News Column

Researchers Submit Patent Application, "Sensor Array and Method of Controlling Sensing Device and Related Electronic Device", for Approval

May 29, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventor Hsu, En-Feng (Hsin-Chu City, TW), filed on October 17, 2013, was made available online on May 15, 2014.

The patent's assignee is PixArt Imaging Inc.

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to video detection, and more particularly, to a method that is able to reduce power consumption of a gesture sensor, and a related electronic device and sensor array.

"A sensing device of recognizing gesture (i.e., gesture sensor) is widely used in a variety of applications, providing an innovative and instinctive way of interacting human with machine, which detects motion of a hand of a user and accordingly issues control commands to a user interface. Generally, the sensing device of recognizing the gesture includes components as shown in FIG. 1. An active light source 110 periodically illuminates the hand and a sensing device 120 periodically detects changes of lights and shadows generated by illumination on the hand. Computation circuit inside the sensing device 120 determines whether the motion of the hand matches specific gesture patterns and accordingly generates control commands. Operating frequencies of the active light source 110 and the sensing device 120 are illustrated in FIG. 2A. When the hand leaves from a sensing covering range V of the sensing system 100, the active light source 110 and the sensing device 120 stop periodically operating. Then, a standby mode is entered such that power consumption can be saved. In the meantime, the active light source temporarily stops illuminating the hand of the user. Also, the sensing device 120 temporarily stops sampling changes of lights and shadows. In order to re-activate the sensing system 100 when the hands enter the sensing covering range again, the active light source 110 and the sensing device 120 intermittently detect whether the hand enter the sensing covering range V again (at a operating frequency which is lower than a operating frequency of the normal operating state). Once there is no change found between the lights and the shadows, the sensing system 100 remains in the standby mode. Otherwise, the sensing system 100 comes back to the normal operating state, performing gesture recognition. Operating frequencies regarding the active light source 110 and the sensing device 120 is illustrated in FIG. 2B.

"However, as the active light source 110 and the sensing device 120 intermittently detects changes of the lights and the shadows, re-activation of the sensing system 100 may be delayed if the sensing device 120 cannot capture the motion of the hand immediately (i.e., the hand moves too fast). This is because the sensing system 100 is operated at a relatively low frequency under the standby mode and may miss the motion of the hand. As a result, the user feels delay when trying to re-activate the sensing system from the standby mode."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "With this in mind, it is one objective of the present invention to provide detection and re-activation mechanism of a gesture senor under a standby mode, which utilizes an auxiliary sensing device to continually detects the hand instead of intermittently activating the gesture sensor to detect the hand. Therefore, the motion of the hand will not be missed and the gesture sensor can enter the normal operating state once the user tries to do so. Embodiments of the present invention provide a variety of ways for implementing the auxiliary sensing device, all of which cost less power than intermittently activating the gesture sensor.

"According to a first aspect of the present invention, an electronic device is provided. The electronic device comprises: a sensing system having a first sensing device, a second sensing device and a control unit. The sensing system is arranged for selectively detecting an object to generate a first detection result, wherein the first detection result indicates a state of motion of the object. The second sensing device is arranged for selectively detecting the object to generate a second detection result, wherein the second detection result indicates whether the object is in a specific space. The control unit is coupled to the first sensing device and the second sensing device, and is arranged for controlling operating states of the first sensing device and the second sensing device according to the first and the second detection results.

"According to a second aspect of the present invention, a sensor array is provided. The sensor array comprises: a plurality of first sensing units and at least second sensing unit. The first sensing units is arranged for selectively detecting an object to generate a first detection result, wherein the first detection result indicates a state of motion of the object. The second sensing unit is arranged for selectively detecting the object to generate a second detection result, wherein the second detection result indicates whether the object is in a specific space. In addition, operating states of the first sensing device and the second sensing device is determined according to the first and the second detection results.

"According to a third aspect of the present invention, a method of controlling sensing devices is provided. The method comprises: utilizing a first sensing device to selectively detect an object to generate a first detection result, wherein the first detection result indicates a state of motion of the object; utilizing a second sensing device to selectively detect the object to generate a second detection result, wherein the second detection result indicates whether the object is in a specific space; and controlling operating states of the first sensing device and the second sensing device according to the first and the second detection results.

"These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 illustrates a representation of a conventional sensing system.

"FIGS. 2A and 2B illustrate a diagram of operating frequencies of components of the conventional sensing system in a normal operating state and a standby mode.

"FIG. 3 illustrates a representation of an electronic device according to one embodiment of the present invention.

"FIG. 4 illustrates a representation of a sensor array according to one embodiment of the present invention.

"FIG. 5 illustrates a diagram of operating frequencies of components of the electronic device in a normal operating state and a low power consumption operating state.

"FIG. 6 illustrates a diagram of relationship between the timing of a control command and power consumption level of operating frequencies of components of the electronic device in a normal operating state and a low power consumption operating state components of the electronic device.

"FIG. 7 illustrates a flow chart of a method of controlling sensing devices according to one embodiment of the present invention."

For additional information on this patent application, see: Hsu, En-Feng. Sensor Array and Method of Controlling Sensing Device and Related Electronic Device. Filed October 17, 2013 and posted May 15, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5575&p=112&f=G&l=50&d=PG01&S1=20140508.PD.&OS=PD/20140508&RS=PD/20140508

Keywords for this news article include: PixArt Imaging Inc.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Politics & Government Week