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    • 6. 发明授权
    • Current/voltage mode image sensor with switchless active pixels
    • 具有无开关有源像素的电流/电压模式图像传感器
    • US07924332B2
    • 2011-04-12
    • US11754048
    • 2007-05-25
    • Viktor GruevZheng YangJan van der Spiegel
    • Viktor GruevZheng YangJan van der Spiegel
    • H04N3/14H04N9/64H01L27/00
    • H04N5/37457H04N5/3658H04N5/3741H04N5/378
    • A voltage and current mode active pixel sensor for high resolution imaging is presented. The photo pixel is composed of a photodiode and two transistors: reset and transconductance amplifier transistor. The switch transistor is moved outside the pixel, allowing for lower pixel pitch and increased linearity of the output photocurrent. The reset and amplifier (readout) transistors may also be shared among adjacent pixels by the introduction of transfer switches between the photodiodes and the source of the reset transistor and the gate of the readout transistor. The switch transistor outside the pixels provides biasing voltages or currents to the readout transistors to selectively turn them on when readout of the corresponding photodiode is desired and turns the readout transistor off when the corresponding photodiode is not to be read out. The increased linearity of the image sensor has greatly reduced spatial variations across the image after correlated double sampling and the column fix pattern noise is greatly improved.
    • 提出了一种用于高分辨率成像的电压和电流模式有源像素传感器。 照片像素由光电二极管和两个晶体管组成:复位和跨导放大晶体管。 开关晶体管移动到像素外部,允许较低的像素间距和增加的输出光电流的线性度。 复位和放大器(读出)晶体管也可以通过在光电二极管与复位晶体管的源极和读出晶体管的栅极之间引入转换开关而在相邻像素之间共享。 像素外部的开关晶体管向读出晶体管提供偏置电压或电流,以便在需要读出相应的光电二极管时选择性地打开它们,并且当相应的光电二极管不被读出时,使读出晶体管截止。 图像传感器增加的线性度大大降低了相关双采样后的图像上的空间变化,并且柱固定图案噪声大大提高。
    • 8. 发明申请
    • CMOS LINEAR VOLTAGE/CURRENT DUAL-MODE IMAGER
    • CMOS线性电压/电流双模式成像器
    • US20100060622A1
    • 2010-03-11
    • US12301400
    • 2007-05-18
    • Jan Van der SpiegelViktor GruevZheng Yang
    • Jan Van der SpiegelViktor GruevZheng Yang
    • G06F3/038
    • H04N5/3575H01L27/14621H01L27/14643H04N5/378
    • A CMOS image sensor that is capable of both voltage- and current-mode operations selects the mode based on the position of mode switches. Each pixel on the imager has a single transistor acting as either source follower for voltage readout, or transconductor for current readout. The two modes share the same readout lines, but have their own correlated double sampling (CDS) units for noise suppression. A current-mode readout technique using a velocity-saturated short-channel transistor may be used to achieve high linearity. An image array may be formed as a mixture of 3 types of pixels with identical photodiodes and access switches. The readout transistors are optimally sized for their designated mode of operation. Alternatively, two readout transistors are provided per pixel, each individually optimized for the desired mode of operation.
    • 能够进行电压和电流模式操作的CMOS图像传感器根据模式开关的位置选择模式。 成像器上的每个像素都具有单个晶体管,用作用于电压读出的源极跟随器,或用于电流读出的跨导体。 两种模式共享相同的读出线,但具有自己的相关双采样(CDS)单元进行噪声抑制。 可以使用使用速度饱和短沟道晶体管的电流模式读出技术来实现高线性度。 图像阵列可以形成为具有相同光电二极管和接入开关的3种像素的混合。 对于其指定的操作模式,读出晶体管的尺寸是最佳的。 或者,每个像素提供两个读出晶体管,每个单独针对所需的操作模式进行优化。
    • 10. 发明申请
    • METHOD FOR MEASURING BRIGHTNESS UNIFORMITY OF A PANEL
    • 测量面板亮度均匀度的方法
    • US20090051907A1
    • 2009-02-26
    • US12108693
    • 2008-04-24
    • Zheng-yang LiMing-rong Chen
    • Zheng-yang LiMing-rong Chen
    • G01J1/42G01J1/10
    • G01J1/32G02F1/1309
    • A method for measuring brightness uniformity of a panel is disclosed. The method includes steps of: dividing the panel into a plurality of areas, measuring brightness of each area, calculating each area of an average value K the brightness differences between the area and the other adjacent areas, and comparing the value K with a predetermined value. When the value K is greater than the predetermined value, it indicates that the brightness difference between the area and the adjacent areas exceeds a uniformity threshold. When the value K is smaller than the predetermined value, it indicates that the brightness difference between the area and the adjacent areas is below the uniformity threshold. The entire panel is evaluated to ensure accuracy of measuring results.
    • 公开了一种用于测量面板的亮度均匀性的方法。 该方法包括以下步骤:将面板划分为多个区域,测量每个区域的亮度,计算平均值K的每个面积,区域和其他相邻区域之间的亮度差,并将值K与预定值进行比较 。 当值K大于预定值时,表示区域和相邻区域之间的亮度差超过均匀阈值。 当值K小于预定值时,表示区域和相邻区域之间的亮度差低于均匀性阈值。 对整个面板进行评估,以确保测量结果的准确性。