公开(公告)号：US07486303B2

公开(公告)日：2009-02-03

申请号：US10852198

申请日：2004-05-25

申请人： Akihito Akai ,  Yasuyuki Kudo ,  Kazuo Okado

发明人： Akihito Akai ,  Yasuyuki Kudo ,  Kazuo Okado

IPC分类号： G09G5/10

CPC分类号： G09G3/3291 ,  G09G3/3233 ,  G09G2300/0842 ,  G09G2310/027 ,  G09G2320/0276 ,  G09G2330/028

摘要： An object of the present invention is to provide a signal line driving circuit capable of easily and optimally adjusting the gamma characteristics of R, G, and B self-emitting element groups (e.g., organic EL element groups) such that each gamma characteristic matches the characteristics of the self-emitting panel by accommodating variations among the characteristics of the R, G, and B self-emitting element groups, thereby providing enhanced image quality and versatility.A self-emitting display driving circuit (a signal line driving circuit) 302 includes 3 gray-scale voltage generating circuits 311 and 3 control registers 308 for R, G, and B self-emitting element groups, respectively, and these gray-scale voltage generating circuits and control registers can be adjusted separately. This arrangement makes it possible to accommodate variations among the characteristics of the R, G, and B self-emitting element groups and thereby provide enhanced image quality on the self-emitting display.

摘要翻译： 本发明的目的是提供一种信号线驱动电路，其能够容易且最佳地调整R，G和B自发光元件组（例如，有机EL元件组）的伽马特性，使得每个伽马特性与 通过适应R，G和B自发光元件组的特性之间的变化，自发光面板的特性，从而提供增强的图像质量和多功能性。 自发光显示驱动电路（信号线驱动电路）302分别包括3个灰度电压发生电路311和3个用于R，G和B自发光元件组的控制寄存器308，并且这些灰度电压 生成电路和控制寄存器可以单独调整。 这种布置使得可以适应R，G和B自发光元件组的特性之间的变化，从而在自发光显示器上提供增强的图像质量。

公开(公告)号：US20080272999A1

公开(公告)日：2008-11-06

申请号：US12108583

申请日：2008-04-24

申请人： Yoshiki Kurokawa ,  Yukari Katayama ,  Hiroki Awakura ,  Naoki Takada ,  Yasuyuki Kudo ,  Akihito Akai ,  Goki Toshimi ,  Akihisa Aoyama ,  Goro Sakamaki

发明人： Yoshiki Kurokawa ,  Yukari Katayama ,  Hiroki Awakura ,  Naoki Takada ,  Yasuyuki Kudo ,  Akihito Akai ,  Goki Toshimi ,  Akihisa Aoyama ,  Goro Sakamaki

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G3/3611 ,  G09G2320/0276 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2320/066 ,  G09G2330/021 ,  G09G2360/145 ,  G09G2360/16

摘要： In a display device and a display driver, when a grayscale of a display image is equal to or lower than a specific grayscale value obtained from a histogram of the display image, a display grayscale is extended with a linear function. On the other hand, when a grayscale of a display image is equal to or higher than the specific grayscale value, histogram equalization of a part higher than the specific grayscale value is performed, and the display grayscale is extended with a non-linear function obtained from the histogram equalization.

摘要翻译： 在显示装置和显示驱动器中，当显示图像的灰阶等于或低于从显示图像的直方图获得的特定灰度值时，以线性函数扩展显示灰度级。 另一方面，当显示图像的灰阶等于或高于特定灰度值时，执行高于特定灰度值的部分的直方图均衡，并且利用获得的非线性函数来扩展显示灰度级 从直方图均衡。

公开(公告)号：US20050007393A1

公开(公告)日：2005-01-13

申请号：US10852198

申请日：2004-05-25

申请人： Akihito Akai ,  Yasuyuki Kudo ,  Kazuo Okado

发明人： Akihito Akai ,  Yasuyuki Kudo ,  Kazuo Okado

IPC分类号： H01L51/50 ,  G09G3/20 ,  G09G3/30 ,  G09G3/32 ,  H04N5/66 ,  G09G5/10

CPC分类号： G09G3/3291 ,  G09G3/3233 ,  G09G2300/0842 ,  G09G2310/027 ,  G09G2320/0276 ,  G09G2330/028

摘要： An object of the present invention is to provide a signal line driving circuit capable of easily and optimally adjusting the gamma characteristics of R, G, and B self-emitting element groups (e.g., organic EL element groups) such that each gamma characteristic matches the characteristics of the self-emitting panel by accommodating variations among the characteristics of the R, G, and B self-emitting element groups, thereby providing enhanced image quality and versatility. A self-emitting display driving circuit (a signal line driving circuit) 302 includes 3 gray-scale voltage generating circuits 311 and 3 control registers 308 for R, G, and B self-emitting element groups, respectively, and these gray-scale voltage generating circuits and control registers can be adjusted separately. This arrangement makes it possible to accommodate variations among the characteristics of the R, G, and B self-emitting element groups and thereby provide enhanced image quality on the self-emitting display.

摘要翻译： 本发明的目的是提供一种信号线驱动电路，其能够容易且最佳地调整R，G和B自发光元件组（例如，有机EL元件组）的伽马特性，使得每个伽马特性与 通过适应R，G和B自发光元件组的特性之间的变化，自发光面板的特性，从而提供增强的图像质量和多功能性。 自发光显示驱动电路（信号线驱动电路）302分别包括3个灰度电压发生电路311和3个用于R，G和B自发光元件组的控制寄存器308，并且这些灰度电压 生成电路和控制寄存器可以单独调整。 这种布置使得可以适应R，G和B自发光元件组的特性之间的变化，从而在自发光显示器上提供增强的图像质量。

公开(公告)号：US20110206290A1

公开(公告)日：2011-08-25

申请号：US13033659

申请日：2011-02-24

申请人： Yukari Katayama ,  Akihito Akai ,  Yoshiki Kurokawa ,  Yusuke Uchida

发明人： Yukari Katayama ,  Akihito Akai ,  Yoshiki Kurokawa ,  Yusuke Uchida

IPC分类号： G06K9/36

CPC分类号： G09G3/3648 ,  G09G2320/0252 ,  G09G2320/0261 ,  G09G2320/0686 ,  G09G2320/103 ,  G09G2340/02 ,  G09G2340/16 ,  H04N19/124 ,  H04N19/146 ,  H04N19/172 ,  H04N19/42 ,  H04N19/60

摘要： The display driving circuit includes: an OD (OverDrive) calculation circuit operable to generate an OD driving signal for improving the response characteristic of a display device according to display image data; a drive-output circuit operable to supply an OD driving signal to the display device; and a compression circuit operable to store compressed display data in a memory. The compression circuit includes a DCT calculation module operable to execute DCT (Discrete Cosine Transform) of display image data, and an entropy coding module operable to execute variable length entropy coding of DCT conversion display data. Preferably, the display driving circuit further includes a decompression circuit operable to supply an OD calculation circuit with display data resulting from decompression of compressed display data read out the memory.

摘要翻译： 显示驱动电路包括：OD（OverDrive）计算电路，用于根据显示图像数据产生用于改善显示装置的响应特性的OD驱动信号; 驱动输出电路，其可操作以向所述显示装置提供OD驱动信号; 以及可操作以将压缩显示数据存储在存储器中的压缩电路。 压缩电路包括可以执行显示图像数据的DCT（离散余弦变换）的DCT计算模块和可操作以执行DCT变换显示数据的可变长度熵编码的熵编码模块。 优选地，显示驱动电路还包括解压缩电路，其可操作以向OD计算电路提供由对存储器读出的压缩显示数据的解压缩而得到的显示数据。

公开(公告)号：US20080129763A1

公开(公告)日：2008-06-05

申请号：US11923970

申请日：2007-10-25

申请人： Hiroki AWAKURA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Naoki Takada ,  Goro Sakamaki

发明人： Hiroki AWAKURA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Naoki Takada ,  Goro Sakamaki

IPC分类号： G09G5/10

CPC分类号： G09G3/3406 ,  G09G3/3233 ,  G09G2300/0842 ,  G09G2320/064 ,  G09G2360/144

摘要： A display brightness control circuit of a liquid crystal display device includes a logarithmic-linear converting circuit for converting an illuminance signal having a logarithmic relationship with incident light into a linear signal. When an output of an external light sensor is a logarithmic signal, the logarithmic signal is converted into a linear signal through the logarithmic-linear converting circuit, and when an output of the external light sensor is a linear signal, the logarithmic-linear converting circuit is not involved. The logarithmic-linear converting circuit corresponds to an exponential circuit which is an inverse function of a logarithm log. Further, when even the same logarithmic output illuminance sensor is different in input-output characteristics, setting of the abovementioned exponential circuit can be changed.

摘要翻译： 液晶显示装置的显示亮度控制电路包括对数线性转换电路，用于将具有入射光的对数关系的照度信号转换为线性信号。 当外部光传感器的输出是对数信号时，通过对数线性转换电路将对数信号转换成线性信号，并且当外部光传感器的输出是线性信号时，对数线性转换电路 不参与 对数线性转换电路对应于作为对数日志的反函数的指数电路。 此外，即使相同的对数输出照度传感器在输入输出特性上不同，也可以改变上述指数电路的设定。

公开(公告)号：US08059141B2

公开(公告)日：2011-11-15

申请号：US11923970

申请日：2007-10-25

申请人： Hiroki Awakura ,  Akihito Akai ,  Yoshiki Kurokawa ,  Naoki Takada ,  Goro Sakamaki

发明人： Hiroki Awakura ,  Akihito Akai ,  Yoshiki Kurokawa ,  Naoki Takada ,  Goro Sakamaki

IPC分类号： G09G5/10

CPC分类号： G09G3/3406 ,  G09G3/3233 ,  G09G2300/0842 ,  G09G2320/064 ,  G09G2360/144

摘要： A display brightness control circuit of a liquid crystal display device includes a logarithmic-linear converting circuit for converting an illuminance signal having a logarithmic relationship with incident light into a linear signal. When an output of an external light sensor is a logarithmic signal, the logarithmic signal is converted into a linear signal through the logarithmic-linear converting circuit, and when an output of the external light sensor is a linear signal, the logarithmic-linear converting circuit is not involved. The logarithmic-linear converting circuit corresponds to an exponential circuit which is an inverse function of a logarithm log. Further, when even the same logarithmic output illuminance sensor is different in input-output characteristics, setting of the abovementioned exponential circuit can be changed.

摘要翻译： 液晶显示装置的显示亮度控制电路包括对数线性转换电路，用于将具有入射光的对数关系的照度信号转换为线性信号。 当外部光传感器的输出是对数信号时，通过对数线性转换电路将对数信号转换成线性信号，并且当外部光传感器的输出是线性信号时，对数线性转换电路 不参与 对数线性转换电路对应于作为对数日志的反函数的指数电路。 此外，即使相同的对数输出照度传感器在输入输出特性上不同，也可以改变上述指数电路的设定。

公开(公告)号：US20110242112A1

公开(公告)日：2011-10-06

申请号：US12750794

申请日：2010-03-31

申请人： Yukari KATAYAMA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Takashi Shoji

发明人： Yukari KATAYAMA ,  Akihito Akai ,  Yoshiki Kurokawa ,  Takashi Shoji

IPC分类号： G06T1/00 ,  G06T9/00

CPC分类号： G09G5/36 ,  G09G2340/02 ,  G09G2360/18 ,  H04N19/115 ,  H04N19/154 ,  H04N19/17 ,  H04N19/196 ,  H04N19/198

摘要： The display driver includes: a display data compression circuit; a recording circuit; a display data decompression circuit; and an output circuit. Further, the display driver is provided with a compressibility setting circuit. The display data compression circuit has the function of compressing the display data according to a compressibility set by the compressibility setting circuit. With the display driver arranged like this, the power consumption can be reduced by increasing the compressibility for a displayed image such that the image quality is not noticeably deteriorated even with the compressibility increased. Further, for the displayed image such that the image quality is noticeably deteriorated with the compressibility increased, a sufficient image quality after data decompression can be secured by lowering the compressibility.

摘要翻译： 显示驱动器包括：显示数据压缩电路; 记录电路; 显示数据解压缩电路; 和输出电路。 此外，显示驱动器设置有压缩性设定电路。 显示数据压缩电路具有根据由压缩性设定电路设定的压缩率压缩显示数据的功能。 通过这样布置的显示驱动器，可以通过增加显示图像的压缩率来降低功耗，使得即使压缩率增加，图像质量也不会显着劣化。 此外，对于所显示的图像，使得图像质量在可压缩性增加时显着劣化，可以通过降低压缩性来确保数据解压缩之后的足够的图像质量。

公开(公告)号：US20100265242A1

公开(公告)日：2010-10-21

申请号：US12760582

申请日：2010-04-15

申请人： Naoki TAKADA ,  Naruhiko Kasai ,  Takuya Eriguchi ,  Yuki Okada ,  Mitsuru Goto ,  Akihito Akai

发明人： Naoki TAKADA ,  Naruhiko Kasai ,  Takuya Eriguchi ,  Yuki Okada ,  Mitsuru Goto ,  Akihito Akai

IPC分类号： G06F3/038 ,  G05F1/00

CPC分类号： H02M3/156

摘要： A power circuit includes a coil that charges an electric charge of an input voltage, a switch device that controls charging and discharging of the coil, a diode that rectifies the flow of the electric charge from the coil, a capacitor that stabilizes an output voltage when the switch device is turned on, and a driving circuit that controls ON and OFF states of the switch device. The power circuit alternately switches the ON and OFF states of the switch device to control charging and discharging of the coil and the capacitor, and generates and supplies an output voltage higher than the input voltage, and the driving circuit controls the off-period of the switch device according to the on-period of the switch device and the voltage ratio of the output voltage and the input voltage while changing the repetition period of the ON and OFF states of the switch device.

摘要翻译： 电源电路包括对输入电压的电荷进行充电的线圈，控制线圈的充电和放电的开关装置，对来自线圈的电荷的流量进行整流的二极管，稳定输出电压的电容器， 开关装置被接通，以及控制开关装置的ON和OFF状态的驱动电路。 电源电路交替地切换开关器件的导通和截止状态，以控制线圈和电容器的充电和放电，并产生并提供高于输入电压的输出电压，并且驱动电路控制 开关装置根据开关装置的导通周期和开关装置的ON和OFF状态的重复周期，输出电压和输入电压的电压比。

公开(公告)号：US08699803B2

公开(公告)日：2014-04-15

申请号：US13033659

申请日：2011-02-24

申请人： Yukari Katayama ,  Akihito Akai ,  Yoshiki Kurokawa ,  Yusuke Uchida

发明人： Yukari Katayama ,  Akihito Akai ,  Yoshiki Kurokawa ,  Yusuke Uchida

IPC分类号： G06K9/36

CPC分类号： G09G3/3648 ,  G09G2320/0252 ,  G09G2320/0261 ,  G09G2320/0686 ,  G09G2320/103 ,  G09G2340/02 ,  G09G2340/16 ,  H04N19/124 ,  H04N19/146 ,  H04N19/172 ,  H04N19/42 ,  H04N19/60

摘要： The display driving circuit includes: an OD (OverDrive) calculation circuit operable to generate an OD driving signal for improving the response characteristic of a display device according to display image data; a drive-output circuit operable to supply an OD driving signal to the display device; and a compression circuit operable to store compressed display data in a memory. The compression circuit includes a DCT calculation module operable to execute DCT (Discrete Cosine Transform) of display image data, and an entropy coding module operable to execute variable length entropy coding of DCT conversion display data. Preferably, the display driving circuit further includes a decompression circuit operable to supply an OD calculation circuit with display data resulting from decompression of compressed display data read out the memory.

摘要翻译： 显示驱动电路包括：OD（OverDrive）计算电路，用于根据显示图像数据产生用于改善显示装置的响应特性的OD驱动信号; 驱动输出电路，其可操作以向所述显示装置提供OD驱动信号; 以及可操作以将压缩显示数据存储在存储器中的压缩电路。 压缩电路包括可以执行显示图像数据的DCT（离散余弦变换）的DCT计算模块和可操作以执行DCT变换显示数据的可变长度熵编码的熵编码模块。 优选地，显示驱动电路还包括解压缩电路，其可操作以向OD计算电路提供由对存储器读出的压缩显示数据的解压缩而得到的显示数据。

公开(公告)号：US08325128B2

公开(公告)日：2012-12-04

申请号：US12170518

申请日：2008-07-10

申请人： Yukari Katayama ,  Yoshiki Kurokawa ,  Akihito Akai ,  Goro Sakamaki

发明人： Yukari Katayama ,  Yoshiki Kurokawa ,  Akihito Akai ,  Goro Sakamaki

IPC分类号： G09G3/36

CPC分类号： G09G3/3611 ,  G09G3/3406 ,  G09G3/3688 ,  G09G3/3696 ,  G09G2310/027 ,  G09G2320/0252 ,  G09G2320/0271 ,  G09G2320/041 ,  G09G2320/0646 ,  G09G2320/0673 ,  G09G2340/16 ,  G09G2360/18

摘要： In a display device such as a liquid crystal display, a processing for compressing a range of display data (grayscale) to a low grayscale side (a grayscale range where response is fast) except for a high grayscale side (a grayscale range where response is slow) at a predetermined compression ratio to conduct display according to response characteristic of transition between grayscales and a temperature state and a processing for increasing a light amount of a backlight to compensate for luminance change due to the compression are performed, for example, in a liquid crystal panel of TN liquid crystal. Thereby, response can be made fast even at a low temperature time.

摘要翻译： 在诸如液晶显示器的显示装置中，除了高灰阶侧（响应为灰度等级的灰度级范围）之外，将显示数据（灰度级）的范围压缩到低灰度级（响应快的灰度范围） 慢），以根据灰阶和温度状态之间的转变的响应特性进行显示，并且例如在一个例如在一个例子中执行用于增加背光的光量以补偿由于压缩引起的亮度变化的处理 TN液晶液晶面板。 因此即使在低温时也可以做出快速响应。