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    • 94. 发明授权
    • Frequency synthesis and synchronization for LED drivers
    • LED驱动器的频率合成和同步
    • US08373643B2
    • 2013-02-12
    • US12244796
    • 2008-10-03
    • Bin ZhaoAndrew M. KameyaVictor K. Lee
    • Bin ZhaoAndrew M. KameyaVictor K. Lee
    • G09G3/36
    • G09G3/3406G09G2320/064
    • A PWM generation module generates a PWM data signal used to control a light emitting diode (LED) driver for one or more strings of LEDs of a display device. The PWM data signal is synchronized with the frame boundaries of the video content being displayed. The PWM generation module can configure the PWM data signal such that a new PWM cycle is initiated at the start of each successive frame, and further whereby those PWM cycles that would be prematurely terminated at frame boundaries are instead driven at a constant reference level until the frame boundary. With this configuration, a substantially linear average light intensity can be achieved across frames, thereby reducing or eliminating display distortion that is often present in other PWM cycle synchronization techniques. The PWM generation module can use a self-learning process to make adjustments to the expected number of completeable PWM cycles per frame in response to dynamic changes in the frame rate, PWM frequency, or other related display parameters.
    • PWM生成模块生成用于控制显示装置的一个或多个LED串的发光二极管(LED)驱动器的PWM数据信号。 PWM数据信号与正在显示的视频内容的帧边界同步。 PWM生成模块可以配置PWM数据信号,使得在每个连续帧的开始处启动新的PWM周期,并且进一步地,将在帧边界处过早终止的那些PWM周期以恒定的参考电平驱动直到 帧边界。 利用这种配置,可以跨帧实现基本线性的平均光强度,从而减少或消除其他PWM周期同步技术中经常出现的显示失真。 PWM生成模块可以使用自学习过程来响应于帧速率,PWM频率或其他相关显示参数的动态变化来调整每帧的可完成PWM周期的预期数量。
    • 98. 发明授权
    • Battery cover assembly for portable electronic device
    • 便携式电子设备的电池盖组件
    • US08206845B2
    • 2012-06-26
    • US12391353
    • 2009-02-24
    • Jun LuBin Zhao
    • Jun LuBin Zhao
    • H01M5/10
    • H01M2/1022E05B65/006E05C3/04H01M2/1066
    • A battery cover assembly for a portable electronic device, the battery cover assembly includes a housing, a removable battery cover and a locking mechanism. The housing defines an opening and a receiving hole communicating each other. The removable battery cover includes a protrusion. The locking mechanism includes a latching member and an operating member. The latching member engages in the opening of the housing, the latching member forming a post engaging with the protrusion of the cover. The operating member engages in the receiving hole of the housing, and the operating member rotatably brings the latching member to releasably lock the post with the protrusion of the cover.
    • 一种用于便携式电子设备的电池盖组件,电池盖组件包括壳体,可拆卸电池盖和锁定机构。 壳体限定了彼此相通的开口和接收孔。 可拆卸的电池盖包括突起。 锁定机构包括闩锁构件和操作构件。 闩锁构件接合在壳体的开口中,闩锁构件形成与盖的突起接合的柱。 操作构件接合壳体的接收孔,并且操作构件可旋转地使闩锁构件可释放地锁定柱与盖的突起。
    • 100. 发明授权
    • Serial configuration for dynamic power control in LED displays
    • LED显示屏中动态功率控制的串行配置
    • US08179051B2
    • 2012-05-15
    • US12367672
    • 2009-02-09
    • Bin Zhao
    • Bin Zhao
    • H05B37/02
    • H05B33/0827H05B33/0815H05B33/0857
    • A power management technique in a light emitting diode (LED) system is disclosed. The LED system includes a plurality of LED driver connected in series, each LED driver configured to regulate the current flowing through a corresponding subset of a plurality of LED strings. Each LED driver determines the minimum tail voltage of the LED strings of the corresponding subset, compares the determined minimum tail voltage with an indicator of a minimum tail voltage of one or more other subsets provided from an upstream LED driver in the series, and then provides an indicator of the lower of the two tail voltages to the downstream LED driver. In this manner an indicator of the minimum tail voltage of the plurality of LED strings is cascaded through the series. A feedback controller monitors the minimum tail voltage represented by the cascaded indicator and accordingly adjusts an output voltage provided to the head ends of the plurality of LED strings.
    • 公开了一种发光二极管(LED)系统中的电源管理技术。 LED系统包括串联连接的多个LED驱动器,每个LED驱动器被配置为调节流过多个LED串的相应子集的电流。 每个LED驱动器确定相应子集的LED串的最小尾电压,将所确定的最小尾电压与从该系列中的上游LED驱动器提供的一个或多个其他子集的最小尾电压的指示器进行比较,然后提供 指示下游LED驱动器的两个尾部电压中较低的一个。 以这种方式,多个LED串的最小尾电压的指示器通过该系列级联。 反馈控制器监视由级联指示器表示的最小尾电压,并相应地调整提供给多个LED串的头端的输出电压。