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1. 发明专利

AT545979T 未知
公开(公告)号：AT545979T
公开(公告)日：2012-03-15
申请号：AT09176844
申请日：2009-11-24
申请人： HITACHI DISPLAYS LTD , PANASONIC LIQUID CRYSTAL DISPL
发明人： KASAI NARUHIKO , ERIGUCHI TAKUYA , OKADA YUKI , GOTO MITSURU , KOTANI YOSHIHIRO , TAKADA NAOKI
IPC分类号： H02M3/156 , G09G3/36
摘要： Provided are a power supply circuit and a display device which are capable of enhancing power efficiency even when applied to a display panel whose current consumption varies. The power supply circuit boosts and outputs an input voltage using a booster chopper circuit. A frequency control circuit changes a frequency of a clock signal, which controls a switch of the chopper circuit, in accordance with a load of the power supply circuit. The frequency control circuit divides an operation of the display device into a display effective period at a high load and a vertical retrace period at a low load, based on a vertical synchronizing signal and a horizontal synchronizing signal. The frequency control circuit sets the frequency of the clock signal in a high-load period to be higher than that in a low-load period.

2. 发明专利

JP2010026528A Display and driving method therefor 有权
标题翻译：显示和驱动方法
公开(公告)号：JP2010026528A
公开(公告)日：2010-02-04
申请号：JP2009246031
申请日：2009-10-27
申请人： Hitachi Displays Ltd , Hitachi Ltd , 株式会社日立ディスプレイズ , 株式会社日立製作所
发明人： TAKADA NAOKI , NITTA HIROYUKI , KOGANEZAWA NOBUYUKI , ONO KIKUO , SHOJI TAKASHI
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20 , H04N5/66
摘要： PROBLEM TO BE SOLVED: To suppress the shortage of the image gradation voltage of a display and the blurring of moving images. SOLUTION: The scanning driver 104 sequentially selects another four pixel lines line by line with double gate driving, after selecting four pixel lines in one unit. The data driver 103 sequentially supplies the gradation voltage corresponding to the display data to another pixels in one unit of four lines, after supplying the gradation voltage corresponding to the black data to pixels of four lines in one unit. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：抑制显示器的图像灰度电压的短缺和运动图像的模糊。解决方案：在一个单位中选择四个像素线之后，扫描驱动器104顺序地选择另外四个像素线逐行地进行双栅极驱动。数据驱动器103在将与黑色数据相对应的灰度电压以一个单位的四行的像素提供之后，将与显示数据相对应的灰度电压顺序地提供给另一个四个一行的像素。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JP2011048057A Liquid crystal display device 有权
标题翻译：液晶显示装置
公开(公告)号：JP2011048057A
公开(公告)日：2011-03-10
申请号：JP2009195289
申请日：2009-08-26
申请人： Hitachi Displays Ltd , 株式会社日立ディスプレイズ
发明人： TAKADA NAOKI , KASAI SHIGEHIKO , MANBA NORIO , GOTO MITSURU , MATSUMOTO HIDEICHIRO
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20
CPC分类号： G09G3/3688 , G09G3/3614 , G09G2310/0248 , G09G2310/0297 , G09G2320/0247 , G09G2330/021
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal display device having low power effect by using a dot inversion-driving system of a polarity inversion line dispersion type, which suppresses the deterioration of image quality. SOLUTION: The liquid crystal display device of dot inversion driving system includes: a pixel array having a plurality of pixels which form pixel rows and pixel columns arranged in a matrix shape; a data driver circuit which supplies a gradation voltage corresponding to display data to the pixels; a short circuit having switch elements each of which is arranged for each output of the data driver circuit and connects each output to a precharge voltage different from the output voltage; and a scanning circuit for supplying a scanning signal which selects the pixel in a line unit of each pixel row, wherein polarity of the gradation voltage is inverted at least every two pixel rows. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：通过使用极性反转线色散型的点反转驱动系统来提供具有低功率效果的液晶显示装置，其抑制图像质量的劣化。点反转驱动系统的液晶显示装置包括：具有形成像素行的多个像素和以矩阵形状排列的像素列的像素阵列; 数据驱动电路，向像素提供与显示数据对应的灰度电压; 具有开关元件的短路，每个开关元件被布置用于数据驱动器电路的每个输出，并将每个输出连接到不同于输出电压的预充电电压; 以及扫描电路，用于提供选择每个像素行的行单元中的像素的扫描信号，其中灰度电压的极性至少每两个像素行反转。版权所有（C）2011，JPO＆INPIT

4. 发明专利

JP2010044187A Display device 审中-公开
标题翻译：显示设备
公开(公告)号：JP2010044187A
公开(公告)日：2010-02-25
申请号：JP2008207741
申请日：2008-08-12
申请人： Hitachi Displays Ltd , 株式会社日立ディスプレイズ
发明人： ERIGUCHI TAKUYA , MANBA NORIO , TAKADA NAOKI , IWASAKI SHINICHI
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20
摘要： PROBLEM TO BE SOLVED: To provide a display device in which insufficient write-in of a drain line and coupling fluctuation of common potential are reduced.
SOLUTION: The display device includes a time division drive circuit which divides one horizontal period in which gradation voltage is supplied to respective pixels in one horizontal line into a first period, a second period and a third period, and supplies the gradation voltage to respective drain lines of R, G and B in a time-division manner. The display device includes a circuit which divides the gradation voltage of each pixel into high-order, middle-order and low-order ranges, and when respective gradation voltage ranges of R, G, and B are the same ranges, or the respective gradation voltage ranges of R and G are middle-order ones, it selects the drain line of R and the drain line of G and applies the gradation voltage of R simultaneously in the first period, and selects the drain line of G and the drain line of B and applies the gradation voltage of G simultaneously in the second period, and then selects the drain line of B and applies the gradation voltage of B simultaneously in the third period.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种其中漏极线的写入不足和共同电位的耦合波动减小的显示装置。解决方案：显示装置包括时分驱动电路，其将提供灰度电压的一个水平周期分成一个水平行中的各个像素到第一周期，第二周期和第三周期，并且将灰度电压以时分方式分配到R，G和B的相应漏极线。显示装置包括将各像素的灰度电压分为高阶，中等和低阶范围的电路，并且当R，G和B的各个灰度级电压范围为相同的范围时， R和G的电压范围为中间级，选择R的漏极线和G的漏极线，并在第一个周期内同时施加R的灰度电压，并选择G的漏极线和漏极线 B，并在第二期间同时施加G的灰度电压，然后选择B的漏极线，并在第三期间同时施加B的灰度电压。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2007114514A Display apparatus 审中-公开
标题翻译：显示设备
公开(公告)号：JP2007114514A
公开(公告)日：2007-05-10
申请号：JP2005306156
申请日：2005-10-20
申请人： Hitachi Displays Ltd , 株式会社日立ディスプレイズ
发明人： KAJIWARA HISAYOSHI , FURUHASHI TSUTOMU , NITTA HIROYUKI , TAKADA NAOKI
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20
CPC分类号： G09G3/3688 , G09G3/2003 , G09G3/3291 , G09G2310/027 , G09G2310/0297 , G09G2320/0276 , G09G2330/021 , H03M1/785
摘要： PROBLEM TO BE SOLVED: To attain low costs and low power consumption for a multi-gradation and high-quality liquid crystal display apparatus.
SOLUTION: After storing an output voltage of an R-2R ladder-resistance type digital-analog converter circuit 104 in a sample-hold capacitor 802 through a sample-hold charge amplifier 801, the voltage stored in this capacitor 802 is output all at once to the liquid crystal panel side through a panel drive amplifier 105 and a multiplexor 106. Power sources for the digital-analog converter circuit 104 and the charging amplifier 801 are turned ON by a switch 803 only for a period in which the voltage is being written in the capacitor 802, and they are turned OFF in the other period. In order to perform the operation for charging the capacitor 802 with the analog voltage in parallel with the operation for extracting the analog voltage stored in the capacitor 802 and outputting it to the liquid crystal panel, the capacitor 802 and the panel drive amplifiers 105 are provided in two systems, respectively.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了实现多级和高品质液晶显示装置的低成本和低功耗。解决方案：通过采样保持电荷放大器801将R-2R梯形电阻型数模转换器电路104的输出电压存储在采样保持电容器802中之后，输出存储在该电容器802中的电压一直通过面板驱动放大器105和多路复用器106一直到液晶面板侧。数模转换器电路104和充电放大器801的电源仅通过开关803导通，其中电压正在写入电容器802中，并且在另一个周期中它们被关断。为了执行与用于提取存储在电容器802中的模拟电压的操作并且将其输出到液晶面板的模拟电压并联的电容器802的操作，电容器802和面板驱动放大器105被提供分别在两个系统中。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2004279741A Display and driving method therefor 有权
公开(公告)号：JP2004279741A
公开(公告)日：2004-10-07
申请号：JP2003071194
申请日：2003-03-17
申请人： Hitachi Displays Ltd , Hitachi Ltd , 株式会社日立ディスプレイズ , 株式会社日立製作所
发明人： TAKADA NAOKI , NITTA HIROYUKI , KOGANEZAWA NOBUYUKI , ONO KIKUO , SHOJI TAKASHI
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36 , H04N5/66
CPC分类号： G09G3/3648 , G09G2310/021 , G09G2310/0251 , G09G2310/062 , G09G2320/0261
摘要： PROBLEM TO BE SOLVED: To avoid the shortage of the image gradation voltage and to suppress blurred images.
SOLUTION: The scanning driver 104, after selecting four pixel lines in block, selects another four pixel lines line by line, in double gate driving. The data driver 103, after supplying the gradation voltage for the black data in units of four pixel lines, sequentially supplies the gradation voltage which corresponds to the display data for another four pixel lines.
COPYRIGHT: (C)2005,JPO&NCIPI

7. 发明专利

JP2011085663A Driving circuit and display device 审中-公开
标题翻译：驱动电路和显示设备
公开(公告)号：JP2011085663A
公开(公告)日：2011-04-28
申请号：JP2009236606
申请日：2009-10-13
申请人： Hitachi Displays Ltd , Panasonic Liquid Crystal Display Co Ltd , パナソニック液晶ディスプレイ株式会社 , 株式会社日立ディスプレイズ
发明人： OCHIAI TAKAHIRO , GOTO MITSURU , NAKAYASU YOZO , AOKI YOSHINORI , OKADA YUKI , TAKADA NAOKI
IPC分类号： G09G3/36 , G02F1/133 , G02F1/1362 , G09G3/20
摘要： PROBLEM TO BE SOLVED: To provide a driving circuit capable of more stably controlling a voltage for driving the transistor of a display device. SOLUTION: When a clock signal V i becomes high, a transistor T5 is made conductive by an output G i-4 , thereby setting a potential of one electrode of a capacity C1 high. Hence, a gate potential of the transistor T5 which is the other electrode side is increased by bootstrap, and an output G i becomes high. Then, during a writing period after the passage of three horizontal synchronous periods, data signal voltages based on gradation values of respective pixels are applied to data signal lines D 1 to D m , and the output G i falls to hold the applied voltages based on the gradation values in the pixels. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供能够更稳定地控制用于驱动显示装置的晶体管的电压的驱动电路。解决方案：当时钟信号V SB i i 变高时，晶体管T5由输出G i-4 导通，从而将一个电极的电位设定为一个容量C1高。因此，作为另一个电极侧的晶体管T5的栅极电位通过自举增加，并且输出G i 变高。然后，在经过三个水平同步时段之后的写入周期期间，基于各个像素的灰度值的数据信号电压被施加到数据信号线D 1 到D m ，并且输出G i 下降以基于像素中的灰度值来保持所施加的电压。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2011017794A Gate signal line drive circuit and display device 有权
标题翻译：门控信号线驱动电路和显示设备
公开(公告)号：JP2011017794A
公开(公告)日：2011-01-27
申请号：JP2009161117
申请日：2009-07-07
申请人： Hitachi Displays Ltd , 株式会社日立ディスプレイズ
发明人： OCHIAI TAKAHIRO , GOTO MITSURU , NAKAYASU YOZO , OKADA YUKI , TAKADA NAOKI
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20
CPC分类号： G09G3/3677 , G09G2320/043 , G11C19/28
摘要： PROBLEM TO BE SOLVED: To provide a gate signal line drive circuit and a display device which achieve the suppression of a threshold voltage of an element by use for a long time.SOLUTION: With respect to the elements to which a HIGH voltage is applied for a long time, a plurality of elements are connected in parallel to each other and are controlled such that at least any one of the plurality of elements is driven by a switching element, and a period during which the element is not driven is set longer than a frame display period.
摘要翻译：要解决的问题：提供一种通过长时间使用来实现对元件的阈值电压的抑制的栅极信号线驱动电路和显示装置。解决方案：对于施加高电压的元件，多个元件彼此并联连接并被控制为使得多个元件中的至少任一个元件由开关元件驱动，并且元件未被驱动的周期被设定为比帧显示周期。

9. 发明专利

JP2009192887A Display device 有权
标题翻译：显示设备
公开(公告)号：JP2009192887A
公开(公告)日：2009-08-27
申请号：JP2008034224
申请日：2008-02-15
申请人： Hitachi Displays Ltd , 株式会社日立ディスプレイズ
发明人： TAKADA NAOKI , KUDO YASUYUKI , KUROKAWA YOSHIKI , MANBA NORIO , KOMURA SHINICHI
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20 , G09G3/34 , G09G5/00 , G09G5/02 , H04N5/66 , H04N9/30
CPC分类号： G09G3/3607 , G09G3/3406 , G09G2320/0261 , G09G2320/0276 , G09G2320/0646 , G09G2360/16
摘要： PROBLEM TO BE SOLVED: To avoid image quality deterioration (dull) due to monotone brightness reduction in conversion of RGB pixel to RGBW pixel, and to reduce power consumption. SOLUTION: An RGB to RGBW conversion processing section 106 includes: a W generation circuit 201 which is similar with a conventional one; a sub-pixel rendering circuit 202; a W intensity calculation circuit 203 for transmitting a W intensity setting value 205 to the W generation circuit 201; and a low power backlight control circuit 204 in which a data is expanded based on the RGBW pixel generated in the sub-pixel rendering section 202, and backlight is reduced according to an amount in which the data is expanded. The input RGB data is made into an RGBW data by W intensity calculated in the W intensity calculation section 203. A backlight control signal is generated according to a data expanding amount in the sub-pixel rendering section 202. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了避免由于RGB像素到RGBW像素的转换的单调亮度降低而导致的图像质量劣化（暗淡），并且降低功耗。解决方案：RGB至RGBW转换处理部分106包括：与常规相似的W产生电路201; 子像素渲染电路202; 用于向W生成电路201发送W强度设定值205的W强度计算电路203; 以及基于在子像素渲染部202中生成的RGBW像素扩展数据的低功率背光控制电路204，根据数据扩大量减少背光。输入RGB数据通过在W强度计算部分203中计算的W强度被制成RGBW数据。根据子像素渲染部分202中的数据扩展量生成背光控制信号。版权所有（C））2009，JPO＆INPIT

10. 发明专利

JP2011008104A Display device 有权
标题翻译：显示设备
公开(公告)号：JP2011008104A
公开(公告)日：2011-01-13
申请号：JP2009152669
申请日：2009-06-26
申请人： Hitachi Displays Ltd , 株式会社日立ディスプレイズ
发明人： OKADA YUKI , GOTO MITSURU , OCHIAI TAKAHIRO , TAKADA NAOKI , NAKAYASU YOZO
IPC分类号： G09G3/36 , G02F1/133 , G09G3/20 , G11C19/00
CPC分类号： G11C19/28 , G09G3/3266 , G09G2310/0286 , G11C19/184
摘要： PROBLEM TO BE SOLVED: To provide a display device which obtains a normal scan signal by reducing a shift amount of a threshold voltage of transistors composing a scan signal line drive circuit formed on the same substrate with a display panel.SOLUTION: In order to stably control a transistor T5 controlled by a first potential node N1, each shift register circuit inputs a clock potential signal by connecting a wiring line 803 to a drain terminal of a transistor T4 so that a voltage in which a state of A>B and A>C and a state of A B and A C, or a state of A C and a state of A>B and A
摘要翻译：要解决的问题：提供一种显示装置，其通过利用显示面板减少构成在同一基板上的扫描信号线驱动电路的晶体管的阈值电压的偏移量来获得正常扫描信号。解决方案：为了稳定控制由第一电位节点N1控制的晶体管T5，每个移位寄存器电路通过将布线803连接到晶体管T4的漏极端而输入时钟电位信号，使得其中A> B和A> C和A B和A C的状态，或A C的状态和状态 A> B和A

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