Optically testing chiplets in display device
First Claim
1. A display, comprising:
- (a) a display substrate having a display area, and a plurality of chiplets having a substrate independent of the display substrate located over the display substrate in the display area, each chiplet having at least one connection pad, at least one pixel control circuit, and at least one pixel test circuit;
(b) a plurality of pixels located in the display area, each pixel including a control electrode, a second electrode, and at least one layer of light-emitting material located between the control electrode and second electrode, wherein the pixel control circuit is connected to the control electrode for driving the control electrode causing the light-emitting material to emit light;
(c) a controller connected to one or more chiplets for providing external control signals to the chiplet; and
(d) wherein the pixel test circuit includes one or more test light emitters responsive to the external control signals, the test light emitters emitting light independently of the layer of light-emitting material.
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Accused Products
Abstract
A method of making a display includes providing a display substrate having a plurality of control electrodes in a display area; locating a plurality of chiplets responsive to a controller to provide current to the control electrodes, each chiplet having a separate substrate, at least one pixel connection pad electrically connected to a control electrode, and one or more test light emitters formed in the chiplet responsive to the current provided on the control electrodes to emit light; controlling the chiplets to pass current through one or more of the test light emitters formed in the chiplet to emit light; detecting the light emitted by the test light emitters to determine faulty chiplets or chiplet interconnections; replacing or repairing the faulty chiplets or chiplet interconnections; and forming an organic light emitting diode over the substrate in the display area connected to the control electrodes.
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Citations
11 Claims
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1. A display, comprising:
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(a) a display substrate having a display area, and a plurality of chiplets having a substrate independent of the display substrate located over the display substrate in the display area, each chiplet having at least one connection pad, at least one pixel control circuit, and at least one pixel test circuit; (b) a plurality of pixels located in the display area, each pixel including a control electrode, a second electrode, and at least one layer of light-emitting material located between the control electrode and second electrode, wherein the pixel control circuit is connected to the control electrode for driving the control electrode causing the light-emitting material to emit light; (c) a controller connected to one or more chiplets for providing external control signals to the chiplet; and (d) wherein the pixel test circuit includes one or more test light emitters responsive to the external control signals, the test light emitters emitting light independently of the layer of light-emitting material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification