Quantum dot colored film structure of wedge-shaped substrate

A wedge-shaped substrate, quantum dot technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of insufficient color conversion rate, reduced color purity, uneven distribution of quantum dots, etc., to improve light utilization and reduce blue light strings. Color, enhance the effect of light purity

Active Publication Date: 2018-11-30
FUZHOU UNIV
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Problems solved by technology

[0004] However, due to the uneven distribution of quantum dots or insufficient concentration of quantum dots during the configuration process, the color conversion rate is insufficient during the process of blue light exciting quantum dots to emit light, resulting in a decrease in color purity (blue light is included in the emitted red light and green light) and light The problem of low utilization

Method used

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  • Quantum dot colored film structure of wedge-shaped substrate
  • Quantum dot colored film structure of wedge-shaped substrate
  • Quantum dot colored film structure of wedge-shaped substrate

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Embodiment

[0045]In this example, after the light is incident on the wedge-shaped microstructure 101 on the lower surface of the substrate 2, the bottom angle of the lower wedge-shaped microstructure 25 is set as α, when the light enters the wedge-shaped substrate with the refractive index n2 from the refractive index n1 vertically upward 2, the incident angle is also α, the refraction angle is β, and the angle with the upper wedge-shaped microstructure 24 on the upper surface of the substrate 2 is θ. From this, we can get the relationship formula between angle a and refractive index n1 and n2:

[0046]

[0047] Using PMMA as the wedge-shaped substrate 2 and the outside is air, then n1=1.49, n2=1. Bring n1 and n2 into the formula, and take α as 20 degrees. When no quantum dot color film is made on the upper surface of the substrate, 50% of the light can be fully emitted on the upper surface of the substrate 2 . When the α angle is adjusted to 20 degrees, 65% of the light is totally ...

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Abstract

The invention provides a quantum dot colored film structure of a wedge-shaped substrate. Blue light of a backlight module can be used efficiently. A red sub-pixel part and a green sub-pixel part of the colored film structure are provided with transparent substrates, and the transparent substrates are in contact with quantum dots through transparent wedge-shaped microstructures; the blue light of the backlight module is totally reflected in the wedge-shaped microstructures when passing through a lower polarizer, a liquid crystal and an upper polarizer and then entering the wedge-shaped microstructures and used for exciting the quantum dots at contact parts between the wedge-shaped microstructures and the quantum dots. The quantum dot colored film structure can effectively improve the purityof emitted light, increase the light utilization rate and reduce the use number of the quantum dots.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a quantum dot color film structure of a wedge-shaped substrate. Background technique [0002] In recent years, liquid crystal display technology has been widely used in various fields of society. With the continuous improvement of people's living standards, the requirements for the display quality of liquid crystal displays are also gradually increasing, and there are high requirements in terms of color gamut and brightness. The emergence of quantum dots as a new type of material can better solve this problem. Quantum dots have the advantages of tunable luminous wavelength, narrow luminous line width, high luminous efficiency, and good optical, thermal and chemical stability. After solution processing, spin coating or Photoluminescence after inkjet printing is a new generation of luminescent materials used in solid-state lighting and full-color flat panel displays...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02F1/1335
CPCG02F1/133553G02F1/133617
Inventor 徐胜郭太良陈恩果叶芸缪煌辉黄佳敏雷霄霄谢洪兴
Owner FUZHOU UNIV
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