Optical film for display device and display device having the same
US-2020348557-A1 · Nov 5, 2020 · US
Optically diffusive film with elongated structures
US12523801B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12523801-B2 |
| Application number | US-202117923269-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 26, 2021 |
| Priority date | May 8, 2020 |
| Publication date | Jan 13, 2026 |
| Grant date | Jan 13, 2026 |
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- Title
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Abstract
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An optically diffusive film includes an optical substrate layer with opposing first and second major surfaces; and an optical layer disposed on the second major surface of the optical substrate layer and including a structured major surface having a plurality of spaced apart elongated structures elongated along a same first direction and arranged at a substantially uniform density, each elongated structure including a peak such that, in a plane of a cross-section of the elongated structure that is parallel to the first direction and comprises the peak, the elongated structure has a substantially flat top region; wherein for substantially normally incident light and a visible wavelength range and an infrared wavelength range, the optical substrate layer has an average total transmittance or reflectance of greater than about 60% in the visible wavelength range and an average specular transmittance of greater than about 60% in the infrared wavelength range.
First claim
Opening claim text (preview).
What is claimed is: 1 . An optically diffusive film comprising: a unitary optical layer comprising a first major surface and an opposing structured second major surface comprising a plurality of spaced apart elongated structures elongated along a same first direction and arranged at a substantially uniform density of between about 5 to 100 structures per square mm across the second major surface, each elongated structure comprising a peak such that in a plane of a cross-section of the elongated structure that comprises the peak and is parallel to: the first direction, the elongated structure has a length L1, a height variation of less than about 5% across a substantially flat top region having a length d, d/L1≥0.15, and a full width at half maximum W1; and a second direction orthogonal to the first direction, the elongated structure has a full width at half maximum W2, W2/W1≤0.6, wherein: a power spectral density of the structured second major surface has a first peak along the first direction having a first peak intensity I1 and a second peak along the second direction having a second peak intensity I2, 1≤I1/I2≤10,000. 2 . The optically diffusive film of claim 1 , wherein 10≤I1/I2≤10,000. 3 . The optically diffusive film of claim 1 , wherein 100≤I1/I2≤10,000.
Assignees
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Classifications
creating an anisotropic diffusion characteristic, i.e. distributing output differently in two perpendicular axes · CPC title
adapted to provide an additional optical effect, e.g. anti-reflection or filter · CPC title
used in reflection · CPC title
characterized by the fabrication or manufacturing method · CPC title
in the form of a thin sheet or foil, e.g. Polaroid · CPC title
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- What does patent US12523801B2 cover?
- An optically diffusive film includes an optical substrate layer with opposing first and second major surfaces; and an optical layer disposed on the second major surface of the optical substrate layer and including a structured major surface having a plurality of spaced apart elongated structures elongated along a same first direction and arranged at a substantially uniform density, each elongat…
- Who is the assignee on this patent?
- 3M Innovative Properties Company
- What technology area does this patent fall under?
- Primary CPC classification G02B5/021. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 13 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).