公开(公告)号：US07889249B2

公开(公告)日：2011-02-15

申请号：US12832303

申请日：2010-07-08

申请人： Boon Keat Tan ,  Chi Mun Ho ,  Kevin Len Lim

发明人： Boon Keat Tan ,  Chi Mun Ho ,  Kevin Len Lim

IPC分类号： H04N9/64 ,  H04N5/217

CPC分类号： G01J1/46 ,  G01J1/0252 ,  G01J3/0286 ,  G01J2001/444 ,  H04N5/361 ,  H04N9/045

摘要： A system and method for canceling dark photocurrent in a color sensor circuit is disclosed. A color sensor is described including a color sensor circuit, a dark color sensor circuit, and a differential amplifier circuit. The color sensor circuit receives photocurrent from a color component of a light input. The color sensor circuit outputs a first voltage indicating intensity of the color component. The dark color sensor circuit receives dark photocurrent and outputs a second voltage indicating an offset voltage. The differential amplifier circuit is coupled to the color sensor circuit and to the dark color sensor circuit. The differential amplifier circuit receives the first and second voltages and outputs a final output that cancels contributions of the offset voltage in the first voltage due to the dark photocurrent.

摘要翻译： 公开了一种在彩色传感器电路中消除暗光电流的系统和方法。 描述了一种颜色传感器，其包括颜色传感器电路，深色传感器电路和差分放大器电路。 颜色传感器电路从光输入的颜色分量接收光电流。 颜色传感器电路输出指示颜色分量的强度的第一电压。 深色传感器电路接收暗光电流并输出指示偏移电压的第二电压。 差分放大器电路耦合到彩色传感器电路和暗色传感器电路。 差分放大器电路接收第一和第二电压，并输出由于暗光电流而消除第一电压中的偏移电压的贡献的最终输出。

公开(公告)号：US20190041936A1

公开(公告)日：2019-02-07

申请号：US15870629

申请日：2018-01-12

申请人： Poh Thiam Teoh ,  Mikal C. Hunsaker ,  Su Wei Lim ,  Gim Chong Lee ,  Hooi Kar Loo ,  Shashitheren Kerisnan ,  Siang Lin Tan ,  Ming Chew Lee ,  Ngeok Kuan Wai ,  Li Len Lim

发明人： Poh Thiam Teoh ,  Mikal C. Hunsaker ,  Su Wei Lim ,  Gim Chong Lee ,  Hooi Kar Loo ,  Shashitheren Kerisnan ,  Siang Lin Tan ,  Ming Chew Lee ,  Ngeok Kuan Wai ,  Li Len Lim

IPC分类号： G06F1/26 ,  G06F13/42 ,  G06F1/10

摘要： Aspects of the embodiments are directed to systems, methods, and apparatuses for controlling power management states using a clock request message across a 3.3 volt GPIO pin. Systems can include a CPU root port to transmit to a platform controller hub (PCH) compliant with a PCIe protocol, a first clock request message, the first clock request message comprising a first bit set to assert a clock request transmit (CLKREQ TX assert) on a 3.3 volt general purpose input/output (GPIO) pin local to the PCH; detect that a connected device is entering into a power management state; and transmit, from the CPU root port, to the PCH, a second clock request message, the second clock request message comprising the first bit set to deassert the clock request transmit (CLKREQ TX deassert) and a second bit to assert a clock request protocol (CLKREQ#) on a 3.3 volt GPIO pin.

公开(公告)号：US20060022122A1

公开(公告)日：2006-02-02

申请号：US10903112

申请日：2004-07-30

申请人： Boon Tan ,  Yoke Boay ,  Len Lim

发明人： Boon Tan ,  Yoke Boay ,  Len Lim

IPC分类号： G01J1/00 ,  G01J3/50 ,  H01J40/14

CPC分类号： G01J3/50 ,  G01J3/524

摘要： Method and apparatus for compensating for variations in the output signal of a color sensor due to varying temperature of the color sensor. The color sensor receives light and generates an output signal that is based on the received light. The temperature compensation mechanism measures the temperature of the color sensor and uses the measured temperature to selectively adjust the output signal of the color sensor to generate a compensated output signal that is not dependent on temperature of the color sensor.

公开(公告)号：US20050285017A1

公开(公告)日：2005-12-29

申请号：US10877864

申请日：2004-06-24

申请人： Boon Tan ,  Chi Ho ,  Len Lim

发明人： Boon Tan ,  Chi Ho ,  Len Lim

IPC分类号： G01J1/46 ,  G01J3/50 ,  H01J40/14 ,  H03F1/30

CPC分类号： G01J3/50 ,  G01J1/46

摘要： The color sensing circuit includes a light detector to receive light and to generate a signal that is dependent on the received light. The light detector includes a first electrode coupled to a first node and a second electrode coupled to a second predetermined signal. A storage device is provided that includes a first node and a second node coupled to the second predetermined signal. A first switch is provided that selectively couples the first node with the first electrode of the storage device based on a charge control signal. A signal processing circuit is provided that includes a first electrode and an output to generate an output signal that represents the light received by the light detector. A second switch is also provided that selectively couples the first electrode of the storage device with the first electrode of the signal processing circuit based on an evaluate control signal. The signal processing circuit selectively asserts the charge control signal and evaluate control signal.

摘要翻译： 颜色感测电路包括用于接收光并产生取决于所接收的光的信号的光检测器。 光检测器包括耦合到第一节点的第一电极和耦合到第二预定信号的第二电极。 提供了一种存储设备，其包括耦合到第二预定信号的第一节点和第二节点。 提供了第一开关，其基于充电控制信号选择性地将第一节点与存储装置的第一电极耦合。 提供了一种信号处理电路，其包括第一电极和输出端，以产生表示由光检测器接收的光的输出信号。 还提供了第二开关，其基于评估控制信号，选择性地将存储装置的第一电极与信号处理电路的第一电极耦合。 信号处理电路选择性地断言充电控制信号并评估控制信号。

公开(公告)号：US20060273331A1

公开(公告)日：2006-12-07

申请号：US11147056

申请日：2005-06-07

申请人： Kevin Len Lim ,  Yue Lau ,  Joon Lee ,  Janet Chua

发明人： Kevin Len Lim ,  Yue Lau ,  Joon Lee ,  Janet Chua

IPC分类号： H01L33/00

CPC分类号： H05B33/0866 ,  H05B33/0815

摘要： A two-terminal light-emitting diode (“LED”) device has a first terminal and a second terminal, and a first color LED and a second color LED. An intensity control device is coupled to the first color LED and a control circuit controls the intensity control device so as to produce a selected light intensity from the first color LED according to a control signal provided to the first terminal. The control signal also provides electrical power to the first color LED and to the second color LED.

摘要翻译： 两端子发光二极管（“LED”）器件具有第一端子和第二端子，以及第一颜色LED和第二颜色LED。 强度控制装置耦合到第一颜色LED，并且控制电路根据提供给第一终端的控制信号控制强度控制装置以便从第一颜色LED产生所选择的光强度。 控制信号还为第一颜色LED和第二颜色LED提供电力。

公开(公告)号：US20060022999A1

公开(公告)日：2006-02-02

申请号：US10902409

申请日：2004-07-28

申请人： Joon Lee ,  Len Lim ,  Rizal Jaffar

发明人： Joon Lee ,  Len Lim ,  Rizal Jaffar

IPC分类号： G09G5/10

CPC分类号： H05B33/0863 ,  H05B33/0869

摘要： In one embodiment, a user-selected color point is received. RGB tristimulus values are then derived for the color point. It is also determined whether the user-selected color point is outside a color selection range of the LED light source and, if so, an error flag is set. Pulse width modulated signals for a plurality of LED drivers for the LED light source are also generated. In another embodiment, tristimulus values representing a color of light produced by an LED light source are received. The received tristimulus values are then compared to tristimulus values corresponding to a user-identified color point. In response to the comparison, pulse width modulated signals are generated for a plurality of LED drivers for the LED light source. After a predetermined number of repetitions of these actions, an error flag is set if the user-selected color point has not been achieved by the LED light source.

摘要翻译： 在一个实施例中，接收用户选择的色点。 然后为色点导出RGB三刺激值。 还确定用户选择的色点是否在LED光源的颜色选择范围之外，如果是，则设置错误标志。 还产生用于LED光源的多个LED驱动器的脉宽调制信号。 在另一个实施例中，接收表示由LED光源产生的光的颜色的三刺激值。 然后将接收到的三刺激值与对应于用户标识的色点的三刺激值进行比较。 响应于比较，针对LED光源的多个LED驱动器产生脉宽调制信号。 在这些动作的预定重复次数之后，如果用户选择的色点未被LED光源实现，则设置错误标志。