LED has been recognized as the core device for next-generation lighting and display. Gan epitaxially grown quantum well LED devices are currently popular products on the market. However, the Gan epitaxial growth quantum well requires ultra-high vacuum, ultra-high purity raw materials, ultra-density electrical energy consumption and the like. To this end, both the display industry and the lighting industry have chosen a relatively low-cost idea of ​​combining blue LEDs with down-converted rare earth phosphors. However, this combination of routes leads to defects such as low light quality and incomplete color gamut.
Unlike the Gan quantum well LED, the luminescent center of the OLED device is an organic molecule and can be prepared under less demanding vacuum conditions. Organic light-emitting diodes have been used in small-screen displays, but their thermal stability and chemical stability have always been a thorny problem, which is directly manifested by the harsh processing requirements of the device and the insufficiency of device lifetime.
Obviously, quantum dot light-emitting diodes are expected to combine the advantages of both Gan quantum well LEDs and organic light-emitting diodes. However, after 20 years of unremitting efforts by scientists, the comprehensive performance of quantum dot LEDs – including efficiency, longevity, and processing – is far behind expectations. This is mainly due to the compatibility of quantum dots with quantum dot light-emitting diode devices and the special structure of quantum dot light-emitting diodes.
The team of Zhejiang University designed and synthesized special quantum dots for quantum dot light-emitting diodes, and analyzed the device characteristics of quantum dot light-emitting diodes. The key problems of the device structure were found, and a layer of nano-insertion was inserted into the device. The insulating layer solves the key difficulty of positive and load carrier injection balance. The success of these two aspects has experimentally verified the feasibility of the practical application of quantum dot light-emitting diodes. This indicates that quantum dot LEDs are expected to play an important role in both lighting and display industries.
Coaxial Power D-Sub Solder Cup
Coaxial Power D-Sub Solder Cup Contacts with Mixed or Full Layout
Transmit Radio Frequency Signals
The Coaxial D-Sub have like the Power D-Subr replaced the two rows in a Standard Density connector with a coaxial contact that take up about the same size as the two rows of signal contacts. The Coaxial D-Sub is exactly the same size as the Standard Density connector but instead of example 9 positions of signal pins it has 2 power contacts , or instead of 37 positions of signals it has 8 coaxial contacts.
The Impedance for the coaxial contacts are 50Ω or 75Ω
The Coaxial D-Sub with Mixed Layout mixes both coaxial contacts and signal contacts in the same connector. For example the same size as a 15 position Standard Density D-Sub you can have what we call a 7W2, which means there is 7 contacts where 2 of them are coaxial contacts, which means there are 5 signal contacts, so 5 signals and 2 coaxial. See the Layout in the Tech Specs on the bottom, there are a lot of combinations of the Mixed Layout alternative.
Antenk's Coaxial D-Sub connectors are available in 5 standard shell sizes with 23 multiple contact arrangements. These reliable, robust combination d-sub connectors allow a combination of signal and coaxial contacts in cable mount, vertical board mount & right angle board mount termination type variations.
Features
Coaxial d-sub for a variety of applications in cable mount.
Signal contacts come pre-loaded. Coaxial contacts supplied - Not Pre-Loaded.
Available in 5 standard shell sizes with 23 multiple contact arrangements: 1W1/ 2V2 /2W2 /3V3/ 3W3/ 5W1/ 5W5
/ 7W2/ 8W8/ 9W4/ 11W1/ 13W3/ 13W6 /17W2/ 17W5 /21W1/ 21W4/ 24W7/ 25W3 /27W2/ 36W4/ 43W2/ 47W1
Allows combination of signal and coaxial d-sub contacts.Materials
Shell: Steel, nickel plated
Insulator: PBT + 30% fiber-glass - Black, U.L. rated 94V-O
Contacts: Brass - Gold flash over nickel
Notes
Panel Cut-Outs
5W1 = Standard 9 Pin Shell
3W3 / 3W3K / 7W2 / 11W1 = Standard 15 Pin Shell
5W5 / 9W4 / 13W3 / 17W2 / 21W1= Standard 25 Pin Shell
8W8 / 21WA4 = Standard 37 Pin Shell
Other Contact Arrangements Available Upon Request.
Coaxial D-Sub Connector, Coaxial D-Sub with Mixed Layout, Coaxial D-Sub with Mixed with Full Layout,Coaxial D-Sub Male, Coaxial D-Sub Female
ShenZhen Antenk Electronics Co,Ltd , https://www.antenkcon.com