-
公开(公告)号：US10672329B2
公开(公告)日：2020-06-02
申请号：US16530361
申请日：2019-08-02
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Mitusaki Osame , Aya Anzai , Yoshifumi Tanada , Keisuke Miyagawa , Satoshi Seo , Shunpei Yamazaki
IPC: G09G3/32 , G09G3/3266 , G09G3/3291 , G09G3/3258 , H01L33/00 , G09G3/3233
Abstract: A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.
-
公开(公告)号：US08872868B2
公开(公告)日：2014-10-28
申请号：US13676171
申请日：2012-11-14
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Keisuke Miyagawa , Ryota Fukumoto
CPC classification number: G09G3/3291 , G09G3/2022 , G09G2300/0809 , G09G2300/0842 , G09G2300/0861 , G09G2310/0256 , G09G2310/061 , G09G2320/0233 , G09G2320/0252 , G09G2320/043
Abstract: If a potential of a gate electrode of a driving transistor varies after a gray scale signal is inputted into each pixel, a current value of a current supplied to a light emitting element varies so that accurate gray scale display cannot be obtained. In particular, in the case of performing black display, current may flow, which makes clear black display difficult. Accordingly, the invention provides a light emitting device capable of performing accurate gray scale display, and a driving method thereof. According to the invention, a signal for display is inputted plural times within a predetermined timing period, or a writing operation period is lengthened. Consequently, the gate voltage of the transistor is determined after the anode potential of the light emitting element is stabilized, and therefore accurate gray scale display can be performed.
Abstract translation: 如果在将灰度信号输入每个像素之后驱动晶体管的栅电极的电位变化，则提供给发光元件的电流的电流值变化，使得不能获得准确的灰度显示。 特别地，在执行黑色显示的情况下，电流可能流动，这使得清晰的黑色显示变得困难。 因此，本发明提供能够进行精确的灰度显示的发光装置及其驱动方法。 根据本发明，用于显示的信号在预定定时周期内被多次输入，或者写入操作期间被延长。 因此，在发光元件的阳极电位稳定之后确定晶体管的栅极电压，因此可以执行精确的灰度显示。
-
公开(公告)号：US10373550B2
公开(公告)日：2019-08-06
申请号：US16027892
申请日：2018-07-05
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Mitsuaki Osame , Aya Anzai , Yoshifumi Tanada , Keisuke Miyagawa , Satoshi Seo , Shunpei Yamazaki
IPC: G09G3/32 , H01L33/00 , G09G3/3233 , G09G3/3258 , G09G3/3266 , G09G3/3291
Abstract: A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.
-
公开(公告)号：US08988324B2
公开(公告)日：2015-03-24
申请号：US14186600
申请日：2014-02-21
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Mitsuaki Osame , Aya Anzai , Yoshifumi Tanada , Keisuke Miyagawa , Satoshi Seo , Shunpei Yamazaki
CPC classification number: G09G3/32 , G09G3/3233 , G09G3/3258 , G09G3/3266 , G09G3/3291 , G09G2300/043 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/0251 , G09G2310/0256 , G09G2310/027 , G09G2310/061 , G09G2310/08 , G09G2320/043 , G09G2320/045 , H01L33/0041
Abstract: A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.
-
公开(公告)号：US20130070001A1
公开(公告)日：2013-03-21
申请号：US13676171
申请日：2012-11-14
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Keisuke Miyagawa , Ryota Fukumoto
IPC: G09G5/10
CPC classification number: G09G3/3291 , G09G3/2022 , G09G2300/0809 , G09G2300/0842 , G09G2300/0861 , G09G2310/0256 , G09G2310/061 , G09G2320/0233 , G09G2320/0252 , G09G2320/043
Abstract: If a potential of a gate electrode of a driving transistor varies after a gray scale signal is inputted into each pixel, a current value of a current supplied to a light emitting element varies so that accurate gray scale display cannot be obtained. In particular, in the case of performing black display, current may flow, which makes clear black display difficult. Accordingly, the invention provides a light emitting device capable of performing accurate gray scale display, and a driving method thereof. According to the invention, a signal for display is inputted plural times within a predetermined timing period, or a writing operation period is lengthened. Consequently, the gate voltage of the transistor is determined after the anode potential of the light emitting element is stabilized, and therefore accurate gray scale display can be performed.
Abstract translation: 如果在将灰度信号输入每个像素之后驱动晶体管的栅电极的电位变化，则提供给发光元件的电流的电流值变化，使得不能获得准确的灰度显示。 特别地，在执行黑色显示的情况下，电流可能流动，这使得清晰的黑色显示变得困难。 因此，本发明提供能够进行精确的灰度显示的发光装置及其驱动方法。 根据本发明，用于显示的信号在预定定时周期内被多次输入，或者写入操作期间被延长。 因此，在发光元件的阳极电位稳定之后确定晶体管的栅极电压，因此可以执行精确的灰度显示。
-
Patent Agency Ranking
公开(公告)号：US09697772B2
公开(公告)日：2017-07-04
申请号：US15271578
申请日：2016-09-21
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Mitsuaki Osame , Aya Anzai , Yoshifumi Tanada , Keisuke Miyagawa , Satoshi Seo , Shunpei Yamazaki
IPC: G09G3/32 , G09G3/3233 , G09G3/3258 , G09G3/3266 , G09G3/3291 , H01L33/00
CPC classification number: G09G3/32 , G09G3/3233 , G09G3/3258 , G09G3/3266 , G09G3/3291 , G09G2300/043 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/0251 , G09G2310/0256 , G09G2310/027 , G09G2310/061 , G09G2310/08 , G09G2320/043 , G09G2320/045 , H01L33/0041
Abstract: A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.
-
公开(公告)号：US09454933B2
公开(公告)日：2016-09-27
申请号：US14662775
申请日：2015-03-19
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Mitsuaki Osame , Aya Anzai , Yoshifumi Tanada , Keisuke Miyagawa , Satoshi Seo , Shunpei Yamazaki
CPC classification number: G09G3/32 , G09G3/3233 , G09G3/3258 , G09G3/3266 , G09G3/3291 , G09G2300/043 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/0251 , G09G2310/0256 , G09G2310/027 , G09G2310/061 , G09G2310/08 , G09G2320/043 , G09G2320/045 , H01L33/0041
Abstract: A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.
-
公开(公告)号：US20150194095A1
公开(公告)日：2015-07-09
申请号：US14662775
申请日：2015-03-19
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Mitsuaki Osame , Aya Anzai , Yoshifumi Tanada , Keisuke Miyagawa , Satoshi Seo , Shunpei Yamazaki
CPC classification number: G09G3/32 , G09G3/3233 , G09G3/3258 , G09G3/3266 , G09G3/3291 , G09G2300/043 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/0251 , G09G2310/0256 , G09G2310/027 , G09G2310/061 , G09G2310/08 , G09G2320/043 , G09G2320/045 , H01L33/0041
Abstract: A light emitting device that achieves long life, and which is capable of performing high duty drive, by suppressing initial light emitting element deterioration is provided. Reverse bias application to an EL element (109) is performed one row at a time by forming a reverse bias electric power source line (112) and a reverse bias TFT (108). Reverse bias application can therefore be performed in synchronous with operations for write-in of an image signal, light emission, erasure, and the like. Reverse bias application therefore becomes possible while maintaining a duty equivalent to that of a conventional driving method.
-
公开(公告)号：US09997099B2
公开(公告)日：2018-06-12
申请号：US14939479
申请日：2015-11-12
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Keisuke Miyagawa , Hajime Kimura
IPC: G09G3/20 , H01L27/12 , G09G3/3233
CPC classification number: 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
Abstract: 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.
-
公开(公告)号：US09398178B2
公开(公告)日：2016-07-19
申请号：US13754947
申请日：2013-01-31
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Keisuke Miyagawa , Shunpei Yamazaki
CPC classification number: H04N7/144 , H04N1/00129 , H04N1/00307 , H04N5/23293
Abstract: A compact and lightweight display device having an image pickup function and a two-way communication system which can shoot an image of a user as an object and display an image at the same time without degrading image quality by disposing a semi-transmitting mirror or the like which blocks an image on the display screen (display plane). The display device having the image pickup function includes a display panel capable of transmitting visible light at least and arranging display elements which can be controlled by voltage or current, and an image pickup device disposed around the display panel. The image pickup device is input with data of an image of a user or the like by a reflector, or equipped with a fiberscope bundling optical fibers.
-
-
-
-
-
-
-
-
-
Search Results
23
records
(took 0.018 seconds)
