How To Replace Laptop

Ever wondered how a laptop LCD works? These liquid crystal displays are a favorite among laptops as they are sleeker and lighter. They also consume less power.

Now let's go back to your question. How does a laptop LCD work? You are probably confused by its very name. A liquid crystal? We were indoctrinated even as young kids that solid and liquid are two totally different things. So how can a solid crystal be named liquid?

Just so you know liquid crystals are actually similar to that of a liquid state, making it extra sensitive to mood rings and temperature. This should explain why your laptop LCD seems to act weird during cold weathers.

A pixel of the laptop LCD actually consists of molecules that are aligned between two electrodes that are transparent, axes of polarity that are perpendicular to each other and two polarizing filters. The liquid crystal of laptop LCD prevents the light from passing through the filters that would otherwise block the electrodes. The liquid crystals align and cause the electrode's surfaces that are in contact with the liquid crystal material to position the crystal molecules toward a particular direction. This is done by rubbing a thin layer of polymer in all directions, usually using a piece of cloth.

The alignment of the laptop LCD surfaces basically determines the orientation of the liquid crystal molecules, at least before the electric field is applied. In a liquid crystal, the two molecules are arranged in a helical structure or sometimes in a twisted manner. Liquid crystal materials are birefringent. This property makes the light passing through one filter that has a polarizing component to rotate as it passes through the liquid crystal layer. This then allows the light to pass through another polarized filter. Though half of the light is absorbed by the polarizing filter that comes first, the assembly is actually transparent.

If you apply a voltage that is large enough, the liquid crystal molecules of a laptop LCD become totally untwisted. This then causes the incident light to pass directly through the liquid crystal layer. With the right voltage, light should be able to pass through in an amount enough to the pixel.

One thing you should avoid though-the electric field for a particular polarity to last too long a time. You don't want this to degrade the performance of your laptop LCD. You can avoid this through the use of alternating currents, or you can reverse your electric field's polarity altogether.

You may already be aware of the importance of the pixel count of your laptop LCD. But one thing you should know is that a large pixel count of laptop LCD requires a large amount of electrodes as well. Each pixel, after all, requires one independent electrode. To address the problem, you must keep the device multiplexed. That is, the electrodes must be grouped on one side, or wired together. Each group should also get its own voltage.

All the things mentioned about laptop LCD may seem to be a bunch of gibberish for you. Don't get intimated. You don't have to bother yourself with such details. One thing you should educate yourself with is troubleshooting. There are actually components in your laptop LCD that is expected to have a short life span. A proper diagnosis should help you avoid unnecessary laptop LCD replacements.

How To Replace Laptop |