How is the LED display waterproof?
LED display waterproof box
While the outdoor LED display in the choice must consider the following:
1, brightness: (indoor screen luminous brightness than the outdoor screen several times to several times; the indoor display on the outside as the TV on the outside as the brightness is not enough)
What are the brightness requirements for the screen body?
General brightness requirements are as follows:
(1) Indoor:> 800CD / m2
(2) semi-indoor:> 2000CD / m2
(3) outdoors (sitting north and south):> 4000CD / m2
(4) outdoors (sitting south):> 8000CD / m2
2, the environment: outdoor screen to be anti-rain, anti-sunlight, dust, high temperature, wind, lightning, etc., and the indoor screen is no need to consider these issues
3, viewing distance: according to the distance to see the distance to choose a different pitch LED display, not only in the brightness can be better control, more cost savings, to avoid unnecessary waste.
4, the user needs to play what?
Can be learned according to their own want to play the content, or want to achieve the playback effect to select the appropriate self-LED display.
(1) text display: depending on the size of the text and the need for resolution;
(2) ordinary video display: 320 × 240 dot matrix;
(3) digital standard DVD display: ≥ 640 × 480 dot matrix;
(4) complete computer video: ≥ 800 × 600 dot matrix;
5, power consumption
Power consumption - this is a lot of people are concerned about the problem, outdoor LED display (full color) of the maximum power consumption of about 800W / square or so, that is when the outdoor LED display every moment to reach the maximum power (peak ), The power consumption per square hour will be 0.8 kWh, but not all of the LED outdoor display work will peak, because when the screen all the lights (RGB three colors of light) are lit and Are the brightest time LED household display will reach the peak.When the outdoor LED display normal play an animation when the power consumption is only about 65% of the maximum power consumption, so the outdoor LED display per square hourly consumption If the amount of electricity is 0.8KW * 65% = 0.52 degrees. If you count 100 square meters of outdoor LED display power consumption (12 hours per day to play) is: 12 * 30 * 12 * 100 * 0.52 = 224640 electricity. Electricity even if the calculation by a dollar, the outdoor LED display used by the electricity costs of about 22 million, so root Zelkowa environmental brightness and viewing distance to select the appropriate display in the cost control is particularly important.
In the purchase of LED display must be asked to go to the factory to visit, observe the production line and quality control, to see whether it is handmade or part of the hand-made factories and can provide relevant product certification, such as CE, FCC, 3C and so on.
After considering the above factors, let's take a look at the definition of the IP rating of the degree of protection. The IP (INTERNATIONAL PROTECTION) protection system is designed by IEC (INTERNATIONAL ELECTROTECHNICAL) in the LED industry application. COMMISSION). The lamps according to their characteristics of dust and moisture to be graded. The foreign objects referred to herein contain tools, human fingers and so on are not exposed to the live part of the lamp to avoid electric shock.
At present, LED industry outdoor lighting and display waterproof box in the factory test can be achieved on both sides of the IP65 screen body are known as outdoor waterproof screen, the following we look at the outdoor waterproof screen used by the structure:
Conventional outdoor straight lights full color screen is: outdoor module plus closed box structure after treatment composed of outdoor waterproof display box, waterproof display box assembled into outdoor full color screen. So the display box is the basic unit that makes up the display body. Using the box structure, one is easy to schedule, aging, on-site maintenance; the second is to facilitate packaging, transportation; third is the site installation and removal of convenient. Show the front of the box with a display module, the cabinet is fixed inside the display drive circuit board. The switching power supply is mounted on the rear cover of the box. In the box on the back cover is also installed with a fan, punching a hundred windows and so on. The box adopts inner and outer surface spray treatment, with anti-corrosion, moisture, oxidation, flame retardant and other functions, for the display body to provide security protection. On the display structure, the first module should be outdoor waterproof module, the second module should be painted on the back of three anti-paint, third, the box should be waterproof box, the seal is better, you can do waterproof test Display surface sprinkler test. After a number of tests, the outdoor waterproof cabinet IP protection level to achieve IP65 in order to achieve the true sense of the water, and the other parts of the box parts perishable parts of the body part of the metal column, circuit boards, terminals, Water-sensitive components for the circuit board, electronic components pins. Other parts of the kit, are engineering plastics (polycarbonate), epoxy, rubber, etc., are not sensitive to water vapor.
From the current market demand point of view, more users in the display body of the box structure began to have more requirements, the indoor display also began to thin, easy to dismantle the development of the box, but from a professional point of view, Indoor screen box is not completely closed, thin will be able to play a waterproof effect, like your computer chassis, the box structure is only play a dust, anti-foreign matter and other effects, if a large area of water, will cause internal damage, And the space is too small, is not conducive to heat. So the specific protection function of the display depends on the factory IP level to decide. And the indoor display in the box selection can be selected according to the actual situation on it. Such as fixed wall installation of the display, the ordinary simple box on it, in terms of heat dissipation and other aspects than the thin closed box is more applicable.
With the diversification of the stage performances and other programs, the stage dedicated LED display to promote the development of LED rental screen, because the packaging process is different, but also generally determines the use of the screen body, such as the full color of the lamp is generally suitable for outdoor, The current minimum point spacing for the PH10mm, and the indoor full color screen can choose: surface-paste three-in-one full-color and dot matrix integration triple play, the world of these two indoor full color minimum spacing of PH4mm, and the surface paste Color point spacing can do PH3mm the company is also small, until 2012, Guangzhou International LED exhibition only Konka company to break through the ultra-small point spacing PH2.2mm, these conceptual products in addition to show the company's R & D strength, Expensive, and can not be accepted by the market. So the mainstream products are still PH4mm spacing above products, as well as the current market P12.5, P13 net color and so on. Surface paste product packaging technology SMD3528, SMD5050, SMD2121, SMD2020 and so on. But the SMD chip packaging process determines the surface mount products do not have high resistance and waterproof performance, because the SMD lamp pin is short, even if the irrigation glue, can only be a very thin layer, such as lamp foot water, will Resulting in short circuit and other phenomena, peripheral protection (such as irrigation, plus mask, etc.) can only play a short protective effect, is not really sense of water, it can only recommend indoor or protective semi-outdoor conditions apply. Dot matrix integration triple play, is composed of 8 * 8,4 * 4 pixels to form a small module, dot matrix module of each pixel has red, green and blue three chip package, filling the ring Oxygen resin glue plus the kit shell module, and then by the module row of welding on the PCB, after filling the process of processing such as the formation of lattice element plate, dot matrix pin can play the role of light drive separation, a font package Of the process can increase the dot matrix product color mixing effect and perspective, the general lattice product visual effect is softer, the human eye more easily adapt, up and down and left and right angle can reach 140 degrees. But the color brightness than the surface and single lamp products slightly worse, the relative cost than the surface paste products cheaper. Dot matrix products due to the special characteristics of the packaging process surface can be done indoors can also be used and direct light products for outdoor display, outdoor display looks more beautiful, the relative cost is higher than the full color, direct sunlight In the brightness slightly lower than the full color of the straight, according to the actual needs of the situation to choose.