73.2: A Novel TFT Pixel and Driving Scheme of Electrically- Suppressed-Helix FLC for Active Matrix Flat Panel Display

2015 ◽  
Vol 46 (1) ◽  
pp. 1077-1080 ◽  
Author(s):  
Tsz Kin Ho ◽  
Man Chun Tseng ◽  
Abhishek Srivastava ◽  
Wei Zhou ◽  
Lei Lei ◽  
...  
Keyword(s):  
Flat Panel Display ◽  
Flat Panel ◽  
Active Matrix

Materials Used in Electroluminescent Displays

MRS Bulletin ◽  
1996 ◽  
Vol 21 (3) ◽  
pp. 49-58 ◽  
Author(s):  
P.D. Rack ◽  
A. Naman ◽  
P.H. Holloway ◽  
S-S. Sun ◽  
R.T. Tuenge
Keyword(s):  
Thin Film ◽  
Solid State ◽  
Liquid Crystal Display ◽  
Light Sources ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Luminance Change ◽  
Active Matrix ◽  
Human Interface ◽  
Improved Performance

The flat-panel-display (FPD) market is experiencing rapid growth due to increased demand for portable computers, communication equipment, and consumer electronic products. In all of these applications, the display is the primary human interface that conveys information. The size of the flat-panel-display market is presently estimated to be $10 billion/year and is projected to grow to over $18 billion/year by 1998. Although most current FPDs utilize either passive- or active-matrix liquid-crystal-display (LCD) technology, electroluminescent (EL) displays and light sources, because of their solid-state construction and self-emissive characteristics, can provide improved performance for many demanding display applications. Thin-film electroluminescent (TFEL) technology has been demonstrated over a broad range of display sizes from 1-in. to 18-in. diagonal with resolutions from 50 to 1,000 lines per inch. Also, because of its unique solid-state characteristic, TFEL technology is well-suited to provide a fully integrated display with the light-emitting element and electronics fabricated on the same substrate. An example of a full-color TFEL display is shown in Figure 1.Thin-film electroluminescent display panels are finding increasing applications in the FPD marketplace due to several fundamental performance advantages over LCDs. These include wide viewing angle, high contrast, wide operating-temperature range, ruggedness, and long lifetime. Alternating-current (ac)-driven monochrome TFEL displays (ACTFEL displays) have become the most reliable, longest running devices on the market. Commercial ACTFEL display panels have operated for more than 50,000 hours with less than 10% luminance change, the equivalent of 25 working years.

Flat Panel Display Substrates

1994 ◽  
Vol 345 ◽  
Author(s):  
Dawne M. Moffatt
Keyword(s):  
Thermal Expansion ◽  
Glass Substrate ◽  
Substrate Material ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Active Matrix ◽  
Thermal Expansion Coefficients ◽  
Field Emission Displays ◽  
Temperature Capability ◽  
Higher Temperature

AbstractThe performance of advanced flat panel displays is intrinsically linked to critical properties of the substrate material. In the manufacture of active-matrix liquid crystal displays (AMLCDs) and some emissive displays, there are certain process steps that require extreme conditions such as strong chemical washes and temperatures in excess of 600°C. As a result, the glass substrate used in these displays must be able to withstand these environments without degradation of its properties. It has become apparent that the flat panel display (FPD) manufacturers will benefit from substrates with improved acid durability, higher temperature capability, and thermal expansion coefficients consistent with other display materials.This paper focuses on one of the less-understood features of the glass substrate: the expansion characteristics as a function of temperature. Thermal expansion is important as it affects the compatibility of the glass with display materials, which, in the case of AMLCDs and some silicon-microtip field emission displays (FED), require an expansion close to that of silicon. In addition, thermal breakage during processing is directly proportional to the expansion coefficient.This study focused on the thermal expansion characteristics of two different FPD substrate glasses. The first one is code 7059, manufactured by Corning Incorporated and currently the standard in AMLCDs. A new substrate composition, Corning code 1737, with enhanced durability, temperature capability, and expansion tuned to the AMLCD applications will also be discussed.

scholarly journals An Active Matrix Flat Panel Dosimeter (AMFPD) for in-phantom dosimetric measurements

2005 ◽  
Vol 32 (2) ◽  
pp. 466-472 ◽  
Author(s):  
Jean M. Moran ◽  
Donald A. Roberts ◽  
Teamour S. Nurushev ◽  
Larry E. Antonuk ◽  
Youcef El-Mohri ◽  
...  
Keyword(s):  
Flat Panel ◽  
Active Matrix

scholarly journals Optimal Color Lighting for Scanning Images of Flat Panel Display using Simplex Search

2018 ◽  
Vol 4 (11) ◽  
pp. 133
Author(s):  
HyungTae Kim ◽  
EungJoo Ha ◽  
KyungChan Jin ◽  
ByungWook Kim
Keyword(s):  
Image Quality ◽  
Light Source ◽  
Light Emitting Diode ◽  
Optical Filters ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Light Emitting ◽  
Simplex Search ◽  
Inspection Systems ◽  
Color Control

A system for inspecting flat panel displays (FPDs) acquires scanning images using multiline charge-coupled device (CCD) cameras and industrial machine vision. Optical filters are currently installed in front of these inspection systems to obtain high-quality images. However, the combination of optical filters required is determined manually and by using empirical methods; this is referred to as passive color control. In this study, active color control is proposed for inspecting FPDs. This inspection scheme requires the scanning of images, which is achieved using a mixed color light source and a mixing algorithm. The light source utilizes high-power light emitting diodes (LEDs) of multiple colors and a communication port to dim their level. Mixed light illuminates an active-matrix organic light-emitting diode (AMOLED) panel after passing through a beam expander and after being shaped into a line beam. The image quality is then evaluated using the Tenenbaum gradient after intensity calibration of the scanning images. The dimming levels are determined using the simplex search method which maximizes the image quality. The color of the light was varied after every scan of an AMOLED panel, and the variation was iterated until the image quality approached a local maximization. The number of scans performed was less than 225, while the number of dimming level combinations was 20484. The proposed method can reduce manual tasks in setting-up inspection machines, and hence is useful for the inspection machines in FPD processes.

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