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1. 发明授权

US06473075B1 Adaptive frequency touchscreen controller employing digital signal processing 有权
标题翻译：采用数字信号处理的自适应频率触摸屏控制器
公开(公告)号：US06473075B1
公开(公告)日：2002-10-29
申请号：US09408591
申请日：1999-09-29
申请人： Paulo Irulegui Gomes , Shigeki Kambara , Hiroshi Kaneda , Joel Kent , Arie Ravid
发明人： Paulo Irulegui Gomes , Shigeki Kambara , Hiroshi Kaneda , Joel Kent , Arie Ravid
IPC分类号： G09G500
CPC分类号： G06F3/0418 , G06F3/0436
摘要： A method and apparatus for adapting an acoustic touchscreen controller to the operating frequency requirements of a specific touchscreen are provided. The adaptive controller can either utilize look-up tables to achieve the desired output frequency or the it can use a multi-step process in which it first determines the frequency requirements of the touchscreen, and then adjusts the burst frequency characteristics, the receiver circuit center frequency, or both in accordance with the touchscreen requirements. In one embodiment, the adaptive controller compensates for global frequency mismatch errors. In this embodiment a digital multiplier is used to modify the output of a crystal reference oscillator. The reference oscillator output is used to control the frequency of the signal from the receiving transducers and/or to generate the desired frequency of the tone burst sent to the transmitting transducers. In another embodiment that is intended to compensate for both global and local frequency variations, the adaptive controller uses a digital signal processor. The digital signal processor, based on correction values contained in memory, defines a specific center frequency which preferably varies according to the signal delay, thus taking into account variations caused by localized variations in the acoustic wave reflective array. In yet another embodiment, a non-crystal local oscillator is used to provide the reference signal in the adaptive controller. The use of such an oscillator allows the controller to be miniaturized to a sufficient extent that it can be mounted directly to a touchscreen substrate. A feedback loop is used to compensate for oscillator drift. A discriminator circuit determines the degree of deviation from the desired frequency. The output from the discriminator is used to adjust the frequency of the local oscillator such that it tracks the frequency of the touchscreen.
摘要翻译：提供了一种用于使声学触摸屏控制器适应特定触摸屏的操作频率要求的方法和装置。自适应控制器可以使用查找表来实现期望的输出频率，或者可以使用多步骤过程，其中它首先确定触摸屏的频率要求，然后调整突发频率特性，接收器电路中心频率或两者均符合触屏要求。在一个实施例中，自适应控制器补偿全局频率失配误差。在本实施例中，使用数字乘法器来修改晶体参考振荡器的输出。参考振荡器输出用于控制来自接收换能器的信号的频率和/或产生发送到发射换能器的音调脉冲串的期望频率。在旨在补偿全局和局部频率变化的另一实施例中，自适应控制器使用数字信号处理器。数字信号处理器基于存储器中包含的校正值来定义特定的中心频率，其优选地根据信号延迟而变化，因此考虑到由声波反射阵列中的局部变化引起的变化。在又一个实施例中，使用非晶体本地振荡器来在自适应控制器中提供参考信号。使用这种振荡器允许控制器被小型化到足以使其可以直接安装到触摸屏基板上。反馈回路用于补偿振荡器漂移。鉴频器电路确定与期望频率的偏差程度。来自鉴别器的输出用于调整本地振荡器的频率，以便跟踪触摸屏的频率。

2. 发明授权

US06636201B1 Acoustic touchscreen having waveguided reflector arrays 有权
标题翻译：具有波导反射器阵列的声学触摸屏
公开(公告)号：US06636201B1
公开(公告)日：2003-10-21
申请号：US09579584
申请日：2000-05-26
申请人： Paulo Irulegui Gomes , Joel Kent , James L. Aroyan , Shigeki Kambara
发明人： Paulo Irulegui Gomes , Joel Kent , James L. Aroyan , Shigeki Kambara
IPC分类号： G09G500
CPC分类号： G06F3/0436
摘要： An acoustic touchscreen (1a) has transmitting transducers (23a, 23b) for generating acoustic signals which are deflected across a touch-sensitive area (2) by an array 13 of partially acoustically reflective elements 14. A touch on the touch-sensitive area causes a perturbation in the acoustic signals. After traversing the touch-sensitive area, the acoustic signals are redirected by another array 13 of partially acoustically reflective elements 14, towards receiving transducers (26a, 26b), where the signals (and any perturbations) are sensed. To accommodate touchscreens having narrow border regions (15a), the acoustic signals are propagated across the border regions using acoustic waveguides (18). The waveguide confines the acoustic signals to traveling along a narrow path width, but yet permit them to be deflected across the touch-sensitive area. In this manner, the transducers and reflective elements can in turn be of narrower construction and can fit within narrow border regions.
摘要翻译：声学触摸屏（1a）具有用于产生通过部分声学反射元件14的阵列13在触敏区域（2）上偏转的声学信号的发射换能器（23a，23b）。触敏区域上的触摸导致声信号的扰动。在穿过触摸敏感区域之后，声信号由另一个部分声学反射元件阵列13重定向到接收换能器（26a，26b），其中感测到信号（和任何扰动）。为了适应具有窄边界区域（15a）的触摸屏，声信号通过声波导（18）在边界区域传播。波导将声信号限制在沿着窄路径宽度行进，但是允许它们在触敏区域上偏转。以这种方式，换能器和反射元件又可以具有更窄的结构并且可以适合于狭窄的边界区域。

3. 发明授权

US6163313A Touch sensitive screen and method 失效
标题翻译：触摸屏和方法
公开(公告)号：US6163313A
公开(公告)日：2000-12-19
申请号：US989928
申请日：1997-12-12
申请人： James L. Aroyan , Paulo Irulegui Gomes , Joel Kent
发明人： James L. Aroyan , Paulo Irulegui Gomes , Joel Kent
IPC分类号： G06F3/033 , G06F3/045 , G09G5/00
CPC分类号： G06F3/045 , G06F2203/04113
摘要： A position touch sensor having a substrate and a resistive layer disposed on the substrate. At least one pair of electrodes is positioned on the resistive layer. A portion of one electrode is spaced from a portion of another electrode to produce an overlapped resistive region between the spaced portions of the electrodes. An insulating region extends into and terminates in the overlapped resistive region from a resistive region of the resistive layer outside the overlapped resistive region. A method for controlling the flow of current through a resistive layer for converting physical position information on the resistive layer into electrical signals. The method includes determining a dimension of a length of a generally continuous resistive section which is to be located in the resistive layer. The dimension of the length is determined through the use of electrical excitation in the resistive layer. A first insulating region is disposed in the resistive layer to form a first boundary of the generally continuous resistive section. Subsequently and at a distance from the first insulating region essentially equaling the dimension of the length, a second insulating region is disposed in the resistive layer to form a second boundary of the generally continuous resistive section such that current may be conducted through the generally continuous resistive section between the first and second insulating regions.
摘要翻译：一种位置触摸传感器，其具有设置在基板上的基板和电阻层。至少一对电极位于电阻层上。一个电极的一部分与另一个电极的一部分隔开，以在电极间隔开的部分之间产生重叠的电阻区域。绝缘区域从重叠电阻区域外侧的电阻层的电阻区域延伸到并且终止于重叠电阻区域。一种用于控制通过电阻层的电流流动的方法，用于将电阻层上的物理位置信息转换为电信号。该方法包括确定要位于电阻层中的大致连续的电阻部分的长度尺寸。通过在电阻层中使用电激励来确定长度的尺寸。第一绝缘区域设置在电阻层中以形成大致连续的电阻部分的第一边界。随后并且距离第一绝缘区域的距离基本上等于长度的尺寸，在电阻层中设置第二绝缘区域以形成大致连续的电阻部分的第二边界，使得电流可以通过大体上连续的电阻在第一和第二绝缘区域之间。

4. 发明授权

US6091406A Grating transducer for acoustic touchscreens 失效
标题翻译：用于声学触摸屏的光栅传感器
公开(公告)号：US6091406A
公开(公告)日：2000-07-18
申请号：US998051
申请日：1997-12-24
申请人： Shigeki Kambara , Hiroshi Kaneda , Robert Adler , Joel Kent , Bruce W. Maxfield , Masao Takeuchi
发明人： Shigeki Kambara , Hiroshi Kaneda , Robert Adler , Joel Kent , Bruce W. Maxfield , Masao Takeuchi
IPC分类号： G06F3/043 , G06F3/03 , G06F3/033 , G06F3/041 , G09G5/00 , G06K11/14 , G08C21/00
CPC分类号： G06F3/0436
摘要： An acoustic touch sensing device, comprising a substrate, having a surface; and an acoustic wave transducer, transducing a bulk wave in said substrate propagating through said substrate along an axis intersecting said surface, wherein energy of said bulk wave is coupled to a wave having a converted wave mode with appreciable energy at said surface and propagating along said surface. The device may include a set of scattering centers to couple the bulk wave to a Rayleigh wave or plate wave. The Rayleigh wave or plate wave may be dispersed over a region of the substrate, and analyzed to detect a perturbation indicative of a position of touch.
摘要翻译：声学触摸感测装置，包括具有表面的基底; 以及声波换能器，沿着与所述表面相交的轴传播在所述衬底中传播的体波，其中所述体波的能量被耦合到具有在所述表面处具有可观能量的转换波模的波，并且沿着所述表面。该装置可以包括一组散射中心，以将体波耦合到瑞利波或平板波。瑞利波或平板波可以分散在基板的一个区域上，并分析以检测指示触摸位置的扰动。

5. 发明授权

US06297811B1 Projective capacitive touchscreen 失效
公开(公告)号：US06297811B1
公开(公告)日：2001-10-02
申请号：US09324346
申请日：1999-06-02
申请人： Joel Kent , Arie Ravid
发明人： Joel Kent , Arie Ravid
IPC分类号： G09G500
CPC分类号： G06F3/044
摘要： An improved touchscreen utilizing two sets of electrodes that are fabricated in a single plane is provided. The individual electrodes of each set of electrodes are formed from a continuous length of a conductive material. Suitable electrode materials include fine wire and deposited conductive coatings. The overall electrode pattern is such that there is no overlap of electrodes, thus eliminating the need for insulating layers and/or coatings between electrodes. Although a variety of electrode patterns can be used, preferably the pattern is comprised of a plurality of approximately triangularly shaped electrodes, the pattern such that the base of one triangularly shaped electrode is adjacent to the apex of the next triangularly shaped electrode. The preferred triangular shape of an individual electrode can be achieved by forming a continuous loop of the electrode material into the desired shape or by forming a series of teeth of varying height, the envelope of the teeth approximating the desired triangular shape. A touchscreen sensor employing the disclosed sensing electrodes can use any of a variety of readout systems. For example, a frequency-domain readout approach can be used in which the operating frequency is fixed. In this approach a touch capacitance is detected by observing an impedance change at the operating frequency, typically by measuring a corresponding current change. Alternately changes in a RC decay time &tgr; can be measured, for example by observing frequency shifts in a relaxation oscillator. This technique is typically referred to as a time-domain approach. In a third alternate approach, capacitance changes are detected via frequency shifts of LC oscillators. Touch position information is determined from the capacitance changes of the electrodes using any number of different techniques. Preferably prior to calculating position, a subset of electrodes localized around the touch position is determined. Electrode localization reduces the effects of background signals while increasing the efficiency of the position determining algorithm. Once a set of localized electrodes has been determined the touch coordinates are calculated, one coordinate from the distribution of the touch signal within each set of electrodes and the other coordinate from the distribution of the touch signal between the two sets of electrodes.

6. 发明申请

US20050248548A1 Acoustic touch sensor 审中-公开
标题翻译：声学触摸传感器
公开(公告)号：US20050248548A1
公开(公告)日：2005-11-10
申请号：US11106167
申请日：2005-04-13
申请人： Masahiro Tsumura , Joel Kent
发明人： Masahiro Tsumura , Joel Kent
IPC分类号： G09G5/00
CPC分类号： G06F3/0436
摘要： A touch sensor comprises a substrate capable of propagating acoustic waves. The substrate includes a first surface having a touch sensitive region. A transducer is formed on the substrate. The transducer comprises a piezoelectric element which is thermally cured after being formed on the substrate. The transducer is configured for at least one of generating acoustic waves and detecting acoustic waves. Alternatively, the transducer may include a strip comprising the piezoelectric element.
摘要翻译：触摸传感器包括能够传播声波的基板。衬底包括具有触敏区域的第一表面。在基板上形成换能器。换能器包括压电元件，其在形成在基板上之后被热固化。传感器被配置用于产生声波和检测声波中的至少一个。或者，换能器可以包括包括压电元件的条带。

7. 发明授权

US07204148B2 Acoustic wave touch detecting apparatus 有权
标题翻译：声波触摸检测装置
公开(公告)号：US07204148B2
公开(公告)日：2007-04-17
申请号：US10712874
申请日：2003-11-12
申请人： Yoshikazu Tanaka , Joel Kent , James Roney
发明人： Yoshikazu Tanaka , Joel Kent , James Roney
IPC分类号： G01N29/036 , G09G5/00 , G06F3/033 , G01H11/06
CPC分类号： G06F3/0436
摘要： Two groups of inclined lines, which are included in a spurious wave scattering means, are formed at opposite angles with respect to each other in the vicinity of an upper edge of a substrate. The angles of the inclined lines are such that they are close to perpendicular toward the central portion of the substrate, and gradually decrease toward the edges thereof. In a similar manner, two other groups inclined lines, which are also included in the spurious wave scattering means, are formed at opposite angles with respect to each other, with gradually changing angles. The spurious waves that reach these regions are diffuse by the inclined lines, so that they are not propagated to converters (sensors). Three rectangular spurious wave scattering means, formed by inclined lines, inclined at angles other than 45°, also function to diffuse and eliminate spurious waves that propagate along the front surface of the substrate.
摘要翻译：包括在寄生波散射装置中的两组倾斜线在衬底的上边缘附近相对于彼此以相反的角度形成。倾斜线的角度使得它们接近垂直于基板的中心部分，并且朝向其边缘逐渐减小。以类似的方式，还包括在杂散波散射装置中的另外两组倾斜线以相对于彼此具有逐渐变化的角度的相反角度形成。到达这些区域的杂散波被倾斜的线漫射，使得它们不传播到转换器（传感器）。由斜线形成的三个矩形寄生波散射装置，其以45°以外的角度倾斜，还起着扩散和消除沿着衬底前表面传播的寄生波的作用。

8. 发明申请

US20050243071A1 Acoustic touch sensor 有权
标题翻译：声学触摸传感器
公开(公告)号：US20050243071A1
公开(公告)日：2005-11-03
申请号：US11106394
申请日：2005-04-13
申请人： Joel Kent , Paulo Gomes , Robert Adler
发明人： Joel Kent , Paulo Gomes , Robert Adler
IPC分类号： G09G5/00
CPC分类号： G06F3/0436
摘要： A touch sensor comprises a substrate capable of propagating acoustic waves and includes a first surface having a touch sensitive region. A first sidewall intersects the first surface along a first edge. The first edge is configured to propagate a first acoustic wave along the first edge. The first acoustic wave may be a one-dimensional edge wave. A wave converter converts the first acoustic wave to a second acoustic wave, and the first surface is configured to propagate the second acoustic wave across the touch sensitive region.
摘要翻译：触摸传感器包括能够传播声波的基板，并且包括具有触敏区域的第一表面。第一侧壁沿着第一边缘与第一表面相交。第一边缘被配置为沿着第一边缘传播第一声波。第一声波可以是一维边缘波。波变换器将第一声波转换为第二声波，并且第一表面被配置为传播第二声波穿过触敏区域。

9. 发明申请

US20050146514A1 Focusing-shaped reflector arrays for acoustic touchscreens 有权
标题翻译：用于声学触摸屏的聚焦形反射器阵列
公开(公告)号：US20050146514A1
公开(公告)日：2005-07-07
申请号：US10752935
申请日：2004-01-06
申请人： Joel Kent
发明人： Joel Kent
IPC分类号： G06F3/043 , G06F3/033 , G06F3/041 , G09G5/00
CPC分类号： G06F3/0436
摘要： An acoustic touchscreen having a substrate capable of propagating acoustic waves, the substrate having a touch-sensitive area, and an array of acoustically reflective elements lying in or on the substrate are positioned to transmit or receive acoustic signals into or out of the touch-sensitive area, the elements having a focusing shape that provides waveguide functionality, i.e., focusing the acoustic wave energy to a narrow area along a center line of the array axis, without requiring a further waveguide core structure.
摘要翻译：具有能够传播声波的基底的声学触摸屏，具有触敏区域的基底和位于基底中或基底上的声反射元件的阵列被定位成将声信号传输或接收到触敏区域，具有提供波导功能的聚焦形状的元件，即，将声波能量沿着阵列轴线的中心线聚焦到窄区域，而不需要另外的波导芯结构。

10. 发明授权

US06535147B1 Segmented gain controller 有权
标题翻译：分段增益控制器
公开(公告)号：US06535147B1
公开(公告)日：2003-03-18
申请号：US09440991
申请日：1999-11-16
申请人： Tim Masters , Joel Kent
发明人： Tim Masters , Joel Kent
IPC分类号： H03M1100
CPC分类号： G06F3/0436
摘要： A touch screen includes a transmitter capable of delivering an acoustic signal to the touch screen and a receiver adapted to detect acoustic signals on the touch screen and deliver a first signal representative of the detected acoustic signals. An automatic gain control amplifier has an input, output, and control terminal, and is adapted to receive the first signal on the input terminal and deliver an amplified version of the first signal on the output terminal. The control terminal is adapted to receive a control signal that varies the gain of the amplifier. An analog to digital converter is adapted to receive the amplified first signal and deliver a digital representation thereof. A first circuit is adapted to receive one of the amplified first signal and the digital signal, determine the difference between the received signal and a preselected value, and deliver a control signal to the control input of the amplifier. The control signal has a magnitude responsive to the determined difference.
摘要翻译：触摸屏包括能够将声信号传递到触摸屏的发射器和适于检测触摸屏上的声信号并传送代表检测到的声信号的第一信号的接收器。自动增益控制放大器具有输入，输出和控制端子，并且适于在输入端子上接收第一信号，并在输出端子上传送第一信号的放大版本。控制端适于接收改变放大器增益的控制信号。模数转换器适于接收放大的第一信号并传送其数字表示。第一电路适于接收放大的第一信号和数字信号中的一个，确定接收信号与预选值之间的差，并将控制信号传送到放大器的控制输入。控制信号具有响应于确定的差值的幅度。

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