Electronic device and method for controlling the same

• US 9,448,661 B2
• Filed: 02/21/2014
• Issued: 09/20/2016
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Azumi, Kohei, Yamada, Jouji, Nakagawa, Hirofumi, Yamamoto, Michio, Hayashi, Makoto, Mizuhashi, Hiroshi, Ikeno, Kozo, Kida, Yoshitoshi
• Primary Examiner(s): Olson, Jason
• Assistant Examiner(s): Neupane, Krishna
• Application Number:
  US14/186,216
• Publication Number:
  US 20140292681A1
• Time in Patent Office: 942 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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

According to one embodiment, an electronic device includes a display device having a plurality of first electrodes arranged in a matrix form, second electrodes including a plurality of electrode patterns extending in a first direction and aligned in a second direction to cross the first direction, and third electrodes including a plurality of electrode patterns extending in the second direction and aligned in the first direction, a display driver configured to apply a sensor drive signal to the second electrodes, a detection circuit configured to transmit a detection data group including physical quantity data detected in one detection period from the plurality of electrode patterns of the third electrodes at each time when the sensor drive signal is applied to the second electrodes, and an application processor configured to process the detection data group received from the detection circuit.

Claims

1. An electronic device comprising:

a display device comprising a plurality of first electrodes arranged in a matrix form, second electrodes opposite to the first electrodes, the second electrodes including a plurality of electrode patterns extending in a first direction and aligned in a second direction to cross the first direction, and third electrodes opposite to the second electrodes, the third electrodes including a plurality of electrode patterns extending in the second direction and aligned in the first direction;

a display driver configured to apply a sensor drive signal to the second electrodes repeatedly in one frame period;

a detection circuit connected to the third electrodes and configured to detect physical quantity data from at least one of the plurality of electrode patterns of the third electrodes at each time when the sensor drive signal is applied to the second electrodes, to store the physical quantity data sequentially, and to output a detection data group including all physical quantity data detected in the frame period when last physical quantity data in the frame period is detected; and

an application processor configured to process the detection data group received from the detection circuit, wherein

the detection circuit generates a dataset with the physical quantity data,

in addition to the physical quantity data, the dataset includes;

a sensor setting signal transmitted from the application processor, the sensor setting signal including a frequency and a number of pulses of the sensor drive signal;

information of the control by the display driver based on data received from the display driver; and

information including at least one of the electrode patterns to be driven and a frame period identified by the detection circuit based on a sensor horizontal period signal and a sensor vertical period signal from the display driver, and

the application processor processes the dataset.

2. The electronic device of claim 1, wherein the detection data group includes at least a plurality of positional coordinates indicative of positions at which the electrode patterns of the second electrodes and the electrode patterns of the third electrodes cross each other and an interelectrode capacitance value or an electrode voltage value output from the third electrode at each of the positional coordinates.

3. A control method of an electronic device including a display device comprising a plurality of first electrodes arranged in a matrix form, second electrodes opposite to the first electrodes, the second electrodes including a plurality of electrode patterns extending in a first direction and aligned in a second direction to cross the first direction, and third electrodes opposite to the second electrodes, the third electrodes including a plurality of electrode patterns extending in the second direction and aligned in the first direction;

a display driver configured to apply a sensor drive signal to the second electrodes repeatedly in one frame period;

a detection circuit connected to the third electrodes and configured to detect physical quantity data from at least one of the electrode patterns of the third electrodes at each time when the sensor drive signal is applied to the second electrodes, the control method comprising;

storing the physical quantity data detected at each time when the sensor drive signal is applied to the second electrodes sequentially; and

transmitting a detection data group including all physical quantity data detected in the frame period to an application processor when last physical quantity data in the frame period is detected, wherein

the detection circuit generates a dataset with the physical quantity data,

in addition to the physical quantity data, the dataset includes;

a sensor setting signal transmitted from the application processor, the sensor setting signal including a frequency and a number of pulses of the sensor drive signal;

information of the control by the display driver based on data received from the display driver; and

information including at least one of the electrode patterns to be driven and a frame period identified by the detection circuit based on a sensor horizontal period signal and a sensor vertical period signal from the display driver, and

the application processor processes the dataset.