What is LCD?
LCD stands for Liquid crystal display which is used to display information electronically like text, images, and pictures.
It consists of rod shape tiny molecules sandwiched between a piece of glass and an opaque substrate.
When the electric current pass through the solution then the crystal act as a shutter to allow or block the incident light to pass through it.
LCD is used in many applications like Television, Gaming devices, computer, etc.
Pin No | Pin Name | Description |
1 | Vss (Ground) | Ground pin connected to system ground |
2 | Vdd (+5 Volt) | Powers the LCD with +5V (4.7V – 5.3V) |
3 | VE (Contrast V) | Decides the contrast level of display. Grounded to get maximum contrast. |
4 | Register Select | Connected to Micro-controller to shift between command/data register |
5 | Read/Write | Used to read or write data. Normally grounded to write data to LCD |
6 | Enable | Connected to Microcontroller Pin and toggled between 1 and 0 for data acknowledgement |
7 | Data Pin 0 | Data pins 0 to 7 forms a 8-bit data line. They can be connected to Microcontroller to send 8-bit data.These LCD’s can also operate on 4-bit mode in such case Data pin 4,5,6 and 7 will be left free. |
8 | Data Pin 1 | |
9 | Data Pin 2 | |
10 | Data Pin 3 | |
11 | Data Pin 4 | |
12 | Data Pin 5 | |
13 | Data Pin 6 | |
14 | Data Pin 7 | |
15 | LED Positive | Back-light LED pin positive terminal |
16 | LED Negative | Backlight LED pin negative terminal |