The WAVE Report
Issue #0809------------------7/25/08

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0809  SID 2008

0809.1  Touch Technology Everywhere

0809.2  One Laptop per Child (OLPC) on the Design of the PC

0809.3  AMLCED World Domination: Does Anything Stand in the Way

0809.4  3D Cinema

0809.5  3D Display Panels

0809.6  Other Display Technology

0809.7  WAVE Comments

0809  SID 2008
By John Latta

Los Angeles, CA
May 20-23, 2008

Society for Information Display (SID) is the conference for the display industry. It is both technical and exhibition. The society was started over 50 years ago in the Los Angeles area. Now the industry has moved to Asia where all the fab facilities are for AMLCD, PDP and OLED. There is very little display technology left in the US. But still SID seems to keep its place. The attendees are dominated by Asians who come long distances to give and hear papers. Yet, as with most global industries the multi-cultural attendees all seem to blend into the event. There is at least one common denominator – all are trying to make money.

0809.1  Touch Technology Everywhere

Touch is in. We sought some understanding about who was offering what.


ATP in-cell 4.3” in cell projective capacitive multi-touch touch panel. Stated 70 to 80Hz update rate. 8”for sale with 12” under development.

     Sensor: In-cell Projected Capacitive
     Multi-touch capable

     480X272 (?)
     Sensor: In-cell voltage sensing
     Multi-touch capable but only Stylus or Nail


     Outline for technology under development.
     Sheet overlay on LCD panel
     Capacitive. Based on ITO wires on the touch panel
     Drivers not shown.
     Example display shown in booth with no details.


52” multi-touch screen with integrated multi-touch. Supports gesture recognition. Similar of not the same panel shown at CES 2008.

          1920 X 1080
          Touch Recognition: Dual Points, Area and Gesture
          Sensor: IR – integrated into bezel
          Touch Response: 90Hz
          Input: Finger, Pen and Handwriting.

     4.3” WVGA MTSP
     LTPS Process technology
     Sensor: capacitive

     7” WVGA
     800 X 480
     Sensor: 4wire resistive touch screen

     7” WVGA TSIC
     a-Si Process technology
     800 X 480
     Color: 6 bit
     Sensor: In cell photo sensor


Uses Digital Waveguide Touch proprietary technology which scans the above the panel to detect touch. Picks up shadow of touch and shows the area coverage of the touch. Able to detect single touch but determines multi-touch by the size of the shadow. Claims able to detect 4 touch from the same hand on a new panel being developed. Working only on small and medium panels as “this is where the market is.” Concedes that doing larger panels would be a problem with multi-touch.


     82” Ultra Definition LCD with integrated e-Board which is based on IR. Supports Multi-touch.

     Multi-vision Multi-touch panel consisting of 4 panels side by side. Image sensor used. Supports 2 touch
     points per panel. 82” diagonal.

     12.1” WXGA display with integrated touch sensor and the readout driver ICs were embedded in the panel.
     Supports both pen and multi-touch.

          Sensor resolution same as display resolution
          Sensor Update rate: 360Hz.
          Process: a-Si
          Touch Sensor: Touch on screens shorts two contacts embedded in TFT panel. Paper given at SID.
          Application: Notebooks

     This panel is based on 2X2 42” panels which each have:

          1920 X 1080 resolution
          Up to 1 – 2 touch points at a time
          60Hz sensor response

Seiko Epson

     In a paper Seiko Epson described an active matrix in-cell capacitive sensor. One of the disadvantage of a
     passive matrix capacitive sensor is the cross coupling between cells. This makes the cell suitable for large
     objects but not small ones, like a stylus. The active matrix sensor has a single capacitive cell per pixel
     and operates on detecting differences between touched and non-touched states. The design can support stylus
     and makes for more reliable touch detection. A panel was built with the following characteristics:

          312 X 232
          Process technology: LTPS
          Display frame rate: 60Hz
          Sensor: 156 X 156
          Sensor update rate: 30f/s

     Seiko Epson was asked about the panel performance. It is poor for multi-touch, it has the advantage of not
     requiring additional process steps, can scale to large panels and the sensor update rate needs to be synced
     to the display rate, i.e., 120Hz panel would have a 60Hz sensor update rate.


     8.5” Wide VGA touch panel
     800 X 640
     Resistive touch panel

     10.4” XGA touch panel
     1024 X 768
     LED backlight
     Resistive touch panel


     Projective capacitive add on touch panel. Did not do Apple iPhone but has gain significant market response
     as a result of Apple’s use of the same technology. Current touch processor uses 8015 and will support
     large panels – booth panel approximately 40”. Update rate 9ms but this is the limit of the current
     processor. Going to ARM processor which will be available in October. Significant improvement in
     performance. Able to offer larger panels or able to embed more wires in the pane for higher resolution.

     Reason for large panel support is digital signage market. Lots of buzz but remains to be seen if this is
     a real market.


0809.2  One Laptop per Child (OLPC) on the Design of the PC

Mary Lou Jepsen, the co-founder of the OLPC initiative spoke of her experience in the development of the XO computer. Several observations from the talk:

     This effort is the first major reexamination of the PC architecture since the original IBM PC.

     The display is the computer. This is based on a number of factors including the cost and performance.

     An example of the next generation XO was shown which was announced that day. The XO is based on a foldable
     design where the keyboard is virtual based on a display on both sides. Price point is claimed to reach
     down to $75.


0809.3  AMLCED World Domination: Does Anything Stand in the Way

This was an evening panel discussion on the relative merits of: AMLCD, plasma, projectors and OLED. It was a fun and passionate series of short talks.

     Given the domination of AMLCD panels most of the arguments were made why it could not achieve

     Plasma – LCD fabs are much too expensive. The latest fabs are costing over $3B. Plasma fabs are far more
     cost effective.

     Projector – No all displays fit every market. In the microprojector market there is no way AMLCD can meet
     these needs. When it comes to a high quality, bright and cost effective display projectors cannot be beat.

     OLED – AMLCD have a big drawback – the mercury in the backlights. In the green situation this will be
     increasingly unacceptable.


0809.4  3D Cinema

A 3 hour session was held on the emergence of 3D cinema which will come in 2008 and 2009. Many clips were shown. The imagery was stunning. Presentations from 3 studios were made by Dreamworks, Sony Pictures and 3ality. 3ality did a 3D recording and video on a U2 concern of which 3 long clips shown. Dreamworks showed an internal clip on Kung Fu Panda. The visualization was superb. All the speakers commented that this technology is possible because of the advancements in digital cinema from the production to the digital theaters. RealD has a major lead in the movement of this market into the theaters. Some statistics provided include: Real D has:

     97% of the screens in the US
     90% of the screens in the world.
     1225 theaters today, 750 on order
     A deal was just announced with Regal Theaters, for
     1500 additional screens

Thus, we will see theaters near you having 3D cinema soon. Dreamworks is only doing 3D pictures going forward.

The appeal to the audience is that the industry needs good solutions for home 3D. This begins with the home theater and will eventually go to the display panels. In the Samsung booth was one large screen LCD panel which is autostereoscopic.


0809.5  3D Display Panels


     Requires polarized glasses
     Resolution: 2D – 1920 X 1080
     Resolution 3D – 1920 X 540
     Viewing distance 1 – 4m
     Colors – 10bit


     1920 X 1080
     Viewing Distance: 3 – 4m


0809.6  Other Display Technology


     LCD TFT with Double Sided Display
     Application for Digital Signage

     1920 X 1080
     LCD TV with LED Backlight
     Ultra-Slim - <10mm
     Mercury and Lead Free

     Display Frame rate: 60Hz
     Process Technology: p-Si
     Silicon on Glass

          Gate driver
          Source driver
          Timing controller
          Reference driver
          VCOM driver


     Quad Full HD TV
     Color 8 bit
     6.5ms Gray to Gray

     Ultra-Slim – 3.7mm
     Backlight: LED


     4” Flexible AMOLED
     Process technology: a-Si
     Materials: Phosphorescent OLED
     Bending Radius: 2”
     Thickness: .25mm


     AMOLED display
     ½ size is like a cell phone
     Booth demo include continuous folding operations.

     10bit color

     5” AMOLED
     800 X 480

     2” AMOLED
     Application: Electronic Passport
     Download content
     Slim and Bendable Display
     Developed with Bundes Druckerei

     3.1” AMOLED
     480 X 800
     Mounted on a Glove to Illustrate Use

     1920 X 1080

     52” LCD
     1920 X 1080
     Narrow Bezel
     Shown in a 4(V) X 2(H) configuration
     Application: Digital Signage

     14.3” Electrophoretic Color
     Quasi-256 gray
     Color Gamut: 5% ntsc
     Contrast ratio
     In spite of the poor specs. This is the best
     color epaper display seen.


0809.7  WAVE Comments

There is no winning touch technology at SID. The support for touch varied from single touch, multi-touch, stylus, to finger nail. We saw no multi-individual multi-touch.

There is a significant emphasis on small panels, in part, because the scaling to large panels has not happened. Yes, LG and Samsung did have large panels but the touch technology was external to the display panel. The small touch integrated panels favor the cell phone and PMP markets. But it is not clear that the technology developed here will scale or even work well with large panels.

From the show floor, as a whole, the expectations for digital signage are significant. This fits the adage – where is life after television? The answer is in signs everywhere and digital signage is that next great hope. But the linkage of large display panels and touch is just beginning to happen. We would hardly call what was at SID for touch digital signage, ready for installation.

Our take away is that the FPD ecosystem is still coming to grips with the impact of touch requirements. We can only conclude that much research and product development lies ahead.

The state of OLED has for the last 5 years been the perennial next technology to emerge for the mass market. This is the standing OLED joke. But we did see a difference at SID.

OLED is still a technology to watch. But at SID we saw important progress. If OLED becomes a player in the touch market there are many interesting possibilities.

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