Optical touch device and sensing method thereof

Abstract

An optical touch device and a sensing method thereof are provided. The optical touch device includes a plurality of optical sensors and a processing unit. The optical sensors are arranged around a touch plane and are spaced from each other. The two adjacent optical sensors located at one side of the touch plane are defined as one set of an optical sensing module, such that the optical sensors are paired to form multiple sets of the optical sensing modules. The processing unit generates a plurality of touch coordinates data corresponding to the plurality sets of the optical sensing modules according to the optical touch data, and determines whether the touch coordinates data corresponding to each set of the optical sensing modules is in at least one touch-excluded area corresponding to each set of the optical sensing modules, and respectively excludes the touch coordinates data in the touch-excluded area.

Description

technical field [0001] The present invention relates to a touch sensing technology, and in particular to an optical touch sensing device with multiple sets of optical sensing modules and a sensing method thereof. Background technique [0002] Electronic devices or display screens with touch functions have gradually become the trend of today's technology. However, limited by manufacturing cost and touch effect, capacitive or resistive touch screens are only suitable for small and medium-sized devices, such as mobile phones, tablet computers, notebook computers, and AIO (All-In-One) computers. And it is difficult to apply to large-sized devices because of problems such as cost and reliability. With the development of photosensitive elements, large-sized screens (such as electronic whiteboards or advertising billboards) mostly use optical touch technology to realize touch function. Accuracy is also improved with the development of technology, coupled with the refinement of th...

AI Technical Summary

Problems solved by technology

However, when there are more touch devices, the detection and judgment of touch points will be more complicated, and the amount of calculation required will also increase.

On the other hand, a touch device composed of more than two optical sensing modules will also have areas where the sensing is relatively inaccurate, for example, when the position of the touch object is very close to the connection line between the two optical sensing modules , the intersection point sensed by the touch device is difficult to be accurate

Or, limited by the image resolution of the optical sensor module, the touch device cannot accurately identify and judge real touch points and ghost points that fall within certain excessive distances or certain angle ranges, so that in the event of misjudgment

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