CN213458829U - Quantum dot LED display screen - Google Patents
Quantum dot LED display screen Download PDFInfo
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- CN213458829U CN213458829U CN202022524955.0U CN202022524955U CN213458829U CN 213458829 U CN213458829 U CN 213458829U CN 202022524955 U CN202022524955 U CN 202022524955U CN 213458829 U CN213458829 U CN 213458829U
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Abstract
The utility model discloses a quantum dot LED display screen, which comprises a PCB circuit board, wherein welding pads are uniformly arranged on the PCB circuit board, and LED lamp beads with single color are arranged on each welding pad in a COB packaging mode; the surface of each LED lamp bead is provided with a transparent protective adhesive layer, and a light-isolating grid layer is arranged between the transparent protective adhesive layers and separates each LED lamp bead; the transparent protective adhesive layer is provided with a quantum dot film corresponding to the LED lamp beads, and the colors of three adjacent LED lamp beads are converted into red, green and blue through the quantum dot film, or the colors of four adjacent LED lamp beads are converted into red, green, blue and yellow or red, green and blue; four or three adjacent LED lamp pearls mix the light and combine and form a pixel unit. Because only adopt the LED lamp pearl of single colour, the production degree of difficulty and cost also greatly reduced, the optical wavelength range that the quantum dot produced is very narrow to solved the impure problem of screen color that ordinary COB can't the beam split colour separation brought, LED display screen shows that the quality obtains the promotion of matter.
Description
Technical Field
The utility model relates to a LED display screen technical field, in particular to quantum dot LED display screen.
Background
The LED display screen is an electronic display screen formed by LED lattices, the display content forms of the screen, such as characters, animations, pictures and videos, are changed in time by lightening and extinguishing red, green and blue lamp beads, the display of components is controlled by a modular structure, and the LED display screen is mainly divided into a display module, a control system and a power supply system. The display module is a screen consisting of LED lamp dot arrays and emits light; the control system realizes the conversion of the content displayed on the screen under the on-off condition in the regulation area; the power supply system converts the input voltage and current to meet the requirement of the display screen. The LED screen can realize conversion between different forms of multiple information presentation modes, can be used indoors and outdoors, and has incomparable advantages compared with other display screens. The novel LED lamp is developed rapidly and widely applied to various fields by virtue of the characteristics of high brightness intensity, low work power consumption, low voltage requirement, small and exquisite equipment, convenience, long service life, impact resistance, stability and strong external interference resistance.
LED display screen is towards high density booth apart from development, its density is bigger and bigger, and the interval between the pixel is more and more little, and current SMD table pastes the mode and has met the difficulty, adopts COB (chip on board) can solve LED lamp pearl can't do littleer, also can't produce the technical defect of processing LED display screen through SMD's mode, and COB encapsulation is exactly with electrically conductive or non-conductive sticky the adhesion on interconnection base plate with naked lamp pearl, then carries out lead bonding and realizes its electrical connection. If the naked lamp bead is directly exposed in the air, the lamp bead is easy to be polluted or damaged by people, the function of the lamp bead is affected or destroyed, and then the lamp bead and the bonding lead are encapsulated by glue. However, if the existing mode of integrating three RGB lamp beads together to form one pixel is adopted, the requirements on the wiring and production processes of the circuit board are very high.
LED display screen is towards high density booth apart from development, its density is bigger and bigger, and the interval between the pixel is more and more little, and current SMD table pastes the mode and has met the difficulty, adopts COB (chip on board) can solve LED lamp pearl can't do littleer, also can't produce the technical defect of processing LED display screen through SMD's mode, and COB encapsulation is exactly with electrically conductive or non-conductive sticky the adhesion on interconnection base plate with naked lamp pearl, then carries out lead bonding and realizes its electrical connection. However, the technical difficulty of the COB packaging method adopting the red, green and blue lamp beads is that light and color separation cannot be achieved, the optical characteristics of the COB display screen are determined by the wavelength characteristics of the LED lamp beads, the difficulty of chip-level light and color separation is high, the cost is high, and the COB process also has solid crystal wavelength offset. The COB display screen manufactured in the way is poor in chroma and unsatisfactory in display effect, correction can be performed only through the control system, the wavelength is a physical characteristic, the difficulty in correcting a color gamut is high, and the effect is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a quantum dot LED display screen, the LED display screen that aims at solving high pixel under the COB encapsulation is big at the lamp pearl level split color degree of difficulty, the poor technical problem of COB display screen chroma.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a quantum dot LED display screen comprises a PCB, wherein welding pads are uniformly arranged on the PCB, and LED lamp beads with single color are mounted on each welding pad in a COB (chip on board) packaging mode; the LED lamp bead surface is provided with transparent protection glue layers, and light-isolating grid layers are arranged between the transparent protection glue layers and separate each LED lamp bead; setting a quantum dot film on the transparent protective adhesive layer corresponding to the LED lamp beads, and converting the colors of three adjacent LED lamp beads into red, green and blue or converting the colors of four adjacent LED lamp beads into red, green, blue and yellow or red, green and blue; and four or three adjacent LED lamp beads are mixed and combined to form a pixel unit.
Further, the LED lamp beads are blue LED lamp beads, the blue light of at least one of the blue LED lamp beads in the four or three adjacent blue LED lamp beads is converted into narrow-band red light through the quantum dot film, the blue light of at least one of the blue LED lamp beads is converted into narrow-band green light, and the blue light of at least one of the blue LED lamp beads is converted into narrow-band blue light.
Further, the quantum dot film comprises a group of PET substrate layers, the quantum dot material layer is arranged between the PET substrate layers, and barrier material layers are arranged between the quantum dot material layer and the PET substrate layers respectively.
Furthermore, the PET substrate layer outside is provided with the micron structural layer of optics respectively, one of them side of PET substrate layer is in through the optical cement cover setting transparent protection glue layer surface.
Specifically, four adjacent LED lamp pearls or three LED lamp pearls of regularly arranging constitute a pixel unit on the PCB circuit board.
Furthermore, 2 adjacent pads on the PCB form a group, one of which is used for connecting the anode of the LED lamp bead, and the other is used for connecting the cathode of the LED lamp bead.
Furthermore, the LED lamp beads are installed on the PCB in a positive installation mode, and the PAD discs of the LED lamp beads are respectively connected with the positive pole and the negative pole of each group of the bonding PADs through a metal wire.
Further, the LED lamp beads are installed on the PCB in an inverted mode, and the PAD discs of the LED lamp beads are fixed on the positive electrode and the negative electrode of each group of bonding PADs through silver adhesive or solder paste respectively.
Adopt above-mentioned technical scheme, the utility model discloses quantum dot LED display screen adopts COB packaging mode to set up LED lamp pearl on the pad of PCB circuit board, binds the LED lamp pearl of a certain colour on every pad, and four adjacent or three LED lamp pearls (1 group) can become a pixel cell through the quantum dot membrane, and the colour combination can be red green blue, red green blue yellow or red green blue green. Utilize quantum dot can produce the characteristic of pure color, adopt the mode of COB, only need adopt the LED lamp pearl of single colour to produce three kinds of colours of pure red green blue, realize full-color LED display screen. Because only the LED lamp beads with single color are adopted, the production difficulty and the cost are greatly reduced, and the reliability is also greatly improved. The optical wavelength range that quantum dot produced is very narrow to solved the impure problem of screen color that ordinary COB can't the beam split colour separation brought, LED display screen shows that the quality obtains the promotion of matter.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a cross-sectional structure view of a quantum dot LED display screen according to an embodiment of the present invention;
fig. 2 is a front view structure diagram of a first quantum dot LED display screen according to an embodiment of the present invention;
fig. 3 is a front view structure diagram of a second quantum dot LED display screen according to an embodiment of the present invention;
fig. 4 is a front view structure diagram of the PCB circuit board according to the embodiment of the present invention;
FIG. 5 is a first diagram of a fixing manner of LED lamp beads on a PCB circuit board according to an embodiment of the present invention;
fig. 6 is a second structure diagram of a fixing mode of an LED lamp bead on a PCB of the embodiment of the present invention;
fig. 7 is a cross-sectional structural view of a quantum dot film according to an embodiment of the present invention;
fig. 8 is a color conversion state diagram of a first quantum dot film according to an embodiment of the present invention;
fig. 9 is a color conversion state diagram of a second quantum dot film according to an embodiment of the present invention;
in the figure, 10-PCB circuit board, 20-LED lamp beads, 30-transparent protective glue layer, 40-light-isolating grid layer, 50-quantum dot film, 60-bonding pad, 70-metal wire and 80-silver glue; 51-PET substrate layer, 52-barrier material layer, 53-quantum dot material layer, and 54-optical micron structure layer; 531G-wavelength band green light quantum dots, 531R-wavelength band red light quantum dots and 531B-wavelength band blue light quantum dots.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1-3, an embodiment of the present invention further provides a quantum dot LED display screen, which includes a PCB circuit board 10, wherein the PCB circuit board 10 is uniformly provided with bonding pads 60, and each bonding pad 60 is provided with a single-color LED lamp bead 20 in a COB packaging manner; the surface of each LED lamp bead 20 is provided with a transparent protective adhesive layer 30, light-isolating grid layers 40 are arranged between the transparent protective adhesive layers 30, and each LED lamp bead 20 is isolated by the light-isolating grid layers 40; arranging a quantum dot film 50 on the transparent protective adhesive layer 30 corresponding to the LED lamp beads 20, and converting the colors of the three adjacent LED lamp beads 20 into red, green and blue or converting the colors of the four adjacent LED lamp beads 20 into red, green, blue and yellow or red, green and blue green through the quantum dot film 50; four or three adjacent LED lamp beads 20 mix light and combine to form a pixel unit. Specifically, four adjacent LED lamp beads 20 or three regularly arranged LED lamp beads 20 on the PCB 10 form a pixel unit; adopt high-accuracy tool, cover highly uniform's transparent protection face on LED module surface, let LED lamp pearl and air isolated to protect LED lamp pearl. And then, manufacturing regular net-shaped grooves by adopting a high-precision mould die pressing or laser cutting or other high-precision close cutting methods, filling non-transparent materials in the grooves by using UV printing or other processes, separating each LED lamp bead, and enabling each LED lamp bead to form an independent columnar body to prevent light emitted by the LED lamp bead from interfering with adjacent LED lamp beads. Optionally, as shown in fig. 2 and 3, the LED lamp beads 20 are blue LED lamp beads, and the quantum dot film 50 converts blue light of at least one of the four or three adjacent blue LED lamp beads into narrow-band red light, converts blue light of at least one of the blue LED lamp beads into narrow-band green light, and converts blue light of at least one of the blue LED lamp beads into narrow-band blue light.
Specifically, the pads 60 arranged regularly are manufactured on the PCB 10, one blue LED bead 20 is bound to each pad 60, and three or four LED beads 20 are arranged in a group according to a certain rule. Then, transparent optical glue is adopted to cover the surface, and the LED lamp beads are isolated from the air to form a smooth protection surface. And then, manufacturing a net-shaped groove on the protective surface by adopting a mould pressing, laser cutting or other precise cutting modes to separate each LED lamp bead. And then, filling non-transparent materials in the grooves by adopting UV printing or other modes to separate each LED lamp bead, and preventing light emitted by the LED lamp beads from crosstalk to adjacent LED lamp beads. And manufacturing a corresponding quantum dot film to cover the surface of the LED display screen. The blue light emitted by one (or two) LED lamp beads is changed into pure red light after passing through the quantum dot film, the blue light emitted by one (or two) LED lamp beads is changed into pure green light after passing through the quantum dot film, and the blue light emitted by one LED lamp bead is changed into pure blue light after passing through the quantum dot film. Thus, based on the obtained three colors of red, green and blue, a full-color LED display screen can be formed.
As shown in fig. 7, the quantum dot film 50 includes a group of PET substrate layers 51 and a quantum dot material layer 53, the quantum dot material layer 53 is disposed between the PET substrate layers 51, and barrier material layers 52 are respectively disposed between the quantum dot material layer 53 and the PET substrate layers 51 on both sides.
Specifically, the optical micrometer structure layer 54 is respectively arranged on the outer side of the PET substrate layer 51, and one side of the PET substrate layer 51 is covered on the surface of the transparent protective adhesive layer 30 through optical cement.
As shown in fig. 8, each pixel unit on the PCB 10 corresponding to the quantum dot film 50 includes a wavelength band green light quantum dot 531G covering two blue LED lamp beads, and two blue LED lamp beads are disposed at an adjacent side, covering one blue LED lamp bead wavelength band red light quantum dot 531R, and covering one blue LED lamp bead wavelength band blue light quantum dot 531B.
As shown in fig. 9, each pixel unit on the PCB 10 corresponding to the quantum dot film 50 includes a wavelength band red light quantum dot 531R covering two blue LED lamp beads, two blue LED lamp beads are on opposite sides, a wavelength band green light quantum dot 531G covering one blue LED lamp bead, and a wavelength band blue light quantum dot 531B covering one blue LED lamp bead.
As shown in fig. 4, 2 adjacent pads 60 on the PCB 10 form a group, one of which is used for connecting the anode of the LED lamp bead 20, and the other is used for connecting the cathode of the LED lamp bead 20.
As shown in fig. 5, the LED lamp beads 20 are mounted on the PCB 10 in a forward mounting manner, and PAD PADs of the LED lamp beads 20 are respectively connected to the positive electrode and the negative electrode of each group of the PADs 60 through a metal wire 70.
As shown in fig. 6, the LED lamp beads 20 are mounted on the PCB 10 in an inverted manner, and PAD PADs of the LED lamp beads are fixed on the positive electrode and the negative electrode of each group of the PADs 60 by silver paste 80 or solder paste, respectively.
The utility model discloses quantum dot LED display screen adopts COB packaging mode to set up LED lamp pearl on the pad of PCB circuit board, binds the LED lamp pearl of a certain colour on every pad, and four adjacent or three LED lamp pearls (1 group) can become a pixel unit through the quantum dot membrane, and the colour combination can be red green blue, red green blue yellow or red green blue green. Utilize quantum dot can produce the characteristic of pure color, adopt the mode of COB, only need adopt the LED lamp pearl of single colour to produce three kinds of colours of pure red green blue, realize full-color LED display screen. Because only the LED lamp beads with single color are adopted, the production difficulty and the cost are greatly reduced, and the reliability is also greatly improved. The optical wavelength range that quantum dot produced is very narrow to solved the impure problem of screen color that ordinary COB can't the beam split colour separation brought, LED display screen shows that the quality obtains the promotion of matter.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "row", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for the convenience of describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present patent application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," "secured," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present patent application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Claims (7)
1. A quantum dot LED display screen is characterized by comprising a PCB, wherein the PCB is uniformly provided with bonding pads, and LED lamp beads with single color are mounted on each bonding pad in a COB packaging mode; the LED lamp bead surface is provided with transparent protection glue layers, and light-isolating grid layers are arranged between the transparent protection glue layers and separate each LED lamp bead; setting a quantum dot film on the transparent protective adhesive layer corresponding to the LED lamp beads, and converting the colors of three adjacent LED lamp beads into red, green and blue or converting the colors of four adjacent LED lamp beads into red, green, blue and yellow or red, green and blue; and four or three adjacent LED lamp beads are mixed and combined to form a pixel unit.
2. The quantum dot LED display screen of claim 1, wherein the LED lamp beads are blue LED lamp beads, and the blue light of at least one of the blue LED lamp beads in four or three adjacent blue LED lamp beads is converted into narrow-band red light through the quantum dot film, wherein the blue light of at least one of the blue LED lamp beads is converted into narrow-band green light, and the blue light of at least one of the blue LED lamp beads is converted into narrow-band blue light.
3. The quantum dot LED display screen of claim 2, wherein the quantum dot film comprises a group of PET substrate layers, quantum dot material layers are arranged between the PET substrate layers, and barrier material layers are respectively arranged between the quantum dot material layers and the PET substrate layers on two sides.
4. The quantum dot LED display screen of claim 3, wherein optical microstructure layers are respectively arranged on the outer sides of the PET substrate layers, and one side of the PET substrate layer is covered on the surface of the transparent protective adhesive layer through optical adhesive.
5. The quantum dot LED display screen of claim 1, wherein four adjacent LED lamp beads or three regularly arranged LED lamp beads on the PCB form a pixel unit.
6. The quantum dot LED display screen of claim 5, wherein the LED lamp beads are mounted on the PCB in a forward mounting manner, and the PAD PADs of the LED lamp beads are respectively connected with the positive electrode and the negative electrode of each group of the bonding PADs through a metal wire.
7. The quantum dot LED display screen of claim 5, wherein the LED lamp beads are mounted on the PCB in an inverted manner, and the PAD PADs of the LED lamp beads are respectively fixed on the positive electrode and the negative electrode of each group of the bonding PADs through silver paste or solder paste.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022524955.0U CN213458829U (en) | 2020-11-04 | 2020-11-04 | Quantum dot LED display screen |
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| CN202022524955.0U CN213458829U (en) | 2020-11-04 | 2020-11-04 | Quantum dot LED display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506520A (en) * | 2021-06-22 | 2021-10-15 | 安徽精卓光显技术有限责任公司 | LED transparent display screen without edge wiring and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506520A (en) * | 2021-06-22 | 2021-10-15 | 安徽精卓光显技术有限责任公司 | LED transparent display screen without edge wiring and production method thereof |
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