What is Segment LCD? Where is it Used?
What is Segment LCD? Where is it Used?
Segment LCD screens are the simplest, cheapest and lowest power-consuming display solution in the electronics world.
From smart watch to water meter, this technology is still used in billions of devices.Segment LCD FeaturesThe logic of Segment LCD is very simple: Specific segments turn on and off to create numbers and letters.7 Segment: Shows only 0-9 digits. Most common. (Ex: microwave oven screen)14/16 Segment: Can show both digits and letters (A-Z).Monochrome Structure: Generally black-white, no color. Therefore power consumption is almost zero.Very Low Energy: While a TFT screen draws 50-100mA, a Segment LCD draws 1-5uA. Works for years in a battery-powered device.Advantages - Why Still Used?Price: While a TFT LCD is 3-5 dollars, Segment LCD starts from 0.3 dollars.Long Life: Works without problem up to 50,000 hours, no burn-in.Readability Under Sun: While TFT screen stays dim in sun, Segment LCD is clearly visible.Simple Driving: No need for extra processor, driven directly with microcontroller.Usage AreasSegment LCD is used everywhere graphics are not required:Meters: Electricity, water, natural gas metersThermostat and Combi Boilers: Only showing temperature is enoughDigital Clocks and CalculatorsMedical Devices: Blood pressure device, glucose measurement deviceIndustrial Panels: Voltage, current, pressure indicatorIf you will only show numerical data in your project, spending money on TFT or OLED is completely unnecessary cost.When to Choose Segment LCD vs TFT LCD?If you need graphics, color, menu → TFT LCD
If you need only numbers, low power, long life → Segment LCDConclusion
If you are designing a battery-powered, long-lasting product that will only show data, the right choice is 100% Segment LCD.
For 7 segment and custom segment LCD solutions: https://www.karinaelektronik.com/
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