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What are the precautions for the use of light guides and diffusion sheets in LCD liquid crystal displays?

Jan. 19, 2022

1. LCD liquid crystal display in the light guide and diffusion sheet (acrylic) surface hardness is comparable to aluminum (relatively soft). Please pay attention to protect the surface when handling. If damaged, polish with yellow aluminum abrasive. That is, it is easy to restore the original beautiful surface. Acrylic has a large coefficient of thermal expansion, and its degree of expansion is about several times that of metal. Installation or fixed should take into account the temperature changes, leaving room for expansion and contraction.

2. light guide sheet has the same expansion coefficient as ordinary plastic, the use of temperature changes must be fully considered when the expansion and contraction caused by temperature changes. Therefore, when installing and storing the light guide, the room temperature should be kept at about 25℃.

3. temperature changes will also cause the expansion and contraction of the light guide sheet. The speed of this change is not as obvious as the change caused by temperature, but it must be paid attention to when it is in use. Therefore, the installation and storage of light guide plate, indoor humidity should be maintained at 50-60. % RH.


Acrylic Diffuser Sheet


4. 100,000 class and above clean room recommended installation of light guide; all staff must wear masks to avoid bright spots between the light guide, reflective sheet and diffusion sheet; in order to protect the hand and also protect the light guide, you must wear powder-free latex gloves when working (other types of gloves are not allowed) to avoid hand sweat and fingerprints, to avoid black and white spots and dark shadows caused by scratches.

5. Before assembly, use electrostatic precipitator to remove dust, IPA (isopropyl alcohol) to clean the surface stains to avoid black and white spots.

6. Please assemble the product immediately after unpacking to avoid dust particles from entering.

7. If the product has stains, hand sweat, fingerprints, etc., use IPA (isopropyl alcohol, no other ingredients) and a dust-free cloth to wipe it clean. Make sure it is completely dry before assembling.

8. In order to protect the light guide, its surface is affixed with protective film. In order to avoid scratches and dust, when handling the light guide plate, you should try to put on the protective film and tear off the protective film at last.

9. After the finished product is packed, please do a good job of moisture-proof and moisture-proof treatment to avoid moisture intrusion.

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