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Compound optical sheet and back light unit (BLU) with same as well as display device

A backlight module, optical sheet technology, applied in optics, nonlinear optics, chemical instruments and methods, etc., can solve the problems of complex process, thin thickness, low reliability, etc., to simplify the assembly process, reduce light loss, heat Reliable effect

Active Publication Date: 2013-08-07
CCS (SHANGHAI) FUNCTIONAL FILMS IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, in the structure using such an optical film, since it is necessary to separately use a diffusion sheet, a prism sheet, DBEF, etc., the process of assembling the backlight module is complicated, and the thickness of each sheet is low, so the reliability is low.

Method used

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  • Compound optical sheet and back light unit (BLU) with same as well as display device
  • Compound optical sheet and back light unit (BLU) with same as well as display device
  • Compound optical sheet and back light unit (BLU) with same as well as display device

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0035] Such as figure 2 It is a structural schematic diagram of a composite optical sheet provided by an embodiment of the present invention. The composite optical sheet 200 includes: a prism layer 210, a polyester (PET) film layer 220, a diffusion layer 230, a reflective polarizing layer 240 and an anisotropic Sexual diffusion layer 250.

[0036] The prism layer 210 is located on the bottom layer of the composite optical sheet 200 . The light emitted by the ligh...

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Abstract

The embodiment of the invention provides a compound optical sheet and a back light unit (BLU) with the same as well as a display device. The compound optical sheet is composed of a prism layer, a polyester (PET) layer, a diffusion layer, a reflection polarized light layer and an anisotropic diffusion layer which are sequentially laminated from the bottom up, wherein, the reflection polarized light layer comprises more than 3 layers of cholesteric liquid crystal coatings, and the reflected center wavelength of the cholesteric liquid crystal layer at the uppermost side is 520-550nm; the diffusion layer is bound with the reflection polarized light layer through a bonding agent, and every two neighboring cholesteric liquid crystal coatings of the reflection polarized light layer are bound with each other through a bonding agent; and the bonding agents have the maximum thermal expansion coefficient among all the components. The compound optical sheet has the functions of light convergence,diffusion and reduction of light loss at the same time; and in addition, a multi-layer structure is adopted and the coatings are bound together by the bonding agents so as to form the thick compound optical sheet, thus simplifying the assembly procedure and improving the reliability of the optical sheet.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a composite optical sheet, a backlight module and a display device having the composite optical sheet. Background technique [0002] Nowadays, liquid crystal display devices (Liquid Crystal Display device, LCD) have widely replaced traditional display devices, and backlight modules (Back Light Unit, BLU) are components that provide light sources in liquid crystal display devices. The quality of backlight modules is very high. To a large extent, it determines the display quality of liquid crystal display devices. [0003] Such as figure 1 Shown is a cross-sectional view of a backlight module of a liquid crystal display device in the prior art. Such as figure 1 As shown, the backlight module 100 adopts a side-type light source arrangement, which includes a light source portion 110 , a light guide plate 120 , a reflection sheet 130 and an optical sheet 140 . [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06G02F1/13357B32B9/04B32B27/36G02F1/1335G02B5/04B32B17/10
Inventor 金青松王清
Owner CCS (SHANGHAI) FUNCTIONAL FILMS IND CO LTD
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