A reinforcing method for improving the anti-vibration performance of a backlight module of a liquid crystal display

By employing plasma cleaning and OCA optical adhesive in a U-shape coating and hot-press curing process, the problem of fixing and reliability of backlight modules under vibration environments has been solved, achieving improved component stability and optical performance, making it suitable for automotive and industrial control equipment.

CN122284167APending Publication Date: 2026-06-26AVIC EAST CHINA OPTOELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
AVIC EAST CHINA OPTOELECTRONICS CO LTD
Filing Date
2026-04-10
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing LCD backlight modules lack sufficient reliability in vibration or shock environments, leading to component loosening, misalignment, friction noise, and optical defects, making it difficult to meet the stability requirements of applications such as automotive and industrial control.

Method used

After precise alignment using plasma cleaning pretreatment and vacuum adsorption equipment, an elastic internal stress buffer layer is formed by OCA optical adhesive in a U-shape coating and stepped hot pressing curing, ensuring precise alignment between layers and overall curing to form an elastic frame structure.

Benefits of technology

It significantly improves the vibration resistance of the backlight module, eliminates interlayer micro-friction, suppresses noise and wear, maintains optical performance, and enhances environmental reliability and shock resistance.

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Abstract

This invention relates to the field of liquid crystal display technology, specifically to a method for strengthening the vibration resistance of a liquid crystal display backlight module, comprising the following steps: material pretreatment; precise alignment and lamination: a light guide plate, a diffusion film, prism film 1, prism film 2, and a polarizing brightness enhancement film are sequentially laminated using a vacuum adsorption device; OCA optical adhesive coating: for each layer, OCA optical adhesive is applied using a high-precision dispensing machine, wherein prism film 2 and prism film 1, and the polarizing brightness enhancement film and prism film 2 are coated in a U-shape along the edges to form a closed rectangular adhesive frame; stepped hot-press curing: after lamination and coating, segmented pressure is applied combined with gradient heating to promote the leveling of the adhesive and form an elastic internal stress buffer layer. This invention eliminates interlayer micro-friction through overall curing, eliminating vibration noise and wear; suppresses temperature-induced delamination, improving environmental reliability; maintains optical performance without damage, preserving brightness enhancement efficiency; and achieves a breakthrough improvement in impact resistance.
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