Actions that involve calibration include adjusting the touch screen so that the device correctly executes certain commands by touching the sensor with your fingers. Of course, the device may well work without this procedure, but the owner should prepare for the fact that he will have to observe all sorts of failures when working with the sensor. Next, we will consider in detail the main points that are associated with calibration and the methods that allow this procedure to be carried out.

Why calibration is necessary and what it can fix

Calibrating the screen of an Android device is most often necessary after a phone has been dropped or other mechanical damage has occurred. It is also necessary if the display had liquid contact- this, as a rule, violates the susceptibility of the electrodes, despite the fact that most gadgets are equipped with capacitive screens. They have replaced resistive ones, and are more reliable and more sensitive.

For what reasons debugging required:

• the sensor does not correctly recognize commands. In this case, for example, a tap works fine, but a pinch or a swipe can work periodically;
• The touchscreen doesn't always work. Actions may not be recognized and devices may ignore them;
• incorrect definition of commands. In this case, you can specify the letter "A", and "B" will be displayed instead;
• the waiting time for a response to an action being performed has increased significantly;
• Some graphics applications may experience interruption in selection of certain areas of the image or lines being drawn.

Consider when such problems occur:

• phone is used in for a long time. This is the main reason why the sensitivity of the sensor decreases, it is associated with physical factors. Also, this in detail directly depends on what quality the touchscreen is installed. However, it is important to note the fact that such failures can occur due to prolonged inactivity;
• sensor initially configured incorrectly. To avoid problems, we strongly recommend debugging immediately after purchasing the phone. Also, after replacing the elements of the touchscreen, calibration is required;
• viral activity and changing system settings. In some cases, incorrect operation is caused by virus activity or the user accidentally set the sensitivity settings in the phone settings (some gadgets provide this function);
• mechanical damage screen. Scuffs, scratches, improper application of a protective film, drops and a broken display significantly reduce the sensitivity of the sensor. Screen contamination also applies to this item.

Calibration using Android

You can debug using the standard tools of the Android operating system:

Optimization using the engineering menu

The engineering menu is a hidden section for flexible configuration and optimization of the smartphone, in order to use it you need to:

Specialized Applications

power bubble

Free app for screen calibration of android device. Distinctive features of Power Bubble is an intuitive interface, easy navigation, work on tablets and phones.

Instruction:

Important! On some devices, the program may be unstable or not respond to commands at all.

TouchScreenTune

A free program that allows you to optimize the sensitivity of your smartphone screen. It also adjusts the sensitivity of the handwriting sensor on some devices, such as the Samsung Galaxy Tab 10.1 and Asus Transformer. It should be noted that in order to use need superuser rights. Among other things, TouchScreenTune will help you set the settings for ignoring touches. The only disadvantage of the program is that there is no Russian-language interface and there are failures during use.

Clinometer

A free application for Android that allows you to calibrate the accelerometer. Also Clinometer can up to several degrees determine the angle to the surface.

Instruction:

Touchscreen Calibration

A free Android application that allows you to calibrate and adjust the sensor, debug sensitivity and response time.

Instruction:

Quick TuneUp

Free application for sensor calibration on android devices. With Quick TuneUp, you can also optimize your smartphone's battery and built-in memory.

Instruction:

Display calibration

A small utility that allows you to optimize and adjust the sensitivity of the sensor. Display calibration has an intuitive interface and a set of settings on display debugging.

Instruction:

Calibration via computer

If the sensor does not respond to commands or failures occur after calibration, then in this case it will be necessary to perform optimization via a computer. To do this, we need to install the program - MSP RemoteAlignment.

Utility features:

• calibration without installing software on the phone;
• saving the procedure log on the computer;
• debugging the touchscreen and saving the log with the results.

After the software has been installed, we proceed to the process itself:

• run the program and a window will appear on the screen, where several tabs will be presented;
• then connect the phone to the computer using USB;
• if you need to perform automatic debugging, press the "Skip" button, and to carry out all actions manually " Alignment»;
• after the process is completed, you can save the log by clicking the " Retrive».

How to check the touchscreen for performance

After the calibration, you need to make sure that the touchscreen is working, you can do this as follows:

• go to the Play Market and download the Screen Touch Test utility;
• install it on your device and run it;
• a field will appear on the main screen where you need to draw a rectangle right around the perimeter of the screen;
• when the sensor works correctly, the line will be smooth and clear, without breaks. If deviations are observed, the line is interrupted, various kinds of dots appear, this indicates that the touchscreen is unstable.

A similar function is available in the standard settings of Android.

Checking and adjusting the sensitivity

Additionally, you can use special features and independently adjust the sensitivity of the sensor:

How to Calibrate the Screen on an iPhone

On iPhone, you cannot perform the usual calibration that is done on Android. There are no special programs for this, and there is no advanced functionality in the settings. Therefore, one can only auto brightness sensor optimization. You can do this in the following way:

• open "Settings";
• we are looking for a room where the light is the dimmest;
• in the list of options, select the tab " Display and brightness»;
• deactivate the option " Automatic brightness»;
• a slider will appear with which you need to adjust the brightness of the screen, reduce the parameter to the very minimum;
• then reactivate the parameter " Automatic brightness” and the display becomes much brighter. The sensor will correct this option and move the slider to the optimal position.

Proximity sensor calibration

Proximity sensor - is a proximity sensor. This is a small device that reacts to the physical proximity of the smartphone to any object. It is thanks to him that the screen turns off during a telephone conversation.

Instruction:

Program for optimizing the sensor "Proximity sensor: Reset":

• downloading the program from the application store;
• press " Calibrate Sensor»;
• close the upper part of the device (the location of the sensor) with your hand and click "Next";
• remove your hand from the sensor and click "Next" again;
• then tap "Calibrate" and confirm the actions " Confirm". We reboot the device.

Possible Calibration Issues

Touchscreen optimization may not help in the following cases:

• in the first place is hardware failure phone. One of the options is damage to the screen with cracks that have arisen in the process. In this case, calibration will no longer help, you must contact the service center to replace the sensor;
• manufacturing defects. In some cases, we can talk about a factory marriage. The touch panel may not fit snugly against the glass, somewhere it comes close to it, somewhere not. In this case, spontaneous operation or lack of response is observed in some areas of the screen. Here you will also have to contact the service center.
• Incorrect repair. After replacing the touchscreen, the sensor may not work or work poorly. This also includes the mirror work of the touchscreen, when all actions and touches are mirrored on the display. It is not possible to determine the breakdown yourself here. It is better to take the device to the service center that carried out the repair. Usually in such cases the sensor is connected incorrectly.

Sometimes the calibration of the touchscreen or G-sensor sensor “flies” in the tablet. The device begins to incorrectly determine the position of pressing on the screen or orientation in space. Depending on what type of display is used in your device, you can judge whether the situation can be somehow corrected. Finding out which display is in your device is very easy - just read the instructions for it, or look at the manufacturer's website.

Resistive display sensors

Resistive touch screens were the first to appear, and were previously the most widely used. They are still used in some phones and tablets, as well as in the vast majority of car navigators. Now a little theory so that you have an idea what kind of resistive displays they are. Try not to fall asleep while reading.

The device of such a screen is very simple - two plates, solid glass or plastic and flexible plastic, covered with a conductive layer and separated by point microinsulators. When you press on a flexible plastic plate, it bends, and at a certain point on the screen, a short circuit occurs between the plates. The sensor controller measures the resistance of the plates up to this point and determines the coordinates of the pressure. This type of sensor has several drawbacks: low light transmission, fragility, the sensor responds to pressing, not to touch (therefore, you can control it with an ordinary stylus or any other fairly solid object, such as a match), the inability to determine several simultaneous clicks, and also due to due to the peculiarities of production, the parameters of the plates for each sensor may vary slightly, which causes inaccuracies in control.

To adjust the controller of such a sensor, calibration is required. Usually this function is located in the display settings, called sensor calibration or touch screen settings (it may be called differently, but the meaning is the same). Because I have a capacitive screen, I don't have those settings and can't take a screenshot.
After starting the calibration, the setup program will ask you to press several times at certain points on the screen and remember the settings. After that, the sensor readings will be corrected according to these settings, which will ensure an accurate determination of the place of pressing.

Capacitive sensors

There are two main types of such sensors: surface capacitive and projected capacitive. The first ones are quite simple: an alternating voltage is applied to the corners of the sensor's conductive plate, and the leakage currents caused by the introduction of an extraneous capacitance (for example, from a finger) are checked. According to the ratio of currents for each corner, you can set the touch point. These sensors do not respond to a regular stylus or a gloved hand. Such sensors are quite rare, do not support multiple simultaneous touches, and also require calibration. Calibration is carried out as for a resistive sensor.

Projection-capacitive sensors, the most common today, have a complex multilayer structure, consisting of a matrix of individual sensors combined into a rectangular structure. You can control multiple simultaneous touches (multi-touch). Such a sensor is sometimes performed directly on the screen glass, which reduces distortion (there is no air gap between the screen and the sensor). The controller is most often structurally integrated with the sensor itself, the parameters of which are known to it and do not require calibration. In many tablet models and rarely in phones, the controller is located on the main board of the device. Most often there are no problems with phones, but in tablets it happens that the same main board is used for screens of different diagonals, and the sensor parameters may vary.

Usually no configuration is required, but sometimes after firmware or software failures, the controller may need to be calibrated. This can be done through the engineering menu (you need to figure out how to get there specifically for your model) or using special programs, such as TouchScreen Tune (available on the Google Play Market). Sometimes the capacitive sensor may not work properly when charging due to the interference of a non-original charger. Nothing needs to be calibrated here - the charger flies into the garbage chute.

Accelerometer calibration (G-sensor)

This sensor, also called a gyro sensor or accelerometer, is used to determine the position of the device in space. G-sensor calculates the speeds and rotation angles of the device. The simplest use case is Android's "auto-rotate" feature and controlling games by tilting or turning your phone (tablet). Air mouse remotes also use this sensor. Calibration of the accelerometer is usually not required, many games and programs have the ability to adjust. Another thing is if, after the “curve” firmware, the accelerometer does not work at all or it is difficult to set it up normally. Here the engineering menu will help you, there you can test and calibrate the G-sensor, or install a normal firmware.

• To enter the engineering menu, hold down the volume down button and the power button at the same time, and wait until the menu appears.
• Using the volume up / down buttons, navigate through the menu and select the item test report, and in it - G-Sensor cali.
• Place the tablet on a flat surface and press Do Calibration (20%) until the numbers at the very top take the following form − +0.xxxx +0.xxxx +9.xxxx
• Calibration is completed, press the volume up 2 times, and then - Reboot.

A short video on calibrating the G sensor (accelerometer) using a Chinese tablet as an example

Outcome

In general, first find the reason why your display is behaving inappropriately. Do not rush to calibrate, first understand everything. You may be sharing your lunch with your tablet, leaving greasy marks or jam marks on the screen. Get rid of them carefully. It happens that a person accidentally touches the display with the finger of the hand that holds the tablet, and the sensor works. Just hold it differently.

Following the example of Pontius Pilate, I wash my fingers with which I typed this article and declare that all responsibility in the event of data loss or software failure lies entirely on your conscience.

Calibrating the Android screen, or rather the sensor, is a typical task, it can be done through the engineering menu. Actions that relate to the wording - android screen calibration include setting up a touch-type display in order to appropriately execute commands by the device by touching the sensor with a stylus or fingers. Without such a setting, the device will work, but there will be a number of undesirable consequences during the operation of the gadget.

Individual owners of devices on the Android operating system that are equipped with touch screens may sometimes encounter the undesirable problem of screen “disobedience”. In other words, when touching with a stylus or a finger at a certain point on the touchscreen, the gadget perceives it as a completely different command.

Or there are situations when the sensor executes commands only after the third or fourth attempt. As a rule, the cause of these problems is the incorrect operation of the screen itself, for which it is necessary to calibrate the touchscreen of the device.

Urgent and correct calibration of the touchscreen on Android may be required in almost all cases, if the smartphone fell from any height, and after the device accidentally enters the aquatic environment, this procedure is mandatory.

Also, sensor calibration on android will be required after repair work on replacing the screen, the appearance of a water spot under the glass of the screen, and after suffering other, at first glance, minor damage.

To check the need for this procedure, you must perform the following steps:

1. Remove the special film protecting the screen (to ensure the most correct operation of the sensor);
2. Enter any letter or number;
3. If there is a discrepancy between the button pressed on the gadget screen and the information entered, setting the touchscreen is necessary.

Basic Calibration Methods

Two methods are used to bring the sensor-sensor knocked down from its normal position into conformity.

These main methods include:

• Using special programs for the android system;
• Self-correction.

It should be noted that for many brands (Samsung, HTC, Nokia and other Android devices), the calibration steps are practically the same and identical.

Android device manufacturers typically use two types of sensor:

• Resistive (all sorts of problems very often arise with a screen made using this technology, so the setting is more in demand here, but such screens are practically not used today - these systems can only be seen in budget or outdated models);
• Capacitive (used in most gadgets, is more reliable and of high quality).

Touchscreen calibration using android

In the absence of access to the Google Play assortment, the display of an android device can be configured in another way without any special problems.

The step-by-step instruction in this case may look like this:

1. Go to the gadget in the "Settings" menu;
2. Select the item “Phone settings;
3. Find the inscription “Calibration, press the button;
4. A cross-target will appear on the screen, which has a dot inside;
5. Click on the center of the appeared target at least three times.

After the actions taken, the device will automatically memorize the touches. Thus, the calibration will be considered completed. After completing the setup procedure, it is necessary to check the operation of the touchscreen by the result of pressing a certain character on the screen, which should appear after its introduction.

Android screen calibration apps

You can configure the sensor using special software. In free and free access on the Internet, there is the necessary software in order to successfully carry out this process.

The software is fairly easy to install and operate. But the most important thing is that practically from the use of any of them you can get a positive and effective result. In the Google Play Store, you can find free apps like Bubble and many more.

Appendix
The most popular screen calibration app for Android. Just a few taps on the smartphone screen and the screen is calibrated - you only need to restart the phone and enjoy the precise operation of the device's touchpad.

Appendix
This program has an excellent interface, also has some additional special features. Application advantages:

• Bubble is free software;
• Works great with tablets and smartphones;
• Advertising is disabled in the settings, or it can be left to encourage developers;
• Excellent graphics;
• The presence in the application of a special display that displays the angle of inclination with the highest accuracy in fractions of a degree;
• Ease of use;
• The ability to fix the angle with a gesture or a click;
• The presence of a sound signal at the zero position of the angle;
• If necessary, the ability to lock the screen orientation (horizontal or vertical);
• Ability to reinstall the application on the SD card;
• Disabling, if necessary, the "sleep" mode during the operation of the program;
• Using full screen mode.

Using the program is completely easy. To do this, after the initial launch, select the type of device screen orientation in the settings (or set the “Auto” mode) and calibrate by level.
For this purpose, the phone is installed horizontally and the calibration button located on the left of the screen is pressed for a short time. On the touchscreen should appear - "Calidbration", and then - "Wait". The application will be ready for operation when the zero degree value is viewed on the screen.

The application is a program that allows you to adjust the screen settings of a touch device, while increasing its sensitivity and efficiency. Advantages:

• When using a protective film on the touchscreen, this application can significantly improve the sensitivity of the sensor;
• The slowing down effect from the use of a protective film is eliminated;
• When using such a device as a stylus, a kind of gadget tuning becomes simply necessary with the help of this program. Using this application, you can turn on the complete ignoring of even a touch from the palm of your hand (after setting, the hand can rest on the screen when using the stylus);
• If you need to use different settings, you can create separate shortcuts for quick launch of the application;
• The application has a free version.

The program is a professional tool for fine-tuning the level in the iPhone or iPod Touch. The application is used for solving common tasks or in more complex applications where the tilt of the device needs to be measured quite accurately. Advantages:

• The possibility of full-screen mode, which allows you to switch by clicking on the lower and upper arrows located in the middle of the gadget screen;
• Advanced two-way calibration, allowing adjustments to be made on surfaces that are far from flat. Any direction is calibrated separately in order to obtain the required accuracy;
• Possibility of free download;

Possible Calibration Issues

In the event that, nevertheless, the device is not calibrated in the way chosen for this purpose, or the application used does not give the necessary positive changes, then experts recommend trying another program, since there are quite a lot of them, the software in this direction is very diverse. You can also try "Hard reboot" or in other words reboot the device.

The last option for calibration can be considered an appeal to a service center. A similar problem with the screen of the device may be not only in incorrect settings, but also in more serious reasons. In particular, in the hardware failure of the device elements or the presence of a factory defect. In this case, it is better to contact a specialist to fix the problem.

It should also be noted that, together with screen calibration, the gadget may need to check and adjust the screen sensitivity parameters for its subsequent high-quality work.

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