Display device with light emitting elements
    1.
    发明授权
    Display device with light emitting elements 有权
    具有发光元件的显示装置

    公开(公告)号:US07221349B2

    公开(公告)日:2007-05-22

    申请号:US10841449

    申请日:2004-05-10

    IPC分类号: G09G3/36

    摘要: A display current of a whole gray scale range according to a display signal of four bits is produced from a sum of output currents of an analog current supply circuit producing a first output current according to lower data bits and two digital current supply circuits operating in accordance with corresponding data bits to execute or stop generation of second and third output currents according to higher data bits. The analog current supply circuit has a calibration function of compensating for output current variations due to transistor characteristics at one point in a control range of the first output current. A display device with light-emitting elements can accurately generate a display current for gray-scale expression without imposing an excessive load on a manufacturing process while suppressing circuit footprint.

    摘要翻译: 从根据低位数据位产生第一输出电流的模拟电流供给电路的输出电流和根据低位数据位操作的两个数字电流供给电路产生根据四位显示信号的整个灰度范围的显示电流 具有相应的数据位以根据较高数据位执行或停止产生第二和第三输出电流。 模拟电流供应电路具有校正功能,其补偿由于在第一输出电流的控制范围内的一个点处的晶体管特性引起的输出电流变化。 具有发光元件的显示装置可以精确地生成用于灰度表达的显示电流,而不会在制造过程中施加过大的负载,同时抑制电路占用面积。

    Display device
    2.
    发明授权
    Display device 有权
    显示设备

    公开(公告)号:US07570244B2

    公开(公告)日:2009-08-04

    申请号:US10513755

    申请日:2003-06-17

    IPC分类号: G09G3/36

    摘要: Signal lines for supplying signal currents to respective pixel circuits having light emitting elements are arranged. A signal line driving circuit generates, on a signal line, a signal current corresponding to the image data, by switching bit weighting currents output from bit weighting current source circuits provided for respective bits of the image data, using a switch circuit turned on/off dependent on the corresponding bit. Each current source circuit has a function of correcting the level of the bit weighting current output from itself, based on a reference current of the bit weighting current supplied from a reference current line. Therefore, even when the characteristics of TFTs forming respective current source circuits vary widely, variation in signal currents among the signal lines can be suppressed, and unevenness in emission luminance can be suppressed.

    摘要翻译: 布置用于向具有发光元件的各个像素电路提供信号电流的信号线。 信号线驱动电路通过使用开关电路接通/断开来切换信号线上产生与图像数据相对应的信号电流,通过切换由针对图像数据的各个比特设置的比特加权电流源电路输出的比特加权电流 取决于相应的位。 每个电流源电路具有基于从参考电流线提供的比特加权电流的参考电流来校正其自身输出的比特加权电流的电平的功能。 因此,即使形成各个电流源电路的TFT的特性变化很大,也可以抑制信号线之间的信号电流的变化,能够抑制发光亮度的不均匀。

    Display device
    3.
    发明申请
    Display device 有权
    显示设备

    公开(公告)号:US20050174306A1

    公开(公告)日:2005-08-11

    申请号:US10513755

    申请日:2003-06-17

    IPC分类号: G09G3/32 G09G3/30

    摘要: Signal lines for supplying signal currents to respective pixel circuits having light emitting elements are arranged. A signal line driving circuit generates, on a signal line, a signal current corresponding to the image data, by switching bit weighting currents output from bit weighting current source circuits provided for respective bits of the image data, using a switch circuit turned on/off dependent on the corresponding bit. Each current source circuit has a function of correcting the level of the bit weighting current output from itself, based on a reference current of the bit weighting current supplied from a reference current line. Therefore, even when the characteristics of TFTs forming respective current source circuits vary widely, variation in signal currents among the signal lines can be suppressed, and unevenness in emission luminance can be suppressed.

    摘要翻译: 布置用于向具有发光元件的各个像素电路提供信号电流的信号线。 信号线驱动电路通过使用开关电路接通/断开来切换信号线上产生与图像数据相对应的信号电流,通过切换由针对图像数据的各个比特设置的比特加权电流源电路输出的比特加权电流 取决于相应的位。 每个电流源电路具有基于从参考电流线提供的比特加权电流的参考电流来校正其自身输出的比特加权电流的电平的功能。 因此,即使形成各个电流源电路的TFT的特性变化很大,也可以抑制信号线之间的信号电流的变化,能够抑制发光亮度的不均匀。

    Current supply circuit and display device having the current supply circuit
    5.
    发明授权
    Current supply circuit and display device having the current supply circuit 有权
    电流供应电路和具有电流供应电路的显示装置

    公开(公告)号:US07369125B2

    公开(公告)日:2008-05-06

    申请号:US10529175

    申请日:2004-05-20

    IPC分类号: G09G5/00

    摘要: A current supply circuit providing a data line with a current corresponding to a digital signal composed of data bits includes a current control circuit, a precharge switch and a precharge regulating circuit. The current control circuit responds to control signals reflecting respective data bits to control the amount of current along the data line. The precharge switch precharges the data line to a predetermined voltage prior to current supply. The precharge regulating circuit exchanges with the data line electric charge corresponding to the control signals to move the voltage on the data line closer to a steady voltage corresponding to the data bits. In this way, an analog current corresponding to digital data can be promptly produced.

    摘要翻译: 向数据线提供与由数据位组成的数字信号相对应的电流的电流供给电路包括电流控制电路,预充电开关和预充电调节电路。 电流控制电路响应反映相应数据位的控制信号来控制沿数据线的电流量。 预充电开关在电流供应之前将数据线预充电到预定电压。 预充电调节电路与对应于控制信号的数据线电荷交换,以将数据线上的电压移动到与数据位相对应的稳定电压。 以这种方式,可以及时地产生对应于数字数据的模拟电流。

    Image display device supplied with digital signal and image display method
    6.
    发明授权
    Image display device supplied with digital signal and image display method 有权
    具有数字信号和图像显示方式的图像显示装置

    公开(公告)号:US07242378B2

    公开(公告)日:2007-07-10

    申请号:US10838248

    申请日:2004-05-05

    IPC分类号: G09G3/30

    摘要: A current supply circuit includes a bit select circuit selectively providing even-numbered bits or odd-numbered bits of eight bit image data, and supplies a gray-scale current corresponding to the bits provided from the bit select circuit to a pixel. In a one-frame period, a time length for supplying a current corresponding to the even-numbered bits to the light-emitting element is set twice as large as a time length for supplying a current corresponding to the odd-numbered bits. By setting 16 levels of the gray-scale current for four bits, a current-time product of a current passing through the light-emitting element during the one-frame period can be controlled to 256 levels for eight bits. Thereby, an image display device provided at each of the pixels with the light-emitting element can reduce sizes of circuits generating the gray-scale current in accordance with a digital signal.

    摘要翻译: 电流供给电路包括选择性地提供八位图像数据的偶数位或奇数位的位选择电路,并且将与从比特选择电路提供的比特相对应的灰度级电流提供给像素。 在一帧周期中,将与偶数位对应的电流提供给发光元件的时间长度被设置为用于提供与奇数位相对应的电流的时间长度的两倍。 通过将灰度电流的16个电平设置为四位,在一帧周期期间通过发光元件的电流的当前时间积可被控制为256位,为8位。 由此,在每个像素上设置有发光元件的图像显示装置可以根据数字信号减小产生灰度电流的电路的尺寸。

    Current supply circuit and display device having the current supply circuit
    7.
    发明申请
    Current supply circuit and display device having the current supply circuit 有权
    电流供应电路和具有电流供应电路的显示装置

    公开(公告)号:US20060038800A1

    公开(公告)日:2006-02-23

    申请号:US10529175

    申请日:2004-05-20

    IPC分类号: G09G5/00

    摘要: A current supply circuit providing a data line with a current corresponding to a digital signal composed of data bits includes a current control circuit, a precharge switch and a precharge regulating circuit. The current control circuit responds to control signal reflecting respective data bits to control the amount of current along the data line (DL). The precharge switch precharges the data line to a predetermined voltage prior to current supply. The precharge regulating circuit exchanges with the data line electric charge corresponding to the control signals to move the voltage on the data line closer to a steady voltage corresponding to the data bits. In this way, an analog current corresponding to digital data can be promptly produced.

    摘要翻译: 向数据线提供与由数据位组成的数字信号相对应的电流的电流供给电路包括电流控制电路,预充电开关和预充电调节电路。 电流控制电路响应反映各个数据位的控制信号来控制沿数据线(DL)的电流量。 预充电开关在电流供应之前将数据线预充电到预定电压。 预充电调节电路与对应于控制信号的数据线电荷交换,以将数据线上的电压移动到与数据位相对应的稳定电压。 以这种方式,可以及时地产生对应于数字数据的模拟电流。

    Liquid crystal display device
    9.
    发明授权
    Liquid crystal display device 失效
    液晶显示装置

    公开(公告)号:US06621477B1

    公开(公告)日:2003-09-16

    申请号:US09708559

    申请日:2000-11-09

    IPC分类号: G09G336

    摘要: In a color liquid crystal display device, two capacitors are connected in parallel between a pixel signal line and an electrode of a liquid cell, or one of the capacitors is connected therebetween, or none of the capacitors are connected therebetween, in order to selectively set a potential of the electrode of the liquid crystal cell in any of four steps. Therefore, gradation display in four steps can be achieved without a digital-to-analog conversion circuit, so that the cost of the device can be reduced.

    摘要翻译: 在彩色液晶显示装置中,两个电容器并联连接在像素信号线和液晶盒的电极之间,或者其中一个电容器连接在它们之间,或者没有一个电容器连接在它们之间,以便选择性地设置 液晶单元的电极的电位在四个步骤中的任一个中。 因此,无需数字 - 模拟转换电路即可实现四级梯度显示,从而可以降低器件的成本。

    Thin film transistor
    10.
    发明授权
    Thin film transistor 有权
    薄膜晶体管

    公开(公告)号:US07791073B2

    公开(公告)日:2010-09-07

    申请号:US11734390

    申请日:2007-04-12

    IPC分类号: H01L31/20

    CPC分类号: H01L27/1214 H01L29/78645

    摘要: In first and second gate electrodes constituting a gate electrode, the gate length of the second gate electrode is set shorter than the gate length of the first gate electrode and short enough to produce the short channel effect. The threshold voltage of a second transistor corresponding to the second gate electrode can thereby be made lower than the threshold voltage of a first transistor corresponding to the first gate electrode. When the same voltage is applied to the first and second gate electrodes, an electric field concentration at the channel edge on the drain side is reduced. This in result reduces the channel length modulation effect.

    摘要翻译: 在构成栅电极的第一和第二栅电极中,第二栅电极的栅极长度被设定为短于第一栅电极的栅极长度,并且足够短以产生短沟道效应。 可以使与第二栅电极对应的第二晶体管的阈值电压低于与第一栅电极对应的第一晶体管的阈值电压。 当对第一和第二栅极施加相同的电压时,漏极侧的沟道边缘处的电场浓度降低。 这在结果中减少了通道长度调制效应。