University:
California State University, Northridge
Course:
COMP 222 | Computer Organization
Academic year:

2024
Views:

449

Pages:

23
Author:

Daneshfarnjp

LCD Monitors CURRENT LCD’s Current Technology and Trends Business Aspect 1. Reasons for a sensitive market: I. Price sensitive demand – As price drops slightly sales go up sharply. II. Long time for production facilities to form. Recent History • 1999 – Very high demand for LCD • 2000 – Crash of computer market causes surplus. • Prices are slashed. Average 17” LCD Monitor Street price Quarter Average Price 1Q 2001 $1,148 2Q 2001 $1,003 3Q 2001 $887 4Q 2001 $781 1Q 2002 $773 2Q 2002 $757 3Q 2002 $735 4Q 2002 $676 Technology Aspect • 1. Display addressing. • 2. Analog VS digital signal handling. • 3. Display Uniformity and Viewing Angle . Active VS. Passive Display Active Display Passive Display TFT (Thin Film Transistor) Analog VS Digital signal handling • On most graphic card signal goes through DAC (digital to analog converter) to convert to Analog signal. • LCD must convert the signal back to digital to determine which pixel to light. • If conversion has error the result is "pixel jitter", in which the image seems to shimmer or move. Improved Signal Handling • 1. DVI (digital video interface) standard was adopted. • i. DVI handles both analog and digital signals with separate connectors • 2. controlling circuitry became substantially better in a very short time. Display Uniformity Backlight • Early LCD backlight wasn’t uniform and “hot spots” were created. • Display manufacturers developed more sophisticated diffusing materials. Viewing Angles • Improving Viewing angels can be done by changing cell design. • Three different cell designs. 1. Vertical alignment (VA). 2. In-plane switching (IPS). 3. Multi-domain. LCD Future Trends LCD Future Trends • Short & Long Term Prices • 3 Important Ergonomic Features • LCD Monitor Quality • New Technologies LCD Future Trends • Lower LCD Prices in the Short Term – The Dock Works Strike – The Slow Economy – More Factories Online LCD Future Trends • Lower Prices in the Long-Term – Calculators, CRTs, VCRs and DVD Players were all very expensive at first – They now sell at lower prices because of the laws of supply and demand – What do they have in common with LCDs? – The are all electronic devices – So if the laws of supply and demand continue to apply, LCDs will sell for less in the long-term LCD Future Trends • Lower Prices in Long-Term (continued) – Example of an LCD going down in price • IBMs T220 LCD monitor cost about $50,000 when it first came out • Oct 2001 – it costs: $22,000 • Dec 2001 – it costs: $15,999 • May 2002 – it costs: $8,400 (T221) LCD Future Trends • Three Important Ergonomic Features – Large Viewing Angles • All LCDs approaching 170° both horizontal & vertical – Minimal Reflection and Glare • Sharp’s AGLR screen coating which forms a quarterwavelength filter that cancels reflection rather than diffusing it as other do. – Thin Bezels • When working with multiple monitors, your eyes don’t jump past wide gaps – thus less eye strain LCD Future Trends A workstation where all three of these ergonomic features are useful LCD Future Trends • LCD Monitor Quality – Backlights • The only thing that can wear out • There are more LCDs with 50,000 hour life spans – Zero-Voltage Black • lessens impact of non-functioning subpixals LCD Future Trends • New Technologies – On-Glass Circuitry unveiled Oct. 22, 2002 • The new screens use Sharp’s CGS (continuous grain silicon) • Microprocessor circuitry applied directly on the glass, enabling it to function like a computer • Produces ultra fine resolutions LCD Future Trends • New Technologies (continued) – ThinCRTs from Candescent Technologies • quarter-inch thin form factor: a "thin CRT." • Thousands of emitters instead of a single large cathode tube • Has the best of both CRTs and LCDs LCD Future Trends • ThinCRT from Candescent Technologies