CN105955526A - touch device - Google Patents
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- CN105955526A CN105955526A CN201610257583.5A CN201610257583A CN105955526A CN 105955526 A CN105955526 A CN 105955526A CN 201610257583 A CN201610257583 A CN 201610257583A CN 105955526 A CN105955526 A CN 105955526A
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- 238000001514 detection method Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 18
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- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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Abstract
Description
技术领域technical field
本发明涉及触控装置，尤其涉及一种能够降低电容笔功耗的触控装置。The invention relates to a touch device, in particular to a touch device capable of reducing power consumption of a capacitive pen.
背景技术Background technique
随着信息技术的发展，诸如便携式移动设备的电子设备与人们的生活越发密切相关。这种便携式移动设备可以接收用户的输入，并根据该输入来执行用户期望的功能。作为接收用户输入的输入装置，触控装置以其体积小、重量轻、易于操作的优点而被广泛使用。With the development of information technology, electronic devices such as portable mobile devices are more and more closely related to people's lives. Such a portable mobile device can receive user input, and perform user desired functions according to the input. As an input device for receiving user input, touch devices are widely used due to their advantages of small size, light weight and easy operation.
触控装置主要分为两种，电阻式触控装置和电容式触控装置。电阻式触控装置成本低、易于制造，但是只能支持单指操作。电容式触控装置的可操作性较强、支持多指功能，因而成为目前触控装置的首选。Touch devices are mainly divided into two types, resistive touch devices and capacitive touch devices. Resistive touch devices are low in cost and easy to manufacture, but they can only support single-finger operation. The capacitive touch device has strong operability and supports multi-finger function, so it has become the first choice of the touch device at present.
电容触控装置包括电容触控屏，电容触控屏可以通过分布于其上的正交电容图形来感知手指(或触笔)触摸引起的电容变化，从而测量触摸位置和触摸强度。电容触控屏可以是位于电容触控装置前面的透明面板，也可以是不透明的人机交互板。The capacitive touch device includes a capacitive touch screen. The capacitive touch screen can sense the capacitance change caused by the touch of a finger (or stylus) through the orthogonal capacitance pattern distributed thereon, so as to measure the touch position and touch intensity. The capacitive touch screen can be a transparent panel located in front of the capacitive touch device, or it can be an opaque human-computer interaction board.
由于能被触控屏感知的导电体需要较大的接触面积，所以会造成定位不准的问题，同时对笔的支持一直不是非常理想。因此，人们期待电容触控装置能支持笔的书写，至少包括纤细笔头、悬空感应、精准定位、压感精确等功能。Since the conductive body that can be sensed by the touch screen needs a large contact area, it will cause the problem of inaccurate positioning, and at the same time, the support for the pen has not been very ideal. Therefore, people expect capacitive touch devices to support pen writing, at least including functions such as slim pen tip, suspension sensing, precise positioning, and precise pressure sensitivity.
主动电容笔解决了上述问题，它是一种与电容触控屏配合使用的电容笔。主动电容笔可以发送与电容触控屏同步的高压脉冲信号，增强了电容感应，从而可以减小接触面积，同时细笔头明显增强了用户体验。The active capacitive pen solves the above problems, and it is a capacitive pen used in conjunction with a capacitive touch screen. The active capacitive pen can send a high-voltage pulse signal synchronized with the capacitive touch screen, which enhances the capacitive sensing, thereby reducing the contact area, while the thin tip significantly enhances the user experience.
图1示出了触控装置的工作原理的示意图。FIG. 1 shows a schematic diagram of the working principle of a touch device.
如图1所示，触控装置包括：面板，其上配置有相互正交的用于收发信号的平行电容极板；发送电容极板，其设置在所述面板上，用于向外发送探测波；笔11，其通过笔头接收面板发送的同步及命令信息，再通过笔头向所述面板发送信号波；接收电容极板，其设置在所述面板上，用于接收所述发送电容极板的探测波和所述笔的信号波；模拟信号处理单元，其根据控制处理单元选择的电容极板来发送相应波形，或者预处理来自接收电容极板信号；控制处理单元14，其将预处理后的接收信号通过AD转换为数字信号，并通过处理得到触摸位置，在笔为电容笔的情况下得到笔的位置以及笔回传的信息。As shown in Figure 1, the touch control device includes: a panel, on which are configured parallel capacitive plates orthogonal to each other for sending and receiving signals; sending capacitive plates, which are arranged on the panel, and are used to send out detection Wave; pen 11, which receives the synchronization and command information sent by the panel through the pen head, and then sends signal waves to the panel through the pen head; receiving capacitor plate, which is arranged on the panel, for receiving the sending capacitor plate The probe wave and the signal wave of the pen; the analog signal processing unit, which sends the corresponding waveform according to the capacitor plate selected by the control processing unit, or pre-processes the signal from the receiving capacitor plate; the control processing unit 14, which preprocesses The final received signal is converted into a digital signal through AD, and the touch position is obtained through processing. In the case of a capacitive pen, the position of the pen and the information returned by the pen are obtained.
可见，电容笔与电容触控板进行信息交互的方式大多是通过与触控板间的电容耦合实现的，即通过笔头位置的金属结构与电容触控板进行交互。It can be seen that the information interaction between the capacitive pen and the capacitive touch panel is mostly realized through capacitive coupling with the touch panel, that is, through the metal structure at the tip of the pen to interact with the capacitive touch panel.
电容笔的笔头与触控屏之间的耦合电容很小，大概在100fF到1.5pF之间，并且这个电容随着电容笔的笔头与触控屏之间的距离的增大而减小，因此，电容笔与触控屏之间的通信链路的容抗非常大，触控屏要接收到笔头发送的信号就必须提高电容笔的笔头发送信号的幅值。发送信号的幅值一般为25V，幅值提高必然会增加电容笔的功耗，这主要由两方面造成：第一，功率计算公式P＝U2/R，U增大导致功率P增大。第二，电容笔通过电池供电，电池电压一般为1.2V到3.7V，而升压到25V，中间必然有转换损耗。The coupling capacitance between the tip of the capacitive pen and the touch screen is very small, about 100fF to 1.5pF, and this capacitance decreases with the increase of the distance between the tip of the capacitive pen and the touch screen, so , the capacitive reactance of the communication link between the capacitive pen and the touch screen is very large, and the touch screen must increase the amplitude of the signal sent by the pen tip of the capacitive pen to receive the signal sent by the pen tip. The amplitude of the sent signal is generally 25V, increasing the amplitude will inevitably increase the power consumption of the capacitive pen, which is mainly caused by two aspects: first, the power calculation formula P=U 2 /R, the increase of U leads to the increase of power P. Second, the capacitive pen is powered by a battery, and the battery voltage is generally 1.2V to 3.7V, and when it is boosted to 25V, there must be conversion loss in the middle.
因此，现有技术的电容笔存在功耗较高的问题。Therefore, the capacitive pen in the prior art has the problem of high power consumption.
发明内容Contents of the invention
本发明提供了一种触控装置，包括电容笔和触控屏。这种电容笔能够根据情况降低发送信号的幅度，从而在保证电容笔正常工作的前提下减小了电容笔的功耗。The invention provides a touch device, which includes a capacitive pen and a touch screen. The capacitive pen can reduce the amplitude of the sending signal according to the situation, thereby reducing the power consumption of the capacitive pen under the premise of ensuring the normal operation of the capacitive pen.
本发明的触控装置包括电容笔和触控屏，其特征在于，所述电容笔包括：笔杆；笔头；容纳在所述笔杆内的发送电路和发送控制单元，所述发送控制单元控制所述发送电路经由所述笔头向所述触控屏发送信号；其中，在满足规定条件时，所述发送控制单元调整所述发送电路向所述触控屏发送的信号的幅度。The touch device of the present invention includes a capacitive pen and a touch screen, wherein the capacitive pen includes: a pen holder; a pen head; a sending circuit and a sending control unit accommodated in the pen holder, and the sending control unit controls the The sending circuit sends a signal to the touch screen via the pen tip; wherein, when a specified condition is met, the sending control unit adjusts the amplitude of the signal sent by the sending circuit to the touch screen.
优选地，所述电容笔还包括：接触检测单元，其位于所述笔头处，检测所述笔头与所述触控屏之间是否接触，并且所述规定条件是所述接触检测单元感测到所述笔头与所述触控屏之间的接触，其中，当所述笔头与所述触控屏之间接触时所述发送控制单元控制所述发送电路以较低的幅度向所述触控屏发送信号，当所述笔头与所述触控屏之间没有接触时所述发送控制单元控制所述发送电路以较高的幅度向所述触控屏发送信号。Preferably, the capacitive pen further includes: a contact detection unit, which is located at the tip of the pen and detects whether there is contact between the tip of the pen and the touch screen, and the specified condition is that the contact detection unit senses The contact between the pen head and the touch screen, wherein when the pen head is in contact with the touch screen, the sending control unit controls the sending circuit to send When there is no contact between the pen tip and the touch screen, the sending control unit controls the sending circuit to send a signal to the touch screen with a relatively high amplitude.
优选地，所述接触检测单元是压力传感器。Preferably, the contact detection unit is a pressure sensor.
优选地，所述电容笔还包括：容纳在所述笔杆内的接收电路，其经由所述笔头从所述触控屏接收信号，并且，所述触控屏包括接收单元和发送单元，其中，所述触控屏的接收单元接收所述笔头发送的信号，所述触控屏的发送单元向所述电容笔发送信号，所述电容笔的所述接收电路经由所述笔头接收所述触控屏发送的信号，其中，所述规定条件是所述电容笔的接收电路从所述触控屏接收到幅度调整命令。Preferably, the capacitive pen further includes: a receiving circuit accommodated in the pen holder, which receives signals from the touch screen via the pen tip, and the touch screen includes a receiving unit and a sending unit, wherein, The receiving unit of the touch screen receives the signal sent by the tip, the sending unit of the touch screen sends a signal to the capacitive pen, and the receiving circuit of the capacitive pen receives the touch signal via the pen tip. The signal sent by the touch screen, wherein the specified condition is that the receiving circuit of the capacitive pen receives an amplitude adjustment command from the touch screen.
优选地，当所述触控屏判定从所述电容笔接收到的信号的幅度高于最大幅度阈值时，所述触控屏向所述电容笔的接收单元发送所述幅度调整命令，并且，响应于所述幅度调整命令，所述电容笔的所述发送控制单元降低所述发送电路向所述触控屏发送信号的幅度，并且，当所述触控屏判定从所述笔头接收到的信号的幅度低于最小幅度阈值时，所述触控屏向所述电容笔的接收电路发送所述幅度调整命令，并且，响应于所述幅度调整命令，所述电容笔的所述发送控制单元升高所述发送电路向所述触控屏发送信号的幅度。Preferably, when the touch screen determines that the amplitude of the signal received from the capacitive pen is higher than the maximum amplitude threshold, the touch screen sends the amplitude adjustment command to the receiving unit of the capacitive pen, and, In response to the amplitude adjustment command, the sending control unit of the capacitive pen reduces the amplitude of the signal sent by the sending circuit to the touch screen, and when the touch screen determines that the signal received from the pen head When the amplitude of the signal is lower than the minimum amplitude threshold, the touch screen sends the amplitude adjustment command to the receiving circuit of the capacitive pen, and in response to the amplitude adjustment command, the sending control unit of the capacitive pen increasing the amplitude of the signal sent by the sending circuit to the touch screen.
优选地，所述最大幅度阈值对应于所述电容笔发送的信号经所述触控屏的控制电路放大后的饱和值。Preferably, the maximum amplitude threshold corresponds to a saturation value of the signal sent by the capacitive pen amplified by the control circuit of the touch screen.
优选地，所述最小幅度阈值是维持所述电容笔与所述触控屏进行通信所需的最小信号幅度。Preferably, the minimum amplitude threshold is a minimum signal amplitude required to maintain communication between the capacitive stylus and the touch screen.
优选地，所述触控屏还包括：距离检测单元，其位于所述触控屏的主控制板上，检测所述笔头与所述触控屏之间的距离变化，并且，在所述最大幅度阈值和所述最小幅度阈值之间设置了至少一个中间阈值，其中，当所述距离检测单元检测到所述笔头与所述触控屏之间的距离减小时，所述触控屏判定从所述电容笔接收到的信号的幅度是否超过了所述至少一个中间阈值中的一个，如果是，则每超过一个中间阈值，向所述电容笔的所述发送控制单元发出命令，降低所述发送电路向所述触控屏发送的信号的幅度，并且，当所述距离检测单元检测到所述笔头与所述触控屏之间的距离增大时，所述触控屏判定从所述电容笔接收到的信号的幅度是否低过了所述至少一个中间阈值中的一个，如果是，则每低过一个中间阈值，向所述电容笔的所述发送控制单元发出命令，升高所述发送电路向所述触控屏发送的信号的幅度。Preferably, the touch screen further includes: a distance detection unit, which is located on the main control board of the touch screen, detects the change of the distance between the pen tip and the touch screen, and, at the maximum At least one intermediate threshold is set between the amplitude threshold and the minimum amplitude threshold, wherein, when the distance detection unit detects that the distance between the pen tip and the touch screen decreases, the touch screen determines from Whether the magnitude of the signal received by the capacitive pen exceeds one of the at least one intermediate threshold, and if so, each time an intermediate threshold is exceeded, an order is sent to the sending control unit of the capacitive pen to reduce the The amplitude of the signal sent by the sending circuit to the touch screen, and when the distance detection unit detects that the distance between the pen head and the touch screen increases, the touch screen determines that the Whether the magnitude of the signal received by the capacitive pen is lower than one of the at least one intermediate threshold, and if so, each time it is lower than an intermediate threshold, a command is sent to the sending control unit of the capacitive pen to increase the The amplitude of the signal sent by the sending circuit to the touch screen.
优选地，所述距离检测单元感测所述笔头与所述触控屏之间的耦合电容的大小，由此检测所述笔头与所述触控屏之间的距离。Preferably, the distance detection unit senses the magnitude of the coupling capacitance between the pen tip and the touch screen, thereby detecting the distance between the pen tip and the touch screen.
附图说明Description of drawings
图1是触控装置的工作原理的示意图；1 is a schematic diagram of the working principle of a touch device;
图2示出了本发明实施方式的触控装置的示意图；FIG. 2 shows a schematic diagram of a touch device according to an embodiment of the present invention;
图3示出了本发明实施方式的电容笔的结构框图；Fig. 3 shows the structural block diagram of the capacitive pen of the embodiment of the present invention;
图4示出了主动电容笔与触摸屏之间的单向通信的示意图；Fig. 4 shows a schematic diagram of the one-way communication between the active capacitive pen and the touch screen;
图5示出了主动电容笔与触摸屏之间的双向通信的示意图；Fig. 5 shows a schematic diagram of two-way communication between an active capacitive pen and a touch screen;
图6A和6B示出了本发明的触控装置调整发送信号幅度的第一实施方式的示意图；6A and 6B are schematic diagrams of a first embodiment of adjusting the amplitude of a sent signal by a touch control device of the present invention;
图7示出了本发明的触控装置调整发送信号幅度的第二实施方式的示意图；FIG. 7 shows a schematic diagram of a second embodiment of adjusting the amplitude of a sent signal by a touch control device of the present invention;
图8A和8B示出了本发明的触控装置调整发送信号幅度的第二实施方式的进一步示意图；8A and 8B are further schematic diagrams of the second embodiment of adjusting the amplitude of the sent signal by the touch control device of the present invention;
图9示出了本发明实施方式的电容笔的进一步结构框图。Fig. 9 shows a further structural block diagram of the capacitive pen according to the embodiment of the present invention.
具体实施方式detailed description
为使本领域技术人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明提供的电容笔进行详细描述。在这些附图中，对于相同或者相当的构成要素，标注相同标号。以下仅为本发明的电容笔的最佳实施方式，本发明并不仅限于下述结构。In order to enable those skilled in the art to better understand the technical solution of the present invention, the capacitive pen provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. In these drawings, the same reference numerals are assigned to the same or corresponding components. The following are only the best implementation modes of the capacitive pen of the present invention, and the present invention is not limited to the following structures.
参照图2，本发明的触控装置包括电容笔10和触控屏20。下面主要对电容笔10进行详细说明。Referring to FIG. 2 , the touch device of the present invention includes a capacitive pen 10 and a touch screen 20 . The capacitive pen 10 will be described in detail below.
图3示出了本发明实施方式的电容笔的结构框图。Fig. 3 shows a structural block diagram of a capacitive pen according to an embodiment of the present invention.
如图3所示，本发明的电容笔10包括：笔杆100；笔头102；容纳在笔杆100内的发送电路110和发送控制单元104。发送控制单元104控制发送电路110经由笔头102向触控屏20(图中未示出)发送信号。发送控制单元104被设置为，当满足规定条件时，调整发送电路110经由笔头102向触控屏20发送的信号的幅度。As shown in FIG. 3 , the capacitive pen 10 of the present invention includes: a pen holder 100 ; a pen tip 102 ; a sending circuit 110 and a sending control unit 104 accommodated in the pen holder 100 . The sending control unit 104 controls the sending circuit 110 to send signals to the touch screen 20 (not shown in the figure) via the pen tip 102 . The sending control unit 104 is configured to adjust the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 via the pen head 102 when a specified condition is met.
下面结合图4至图7详细说明本发明的电容笔10。The capacitive stylus 10 of the present invention will be described in detail below with reference to FIG. 4 to FIG. 7 .
电容笔与触控屏之间的交互方式主要有两种：单向通信和双向通信。There are two main modes of interaction between the capacitive pen and the touch screen: one-way communication and two-way communication.
当电容笔与触控屏之间的交互方式为单项通信时，电容笔的笔头仅包括笔尖，用来向触控屏20发送信号。当电容笔10与触控屏20之间的交互方式为双向通信时，参考图9，这里，笔头102包括笔尖1021和位于笔头102与笔杆100接触位置外围的一个线圈1022。笔尖1021和线圈1022分别用来向触控屏20发送信号和从触控屏20接收信号。When the interaction mode between the capacitive stylus and the touch screen is one-way communication, the tip of the capacitive stylus only includes a pen tip for sending signals to the touch screen 20 . When the interactive mode between the capacitive pen 10 and the touch screen 20 is two-way communication, refer to FIG. 9 , where the pen tip 102 includes a pen tip 1021 and a coil 1022 located around the contact position between the pen tip 102 and the pen barrel 100 . The pen tip 1021 and the coil 1022 are respectively used for sending signals to the touch screen 20 and receiving signals from the touch screen 20 .
图4和图5分别示出了这两种通信方式的示意图。Fig. 4 and Fig. 5 respectively show schematic diagrams of these two communication modes.
如图4所示，在单向通信方式中，电容笔10具有发送电路110。发送电路110通过笔头向触控屏20发送信号S1。触控屏20接收电容笔10发送的信号S1，由此进行相应的操作。在这种通信方式下，电容笔10仅向触控屏20发送信号而不从触控屏20接收信号。As shown in FIG. 4 , in the one-way communication mode, the capacitive pen 10 has a sending circuit 110 . The sending circuit 110 sends a signal S1 to the touch screen 20 through the pen tip. The touch screen 20 receives the signal S1 sent by the capacitive stylus 10 to perform corresponding operations. In this communication mode, the capacitive stylus 10 only sends signals to the touch screen 20 but does not receive signals from the touch screen 20 .
如图5所示，在双向通信方式中，电容笔10具有发送电路110和接收电路112。发送电路110通过笔头向触控屏20发送信号S1，触控屏20接收信号S1。另一方面，触控屏20向电容笔10发送信号S2，电容笔10的接收电路112通过笔头接收该信号S2。在这种通信方式下，电容笔10既向触控屏20发送信号，又从触控屏20接收信号。As shown in FIG. 5 , in the two-way communication mode, the capacitive pen 10 has a sending circuit 110 and a receiving circuit 112 . The sending circuit 110 sends a signal S1 to the touch screen 20 through the pen tip, and the touch screen 20 receives the signal S1. On the other hand, the touch screen 20 sends a signal S2 to the capacitive stylus 10, and the receiving circuit 112 of the capacitive stylus 10 receives the signal S2 through the tip of the pen. In this communication mode, the capacitive pen 10 both sends signals to the touch screen 20 and receives signals from the touch screen 20 .
在上述两种通信方式中，电容笔10都要向触控屏20发送信号。本发明的电容笔10通过发送控制单元104来调整发送信号的幅度，从而降低电容笔10的功耗。In the above two communication methods, the capacitive stylus 10 must send signals to the touch screen 20 . The capacitive stylus 10 of the present invention adjusts the amplitude of the sending signal through the sending control unit 104 , thereby reducing the power consumption of the capacitive stylus 10 .
下面参照图6至图8详细说明如何调整发送信号的幅度。How to adjust the amplitude of the sending signal will be described in detail below with reference to FIG. 6 to FIG. 8 .
图6A和图6B示出了本发明实施方式的触控装置调整发送信号幅度的第一实施方式的示意图。FIG. 6A and FIG. 6B are schematic diagrams of a first embodiment in which the touch device adjusts the amplitude of the sending signal according to the embodiment of the present invention.
在第一实施方式中，电容笔10仅仅包括发送单元而不包括接收单元，即，上述单向通信方式。电容笔10可以包括接触检测单元108，其位于笔头处，检测笔头与触控屏20之间是否接触。In the first embodiment, the capacitive stylus 10 only includes a sending unit and does not include a receiving unit, that is, the above-mentioned one-way communication method. The capacitive stylus 10 may include a contact detection unit 108 located at the tip of the pen to detect whether there is contact between the tip of the pen and the touch screen 20 .
当接触检测单元108感测到笔头与触控屏20之间没有接触时，发送控制单元104控制笔头以较高的幅度V1’向触控屏20发送信号；当接触检测单元108感测到笔头与触控屏20之间接触时，发送控制单元104控制笔头以较低的幅度V2’向触控屏20发送信号。When the contact detection unit 108 senses that there is no contact between the pen head and the touch screen 20, the sending control unit 104 controls the pen head to send a signal to the touch screen 20 with a higher amplitude V1'; When in contact with the touch screen 20 , the sending control unit 104 controls the pen tip to send a signal to the touch screen 20 with a relatively low amplitude V2 ′.
接触检测单元108可以是任意能够检测接触状态的元件。例如，接触检测单元108可以是压力传感器。The contact detection unit 108 may be any element capable of detecting a contact state. For example, the contact detection unit 108 may be a pressure sensor.
图7示出了本发明的触控装置调整发送信号幅度的第二实施方式的示意图。FIG. 7 shows a schematic diagram of a second embodiment of adjusting the amplitude of a sending signal by a touch control device of the present invention.
在图7中，电容笔10还包括容纳在笔杆内的接收电路112，其从触控屏20接收信号。触控屏20也包括接收单元和发送单元(未示出)。触控屏20的接收单元接收笔头发送的信号，触控屏20的发送单元向电容笔10发送信号。In FIG. 7 , the capacitive pen 10 further includes a receiving circuit 112 accommodated in the barrel, which receives signals from the touch screen 20 . The touch screen 20 also includes a receiving unit and a sending unit (not shown). The receiving unit of the touch screen 20 receives the signal sent by the tip of the pen, and the sending unit of the touch screen 20 sends the signal to the capacitive pen 10 .
当电容笔10的接收电路112从触控屏20接收到幅度调整命令时，发送控制单元104调整发送电路110通过笔头向触控屏20发送的信号的幅度。When the receiving circuit 112 of the capacitive pen 10 receives an amplitude adjustment command from the touch screen 20 , the sending control unit 104 adjusts the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 through the tip of the pen.
下面结合图7进行更详细的说明。A more detailed description will be made below in conjunction with FIG. 7 .
电容笔10的发送电路110向触控屏20发送幅度为V的信号。The sending circuit 110 of the capacitive pen 10 sends a signal with amplitude V to the touch screen 20 .
当触控屏判定从电容笔10接收到的信号的幅度V过大，例如高于预先定义的最大幅度阈值时，触控屏20向电容笔10的接收电路112发送幅度调整命令。接收到该幅度调整命令后，电容笔10的发送控制单元104降低发送电路110向触控屏20发送信号的幅度V。When the touch screen determines that the amplitude V of the signal received from the capacitive stylus 10 is too large, for example higher than a predefined maximum amplitude threshold, the touch screen 20 sends an amplitude adjustment command to the receiving circuit 112 of the capacitive stylus 10 . After receiving the amplitude adjustment command, the sending control unit 104 of the capacitive pen 10 reduces the amplitude V of the signal sent by the sending circuit 110 to the touch screen 20 .
另外，当触控屏20判定从电容笔10接收到的信号的幅度V过小，例如低于预先定义的最小幅度阈值时，触控屏20向电容笔10的接收电路112发送幅度调整命令。接收到该幅度调整命令后，电容笔10的发送控制单元104升高发送电路110向触控屏20发送信号的幅度V。In addition, when the touch screen 20 determines that the amplitude V of the signal received from the capacitive stylus 10 is too small, for example, lower than a predefined minimum amplitude threshold, the touch screen 20 sends an amplitude adjustment command to the receiving circuit 112 of the capacitive stylus 10 . After receiving the amplitude adjustment command, the sending control unit 104 of the capacitive pen 10 increases the amplitude V of the signal sent by the sending circuit 110 to the touch screen 20 .
此处，最大幅度阈值例如是对应电容笔10发送的信号经触控屏控制电路放大后的饱和值。最小幅度阈值是维持电容笔10与触控屏20进行通信所需的最小信号幅度。Here, the maximum amplitude threshold is, for example, a saturation value corresponding to the signal sent by the capacitive pen 10 after being amplified by the touch screen control circuit. The minimum amplitude threshold is the minimum signal amplitude required to maintain communication between the capacitive stylus 10 and the touch screen 20 .
下面结合图8A和8B详细描述本发明的第二实施方式。The second embodiment of the present invention will be described in detail below with reference to FIGS. 8A and 8B .
图8A和8B示出了本发明的触控装置调整发送信号幅度的第二实施方式的进一步示意图。8A and 8B show further schematic diagrams of the second embodiment of adjusting the amplitude of the sent signal by the touch control device of the present invention.
在图8A和8B中，触控屏20还包括距离检测单元114，其位于触控屏20的主控制板(未示出)上，检测笔头与触控屏20之间的距离变化。In FIGS. 8A and 8B , the touch screen 20 further includes a distance detection unit 114 , which is located on the main control board (not shown) of the touch screen 20 and detects the change of the distance between the pen tip and the touch screen 20 .
如图8A所示，电容笔10以幅度V1向触控屏20发送信号。与此同时，电容笔10逐渐靠近触控屏20，例如，用户准备要在触控屏20上进行书写的过程。在这个过程中，触控屏20判定接收到的信号幅度是否超过了所需的信号幅度，如果是，则向电容笔10发送命令，电容笔10的发送控制单元104降低发送电路110发送信号的幅度为V2。由此实现电容笔10的低功耗。As shown in FIG. 8A , the capacitive stylus 10 sends a signal to the touch screen 20 with an amplitude V1. At the same time, the capacitive stylus 10 gradually approaches the touch screen 20 , for example, the user is preparing to write on the touch screen 20 . In this process, the touch screen 20 determines whether the received signal amplitude exceeds the required signal amplitude, and if so, then sends a command to the capacitive pen 10, and the sending control unit 104 of the capacitive pen 10 reduces the signal sent by the sending circuit 110. The amplitude is V2. As a result, low power consumption of the capacitive pen 10 is achieved.
在本发明的一个实施例中，在上述最大幅度阈值和最小幅度阈值之间设置了至少一个中间阈值，当距离检测单元114检测到笔头与触控屏20之间的距离减小时，触控屏20判定从电容笔10接收到的信号的幅度是否超过了所述至少一个中间阈值中的一个。In one embodiment of the present invention, at least one intermediate threshold is set between the maximum amplitude threshold and the minimum amplitude threshold. When the distance detection unit 114 detects that the distance between the pen tip and the touch screen 20 decreases, the touch screen 20 determining whether the magnitude of the signal received from the capacitive stylus 10 exceeds one of said at least one intermediate threshold.
如果是，则每超过一个中间阈值，向电容笔10的发送控制单元104发出命令，降低发送电路110向触控屏20发送的信号的幅度。If so, every time an intermediate threshold is exceeded, a command is sent to the sending control unit 104 of the capacitive pen 10 to reduce the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 .
当距离检测单元114检测到笔头与触控屏20之间的距离增大时，触控屏20判定从电容笔10接收到的信号的幅度是否低过了所述至少一个中间阈值中的一个。When the distance detecting unit 114 detects that the distance between the pen tip and the touch screen 20 increases, the touch screen 20 determines whether the amplitude of the signal received from the capacitive pen 10 is lower than one of the at least one intermediate threshold.
如果是，则每低过一个中间阈值，向电容笔10的发送控制单元104发出命令，升高发送电路110向触控屏20发送的信号的幅度。If so, a command is sent to the sending control unit 104 of the capacitive stylus 10 to increase the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 every time it falls below an intermediate threshold.
具体来讲，例如，在最大幅度阈值与最小幅度阈值之间定义了两个中间阈值，即，第一中间阈值和第二中间阈值，并且第二中间阈值大于第一中间阈值。Specifically, for example, two intermediate thresholds are defined between the maximum amplitude threshold and the minimum amplitude threshold, namely, a first intermediate threshold and a second intermediate threshold, and the second intermediate threshold is greater than the first intermediate threshold.
在这种情况下，当距离检测单元114检测到笔头与触控屏20之间的距离正在减小时，触控屏20判定从电容笔10接收到的信号的幅度是否超过了第一中间阈值。如果否，则触控屏20不采取任何动作。如果是，则向电容笔10的发送控制单元104发出命令，降低发送电路110向触控屏20发送的信号的幅度。In this case, when the distance detection unit 114 detects that the distance between the pen tip and the touch screen 20 is decreasing, the touch screen 20 determines whether the magnitude of the signal received from the capacitive pen 10 exceeds the first intermediate threshold. If not, the touch screen 20 takes no action. If so, send a command to the sending control unit 104 of the capacitive pen 10 to reduce the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 .
随后，距离检测单元114继续检测笔头与触控屏20之间的距离。并且触控屏20判定从电容笔10接收到的信号的幅度是否超过了第二中间阈值。如果否，则触控屏20不采取任何动作。如果是，则向电容笔10的发送控制单元104发出命令，再次降低发送电路110向触控屏20发送的信号的幅度。Subsequently, the distance detection unit 114 continues to detect the distance between the pen tip and the touch screen 20 . And the touch screen 20 determines whether the magnitude of the signal received from the capacitive stylus 10 exceeds the second intermediate threshold. If not, the touch screen 20 takes no action. If so, send a command to the sending control unit 104 of the capacitive pen 10 to reduce the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 again.
另一方面，当距离检测单元114检测到笔头与触控屏20之间的距离正在增大时，触控屏20判定从电容笔10接收到的信号的幅度是否低过了第二中间阈值。如果否，则触控屏20不采取任何动作。如果是，则向电容笔10的发送控制单元104发出命令，升高发送电路110向触控屏20发送的信号的幅度。On the other hand, when the distance detection unit 114 detects that the distance between the pen tip and the touch screen 20 is increasing, the touch screen 20 determines whether the amplitude of the signal received from the capacitive pen 10 is lower than the second intermediate threshold. If not, the touch screen 20 takes no action. If so, send a command to the sending control unit 104 of the capacitive pen 10 to increase the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 .
随后，距离检测单元114继续检测笔头与触控屏20之间的距离。并且触控屏20判定从电容笔10接收到的信号的幅度是否低过了第一中间阈值。如果否，则触控屏20不采取任何动作。如果是，则向电容笔10的发送控制单元104发出命令，再次升高发送电路110向触控屏20发送的信号的幅度。Subsequently, the distance detection unit 114 continues to detect the distance between the pen tip and the touch screen 20 . And the touch screen 20 determines whether the amplitude of the signal received from the capacitive stylus 10 is lower than the first intermediate threshold. If not, the touch screen 20 takes no action. If so, send a command to the sending control unit 104 of the capacitive pen 10 to increase the amplitude of the signal sent by the sending circuit 110 to the touch screen 20 again.
上述实施例中采用了两个中间阈值，但是本发明并不限于两个中间阈值的情况。本领域技术人员根据情况可以采用更多或更少的中间阈值。In the above embodiments, two intermediate thresholds are used, but the present invention is not limited to the case of two intermediate thresholds. Those skilled in the art can adopt more or fewer intermediate thresholds according to the situation.
另外，在本发明中，距离检测单元114感测笔头与触控屏20之间的耦合电容的大小，由此检测笔头与触控屏20之间的距离。In addition, in the present invention, the distance detection unit 114 senses the magnitude of the coupling capacitance between the pen tip and the touch screen 20 , thereby detecting the distance between the pen tip and the touch screen 20 .
如图8A和图8B所示，根据电容耦合的原理，当笔头与触控屏20之间的距离较大时，它们之间的耦合电容C1较小。而随着笔头与触控屏20之间距离的减小，二者之间的耦合电容变大为C2。距离检测单元114就是通过检测耦合电容的变化来间接地检测笔头与触控屏20之间的距离的变化。As shown in FIG. 8A and FIG. 8B , according to the principle of capacitive coupling, when the distance between the pen tip and the touch screen 20 is large, the coupling capacitance C1 between them is small. As the distance between the pen tip and the touch screen 20 decreases, the coupling capacitance between the two becomes larger as C2. The distance detection unit 114 indirectly detects the change of the distance between the pen tip and the touch screen 20 by detecting the change of the coupling capacitance.
利用本发明的触控装置，可以在保证电容笔与触摸屏之间通信质量的前提下有效降低电容笔的功耗，避免了用户频繁更换电池或者充电的麻烦，使用更加方便。With the touch device of the present invention, the power consumption of the capacitive pen can be effectively reduced under the premise of ensuring the communication quality between the capacitive pen and the touch screen, which avoids the trouble of frequent battery replacement or charging by the user, and is more convenient to use.
以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进。这些变型和改进也视为本发明的保护范围。The above embodiments are only exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention. These variations and improvements are also regarded as the protection scope of the present invention.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2601426Y (en) * | 2002-05-04 | 2004-01-28 | 王宜 | Radio input pen |
| CN101578568A (en) * | 2007-01-03 | 2009-11-11 | 路迪亚公司 | Multiple styli annotation system |
| WO2014049331A1 (en) * | 2012-09-26 | 2014-04-03 | Light Blue Optics Limited | Touch sensing systems |
| CN104345920A (en) * | 2013-08-09 | 2015-02-11 | 义隆电子股份有限公司 | Active control method of capacitive stylus and active capacitive stylus |
| CN204178334U (en) * | 2014-10-16 | 2015-02-25 | 昆盈企业股份有限公司 | Active stylus with high-intensity emission signal and its tip assembly |
| CN104484063A (en) * | 2014-12-10 | 2015-04-01 | 北京汉王鹏泰科技有限公司 | Active capacitance pen and touch device |
| US20150130731A1 (en) * | 2013-11-08 | 2015-05-14 | Egalax_Empia Technology Inc. | Processing Device and Processing Method |
| CN105320301A (en) * | 2014-07-03 | 2016-02-10 | 昆盈企业股份有限公司 | Active capacitive pen and sensing method thereof |
| CN205068321U (en) * | 2015-09-18 | 2016-03-02 | 翰硕电子股份有限公司 | Wireless touch control pen |
| CN105468170A (en) * | 2014-08-13 | 2016-04-06 | 比亚迪股份有限公司 | Data transmission method, system and device between capacitive stylus and touch screen |
-
2016
- 2016-04-22 CN CN201610257583.5A patent/CN105955526A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2601426Y (en) * | 2002-05-04 | 2004-01-28 | 王宜 | Radio input pen |
| CN101578568A (en) * | 2007-01-03 | 2009-11-11 | 路迪亚公司 | Multiple styli annotation system |
| WO2014049331A1 (en) * | 2012-09-26 | 2014-04-03 | Light Blue Optics Limited | Touch sensing systems |
| CN104345920A (en) * | 2013-08-09 | 2015-02-11 | 义隆电子股份有限公司 | Active control method of capacitive stylus and active capacitive stylus |
| US20150130731A1 (en) * | 2013-11-08 | 2015-05-14 | Egalax_Empia Technology Inc. | Processing Device and Processing Method |
| CN105320301A (en) * | 2014-07-03 | 2016-02-10 | 昆盈企业股份有限公司 | Active capacitive pen and sensing method thereof |
| CN105468170A (en) * | 2014-08-13 | 2016-04-06 | 比亚迪股份有限公司 | Data transmission method, system and device between capacitive stylus and touch screen |
| CN204178334U (en) * | 2014-10-16 | 2015-02-25 | 昆盈企业股份有限公司 | Active stylus with high-intensity emission signal and its tip assembly |
| CN104484063A (en) * | 2014-12-10 | 2015-04-01 | 北京汉王鹏泰科技有限公司 | Active capacitance pen and touch device |
| CN205068321U (en) * | 2015-09-18 | 2016-03-02 | 翰硕电子股份有限公司 | Wireless touch control pen |
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