How to rectify discrepancy in tactile input on Android screen because of water drop falling on the screen?
perhaps to recalibrate the screen of Micromax A75 "you can enter into engineering mode by dialing *#*#3646633#*#*"
look if there is something regarding screen???
Calibrate screen option is not in display settings
Phone on resuming did begin in testing mode ,
The screen calibration option not seen
Maybe option of phone lock was seen
Many devices offer the user the option for adjusting the sensitivity of the screen. If your device offers this option (usually under a settings command) try making the screen less sensitive. Your finger will provide the "stronger" touch or signal to the screen of your device than a drop of water.
Good luck! :)
You mean making screen resistive from capacitative
"resistive" and "capacitive" screens are fundamentally different, although related, technologies.
A resistive screen is so-named because of it requires pressure from the user to activate its touch screen.
A capacitive screen uses electric current, which we've been speaking about.
Richard is referring to a feature that I am unfortunately unfamiliar with. To my knowledge, touchscreen sensitivity is normally controlled at the driver level, although I'm certain some manufacturers have included a manual control for this. Most I would guess do not, unfortunately.
If you are really interested in the technical aspects of it, here is a detailed technical explanation on the basics of why waterproofing a capacitive touchscreen is important: http://www.eetimes.com/design/industrial-control/4374783/The-basics-of-waterproofing-capacitive-touchscreens
The capacitive screens used in most smartphones are conductive, and run a very small electrical charge through the screen. Whenever you touch the surface, a small charge runs through the moisture in your fingertips, triggering the touch response.
By that same logic, a drop of water should cause the screen to register a touch - a persistent touch, since water (with small ions in it) conducts electricity - and your device will most certainly malfunction.
To date, there is no fix for this. However, I noticed that on my phone, water doesn't cause this issue. I'm not sure why, since the technology behind its screen is capacitive.
You may find these links interesting:
Speaking of which, my Nook Touch, which uses an infrared sensor instead of a capacitive screen, is completely uneffected by water on its touch surface. It makes me wish that phone manufacturers would switch from the unreliable, drainy capacitive tech to something more reliable and battery efficient, like infrared sensor. I doubt such a phone will ever see the light of day. :-(
Can wiping it off restore the touch specificity , once dried? which was what is mentioned under Water Rejection in the link
Does the model Micromax A75 support Water Rejection?
How to rectify the malfunction if the discrepancy persists?
Oh yes, certainly, drying should fix the issue. I really like ha14's suggestion of running a screen recalibration. If that doesn't solve the issue, I am completely out of ideas. In theory, such an option should help compensate for ambient moisture, or moisture residue from your fingers.
ha14 has really amazing search skills!
Once you have dried the screen off, it should no longer register a persistent "ghost finger". However, even the smallest amount of moisture can cause the screen to malfunction. It's possible that resetting to stock
Saikat's link was quite useful. I learned some very interesting things about Water Rejection technology. Given what the article explained, the technology appears proprietary, and is likely patented by Motorola.
This was the only phone I could find that was marketed as "water resistant":
So it's doubtful that the Micromax has such an implementation. :-(
Hope that was of help. Good luck!
After wiping , if discrepancy persists , can it be fixed?
That is extremely troubling. It could be that moisture has perhaps gotten between the screen and the glass, although I'm not sure how that might impact the screen's behavior.
In this diagram, you can clearly see where water might become trapped, although it should dry over time. An issue with water contamination is that it can sometimes leave behind mineral residue, which can be conductive. I doubt this is the case.
Another possibility is that the screen has been physically damaged in some unseen way.
You may wish to attempt leaving the phone in rice. It should help dry out any internal components that have become dampened.
I have some other feedback, but I'll leave it below in response to some other comments.