A method and electronic device for outputting a touch signal
A technology of touch signal and electronic equipment, applied in the electronic field, can solve problems such as unresponsiveness, screen jumping, and touch function cannot be used normally.
Active Publication Date: 2022-02-25
HUAWEI TECH CO LTD
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Problems solved by technology
combine figure 1 , the signal strength of the TP signal remains unchanged in the uncharged and charged states. Among them, there is no charging noise interference in the uncharged state. The TP signal can normally identify various operations of the user and give a correct response. In the charged state, The charging noise is coupled to the TP signal, which may be recognized as user operation and cause problems such as automatic touch and wrong contact when the user actually operates. Response, the screen jumps and freezes
like figure 2 As shown, when there is a large charging noise, the TP signal will be "submerged" in the charging noise, resulting in the failure of the touch function
[0006] With the layout of electronic devices becoming more compact and the size of chips further reduced, touch screens and fingerprint readers are more sensitive to external interference, so the problem of charging interference with touch screens and fingerprints is more serious
Method used
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[0060] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the specification and appended claims of the present invention, the singular expressions "a", "an", "said", "above" and "the" are intended to include the plural expressions as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" that may be used in the present invention refers to and includes any or all possible combinations of one or more of the associated listed items.
[0061] The electronic equipment mentioned in the embodiment of the present invention is a touch device (that is, a capacitive touch device) using projected capacitive technology, and the electronic equipment can be a mobile phone, a mobile phone, a tablet computer (Tablet Personal Computer), a laptop Laptop Computer, digital camera, digital video camera, projection equ...
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The present invention provides a variety of methods and electronic equipment for outputting touch signals. is the first touch signal; when the electronic device is charging and the charging current is greater than the first current threshold, the touch signal output by the touch device is the second touch signal. When the electronic device is not charging, it outputs a touch signal. During charging, the electronic device appropriately increases the touch signal output by the touch device according to the charging current, thereby effectively reducing the impact of charging noise on the touch signal. Interference, while avoiding excessive battery drain when not charging.
Description
[0001] This application claims the priority of the Chinese patent application with the application number 201710147628.8 and the invention title "Method and Terminal for Reducing Charging Noise Interference" filed with the China Patent Office on March 13, 2017, the entire contents of which are incorporated by reference in this application middle. technical field [0002] The invention relates to the field of electronic technology, in particular to a method for outputting a touch signal and an electronic device. Background technique [0003] With the continuous development of communication technology, electronic devices, such as mobile phones and tablet computers, are becoming more and more popular in people's daily life. The electronic equipment has devices with various touch functions, which can provide human-computer interaction functions. Wherein, the touch control device may include a touch screen (English: Touch Panel, TP for short) capable of detecting a touch positio...
Claims
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IPC IPC(8): G06F3/041
CPCG06F3/041
Inventor 李创伟艾柯
Owner HUAWEI TECH CO LTD