CN212322613U - LED display screen based on persistence of vision - Google Patents
LED display screen based on persistence of vision Download PDFInfo
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- CN212322613U CN212322613U CN202021450225.4U CN202021450225U CN212322613U CN 212322613 U CN212322613 U CN 212322613U CN 202021450225 U CN202021450225 U CN 202021450225U CN 212322613 U CN212322613 U CN 212322613U
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Abstract
The utility model discloses a LED display screen based on persistence of vision, which comprises a PCB circuit board, wherein the PCB circuit board is uniformly provided with bonding pads, and each bonding pad is provided with a single-color LED lamp bead in a COB packaging mode; a control driving module is integrated on the PCB and drives four adjacent LED lamp beads in a time division multiplexing mode, and the color combination of the four LED lamp beads is red, green and blue, red, green and blue yellow or red, green and blue green; and four adjacent LED lamp beads are mixed and combined to form a pixel unit. The control driving module controls four adjacent LED lamp beads to continuously mix light to form a new pixel unit in a time division multiplexing mode, and the pixels displayed by the LED display screen are 4 times that of physical pixels by utilizing the characteristic that human vision stays. Like this, the LED display screen can reduce cost, reduces COB's cost simultaneously.
Description
Technical Field
The utility model relates to a LED display screen technical field, in particular to LED display screen based on persistence of vision.
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.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a LED display screen based on persistence of vision, aim at solving LED display screen circuit board wiring of high pixel under the COB encapsulation complicated, the big technical problem of the production technology degree of difficulty.
In order to solve the technical problem, the technical scheme of the utility model as follows:
an LED display screen based on persistence of vision 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; a control driving module is integrated on the PCB and drives four adjacent LED lamp beads in a time division multiplexing mode, and the color combination of the four LED lamp beads is red, green and blue, red, green and blue yellow or red, green and blue green; and four adjacent LED lamp beads are mixed and combined to form a pixel unit.
Furthermore, four adjacent bonding pads on the PCB form a group, one of the two adjacent bonding pads is used for connecting the anode of the LED lamp bead, and the other bonding pad 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.
Furthermore, a hemisphere colloid is arranged on each corresponding LED lamp bead, and a sealing glue layer is arranged on each hemisphere colloid.
Further, be provided with UV on the sealant layer and print the net layer UV prints and is provided with dull polish atomization processing layer between the net layer.
Adopt above-mentioned technical scheme, the utility model discloses LED display screen based on persistence of vision 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 the LED lamp pearl of a plurality of colours is regular arranges, and the colour combination can be red green blue, red green blue yellow or red green blue green. Four adjacent LED lamp pearls (1 group) can make up into a pixel unit through mixing the light. The control driving module controls four adjacent LED lamp beads to continuously mix light to form a new pixel unit in a time division multiplexing mode, and the pixels displayed by the LED display screen are 4 times that of physical pixels by utilizing the characteristic that human vision stays. Like this, the LED display screen can reduce cost, reduces COB's cost simultaneously.
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 an LED display screen according to an embodiment of the present invention;
fig. 2 is a main view structure diagram of the LED display screen according to the embodiment of the present invention;
fig. 3 is a front view structure diagram of the PCB circuit board according to the embodiment of the present invention;
fig. 4 is a first structure diagram of a fixing mode of an LED lamp bead on a PCB of the embodiment of the present invention;
FIG. 5 is a second 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 first state diagram illustrating a change of a pixel unit of an LED display panel according to an embodiment of the present invention;
fig. 7 is a second diagram illustrating a change state of a pixel unit of an LED display panel according to an embodiment of the present invention;
fig. 8 is a third diagram illustrating a change state of a pixel unit of an LED display panel according to an embodiment of the present invention;
fig. 9 is a fourth diagram illustrating a change state of a pixel unit of an LED display panel according to an embodiment of the present invention;
in the figure, the LED lamp comprises a PCB (printed circuit board) 10, an LED lamp bead 20, a hemisphere colloid 30, a sealant layer 40, a 50-UV printing grid layer 60, a frosted atomization treatment layer 70, a bonding pad 80, a metal wire and a silver adhesive 90.
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 an LED display screen, which includes a PCB 10, wherein the PCB 10 is uniformly provided with bonding pads 70, and each bonding pad 70 is provided with a single-color LED lamp bead 20 by a COB packaging manner; a control driving module is integrally arranged on the PCB 10, the control driving module drives four adjacent LED lamp beads 20 in a time division multiplexing mode, and the color combination of the four LED lamp beads 20 is red, green and blue, red, green and blue yellow or red, green and blue green; and four adjacent LED lamp beads 20 are mixed and combined to form a pixel unit. The characteristic that human vision stays is utilized, the pads 70 which are regularly arranged are manufactured on the PCB 10, the LED lamp beads 20 with a certain color are installed on each pad 70, and the arrangement of the LED lamp beads 20 is according to a certain rule. The display screen control and drive circuit respectively drives 4 adjacent LED lamp beads 20 in different time periods, and the mixed light is synthesized into a pixel. Thus, each LED lamp bead 20 is combined with 3 adjacent LED lamp beads 20 in time sequence to form 4 pixels. The mode can reduce some definition, but can greatly reduce the manufacturing difficulty of the min iLED display screen, greatly reduce the cost, and is acceptable in terms of cost performance. Meanwhile, after the LED lamp beads 20 are fixed on the PCB 10, the LED lamp beads are sealed by transparent resin materials added with the light scattering agent or other materials, are in a semi-sphere shape, are sealed into a plane by adopting semi-transparent dark resin on the surface, and are subjected to frosted atomization treatment on a screen to reduce reflection, and then UV silk-screen grid lines are formed to reduce mirror reflection effect.
Specifically, as shown in fig. 6 to 9, the pixel color components at the odd positions of the odd-line image are respectively driven to light up 4 (1 group) adjacent LED lamp beads; in the next time period, pixel color components at even positions of odd rows of the image are respectively driven to light two LED lamp beads on the right of the 1 group of LED lamp beads and 2 LED lamp beads on the left of the 1 group of LED lamp beads on the right; in the next time period, pixel color components at odd positions of even rows of the image are respectively driven to light 2 LED lamp beads below the LED lamp beads in the group 1 and two LED lamp beads above the LED lamp beads in the group 1 below; and then in the next time period, respectively driving and lighting the pixel color components at the even number positions of the even number rows of the image to light the lower right corner LED lamp beads of the group 1 lamp beads, the lower left corner LED lamp beads of the group 1 lamp beads on the right, the upper right corner LED lamp beads of the group 1 lamp beads below and the upper left corner LED lamp beads of the group 1 LED lamp beads on the lower right corner. Therefore, 1 group of 4 LED lamp beads which are lighted each time form a pixel, and images are sequentially displayed on the LED display screen.
As shown in fig. 2, four adjacent pads 70 on the PCB 10 form a group, one of the two adjacent pads 70 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. 4, the LED lamp beads 20 are mounted on the PCB 10 in a forward mounting manner, and the PAD PADs of the LED lamp beads 20 are respectively connected to the positive electrode and the negative electrode of each of the PADs 70 through a metal wire 80.
As shown in fig. 5, the LED lamp beads 20 are mounted on the PCB 10 in an inverted manner, and PAD PADs of the LED lamp beads 20 are respectively fixed on the positive electrode and the negative electrode of each group of the PADs 70 through silver paste 90 or solder paste.
As shown in fig. 1, a hemisphere colloid 30 is disposed on each LED bead 20, and a sealant layer 40 is disposed on the hemisphere colloid 30. Optionally, a UV printing mesh layer 50 is disposed on the sealant layer 40, and a frosted atomization treatment layer 60 is disposed between the UV printing mesh layers 50. After the LED lamp beads are fixed on the PCB, the LED lamp beads are sealed by transparent resin materials added with the light scattering agent or other materials, are in a semi-spherical shape, are cured, are sealed into a plane by semi-transparent dark resin on the surface, and are cured. And finally, carrying out frosting atomization treatment on the plane to reduce reflection, and finally carrying out UV printing on the plane to form a mesh surface to reduce mirror reflection effect.
The utility model discloses LED display screen based on persistence of vision 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 the LED lamp pearl of a plurality of colours is regular arranges, and the colour combination can be red green blue, red green blue yellow or red green blue green. Four adjacent LED lamp pearls (1 group) can make up into a pixel unit through mixing the light. The control driving module controls four adjacent LED lamp beads to continuously mix light to form a new pixel unit in a time division multiplexing mode, and the pixels displayed by the LED display screen are 4 times that of physical pixels by utilizing the characteristic that human vision stays. Like this, the LED display screen can reduce cost, reduces COB's cost simultaneously.
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 (6)
1. An LED display screen based on persistence of vision is characterized by comprising a PCB (printed circuit board), 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; a control driving module is integrated on the PCB and drives four adjacent LED lamp beads in a time division multiplexing mode, and the color combination of the four LED lamp beads is red, green and blue, red, green and blue yellow or red, green and blue green; and four adjacent LED lamp beads are mixed and combined to form a pixel unit.
2. The LED display screen of claim 1, wherein four adjacent pads on the PCB form a group, and one of the two adjacent pads 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.
3. The LED display screen of claim 2, 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.
4. The LED display screen of claim 2, wherein the LED lamp beads are mounted on the PCB in an inverted manner, and the PAD PADs of the LED lamp beads are fixed on the positive electrode and the negative electrode of each group of the PADs respectively through silver paste or solder paste.
5. The LED display screen of claim 1, wherein a hemispherical colloid is disposed on each LED bead, and a sealant layer is disposed on the hemispherical colloid.
6. The LED display screen of claim 5, wherein a UV printed mesh layer is disposed on the sealant layer, and a frosted and atomized treatment layer is disposed between the UV printed mesh layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021450225.4U CN212322613U (en) | 2020-07-21 | 2020-07-21 | LED display screen based on persistence of vision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021450225.4U CN212322613U (en) | 2020-07-21 | 2020-07-21 | LED display screen based on persistence of vision |
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| CN212322613U true CN212322613U (en) | 2021-01-08 |
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| CN202021450225.4U Active CN212322613U (en) | 2020-07-21 | 2020-07-21 | LED display screen based on persistence of vision |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681599A (en) * | 2020-07-21 | 2020-09-18 | 深圳市大象视界科技有限公司 | LED display control method based on persistence of vision and LED display screen thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681599A (en) * | 2020-07-21 | 2020-09-18 | 深圳市大象视界科技有限公司 | LED display control method based on persistence of vision and LED display screen thereof |
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