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US 10,761,640 B2Granted
Display device
AssigneeJapan Display Inc.
InventorsYasuyuki Teranishi, Takafumi Suzuki, Michita Kudo
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a display device includes first electrodes overlapping a display area, a cover base covering the display area and a frame area, a second electrode arranged in the cover base and overlapping the frame area, a touch detection driver configured to output a drive signal to the second electrode, and a level shifter arranged between the second electrode and the touch detection driver, and configured to increase a signal level of the drive signal and output the drive signal having the increased signal level to the second electrode. The touch detection driver is configured to detect contact or proximity to an object with the frame area based on electrostatic capacitance between the first electrodes and the second electrode.
Claims14
A display device which displays an image in a display area based on a pixel signal, the display device comprising:
- a plurality of first electrodes overlapping the display area;
- a cover base covering the display area and a frame area outside the display area;
- a second electrode arranged in the cover base and overlapping the frame area;
- a touch detection driver configured to output a drive signal to the second electrode;
- a level shifter arranged between the second electrode and the touch detection driver, and configured to increase a signal level of the drive signal and output the drive signal having the increased signal level to the second electrode;
- and
- a plurality of third electrodes arranged in a location opposed to the first electrodes, wherein
- the touch detection driver is configured to:
- detect contact or proximity of an object with the frame area based on electrostatic capacitance between the first electrodes and the second electrode;
- and
- output a drive signal to the third electrodes, and detect contact or proximity of an object with the display area based on electrostatic capacitance between the first electrodes and the third electrodes,
- a first detection operation of detecting contact or proximity of the object based on mutual electrostatic capacitance between the first electrodes, and the second electrode and the third electrodes, and
- a second detection operation of detecting contact or proximity of the object based on self-electromagnetic capacitance of each of the second electrode for objection detection on the frame area and the third electrodes for objection detection on the display area, wherein the first detection operation and the second detection operation are switched by a switch.
10 more elements
A display device which displays an image in a display area based on a pixel signal, the display device comprising:
- a plurality of first electrodes overlapping the display area;
- a cover base covering the display area and a frame area outside the display area;
- a second electrode arranged in the cover base and overlapping the frame area;
- a touch detection driver configured to output a drive signal to the second electrode;
- a level shifter arranged between the second electrode and the touch detection driver, and configured to increase a signal level of the drive signal and output the drive signal having the increased signal level to the second electrode;
- a plurality of third electrodes arranged in a location opposed to the first electrodes;
- and
- a panel driver configured to drive a display panel including the third electrodes, wherein
- the touch detection driver is configured to:
- detect contact or proximity of an object with the frame area based on electrostatic capacitance between the first electrodes and the second electrode;
- and
- output a drive signal to the third electrodes, and detect contact or proximity of an object with the display area based on electrostatic capacitance between the first electrodes and the third electrodes,
- the panel driver is configured to increase a signal level of the drive signal output from the touch detection driver and output the drive signal having the increased signal level to the third electrodes, and
- the level shifter is configured to increase a signal level of the drive signal having the increased signal level even more and output the drive signal having the even more increased signal level to the second electrode.
11 more elements
A display device which displays an image in a display area based on a pixel signal, the display device comprising:
- a plurality of first electrodes overlapping the display area;
- a cover base covering the display area and a frame area outside the display area;
- a second electrode arranged in the cover base and overlapping the frame area;
- a touch detection driver configured to output a drive signal to the second electrode;
- a level shifter arranged between the second electrode and the touch detection driver, and configured to increase a signal level of the drive signal and output the drive signal having the increased signal level to the second electrode;
- a plurality of third electrodes arranged in a location opposed to the first electrodes;
- and
- a panel driver configured to drive a display panel including the third electrodes, wherein
- the touch detection driver is configured to:
- detect contact or proximity of an object with the frame area based on electrostatic capacitance between the first electrodes and the second electrode;
- output a drive signal to the third electrodes, and detect contact or proximity of an object with the display area based on electrostatic capacitance between the first electrodes and the third electrodes;
- and
- output a first drive signal to the second electrode and output a second drive signal different from the first drive signal to the third electrodes,
- the level shifter is configured to increase a signal level of the first drive signal and output the first drive signal having the increased signal level to the second electrode,
- the panel driver is configured to increase a signal level of the second drive signal and output the second drive signal having the increased signal level to the third electrodes, and
- the signal level of the first signal supplied to the second electrode is higher than the signal level of the second drive signal supplied to the third electrodes.
13 more elements
Dependencies are inferred from the claim text.