ELECTRONIC APPARATUS AND METHOD OF CONTROLLING THE SAME

• US 20140292682A1
• Filed: 02/21/2014
• Published: 10/02/2014
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: KIDA, Yoshitoshi, Azumi, Kohei, Hayashi, Makoto, Mizuhashi, Hiroshi, Yamada, Jouji, Nakagawa, Hirofumi, Yamamoto, Michio, Ikeno, Kozo
• Granted Patent: US 9,576,549 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/041661 using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• 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
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092

Abstract

According to one embodiment, an electronic apparatus, includes a sensor-equipped display device includes a display device and a sensor configured to detect a contact or proximate position, a display driver configured to output an image display signal to the display device and to output a drive signal to the sensor, a detecting circuit configured to generate, based on the information from the sensor, raw data (Raw data) including three-dimensional information of coordinates of a position on the display device and a physical quantity at the coordinates, and an application processor configured to discriminate whether a part of the region in the display area should be further sensed or not, based on the raw data, and if the part of the region is further sensed, to output the range of the display device to be further sensed and the timing of driving the sensor to the display driver.

Claims

1. An electronic apparatus, comprising:

a sensor-equipped display device comprising a display device and a sensor configured to output information to detect a contact or proximate position on the display device;

a display driver configured to output an image display signal to the display device and to output a drive signal to the sensor;

a detecting circuit configured to output a range on the display device sensed by the sensor and timing of driving the sensor to the display driver, and to generate, based on the information from the sensor, raw data (Raw data) including three-dimensional information of coordinates of a position on the display device and a physical quantity at the coordinates; and

an application processor configured to output graphic data to be displayed on the display device based on the raw data generated by the detecting circuit, to the display driver, to discriminate whether a part of the region in the display area should be further sensed or not, based on the raw data generated by the detecting circuit, and if the part of the region is further sensed, to output the range of the display device to be further sensed and the timing of driving the sensor to the display driver.

2. The apparatus according to claim 1, wherein

the sensor-equipped display device comprises a plurality of first electrodes arrayed in a matrix, a second electrode arranged to be opposite to the first electrode and comprising a plurality of electrodes extended in a first direction and aligned in a second direction intersecting the first direction, and a third electrode arranged to be opposite to the second electrode and comprising a plurality of electrodes extended in the second direction and aligned in the first direction,

the display driver outputs the image display signal to the first electrode, and applies a sensor drive signal or a common voltage to the second electrode,

the detecting circuit outputs a sensor drive timing signal and a scan line signal indicating number of drive lines and the plurality of electrodes of the second electrode to be driven, to the display driver, and

the information is a voltage value of the electrode, of the third electrode sampled by the detecting circuit.

3. The apparatus according to claim 2, wherein

the application processor comprises:

an image data generator configured to generate three-dimensional image data, based on the raw data; and

a partial scan region computing module configured to obtain a part of a region in the display area where sensing is executed, based on the three-dimensional image data generated by the image data generator.

4. The apparatus according to claim 3, wherein

the partial scan region computing module outputs data including the number of drive lines and the electrodes in the second electrode, to the detecting circuit.

5. The apparatus according to claim 3, wherein

if a peak value which does not exceed a threshold value for contact or proximity discrimination is present in the image data or if a peak value equal to or greater than the threshold value is present in the electrodes in number equal to or less than a predetermined number, of rows, and in number equal to or less than a predetermined number, of columns, the partial scan region computing module outputs a range including the peak values to the detecting circuit.

6. A method of controlling an electronic apparatus comprising a display device, a sensor configured to output information to detect a contact position on the display device, and a display driver configured to output a drive signal to the sensor, the method comprising:

obtaining raw data including three-dimensional information of coordinates of a position on the display device generated based on the information from the sensor, and a physical quantity at the coordinates;

generating three-dimensional image data based on the obtained raw data;

discriminating whether a part of the region in the display area should be further sensed or not, based on the generated image data; and

if the part of the region is further sensed, outputting the range of the display device to be further sensed and the timing of driving the sensor to the display driver.

7. The method according to claim 6, further comprising:

outputting graphic data to be displayed on the display device based on the obtained raw data, to the display driver.