A SELECTIVE LOOK AT SID DISPLAY WEEK 2015 Paul Semenza - - PowerPoint PPT Presentation

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A SELECTIVE LOOK AT SID DISPLAY WEEK 2015 Paul Semenza - - PowerPoint PPT Presentation

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A SELECTIVE LOOK AT SID DISPLAY WEEK 2015 Paul Semenza psemenza@gmail.com 6/23/15 Paul Semenza 2 Questions triggered by SID What matters now in displays Not size What technologies are critical Materials and processes What might be

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SLIDE 1

A SELECTIVE LOOK AT SID DISPLAY WEEK 2015

Paul Semenza psemenza@gmail.com

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SLIDE 2

Questions triggered by SID

What matters now in displays

  • Not size

What technologies are critical

  • Materials and processes

What might be coming

  • Integration, form factors, conformability,

manufacturing approaches

…and a related development

6/23/15 Paul Semenza

2

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SLIDE 3

Less size, more performance

Wider Color Gamut Higher Resolution Flexible Thinner Non- rectangular

Paul Semenza

3

6/23/15

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SLIDE 4

Chinese panel makers catching up

6/23/15 Paul Semenza

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BOE talking about avoiding commoditization by moving up performance curve, not down price curve

Feng Yuan, BOE, Business Conference

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SLIDE 5

Some things haven’t changed!

Paul Semenza

5

6/23/15

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SLIDE 6

Questions triggered by SID

What matters now in displays

  • Not size

What technologies are critical

  • Materials and processes

What might be coming

  • Integration, form factors, conformability,

manufacturing approaches

…and a related development

6/23/15 Paul Semenza

6

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SLIDE 7

Ways to get to better performance

Color

Quantum dots OLED

Resolution

Oxide TFT LTPS w/in-cell

Form Factor

Oxide TFT Flexible OLED

6/23/15 Paul Semenza

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High levels of activity (papers, demos) around QD and oxide

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SLIDE 8

Quantum dots

6/23/15 Paul Semenza

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  • Rec. 2020 represents

an expansion in color gamut, which quantum dots are well-positioned to make happen – soon! Multiple ways QDs can impact the LCD stack

Jason Hartlove, Nanosys, Investors Conference

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SLIDE 9

Why oxide

TFT characteristics a-Si

  • xide

LTPS Mobility (cm2/V-s) <1 1-30 30-100 Uniformity good good

  • k

Reliability poor good good Vth shift >30 <1 <0.5 Mask steps 4 - 6 (7 for OLED) 4 - 6 5 - 9 Pixel circuit (OLED) 4T + 2C 2T + 1C 5T + 2C Process temp (°C) 150 - 350 450 250 - 550 Generation >10 8.5 6.5 - 8.5 Cost/Yield low/high low/high high/low

Paul Semenza

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6/23/15

Adapted from Toshio Kamiya, Short Course S-3

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SLIDE 10

Why oxide

6/23/15 Paul Semenza

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Sharp (63.1)

Good aperture ratio at very high resolution, enabled by transparency of oxide semiconductors

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SLIDE 11

Why oxide

6/23/15 Paul Semenza

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Sharp (59.1)

High mobility enables integration of gate drivers, eliminating bezel

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SLIDE 12

OLED + oxide

6/23/15 Paul Semenza

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18 inch WXGA AMOLED (IGZO) 0.18 mm thick; bend radius: 30 mm

LGD (65.1)

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SLIDE 13

OLED + oxide

6/23/15 Paul Semenza

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13.3 inch 8K (664 ppi) using CAAC-IGZO

Advanced Film Device/ Semiconductor Energy Laboratory (63.3)

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SLIDE 14

Oxide: printed inorganic TFTs?

6/23/15 Paul Semenza

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Antimony tin oxide and zirconium dioxide in sol-gel to create “inks” TFTs inkjet-printed UC Berkeley (39.1)

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SLIDE 15

But a-Si, LTPS not slowing down

6/23/15 Paul Semenza

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55 inch 8K (7680x4320) 120 Hz a-Si IPS Panasonic (72.1) Polysilicon TFTs produced at 150°C w/liquid silicon ink Delft Univ. of Technology, JAIST (29.1) 4.3 inch FHD LTPS, 0.9 mm thick AUO (4.3) 3.5 inch VGA a-Si AHVA LCD on plastic AUO (9.3) 8 inch 4K, in- cell touch JDI (63.2)

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SLIDE 16

Questions triggered by SID

What matters now in displays

  • Not size

What technologies are critical

  • Materials and processes

What might be coming

  • Integration, form factors, conformability,

manufacturing approaches

…and a related development

6/23/15 Paul Semenza

16

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SLIDE 17

3D user interface

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Surface, air detection; multitouch; gesture recognition; finger/stylus

Qualcomm (74.2)

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SLIDE 18

Integrating micro LEDs and TFTs

6/23/15 Paul Semenza

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Build 3D stack of red, green, blue LEDs on top of CMOS

Ostendo (26.1)

Build LED array, deposit a-Si thin film, laser crystallize to form TFTs

Lumiode (26.2)

Wafer bonding/ flip-chip: limited density Print SWCNT TFT backplane on top of LED array

Atom Nanoelectronics (P-151)

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SLIDE 19

Beyond flexibility: stretchability

6/23/15 Paul Semenza

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“meander structures” created on polyimide film LEDs assembled by pick and place onto circuit array

Panasonic, Holst Centre, imec (9.4)

Also, Bao group at Stanford (9.1), others investigating strechable polymer and CNT TFTs

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SLIDE 20

A new manufacturing approach?

6/23/15 Paul Semenza

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Adapted from John Rogers, Seminar M-11; X-Celeprint

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SLIDE 21

Re-starting manufacturing in the US?

6/23/15 Paul Semenza

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National Network for Manufacturing Innovation (so far) Coming Soon: Flexible Hybrid Electronics Integrated Photonics Clean Energy Revolutionary Fibers and Textiles http://manufacturing.gov/

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SLIDE 22

THANK YOU

psemenza@gmail.com

6/23/15 Paul Semenza

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