Difference between revisions of "Display Technology"

From esoterum.org
Jump to: navigation, search
Line 57: Line 57:
 
=== Organic Light Emitting Diode (OLED) ===
 
=== Organic Light Emitting Diode (OLED) ===
  
== Display Power ==
+
= Display Power =
 
*(1.1) [http://atrak.usc.edu/~massoud/Papers/CBCS-date04.pdf Pedram, Cheng, Hou, ''Power Minimization in a Backlit TFT-LCD Display by Concurrent Brightness and Contrast Scaling'', 2004]
 
*(1.1) [http://atrak.usc.edu/~massoud/Papers/CBCS-date04.pdf Pedram, Cheng, Hou, ''Power Minimization in a Backlit TFT-LCD Display by Concurrent Brightness and Contrast Scaling'', 2004]
 
::LCD greyscale single pixel power consumption formula
 
::LCD greyscale single pixel power consumption formula
Line 80: Line 80:
 
*[http://ieeexplore.ieee.org.ezproxy1.lib.asu.edu/iel5/16/27160/01206898.pdf?tp=&arnumber=1206898&isnumber=27160 Jagar, Cheng, Zhang, Wang, Poon, Kok, Chan, ''A SPICE Model for Thin-Film Transistors Fabricated on Grain-Enhanced Polysilicon Film'']
 
*[http://ieeexplore.ieee.org.ezproxy1.lib.asu.edu/iel5/16/27160/01206898.pdf?tp=&arnumber=1206898&isnumber=27160 Jagar, Cheng, Zhang, Wang, Poon, Kok, Chan, ''A SPICE Model for Thin-Film Transistors Fabricated on Grain-Enhanced Polysilicon Film'']
  
=== Active Matrix (Thin Film Transistor, TFT) ===
+
== Active Matrix (Thin Film Transistor, TFT) ==
  
 
*[http://ieeexplore.ieee.org/iel5/2220/29452/01335004.pdf?arnumber=1335004 Guo, Silva, ''Circuit simulation of current-modulated field emission display pixel driver based on carbon nanotubes'', Electronics Letters, September 2nd, 2004]
 
*[http://ieeexplore.ieee.org/iel5/2220/29452/01335004.pdf?arnumber=1335004 Guo, Silva, ''Circuit simulation of current-modulated field emission display pixel driver based on carbon nanotubes'', Electronics Letters, September 2nd, 2004]
Line 89: Line 89:
 
*[http://msdn2.microsoft.com/en-us/library/ms918695.aspx Display Buffer Formats, MSDN Library]
 
*[http://msdn2.microsoft.com/en-us/library/ms918695.aspx Display Buffer Formats, MSDN Library]
  
== Image Quality ==
+
= Image Quality =
 
*[http://www.cns.nyu.edu/~zwang/files/papers/quality_2c.pdf Universal Image Quality Index]
 
*[http://www.cns.nyu.edu/~zwang/files/papers/quality_2c.pdf Universal Image Quality Index]
 
*[http://www.cns.nyu.edu/~lcv/ssim/ The Structureal Similarity (SSIM) Index for Image Quality Assessment]
 
*[http://www.cns.nyu.edu/~lcv/ssim/ The Structureal Similarity (SSIM) Index for Image Quality Assessment]

Revision as of 18:50, 7 April 2007

Project Documents

Paper Search

"LCD power model" search on ACM

Display Technologies

General

Liquid Crystal Displays (LCD)

Flexible Displays

Electrophroetic Displays (EPD)

Some current characterization for electrophoretic suspension fluid.
Addressing. With a display thickness of 50micrometer and an average dielectric constant of 5.0, the capacitance per element would be ~0.055 pF.
EPD driver information and pixel level model
Section 3. To compensate for the leakage current, the storage capacitor must be very large; here, the capacitance is 34 pF. A polysilicon TFT is preferable to an amorphous silicon TFT for the switching transistor, because the large capacitor must be charged during the short pixel selection period.
EPD driven to produce greyscale
I. ...we have reported the world's first active-matrix EPD at an international electron device meeting (IEDM 2000)[12]. Since then, a few displays combining TFTs and microencapsulated electrophoretic materials have also been introduced [13]-[16].
I. Microencapsulated electrophoretic material in this EPD was driven by poly-Si TFTs fabricated with a low temperature process...

Colloidal suspension physics

Reflective Cholesteric Displays (ChLCDs)

Electro-wetting displays

Organic Light Emitting Diode (OLED)

Display Power

LCD greyscale single pixel power consumption formula
Addresses independant scaling of three color LED backlights based on image histogram
3.1: Whenever there is a screen change, the processor generates new data for the changing screen pixels and stores them into the framebuffer. This implies a higher energy consumption with increased temportal changes in the screen. Meanwhile, to maintain a screen on the LCD, the LCDC must sequentially read screen data from the frame-buffer and refresh the LCD pixels even when there is no screen change.
3.1: The display itself consists of several parts: LCD power circuitry, a front light, and an LCD. The LCDs used in the systems we studied are color active thin film transistor (TFT) LCDs. In such LCDs, each pixel has three comonents: R, G and B, signifying red, green and blue, respectively. Liquid crystals for each component are independently oriented by two polarizers, which are connected to a storage capacitor. The capacitor is in turn charged and discharged through a TFT to accommodate screen changes. Moreover, the capacitor must be refreshed at a high rate to maintain an appropriate voltage across the polarizers so that the corresponding liquid crystals remain properly oriented.

Active Matrix (Thin Film Transistor, TFT)


Display Drivers

Image Quality


Last printed: 1.24