Electrochromic films, color-changing devices, and terminal products

By introducing a blocking portion at the edge of electrochromic films, particularly at corners, the film's current conduction is managed to prevent premature failure, ensuring uniform electric field strength and extended service life.

JP2026521955APending Publication Date: 2026-07-02GUANGYI INTELLIGENT TECH (SUZHOU) CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
GUANGYI INTELLIGENT TECH (SUZHOU) CO LTD
Filing Date
2024-06-14
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Electrochromic films experience early failure at the discoloration end point, particularly in the corner areas, due to uneven current distribution and localized overcharging or over-discharging, leading to non-uniform electric field strength and reduced service life.

Method used

Incorporating a blocking portion at the edge of the electrochromic film, specifically at corners or regions of low surface resistance, to interrupt or reduce current conduction, thereby balancing the electric field strength and preventing premature failure.

Benefits of technology

The blocking portion enhances the uniformity of current distribution, reduces the risk of localized aging, and extends the service life of the electrochromic film by preventing overcharging or over-discharging, especially at corners.

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Abstract

This disclosure provides an electrochromic film, a color-changing device, and terminal products, and belongs to the field of electrochromic technology. The electrochromic film includes a central portion and an edge portion adjacent to the central portion, a busbar electrically connected to the edge portion, and a break-off portion provided in at least a portion of the edge portion, which prevents or reduces the conduction of current from the busbar from the break-off portion to the central portion. This prevents current from being directly conducted from the conductive layer with the break-off portion to the conductive layer of the central portion, or reduces the current conducted from the conductive layer with the break-off portion to the conductive layer of the central portion, prevents failure due to overcharging or over-discharging in the corner region of the electrochromic film, improves the stability and uniformity of the electric field strength of the electrochromic film, and extends the service life of the electrochromic film.
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