With the development of outdoor surface mount lamps (SMD LED), many domestic and foreign suppliers have gradually reached the practical stage. In addition to extreme high temperature and high humidity, the application reliability has been almost the same as that of in-line LEDs. In terms of high-density outdoor screens, P8 and higher density screens, outdoor surface mount lights are almost the only choice.
However, the surface mount lamp is used as an outdoor screen light, and a short board has not been overcome yet, that is, power consumption. In general, the same grade of surface-mounted LED screen and in-line LED (refer to the angle of 110 degrees / 50 degrees of light) LED screen (to achieve the same brightness), the former is generally 50% larger than the latter power consumption Left and right, this limits the use of surface mount lamps as a large screen and energy saving concept for outdoor products. Therefore, most of the outdoor energy-saving concept displays are mostly made by using in-line LEDs.
Comparing the surface-mount LEDs and in-line LED angle characteristics of the display, it can be seen that:
· The surface mount lamp generally has a vertical viewing angle of 110 degrees, while the in-line LED angle is only about 50 degrees.
· The angular characteristics of the vertical direction of the surface are almost symmetrical. There are many suppliers of in-line LEDs ( CREE, etc.) and products with a downward tilt angle.
Although the efficacy of the chip is constantly increasing, the power consumption of the display is constantly shrinking. However, this reduction occurs synchronously on the surface mount lamp and the in-line LED. The difference in energy consumption between the outdoor surface mount lamp and the in-line LED (about 1:1.5) does not shrink.
So if you can make a surface-mounted LED with an angle feature and an in-line LED with a downward tilt angle (of course with the right price and performance), the same or close to the in-line LED screen. Energy consumption. The last obstacle to the outdoor energy-saving screen was removed. This will have a huge impact on the market distribution of outdoor LED screen lights.
as the picture shows:
1. The angle is tilted downward by the offset of the chip and the inclined rubber surface. Adjust the shape of the light cup to achieve the spot of the ellipse (large left and right angles, small vertical angle).
2. The longitudinal section of the light cup adopts a shape close to the paraboloid, which enhances the reflection of the light cup. The colloid uses less diffusing agent, so that the light is moderately concentrated toward the middle. Close to the light distribution curve of the elliptical in-line LED.
3. Since there is only one chip per lamp, the heat dissipation condition is better than that of the 3-in-1 SMDLED lamp, and the power can be made larger. The high-brightness group (for P25 or larger spacing) should be able to reach a maximum brightness of 4 cd or more for each set of lights (one for each of red, green and blue). Energy consumption indicators should be expected to be very close to the mainstream 4mm elliptical in-line LEDs on the market today.
With the above or similar design, the LED screen made by the surface mount lamp has the same power saving as the screen made by the in-line LED. Thus changing the large-area screen in the outdoor can only use the in-line LED to save power.
At the same time, as a manufacturing company, the use of surface-mounted lamps instead of in-line LEDs (using a placement machine instead of a plug-in machine) also has many advantages based on cost, efficiency, productivity and flexibility (easy to handle processing). Furthermore, since the surface mount lamp display requires less sealant, it is also very helpful for lightweight design.
In short, the surface-saving lamps for outdoor energy-saving display screens described in this paper should be able to reduce the energy consumption of low-density outdoor surface-mounted screens to be consistent with the screens made with in-line LEDs, while reducing the weight of the screen (new Old buildings are easier to install and safer, increase production efficiency, reduce production costs, and achieve energy saving and environmental protection.
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