How to Identify Screen Issues

So, you are having some screen issues with your cell phone and you have no idea what is happening or even how you can fix it. This blog post should help you get a nice foundation on helping you solve your problem. A cellphone screen has two different sections, which is called a Liquid Crystal Display and a Digitizer.

What is Liquid Crystal Display (LCD)?

First, it is important to know what a Liquid Crystal Display (LCD) is. It is normally made up of key sections, such as the diffusion panel, backlight and the LCD panel.

The first section, which is the diffusion panel redirects and scatter the light equally to make sure there is a constant display. The second section, which is the backlight, is created using fluorescent tubes. This the light source for the LCD. The last section is the LCD itself. The LCD panel has a few different parts. The first part is the two polarized glasses. These glasses surround the layer of liquid crystals and colour filters. The second section of the LCD is the Thin Film Transistor (TFT). The Thin Film Transistor tackles a specific pixel on the screen.

Samsung, LG Philips and Sharp produce LCD panels.

How does a Digitizer work?

 Second, it is important to know about different types of touch screens. A Digitizer has two different sections- Resistive screen and a Capacitive screen.

  1. Resistive

A perfect example of a resistive screen is common touch screens, such as banks. Banks often require an electronic signature with a small pointed pen. When you are signing, if you press hard enough, the screen will slightly bend. This is why it is called “resistive” because it “resists” to your touch. Resistive screens work by incorporating two electrical layers bending to touch each other.

  1. Capacitive

Capacitive screens works with electrical charges, such as the human finger. These screens are often used on cellphone devices. Capacitive touch screens are formed from copper or indium tin oxide.

There are two kinds of capacitive touch screens – surface and projective. Both use a tiny electrical charge when a finger touches the screen. Then the tiny electrical charge is transferred to the finger to finish the circuit.


Identify the issue with your cellphone screen

Are you able to see what is on the display?

YES- If you are able to see what is on the display but your touch is malfunctioning or your glass is cracked. If this is the case, you may be lucky enough to be able to replace just the glass and digitizer. For example, on many iPads if you crack the screen, you can replace the glass alone and not the LCD. Unfortunately, many phones (iPhone’s included) have a fused assembly with the LCD and digitizer/glass being one unit.

NO- You will need to replace LCD. Even if your phone may not be visibly cracked, it may still have a damaged LCD. A clear example of a damaged LCD is when you have a screen bleeding, which is a black spot on the display itself. Replacing the LCD is the only way to fix this.


We-Lectronics specializes in cell phone screen repair. We can repair all makes and models we can get parts for. We offer professional services at competitive pricings. Come see why customers drive from hours away to use our services today!


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