83‐1: Invited Paper: Optimization of High Performance Deep Red OLEDs Using Tandem Structure for Automotive Lighting Application

2020 ◽  
Vol 51 (1) ◽  
pp. 1247-1250
Author(s):  
Huiqing Pang ◽  
Liang Gao ◽  
Menglan Xie ◽  
Nannan Lu ◽  
Ray Kwong ◽  
...  
Keyword(s):  
High Performance ◽  
Automotive Lighting ◽  
Tandem Structure ◽  
Red Oleds ◽  
Lighting Application

A novel tetraphenylsilane–phenanthroimidazole hybrid host material for highly efficient blue fluorescent, green and red phosphorescent OLEDs

2015 ◽  
Vol 3 (17) ◽  
pp. 4394-4401 ◽  
Author(s):  
Dong Liu ◽  
Mingxu Du ◽  
Dong Chen ◽  
Kaiqi Ye ◽  
Zuolun Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Carrier Transport ◽  
Host Material ◽  
Highly Efficient ◽  
Red Oleds

A novel organosilane compound Si(PPI)2 with good carrier-transport ability has been used as an efficient host for high-performance fluorescent pure-blue and phosphorescent green/red OLEDs.

scholarly journals 38.1: Invited Paper: High Performance Deep Red Three‐Unit Tandem OLEDs for Automotive Lighting Applications

2021 ◽  
Vol 52 (S1) ◽  
pp. 264-267
Author(s):  
Huiqing Pang ◽  
Menglan Xie ◽  
Liang Gao ◽  
Nannan Lu ◽  
Qiang Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Automotive Lighting

High-Performance CLL Resonant Multi-Channel LED Driver for Lighting Application

2018 ◽  
Author(s):  
Wesley Poh Qi Tong ◽  
B.M.S. Muhammad Ramadan ◽  
Thillainathan Logenthiran ◽  
R.T. Naayagi ◽  
Wai Lok Woo ◽  
...  
Keyword(s):  
High Performance ◽  
Led Driver ◽  
Lighting Application

Pulse Density Modulation Flyback Converter for LED Automotive Lighting

2017 ◽  
Vol 8 (1) ◽  
pp. 85
Author(s):  
Shinde Rohit ◽  
Ramachandiran Gunabalan ◽  
Mehtra Pavan Kumar
Keyword(s):  
High Performance ◽  
Light Emitting Diode ◽  
Current Control ◽  
Modulation Scheme ◽  
Flyback Converter ◽  
Automotive Lighting ◽  
Pulse Density ◽  
Driver Circuit ◽  
Density Modulation ◽  
Pulse Density Modulation

<p><em> </em><em>Switched mode power supply (SMPS) converter is a dc-dc power electronic converter which is used to step up or step down the dc output voltage. A dimmable driver circuit for Light Emitting Diode (LED) lamp for automotive lighting with dimming feature is used in this paper. A flyback converter is used as a driver circuit operated in discontinuous conduction mode to perform dimming control of LEDs. High overall circuit efficiency is achieved by regulating the current through the LED lamps using pulse density modulation scheme.</em><em> The </em><em>LED driver circuit design and operating principle is discussed in detail. A gentle current control feature is achieved by pulse density modulation technique. The high performance driver circuit is designed for 25 W LED lamps.</em><em> </em></p>

8‐1: Invited Paper: Development of High‐Temperature Stable Red OLEDs for Automotive Lighting

2020 ◽  
Vol 51 (1) ◽  
pp. 83-85
Author(s):  
Marina Kondakova ◽  
Juergen Eser ◽  
Michael Buechel ◽  
Joerg Knipping ◽  
Florian Lindla ◽  
...  
Keyword(s):  
High Temperature ◽  
Automotive Lighting ◽  
Red Oleds

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Prospects for convergent beam electron diffraction with a 200kV cold field-emission transmission electron microscope

1991 ◽  
Vol 49 ◽  
pp. 466-467
Author(s):  
J W Steeds ◽  
R Vincent
Keyword(s):  
Field Emission ◽  
High Performance ◽  
Small Diameter ◽  
Convergent Beam Electron Diffraction ◽  
Zone Axis ◽  
Medium Voltage ◽  
Transmission Electron ◽  
Good Crystallinity ◽  
Special Modification ◽  
Convergent Beam

We review the analytical powers which will become more widely available as medium voltage (200-300kV) TEMs with facilities for CBED on a nanometre scale come onto the market. Of course, high performance cold field emission STEMs have now been in operation for about twenty years, but it is only in relatively few laboratories that special modification has permitted the performance of CBED experiments. Most notable amongst these pioneering projects is the work in Arizona by Cowley and Spence and, more recently, that in Cambridge by Rodenburg and McMullan.There are a large number of potential advantages of a high intensity, small diameter, focussed probe. We discuss first the advantages for probes larger than the projected unit cell of the crystal under investigation. In this situation we are able to perform CBED on local regions of good crystallinity. Zone axis patterns often contain information which is very sensitive to thickness changes as small as 5nm. In conventional CBED, with a lOnm source, it is very likely that the information will be degraded by thickness averaging within the illuminated area.

Sign in / Sign up

Export Citation Format

Share Document