Display device
First Claim
1. A display device comprising:
- a display panel having a plurality of pixels arranged in a matrix, and common electrodes divided into M blocks when M is an integral number of 2 or more (M≥
2);
a driver circuit applying a touch panel scanning voltage to the common electrodes; and
a detector circuit including an averaging filter,wherein the common electrodes of each of the M divided blocks are shared with the respective pixels,wherein the driver circuit sequentially applies the touch panel scanning voltage to the common electrodes of each of the M divided blocks, andwherein the detector circuit determines;
in a normal touch detection process, the touch event applying the touch panel scanning voltage to the common electrodes of each of the M divided blocks;
in a ghost touch process, a ghost touch unidentifiable event without reporting a touch position, and a ghost touch event reporting a ghost touch position when the averaging filter output a ghost touch data.
0 Assignments
0 Petitions
Accused Products
Abstract
An in-cell type liquid crystal display device includes a first unit that detects whether a touch is present, or not, on the basis of a current flowing in a plurality of detection electrodes when a touch panel scanning voltage is applied to counter electrodes of each of M (M≥2) divided blocks, and a second unit that detects noise on the basis of a current flowing in the plurality of detection electrodes, assuming that an (M+1)th counter electrode is present for the counter electrodes of each of the M divided blocks, and assuming that a touch panel scanning voltage synchronous with the touch panel scanning voltage applied to the counter electrodes of each of the M divided blocks is applied to the (M+1)th counter electrode.
-
Citations
11 Claims
-
1. A display device comprising:
-
a display panel having a plurality of pixels arranged in a matrix, and common electrodes divided into M blocks when M is an integral number of 2 or more (M≥
2);a driver circuit applying a touch panel scanning voltage to the common electrodes; and a detector circuit including an averaging filter, wherein the common electrodes of each of the M divided blocks are shared with the respective pixels, wherein the driver circuit sequentially applies the touch panel scanning voltage to the common electrodes of each of the M divided blocks, and wherein the detector circuit determines; in a normal touch detection process, the touch event applying the touch panel scanning voltage to the common electrodes of each of the M divided blocks; in a ghost touch process, a ghost touch unidentifiable event without reporting a touch position, and a ghost touch event reporting a ghost touch position when the averaging filter output a ghost touch data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A display device comprising:
-
a display panel having a plurality of pixels arranged in a matrix, and common electrodes divided into M blocks when M is an integral number of 2 or more (M_2); a driver circuit applying a touch panel scanning voltage to the common electrodes; and a detector circuit including an integrating circuit, an AD converter, and an averaging filter, wherein the common electrodes of each of the M divided blocks are shared with the respective pixels, wherein the driver circuit sequentially applies the touch panel scanning voltage to the common electrodes of each of the M divided blocks, wherein the integrating circuit includes a reference voltage input terminal and outputs an analog touch signal of the display panel, wherein the AD converter converts an output voltage of the integrating circuit into digital data, wherein the detector circuit determines; in a normal touch detection process, the touch event applying the touch panel scanning voltage to the common electrodes of each of the M divided blocks; in a ghost touch process, a ghost touch unidentifiable event without reporting a touch position, and a ghost touch event reporting a ghost touch position when the averaging filter output a ghost touch data, wherein the threshold value for determining the touch event of the normal touch detection process is different from that for determining the ghost touch event of the ghost touch detection process, wherein the detector circuit determines the touch event with a first operating point of the AD converter and the ghost touch event with a second operating point of the AD converter, and wherein the first operating point is digital data which is converted the reference voltage. - View Dependent Claims (9, 10, 11)
-
Specification