Novel technologies for commercialized 55-inch WRGB OLED TV

Tak, Yoon‐Heung; Han, Chang-Wook; Kim, Hyo-Seok; Kim, Bong-Chul; Kim, Jong-Woo; Kim, Tae‐Seung; Kim, Bum-Sik; Oh, Chang‐Ho; Cha, Su-Yeol; Ahn, Byung‐Chul

doi:10.1117/12.2026859

Cited by 13 publications

(7 citation statements)

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“…Depends on this technique can cover large size of panel to reduce sagging minimized. However, those methods till have a relatively low yield [2].…”

Section: Introductionmentioning

confidence: 99%

“…This method has some advantages of high yield in mass production for large-sized display compared with the individual red, green and blue (RGB) OLED display because a white OLED does not require a fine metal mask for patterning [3]. However, white OLED with CF has relatively low efficiency since the light in unnecessary color range from the white OLED is cut by the CF, resulting in a loss of optical brightness [4]. Thus we must improve the optical efficiency in white OLED with CF display.…”

Section: Introductionmentioning

confidence: 99%

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P-207L:Late-News Poster: Enhancement of Optical Efficiency in White OLED Display by Applying an Air-Gap Structure on the Patterned Quantum Dot Film

Kim

et al. 2016

SID Symposium Digest of Technical Papers

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New white Organic Light Emitting Diode (OLED) display was proposed and designed with an air-gap structure on the patterned Quantum Dot (QD) film to improve optical efficiency through recycling the unnecessary light. In experimental data compared with conventional OLED display, optical efficiency of red and green light in white OLED display was increased by 68.4% and 36.2% applying an air-gap structure on the patterned QD film. Those improved results adopt property about medium's reflectivity of difference. In simple terms, emitted light from white OLED transmit Color Filter (CF) and in case of over critical angle of light are reflected at an air-gap. And then, Reflected light are absorbed at the patterned QD and emitted subsequently again. Under this circulation of the rays of light could be referred to recycling system.

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“…Depends on this technique can cover large size of panel to reduce sagging minimized. However, those methods till have a relatively low yield [2].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

P-207L:Late-News Poster: Enhancement of Optical Efficiency in White OLED Display by Applying an Air-Gap Structure on the Patterned Quantum Dot Film

Kim

et al. 2016

SID Symposium Digest of Technical Papers

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“…Organic light emitting diode (OLED) displays have been a strong candidate as a next-generation display and a lighting source for a recent decade owing to thin and light weight panel with vivid images of wide viewing angle and high contrast ratio representation [1,2]. And at last, 55inch WRGB OLED TV has been developed and launched recently [1].…”

Section: Introductionmentioning

confidence: 99%

“…Large-sized OLED displays require novel backplane technologies to realize mass production, that's why we choose oxide TFT backplane technology which can be applicable to Gen. 8 glass and can use amorphous silicon (a-Si) TFT infrastructures [1,2].…”

Section: Introductionmentioning

confidence: 99%

50.3: A Novel Power Saving Technology for OLED TV with External TFT Compensation

Kim¹,

Kim²,

Yu³

et al. 2014

Symp Digest of Tech Papers

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This paper presents the latest technology called 'Adaptive SV DD ' which helps to reduce power consumption and also to increase gray scale for OLED displays. This method is equipped with 'external compensation technology' that is suitable for large sized OLED displays in that it substantially reduces the number of TFTs and capacitors. This 'external compensation technology' requires arithmetic operation, which needs to be driven externally, of V TH and mobility of TFTs. Since V TH has a tendency to move toward positive direction and to have much wider variation by TFT degradation, input voltage range has to be considered with a marginal V TH which is expected to increase. And this marginal voltage results to increase supplying voltage of a source driver IC and to reduce gray scale.The presented technology details in overhead optimization corresponded to V TH margin so that the power consumption is reduced and the image quality is increased. This technology was applied to 55inch OLED TV. To make it short, it could decrease 25% of voltage, 30.6% of the power consumption. Furthermore, it could increase gray scale to 25.8%.

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“…Organic light-emitting diodes (OLEDs), the most advanced of these technologies, already form the basis for a new generation of commercially viable smart phone displays and large-screen televisions1 and are being developed for flexible lighting and display panels, which cannot be realized with inorganic LED or LCD technology23. Although progress has been rapid regarding many facets of the performance, processing, and development of organic electronics, difficulty obtaining reproducible operational lifetimes for organic devices fabricated with the same structure and materials, even when made in the same laboratory, is a problem that continues to mystify researchers.…”

mentioning

confidence: 99%

Influence of vacuum chamber impurities on the lifetime of organic light-emitting diodes

Fujimoto¹,

Suekane

Imanishi

et al. 2016

Sci Rep

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We evaluated the influence of impurities in the vacuum chamber used for the fabrication of organic light-emitting diodes on the lifetime of the fabricated devices and found a correlation between lifetime and the device fabrication time. The contact angle of the ITO substrates stored the chamber under vacuum were used to evaluate chamber cleanliness. Liquid chromatography-mass spectrometry was performed on Si wafers stored in the vacuum chamber before device fabrication to examine the impurities in the chamber. Surprisingly, despite the chamber and evaporation sources being at room temperature, a variety of materials were detected, including previously deposited materials and plasticizers from the vacuum chamber components. We show that the impurities, and not differences in water content, in the chamber were the source of lifetime variations even when the duration of exposure to impurities only varied before and after deposition of the emitter layer. These results suggest that the impurities floating in the vacuum chamber significantly impact lifetime values and reproducibility.

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Novel technologies for commercialized 55-inch WRGB OLED TV

Cited by 13 publications

References 0 publications

P-207L:Late-News Poster: Enhancement of Optical Efficiency in White OLED Display by Applying an Air-Gap Structure on the Patterned Quantum Dot Film

P-207L:Late-News Poster: Enhancement of Optical Efficiency in White OLED Display by Applying an Air-Gap Structure on the Patterned Quantum Dot Film

50.3: A Novel Power Saving Technology for OLED TV with External TFT Compensation

Influence of vacuum chamber impurities on the lifetime of organic light-emitting diodes

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