# US 10,312,909 B2 · Input device and input operation method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,909 B2 - Document ID: US10312909B2 - Status: Granted - Kind: B2 - Application number: 15/544,026 - Filed: 2015-12-06 - Published: 2018-01-04 - Granted: 2019-06-04 - Earliest claimed: 2015-01-19 - Assignees: Shenzhen Lichi Creative Technology Ltd - Applicants: Shenzhen Lichi Creative Technology Ltd - Inventors: Jianan Huang; Kan Li - Web page: https://patentgrep.com/patent/US10312909B2 ## CPC - G06F 3/0447: {Position sensing using the local deformation of sensor cells} - G06F 3/0202: {Constructional details or processes of manufacture of the input device} - G06F 3/03: Arrangements for converting the position or the displacement of a member into a coded form - H03K 17/962: {Capacitive touch switches} - H03K 17/967: having a plurality of control members, e.g. keyboard (H03K17/969, H03K17/972, H03K17/98 take precedence) - H03K 17/975: using a capacitive movable element - H03K 17/98: having a plurality of control members, e.g. keyboard - H03K 2217/9653: with illumination - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract An input device, comprising an input interface, an adjustable capacitor, a memory and a processor, wherein the input interface is abutted with the adjustable capacitors; the memory is electrically connected with the adjustable capacitor and the processor, respectively, the input interface is used for generating pressing signals after being physically pressed so as to change the capacitance of the adjustable capacitor, the adjustable capacitor is used for correspondingly responding to the pressing signals of the input interface and outputting the capacitance changing signals, the memory is used for receiving the capacitance changing signals of the adjustable capacitor and finding corresponding output signals from the look-up table pre-stored in the memory; and the processor is used for receiving the output signals of the memory and feeding back the first input signal or the second input signal. ## Claims ### Claim 1 An input device, comprising an input interface, an adjustable capacitor, a memory and a processor, wherein the input interface is abutted with the adjustable capacitor; the memory is electrically connected with the adjustable capacitor and the processor, respectively; the input interface is used for generating pressing signals by being physically pressed so as to change the capacitance of the adjustable capacitor; the adjustable capacitor is used for correspondingly responding to the pressing signals of the input interface and outputting capacitance changing signals; the memory is used for receiving the capacitance changing signals of the adjustable capacitor and finding corresponding output signals from a look-up table pre-stored in the memory; and the processor is used for receiving the output signals of the memory and feeding back a first input signal or a second input signal, wherein, the adjustable capacitor comprises a frame, a first capacitor plate and a second capacitor plate, wherein, one end of the first capacitor plate and one end of the second capacitor plate are respectively fixed at the frame, and the other end of the first capacitor plate and the other end of the second capacitor plate are respectively arranged in a manner of extending away from the frame; wherein the adjustable capacitor further comprises a lead column; the lead column comprises a bulge; the first capacitor plate is fixedly arranged with respect to the lead column; the second capacitor plate comprises abutting ends abutted with the bulge of the lead column; the second capacitor plate is clamped between the first capacitor plate and the lead column; the frame contains the lead column; and the lead column performs a reciprocating motion with respect to the frame. ### Claim 2 (depends on 1) The input device according to claim 1, wherein the first capacitor plate and the second capacitor plate are oppositely arranged in a coupling manner and at intervals, and the pressing signals result in a change of the distance between the first capacitor plate and the second capacitor plate, and further results in a change of the capacitance of the adjustable capacitor. ### Claim 3 (depends on 1) The input device according to claim 1, wherein each abutting end of the second capacitor plate is arranged at the middle part of the second capacitor plate and extends towards the lead column. ### Claim 4 (depends on 3) The input device according to claim 3, wherein the adjustable capacitor further comprises an elastic body sleeved at the outside of the lead column and clamped between the lead column and the frame. ### Claim 5 (depends on 4) The input device according to claim 4, wherein the elastic body is a stainless steel spring. ### Claim 6 (depends on 1) The input device according to claim 1, wherein the input device further comprises a backlight unit electrically connected with the processor; the backlight unit performs color development based on the first input signal or the second input signal fed back by the processor. ### Claim 7 (depends on 1) The input device according to claim 1, wherein the processor is also electrically connected with an external output end; and the external output end outputs based on the first input signal or the second input signal fed back by the processor. ### Claim 8 (depends on 1) The input device according to claim 1, wherein the first capacitor plate and the second capacitor plate are disposed laterally with respect to the direction of the reciprocating motion of the lead column. ### Claim 9 An input device, comprising an input interface, an adjustable capacitor, a memory and a processor, wherein the input interface is abutted with the adjustable capacitor; the memory is electrically connected with the adjustable capacitor and the processor, respectively; the input interface is used for generating pressing signals by being physically pressed so as to change the capacitance of the adjustable capacitor; the adjustable capacitor is used for correspondingly responding to the pressing signals of the input interface and outputting capacitance changing signals; the memory is used for receiving the capacitance changing signals of the adjustable capacitor and finding corresponding output signals from a look-up table pre-stored in the memory; and the processor is used for receiving the output signals of the memory and feeding back a first input signal or a second input signal, wherein, the adjustable capacitor comprises a frame, a first capacitor plate and a second capacitor plate, wherein, one end of the first capacitor plate and one end of the second capacitor plate are respectively fixed at the frame, and the other end of the first capacitor plate and the other end of the second capacitor plate are respectively arranged in a manner of extending away from the frame; wherein the first capacitor plate and the second capacitor plate are oppositely arranged in a coupling manner and at intervals, and the pressing signals result in a change of the distance between the first capacitor plate and the second capacitor plate, and further results in a change of the capacitance of the adjustable capacitor; wherein the adjustable capacitor further comprises a lead column; the lead column comprises a bulge; the first capacitor plate comprises abutting ends abutted with the bulge of the lead column; the second capacitor plate is clamped between the first capacitor plate and the lead column and is fixedly arranged with respect to the lead column; the frame contains the lead column; and the lead column performs a reciprocating motion with respect to the frame. ### Claim 10 (depends on 9) The input device according to claim 9, wherein each abutting end of the first capacitor plate extends from an end part of the first capacitor plate to the lead column and penetrates the second capacitor plate. ### Claim 11 (depends on 9) The input device according to claim 9, wherein the first capacitor plate is provided with two symmetrically arranged abutting ends; the abutting ends extend from a middle part of the first capacitor plate to the lead column and penetrate the second capacitor plate. ### Claim 12 An input device, comprising an input interface, an adjustable capacitor, a memory and a processor, wherein the input interface is abutted with the adjustable capacitor; the memory is electrically connected with the adjustable capacitor and the processor, respectively; the input interface is used for generating pressing signals by being physically pressed so as to change the capacitance of the adjustable capacitor; the adjustable capacitor is used for correspondingly responding to the pressing signals of the input interface and outputting capacitance changing signals; the memory is used for receiving the capacitance changing signals of the adjustable capacitor and finding corresponding output signals from a look-up table pre-stored in the memory; and the processor is used for receiving the output signals of the memory and feeding back a first input signal or a second input signal, wherein, the adjustable capacitor comprises a frame, a first capacitor plate and a second capacitor plate, wherein, one end of the first capacitor plate and one end of the second capacitor plate are respectively fixed at the frame, and the other end of the first capacitor plate and the other end of the second capacitor plate are respectively arranged in a manner of extending away from the frame; wherein the first capacitor plate and the second capacitor plate are oppositely arranged in a coupling manner and at intervals, and the pressing signals result in a change of the direct-facing area between the first capacitor plate and the second capacitor plate, and further results in a change of the capacitance of the adjustable capacitor; wherein the adjustable capacitor further comprises a lead column; the frame comprises a lead tube; the lead column is partially inserted into the lead tube; the lead column performs a reciprocating motion with respect to the frame; the first capacitor plate comprises a main body part and an elastic body; the main body part and the second capacitor plate are oppositely arranged at the outside of the lead tube at intervals; the elastic body is sleeved at the outsides of both the lead column and the lead tube; and the upper end of the elastic body is abutted with the lead column, and the lower end of the elastic body is fixedly connected with the main body part. ### Claim 13 (depends on 12) The input device according to claim 12, wherein the first capacitor plate and the second capacitor plate are shaped into hollow cylinders which are disposed concentrically with respect to the direction of the reciprocating motion of the lead column. ### Claim 14 An input operation method of an input device, wherein the input device comprises an input interface, an adjustable capacitor, a memory and a processor; the input interface is abutted with the adjustable capacitor; the memory is electrically connected with the adjustable capacitor and the processor, respectively; the adjustable capacitor comprises a frame, a first capacitor plate and a second capacitor plate; one end of the first capacitor plate and one end of the second capacitor plate are respectively fixed at the frame, and the other end of the first capacitor plate and the other end of the second capacitor plate are respectively arranged in a manner of extending away from the frame; wherein the adjustable capacitor further comprises a lead column; the lead column comprises a bulge; the first capacitor plate is fixedly arranged with respect to the lead column; the second capacitor plate comprises abutting ends abutted with the bulge of the lead column; the second capacitor plate is clamped between the first capacitor plate and the lead column; the frame contains the lead column; and the lead column performs a reciprocating motion with respect to the frame; and the input operation method comprises the steps of: generating pressing signals by physically pressing the input interface so as to change the capacitance of the adjustable capacitor; correspondingly responding to the pressing signals of the input interface and outputting capacitance changing signals by the adjustable capacitor; receiving the capacitance changing signals of the adjustable capacitor and finding corresponding output signals from a look-up table pre-stored in the memory by the memory; and receiving the output signals of the memory and feeding back a first input signal or a second input signal by the processor.