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发明授权
CN105679149B 驱动电磁式盲文显示装置显示盲文字符的集成电路 有权

驱动电磁式盲文显示装置显示盲文字符的集成电路
摘要：
本发明公开了一种驱动电磁式盲文显示装置显示盲文字符的集成电路。5V‑3.3V电压转换模块，经USB线与PC机相连，VCC 3.3V脚与LCD液晶接口、SD卡接口和主控制器的VCC 3.3V脚相连，VCC 5V脚与LCD液晶接口和120‑通道多路分路电路的VCC 5V脚相连；SD卡接口与主控制器相连，主控制器一路经接口与LCD液晶相连，另一路经120‑通道多路分路电路和ULN2803放大电路与电磁式盲文显示装置相连；电压转换模块对LCD液晶模块、SD卡模块、主控制器和120‑通道多路分路电路供电，开关电源对ULN2803放大电路供电。该电路能满足驱动和控制盲文触点和对LCD液晶屏幕的显示。
摘要（英）：

The invention discloses an integrated circuit for driving an electromagnetic type Braille display device to display Braille characters. The integrated circuit comprises a 5V-3.3V voltage conversion module, wherein the 5V-3.3V voltage conversion module is connected with a PC through a USB cable, an OUT pin is connected with an LCD interface, an SD card interface and a VCC 3.3V pin of a main controller, and a VCC 5V pin is connected with the LCD interface and a VCC 5V pin of a 120-channel multi-path shunting circuit; the SD card interface is connected with the main controller, one path of the main controller is connected with an LCD through the LCD interface, and another path is connected with the electromagnetic type Braille display device through the 120-channel multi-path shunting circuit and a ULN2803 amplification circuit; and the voltage conversion module supplies power to an LCD module, an SD card module, the main controller and the 120-channel multi-path shunting circuit, and a switching power supply supplies power to the ULN2803 amplification circuit. The integrated circuit can meet the requirements for driving and controlling Braille contacts as well as displaying an LCD screen.

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