Backlight Optical Films and Light Guide Patents: Top Companies & Trends 2026
Backlight Optical Films and Light Guide Plate Patents: Who Leads and Where the Claim Space Is Still Open
Concentrated at the top. The five leading assignees together hold 49.2% of all 8,764 records in scope, and the leading ten hold 63.4% — a small group controls most of the filed claim space. Filings hit 629 in 2017 and have not returned to that level since. Comparing 2021 (270) to 2024 (191) — the last year the dataset treats as complete — volume is down 29%. Years after 2024 show far fewer records, but that reflects publication lag rather than a real drop in filing activity.
- 1LG INNOTEK CO LTD14.5%
- 2SUZHOU LEKIN SEMICON CO LTD13.4%
- 3SAMSUNG ELECTRONICS CO LTD8.0%
- 4SAMSUNG DISPLAY CO LTD7.8%
- 5SEMICON ENERGY LAB CO LTD5.6%
See the full backlight optical films and light guides analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
Who holds the most patents on light guide plates and backlight optical films?
Filing in this space is concentrated: the five leading assignees together hold 49.2% of the 8,764 records in scope, and the leading ten hold 63.4%. The top-ranked assignee alone holds 1,268 records, well ahead of the fifth-place holder at 490 and the tenth-place holder at 132. This means a small group of large display and semiconductor manufacturers controls most of the filed claim space, and any new entrant needs to check its specific portfolios before drafting core geometry or extraction-structure claims.
Is patent filing in backlight optical films still growing?
Filing peaked at 629 records in 2017 and has not returned to that level since. Comparing 2021 (270 records) to 2024 (191 records) — the most recent year the dataset treats as complete — volume is down 29%. Years after 2024 show far fewer records, but that reflects an 18-month-or-so publication lag rather than an actual collapse in activity, so the trend should be read as a pullback from a 2017 high rather than a currently accelerating decline.
What technology areas do backlight film and light guide patents fall under?
The dataset’s records carry several IPC subclasses at once, most commonly H01L (semiconductor devices, 51.4% of the 8,764 records), G02F (optical control and modulation, 29.8%) and F21V (lighting device components, 26.1%). Smaller but meaningful shares fall under G02B optical elements (14.3%) and H10K organic semiconductors including OLED (6.9%). The pattern shows most filers frame their light guide or film claims as part of an integrated display or lighting device rather than as a standalone optical component.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Backlight Optical Films and Light Guides covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.