Monday, December 30, 2013

led灯珠在led显示屏中功用

led灯珠在led显示屏中功用


    首先,LED灯珠在整个全彩LED显示屏中使用数量最多,每平方米可能就有几千甚至到几万个LED灯珠。      最后,LED灯珠直接决定了全彩LED显示屏显示的性能和色彩的饱和度和清晰度。     LED灯珠品质的重要指标主要有:   
  一、全彩LED显示屏亮度     LED灯珠的亮度决定了全彩LED显示屏的亮度,LED灯珠亮度越高,使用电流的余量越大,对节省耗电、保持LED灯珠稳定有好处。LED灯珠有不同的角度值,在芯片亮度已定的情况下,角度越小,LED则越亮,但显示屏的视角则越小。一般应选择100度-110度的LED灯珠以保证全彩LED显示屏足够的视角。    
 二、全彩LED显示屏失效率     LED显示屏是由上万甚至几十万组的红、绿、蓝三种LED灯珠组成。灯珠的失效率即便老化72个小时也不会高于万分之一。  
  三、全彩LED显示屏衰减特性     LED灯珠随着使用时间的增加亮度会慢慢衰减。LED灯珠亮度的衰减速度与LED芯片、辅助物料、封装工艺都有一定的关联。一般来说,1000小时、20毫安培常温点亮试验后,红色LED灯珠的衰减应小于7%,蓝、绿色LED灯珠的衰减应小于10%.红、绿、蓝衰减的一致性对全彩LED显示屏日后的白平衡影响很大,进而影响显示屏的显示保真度。    
 四、LED显示屏抗静电能力     由于LED灯珠是半导体器件,对静电敏感,极易引致静电失效,故抗静电能力对LED显示屏的寿命至关重要。一般来说,LED灯珠的人体静电模式测试失效电压不应低于2000V

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SMD LED outdoor display

SMD LED outdoor display
SMD LED outdoor display

Questions before LED display quote

SMD outdoor LED video display global supplier If you need a LED screen quote, please answer carefully the questions below so we can propose you the correct specifications to generate the quote for any LED screen for you isntantly. 1.Your contact details Name: company: email address: telephone number: Nextel: address: 2.Your led screen information in the application: - Type of LED screen Displays for text, images or video installation type : indoor or outdoor With various colors or Monochrome - minimum viewing distance - Approximate size led screen width led screen height - Type of communication preferred type of control system simple control system/ advance live video controller control distance wireless controller( internet/wifi)/ less than 100 meter/less than 400 meters/over 400 meters - Function or intended purpose rental or fixed outdoor advertising Best regards, Sally Peng Oversea Sales Manager Cell: 0086 18898792143 Gmail: pengsally@gmail.com Skype/Wechat: sallypwp