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Quantum dot backlight source and liquid crystal display device

A technology of quantum dots and backlights, applied in the field of quantum dots backlights and liquid crystal display devices, can solve problems such as inability to realize 3D display

Inactive Publication Date: 2016-03-30
NANJING INST OF ADVANCED LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, current liquid crystal display devices generally cannot realize 3D display with spectral separation.

Method used

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  • Quantum dot backlight source and liquid crystal display device
  • Quantum dot backlight source and liquid crystal display device
  • Quantum dot backlight source and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Please also refer to figure 1 with figure 2 , the first embodiment of the present invention provides a quantum dot backlight 100, which includes a first light source 10, a second light source 20, a first quantum dot phosphor 30 with a first spectral band, a second quantum dot phosphor with a second spectral band Quantum dot phosphor powder 40 and first light guide plate 50, the first light emitted by the first light source 10 excites the first quantum dot phosphor powder 30 to generate light in the first spectral band, and enters the light through the first light guide plate for viewing The second light emitted by the second light source 20 excites the second quantum dot phosphor to generate light in the second spectral band, and enters the right eye of the viewer through the first light guide plate.

[0033] It can be understood that, in this embodiment, the optical element includes the first light guide plate 50 .

[0034] The first light source 10 and the second l...

Embodiment 2

[0043] Image 6 It is a side view of the quantum dot backlight 200 provided in the second embodiment of the present invention. The difference from the quantum dot backlight 100 in the first embodiment is that the optical element includes a stacked second light guide plate 70 and a third light guide plate. The light plate 75, that is, the optical element in this embodiment has one more light guide plate than that in the first embodiment. The first quantum dot phosphor 30 and the second quantum dot phosphor 40 are respectively disposed on the side of the second light guide plate 70 and the side of the third light guide plate 75 . Thus, the blue light emitted by the first blue laser 11 excites the first quantum dot phosphor powder 30 to emit the first red light R1, the first green light G1, and the first blue light B1, which are coupled to the second light guide plate 70 and pass through the The second light guide plate 70 enters the left eye of the viewer to form an image for t...

Embodiment 3

[0048] see Figure 8 , the third embodiment of the present invention provides a quantum dot backlight 300, which includes a first light source 10, a second light source 20, a first quantum dot phosphor 30 with a first spectral band, a second quantum dot phosphor with a second spectral band Quantum dot phosphor powder 40 and diffusion sheet 80, a plurality of first quantum dot phosphor powder 30 and a plurality of second quantum dot phosphor powder 40 are arranged alternately below the diffusion sheet 80, the first quantum dot phosphor powder The first light source 10 and the second light source 20 are correspondingly arranged under the powder 30 and the second quantum dot phosphor 40 respectively.

[0049] It can be understood that, in this embodiment, the optical element includes a diffusion sheet 80 instead of a light guide plate.

[0050] Same as the first embodiment of the present invention, in this embodiment, the first light source 10 includes a first blue laser 11 and ...

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PUM

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Abstract

The invention provides a quantum dot backlight source. The quantum dot backlight source is composed of a first light source, a second light source, first quantum dot fluorescent powder with a first spectral band, second quantum dot fluorescent powder with a second spectral band and an optical element. First light emitted by the first light source stimulates the first quantum dot fluorescent powder to generate first-spectral-band light, and the first-spectral-band light enters the left eye of a viewer through the optical element; second light emitted by the second light source stimulates the second quantum dot fluorescent powder to generate second-spectral-band light, and the second-spectral-band light enters the right eye of a viewer through the optical element. According to the quantum dot backlight source, the first quantum dot fluorescent powder and the second quantum dot fluorescent powder with different spectral bands are used for emitting the first-spectral-band light and the second-spectral-band light respectively, the first-spectral-band light and the second-spectral-band light enter the left eye and the right eye of the viewer respectively through a first light guide plate, and therefore a liquid crystal display device with the quantum dot backlight source can achieve spectral separation 3D display effectively.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a quantum dot backlight source and a liquid crystal display device capable of realizing spectrally separated 3D display. Background technique [0002] The backlight source is an important part of the liquid crystal display device. Since the liquid crystal molecules themselves do not emit light, additional equipment is needed to provide it with a light source. Most of the existing backlight sources are LED light sources, but the current scheme of using blue LEDs with phosphors to emit white light results in a lower color gamut of liquid crystal display devices due to a wider spectrum. At present, the technology that has greatly improved the color gamut in liquid crystal display is quantum dot technology. The basic principle is that blue LED excites quantum dot phosphors to emit red light and green light, and the three are combined into white light. [0003] Spectrum separation t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02B27/22
CPCG02F1/1336G02B30/24G02F1/133614
Inventor 王欢
Owner NANJING INST OF ADVANCED LASER TECH