Backlight assembly and display apparatus
US-2019146137-A1 · May 16, 2019 · US
Viewing angle controlling film, backlight unit using the same and display device using the same
US10928660B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10928660-B2 |
| Application number | US-201815988106-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 24, 2018 |
| Priority date | May 26, 2017 |
| Publication date | Feb 23, 2021 |
| Grant date | Feb 23, 2021 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
A viewing angle controlling film, a backlight unit using the same, and a display device using the same are disclosed. The viewing angle controlling film comprises a first area where light transmittance is not converted; and a second area where light transmittance is converted, wherein the second area includes a light-transmittance conversion portion configured to react with light of a predetermined wavelength range to convert the light transmittance and not to react with light of a wavelength range other than the predetermined wavelength range.
First claim
Opening claim text (preview).
What is claimed is: 1. A viewing angle controlling film, comprising: a first area where light transmittance is not converted; a second area where light transmittance is converted; and a third area adjoining the first area laterally and overlapping the second area vertically, a material of the third area being different from each of a material of the second area and a material of the first area, wherein the second area includes a first light-transmittance conversion portion configured to react with light of a predetermined wavelength range to convert the light transmittance and not to react with light of a wavelength range other than the predetermined wavelength range, and wherein the third area includes an opaque area having a light-shielding portion. 2. The viewing angle controlling film of claim 1 , wherein the first light-transmittance conversion portion includes a photo-reactive transmittance conversion material of which light-transmittance is reversibly converted by being reacted with light of the predetermined wavelength range without being reacted with the light of the wavelength range other than the predetermined wavelength range, and the photo-reactive transmittance conversion material is contained in the first light-transmittance conversion portion in the range of 1 weight % to 20 weight %. 3. The viewing angle controlling film of claim 1 , further comprising a protective portion for sealing the first light-transmittance conversion portion, wherein beads are included in the protective portion. 4. The viewing angle controlling film of claim 1 , wherein the first area includes a transparent area, and adjoins the second area laterally. 5. A viewing angle controlling film, comprising: a first area where light transmittance is not converted; a second area where light transmittance is converted; and a third area adjoining the first area laterally and overlapping the second area vertically, a material of the third area being different from each of a material of the second area and a material of the first area, wherein the second area includes a first light-transmittance conversion portion configured to react with light of a predetermined wavelength range to convert the light transmittance and not to react with light of a wavelength range other than the predetermined wavelength range, and wherein the third area includes a second light-transmittance conversion portion, and a wavelength range of light with which the first light-transmittance conversion portion is reacted is different from a wavelength range of light in which the second light-transmittance conversion portion is reacted. 6. A viewing angle controlling film, comprising: a first area where light transmittance is not converted; a second area where light transmittance is converted; and a third area adjoining the first area laterally and overlapping the second area vertically, a material of the third area being different from each of a material of the second area and a material of the first area, wherein the second area includes a first light-transmittance conversion portion configured to react with light of a predetermined wavelength range to convert the light transmittance and not to react with light of a wavelength range other than the predetermined wavelength range, and wherein the third area includes a second light-transmittance conversion portion, each of the first light-transmittance conversion portion and the second light-transmittance conversion portion includes a photo-reactive transmittance conversion material of which light-transmittance is reversibly converted by being reacted with light of the predetermined wavelength range without being reacted with the light of the wavelength range other than the predetermined wavelength range, and a content of the photo-reactive transmittance conversion material contained in the first light-transmittance conversion portion is different from a content of the photo-reactive transmittance conversion material contained in the second light-transmittance conversion portion.
Assignees
Inventors
Classifications
2-D arrangement of prisms, protrusions, indentations or roughened surfaces · CPC title
for controlling the direction of light (in light guides G02B6/35) · CPC title
- G02B26/02Primary
for controlling the intensity of light {(G02B26/004 takes precedence)} · CPC title
Direct backlight · CPC title
providing two modes of illumination, e.g. day-night · CPC title
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Frequently asked questions
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- What does patent US10928660B2 cover?
- A viewing angle controlling film, a backlight unit using the same, and a display device using the same are disclosed. The viewing angle controlling film comprises a first area where light transmittance is not converted; and a second area where light transmittance is converted, wherein the second area includes a light-transmittance conversion portion configured to react with light of a predeterm…
- Who is the assignee on this patent?
- Lg Display Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B26/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 23 2021 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).