Active matrix light emitting diode pixel structure and concomitant method
First Claim
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1. 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.
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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.
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Citations
20 Claims
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1. A display comprising at least one pixel, said pixel comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. A display comprising at least one pixel, said pixel comprising:
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a first transistor having a gate, a source and a drain, where said gate is for coupling to a 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 diode having a first and second terminals, where said source of said second transistor is coupled to said first terminal of said diode, where said second terminal of said diode is for coupling to an illuminate line;
a third transistor having a gate, a source and a drain, where said drain of said third transistor is coupled to said first terminal of said diode, where said gate of said third transistor is coupled to said source of said first transistor; and
a light element having two terminals, where said source of said third transistor is coupled to one of said terminal of said light element. - View Dependent Claims (6)
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7. A display comprising at least one pixel, said pixel comprising:
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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. - View Dependent Claims (8, 9)
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10. A display comprising:
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at least one autozeroing pixel structure;
an autozero line, coupled to said autozeroing pixel structure, for allowing said autozeroing pixel structure to perform autozeroing; and
a second line, coupled to said autozeroing pixel structure, for carrying a voltage to said autozeroing pixel structure that permits a range of autozero voltages to be extended.
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11. A method of illuminating a display having at least one pixel, where said pixel contains a circuit for controlling application of energy to a light element, said method comprising the steps of:
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(a) autozeroing the pixel;
(b) loading data onto said pixel via a data line; and
(c) illuminating said light element in accordance with said stored data. - View Dependent Claims (12, 13)
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14. A method of illuminating a display having at least one pixel, said method comprising the steps of:
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(a) measuring a pixel parameter of said pixel;
(b) adjusting an input pixel data in accordance with said measured pixel parameter; and
(c) illuminating said pixel in accordance with said adjusted input pixel data. - View Dependent Claims (15, 16, 17)
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18. A system comprising:
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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.
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19. A system comprising:
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a display controller having a measurement module for measuring a pixel parameter of a pixel and a storage for storing said measured pixel parameter; and
a display, coupled to said display controller, for displaying an input pixel data that is adjusted in accordance with said stored pixel parameter. - View Dependent Claims (20)
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Specification