit 130 is configured to emit ultraviolet light, convert the ultraviolet light into red light and green light, and emit the red light and the green light; and a second light emitting unit 140 connected to the first light emitting unit 130, wherein the second light emitting unit 140 is disposed in the second cavity, and the second light emitting unit 140 is configured to emit long-wave blue light.

Specifically, the light emitting element is a dual-lamp-bead element, wherein one lamp bead can generate blue light in basic three primary colors, and the other lamp bead can generate red light and green light in the three primary colors, so that the light emitting element can generate blue light, red light, green light and light of multiple colors generated by mixing three primary colors in different proportions. The light emitting device mainly includes a substrate 110, a support 120, a first light emitting unit 130, and a second light emitting unit 140. The substrate 110 is a carrier of the bracket 120, the first light emitting unit 130 and the second light emitting unit 140, the bracket 120 is disposed on one side of the substrate 110, and the bracket 120 has a structure including a first cavity and a second cavity. The first light emitting unit 130 may be separately disposed in the first cavity of the bracket 120, and the second light emitting unit 140 may be separately disposed in the second cavity of the bracket 120, so as to prevent the light emitted by the first light emitting unit 130 and the light emitted by the second light emitting unit 140 from being mixed inside the bracket 120. The first light emitting unit 130 is electrically connected to the second light emitting unit 140, thereby enabling the first light emitting unit 130 and the second light emitting unit 140 to be simultaneously driven to emit light. The first light emitting unit 130 includes an ultraviolet light device 131, and the ultraviolet light device 131 may emit ultraviolet light. The first light emitting unit 130 may convert the ultraviolet light emitted from the ultraviolet light device 131 into both red and green light, so that the first light emitting unit 130 finally emits the red and green light. Thereby, the first light emitting unit 130 may convert ultraviolet light generated by the ultraviolet light device 131 harmful to the human eye into red and green light harmless to the human eye. The second light emitting unit 140 may generate long-wave blue light, and the long-wave blue light generated by the second light emitting unit 140 has an effect of adjusting biological rhythm and has a certain beneficial effect on human sleep, emotion, memory, and the like. Therefore, the second light emitting unit 140 can generate a function of generating long-wavelength blue light beneficial to the human body. In conclusion, the light finally generated by the light-emitting element does not contain ultraviolet light which can cause damage to human eyes, and has long-wave blue light which is beneficial to the human eyes, so that the damage of the ultraviolet light generated by the light-emitting element to the human eyes can be avoided, and the light-emitting element has the function of protecting the eyes. In addition, the light emitting element excites red light and green light with ultraviolet light, which has higher excitation efficiency than red light and green light generated by excitation with long-wavelength blue light, thereby reducing the consumption of the light emitting element for converting short-wavelength blue light into red light and green light.

The embodiment of the utility model provides a technical scheme can convert the ultraviolet ray into the first luminescence unit of red light and green glow through setting up in the first cavity of the support that sets up in basement one side, sets up the second luminescence unit that can produce the long wave blue light in the second cavity of support, and the mixed light phenomenon takes place in the inside of support for the light that can avoid first luminescence unit to send and the light that the second luminescence unit sent. The first light-emitting unit is electrically connected with the second light-emitting unit, so that the first light-emitting unit and the second light-emitting unit can be ensured to emit light simultaneously. Compared with the light-emitting element in the scheme of the prior art, the light-emitting element has the functions of converting the ultraviolet light which is generated by the first light-emitting unit and harmful to human eyes into the red light and the green light which are harmless to human eyes by utilizing the first light-emitting unit, and the function of the long-wave blue light which is generated by the second light-emitting unit and beneficial to human bodies is combined, so that the ultraviolet light which is harmful to human eyes is not generated in the light finally generated by the light-emitting element, the long-wave blue light which is beneficial to human eyes is provided, the damage of the ultraviolet light generated by the light-emitting element to human eyes can be avoided, and the light-emitting element has the function of eye protection. The light emitting element has high efficiency of exciting red light and green light by ultraviolet light, so that the consumption of converting short-wave blue light into red light and green light by the light emitting element is reduced.

Optionally, with continued reference to fig. 1, the first light-emitting unit 130 further includes: the wavelength conversion layer 132 is arranged on one side, away from the substrate 110, of the ultraviolet light device 131, the wavelength conversion layer 132 fills the first cavity, and the surface of one side, away from the substrate 110, of the wavelength conversion layer 132 is flush with one end, away from the substrate 110, of the support 120; the wavelength conversion layer 132 serves to convert ultraviolet light into red and green light.

Specifically, the first light emitting unit 130 includes an ultraviolet light device 131 and a wavelength conversion layer 132. The wavelength conversion layer 132 is disposed on a side of the ultraviolet light device 131 far from the substrate 110, so that a surface of the side of the wavelength conversion layer 132 far from the substrate 110 is flush with one end of the bracket 120 far from the substrate 110, that is, the wavelength conversion layer 132 fills the first cavity where the first light emitting unit 130 is located, thereby ensuring that ultraviolet light emitted by the ultraviolet light device 131 can be totally incident into the wavelength conversion layer 132, further enabling the wavelength conversion layer 132 to totally convert all ultraviolet light emitted by the ultraviolet light device 131 into red light and green light, and thus avoiding the harm of light emitted by the first light emitting unit 130 to human eyes.

Alternatively, the material of the wavelength conversion layer may include: at least one of a red light quantum dot material and a green light quantum dot material.

Specifically, the particle size of the quantum dot material is nano-scale, electrons and holes are quantum confined, and a continuous energy band structure can be changed into a discrete energy level structure, so that the spectrum of light converted by the quantum dot material is very narrow, the color gamut is high, and the chromaticity is pure. The light converted by the quantum dot material has small light loss when passing through the optical filter, so that low-power display can be realized by the quantum dot material. The quantum dot material can excite green light and red light of partial wave bands by absorbing ultraviolet light of partial wave bands, can effectively improve the color gamut of a display screen, and meets the requirements of high-quality display application. The material of the wavelength conversion layer comprises at least one of a red light quantum dot material and a green light quantum dot material, and the composition type of the red light quantum dot material is AxMyEz. Wherein, the element A is one of Ba, Ag, Fe, In, Cd, Zn, Ga, Mg and Pb, the element M is one of S, Cl, O, As, N, P, Se, Te and Pb, and the element E is one of S, As, Se, O, Cl, Br and I. Wherein x is 0.3-2.0, y is 0.5-3.0, and z is 0-4.0. The preferable red light quantum dot material is one or two composite materials of cadmium selenide, indium phosphide and cesium triiodide plumbate. The composition type of the green light quantum dot material is AxMyEz. Wherein, the element A is one of Na, Fe, In, Cd, Zn, Ga, Mg, Pb and Cs, the element M is one of S, As, N, P, Se, Te, Ti, Zr and Pb, and the element E is one of S, As, Se, O, Cl, Br and I. Wherein x is 0.3-2.0, y is 0.5-3.0, and z is 0-4.0. The preferred green light quantum dot material is one or two of cadmium selenide and cesium lead bromide composite material.

In addition, the wavelength conversion layer is formed by mixing a red light wave conversion material, a green light wave conversion material, packaging glue and diffusion particles. The red light wave conversion material comprises a red light quantum dot material and a red light fluorescent powder material, and the green light wave conversion material comprises a green light quantum dot material and a green light fluorescent powder material. Thus, the material of the wavelength conversion layer is composed in three ways: 1) mixing the red light quantum dot material and the green light quantum dot material; 2) mixing the red light quantum dot material and the green light fluorescent powder material; 3) mixing the red light fluorescent powder material and the green light quantum dot material. Thereby, the wavelength conversion layer enables conversion of short-wave blue light into red and green light.

Specifically, the red phosphor material may include at least one of chlorosilicate, aluminate, oxynitride, nitride, and oxysulfide; the green phosphor material may include at least one of silicate, chlorosilicate, aluminate, nitride, tungstate, molybdate, and oxysulfide. Under the excitation of ultraviolet light emitted by an ultraviolet light device, the red light wave conversion material can emit red light with the peak wavelength of 610-660 nm and the half-wave width of less than 25 nm; the green light wave conversion material can emit green light with the peak wavelength of 520-540 nm and the half-wave width of less than 29nm under the excitation of ultraviolet light emitted by an ultraviolet light device. Therefore, the ultraviolet light device can excite red light and green light with high color gamut through the red light wave conversion material and the green light wave conversion material.

Fig. 2 is a cross-sectional view of another structure of a light emitting device according to an embodiment of the present invention. As shown in fig. 2, the second light emitting unit includes: a long-wave blue light device 141, the long-wave blue light device 141 being configured to emit long-wave blue light; the packaging adhesive layer 142 is arranged on one side, away from the substrate 110, of the long-wave blue light device 141, the packaging adhesive layer 142 fills the second cavity, and the surface of one side, away from the substrate 110, of the packaging adhesive layer 142 is flush with one end, away from the substrate 110, of the support 120; the encapsulating adhesive layer 142 is used to increase the refractive index and light transmittance of the light emitted from the long-wave blue light device 141.

Specifically, the second light emitting unit is composed of a long-wave blue light device 141 and an encapsulating adhesive layer 142. The encapsulation adhesive layer 142 is disposed on the side of the long-wave blue light device 141 far from the substrate 110, so that the surface of the side of the encapsulation adhesive layer 142 far from the substrate 110 is flush with the end of the support 120 far from the substrate 110, that is, the encapsulation adhesive layer 142 is filled in the second cavity where the second light emitting unit is located, thereby ensuring that the long-wave blue light emitted by the long-wave blue light device 141 can be totally emitted into the encapsulation adhesive layer 142, and further increasing the refractive index and the light transmittance of the light emitted by the long-wave blue light device 141 by using the encapsulation adhesive layer 142.

Alternatively, the material of the encapsulation glue layer may comprise at least one of silicone, acrylate or epoxy.

Among them, the silicone resin is a thermosetting polyorganosiloxane having a highly crosslinked structure, and is excellent in heat resistance, cold resistance, weather resistance, electrical insulation, hydrophobicity, releasing resistance, and the like. The acrylic ester has excellent mineral oil resistance and high-temperature oxidation resistance; the epoxy resin has good bonding strength and chemical resistance, so that the material of the packaging adhesive layer comprises at least one of silicone resin, acrylate or epoxy resin, and the light-emitting element has durability and reliability. In addition, the silicon resin, the acrylic ester or the epoxy resin are all transparent materials, so that the long-wave blue light device can be packaged and fixed, and the refractive index and the light transmittance of light rays emitted by the long-wave blue light device can be enhanced.

Fig. 3 is a top view of a structure of a light emitting device according to an embodiment of the present invention. As shown in fig. 2-3, the bracket 120 includes a first sidewall 121, a second sidewall 122 and a third sidewall 123, the first sidewall 121 and the third sidewall 123 being adjacent to each other to form a first cavity; the second sidewall 122 and the third sidewall 123 abut to form a second cavity.

Specifically, the first sidewall 121 and the third sidewall 123 are adjacent to form a first cavity, and the second sidewall 122 and the third sidewall 123 are adjacent to form a second cavity. The first cavity and the second cavity are formed by the third side wall 123, so that the first cavity and the second cavity are adjacent to each other, the space of the light emitting element is saved, and the electrical connection between the first light emitting unit 131 arranged in the first cavity and the second light emitting unit 141 arranged in the second cavity is simplified. In addition, the first cavity and the second cavity are adjacent to each other, so that light emitted by the first light-emitting unit 131 in the first cavity can be better mixed with light emitted by the second light-emitting unit 141 in the second cavity, and the color of light emitted by the light-emitting element finally is more uniform.

Alternatively, with continued reference to fig. 2-3, the third sidewall 123 is perpendicular to the base 110; an included angle between the first sidewall 121 and the substrate 110 is an obtuse angle, an orthographic projection of the opening of the first cavity far away from the substrate 110 on the substrate 110 covers the orthographic projection of the opening of the first cavity close to the substrate 110 on the substrate 110; the included angle between the second sidewall 122 and the base 110 is an obtuse angle, and the orthographic projection of the opening of the second cavity far away from the base 110 on the base 110 covers the orthographic projection of the opening of the second cavity close to the base 110 on the base 110.

Specifically, the third sidewall 123 is perpendicular to the substrate 110, an included angle between the first sidewall 121 and the substrate 110 is an obtuse angle, and an included angle between the second sidewall 122 and the substrate 110 is an obtuse angle. The area of the opening of the first cavity far away from the substrate 110 is larger than that of the opening of the first cavity adjacent to the substrate 110; the area of the opening of the second cavity far away from the base 110 is larger than the opening of the second cavity near the base 110. That is, the orthographic projection of the opening of the first cavity far away from the substrate 110 on the substrate 110 can cover the orthographic projection of the opening of the first cavity near the substrate 110 on the substrate 110; the orthographic projection of the opening of the second cavity far away from the base 110 on the base 110 covers the orthographic projection of the opening of the second cavity near the base 110 on the base 110. Therefore, the openings of the first and second cavities far from the substrate 110 are larger than the openings of the adjacent substrate 110, so that the amount of light emitted from the openings far from the substrate 110 by the first and second light emitting units 131 and 141 can be increased.

It should be noted that: fig. 3 is a diagram illustrating an exemplary shape of the opening of the first cavity far from the substrate 110, the opening of the second cavity far from the substrate 110, the opening of the first cavity near the substrate 110, and the opening of the second cavity near the substrate 110 of the light emitting element according to an embodiment of the present invention is a semi-ellipse. Fig. 4 is a top view of another structure of a light emitting device according to an embodiment of the present invention, and fig. 4 exemplarily shows that the first cavity of the another light emitting device is far from the opening of the substrate 110, the second cavity is far from the opening of the substrate 110, the first cavity is close to the opening of the substrate 110, and the second cavity is close to the opening of the substrate 110 and has a rectangular shape. The embodiment of the present invention does not limit the shape of the opening of the substrate 110 away from the first cavity, the opening of the substrate 110 away from the second cavity, the opening of the substrate 110 close to the first cavity, and the opening of the substrate 110 close to the second cavity of the light emitting device.

Fig. 5 is a cross-sectional view of another structure of a light emitting device according to an embodiment of the present invention. As shown in fig. 5, the light emitting element may further include an electrode; the substrate 110 includes a through hole, and the electrode is disposed in the through hole of the substrate 110; the electrodes include a first electrode 151, a second electrode 152 and a third electrode 153, and the first electrode 151, the second electrode 152 and the third electrode 153 are arranged in the same layer; the first light emitting unit 131 is electrically connected to the first and second electrodes 151 and 152 through bonding wires 160, and the second light emitting unit 141 is electrically connected to the second and third electrodes 152 and 153 through bonding wires 160.

Specifically, the light emitting element further includes electrodes, and the first light emitting unit 131 and the second light emitting unit 141 may communicate with the driving circuit through the electrodes. The substrate 110 includes a through hole, and an electrode may be formed by filling a conductive material in the through hole of the substrate 110. The substrate 110 includes three through holes, and the first electrode 151, the second electrode 152 and the third electrode 153 may be formed by filling conductive materials in the through holes of the substrate 110, respectively, and the first electrode 151, the second electrode 152 and the third electrode 153 are disposed in the same layer.

The first light emitting unit 131 may be electrically connected to the first and second electrodes 151 and 152, respectively, through bonding wires 160, and the second light emitting unit 141 may be electrically connected to the second and third electrodes 152 and 153, respectively, through bonding wires 160. The first light emitting unit 131 and the second light emitting unit 141 share the second electrode 152, and the first light emitting unit 131 and the second light emitting unit 141 are connected in series through the second electrode 152, thereby enabling the first light emitting unit 131 and the second light emitting unit 141 to be driven to emit light. The bonding wire 160 is made of a simple metal or alloy with the resistivity of less than 2 x 10-8 omega-m, and the preferable material of the bonding wire 160 is Au, Ag, Cu, Al, Fe and the alloy thereof. Accordingly, the first light emitting unit 131 and the second light emitting unit 141 are connected in series by the bonding wire 160, and thus the light emission ratios of the first light emitting unit 131 and the second light emitting unit 141 can be improved and the resistance loss can be reduced.

Optionally, the uv device comprises a uv diode chip comprising a flip chip; the long-wave blue light device comprises a long-wave blue light diode chip, and the long-wave blue light diode chip comprises a flip chip.

Illustratively, the ultraviolet light device may be an ultraviolet light diode chip, the material of the ultraviolet light diode chip is one or more of gallium phosphide, gallium arsenide or gallium nitride, and the wavelength range of ultraviolet light emitted by the ultraviolet light diode chip is 260nm to 380 nm. The long-wave blue light device can be a long-wave blue light diode chip, the material of the long-wave blue light diode chip is one or more of gallium phosphide, gallium arsenide or gallium nitride, and the wavelength range of the long-wave blue light emitted by the long-wave blue light diode chip is 460nm to 480 nm. In addition, the ultraviolet light diode chip can be a flip chip structure chip, and the long wave blue light diode chip can also be a flip chip structure chip, so that the ultraviolet light diode chip and the long wave blue light diode chip can have better large current impact resistance stability, heat dissipation performance and light output performance.

Fig. 6 is a cross-sectional view of a backlight according to an embodiment of the present invention. As shown in fig. 6, the backlight includes a plurality of light emitting elements 100 and a substrate 200; the light emitting element 100 is disposed on one side of the substrate 200, and the substrate 200 is used to drive the light emitting element 100 to emit light.

The substrate 200 is a carrier for supporting the plurality of light emitting elements 100, the substrate 200 is provided with a driving circuit, and the light emitting elements 100 are disposed on one side of the substrate 200. Alternatively, the light emitting element 100 may include an electrode, and the substrate 200 may be connected to the electrode of the light emitting element 100, so that the substrate 200 drives the light emitting element 100 to emit light through the electrode.

Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention, and fig. 8 is a schematic structural diagram of another display device according to an embodiment of the present invention. As shown in fig. 7 to 8, the display device includes the light emitting element 100 set forth in any of the embodiments described above, or includes the backlight 10 set forth in any of the embodiments described above.

In addition, fig. 9 is a cross-sectional view of a display device according to an embodiment of the present invention. As shown in fig. 9, the display device further includes a diffusion plate 300, a prism film 400, an ultraviolet light filter 500, and a liquid crystal panel 600, wherein the diffusion plate 300 is disposed on a surface of the backlight source away from the substrate, the prism film 400 is disposed on a surface of the diffusion plate 300 away from the backlight source, the ultraviolet light filter 500 is disposed on a surface of the prism film 400 away from the backlight source, and the liquid crystal panel 600 is disposed on a surface of the ultraviolet light filter 500 away from the backlight source. The diffusion plate 300 may diffuse light generated by the backlight source, the prism film 400 may increase a light-emitting rate of the backlight source, and the ultraviolet filter 500 may filter ultraviolet light generated by the backlight source. When light emitted from the backlight is emitted on the liquid crystal panel 600, the light can be displayed on the liquid crystal panel 600.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (9)

1. A light-emitting element characterized by comprising:

the bracket is arranged on one side of the substrate; the bracket comprises a first cavity and a second cavity;

the first light-emitting unit is arranged in the first cavity and comprises an ultraviolet light device, the ultraviolet light device is used for emitting ultraviolet light, the first light-emitting unit is used for emitting ultraviolet light, converting the ultraviolet light into red light and green light and emitting the red light and the green light;

and the second light-emitting unit is connected with the first light-emitting unit, is arranged in the second cavity and is used for emitting long-wave blue light.

2. The light-emitting element according to claim 1, wherein the first light-emitting unit further comprises:

the wavelength conversion layer is arranged on one side, far away from the substrate, of the ultraviolet light device, the wavelength conversion layer fills the first cavity, and the surface of one side, far away from the substrate, of the wavelength conversion layer is flush with one end, far away from the substrate, of the support; the wavelength conversion layer is used for converting the ultraviolet light into the red light and the green light.

3. The light-emitting element according to claim 1, wherein the second light-emitting unit comprises:

a long-wave blue light device for emitting long-wave blue light;

the packaging adhesive layer is arranged on one side, far away from the substrate, of the long-wave blue light device and fills the second cavity, and the surface of one side, far away from the substrate, of the packaging adhesive layer is flush with one end, far away from the substrate, of the support; the packaging adhesive layer is used for increasing the refractive index and the light transmittance of the light emitted by the long-wave blue light device.

4. The light-emitting element according to claim 1, wherein the support comprises a first sidewall, a second sidewall and a third sidewall, the first sidewall adjoining the third sidewall to form the first cavity; the second sidewall and the third sidewall abut to form the second cavity.

5. The light-emitting element according to claim 4, wherein the third side wall is perpendicular to the substrate;

an included angle between the first side wall and the substrate is an obtuse angle, the orthographic projection of the opening of the first cavity far away from the substrate on the substrate covers the orthographic projection of the opening of the first cavity close to the substrate on the substrate;

the included angle between the second side wall and the base is an obtuse angle, the second cavity is far away from the orthographic projection of the opening of the base on the base, and the orthographic projection of the opening of the second cavity adjacent to the base on the base is covered.

6. The light-emitting element according to claim 1, wherein the light-emitting element further comprises an electrode;

the substrate comprises a through hole, and the electrode is arranged in the through hole of the substrate; the electrodes comprise a first electrode, a second electrode and a third electrode, and the first electrode, the second electrode and the third electrode are arranged in the same layer;

the first light-emitting unit is electrically connected with the first electrode and the second electrode through bonding wires respectively, and the second light-emitting unit is electrically connected with the second electrode and the third electrode through the bonding wires respectively.

7. The light-emitting element according to claim 3, wherein the ultraviolet light device comprises an ultraviolet light diode chip, the ultraviolet light diode chip comprising a flip-chip structure chip;

the long-wave blue light device comprises a long-wave blue light diode chip, and the long-wave blue light diode chip comprises a flip chip.

8. A backlight comprising a plurality of the light-emitting element according to any one of claims 1 to 7 and a substrate;

the light-emitting element is arranged on one side of the substrate, and the substrate is used for driving the light-emitting element to emit light.

9. A display device comprising the light-emitting element according to any one of claims 1 to 7 or comprising the backlight according to claim 8.

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