1968 HP company will produce the red LED display
light emitting light (
Wavelength of 660 nm)
Appeared in succession, and can be used to display the yellow, green,
Wavelength of 570 nm)
Wavelength of 470 nm)
And pure green,
Wavelength of 525 nm)
, but at present because of high brightness blue, pure green semiconductor chip manufacturing technology is mainly in Japan, such as the United States a few companies, price is quite expensive.
Applied to the LED display LED luminescent material has the following several forms: (1) LED display light emitting light (
Or single lamp)
Generally by a single chip LED display, reflective bowl, metal anode, metal cathode, outsourcing has pervious to light focusing ability of epoxy resin shell.
Can use one or more (
Single light constitute a basic pixel, due to their high brightness, used for outdoor LED display.
(2) LED display bitmap module consists of several chip light-emitting matrix, with epoxy encapsulated in a plastic case.
Suitable for scanning drive, easy to constitute a high density of LED display, used for indoor LED display.
(3) the patch type LED display light emitting light (
Or SMD LED)
Is LED display light emitting light stick welding forms of packaging, can be used for indoor full color LED display, which can realize a single point of maintenance, effectively overcome the Mosaic phenomenon.
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