Display system and control method for display device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorAtsushi Hirai
Life of this patent
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Abstract
In a display system, a display device includes a plurality of gate lines, a plurality of source lines, and a plurality of common electrodes used for both image display and touch detection. A control device controls the display device. The control device includes a drive circuit that generates a gate signal as a sine wave, and outputs the gate signal to the plurality of gate lines.
Claims13
A display system, comprising:
- a display device comprising a plurality of gate lines and a plurality of common electrodes, the display device used for both image display and touch detection;
- and
- a control device that controls the display device, the control device including a drive circuit that generates a gate signal as at least a sine wave, and outputs the gate signal to the plurality of gate lines, wherein
- when a specific frequency at which harmonics need to be restrained and a frequency of the gate signal satisfy a changing condition, the drive circuit generates the gate signal as the sine wave, and
- when the specific frequency and the frequency of the gate signal do not satisfy the changing condition, the drive circuit generates the gate signal as a square wave.
A control device for controlling a display device, the display device including a plurality of gate lines and a plurality of common electrodes, the display device used for both image display and touch detection, the control device comprising:
- a drive circuit that generates a gate signal as at least a sine wave, wherein
- the control device outputs the gate signal to the plurality of gate lines,
- when a specific frequency at which harmonics need to be restrained and a frequency of the gate signal satisfy a changing condition, the drive circuit generates the gate signal as the sine wave, and,
- when the specific frequency and the frequency of the gate signal do not satisfy the changing condition, the drive circuit generates the gate signal as a square wave.
A control method for a display device, the display device including a plurality of gate lines and a plurality of common electrodes, the display device used for both image display and touch detection, the control method comprising:
- generating a gate signal as at least a sine wave;
- and
- outputting the gate signal generated in the generating to the plurality of gate lines, wherein
- when a specific frequency at which harmonics need to be restrained and a frequency of the gate signal satisfy a changing condition, the generating generates the gate signal as the sine wave, and,
- when the specific frequency and the frequency of the gate signal do not satisfy the changing condition, the generating generates the gate signal as a square wave.
Dependencies are inferred from the claim text.