Thanks capacitive touch screen, iPad can
detect all the right touch. But this can not perceive touch touch screen
intensity. According to reports, the U.S. Patent and Trademark Office approved
a new touch technology Apple patent application in 2012, this patent describes
a capacitive touch and a combination of infrared detector to accurately detect
the intensity of the user presses the screen technology. This technology allows
users without relying on complex physical hardware can accurately convey the
pressure on a touch surface, so that the user interface navigation and
interactive form to reach a new dimension.
According to the description of the patent
document, the bottom of the touch screen system deployed in one or more
infrared emitters, may touch the cover glass to the infrared light emitted at a
specific angle. These angles can be selected between the cover glass on top and
bottom surfaces and the surrounding air and the reflected light emitted by the
finger 100% reflection. When the light reflection cover glass to get inside, it
will trigger an infrared transmitter can calculate the total number of all reflections
receiver, the receiver is based on whether the reflected light from the
surrounding air or the user's finger to display different output readings.
Unlike other systems, Apple's patent does
not require precise transfer restrictions, as long as there are differences to
internal reflection. More important is the measurement of the attenuation can
be emitted from the surface of the glass used to determine whether the emitted
infrared rays are absorbed finger or air. In addition, Apple also mentioned the
use of a fourth color OLED layer output in the infrared wavelength, and the use
of ultrasound and other acoustic signal measurement FTIR.
Infrared method to determine the user
touches the screen, called the infrared spectrum. IR is essentially a
multi-touch optical detection method of detecting the finger touch screen
reflecting infrared. When combined capacitive touch, a touch can be measured
intensity. Infrared spectroscopy has been used to Microsoft's Perceptive Pixel
products. Microsoft provides several large screen using infrared spectroscopy
multi-touch sensing devices, and is called Microsoft Pixel Sense technology.
This technique is also used in the Samsung SUR40.
As Microsoft's technology, also used in the
red spectral camera to detect the pressure of light refraction, which allows
people to use a device, it is possible to identify the distinction between
objects and fingers.
While Apple has not yet implantable
pressure sensor technology in the touch screen mobile devices, but the company
in the past few years has been exploring various pressure detection technology.
Have developed a pressure sensor, a pressure sensing device shell. It is
unclear whether Apple will plan to the above IR technology in its future iOS
devices, but will increase the force sensing element allows Apple beyond
existing static gesture touch operation, upgrade to a whole new level of
interaction . According to the present situation, the possibility of the patent
is applied to the next generation iPhone6 is not large, so the majority of
users still need to be patient.
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