What is the Difference between LCD & LED Monitor?

Couple of years ago, giant monitor manufacturers declared that CRT (Cathode Ray Tube) monitors will no longer be available in the market as it consumes heavy power produces low quality output and most importantly better technology is available I mean LCD Display.  

CRT Monitor was the only one choice of customer for a long time. Then LCD overthrows it from the market. But LCD's time was too little. Within a very short time another technology that is LED has arrived and the time of LCD is almost finished now. 

Many people are often confused with the two terms - LCD and LED. As they look same, both are thin and smart so many people can't make a difference between the two. In this post I wanna clarity the difference between the two. 

LCD Vs. LED Monitor: Basic Difference

LCD (Liquid Crystal Display)

LED (Light Emitting Diode) 

LCD and LED monitors are based on the same basic technology for image display, but differ in case of back-lighting technology used. While LCD monitors use cold cathode fluorescent lamps for backlighting, LED monitors use light emitting diodes. This is the prime difference between the two display technologies. 

So, to be honest, LED monitor is the improved version of LCD. 

LCD displays have to rely on external lighting, as their display is created through manipulation of light, passing through polarized liquid crystals. The back-lighting affects picture quality substantially and light shed by LEDs offers superior picture quality, compared to LCDs.

This is because LEDs offer much more gradation in intensity and a larger light wavelength spectrum, giving a truer color quality. These types of monitors offer a better dynamic contrast ratio too. So if you compare LED vs. LCD monitor for gaming and other intensive graphic applications, LED monitor is surely better choice, as they provide vivid and more natural colors, with better gradation.

One of the basic problems of LCD is that it can't display true black color. But LED can produce true black color by entirely switching off LED.

LED is somewhat slimmer than LCD.


LCD Vs. LED Monitor: Power Consumption

LED is a very recent as well as latest technology. They are preferred over LCD Monitors due to its overall high quality and less power consumption. It consumes much less power than LCD to operate. 

LED monitors consumes as much as 40% less power than conventional LCD monitors. 

LCD Vs. LED Monitor: Durability

LED Monitors are Eco-friendly as mercury is not used in their production. Since LED produces less power output over time, so they are more durable than LCD monitors. 

LED Vs. LCD Monitor: Cost

This is the one and only factor that holds back LED Technology. I mean the LED monitors are little bit costlier in compared to the LCD monitors. The difference is also not so high. However, the cost gap is lowering gradually with time as the demand for the LED is increasing. 

Note: Most of the today's laptop producers use LED display. And almost all laptops' screen are now built with LED technology! 

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Clean Up your PC to Avoid Overheating Problem

It's just about two days ago. I had been working on my PC for one and half hour. Suddenly the system got shut down without showing any error message! Immediately after 10 or 15 seconds I tried to power on the system. Power signal appeared but lasted for only 3 seconds. Then I pushed the switch again but same thing happened. I decided to wait for few minutes. At the third attempt I was able to turn on the system. 

After turning on the system, I ran an application named Speccy, a program that shows detailed information about computer, to check the system temperature. Oh my Goodness, I was really surprised seeing the result. My room is not air conditioned and its temperature may be under 30 degree Celsius. But the system temperature was as below:

Processor               :   82⁰ to 85⁰
Motherboard       :   75⁰  to 80⁰
Hard Disk             :   50⁰ and Above 

So, what happened actually? What's the reason. Was it caused by the room temperature? No, not at all. Because only 30⁰ temperature is nothing for a PC. Actually the problem was dust. Yes, I haven't open the PC case for more than a year. And I didn't clean it up for a long time. CPU Fan, Motherboard and all other parts of the system unit was under dust! 

So I opened the case and cleaned it up properly. After cleaning up the system the temperature was as below:

Processor               :   55⁰ to 60⁰
Motherboard       :   55⁰  to 58⁰
Hard Disk             :   45⁰ to 50⁰

This looks quite normal. Isn't it? 

It's been more than a year when I wrote a post about Computer Maintenance: Extend Your PC Life. Of course it applies only for Desktop PC. 

Many beginner level PC users report that- My PC gets restarted after running for a few hours. One of the prime reasons for this problem is Overheating. Sometimes it might be caused by virus. In other cases if your Windows is not genuine, then it may be restarted automatically by Windows itself. 

Now, I would like to discuss how to clean up the system unit of a desktop PC. Open the PC case. Observe the internal condition of the system- Amount of Dust. If you have a machine to clean dust use it carefully. Otherwise clean it using a soft cloth or any other cleaning materials. Make sure the piece of cloth is not wet. 

Gently clean the Motherboard, RAM, CPU Fan, Hard Disk Surface etc. Remove the CPU fan if possible. Then clean it properly with a brush. Unplug and plug the internal connectors with care. You should clean your PC in that way 2 times a year. 

Precautions:

While cleaning the system, keep in find the following issues:

• Never rub the surface of the Motherboard with pressure. Because it consists of numerous connections that look like zigzag lines. 

• Make sure the tissue or cloth you're using is not wet.

• The cloth should be as soft as possible.

• Unplug and plug the internal connectors properly. Never blend any pin. 

• While rubbing by the side of a capacitor, make sure you're not pressuring it. If any of the capacitors breaks down then you get a lot works to do . . . ! 

Whatever you do, do it with care. If you are not capable enough, then take help from expert.

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Get System Information by Simple CMD Command: Systeminfo !!

There are many ways to view your system information. But each of these ways has some advantages and disadvantages. You can't get information about all issues from a system. As a result you should know different ways to view your PC information. In this site two posts have already been published about viewing system information. 

1. DirectX Diagnostic Tool: Press Start + R > Type dxdiag > Press Enter > Get Details of your system. 
2. Speccy: A third party tool to view system information. It shows both hardware and software information. Also great for measuring the system temperature. 

Another popular way to get the system information is System Properties. You can get this by clicking right to the My Computer Icon and then choose Properties. Keyboard shortcut to view System Properties is Start + Pause. But it shows only minimum information. Just Processor, RAM and System type (32 or 64 bit). 

If you would like to get details about your system you must use either Dxdiag or Speccy. But today I'm gonna share something else with you! Yes, you can do it by a simple command. Let's start- 

1. Press Start + R to open Run.
2. Type cmd to run Command Prompt.
3. Type systeminfo hit enter and wait for 2/3 seconds
4. Now you get the details!

Systeminfo will show the following information:

• OS Name, Version, Manufacturer, Configuration and Build Type

• Name of the Registered Owner and Organization

• Product ID

• Windows Installation Date

• System Boot Time

• System Manufacturer, System Model and System Type

• Processor and its Capacity

• BIOS Name with Version

• Windows Installation Directory

• System Language and Keyboard Input Method

• Time Zone (Selected GMT Time Zone)

• Total Physical Memory/ RAM

• Virtual Memory: Maximum, Available, In Use

• Others: Page File Location, Domain, Logon Server, Hotfix, Network Card etc.

Have a look at the image below to get a clear idea

Actually, a single way to do something is not enough for a person. Every system has some exclusive advantages. So you need to know all possible ways to do any task. That's why I've presented this command to you even after there are 3 other ways to view system information. 

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