Anti-scratch brightening film

A brightness-enhancing film and anti-scratch technology, applied to prisms and other directions, can solve problems such as poor improvement effect, difficulty in ensuring optical gain value, and scratches on sharp edges and corners of small protrusions, so as to avoid changes in optical gain value, The effect of stabilizing the optical gain value and improving the optical quality

CN103744136BActive Publication Date: 2016-09-28ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-09-28

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Abstract

The invention discloses a scratch-resistant brightness enhancement film which comprises a transparent base layer and a structural layer arranged on the transparent base layer. The structural layer comprises a single-peak prism columnar structure and a multi-peak columnar structure; the single-peak prism columnar structure comprises a first prism; the multi-peak columnar structure comprises at least one overlapped second prism and at least one supporting part; the height of each supporting part is greater than or equal to the highest peak height of each prism; and the height of each second prism is greater than the highest peak height of the first prism. By arranging the supporting parts higher than the second prisms at both left and right sides of the second prisms, scratches at the upper, lower, left and right parts of the prisms can be effectively resisted; and the second prisms are arranged and the total width of the bottom edges of the second prisms is less than or equal to 75 percent of the total width of the bottom edge of the multi-peak columnar structure, so that the ratio of the prisms in an optical film is effectively increased and effects of avoiding variation of an optical gain value of the brightness enhancement film, ensuring optical performance of the brightness enhancement film and improving optical quality when effectively solving the problems of scratches of the prisms and the like are implemented.
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Description

technical field

[0001] The invention belongs to the technical field of optical film production, and in particular relates to a scratch-resistant brightness-enhancing film. Background technique

[0002] Brightness enhancement film refers to the thin film or sheet used in TFT (Thin Film Field Effect Transistor) LCD backlight module to improve the luminous efficiency of the entire backlight system. There are four main types, normal prism sheet, multifunctional Prism sheet, micro-lens film, reflective polarizer, etc. Each optical film also has different market characteristics.

[0003] A common brightness enhancement film is composed of a flat substrate and multiple prisms for converging light. These prism strips form a prism array in one direction, such as figure 1 shown. In practical applications, the traditional prism structure enhancement film will be used in conjunction with other optical films, and it is easy to scratch the sharp edges and corners of the prism structure,...

Examples

Embodiment Construction

[0033] In practical applications, the traditional prism structure brightness enhancement film will be used in conjunction with other optical films, and it is easy to cause scratches on the sharp edges and corners of the prism structure, thereby affecting the optical quality. At present, some companies have changed the prism from a triangular design to a semi-cylindrical shape to produce stronger deformation resistance, but the luminance provided by this structure has decreased. Or add a number of prism columns with rounded corners or platforms on the top of the traditional brightness-enhancing film prism array to achieve the effect of scratch resistance. However, this structure will lead to a decrease in optical gain value, poor light output effect, and affect optical quality. In addition, there is another way to provide small protrusions on the right-angle prism column to resist scratches, but this method still cannot solve the problem of the sharp edges and corners of the sma...