会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Method and apparatus for calibrated digital printing using a four by
four transformation matrix
    • 使用四乘四变换矩阵校准数字打印的方法和装置
    • US5508826A
    • 1996-04-16
    • US53638
    • 1993-04-27
    • William J. LloydJohn D. MeyerKing-Wah W. Yeung
    • William J. LloydJohn D. MeyerKing-Wah W. Yeung
    • B41J2/525B41J2/21B41M1/14H04N1/034H04N1/23H04N1/60H04N1/50H04N1/56
    • H04N1/6033
    • A Self Calibrating Color Printer. The present invention enables color printers to accurately reproduce color images despite variations in ink, paper or the printing system. The calibrated printer includes a movable optical sensor assembly which first calibrates itself by measuring an included known color gamut located within the movement range of the sensor assembly. Once calibrated, the sensor assembly measures a color print test pattern newly printed by a movable color print head of the printer. An analog-to-digital converter transforms electrical signals from the sensor assembly to sensor values in digital form, enabling a printer control processor to process the measured data, thereby producing two look-up tables stored in memory: first, a color correction look-up table which adjusts image color values to account for the ink/paper variations, and second, an error diffusion look-up table which spreads color value errors at a given pixel to its neighbors. Once the printer control processor creates these two look-up tables and, the printer is able to process image data, and control the print head via its associated print head electronics to faithfully reproduce the image onto paper. The moveable sensor and associated gamut and print test pattern of the present invention provide an accurate, inexpensive and durable apparatus for calibrating any digital color printer. The Self Calibrating Color Printer disclosed and claimed in this patent applications provides an advanced, accurate and relatively inexpensive instrument for true reproduction of detailed color images.
    • 自校准彩色打印机。 本发明使得彩色打印机能够准确地再现彩色图像,尽管在墨水,纸张或打印系统中有变化。 经校准的打印机包括可移动光学传感器组件,该组件首先通过测量位于传感器组件的移动范围内的包括的已知色域来自行校准。 一旦校准,传感器组件测量由打印机的可移动彩色打印头新印刷的彩色印刷测试图案。 模拟 - 数字转换器将来自传感器组件的电信号以数字形式转换为传感器值,使打印机控制处理器能够处理测量数据,从而产生存储在存储器中的两个查找表:首先, 调整图像颜色值以解决墨水/纸张变化,第二,误差扩散查找表,其将给定像素处的颜色值误差扩展到其邻居。 一旦打印机控制处理器创建了这两个查找表,并且打印机能够处理图像数据,并且通过其关联的打印头电子设备来控制打印头,以将图像忠实地再现到纸上。 本发明的可移动传感器和相关联的色域和打印测试图案提供了用于校准任何数字彩色打印机的精确,便宜且耐用的设备。 在本专利申请中公开和要求保护的自校准彩色打印机提供了用于真实再现详细彩色图像的先进,精确和相对便宜的仪器。
    • 5. 发明授权
    • Circuit and method for correcting distortion in a digital audio system
    • 用于校正数字音频系统中的失真的电路和方法
    • US4764938A
    • 1988-08-16
    • US436195
    • 1982-10-25
    • John D. Meyer
    • John D. Meyer
    • H03H17/00H03H17/08H04B3/14H03H7/30
    • H04B3/147
    • A circuit and method are provided to compensate for the non-linear delay characteristics of a digital audio system introduced by the systems anti-aliasing filter. The circuit and method provide for introducing time delay to the digital system at the low and mid range frequencies, and adding decreasing amounts of time delay at the high frequency ranges to produce an overall composite time delay for the digital system which is relatively constant over its operating frequency range. The delay equalizer used to achieve such delay compensation is made up of active delay equalizer sections which are non-interactive, and which are independently tunable in terms of each sections center frequency and Q. An active delay equalizer section with a second order bandpass transfer functions has been devised to achieve this capability. It is comprised of an operational amplifier having input resistance and feedback resistance connected to its inverting input and a twin-T network connected in its non-inverting input. The twin-T is a driven twin-T for variable Q, and provides a delay equalizer wherein the time delay of each section can readily be tailored to the designers requirements.
    • 提供电路和方法来补偿由系统抗混叠滤波器引入的数字音频系统的非线性延迟特性。 该电路和方法提供了在低频和中频范围向数字系统引入时间延迟,并且在高频范围内增加了减少的时间延迟量,以产生数字系统的整体复合时间延迟,该时间延迟相对于其相对恒定 工作频率范围。 用于实现这种延迟补偿的延迟均衡器由非交互式的有源延迟均衡器部分组成,并且可以根据每个部分的中心频率和Q独立地调节。具有二阶带通传递函数的有源延迟均衡器部分 已经设计出来实现这一功能。 它包括具有连接到其反相输入的输入电阻和反馈电阻的运算放大器和连接在其非反相输入端的双T网络。 双T是用于变量Q的驱动双T,并且提供延迟均衡器,其中每个部分的时间延迟可以容易地根据设计者的要求而定制。
    • 6. 发明授权
    • Horn speaker and method for producing low distortion sound
    • 喇叭和喇叭产生低失真声音的方法
    • US4152552A
    • 1979-05-01
    • US871708
    • 1978-01-23
    • John D. Meyer
    • John D. Meyer
    • G10K9/02G10K9/13H04R1/30H04R9/06
    • H04R1/30G10K9/13
    • An acoustical horn speaker for producing low distortion sound comprised of a casing assembly having a voice coil gap and a magnetic source and return circuit for providing a constant magnetic field across the gap, a current-carrying voice coil disposed in said gap, and a voice diaphragm in rigid attachment with the voice coil, said voice diaphragm being suspended from the casing assembly by a relatively flexible, high compliance suspension member. An acoustical horn having a throat resistance sufficiently high to substantially dominate the radiation resistance of the diaphragm is air coupled at its throat end to the voice diaphragm suspended from said casing, while the compliance of the voice diaphragm suspension is relatively high such that in the presence of the dominating throat resistance of the horn the diaphragm vibratory movement is characterized by substantially force determinative excursions as opposed to substantially linear constant displacement excursions.A method of producing low distortion sound in a horn type speaker comprising the step of driving the speaker's diaphragm in a vibratory movement characterized by substantially force determinative excursions as opposed to substantially linear constant displacement excursions.
    • 一种用于产生低失真声音的声喇叭扬声器,包括具有音圈间隙的壳体组件和用于在间隙上提供恒定磁场的磁源和返回电路,设置在所述间隙中的载流音圈和声音 隔膜与音圈刚性连接,所述隔音板通过相对柔性的高顺应悬挂构件从壳体组件悬挂。 具有足够高的咽喉电阻以基本上支配隔膜的辐射电阻的声喇叭在其喉部端部与从所述壳体悬挂的声音隔膜空气耦合,而声膜悬浮液的顺应性相对较高,使得在存在 对于喇叭的主要喉咙阻力,振膜振动运动的特征在于基本上是力确定的偏移,而不是基本上线性的恒定位移偏移。
    • 10. 发明申请
    • LOUDSPEAKER WITH PASSIVE LOW FREQUENCY DIRECTIONAL CONTROL
    • 具有被动低频方向控制的扬声器
    • US20100254558A1
    • 2010-10-07
    • US12727788
    • 2010-03-19
    • John D. MeyerJean Pierre MaminPablo EspinosaPeter Kowalczyk
    • John D. MeyerJean Pierre MaminPablo EspinosaPeter Kowalczyk
    • H04R1/20
    • H04R1/323H04R1/288H04R1/347
    • A loudspeaker is provided that passively achieves a directional polar response at low frequencies with a high degree of attenuation between the front and the back of the loudspeaker. The loudspeaker 11 has a transducer 13, an enclosure 21 behind the transducer, and port openings 29 in the sidewalls 23 of the enclosure to allow a back-wave produced by the transducer to exit the enclosure and combine with the front wave produced by the transducer. Cancellation behind the loudspeaker at low frequencies is achieved by delaying the back wave with low loss. Low loss delay at low frequencies is achieved by inserting a low-density fibrous fill material 33 in the acoustic chamber 27 formed behind the transducer 13 by the enclosure 21. A fibrous material is selected having a low-pass transfer function and low acoustic loss in its low-frequency pass band.
    • 提供了一种扬声器,其被动地在低频处实现定向极性响应,并且在扬声器的前后之间具有高度衰减。 扬声器11具有换能器13,换能器后面的外壳21和外壳侧壁23中的端口29,以允许由换能器产生的反向波从外壳排出并与由换能器产生的前波相结合 。 扬声器背后的低频消除是通过以低损耗延迟后波来实现的。 通过将低密度纤维填充材料33插入到通过外壳21形成在换能器13后面的声学室27中来实现低频下的低损耗延迟。选择具有低通传递函数和低声损失的纤维材料 其低频通带。