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Quantum dot light-emitting device, backlight module and liquid crystal display device

A quantum dot light-emitting and light-emitting device technology, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of light energy loss and reduce the light extraction efficiency of the quantum dot layer, so as to reduce the secondary conversion and improve the conversion efficiency of absorption and excitation light , the effect of reducing conversions

Inactive Publication Date: 2016-08-31
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] continue as Figure 1c shows that the wavelength range of the absorption spectrum is: red quantum dot material > green quantum dot material > blue quantum dot material, so that the absorption spectrum of the red quantum dot material is the widest, and the green quantum dot absorbs blue light for excitation After the green light is generated, a part of the green light continues to excite the red quantum dots for secondary absorption conversion. Each conversion process will bring a certain amount of light energy loss, which will reduce the final light extraction efficiency of the quantum dot layer.

Method used

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  • Quantum dot light-emitting device, backlight module and liquid crystal display device
  • Quantum dot light-emitting device, backlight module and liquid crystal display device
  • Quantum dot light-emitting device, backlight module and liquid crystal display device

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Experimental program
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Embodiment 1

[0035] figure 2 A schematic structural diagram of a quantum dot light-emitting device is provided for Embodiment 1 of the present invention, as shown in figure 2 As shown, the quantum dot light-emitting device 300 includes: a light-emitting device 301, a second quantum dot encapsulation layer 302 and a third quantum dot encapsulation layer 303, the light-emitting device 301 generates excitation light with a first wavelength, and the second quantum dot encapsulation layer 302 uses The third quantum dot encapsulation layer 303 is used to absorb the excitation light of the first wavelength to generate the second wavelength conversion light. The second quantum dot encapsulation layer 302 is located in the light emitting device 301 Between the third quantum dot encapsulation layer 303, wherein the third wavelength is smaller than the second wavelength and larger than the first wavelength.

[0036] Exemplarily, the light emitting device 301 may be a blue light emitting diode (LED...

Embodiment 2

[0046] Figure 4 A schematic structural diagram of a package is provided for the quantum dot light-emitting device in the first embodiment of the second embodiment of the present invention, as shown in image 3 As shown, a quantum dot light-emitting device package 50 can be used as a light source for a backlight in a backlight module, and can be used alone as a lighting source, including:

[0047] The circuit board 51 is arranged to provide a power circuit for the quantum dot light emitting device package 50 .

[0048] The light emitting device 52 is arranged on the circuit board 51 and generates excitation light with a first wavelength. Wherein, the light emitting device 52 may be a light emitting diode (LED) chip, such as a GaN-based LED chip that emits blue light.

[0049] The second quantum dot encapsulation layer 53 is used for absorbing the exciting light of the first wavelength to generate the second wavelength converted light.

[0050] The third quantum dot encapsul...

Embodiment 3

[0060] Figure 5 A schematic structural diagram of a quantum dot light-emitting device package is provided in Embodiment 3 of the present invention, as shown in Figure 5 As shown, a quantum dot light-emitting device package 60 can be used as a light source, used as a backlight source in a backlight module, and can be used alone as a lighting source.

[0061] Quantum dot light emitting device package 60 includes:

[0062] The packaging base 62 is formed in a groove shape.

[0063] The light emitting device 61 is arranged on the bottom of the groove of the packaging substrate 62 to generate excitation light of the first wavelength. Wherein, the light emitting device 61 may be a light emitting diode (LED) chip, such as a GaN-based LED chip that emits blue light.

[0064] The second quantum dot encapsulation layer 63 is used for absorbing the excitation light of the first wavelength to generate the second wavelength converted light.

[0065] The third quantum dot encapsulatio...

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Abstract

The invention provides a quantum dot light-emitting device, a backlight module and a liquid crystal display device. The quantum dot light-emitting device comprises a light-emitting device body used for generating first-wavelength excitation light, a second quantum dot packaging layer used for absorbing the first-wavelength excitation light to generate second-wavelength conversion light, and a third quantum dot packaging layer used for absorbing the first-wavelength excitation light to generate third-wavelength conversion light. The second quantum dot packaging layer is located between the light-emitting device body and the third quantum dot packaging layer, and the third wavelength is smaller than the second wavelength and larger than the first wavelength so that the excitation light conversion efficiency of a quantum dot material can be improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a quantum dot light emitting device, a backlight module and a liquid crystal display device. Background technique [0002] A liquid crystal display device is composed of a liquid crystal panel, a mechanism frame, optical components, and some circuit boards. Since the liquid crystal itself does not emit light, some backlight sources need to be configured to display the picture. Wherein, the backlight module is used to provide a backlight with uniform brightness and distribution for the liquid crystal display device, so that the liquid crystal display device can display images normally. [0003] In order to realize the high color gamut backlight, quantum dot technology can be used to realize the high color gamut backlight of 100% and above NTSC. Among them, quantum dots are semiconductor nanocrystals of 10nm and smaller, which can produce quantum confinement effects. Quantum dot...

Claims

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Application Information

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IPC IPC(8): G02F1/13357
CPCG02F1/133602G02F1/133603G02F1/133614
Inventor 李富琳
Owner HISENSE VISUAL TECH CO LTD
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