Electronic device with an integrated touch sensing and force sensing device
First Claim
1. An electronic device, comprising:
- an integrated touch sensing device and force sensing device, comprising;
an input surface;
a force-sensitive layer attached to the input surface;
a first electrode layer attached to a first surface of the force-sensitive layer, the first electrode layer comprising a set of discrete electrodes; and
a second electrode layer attached to a second surface of the force-sensitive layer; and
an analog front end (AFE) processing channel operably connected to the integrated touch sensing device and force sensing device, the AFE processing channel configured to process a touch signal that is based on a change in an electrical property between the first and the second electrode layers and configured to process a force signal that is based on an electrical property generated by the force-sensitive layer, the AFE processing channel comprising;
a receiver AFE channel operably connected to at least one respective discrete electrode in the set of discrete electrodes;
a touch processing channel operably connected to an output of the receiver AFE channel; and
a force processing channel operably connected to the output of the receiver AFE channel.
1 Assignment
0 Petitions
Accused Products
Abstract
An integrated touch sensing and force sensing device is included in an electronic device. The integrated touch sensing and force sensing device includes a force-sensitive layer operably attached to an input surface, a first electrode layer attached to a first surface of the force-sensitive layer, and a second electrode layer attached to a second surface of the force-sensitive layer. An analog front end processing channel is operable to process a touch signal that is based on a change in an electrical property between the first and second electrode layers and operable to process a force signal that is based on an electrical property generated by the force-sensitive layer based on a force applied to the input surface.
86 Citations
25 Claims
-
1. An electronic device, comprising:
-
an integrated touch sensing device and force sensing device, comprising; an input surface; a force-sensitive layer attached to the input surface; a first electrode layer attached to a first surface of the force-sensitive layer, the first electrode layer comprising a set of discrete electrodes; and a second electrode layer attached to a second surface of the force-sensitive layer; and an analog front end (AFE) processing channel operably connected to the integrated touch sensing device and force sensing device, the AFE processing channel configured to process a touch signal that is based on a change in an electrical property between the first and the second electrode layers and configured to process a force signal that is based on an electrical property generated by the force-sensitive layer, the AFE processing channel comprising; a receiver AFE channel operably connected to at least one respective discrete electrode in the set of discrete electrodes; a touch processing channel operably connected to an output of the receiver AFE channel; and a force processing channel operably connected to the output of the receiver AFE channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An electronic device, comprising:
-
an integrated touch sensing device and force sensing device, comprising; a force-sensitive layer; a first electrode layer attached to a first surface of the force-sensitive layer, the first electrode layer comprising a set of discrete electrodes; and a second electrode layer attached to a second surface of the force-sensitive layer; and an analog front end (AFE) processing channel operably connected to the integrated touch sensing device and force sensing device, the analog AFE processing channel configured to process a touch signal received from the integrated touch sensing device and force sensing device and configured to process a force signal received from the integrated touch sensing device and force sensing device, the analog AFE processing channel comprising; a receiver AFE channel operably connected to at least one respective discrete electrode in the set of discrete electrodes, the receiver AFE channel comprising; an input of an amplifier operably connected to the at least one respective discrete electrode in the set of discrete electrodes; an analog-to-digital converter operably connected to an output of the amplifier; a feedback capacitor connected between the input of the amplifier and the output of the amplifier; and a servo/sigma delta analog-to-digital converter connected in parallel with the feedback capacitor, wherein the amplifier and the feedback capacitor process the touch signal and function as an integrator for the servo/sigma delta analog-to-digital converter; and a touch processing channel operably connected to an output of the receiver AFE channel. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
-
19. An electronic device, comprising:
-
an integrated touch sensing device and force sensing device, comprising; a force-sensitive layer; a first electrode layer attached to a first surface of the force-sensitive layer, the first electrode layer comprising a first set of discrete electrodes; and a second electrode layer attached to a second surface of the force-sensitive layer, the second electrode layer comprising a second set of discrete electrodes; a touch transmitter channel operably connected to at least one respective discrete electrode in the second set of discrete electrodes; and an analog front end (AFE) processing channel operably connected to the integrated touch sensing device and force sensing device, the AFE processing channel configured to process a touch signal that is received from the integrated touch sensing device and force sensing device and configured to process a force signal that is received from the integrated touch sensing device and force sensing device, the AFE processing channel comprising; a receiver AFE channel operably connected to at least one respective discrete electrode in the first set of discrete electrodes; and a touch processing channel operably connected to an output of the receiver AFE processing channel. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
Specification