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    • 5. 发明授权
    • Adaptive frequency touchscreen controller using intermediate-frequency signal processing
    • 自适应频率触摸屏控制器采用中频信号处理
    • US06396484B1
    • 2002-05-28
    • US09408818
    • 1999-09-29
    • Robert AdlerArie RavidGeoffrey D. Wilson
    • Robert AdlerArie RavidGeoffrey D. Wilson
    • G09G500
    • G06F3/0436
    • 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.
    • 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。
    • 6. 发明授权
    • Sparkle-free color display
    • 无闪烁彩色显示
    • US5039907A
    • 1991-08-13
    • US298540
    • 1989-01-17
    • Robert Adler
    • Robert Adler
    • H01J29/89
    • H01J29/896
    • A color display is disclosed that has on an inner display surface a periodic pattern of luminescent deposits having a smallest deposit-to-adjacent-deposit pitch "P-D". The display has on an outer surface glare reduction means in the form of an undulating periodic pattern of light-scattering elements whose smallest element-to-adjacent-element pitch "P-E" is significantly less than the pitch "P-D" to avoid moire effects, but significantly greater than the longest wavelength of visible light to minimize diffraction effects. The color display according to the invention may comprise a color cathode ray tube havbing a touch panel on its front surface.
    • 公开了一种彩色显示器,其在内部显示表面上具有具有最小沉积物到相邻沉积间距“P-D”的发光沉积物的周期性图案。 该显示器具有外表面的眩光减少装置,其形式为光散射元件的波形周期性图案的形式,其最小元件相邻元件间距“PE”明显小于间距“PD”以避免波纹效应, 但明显大于可见光的最长波长以最小化衍射效应。 根据本发明的彩色显示器可以包括在其前表面上覆盖触摸面板的彩色阴极射线管。
    • 7. 再颁专利
    • Touch control system for controllable apparatus
    • 用于可控设备的触摸控制系统
    • USRE33151E
    • 1990-01-23
    • US339564
    • 1989-04-17
    • Robert Adler
    • Robert Adler
    • G06F3/033
    • G06F3/0436
    • A system for recognizing touch positions along an axis on a surface associated with a touch control apparatus comprises a substrate having a surface capable of propagating surface acoustic waves and so characterized that a touch on that surface causes a perturbation of a surface wave passing through the region of touch. An input surface wave transducer coupled to the substrate surface launches a burst of surface waves on the surface. An output surface wave transducer coupled to the substrate detects received surface waves. Wave redirecting gratings derive wave components from the launched wave and redirect them across the substrate surface to the output transducer. The wave components are caused to traverse the axis along a progression of paths associated with different touch positions along the axis. Circuitry coupled to the input and output transducers initiates surface wave bursts across the substrate surface and detects tough-induced perturbations of the received waves indicative of the location of a touch along the axis.
    • 8. 发明授权
    • Tough control arrangement for graphics display apparatus
    • 用于图形显示装置的粗糙控制装置
    • US4700176A
    • 1987-10-13
    • US698306
    • 1985-02-05
    • Robert Adler
    • Robert Adler
    • G06F3/033H04L1/00G06F3/02
    • G06F3/0436
    • A system for recognizing touch positions along a coordinate axis on a surface associated with a touch control apparatus comprises a substrate having a surface capable of propagating surface acoustic waves and is so characterized that a touch on that surface causes a partial absorption of energy of a surface wave passing through the region of touch. An input surface wave transducer coupled to the surface launches a burst of surface waves on the surface in a first direction parallel to the axis. An output surface wave transducer coupled to the surface receives the burst of surface waves. A first surface wave reflecting arrangement derives wave components from the launched wave and reflects them across the surface to a second wave reflecting arrangement that redirects the reflected components in a direction opposited the first direction. The reflecting arrangements collectively cause wave components to traverse the surface orthogonally to the coordinate axis along a progression of paths associated with different positions along that axis. Circuitry coupled to the input and output trnasducers initiate surface wave bursts across the substrate surface as well as dsetect touch-induced damping of the received waves. A detector serves to develop an electrical signal representative of the time occurrence of the damping and thus an indication of which of the plurality of paths was traversed by the touch-damped wave and thereby the location of the touch on the substrate surface.
    • 用于在与触摸控制装置相关的表面上沿着坐标轴识别触摸位置的系统包括具有能够传播表面声波的表面的基板,并且其特征在于,该表面上的触摸引起表面的能量的部分吸收 波浪通过触摸区域。 耦合到表面的输入表面波换能器在平行于轴线的第一方向上在表面上发射一阵阵表面波。 耦合到表面的输出表面波传感器接收表面波的突发。 第一表面波反射装置从发射波导出波分量并将它们反射到表面上到第二波反射装置,其将反射分量在与第一方向相反的方向上重定向。 反射装置共同地使波形分量沿着与沿着该轴线的不同位置相关联的路径的进程垂直于坐标轴线的横截面。 耦合到输入和输出trnasducer的电路引发穿过衬底表面的表面波脉冲以及接收波的dsetect触摸诱导阻尼。 检测器用于产生表示阻尼的时间出现的电信号,并且因此显示多个路径中的哪个路径被触摸阻尼波穿过,从而指示基板表面上的触摸位置。
    • 9. 发明授权
    • Dot matrix printhead driver
    • 点阵打印头驱动程序
    • US4242004A
    • 1980-12-30
    • US022412
    • 1979-03-21
    • Robert Adler
    • Robert Adler
    • B41J2/275B41J3/10
    • B41J2/275
    • A driver mechanism for a dot matrix printhead, including an electromagnet, an armature, and a print impact element connected to the armature by a cantilever spring, energization of the electromagnet and consequent movement of the armature to closed position driving the impact element to impact a record sheet supported on a platen; a concentrated mass load is mounted on the spring, sufficient to maintain the impact element essentially in its rest position during a substantial portion of the armature movement so that the force/travel characteristic of the spring governs movement of the impact element, with maximum force at the outset and near zero or zero force at impact. Energization of the electromagnet is interrupted when the armature closes, and a shunt circuit holds the armature closed until just before impact.
    • 用于点阵打印头的驱动机构,包括电磁体,电枢和通过悬臂弹簧连接到电枢的打印冲击元件,电磁体的通电以及随后的电枢到关闭位置的驱动冲击元件的冲击 记录纸支撑在压板上; 集中的质量负载安装在弹簧上,足以在电枢运动的大部分期间将冲击元件基本上保持在其静止位置,使得弹簧的力/行进特性控制冲击元件的运动,以最大的力 冲击时的开始和接近零或零力。 当电枢闭合时,电磁体的通电中断,并且分流回路将衔铁保持在紧靠冲击之前。