Touch screen adopting an optical module system using linear infrared emitters

Abstract

The present invention relates to a touch screen adopting an optical module system using linear infrared emitters, wherein linear infrared emitters are arranged on three or four sides of a rectangle constituting the touch screen, two or three optical modules are employed to sense the infrared light emitted from the linear infrared emitters, and the shadow generated by the touch of fingers is recognized to detect the location of the touch. The touch screen adopting an optical module system using linear infrared emitters according to the present invention comprises: linear infrared emitters (40) arranged independently on at least three sides (20b, 20c, 20d) of the four sides (20) of a rectangular screen (10) to emit infrared light; optical modules (30) arranged on at least two corners of the four corners of the rectangular screen (10) to monitor the whole of the screen (10) and sense the infrared light emitted from the linear infrared emitters (40); and a control board (50) which analyzes the infrared signal sensed through the optical modules (30) to detect the point on the screen touched by the user.

Description

technical field [0001] The invention relates to a touch screen in the form of an optical module, in particular to arranging linear infrared luminous bodies on three or four sides of a rectangular frame constituting the touch screen, and using two or three optical modules to detect linear infrared luminous bodies. The infrared light emitted by the illuminant can identify the shadow generated by the touch of the finger, thereby determining its position. A touch screen using an optical module of a linear infrared illuminant. Background technique [0002] A touch screen is a device capable of specifying a touch point in response to the touch when an image displayed on the screen is touched (contacted) with a finger, a stylus pen, or the like. [0003] Generally, a touch screen is manufactured as a structure overlaid on a flat display LCD panel or a PDP panel, and the touch screen is a device that specifically recognizes the touch position of a finger and converts it into coordin...

AI Technical Summary

Problems solved by technology

[0013] When using an optical fiber as an optical waveguide, although the radius of curvature can be reduced to a certain extent, it cannot be bent sharply at a right angle

When using this kind of fiber, high manufacturing cost is required, and the manufacturing process will become complicated

[0014] In this way, if an optical waveguide is used on a touch panel formed in a small and limited rectangular space, since the angular curvature radius of the optical waveguide needs to be set to be large, there is a problem that it is practically difficult to apply

[0015] In addition, although this existing technology can use two optical modules to identify a single touch point, it cannot identify multi-point touch, so the scope of application is limited

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