Alignment for display having multiple spatial light modulators
    1.
    发明授权
    Alignment for display having multiple spatial light modulators 失效
    具有多个空间光调制器的显示器对准

    公开(公告)号:US5729245A

    公开(公告)日:1998-03-17

    申请号:US403532

    申请日:1995-03-14

    摘要: A method and structure for a display system having multiple spatial light modulators (SLMs) (16), each of which contributes an image of one color that is perceived by the viewer as a combined image. The SLMs (16) have more rows and columns of pixel elements (42) than rows or columns of pixel data to be displayed. A window of "active" pixel elements (42) can be shifted up and down or right and left by selecting which pixel elements (42) are to receive data. The addressing circuit (31, 31a, 35, 35a) of each SLM 16 can be controlled so as to accomplish this shifting.

    摘要翻译: 一种具有多个空间光调制器(SLM)(16)的显示系统的方法和结构,每个空间光调制器(16)将观看者感知到的一种颜色的图像作为组合图像。 SLM(16)具有比要显示的像素数据的行或列更多的行和列像素元素(42)。 通过选择哪些像素元素(42)来接收数据,可以向上或向下或向左或向右移动“活动”像素元素(42)的窗口。 可以控制每个SLM 16的寻址电路(31,3a,35,35a),以实现这种移位。

    On-line laser alignment system for three dimensional display
    3.
    发明授权
    On-line laser alignment system for three dimensional display 失效
    在线激光对准系统,用于三维显示

    公开(公告)号:US5867152A

    公开(公告)日:1999-02-02

    申请号:US615070

    申请日:1996-03-14

    申请人: Gary L. Sextro

    发明人: Gary L. Sextro

    摘要: A 3D display having a closed loop feedback system dynamically adjusting the scanning pattern of laser beams on-line to maintain pointing errors of all scanned images to a specified tolerance. A predetermined alignment pattern, preferably a matrix of dots with known coordinates, is periodically injected into the image data path, preferably during non-display periods. A grid is disposed on each of two mirrors which enter into two separate light paths and are scanned. The mirrors reflect the laser beams from the grid to an optical sensor for each beam, each sensor connected to an A/D converter and producing an output proportional to the intensity of the reflected light. The sensor output is an analog function of the light intensity impinging thereon. The digitized values are stored in a grid buffer which accumulates an entire intensity pattern of grid points. The the intensity data is collected for offset and gain beams separately and the x and y centroid is computed for the gain and offset grid and used to compute adjustment values for the offset, gain and power intensity of the normal data values sent to the optics. A reference intensity sets the nominal value to which the loop corrects. The adjustment values are applied to the display data before being sent to the optics and are applied to the predetermined alignment pattern, allowing the loop to close to a specified accuracy, depending upon loop bandwidth and time constant. A linearity lookup value is applied to the display data to compensate for any fixed nonlinearity in the data path due to optics or fabrication errors.

    摘要翻译: 具有闭环反馈系统的3D显示器在线动态调整激光束的扫描图案,以将所有扫描图像的指示误差维持在指定的公差。 优选地,在非显示周期期间,预定的对准图案,优选具有已知坐标的点的矩阵被周期性地注入到图像数据路径中。 在两个反射镜中的每一个上设置格栅,其进入两个分开的光路并被扫描。 反射镜将来自网格的激光束反射到每个光束的光学传感器,每个传感器连接到A / D转换器并产生与反射光强度成比例的输出。 传感器输出是照射在其上的光强度的模拟功能。 数字化值存储在网格缓冲器中,该网格缓冲器累积网格点的整个强度图案。 分别为偏移和增益光束收集强度数据,并为增益和偏移网格计算x和y重心,并用于计算发送到光学器件的正常数据值的偏移,增益和功率强度的调整值。 参考强度设置循环修正的标称值。 在发送到光学器件之前,将调整值应用于显示数据,并且根据环路带宽和时间常数将其应用于预定的对准图案,允许环路接近指定的精度。 将线性查找值应用于显示数据,以补偿由于光学或制造误差导致的数据路径中的任何固定非线性。