Unlock instant, AI-driven research and patent intelligence for your innovation.

Quantum dot color filter ink compositions and devices utilizing same

A technology of quantum dots and compositions, applied in inks, instruments, applications, etc., can solve problems such as EQE reduction, spectral red shift, and damage to display viewing angles

Pending Publication Date: 2021-04-30
KATEEVA
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the thickness may impair the viewing angle of the display by causing parallax problems, and at very high QD concentrations, reabsorption of emitted photons may occur, resulting in reduced EQE due to significant overlap between QD absorption and emission.
In addition, multiple reabsorption events may redshift the spectrum, resulting in color distortion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Quantum dot color filter ink compositions and devices utilizing same
  • Quantum dot color filter ink compositions and devices utilizing same
  • Quantum dot color filter ink compositions and devices utilizing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Ink compositions containing perylene dyes and films formed therefrom.

[0059] To illustrate the improvement that can be achieved by including a light absorbing material in the red subpixel, two QDCF ink compositions were formulated: Ink A and Ink B. Ink A as a reference is an ultraviolet (UV) curable ink containing red light emitting quantum dots. The composition of Ink B is similar to that of Ink A, but contains 1% by weight of perylene derivative dye Lumogen F Yellow083 as a blue light absorbing material.

[0060] Quantum dots: Red luminescent quantum dots are InP / ZnS quantum dots functionalized with hydrophilic ligands from Nanosys.

[0061] Luminescent material: Lumogen F Yellow 083 was purchased from BASF. Lumogen F Yellow 083 has absorption in the blue wavelength region of the visible spectrum, and the maximum absorption in dichloromethane is about 476nm. The dye has multiple emission peaks with a peak maximum at 496 nm in dichloromethane.

[0062]...

Embodiment 2

[0076] Example 2: Ink compositions containing coumarin dyes and films formed therefrom.

[0077] To illustrate the improvements that can be achieved by including light-absorbing materials in the green subpixel, four QDCF ink compositions were formulated. Ink A2, Ink B2, Ink C2, and Ink D2. Ink A2 as a reference is a UV curable ink containing green luminescent quantum dots. Inks B2, C2, and D2 had a similar composition to ink A, but contained 0.15% to 0.24% by weight of coumarin as a blue light absorbing material.

[0078] Quantum dots: Green luminescent quantum dots were purchased from Nanosys.

[0079] Blue light-absorbing materials: Coumarin 334, Coumarin 314, and Coumarin 6 were purchased from Sigma Aldrich and used in B2, C2, and D2 ink compositions, respectively. Coumarin absorbs in the blue wavelength region of the visible spectrum, with an absorption maximum in the wavelength range from 430 nm to 460 nm.

[0080] Table 2 shows the formulations of ink compositions A2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
surface tensionaaaaaaaaaa
surface tensionaaaaaaaaaa
Login to View More

Abstract

Liquid ink compositions containing quantum dots for optoelectronic display applications are provided. Also provided are solid films formed by drying the ink compositions, optical elements incorporating the solid films, display devices incorporating the optical elements, and methods of forming the solid films, optical elements, and the devices. Liquid ink compositions and solid films made by drying the liquid ink compositions include one or more blue light-absorbing materials in combination with red light-emitting QDs or green light-emitting QDs.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 737,790, filed September 27, 2018, the entire contents of which are hereby incorporated by reference. Background technique [0003] Display technology is constantly evolving to improve the end user experience. One aspect of improving the end-user experience is aimed at extending the color gamut of liquid crystal display (LCD) devices and increasing the efficiency of these devices. Therefore, quantum dot (QD) technology has been explored to expand the color gamut and improve the efficiency of these devices. [0004] One way to improve the efficiency, color gamut and viewing angle of LCD panels is to replace traditional color filters with quantum dot color filters (QDCF). In this configuration, the quantum dots "filter" incident light of a first wavelength or range of wavelengths, such as blu ray. [0005] In a typical red-green-blue (RGB) p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A61K31/722A61K33/30A61K47/69
CPCC09K11/06C09K11/565C09K11/70C09D11/101C09D11/328C09D11/50C09D11/36G02F1/133617G02F2203/055G02F2202/36H10K59/38H10K2102/331C09D11/037G02F1/133516G02F1/133603G02F1/133504C09K2211/1011G02F2201/52G02F2202/108G02F2202/106G02F2202/107
Inventor 康诺F·马迪根西达尔塔 哈里克里希纳·莫汉弗洛瑞恩·普舍尼茨卡特雷沙 A·拉莫斯英娜·古列维奇
Owner KATEEVA