¼VGA: power consumption and available controllers
Our factory is looking for graphic LCD display for our prototype. I have read somewhere, that you are selling displays - and I have even found the type - 320x240STN with CFL-backlight (EA 7320-7,9NC), but I would like to get something technical information about it: I would like to know:
1.Power consumption (with and without backlight)
2.Power supply( voltage)
3.If it is equipped with contoller (if no - what type of controler it needs and have you got any ?)
4.Price of full kit or parts (I mean display, controler and backlight)
Thank you for your email response. Here are the answers for your questions. Please note that these datas are only valid for the EA 7320-7,9NC:
1. The Power Supply Current at VCC is max. 15mA, at VEE max. 10mA.
2. The logic voltage is 5V ±10% and the driving voltage for the contrast is -14..-21V (it depends on the temperature)
3. For driving the lcd you need a controller chip like SED 1330 or MSM 6255 and some driver, display memory and decoder. Then you have to write a software with graphic routines, fonts ... Furtherwards you need an CFL inverter for driving the CFL backlight (e.g. EA CXA-E005 DM 29,00 per pc.)
4. The price for the full featured RS232 KIT (EA KIT7320-V24) is DM 850,00 per pc. Here you will get 5 intergrated Fonts, various graphics functions and an RS232 interface. The power supply is simply 5V. You do not need a CFL inverter anymore.
There are some other 1/4 VGA lcds available: