Electronic device for efficiently performing data transmission and method for controlling the same

• US 9,746,949 B2
• Filed: 02/18/2014
• Issued: 08/29/2017
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Yamamoto, Michio, Yamada, Jouji, Nakagawa, Hirofumi, Azumi, Kohei, Hayashi, Makoto, Mizuhashi, Hiroshi, Ikeno, Kozo, Kida, Yoshitoshi
• Primary Examiner(s): Park, Sanghyuk
• Application Number:
  US14/182,432
• Publication Number:
  US 20140292677A1
• Time in Patent Office: 1,288 Days
• Field of Search: 345173
• 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 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• 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 includes 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 applying a sensor drive signal to the second electrodes, a detection circuit transmitting a detection data including physical quantity data detected 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 processing the detection data 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 plurality of electrode patterns of the second electrodes sequentially; and

a detection circuit configured to transmit a detection data including physical quantity data detected from the plurality of electrode patterns of the third electrodes at each time when the sensor drive signal is applied to the plurality of electrode patterns of the second electrodes, wherein

the detection circuit outputs an interruption request signal each time the detection circuit detects the physical quantity data from the plurality of electrode patterns of the third electrodes and transmits the detection data according to a response to the interruption request signal,

the detection data includes an identification value which identifies an electrode pattern and a frame period which are driven at a time of detection, and

the driven electrode pattern and the driven frame period are identified based on a horizontal period signal and a vertical period signal which the detection circuit receives from the display driver.

2. The electronic device of claim 1, wherein the detection circuit transmits an initial detection data in a single detection period with a start flag indicative that the transmitted data is an initially detected data.

3. The electronic device of claim 2, wherein the detection data contains 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 with each other and voltage value data associated with each of the positional coordinates.

4. The electronic device of claim 1, wherein the detection circuit transmits a previously detected detection data while detecting a new detection data from the plurality of electrode patterns of the third electrodes.

5. A control method of an electronic device comprising a display device including 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, the control method comprising:

applying, via a display driver, a sensor drive signal to the plurality of electrode patterns of the second electrodes sequentially;

detecting, via a detection circuit, physical quantity data from the plurality of electrode patterns of the third electrodes at each time when the sensor drive signal is applied to the plurality of electrode patterns of the second electrodes;

outputting, via the detection circuit, an interruption request signal each time the detection circuit detects the physical quantity data from the plurality of electrode patterns of the third electrodes; and

transmitting, via the detection circuit, the detection data according to a response to the interruption request signal, wherein

the detection data includes an identification value which identifies an electrode pattern and a frame period which are driven at a time of detection, and

the driven electrode pattern and the driven frame period are identified based on a horizontal period signal and a vertical period signal which the detection circuit receives from the display driver.

6. The control method of claim 5, further comprising transmitting an initial detection data in a single detection period with a start flag indicative that the transmitted data is an initially detected data.

7. The control method of claim 5, further comprising transmitting, via the detection circuit, a previously detected detection data while detecting a new detection data from the plurality of electrode patterns of the third electrodes.