GMA46881C

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The GMA46881C is a dual-color dot matrix display module that features a wide range of applications. Developed by Grayhill Inc., the GMA46881C utilizes group driver/column line scanning technology to display red, green and orange symbols or patterns. The module consists of 256 single-color diode dot matrix arrays and gets positioned in 72 x 72 pixels configuration. This provides the display module with numerous applications that range from gaming machines, instruments to locations like shopping malls and casinos.

The GMA46881C’s functional capability allows it to be implemented into various applications. For example, the GMA46881C can be used to display colorful graphics on gaming machines to as an LED dot matrix, and also be used in bigger LED displays as an LED cluster, impacting the visual effect of large scale LED displays. This module also supports a wide viewing angle with good viewing performance, perfect for advertising applications like retail stores, supermarkets, and shopping malls.

To operate the GMA46881C, both power input and communications control signals need to be provided. The power input is 1.2V-3.3V or 5 V and the communications interface is SPI and 8-bit parallel usually. It needs to be noted that the input signals must have a stable pulse width and duty cycle for data transmission to ensure the correct display.

The working principle of GMA46881C is that it splits the single-color LED dot matrix into 8 sub-arrays each with 32 x 32 dots, which are connected with drivers (32 pcs) and 32 pcs column lines respectively. While driving the LEDs, the scan acceleration logic will store the data in columns in terms of timing control by calculating the scanned rows and the number of the column. After the frame data is built up, the data will be stored into the RAM until the scan command is done and written into the next frame.

The GMA46881C is a great option for places "where vivid colors are desired but space is limited”, this device has multi-color emitting diodes that greatly increased the flexibility of single-color dot matrix graphics. This module is commonly used on gaming machines due to its many features such as high brightness, wide viewing angle and fast response rate. The GMA46881C is an excellent choice for applications that require impressive visuals in areas with limited space, such as retail stores and shopping malls.

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