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Field LCD is the LCD used for the display of calculators, electronic watches, digital multimeters, etc. The display type is similar to that of nixie tubes, and it relies on 7 fields to piece together the digital display. Generally, only 0~9, A~F16 characters can be displayed. This kind of LCD is simple to drive and consumes less power. It is widely used in occasions that only need to display numbers, and is also used to replace digital tubes in portable applications.
Different from character and graphic:
The segment type generally does not have a special controller, and the displayed things are relatively fixed. Generally, the displayed content is directly modeled. There is a dedicated multi-segment LCD drive control chip.
Character and graphic liquid crystals have a controller (to translate the control commands sent by the MCU). Different controllers have different commands. The specific liquid crystal structure also requires different controllers. Mainly dot matrix structure, scanning mode.
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