Voltage-balanced serial iLED pixel and display
First Claim
Patent Images
1. A multi-color inorganic light-emitting diode (iLED) pixel, comprising:
- a common voltage signal and a common ground signal;
a first color sub-pixel comprising two or more first iLEDs, each first iLED emitting a first color of light when provided with electrical power at a first voltage, the two or more first iLEDs serially connected between the common voltage signal and the common ground signal;
a second color sub-pixel comprising one or more second iLEDs, each second iLED emitting a second color of light different from the first color when provided with electrical power at a second voltage different from the first voltage, the one or more second iLEDs serially connected between the common voltage signal and the common ground signal;
a third color sub-pixel comprising one or more third iLEDs each emitting a third color of light different from the first and second colors of light when provided with electrical power at a third voltage different from the first or second voltage, the one or more third iLEDs serially connected between the common voltage signal and the common ground signal; and
a pixel controller that provides a first control signal for controlling the one or more first iLEDs to emit light and a second control signal for controlling the one or more second iLEDs to emit light,wherein the number of first iLEDs is different from the number of second iLEDs and the number of second iLEDs is the same as the number of third iLEDs,wherein a ratio of a controlling attribute of the first control signal to a controlling attribute of the second control signal is dependent on a ratio of the number of first iLEDs to the number of second iLEDs, andwherein at least one iLED of the first color sub-pixel, the second color sub-pixel, or the third color sub-pixel has a width from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, has a length from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, or has a height from 2 to 5 μ
m, 4 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m.
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Abstract
A multi-color inorganic light-emitting diode (iLED) display includes a display substrate with a common voltage signal and a common ground signal and a plurality of multi-color pixels. In certain embodiments, each multi-color pixel includes a first color sub-pixel including two or more first iLEDs, a second color sub-pixel including one or more second iLEDs, and a third color sub-pixel including one or more third iLEDs. The two or more first iLEDs are serially connected between the common voltage signal and the common ground signal, the one or more second iLEDs are serially connected between the common voltage signal and the common ground signal, and the one or more third iLEDs are serially connected between the common voltage signal and the common ground signal.
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Citations
20 Claims
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1. A multi-color inorganic light-emitting diode (iLED) pixel, comprising:
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a common voltage signal and a common ground signal; a first color sub-pixel comprising two or more first iLEDs, each first iLED emitting a first color of light when provided with electrical power at a first voltage, the two or more first iLEDs serially connected between the common voltage signal and the common ground signal; a second color sub-pixel comprising one or more second iLEDs, each second iLED emitting a second color of light different from the first color when provided with electrical power at a second voltage different from the first voltage, the one or more second iLEDs serially connected between the common voltage signal and the common ground signal; a third color sub-pixel comprising one or more third iLEDs each emitting a third color of light different from the first and second colors of light when provided with electrical power at a third voltage different from the first or second voltage, the one or more third iLEDs serially connected between the common voltage signal and the common ground signal; and a pixel controller that provides a first control signal for controlling the one or more first iLEDs to emit light and a second control signal for controlling the one or more second iLEDs to emit light, wherein the number of first iLEDs is different from the number of second iLEDs and the number of second iLEDs is the same as the number of third iLEDs, wherein a ratio of a controlling attribute of the first control signal to a controlling attribute of the second control signal is dependent on a ratio of the number of first iLEDs to the number of second iLEDs, and wherein at least one iLED of the first color sub-pixel, the second color sub-pixel, or the third color sub-pixel has a width from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, has a length from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, or has a height from 2 to 5 μ
m, 4 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m. - View Dependent Claims (2, 3, 4, 13, 14, 15, 16, 17, 18, 19, 20)
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5. A method of making a multi-color inorganic light-emitting diode (iLED) pixel, comprising:
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providing a display substrate having a common voltage signal and a common ground signal on the display substrate; providing a first color sub-pixel comprising two or more first iLEDs on or over the display substrate, each first iLED emitting a first color of light when provided with electrical power at a first voltage, the two or more first iLEDs serially connected between the common voltage signal and the common ground signal; and providing a second color sub-pixel comprising one or more second iLEDs on or over the display substrate, each second iLED emitting a second color of light different from the first color when provided with electrical power at a second voltage different from the first voltage, the one or more second iLEDs serially connected between the common voltage signal and the common ground signal; providing a third color sub-pixel comprising one or more third iLEDs on or over the display substrate, each third iLED emitting a third color of light different from the first and second colors of light when provided with electrical power at a third voltage different from the first or second voltage, the one or more third iLEDs serially connected between the common voltage signal and the common ground signal; and providing a pixel controller that provides a first control signal for controlling the one or more first iLEDs to emit light and a second control signal for controlling the one or more second iLEDs to emit light, wherein the number of first iLEDs is different from the number of second iLEDs and the number of second iLEDs is the same as the number of third iLEDs, wherein a ratio of a controlling attribute of the first control signal to a controlling attribute of the second control signal is dependent on a ratio of the number of first iLEDs to the number of second iLEDs, and wherein at least one iLED of the first color sub-pixel, the second color sub-pixel, or the third color sub-pixel has a width from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, has a length from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, or has a height from 2 to 5 μ
m, 4 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A multi-color inorganic light-emitting diode (iLED) display, comprising:
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a display substrate; a common voltage signal and a common ground signal disposed on the display substrate; and a plurality of multi-color iLED pixels disposed in an array in, on, or over the display substrate, each multi-color pixel comprising; a first color sub-pixel comprising two or more first iLEDs, each first iLED emitting a first color of light when provided with electrical power at a first voltage, the two or more first iLEDs serially connected between the common voltage signal and the common ground signal; a second color sub-pixel comprising one or more second iLEDs, each second iLED emitting a second color of light different from the first color when provided with electrical power at a second voltage different from the first voltage, the one or more second iLEDs serially connected between the common voltage signal and the common ground signal; a third color sub-pixel comprising one or more third iLEDs, each third iLED emitting a third color of light different from the first and second colors when provided with electrical power at a third voltage different from the first voltage or the second voltage, the one or more third iLEDs serially connected between the common voltage signal and the common ground signal; and a pixel controller that provides a first control signal for controlling the one or more first iLEDs to emit light and a second control signal for controlling the one or more second iLEDs to emit light, wherein the number of first iLEDs is different from the number of second iLEDs and the number of second iLEDs is the same as the number of third iLEDs, wherein a ratio of a controlling attribute of the first control signal to a controlling attribute of the second control signal is dependent on a ratio of the number of first iLEDs to the number of second iLEDs, and wherein at least one iLED of the first, second, or third iLEDs has a width from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, has a length from 2 to 5 μ
m, 5 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m, or has a height from 2 to 5 μ
m, 4 to 10 μ
m, 10 to 20 μ
m, or 20 to 50 μ
m.
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Specification
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Current AssigneeX Display Company Technology Limited (Sensinnovat BVBA)
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Original AssigneeX-Celeprint Limited
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InventorsRaymond, Brook, Cok, Ronald S., Meitl, Matthew
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Primary Examiner(s)Chang, Kent W
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Assistant Examiner(s)Brittingham, Nathaniel P
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Application NumberUS15/610,297Publication NumberTime in Patent Office874 DaysField of SearchUS Class CurrentCPC Class CodesG09G 2300/0452 Details of colour pixel set...G09G 2320/0666 for control of colour param...G09G 3/32 semiconductive, e.g. using ...H01L 2224/18 High density interconnect [...H01L 25/0753 the devices being arranged ...H01L 33/62 Arrangements for conducting...
