OLED DEVICE WITH EMBEDDED CHIP DRIVING
First Claim
1. An electroluminescent device having a plurality of current driven pixels arranged in rows and columns disposed over a substrate, such that when current is provided to a pixel it produces light, comprising:
- (a) each pixel having first and second electrodes and a current responsive electroluminescent media disposed between the first and second electrodes;
(b) at least one chiplet having a thickness less than 20 micrometers;
including transistor drive circuitry for controlling the operation of at least four pixels, the chiplet being mounted on the substrate and having connection pads;
(c) a planarization layer disposed over at least a portion of the chiplet;
(d) a first conductive layer disposed over the planarization layer and connected to at least one of the connection pads of the chiplet; and
(e) means for providing electrical signals through the first conductive layer and at least one of the connection pads of the chiplet so that the transistor drive circuitry of the chiplet controls current to the four pixels.
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Accused Products
Abstract
An electroluminescent device having a plurality of current driven pixels arranged in rows and columns, such that when current is provided to a pixel it produces light, including each pixel having first and second electrodes and current responsive electroluminescent media disposed between the first and second electrodes; at least one chiplet having a thickness less than 20 micrometers; including transistor drive circuitry for controlling the operation of at least four pixels, the chiplet being mounted on a substrate and having connection pads; a planarization layer disposed over at least a portion of the chiplet; a first conductive layer over the planarization layer and connected to at least one of the connection pads; and a structure for providing electrical signals through the first conductive layer and at least one of the connection pads of the chiplet so that the transistor drive circuitry of the chiplet controls current to the four pixels.
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Citations
25 Claims
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1. An electroluminescent device having a plurality of current driven pixels arranged in rows and columns disposed over a substrate, such that when current is provided to a pixel it produces light, comprising:
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(a) each pixel having first and second electrodes and a current responsive electroluminescent media disposed between the first and second electrodes; (b) at least one chiplet having a thickness less than 20 micrometers;
including transistor drive circuitry for controlling the operation of at least four pixels, the chiplet being mounted on the substrate and having connection pads;(c) a planarization layer disposed over at least a portion of the chiplet; (d) a first conductive layer disposed over the planarization layer and connected to at least one of the connection pads of the chiplet; and (e) means for providing electrical signals through the first conductive layer and at least one of the connection pads of the chiplet so that the transistor drive circuitry of the chiplet controls current to the four pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 22)
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17. An electroluminescent device having a plurality of current driven pixels disposed over a substrate, such that when current is provided to a pixel it produces light, comprising:
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(a) each pixel having first and second electrodes and a current responsive electroluminescent media disposed between the first and second electrodes; (b) a plurality of chiplets, each chiplet having a thickness less than 20 micrometers and each chiplet mounted over the substrate for controlling the operation of at least four pixels, wherein each chiplet comprises; (i) a semiconductor layer having doped regions forming source and drain regions and having a thickness of less than 10 micrometers; (ii) at least one insulator layer over the semiconductor layer; (iii) a first chiplet conductor layer arranged to form gate electrodes that correspond to the source and drain regions in the semiconductor layer thereby forming a plurality of transistors; (iv) a second chiplet conductor layer for providing electrical connection between the plurality of transistors to form drive circuits; and (v) a plurality of connection pads electrically connected to the drive circuits for transmitting current from the drive circuits to corresponding pixels in the electroluminescent display wherein the chiplet is mounted such that the connection pads are over the semiconductor layer and over the substrate. - View Dependent Claims (18, 19, 20)
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21. A chiplet for operating an electroluminescent element comprising:
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(a) a semiconductor layer having a doped well; (b) a first driving transistor having a doped source region and doped drain region formed in the doped well region of the semiconductor layer; (c) a first connection pad for connection to the electroluminescent element and electrically connected to one of either the doped source region or the doped drain region of the first driving transistor; (d) a connection pad for receiving power and electrically connected to doped well region and the other one of either the doped source region or the doped drain region of the first driving transistor.
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23. A method for making a colored organic electroluminescent device comprising:
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(a) forming color filter on a substrate; (b) mounting a chiplet on the substrate, the chiplet including transistor drive circuitry for controlling the operation of a plurality of pixels; (c) forming a planarization layer over the chiplet and the color filter; and (d) forming a electroluminescent media over the planarization layer and the color filter; and (e) electrically connecting to the chiplet to the electroluminescent media. - View Dependent Claims (24, 25)
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Specification