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How’s LCD Works?

Ever wondered how the LCD of your laptop/ macbook works?

Most of the people when visit our site are usually aware of what an LCD panel is but most of them do not have the know-how of how it basically works. If you use a laptop it is important that you know how each component works so if any problem arises you know what to do and whom to contact. Let us give a brief insight into the working of an LCD panel of laptops and how it operates.

LCD stands for Liquid Crystal Display. You may be wondering what liquid crystal is. Well it is not a solid or a liquid specifically rather its nature depends on external factors like temperature. So it can both be solid at one time or liquid at another depending on temperature. The discovery of liquid crystal was made in 1888 by Fredreich Rheinizer who was an Austrian botanist. Due to this dual nature of liquid crystal our laptops may misbehave in extreme hot or cold weather.
We know that candles can regain their solid state when they cool down after being heated. Scientists in the 60s performed various experiments on liquid crystals and found out that if they apply varying degrees of electric voltages on the liquid crystals, they can change the properties of light that passes through them.

This experiment was further enhanced by a British researcher who succeeded in creating Biphenyl, a secure working liquid crystal material.

The LCDs that are produced for laptops today have a layered structure resembling a sandwich. Here we will introduce the concept of pixel before moving forward with our explanation. Every image has a resolution which is made up of tiny colored dots known as pixels. For example, a WXGA laptop screen has 1280×1024 pixels that make up the display of the screen. The higher the pixels, the better the resolution of the display and hence better the picture quality. This concept is known as matrix and the technology used in laptops LCD is known as “Active Matrix”.

Now we will get back to the structure of the LCD. As mentioned earlier, the LCD display is made up of different layers each layer pressed closely together to form a thin panel which is basically the LCD screen. The image below shows the layered structure of LCD panel.

laptop screen repair sydney

Now we will highlight the differences of different types of LCD screens that are used in laptops.

1. Touch vs non touch
There is no significant difference between touch and non touch LCD display on laptops. Both are almost similar in functioning except for the fact that there is an additional layer of touch glass in a touch screen display which is attached separately. So if your touch screen laptop is broken then either the LCD screen is damaged or the touch glass digitizer is damaged. Not both.

2. PC vs MacBook
Macbook display screen is entirely different from a PC display screen and they are only replicable if the entire top half is replaced with a new. Hence MacBook LCD screen repair is costly than a PC LCD screen repair.

3. Different quality and Different Priced Screens
There are many after-markets LCD available in the market that are very inexpensive. But one should be aware of them because these LCDs have many faults and are not durable and reliable at all. So look out for dead pixels, many color patches, and color consistency as they are all indicators of an after-market LCD. Moreover an original LCD costs from $110 to $200 so if you are getting an LCD screen for your laptop that costs lower than this rate then it means that you are getting after-market version of the LCD. So watch out!

If you encounter dim backlight or different colored display on your laptop, you must call the reliable laptop screen repair technicians to help you to fix the laptop. Sometimes, the prices that they offered is much cheaper if compared to the official store.

About the Author

iresqiResQ as the best mobile phone and computer repair service in Sydney area provide wide variety of repair service in mobile phone and computer industry, from Phone repair including iPhone repair and phone screen repair, PC and Laptop repair in Sydney. Contact iResQ Now Best iPhone Repairs in Sydney View all posts by iresq