Apple is bound to introduce a fingerprint scanner on iPhone instead of using the usual home button. A new patent argued that Apple intends to give up the home button. The patent was bought by Apple from a display company named LuxVue back in 2014. The license provides details about the system of using LEDs positioned underneath the screen to trigger the detection of finger position and scan the surface to read the fingerprint.
In the new patent, Apple stated that when the finger is placed on the transparent surface, the IR diodes within the panel of the screen sense IR light which is reflected off notches of the surface of the fingerprint. The patterned IR light relays on the output processor using it as a bitmap. There, the light is processed to establish the unique pattern of the fingerprint.
Due to the fact that the display panel can sense the IR light, the screen panel performs surface profile assessment whenever the display panel does not emit visible light. The LuxVue Technology is prone to use small LEDs located under the display to repeat the ability to trace the presence of a finger against the glass of a screen.
Several mobile devices are equipped with capacitive touchscreen layers which are able to detect any change that occurs in capacitance every time a finger touches the screen. This revolutionary technology is implemented in fingerprint sensors and many other devices. However, it received a lot of drawbacks, especially when needed to be used in cold weather. Then, these fingerprint scanners do not work as expected when a person tries to use the device when wearing a glove.
If you use gloves with a conductive surface, you may be successful in using the device. The patent reveals the array of LED sensors which are located under the display to reiterate the functions of a fingerprint scanner and a traditional capacitive touchscreen. Apple officials claimed that the ability to trace the surface profile of an object while the screen panel is not transmitting visible light tends to determine the display panel to track the fingerprint of the user to unlock the device even if the display panel seems to be off.
Thus, the display panel does not need to emit visible light to track an object’s surface profile. Moreover, the screen panel will not request for a special sensor to trace the object’s surface profile.
Image source: flickr