LCD Display Modules

1. What is the difference between LED and LCD?

Liquid crystals are used in both types of displays to help create images. The distinction is in the backlights. While fluorescent backlights are used in standard LCD monitors, light-emitting diodes are used in LED monitors.

2. Why is LCD important?

LCD is important because LCD screens do not use phosphors, they rarely suffer from image burn-in when a static image is displayed on a screen for an extended period of time; however, LCDs are susceptible to image persistence. The LCD screen uses less energy and can be disposed of more safely than a CRT screen. Because of its low electrical power consumption, it can be used in battery-powered electronic equipment more efficiently than a CRT.

3. Can I interface the LCD display with Arduino?

You can interface an LCD to Arduino, as it is compatible with Arduino boards, to get your desired LCD display output on the screen. You can also interface LCD display with Raspberry Pi and Node MCU.

4. What is an LCD display module?

An LCD display module is an electronic display module and has a wide range of applications. As mentioned earlier LCD display modules are most commonly 16*2 type of display module used in various devices and circuits. An LCD module works by using liquid crystals to produce an image. These liquid crystals are embedded into a display screen and are then illuminated using a backlight. The actual LCD display module is made of several layers including polarizing filters and electrodes. The backlight plays an important role in the LCD display module. Without this backlight, the LCD display module will not be able to produce any visible images. 

5. What is meant by LCD display?

A liquid crystal display is a flat panel display that uses liquid crystals for its primary display operation. The liquid crystal displays are super-thin technology display screens that are used in laptops, computer screens, cell phones, and portable video games.

6. How LCD works?

Millions of pixels make up a display. The number of pixels in a display is commonly used to describe its quality. A pixel is made up of three subpixels: red, blue, and green (commonly referred to as RGB). A different colour can be produced when the subpixels in a pixel change colour combinations. When all of the pixels on a display work together, it can produce millions of different colors. A picture is created when the pixels are rapidly switched on and off.

Each type of display controls pixels differently; CRT, LED, LCD, and newer types of displays all control pixels differently. In short, LCD displays are illuminated by a backlight, and pixels are turned on and off electronically while rotating polarized light using liquid crystals. A polarizing glass filter is placed in front and behind each pixel, with the front filter at a 90-degree angle. Between the two filters are liquid crystals that can be turned on and off electronically.

LCD displays can have a passive matrix or an active matrix display grid. A thin film transistor (TFT) display is another name for an active matrix LCD. The passive matrix LCD display is made up of a grid of conductors with pixels at each intersection. To control the light for any pixel, a current is sent across two conductors on the grid. An active matrix has a transistor at each pixel intersection, requiring less current to control a pixel's luminance. As a result, an active matrix display's current can be switched on and off more frequently, improving screen refresh time.

 LCD displays have good range of advantages like

 1. Low cost

 2. Comparatively lightweight

 3. LCD provides excellent brightness 

 4. It also has better wide viewing angles