Precautions for using liquid crystal display devices
Attention should be paid to the use, installation, maintenance and maintenance of liquid crystal display devices:
(1) Avoid applying pressure to the device surface. The liquid crystal display device is packaged into a box by two waves, and the liquid crystal is poured into the space between them, the gap is 5-7μm, and the inner surface is covered with a fine molecular orientation film, which is easily damaged by a slight external force. Therefore, remember that the pressure should be even when installing, only on the side, not on the center. In case a certain pressure (such as pressing by hand) is applied during use, it should be left for a period of time before powering on.
(2) Prevent wave damage. The design of the whole machine should consider vibration resistance.
(3) Protection pins. When installing plug-in pin-type liquid crystal display devices, force evenly and do not use violent force. If welding, the pins should be as long as possible to avoid local overheating and open circuit.
(4) The device is moisture-proof. Due to the low voltage and low power consumption of the liquid crystal, the glass surface may be affected by moisture, which may cause display crosstalk. If the environment is humid, a moisture-proof case should be designed.
(5) Prevent scratches and pollution. The surface of the liquid crystal display device is a light-shielding sheet made of plastic, which is easily scratched. Therefore, do not remove the surface protective film during assembly. In addition, hand sweat, oil, cosmetics, etc. should be strictly prevented from polluting the surface, as any pollution is not easy to remove.
(6) Prevent direct current. The DC component in the drive will cause electrochemical reaction, causing deterioration and damage. Therefore, when designing the circuit, the back drive pulse should be introduced into the two frequency division circuit to eliminate the DC component.
(7) UV protection. Liquid crystals and polarizers are organic substances, which will produce photochemical reactions and deterioration under ultraviolet radiation, especially light-blocking films. Therefore, products that are often used in the sun should be equipped with anti-ultraviolet color filters.
(8) Use and store within the specified temperature range. When the upper temperature limit is exceeded, the liquid crystal state disappears, and the entire screen turns black, but it can be restored, and the lower temperature limit is exceeded. If the liquid crystal crystallizes, the alignment layer will be destroyed and cannot be recovered.
(9) Anti-static interference. Due to micro-power consumption and low-voltage operation, any static electricity may cause crosstalk or garbled display.
