公开(公告)号：US20100295872A1

公开(公告)日：2010-11-25

申请号：US12780915

申请日：2010-05-16

申请人： Yusuke UCHIDA ,  Yukari KATAYAMA ,  Akihito AKAI ,  Yoshiki KUROKAWA

发明人： Yusuke UCHIDA ,  Yukari KATAYAMA ,  Akihito AKAI ,  Yoshiki KUROKAWA

IPC分类号： G09G5/00 ,  G09G3/36 ,  G06T9/00

CPC分类号： G09G3/3611 ,  G09G2320/0252 ,  G09G2320/0261 ,  G09G2340/16 ,  G09G2354/00

摘要： The present invention is directed to improve efficiency in use of a memory for storing display data which is used for an overdrive process. A display driver for driving a display device compresses image display data, stores the compressed data into a memory, and generates a preceding frame by decompressing the data read from the memory. A setting unit divides a display screen of the display device into, for example, a first region as a center part and a second region as a peripheral part. An overdrive computing unit generates overdrive display data in response to a present-time frame and the preceding frame, compresses the image display data in the first and second regions at first and second data compression ratios of small and large values, respectively, and stores the compressed data into the memory. By saving the space of the memory, the picture quality in the first region is improved.

摘要翻译： 本发明旨在提高用于存储用于过驱动过程的显示数据的存储器的使用效率。 用于驱动显示装置的显示驱动器压缩图像显示数据，将压缩数据存储到存储器中，并且通过解压缩从存储器读取的数据来生成前一帧。 设置单元将显示设备的显示屏划分为例如作为中心部分的第一区域和作为周边部分的第二区域。 过驱动计算单元响应于当前帧和前一帧产生过驱动显示数据，分别以小值和大值的第一和第二数据压缩比压缩第一和第二区域中的图像显示数据，并存储 将数据压缩到内存中。 通过节省存储器的空间，改善了第一区域中的图像质量。

公开(公告)号：US20130044146A1

公开(公告)日：2013-02-21

申请号：US13647710

申请日：2012-10-09

申请人： Yoshiki KUROKAWA ,  Yukari KATAYAMA ,  Hiroki AWAKURA ,  Naoki TAKADA ,  Yasuyuki KUDO ,  Akihito AKAI ,  Goki TOSHIMA ,  Akihisa AOYAMA ,  Goro SAKAMAKI

发明人： Yoshiki KUROKAWA ,  Yukari KATAYAMA ,  Hiroki AWAKURA ,  Naoki TAKADA ,  Yasuyuki KUDO ,  Akihito AKAI ,  Goki TOSHIMA ,  Akihisa AOYAMA ,  Goro SAKAMAKI

IPC分类号： G09G5/10 ,  G09G5/00

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，并且通过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：US20090289965A1

公开(公告)日：2009-11-26

申请号：US12467648

申请日：2009-05-18

申请人： Yoshiki KUROKAWA ,  Yukari KATAYAMA ,  Yasuyuki KUDO ,  Akihito AKAI ,  Hiroyuki NITTA ,  Kazuki HOMMA

发明人： Yoshiki KUROKAWA ,  Yukari KATAYAMA ,  Yasuyuki KUDO ,  Akihito AKAI ,  Hiroyuki NITTA ,  Kazuki HOMMA

IPC分类号： G09G3/36 ,  G09G5/10

CPC分类号： G09G3/3406 ,  B60K2370/33 ,  B60K2370/42 ,  G09G3/2092 ,  G09G3/3413 ,  G09G5/363 ,  G09G2320/0238 ,  G09G2320/041 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/0673 ,  G09G2360/145

摘要： A liquid crystal driving device is provided, which can reduce the problem of contrast lowering of the liquid crystal display screen due to the decrease of the driving current of LED, by the control which is performed in order to cope with the decrease of the maximum rated current of LED as a light source of the backlight at a high temperature. The liquid crystal driving device includes a liquid crystal driving circuit, a backlight control unit, and display data expansion circuits. The liquid crystal driving circuit generates a liquid crystal driving signal to be supplied to a liquid crystal display panel in response to display data. The backlight control unit reduces driving current of the light emitting diode as a light source of the backlight module to illuminate the liquid crystal display panel, in response to the temperature rise of the liquid crystal display panel. The display data expansion circuit, in response to the temperature rise of the liquid crystal display panel, performs the data expansion of the display data, and compensates the contrast lowering of the liquid crystal display panel due to the dimming of the backlight module with the temperature rise of the liquid crystal display panel.

摘要翻译： 提供一种液晶驱动装置，通过进行控制，可以减少由于LED的驱动电流的降低导致的液晶显示屏的对比度下降的问题，以便应对最大额定值的降低 LED作为高温背光源的电流。 液晶驱动装置包括液晶驱动电路，背光控制单元和显示数据扩展电路。 液晶驱动电路根据显示数据产生供给液晶显示面板的液晶驱动信号。 背光控制单元响应于液晶显示面板的温度升高，降低作为背光模块的光源的发光二极管的驱动电流，以照亮液晶显示面板。 显示数据扩展电路响应于液晶显示面板的温度升高，执行显示数据的数据扩展，并补偿由于背光模块的温度随温度而变暗的液晶显示面板的对比度降低 上升的液晶显示面板。

公开(公告)号：US20110242120A1

公开(公告)日：2011-10-06

申请号：US12750773

申请日：2010-03-31

申请人： Akihito AKAI ,  Yoshiki Kurokawa ,  Goki Toshima

发明人： Akihito AKAI ,  Yoshiki Kurokawa ,  Goki Toshima

IPC分类号： G06F13/00

CPC分类号： G09G3/3406 ,  G09G2320/0646 ,  G09G2360/16

摘要： The display unit can reduce the electric power consumed by the process of calculating an adjustment coefficient for display data, as typified by gradient control, and it can be readily adapted even to a display panel with a higher resolution. The display unit includes: a plurality of driving units arrayed in parallel and each operable to output a drive signal to a display panel; a plurality of first calculation units, and a plurality of display RAMs, each paired with one first calculation unit, the pairs of the first calculation units and display RAMs laid out along a direction of the parallel array of the driving units; and a second calculation unit which distributes display data supplied from outside to the display RAMs, receives display data from the display RAMs in parallel to analyze a histogram of tone distribution of pixel data corresponding to one screen, and calculates the adjustment coefficient based on a result of the analysis. In the display unit, the adjustment coefficient thus calculated is sent back to the first calculation units. The first calculation unit performs a calculation using display data read from the corresponding display RAM and the adjustment coefficient thereby to create drive data for the display panel.

摘要翻译： 显示单元可以通过梯度控制代表的计算显示数据的调整系数的处理来减少消耗的电力，并且可以容易地适应于具有更高分辨率的显示面板。 显示单元包括：并行排列的多个驱动单元，每个驱动单元可操作以将驱动信号输出到显示面板; 多个第一计算单元和多个显示RAM，每个显示RAM与一个第一计算单元配对，沿着驱动单元的并行阵列的方向布置的第一计算单元和显示RAM对; 以及第二计算单元，其将从外部提供的显示数据分配到显示RAM，并行地从显示RAM接收显示数据，以分析与一个屏幕相对应的像素数据的色调分布的直方图，并且基于结果计算调整系数 的分析。 在显示单元中，将如此计算的调整系数发送回第一计算单元。 第一计算单元使用从对应的显示RAM读取的显示数据和调整系数进行计算，从而创建显示面板的驱动数据。

公开(公告)号：US20090303264A1

公开(公告)日：2009-12-10

申请号：US12470526

申请日：2009-05-22

申请人： Goki TOSHIMA ,  Yasuyuki KUDO ,  Yoshiki KUROKAWA ,  Akihito AKAI ,  Kazuki HOMMA

发明人： Goki TOSHIMA ,  Yasuyuki KUDO ,  Yoshiki KUROKAWA ,  Akihito AKAI ,  Kazuki HOMMA

IPC分类号： G09G5/10

CPC分类号： G09G3/3648 ,  G09G3/3406 ,  G09G2320/0242 ,  G09G2320/0271 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2330/021 ,  G09G2360/16

摘要： A liquid crystal driving device includes a liquid crystal controller and specific color expansion circuits. The liquid crystal controller generates a liquid crystal drive signal to be supplied to a liquid crystal display panel in response to display data. The specific color expansion circuits generate an image output signal from a low-intensity image input signal corresponding to a specific color by intensifying a gradation using a specified factor. The specific color expansion circuits generate an image output signal from a high-intensity image input signal corresponding to a specific color by intensifying a gradation using another small factor. The image output signal is appropriately intensified by the specific color expansion circuits and is supplied as display data to the liquid crystal controller.

摘要翻译： 液晶驱动装置包括液晶控制器和特定颜色扩展电路。 液晶控制器根据显示数据产生供应给液晶显示面板的液晶驱动信号。 特定颜色扩展电路通过使用规定的因子增强灰度，从与特定颜色相对应的低强度图像输入信号生成图像输出信号。 特定颜色扩展电路通过使用另一小因素强化灰度，从与特定颜色对应的高强度图像输入信号生成图像输出信号。 图像输出信号由特定的色彩扩展电路适当增强，并作为显示数据提供给液晶控制器。

公开(公告)号：US20080218500A1

公开(公告)日：2008-09-11

申请号：US12023379

申请日：2008-01-31

申请人： Akihito AKAI ,  Yasuyuki Kudo ,  Kazuo Okado

发明人： Akihito AKAI ,  Yasuyuki Kudo ,  Kazuo Okado

IPC分类号： G09G5/00

CPC分类号： G09G3/3688 ,  G09G3/2025 ,  G09G2310/0205 ,  G09G2310/027 ,  G09G2310/0281 ,  G09G2310/0289 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2340/0414 ,  G09G2340/0421

摘要： A liquid crystal display device includes, in one of an even row and an odd row of a liquid crystal panel, a switch for short-circuiting, for example, an even signal line and an odd signal line adjacent on the left side to the even signal line, and a switch for short-circuiting the even signal line and an odd signal line adjacent on the right side to the even signal line provided at an output part of the signal-line driver. By controlling these switches, enlarged display equivalent to the bilinear processing is realized in a horizontal direction. By scanning two scanning lines simultaneously, simple enlarged display is realized in a vertical direction on the panel. Further, by stopping supply of a steady current to an operational amplifier applying data voltage to the even signal line, enlarged display at a low cost and at low power consumption is realized.

摘要翻译： 液晶显示装置包括在液晶面板的偶数行和奇数行之一中的短路用开关，例如在左侧相邻的偶数信号线和奇数信号线 信号线，以及将偶数信号线和右侧相邻的奇数信号线短路到设置在信号线驱动器的输出部分的偶数信号线的开关。 通过控制这些开关，在水平方向上实现与双线性处理相当的放大显示。 通过同时扫描两条扫描线，在面板上沿垂直方向实现简单的放大显示。 此外，通过停止向对偶信号线施加数据电压的运算放大器供给稳定电流，实现了低成本且低功耗的放大显示。

公开(公告)号：US20120139972A1

公开(公告)日：2012-06-07

申请号：US13372814

申请日：2012-02-14

申请人： Yasuyuki KUDO ,  Akihito AKAI ,  Kazuo OOKADO ,  Kazunari KUROKAWA ,  Hiroki AIZAWA

发明人： Yasuyuki KUDO ,  Akihito AKAI ,  Kazuo OOKADO ,  Kazunari KUROKAWA ,  Hiroki AIZAWA

IPC分类号： G09G3/36 ,  G09G5/02 ,  G09G5/10

CPC分类号： G09G3/3607 ,  G09G3/3614 ,  G09G3/3688 ,  G09G3/3696 ,  G09G2310/027 ,  G09G2320/0276 ,  G09G2320/0606 ,  G09G2320/0673

摘要： Display driving arrangements including: generation circuit dividing a reference voltage by variable resistors for plural levels of voltages; a decoder circuit decoding gray scale voltage corresponding to the display data among the levels of voltages; and a register setting variable resisters resistance values to adjust amplitude and gradient of the gamma characteristic curve of the gray scale voltages with respect to the gray scale number, the generation circuit having a group of resistive voltage dividing circuits dividing the reference voltage, a variable resister amplitude adjusting the gamma characteristic curve in accordance with register setting values connected with a side of the reference voltage in series, being closer to the side of the reference voltage than the group of resistive voltage dividing circuits, a variable resister to adjust the gradient of the gamma characteristic curve per the register setting values connected within the group of resistive voltage dividing circuits in series.

摘要翻译： 显示驱动装置包括：通过可变电阻器对多个电压电平分压参考电压的发电电路; 解码器电路，解码与电压电平之间的显示数据相对应的灰度级电压; 并且寄存器设置变量阻止电阻值以调整相对于灰度级数的灰度级电压的伽马特性曲线的幅度和梯度，所述发生电路具有划分参考电压的一组电阻分压电路，可变电阻器 根据与参考电压的一侧串联连接的寄存器设定值来调整伽马特性曲线，其比基于电阻分压电路的组更接近参考电压的一侧;变阻器，用于调整 每个串联的电阻分压电路组内的寄存器设定值的伽马特性曲线。

公开(公告)号：US20120287081A1

公开(公告)日：2012-11-15

申请号：US13467214

申请日：2012-05-09

申请人： Akihito AKAI ,  Tatsuya ISHII ,  Kazuya ENDO ,  Shinobu NOTOMI ,  Akihiro KODAMA

发明人： Akihito AKAI ,  Tatsuya ISHII ,  Kazuya ENDO ,  Shinobu NOTOMI ,  Akihiro KODAMA

IPC分类号： G06F3/044

CPC分类号： G06F3/044 ,  G02F1/13338 ,  G06F3/0416 ,  G09G3/2092

摘要： Provided is a touch sensor panel which can increase the detection sensitivity of a touch relatively readily. The touch sensor panel controller supplies drive electrodes of a touch sensor panel with a high-voltage AC drive signal with its low level set to a negative voltage and drives them. The time of change of a drive waveform supplied to the drive electrodes of the touch sensor panel is shifted relative to the time of change of a drive waveform supplied to a display scan electrode. The touch sensor panel controller uses a charge pump in synchronization with clock signals of more than one phase to produce a high drive voltage to activate drive electrodes of the touch sensor panel, and the clock signals of more than one phase are initialized each time the drive electrode is subjected to AC pulse driving.

摘要翻译： 提供了可以相对容易地增加触摸的检测灵敏度的触摸传感器面板。 触摸传感器面板控制器为触摸传感器面板的驱动电极提供高电压交流驱动信号，其低电平设置为负电压并驱动它们。 提供给触摸传感器面板的驱动电极的驱动波形的变化时间相对于提供给显示扫描电极的驱动波形的变化时间移动。 触摸传感器面板控制器使用与多于一相的时钟信号同步的电荷泵来产生高驱动电压以激活触摸传感器面板的驱动电极，并且每次驱动器初始化多于一相的时钟信号 电极进行交流脉冲驱动。

公开(公告)号：US20110148953A1

公开(公告)日：2011-06-23

申请号：US13037755

申请日：2011-03-01

申请人： Yasuyuki KUDO ,  Akihito AKAI ,  Kazuo OOKADO ,  Kazunari KUROKAWA ,  Atsuhiro HIGA

发明人： Yasuyuki KUDO ,  Akihito AKAI ,  Kazuo OOKADO ,  Kazunari KUROKAWA ,  Atsuhiro HIGA

IPC分类号： G09G5/10

CPC分类号： G09G3/2092 ,  G09G3/20 ,  G09G3/2011 ,  G09G3/3614 ,  G09G3/3688 ,  G09G3/3696 ,  G09G2310/027 ,  G09G2320/0626 ,  G09G2320/066 ,  G09G2320/08 ,  G09G2330/021 ,  G09G2330/028 ,  G09G2360/18 ,  H03F3/347 ,  H03F3/45475

摘要： A display driver having a first mode where a number of colors to be displayed is smaller than a predetermined number and a second mode where a number of colors to be displayed is equal to or larger than the predetermined number. A generation circuit generates gray scale voltages having a plurality of levels for positive polarity and negative polarity. In the first mode, the generation circuit decreases a current flowing into an internal circuit which generates a gray scale voltage of an intermediate level other than two gray scale voltages of a lowest and a highest level, in comparison to a current flowing in the second mode. In the first mode, the selection circuit selects a gray scale voltage in accordance with the display data, from the two gray scale voltages of the lowest and the highest level gray scale voltage which are generated from the generation circuit.

摘要翻译： 具有要显示的颜色数量小于预定数量的第一模式的显示驱动器和要显示的颜色数量等于或大于预定数量的第二模式。 一代电路产生具有正极性和负极性的多个电平的灰度电压。 在第一模式中，与在第二模式中流动的电流相比，生成电路减少流入内部电路的电流，该内部电路产生除了最低和最高电平的两个灰度级电压之外的中间电平的灰度电压 。 在第一模式中，选择电路根据从生成电路产生的最低和最高电平灰度级电压的两个灰度级电压，根据显示数据选择灰度级电压。

公开(公告)号：US20100013818A1

公开(公告)日：2010-01-21

申请号：US12470672

申请日：2009-05-22

申请人： Akihito AKAI ,  Hiroyuki NITTA

发明人： Akihito AKAI ,  Hiroyuki NITTA

IPC分类号： G06F3/038

CPC分类号： G09G3/3651 ,  G06F3/147 ,  G09G3/2092 ,  G09G3/3688 ,  G09G3/3696 ,  G09G2310/0289 ,  G09G2330/022 ,  G09G2370/16 ,  G09G2380/02 ,  G09G2380/04 ,  G09G2380/14

摘要： The present invention is directed to reduce power consumption in a standby operation period as a period of holding display in a no-power state. An electronic paper display has an electronic paper display panel, a display driver/controller, a battery, and a booster power source circuit. The display panel can display data by writing display data and, after that, can hold the display in a no-power state. The booster power source circuit generates a boosted power source voltage by an operation of boosting power source voltage from the battery, and the display driver/controller executes the writing of the displayed data to the display panel by using the boosted power source voltage. In the following standby operation period in which the display panel holds the display in the no-power state, the boosting operation of the booster power source circuit is stopped.

摘要翻译： 本发明旨在将待机操作期间的功耗降低为在无功状态下保持显示的周期。 电子纸显示器具有电子纸显示面板，显示驱动器/控制器，电池和升压电源电路。 显示面板可以通过写入显示数据来显示数据，然后可以将显示器保持在无功率状态。 升压电源电路通过从电池提高电源电压的动作来产生升压的电源电压，显示驱动器/控制器通过使用升压的电源电压来执行将显示的数据写入显示面板。 在随后的待机操作期间，显示面板将显示器保持在无功率状态，停止升压电源电路的升压操作。