CN102262844B - Aluminum-base integrated outdoor full-color three-in-one light-emitting diode (LED) display screen and method for manufacturing same - Google Patents
Aluminum-base integrated outdoor full-color three-in-one light-emitting diode (LED) display screen and method for manufacturing same Download PDFInfo
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- CN102262844B CN102262844B CN2011102212152A CN201110221215A CN102262844B CN 102262844 B CN102262844 B CN 102262844B CN 2011102212152 A CN2011102212152 A CN 2011102212152A CN 201110221215 A CN201110221215 A CN 201110221215A CN 102262844 B CN102262844 B CN 102262844B
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Abstract
The invention discloses an aluminum-base integrated outdoor full-color three-in-one light-emitting diode (LED) display screen and a method for manufacturing the same. The display screen comprises a shell, a driving plate, a driving/control device, a pin, M*N lenses and an aluminum alloy base plate, wherein a reflecting cup is arranged on the aluminum alloy base plate; and an LED chip is arranged in the reflecting cup. The display screen is characterized in that: a rectangular notch in which an epoxy base plate is embedded is formed in the center of the aluminum alloy base plate; radiating fins are arranged on the back surface of the aluminum alloy base plate, and an insulating adhesive layer is coated on the front surface of the aluminum alloy base plate; a copper foil is thermally pressed on the surface of the insulating adhesive layer; and a line and a pad are arranged on the surface of the copper foil. The method comprises the following steps of: preparing a composite aluminum alloy base plate; coating the insulating adhesive layer on the aluminum alloy base plate, and thermally pressing the copper foil; forming a groove on the aluminum alloy base plate, forming the reflecting cup, installing the LED chip, and welding a metal conductor; preparing a lamp panel with the M*N lenses; and installing the pin. The display screen provided by the invention is good in radiating effect and reliable in performance.
Description
Affiliated field
The present invention relates to LED display and manufacture method thereof, specifically relate to the three-in-one LED display of outdoor full color and manufacture method thereof.
Background technology
Along with the fast development of LED technology, the cost of LED reduces fast, and the scale of LED display is increasing, and an outdoor display screen uses millions of LED very general.Outdoor display screen is generally discrete direct insertion LED at present, and there is the problem of the following aspects in it: (1) adopts discrete device in a large number, so system reliability is low; (2) LED is direct insertion, and the heat that led chip produces need pass through insulating gel, lead-in wire, retort stand derivation, distributes to the display screen back then, so its thermal resistance is big, be difficult for heat radiation, so the LED light decay is serious, light decay is uneven, only be one, two year the actual life of a lot of display screens; (3) its rigging error of direct insertion LED is big, and LED may be up and down, left and right deflection, or high and low injustice, and this makes the visual angle of watching of display screen reality be far smaller than the nominal visual angle of LED, has a strong impact on viewing effect; (4) outdoor LED display screen generally adopts oval lens, the levels typical visual angle is ± 50 °, the vertical angle of view is ± 25 °, but the error of technologies such as solid crystalline substance, slotting support during owing to packaged LED, often cause optical axis not at the center position of lens, asymmetric visual angle can occur, error may be above 10 °, what this more made display screen reality watches the visual angle less than the nominal visual angle of LED, has a strong impact on viewing effect.(5) direct insertion LED display in process of production more adopts the manual lamp of inserting, and automaticity is very low, causes cost of labor high, and it is much to cause display screen the case of quality problems to occur by the static electricity on human body; Though there is a small amount of manufacturer to adopt automatism card machine to insert lamp, but owing to the inefficiency of inserter, poor for applicability, effect is undesirable and do not meet electron device Surface Mounting Technology, integrated reasons such as development trend, most of manufacturer can only adopt manual operational method of inserting lamp.
For overcoming above-mentioned shortcoming, many manufacturers have researched and developed the three-in-one LED display of outdoor type surface-adhered type full color (hereinafter to be referred as the Surface Mount LED display) in recent years, the Surface Mount LED display can adopt SMT standard processing procedure to carry out automated production, significantly improved production efficiency, the assembling consistance is also very good, horizontal view angle and vertical angle of view are all bigger, and the actual visual angle of watching is near the nominal visual angle of LED.But also there is the shortcoming of several aspects in the Surface Mount LED display: (1) Surface Mount LED display is only integrated each LEDs chip of red, green, blue, and integrated level is not high, causes LED display still to adopt a large amount of discrete LED devices, and integrity problem improves limited.(2) the bad problem of heat radiation does not only obtain better to solve, and worsens more on the contrary.May cause the display screen front surface to produce high temperature because sun in summer is exposed to the sun, so the heat that LED produces can not distribute forward, must distribute backward.Because the Surface Mount LED display is that to be mounted on PCB (generally be the epoxy radicals printed circuit board (PCB) of FR4 type, two-sided aluminum-base printing circuit board is because price is too high can't adopt) front surface on, therefore the heat of deriving by the LED pin at first is transmitted on the PCB front surface, via hole by some connection PCB front and rear surfaces is transmitted to the back with the heat of PCB front surface then, is dispersed in the air again.The thermal resistance of this structure is very big, and radiating effect is not as good as the straight cutting lamp, and when device such as drive IC especially was installed in the PCB rear surface, it was unbalanced also can to produce heat radiation, causes the LED light decay inconsistent, produces flower screen phenomenon.The heat radiation inferior position of Surface Mount LED is the one of the main reasons that causes outdoor surface welded LED display not obtain to widely apply.
Summary of the invention
Purpose of the present invention is exactly the three-in-one LED display of aluminium base integrated form outdoor full color that a kind of good heat dissipation effect, dependable performance will be provided, and a kind of method of making this display screen is provided simultaneously.
The three-in-one LED display of aluminium base integrated form outdoor full color provided by the present invention, include shell, drive plate, driving/control device, PIN pin, M * N lens, aluminium alloy base plate, aluminium alloy base plate is provided with reflector, be provided with led chip in the reflector, the central authorities that its design main points are described aluminium alloy base plate have the rectangle notch, and notch is embedded with the epoxy substrate; Its back side has radiating fin, front surface coated has the insulation glue-line, and this glue-line surface heat is pressed with Copper Foil; Copper foil surface is provided with circuit and pad.
The method for making of the three-in-one LED display of aluminium base integrated form outdoor full color provided by the present invention may further comprise the steps:
A, the central portion that the back side is had an aluminium alloy base plate of radiating fin separate the rectangular slot mouth, are embedded in the epoxy substrate at this notch, form the Al-alloy substrate;
B, at the front surface coated of Al-alloy substrate insulation glue-line, Copper Foil is placed this glue-line surface, hot pressing forms the Al-alloy copper-clad base plate; At this substrate surface etching or engraving circuit and pad;
C, go on foot described substrate at b and open M * N groove, and in groove inwall plated metal reflection horizon, form reflector, led chip and weld metal lead are installed in the reflector;
D, c gone on foot described substrate be installed in the shell that is provided with M * N cup hole, and in the cup hole encapsulated epoxy resin or silica gel, form the lamp plate that has M * N lens behind the hot setting;
E, an end of PIN pin interted be welded on the epoxy substrate of Al-alloy substrate, its other end plug-in mounting is welded on the drive plate that has driving/control device.
The present invention is by specially designed Al-alloy copper-clad base plate, effectively improved heat dispersion and the equal heat problem of outdoor LED display screen with LED, improved because temperature rise causes the problem that the led chip light decay is big or light decay is uneven and the life-span is short, improved reliability of products and stability greatly.
The present invention holes at described Al-alloy copper-clad base plate, constitutes the groove of removing Copper Foil and insulation glue-line thus, electroplates the reflection horizon in groove, forms reflector; At the direct etching of the copper foil surface of substrate or engraving circuit and pad, make that Copper Foil only is used for being electrically connected, but not heat-conducting medium has significantly reduced thermal resistance thus, this also is the fundamental difference of the present invention and common aluminium base copper-clad plate.
Description of drawings
Fig. 1 is the structural representation of display screen of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description.
The present invention as shown in Figure 1, include shell 7, drive plate 1, driving/control device 2, PIN pin 3, M * N light emitting pixel point, aluminium alloy base plate 4, reflector 17, led chip 9, the central authorities of aluminium alloy base plate 4 have the rectangle notch, notch is embedded with epoxy substrate 6, the insulation characterisitic of utilizing the epoxy substrate with PIN pin 3 intert with wherein as being electrically connected; The back side of aluminium alloy base plate 4 has radiating fin 5, this radiating fin 5 is cast consolidation with aluminium alloy base plate 4 by corresponding mould, cancelled the heat-conducting silicone grease between aluminium base and the heat radiator thus, thereby reduced thermal resistance, the front surface coated of aluminium alloy base plate 4 has insulation glue-line 11, and these glue-line 11 surface heats are pressed with Copper Foil 14; Copper Foil 14 surfaces are etching or engraving circuit and pad directly, has reduced intermediate layer thus, improves radiating effect; Aluminium alloy base plate 4 is provided with reflector 17, adopts the COB mode that led chip is installed in reflector 17, and this heat that LED is sent directly is dispersed in the air by aluminium alloy base plate and radiating fin, thereby has further reduced thermal resistance.Described shell also can add air thermal preservation cavity 10, the brim of a hat 15 at housing according to prior art.
Detailed method for making of the present invention is as follows:
A, be that the aluminium alloy extrusions of many group radiating fins 5 are arranged is substrate 4 plane, the back side with the front, at the central portion of this substrate 4 rectangle notch separately, epoxy substrate 6 that will be identical with its shape embeds wherein, forms the Al-alloy substrate thus.
B, at the common insulating gel of the front surface coated of above-mentioned Al-alloy substrate, form insulation glue-line 11, cover thereon then and press Copper Foil 14, the heating pressurization, solidify, form the Al-alloy copper-clad base plate.
C, at Al-alloy copper-clad base plate surface etching or engraving circuit and pad, pad electrodepositable metal forms weld layer, is used for being electrically connected.
D, go on foot described substrate at c and open M * N groove, remove local copper and the insulation course of covering, and 13 form reflectors 17 in groove inwall plated metal reflection horizon, point insulating glue 12, installation redgreenblue led chip 9 in reflector 17, bond through hot setting, use bonding equipment weld metal lead 16 between LED pad and aluminium base compound copper-clad plate pad then, formation is electrically connected.
E, will go up described substrate of step and be installed in the shell 7 that is provided with M * N cup hole, and in the cup hole encapsulated epoxy resin or silica gel, formation has the lamp plate of M * N lens 8 behind the hot setting;
F, an end of PIN pin 3 interted be welded on the epoxy substrate 6 of Al-alloy substrate, its other end plug-in mounting is welded on the drive plate 1 that has driving/control device 2, thus drive plate 1 and lamp plate are linked together, formation has the three-in-one LED display of aluminium base integrated form outdoor full color of M * N colour light-emitting pixel.
Beneficial effect of the present invention has obtained further checking by following test contrast:
Following table be three kinds of display screens (surface mounted light type, straight cutting lamp type, type of the present invention) led chip under various conditions temperature (℃) contrast.
Annotate: " all light " in the table and refer to that all pixels all light by rated power; " 1/4 power is lighted " refers to that all pixels all light by 1/4 of rated power; " 1/4 pixel is lighted " refers to only to have 1/4 pixel (according to equidistant arrangement) to light by rated power, and other pixel of 3/4 is not lighted.Duty when the two kinds of situations in back are used for the simulation playing image.
By the data in last table contrasts as can be seen, among the present invention led chip under various conditions its temperature all be starkly lower than surface mounted light type, straight cutting lamp type, and all thermal effect is very good.
Claims (1)
1. the method for making of the three-in-one LED display of aluminium base integrated form outdoor full color is characterized in that it may further comprise the steps:
A, the central authorities that the back side is had an aluminium alloy base plate (4) of radiating fin (5) open a rectangle notch, and notch embeds epoxy substrate (6), form the Al-alloy substrate;
B, at the front surface coated of Al-alloy substrate insulation glue-line (11), Copper Foil (15) is placed this glue-line (11) surface, hot pressing forms the Al-alloy copper-clad base plate; At this substrate surface etching or engraving circuit and pad;
C, go on foot recessing on the described substrate at b, and in groove inwall plated metal reflection horizon (13), form reflector (17), led chip (9) and weld metal lead are installed in the reflector (17);
D, c is gone on foot described substrate be installed in and be provided with
M*
NIn the shell (7) in individual cup hole, and in the cup hole encapsulated epoxy resin or silica gel, form behind the hot setting and have
M*
NThe lamp plate of individual lens (8);
F, an end of PIN pin (3) interted be welded on the epoxy substrate (6) of Al-alloy substrate, its other end plug-in mounting is welded on the drive plate (1) that has driving/control device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102212152A CN102262844B (en) | 2011-08-03 | 2011-08-03 | Aluminum-base integrated outdoor full-color three-in-one light-emitting diode (LED) display screen and method for manufacturing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102212152A CN102262844B (en) | 2011-08-03 | 2011-08-03 | Aluminum-base integrated outdoor full-color three-in-one light-emitting diode (LED) display screen and method for manufacturing same |
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| Publication Number | Publication Date |
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| CN102262844A CN102262844A (en) | 2011-11-30 |
| CN102262844B true CN102262844B (en) | 2013-08-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201344093A (en) * | 2012-04-18 | 2013-11-01 | Gem Weltronics Twn Corp | Integrated multi-layered lighting fixture and integrated multi-layer lighting fixture that can be assembled in multiples |
| CN104217659A (en) * | 2014-09-29 | 2014-12-17 | 广东威创视讯科技股份有限公司 | Novel LED (light emitting diode) display screen |
| CN106515133B (en) * | 2015-08-24 | 2018-07-31 | 浙江展邦电子科技有限公司 | A kind of manufacturing method of the double-side aluminum copper-clad plate of LED lamp |
Citations (6)
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|---|---|---|---|---|
| US5836676A (en) * | 1996-05-07 | 1998-11-17 | Koha Co., Ltd. | Light emitting display apparatus |
| CN201075269Y (en) * | 2007-09-18 | 2008-06-18 | 深圳市九洲光电子有限公司 | High-density LED lattice screen |
| CN201689616U (en) * | 2010-04-01 | 2010-12-29 | 石家庄市京华电子实业有限公司 | Outdoor three-in-one surface-mount LED die set |
| CN102184915A (en) * | 2011-04-06 | 2011-09-14 | 周波 | High-power base plate effectively integrating circuit board and radiator and manufacturing method thereof |
| CN202003622U (en) * | 2011-04-14 | 2011-10-05 | 石家庄市京华电子实业有限公司 | High-integrated full-color three-in-one LED (Light Emitting Diode) display device |
| CN202150231U (en) * | 2011-08-03 | 2012-02-22 | 石家庄市京华电子实业有限公司 | Aluminum based integrated outdoor full-color three-in-one LED display screen |
-
2011
- 2011-08-03 CN CN2011102212152A patent/CN102262844B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5836676A (en) * | 1996-05-07 | 1998-11-17 | Koha Co., Ltd. | Light emitting display apparatus |
| CN201075269Y (en) * | 2007-09-18 | 2008-06-18 | 深圳市九洲光电子有限公司 | High-density LED lattice screen |
| CN201689616U (en) * | 2010-04-01 | 2010-12-29 | 石家庄市京华电子实业有限公司 | Outdoor three-in-one surface-mount LED die set |
| CN102184915A (en) * | 2011-04-06 | 2011-09-14 | 周波 | High-power base plate effectively integrating circuit board and radiator and manufacturing method thereof |
| CN202003622U (en) * | 2011-04-14 | 2011-10-05 | 石家庄市京华电子实业有限公司 | High-integrated full-color three-in-one LED (Light Emitting Diode) display device |
| CN202150231U (en) * | 2011-08-03 | 2012-02-22 | 石家庄市京华电子实业有限公司 | Aluminum based integrated outdoor full-color three-in-one LED display screen |
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Granted publication date: 20130814 Termination date: 20190803 |