CN102280076A - Outdoor LED display screen structure - Google Patents
Outdoor LED display screen structure Download PDFInfo
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- CN102280076A CN102280076A CN2010101977129A CN201010197712A CN102280076A CN 102280076 A CN102280076 A CN 102280076A CN 2010101977129 A CN2010101977129 A CN 2010101977129A CN 201010197712 A CN201010197712 A CN 201010197712A CN 102280076 A CN102280076 A CN 102280076A
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- printed circuit
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Abstract
The invention discloses an outdoor LED display screen structure, comprises a plurality of LEDs, a printed circuit board and an LED drive chip, wherein the plurality of LEDs are electrically fixed on the printed circuit board, the LED drive chip is used for controlling the value of current supplied to the LEDs, the printed circuit board is an aluminum substrate printed circuit board, each LED is a surface-mount type LED with a metal plastic support, a heat radiating disc is arranged at the bottom of the support of each LED, and each LED is of a lighting and driving integration structure. The outdoor LED display screen structure has the advantages of good heat radiating performance, good quality, wide watch angle, long watch distance and long service life.
Description
Technical field
The present invention relates to a kind of improvement of outdoor LED display screen structure, specifically relate to a kind of good heat dissipation, quality better, viewing angle is wide, viewing distance is far away and the outdoor LED display screen of long service life.
Background technology
LED---Light Emitting Diode, being light emitting diode, is a kind of semiconductor solid luminescence device, and it is to utilize the solid semiconductor chip as luminescent material, when two ends add forward voltage, the charge carrier in the semiconductor takes place compoundly to cause photo emissions and produce light.LED can directly send red, yellow, blue, green, blue or green, orange, purple, white light.
Printed circuit board (PCB)---PCB (Printed Circuie Board) normally on insulating substrate, by predetermined design, makes printed wiring, prints assembly or printed circuit that both combine.
Constant-current driving IC---Constant Current IC is meant that in the working environment that drive IC allows, the predetermined electric current value was characterized in that the variation of external impedance is minimum to the influence of its output current when constant output designed.
LED display---LED Panel, it is a kind of display mode by control LED, leans on the light on and off of LED to come the display screen of various information such as display text, figure, image, animation, market, video, video signal.
The structure of traditional outdoor LED display screen is as follows: the substrate of wiring board adopts the substrate (being generally doubling plate) of FR-4 (FR-4 is the Grade numbers of flame resistant material) material, with LAMP LED (bulb shape plug-in type LED) is luminescence component, LAMP LED inserts on the wiring board according to certain rule of arranging and welding is fixed, the glue shell of packing into then pours into fluid sealant, uses constant-current driving IC (LED chip for driving) to control the electric current of three kinds of color LED.
There is following shortcoming in this traditional outdoor LED display screen:
A, because wiring board adopts the FR-4 resin substrate, heat dispersion is not very desirable;
B, because LED adopts is LAMP LED luminescence component, be plug-in type, bad probability appears more than 30%, and easy-maintaining not in processing procedure;
C, because LED adopts is LAMP LED luminescence component, the display screen viewing angle is limited by LAMP LED lighting angle, level angle is less than 110 degree, vertical angle is less than 50 degree;
D, because wiring board adopts the FR-4 resin substrate, and LED adopts is LAMP LED, because of the heat radiation limitation, can not encapsulate big chips, so that brightness can not reach at a distance (outside surpassing 200 meters) and watch, and the brightness of cell board has only about 6000MCD;
E, because wiring board adopts the FR-4 resin substrate, and LED adopts is LAMP LED, so poor heat radiation, and then makes that the aging light decay of LED is obvious, aging light decay was about 5% in general 1000 hours, had limited the serviceable life of product;
F, because LED adopts is LAMP LED, be plug-in type, consider that the LAMPLED lamp base is to factors such as the influence of back side LED chip for driving and heat radiations, the general lamp that adopts drives separate mode, be LED at one independently on the wiring board, on another circuit, plug connector is many again for the LED chip for driving, and yield is low in the processing procedure.
Summary of the invention
In order to overcome above-mentioned defective, the invention provides a kind of outdoor LED display screen structure, this outdoor LED display screen structure good heat dissipation, quality better, viewing angle is wide, viewing distance is far away and long service life.
The present invention for the technical scheme that solves its technical matters and adopt is:
A kind of outdoor LED display screen structure, comprise some LED, printed circuit board (PCB) and LED chip for driving, some LED electrically are fixed on the described printed circuit board (PCB), and described LED chip for driving control offers the current value of described LED, and described printed circuit board (PCB) is the aluminium base printed circuit board (PCB).The characteristics of aluminium base printed circuit board (PCB) are: insulation course is thin, thermal resistance is little, nonmagnetic, good heat dissipation, physical strength height, heat-proof combustion-resistant, dimensional stability are good.The present invention adopts the aluminium base printed circuit board (PCB) of high thermal conductivity coefficient can improve the heat dispersion of outdoor LED display screen.
Further technical scheme of the present invention is:
Described LED is the mounted type LED (TOP LED) with metallo-plastic support.Because the lighting angle of TOP LED is wideer than the lighting angle of LAMP LED, therefore adopt TOP LED can make the outdoor LED display screen viewing angle bigger, level angle can reach 120～130 degree, and vertical angle can reach 100 degree.
Described LED chip for driving and some mounted type LED with metallo-plastic support electrically are fixed on the same aluminium base printed circuit board (PCB).Be that lamp drives unification, than traditional outdoor LED display screen LAMP LED and lamp that the LED chip for driving is separated driven to separate to reduce and more many plug-in unit that LED chip for driving of the present invention adopts wide pin position, process rate is than adopting LAMP LED to exceed more than 30%, and the maintenanceability height.
Described frame bottom with mounted type LED of metallo-plastic support has heat dissipation plate.Heat dissipation plate is a metal material, and heat dissipation plate can make the heat of LED derive rapidly, thereby reduces the light decay of LED own, prolongs the service time of outdoor LED display screen.The outdoor LED display screen of the TOP LED of this employing aluminium base printed circuit board (PCB) and band heat dissipation plate, its light decay of 1000 hours is about 3%.And outdoor LED display screen of the present invention adopts the TOP LED of aluminium base printed circuit board (PCB) and band heat dissipation plate, improved heat dispersion, therefore can adopt the large size chip packaged LED, the brightness of LED assembly is increased, make that the brightness of display screen under the equal specification is higher, can increase viewing distance, outdoor LED display screen brightness of the present invention can be greater than 10000MCD, 300 meters still clear with interior viewing effect, strengthens chip size, and viewing effect more can reach beyond 300 meters.
Described aluminium base printed circuit board (PCB) is a multilayer board.In the printed circuit board industry, the circuit board that will have conductive pattern circuit more than three layers or three layers is called multilayer board.Aluminium base printed circuit board (PCB) of the present invention is a multilayer board, increase the wiring number of plies, thereby strengthened design flexibility, can constitute circuit with a constant impedance, can form the high-speed transfer circuit, circuit, magnetic circuit screen layer can be set, metal-cored heat dissipating layer also can be set to satisfy features needs such as shielding, heat radiation, the reliability height is installed simply.
Each described mounted type LED inside with metallo-plastic support is packaged with three luminescent wafers of red, green, blue.
The invention has the beneficial effects as follows: outdoor LED display screen structure of the present invention adopts the TOP LED of aluminium base printed circuit board (PCB) and bottom band heat dissipation plate, and adopts lamp to drive the structure of unification, has the following advantages:
A, owing to adopted the aluminium base printed circuit board (PCB) of high thermal conductivity coefficient, can improve the heat dispersion of outdoor LED display screen;
B, owing to adopt TOP LED to substitute the LAMP LED that tradition is used, make that the outdoor LED display screen viewing angle is bigger;
C, LED chip for driving and some TOP LED electrically are fixed on the same aluminium base printed circuit board (PCB), be that lamp drives unification, than traditional outdoor LED display screen LAMPLED and lamp that the LED chip for driving is separated are driven to separate to reduce and more many plug-in unit, and the LED chip for driving adopts wide pin position, process rate exceeds more than 30% than employing LAMP LED, and the maintenanceability height;
The frame bottom of D, TOP LED has heat dissipation plate, and the heat of LED is derived rapidly, thereby reduces the light decay of LED own, prolongs the service time of outdoor LED display screen;
E, outdoor LED display screen of the present invention adopt the TOP LED of aluminium base printed circuit board (PCB) and band heat dissipation plate, improved heat dispersion, therefore can adopt the large size chip packaged LED, the brightness of LED assembly is increased, make that the brightness of display screen under the equal specification is higher, can increase viewing distance.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the lighting angle contrast synoptic diagram of LAMP LED of the present invention and TOP LED;
Fig. 3 is a TOP LED bottom schematic view of the present invention.
Embodiment
Embodiment: a kind of outdoor LED display screen structure, comprise some LED, printed circuit board (PCB) and LED chip for driving, some LED electrically are fixed on the described printed circuit board (PCB), and described LED chip for driving control offers the current value of described LED, and described printed circuit board (PCB) is an aluminium base printed circuit board (PCB) 1.The characteristics of aluminium base printed circuit board (PCB) are: insulation course is thin, thermal resistance is little, nonmagnetic, good heat dissipation, physical strength height, heat-proof combustion-resistant, dimensional stability are good.The present invention adopts the aluminium base printed circuit board (PCB) of high thermal conductivity coefficient can improve the heat dispersion of outdoor LED display screen.
Described LED is the mounted type LED 2 (TOP LED) with metallo-plastic support.Because the lighting angle of TOP LED 2 is wideer than the lighting angle of LAMP LED 3, therefore adopt TOP LED can make the outdoor LED display screen viewing angle bigger, level angle can reach 120～130 degree, and vertical angle can reach 100 degree.
Described LED chip for driving and some mounted type LED with metallo-plastic support electrically are fixed on the same aluminium base printed circuit board (PCB).Be that lamp drives unification, than traditional outdoor LED display screen LAMP LED and lamp that the LED chip for driving is separated driven to separate to reduce and more many plug-in unit that LED chip for driving of the present invention adopts wide pin position, process rate is than adopting LAMP LED to exceed more than 30%, and the maintenanceability height.
Described frame bottom with mounted type LED of metallo-plastic support has heat dissipation plate 4.Heat dissipation plate is a metal material, and heat dissipation plate can make the heat of LED derive rapidly, thereby reduces the light decay of LED own, prolongs the service time of outdoor LED display screen.The outdoor LED display screen of the TOP LED of this employing aluminium base printed circuit board (PCB) and band heat dissipation plate, its light decay of 1000 hours is about 3%.And outdoor LED display screen of the present invention adopts the TOP LED of aluminium base printed circuit board (PCB) and band heat dissipation plate, improved heat dispersion, therefore can adopt the large size chip packaged LED, the brightness of LED assembly is increased, make that the brightness of display screen under the equal specification is higher, can increase viewing distance, outdoor LED display screen brightness of the present invention can be greater than 10000MCD, 300 meters still clear with interior viewing effect, strengthens chip size, and viewing effect more can reach beyond 300 meters.
Described aluminium base printed circuit board (PCB) is a multilayer board.In the printed circuit board industry, the circuit board that will have conductive pattern circuit more than three layers or three layers is called multilayer board.Aluminium base printed circuit board (PCB) of the present invention is a multilayer board, increase the wiring number of plies, thereby strengthened design flexibility, can constitute circuit with a constant impedance, can form the high-speed transfer circuit, circuit, magnetic circuit screen layer can be set, metal-cored heat dissipating layer also can be set to satisfy features needs such as shielding, heat radiation, the reliability height is installed simply.
Each described mounted type LED inside with metallo-plastic support is packaged with three luminescent wafers of red, green, blue.
Claims (6)
1. outdoor LED display screen structure, comprise some LED, printed circuit board (PCB) and LED chip for driving, some LED electrically are fixed on the described printed circuit board (PCB), described LED chip for driving control offers the current value of described LED, and it is characterized in that: described printed circuit board (PCB) is aluminium base printed circuit board (PCB) (1).
2. outdoor LED display screen structure according to claim 1 is characterized in that: described LED is the mounted type LED (2) with metallo-plastic support.
3. outdoor LED display screen structure according to claim 2 is characterized in that: described LED chip for driving and some mounted type LED with metallo-plastic support electrically are fixed on the same aluminium base printed circuit board (PCB).
4. outdoor LED display screen structure according to claim 2 is characterized in that: described frame bottom with mounted type LED of metallo-plastic support has heat dissipation plate (4).
5. outdoor LED display screen structure according to claim 1 is characterized in that: described aluminium base printed circuit board (PCB) is a multilayer board.
6. according to the described outdoor LED display screen structure of one of claim 1 to 5, it is characterized in that: each described mounted type LED inside with metallo-plastic support is packaged with three luminescent wafers of red, green, blue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101977129A CN102280076A (en) | 2010-06-08 | 2010-06-08 | Outdoor LED display screen structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101977129A CN102280076A (en) | 2010-06-08 | 2010-06-08 | Outdoor LED display screen structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102280076A true CN102280076A (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101977129A Pending CN102280076A (en) | 2010-06-08 | 2010-06-08 | Outdoor LED display screen structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943038A (en) * | 2014-04-03 | 2014-07-23 | 吴光 | Outdoor display unit module based on integrated series unit board |
| CN109767696A (en) * | 2018-12-27 | 2019-05-17 | 山东欣立得光电科技有限公司 | A kind of small space distance LED display screen in interior |
-
2010
- 2010-06-08 CN CN2010101977129A patent/CN102280076A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943038A (en) * | 2014-04-03 | 2014-07-23 | 吴光 | Outdoor display unit module based on integrated series unit board |
| CN109767696A (en) * | 2018-12-27 | 2019-05-17 | 山东欣立得光电科技有限公司 | A kind of small space distance LED display screen in interior |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111214 |