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    Display system timing control method
    3.
    发明授权
    Display system timing control method 有权
    显示系统时序控制方法

    公开(公告)号：US07405856B2

    公开(公告)日：2008-07-29

    申请号：US11763838

    申请日：2007-06-15

    Applicant: Donald B. Doherty ,  Daniel J. Morgan

    Inventor： Donald B. Doherty ,  Daniel J. Morgan

    IPC: G02F1/03 ,  G02F1/29 ,  G02F1/00 ,  H04N9/12

    CPC classification number: G09G3/342 ,  G09G3/346 ,  G09G2310/0235 ,  G09G2310/024 ,  G09G2310/08 ,  G09G2320/0626 ,  G09G2360/145 ,  H04N5/7458 ,  H04N9/3114 ,  H04N9/3123 ,  H04N9/3194

    Abstract: A display system includes a light source 110 and a spatial light modulator 122 located to receive light from the light source. The spatial light modulator (e.g., a DMD) includes a number of independently controllable elements that are activated for a period of time to display light of a desired brightness. A light sensor 136 is located to determine a characteristic of light from the light source 110. A control circuit 126 is coupled to the spatial light modulator 122 and controls the period of time that the independently controllable elements are activated. This period of time is based at least in part by an input received from the light sensor 136.

    Abstract translation: 显示系统包括光源110和位置以接收来自光源的光的空间光调制器122。 空间光调制器（例如，DMD）包括多个可独立控制的元件，其被激活一段时间以显示期望亮度的光。 光传感器136被定位以确定来自光源110的光的特性。 控制电路126耦合到空间光调制器122并且控制独立可控元件被激活的时间段。 该时间段至少部分地基于从光传感器136接收的输入。

    Contouring reduction in SLM-based display
    4.
    发明授权
    Contouring reduction in SLM-based display 失效
    基于SLM的显示器轮廓缩减

    公开(公告)号：US06795085B1

    公开(公告)日：2004-09-21

    申请号：US09038219

    申请日：1998-03-11

    Applicant: Donald B. Doherty ,  Gregory S. Pettitt ,  Vishal Markandey ,  Daniel J. Morgan

    Inventor： Donald B. Doherty ,  Gregory S. Pettitt ,  Vishal Markandey ,  Daniel J. Morgan

    IPC: G09G502

    CPC classification number: G09G3/2055 ,  G09G3/2059 ,  G09G3/34

    Abstract: Methods of reducing contouring in images display by a linear display device, such as a spatial light modulator. The methods operate on a high resolution signal, which represents a stream of pixel values. The per pixel resolution of this signal is greater than the per pixel display resolution, and its less significant bits are treated as an error component. Random values are added to the error component either in conjunction with error diffusion values (FIG. 1) or to provide a dither that is directly proportional to the error (FIG. 4), or to provide a dither that has both spatial and temporal contributions (FIG. 5).

    Abstract translation: 通过诸如空间光调制器之类的线性显示装置来减少图像中的轮廓的方法。 该方法在高分辨率信号上操作，其表示像素值流。 该信号的每像素分辨率大于每像素显示分辨率，并且其较低有效位被视为误差分量。 将随机值与误差扩散值（图1）一起添加到误差分量中，或者提供与误差成正比的抖动（图4），或提供具有空间和时间贡献的抖动 （图5）。

    Adaptive temporal modulation of periodically varying light sources
    5.
    发明授权
    Adaptive temporal modulation of periodically varying light sources 有权
    周期性变化的光源的自适应时间调制

    公开(公告)号：US06285491B1

    公开(公告)日：2001-09-04

    申请号：US09467816

    申请日：1999-12-21

    Applicant: Stephen W. Marshall ,  Roger P. Perry ,  Donald B. Doherty

    Inventor： Stephen W. Marshall ,  Roger P. Perry ,  Donald B. Doherty

    IPC: G02B2600

    CPC classification number: G09G3/2033 ,  G09G3/2018 ,  G09G3/2022 ,  G09G3/34 ,  G09G3/3406 ,  G09G3/346 ,  G09G2320/0266 ,  G09G2320/04 ,  G09G2360/145 ,  H04N9/3114 ,  H04N9/3123 ,  H04N9/3155

    Abstract: A controller (800) for a pulse width modulated display system. The controller (800) periodically determining the output of a light source by sampling the output of a light detector (808) an creating a smoothed approximation of the periodic waveform of the light source. A processor (806) in the controller (800) reads a base bit split sequence from a read only memory (804) and modifies the sequence by lengthening or shortening the bit periods described therein in order to compensate for the periodic variations of the light source. The modified bit split sequence is stored in two-port random access memory (802) where it is later accessed by both the processor (806) and a sequencer (304). The sequencer (304) reads the modified bit split sequence from the two-port random access memory (802) to determine when to load each bit of image data into a modulator an-ay. The processor (806) periodically reads the two-port random access memory (802) and further modifies the modified sequence contained therein to reflect additional waveform data collected by the detector (808).

    Abstract translation: 一种用于脉宽调制显示系统的控制器（800）。 控制器（800）通过对光检测器（808）的输出进行采样来周期性地确定光源的输出，产生光源的周期性波形的平滑近似。 控制器（800）中的处理器（806）从只读存储器（804）读取基本位分割序列，并通过延长或缩短其中所述的位周期来修改序列，以便补偿光源的周期性变化 。 修改的比特分离序列被存储在双端口随机存取存储器（802）中，随后由处理器（806）和定序器（304）进行访问。 定序器（304）从双端口随机存取存储器（802）读取经修改的比特分离序列，以确定何时将图像数据的每一位加载到调制器中。 处理器（806）周期性地读取双端口随机存取存储器（802），并进一步修改其中包含的修改序列，以反映由检测器（808）收集的附加波形数据。

    Special features for digital television
    6.
    发明授权
    Special features for digital television 失效
    数字电视的特色功能

    公开(公告)号：US5999227A

    公开(公告)日：1999-12-07

    申请号：US876112

    申请日：1997-06-13

    Applicant: Donald B. Doherty ,  Robert J. Gove ,  John R. Reder

    Inventor： Donald B. Doherty ,  Robert J. Gove ,  John R. Reder

    IPC: H04N5/44 ,  H04N5/45 ,  H04N7/08 ,  H04N7/081 ,  H04N7/26 ,  H04N5/445

    CPC classification number: H04N5/45 ,  H04N7/012

    Abstract: A system for handling special television video features digitally. The system receives incoming broadcast video into a switch (106). The switch allows the viewer to select a main channel and at least one auxiliary channel for viewing as a special feature, if the viewer does not want to view only the main channel for that particular special feature. The main video channel data is processed by a scan converter (216) to convert it from interlaced to progressive scan. A logic device (212) handles the auxiliary channel data to format it into the selected special feature and inputs that data to the scan converter (216) such that the special feature appears in the proper place relative to the main channel image.

    Abstract translation: 数字处理特殊电视录像功能的系统。 系统将进入的广播视频接收到交换机（106）中。 如果观看者不想仅查看该特定特征的主频道，则该开关允许观看者选择主频道和至少一个用于观看的辅助频道作为特殊功能。 主视频通道数据由扫描转换器（216）处理，以将其从隔行扫描转换成逐行扫描。 逻辑设备（212）处理辅助通道数据以将其格式化成所选择的特殊功能，并将该数据输入到扫描转换器（216），使得特殊功能出现在相对于主通道图像的正确位置。

    Color phase control for projection display using spatial light modulator
    7.
    发明授权
    Color phase control for projection display using spatial light modulator 失效
    使用空间光调制器进行投影显示的彩色相位控制

    公开(公告)号：US5657099A

    公开(公告)日：1997-08-12

    申请号：US510027

    申请日：1995-08-01

    Applicant: Donald B. Doherty ,  Richard C. Meyer ,  Stephen W. Marshall ,  Jefferey B. Sampsell ,  Robert J. Gove

    Inventor： Donald B. Doherty ,  Richard C. Meyer ,  Stephen W. Marshall ,  Jefferey B. Sampsell ,  Robert J. Gove

    IPC: H04N9/31 ,  H04N9/12

    CPC classification number: H04N9/3179 ,  H04N9/3114 ,  G09G2310/0235

    Abstract: A SLM-based projection display system (10) samples and processes video data for delivery to a spatial light modulator (SLM) (13c), and uses a color wheel (14a) to color the SLM-generated images. A frame memory (13b) provides data to the SLM (13c) and is managed so that, if the phase of the incoming video signal changes, a desired phase relationship between the color wheel position and the data available to the SLM (13c) can be maintained. Also, a motor control unit (15a) uses a horizontal sync signal to generate a drive signal for the color wheel motor (16a), which limits the transient time during phase-changing events, and which provides a means for adjusting the phase of the drive signal.

    Abstract translation: 基于SLM的投影显示系统（10）对用于传送到空间光调制器（SLM）（13c）的视频数据进行采样和处理，并使用色轮（14a）对SLM生成的图像进行着色。 帧存储器（13b）向SLM（13c）提供数据并被管理，使得如果输入视频信号的相位改变，则色轮位置和可用于SLM（13c）的数据之间的期望的相位关系可以 保持。 此外，电动机控制单元（15a）使用水平同步信号来生成用于色轮电动机（16a）的驱动信号，这限制了相变事件期间的瞬时时间，并且其提供了用于调整 驱动信号。

    Pulse width modulation sequence generation
    10.
    发明授权
    Pulse width modulation sequence generation 有权
    脉宽调制序列生成

    公开(公告)号：US06967759B2

    公开(公告)日：2005-11-22

    申请号：US10335313

    申请日：2002-12-31

    Applicant: Gregory J. Hewlett ,  Donald B. Doherty

    Inventor： Gregory J. Hewlett ,  Donald B. Doherty

    IPC: G09G3/20 ,  G09G3/34 ,  G09G5/02 ,  H04N9/31 ,  G02F1/03 ,  G02F1/07

    CPC classification number: G09G3/342 ,  G09G3/2022 ,  G09G3/34 ,  G09G3/3413 ,  G09G5/02 ,  G09G2310/0235 ,  G09G2310/024 ,  G09G2310/061 ,  G09G2310/08 ,  H04N9/3117

    Abstract: A system and method for addressing and synchronizing a spatial light modulator (SLM) device and a scrolling color recovery (SCR) illumination system. This method applies all the colors to a single SLM simultaneously and recaptures light rejected by the color filters. The recaptured light is reapplied to the color filters and, if passed by the color filter, directed to the SLM. The SCR concept requires multiple colors to be imaged on to an SLM array simultaneously. As the color bands scroll across the SLM, the data applied to elements of the SLM changes to remain appropriate for the color being received by that element. The data applied to the SLM elements may be loaded into the SLM by reset ground with each reset group load delayed by a skew time relative to the previous group.

    Abstract translation: 用于寻址和同步空间光调制器（SLM）设备和滚动颜色恢复（SCR）照明系统的系统和方法。 该方法将所有颜色同时应用于单个SLM，并重新捕获由滤色片拒绝的光。 重新捕获的光被重新应用于滤色器，并且如果通过滤色器被引导到SLM。 SCR概念要求将多种颜色同时映像到SLM阵列上。 当色带在SLM上滚动时，应用于SLM的元素的数据将更改为对该元素接收的颜色保持适当。 应用于SLM元件的数据可以通过复位接地加载到SLM中，每个复位组负载相对于先前组延迟了一个偏移时间。

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