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    • 2. 发明授权
    • Stroke writing character generator with reduced bandwidth
    • 笔画字符发生器,带宽降低
    • US4595918A
    • 1986-06-17
    • US528834
    • 1983-09-02
    • Jay R. Dettmer
    • Jay R. Dettmer
    • G09G1/08G09G1/10
    • G09G1/08
    • A stroke writing character generator pauses between the generation of vectors, which may meet at sharp corners, so as to reduce deflection bandwidth. A stroke state machine having a plurality of states controls the generation of the vectors. The plurality of states includes a time pause state. A vector length counter provides an end of vector signal that causes the stroke state machine to enter the time pause state for inserting a time pause between the generation of the vectors. The video of the CRT on which the vectors are written is blanked in coincidence with the time pause.
    • 行程写入字符发生器在可能在尖角处遇到的矢量的生成之间暂停,以便减少偏转带宽。 具有多个状态的行程状态机控制向量的生成。 多个状态包括时间暂停状态。 矢量长度计数器提供矢量信号的结束,使得笔划状态机进入时间暂停状态,以便在矢量的产​​生之间插入时间暂停。 写入向量的CRT的视频与时间暂停一致地消隐。
    • 4. 发明授权
    • Display control system
    • 显示控制系统
    • US4369441A
    • 1983-01-18
    • US188288
    • 1980-09-18
    • Louis Wohlmuth
    • Louis Wohlmuth
    • G09G1/08G09G1/10
    • G09G1/08
    • A random refresh vector-generator type display system using a hybrid digital/analog vector generating technique. A digital vector generator decomposes medium length vectors into sub-vectors which are then drawn by an analog vector generator including a delay line. The system utilizes a long vector drawing technique wherein the first portion of a long vector is drawn at a first speed, the middle portion is drawn at a greater speed, and the final portion is drawn at the first speed. A feed forward circuit compensates for the sluggish response of deflection amplifiers of a display monitor so as to more precisely define beginning and end points of vectors. These amplifiers are further compensated by a delta theta circuit which temporarily freezes the system clock to allow the amplifier time to settle so that successive vectors will form sharp corners.
    • 一种使用混合数字/模拟矢量生成技术的随机刷新矢量 - 发生器型显示系统。 数字向量生成器将中等长度向量分解成子矢量,然后由包括延迟线的模拟矢量生成器绘制。 该系统利用长矢量绘图技术,其中长矢量的第一部分以第一速度被绘制,中间部分以更大的速度被绘制,并且最终部分以第一速度被拉伸。 前馈电路补偿显示监视器的偏转放大器的缓慢响应,以便更准确地定义矢量的起点和终点。 这些放大器进一步由deltaθ电路进行补偿,该电路临时冻结系统时钟以允许放大器时间稳定,使得连续的矢量将形成锐角。
    • 5. 发明授权
    • Vector generator
    • 矢量发生器
    • US4027148A
    • 1977-05-31
    • US612045
    • 1975-09-10
    • Lawrence David Rosenthal
    • Lawrence David Rosenthal
    • G09G1/08G06F15/34G06F3/14
    • G09G1/08
    • A vector generator having a digital input and a cathode ray tube (CRT) display output is disclosed. Digital values specifying the initial point of the line segment in Cartesian coordinates are converted to proportional voltages applied across the capacitors of two identical resistance-capacitance networks which control the positioning of the CRT beam. A second pair of digital values defining the length and direction of the line segment with respect to the initial point are normalized digitally by left shifts until the larger of the pair equals or exceeds a normalization constant. The normalized values are added to the initial point coordinates, and the sums are then converted to proportional voltages applied to the resistors of the two networks. Simultaneously, a timer preset during the normalization operation is started and the CRT beam is turned on to start the drawing of the line segment. As a result of the normalization, the voltages applied to the RC networks are larger than needed to draw the segment. Consequently, the beam will be turned off by the timer well before the outputs of the RC networks reach the applied voltages. Thus, line segments of widely differing lengths are drawn at a normalized fast rate and are displayed at a normalized uniform visual intensity on the CRT.
    • 公开了一种具有数字输入和阴极射线管(CRT)显示输出的矢量发生器。 指定笛卡尔坐标中线段的初始点的数字值被转换为施加在两个相同电阻 - 电容网络的电容器上的比例电压,这两个电阻 - 电容网络控制CRT光束的定位。 定义相对于初始点的线段的长度和方向的第二对数字值通过左移进行数字归一化,直到该对中的较大者等于或超过归一化常数。 归一化值被添加到初始点坐标,然后将这些和转换成施加到两个网络的电阻器的比例电压。 同时,在归一化操作期间预设的定时器开始并且CRT光束被接通以开始绘制线段。 作为归一化的结果,施加到RC网络的电压大于绘制段所需的电压。 因此,在RC网络的输出达到施加的电压之前,光束将被定时器关闭。 因此,长度不同的线段以归一化的快速绘制,并以CRT上的归一化均匀视觉强度显示。
    • 7. 发明授权
    • Vector computing system as for use in a matrix computer
    • 用于矩阵计算机的矢量计算系统
    • US3684876A
    • 1972-08-15
    • US3684876D
    • 1970-03-26
    • EVANS & SUTHERLAND COMPUTER CO
    • SUTHERLAND IVAN E
    • G06F17/16G09G1/08G06F7/385G06F7/38
    • G06F17/16G09G1/08
    • A computing structure is disclosed for vector computation which structure is adaptable to accomplish mathematical solutions by iterative computation. Specifically, the structure includes first and second register means each of which is capable of registering a vector comprising a plurality of distinct components. Arithmetic means, e.g. a plurality of adders, is connected to each of the register means, for performing an arithmetic combination, e.g. determining the average value of similar components from the two register means. After each cycle, the arithmetic means transfers the results of its operative selectively to one or the other of the register means in accordance with the operation of a control unit. Control may be based upon a sequence of binary bits from an external source, or the signs or other signals developed in the course of computation or a combination thereof.
    • 公开了一种用于矢量计算的计算结构,该结构适用于通过迭代计算完成数学解。 具体地,该结构包括第一和第二寄存器装置,每个寄存器装置能够记录包括多个不同分量的矢量。 算术手段,例如 多个加法器连接到每个寄存器装置,用于执行算术组合。 确定来自两个寄存器装置的类似组件的平均值。 在每个周期之后,算术装置根据控制单元的操作将其操作的结果选择性地传送到寄存器装置中的一个或另一个。 控制可以基于来自外部源的二进制位序列,或者在计算过程中产生的符号或其他信号或其组合。
    • 10. 发明授权
    • Display windowing by clipping
    • 通过剪辑显示窗口
    • US3639736A
    • 1972-02-01
    • US3639736D
    • 1969-11-19
    • IVAN E SUTHERLAND
    • SUTHERLAND IVAN E
    • G06T15/10G09G1/08G06F7/38
    • G09G1/08G06T15/10
    • A computation system is disclosed, as for interpolating lines with specific application to the selection of a portion of a line which is to be presented in a fragmentary display. The system as disclosed eliminates those portions of lines that are contained within a drawing (as defined in computer storage) which lie outside a rectangular ''''window'''' (defining a portion of the drawing) by computing vector coordinates for the terminal ends (start and end) of the visible portions of each such lines. The described embodiment utilizes a binary system of shifting coordinate differential data to clip and divide the lines which are defined by their end points. Repetitive operations attain the desired definition.
    • 公开了一种计算系统,用于将具有特定应用的线插入到要在片段显示中呈现的线的一部分的选择。 所公开的系统通过计算终端的开始和结束的矢量坐标(开始和结束)来消除包含在位于矩形“窗口”之外的图形(定义在计算机存储器中)的线的部分(定义图形的一部分) )每个这样的线的可见部分。 所描述的实施例利用移动坐标差分数据的二进制系统来剪切和分割由其端点定义的线。 重复操作达到所需的定义。