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Backlight module, manufacture method thereof, and display device

A manufacturing method and backlight module technology, applied to optics, light guides, optical components, etc., can solve problems such as display contrast reduction, light guide plate damage, light leakage at the interface of optical waveguide, etc., and achieve the effect of improving contrast and ensuring collimation

Inactive Publication Date: 2019-08-23
BOE TECH GRP CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, when the light-taking grating is fabricated on the light-emitting side of the light guide plate, it will cause damage to the light-emitting surface of the light guide plate, increase the roughness of the light-emitting surface of the light guide plate, and cause light leakage at the interface of the light guide, resulting in a decrease in display contrast.

Method used

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  • Backlight module, manufacture method thereof, and display device
  • Backlight module, manufacture method thereof, and display device
  • Backlight module, manufacture method thereof, and display device

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Embodiment Construction

[0039] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0040] In the liquid crystal display device of the related art, such as figure 1 As shown, the backlight module includes a light bar 1 and a light guide plate 4. The light bar 1 includes a light source 2, a coupling grating 3, and a reflector 5. The Lambertian light of the light source 2 is gathered to a large angle and coupled into the light guide plate through the coupling grating 3. In 4, the light-taking grating 6 located on the light-emitting side of the light guide plate 4 takes out the large-angle light that is totally reflected and propagated in the light guide plate 4 at a collimation angle, realizing a collimated light source with high transmittance, in order to improve the light take-out efficiency A filling layer 7 is also ...

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Abstract

The invention provides a backlight module, a manufacture method thereof, and a display device, and belongs to the technical field of display. The manufacture method for the backlight module comprisesthe following steps that: forming a light getting optical grating material layer on the light emitting surface of a light guiding plate; through a nanoimprint technology, forming an imprinting adhesive graph on the light getting optical grating material layer; forming a photoresist graph which covers the imprinting adhesive graph in an area where the light getting optical grating needs to be formed; removing the imprinting adhesive graph which is not covered with the photoresist graph; and removing the photoresist graph, taking the residual imprinting adhesive graph as a mask to etch the lightgetting optical grating material layer, and forming the light getting optical grating. By use of the technical scheme of the invention, the contrast ratio of the display device can be improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module, a manufacturing method thereof, and a display device. Background technique [0002] The backlight module of the related art includes a light guide plate and a light-taking grating located on the light-emitting side of the light-guide plate. direct light source. However, when the light-taking grating is fabricated on the light-emitting side of the light guide plate, it will damage the light-emitting surface of the light guide plate, increase the roughness of the light-emitting surface of the light guide plate, and cause light leakage at the interface of the light guide, resulting in a decrease in display contrast. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a backlight module, its manufacturing method, and a display device, which can improve the contrast of the display device. [0004] In ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00G03F7/00
CPCG02B6/005G02B6/0065G03F7/0002
Inventor 谭伟董水浪谭纪风孟宪东
Owner BOE TECH GRP CO LTD
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