Side entry type backlight module set and liquid crystal display device

An edge-type backlight and module technology, applied in the field of edge-type backlight modules and liquid crystal display devices, can solve the problems of chromatic aberration, affecting viewing effects, and large light loss, etc.

Active Publication Date: 2017-09-15
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the wavelength conversion layer extends in the length direction, since the light emitted by the light-emitting element is lost during the traveling process, the farther the wavelength conversion layer is from the light-emitting element in the length direction, the greater the loss of light. After the light converted by the wavelength conversion layer is mixed, there will be chromatic aberration, which will affect the viewing effect

Method used

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  • Side entry type backlight module set and liquid crystal display device
  • Side entry type backlight module set and liquid crystal display device
  • Side entry type backlight module set and liquid crystal display device

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Please refer to image 3 , in this embodiment, the light emitting element 310 is a blue LED, the light guide plate 330 is a flat light guide plate, the blue light emitted by the blue LED enters from the light incident surface 331, and exits from the light exit surface 333 and propagates to the wavelength conversion layer 350, Part of the blue light exposed from below can be reflected by the reflective sheet 335 and then enter the light guide plate 330 and propagate to the wavelength conversion layer, thereby improving light utilization. The blocking layer 370 is used to protect the wavelength conversion layer 350 . In this embodiment, the quantum dots 351 are red quantum dots and green quantum dots, and the dispersion medium 353 in the wavelength conversion layer 350 has continuity, that is, each part of the wavelength conversion layer 350 has continuity, and there is no interval between them. The quantity distribution of the red quantum dots and green quantum dots disp...

Embodiment 2

[0067] Please refer to Figure 5 , in this embodiment, the edge-lit backlight module 400 includes a blue LED 410 coated with fluoride phosphor, a light guide plate 430 , a wavelength conversion layer 450 with green quantum dots 451 and a dispersion medium 453 , and a blocking layer 470 . The difference between this embodiment and Embodiment 1 is that the light guide plate 430 is a wedge-shaped light guide plate. Group 400 may be suitable for a notebook computer display. Similarly, the wavelength conversion layer 450 in this embodiment has a similar structure to the wavelength conversion layer 450 in Embodiment 1, and the thickness of the wavelength conversion layer 450 is controlled so that the green quantum dots 451 are coated with fluoride The distance of the phosphor blue LED 410 becomes longer and less. The change of the number of green quantum dots 451 can refer to Figure 4 shown in the relationship diagram. Certainly, the light-emitting element in this embodiment ma...

Embodiment 3

[0069] Please refer to Figure 6 , Figure 7 , in this embodiment, the light emitting element 510 is a blue LED, the light guide plate 530 includes a light incident surface 531, a light exit surface 533 and a reflective sheet 535, and the quantum dots 551 dispersed in the dispersion medium 553 in the wavelength conversion layer 550 are red For quantum dots and green quantum dots, the barrier film 570 is used to protect the wavelength conversion layer. The thickness of the wavelength conversion layer 550 in the length direction is the same. In this embodiment, the distribution of the number of quantum dots is realized by changing the concentration of the red quantum dots and the green quantum dots in the wavelength conversion layer 550. Specifically, with the light-emitting element The farther the distance from 510, the lower the concentration of red QDs and green QDs. At a distance from the light-emitting element 510, the blue light emitted by the light-emitting element 510 ...

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Abstract

The present invention discloses a side entry type backlight module set and a liquid crystal display device. The backlight module set includes a light emitting element, a light guide plate and a wavelength conversion layer; and as a distance between the wavelength conversion layer and the light emitting element is increased, the light emission strength of light converted at a corresponding position of the wavelength conversion layer is decreased in the aspect of an overall trend. According to the side entry type backlight module set and the liquid crystal display device of the invention, the light emission strength of the light converted by the wavelength conversion layer can be changed according to the change of the optical path of light emitted by the light emitting element, so that the light converted by the wavelength conversion layer can be matched with the light emitted by the side entry type backlight source, and mixed light is free of chromatic aberration, so that a viewing effect will not be affected by chromatic aberration. The liquid crystal display device comprises the side entry type backlight module set.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an edge-type backlight module and a liquid crystal display device. Background technique [0002] The backlight module is usually installed in the liquid crystal display panel and is one of the key components of the liquid crystal display panel. It is used to supply sufficient brightness and uniformly distributed light source so that the liquid crystal display panel can display normally. According to the position of the light-emitting element in the backlight module, the backlight module can generally be divided into a direct-type backlight module and an edge-type backlight module. [0003] Due to the requirements of thinner and lighter, the side-type backlight module has been paid more and more attention. Generally, the side-type backlight module includes a light-emitting element, a light guide plate, and a wavelength conversion layer. The light-emitting element is arranged on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G02F1/13357
CPCG02B6/005G02F1/133615G02F1/133614
Inventor 方龙席玉坤
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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