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Composite protective layer and flexible display unit

A flexible display device and flexible display technology, applied in the directions of synthetic resin layered products, layered products, adhesive additives, etc., can solve problems such as color distortion of flexible display devices, and achieve the effect of improving color distortion

Inactive Publication Date: 2018-05-04
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its own slight yellow hue, this kind of polyimide film will cause slight color distortion in flexible display devices when applied to flexible display panels

Method used

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  • Composite protective layer and flexible display unit
  • Composite protective layer and flexible display unit
  • Composite protective layer and flexible display unit

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Embodiment Construction

[0044] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0045] CIELAB is a color space determined by the International Commission on Illumination (CIE). The CIELAB color space uses a three-dimensional coordinate system: L*, a* and b*, where L* is about the brightness of the color, a* is about the position of the color between red and green; b* is about the position between red and blue; "*" values ​​represent normalized values ​​relative to standard white.

[0046] The embodiment of the present invention discloses a composite protective layer, including a polyimide layer, and a first hard coat layer and a first transparent optical adhesive layer respectively arranged on both side...

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Abstract

The invention relates to the field of display and in particular relates to a composite protective layer and a flexible display unit. The composite protective layer comprises a polyimide layer, and a first hard coating and a first transparent optical adhesive layer which are respectively arranged on two sides of the polyimide layer. At least one of the first hard coating and the first transparent optical adhesive layer contains a nanoscale coloring agent. The invention further relates to a flexible display unit comprising a flexible display panel and the composite protective layer arranged on alight-exiting side of the flexible display panel. The nanoscale coloring agent has a spectrum adjusting effect in a visible light band. The nanoscale coloring agent is added into the first hard coating or the transparent optical adhesive layer, so that light yellow introduced by the polyimide layer can be compensated to produce a needed color, and particularly the polyimide layer is matched to produce white transmission light; and therefore, the condition of color distortion is improved.

Description

technical field [0001] The invention relates to the display field, in particular to a composite protective layer and a flexible display device. Background technique [0002] With the development of display technology, flexible display devices are more and more widely used. The flexible display device includes a flexible display panel, a touch screen, a polarizing layer and a protective layer (Cover film) arranged on the light emitting side of the flexible display panel. [0003] Transparent polyimide film (Colorless PI Film) has excellent bending properties, thermal properties, mechanical properties and optical properties, so it can perfectly match the characteristics of flexible displays, and is an ideal protective layer material for future flexible display technologies. [0004] However, the polyimide films currently used in the industry for protective layers can still be observed to have a slight yellow tint, which corresponds to positive values ​​of b* (b*=0.5˜0.8) in t...

Claims

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Application Information

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IPC IPC(8): B32B27/06B32B27/28B32B33/00H01L27/32
CPCB32B27/06B32B27/281B32B33/00H10K59/88C09J2203/318C09J7/40C09J7/30C09J7/25C09J11/04C09J2479/086C08K2201/011C08K3/10C09J2301/312C09J2301/408H10K59/38H10K59/40H10K59/12H10K50/841H10K50/86H10K2102/311C08K7/24C09J2203/326C08K3/36C08K2003/2241C08K2003/2296C08K2003/222C08K2201/005C08K2003/0806C08K3/105C08K2003/0831H10K50/844H10K71/00H10K85/111H10K85/141
Inventor 卜德军蔡宝鸣刘陆陈立强李红李建伟杜双
Owner BOE TECH GRP CO LTD
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