INPUT DEVICE

• US 20150193053A1
• Filed: 03/17/2015
• Published: 07/09/2015
• Est. Priority Date: 03/04/2013
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: TAKAGI, Kazushige, INOUE, Manabu, KOSUGI, Naoki, NAKAYAMA, Takahito, TOKAI, Akira, KASAHARA, Shigeo, KADO, Hiroyuki, INOUE, Shuji, AOYAMA, Toshiyuki
• Application Number:
  US14/660,522
• Publication Number:
  US 20150193053A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

An input device according to the present disclosure is an input device arranged in a display device that sequentially applies a scanning signal to a plurality of scanning signal lines in one frame period to perform update of display, the input device comprising driving electrodes in quantity of N provided corresponding to the plurality of scanning signal lines, and a plurality of sensing electrodes arranged so as to intersect with the driving electrodes in quantity of N to form capacitive elements at intersection portions. In a touch detection period, a driving signal is sequentially applied to the driving electrodes in quantity of N, and a touch detection is performed based on a detection signal output from each of the plurality of sensing electrodes.

Claims

1. An input device arranged in a display device that sequentially applies a scanning signal to a plurality of scanning signal lines in one frame period to perform update of display, the input device comprising:

driving electrodes in quantity of N provided corresponding to the plurality of scanning signal lines; and

a plurality of sensing electrodes arranged so as to intersect with the driving electrodes in quantity of N to form capacitive elements at intersection portions,

wherein in a touch detection period, a driving signal is sequentially applied to the driving electrodes in quantity of N, and a touch detection is performed based on a detection signal output from each of the plurality of sensing electrodes, and

the scanning signal is input to the scanning signal lines at a timing of Ts, then an input operation of the driving signal to the driving electrodes in quantity of N is configured such that the input of the driving signal starts from an Nx-th (a numerical value obtained by adding an integer of one or more to a first driving electrode) driving electrode at input timing Ty (a numerical value obtained by adding an integer of 0 or more to Ts), and one of the driving electrodes that does not correspond to the scanning signal lines to which the scanning signal is being input is selected to input the driving signal.

2. The input device according to claim 1, wherein the input operation of the driving signal for the touch detection includes interlaced scanning input sections in which the driving signal is input by interlacing in an array direction of the driving electrodes.

3. The input device according to claim 1, wherein the input operation of the driving signal for the touch detection includes sequential input sections in which the driving signal is sequentially input in an array direction of the driving electrodes, and interlaced scanning input sections in which the driving signal is input by interlacing in the array direction of the driving electrodes.

4. The input device according to claim 1, wherein the input operation of the driving signal for the touch detection is configured such that the driving electrodes in quantity of N are divided into a plurality of blocks, and in each one of the blocks, a block of the driving electrodes that do not correspond to the scanning signal line to which the scanning signal is being input is selected to input the driving signal.

5. The input device according to claim 1, wherein a relationship between touch detection time t1 when the driving signal is input to the driving electrodes and display update time t2 when the scanning signal is input to the scanning signal lines is t1<

t2.

6. The input device according to claim 1, wherein the touch detection period is provided in a display update period in a horizontal scanning period of the display device.