Boundary dispersion for mitigating PWM temporal contouring artifacts in digital displays
    4.
    发明授权
    Boundary dispersion for mitigating PWM temporal contouring artifacts in digital displays 有权
    用于减轻数字显示器中PWM时间轮廓伪影的边界色散

    公开(公告)号:US08717394B2

    公开(公告)日:2014-05-06

    申请号:US12176728

    申请日:2008-07-21

    IPC分类号: G09G5/10 G09G5/02

    摘要: A method and system providing boundary dispersion to pixel values displayed on a binary spatial light modulator to reduce temporal contouring artifacts. Pixel code values are offset from a nominal value when displayed on the SLM to disperse a large bit transition for a pulse width modulation (PWM) system. The offset value varies as a function of the pixel digital code, the pixel spatial location on the screen, and pixel temporal location in time. The set of offsets applied to pixels is varied over a repeating sequence of 2 displayed frames.

    摘要翻译: 一种为二值空间光调制器上显示的像素值提供边界色散以减少时间轮廓伪像的方法和系统。 当显示在SLM上时,像素码值偏离标称值,以分散脉宽调制(PWM)系统的大比特转换。 偏移值根据像素数字码,屏幕上的像素空间位置和时间上的像素时间位置而变化。 应用于像素的偏移集合在2个显示的帧的重复序列上变化。

    Global light boost for pulse width modulation display systems
    5.
    发明授权
    Global light boost for pulse width modulation display systems 失效
    用于脉宽调制显示系统的全局光提升

    公开(公告)号:US06226054B1

    公开(公告)日:2001-05-01

    申请号:US09088644

    申请日:1998-06-02

    IPC分类号: G02F100

    摘要: A method for performing pulse width modulation (PWM) on a binary spatial light modulator using spatial-temporal multiplexing. A 10% light boost is achieved by eliminating deadtimes that are typically generated using the global-reset operation of a DMD when bit-planes having small on times are utilized. The number of bit-planes required is reduced by using a combination of binary and ternary bit-planes to achieve grayscale of a displayed digital image. By using a combination of spatial and temporal processing, digital pixel values can be displayed using a reduced number of bit-planes, without generating perceived artifacts such as pulsing due to pixels being turned on-off from frame to frame.

    摘要翻译: 一种使用空间 - 时间复用在二进制空间光调制器上执行脉宽调制(PWM)的方法。 通过消除通常使用DMD的全局复位操作产生的死时间来实现10%的光增强,当使用具有小的次数的位平面时。 通过使用二进制和三进制位平面的组合来实现所需的位平面的数量以实现所显示的数字图像的灰度。 通过使用空间和时间处理的组合,可以使用减少数量的位平面来显示数字像素值,而不会产生诸如由于像素被逐帧地关闭而产生的脉冲的感觉到的伪像。

    Mitigation of Temporal PWM Artifacts
    6.
    发明申请
    Mitigation of Temporal PWM Artifacts 有权
    减少时间PWM伪影

    公开(公告)号:US20100091040A1

    公开(公告)日:2010-04-15

    申请号:US12419189

    申请日:2009-04-06

    申请人: Daniel J. Morgan

    发明人: Daniel J. Morgan

    IPC分类号: G09G5/10

    摘要: A system and method for reducing pulse width modulation contouring artifacts. Each input intensity value is translated to at least one non-binary bit pattern for display. Many of the input intensity values are translated to at least two alternate non-binary bit patterns. The alternate codes are used to smooth the transition between intensity codes as major bits are turned on. The smoothing occurs by the gradual transition from codes that do not use the major bit to codes that do use the major bit. Typically the alternate codes are selected based on the location of the pixel in a spatial pattern (100) and the alternate codes are spatially alternated from one pixel (102) to the next (104). Other embodiments temporally alternate the codes from one period—typically a frame period—to the next. Still other embodiments alternate the codes both spatially and temporally.

    摘要翻译: 用于减少脉宽调制轮廓假象的系统和方法。 每个输入强度值被转换为至少一个非二进制位模式用于显示。 许多输入强度值被转换为至少两个交替的非二进制位模式。 当主位打开时,替代代码用于平滑强度代码之间的转换。 平滑发生在不使用主要位的代码逐渐过渡到使用主要位的代码。 通常,基于空间图案(100)中的像素的位置来选择替代代码,并且替代代码在空间上从一个像素(102)交替到下一个(104)。 其他实施例在时间上将代码从一个周期(通常是帧周期)交替到下一个周期。 另外其他实施例在空间和时间上交替代码。

    Secondary color boost in sequential color systems
    7.
    发明授权
    Secondary color boost in sequential color systems 有权
    顺序色彩系统中的次级色彩提升

    公开(公告)号:US06567134B1

    公开(公告)日:2003-05-20

    申请号:US09590473

    申请日:2000-06-08

    申请人: Daniel J. Morgan

    发明人: Daniel J. Morgan

    IPC分类号: H04N931

    CPC分类号: H04N9/3123 H04N9/3114

    摘要: A method and system of increasing the intensity of secondary colors in sequential color display systems. The method utilizes light during a transition period between two primary color periods to form a secondary color. The light generated during this transition is generally not used since it does not represent a pure primary color, but instead typically starts as light of a first pure primary and ends as light of a second pure primary. A display controller determines which secondary color is needed, and the amount of the secondary color needed, and enables the transition or spoke light to contribute to the image during a time period appropriate to desired secondary color intensity given the intensity and switching characteristics of the light during the transition period. For example, light (210) filtered by a color wheel (200) during the transitional period (212 to 214) between a red (102) and green (106) filter is used to increase the yellow component of the image. Several optional methods are used to minimize the artifacts created by the spoke light and to adapt the secondary color boost to white-boosting spoke light recapture methods. In general, the spoke periods are used to boost the white level of de-saturated images and to boost the secondary colors of saturated images.

    摘要翻译: 在顺序彩色显示系统中增加次要颜色强度的方法和系统。 该方法在两个原色周期之间的过渡期间利用光来形成次级颜色。 在该转变期间产生的光通常不被使用,因为它不代表纯原色,而是通常以第一纯原子的光开始并以第二纯原子的光结束。 显示控制器确定需要哪个次要颜色和所需的次要颜色的量,并且在给定光的强度和切换特性的情况下,使适应于期望的次级颜色强度的时间段内的转换或辐射光对图像有贡献 在过渡期间。 例如,在红色(102)和绿色(106)过滤器之间的过渡时段(212至214)期间由色轮(200)过滤的光(210)用于增加图像的黄色分量。 使用几种可选的方法来最小化辐条光产生的伪影,并使次级色彩增强适应白色增强辐射光再捕获方法。 通常,辐射周期用于提高去饱和图像的白色电平并提高饱和图像的次要颜色。

    Spoke light recapture in sequential color imaging systems
    8.
    发明授权
    Spoke light recapture in sequential color imaging systems 有权
    在顺序彩色成像系统中发光回收

    公开(公告)号:US06324006B1

    公开(公告)日:2001-11-27

    申请号:US09572470

    申请日:2000-05-17

    申请人: Daniel J. Morgan

    发明人: Daniel J. Morgan

    IPC分类号: G02B2710

    摘要: A method and display system for using the light (110) passing through the spokes of a color wheel (100). The light is a mixed and rapidly changing color. Adding all of the spoke times produces white, but adding a subset creates color artifacts. The spoke times cannot all be added at the same time without altering the white point of the display. The spoke times are added in a sequence and the sequence is altered over time for the same pixel such that the pixel converges to white over time. The pattern of spoke bits is arranged so that as adjacent spoke bit pixels are added, the net spoke light converges to white. The patterns are also varied so that as more and more spoke bit periods are turned on, the net spoke light converges to white. Each spoke bit period adds n-LSBs of white light intensity, so as each spoke bit period is added, n−1 LSBs of white light are subtracted from the white data.

    摘要翻译: 一种用于使用通过色轮(100)的辐条的光(110)的方法和显示系统。 光是混合和快速变化的颜色。 添加所有的辐射时间产生白色,但添加一个子集会产生色彩伪像。 在不改变显示屏的白点的情况下,不能同时添加发言时间。 辐射时间以序列的形式被添加,随着时间的推移,相同像素的序列被改变,使得像素随着时间的推移而趋于白色。 辐射位的图案被布置成使得当相邻的辐条位像素被添加时,净辐射光会聚到白色。 这些图案也是变化的,使得当越来越多的辐条位周期被打开时,网络辐射光会聚到白色。 每个辐条位周期都增加了白光强度的n-LSB,因此每个辐条位周期相加,从白色数据中减去n-1个LSB的白光。

    Spatial-temporal multiplexing for high bit-depth resolution displays
    9.
    发明授权
    Spatial-temporal multiplexing for high bit-depth resolution displays 有权
    用于高位深度分辨率显示的空间复用

    公开(公告)号:US06310591B1

    公开(公告)日:2001-10-30

    申请号:US09370419

    申请日:1999-08-09

    IPC分类号: G09G334

    摘要: A method and apparatus for spatially and temporally multiplexing display data. The use of this method results in a bit-depth resolution higher than that achievable by the system given a number of bits of resolution. The method includes the steps of determining the desired perceived resolution (26), establishing the number of bit-planes to be used to achieve that perceived resolution (28), using at least one of those bit-planes for spatial-temporal least significant bit values (STMLSBs) (30), referencing the developed values of the STMLSBs to fractional bit gray code levels (32), developing spatial patterns (34), determining whether the spatial patterns will start in a predetermined sequence or randomly from frame-to-frame (36), loading the data onto the modulator and displaying it (38). The apparatus includes a random number generator (48) and a look up table (50) to enable the choice between random and predetermined spatial patterns, and pattern logic (46), which produces the pattern to be used.

    摘要翻译: 一种用于空间和时间复用显示数据的方法和装置。 使用这种方法会产生一个位深度分辨率,高于系统给出了许多分辨率位可实现的位深度分辨率。 该方法包括以下步骤:使用用于空间 - 时间最低有效位的这些位平面中的至少一个来确定要用于实现该感知分辨率(28)的位平面的数目的所需感知分辨率(26) 值(STMLSB)(30),将STMLSB的开发值引用到分数位灰度代码级(32),开发空间模式(34),确定空间模式是以预定的顺序开始还是从帧到 帧(36),将数据加载到调制器上并显示它(38)。 该装置包括随机数发生器(48)和查找表(50),以使得能够选择随机和预定的空间模式,以及产生要使用的模式的模式逻辑(46)。

    Mitigation of artifacts in PWM illumination imaging
    10.
    发明授权
    Mitigation of artifacts in PWM illumination imaging 有权
    PWM照明成像中的伪影减轻

    公开(公告)号:US08493419B2

    公开(公告)日:2013-07-23

    申请号:US13466606

    申请日:2012-05-08

    申请人: Daniel J. Morgan

    发明人: Daniel J. Morgan

    IPC分类号: G09G5/10

    摘要: A system and method for reducing pulse width modulation contouring artifacts. Each input intensity value is translated to at least one non-binary bit pattern for display. Many of the input intensity values are translated to at least two alternate non-binary bit patterns. The alternate codes are used to smooth the transition between intensity codes as major bits are turned on. The smoothing occurs by the gradual transition from codes that do not use the major bit to codes that do use the major bit. Typically the alternate codes are selected based on the location of the pixel in a spatial pattern (100) and the alternate codes are spatially alternated from one pixel (102) to the next (104). Other embodiments temporally alternate the codes from one period—typically a frame period—to the next. Still other embodiments alternate the codes both spatially and temporally.

    摘要翻译: 用于减少脉宽调制轮廓假象的系统和方法。 每个输入强度值被转换为至少一个非二进制位模式用于显示。 许多输入强度值被转换为至少两个交替的非二进制位模式。 当主位打开时,替代代码用于平滑强度代码之间的转换。 平滑发生在不使用主要位的代码逐渐过渡到使用主要位的代码。 通常,基于空间图案(100)中的像素的位置来选择替代代码,并且替代代码在空间上从一个像素(102)交替到下一个(104)。 其他实施例在时间上将代码从一个周期(通常是帧周期)交替到下一个周期。 另外其他实施例在空间和时间上交替代码。