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Organic light-emitting diode display with reduced lateral leakage

A technology of light-emitting diodes and displays, which is applied in semiconductor devices, electric solid-state devices, electrical components, etc., and can solve problems such as deterioration of pixel crosstalk

Active Publication Date: 2019-12-20
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pixel crosstalk due to lateral conduction through OLED layers can worsen with decreasing distance between pixels

Method used

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  • Organic light-emitting diode display with reduced lateral leakage
  • Organic light-emitting diode display with reduced lateral leakage
  • Organic light-emitting diode display with reduced lateral leakage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] figure 1An exemplary electronic device of the type that may be provided with a display is shown in . Electronic device 10 may be a computing device such as a laptop computer, a computer monitor including an embedded computer, a tablet computer, a cell phone, a media player or other handheld or portable electronic device, a smaller device such as a wrist watch device, pendant devices, headset or earpiece devices, devices embedded in eyeglasses or other devices worn on the user's head, or other wearable or miniature devices), displays, computer displays including embedded computers, excluding Computer monitors of embedded computers, gaming devices, navigation devices, embedded systems such as systems in which the electronic device with the display is installed in a kiosk or car, or other electronic devices. Electronic device 10 may have the shape of a pair of glasses (e.g., a support frame), may form a housing that has the shape of a helmet, or may have components to hel...

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Abstract

An organic light-emitting diode (OLED) display may have an array of organic light-emitting diode pixels that each have OLED layers interposed between a cathode and an anode. Voltage may be applied tothe anode of each pixel to control the magnitude of emitted light. The conductivity of the OLED layers may allow leakage current to pass between neighboring anodes in the display. To reduce leakage current and the accompanying cross-talk in a display, the pixel definition layer may disrupt continuity of the OLED layers. The pixel definition layer may have a steep sidewall, a sidewall with an undercut, or a sidewall surface with a plurality of curves to disrupt continuity of the OLED layers. A control gate that is coupled to a bias voltage and covered by gate dielectric may be used to form an organic thin-film transistor that shuts the leakage current channel between adjacent anodes on the display.

Description

[0001] This patent application claims priority to Provisional Patent Application No. 62 / 507,646, filed May 17, 2017, and Provisional Patent Application No. 62 / 635,433, filed February 26, 2018, which are hereby incorporated by reference in their entirety Incorporated into this article. Background technique [0002] The present invention relates generally to electronic devices, and more particularly to electronic devices having displays. [0003] Electronic devices often include displays. For example, an electronic device may have an organic light emitting diode (OLED) display based on organic light emitting diode pixels. In this type of display, each pixel includes a light-emitting diode and a thin-film transistor that controls the application of a signal to the light-emitting diode to produce light. A light emitting diode can include an OLED layer positioned between an anode and a cathode. [0004] In order to emit light from a given pixel in an OLED display, a voltage may ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32
CPCH10K59/123H10K59/124H10K59/121H10K59/125H10K59/122H10K59/131H10K59/805H10K59/173H01L27/124H10K71/00
Inventor 崔在仁A·林罗卓知黄俊尧G·王唐海榕山本均J·E·佩德金起范田广玉袁磊M·斯鲁特斯凯刘睿S·E·莫勒萨康盛球常文迪汤俊明陈宬I·克内兹E·多杰格托夫G·卡博尼G·B·迈尔李正敏
Owner APPLE INC
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