Sonytek Display Co., Limited

The Difference Between Serial LCD and Parallel LCD

Time：2023-11-24

1. Display Color

The performance of the upper microcontroller determines the choice of parallel port LCD, 8-bit microcontroller, suitable for use 256 color display, 16 and 32-bit microcontroller can only reach 65K colors.

Serial LCD display color has nothing to do with the upper microcontroller, generally 65K colors.

2. Write Point Speed

LCD display is composed of each pixel, serial LCD and parallel LCD above the construction determines the speed of operation of these pixels. Parallel LCD write speed is determined by the speed of the upper microcontroller, the faster the upper microcontroller speed, the shorter the write time.

Serial LCD's speed has nothing to do with the upper microcontroller, mainly related to the baud rate of the serial port.

3. Application Scenarios

Serial LCD is suitable for colorful interface and complex display text, the upper computer performance is not high products.

Parallel port LCD is suitable for simple interface, real-time data acquisition display, high-speed drawing products.

4. System Structure

Serial port LCD mainly includes serial communicator, Flash controller, LCD controller, SDRAM controller, bus controller, etc. It accepts commands from the host computer through the serial port and executes the corresponding display operation after translation. The image and word bank are saved in Flash in advance and called directly.

Parallel port LCD screen is mainly composed of LCD controller, SDRAM controller, parallel port controller, etc. The agreed data sent to the parallel port is temporarily stored and displayed under the control of the clock, that is, what information is sent to me to display what content.

5. Cost Price

The price of parallel-port LCD screen is cheaper than the serial LCD screen.

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