EL display apparatus
First Claim
1. An electroluminescent (EL) display apparatus comprising:
- a display screen including a plurality of gate signal lines which is arranged to intersect a plurality of source signal lines, and a pixel corresponding to each intersection of the plurality of gate signal lines and the plurality of source signal lines;
a source driver circuit connected to the plurality of source signal lines; and
a gate driver circuit which includes a first gate driver circuit and a second gate driver circuit,wherein each pixel comprises;
an EL device;
a driving transistor to supply a current to the EL device;
a first switch transistor provided on a current path through which the current is supplied by the driving transistor to the EL device;
a second switch transistor provided to supply, to the driving transistor, an image signal supplied to a corresponding one of the plurality of source signal lines;
a third switch transistor provided between a gate terminal and a drain terminal of the driving transistor; and
a capacitor connected to the gate terminal of the driving transistor for holding the image signal,the third switch transistor has a multi-gate structure,the source driver circuit is configured to supply a signal voltage to the gate of the driving transistor to flow a current which is N times as large as a predetermined value to the EL device,N is greater than one,the first gate driver circuit includes a first gate signal line and the second gate driver circuit includes a second gate signal line,the first gate signal line is an on/off signal for the first switch transistor and is connected to a gate terminal of the first switch transistor, andthe second gate signal line is an on/off signal for the second switch transistor and the third switch transistor and is connected to a gate terminal of the second switch transistor and a gate terminal of the third switch transistor.
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Accused Products
Abstract
An electroluminescent (EL) display apparatus and manufacturing method are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel corresponds to each intersection of the gate signal lines and the source signal lines. Each pixel includes: an EL device; a driving transistor to supply a current to the EL device; a first switch transistor through which the current is supplied by the driving transistor to the EL device; a second switch transistor provided to supply, to the driving transistor, an image signal supplied to a corresponding one of the source signal lines; a third switch transistor provided between a gate terminal and a drain terminal of the driving transistor; and a capacitor connected to the gate terminal of the driving transistor for holding the image signal. The third switch transistor has a multi-gate structure.
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Citations
18 Claims
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1. An electroluminescent (EL) display apparatus comprising:
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a display screen including a plurality of gate signal lines which is arranged to intersect a plurality of source signal lines, and a pixel corresponding to each intersection of the plurality of gate signal lines and the plurality of source signal lines; a source driver circuit connected to the plurality of source signal lines; and a gate driver circuit which includes a first gate driver circuit and a second gate driver circuit, wherein each pixel comprises; an EL device; a driving transistor to supply a current to the EL device; a first switch transistor provided on a current path through which the current is supplied by the driving transistor to the EL device; a second switch transistor provided to supply, to the driving transistor, an image signal supplied to a corresponding one of the plurality of source signal lines; a third switch transistor provided between a gate terminal and a drain terminal of the driving transistor; and a capacitor connected to the gate terminal of the driving transistor for holding the image signal, the third switch transistor has a multi-gate structure, the source driver circuit is configured to supply a signal voltage to the gate of the driving transistor to flow a current which is N times as large as a predetermined value to the EL device, N is greater than one, the first gate driver circuit includes a first gate signal line and the second gate driver circuit includes a second gate signal line, the first gate signal line is an on/off signal for the first switch transistor and is connected to a gate terminal of the first switch transistor, and the second gate signal line is an on/off signal for the second switch transistor and the third switch transistor and is connected to a gate terminal of the second switch transistor and a gate terminal of the third switch transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of manufacturing an electroluminescent (EL) display apparatus,
the EL display apparatus comprising: -
a display screen including a plurality of gate signal lines which is arranged to intersect a plurality of source signal lines, and a pixel corresponding to each intersection of the plurality of gate signal lines and the plurality of source signal lines; a source driver circuit connected to the plurality of source signal lines; and a gate driver circuit which includes a first gate driver circuit and a second gate driver circuit, wherein each pixel comprises; an EL device; a driving transistor to supply a current to the EL device; a first switch transistor provided on a current path through which the current is supplied by the driving transistor to the EL device; a second switch transistor provided to supply, to the driving transistor, an image signal supplied to a corresponding one of the plurality of source signal lines; a third switch transistor provided between a gate terminal and a drain terminal of the driving transistor; and a capacitor connected to the gate terminal of the driving transistor for holding the image signal, the first gate driver circuit includes a first gate signal line and the second gate driver circuit includes a second gate signal line, the first gate signal line is an on/off signal for the first switch transistor and is connected to a gate terminal of the first switch transistor, and the second gate signal line is an on/off signal for the second switch transistor and the third switch transistor and is connected to a gate terminal of the second switch transistor and a gate terminal of the third switch transistor, the method comprising; fabricating the third switch transistor with a multi-gate structure; and configuring the source driver circuit to supply a signal voltage to the gate of the driving transistor to flow a current which is N times as large as a predetermined value to the EL device, N being greater than one. - View Dependent Claims (13, 14)
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15. An electroluminescent (EL) display apparatus, comprising:
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a display screen including a plurality of gate signal lines which is arranged to intersect a plurality of source signal lines, and a pixel corresponding to each intersection of the plurality of gate signal lines and the plurality of source signal lines; and a gate driver circuit which includes a first gate driver circuit and a second gate driver circuit, wherein each pixel comprises; an EL device; a driving transistor to supply a current to the EL device; a first switch transistor provided on a current path through which the current is supplied by the driving transistor to the EL device; a second switch transistor provided to supply, to the driving transistor, an image signal supplied to a corresponding one of the plurality of source signal lines; a third switch transistor provided between a gate terminal and a drain terminal of the driving transistor; and a capacitor connected to the gate terminal of the driving transistor for holding the image signal, the third switch transistor has a multi-gate structure, the first gate driver circuit includes a first gate signal line and the second gate driver circuit includes a second gate signal line, the first gate signal line is an on/off signal for the first switch transistor and is connected to a gate terminal of the first switch transistor, and the second gate signal line is an on/off signal for the second switch transistor and the third switch transistor and is connected to a gate terminal of the second switch transistor and a gate terminal of the third switch transistor. - View Dependent Claims (16, 17, 18)
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Specification