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US 6,229,508 B1Granted
Active matrix light emitting diode pixel structure and concomitant method
AssigneeSarnoff Corporation
InventorMichael Gillis Kane
Life of this patent
Estimating the term…
Abstract
LED pixel structures and methods that improve brightness uniformity by reducing current nonuniformities in a light-emitting diode of the pixel structures are disclosed.
Claims9
A display comprising at least one pixel, said pixel comprising:
- a first transistor having a gate, a source and a drain, where said gate is for coupling to a first select line;
- a capacitor having a first and second terminals, where said drain of said first transistor is coupled to said first terminal of said capacitor;
- a second transistor having a gate, a source and a drain, where said drain of said first transistor is coupled to said drain of said second transistor, where said gate of said second transistor is for coupling to an autozero line;
- a third transistor having a gate, a source and a drain, where said source of said third transistor is coupled to said drain of said second transistor, where said gate of said third transistor is for coupling to a second select line;
- a fourth transistor having a gate, a source and a drain, where said drain of said fourth transistor is coupled to said source of said second transistor, where said gate of said fourth transistor is coupled to said source of said first transistor;
- a fifth transistor having a gate, a source and a drain, where said drain of said fifth transistor is coupled to said drain of said third transistor, where said gate of said fifth transistor is coupled to said source of said first transistor;
- and
- a light element having two terminals, where said source of said fourth transistor and said source of said fifth transistor are coupled to one of said terminal of said light element.
5 more elements
A display comprising at least one pixel, said pixel comprising:
- a first transistor having a gate, a source and a drain, where said gate is for coupling to a first select line;
- a capacitor having a first and second terminals, where said drain of said first transistor is coupled to said first terminal of said capacitor;
- a second transistor having a gate, a source and a drain, where said source of said first transistor is coupled to said source of said second transistor, where said gate of said second transistor is for coupling to an autozero line;
- a third transistor having a gate, a source and a drain, where said source of said third transistor is coupled to said drain of said second transistor, where said gate of said third transistor is for coupling to a second select line;
- a fourth transistor having a gate, a source and a drain, where said drain of said fourth transistor is coupled to said source of said third transistor, where said gate of said fourth transistor is coupled to said source of said first transistor;
- a fifth transistor having a gate, a source and a drain, where said drain of said fifth transistor is coupled to said drain of said third transistor, where said gate of said fifth transistor is coupled to said source of said first transistor;
- and
- a light element having two terminals, where said source of said fourth transistor and said source of said fifth transistor are coupled to one of said terminal of said light element.
5 more elements
A system comprising:
- a display controller;
- and
- a display, coupled to said display controller, where said display comprises a plurality of pixels, where each pixel comprises:
- a first transistor having a gate, a source and a drain, where said gate is for coupling to a first select line;
- a capacitor having a first and second terminals, where said drain of said first transistor is coupled to said first terminal of said capacitor;
- a second transistor having a gate, a source and a drain, where said source of said first transistor is coupled to said source of said second transistor, where said gate of said second transistor is for coupling to an autozero line;
- a third transistor having a gate, a source and a drain, where said source of said third transistor is coupled to said drain of said second transistor, where said gate of said third transistor is for coupling to a second select line;
- a fourth transistor having a gate, a source and a drain, where said drain of said fourth transistor is coupled to said source of said third transistor, where said gate of said fourth transistor is coupled to said source of said first transistor;
- a fifth transistor having a gate, a source and a drain, where said drain of said fifth transistor is coupled to said drain of said third transistor, where said gate of said fifth transistor is coupled to said source of said first transistor;
- and
- a light element having two terminals, where said source of said fourth transistor and said source of said fifth transistor are coupled to one of said terminal of said light element.
8 more elements
A system comprising:
- a display controller;
- and
- a display, coupled to said display controller, where said display comprises a plurality of pixels, where each pixel comprises:
- a first transistor having a gate, a source and a drain, where said gate is for coupling to a first select line;
- a capacitor having a first and second terminals, where said drain of said first transistor is coupled to said first terminal of said capacitor;
- a second transistor having a gate, a source and a drain, where said drain of said first transistor is coupled to said drain of said second transistor, where said gate of said second transistor is for coupling to an autozero line;
- a third transistor having a gate, a source and a drain, where said source of said third transistor is coupled to said drain of said second transistor, where said gate of said third transistor is for coupling to a second select line;
- a fourth transistor having a gate, a source and a drain, where said drain of said fourth transistor is coupled to said source of said second transistor, where said gate of said fourth transistor is coupled to said source of said first transistor;
- a fifth transistor having a gate, a source and a drain, where said drain of said fifth transistor is coupled to said drain of said third transistor, where said gate of said fifth transistor is coupled to said source of said first transistor;
- and
- a light element having two terminals, where said source of said fourth transistor and said source of said fifth transistor are coupled to one of said terminal of said light element.
8 more elements
Dependencies are inferred from the claim text.