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Comparative HDTV Display Technologies
- 6. Large Screen Model Assortment by Size
- 7. Large Screen Model Offering by Display Type (30+")
- 15. 2006 LCD-TV BACKLIGHT REPORT BLU Unit Forecast by Lamp Technology Expected 40"-44" Opportunity Analysis of CCFL and Alternative Technologies
- 31. Image Quality Comparison Source: Widescreen Review Projection Optics Rainbows, Temporal/Spatial Dithering, Projection Optics Grayscale Compression, Projection Optics Temporal, Spatial Dithering Grayscale Compression Many Other Artifacts A+ A- B A- B A Viewing Angle A- A- B B-/C Dark Artifacts B A+ Motion Artifacts A A-/B- Dark Artifacts B+ Compression B/C APL B+ Compression A Grayscale A A- Color Qheel A B Phosphors B Sub-pixel Filters B Phosphors Color Accuracy B B+ B A/C APL A C ANSI Contrast A B C A/C APL C A+ On/Off Contrast A B C A C A+ Black Level A/B Lamp/Iris Control A/B Lamp/Iris Control A/B Lamp/Iris Control B A Backlight Control A Low Ambient A A A A/C APL A C Peak Brightness LCoS DLP HTPS Plasma LCD CRT
Editor's Notes
- Supply chain of the display industry. Business and technology — news, strategy and analysis Newsletters via subscription — some in the audience are already subscribers Arrives on pdf via email. Samples here: HDTV Retailer Also: In-depth technology reports Conferences, consulting
- Show of hands: How many own an HDTV? How many have shopped for an HDTV? How many have found the process confusing? Not surprised, I’ve written profiles of two retailers and purchased an HDTV of my own. 1280 x 720 — bend the rules for plasma
- CRT RP is dead. What has killed it is…
- So, let’s begin with CRT technology With us for over 50 years How it works… Electron-emitting cathode Deflection yoke Backcoated phospor screen/shadow mask
- Prospects are not the greatest Gradually all of the major manufacturers are leaving the business — led by the Japanese But…are there any new tricks for the aged CRT?
- Samsung, followed by LG has tried to breath new life into this aging technology. The slim CRT remains a very cost-competitive alternative to flat panels.
- However, CRT has a lot to offer
- Transmissive active matrix TFT-LCD panels have been with us since the first laptops. They just keep growing larger. Technology analysts have been hot on this direction for some time.
- Dramatic cost reductions are expected to continue
- Successive generations of LCD fab has used larger and larger substrates Much of the current production is on G6 and G7 for larger sizes Some discrepancy between LCD manufacturers as to exact sizes Recently announced LG.Philips — 8G at 2200 x 2500 (vs. 2160 x 2400 or 2460) 18 up at 32”; 8 up at 47”; 6 up at 55” Adds to existing list — see next slide
- Major manufacturers vie to leapfrog each other in production capacity and size Billions in strategic investments come at short-term profitability — a game for deep pockets
- How does it work? Like CRT, electron beam at each pixel excites a phosphor Longstanding favorite of consumers — go into retailer and ask what’s hot Under recent challenge from alternative technologies
- Plasma has captured the consumers’ fancy Despite lack of resolution, retains high contrast as small feature sizes: CONTRAST AS A FUNCTION For the videophile, however: besides lack of resolution, pixel fill factor peak brightness compression in bright scenes More in final summary
- Still not quite HD resolution — what’s cost effective today Larger sizes up to 80” available, but costly ($40K) 103” plasma shown at CES (LG, Samsung) — no specific product plans
- Popularity has spawned continued investments in plasma manufacturing
- When size really matters… Air is cheap Components: imagers (.5 to 1 in.) & drive electronics, optical engine, mirror, enclosure and screen Can microdisplays be made in high volume with high yield to achieve promise of low cost?
- Transmissive LCD Microdisplay — High-temperature polysilicon First commercially successful microdisplay Good value at 50-60” The Sony version is the highest-selling RP display
- Field sequential: Inherently less efficient that 3-panel systems, color breakup Samsung — 6th-generation light engine/electronics design overcomes many artifacts Heavy promotion by Texas Instruments over many years TI has fostered IP in engine development as well — as a barrier to entry for other DMD competitors Advantage: does not require polarized light Wobulation (HP) — spatial dithering to achieve 1920 x 1080 Temporal dithering causes flickering in very bright or dark area
- DLP will continue to improve in picture quality Artifiact reduction Native 1080p
- The promise of LCoS has been much delayed.
- Is size important? How big is big enough?
- Condensed analyses of “Leading Technologies” — 3 direct view on left, 3 projection on right These results are a concensus of cross section — not my opinion (although I agree) Students Home theatre A/V professionals: installers, dealers, manufacturer reps Video experts
- When you do the math…
- Recommendations are based on what is perceived as “affordable,” as well. — that’s changing Perceived image quality — a larger picture will show artifacts and look less sharp But with improved image processing and content delivered in 1080p, most consumers HDTVs will be undersized. With respect to image quality, let’s look at where we stand…
- Analogous to Shannon-Hartley Theorem in telecom where channel capacity is proportional log (S/N) times the bandwidth. If someone tells you they don’t have the bandwidth to do something…
- Digital content - capture optics, imager, encoding Projector - decoding inaccuracies, imager response All act in a multiplicative way, if less than 100%
- There is a great deal of opportunity in display electronics.
- Hand gesture “call me.”