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AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorHajime Kimura
Estimating the term…
When a signal inputted to a pixel is erased by setting potentials of a gate terminal and a source terminal of a driving transistor to be equal, a current slightly flows through the driving transistor in some cases, which leads to occur a display defect. The invention provides a display device which improves the yield while suppressing the increase in manufacturing cost. When a potential of a scan line for erasure is raised, a potential of the gate terminal of the driving transistor is raised accordingly. For example, the scan line and the gate terminal of the driving transistor are connected through a rectifying element.
A semiconductor device comprising:
A semiconductor device comprising:
Dependencies are inferred from the claim text.
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Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: for presentation of an…
By time modulation using two or more time intervals: using sub-frames
Using controlled light sources: using electroluminescent panels
About 2 years 3 months of term left · ends 23 Jan 2029 (estimated)
1. Field of the Invention
The invention relates to a semiconductor device having a function to control with a transistor a current supplied to a load. In particular, the invention relates to a pixel formed of a current drive type light emitting element of which luminance changes by a current, to a display device including a scan line driver circuit and a signal line driver circuit, and to a driving method thereof. Further, the invention relates to an electronic device having the display device in the display portion.
2. Description of the Related Art
FIG. 1 is a diagram showing a pixel configuration of the invention.
FIG. 2 is a diagram showing a conventional pixel configuration.
FIG. 3 is a diagram showing a pixel configuration of the invention.
Although the invention will be fully described by way of embodiment modes and embodiments with reference to the accompanying drawings, it is to be understood that various changes and modifications will be apparent to those skilled in the art. Therefore, unless such changes and modifications depart from the scope of the invention, they should be construed as being included therein.
Description is made with reference to FIG. 49 on a basic configuration of a pixel of the invention.
A pixel shown in FIG. 49 includes a switching unit 4901, a driving unit 4902, a potential transfer unit 4903, a light emitting element 4904, a signal line 4905, a scan line 4906, and a power source line 4907. The switching unit 4901 controls conduction or no conduction between the signal line 4905 and a control terminal of the driving unit 4902. The driving unit 4902 controls driving of the light emitting element 4904 in accordance with a signal inputted to the control terminal. That is, when a signal to make a pixel emit light is inputted to the control terminal of the driving unit 4902, a power source is supplied from the power source line 4907 to the light emitting element 4904. Further, when a signal to make a pixel emit no light is inputted to the control terminal of the driving unit 4902, a power source is not supplied from the power source line 4907 to the light emitting element 4904. It is to be noted that a predetermined potential is supplied to an opposite electrode 4908 of the light emitting element 4904.