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：US08013809B2

公开(公告)日：2011-09-06

申请号：US11151702

申请日：2005-06-14

申请人： Masahiko Hayakawa ,  Yu Kojima ,  Yukari Ando ,  Keisuke Miyagawa ,  Jun Koyama ,  Mitsuaki Osame ,  Aya Anzai ,  Shunpei Yamazaki ,  Satoshi Seo ,  Hiroko Abe ,  Hajime Kimura

发明人： Masahiko Hayakawa ,  Yu Kojima ,  Yukari Ando ,  Keisuke Miyagawa ,  Jun Koyama ,  Mitsuaki Osame ,  Aya Anzai ,  Shunpei Yamazaki ,  Satoshi Seo ,  Hiroko Abe ,  Hajime Kimura

IPC分类号： G09G3/30

CPC分类号： G09G3/3216 ,  G09G3/2018 ,  G09G3/3283 ,  G09G3/3291 ,  G09G2300/0426 ,  G09G2320/0233 ,  G09G2320/029 ,  G09G2320/041 ,  G09G2320/043

摘要： The brightness of a light emitting element varies when changes in ambient temperature or changes with time occur. In view of this, the invention provides a display device where the influence of variations in the current value of the light emitting element due to changes in ambient temperature and changes with time can be suppressed. The display device of the invention includes a monitoring element that is driven with a constant current, and a voltage applied to the monitoring element is detected and inputted to a light emitting element. In other words, the monitoring element is driven with a low current, and a voltage applied to the monitoring element is inputted to the light emitting element such that the light emitting element is driven with a constant current.

摘要翻译： 随着环境温度的变化或时间的变化，发光元件的亮度发生变化。 鉴于此，本发明提供了一种显示装置，其中可以抑制由于环境温度的变化和随时间的变化而导致的发光元件的电流值的变化的影响。 本发明的显示装置包括以恒定电流驱动的监视元件，并且检测施加到监视元件的电压并将其输入到发光元件。 换句话说，监视元件以低电流驱动，并且施加到监视元件的电压被输入到发光元件，使得发光元件以恒定电流驱动。

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：US20100020060A1

公开(公告)日：2010-01-28

申请号：US12573998

申请日：2009-10-06

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：US07592991B2

公开(公告)日：2009-09-22

申请号：US11147527

申请日：2005-06-08

申请人： Aya Anzai ,  Mitsuaki Osame ,  Yoshifumi Tanada ,  Keisuke Miyagawa ,  Satoshi Seo ,  Shunpei Yamazaki

发明人： Aya Anzai ,  Mitsuaki Osame ,  Yoshifumi Tanada ,  Keisuke Miyagawa ,  Satoshi Seo ,  Shunpei Yamazaki

IPC分类号： G09G3/36

CPC分类号： G09G3/3266 ,  G09G3/2022 ,  G09G3/3258 ,  G09G3/3291 ,  G09G3/3655 ,  G09G2300/0408 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2300/0847 ,  G09G2300/0866 ,  G09G2310/0251 ,  G09G2310/0256 ,  G09G2310/0262 ,  G09G2310/027 ,  G09G2310/0278 ,  G09G2320/043 ,  G09G2330/021 ,  H01L27/3244

摘要： The reliability of an EL element is enhanced while the increase of the electric power consumption is suppressed. It becomes possible that in a SES drive, the reverse bias is applied to the EL element driven at a constant electric current. Moreover, the application of the reverse bias is performed by varying only the counter electrode, and thus withstand voltage of TFT and the increase of the electric power consumption due to the increase of voltage of the gate signal line drive circuit, which becomes a problem when changing greatly the electric current supplying line, can be suppressed. Furthermore, the reduction of the electric power consumption can also be achieved while the enhancement of the reliability is secured by making the reverse bias smaller than the forward bias. Moreover, the increase of the number of electric sources can be also suppressed by making the potential be in common with the potential of the electric source of the source signal line drive circuit or the gate signal line drive circuit, at the time when the reverse bias is applied.

摘要翻译： 在抑制电力消耗的增加的同时，增强了EL元件的可靠性。 可能的是，在SES驱动中，反向偏压被施加到以恒定电流驱动的EL元件。 此外，通过仅改变对置电极，因此耐受TFT的电压和由于栅极信号线驱动电路的电压的增加而导致的电力消耗的增加来执行反向偏置的应用，这成为问题 可以大大改变电流供应线路，可以抑制。 此外，还可以通过使反向偏压小于正向偏压来确保提高可靠性，同时可以实现功耗的降低。 此外，通过使电位与源极信号线驱动电路或栅极信号线驱动电路的电位的电位相同，也可以抑制电源数量的增加，反向偏置 被申请;被应用。

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。