Pixel structure of organic light emitting diode display
First Claim
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1. A pixel structure of an organic light emitting diode (OLED) display, comprising:
- a substrate;
a first transistor, disposed on the substrate, the first transistor being a switching transistor, and the first transistor comprising;
a first gate electrode;
an insulating layer, covering the first gate electrode and the substrate;
a first drain electrode, disposed on the insulating layer;
a first source electrode, disposed on the insulating layer;
a first channel layer, disposed on the insulating layer between the first drain electrode and the first source electrode, wherein when a voltage difference is provided between the first drain electrode and the first source electrode of the first transistor, the first transistor has a first subthreshold slope (SS); and
a first oxide layer, disposed on the first channel layer, and the first oxide layer being directly in contact with the first channel layer;
a second transistor, disposed on the substrate, the second transistor being a driving transistor, and the second transistor comprising;
a second gate electrode, disposed between the insulating layer and the substrate, the second gate electrode being electrically connected to the first drain electrode;
a second drain electrode, disposed on the insulating layer;
a second source electrode, disposed on the insulating layer; and
a second channel layer, disposed on the insulating layer between the second drain electrode and the second source electrode, wherein when the voltage difference is provided between the second drain electrode and the second source electrode of the second transistor, the second transistor has a second SS, and the second SS is larger than the first SS;
a first patterned passivation layer, covering a part of the first transistor and the second transistor, wherein the first oxide layer is disposed between the first channel layer and the first patterned passivation layer, the first patterned passivation layer is directly in contact with and covers the second channel layer, and the second channel layer and the first patterned passivation layer have no oxide layer disposed therebetween; and
an OLED, disposed on the second drain electrode and the first patterned passivation layer, wherein the second drain electrode is electrically connected to the OLED.
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Abstract
A pixel structure of an organic light emitting diode display includes a first transistor and a second transistor. The first transistor includes a first drain electrode and a first source electrode. When a voltage difference is provided between the first drain electrode and the first source electrode, the first transistor has a first subthreshold slope (SS). The second transistor includes a second drain electrode and a second source electrode. When the voltage difference is provided between the second drain electrode and the second source electrode, the second transistor has a second SS, and the second SS is larger than the first SS.
12 Citations
8 Claims
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1. A pixel structure of an organic light emitting diode (OLED) display, comprising:
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a substrate; a first transistor, disposed on the substrate, the first transistor being a switching transistor, and the first transistor comprising; a first gate electrode; an insulating layer, covering the first gate electrode and the substrate; a first drain electrode, disposed on the insulating layer; a first source electrode, disposed on the insulating layer; a first channel layer, disposed on the insulating layer between the first drain electrode and the first source electrode, wherein when a voltage difference is provided between the first drain electrode and the first source electrode of the first transistor, the first transistor has a first subthreshold slope (SS); and a first oxide layer, disposed on the first channel layer, and the first oxide layer being directly in contact with the first channel layer; a second transistor, disposed on the substrate, the second transistor being a driving transistor, and the second transistor comprising; a second gate electrode, disposed between the insulating layer and the substrate, the second gate electrode being electrically connected to the first drain electrode; a second drain electrode, disposed on the insulating layer; a second source electrode, disposed on the insulating layer; and a second channel layer, disposed on the insulating layer between the second drain electrode and the second source electrode, wherein when the voltage difference is provided between the second drain electrode and the second source electrode of the second transistor, the second transistor has a second SS, and the second SS is larger than the first SS; a first patterned passivation layer, covering a part of the first transistor and the second transistor, wherein the first oxide layer is disposed between the first channel layer and the first patterned passivation layer, the first patterned passivation layer is directly in contact with and covers the second channel layer, and the second channel layer and the first patterned passivation layer have no oxide layer disposed therebetween; and an OLED, disposed on the second drain electrode and the first patterned passivation layer, wherein the second drain electrode is electrically connected to the OLED. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification