∆t = T/N for 60 Hz, T = 16.7 ms for N = 480 rows, ∆t = 35 µs
Slow response of some pixel technologies limits the maximum display size and reduces the display contrast.
(from Curtin & Infante)
6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 6
Active Matrix Addressing In contrast to passive matrix technology, active matrix technology first loads the pixel values into the circuit behind each pixel and then displays the information during the entire frame time, T. (new pixel information is loaded while the present information is displayed) Pixels are “on” during the entire frame time so we can run them dimmer as compared to passive matrix. 6.976 Flat Panel Display Devices – Spring 2001
(from Curtin & Infante) Lecture 6
Slide 7
Inorganic Thin Film EL
FPDs in Medicine (ultrasound, CAT scans, and x-rays)
FPDs for Instrumentation and Industrial Applications (imaging, control-room, and process-control applications) Mitsubishi Electronics America, Inc.
6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 8
Characteristics of Thin Film Electroluminescent (TFEL) Displays
6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 9
TFEL Device Structure and Circuit Model
6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 10
Simple TFEL Mechanism
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 11
TFEL Luminance vs. Voltage Characteristics Operate the TFEL Displays in the AC mode to avoid charging and consequent loss of luminance
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 12
Flat Pane Displays – Power Comparison
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 13
Characteristics of Efficient TFEL Phosphors HOST
ACTIVATOR
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 14
TFEL Phosphors – Performance Summary
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 15
Characteristics of Ideal TFEL Insulator Materials
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 16
TFEL Monochrome Display Structure
Simple structure: - five films - two photomasks 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 17
Thin Film Electroluminescent Display
6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
by Planar
Slide 18
TFEL Dark Electrode for High Contrast Displays Reflective Back Electrode
Dark Electrode
Faceplate glass not shown (from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 19
Multicolor TFEL
with
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 20
Typical Monochrome TFEL Display Specifications • Operating temperature range
-40 to 85ºC
• Viewing angle
> 160º
• Contrast
> 40:1 at 500 lux (with dark electrode)
• Shock and Vibration
100g/4~6ms, 3 axis 20 to 500 Hz, 0.02 g2/Hz
• Life
> 50,000 hrs (typical)
• Decay time
< 0.6 ms
• Resolution
> 80 lpi
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 21
Comparison of TFEL and AMEL Display Structures
TFEL
AMEL
- passively addressed -
- actively addressed -
(from Green & Haven) 6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 22
The World’s Smallest High Performance, Low Cost AMLCDs - VGA (640x480) resolution - 22 ft-lamberts (to the eye through the lens) - display area 5.76 x 7.68 mm
(developed by Planar)
6.976 Flat Panel Display Devices – Spring 2001
Lecture 6
Slide 23
Characteristics of Active-Matrix EL Displays Miniature High Resolution Displays for Head Mounted Displays and Personal Viewers
- up to 2000 lines per inch - self-illuminating (no back light) - compact:
Load Lock. Materials Growth Laboratory. III-V MBE. Load Lock. Transfer .... 5.7eV. Alq. 3. 2.7 eV electrons exciton trap states low work function cathode.
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polymers with only alkyl and aryl side groups bound by direct P C bonds. To ..... In contrast, very few examples of polymers with ferrocene units in close prox-.
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Therefore, it is necessary to calculate the consumption of what is going to be connected (LEDs, strip of LEDs) so as not to exceed the recommendations.
... (invariant radius). The combined effect of ... also shares the motion of the frame, and thus motion organizations ... walker, the parts of the body are rigid and connected, but they are not rigid .... Borjesson and von Hofsten concluded that peop
and at contrasts higher than 50% the reduction in luminance is severe (more than. 5%) even for gratings with ..... Discrete Fourier analyses of oriented stimulus displays, J. Math. Psychol. 42, ... Engineering 3, 2374 â 2382. Peli, E. (2001).
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coordination, and SâHgâS angle in homoleptic Hg(II)-thiolates were calculated from .... value of the Hg(SR)3 complex is preserved by lengthening the third bond ...
ability to update objects and scenes across views (e.g.,. Huttenlocher & Presson ..... At the end of the first condition, the array/object was arranged into a new ...
Weigh the residual TiO2. [JCS 2773 1952; JOC 14 655 19491 ...... It is a POISONOUS white powder which becomes black on standing if Mg(OH)2 and carbonate ...
environment, and questionnaire ... Presence. Page to appear. Test environment. The tests also show that the user cannot interact normally with the VE if ...
his review Reinhardt-Rutland suggests a future area of pos- sible research ..... on manual aiming at memorized directions of stationary targets. Perception, 22 ...
This program displays the contents of the bootstrap ROM in a Motorola ... fetch a byte from the bootstrap area, invert it and display on 8 LEDs loop: lda ... Page 3 ...
Spectroquant phosphorus test set (from E. Merck, Darmstadt, Germany) composing of : 1) ammonium ... Add 5 ml 12 H2SO4 to each crucible. They are then put ...
Aluminium bromide [7727-15-31 M 266.7, m 97O, b 114°/10mm. Refluxed and ... Major contaminants are water, oil and non-condensible gases. Most of these ...
