LED display product introduction for LED display

March 30, 2022

As a high-tech product, LED display has attracted people's attention. The intelligent full-color display that integrates light and electricity with computer control has been applied in a wide range of fields. The pixel points adopt LED light-emitting diodes, and a plurality of light-emitting diodes are arranged in a dot matrix manner to form a LED array, thereby forming a led screen. Different effects can be obtained by different LED driving methods. Therefore, the advantages and disadvantages of the LED driver chip play an important role in the display quality of the LED display. The led driver chip can be divided into a general-purpose chip and a dedicated chip.

General-purpose chips are generally used in low-end products of led displays, such as single and dual-color screens in indoors. The most commonly used general-purpose chip is the 74hc595, which has an 8-bit latch, a serial-to-parallel shift register, and a three-state output function. Each channel can output a maximum of 35ma non-constant current.

Since LED is a current-characteristic device, that is, under the premise of saturation conduction, its brightness changes with the change of current, and does not change with the voltage across it. The biggest feature of the special chip is to provide constant current source output, ensure stable driving of led, and eliminate the flicker phenomenon of led. It has the characteristics of large output current and constant current, and is suitable for occasions requiring high current and high image quality, such as outdoor full color screen and indoor full color screen.

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