OLED - Organic Light Emitting Diode

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This report presents a brief introduction to OLED (organic light emitting diode) and technologies available for top emission OLED. A detailed taxonomy for OLED is presented covering parts of the type of OLED, material used, manufacturing, applications among others. A detailed landscape analysis of patent and non-patent literature is done with a focus on Top Emission OLED (TEOLED). The product information of major players in the market is also captured for OLED. The final section of the report covers the existing and future market predictions for OLED.

OLED Working Principle

Introduction

  • OLED technology was firstly developed in 1987 at Eastman Kodak Company by Tang and Van Slyke using small-molecule (sm-OLED). In 1990 Richard Friend, Jeremy Burroughes and Donal Bradley discovered electroluminescence capabilities from conjugated polymers so laying down the foundations for a new generation of flat panel displays.
  • The growing number of electronic devices using organic light emitting diode displays shows that after years of promise, the technology is increasingly finding place in many products. But while OLED displays might challenge LCDs as the screens of choice for smaller gadgets, the technology may not become mainstream for notebook PCs or TVs within this decade.
  • OLED displays use organic compounds that emit light when exposed to an electric current. They are brighter, have better contrast, offer wider viewing angles, use less power, and provide faster response times than liquid crystal displays. OLED screens' thickness is a third of that of LCDs, since they don't need a back-light, and that makes them a good fit for portable electronics devices.

Read More?

Click on OLED Background to read more about OLED.

Traditional light bulbs were invented more than 130 years ago. Since then the basic principle of creating light remains the same, although the design has been tweaked.An electric current passing through a tungsten wire causes it to heat up and glow white hot.Today, more than 20% of electricity used in US buildings is eaten up by lights and nearly half that amount is used by traditional, incandescent light bulbs. It has been a long-term goal of scientists to come up with something that would reduce this mammoth energy demand.

The OLEDs do not heat up like today's light bulbs and so are far more energy efficient and last longer.They also produce a light that is more akin to natural daylight than traditional bulbs. The new polymer uses a fluorescent blue material instead which lasts much longer and uses less energy.

Top Emission OLED: Search Strategy

The present study on the IP activity in the area of OLED with focus on Top Emission OLED (TEOLED) is based on a search conducted on Micropat.

Control Patents

S. No.
Patent/Publication No.
Publication Date(mm/dd/yyyy)
Assignee/Applicant
Title
1
US7791271B2
7/9/2010
 Global OLED Technology LLC Top-Emitting OLED Device With Light-Scattering Layer and Color-Conversion.
2
US7781961B2
08/24/2010
 Novaled AG Top Emitting, Electroluminescent Component With Frequency Conversion Centres.
3
US7002293B2
02/21/2006
 Eastman Kodak Company Organic Light Emitting Diode With Improved Light Emission Through The Cathode.
4
US6770502B2
3/8/2004
 Eastman Kodak Company Method Of Manufacturing a Top-emitting OLED display Device with Desiccant Structures.
5
US20080169757A1
07/17/2008
 TPO Displays Corp. Top-Emitting Organic Electroluminescent Display
6
US20060043373A1
2/3/2006
 Industrial Technology Research Institute Method for Manufacturing a Pixel Array of Top Emitting OLED.
7
US20050236629A1
10/27/2005
 Samsung Corp. Top Emission Organic Light Emitting Diode Display Using Auxiliary Electrode to Prevent Voltage Drop of Upper Electrode and Method of Fabricating the Same.
8
EP1489671A2
12/22/2004
 Global OLED Technology LLC Method of Making a Top-Emitting OLED device having Improved Power Distribution
9
EP1029336A1
08/23/2000
 Fed Corp. Top Emitting OLED with Refractory Metal Compounds as Bottom Cathode .
10
WO2001057904A1
9/8/2001
 Emagin Corp. Low Absorption Sputter Protection Layer for OLED Structure.

Patent Classes

S. No.
Class No.
Class Type
Definition
1
 257/40 USPC Active solid-state devices (e.g., transistors, solid-state diodes) /Organic semiconductor material
2
 257/E51.018 USPC Active solid-state devices (e.g., transistors, solid-state diodes) / organic solid state devices, processes or apparatus peculiar to manufacture or treatment of such devices or of parts thereof / structural detail of device / light-emitting organic solid-state device with potential or surface barrier
3
 257/E51.019 USPC Active solid-state devices (e.g., transistors, solid-state diodes) / organic solid state devices, processes or apparatus peculiar to manufacture or treatment of such devices or of parts thereof / structural detail of device / light-emitting organic solid-state device with potential or surface barrier / Electrode
4
 257/E51.02 USPC Active solid-state devices (e.g., transistors, solid-state diodes) / organic solid state devices, processes or apparatus peculiar to manufacture or treatment of such devices or of parts thereof / structural detail of device / light-emitting organic solid-state device with potential or surface barrier / Electrode / Encapsulation
5
 257/E51.021 USPC Active solid-state devices (e.g., transistors, solid-state diodes) / organic solid state devices, processes or apparatus peculiar to manufacture or treatment of such devices or of parts thereof / structural detail of device / light-emitting organic solid-state device with potential or surface barrier / Electrode / Arrangements for extracting light from device (e.g., Bragg reflector pair)
6
 257/E51.022 USPC Active solid-state devices (e.g., transistors, solid-state diodes) / organic solid state devices, processes or apparatus peculiar to manufacture or treatment of such devices or of parts thereof / structural detail of device / light-emitting organic solid-state device with potential or surface barrier / Multicolor organic light-emitting device (OLED)
7
 313/504 USPC Electric lamp and discharge devices/solid-state type/ with particular phosphor or electrode material / Organic phosphor
8
 H01L 27/28 IPC Semiconductor devices; electric solid state devices not otherwise provided for / devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate / including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
9
 H01L 27/32 IPC Semiconductor devices; electric solid state devices not otherwise provided for / devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate / including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part / with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes
10
 H01L 51/50 IPC Semiconductor devices; electric solid state devices not otherwise provided for / solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof / specially adapted for light emission, e.g. organic light emitting diodes (oled) or polymer light emitting devices (pled)
11
 H01L 51/52 IPC Semiconductor devices; electric solid state devices not otherwise provided for / solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof / Details of devices
12
 H01L 51/56 IPC Semiconductor devices; electric solid state devices not otherwise provided for/specially adapted for sensing infra-red radiation, light, electromagnetic radiation of shorter wavelength, or corpuscular radiation; specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation / Processes or apparatus specially adapted for the manufacture or treatment of such devices or of parts thereo

Concept Table

S. No. Concept 1 Concept 2
Top emission
Organic Light Emitting Diode
1
 top emitting oled
2
 top emissive polymer led
3
 top emission light emitting polymer diode
4
 toled organic led
5
 teoled organic electroluminescent diode
6
 foled
7
 sm-oled
8
 small molecule oled
9
 amoled
10
 pmoled

Micropatent Search Strategy

Database: Micropat
Patent coverage: US, EP, WO, JP, DE, GB, FR
Time line: 1836/01/01 to 2011/02/20

S. No.
Concept
Scope
Search String
No. of Hits
1
 Classes - OLED Any Classification H01L005150* OR H01L005152* OR H01L005156 OR H05B003308P OR 257E51.022 63152
2
 Classes - Organic Semiconductor Devices Any Classification 313504 OR 257040 OR 257E51.018 OR 257E51.019 OR 257E51.020 OR 257E51.021 OR H01L002728 OR H01L002732 27601
3
 Top Emission keywords Claims, Title or Abstract ((top emitting) OR (toled) OR (teoled) OR (te-oled) OR (top ADJ2 emitting) OR (top ADJ2 emissive) OR (top ADJ2 emission)) ADJ ((light ADJ emitting ADJ polymer) OR (organic ADJ electro-luminescence ADJ diode) OR (ORganic ADJ electroluminescent ADJ diode) OR (ploymer ADJ light ADJ emitting ADJ diode) OR (ORganic ADJ light ADJ emitting ADJ device) OR (self-luminous ADJ diode) OR (oled) OR (organic led arrays) OR (organic ADJ light ADJ emitting ADJ diode) OR (organic ADJ light ADJ emission ADJ diode) OR (polymer ADJ light ADJ emission ADJ device) OR (organic ADJ electroluminescent device) OR (oel) OR (oleds)) 1141
4
 OLED keywords Claims, Title or Abstract ((organic OR (small adj molecule*1) OR polymer*1) adj (lightemitting OR (light adj (emitting OR emission)) OR electroluminescen*2 OR (electro adj luminescen*2))) NEAR3 diode*1) OR oled*2 OR smled*2 OR pled*2 OR (light adj (emitting OR emission) adj polymer*1) OR ((organic OR (small adj molecule*1) OR polymer*1) NEAR3 led*2) 39392
5
 Top emissioin OLED keywords Claims, Title or Abstract (((((organic OR (small ADJ molecule*1) OR polymer*1) ADJ (lightemitting OR (light ADJ (emitting OR emission)) OR electroluminescen*2 OR (electro ADJ luminescen*2))) NEAR3 diode*1) OR oled*2 OR smled*2 OR pled*2 OR (light ADJ (emitting OR emission) ADJ polymer*1) OR ((ORganic OR (small ADJ molecule*1) OR polymer*1) NEAR3 led*2)) AND ((top ADJ3 (emissi*2 OR emitting)))) OR (te ADJ oled*2) 429
6
 Top Emission keywords AND OLED classes Combined query 1 AND 3 809
7
 LED Keywords Claims, Title or Abstract ((lightemitting OR (light ADJ (emitting OR emission)) OR electroluminescen*2 OR (electro ADJ luminescen*2)) NEAR3 diode*1) OR led*2 OR oled*2 OR smled*2 OR pled*2 1617014
8
 Top emission keywords AND Organic semiconductor devices classes AND Top emission keywords Combined query 2 AND 7 AND 3 224
9
 Top emissioin OLED keywords Full patent spec. (((((organic OR (small ADJ molecule*1) OR polymer*1) ADJ (lightemitting OR (light ADJ (emitting OR emission)) OR electroluminescen*2 OR (electro ADJ luminescen*2))) near3 diode*1) OR oled*2 OR smled*2 OR pled*2 OR (light ADJ (emitting OR emission) ADJ polymer*1) OR ((organic OR (small ADJ molecule*1) OR polymer*1) near3 LED*2)) near3 ((top ADJ3 (emissi*2 OR emitting)))) OR (te ADJ oled*2) 1506
10
 German Keywords Full patent spec. ((top adj3 (emissi*2 OR emitting)) OR (Top NEAR2 emittierende*1)) NEAR3 ((organische NEAR2 (led*1 OR Leuchtdiode*1)) OR (Licht adj emittierende adj Polymer*1) OR oled*1) 1430
11
 French Keywords Full patent spec. ((top ADJ3 (émissive OR émettant)) OR (démission ADJ top) OR (top ADJ3 (emissi*2 OR emitting))) NEAR3 ((diode*1 NEAR3 électroluminescente NEAR3 organique*1) OR ((Polymère*1 OR organiques) ADJ2 led*1) OR (polymère*1 NEAR3 émettant NEAR3 lumière) OR oled*1) 1412
12
 Combined query 5 OR 6 OR 8 OR 9 OR 10 OR 11 2113 (1132 unique)
13
 Control Patents Patent/Publication No. WO2001057904A1 OR EP1029336A1 OR EP1489671A2 OR US20050236629A1 OR US20060043373A1 OR US20080169757A1 OR US6770502B2 OR US7002293B2 OR US7781961B2 OR US7791271B2 10
14
 Combined query 12 AND 13 10

Scientific Literature Search

S.No
Database
Query
Limits by Date
No.Of Hit
1
 Google scholar (Top emitting or top emission or top emissive) and ((organic light emitting diode) or (polymer led) or (light emitting polymer led) or (OLED)) 1990-2011 1840

Search in Japanese database

Database: IPDL (Industrial property digital library), Japan

Date of search: 1900/01/01 to 2011/02/15

S.No.
Issue/Publication date
F-Term Theme
FI/F-term/Facet
Hits
1
 1900/01/01 to 2011/03/02 3K107 DD03*[AA01+BB01+BB02+BB03+BB04+BB05+BB06+BB07+BB08+DD01+DD04+DD42+DD50+CC01+CC02+CC04+CC06+CC07+
CC08+CC09+EE02+EE03+EE06+EE22+GG01+GG02+GG03+GG04+GG05+GG06+GG07+GG08+GG08] 		1596
  • F-Terms and theme used in search
Japanese F-term search
Definition
Sr. No.
 F- Term theme 3K107 Electroluminescent light sources
1
 F- Term AA01 Organic electroluminescent element.
2
 F- Term BB01 Used in displays.
3
 F- Term BB02 Used in Lights or light sources
4
 F- Term BB03 Used in Backlights or the like for liquid crystals
5
 F- Term BB04 Used in printer heads
6
 F- Term BB05 Used in lasers
7
 F- Term BB06 Used in designs or advertisements
8
 F- Term BB07 Used in timepieces
9
 F- Term BB08 Used in on-board use
10
 F- Term DD01 Having feature of all direction of light emission.
11
 F- Term DD03 Having top emission.
12
 F- Term DD04 Having double sided emission.
13
 F- Term DD42 Having Organic materials.
14
 F- Term DD50 Structured with Light emitting layers
15
 F- Term CC01 Having Light emitting layers
16
 F- Term CC02 Light emission characteristics were improved.
17
 F- Term CC04 Has an effect on brightness.
18
 F- Term CC06 Has an effect on efficiency
19
 F- Term CC07 Has an effect on colours.
20
 F- Term CC08 Has an effect on Colour purity; Colour temperatures; Light emission wavelengths, including UV
21
 F- Term CC09 Has colour balance feature
22
 F- Term EE02 Has white light emission.
23
 F- Term EE03 Display having Passive matrices
24
 F- Term EE06 Display having Active matrices
25
 F- Term EE22 Display having with RGB picture elements having different areas
26
 F- Term GG01 Dispaly having color filters.
27
 F- Term GG02 Apparatus for deposition
28
 F- Term GG03 Apparatus for dry methods
29
 F- Term GG04 Apparatus for chemical vapour deposition
30
 F- Term GG05 Apparatus for evaporation
31
 F- Term GG06 Apparatus for sputtering
32
 F- Term GG07 Apparatus for wet methods
33
 F- Term GG08 Apparatus for printing
34
 F- Term GG08 Apparatus for Inkjet

Taxonomy

Sample Analysis

Patent Analysis

A sample of 200 patents from the search is analyzed based on the taxonomy. Provided a link below for sample spread sheet analysis for Top Emission OLED.

S.No
Patent/Publication No.
Date of Publication
Assignee / Applicant
Title
Problem
Solution
1
US7692191B2
04/06/2010
 Samsung Mobile Display Co., Ltd. Top-emitting organic light emitting device In the conventional top-emitting organic light emitting device, each pixel electrode is designed to have a minimum width, and neighboring pixel electrodes are designed to be widely spaced apart from each other by as much as 17 .mu.m. Therefore, the wide space between the pixel electrodes leaks emitted light, thereby deteriorating the voltage-current characteristics of the thin film transistors i.e., increasing photo-leakage. In this patent the top-emitting organic light emitting device has maximized the width of a pixel electrode , thereby enhancing aperture ratio. Furthermore, the pixel electrode is arranged to overlap all thin film transistors, so that light is prevented from leaking through a space between neighboring pixel electrodes, thereby reducing photo-leakage of the thin film transistor.
2
US7554259B2
06/30/2009
 Sanyo Electric Co., Ltd. Light emitting display apparatus having excellent color reproducibility Organic electroluminescence panel obtains white light by synthesizing two lights each having complementary color to the other, and the three primary colors differ in luminous intensity. Therefore it is difficult to set chromaticity of white light to desired level. And even after color-filter transmission, red light and blue light will have stronger luminous intensity than green light. The present invention objective provide a light emitting display apparatus having excellent color reproducibility. Organic light emitting layer that synthesizes two or more complementary colors of light that are complementary to each other thereby producing white light. It has a resonant structure by which a resonant wavelength is set to a predetermined wavelength, and outputs the white light via the resonant structure where the predetermined wavelength substantially coincides with a wavelength corresponding to a primary color whose luminous intensity is uniform.With the stated construction, non-uniformity in luminous intensity among three primary colors is alleviated by means of amplified luminous intensity due to resonance. This will help obtain white light in which the primary colors are balanced well.
3
US7332859B2
02/19/2008
 Canon Kabushiki Kaisha Organic luminescence device with anti-reflection layer and organic luminescence device package In organic luminescence device, the transparent electrode is formed by a material of a refractive index higher than that of air or nitrogen, constituting the external environment of the organic luminescence device. Therefore, the light emitted from the light emitting layer is reflected at a light emitting surface of the transparent electrode , namely at the interface between the transparent electrode and the air constituting the external environment in FIG. 1. For this reason, such organic luminescence device has been associated with a low efficiency of light emission to the exterior. The present invention is to provide an organic luminescence device of a high light-emitting efficiency to the exterior and an organic luminescence device of a satisfactory contrast. A case holding the organic luminescence device in an internal holding space, in which a light emitted from the organic luminescence device, is emitted to the exterior through a light emitting side of the case; wherein anti-reflection means is provided on a light-emitting face on the light-emitting side among faces constituting the internal holding space of the case
4
US6885157B1
04/26/2005
 Eastman Kodak Company Integrated touch screen and OLED flat-panel display It has the problem of multiple external electrical connections by employing a flat-panel display having a substrate that extends beyond the substrate of the resistive touch screen. The present invention has the advantage that it reduces the costs and improves the reliability and performance of a touch screen that is used with an OLED flat-panel display by integrating cable connections on a single substrate and providing touch screen signal processing on the display substrate.
5
US6069443A
05/30/2000
 FED Corporation Passive matrix OLED display The disadvantage of oxygen and moisture penetration into the interior of the organic light emitting device is the potential to form metal oxides at the metal-organic interface. These metal oxide impurities may allow separation of the cathode or anode and the organic in a matrix . This can result in the formation of dark non-emitting spots (i.e., no illumination).Edge shorting between the cathode and anode layers is a current problem affecting most conventional organic light emitting display devices. This edge shorting reduces the illuminating potential of the display devices. The present invention to provide an insulator layer to minimize edge shorts between lines by separating the OLED layer and the electrode elements. It also provides a sealing structure to isolate the OLED layer from moisture and other contaminants.
6
US20110031511A1
02/10/2011
 None ORGANIC LIGHT EMITTING DIODE DISPLAY AND METHOD OF MANUFACTURING THE SAME In the organic light emitting layer, as it is easy to transfer energy in an interface between a light emitting layer and a hole transfer layer, a light emitting efficiency and lifetime of the OLED display are reduced because of an energy loss of triplet inside the OLED display. An interface of the light emitting layer can be improved by forming the inorganic oxide layer between the hole transport layer and the light emitting layer. Further, an energy loss of triplet can be prevented, and the emission efficiency and lifetime can be improved.
7
US20070153051A1
07/05/2007
 Samsung Electronics Co., Ltd. Manufacturing flat panel displays with inkjet printing systems For manufacture of certain flat panel display devices, such as LCDs or OLED displays, various thin film patterns are formed on panel substrates of the devices, typically using photolithography processes. However, as displays become larger, the amount of material that must be deposited on substrates to form the thin film patterns also becomes larger, inturn increases the manufacturing costs of the panels. Inkjet printing systems have been developed for forming the thin film patterns on the substrates by depositing them on the substrates in the form of special inks. These systems deposit the ink on the substrate through an inkjet head. However, the inkjet head includes a plurality of nozzles, and if only one of these nozzles becomes dysfunctional, the number of passes that the inkjet printing head must make increases. As a result, processing time and costs are substantially increased.
8
US6911671B2
06/28/2005
 Eastman Kodak Company Device for depositing patterned layers in OLED displays To achieve color pixelation in OLED imaging panels, fabrication of a multicolor OLED imaging panel using a shadow masking method is used. A multicolor organic electroluminescent ("EL") medium is vapor deposited and patterned by controlling an angular position of a substrate with respect to a deposition vapor stream. The positioning an element in direct contact with a surface of a substrate can invite problems of abrasion, distortion, or partial lifting, this may cause abrasion, distortion, or partial lifting of the first-color pattern. The present invention is that a pattern of vaporized material, such as organic material, can be deposited without the use of shadow mask.Another feature is that a plurality of devices can be used for simultaneously depositing different organic materials. Such organic materials can emit light in different ranges of the spectrum.
9
US7218295B2
05/15/2007
 AU Optronics Corp. Driving method for active matrix OLED display In one display frame, the current received by the OLED is fixed.The driving method used previously accumulates carriers inside the OLED which reduce the life of the OLEDs. Moreover, the voltage across the OLED gradually increases over timewhich inturn increases power. This effects the OLED over time. The present invention uses a driving method to neutralize carrier accumulation in the OLED, thereby reducing the increase in voltage and minimizing the increase in power consumption across both ends of the OLED over time, further increasing the life of the OLED.
10
US7067170B2
06/27/2006
 Eastman Kodak Company Depositing layers in OLED devices using viscous flow To achieve color pixelation in OLED imaging panels, fabrication of a multicolor OLED imaging panel using a shadow masking method is used. A multicolor organic electroluminescent ("EL") medium is vapor deposited and patterned by controlling an angular position of a substrate with respect to a deposition vapor stream. The positioning an element in direct contact with a surface of a substrate can invite problems of abrasion, distortion, or partial lifting, this may cause abrasion, distortion, or partial lifting of the first-color pattern. The present invention is that the method of color pixelating an organic layer includes providing a plurality of vapor sources disposed outside of a deposition chamber for generating vapors of organic materials, and connecting such vapor sources to a manifold disposed in the chamber. By using vapor deposition method, we can eliminate precision shadow masks.

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Article Analysis

S.No.
Title
Authors
Publication date
Journal/Conference
Dolcera summery.
1
 Application of Screen Printing in the Fabricationof Organic Light-Emitting Devices Dino A. Pardo, Ghassan E. Jabbour,* andNasser Peyghambarian 01/27/2000 Optical Sciences Center, University of Arizona.IEEE 27 Jan 2000 This article explains the screen printing technique which deposits organic active layer having a thickness of several tens of nanometers and acting as a hole-transport layer (HTL) in multilayer OLEDs. The resulting devices emitlight at low voltage (<5 V) and have a peak external quantum efficiency of 0.91 %.
2
 Multicolor Organic Light-Emitting DiodesProcessed by Hybrid Inkjet Printing Shun-Chi Chang, Jie Liu, Jayesh Bharathan,Yang Yang,* Jun Onohara and Junji Kido 08/07/1999 Department of Materials Science and EngineeringUniversity of California at Los Angeles. willey 8 Jul 1999 This article presents a multicolor patterning technique to produce controllable patterning of red-green-blue OLEDs with fine pixel displays. The LEDs comprise bilayer structures of red and green dopants with inkjet-printed onto a film of the blue-emitting semiconducting polymer, the latter serving as the hole-transport layer.
3
 Organic light-emitting diode (OLED)technology: materials, devices and displaytechnologies Bernard Geffroy, Philippe le Roy and Christophe Prat 06/02/2006 Laboratoire Cellules et Composants. willey 6 Feb 2006 This article presents an overview of OLED's over LCD's. OLED'S have a thickness, currently less than 2 mm. Having high contrast ratio is also a strong point of OLED and also in fast response time.OLEDs for flat-panel display applications are their self-emitting property, high luminous efficiency, full-colour capability, wide viewing angle, high contrast,low power consumption, low weight, potentially large area colour displays and flexibility.
4
 Organic/polymeric electroluminescent devices processed by hybrid ink-jet printing Yang Yang, Shun-Chi Chang, Jayesh Bharathan and Jie Liu 04/05/1999 Journal of Materials Science: Materials in Electronics Volume 11, Number 2, The HIJP concept is a unique approach for fabricating polymer and organic electronic devices. One is able to apply this technology for the deposition of various functional materials such as charge-injection layers, charge-blocking layers, and multicolor polymer/organic emissive layers. It can be used for the fabrication of logos, indicator lights, multicolor displays and also in bio-medical applications such as biosensors for low cost diagnostics.
5
 White Organic Light-Emitting Devices for Solid-State Lighting B. W. D'Andrade, S. R. Forrest 14/10/2004 Department of Electrical Engineering, Princeton University Willey 14 OCT 2004 This article presents the WOLEDs increasing display applications for use primarily as liquid-crystal display backlights. They have achieved high material purity, low cost, high brightness,color quality and long operational life-times.
6
 White organic light-emitting diodes with fluorescent tube efficiency Sebastian Reineke, Frank Lindner, Gregor Schwartz, Nico Seidler, Karsten Walzer 14/05/2009 Institute of Applied Photophysics. Vol 459 Macmillan Pub This article presents an WOLED havinh high internal quantum efficiencies for the con-version of electrical energy to light have been realized by focussing on reducing energetic and ohmic losses that occur during electron–photon conversion.This can be achieved by improved OLED structure which reaches fluorescent tube efficiency. By combining a care-fully chosen emitter layer with high-refractive-index substrates and using a periodic outcoupling structure
7
 Precision ink jet printing of polymer light emitting displays J. F. Dijksman, P. C. Duineveld, M. J. J. Hack, A. Pierik, J. Rensen, J.-E. Rubingh, I. Schram andM. M. Vernhou 09/11/2006 Philips Research Laboratories RSC Precision ink jet printing of organic polymer light emitting diodes relies strongly on the accuracy of the droplet generation process.Image capturing using one image at a time for image processing delivers sharper images and can be used for optically measuring droplet volumes.
8
 High-efficiency microcavity top-emitting organic light-emittingdiodes using silver anode Huajun Peng, Jiaxin Sun, Xiuling Zhu, Xiaoming Yu, Man Wong, and Hoi-Sing Kwok 17/02/2006 Hong Kong Universityof Science and Technology. AIP High efficient top-emitting OLEDs have been fabricated using highly reflective Ag as the anode. Surfacemodification of the Ag anode by CF4 plasma substantially enhances the hole injection efficiency. The color variation isalmost eliminated in the TOLED. The optimized microcav- ity TOLED has a current efficiency enhancement of 65% and a total outcoupling efficiency enhancement of 35%, as compared with a conventional OLED.
9
 Inverted top-emitting organic light-emitting diodes using transparent conductive NiO electrode Se-W. Park, Jeong-M. Choi, Eugene Kim and Seongil Im 09/01/2005 Institute of Physics and Applied Physics, Applied Surface Science 244 (2005) 439–443 TE-OLED device uses a thermally evaporated and semi-transparent NiO film as a top-electrode. Since the sheet resistance of our NiO was very high and its transmittance was only about 50%, the resulting luminance and injection current of our TE-OLED were much inferior to those of the BE-OLED device.
10
 Self-assembled monolayer-modified Ag anode for top-emitting polymerlight-emitting diodes Lai-Wan Chong, Yuh-Lang Lee,a͒ and Ten-Chin Wenb͒ 07/12/2006 Department of Chemical Engineering, National Cheng Kung University Self-assembled monolayer is a method to modify the Ag anodes for application in T-PLED. The Ag electrode can be utilized as an effective anode to improve the emitting characteristic of a T-PLED. The Ag anode enhances the hole injection, reduce the op-eration voltage, and significantly increase the current inten-sity and luminous efficiency of the device, without decreasing the reflectivity of the Ag anode.

Click here to view the detailed analysis sheet for Top Emission OLED for non patent literature

Top Cited Patents

S. No.
Patent/Publication No.
Publication Date (mm/dd/yyyy)
Assignee/Applicant
Title
Citation Count
1
 US6096496A
8/1/2000
 Frankel; Robert D Supports incorporating vertical cavity emitting lasers and tracking apparatus for use in combinatorial synthesis
130
2
 US6069443A
5/30/2000
 Fed Corporation Passive matrix OLED display
97
3
 US6366017B1
4/2/2002
 Agilent Technologies Organic light emitting diodes with distributed bragg reflector
80
4
 US20020197511A1
12/26/2002
 United Of America As Respresented By The Secretary Of The Air Force High efficiency multi-color electro-phosphorescent OLEDS
51
5
 US6265820B1
7/24/2001
 Emagin Corporation,De Heat removal system for use in organic light emitting diode displays having high brightness
50
6
 US20020195968A1
12/26/2002
 IBM Oled current drive pixel circuit
44
7
 US20020186209A1
12/12/2002
 Eastman Kodak Company Touch screen for use with an OLED display
42
8
 US20030127973A1
7/10/2003
 Universal Display Corporation OLEDs having increased external electroluminescence quantum efficiencies
41
9
 US6844673B1
1/18/2005
 Alien Technology Corporation Split-fabrication for light emitting display structures
38
10
 US20040174116A1
9/9/2004
 Universal Display Corporation Transparent electrodes
36
11
 US20050194896A1
9/8/2005
 Hitachi Displays Ltd. Light emitting element and display device and illumination device using the light emitting element
35
12
 US20020074935A1
6/20/2002
 Universal Display Corporation Highly stable and efficient OLEDs with a phosphorescent-doped mixed layer architecture
35
13
 US20040217702A1
11/4/2004
 Corning Incorporated Light extraction designs for organic light emitting diodes
33
14
 US20020030647A1
3/14/2002
 Universal Display Corporation Uniform active matrix oled displays
32
15
 US20050248270A1
11/10/2005
 Eastman Kodak Company Encapsulating OLED devices
31
16
 US20040113875A1
6/17/2004
 Eastman Kodak Company Color oled display with improved power efficiency
29
17
 US20030230972A1
12/18/2003
 Eastman Kodak Company Oled display having color filters for improving contrast
28
18
 US20050040756A1
2/24/2005
 Eastman Kodak Company OLED device having microcavity gamut subpixels and a within gamut subpixel
27
19
 US6670772B1
12/30/2003
 Eastman Kodak Company Organic light emitting diode display with surface plasmon outcoupling
26
20
 US20040061136A1
4/1/2004
 Eastman Kodak Company Organic light-emitting device having enhanced light extraction efficiency
26

Top Cited Articles

S. No.
Title
Publication Date
Journal/Conference
Citations Count
1
 Electroluminescence from single monolayers of nanocrystals in molecular organic devices
Oct 2002
 Nature, Internatinal journal of science.
736
2
 Spin-dependent exciton formation in π-conjugated compounds
Aug 2001
 Nature, Internatinal journal of science.
220
3
 Highly Efficient Organic Devices Based on Electrically Doped Transport Layers
Mar 2007
 American Chemical Society Pub.
211
4
 Phosphorescent top-emitting organic light-emitting devices with improved light outcoupling
Nov 2002
 Applied Physics Letters / Volume 82
111
5
 Thin-film permeation-barrier technology for flexible organic light-emitting devices
Jan 2004
 IEEE Photonics Society
104
6
 Design of flat-panel displays based on organic light-emitting devices
Feb 1998
IEEE Photonics Society
100
7
 A new a-Si:H thin-film transistor pixel circuit for active-matrix organic light-emitting diodes
Aug 2003
 IEEE Electron Devices Society
86
8
 The road to high efficiency organic light emitting devices
Sep 2003
 ScienceDirect
87
9
 Amorphous silicon thin film transistor circuit integration for organic LED displays on glass and plastic
Sep 2004
 IEEE Photonics Society
73
10
 Transparent-cathode for top-emission organic light-emitting diodes
Feb 2003
 Applied Physics Letters
72

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Products

S. No.
Company
Product
Specifications
1
Sony
Oled 2.png
BVME250
Digital Inputs Specifications Detail:
HDMI HDMI (x1) (HDCP correspondence, Deep Color correspondence)
SDI (SMPTE 259M) BNC (x2)
Display Specifications Detail:
Image Aspect Ratio 16:09
Resolution 1920 x 1080 pixels (Full HD)
Screen Size 24 5/8 inches (623.4 mm)
Viewing Angle 89°/89°/89°/89°
General Specifications Specifications Detail:
Dimensions (W x H x D) 22 3/4 x 16 3/4 x 5 7/8 inches
Weight 28 lb 11 oz
Power Requirements Specifications Detail:
Power Consumption Approx. 145 W
Power Requirements AC 100 V to 240 V, 1.6 A to 0.8 A, 50/60 Hz
2
Sony
 Oled 3.png
BVM-E170
 Digital Inputs Specifications Detail:
HDMI HDMI (x1) (HDCP correspondence, deep colour correspondence)
SDI BNC (x2)
Display Specifications Detail:
Image Aspect Ratio 16:09
Resolution 1920 x 1080 pixels (Full HD)
Screen Size 365.8 x 205.7 mm (14 1/2 x 8 1/8 inches)
Viewing Angle 89°/89°/89°/89° (typical) (up/down/left/right contrast >10:1)
General Specifications Specifications Detail:
Dimensions (W x H x D) 436.0 x 282.4 (266.4)* x 214.7 mm (17 1/4 x 11 1/4 (10 1/2)* x 8 1/2 inches) * Height without legs
Weight 8.5 kg (18 lb 11 oz)
Power Requirements Specifications Detail:
Power Consumption Approx. 65 W normally with input from a standard HDMI input. Approx. 115 W at maximum load, with four option slots in use and maximum luminance compensation for any deterioration due to aging.
Power Requirements AC 100 V to 240 V, 1.4 A to 0.7 A, 50/60 Hz DC 24 V to 28 V, 4.7 A to 4.0 A
3
Sony
 Oled 1.png
PVM-740
Digital Inputs Specifications Detail:
HDMI Yes
HDSDI (SMPTE 292M) 3G/SDI/HDSDI
SDI (SMPTE 259M) Included
Display Specifications Detail:
Back Light Technology OLED
Native Aspect Ratio 16:09
Resolution 960 x 540
Screen Size Approx 7.4 inches
Viewing Angle 85°/85°/85°/85° (typical) (up/down/left/right contrast>10:1)
General Specifications Specifications Detail:
Dimensions (W x H x D) 8 7/8 x 7 1/4 x 6 3/8 inches Approx. 222.4 x 183.5 x 161.8 mm
On-Screen Display Yes
Rack Mount MB531
Weight Approx. 5 lb 12 oz Approx. 2.6 kg
Power Requirements Specifications Detail:
Power Consumption Max. approx. 27W
Power Requirements AC 100 to 240 V 50/60 Hz 0.5A to 0.3A DC 12 V 1.9 A Rechargeable Battery Pack

Market Research

Major Players

Major types of player
USA
EU
Japan
Korea
Taiwan
China
Original IPR for devices and for manufacture process + material supply / verification
UDC; Kodak; Add-Vision; Magin; Plextronics; Organic Lighting Technologies; GE;3M Innovation CDT (Sumitomo Chemical) (UK); Novaled (G); Fraunhofer IPMS (G); OLED-T (UK); OTB (ND); MicroEmissive Displays (UK) Seiko-Epson; Matsushita; Sony; Sumitomo Chemical; Sharp; TM Display; Konica –Minolta; Sanyo; Toppoly; Lumiotec; Canon; Toshiba Samsung; LG Phillips LCD; Neo View; Doosan DND AU Optoelectronics (AUO); Univision; Toppoly; Tetrahedron; Chi Mei Optoelectronics
Bulk materials and glass suppliers
PPG; 3M; Dow Corning Merck Materials (G); BASF (G); CDT (UK); Degussa/ Evonik (G); HC Starck (G); Sensient Imaging Technologies (G); Goodfellow Metals (UK); Novaled (G) Sumitomo Chemical; Mitsubishi Chemical Syndychem (Shenyang Syndy Chemistry Institute)
Components – driver ccts., packaging etc
Corning; Rockwell Collins ST Microelectronics (It, Fr); Infineon (G) Maekawa; Matsushita; Toppoly Dae Joo Electrncs AUO; Richtek Technologies; Lightsonic; Univision; Wintek Innocom Technologies Shenzen; RIT Display
OEM OLED FPD screen manufacturer & resellers
eMagin; US Micro Products Densitron Technologies (UK); MicroEmissive Displays (MED) (UK); Pacer International Distributors (UK reseller) Seiko-Epson; Sharp; Sumitomo Chemical; Lumiotec; TMDisplay; Sanyo Samsung SDI; Orion OLED; NeoView KOLON; Hyundai LCD AUO; Chi Mei EL (CMEL); Univision Technology; Evervision Electronics; RiTDisplay; TPO Display Visionix; Smartdisplays; Universal Display Technologoes (Jilin); Varitronix (HK); Blaze Display Technologies
Branded application device or/and FPD screen manufacturer with retail device sales
OSD Nokia; Sony-Ericsson Sony; Matsushita; Hitachi; Toshiba; Imase Samsung; LG Philips
OLED lighting branded suppliers and R&D
GE Thorn EMI (UK); OSRAM (G); Siemens (G) Sumitomo Chemica

source: Major players

SWOT analysis

Strengths
Weaknesses
• Capability for innovation
• Production of base materials for OLED manufacture
• Process equipment manufacture is easy. 		• Lack of industrial productive capacity or eco-system to support low-cost volume production
• Capability to bring innovations to market – i.e. probability of export market success
• Lack of branded consumer goods suppliers apart from mobile handsets – e.g. Nokia
Opportunities
Threats
• Possible renaissance in manufacturing at low-cost
• Use of IPR – with mitigations through agreements
• Expansion in base materials supply and process equipment manufacture for low temperatures 		• Older technologies – TFT-LCDs which improve technically – become cheaper, flexible, lower power demands and better colour/contrast, scale up larger, etc, make existing (LCD) players far stronger
• Strong competitive position and behaviour of current major players globally and market make market entry difficult or increasingly impossible

Market Forecast

OLED Lighting Market Forecast

  • OLED lighting will pick up in 2011, and reach $6.3B by 2018.
  • The OLED lighting market will reach $1.5B by 2015, and $6.3B by 2018.
  • Large investments have been made in OLED lighting in the EU, US, Japan and Korea.
  • There are about 20 OLED lighting organizations worldwide. Europe is currently the leading participant in OLED lighting in terms of projects numbers, government funding, and participating companies.
  • Over 100 companies and universities are currently working on OLED lighting.
OLED Lighting Market Forecast

OLED TV Market Forecast

  • OLED TV sets will account for around half of all revenue for OLED panels in 2012, growing rapidly from just $150 million in 2011 to $1.5 billion in 2013.
  • iSuppli’s similarly forecasts the global OLED TV market will reach 2.8 million units by 2013, managing a compound annual growth rate (CAGR) of 212.3% from just 3,000 units in 2007.
  • In terms of global revenue, OLED TV will hit $1.4 billion by 2013, increasing at a CAGR of 206.8% from $2 million in 2007.
OLED TV Market Forecast

OLED Dispaly Market Forecast

  • OLED display market will grow to $5.5 billion by 2015, from $0.6 billion in 2008, with a CAGR of 37%. Currently, this growth is being driven by the adoption of active matrix OLED (AMOLED) displays for the primary display in mobile phones and portable media players.
OLED Display Market Forecast

Recent Licensing Activities in OLED Segment

Licensor Licensee Date Details
Global OLED Technology LLC OLEDWorks 6th Dec 2011 Under the terms of the royalty-bearing license, OLEDWorks is granted the right to use certain GOT patents in connection with OLEDWorks’ commercialization of specified OLED lighting-related products.
Universal Display Moser Baer 8th Feb 2011 Moser Baer agreed to license Universal’s OLED technology and purchase UniversalPHOLED (phosphorescent OLED) materials for white OLED panel manufacturing. The companies have agreed to work together for five years in the development of Moser Baer’s US-based OLED panel manufacturing project.
Universal Display Pioneer Corp 29th Sep 2011 Pioneer is supposed to use Universal Display’s highly efficient, high-performance UniversalPHOLED® technology and materials for the manufacture and sale of OLED lighting products
DuPont Samsung 3rd Nov 2011 Samsung needed new technology for its larger models for televisions and hoped to benefit from DuPont’s recent innovations.

Landscape Analysis Of Top-Emmission OLED

Competitor Landscape

Top Assignee

Top Assignee

Filing trends over the publication years

IP activity based on publication years

Filing trends over the priority years

IP activity based on priority years

Geographical Distribution based on family members

  • The geographical distribution is based on 10 sample patent numbers along with all their family members.
Geographical Distribution based on Family members of OLED


Key Inventor Mapping

S.No
 Inventor 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Total Result
1
 Cok, Ronald
1
3
22
18
17
14
15
4
2
96
2
 Park, Jin Woo
18
2
20
3
 Choi, Beohm Rock
1
6
7
2
16
4
 Kim, Nam Deog
7
6
3
16
5
 Tyan, Yuan Sheng
2
7
3
1
1
1
15
6
 Winters, Dustin
2
5
5
2
1
15
7
 Choi, Dong Soo
13
1
14
8
 Choi, Joon Hoo
2
3
4
5
14
9
 Kwak, Won Kyu
1
1
9
1
1
1
14
10
 Miller, Michael
4
4
2
1
1
1
1
14
11
 Park, Jae Yong
2
8
4
14
12
 Shore, Joel
2
2
5
3
1
1
14
13
 Arnold, Andrew
4
5
1
1
1
1
13
14
 Boroson, Michael
1
4
3
1
4
13
15
 Goh, Joon Chul
1
4
5
3
13
16
 Tanaka, Masahiro
1
1
1
5
4
1
13
17
 Choong, Vi En
5
5
2
12
18
 Ghosh, Amalkumar
2
1
1
3
5
12
19
 Kim, Eun Ah
1
2
9
12
20
 Kobayashi Hidekazu
1
2
2
5
1
1
12
21
 Total Result
2
1
1
6
45
67
72
90
47
18
15
362

Most Cited Patents

S.No
Publication Number
Assignee/Applicant
Title
Publication Date
Count of Citing Patents
1
 US6069443A Fed Corporation Passive matrix OLED display
30/05/2000
97
2
 US6366017B1 Agilent Technologies Organic light emitting diodes with distributed bragg reflector
02/04/2002
80
3
 US20020197511A1 United Of America As Respresented By The Secretary Of The Air Force High efficiency multi-color electro-phosphorescent OLEDS
26/12/2002
51
4
 US6265820B1 Emagin Corporation,De Heat removal system for use in organic light emitting diode displays having high brightness
24/07/2001
50
5
 US20020195968A1 IBM Oled current drive pixel circuit
26/12/2002
44
6
 US20020186209A1 Eastman Kodak Company Touch screen for use with an OLED display
12/12/2002
42
7
 US20030127973A1 Universal Display Corporation OLEDs having increased external electroluminescence quantum efficiencies
10/07/2003
41
8
 US6844673B1 Alien Technology Corporation Split-fabrication for light emitting display structures
18/01/2005
38
9
 US20040174116A1 Universal Display Corporation Transparent electrodes
09/09/2004
36
10
 US20050194896A1 Hitachi Displays Ltd. Light emitting element and display device and illumination device using the light emitting element
08/09/2005
35
11
 US20020074935A1 Universal Display Corporation Highly stable and efficient OLEDs with a phosphorescent-doped mixed layer architecture
20/06/2002
35
12
 US20040217702A1 Corning Incorporated Light extraction designs for organic light emitting diodes
04/11/2004
33
13
 US20020030647A1 Universal Display Corporation Uniform active matrix oled displays
14/03/2002
32
14
 US20050248270A1 Eastman Kodak Company Encapsulating OLED devices
10/11/2005
31
15
 US20040113875A1 Eastman Kodak Company Color oled display with improved power efficiency
17/06/2004
29
16
 US20030230972A1 Eastman Kodak Company Oled display having color filters for improving contrast
18/12/2003
28
17
 US20050040756A1 Eastman Kodak Company OLED device having microcavity gamut subpixels and a within gamut subpixel
24/02/2005
27
18
 US6670772B1 Eastman Kodak Company Organic light emitting diode display with surface plasmon outcoupling
30/12/2003
26
19
 US20040061136A1 Eastman Kodak Company Organic light-emitting device having enhanced light extraction efficiency
01/04/2004
26

Most Cited Patents Mapping

Most Cited Patents

Technology Mapping

  • In OLED devices not all internally generated light is coupled out of the device (only 20%-50%), which reduces the device efficiency and lifetime.
  • Modification in structures are applied to improve outcouple efficiency in order to enhance the efficiency and lifetime of top emission OLEDs.
  • Below is a snapshot of how various organizations are using different design structures, using the same principle of internal reflection, to achieve higher out-coupling efficiencies.

Comparison of out coupling of waveguiding light in top-emission polyLED stack

Slide-oled.jpg
  • Some light is reflected out of the OLED at stray angles in typical cases. By using a barrier material (form of microparticles) in the cathode layer, this light at stray angles hits the barrier material, and some of it is reflected back and guided out at the right angles, reducing light loss.
Slide-oled1.jpg
  • Microparticles are incorporated in the substrate, which prevents light loss by reflecting light emitted at stray angles.
Slide-oled2.jpg
  • A highly reflective anode is provided made of Aluminium or Silver, with a mirror like finish, to reflect light.
Slide-oled3.jpg
  • A shielding layer is provided below the anode, across its entire surface, thus increasing the surface area from which light can be reflected outside.
Slide-oled4.jpg
  • The reflective layer, anode, is made of a highly reflective surface like Aluminium alloy or silver.

Conclusion

The innovation is towards:

  • Incorporating micro-particles structure over the substrate that provide a reflective surface.
  • Highly reflective materials using metals like Molybdenum etc.


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