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    • 3. 发明授权
    • Dynamic focus adjusting voltage generating circuit
    • 动态聚焦调整电压发生电路
    • US5043638A
    • 1991-08-27
    • US436714
    • 1989-11-15
    • Shigeo Yamashita
    • Shigeo Yamashita
    • H04N3/26
    • H04N3/26
    • A dynamic focus adjusting voltage generating circuit for generating a dynamic focus adjusting voltage to be applied to a CRT for displaying images. The circuit includes a horizontal output circuit for supplying a sawtooth wave current to the horizontal deflection coil of the CRT, and a series circuit connected in parallel with the terminals of the horizontal output circuit and consisting of a capacitor and an inductance coil connected in series with each other. An electric potential developed at a node between the capacitance and the inductance coil is used as the dynamic focus adjusting voltage.
    • 一种动态聚焦调整电压产生电路,用于产生要施加到用于显示图像的CRT的动态聚焦调节电压。 该电路包括用于向CRT的水平偏转线圈提供锯齿波电流的水平输出电路,以及与水平输出电路的端子并联连接的串联电路,由电容器和电感线圈串联连接 彼此。 在电容和电感线圈之间的节点处产生的电位用作动态焦点调整电压。
    • 8. 发明授权
    • Semiconductor laser device
    • 半导体激光器件
    • US4257011A
    • 1981-03-17
    • US929013
    • 1978-07-28
    • Michiharu NakamuraShigeo YamashitaTakao KurodaJun-ichi Umeda
    • Michiharu NakamuraShigeo YamashitaTakao KurodaJun-ichi Umeda
    • H01S5/12H01S5/223H01S3/19
    • H01S5/12H01S5/2232H01S5/2234
    • A semiconductor laser device has stabilized longitudinal and transverse modes without excess optical noise for a modulated signal generated by mode interaction. The fundamental construction of the semiconductor laser device comprises a structure wherein a first semiconductor layer is sandwiched between second and third semiconductor layers which have a greater band gap and lower index of refraction than the first semiconductor layer. That region of at least one of the second and third semiconductor layers which is remote from the first semiconductor layer corresponds substantially to a radiation region and serves as a light non-absorptive region in the shape of a stripe. A semiconductor layer has portions lying on both sides of the semiconductor layer remote from the first semiconductor layer and has an effective complex refractive-index for laser light discontinuous at both ends of the semiconductor layer remote from the first semiconductor layer. Periodic corrugations which intersect orthogonally to the lengthwise direction of the stripe-shaped light non-absorptive region are formed in at least one interface of the semiconductor layers in a manner to include at least a region corresponding to the light non-absorptive region.
    • 半导体激光器件对于通过模式相互作用产生的调制信号具有稳定的纵向和横向模式而没有过多的光学噪声。 半导体激光器件的基本结构包括其中第一半导体层夹在具有比第一半导体层更大的带隙和较低的折射率的第二和第三半导体层之间的结构。 远离第一半导体层的第二和第三半导体层中的至少一个的区域基本上对应于辐射区域,并且用作条纹形状的光非吸收区域。 半导体层具有位于远离第一半导体层的半导体层的两侧的部分,并且对于远离第一半导体层的半导体层的两端处的不连续的激光具有有效的复合折射率。 以至少包括对应于光非吸收区域的区域的方式,在半导体层的至少一个界面中形成与条形光非吸收区域的长度方向垂直相交的周期波纹。