Optical biaxially stretched plastic film, polarizing plate, image display device, and method of selecting optical biaxially stretched plastic film
US-2022342135-A1 · Oct 27, 2022 · US
Optical inspection device for optical performance test of display device and optical inspection method using the same
US12025571B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12025571-B2 |
| Application number | US-202117222840-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 5, 2021 |
| Priority date | Aug 20, 2020 |
| Publication date | Jul 2, 2024 |
| Grant date | Jul 2, 2024 |
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Abstract
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An optical inspection device for an optical performance test of a display device including a lens part configured to transmit external light, a phase film part configured to change a phase difference of the external light and transmit the external light, and an image processor configured to obtain electrical information of the external light, in which a phase difference of the phase film part is at least 7000 nm.
First claim
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What is claimed is: 1. An optical inspection device for an optical performance test of a display device, comprising: a main body; a lens part disposed on the main body and configured to transmit external light; and a phase film part disposed between the main body and the lens part, and configured to change a phase difference of the external light and transmit the external light; and a phase retardation part disposed between the phase film part and the lens part, the phase retardation part being configured to retard a phase of light provided thereto, wherein the main body includes an image processor configured to obtain electrical information of the external light, and wherein a phase difference of the phase film part is at least 7000 nm. 2. The optical inspection device of claim 1 , wherein the phase retardation part comprises a λ/4 phase retardation layer. 3. The optical inspection device of claim 1 , wherein the phase film part has a phase difference of at least 8000 nm. 4. The optical inspection device of claim 1 , wherein the phase retardation part has a second optical axis, and an angle defined between the second optical axis and one of the first absorption axis and the first transmission axis is in a range of 25 degrees to 65 degrees. 5. The optical inspection device of claim 1 , wherein the phase retardation part has a second optical axis, and an angle defined between the second optical axis and the first polarizing axis is in a range of 25 degrees to 65 degrees. 6. The optical inspection device of claim 1 , further comprising a polarizing part having a first absorption axis and a first transmission axis vertical to the first absorption axis, the polarizing part being configured to not transmit light parallel to the first absorption axis and transmit light parallel to the first transmission axis, wherein the main body further includes a polarizer having a first polarizing axis. 7. The optical inspection device of claim 6 , wherein an angle defined between the first polarizing axis and the first absorption axis or the first transmission axis is in a range of 25 degrees to 65 degrees. 8. The optical inspection device of claim 6 , wherein the phase film part has a first optical axis, and an angle defined between the first optical axis and one of the first absorption axis and the first transmission axis is in a range of 25 degrees to 65 degrees. 9. The optical inspection device of claim 6 , wherein the phase film part has a first optical axis, and an angle defined between the first optical axis and the first polarizing axis is in a range of 25 degrees to 65 degrees.
Assignees
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Classifications
- G01M11/02Primary
Testing optical properties · CPC title
Liquid crystal panels · CPC title
Polarisation of light · CPC title
Measuring properties of electrooptical or magnetooptical media · CPC title
- G02F1/1309Primary
Repairing; Testing · CPC title
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- What does patent US12025571B2 cover?
- An optical inspection device for an optical performance test of a display device including a lens part configured to transmit external light, a phase film part configured to change a phase difference of the external light and transmit the external light, and an image processor configured to obtain electrical information of the external light, in which a phase difference of the phase film part i…
- Who is the assignee on this patent?
- Samsung Display Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01M11/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 02 2024 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).