CFAG320240CX-TFH-T-TS low contrast


New member

recently I have purchased a 320x240 LCD (part number CFAG320240CX-TFH-T-TS) and I have noticed that the contrast is low. I have tried to correct it with the contrast potentiometer but without good results. There is a solution for this problem or is a limitation of the product.

Thank you for your help.

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CF Tech

Usually those modules look very good when properly adjusted.

The contrast circuit should have enough "range" to go from "too light" to "too dark", with some optimal adjustment between. Can you verify that your adjustment has enough range?

If so, the please let us know what voltage you see on Vo (Pin 3) when the contrast is at its best.


New member
Thank you very match for your reply.

When the contrast is adjusted in the optimal point, the voltage in Vo (Pin 3) is -18.35 volts.

Thank you again.