Method for detecting departure of touch screen object from touch screen

A detection method and touch screen technology, applied in measuring devices, instruments, electrical digital data processing, etc., can solve problems such as misidentification, undetectable object distance from the screen, and achieve the effect of avoiding misidentification and realizing the pen suspension gesture function

CN109612398AActive Publication Date: 2019-04-12HUZHOU ZAAG ELECTRIC TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-04-12

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Abstract

The invention discloses a method for detecting a departure of a touch screen object from a touch screen. The method comprises: step S1: obtaining signals received by each receiving lamp from each optical path, and detecting an unobstructed cross sectional area of the optical paths through the received signals; step S2, obtaining the shape of each optical path and the shape of the touch object, andestablishing a model whose cross section is obstructed by the shape of the optical path and the shape of the touch object; and the unobstructed cross sectional area, the shape of each optical path, the shape of the touch object, the height value of the touch object from the screen is associated by the model; and step 3, obtaining a height value in the model by an unobstructed cross sectional areaand the established model, wherein the height value is the height of the touch object from the screen. According to the method for detecting the departure of the touch screen object from the touch screen, the distance of the touch screen object from the touch screen can be obtained relatively accurately, so that the misidentification of some touch operations can be avoided.
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Description

technical field

[0001] The invention belongs to the technical field of touch screens, and relates to a method for detecting a touch screen object leaving the screen. Background technique

[0002] The light is emitted from the emitting lamp to the receiving lamp. We call the path that this beam of light passes through as the light path. If the shape of the emitting lamp and the receiving lamp is a circular colloid, then the shape of this light path is a cylinder. If the emitting lamp and If the shape of the receiving lamp is elliptical, then the shape of this light path is a cylinder with an elliptical cross-section, and the other shapes are the same.

[0003] A conventional touch screen based on light path detection (also called grating) is covered with light paths in various directions on the screen surface. The relative positional relationship between these light paths is adjacent, intersecting, or partially overlapping. Neighboring, etc., usually to detect whether there ...

Examples

Embodiment Construction

[0052] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0053] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0054] The description in this part is only for several typical embodiments, and the present invention is not limited to the scope of the description of the embodiments. The mutual replacement of the same or similar prior art means and some technical features in the embodiments is also within the scope of the description and protection of the present invention.

[0055] The present invention discloses a touch screen object off-screen detection method, figure 1 It is a flow chart of a touch...