Building control device with a light guide configured for uniformly illuminating a graphical symbol that is visible to a user of the building control device
US-2024264360-A1 · Aug 8, 2024 · US
Back light module and liquid crystal display thereof
US8937693B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8937693-B2 |
| Application number | US-201113378126-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 7, 2011 |
| Priority date | Dec 5, 2011 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The present invention discloses a back light module and a liquid crystal display (LCD) thereof. The back light module comprises a light guide plate, an optical sheet laid on the light transmission surface of the light guide plate, wherein the edge of the optical sheet is fixed to the light guide plate by a plurality of positioning structures. With application of the positioning structures, because the expansion coefficient of the optical sheet is not nearly to that of the frame but is close to the thermal expansion rate of the light guide plate, after the optical sheet is fixed to the light guide plate, the light guide plate is expanded along with the expansion of the optical sheet when subject to heating, and shrunk along with the shrinking of the optical sheet when the temperature drops. Thus, the optical sheet is not easy to warp due to the minimum performance change of the optical sheet and the light guide plate, and the temperature environment is also very similar because the optical sheet is near to the light guide plate. Therefore, as compared with the frame, the temperature of the optical sheet is more similar to that of the light guide plate, and the thermal expansion rate of the optical sheet is also similar to that of the light guide plate. Thereby, the warping of the optical sheet is further decreased.
First claim
Opening claim text (preview).
The invention claimed is: 1. A back light module, comprising a light guide plate and an optical sheet laid on a light transmission surface of the light guide plate; an edge of the optical sheet is fixed to the said light guide plate by a plurality of positioning structures, and a side surface between the light transmission surface and an opposite surface of the light transmission surface defines a fixing hole to fix one end of the positioning structure, wherein the positioning stru…
Assignees
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Classifications
Physics · mapped topic
Physics · mapped topic
- G02B6/0088Primary
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US8937693B2 cover?
- The present invention discloses a back light module and a liquid crystal display (LCD) thereof. The back light module comprises a light guide plate, an optical sheet laid on the light transmission surface of the light guide plate, wherein the edge of the optical sheet is fixed to the light guide plate by a plurality of positioning structures. With application of the positioning structures, beca…
- Who is the assignee on this patent?
- Yu Gang, Shenzhen China Star Optoelect
- What technology area does this patent fall under?
- Primary CPC classification G02B6/0088. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 20 2015 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).