Display device
AssigneeSeiko Epson Corporation
InventorTakeo Kawase
Life of this patent
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Abstract
The invention provides a display device (26) including a plurality of discrete display segments (2). Each display segment (2) is provided with a drive circuit for driving the display elements arranged within the display area. The display device may be provided either as a passive, active or direct pixel addressed array. By interconnecting a number of display segments, a large area display can be achieved without the requirement for long electrodes. This reduces the electrical resistance and parasitic capacitance of the addressing electrodes, enabling the display to provide improved luminance in a displayed image and to operate at higher speeds, providing improved resolution. An active matrix addressing scheme can also be implemented using relatively low mobility organic thin film transistors.
Claims54
A display device comprising a plurality of display segments arranged on a substrate, each display segment having a display area of pixels defined by an array of display elements, and a drive circuit for driving the display elements and arranged within the display area.
A display device as claimed in any one of the preceding claims wherein the display elements are arranged between a passive array of cathode electrodes and a passive array of anode electrodes, and the drive circuit comprises a first drive circuit for providing signals to the array of anode electrodes and a further drive circuit for providing signals to the array of cathode electrodes.
A display device as claimed in any one of the preceding claims, wherein the substrate comprises a rigid substrate of glass, plastics or silicon.
A method for fabricating a display device comprising providing a plurality of display segments on a substrate, each having a display area of pixels defined by an array of display elements and arranging a drive circuit for driving the display elements within the display area.
A thin film transistor comprising a substrate, organic or polymer material source and drain regions each formed as a plurality of longitudinally extending sections joined at one end by a plurality of transversely extending sections and wherein the longitudinally extending sections of the source region are interdigitated with and spaced from the longitudinally extending sections of the drain region thereby to provide a serpentine shaped spacing between the source and the drain regions and the thin film transistor with a channel region having a channel length equal to the width of the spacing and a channel width extending the length of the serpentine shape spacing.
Dependencies are inferred from the claim text.