公开(公告)号：US20060007212A1

公开(公告)日：2006-01-12

申请号：US11131463

申请日：2005-05-18

申请人： Hajime Kimura ,  Jun Koyama ,  Masahiko Hayakawa ,  Yu Yamazaki ,  Yukari Ando ,  Keisuke Miyagawa

发明人： Hajime Kimura ,  Jun Koyama ,  Masahiko Hayakawa ,  Yu Yamazaki ,  Yukari Ando ,  Keisuke Miyagawa

IPC分类号： G09G5/00

CPC分类号： G09G3/3258 ,  G09G3/2014 ,  G09G3/3291 ,  G09G2300/0465 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2300/088 ,  G09G2310/0251 ,  G09G2310/0256 ,  G09G2310/066 ,  G09G2320/029 ,  G09G2320/041 ,  G09G2320/043 ,  H01L27/3244 ,  H01L2251/5323

摘要： A display device having a pixel configuration in which the aperture ratio is not decreased, and a driving method of a display device in which the duty ratio and the reliability of a light emitting element are increased. According to the invention, a signal line for inputting an analog signal, a first switch controlled by a first scan line, a second switch controlled by a second scan line, and a light emitting element connected to the second switch are included, wherein the first switch and the second switch are selected and an analog signal is inputted in a first period of one gate selection period, the first switch is selected and a reference signal is inputted from the signal line in a second period of the one gate selection period, and the light emitting element emits light by the analog signal and the reference signal.

公开(公告)号：US20050231449A1

公开(公告)日：2005-10-20

申请号：US11100898

申请日：2005-04-07

申请人： Keisuke Miyagawa

发明人： Keisuke Miyagawa

IPC分类号： G02F1/133 ,  G09G3/20 ,  G09G3/30 ,  G09G3/36 ,  H01L51/50 ,  H05B33/08 ,  H05B33/14

CPC分类号： G09G3/2022 ,  G09G3/2014 ,  G09G3/3233 ,  G09G3/3291 ,  G09G3/3648 ,  G09G2300/0842 ,  G09G2330/021 ,  G09G2360/16

摘要： A display device where the power consumption of a display panel can be reduced by controlling a display time rate. The display device includes a gray scale control circuit for controlling the display time rate of a pixel of a display means based on an output of a display time rate table that outputs a gray scale control signal for reducing the display time rate of a pixel when the average gray scale of a video signal of one frame obtained by an one frame average gray scale calculator exceeds a certain value. A display time of a pixel is controlled by erasing a video signal written to a pixel of the display means based on an output signal of the display time rate table. When an image with a high average gray scale is displayed, the luminance of the entire screen increases and power consumption increases. However, power consumption can be suppressed to a certain value by decreasing the display time rate when the average gray scale of a video signal of one frame exceeds a certain value.

摘要翻译： 可以通过控制显示时间速率来降低显示面板的功耗的显示装置。 该显示装置包括：灰度控制电路，用于根据显示时间率表的输出来控制显示装置的显示时间速率，该显示时间速率表输出用于减少像素的显示时间速率的灰度控制信号， 由一帧平均灰度计算器获得的一帧视频信号的平均灰度值超过一定值。 通过根据显示时间率表的输出信号擦除写入显示装置的像素的视频信号来控制像素的显示时间。 当显示具有高平均灰度的图像时，整个屏幕的亮度增加并且功率消耗增加。 然而，当一帧的视频信号的平均灰度级超过一定值时，通过减少显示时间速率可以将功耗抑制到一定值。

公开(公告)号：US09772221B2

公开(公告)日：2017-09-26

申请号：US12546725

申请日：2009-08-25

申请人： Kazuo Nishi ,  Yu Yamazaki ,  Tomoyuki Iwabuchi ,  Keisuke Miyagawa

发明人： Kazuo Nishi ,  Yu Yamazaki ,  Tomoyuki Iwabuchi ,  Keisuke Miyagawa

IPC分类号： H01L27/14 ,  G01J1/02 ,  G01J1/42 ,  G02F1/133 ,  G02F1/1333 ,  H04M1/02

CPC分类号： G01J1/0209 ,  G01J1/0233 ,  G01J1/0247 ,  G01J1/0271 ,  G01J1/4204 ,  G01J1/4228 ,  G02F1/13318 ,  G02F2001/133342 ,  G09G2360/04 ,  H04M1/0214 ,  H04M1/0245 ,  H04M2250/12

摘要： A photodetector of the invention is characterized by having a plurality of detector elements that are arranged over a light-transparent substrate and are connected in parallel. A foldable portable communication tool having two display portions of the invention is characterized by including one photodetector which includes a plurality of detector elements connected in parallel.

公开(公告)号：US08773333B2

公开(公告)日：2014-07-08

申请号：US13591511

申请日：2012-08-22

申请人： Keisuke Miyagawa ,  Jun Koyama

发明人： Keisuke Miyagawa ,  Jun Koyama

IPC分类号： G09G3/30

CPC分类号： H01L27/124 ,  G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2330/028

摘要： A conventional setting voltage was a value with an estimated margin of a characteristic change of a light emitting element. Therefore, a voltage between the source and drain of a driver transistor Vds had to be set high (Vds≧Vgs−VTh+a). This caused high heat generation and power consumption because a voltage applied to the light emitting element. The invention is characterized by feedbacking a change in a current value in accordance with the deterioration of a light emitting element and a power source voltage controller which modifies a setting voltage. Namely, according to the invention, the setting voltage is to be set in the vicinity of the boundary (critical part) between a saturation region and a linear region, and a voltage margin for the deterioration is not required particularly for an initial setting voltage.

摘要翻译： 传统的设定电压是具有发光元件的特性变化的估计裕量的值。 因此，必须将驱动晶体管Vds的源极和漏极之间的电压设置为高（Vds≥Vgs-VTh + a）。 这导致由于施加到发光元件的电压而导致高的发热和功率消耗。 本发明的特征在于根据改变设定电压的发光元件和电源电压控制器的劣化反馈电流值的变化。 也就是说，根据本发明，将设定电压设定在饱和区域和线性区域之间的边界（临界部分）附近，并且对初始设定电压不需要劣化的电压余量。

公开(公告)号：US20130043478A1

公开(公告)日：2013-02-21

申请号：US13591511

申请日：2012-08-22

申请人： Keisuke Miyagawa ,  Jun Koyama

发明人： Keisuke Miyagawa ,  Jun Koyama

IPC分类号： H01L33/08

CPC分类号： H01L27/124 ,  G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2330/028

摘要： A conventional setting voltage was a value with an estimated margin of a characteristic change of a light emitting element. Therefore, a voltage between the source and drain of a driver transistor Vds had to be set high (Vds≦Vgs−VTh+a). This caused high heat generation and power consumption because a voltage applied to the light emitting element. The invention is characterized by feedbacking a change in a current value in accordance with the deterioration of a light emitting element and a power source voltage controller which modifies a setting voltage. Namely, according to the invention, the setting voltage is to be set in the vicinity of the boundary (critical part) between a saturation region and a linear region, and a voltage margin for the deterioration is not required particularly for an initial setting voltage.

摘要翻译： 传统的设定电压是具有发光元件的特性变化的估计裕量的值。 因此，必须将驱动晶体管Vds的源极和漏极之间的电压设置为高（Vds＆nlE; Vgs-VTh + a）。 这导致由于施加到发光元件的电压而导致高的发热和功率消耗。 本发明的特征在于根据改变设定电压的发光元件和电源电压控制器的劣化反馈电流值的变化。 也就是说，根据本发明，将设定电压设定在饱和区域和线性区域之间的边界（临界部分）附近，并且对初始设定电压不需要劣化的电压余量。

公开(公告)号：US07817170B2

公开(公告)日：2010-10-19

申请号：US11658968

申请日：2005-07-25

申请人： Keisuke Miyagawa ,  Shou Nagao ,  Hisashi Ohtani

发明人： Keisuke Miyagawa ,  Shou Nagao ,  Hisashi Ohtani

IPC分类号： G09G5/10

CPC分类号： G09G3/3258 ,  G09G3/2029 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2320/0266

摘要： The invention provides a driving method of a semiconductor display device in which generation of a pseudo contour can be suppressed while the operating frequency of a driver circuit is suppressed. Furthermore, the invention provides a driving method of a semiconductor display device in which generation of a pseudo contour can be suppressed while the decrease in image quality is suppressed. In a semiconductor display device including a plurality of pixels, tables each storing data for determining a subframe period for light emission among a plurality of subframe periods are provided for a plurality of arbitrary pixels among the plurality of pixels respectively. The table is stored in a memory.

摘要翻译： 本发明提供了一种半导体显示装置的驱动方法，其中抑制了驱动电路的工作频率的伪轮廓的产生。 此外，本发明提供一种半导体显示装置的驱动方法，其中可以抑制图像质量的降低而抑制伪轮廓的产生。 在包括多个像素的半导体显示装置中，分别为多个像素中的多个任意像素分别设置存储用于确定多个子帧周期中的发光的子帧周期的数据的表。 表存储在内存中。

公开(公告)号：US07586324B2

公开(公告)日：2009-09-08

申请号：US11589082

申请日：2006-10-30

申请人： Keisuke Miyagawa

发明人： Keisuke Miyagawa

IPC分类号： G01R31/28

CPC分类号： G09G3/006 ,  G09G3/20 ,  G09G2300/0809 ,  G09G2300/0814 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2330/02

摘要： For an inspection of a display device which incorporates a driver circuit around pixels, a start pulse and a clock pulse are required to be inputted as inspection signals. The more complex the driver circuit is, the more complexity the start pulse and the clock pulse tend to have, which will increase the manufacturing cost of inspection signals. In addition, since a clock generator is required, cost of an inspection device is increased. Furthermore, it will lead to a longer inspection time. By setting all the power supplies for the driver circuit at a desired potential, a desired potential is outputted regardless of an input signal.

摘要翻译： 对于在像素周围包含驱动电路的显示装置的检查，需要输入起始脉冲和时钟脉冲作为检查信号。 驱动电路越复杂，启动脉冲和时钟脉冲越复杂，这将增加检测信号的制造成本。 此外，由于需要时钟发生器，检查装置的成本增加。 此外，这将导致更长的检查时间。 通过将驱动器电路的所有电源设置在期望的电位，无论输入信号如何，输出期望的电位。

公开(公告)号：US20090122049A1

公开(公告)日：2009-05-14

申请号：US12255235

申请日：2008-10-21

申请人： Keisuke Miyagawa ,  Jun Koyama

发明人： Keisuke Miyagawa ,  Jun Koyama

IPC分类号： G09G5/00

CPC分类号： H01L27/124 ,  G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2330/028

摘要： A conventional setting voltage was a value with an estimated margin of a characteristic change of a light emitting element. Therefore, a voltage between the source and drain of a driver transistor Vds had to be set high (Vds≧Vgs−VTh+a). This caused high heat generation and power consumption because a voltage applied to the light emitting element. The invention is characterized by feedbacking a change in a current value in accordance with the deterioration of a light emitting element and a power source voltage controller which modifies a setting voltage. Namely, according to the invention, the setting voltage is to be set in the vicinity of the boundary (critical part) between a saturation region and a linear region, and a voltage margin for the deterioration is not required particularly for an initial setting voltage.

摘要翻译： 传统的设定电压是具有发光元件的特性变化的估计裕量的值。 因此，驱动晶体管Vds的源极和漏极之间的电压必须设置为高（Vds> = Vgs-VTh + a）。 这导致由于施加到发光元件的电压而导致高的发热和功率消耗。 本发明的特征在于根据改变设定电压的发光元件和电源电压控制器的劣化反馈电流值的变化。 也就是说，根据本发明，将设定电压设定在饱和区域和线性区域之间的边界（临界部分）附近，并且对初始设定电压不需要劣化的电压余量。

公开(公告)号：US07453453B2

公开(公告)日：2008-11-18

申请号：US11675116

申请日：2007-02-15

申请人： Keisuke Miyagawa ,  Jun Koyama

发明人： Keisuke Miyagawa ,  Jun Koyama

IPC分类号： G09G5/00

CPC分类号： H01L27/124 ,  G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0251 ,  G09G2320/029 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2330/028

摘要： A conventional setting voltage was a value with an estimated margin of a characteristic change of a light emitting element. Therefore, a voltage between the source and drain of a driver transistor Vds had to be set high (Vds≧Vgs−VTh+a). This caused high heat generation and power consumption because a voltage applied to the light emitting element. The invention is characterized by feedbacking a change in a current value in accordance with the deterioration of a light emitting element and a power source voltage controller which modifies a setting voltage. Namely, according to the invention, the setting voltage is to be set in the vicinity of the boundary (critical part) between a saturation region and a linear region, and a voltage margin for the deterioration is not required particularly for an initial setting voltage.

摘要翻译： 传统的设定电压是具有发光元件的特性变化的估计裕量的值。 因此，驱动晶体管V ds的源极和漏极之间的电压必须被设置为高（V SUB）= V S + a）。 这导致由于施加到发光元件的电压而导致高的发热和功率消耗。 本发明的特征在于根据改变设定电压的发光元件和电源电压控制器的劣化反馈电流值的变化。 也就是说，根据本发明，将设定电压设定在饱和区域和线性区域之间的边界（临界部分）附近，并且对初始设定电压不需要劣化的电压余量。

公开(公告)号：US07268498B2

公开(公告)日：2007-09-11

申请号：US11113133

申请日：2005-04-25

申请人： Keisuke Miyagawa ,  Hajime Kimura

发明人： Keisuke Miyagawa ,  Hajime Kimura

IPC分类号： G09G3/10 ,  G09G3/30

CPC分类号： G09G3/2092 ,  G09G3/2029 ,  G09G3/3233 ,  G09G2300/0465 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2320/0233 ,  G09G2320/043 ,  G09G2320/0673 ,  G09G2330/02 ,  H01L27/1222 ,  H01L27/124 ,  H01L27/1255

摘要： The inventors found out that in the case of performing a low gray scale display in which a very small amount of current is supplied to a light emitting element, variations in threshold voltages of driving transistors become notable since the gate-source voltage is low. In view of this, the invention provides a display device in which variations in the threshold voltages of the driving transistors are reduced even in the low gray scale display, and a driving method thereof. According to the invention, a gate-source voltage of the driving transistor is set higher in the low gray scale display than that in the high gray scale display. As one mode to achieve this, different power source lines are provided for the low gray scale display and the high gray scale display and their potentials are set to be different.

摘要翻译： 本发明人发现，在执行向发光元件供应非常少量的电流的低灰度显示的情况下，由于栅极 - 源极电压低，所以驱动晶体管的阈值电压的变化变得显着。 鉴于此，本发明提供一种即使在低灰度级显示器中驱动晶体管的阈值电压的变化也减小的显示装置及其驱动方法。 根据本发明，驱动晶体管的栅极 - 源极电压在低灰度显示器中比在高灰度级显示器中高。 作为实现这一点的一种模式，为低灰度显示和高灰度显示提供不同的电源线，并且它们的电位被设置为不同。