Patent Application
20170308190
The entire contents of Taiwan Patent Application No.105112349, filed on Apr. 20, 2016, from which this application claims priority, are expressly incorporated herein by reference.
Touch panels which widely use capacitive touch input technology, not only allow user to proceed input operation via user's hand so as to have a multi touch function which can generate a variety of applications according to specific corresponding operations by various gestures, but also allow user to utilize a capacitive pointer to perform exquisite input operations such as writing or to execute application programs on a touch panel via user interfaces. The coordinates of a capacitive pointer can be detected via capacitive coupling between detection electrodes of a touch panel and the capacitive pointer when the capacitive pointer approaches or contacts the touch panel. In order to establish capacitive coupling with detection electrodes of a touch panel, a capacitive pointer must receive driving signals from detection electrodes and output signals to detection electrodes so that coordinates of the capacitive pointer can be detected. In order to maintain operation, a capacitive pointer must continue receiving driving signals from detection electrodes and outputting signals. However, continuing to output signals is not always necessary and continuous high voltage output also consumes electrical energy quickly. Thus the invention provides a capacitive stylus with a power saving apparatus which outputs high voltage signals when the capacitive stylus accelerates or moves so as to save unnecessary electrical power consumption and to achieve objective of power saving.
An object of the present invention is to provide a capacitive stylus with a power saving apparatus which uses a controller to control a stylus circuit to output a high voltage when the capacitive stylus accelerates or moves so as to save electrical power of the capacitive stylus.
According to the object, one embodiment of the present invention provides a capacitive stylus with a power saving apparatus comprising a controller, a motion sensor and a power circuit. The power circuit regulates or converts a voltage from a power source to the controller, wherein the controller controls the capacitive stylus to output a voltage signal or to stop outputting a voltage signal according to whether the motion sensor detect an accelerations or a motion of the capacitive stylus or not.
Another embodiment of the present invention provides a capacitive stylus with a power saving apparatus comprising a controller, a motion sensor and a power circuit comprising a switch circuit. The motion sensor outputs a first signal to the power circuit when the motion sensor detects an acceleration or a motions of the capacitive stylus, the power circuit regulates or converts a voltage from a power source so that the controller controls the capacitive stylus to output a first voltage signal.
Another embodiment of the present invention provides a capacitive stylus with a power saving apparatus comprising a controller, a power circuit and a motion sensor. The power circuit regulates or converts a voltage from a power source to the controller. The motion sensor outputs a first signal to the controller when the motion sensor detects an acceleration or a motions of the capacitive stylus, and the controller controls the capacitive stylus to output a first voltage signal.
The accompanying drawings illustrate various embodiments of the present invention and are a part of the specification. The illustrated embodiments are merely examples of the present invention and do not limit the scope of the invention.
The detailed description of the present invention will be discussed in the following embodiments, which are not intended to limit the scope of the present invention, but can be adapted for other applications. While drawings are illustrated in details, it is appreciated that the scale of each component may not be expressly exactly.
In embodiments of the invention, some features related to a capacitive stylus which are not essential to the invention and are well known for any person skilled in the art to make and use the same will not be described in detail herein. For example, the following features relating to a capacitive stylus and a touch panel are well known for any person skilled in the art to make and use the same. A capacitive stylus includes a conductive nib, a pressure sensor, an amplifier circuit, a comparator circuit, and a boost circuit which provides high voltage outputs, etc. While a touch panel has a capacitive detection array with a plurality of detection electrodes, wherein the detection electrodes comprise transmitting electrodes (Tx) and receiving electrodes (Rx). When a capacitive stylus is used upon a touch panel, the conductive nib approaches or contacts the capacitive detection array of the touch panel, and the conductive nib of the capacitive stylus will establish capacitive coupling with the detection electrodes under or adjacent the capacitive stylus which provide the capacitive stylus with driving signals. The capacitive stylus outputs a signal to the detection electrodes under or adjacent the capacitive stylus after receiving and processing the driving signals. Through capacitive coupling between the conductive tip and the detection electrodes, the signal from the capacitive stylus will be detected during scanning transmitting electrodes and receiving electrodes so that coordinates of the capacitive stylus can be calculated and determined. The capacitive detection array can use charge accumulation circuit, a capacitance modulation circuit, or other capacitance sensing methods known by those skilled in the art.
In this embodiment, the capacitive stylus with a power saving apparatus utilizes the motion sensor 13 to control the switch circuit 14 to drive the power circuit 16 to regulate or convert voltage outputs from the power source 18 to the controller 12.
The motion sensor 13 outputs signals to the switch circuit 14 when the motion sensor 13 detects accelerations or motions of the capacitive stylus. The switch circuit 14 drives the power circuit 16 according to the signals to regulate or convert voltage outputs from the power source 18 to the controller 12 so that the power circuit 16 provides the controller 12 with higher voltage outputs and the controller 12 controls the capacitive stylus to output high voltage signals. The motion sensor 13 outputs other signals to the switch circuit 14 or does not output any signal when the motion sensor 13 does not detect any acceleration or motion of the capacitive stylus. The switch circuit 14 drives the power circuit 16 to regulate or convert voltage outputs from the power source 18 to the controller 12 so that the power circuit 16 provides the controller 12 with lower voltage outputs and the controller 12 controls the capacitive stylus to stop outputting high voltage signals or to lower voltages of high voltage signals so as to save power consumption of the capacitive stylus.
In this embodiment, the capacitive stylus with a power saving apparatus utilizes the motion sensor 13 to control the power circuit 17, and uses the switch circuit 15 to control the power circuit 17 regulate or convert voltage outputs from the power source 18 to the controller 12. The motion sensor 13 outputs signals to the power circuit 17 when the motion sensor 13 detects accelerations or motions of the capacitive stylus. The switch circuit 15 drives the power circuit 16 according to the signals to drive the power circuit 17 to regulate or convert voltage outputs from the power source 18 to the controller 12 so that the power circuit 17 provides the controller 12 with higher voltage outputs and the controller 12 controls the capacitive stylus to output high voltage signals. The motion sensor 13 outputs other signals to the power circuit 17 or does not output any signal when the motion sensor 13 does not detect any acceleration or motion of the capacitive stylus. The switch circuit 15 drives the power circuit 17 to regulate or convert voltage outputs from the power source 18 to the controller 12 so that the power circuit 17 provides the controller 12 with lower voltage outputs and the controller 12 controls the capacitive stylus to stop outputting high voltage signals or to lower voltages of high voltage signals so as to decrease power consumption of the capacitive stylus.
The motion sensor 13 outputs signals to the controller 12 when the motion sensor 13 detects accelerations or motions of the capacitive stylus. The controller 12 controls the stylus circuit to output high voltage signals according to the signals of the motion sensor 13. The motion sensor 13 outputs other signals to the controller 12 or does not output any signal when the motion sensor 13 does not detect any acceleration or motion of the capacitive stylus. The controller 12 controls the stylus circuit to stop outputting high voltage signals or to lower voltages of high voltage signals so as to save power consumption of the capacitive stylus.
The schematic block diagrams illustrating various embodiments of a capacitive stylus with a power saving apparatus shown in
The capacitive stylus with a power saving apparatus of the claimed invention outputs high voltage signals only when a motion sensor detects acceleration or motion of the capacitive stylus. The capacitive stylus would stop outputting high voltage signals or lower voltages of the high voltage signals so as to save power consumption of the capacitive stylus.
Although specific embodiments have been illustrated and described, it will be appreciated by those skilled in the art that various modifications may be made without departing from the scope of the present invention, which is intended to be limited solely by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 105112349 | Apr 2016 | TW | national |
