The hole in printed circuit board is used to fix the LCM as shown in the picture below. Attend to the following items when installing the LCM.
1.ˇˇˇˇCover the surface with a transparent protective plate to protect the polarizer and LC cell.
2.ˇˇˇˇ When assembling the LCM into other equipment, the spacer to the bit between the LCM and the fitting plate should have enough height to avoid causing stress to the module surface. Refer to the individual specifications for measurements. The measurement tolerance should be ˇŔ 0.1mm.