Display device and electronic apparatus
A technology for display devices and display components, applied in lighting devices, circuits, electric light sources, etc., can solve problems such as short circuits between wiring, image quality degradation, and signal voltage changes, and achieve the effect of suppressing capacitance changes and image quality degradation
Active Publication Date: 2012-10-17
JOLED INC
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Problems solved by technology
If the parasitic capacitance increases in the intersection area of the gate electrode of the thin film transistor and its source or drain electrode, a change in signal voltage may occur, resulting in deterioration of image quality
[0003] In particular, an organic electroluminescence display device needs to have a large holding capacitance for a large parasitic capacitance, resulting in an increase in the wiring occupancy in the pixel layout
This leads to an increased probability of short circuits between wiring lines, etc., and leads to lower yields
Method used
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Embodiment approach
[0041] [structure]
[0042] figure 1 A cross-sectional structure of a display device (organic EL display device 1 ) according to an embodiment of the present invention is shown. The organic EL display device 1 includes, for example, a plurality of pixels (organic EL elements 10A) driven by an active matrix driving method. It should be noted that figure 1 Only a region corresponding to one pixel (sub-pixel) is shown. In the organic EL display device 1 , for example, a transistor 10B and a capacitive holding element 10C are provided on a substrate 10 , and an organic EL element 10A is provided on these components. The organic EL element 10A is sealed by, for example, a protective layer 22, and a sealing substrate 23 is attached to the protective layer 22 with an unillustrated adhesive layer in between. The light-emitting organic EL display device 1 may be a so-called top-emission type or bottom-emission type. The structure of each of the organic EL element 10A, the transist...
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Abstract
A display device includes a substrate, a display element, a transistor as a drive element of the display element, and a holding capacitance element holding electric charge corresponding to a video signal. The display element, the transistor, and the holding capacitance element are provided on the substrate. The holding capacitance element includes a first semiconductor layer including an oxide semiconductor, a first conductive film provided on the first semiconductor layer, a first insulating film provided between the first semiconductor layer and the first conductive film, and a recess formed by removing part or all in thickness of the first conductive film and the first insulating film in a selective region on the first semiconductor layer.
Description
technical field [0001] The present invention relates to a display device preferably used for an organic electroluminescent (EL) display device and a liquid crystal display device, and to electronic equipment including the display device. Background technique [0002] In an actively driven liquid crystal display device or an organic electroluminescent display device, a thin film transistor is used as a driving element, and a capacitive holding element holds charges corresponding to a signal voltage for writing a video image. If the parasitic capacitance increases in the intersection region of the gate electrode of the thin film transistor and its source or drain electrode, a change in signal voltage may occur, resulting in image quality degradation. [0003] In particular, an organic electroluminescence display device needs to have a large holding capacity for a large parasitic capacity, resulting in an increase in wiring occupancy in a pixel layout. This leads to an increas...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01L27/02H01L29/94H01L27/32G02F1/1368H05B44/00
CPCG02F1/136213H01L27/3265H01L27/1225H01L27/1255H10K59/1216H01L23/5389
Inventor 诸沢成浩
Owner JOLED INC