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1.发明授权公开(公告)号：US08081199B2
公开(公告)日：2011-12-20
申请号：US12769399
申请日：2010-04-28
CPC分类号： H05B33/0815 , G09G3/342 , G09G2320/0233 , G09G2320/064 , G09G2330/021 , H05B33/0827 , Y02B20/346
摘要： A light emitting element drive apparatus that drives light emitting elements reduces power loss caused by variability between forward voltage drops of the light emitting elements. A plurality of voltage applying sections (1, 32 and 33; and 2, 34 and 35) generate application voltages based on a detection voltage determined based on a maximum forward voltage drop among the forward voltage drops of the light emitting element arrays (11 to 14), and apply the generated application voltages to the light emitting elements (11 to 14). Switching sections (30 and 31) switch between a plurality of voltage applying sections (1, 32 and 33; and 2, 34 and 35) to which the light emitting element arrays (11 to 14) individually connect. Controlling sections (40 to 42) control the switching sections (30 and 31) to switch connection to minimize the difference between forward voltage drops of light emitting element arrays (11 to 14).
摘要翻译： 驱动发光元件的发光元件驱动装置降低了由发光元件的正向电压降之间的变化引起的功率损耗。 多个电压施加部分（1,32和33;和2,34和35）基于基于发光元件阵列（11至22）的正向电压降中的最大正向压降确定的检测电压产生施加电压 14），并将生成的施加电压施加到发光元件（11〜14）。 开关部分（30和31）在发光元件阵列（11至14）单独连接的多个电压施加部分（1,32和33;以及2,34和35）之间切换。 控制部分（40至42）控制开关部分（30和31）以切换连接，以最小化发光元件阵列（11至14）的正向压降之间的差异。
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公开(公告)号：US20110316902A1
公开(公告)日：2011-12-29
申请号：US13255365
申请日：2010-09-29
申请人： Toshiki Onishi , Hideyuki Nakanishi , Takahiro Kobayashi , Yoshio Umeda , Akihiro Yamamura , Seiji Hamada
发明人： Toshiki Onishi , Hideyuki Nakanishi , Takahiro Kobayashi , Yoshio Umeda , Akihiro Yamamura , Seiji Hamada
CPC分类号： G09G3/3426 , G09G3/3611 , G09G2310/024 , G09G2320/0261 , G09G2320/0633 , G09G2320/064 , G09G2320/0646 , G09G2320/066 , G09G2320/10 , G09G2320/106 , G09G2360/16 , H04N5/144 , H04N5/44591 , H04N5/66 , H04N21/4318 , H04N21/44008
摘要： Provided is a backlight device, wherein when both the drive duty and the drive current are controlled in each of separated areas, the image quality is improved by preventing the change of luminance even when there is a difference between the adjustment resolutions of both the drive duty and the drive current. A light-emitting unit (121) comprises a plurality of light-emitting areas. A motion amount detecting unit (131) detects the motion amount of an image in each of a plurality of motion areas each corresponding to at least one or more light-emitting areas. A drive condition specifying unit specifies a drive condition including the duty and pulse height value of a drive pulse for causing each of the plurality of light-emitting areas to emit light, on the basis of the detected motion amount. A drive unit drives each of the plurality of light-emitting areas according to the specified drive condition. With one of the duty and the pulse height value of the drive pulse, the adjustment resolution of which of the drive unit with respect to the light emission luminance is lower, as a first parameter and the other the adjustment resolution of which is higher as a second parameter, the drive condition specifying unit determines the value of the first parameter on the basis of the detected motion amount, and thereafter determines the value of the second parameter on the basis of the determined value of the first parameter.
摘要翻译： 提供一种背光装置，其中当驱动占空比和驱动电流都在每个分离区域中被控制时，即使当两个驱动占空比的调节分辨率之间存在差异时，也防止亮度变化来提高图像质量 和驱动电流。 发光单元（121）包括多个发光区域。 运动量检测单元（131）检测每个对应于至少一个或多个发光区域的多个运动区域中的每一个中的图像的运动量。 驱动条件指定单元基于检测到的运动量指定包括用于使多个发光区域中的每一个发光的驱动脉冲的占空比和脉冲高度值的驱动条件。 驱动单元根据指定的驱动条件驱动多个发光区域中的每一个。 利用驱动脉冲的占空比和脉冲高度值中的一个，相对于发光亮度的驱动单元的调节分辨率较低，作为第一参数，另一个调整分辨率高于 第二参数，驱动条件指定单元基于检测到的运动量确定第一参数的值，然后基于确定的第一参数的值来确定第二参数的值。
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公开(公告)号：US20110304657A1
公开(公告)日：2011-12-15
申请号：US13203181
申请日：2010-09-28
申请人： Akihiro Yamamura , Takahiro Kobayashi , Yoshio Umeda , Hideyuki Nakanishi , Toshiki Onishi , Seiji Hamada
发明人： Akihiro Yamamura , Takahiro Kobayashi , Yoshio Umeda , Hideyuki Nakanishi , Toshiki Onishi , Seiji Hamada
IPC分类号： G09G5/10
CPC分类号： G09G3/3426 , G02F1/133603 , G02F2001/133601 , G09G3/3611 , G09G2300/0434 , G09G2320/0247 , G09G2320/0261 , G09G2320/0276 , G09G2320/103 , G09G2320/106 , G09G2360/16
摘要： Disclosed is a backlight device that reduces elevated black levels and the visibility of flickering when displaying a video. A light-emitting unit (121) is provided with a plurality of light-emitting areas that individually emit illumination light, and illuminates a liquid crystal panel (110) with the illumination light from the plurality of light-emitting areas. A motion detection unit (150) detects image motion from an image signal. A brightness control unit (130) acquires a brightness determination reference value for each light-emitting area on the basis of the image signal, and in regards to each of the plurality of light-emitting areas, weights the acquired brightness determination reference value for each of the one or more light-emitting areas that constitute a weighting region and determines the light emission brightness value for each of the light-emitting areas on the basis of the weighting results. An LED driver (122) drives each of the plurality of light-emitting areas in accordance with the determined light emission brightness value for each of the light-emitting areas. The brightness control unit (130) dynamically sets the light-emitting areas that constitute the weighting areas in accordance with the detected motion.
摘要翻译： 公开了一种背光装置，其在显示视频时降低升高的黑色电平和闪烁的可见性。 发光单元（121）设置有分别发出照明光的多个发光区域，并且利用来自多个发光区域的照明光照射液晶面板（110）。 运动检测单元（150）从图像信号检测图像运动。 亮度控制单元基于图像信号获取每个发光区域的亮度确定基准值，并且对于多个发光区域中的每一个，对于每个发光区域，对于每个发光区域，获取的亮度确定基准值 构成加权区域的一个或多个发光区域，并且基于加权结果确定每个发光区域的发光亮度值。 LED驱动器（122）根据每个发光区域的确定的发光亮度值来驱动多个发光区域中的每一个。 亮度控制单元（130）根据检测到的运动动态地设定构成加权区域的发光区域。
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公开(公告)号：US20120013652A1
公开(公告)日：2012-01-19
申请号：US13203213
申请日：2010-09-29
申请人： Toshiki Onishi , Hideyuki Nakanishi , Takahiro Kobayashi , Yoshio Umeda , Akihiro Yamamura , Seiji Hamada
发明人： Toshiki Onishi , Hideyuki Nakanishi , Takahiro Kobayashi , Yoshio Umeda , Akihiro Yamamura , Seiji Hamada
IPC分类号： G09G5/10
CPC分类号： G09G3/3426 , G09G2320/0261 , G09G2320/0633 , G09G2320/064 , G09G2320/0653 , G09G2320/106 , H04N5/66
摘要： Provided is a backlight device wherein when the drive duty and the drive current are controlled according to a motion, the image quality is improved by preventing flicker caused by the change of the drive waveform. A light-emitting unit (121) comprises a plurality of light-emitting areas. A motion amount detecting unit (131) detects the motion amount of an image in each of a plurality of motion areas each corresponding to at least one or more light-emitting areas. A drive condition specifying unit specifies a drive condition including the duty and pulse height value of a drive pulse for causing each of the plurality of light-emitting areas to emit light, on the basis of the detected motion amount. A drive unit drives each of the plurality of light-emitting areas according to the specified drive condition. The drive condition specifying unit adjusts the drive condition such that the drive condition temporally smoothly changes.
摘要翻译： 提供一种背光装置，其中当根据运动控制驱动占空比和驱动电流时，通过防止由驱动波形的变化引起的闪烁来提高图像质量。 发光单元（121）包括多个发光区域。 运动量检测单元（131）检测每个对应于至少一个或多个发光区域的多个运动区域中的每一个中的图像的运动量。 驱动条件指定单元基于检测到的运动量指定包括用于使多个发光区域中的每一个发光的驱动脉冲的占空比和脉冲高度值的驱动条件。 驱动单元根据指定的驱动条件驱动多个发光区域中的每一个。 驱动条件指定单元调节驱动条件使得驱动条件在时间上平稳地改变。
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公开(公告)号：US08581941B2
公开(公告)日：2013-11-12
申请号：US13203213
申请日：2010-09-29
申请人： Toshiki Onishi , Hideyuki Nakanishi , Takahiro Kobayashi , Yoshio Umeda , Akihiro Yamamura , Seiji Hamada
发明人： Toshiki Onishi , Hideyuki Nakanishi , Takahiro Kobayashi , Yoshio Umeda , Akihiro Yamamura , Seiji Hamada
IPC分类号： G09G5/10
CPC分类号： G09G3/3426 , G09G2320/0261 , G09G2320/0633 , G09G2320/064 , G09G2320/0653 , G09G2320/106 , H04N5/66
摘要： Provided is a backlight device wherein when the drive duty and the drive current are controlled according to a motion, the image quality is improved by preventing flicker caused by the change of the drive waveform. A light-emitting unit (121) comprises a plurality of light-emitting areas. A motion amount detecting unit (131) detects the motion amount of an image in each of a plurality of motion areas each corresponding to at least one or more light-emitting areas. A drive condition specifying unit specifies a drive condition including the duty and pulse height value of a drive pulse for causing each of the plurality of light-emitting areas to emit light, on the basis of the detected motion amount. A drive unit drives each of the plurality of light-emitting areas according to the specified drive condition. The drive condition specifying unit adjusts the drive condition such that the drive condition temporally smoothly changes.
摘要翻译： 提供一种背光装置，其中当根据运动控制驱动占空比和驱动电流时，通过防止由驱动波形的变化引起的闪烁来提高图像质量。 发光单元（121）包括多个发光区域。 运动量检测单元（131）检测每个对应于至少一个或多个发光区域的多个运动区域中的每一个中的图像的运动量。 驱动条件指定单元基于检测到的运动量指定包括用于使多个发光区域中的每一个发光的驱动脉冲的占空比和脉冲高度值的驱动条件。 驱动单元根据指定的驱动条件驱动多个发光区域中的每一个。 驱动条件指定单元调节驱动条件使得驱动条件在时间上平稳地改变。
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公开(公告)号：US08207953B2
公开(公告)日：2012-06-26
申请号：US12726787
申请日：2010-03-18
申请人： Akihiro Yamamura , Takahiro Kobayashi , Hideyuki Nakanishi , Toshiki Onishi , Seiji Hamada , Atsushi Nakanishi
发明人： Akihiro Yamamura , Takahiro Kobayashi , Hideyuki Nakanishi , Toshiki Onishi , Seiji Hamada , Atsushi Nakanishi
IPC分类号： G06F3/038
CPC分类号： G09G3/3426 , G02F2001/133601 , G09G3/3648 , G09G2320/0646 , G09G2360/144
摘要： The backlight apparatus allows brightness control with minimum image quality deterioration. This apparatus has: an illuminating section that radiates illumination light on a back of a liquid crystal panel comprising a plurality of image display areas; and a brightness determining section that determines a light emission brightness value of the illuminating section and renews a light emitting state of the illuminating section, based on the determined light emission brightness value. The illuminating section has light emitting areas illuminating each of a plurality of image display areas. The brightness determining section determines light emission brightness values of the image display areas, from values acquired by applying weights to the information based on input image signals of the image display areas, and changes the weights for the information based on luminance of ambient light surrounding the backlight apparatus.
摘要翻译： 背光装置允许以最小图像质量劣化的亮度控制。 该装置具有：照明部，其在包括多个图像显示区域的液晶面板的背面上照射照明光; 以及亮度确定部，其基于所确定的发光亮度值，确定所述照明部的发光亮度值，并且更新所述照明部的发光状态。 照明部具有照亮多个图像显示区域中的每一个的发光区域。 亮度确定部分根据通过基于图像显示区域的输入图像信号对该信息应用加权而获得的值来确定图像显示区域的发光亮度值，并且基于围绕该图像显示区域的周围环境光的亮度来改变该信息的权重 背光装置。
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公开(公告)号：US20120007844A1
公开(公告)日：2012-01-12
申请号：US13257782
申请日：2010-09-28
IPC分类号： G09G5/00
CPC分类号： G09G3/3426 , G09G3/342 , G09G3/3611 , G09G2310/024 , G09G2320/0247 , G09G2320/0261 , G09G2320/064 , G09G2320/0646 , G09G2320/103 , G09G2330/021 , H05B33/0854
摘要： Provided is a backlight device, wherein when the drive duty and drive current are controlled in each of predetermined light-emitting areas of a light-emitting unit, the color unevenness and moving image resolution difference between image display areas corresponding thereto are improved. A light-emitting unit (121) comprises a plurality of light-emitting areas. A motion amount detecting unit (131) detects the motion amount of an image in each of image display areas. A drive condition specifying unit specifies, with respect to each of the plurality of light-emitting areas, a drive condition including the duty and pulse height value of a drive pulse for causing each of the plurality of light-emitting areas to emit light, on the basis of the detected motion amount. An LED driver (123) drives each of the plurality of light-emitting areas on the specified drive condition. When a difference between the detected motion amounts occurs between adjacent image display areas, the drive condition specifying unit adjusts the drive conditions such that a difference between the drive conditions occurring between adjacent light-emitting areas is reduced according to the difference between the detected motion amounts.
摘要翻译： 提供一种背光装置，其中当在发光单元的预定发光区域中的每一个中控制驱动占空比和驱动电流时，与之对应的图像显示区域之间的颜色不均匀和运动图像分辨率差异得到改善。 发光单元（121）包括多个发光区域。 运动量检测单元（131）检测每个图像显示区域中的图像的运动量。 驱动条件指定单元针对多个发光区域中的每一个指定包括用于使多个发光区域中的每一个发光的驱动脉冲的占空比和脉冲高度值的驱动条件， 检测运动量的基础。 LED驱动器（123）在指定的驱动条件下驱动多个发光区域中的每一个。 当在相邻的图像显示区域之间发生检测到的运动量之间的差异时，驱动条件指定单元调节驱动条件，使得相邻的发光区域之间出现的驱动条件之间的差异根据检测到的运动量 。
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公开(公告)号：US20120025716A1
公开(公告)日：2012-02-02
申请号：US13262744
申请日：2010-09-28
申请人： Hideyuki Nakanishi , Yoshio Umeda , Toshiki Onishi , Seiji Hamada
发明人： Hideyuki Nakanishi , Yoshio Umeda , Toshiki Onishi , Seiji Hamada
IPC分类号： H05B37/02
CPC分类号： G09G3/3406 , G09G2320/064 , G09G2320/106 , G09G2330/021
摘要： Disclosed is a backlight device that suppresses the increase of maximum power consumption. A light-emitting unit (121) is provided with a plurality of light-emitting areas that individually emit illumination light. A power estimation unit (136) estimates the power consumption of the light-emitting unit (121). A duty lower-limit setting unit (137) varies the range in which drive conditions that include the duty and peak value of a drive pulse for causing each of the plurality of light-emitting areas to emit light can be set, in accordance with changes in the estimated power consumption. A drive condition specification unit specifies the drive conditions for each of the plurality of light-emitting areas within the varied range. An LED driver (123) drives each of the plurality of light-emitting areas under the specified drive conditions.
摘要翻译： 公开了抑制最大功耗增加的背光装置。 发光单元（121）设置有分别发射照明光的多个发光区域。 功率估计单元（136）估计发光单元（121）的功耗。 负载下限设定单元（137）根据变化来改变包括用于使多个发光区域中的每个发光区域发光的驱动脉冲的占空比和峰值的驱动条件的范围 在估计功耗。 驱动条件指定单元指定在变化范围内的多个发光区域中的每一个的驱动条件。 LED驱动器（123）在指定的驱动条件下驱动多个发光区域中的每一个。
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公开(公告)号：US06407480B1
公开(公告)日：2002-06-18
申请号：US09581974
申请日：2000-07-12
IPC分类号： H01L4108
CPC分类号： H05B41/2824 , H05B41/2822 , H05B41/3925
摘要： In order to provide a piezoelectric transformer-driving circuit capable of obtaining a drive pulse signal having a high frequency resolution from a clock having a low frequency, carrying out voltage detection by using a low-cost configuration, and carrying out digital processing, a piezoelectric transformer-driving circuit in accordance with the present invention is configured so that an error voltage calculation circuit multiplies the difference data between the output data of an A/D converter and reference data supplied externally by a constant and outputs the result as error data, so that a frequency setting circuit sets the frequency of the drive pulse signal of the piezoelectric transformer as M-bit data depending on the error data, and so that a frequency division ratio distribution divider circuit divides a clock having a predetermined frequency to generate the drive pulse signal of the piezoelectric transformer, wherein the frequency division ratio of the frequency division ratio distribution divider circuit is distributed for the period of N cycles (N: an integer) of the drive pulse signal of the piezoelectric transformer, and the average frequency division ratio for the period of N cycles is substantially equal to the value obtained by dividing the M-bit data output from the above-mentioned frequency setting circuit by N.
摘要翻译： 为了提供一种能够从具有低频的时钟获得具有高频分辨率的驱动脉冲信号的压电变压器驱动电路，通过使用低成本配置进行电压检测并进行数字处理，压电 根据本发明的变压器驱动电路被配置为使得误差电压计算电路将A / D转换器的输出数据和外部提供的参考数据之间的差分数据乘以常数并输出结果作为错误数据，因此 频率设定电路将压电变压器的驱动脉冲信号的频率设定为取决于误差数据的M位数据，并且使得分频比分配分配电路将具有预定频率的时钟分频以产生驱动脉冲 信号的压电变压器，其中分频大鼠的分频比 io分配电路在压电变压器的驱动脉冲信号的N个周期（N：整数）的周期内分布，并且N个周期的周期的平均分频比基本上等于通过将 从上述频率设定电路输出的M位数据由N.
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公开(公告)号：US06903517B2
公开(公告)日：2005-06-07
申请号：US10362943
申请日：2002-06-26
IPC分类号： H05B41/282 , H05B41/392 , H05B41/24 , H01L41/04
CPC分类号： H05B41/3925 , H05B41/2822 , H05B41/2824 , H05B41/3927 , Y02B20/186
摘要： A cold cathode tube driving device using a piezoelectric transformer in which an output voltage varies depending on a frequency of an input voltage, as a booster transformer for driving a cold cathode tube, includes: a frequency dividing means which generates a driving pulse of an average frequency corresponding to frequency data outputted from a frequency setting means at a distribution cycle which is a driving pulse N cyclic period; a controller which controls a control cycle so as to perform the same driving for predetermined number of times A (A≧2) at the average frequency; and a burst pulse generating means which generates a pulse having a duty width in accordance with a dimming level externally applied thereto and having a frequency outputted from the controller.A control cycle is A times (natural number) the distribution cycle and the driving is performed A times at the same average frequency, whereby a digital driving system using the frequency distribution of the driving pulse is achieved. Consequently, a space for the driving circuit can be saved and cost can be reduced. Further, a frequency distribution system is adopted, thereby obtaining frequency resolution required for satisfactory dimming performance and lighting performance. Moreover, a burst dimming system is adopted, thereby suppressing brightness flicker seen in a tube current control system. Additionally, there is no electric power loss seen in a system in which a power source is turned on or off and further a shield circuit is unnecessary because of a system in which the driving pulse is turned on or off. In particular, the control cycle is A times the distribution cycle and the burst dimming is performed in which the driving is executed A times at the same average frequency, whereby the brightness flicker can be prevented by controlling the tube current to be constant with high dimming resolution assured.
摘要翻译： 一种使用压电变压器的冷阴极管驱动装置，其中输出电压根据输入电压的频率而变化，作为用于驱动冷阴极管的升压变压器，包括：分频装置，其产生平均的驱动脉冲 频率对应于从作为驱动脉冲N周期的分配周期的频率设定单元输出的频率数据; 控制器，其以平均频率控制控制周期以执行相同的驱动预定次数A（A> = 2）; 以及脉冲串脉冲发生装置，其产生具有根据外部施加到其上的调光电平的占空比宽度并具有从控制器输出的频率的脉冲。 控制周期是A次（自然数）的分配周期，并且以相同的平均频率进行A次驱动，由此实现使用驱动脉冲的频率分布的数字驱动系统。 因此，可以节省驱动电路的空间并降低成本。 此外，采用频率分配系统，从而获得令人满意的调光性能和照明性能所需的频率分辨率。 此外，采用脉冲调光系统，从而抑制管电流控制系统中看到的亮度闪烁。 此外，由于驱动脉冲导通或关断的系统，在电源接通或关断的系统中看不到电力损耗，并且还需要屏蔽电路。 特别地，控制周期为分配周期的A倍，并且进行脉冲调制，其中以相同的平均频率执行驱动A次，从而可以通过在高调光下控制管电流恒定来防止亮度闪烁 分辨率有保证。
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