Dual-Plate OLED Display (DOD) Embedded With White OLED

Shin

2016

Jpn. J. Appl. Phys.

A new structure for white organic light-emitting diode (OLED) displays with a patterned quantum dot (QD) film and a long pass filter (LPF) was proposed and evaluated to realize both a high color gamut and high optical efficiency. Since optical efficiency is a critical parameter in white OLED displays with a high color gamut, a red or green QD film as a color-converting component and an LPF as a light-recycling component are introduced to be adjusted via the characteristics of a color filter (CF). Compared with a conventional white OLED without both a QD film and the LPF, it was confirmed experimentally that the optical powers of red and green light in a new white OLED display were increased by 54.1 and 24.7% using a 30 wt % red QD film and a 20 wt % green QD film with the LPF, respectively. In addition, the white OLED with both a QD film and the LPF resulted in an increase in the color gamut from 98 to 107% (NTSC ratio) due to the narrow emission linewidth of the QDs.

Section: Experiments On Core Componentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical efficiency enhancement in white organic light-emitting diode display with high color gamut using patterned quantum dot film and long pass filter

Shin

2016

Jpn. J. Appl. Phys.

Symp Digest of Tech Papers

“…The PDL layer inside panel directly contacts with the OLED device, and the SPC layer connects with the PDL layer, both these two layers are prepared by organic gel. So we could know that the organic layers inside the panel would release some outgassing during the Xenon light exposure test [4] , which would influence the pixel shrinkage located at the pixel peripheral area. The organic layers were composed of polyimide materials.…”

Section: Introductionmentioning

confidence: 99%

P‐15.4: Failure Analysis of OLED Module Display Edge Bluish and White Spot at Outdoor Weathering Test

Zhang,

Zhou,

Lei

et al. 2024

With the continuing prosperity of OLED display markets, the reliability demand of OLED display turned to be increasingly diverse. The outdoor weathering test is a type of light exposure test to measure the radiation durability, and also is a threat to the polymeric materials [1][2] . During the test, as the testing duration increased, the OLED display luminance decreased, meanwhile the edge bluish and white spot(fig.1) failure occurred. In this paper, we disclose the cause and the probable mechanism of the OLED display failure during Outdoor weathering test.

“…Flat panel display (FPD) based on organic light emitting diodes (OLEDs) has attracted much attention in both scientific and industrial communities as a strong candidate to replace liquid crystal displays (LCDs) due to its advantages of self-emitting structure, thin thickness, wide viewing angle, high contrast ratio, and short response time 1 2 3 4 5 . However, individual red, green, and blue (RGB) pixel based OLEDs have technical limitations in realizing large-sized displays with high resolution, because the fine metal mask (FMM) required for patterning an RGB OLED still has some serious technical barriers such as inaccurate precision alignment and contact with glass substrate 6 7 8 9 . To overcome these barriers, a method using white OLEDs with color filter (CF) has emerged as an alternative OLED display structure.…”

mentioning

confidence: 99%

High efficient OLED displays prepared with the air-gapped bridges on quantum dot patterns for optical recycling

Shin

et al. 2017

Sci Rep

An optically efficient structure was proposed and fabricated to realize high brightness organic light emitting diode (OLED) displays based on a white OLED prepared with the air-gapped bridges on the quantum dot (QD) patterns. Compared with a conventional white OLED display, in our experiments, the optical intensity of the proposed OLED display shows the enhancement of 58.2% in the red color and 16.8% in the green color after applying the air-gapped bridge structure on QD patterns of 20 wt% concentration. This enhancement comes from the two facts that the QD patterns downconvert unnecessary blue or blue/green light to the required green or red light and the air-gapped bridges increase the color conversion efficiency of QDs by optical recycling using total internal reflection (TIR) at the interface. In addition, the color gamut of the proposed OLED display increases from 65.5 to 75.9% (NTSC x, y ratio) due to the narrow emission spectra of QDs.