Touch screen object off-screen detection method

A detection method and touch screen technology, applied in measuring devices, instruments, calculations, etc., can solve problems such as misidentification, undetectable object distance from the screen, etc., to avoid misidentification, realize the function of pen suspension gestures, and solve the problem of continuous pens Effect

CN109612398BActive Publication Date: 2021-10-08HUZHOU ZAAG ELECTRIC TECH
10 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-10-08

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention discloses a method for detecting off-screen objects on a touch screen, comprising: step S1, acquiring signals received by each receiving light from each optical path, and detecting the unblocked cross-sectional area of ​​the optical path through the received signal; step S2, acquiring the shape of each optical path and the shape of the touching object, build a model with the occluded section through the shape of the optical path and the shape of the touching object; the model combines the unoccluded cross-sectional area, the shape of each optical path, the shape of the touching object, and the height value of the touching object from the screen Correlation; step S3, obtain the height value in the model through the unoccluded cross-sectional area and the established model, and the height value is the height of the touch object from the screen. The off-screen detection method of the touch screen object proposed by the present invention can obtain the distance between the touch screen object and the touch screen more accurately, and avoid misidentification of some touch operations.
Need to check novelty before this filing date? Find Prior Art

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

[0051] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0052] 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.

[0053] 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.

[0054] The present invention discloses a touch screen object off-screen detection method, figure 1 It is a flow chart of a touch...