Display device and display system
AssigneeE Ink Holdings Inc.
InventorsTe-Lung Cheng, Yun-Nan Hsieh, Chia-Ming Hsieh, Chi-Mao Hung
Life of this patent
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Abstract
This disclosure relates to a display device including a display, a touch module, and a controlling circuit. The controlling circuit determines whether a noise interference phenomenon occurs on the touch module due to the display showing multiple frames. If the noise interference phenomenon occurs, the controlling circuit sets that an uplink signal or a downlink signal is generated by a first driving voltage. If no noise interference phenomenon occurs, the uplink signal or the downlink signal is generated by a second driving voltage, where the first driving voltage is greater than the second driving voltage.
Claims12
A display device comprising:
- a display;
- a touch module;
- and
- a controlling circuit, electrically connected to the display and the touch module, and configured to control the touch module to emit an uplink signal to an active pen which is configured to emit a downlink signal to the touch module,
- wherein the touch module is configured to detect a touch position, at least one portion of each of two consecutive frames of a plurality of frames shown by the display covers the touch position, and the controlling circuit is configured to determine whether a noise interference phenomenon occurs on the touch module due to the two consecutive frames in accordance with the at least one portion of each of the two consecutive frames,
- wherein if the noise interference phenomenon occurs, the controlling circuit is configured to set that the uplink signal or the downlink signal is generated by a first driving voltage,
- wherein if the noise interference phenomenon does not occur, the controlling circuit is configured to set that the uplink signal or the downlink signal is generated by a second driving voltage, wherein the first driving voltage is greater than the second driving voltage;
- wherein the controlling circuit is configured to perform a spatial-to-frequency transformation on the at least one portion of each of the two consecutive frames to obtain two feature vectors, and determine if a difference between the two feature vectors is greater than a threshold.
A display system comprising:
- an active pen;
- and
- a display device comprising:
- a display;
- a touch module;
- and
- a controlling circuit, electrically connected to the display and the touch module, and configured to control the touch module to emit an uplink signal to the active pen which is configured to emit a downlink signal to the touch module,
- wherein the touch module is configured to detect a touch position, at least one portion of each of two consecutive frames of a plurality of frames shown by the display covers the touch position, and the controlling circuit is configured to determine whether a noise interference phenomenon occurs on the touch module due to the two consecutive frames in accordance with the at least one portion of each of the two consecutive frames,
- wherein if the noise interference phenomenon occurs, the controlling circuit is configured to set that the uplink signal or the downlink signal is generated by a first driving voltage,
- wherein if the noise interference phenomenon does not occur, the controlling circuit is configured to set that the uplink signal or the downlink signal is generated by a second driving voltage, wherein the first driving voltage is greater than the second driving voltage;
- wherein the controlling circuit is configured to perform a spatial-to-frequency transformation on the at least one portion of each of the two consecutive frames to obtain two feature vectors, and determine if a difference between the two feature vectors is greater than a threshold.
Dependencies are inferred from the claim text.