OLED Display Voltage Supply Circuit for Photoelectric Recovery
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Solution Overview
Problem
Organic light emitting diode (OLED) display panels experience decay over time, leading to display abnormalities, which existing technologies have not effectively addressed.
Innovation Solution
A display apparatus and operation method that includes a voltage supply circuit coupled to a common voltage line, supplying a common voltage during normal operation and a reverse bias voltage higher than the common voltage during a recovery period to reversely bias the OLED, thereby recovering the photoelectric characteristics of the OLED.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reverse bias voltage is applied to OLED, then photoelectric characteristics are recovered, but additional voltage control complexity is introduced
Solution Approach 1:
The voltage supply circuit is designed to perform multiple functions: supplying common voltage to the common voltage line during normal display operation and supplying reverse bias voltage during recovery periods. This multi-functional approach consolidates voltage control operations into a single circuit, managing complexity while enabling both display functionality and OLED recovery.
Solution Approach 2:
The recovery operation is performed during non-display periods before the OLED degrades completely. By applying reverse bias voltage in advance during these intervals, the system proactively restores photoelectric characteristics, preventing display abnormalities before they occur and maintaining reliable operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The application of a reverse bias voltage during the recovery period significantly recovers the photoelectric characteristics of the OLED, effectively suppressing or improving the decay phenomenon in OLED pixel circuits.
Implementation Method 1
The voltage supply circuit supplies a reverse bias voltage higher than the common voltage to the common voltage line during a recovery period to reversely bias the OLED
Data Source
AI summary
A display apparatus and an operation method for a display panel thereof are provided. The display apparatus includes a display panel and a voltage supply circuit. The display panel includes a pixel circuit and a common voltage line. The pixel circuit includes an organic light emitting diode (OLED), wherein a cathode of the OLED is coupled to the common voltage line. The voltage supply circuit is coupled to the common voltage line of the display panel. The voltage supply circuit supplies a common voltage to the common voltage line during a normal operation period. The voltage supply circuit supplies a reverse bias voltage higher than the common voltage to the common voltage line during a recovery period to reversely bias the OLED.